X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/fe8ab488e9161c46dd9885d58fc52996dc0249ff..f427ee49d309d8fc33ebf3042c3a775f2f530ded:/bsd/kern/uipc_socket.c?ds=inline diff --git a/bsd/kern/uipc_socket.c b/bsd/kern/uipc_socket.c index 6b57b3cf8..607af6d3c 100644 --- a/bsd/kern/uipc_socket.c +++ b/bsd/kern/uipc_socket.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 1998-2014 Apple Inc. All rights reserved. + * Copyright (c) 1998-2020 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -98,10 +98,14 @@ #include #include #include +#include #include #include #include #include +#include +#include +#include #include #include #include @@ -112,12 +116,14 @@ #include #include #include +#include + #include #include #include +#include #if CONFIG_MACF -#include #include #endif /* MAC */ @@ -126,92 +132,133 @@ #include #endif /* MULTIPATH */ +#define ROUNDUP(a, b) (((a) + ((b) - 1)) & (~((b) - 1))) + +#if DEBUG || DEVELOPMENT +#define DEBUG_KERNEL_ADDRPERM(_v) (_v) +#else +#define DEBUG_KERNEL_ADDRPERM(_v) VM_KERNEL_ADDRPERM(_v) +#endif + /* TODO: this should be in a header file somewhere */ extern char *proc_name_address(void *p); -static u_int32_t so_cache_hw; /* High water mark for socache */ -static u_int32_t so_cache_timeouts; /* number of timeouts */ -static u_int32_t so_cache_max_freed; /* max freed per timeout */ -static u_int32_t cached_sock_count = 0; -STAILQ_HEAD(, socket) so_cache_head; -int max_cached_sock_count = MAX_CACHED_SOCKETS; -static u_int32_t so_cache_time; -static int socketinit_done; -static struct zone *so_cache_zone; - -static lck_grp_t *so_cache_mtx_grp; -static lck_attr_t *so_cache_mtx_attr; -static lck_grp_attr_t *so_cache_mtx_grp_attr; -static lck_mtx_t *so_cache_mtx; +static u_int32_t so_cache_hw; /* High water mark for socache */ +static u_int32_t so_cache_timeouts; /* number of timeouts */ +static u_int32_t so_cache_max_freed; /* max freed per timeout */ +static u_int32_t cached_sock_count = 0; +STAILQ_HEAD(, socket) so_cache_head; +int max_cached_sock_count = MAX_CACHED_SOCKETS; +static u_int32_t so_cache_time; +static int socketinit_done; +static struct zone *so_cache_zone; + +static lck_grp_t *so_cache_mtx_grp; +static lck_attr_t *so_cache_mtx_attr; +static lck_grp_attr_t *so_cache_mtx_grp_attr; +static lck_mtx_t *so_cache_mtx; #include -static void filt_sordetach(struct knote *kn); -static int filt_soread(struct knote *kn, long hint); -static void filt_sowdetach(struct knote *kn); -static int filt_sowrite(struct knote *kn, long hint); -static void filt_sockdetach(struct knote *kn); -static int filt_sockev(struct knote *kn, long hint); +static int filt_sorattach(struct knote *kn, struct kevent_qos_s *kev); +static void filt_sordetach(struct knote *kn); +static int filt_soread(struct knote *kn, long hint); +static int filt_sortouch(struct knote *kn, struct kevent_qos_s *kev); +static int filt_sorprocess(struct knote *kn, struct kevent_qos_s *kev); + +static int filt_sowattach(struct knote *kn, struct kevent_qos_s *kev); +static void filt_sowdetach(struct knote *kn); +static int filt_sowrite(struct knote *kn, long hint); +static int filt_sowtouch(struct knote *kn, struct kevent_qos_s *kev); +static int filt_sowprocess(struct knote *kn, struct kevent_qos_s *kev); + +static int filt_sockattach(struct knote *kn, struct kevent_qos_s *kev); +static void filt_sockdetach(struct knote *kn); +static int filt_sockev(struct knote *kn, long hint); +static int filt_socktouch(struct knote *kn, struct kevent_qos_s *kev); +static int filt_sockprocess(struct knote *kn, struct kevent_qos_s *kev); static int sooptcopyin_timeval(struct sockopt *, struct timeval *); static int sooptcopyout_timeval(struct sockopt *, const struct timeval *); -static struct filterops soread_filtops = { +SECURITY_READ_ONLY_EARLY(struct filterops) soread_filtops = { .f_isfd = 1, + .f_attach = filt_sorattach, .f_detach = filt_sordetach, .f_event = filt_soread, + .f_touch = filt_sortouch, + .f_process = filt_sorprocess, }; -static struct filterops sowrite_filtops = { +SECURITY_READ_ONLY_EARLY(struct filterops) sowrite_filtops = { .f_isfd = 1, + .f_attach = filt_sowattach, .f_detach = filt_sowdetach, .f_event = filt_sowrite, + .f_touch = filt_sowtouch, + .f_process = filt_sowprocess, }; -static struct filterops sock_filtops = { +SECURITY_READ_ONLY_EARLY(struct filterops) sock_filtops = { .f_isfd = 1, + .f_attach = filt_sockattach, .f_detach = filt_sockdetach, .f_event = filt_sockev, + .f_touch = filt_socktouch, + .f_process = filt_sockprocess, +}; + +SECURITY_READ_ONLY_EARLY(struct filterops) soexcept_filtops = { + .f_isfd = 1, + .f_attach = filt_sorattach, + .f_detach = filt_sordetach, + .f_event = filt_soread, + .f_touch = filt_sortouch, + .f_process = filt_sorprocess, }; SYSCTL_DECL(_kern_ipc); -#define EVEN_MORE_LOCKING_DEBUG 0 +#define EVEN_MORE_LOCKING_DEBUG 0 int socket_debug = 0; SYSCTL_INT(_kern_ipc, OID_AUTO, socket_debug, - CTLFLAG_RW | CTLFLAG_LOCKED, &socket_debug, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &socket_debug, 0, ""); -static int socket_zone = M_SOCKET; -so_gen_t so_gencnt; /* generation count for sockets */ +static unsigned long sodefunct_calls = 0; +SYSCTL_LONG(_kern_ipc, OID_AUTO, sodefunct_calls, CTLFLAG_LOCKED, + &sodefunct_calls, ""); + +ZONE_DECLARE(socket_zone, "socket", sizeof(struct socket), ZC_ZFREE_CLEARMEM); +so_gen_t so_gencnt; /* generation count for sockets */ MALLOC_DEFINE(M_SONAME, "soname", "socket name"); MALLOC_DEFINE(M_PCB, "pcb", "protocol control block"); -#define DBG_LAYER_IN_BEG NETDBG_CODE(DBG_NETSOCK, 0) -#define DBG_LAYER_IN_END NETDBG_CODE(DBG_NETSOCK, 2) -#define DBG_LAYER_OUT_BEG NETDBG_CODE(DBG_NETSOCK, 1) -#define DBG_LAYER_OUT_END NETDBG_CODE(DBG_NETSOCK, 3) -#define DBG_FNC_SOSEND NETDBG_CODE(DBG_NETSOCK, (4 << 8) | 1) -#define DBG_FNC_SOSEND_LIST NETDBG_CODE(DBG_NETSOCK, (4 << 8) | 3) -#define DBG_FNC_SORECEIVE NETDBG_CODE(DBG_NETSOCK, (8 << 8)) -#define DBG_FNC_SORECEIVE_LIST NETDBG_CODE(DBG_NETSOCK, (8 << 8) | 3) -#define DBG_FNC_SOSHUTDOWN NETDBG_CODE(DBG_NETSOCK, (9 << 8)) +#define DBG_LAYER_IN_BEG NETDBG_CODE(DBG_NETSOCK, 0) +#define DBG_LAYER_IN_END NETDBG_CODE(DBG_NETSOCK, 2) +#define DBG_LAYER_OUT_BEG NETDBG_CODE(DBG_NETSOCK, 1) +#define DBG_LAYER_OUT_END NETDBG_CODE(DBG_NETSOCK, 3) +#define DBG_FNC_SOSEND NETDBG_CODE(DBG_NETSOCK, (4 << 8) | 1) +#define DBG_FNC_SOSEND_LIST NETDBG_CODE(DBG_NETSOCK, (4 << 8) | 3) +#define DBG_FNC_SORECEIVE NETDBG_CODE(DBG_NETSOCK, (8 << 8)) +#define DBG_FNC_SORECEIVE_LIST NETDBG_CODE(DBG_NETSOCK, (8 << 8) | 3) +#define DBG_FNC_SOSHUTDOWN NETDBG_CODE(DBG_NETSOCK, (9 << 8)) -#define MAX_SOOPTGETM_SIZE (128 * MCLBYTES) +#define MAX_SOOPTGETM_SIZE (128 * MCLBYTES) int somaxconn = SOMAXCONN; SYSCTL_INT(_kern_ipc, KIPC_SOMAXCONN, somaxconn, - CTLFLAG_RW | CTLFLAG_LOCKED, &somaxconn, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &somaxconn, 0, ""); /* Should we get a maximum also ??? */ static int sosendmaxchain = 65536; static int sosendminchain = 16384; static int sorecvmincopy = 16384; SYSCTL_INT(_kern_ipc, OID_AUTO, sosendminchain, - CTLFLAG_RW | CTLFLAG_LOCKED, &sosendminchain, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &sosendminchain, 0, ""); SYSCTL_INT(_kern_ipc, OID_AUTO, sorecvmincopy, - CTLFLAG_RW | CTLFLAG_LOCKED, &sorecvmincopy, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &sorecvmincopy, 0, ""); /* * Set to enable jumbo clusters (if available) for large writes when @@ -219,7 +266,7 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, sorecvmincopy, */ int sosendjcl = 1; SYSCTL_INT(_kern_ipc, OID_AUTO, sosendjcl, - CTLFLAG_RW | CTLFLAG_LOCKED, &sosendjcl, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &sosendjcl, 0, ""); /* * Set this to ignore SOF_MULTIPAGES and use jumbo clusters for large @@ -234,27 +281,52 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, sosendjcl, */ int sosendjcl_ignore_capab = 0; SYSCTL_INT(_kern_ipc, OID_AUTO, sosendjcl_ignore_capab, - CTLFLAG_RW | CTLFLAG_LOCKED, &sosendjcl_ignore_capab, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &sosendjcl_ignore_capab, 0, ""); +/* + * Set this to ignore SOF1_IF_2KCL and use big clusters for large + * writes on the socket for all protocols on any network interfaces. + * Be extra careful when setting this to 1, because sending down packets with + * clusters larger that 2 KB might lead to system panics or data corruption. + * When set to 0, the system will respect SOF1_IF_2KCL, which is set + * on the outgoing interface + * Set this to 1 for testing/debugging purposes only. + */ int sosendbigcl_ignore_capab = 0; SYSCTL_INT(_kern_ipc, OID_AUTO, sosendbigcl_ignore_capab, - CTLFLAG_RW | CTLFLAG_LOCKED, &sosendbigcl_ignore_capab, 0, ""); + CTLFLAG_RW | CTLFLAG_LOCKED, &sosendbigcl_ignore_capab, 0, ""); int sodefunctlog = 0; SYSCTL_INT(_kern_ipc, OID_AUTO, sodefunctlog, CTLFLAG_RW | CTLFLAG_LOCKED, - &sodefunctlog, 0, ""); + &sodefunctlog, 0, ""); int sothrottlelog = 0; SYSCTL_INT(_kern_ipc, OID_AUTO, sothrottlelog, CTLFLAG_RW | CTLFLAG_LOCKED, - &sothrottlelog, 0, ""); + &sothrottlelog, 0, ""); int sorestrictrecv = 1; SYSCTL_INT(_kern_ipc, OID_AUTO, sorestrictrecv, CTLFLAG_RW | CTLFLAG_LOCKED, - &sorestrictrecv, 0, "Enable inbound interface restrictions"); + &sorestrictrecv, 0, "Enable inbound interface restrictions"); int sorestrictsend = 1; SYSCTL_INT(_kern_ipc, OID_AUTO, sorestrictsend, CTLFLAG_RW | CTLFLAG_LOCKED, - &sorestrictsend, 0, "Enable outbound interface restrictions"); + &sorestrictsend, 0, "Enable outbound interface restrictions"); + +int soreserveheadroom = 1; +SYSCTL_INT(_kern_ipc, OID_AUTO, soreserveheadroom, CTLFLAG_RW | CTLFLAG_LOCKED, + &soreserveheadroom, 0, "To allocate contiguous datagram buffers"); + +#if (DEBUG || DEVELOPMENT) +int so_notsent_lowat_check = 1; +SYSCTL_INT(_kern_ipc, OID_AUTO, notsent_lowat, CTLFLAG_RW | CTLFLAG_LOCKED, + &so_notsent_lowat_check, 0, "enable/disable notsnet lowat check"); +#endif /* DEBUG || DEVELOPMENT */ + +int so_accept_list_waits = 0; +#if (DEBUG || DEVELOPMENT) +SYSCTL_INT(_kern_ipc, OID_AUTO, accept_list_waits, CTLFLAG_RW | CTLFLAG_LOCKED, + &so_accept_list_waits, 0, "number of waits for listener incomp list"); +#endif /* DEBUG || DEVELOPMENT */ extern struct inpcbinfo tcbinfo; @@ -262,26 +334,50 @@ extern struct inpcbinfo tcbinfo; extern int get_inpcb_str_size(void); extern int get_tcp_str_size(void); -static unsigned int sl_zone_size; /* size of sockaddr_list */ -static struct zone *sl_zone; /* zone for sockaddr_list */ +vm_size_t so_cache_zone_element_size; + +static int sodelayed_copy(struct socket *, struct uio *, struct mbuf **, + user_ssize_t *); +static void cached_sock_alloc(struct socket **, zalloc_flags_t); +static void cached_sock_free(struct socket *); + +/* + * Maximum of extended background idle sockets per process + * Set to zero to disable further setting of the option + */ -static unsigned int se_zone_size; /* size of sockaddr_entry */ -static struct zone *se_zone; /* zone for sockaddr_entry */ +#define SO_IDLE_BK_IDLE_MAX_PER_PROC 1 +#define SO_IDLE_BK_IDLE_TIME 600 +#define SO_IDLE_BK_IDLE_RCV_HIWAT 131072 -vm_size_t so_cache_zone_element_size; +struct soextbkidlestat soextbkidlestat; + +SYSCTL_UINT(_kern_ipc, OID_AUTO, maxextbkidleperproc, + CTLFLAG_RW | CTLFLAG_LOCKED, &soextbkidlestat.so_xbkidle_maxperproc, 0, + "Maximum of extended background idle sockets per process"); + +SYSCTL_UINT(_kern_ipc, OID_AUTO, extbkidletime, CTLFLAG_RW | CTLFLAG_LOCKED, + &soextbkidlestat.so_xbkidle_time, 0, + "Time in seconds to keep extended background idle sockets"); + +SYSCTL_UINT(_kern_ipc, OID_AUTO, extbkidlercvhiwat, CTLFLAG_RW | CTLFLAG_LOCKED, + &soextbkidlestat.so_xbkidle_rcvhiwat, 0, + "High water mark for extended background idle sockets"); + +SYSCTL_STRUCT(_kern_ipc, OID_AUTO, extbkidlestat, CTLFLAG_RD | CTLFLAG_LOCKED, + &soextbkidlestat, soextbkidlestat, ""); + +int so_set_extended_bk_idle(struct socket *, int); -static int sodelayed_copy(struct socket *, struct uio *, struct mbuf **, user_ssize_t *); -static void cached_sock_alloc(struct socket **, int); -static void cached_sock_free(struct socket *); /* * SOTCDB_NO_DSCP is set by default, to prevent the networking stack from * setting the DSCP code on the packet based on the service class; see * for details. */ -__private_extern__ u_int32_t sotcdb = SOTCDB_NO_DSCP; +__private_extern__ u_int32_t sotcdb = 0; SYSCTL_INT(_kern_ipc, OID_AUTO, sotcdb, CTLFLAG_RW | CTLFLAG_LOCKED, - &sotcdb, 0, ""); + &sotcdb, 0, ""); void socketinit(void) @@ -289,6 +385,22 @@ socketinit(void) _CASSERT(sizeof(so_gencnt) == sizeof(uint64_t)); VERIFY(IS_P2ALIGNED(&so_gencnt, sizeof(uint32_t))); +#ifdef __LP64__ + _CASSERT(sizeof(struct sa_endpoints) == sizeof(struct user64_sa_endpoints)); + _CASSERT(offsetof(struct sa_endpoints, sae_srcif) == offsetof(struct user64_sa_endpoints, sae_srcif)); + _CASSERT(offsetof(struct sa_endpoints, sae_srcaddr) == offsetof(struct user64_sa_endpoints, sae_srcaddr)); + _CASSERT(offsetof(struct sa_endpoints, sae_srcaddrlen) == offsetof(struct user64_sa_endpoints, sae_srcaddrlen)); + _CASSERT(offsetof(struct sa_endpoints, sae_dstaddr) == offsetof(struct user64_sa_endpoints, sae_dstaddr)); + _CASSERT(offsetof(struct sa_endpoints, sae_dstaddrlen) == offsetof(struct user64_sa_endpoints, sae_dstaddrlen)); +#else + _CASSERT(sizeof(struct sa_endpoints) == sizeof(struct user32_sa_endpoints)); + _CASSERT(offsetof(struct sa_endpoints, sae_srcif) == offsetof(struct user32_sa_endpoints, sae_srcif)); + _CASSERT(offsetof(struct sa_endpoints, sae_srcaddr) == offsetof(struct user32_sa_endpoints, sae_srcaddr)); + _CASSERT(offsetof(struct sa_endpoints, sae_srcaddrlen) == offsetof(struct user32_sa_endpoints, sae_srcaddrlen)); + _CASSERT(offsetof(struct sa_endpoints, sae_dstaddr) == offsetof(struct user32_sa_endpoints, sae_dstaddr)); + _CASSERT(offsetof(struct sa_endpoints, sae_dstaddrlen) == offsetof(struct user32_sa_endpoints, sae_dstaddrlen)); +#endif + if (socketinit_done) { printf("socketinit: already called...\n"); return; @@ -296,7 +408,7 @@ socketinit(void) socketinit_done = 1; PE_parse_boot_argn("socket_debug", &socket_debug, - sizeof (socket_debug)); + sizeof(socket_debug)); /* * allocate lock group attribute and group for socket cache mutex @@ -318,32 +430,16 @@ socketinit(void) } STAILQ_INIT(&so_cache_head); - so_cache_zone_element_size = (vm_size_t)(sizeof (struct socket) + 4 + so_cache_zone_element_size = (vm_size_t)(sizeof(struct socket) + 4 + get_inpcb_str_size() + 4 + get_tcp_str_size()); - so_cache_zone = zinit(so_cache_zone_element_size, - (120000 * so_cache_zone_element_size), 8192, "socache zone"); - zone_change(so_cache_zone, Z_CALLERACCT, FALSE); - zone_change(so_cache_zone, Z_NOENCRYPT, TRUE); - - sl_zone_size = sizeof (struct sockaddr_list); - if ((sl_zone = zinit(sl_zone_size, 1024 * sl_zone_size, 1024, - "sockaddr_list")) == NULL) { - panic("%s: unable to allocate sockaddr_list zone\n", __func__); - /* NOTREACHED */ - } - zone_change(sl_zone, Z_CALLERACCT, FALSE); - zone_change(sl_zone, Z_EXPAND, TRUE); - - se_zone_size = sizeof (struct sockaddr_entry); - if ((se_zone = zinit(se_zone_size, 1024 * se_zone_size, 1024, - "sockaddr_entry")) == NULL) { - panic("%s: unable to allocate sockaddr_entry zone\n", __func__); - /* NOTREACHED */ - } - zone_change(se_zone, Z_CALLERACCT, FALSE); - zone_change(se_zone, Z_EXPAND, TRUE); + so_cache_zone = zone_create("socache zone", so_cache_zone_element_size, + ZC_ZFREE_CLEARMEM | ZC_NOENCRYPT); + bzero(&soextbkidlestat, sizeof(struct soextbkidlestat)); + soextbkidlestat.so_xbkidle_maxperproc = SO_IDLE_BK_IDLE_MAX_PER_PROC; + soextbkidlestat.so_xbkidle_time = SO_IDLE_BK_IDLE_TIME; + soextbkidlestat.so_xbkidle_rcvhiwat = SO_IDLE_BK_IDLE_RCV_HIWAT; in_pcbinit(); sflt_init(); @@ -354,9 +450,9 @@ socketinit(void) } static void -cached_sock_alloc(struct socket **so, int waitok) +cached_sock_alloc(struct socket **so, zalloc_flags_t how) { - caddr_t temp; + caddr_t temp; uintptr_t offset; lck_mtx_lock(so_cache_mtx); @@ -372,31 +468,22 @@ cached_sock_alloc(struct socket **so, int waitok) lck_mtx_unlock(so_cache_mtx); temp = (*so)->so_saved_pcb; - bzero((caddr_t)*so, sizeof (struct socket)); + bzero((caddr_t)*so, sizeof(struct socket)); (*so)->so_saved_pcb = temp; } else { - lck_mtx_unlock(so_cache_mtx); - if (waitok) - *so = (struct socket *)zalloc(so_cache_zone); - else - *so = (struct socket *)zalloc_noblock(so_cache_zone); - - if (*so == NULL) - return; - - bzero((caddr_t)*so, sizeof (struct socket)); + *so = zalloc_flags(so_cache_zone, how | Z_ZERO); /* - * Define offsets for extra structures into our - * single block of memory. Align extra structures + * Define offsets for extra structures into our + * single block of memory. Align extra structures * on longword boundaries. */ offset = (uintptr_t)*so; - offset += sizeof (struct socket); + offset += sizeof(struct socket); offset = ALIGN(offset); @@ -409,13 +496,12 @@ cached_sock_alloc(struct socket **so, int waitok) (caddr_t)offset; } - (*so)->cached_in_sock_layer = true; + OSBitOrAtomic(SOF1_CACHED_IN_SOCK_LAYER, &(*so)->so_flags1); } static void cached_sock_free(struct socket *so) { - lck_mtx_lock(so_cache_mtx); so_cache_time = net_uptime(); @@ -424,8 +510,9 @@ cached_sock_free(struct socket *so) lck_mtx_unlock(so_cache_mtx); zfree(so_cache_zone, so); } else { - if (so_cache_hw < cached_sock_count) + if (so_cache_hw < cached_sock_count) { so_cache_hw = cached_sock_count; + } STAILQ_INSERT_TAIL(&so_cache_head, so, so_cache_ent); @@ -442,15 +529,19 @@ so_update_last_owner_locked(struct socket *so, proc_t self) * last_pid and last_upid should remain zero for sockets * created using sock_socket. The check above achieves that */ - if (self == PROC_NULL) + if (self == PROC_NULL) { self = current_proc(); + } if (so->last_upid != proc_uniqueid(self) || so->last_pid != proc_pid(self)) { so->last_upid = proc_uniqueid(self); so->last_pid = proc_pid(self); proc_getexecutableuuid(self, so->last_uuid, - sizeof (so->last_uuid)); + sizeof(so->last_uuid)); + if (so->so_proto != NULL && so->so_proto->pr_update_last_owner != NULL) { + (*so->so_proto->pr_update_last_owner)(so, self, NULL); + } } proc_pidoriginatoruuid(so->so_vuuid, sizeof(so->so_vuuid)); } @@ -459,24 +550,28 @@ so_update_last_owner_locked(struct socket *so, proc_t self) void so_update_policy(struct socket *so) { - if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) + if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { (void) inp_update_policy(sotoinpcb(so)); + } } #if NECP static void -so_update_necp_policy(struct socket *so, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr) +so_update_necp_policy(struct socket *so, struct sockaddr *override_local_addr, + struct sockaddr *override_remote_addr) { - if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) - inp_update_necp_policy(sotoinpcb(so), override_local_addr, override_remote_addr, 0); + if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { + inp_update_necp_policy(sotoinpcb(so), override_local_addr, + override_remote_addr, 0); + } } #endif /* NECP */ boolean_t so_cache_timer(void) { - struct socket *p; - int n_freed = 0; + struct socket *p; + int n_freed = 0; boolean_t rc = FALSE; lck_mtx_lock(so_cache_mtx); @@ -486,9 +581,10 @@ so_cache_timer(void) while (!STAILQ_EMPTY(&so_cache_head)) { VERIFY(cached_sock_count > 0); p = STAILQ_FIRST(&so_cache_head); - if ((so_cache_time - p->cache_timestamp) < - SO_CACHE_TIME_LIMIT) + if ((so_cache_time - p->cache_timestamp) < + SO_CACHE_TIME_LIMIT) { break; + } STAILQ_REMOVE_HEAD(&so_cache_head, so_cache_ent); --cached_sock_count; @@ -502,11 +598,12 @@ so_cache_timer(void) } /* Schedule again if there is more to cleanup */ - if (!STAILQ_EMPTY(&so_cache_head)) + if (!STAILQ_EMPTY(&so_cache_head)) { rc = TRUE; + } lck_mtx_unlock(so_cache_mtx); - return (rc); + return rc; } /* @@ -519,29 +616,24 @@ so_cache_timer(void) struct socket * soalloc(int waitok, int dom, int type) { + zalloc_flags_t how = waitok ? Z_WAITOK : Z_NOWAIT; struct socket *so; if ((dom == PF_INET) && (type == SOCK_STREAM)) { - cached_sock_alloc(&so, waitok); + cached_sock_alloc(&so, how); } else { - MALLOC_ZONE(so, struct socket *, sizeof (*so), socket_zone, - M_WAITOK); - if (so != NULL) - bzero(so, sizeof (*so)); + so = zalloc_flags(socket_zone, how | Z_ZERO); } if (so != NULL) { so->so_gencnt = OSIncrementAtomic64((SInt64 *)&so_gencnt); - so->so_zone = socket_zone; -#if CONFIG_MACF_SOCKET - /* Convert waitok to M_WAITOK/M_NOWAIT for MAC Framework. */ - if (mac_socket_label_init(so, !waitok) != 0) { - sodealloc(so); - return (NULL); - } -#endif /* MAC_SOCKET */ + + /* + * Increment the socket allocation statistics + */ + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_alloc_total); } - return (so); + return so; } int @@ -551,6 +643,9 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, struct protosw *prp; struct socket *so; int error = 0; +#if defined(XNU_TARGET_OS_OSX) + pid_t rpid = -1; +#endif #if TCPDEBUG extern int tcpconsdebug; @@ -559,58 +654,116 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, VERIFY(aso != NULL); *aso = NULL; - if (proto != 0) + if (proto != 0) { prp = pffindproto(dom, proto, type); - else + } else { prp = pffindtype(dom, type); + } if (prp == NULL || prp->pr_usrreqs->pru_attach == NULL) { - if (pffinddomain(dom) == NULL) - return (EAFNOSUPPORT); + if (pffinddomain(dom) == NULL) { + return EAFNOSUPPORT; + } if (proto != 0) { - if (pffindprotonotype(dom, proto) != NULL) - return (EPROTOTYPE); + if (pffindprotonotype(dom, proto) != NULL) { + return EPROTOTYPE; + } } - return (EPROTONOSUPPORT); + return EPROTONOSUPPORT; + } + if (prp->pr_type != type) { + return EPROTOTYPE; } - if (prp->pr_type != type) - return (EPROTOTYPE); so = soalloc(1, dom, type); - if (so == NULL) - return (ENOBUFS); + if (so == NULL) { + return ENOBUFS; + } - if (flags & SOCF_ASYNC) + switch (dom) { + case PF_LOCAL: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_local_total); + break; + case PF_INET: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_inet_total); + if (type == SOCK_STREAM) { + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet_stream_total); + } else { + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet_dgram_total); + } + break; + case PF_ROUTE: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_route_total); + break; + case PF_NDRV: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_ndrv_total); + break; + case PF_KEY: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_key_total); + break; + case PF_INET6: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_inet6_total); + if (type == SOCK_STREAM) { + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet6_stream_total); + } else { + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet6_dgram_total); + } + break; + case PF_SYSTEM: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_system_total); + break; + case PF_MULTIPATH: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_multipath_total); + break; + default: + INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_domain_other_total); + break; + } + + if (flags & SOCF_MPTCP) { so->so_state |= SS_NBIO; -#if MULTIPATH - if (flags & SOCF_MP_SUBFLOW) { - /* - * A multipath subflow socket is used internally in the kernel, - * therefore it does not have a file desciptor associated by - * default. - */ - so->so_state |= SS_NOFDREF; - so->so_flags |= SOF_MP_SUBFLOW; } -#endif /* MULTIPATH */ TAILQ_INIT(&so->so_incomp); TAILQ_INIT(&so->so_comp); so->so_type = type; so->last_upid = proc_uniqueid(p); so->last_pid = proc_pid(p); - proc_getexecutableuuid(p, so->last_uuid, sizeof (so->last_uuid)); + proc_getexecutableuuid(p, so->last_uuid, sizeof(so->last_uuid)); proc_pidoriginatoruuid(so->so_vuuid, sizeof(so->so_vuuid)); if (ep != PROC_NULL && ep != p) { so->e_upid = proc_uniqueid(ep); so->e_pid = proc_pid(ep); - proc_getexecutableuuid(ep, so->e_uuid, sizeof (so->e_uuid)); + proc_getexecutableuuid(ep, so->e_uuid, sizeof(so->e_uuid)); so->so_flags |= SOF_DELEGATED; +#if defined(XNU_TARGET_OS_OSX) + if (ep->p_responsible_pid != so->e_pid) { + rpid = ep->p_responsible_pid; + } +#endif + } + +#if defined(XNU_TARGET_OS_OSX) + if (rpid < 0 && p->p_responsible_pid != so->last_pid) { + rpid = p->p_responsible_pid; + } + + so->so_rpid = -1; + uuid_clear(so->so_ruuid); + if (rpid >= 0) { + proc_t rp = proc_find(rpid); + if (rp != PROC_NULL) { + proc_getexecutableuuid(rp, so->so_ruuid, sizeof(so->so_ruuid)); + so->so_rpid = rpid; + proc_rele(rp); + } } +#endif so->so_cred = kauth_cred_proc_ref(p); - if (!suser(kauth_cred_get(), NULL)) + if (!suser(kauth_cred_get(), NULL)) { so->so_state |= SS_PRIV; + } so->so_proto = prp; so->so_rcv.sb_flags |= SB_RECV; @@ -618,10 +771,6 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, so->next_lock_lr = 0; so->next_unlock_lr = 0; -#if CONFIG_MACF_SOCKET - mac_socket_label_associate(kauth_cred_get(), so); -#endif /* MAC_SOCKET */ - /* * Attachment will create the per pcb lock if necessary and * increase refcount for creation, make sure it's done before @@ -637,19 +786,27 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, * so protocol attachment handler must be coded carefuly */ so->so_state |= SS_NOFDREF; + VERIFY(so->so_usecount > 0); so->so_usecount--; - sofreelastref(so, 1); /* will deallocate the socket */ - return (error); + sofreelastref(so, 1); /* will deallocate the socket */ + return error; + } + + /* + * Note: needs so_pcb to be set after pru_attach + */ + if (prp->pr_update_last_owner != NULL) { + (*prp->pr_update_last_owner)(so, p, ep); } atomic_add_32(&prp->pr_domain->dom_refs, 1); - TAILQ_INIT(&so->so_evlist); /* Attach socket filters for this protocol */ sflt_initsock(so); #if TCPDEBUG - if (tcpconsdebug == 2) + if (tcpconsdebug == 2) { so->so_options |= SO_DEBUG; + } #endif so_set_default_traffic_class(so); @@ -657,19 +814,19 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, * If this thread or task is marked to create backgrounded sockets, * mark the socket as background. */ - if (proc_get_effective_thread_policy(current_thread(), TASK_POLICY_NEW_SOCKETS_BG)) { + if (!(flags & SOCF_MPTCP) && + proc_get_effective_thread_policy(current_thread(), TASK_POLICY_NEW_SOCKETS_BG)) { socket_set_traffic_mgt_flags(so, TRAFFIC_MGT_SO_BACKGROUND); so->so_background_thread = current_thread(); } switch (dom) { /* - * Don't mark Unix domain, system or multipath sockets as + * Don't mark Unix domain or system * eligible for defunct by default. */ case PF_LOCAL: case PF_SYSTEM: - case PF_MULTIPATH: so->so_flags |= SOF_NODEFUNCT; break; default: @@ -689,7 +846,7 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, *aso = so; - return (0); + return 0; } /* @@ -706,8 +863,8 @@ socreate_internal(int dom, struct socket **aso, int type, int proto, int socreate(int dom, struct socket **aso, int type, int proto) { - return (socreate_internal(dom, aso, type, proto, current_proc(), 0, - PROC_NULL)); + return socreate_internal(dom, aso, type, proto, current_proc(), 0, + PROC_NULL); } int @@ -728,10 +885,11 @@ socreate_delegate(int dom, struct socket **aso, int type, int proto, pid_t epid) * socreate_internal since it calls soalloc with M_WAITOK */ done: - if (ep != PROC_NULL) + if (ep != PROC_NULL) { proc_rele(ep); + } - return (error); + return error; } /* @@ -762,42 +920,46 @@ sobindlock(struct socket *so, struct sockaddr *nam, int dolock) struct proc *p = current_proc(); int error = 0; - if (dolock) + if (dolock) { socket_lock(so, 1); - VERIFY(so->so_usecount > 1); + } so_update_last_owner_locked(so, p); so_update_policy(so); - + #if NECP so_update_necp_policy(so, nam, NULL); #endif /* NECP */ - + /* * If this is a bind request on a socket that has been marked * as inactive, reject it now before we go any further. */ if (so->so_flags & SOF_DEFUNCT) { error = EINVAL; - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] (%d)\n", - __func__, proc_pid(p), (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] (%d)\n", + __func__, proc_pid(p), proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); goto out; } /* Socket filter */ error = sflt_bind(so, nam); - if (error == 0) + if (error == 0) { error = (*so->so_proto->pr_usrreqs->pru_bind)(so, nam, p); + } out: - if (dolock) + if (dolock) { socket_unlock(so, 1); + } - if (error == EJUSTRETURN) + if (error == EJUSTRETURN) { error = 0; + } - return (error); + return error; } void @@ -812,23 +974,12 @@ sodealloc(struct socket *so) cfil_sock_detach(so); #endif /* CONTENT_FILTER */ - /* Delete the state allocated for msg queues on a socket */ - if (so->so_flags & SOF_ENABLE_MSGS) { - FREE(so->so_msg_state, M_TEMP); - so->so_msg_state = NULL; - } - VERIFY(so->so_msg_state == NULL); - so->so_gencnt = OSIncrementAtomic64((SInt64 *)&so_gencnt); -#if CONFIG_MACF_SOCKET - mac_socket_label_destroy(so); -#endif /* MAC_SOCKET */ - - if (so->cached_in_sock_layer) { + if (so->so_flags1 & SOF1_CACHED_IN_SOCK_LAYER) { cached_sock_free(so); } else { - FREE_ZONE(so, sizeof (*so), so->so_zone); + zfree(socket_zone, so); } } @@ -861,11 +1012,11 @@ solisten(struct socket *so, int backlog) so_update_last_owner_locked(so, p); so_update_policy(so); - + #if NECP so_update_necp_policy(so, NULL, NULL); #endif /* NECP */ - + if (so->so_proto == NULL) { error = EINVAL; goto out; @@ -881,14 +1032,15 @@ solisten(struct socket *so, int backlog) * reject the request now. */ if ((so->so_state & - (SS_ISCONNECTED|SS_ISCONNECTING|SS_ISDISCONNECTING)) || + (SS_ISCONNECTED | SS_ISCONNECTING | SS_ISDISCONNECTING)) || (so->so_flags & SOF_DEFUNCT)) { error = EINVAL; if (so->so_flags & SOF_DEFUNCT) { - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] " + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] " "(%d)\n", __func__, proc_pid(p), - (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); + proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); } goto out; } @@ -899,17 +1051,20 @@ solisten(struct socket *so, int backlog) } error = sflt_listen(so); - if (error == 0) + if (error == 0) { error = (*so->so_proto->pr_usrreqs->pru_listen)(so, p); + } if (error) { - if (error == EJUSTRETURN) + if (error == EJUSTRETURN) { error = 0; + } goto out; } - if (TAILQ_EMPTY(&so->so_comp)) + if (TAILQ_EMPTY(&so->so_comp)) { so->so_options |= SO_ACCEPTCONN; + } /* * POSIX: The implementation may have an upper limit on the length of * the listen queue-either global or per accepting socket. If backlog @@ -924,13 +1079,83 @@ solisten(struct socket *so, int backlog) * in which case the length of the listen queue may be set to an * implementation-defined minimum value. */ - if (backlog <= 0 || backlog > somaxconn) + if (backlog <= 0 || backlog > somaxconn) { backlog = somaxconn; + } so->so_qlimit = backlog; out: socket_unlock(so, 1); - return (error); + return error; +} + +/* + * The "accept list lock" protects the fields related to the listener queues + * because we can unlock a socket to respect the lock ordering between + * the listener socket and its clients sockets. The lock ordering is first to + * acquire the client socket before the listener socket. + * + * The accept list lock serializes access to the following fields: + * - of the listener socket: + * - so_comp + * - so_incomp + * - so_qlen + * - so_inqlen + * - of client sockets that are in so_comp or so_incomp: + * - so_head + * - so_list + * + * As one can see the accept list lock protects the consistent of the + * linkage of the client sockets. + * + * Note that those fields may be read without holding the accept list lock + * for a preflight provided the accept list lock is taken when committing + * to take an action based on the result of the preflight. The preflight + * saves the cost of doing the unlock/lock dance. + */ +void +so_acquire_accept_list(struct socket *head, struct socket *so) +{ + lck_mtx_t *mutex_held; + + if (head->so_proto->pr_getlock == NULL) { + return; + } + mutex_held = (*head->so_proto->pr_getlock)(head, PR_F_WILLUNLOCK); + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); + + if (!(head->so_flags1 & SOF1_ACCEPT_LIST_HELD)) { + head->so_flags1 |= SOF1_ACCEPT_LIST_HELD; + return; + } + if (so != NULL) { + socket_unlock(so, 0); + } + while (head->so_flags1 & SOF1_ACCEPT_LIST_HELD) { + so_accept_list_waits += 1; + msleep((caddr_t)&head->so_incomp, mutex_held, + PSOCK | PCATCH, __func__, NULL); + } + head->so_flags1 |= SOF1_ACCEPT_LIST_HELD; + if (so != NULL) { + socket_unlock(head, 0); + socket_lock(so, 0); + socket_lock(head, 0); + } +} + +void +so_release_accept_list(struct socket *head) +{ + if (head->so_proto->pr_getlock != NULL) { + lck_mtx_t *mutex_held; + + mutex_held = (*head->so_proto->pr_getlock)(head, 0); + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); + + head->so_flags1 &= ~SOF1_ACCEPT_LIST_HELD; + wakeup((caddr_t)&head->so_incomp); + } } void @@ -943,17 +1168,36 @@ sofreelastref(struct socket *so, int dealloc) if (!(so->so_flags & SOF_PCBCLEARING) || !(so->so_state & SS_NOFDREF)) { selthreadclear(&so->so_snd.sb_sel); selthreadclear(&so->so_rcv.sb_sel); - so->so_rcv.sb_flags &= ~(SB_SEL|SB_UPCALL); - so->so_snd.sb_flags &= ~(SB_SEL|SB_UPCALL); + so->so_rcv.sb_flags &= ~(SB_SEL | SB_UPCALL); + so->so_snd.sb_flags &= ~(SB_SEL | SB_UPCALL); so->so_event = sonullevent; return; } if (head != NULL) { - socket_lock(head, 1); + /* + * Need to lock the listener when the protocol has + * per socket locks + */ + if (head->so_proto->pr_getlock != NULL) { + socket_lock(head, 1); + so_acquire_accept_list(head, so); + } if (so->so_state & SS_INCOMP) { + so->so_state &= ~SS_INCOMP; TAILQ_REMOVE(&head->so_incomp, so, so_list); head->so_incqlen--; + head->so_qlen--; + so->so_head = NULL; + + if (head->so_proto->pr_getlock != NULL) { + so_release_accept_list(head); + socket_unlock(head, 1); + } } else if (so->so_state & SS_COMP) { + if (head->so_proto->pr_getlock != NULL) { + so_release_accept_list(head); + socket_unlock(head, 1); + } /* * We must not decommission a socket that's * on the accept(2) queue. If we do, then @@ -962,18 +1206,17 @@ sofreelastref(struct socket *so, int dealloc) */ selthreadclear(&so->so_snd.sb_sel); selthreadclear(&so->so_rcv.sb_sel); - so->so_rcv.sb_flags &= ~(SB_SEL|SB_UPCALL); - so->so_snd.sb_flags &= ~(SB_SEL|SB_UPCALL); + so->so_rcv.sb_flags &= ~(SB_SEL | SB_UPCALL); + so->so_snd.sb_flags &= ~(SB_SEL | SB_UPCALL); so->so_event = sonullevent; - socket_unlock(head, 1); return; } else { - panic("sofree: not queued"); + if (head->so_proto->pr_getlock != NULL) { + so_release_accept_list(head); + socket_unlock(head, 1); + } + printf("sofree: not queued\n"); } - head->so_qlen--; - so->so_state &= ~SS_INCOMP; - so->so_head = NULL; - socket_unlock(head, 1); } sowflush(so); sorflush(so); @@ -982,15 +1225,16 @@ sofreelastref(struct socket *so, int dealloc) if (so->so_flags & SOF_FLOW_DIVERT) { flow_divert_detach(so); } -#endif /* FLOW_DIVERT */ +#endif /* FLOW_DIVERT */ /* 3932268: disable upcall */ so->so_rcv.sb_flags &= ~SB_UPCALL; - so->so_snd.sb_flags &= ~SB_UPCALL; + so->so_snd.sb_flags &= ~(SB_UPCALL | SB_SNDBYTE_CNT); so->so_event = sonullevent; - if (dealloc) + if (dealloc) { sodealloc(so); + } } void @@ -998,24 +1242,27 @@ soclose_wait_locked(struct socket *so) { lck_mtx_t *mutex_held; - if (so->so_proto->pr_getlock != NULL) - mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else + if (so->so_proto->pr_getlock != NULL) { + mutex_held = (*so->so_proto->pr_getlock)(so, PR_F_WILLUNLOCK); + } else { mutex_held = so->so_proto->pr_domain->dom_mtx; - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + } + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); /* * Double check here and return if there's no outstanding upcall; * otherwise proceed further only if SOF_UPCALLCLOSEWAIT is set. */ - if (!so->so_upcallusecount || !(so->so_flags & SOF_UPCALLCLOSEWAIT)) + if (!so->so_upcallusecount || !(so->so_flags & SOF_UPCALLCLOSEWAIT)) { return; + } so->so_rcv.sb_flags &= ~SB_UPCALL; so->so_snd.sb_flags &= ~SB_UPCALL; so->so_flags |= SOF_CLOSEWAIT; + (void) msleep((caddr_t)&so->so_upcallusecount, mutex_held, (PZERO - 1), "soclose_wait_locked", NULL); - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); so->so_flags &= ~SOF_CLOSEWAIT; } @@ -1028,7 +1275,6 @@ int soclose_locked(struct socket *so) { int error = 0; - lck_mtx_t *mutex_held; struct timespec ts; if (so->so_usecount == 0) { @@ -1038,8 +1284,9 @@ soclose_locked(struct socket *so) sflt_notify(so, sock_evt_closing, NULL); - if (so->so_upcallusecount) + if (so->so_upcallusecount) { soclose_wait_locked(so); + } #if CONTENT_FILTER /* @@ -1052,9 +1299,15 @@ soclose_locked(struct socket *so) } #endif /* CONTENT_FILTER */ + if (so->so_flags1 & SOF1_EXTEND_BK_IDLE_INPROG) { + soresume(current_proc(), so, 1); + so->so_flags1 &= ~SOF1_EXTEND_BK_IDLE_WANTED; + } + if ((so->so_options & SO_ACCEPTCONN)) { struct socket *sp, *sonext; - int socklock = 0; + int persocklock = 0; + int incomp_overflow_only; /* * We do not want new connection to be added @@ -1062,10 +1315,19 @@ soclose_locked(struct socket *so) */ so->so_options &= ~SO_ACCEPTCONN; - for (sp = TAILQ_FIRST(&so->so_incomp); - sp != NULL; sp = sonext) { - sonext = TAILQ_NEXT(sp, so_list); + /* + * We can drop the lock on the listener once + * we've acquired the incoming list + */ + if (so->so_proto->pr_getlock != NULL) { + persocklock = 1; + so_acquire_accept_list(so, NULL); + socket_unlock(so, 0); + } +again: + incomp_overflow_only = 1; + TAILQ_FOREACH_SAFE(sp, &so->so_incomp, so_list, sonext) { /* * Radar 5350314 * skip sockets thrown away by tcpdropdropblreq @@ -1073,57 +1335,81 @@ soclose_locked(struct socket *so) * otherwise, remove the incomp socket from the queue * and let soabort trigger the appropriate cleanup. */ - if (sp->so_flags & SOF_OVERFLOW) + if (sp->so_flags & SOF_OVERFLOW) { continue; + } - if (so->so_proto->pr_getlock != NULL) { - /* - * Lock ordering for consistency with the - * rest of the stack, we lock the socket - * first and then grabb the head. - */ - socket_unlock(so, 0); + if (persocklock != 0) { socket_lock(sp, 1); - socket_lock(so, 0); - socklock = 1; } - TAILQ_REMOVE(&so->so_incomp, sp, so_list); - so->so_incqlen--; - + /* + * Radar 27945981 + * The extra reference for the list insure the + * validity of the socket pointer when we perform the + * unlock of the head above + */ if (sp->so_state & SS_INCOMP) { sp->so_state &= ~SS_INCOMP; sp->so_head = NULL; + TAILQ_REMOVE(&so->so_incomp, sp, so_list); + so->so_incqlen--; + so->so_qlen--; (void) soabort(sp); + } else { + panic("%s sp %p in so_incomp but !SS_INCOMP", + __func__, sp); } - if (socklock) + if (persocklock != 0) { socket_unlock(sp, 1); + } } - while ((sp = TAILQ_FIRST(&so->so_comp)) != NULL) { + TAILQ_FOREACH_SAFE(sp, &so->so_comp, so_list, sonext) { /* Dequeue from so_comp since sofree() won't do it */ - TAILQ_REMOVE(&so->so_comp, sp, so_list); - so->so_qlen--; - - if (so->so_proto->pr_getlock != NULL) { - socket_unlock(so, 0); + if (persocklock != 0) { socket_lock(sp, 1); } if (sp->so_state & SS_COMP) { sp->so_state &= ~SS_COMP; sp->so_head = NULL; + TAILQ_REMOVE(&so->so_comp, sp, so_list); + so->so_qlen--; (void) soabort(sp); + } else { + panic("%s sp %p in so_comp but !SS_COMP", + __func__, sp); } - if (so->so_proto->pr_getlock != NULL) { + if (persocklock) { socket_unlock(sp, 1); - socket_lock(so, 0); } } + + if (incomp_overflow_only == 0 && !TAILQ_EMPTY(&so->so_incomp)) { +#if (DEBUG | DEVELOPMENT) + panic("%s head %p so_comp not empty\n", __func__, so); +#endif /* (DEVELOPMENT || DEBUG) */ + + goto again; + } + + if (!TAILQ_EMPTY(&so->so_comp)) { +#if (DEBUG | DEVELOPMENT) + panic("%s head %p so_comp not empty\n", __func__, so); +#endif /* (DEVELOPMENT || DEBUG) */ + + goto again; + } + + if (persocklock) { + socket_lock(so, 0); + so_release_accept_list(so); + } } if (so->so_pcb == NULL) { /* 3915887: mark the socket as ready for dealloc */ @@ -1133,19 +1419,24 @@ soclose_locked(struct socket *so) if (so->so_state & SS_ISCONNECTED) { if ((so->so_state & SS_ISDISCONNECTING) == 0) { error = sodisconnectlocked(so); - if (error) + if (error) { goto drop; + } } if (so->so_options & SO_LINGER) { + lck_mtx_t *mutex_held; + if ((so->so_state & SS_ISDISCONNECTING) && - (so->so_state & SS_NBIO)) + (so->so_state & SS_NBIO)) { goto drop; - if (so->so_proto->pr_getlock != NULL) - mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else + } + if (so->so_proto->pr_getlock != NULL) { + mutex_held = (*so->so_proto->pr_getlock)(so, PR_F_WILLUNLOCK); + } else { mutex_held = so->so_proto->pr_domain->dom_mtx; + } while (so->so_state & SS_ISCONNECTED) { - ts.tv_sec = (so->so_linger/100); + ts.tv_sec = (so->so_linger / 100); ts.tv_nsec = (so->so_linger % 100) * NSEC_PER_USEC * 1000 * 10; error = msleep((caddr_t)&so->so_timeo, @@ -1155,8 +1446,9 @@ soclose_locked(struct socket *so) * It's OK when the time fires, * don't report an error */ - if (error == EWOULDBLOCK) + if (error == EWOULDBLOCK) { error = 0; + } break; } } @@ -1169,8 +1461,9 @@ drop: } if (so->so_pcb != NULL && !(so->so_flags & SOF_PCBCLEARING)) { int error2 = (*so->so_proto->pr_usrreqs->pru_detach)(so); - if (error == 0) + if (error == 0) { error = error2; + } } if (so->so_usecount <= 0) { panic("soclose: usecount is zero so=%p\n", so); @@ -1184,18 +1477,16 @@ discard: } so->so_state |= SS_NOFDREF; - if (so->so_flags & SOF_MP_SUBFLOW) - so->so_flags &= ~SOF_MP_SUBFLOW; - - if ((so->so_flags & SOF_KNOTE) != 0) + if ((so->so_flags & SOF_KNOTE) != 0) { KNOTE(&so->so_klist, SO_FILT_HINT_LOCKED); + } atomic_add_32(&so->so_proto->pr_domain->dom_refs, -1); - evsofree(so); + VERIFY(so->so_usecount > 0); so->so_usecount--; sofree(so); - return (error); + return error; } int @@ -1212,12 +1503,13 @@ soclose(struct socket *so) * retained in kernel remove its reference */ so->so_usecount--; - if (so->so_usecount < 2) + if (so->so_usecount < 2) { panic("soclose: retaincnt non null and so=%p " "usecount=%d\n", so, so->so_usecount); + } } socket_unlock(so, 1); - return (error); + return error; } /* @@ -1232,11 +1524,12 @@ soabort(struct socket *so) #ifdef MORE_LOCKING_DEBUG lck_mtx_t *mutex_held; - if (so->so_proto->pr_getlock != NULL) + if (so->so_proto->pr_getlock != NULL) { mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else + } else { mutex_held = so->so_proto->pr_domain->dom_mtx; - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + } + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); #endif if ((so->so_flags & SOF_ABORTED) == 0) { @@ -1244,10 +1537,10 @@ soabort(struct socket *so) error = (*so->so_proto->pr_usrreqs->pru_abort)(so); if (error) { sofree(so); - return (error); + return error; } } - return (0); + return 0; } int @@ -1255,8 +1548,9 @@ soacceptlock(struct socket *so, struct sockaddr **nam, int dolock) { int error; - if (dolock) + if (dolock) { socket_lock(so, 1); + } so_update_last_owner_locked(so, PROC_NULL); so_update_policy(so); @@ -1264,28 +1558,29 @@ soacceptlock(struct socket *so, struct sockaddr **nam, int dolock) so_update_necp_policy(so, NULL, NULL); #endif /* NECP */ - if ((so->so_state & SS_NOFDREF) == 0) + if ((so->so_state & SS_NOFDREF) == 0) { panic("soaccept: !NOFDREF"); + } so->so_state &= ~SS_NOFDREF; error = (*so->so_proto->pr_usrreqs->pru_accept)(so, nam); - if (dolock) + if (dolock) { socket_unlock(so, 1); - return (error); + } + return error; } int soaccept(struct socket *so, struct sockaddr **nam) { - return (soacceptlock(so, nam, 1)); + return soacceptlock(so, nam, 1); } int -soacceptfilter(struct socket *so) +soacceptfilter(struct socket *so, struct socket *head) { struct sockaddr *local = NULL, *remote = NULL; int error = 0; - struct socket *head = so->so_head; /* * Hold the lock even if this socket has not been made visible @@ -1295,8 +1590,7 @@ soacceptfilter(struct socket *so) socket_lock(so, 1); if (sogetaddr_locked(so, &remote, 1) != 0 || sogetaddr_locked(so, &local, 0) != 0) { - so->so_state &= ~(SS_NOFDREF | SS_COMP); - so->so_head = NULL; + so->so_state &= ~SS_NOFDREF; socket_unlock(so, 1); soclose(so); /* Out of resources; try it again next time */ @@ -1324,8 +1618,7 @@ soacceptfilter(struct socket *so) * the following is done while holding the lock since * the socket has been exposed to the filter(s) earlier. */ - so->so_state &= ~(SS_NOFDREF | SS_COMP); - so->so_head = NULL; + so->so_state &= ~SS_NOFDREF; socket_unlock(so, 1); soclose(so); /* Propagate socket filter's error code to the caller */ @@ -1336,7 +1629,7 @@ done: /* Callee checks for NULL pointer */ sock_freeaddr(remote); sock_freeaddr(local); - return (error); + return error; } /* @@ -1358,8 +1651,9 @@ soconnectlock(struct socket *so, struct sockaddr *nam, int dolock) int error; struct proc *p = current_proc(); - if (dolock) + if (dolock) { socket_lock(so, 1); + } so_update_last_owner_locked(so, p); so_update_policy(so); @@ -1375,20 +1669,23 @@ soconnectlock(struct socket *so, struct sockaddr *nam, int dolock) if ((so->so_options & SO_ACCEPTCONN) || (so->so_flags & SOF_DEFUNCT)) { error = EOPNOTSUPP; if (so->so_flags & SOF_DEFUNCT) { - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] " + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] " "(%d)\n", __func__, proc_pid(p), - (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); + proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); } - if (dolock) + if (dolock) { socket_unlock(so, 1); - return (error); + } + return error; } if ((so->so_restrictions & SO_RESTRICT_DENY_OUT) != 0) { - if (dolock) + if (dolock) { socket_unlock(so, 1); - return (EPERM); + } + return EPERM; } /* @@ -1397,7 +1694,7 @@ soconnectlock(struct socket *so, struct sockaddr *nam, int dolock) * This allows user to disconnect by connecting to, e.g., * a null address. */ - if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) && + if (so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING) && ((so->so_proto->pr_flags & PR_CONNREQUIRED) || (error = sodisconnectlocked(so)))) { error = EISCONN; @@ -1408,22 +1705,27 @@ soconnectlock(struct socket *so, struct sockaddr *nam, int dolock) */ error = sflt_connectout(so, nam); if (error != 0) { - if (error == EJUSTRETURN) + if (error == EJUSTRETURN) { error = 0; + } } else { error = (*so->so_proto->pr_usrreqs->pru_connect) (so, nam, p); + if (error != 0) { + so->so_state &= ~SS_ISCONNECTING; + } } } - if (dolock) + if (dolock) { socket_unlock(so, 1); - return (error); + } + return error; } int soconnect(struct socket *so, struct sockaddr *nam) { - return (soconnectlock(so, nam, 1)); + return soconnectlock(so, nam, 1); } /* @@ -1440,28 +1742,30 @@ soconnect2(struct socket *so1, struct socket *so2) int error; socket_lock(so1, 1); - if (so2->so_proto->pr_lock) + if (so2->so_proto->pr_lock) { socket_lock(so2, 1); + } error = (*so1->so_proto->pr_usrreqs->pru_connect2)(so1, so2); socket_unlock(so1, 1); - if (so2->so_proto->pr_lock) + if (so2->so_proto->pr_lock) { socket_unlock(so2, 1); - return (error); + } + return error; } int -soconnectxlocked(struct socket *so, struct sockaddr_list **src_sl, - struct sockaddr_list **dst_sl, struct proc *p, uint32_t ifscope, - associd_t aid, connid_t *pcid, uint32_t flags, void *arg, - uint32_t arglen) +soconnectxlocked(struct socket *so, struct sockaddr *src, + struct sockaddr *dst, struct proc *p, uint32_t ifscope, + sae_associd_t aid, sae_connid_t *pcid, uint32_t flags, void *arg, + uint32_t arglen, uio_t auio, user_ssize_t *bytes_written) { int error; so_update_last_owner_locked(so, p); so_update_policy(so); - + /* * If this is a listening socket or if this is a previously-accepted * socket that has been marked as inactive, reject the connect request. @@ -1469,16 +1773,18 @@ soconnectxlocked(struct socket *so, struct sockaddr_list **src_sl, if ((so->so_options & SO_ACCEPTCONN) || (so->so_flags & SOF_DEFUNCT)) { error = EOPNOTSUPP; if (so->so_flags & SOF_DEFUNCT) { - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] " + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] " "(%d)\n", __func__, proc_pid(p), - (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); + proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); } - return (error); + return error; } - if ((so->so_restrictions & SO_RESTRICT_DENY_OUT) != 0) - return (EPERM); + if ((so->so_restrictions & SO_RESTRICT_DENY_OUT) != 0) { + return EPERM; + } /* * If protocol is connection-based, can only connect once @@ -1486,28 +1792,70 @@ soconnectxlocked(struct socket *so, struct sockaddr_list **src_sl, * try to disconnect first. This allows user to disconnect * by connecting to, e.g., a null address. */ - if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) && + if ((so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) && !(so->so_proto->pr_flags & PR_MULTICONN) && ((so->so_proto->pr_flags & PR_CONNREQUIRED) || (error = sodisconnectlocked(so)) != 0)) { error = EISCONN; } else { + if ((so->so_proto->pr_flags & PR_DATA_IDEMPOTENT) && + (flags & CONNECT_DATA_IDEMPOTENT)) { + so->so_flags1 |= SOF1_DATA_IDEMPOTENT; + + if (flags & CONNECT_DATA_AUTHENTICATED) { + so->so_flags1 |= SOF1_DATA_AUTHENTICATED; + } + } + + /* + * Case 1: CONNECT_RESUME_ON_READ_WRITE set, no data. + * Case 2: CONNECT_RESUME_ON_READ_WRITE set, with data (user error) + * Case 3: CONNECT_RESUME_ON_READ_WRITE not set, with data + * Case 3 allows user to combine write with connect even if they have + * no use for TFO (such as regular TCP, and UDP). + * Case 4: CONNECT_RESUME_ON_READ_WRITE not set, no data (regular case) + */ + if ((so->so_proto->pr_flags & PR_PRECONN_WRITE) && + ((flags & CONNECT_RESUME_ON_READ_WRITE) || auio)) { + so->so_flags1 |= SOF1_PRECONNECT_DATA; + } + + /* + * If a user sets data idempotent and does not pass an uio, or + * sets CONNECT_RESUME_ON_READ_WRITE, this is an error, reset + * SOF1_DATA_IDEMPOTENT. + */ + if (!(so->so_flags1 & SOF1_PRECONNECT_DATA) && + (so->so_flags1 & SOF1_DATA_IDEMPOTENT)) { + /* We should return EINVAL instead perhaps. */ + so->so_flags1 &= ~SOF1_DATA_IDEMPOTENT; + } + /* * Run connect filter before calling protocol: * - non-blocking connect returns before completion; */ - error = sflt_connectxout(so, dst_sl); + error = sflt_connectout(so, dst); if (error != 0) { - if (error == EJUSTRETURN) + /* Disable PRECONNECT_DATA, as we don't need to send a SYN anymore. */ + so->so_flags1 &= ~SOF1_PRECONNECT_DATA; + if (error == EJUSTRETURN) { error = 0; + } } else { error = (*so->so_proto->pr_usrreqs->pru_connectx) - (so, src_sl, dst_sl, p, ifscope, aid, pcid, - flags, arg, arglen); + (so, src, dst, p, ifscope, aid, pcid, + flags, arg, arglen, auio, bytes_written); + if (error != 0) { + so->so_state &= ~SS_ISCONNECTING; + if (error != EINPROGRESS) { + so->so_flags1 &= ~SOF1_PRECONNECT_DATA; + } + } } } - return (error); + return error; } int @@ -1525,11 +1873,12 @@ sodisconnectlocked(struct socket *so) } error = (*so->so_proto->pr_usrreqs->pru_disconnect)(so); - if (error == 0) + if (error == 0) { sflt_notify(so, sock_evt_disconnected, NULL); + } bad: - return (error); + return error; } /* Locking version */ @@ -1541,11 +1890,11 @@ sodisconnect(struct socket *so) socket_lock(so, 1); error = sodisconnectlocked(so); socket_unlock(so, 1); - return (error); + return error; } int -sodisconnectxlocked(struct socket *so, associd_t aid, connid_t cid) +sodisconnectxlocked(struct socket *so, sae_associd_t aid, sae_connid_t cid) { int error; @@ -1559,30 +1908,25 @@ sodisconnectxlocked(struct socket *so, associd_t aid, connid_t cid) * The event applies only for the session, not for * the disconnection of individual subflows. */ - if (so->so_state & (SS_ISDISCONNECTING|SS_ISDISCONNECTED)) + if (so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) { sflt_notify(so, sock_evt_disconnected, NULL); + } } - return (error); + return error; } int -sodisconnectx(struct socket *so, associd_t aid, connid_t cid) +sodisconnectx(struct socket *so, sae_associd_t aid, sae_connid_t cid) { int error; socket_lock(so, 1); error = sodisconnectxlocked(so, aid, cid); socket_unlock(so, 1); - return (error); -} - -int -sopeelofflocked(struct socket *so, associd_t aid, struct socket **psop) -{ - return ((*so->so_proto->pr_usrreqs->pru_peeloff)(so, aid, psop)); + return error; } -#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? 0 : SBL_WAIT) +#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? 0 : SBL_WAIT) /* * sosendcheck will lock the socket buffer if it isn't locked and @@ -1598,12 +1942,11 @@ sopeelofflocked(struct socket *so, associd_t aid, struct socket **psop) */ int sosendcheck(struct socket *so, struct sockaddr *addr, user_ssize_t resid, - int32_t clen, int32_t atomic, int flags, int *sblocked, - struct mbuf *control) + int32_t clen, int32_t atomic, int flags, int *sblocked) { - int error = 0; + int error = 0; int32_t space; - int assumelock = 0; + int assumelock = 0; restart: if (*sblocked == 0) { @@ -1620,9 +1963,10 @@ restart: } else { error = sblock(&so->so_snd, SBLOCKWAIT(flags)); if (error) { - if (so->so_flags & SOF_DEFUNCT) + if (so->so_flags & SOF_DEFUNCT) { goto defunct; - return (error); + } + return error; } *sblocked = 1; } @@ -1635,10 +1979,11 @@ restart: if (so->so_flags & SOF_DEFUNCT) { defunct: error = EPIPE; - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] (%d)\n", - __func__, proc_selfpid(), (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); - return (error); + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] (%d)\n", + __func__, proc_selfpid(), proc_best_name(current_proc()), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); + return error; } if (so->so_state & SS_CANTSENDMORE) { @@ -1647,70 +1992,76 @@ defunct: * Can re-inject data of half closed connections */ if ((so->so_state & SS_ISDISCONNECTED) == 0 && - so->so_snd.sb_cfil_thread == current_thread() && - cfil_sock_data_pending(&so->so_snd) != 0) + so->so_snd.sb_cfil_thread == current_thread() && + cfil_sock_data_pending(&so->so_snd) != 0) { CFIL_LOG(LOG_INFO, - "so %llx ignore SS_CANTSENDMORE", - (uint64_t)VM_KERNEL_ADDRPERM(so)); - else + "so %llx ignore SS_CANTSENDMORE", + (uint64_t)DEBUG_KERNEL_ADDRPERM(so)); + } else #endif /* CONTENT_FILTER */ - return (EPIPE); + return EPIPE; } if (so->so_error) { error = so->so_error; so->so_error = 0; - return (error); + return error; } if ((so->so_state & SS_ISCONNECTED) == 0) { if ((so->so_proto->pr_flags & PR_CONNREQUIRED) != 0) { if (((so->so_state & SS_ISCONFIRMING) == 0) && - (resid != 0 || clen == 0)) { -#if MPTCP - /* - * MPTCP Fast Join sends data before the - * socket is truly connected. - */ - if ((so->so_flags & (SOF_MP_SUBFLOW | - SOF_MPTCP_FASTJOIN)) != - (SOF_MP_SUBFLOW | SOF_MPTCP_FASTJOIN)) -#endif /* MPTCP */ - return (ENOTCONN); + (resid != 0 || clen == 0) && + !(so->so_flags1 & SOF1_PRECONNECT_DATA)) { + return ENOTCONN; } - } else if (addr == 0 && !(flags&MSG_HOLD)) { - return ((so->so_proto->pr_flags & PR_CONNREQUIRED) ? - ENOTCONN : EDESTADDRREQ); + } else if (addr == 0) { + return (so->so_proto->pr_flags & PR_CONNREQUIRED) ? + ENOTCONN : EDESTADDRREQ; } } - if (so->so_flags & SOF_ENABLE_MSGS) - space = msgq_sbspace(so, control); - else - space = sbspace(&so->so_snd); - if (flags & MSG_OOB) + space = sbspace(&so->so_snd); + + if (flags & MSG_OOB) { space += 1024; + } if ((atomic && resid > so->so_snd.sb_hiwat) || - clen > so->so_snd.sb_hiwat) - return (EMSGSIZE); + clen > so->so_snd.sb_hiwat) { + return EMSGSIZE; + } if ((space < resid + clen && - (atomic || space < (int32_t)so->so_snd.sb_lowat || space < clen)) || + (atomic || (space < (int32_t)so->so_snd.sb_lowat) || + space < clen)) || (so->so_type == SOCK_STREAM && so_wait_for_if_feedback(so))) { + /* + * don't block the connectx call when there's more data + * than can be copied. + */ + if (so->so_flags1 & SOF1_PRECONNECT_DATA) { + if (space == 0) { + return EWOULDBLOCK; + } + if (space < (int32_t)so->so_snd.sb_lowat) { + return 0; + } + } if ((so->so_state & SS_NBIO) || (flags & MSG_NBIO) || assumelock) { - return (EWOULDBLOCK); + return EWOULDBLOCK; } - sbunlock(&so->so_snd, TRUE); /* keep socket locked */ + sbunlock(&so->so_snd, TRUE); /* keep socket locked */ *sblocked = 0; error = sbwait(&so->so_snd); if (error) { - if (so->so_flags & SOF_DEFUNCT) + if (so->so_flags & SOF_DEFUNCT) { goto defunct; - return (error); + } + return error; } goto restart; } - return (0); + return 0; } /* @@ -1729,10 +2080,6 @@ defunct: * Returns nonzero on error, timeout or signal; callers * must check for short counts if EINTR/ERESTART are returned. * Data and control buffers are freed on return. - * Experiment: - * MSG_HOLD: go thru most of sosend(), but just enqueue the mbuf - * MSG_SEND: go thru as for MSG_HOLD on current fragment, then - * point at the mbuf chain being constructed and go from there. * * Returns: 0 Success * EOPNOTSUPP @@ -1779,39 +2126,58 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, { struct mbuf **mp; struct mbuf *m, *freelist = NULL; - user_ssize_t space, len, resid; + user_ssize_t space, len, resid, orig_resid; int clen = 0, error, dontroute, mlen, sendflags; int atomic = sosendallatonce(so) || top; int sblocked = 0; struct proc *p = current_proc(); - struct mbuf *control_copy = NULL; + uint16_t headroom = 0; + boolean_t en_tracing = FALSE; - if (uio != NULL) + if (uio != NULL) { resid = uio_resid(uio); - else + } else { resid = top->m_pkthdr.len; + } KERNEL_DEBUG((DBG_FNC_SOSEND | DBG_FUNC_START), so, resid, so->so_snd.sb_cc, so->so_snd.sb_lowat, so->so_snd.sb_hiwat); socket_lock(so, 1); + /* + * trace if tracing & network (vs. unix) sockets & and + * non-loopback + */ + if (ENTR_SHOULDTRACE && + (SOCK_CHECK_DOM(so, AF_INET) || SOCK_CHECK_DOM(so, AF_INET6))) { + struct inpcb *inp = sotoinpcb(so); + if (inp->inp_last_outifp != NULL && + !(inp->inp_last_outifp->if_flags & IFF_LOOPBACK)) { + en_tracing = TRUE; + KERNEL_ENERGYTRACE(kEnTrActKernSockWrite, DBG_FUNC_START, + VM_KERNEL_ADDRPERM(so), + ((so->so_state & SS_NBIO) ? kEnTrFlagNonBlocking : 0), + (int64_t)resid); + orig_resid = resid; + } + } + /* * Re-injection should not affect process accounting */ if ((flags & MSG_SKIPCFIL) == 0) { - so_update_last_owner_locked(so, p); - so_update_policy(so); - + so_update_last_owner_locked(so, p); + so_update_policy(so); + #if NECP - so_update_necp_policy(so, NULL, addr); + so_update_necp_policy(so, NULL, addr); #endif /* NECP */ } - + if (so->so_type != SOCK_STREAM && (flags & MSG_OOB) != 0) { error = EOPNOTSUPP; - socket_unlock(so, 1); - goto out; + goto out_locked; } /* @@ -1822,16 +2188,14 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, * causes us to loop sending 0-length segments to the protocol. * * Usually, MSG_EOR isn't used on SOCK_STREAM type sockets. - * But it will be used by sockets doing message delivery. * * Note: We limit resid to be a positive int value as we use * imin() to set bytes_to_copy -- radr://14558484 */ - if (resid < 0 || resid > INT_MAX || (so->so_type == SOCK_STREAM && - !(so->so_flags & SOF_ENABLE_MSGS) && (flags & MSG_EOR))) { + if (resid < 0 || resid > INT_MAX || + (so->so_type == SOCK_STREAM && (flags & MSG_EOR))) { error = EINVAL; - socket_unlock(so, 1); - goto out; + goto out_locked; } dontroute = (flags & MSG_DONTROUTE) && @@ -1839,20 +2203,23 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, (so->so_proto->pr_flags & PR_ATOMIC); OSIncrementAtomicLong(&p->p_stats->p_ru.ru_msgsnd); - if (control != NULL) + if (control != NULL) { clen = control->m_len; + } + + if (soreserveheadroom != 0) { + headroom = so->so_pktheadroom; + } do { error = sosendcheck(so, addr, resid, clen, atomic, flags, - &sblocked, control); - if (error) - goto release; + &sblocked); + if (error) { + goto out_locked; + } mp = ⊤ - if (so->so_flags & SOF_ENABLE_MSGS) - space = msgq_sbspace(so, control); - else - space = sbspace(&so->so_snd) - clen; + space = sbspace(&so->so_snd) - clen; space += ((flags & MSG_OOB) ? 1024 : 0); do { @@ -1861,29 +2228,36 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, * Data is prepackaged in "top". */ resid = 0; - if (flags & MSG_EOR) + if (flags & MSG_EOR) { top->m_flags |= M_EOR; + } } else { int chainlength; int bytes_to_copy; boolean_t jumbocl; boolean_t bigcl; + int bytes_to_alloc; bytes_to_copy = imin(resid, space); - if (sosendminchain > 0) + bytes_to_alloc = bytes_to_copy; + if (top == NULL) { + bytes_to_alloc += headroom; + } + + if (sosendminchain > 0) { chainlength = 0; - else + } else { chainlength = sosendmaxchain; + } /* - * Use big 4 KB cluster only when outgoing - * interface does not want 2 LB clusters + * Use big 4 KB cluster when the outgoing interface + * does not prefer 2 KB clusters */ - bigcl = - !(so->so_flags1 & SOF1_IF_2KCL) || + bigcl = !(so->so_flags1 & SOF1_IF_2KCL) || sosendbigcl_ignore_capab; - + /* * Attempt to use larger than system page-size * clusters for large writes only if there is @@ -1917,21 +2291,22 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, * haven't yet consumed. */ if (freelist == NULL && - bytes_to_copy > MBIGCLBYTES && + bytes_to_alloc > MBIGCLBYTES && jumbocl) { num_needed = - bytes_to_copy / M16KCLBYTES; + bytes_to_alloc / M16KCLBYTES; - if ((bytes_to_copy - + if ((bytes_to_alloc - (num_needed * M16KCLBYTES)) - >= MINCLSIZE) + >= MINCLSIZE) { num_needed++; + } freelist = m_getpackets_internal( - (unsigned int *)&num_needed, - hdrs_needed, M_WAIT, 0, - M16KCLBYTES); + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + M16KCLBYTES); /* * Fall back to 4K cluster size * if allocation failed @@ -1939,60 +2314,100 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, } if (freelist == NULL && - bytes_to_copy > MCLBYTES && + bytes_to_alloc > MCLBYTES && bigcl) { num_needed = - bytes_to_copy / MBIGCLBYTES; + bytes_to_alloc / MBIGCLBYTES; - if ((bytes_to_copy - + if ((bytes_to_alloc - (num_needed * MBIGCLBYTES)) >= - MINCLSIZE) + MINCLSIZE) { num_needed++; + } freelist = m_getpackets_internal( - (unsigned int *)&num_needed, - hdrs_needed, M_WAIT, 0, - MBIGCLBYTES); + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + MBIGCLBYTES); /* * Fall back to cluster size * if allocation failed */ } - if (freelist == NULL && - bytes_to_copy > MINCLSIZE) { + /* + * Allocate a cluster as we want to + * avoid to split the data in more + * that one segment and using MINCLSIZE + * would lead us to allocate two mbufs + */ + if (soreserveheadroom != 0 && + freelist == NULL && + ((top == NULL && + bytes_to_alloc > _MHLEN) || + bytes_to_alloc > _MLEN)) { + num_needed = ROUNDUP(bytes_to_alloc, MCLBYTES) / + MCLBYTES; + freelist = + m_getpackets_internal( + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + MCLBYTES); + /* + * Fall back to a single mbuf + * if allocation failed + */ + } else if (freelist == NULL && + bytes_to_alloc > MINCLSIZE) { num_needed = - bytes_to_copy / MCLBYTES; + bytes_to_alloc / MCLBYTES; - if ((bytes_to_copy - + if ((bytes_to_alloc - (num_needed * MCLBYTES)) >= - MINCLSIZE) + MINCLSIZE) { num_needed++; + } freelist = m_getpackets_internal( - (unsigned int *)&num_needed, - hdrs_needed, M_WAIT, 0, - MCLBYTES); + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + MCLBYTES); /* * Fall back to a single mbuf * if allocation failed */ } + /* + * For datagram protocols, leave + * headroom for protocol headers + * in the first cluster of the chain + */ + if (freelist != NULL && atomic && + top == NULL && headroom > 0) { + freelist->m_data += headroom; + } + /* + * Fall back to regular mbufs without + * reserving the socket headroom + */ if (freelist == NULL) { - if (top == NULL) - MGETHDR(freelist, - M_WAIT, MT_DATA); - else - MGET(freelist, - M_WAIT, MT_DATA); + if (SOCK_TYPE(so) != SOCK_STREAM || bytes_to_alloc <= MINCLSIZE) { + if (top == NULL) { + MGETHDR(freelist, + M_WAIT, MT_DATA); + } else { + MGET(freelist, + M_WAIT, MT_DATA); + } + } if (freelist == NULL) { error = ENOBUFS; socket_lock(so, 0); - goto release; + goto out_locked; } /* * For datagram protocols, @@ -2009,13 +2424,15 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, freelist = m->m_next; m->m_next = NULL; - if ((m->m_flags & M_EXT)) - mlen = m->m_ext.ext_size; - else if ((m->m_flags & M_PKTHDR)) + if ((m->m_flags & M_EXT)) { + mlen = m->m_ext.ext_size - + M_LEADINGSPACE(m); + } else if ((m->m_flags & M_PKTHDR)) { mlen = - MHLEN - m_leadingspace(m); - else - mlen = MLEN; + MHLEN - M_LEADINGSPACE(m); + } else { + mlen = MLEN - M_LEADINGSPACE(m); + } len = imin(mlen, bytes_to_copy); chainlength += len; @@ -2030,63 +2447,46 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, m->m_len = len; *mp = m; top->m_pkthdr.len += len; - if (error) + if (error) { break; + } mp = &m->m_next; if (resid <= 0) { - if (flags & MSG_EOR) + if (flags & MSG_EOR) { top->m_flags |= M_EOR; + } break; } bytes_to_copy = min(resid, space); - } while (space > 0 && (chainlength < sosendmaxchain || atomic || resid < MINCLSIZE)); socket_lock(so, 0); - if (error) - goto release; - } - - if (flags & (MSG_HOLD|MSG_SEND)) { - /* Enqueue for later, go away if HOLD */ - struct mbuf *mb1; - if (so->so_temp && (flags & MSG_FLUSH)) { - m_freem(so->so_temp); - so->so_temp = NULL; - } - if (so->so_temp) - so->so_tail->m_next = top; - else - so->so_temp = top; - mb1 = top; - while (mb1->m_next) - mb1 = mb1->m_next; - so->so_tail = mb1; - if (flags & MSG_HOLD) { - top = NULL; - goto release; + if (error) { + goto out_locked; } - top = so->so_temp; } - if (dontroute) + + if (dontroute) { so->so_options |= SO_DONTROUTE; + } - /* Compute flags here, for pru_send and NKEs */ + /* + * Compute flags here, for pru_send and NKEs + * + * If the user set MSG_EOF, the protocol + * understands this flag and nothing left to + * send then use PRU_SEND_EOF instead of PRU_SEND. + */ sendflags = (flags & MSG_OOB) ? PRUS_OOB : - /* - * If the user set MSG_EOF, the protocol - * understands this flag and nothing left to - * send then use PRU_SEND_EOF instead of PRU_SEND. - */ ((flags & MSG_EOF) && - (so->so_proto->pr_flags & PR_IMPLOPCL) && - (resid <= 0)) ? PRUS_EOF : - /* If there is more to send set PRUS_MORETOCOME */ - (resid > 0 && space > 0) ? PRUS_MORETOCOME : 0; - + (so->so_proto->pr_flags & PR_IMPLOPCL) && + (resid <= 0)) ? PRUS_EOF : + /* If there is more to send set PRUS_MORETOCOME */ + (resid > 0 && space > 0) ? PRUS_MORETOCOME : 0; + if ((flags & MSG_SKIPCFIL) == 0) { /* * Socket filter processing @@ -2101,86 +2501,137 @@ sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, control = NULL; top = NULL; } - goto release; + goto out_locked; } #if CONTENT_FILTER /* * Content filter processing */ error = cfil_sock_data_out(so, addr, top, - control, (sendflags & MSG_OOB) ? - sock_data_filt_flag_oob : 0); + control, sendflags); if (error) { if (error == EJUSTRETURN) { error = 0; clen = 0; control = NULL; top = NULL; - } - goto release; + } + goto out_locked; } #endif /* CONTENT_FILTER */ } - if (so->so_flags & SOF_ENABLE_MSGS) { - /* - * Make a copy of control mbuf, - * so that msg priority can be - * passed to subsequent mbufs. - */ - control_copy = m_dup(control, M_NOWAIT); - } error = (*so->so_proto->pr_usrreqs->pru_send) (so, sendflags, top, addr, control, p); - if (flags & MSG_SEND) - so->so_temp = NULL; - - if (dontroute) + if (dontroute) { so->so_options &= ~SO_DONTROUTE; + } clen = 0; - control = control_copy; - control_copy = NULL; + control = NULL; top = NULL; mp = ⊤ - if (error) - goto release; + if (error) { + goto out_locked; + } } while (resid && space > 0); } while (resid); -release: - if (sblocked) - sbunlock(&so->so_snd, FALSE); /* will unlock socket */ - else +out_locked: + if (sblocked) { + sbunlock(&so->so_snd, FALSE); /* will unlock socket */ + } else { socket_unlock(so, 1); -out: - if (top != NULL) + } + if (top != NULL) { m_freem(top); - if (control != NULL) + } + if (control != NULL) { m_freem(control); - if (freelist != NULL) + } + if (freelist != NULL) { m_freem_list(freelist); - if (control_copy != NULL) - m_freem(control_copy); + } + + soclearfastopen(so); + + if (en_tracing) { + /* resid passed here is the bytes left in uio */ + KERNEL_ENERGYTRACE(kEnTrActKernSockWrite, DBG_FUNC_END, + VM_KERNEL_ADDRPERM(so), + ((error == EWOULDBLOCK) ? kEnTrFlagNoWork : 0), + (int64_t)(orig_resid - resid)); + } + KERNEL_DEBUG(DBG_FNC_SOSEND | DBG_FUNC_END, so, resid, + so->so_snd.sb_cc, space, error); + + return error; +} + +int +sosend_reinject(struct socket *so, struct sockaddr *addr, struct mbuf *top, struct mbuf *control, uint32_t sendflags) +{ + struct mbuf *m0 = NULL, *control_end = NULL; + + socket_lock_assert_owned(so); + + /* + * top must points to mbuf chain to be sent. + * If control is not NULL, top must be packet header + */ + VERIFY(top != NULL && + (control == NULL || top->m_flags & M_PKTHDR)); - KERNEL_DEBUG(DBG_FNC_SOSEND | DBG_FUNC_END, so, resid, so->so_snd.sb_cc, - space, error); + /* + * If control is not passed in, see if we can get it + * from top. + */ + if (control == NULL && (top->m_flags & M_PKTHDR) == 0) { + // Locate start of control if present and start of data + for (m0 = top; m0 != NULL; m0 = m0->m_next) { + if (m0->m_flags & M_PKTHDR) { + top = m0; + break; + } else if (m0->m_type == MT_CONTROL) { + if (control == NULL) { + // Found start of control + control = m0; + } + if (control != NULL && m0->m_next != NULL && m0->m_next->m_type != MT_CONTROL) { + // Found end of control + control_end = m0; + } + } + } + if (control_end != NULL) { + control_end->m_next = NULL; + } + } + + int error = (*so->so_proto->pr_usrreqs->pru_send) + (so, sendflags, top, addr, control, current_proc()); - return (error); + return error; } +/* + * Supported only connected sockets (no address) without ancillary data + * (control mbuf) for atomic protocols + */ int -sosend_list(struct socket *so, struct sockaddr *addr, struct uio **uioarray, - u_int uiocnt, struct mbuf *top, struct mbuf *control, int flags) +sosend_list(struct socket *so, struct uio **uioarray, u_int uiocnt, int flags) { struct mbuf *m, *freelist = NULL; user_ssize_t len, resid; - int clen = 0, error, dontroute, mlen; - int atomic = sosendallatonce(so) || top; + int error, dontroute, mlen; + int atomic = sosendallatonce(so); int sblocked = 0; struct proc *p = current_proc(); u_int uiofirst = 0; u_int uiolast = 0; + struct mbuf *top = NULL; + uint16_t headroom = 0; + boolean_t bigcl; KERNEL_DEBUG((DBG_FNC_SOSEND_LIST | DBG_FUNC_START), so, uiocnt, so->so_snd.sb_cc, so->so_snd.sb_lowat, so->so_snd.sb_hiwat); @@ -2201,10 +2652,7 @@ sosend_list(struct socket *so, struct sockaddr *addr, struct uio **uioarray, error = EINVAL; goto out; } - if (uioarray != NULL) - resid = uio_array_resid(uioarray, uiocnt); - else - resid = mbuf_pkt_list_len(top); + resid = uio_array_resid(uioarray, uiocnt); /* * In theory resid should be unsigned. @@ -2220,166 +2668,197 @@ sosend_list(struct socket *so, struct sockaddr *addr, struct uio **uioarray, error = EINVAL; goto out; } - /* - * Disallow functionality not currently supported - * Note: Will need to treat arrays of addresses and controls - */ - if (addr != NULL) { - printf("%s addr not supported\n", __func__); - error = EOPNOTSUPP; - goto out; - } - if (control != NULL) { - printf("%s control not supported\n", __func__); - error = EOPNOTSUPP; - goto out; - } socket_lock(so, 1); so_update_last_owner_locked(so, p); so_update_policy(so); - + #if NECP - so_update_necp_policy(so, NULL, addr); + so_update_necp_policy(so, NULL, NULL); #endif /* NECP */ - + dontroute = (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 && (so->so_proto->pr_flags & PR_ATOMIC); OSIncrementAtomicLong(&p->p_stats->p_ru.ru_msgsnd); - if (control != NULL) - clen = control->m_len; - - error = sosendcheck(so, addr, resid, clen, atomic, flags, - &sblocked, control); - if (error) + error = sosendcheck(so, NULL, resid, 0, atomic, flags, &sblocked); + if (error) { goto release; + } + + /* + * Use big 4 KB clusters when the outgoing interface does not prefer + * 2 KB clusters + */ + bigcl = !(so->so_flags1 & SOF1_IF_2KCL) || sosendbigcl_ignore_capab; + + if (soreserveheadroom != 0) { + headroom = so->so_pktheadroom; + } do { int i; + int num_needed = 0; + int chainlength; + size_t maxpktlen = 0; + int bytes_to_alloc; - if (uioarray == NULL) { - /* - * Data is prepackaged in "top". - */ - resid = 0; + if (sosendminchain > 0) { + chainlength = 0; } else { - int num_needed = 0; - int chainlength; - size_t maxpktlen = 0; - - if (sosendminchain > 0) - chainlength = 0; - else - chainlength = sosendmaxchain; + chainlength = sosendmaxchain; + } - socket_unlock(so, 0); + socket_unlock(so, 0); - /* - * Find a set of uio that fit in a reasonable number - * of mbuf packets - */ - for (i = uiofirst; i < uiocnt; i++) { - struct uio *auio = uioarray[i]; + /* + * Find a set of uio that fit in a reasonable number + * of mbuf packets + */ + for (i = uiofirst; i < uiocnt; i++) { + struct uio *auio = uioarray[i]; - len = uio_resid(auio); + len = uio_resid(auio); - /* Do nothing for empty messages */ - if (len == 0) - continue; + /* Do nothing for empty messages */ + if (len == 0) { + continue; + } - num_needed += 1; - uiolast += 1; - - if (len > maxpktlen) - maxpktlen = len; + num_needed += 1; + uiolast += 1; - chainlength += len; - if (chainlength > sosendmaxchain) - break; + if (len > maxpktlen) { + maxpktlen = len; } - /* - * Nothing left to send - */ - if (num_needed == 0) { - socket_lock(so, 0); + + chainlength += len; + if (chainlength > sosendmaxchain) { break; } - /* - * Allocate the mbuf packets at once - */ + } + /* + * Nothing left to send + */ + if (num_needed == 0) { + socket_lock(so, 0); + break; + } + /* + * Allocate buffer large enough to include headroom space for + * network and link header + * + */ + bytes_to_alloc = maxpktlen + headroom; + + /* + * Allocate a single contiguous buffer of the smallest available + * size when possible + */ + if (bytes_to_alloc > MCLBYTES && + bytes_to_alloc <= MBIGCLBYTES && bigcl) { + freelist = m_getpackets_internal( + (unsigned int *)&num_needed, + num_needed, M_WAIT, 1, + MBIGCLBYTES); + } else if (bytes_to_alloc > _MHLEN && + bytes_to_alloc <= MCLBYTES) { + freelist = m_getpackets_internal( + (unsigned int *)&num_needed, + num_needed, M_WAIT, 1, + MCLBYTES); + } else { freelist = m_allocpacket_internal( - (unsigned int *)&num_needed, - maxpktlen, NULL, M_WAIT, 1, 0); + (unsigned int *)&num_needed, + bytes_to_alloc, NULL, M_WAIT, 1, 0); + } - if (freelist == NULL) { - socket_lock(so, 0); - error = ENOMEM; - goto release; + if (freelist == NULL) { + socket_lock(so, 0); + error = ENOMEM; + goto release; + } + /* + * Copy each uio of the set into its own mbuf packet + */ + for (i = uiofirst, m = freelist; + i < uiolast && m != NULL; + i++) { + int bytes_to_copy; + struct mbuf *n; + struct uio *auio = uioarray[i]; + + bytes_to_copy = uio_resid(auio); + + /* Do nothing for empty messages */ + if (bytes_to_copy == 0) { + continue; } /* - * Copy each uio of the set into its own mbuf packet + * Leave headroom for protocol headers + * in the first mbuf of the chain */ - for (i = uiofirst, m = freelist; - i < uiolast && m != NULL; - i++) { - int bytes_to_copy; - struct mbuf *n; - struct uio *auio = uioarray[i]; - - bytes_to_copy = uio_resid(auio); - - /* Do nothing for empty messages */ - if (bytes_to_copy == 0) - continue; - - for (n = m; n != NULL; n = n->m_next) { - mlen = mbuf_maxlen(n); + m->m_data += headroom; + + for (n = m; n != NULL; n = n->m_next) { + if ((m->m_flags & M_EXT)) { + mlen = m->m_ext.ext_size - + M_LEADINGSPACE(m); + } else if ((m->m_flags & M_PKTHDR)) { + mlen = + MHLEN - M_LEADINGSPACE(m); + } else { + mlen = MLEN - M_LEADINGSPACE(m); + } + len = imin(mlen, bytes_to_copy); - len = imin(mlen, bytes_to_copy); + /* + * Note: uiomove() decrements the iovec + * length + */ + error = uiomove(mtod(n, caddr_t), + len, auio); + if (error != 0) { + break; + } + n->m_len = len; + m->m_pkthdr.len += len; - /* - * Note: uiomove() decrements the iovec - * length - */ - error = uiomove(mtod(n, caddr_t), - len, auio); - if (error != 0) - break; - n->m_len = len; - m->m_pkthdr.len += len; + VERIFY(m->m_pkthdr.len <= maxpktlen); - VERIFY(m->m_pkthdr.len <= maxpktlen); - - bytes_to_copy -= len; - resid -= len; - } - if (m->m_pkthdr.len == 0) { - printf("%s so %llx pkt %llx len null\n", - __func__, - (uint64_t)VM_KERNEL_ADDRPERM(so), - (uint64_t)VM_KERNEL_ADDRPERM(m)); - } - if (error != 0) - break; - m = m->m_nextpkt; + bytes_to_copy -= len; + resid -= len; + } + if (m->m_pkthdr.len == 0) { + printf( + "%s:%d so %llx pkt %llx type %u len null\n", + __func__, __LINE__, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + (uint64_t)DEBUG_KERNEL_ADDRPERM(m), + m->m_type); + } + if (error != 0) { + break; } + m = m->m_nextpkt; + } - socket_lock(so, 0); + socket_lock(so, 0); - if (error) - goto release; - top = freelist; - freelist = NULL; + if (error) { + goto release; } + top = freelist; + freelist = NULL; - if (dontroute) + if (dontroute) { so->so_options |= SO_DONTROUTE; + } if ((flags & MSG_SKIPCFIL) == 0) { struct mbuf **prevnextp = NULL; - + for (i = uiofirst, m = top; i < uiolast && m != NULL; i++) { @@ -2388,20 +2867,22 @@ sosend_list(struct socket *so, struct sockaddr *addr, struct uio **uioarray, /* * Socket filter processing */ - error = sflt_data_out(so, addr, &m, - &control, 0); - if (error != 0 && error != EJUSTRETURN) + error = sflt_data_out(so, NULL, &m, + NULL, 0); + if (error != 0 && error != EJUSTRETURN) { goto release; - + } + #if CONTENT_FILTER if (error == 0) { /* * Content filter processing */ - error = cfil_sock_data_out(so, addr, m, - control, 0); - if (error != 0 && error != EJUSTRETURN) + error = cfil_sock_data_out(so, NULL, m, + NULL, 0); + if (error != 0 && error != EJUSTRETURN) { goto release; + } } #endif /* CONTENT_FILTER */ /* @@ -2410,70 +2891,372 @@ sosend_list(struct socket *so, struct sockaddr *addr, struct uio **uioarray, */ if (error == EJUSTRETURN) { error = 0; - if (prevnextp != NULL) + if (prevnextp != NULL) { *prevnextp = nextpkt; - else + } else { top = nextpkt; - } - + } + } + m = nextpkt; - if (m != NULL) + if (m != NULL) { prevnextp = &m->m_nextpkt; + } } } - if (top != NULL) + if (top != NULL) { error = (*so->so_proto->pr_usrreqs->pru_send_list) - (so, 0, top, addr, control, p); + (so, 0, top, NULL, NULL, p); + } - if (dontroute) + if (dontroute) { so->so_options &= ~SO_DONTROUTE; + } - clen = 0; top = NULL; uiofirst = uiolast; } while (resid > 0 && error == 0); release: - if (sblocked) - sbunlock(&so->so_snd, FALSE); /* will unlock socket */ - else + if (sblocked) { + sbunlock(&so->so_snd, FALSE); /* will unlock socket */ + } else { socket_unlock(so, 1); + } out: - if (top != NULL) + if (top != NULL) { m_freem(top); - if (control != NULL) - m_freem(control); - if (freelist != NULL) + } + if (freelist != NULL) { m_freem_list(freelist); + } KERNEL_DEBUG(DBG_FNC_SOSEND_LIST | DBG_FUNC_END, so, resid, so->so_snd.sb_cc, 0, error); - return (error); + return error; } /* - * Implement receive operations on a socket. - * We depend on the way that records are added to the sockbuf - * by sbappend*. In particular, each record (mbufs linked through m_next) - * must begin with an address if the protocol so specifies, - * followed by an optional mbuf or mbufs containing ancillary data, - * and then zero or more mbufs of data. - * In order to avoid blocking network interrupts for the entire time here, - * we splx() while doing the actual copy to user space. - * Although the sockbuf is locked, new data may still be appended, - * and thus we must maintain consistency of the sockbuf during that time. - * - * The caller may receive the data as a single mbuf chain by supplying - * an mbuf **mp0 for use in returning the chain. The uio is then used - * only for the count in uio_resid. - * - * Returns: 0 Success - * ENOBUFS - * ENOTCONN - * EWOULDBLOCK - * uiomove:EFAULT - * sblock:EWOULDBLOCK - * sblock:EINTR + * May return ERESTART when packet is dropped by MAC policy check + */ +static int +soreceive_addr(struct proc *p, struct socket *so, struct sockaddr **psa, + int flags, struct mbuf **mp, struct mbuf **nextrecordp, int canwait) +{ + int error = 0; + struct mbuf *m = *mp; + struct mbuf *nextrecord = *nextrecordp; + + KASSERT(m->m_type == MT_SONAME, ("receive 1a")); +#if CONFIG_MACF_SOCKET_SUBSET + /* + * Call the MAC framework for policy checking if we're in + * the user process context and the socket isn't connected. + */ + if (p != kernproc && !(so->so_state & SS_ISCONNECTED)) { + struct mbuf *m0 = m; + /* + * Dequeue this record (temporarily) from the receive + * list since we're about to drop the socket's lock + * where a new record may arrive and be appended to + * the list. Upon MAC policy failure, the record + * will be freed. Otherwise, we'll add it back to + * the head of the list. We cannot rely on SB_LOCK + * because append operation uses the socket's lock. + */ + do { + m->m_nextpkt = NULL; + sbfree(&so->so_rcv, m); + m = m->m_next; + } while (m != NULL); + m = m0; + so->so_rcv.sb_mb = nextrecord; + SB_EMPTY_FIXUP(&so->so_rcv); + SBLASTRECORDCHK(&so->so_rcv, "soreceive 1a"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive 1a"); + socket_unlock(so, 0); + + if (mac_socket_check_received(proc_ucred(p), so, + mtod(m, struct sockaddr *)) != 0) { + /* + * MAC policy failure; free this record and + * process the next record (or block until + * one is available). We have adjusted sb_cc + * and sb_mbcnt above so there is no need to + * call sbfree() again. + */ + m_freem(m); + /* + * Clear SB_LOCK but don't unlock the socket. + * Process the next record or wait for one. + */ + socket_lock(so, 0); + sbunlock(&so->so_rcv, TRUE); /* stay locked */ + error = ERESTART; + goto done; + } + socket_lock(so, 0); + /* + * If the socket has been defunct'd, drop it. + */ + if (so->so_flags & SOF_DEFUNCT) { + m_freem(m); + error = ENOTCONN; + goto done; + } + /* + * Re-adjust the socket receive list and re-enqueue + * the record in front of any packets which may have + * been appended while we dropped the lock. + */ + for (m = m0; m->m_next != NULL; m = m->m_next) { + sballoc(&so->so_rcv, m); + } + sballoc(&so->so_rcv, m); + if (so->so_rcv.sb_mb == NULL) { + so->so_rcv.sb_lastrecord = m0; + so->so_rcv.sb_mbtail = m; + } + m = m0; + nextrecord = m->m_nextpkt = so->so_rcv.sb_mb; + so->so_rcv.sb_mb = m; + SBLASTRECORDCHK(&so->so_rcv, "soreceive 1b"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive 1b"); + } +#endif /* CONFIG_MACF_SOCKET_SUBSET */ + if (psa != NULL) { + *psa = dup_sockaddr(mtod(m, struct sockaddr *), canwait); + if ((*psa == NULL) && (flags & MSG_NEEDSA)) { + error = EWOULDBLOCK; + goto done; + } + } + if (flags & MSG_PEEK) { + m = m->m_next; + } else { + sbfree(&so->so_rcv, m); + if (m->m_next == NULL && so->so_rcv.sb_cc != 0) { + panic("%s: about to create invalid socketbuf", + __func__); + /* NOTREACHED */ + } + MFREE(m, so->so_rcv.sb_mb); + m = so->so_rcv.sb_mb; + if (m != NULL) { + m->m_nextpkt = nextrecord; + } else { + so->so_rcv.sb_mb = nextrecord; + SB_EMPTY_FIXUP(&so->so_rcv); + } + } +done: + *mp = m; + *nextrecordp = nextrecord; + + return error; +} + +/* + * Process one or more MT_CONTROL mbufs present before any data mbufs + * in the first mbuf chain on the socket buffer. If MSG_PEEK, we + * just copy the data; if !MSG_PEEK, we call into the protocol to + * perform externalization. + */ +static int +soreceive_ctl(struct socket *so, struct mbuf **controlp, int flags, + struct mbuf **mp, struct mbuf **nextrecordp) +{ + int error = 0; + struct mbuf *cm = NULL, *cmn; + struct mbuf **cme = &cm; + struct sockbuf *sb_rcv = &so->so_rcv; + struct mbuf **msgpcm = NULL; + struct mbuf *m = *mp; + struct mbuf *nextrecord = *nextrecordp; + struct protosw *pr = so->so_proto; + + /* + * Externalizing the control messages would require us to + * drop the socket's lock below. Once we re-acquire the + * lock, the mbuf chain might change. In order to preserve + * consistency, we unlink all control messages from the + * first mbuf chain in one shot and link them separately + * onto a different chain. + */ + do { + if (flags & MSG_PEEK) { + if (controlp != NULL) { + if (*controlp == NULL) { + msgpcm = controlp; + } + *controlp = m_copy(m, 0, m->m_len); + + /* + * If we failed to allocate an mbuf, + * release any previously allocated + * mbufs for control data. Return + * an error. Keep the mbufs in the + * socket as this is using + * MSG_PEEK flag. + */ + if (*controlp == NULL) { + m_freem(*msgpcm); + error = ENOBUFS; + goto done; + } + controlp = &(*controlp)->m_next; + } + m = m->m_next; + } else { + m->m_nextpkt = NULL; + sbfree(sb_rcv, m); + sb_rcv->sb_mb = m->m_next; + m->m_next = NULL; + *cme = m; + cme = &(*cme)->m_next; + m = sb_rcv->sb_mb; + } + } while (m != NULL && m->m_type == MT_CONTROL); + + if (!(flags & MSG_PEEK)) { + if (sb_rcv->sb_mb != NULL) { + sb_rcv->sb_mb->m_nextpkt = nextrecord; + } else { + sb_rcv->sb_mb = nextrecord; + SB_EMPTY_FIXUP(sb_rcv); + } + if (nextrecord == NULL) { + sb_rcv->sb_lastrecord = m; + } + } + + SBLASTRECORDCHK(&so->so_rcv, "soreceive ctl"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive ctl"); + + while (cm != NULL) { + int cmsg_type; + + cmn = cm->m_next; + cm->m_next = NULL; + cmsg_type = mtod(cm, struct cmsghdr *)->cmsg_type; + + /* + * Call the protocol to externalize SCM_RIGHTS message + * and return the modified message to the caller upon + * success. Otherwise, all other control messages are + * returned unmodified to the caller. Note that we + * only get into this loop if MSG_PEEK is not set. + */ + if (pr->pr_domain->dom_externalize != NULL && + cmsg_type == SCM_RIGHTS) { + /* + * Release socket lock: see 3903171. This + * would also allow more records to be appended + * to the socket buffer. We still have SB_LOCK + * set on it, so we can be sure that the head + * of the mbuf chain won't change. + */ + socket_unlock(so, 0); + error = (*pr->pr_domain->dom_externalize)(cm); + socket_lock(so, 0); + } else { + error = 0; + } + + if (controlp != NULL && error == 0) { + *controlp = cm; + controlp = &(*controlp)->m_next; + } else { + (void) m_free(cm); + } + cm = cmn; + } + /* + * Update the value of nextrecord in case we received new + * records when the socket was unlocked above for + * externalizing SCM_RIGHTS. + */ + if (m != NULL) { + nextrecord = sb_rcv->sb_mb->m_nextpkt; + } else { + nextrecord = sb_rcv->sb_mb; + } + +done: + *mp = m; + *nextrecordp = nextrecord; + + return error; +} + +/* + * If we have less data than requested, block awaiting more + * (subject to any timeout) if: + * 1. the current count is less than the low water mark, or + * 2. MSG_WAITALL is set, and it is possible to do the entire + * receive operation at once if we block (resid <= hiwat). + * 3. MSG_DONTWAIT is not set + * If MSG_WAITALL is set but resid is larger than the receive buffer, + * we have to do the receive in sections, and thus risk returning + * a short count if a timeout or signal occurs after we start. + */ +static boolean_t +so_should_wait(struct socket *so, struct uio *uio, struct mbuf *m, int flags) +{ + struct protosw *pr = so->so_proto; + + /* No mbufs in the receive-queue? Wait! */ + if (m == NULL) { + return true; + } + + /* Not enough data in the receive socket-buffer - we may have to wait */ + if ((flags & MSG_DONTWAIT) == 0 && so->so_rcv.sb_cc < uio_resid(uio) && + m->m_nextpkt == NULL && (pr->pr_flags & PR_ATOMIC) == 0) { + /* + * Application did set the lowater-mark, so we should wait for + * this data to be present. + */ + if (so->so_rcv.sb_cc < so->so_rcv.sb_lowat) { + return true; + } + + /* + * Application wants all the data - so let's try to do the + * receive-operation at once by waiting for everything to + * be there. + */ + if ((flags & MSG_WAITALL) && uio_resid(uio) <= so->so_rcv.sb_hiwat) { + return true; + } + } + + return false; +} + +/* + * Implement receive operations on a socket. + * We depend on the way that records are added to the sockbuf + * by sbappend*. In particular, each record (mbufs linked through m_next) + * must begin with an address if the protocol so specifies, + * followed by an optional mbuf or mbufs containing ancillary data, + * and then zero or more mbufs of data. + * In order to avoid blocking network interrupts for the entire time here, + * we splx() while doing the actual copy to user space. + * Although the sockbuf is locked, new data may still be appended, + * and thus we must maintain consistency of the sockbuf during that time. + * + * The caller may receive the data as a single mbuf chain by supplying + * an mbuf **mp0 for use in returning the chain. The uio is then used + * only for the count in uio_resid. + * + * Returns: 0 Success + * ENOBUFS + * ENOTCONN + * EWOULDBLOCK + * uiomove:EFAULT + * sblock:EWOULDBLOCK + * sblock:EINTR * sbwait:EBADF * sbwait:EINTR * sodelayed_copy:EFAULT @@ -2497,22 +3280,24 @@ soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio, int flags, error, offset; user_ssize_t len; struct protosw *pr = so->so_proto; - int moff, type =0; + int moff, type = 0; user_ssize_t orig_resid = uio_resid(uio); user_ssize_t delayed_copy_len; int can_delay; - int need_event; struct proc *p = current_proc(); - - KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_START, so, uio_resid(uio), - so->so_rcv.sb_cc, so->so_rcv.sb_lowat, so->so_rcv.sb_hiwat); + boolean_t en_tracing = FALSE; /* * Sanity check on the length passed by caller as we are making 'int' * comparisons */ - if (orig_resid < 0 || orig_resid > INT_MAX) - return (EINVAL); + if (orig_resid < 0 || orig_resid > INT_MAX) { + return EINVAL; + } + + KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_START, so, + uio_resid(uio), so->so_rcv.sb_cc, so->so_rcv.sb_lowat, + so->so_rcv.sb_hiwat); socket_lock(so, 1); so_update_last_owner_locked(so, p); @@ -2525,14 +3310,17 @@ soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio, } #endif mp = mp0; - if (psa != NULL) + if (psa != NULL) { *psa = NULL; - if (controlp != NULL) + } + if (controlp != NULL) { *controlp = NULL; - if (flagsp != NULL) - flags = *flagsp &~ MSG_EOR; - else + } + if (flagsp != NULL) { + flags = *flagsp & ~MSG_EOR; + } else { flags = 0; + } /* * If a recv attempt is made on a previously-accepted socket @@ -2543,18 +3331,54 @@ soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio, struct sockbuf *sb = &so->so_rcv; error = ENOTCONN; - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] (%d)\n", - __func__, proc_pid(p), (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] (%d)\n", + __func__, proc_pid(p), proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); /* * This socket should have been disconnected and flushed * prior to being returned from sodefunct(); there should * be no data on its receive list, so panic otherwise. */ - if (so->so_state & SS_DEFUNCT) + if (so->so_state & SS_DEFUNCT) { sb_empty_assert(sb, __func__); + } socket_unlock(so, 1); - return (error); + return error; + } + + if ((so->so_flags1 & SOF1_PRECONNECT_DATA) && + pr->pr_usrreqs->pru_preconnect) { + /* + * A user may set the CONNECT_RESUME_ON_READ_WRITE-flag but not + * calling write() right after this. *If* the app calls a read + * we do not want to block this read indefinetely. Thus, + * we trigger a connect so that the session gets initiated. + */ + error = (*pr->pr_usrreqs->pru_preconnect)(so); + + if (error) { + socket_unlock(so, 1); + return error; + } + } + + if (ENTR_SHOULDTRACE && + (SOCK_CHECK_DOM(so, AF_INET) || SOCK_CHECK_DOM(so, AF_INET6))) { + /* + * enable energy tracing for inet sockets that go over + * non-loopback interfaces only. + */ + struct inpcb *inp = sotoinpcb(so); + if (inp->inp_last_outifp != NULL && + !(inp->inp_last_outifp->if_flags & IFF_LOOPBACK)) { + en_tracing = TRUE; + KERNEL_ENERGYTRACE(kEnTrActKernSockRead, DBG_FUNC_START, + VM_KERNEL_ADDRPERM(so), + ((so->so_state & SS_NBIO) ? + kEnTrFlagNonBlocking : 0), + (int64_t)orig_resid); + } } /* @@ -2571,11 +3395,12 @@ soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio, socket_unlock(so, 1); KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, ENOBUFS, 0, 0, 0, 0); - return (ENOBUFS); + return ENOBUFS; } error = (*pr->pr_usrreqs->pru_rcvoob)(so, m, flags & MSG_PEEK); - if (error) + if (error) { goto bad; + } socket_unlock(so, 0); do { error = uiomove(mtod(m, caddr_t), @@ -2584,8 +3409,9 @@ soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio, } while (uio_resid(uio) && error == 0 && m != NULL); socket_lock(so, 0); bad: - if (m != NULL) + if (m != NULL) { m_freem(m); + } if ((so->so_options & SO_WANTOOBFLAG) != 0) { if (error == EWOULDBLOCK || error == EINVAL) { @@ -2602,14 +3428,20 @@ bad: } } socket_unlock(so, 1); + if (en_tracing) { + KERNEL_ENERGYTRACE(kEnTrActKernSockRead, DBG_FUNC_END, + VM_KERNEL_ADDRPERM(so), 0, + (int64_t)(orig_resid - uio_resid(uio))); + } KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error, 0, 0, 0, 0); - return (error); + return error; } nooob: - if (mp != NULL) + if (mp != NULL) { *mp = NULL; + } if (so->so_state & SS_ISCONFIRMING && uio_resid(uio)) { (*pr->pr_usrreqs->pru_rcvd)(so, 0); @@ -2619,9 +3451,10 @@ nooob: delayed_copy_len = 0; restart: #ifdef MORE_LOCKING_DEBUG - if (so->so_usecount <= 1) + if (so->so_usecount <= 1) { printf("soreceive: sblock so=0x%llx ref=%d on socket\n", - (uint64_t)VM_KERNEL_ADDRPERM(so), so->so_usecount); + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), so->so_usecount); + } #endif /* * See if the socket has been closed (SS_NOFDREF|SS_CANTRCVMORE) @@ -2642,7 +3475,7 @@ restart: if ((so->so_state & (SS_NOFDREF | SS_CANTRCVMORE)) == (SS_NOFDREF | SS_CANTRCVMORE) && !(so->so_flags & SOF_MP_SUBFLOW)) { socket_unlock(so, 1); - return (0); + return 0; } error = sblock(&so->so_rcv, SBLOCKWAIT(flags)); @@ -2650,26 +3483,16 @@ restart: socket_unlock(so, 1); KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error, 0, 0, 0, 0); - return (error); + if (en_tracing) { + KERNEL_ENERGYTRACE(kEnTrActKernSockRead, DBG_FUNC_END, + VM_KERNEL_ADDRPERM(so), 0, + (int64_t)(orig_resid - uio_resid(uio))); + } + return error; } m = so->so_rcv.sb_mb; - /* - * If we have less data than requested, block awaiting more - * (subject to any timeout) if: - * 1. the current count is less than the low water mark, or - * 2. MSG_WAITALL is set, and it is possible to do the entire - * receive operation at once if we block (resid <= hiwat). - * 3. MSG_DONTWAIT is not set - * If MSG_WAITALL is set but resid is larger than the receive buffer, - * we have to do the receive in sections, and thus risk returning - * a short count if a timeout or signal occurs after we start. - */ - if (m == NULL || (((flags & MSG_DONTWAIT) == 0 && - so->so_rcv.sb_cc < uio_resid(uio)) && - (so->so_rcv.sb_cc < so->so_rcv.sb_lowat || - ((flags & MSG_WAITALL) && uio_resid(uio) <= so->so_rcv.sb_hiwat)) && - m->m_nextpkt == NULL && (pr->pr_flags & PR_ATOMIC) == 0)) { + if (so_should_wait(so, uio, m, flags)) { /* * Panic if we notice inconsistencies in the socket's * receive list; both sb_mb and sb_cc should correctly @@ -2680,11 +3503,13 @@ restart: SB_MB_CHECK(&so->so_rcv); if (so->so_error) { - if (m != NULL) + if (m != NULL) { goto dontblock; + } error = so->so_error; - if ((flags & MSG_PEEK) == 0) + if ((flags & MSG_PEEK) == 0) { so->so_error = 0; + } goto release; } if (so->so_state & SS_CANTRCVMORE) { @@ -2693,46 +3518,69 @@ restart: * Deal with half closed connections */ if ((so->so_state & SS_ISDISCONNECTED) == 0 && - cfil_sock_data_pending(&so->so_rcv) != 0) + cfil_sock_data_pending(&so->so_rcv) != 0) { CFIL_LOG(LOG_INFO, - "so %llx ignore SS_CANTRCVMORE", - (uint64_t)VM_KERNEL_ADDRPERM(so)); - else + "so %llx ignore SS_CANTRCVMORE", + (uint64_t)DEBUG_KERNEL_ADDRPERM(so)); + } else #endif /* CONTENT_FILTER */ - if (m != NULL) + if (m != NULL) { goto dontblock; - else + } else { goto release; + } } - for (; m != NULL; m = m->m_next) + for (; m != NULL; m = m->m_next) { if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) { m = so->so_rcv.sb_mb; goto dontblock; } - if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 && + } + if ((so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) == 0 && (so->so_proto->pr_flags & PR_CONNREQUIRED)) { error = ENOTCONN; goto release; } - if (uio_resid(uio) == 0) + if (uio_resid(uio) == 0) { goto release; + } + if ((so->so_state & SS_NBIO) || - (flags & (MSG_DONTWAIT|MSG_NBIO))) { + (flags & (MSG_DONTWAIT | MSG_NBIO))) { error = EWOULDBLOCK; goto release; } SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1"); SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1"); - sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ + sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ #if EVEN_MORE_LOCKING_DEBUG - if (socket_debug) + if (socket_debug) { printf("Waiting for socket data\n"); + } #endif - error = sbwait(&so->so_rcv); + /* + * Depending on the protocol (e.g. TCP), the following + * might cause the socket lock to be dropped and later + * be reacquired, and more data could have arrived and + * have been appended to the receive socket buffer by + * the time it returns. Therefore, we only sleep in + * sbwait() below if and only if the wait-condition is still + * true. + */ + if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb != NULL) { + (*pr->pr_usrreqs->pru_rcvd)(so, flags); + } + + error = 0; + if (so_should_wait(so, uio, so->so_rcv.sb_mb, flags)) { + error = sbwait(&so->so_rcv); + } + #if EVEN_MORE_LOCKING_DEBUG - if (socket_debug) + if (socket_debug) { printf("SORECEIVE - sbwait returned %d\n", error); + } #endif if (so->so_usecount < 1) { panic("%s: after 2nd sblock so=%p ref=%d on socket\n", @@ -2743,7 +3591,12 @@ restart: socket_unlock(so, 1); KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error, 0, 0, 0, 0); - return (error); + if (en_tracing) { + KERNEL_ENERGYTRACE(kEnTrActKernSockRead, DBG_FUNC_END, + VM_KERNEL_ADDRPERM(so), 0, + (int64_t)(orig_resid - uio_resid(uio))); + } + return error; } goto restart; } @@ -2752,111 +3605,16 @@ dontblock: SBLASTRECORDCHK(&so->so_rcv, "soreceive 1"); SBLASTMBUFCHK(&so->so_rcv, "soreceive 1"); nextrecord = m->m_nextpkt; - if ((pr->pr_flags & PR_ADDR) && m->m_type == MT_SONAME) { - KASSERT(m->m_type == MT_SONAME, ("receive 1a")); -#if CONFIG_MACF_SOCKET_SUBSET - /* - * Call the MAC framework for policy checking if we're in - * the user process context and the socket isn't connected. - */ - if (p != kernproc && !(so->so_state & SS_ISCONNECTED)) { - struct mbuf *m0 = m; - /* - * Dequeue this record (temporarily) from the receive - * list since we're about to drop the socket's lock - * where a new record may arrive and be appended to - * the list. Upon MAC policy failure, the record - * will be freed. Otherwise, we'll add it back to - * the head of the list. We cannot rely on SB_LOCK - * because append operation uses the socket's lock. - */ - do { - m->m_nextpkt = NULL; - sbfree(&so->so_rcv, m); - m = m->m_next; - } while (m != NULL); - m = m0; - so->so_rcv.sb_mb = nextrecord; - SB_EMPTY_FIXUP(&so->so_rcv); - SBLASTRECORDCHK(&so->so_rcv, "soreceive 1a"); - SBLASTMBUFCHK(&so->so_rcv, "soreceive 1a"); - socket_unlock(so, 0); - if (mac_socket_check_received(proc_ucred(p), so, - mtod(m, struct sockaddr *)) != 0) { - /* - * MAC policy failure; free this record and - * process the next record (or block until - * one is available). We have adjusted sb_cc - * and sb_mbcnt above so there is no need to - * call sbfree() again. - */ - do { - m = m_free(m); - } while (m != NULL); - /* - * Clear SB_LOCK but don't unlock the socket. - * Process the next record or wait for one. - */ - socket_lock(so, 0); - sbunlock(&so->so_rcv, TRUE); /* stay locked */ - goto restart; - } - socket_lock(so, 0); - /* - * If the socket has been defunct'd, drop it. - */ - if (so->so_flags & SOF_DEFUNCT) { - m_freem(m); - error = ENOTCONN; - goto release; - } - /* - * Re-adjust the socket receive list and re-enqueue - * the record in front of any packets which may have - * been appended while we dropped the lock. - */ - for (m = m0; m->m_next != NULL; m = m->m_next) - sballoc(&so->so_rcv, m); - sballoc(&so->so_rcv, m); - if (so->so_rcv.sb_mb == NULL) { - so->so_rcv.sb_lastrecord = m0; - so->so_rcv.sb_mbtail = m; - } - m = m0; - nextrecord = m->m_nextpkt = so->so_rcv.sb_mb; - so->so_rcv.sb_mb = m; - SBLASTRECORDCHK(&so->so_rcv, "soreceive 1b"); - SBLASTMBUFCHK(&so->so_rcv, "soreceive 1b"); + if ((pr->pr_flags & PR_ADDR) && m->m_type == MT_SONAME) { + error = soreceive_addr(p, so, psa, flags, &m, &nextrecord, + mp0 == NULL); + if (error == ERESTART) { + goto restart; + } else if (error != 0) { + goto release; } -#endif /* CONFIG_MACF_SOCKET_SUBSET */ orig_resid = 0; - if (psa != NULL) { - *psa = dup_sockaddr(mtod(m, struct sockaddr *), - mp0 == NULL); - if ((*psa == NULL) && (flags & MSG_NEEDSA)) { - error = EWOULDBLOCK; - goto release; - } - } - if (flags & MSG_PEEK) { - m = m->m_next; - } else { - sbfree(&so->so_rcv, m); - if (m->m_next == NULL && so->so_rcv.sb_cc != 0) { - panic("%s: about to create invalid socketbuf", - __func__); - /* NOTREACHED */ - } - MFREE(m, so->so_rcv.sb_mb); - m = so->so_rcv.sb_mb; - if (m != NULL) { - m->m_nextpkt = nextrecord; - } else { - so->so_rcv.sb_mb = nextrecord; - SB_EMPTY_FIXUP(&so->so_rcv); - } - } } /* @@ -2866,139 +3624,11 @@ dontblock: * perform externalization. */ if (m != NULL && m->m_type == MT_CONTROL) { - struct mbuf *cm = NULL, *cmn; - struct mbuf **cme = &cm; - struct sockbuf *sb_rcv = &so->so_rcv; - struct mbuf **msgpcm = NULL; - - /* - * Externalizing the control messages would require us to - * drop the socket's lock below. Once we re-acquire the - * lock, the mbuf chain might change. In order to preserve - * consistency, we unlink all control messages from the - * first mbuf chain in one shot and link them separately - * onto a different chain. - */ - do { - if (flags & MSG_PEEK) { - if (controlp != NULL) { - if (*controlp == NULL) { - msgpcm = controlp; - } - *controlp = m_copy(m, 0, m->m_len); - - /* - * If we failed to allocate an mbuf, - * release any previously allocated - * mbufs for control data. Return - * an error. Keep the mbufs in the - * socket as this is using - * MSG_PEEK flag. - */ - if (*controlp == NULL) { - m_freem(*msgpcm); - error = ENOBUFS; - goto release; - } - controlp = &(*controlp)->m_next; - } - m = m->m_next; - } else { - m->m_nextpkt = NULL; - sbfree(sb_rcv, m); - sb_rcv->sb_mb = m->m_next; - m->m_next = NULL; - *cme = m; - cme = &(*cme)->m_next; - m = sb_rcv->sb_mb; - } - } while (m != NULL && m->m_type == MT_CONTROL); - - if (!(flags & MSG_PEEK)) { - if (sb_rcv->sb_mb != NULL) { - sb_rcv->sb_mb->m_nextpkt = nextrecord; - } else { - sb_rcv->sb_mb = nextrecord; - SB_EMPTY_FIXUP(sb_rcv); - } - if (nextrecord == NULL) - sb_rcv->sb_lastrecord = m; - } - - SBLASTRECORDCHK(&so->so_rcv, "soreceive ctl"); - SBLASTMBUFCHK(&so->so_rcv, "soreceive ctl"); - - while (cm != NULL) { - int cmsg_type; - - cmn = cm->m_next; - cm->m_next = NULL; - cmsg_type = mtod(cm, struct cmsghdr *)->cmsg_type; - - /* - * Call the protocol to externalize SCM_RIGHTS message - * and return the modified message to the caller upon - * success. Otherwise, all other control messages are - * returned unmodified to the caller. Note that we - * only get into this loop if MSG_PEEK is not set. - */ - if (pr->pr_domain->dom_externalize != NULL && - cmsg_type == SCM_RIGHTS) { - /* - * Release socket lock: see 3903171. This - * would also allow more records to be appended - * to the socket buffer. We still have SB_LOCK - * set on it, so we can be sure that the head - * of the mbuf chain won't change. - */ - socket_unlock(so, 0); - error = (*pr->pr_domain->dom_externalize)(cm); - socket_lock(so, 0); - } else { - error = 0; - } - - if (controlp != NULL && error == 0) { - *controlp = cm; - controlp = &(*controlp)->m_next; - orig_resid = 0; - } else { - (void) m_free(cm); - } - cm = cmn; - } - /* - * Update the value of nextrecord in case we received new - * records when the socket was unlocked above for - * externalizing SCM_RIGHTS. - */ - if (m != NULL) - nextrecord = sb_rcv->sb_mb->m_nextpkt; - else - nextrecord = sb_rcv->sb_mb; - orig_resid = 0; - } - - /* - * If the socket is a TCP socket with message delivery - * enabled, then create a control msg to deliver the - * relative TCP sequence number for this data. Waiting - * until this point will protect against failures to - * allocate an mbuf for control msgs. - */ - if (so->so_type == SOCK_STREAM && SOCK_PROTO(so) == IPPROTO_TCP && - (so->so_flags & SOF_ENABLE_MSGS) && controlp != NULL) { - struct mbuf *seq_cm; - - seq_cm = sbcreatecontrol((caddr_t)&m->m_pkthdr.msg_seq, - sizeof (uint32_t), SCM_SEQNUM, SOL_SOCKET); - if (seq_cm == NULL) { - /* unable to allocate a control mbuf */ - error = ENOBUFS; + error = soreceive_ctl(so, controlp, flags, &m, &nextrecord); + if (error != 0) { goto release; } - *controlp = seq_cm; - controlp = &seq_cm->m_next; + orig_resid = 0; } if (m != NULL) { @@ -3018,12 +3648,14 @@ dontblock: nextrecord); /* NOTREACHED */ } - if (nextrecord == NULL) + if (nextrecord == NULL) { so->so_rcv.sb_lastrecord = m; + } } type = m->m_type; - if (type == MT_OOBDATA) + if (type == MT_OOBDATA) { flags |= MSG_OOB; + } } else { if (!(flags & MSG_PEEK)) { SB_EMPTY_FIXUP(&so->so_rcv); @@ -3035,18 +3667,18 @@ dontblock: moff = 0; offset = 0; - if (!(flags & MSG_PEEK) && uio_resid(uio) > sorecvmincopy) + if (!(flags & MSG_PEEK) && uio_resid(uio) > sorecvmincopy) { can_delay = 1; - else + } else { can_delay = 0; - - need_event = 0; + } while (m != NULL && (uio_resid(uio) - delayed_copy_len) > 0 && error == 0) { if (m->m_type == MT_OOBDATA) { - if (type != MT_OOBDATA) + if (type != MT_OOBDATA) { break; + } } else if (type == MT_OOBDATA) { break; } @@ -3061,10 +3693,12 @@ dontblock: } so->so_state &= ~SS_RCVATMARK; len = uio_resid(uio) - delayed_copy_len; - if (so->so_oobmark && len > so->so_oobmark - offset) + if (so->so_oobmark && len > so->so_oobmark - offset) { len = so->so_oobmark - offset; - if (len > m->m_len - moff) + } + if (len > m->m_len - moff) { len = m->m_len - moff; + } /* * If mp is set, just pass back the mbufs. * Otherwise copy them out via the uio, then free. @@ -3117,15 +3751,17 @@ dontblock: (int)len, uio); socket_lock(so, 0); - if (error) + if (error) { goto release; + } } } else { uio_setresid(uio, (uio_resid(uio) - len)); } if (len == m->m_len - moff) { - if (m->m_flags & M_EOR) + if (m->m_flags & M_EOR) { flags |= MSG_EOR; + } if (flags & MSG_PEEK) { m = m->m_next; moff = 0; @@ -3134,46 +3770,26 @@ dontblock: sbfree(&so->so_rcv, m); m->m_nextpkt = NULL; - /* - * If this packet is an unordered packet - * (indicated by M_UNORDERED_DATA flag), remove - * the additional bytes added to the - * receive socket buffer size. - */ - if ((so->so_flags & SOF_ENABLE_MSGS) && - m->m_len && - (m->m_flags & M_UNORDERED_DATA) && - sbreserve(&so->so_rcv, - so->so_rcv.sb_hiwat - m->m_len)) { - if (so->so_msg_state->msg_uno_bytes > - m->m_len) { - so->so_msg_state-> - msg_uno_bytes -= m->m_len; - } else { - so->so_msg_state-> - msg_uno_bytes = 0; - } - m->m_flags &= ~M_UNORDERED_DATA; - } - if (mp != NULL) { *mp = m; mp = &m->m_next; so->so_rcv.sb_mb = m = m->m_next; *mp = NULL; } else { - if (free_list == NULL) + if (free_list == NULL) { free_list = m; - else + } else { ml->m_next = m; + } ml = m; so->so_rcv.sb_mb = m = m->m_next; ml->m_next = NULL; } if (m != NULL) { m->m_nextpkt = nextrecord; - if (nextrecord == NULL) + if (nextrecord == NULL) { so->so_rcv.sb_lastrecord = m; + } } else { so->so_rcv.sb_mb = nextrecord; SB_EMPTY_FIXUP(&so->so_rcv); @@ -3188,10 +3804,11 @@ dontblock: if (mp != NULL) { int copy_flag; - if (flags & MSG_DONTWAIT) + if (flags & MSG_DONTWAIT) { copy_flag = M_DONTWAIT; - else + } else { copy_flag = M_WAIT; + } *mp = m_copym(m, 0, len, copy_flag); /* * Failed to allocate an mbuf? @@ -3215,22 +3832,18 @@ dontblock: so->so_oobmark -= len; if (so->so_oobmark == 0) { so->so_state |= SS_RCVATMARK; - /* - * delay posting the actual event until - * after any delayed copy processing - * has finished - */ - need_event = 1; break; } } else { offset += len; - if (offset == so->so_oobmark) + if (offset == so->so_oobmark) { break; + } } } - if (flags & MSG_EOR) + if (flags & MSG_EOR) { break; + } /* * If the MSG_WAITALL or MSG_WAITSTREAM flag is set * (for non-atomic socket), we must not quit until @@ -3239,15 +3852,16 @@ dontblock: * count but without error. Keep sockbuf locked * against other readers. */ - while (flags & (MSG_WAITALL|MSG_WAITSTREAM) && m == NULL && + while (flags & (MSG_WAITALL | MSG_WAITSTREAM) && m == NULL && (uio_resid(uio) - delayed_copy_len) > 0 && !sosendallatonce(so) && !nextrecord) { if (so->so_error || ((so->so_state & SS_CANTRCVMORE) #if CONTENT_FILTER && cfil_sock_data_pending(&so->so_rcv) == 0 #endif /* CONTENT_FILTER */ - )) + )) { goto release; + } /* * Depending on the protocol (e.g. TCP), the following @@ -3258,10 +3872,9 @@ dontblock: * sbwait() below if and only if the socket buffer is * empty, in order to avoid a false sleep. */ - if (pr->pr_flags & PR_WANTRCVD && so->so_pcb && - (((struct inpcb *)so->so_pcb)->inp_state != - INPCB_STATE_DEAD)) + if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb != NULL) { (*pr->pr_usrreqs->pru_rcvd)(so, flags); + } SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2"); SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2"); @@ -3293,8 +3906,9 @@ dontblock: error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); - if (error) + if (error) { goto release; + } } m = so->so_rcv.sb_mb; if (m != NULL) { @@ -3316,8 +3930,9 @@ dontblock: flags |= MSG_RCVMORE; } else { flags |= MSG_TRUNC; - if ((flags & MSG_PEEK) == 0) + if ((flags & MSG_PEEK) == 0) { (void) sbdroprecord(&so->so_rcv); + } } } @@ -3329,8 +3944,9 @@ dontblock: * is set), and so we set the flag now based on what we know * prior to calling pru_rcvd. */ - if ((so->so_options & SO_WANTMORE) && so->so_rcv.sb_cc > 0) + if ((so->so_options & SO_WANTMORE) && so->so_rcv.sb_cc > 0) { flags |= MSG_HAVEMORE; + } if ((flags & MSG_PEEK) == 0) { if (m == NULL) { @@ -3350,30 +3966,31 @@ dontblock: } SBLASTRECORDCHK(&so->so_rcv, "soreceive 4"); SBLASTMBUFCHK(&so->so_rcv, "soreceive 4"); - if (pr->pr_flags & PR_WANTRCVD && so->so_pcb) + if (pr->pr_flags & PR_WANTRCVD && so->so_pcb) { (*pr->pr_usrreqs->pru_rcvd)(so, flags); + } } if (delayed_copy_len) { error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); - if (error) + if (error) { goto release; + } } if (free_list != NULL) { m_freem_list(free_list); free_list = NULL; } - if (need_event) - postevent(so, 0, EV_OOB); if (orig_resid == uio_resid(uio) && orig_resid && (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) { - sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ + sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ goto restart; } - if (flagsp != NULL) + if (flagsp != NULL) { *flagsp |= flags; + } release: #ifdef MORE_LOCKING_DEBUG if (so->so_usecount <= 1) { @@ -3382,18 +3999,26 @@ release: /* NOTREACHED */ } #endif - if (delayed_copy_len) + if (delayed_copy_len) { error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); + } - if (free_list != NULL) + if (free_list != NULL) { m_freem_list(free_list); + } - sbunlock(&so->so_rcv, FALSE); /* will unlock socket */ + sbunlock(&so->so_rcv, FALSE); /* will unlock socket */ + if (en_tracing) { + KERNEL_ENERGYTRACE(kEnTrActKernSockRead, DBG_FUNC_END, + VM_KERNEL_ADDRPERM(so), + ((error == EWOULDBLOCK) ? kEnTrFlagNoWork : 0), + (int64_t)(orig_resid - uio_resid(uio))); + } KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, so, uio_resid(uio), so->so_rcv.sb_cc, 0, error); - return (error); + return error; } /* @@ -3422,57 +4047,63 @@ sodelayed_copy(struct socket *so, struct uio *uio, struct mbuf **free_list, socket_lock(so, 0); - return (error); + return error; +} + +static int +sodelayed_copy_list(struct socket *so, struct recv_msg_elem *msgarray, + u_int uiocnt, struct mbuf **free_list, user_ssize_t *resid) +{ +#pragma unused(so) + int error = 0; + struct mbuf *ml, *m; + int i = 0; + struct uio *auio; + + for (ml = *free_list, i = 0; ml != NULL && i < uiocnt; + ml = ml->m_nextpkt, i++) { + auio = msgarray[i].uio; + for (m = ml; m != NULL; m = m->m_next) { + error = uiomove(mtod(m, caddr_t), m->m_len, auio); + if (error != 0) { + goto out; + } + } + } +out: + m_freem_list(*free_list); + + *free_list = NULL; + *resid = 0; + + return error; } int -soreceive_list(struct socket *so, struct sockaddr **psa, struct uio **uioarray, - u_int uiocnt, struct mbuf **mp0, struct mbuf **controlp, int *flagsp) +soreceive_list(struct socket *so, struct recv_msg_elem *msgarray, u_int uiocnt, + int *flagsp) { - struct mbuf *m, **mp; + struct mbuf *m; struct mbuf *nextrecord; - struct mbuf *ml = NULL, *free_list = NULL; - int flags, error, offset; - user_ssize_t len; + struct mbuf *ml = NULL, *free_list = NULL, *free_tail = NULL; + int error; + user_ssize_t len, pktlen, delayed_copy_len = 0; struct protosw *pr = so->so_proto; - user_ssize_t orig_resid, resid; + user_ssize_t resid; struct proc *p = current_proc(); struct uio *auio = NULL; - int i = 0; + int npkts = 0; int sblocked = 0; + struct sockaddr **psa = NULL; + struct mbuf **controlp = NULL; + int can_delay; + int flags; + struct mbuf *free_others = NULL; KERNEL_DEBUG(DBG_FNC_SORECEIVE_LIST | DBG_FUNC_START, so, uiocnt, so->so_rcv.sb_cc, so->so_rcv.sb_lowat, so->so_rcv.sb_hiwat); - mp = mp0; - if (psa != NULL) - *psa = NULL; - if (controlp != NULL) - *controlp = NULL; - if (flagsp != NULL) - flags = *flagsp &~ MSG_EOR; - else - flags = 0; - /* - * Disallow functionality not currently supported - */ - if (mp0 != NULL) { - printf("%s mp0 not supported\n", __func__); - error = EOPNOTSUPP; - goto out; - } - if (psa != NULL) { - printf("%s sockaddr not supported\n", __func__); - error = EOPNOTSUPP; - goto out; - } - if (controlp != NULL) { - printf("%s control not supported\n", __func__); - error = EOPNOTSUPP; - goto out; - } - /* * Sanity checks: * - Only supports don't wait flags @@ -3481,9 +4112,15 @@ soreceive_list(struct socket *so, struct sockaddr **psa, struct uio **uioarray, * - Protocol must support packet chains * - The uio array is NULL (should we panic?) */ - if (flags & ~(MSG_DONTWAIT | MSG_NBIO)) { - printf("%s flags not supported\n", __func__); - error = EOPNOTSUPP; + if (flagsp != NULL) { + flags = *flagsp; + } else { + flags = 0; + } + if (flags & ~(MSG_PEEK | MSG_WAITALL | MSG_DONTWAIT | MSG_NEEDSA | + MSG_NBIO)) { + printf("%s invalid flags 0x%x\n", __func__, flags); + error = EINVAL; goto out; } if (so->so_type != SOCK_DGRAM) { @@ -3498,7 +4135,7 @@ soreceive_list(struct socket *so, struct sockaddr **psa, struct uio **uioarray, error = EPROTONOSUPPORT; goto out; } - if (uioarray == NULL) { + if (msgarray == NULL) { printf("%s uioarray is NULL\n", __func__); error = EINVAL; goto out; @@ -3512,12 +4149,18 @@ soreceive_list(struct socket *so, struct sockaddr **psa, struct uio **uioarray, * Sanity check on the length passed by caller as we are making 'int' * comparisons */ - resid = orig_resid = uio_array_resid(uioarray, uiocnt); - if (orig_resid < 0 || orig_resid > INT_MAX) { + resid = recv_msg_array_resid(msgarray, uiocnt); + if (resid < 0 || resid > INT_MAX) { error = EINVAL; goto out; } + if (!(flags & MSG_PEEK) && sorecvmincopy > 0) { + can_delay = 1; + } else { + can_delay = 0; + } + socket_lock(so, 1); so_update_last_owner_locked(so, p); so_update_policy(so); @@ -3525,7 +4168,7 @@ soreceive_list(struct socket *so, struct sockaddr **psa, struct uio **uioarray, #if NECP so_update_necp_policy(so, NULL, NULL); #endif /* NECP */ - + /* * If a recv attempt is made on a previously-accepted socket * that has been marked as inactive (disconnected), reject @@ -3535,20 +4178,29 @@ soreceive_list(struct socket *so, struct sockaddr **psa, struct uio **uioarray, struct sockbuf *sb = &so->so_rcv; error = ENOTCONN; - SODEFUNCTLOG(("%s[%d]: defunct so 0x%llx [%d,%d] (%d)\n", - __func__, proc_pid(p), (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), error)); + SODEFUNCTLOG("%s[%d, %s]: defunct so 0x%llx [%d,%d] (%d)\n", + __func__, proc_pid(p), proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), error); /* * This socket should have been disconnected and flushed * prior to being returned from sodefunct(); there should * be no data on its receive list, so panic otherwise. */ - if (so->so_state & SS_DEFUNCT) + if (so->so_state & SS_DEFUNCT) { sb_empty_assert(sb, __func__); + } + goto release; + } + +next: + /* + * The uio may be empty + */ + if (npkts >= uiocnt) { + error = 0; goto release; } - if (mp != NULL) - *mp = NULL; restart: /* * See if the socket has been closed (SS_NOFDREF|SS_CANTRCVMORE) @@ -3574,23 +4226,13 @@ restart: } sblocked = 1; - /* - * Skip empty uio - */ - auio = uioarray[i]; - while (uio_resid(auio) == 0) { - i++; - if (i >= uiocnt) { - error = 0; - goto release; - } - } - m = so->so_rcv.sb_mb; /* * Block awaiting more datagram if needed */ - if (m == NULL) { + if (m == NULL || (((flags & MSG_DONTWAIT) == 0 && + (so->so_rcv.sb_cc < so->so_rcv.sb_lowat || + ((flags & MSG_WAITALL) && npkts < uiocnt))))) { /* * Panic if we notice inconsistencies in the socket's * receive list; both sb_mb and sb_cc should correctly @@ -3602,35 +4244,36 @@ restart: if (so->so_error) { error = so->so_error; + if ((flags & MSG_PEEK) == 0) { + so->so_error = 0; + } goto release; } if (so->so_state & SS_CANTRCVMORE) { goto release; } - if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 && + if ((so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) == 0 && (so->so_proto->pr_flags & PR_CONNREQUIRED)) { error = ENOTCONN; goto release; } if ((so->so_state & SS_NBIO) || - (flags & (MSG_DONTWAIT|MSG_NBIO))) { + (flags & (MSG_DONTWAIT | MSG_NBIO))) { error = EWOULDBLOCK; goto release; } /* * Do not block if we got some data - * Note: We could use MSG_WAITALL to wait */ - resid = uio_array_resid(uioarray, uiocnt); - if (resid != orig_resid) { + if (free_list != NULL) { error = 0; goto release; } - + SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1"); SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1"); - sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ + sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ sblocked = 0; error = sbwait(&so->so_rcv); @@ -3640,13 +4283,6 @@ restart: goto restart; } - if (m->m_pkthdr.len == 0) { - printf("%s so %llx pkt %llx len is null\n", - __func__, - (uint64_t)VM_KERNEL_ADDRPERM(so), - (uint64_t)VM_KERNEL_ADDRPERM(m)); - goto restart; - } OSIncrementAtomicLong(&p->p_stats->p_ru.ru_msgrcv); SBLASTRECORDCHK(&so->so_rcv, "soreceive 1"); SBLASTMBUFCHK(&so->so_rcv, "soreceive 1"); @@ -3654,101 +4290,120 @@ restart: /* * Consume the current uio index as we have a datagram */ - i += 1; + auio = msgarray[npkts].uio; + resid = uio_resid(auio); + msgarray[npkts].which |= SOCK_MSG_DATA; + psa = (msgarray[npkts].which & SOCK_MSG_SA) ? + &msgarray[npkts].psa : NULL; + controlp = (msgarray[npkts].which & SOCK_MSG_CONTROL) ? + &msgarray[npkts].controlp : NULL; + npkts += 1; nextrecord = m->m_nextpkt; -#if SO_RECEIVE_LIST_SOCKADDR_NOT_YET if ((pr->pr_flags & PR_ADDR) && m->m_type == MT_SONAME) { - /* - * to be adapted from soreceive() - */ + error = soreceive_addr(p, so, psa, flags, &m, &nextrecord, 1); + if (error == ERESTART) { + goto restart; + } else if (error != 0) { + goto release; + } } -#endif /* SO_RECEIVE_LIST_SOCKADDR_NOT_YET */ -#if SO_RECEIVE_LIST_CONTROL_NOT_YET - /* - * Process one or more MT_CONTROL mbufs present before any data mbufs - * in the first mbuf chain on the socket buffer. If MSG_PEEK, we - * just copy the data; if !MSG_PEEK, we call into the protocol to - * perform externalization. - */ if (m != NULL && m->m_type == MT_CONTROL) { - /* - * to be adapted from soreceive() - */ + error = soreceive_ctl(so, controlp, flags, &m, &nextrecord); + if (error != 0) { + goto release; + } } -#endif /* SO_RECEIVE_LIST_CONTROL_NOT_YET */ - offset = 0; + if (m->m_pkthdr.len == 0) { + printf("%s:%d so %llx pkt %llx type %u pktlen null\n", + __func__, __LINE__, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + (uint64_t)DEBUG_KERNEL_ADDRPERM(m), + m->m_type); + } /* - * Loop to copy out the mbufs of the current record + * Loop to copy the mbufs of the current record + * Support zero length packets */ - while (m != NULL && uio_resid(auio) > 0 && error == 0) { - len = uio_resid(auio); - - if (m->m_len == 0) - printf("%s: so %llx m %llx m_len is 0\n", - __func__, - (uint64_t)VM_KERNEL_ADDRPERM(so), - (uint64_t)VM_KERNEL_ADDRPERM(m)); - + ml = NULL; + pktlen = 0; + while (m != NULL && (len = resid - pktlen) >= 0 && error == 0) { + if (m->m_len == 0) { + panic("%p m_len zero", m); + } + if (m->m_type == 0) { + panic("%p m_type zero", m); + } /* * Clip to the residual length */ - if (len > m->m_len) + if (len > m->m_len) { len = m->m_len; + } + pktlen += len; /* - * If mp is set, just pass back the mbufs. - * Otherwise copy them out via the uio, then free. + * Copy the mbufs via the uio or delay the copy * Sockbuf must be consistent here (points to current mbuf, * it points to next record) when we drop priority; * we must note any additions to the sockbuf when we * block interrupts again. */ - if (mp != NULL) { - uio_setresid(auio, (uio_resid(auio) - len)); - } else { - SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove"); - SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove"); - + if (len > 0 && can_delay == 0) { socket_unlock(so, 0); error = uiomove(mtod(m, caddr_t), (int)len, auio); socket_lock(so, 0); - - if (error) + if (error) { goto release; + } + } else { + delayed_copy_len += len; } + if (len == m->m_len) { /* - * m was entirely copied + * m was entirely copied */ - nextrecord = m->m_nextpkt; sbfree(&so->so_rcv, m); + nextrecord = m->m_nextpkt; m->m_nextpkt = NULL; /* - * Move to m_next + * Set the first packet to the head of the free list */ - if (mp != NULL) { - *mp = m; - mp = &m->m_next; - so->so_rcv.sb_mb = m = m->m_next; - *mp = NULL; - } else { - if (free_list == NULL) - free_list = m; - else - ml->m_next = m; - ml = m; - so->so_rcv.sb_mb = m = m->m_next; - ml->m_next = NULL; - ml->m_nextpkt = NULL; + if (free_list == NULL) { + free_list = m; } + /* + * Link current packet to tail of free list + */ + if (ml == NULL) { + if (free_tail != NULL) { + free_tail->m_nextpkt = m; + } + free_tail = m; + } + /* + * Link current mbuf to last mbuf of current packet + */ + if (ml != NULL) { + ml->m_next = m; + } + ml = m; + + /* + * Move next buf to head of socket buffer + */ + so->so_rcv.sb_mb = m = ml->m_next; + ml->m_next = NULL; + if (m != NULL) { m->m_nextpkt = nextrecord; - if (nextrecord == NULL) + if (nextrecord == NULL) { so->so_rcv.sb_lastrecord = m; + } } else { so->so_rcv.sb_mb = nextrecord; SB_EMPTY_FIXUP(&so->so_rcv); @@ -3759,27 +4414,6 @@ restart: /* * Stop the loop on partial copy */ - if (mp != NULL) { - int copy_flag; - - if (flags & MSG_DONTWAIT) - copy_flag = M_DONTWAIT; - else - copy_flag = M_WAIT; - *mp = m_copym(m, 0, len, copy_flag); - /* - * Failed to allocate an mbuf? - * Adjust uio_resid back, it was - * adjusted down by len bytes which - * we didn't copy over. - */ - if (*mp == NULL) { - uio_setresid(auio, - (uio_resid(auio) + len)); - error = ENOMEM; - break; - } - } break; } } @@ -3787,7 +4421,7 @@ restart: if (so->so_usecount <= 1) { panic("%s: after big while so=%llx ref=%d on socket\n", __func__, - (uint64_t)VM_KERNEL_ADDRPERM(so), so->so_usecount); + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), so->so_usecount); /* NOTREACHED */ } #endif @@ -3796,6 +4430,24 @@ restart: */ if (m != NULL) { if (so->so_options & SO_DONTTRUNC) { + /* + * Copyout first the freelist then the partial mbuf + */ + socket_unlock(so, 0); + if (delayed_copy_len) { + error = sodelayed_copy_list(so, msgarray, + uiocnt, &free_list, &delayed_copy_len); + } + + if (error == 0) { + error = uiomove(mtod(m, caddr_t), (int)len, + auio); + } + socket_lock(so, 0); + if (error) { + goto release; + } + m->m_data += len; m->m_len -= len; so->so_rcv.sb_cc -= len; @@ -3832,44 +4484,85 @@ restart: * - There was no error * - A packet was not truncated * - We can still receive more data - */ - if (i < uiocnt && error == 0 && - (flags & (MSG_RCVMORE | MSG_TRUNC)) == 0 - && (so->so_state & SS_CANTRCVMORE) == 0) { - sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ + */ + if (npkts < uiocnt && error == 0 && + (flags & (MSG_RCVMORE | MSG_TRUNC)) == 0 && + (so->so_state & SS_CANTRCVMORE) == 0) { + sbunlock(&so->so_rcv, TRUE); /* keep socket locked */ sblocked = 0; - goto restart; + goto next; + } + if (flagsp != NULL) { + *flagsp |= flags; } release: /* * pru_rcvd may cause more data to be received if the socket lock * is dropped so we set MSG_HAVEMORE now based on what we know. - * That way the caller won't be surprised if it receives less data than requested. + * That way the caller won't be surprised if it receives less data + * than requested. */ - if ((so->so_options & SO_WANTMORE) && so->so_rcv.sb_cc > 0) + if ((so->so_options & SO_WANTMORE) && so->so_rcv.sb_cc > 0) { flags |= MSG_HAVEMORE; + } - if (pr->pr_flags & PR_WANTRCVD && so->so_pcb) + if (pr->pr_flags & PR_WANTRCVD && so->so_pcb) { (*pr->pr_usrreqs->pru_rcvd)(so, flags); + } - if (flagsp != NULL) - *flagsp |= flags; - if (sblocked) - sbunlock(&so->so_rcv, FALSE); /* will unlock socket */ - else + if (sblocked) { + sbunlock(&so->so_rcv, FALSE); /* will unlock socket */ + } else { socket_unlock(so, 1); + } + + if (delayed_copy_len) { + error = sodelayed_copy_list(so, msgarray, uiocnt, + &free_list, &delayed_copy_len); + } out: /* - * Amortize the cost + * Amortize the cost of freeing the mbufs */ - if (free_list != NULL) + if (free_list != NULL) { m_freem_list(free_list); + } + if (free_others != NULL) { + m_freem_list(free_others); + } KERNEL_DEBUG(DBG_FNC_SORECEIVE_LIST | DBG_FUNC_END, error, 0, 0, 0, 0); - return (error); + return error; +} + +static int +so_statistics_event_to_nstat_event(int64_t *input_options, + uint64_t *nstat_event) +{ + int error = 0; + switch (*input_options) { + case SO_STATISTICS_EVENT_ENTER_CELLFALLBACK: + *nstat_event = NSTAT_EVENT_SRC_ENTER_CELLFALLBACK; + break; + case SO_STATISTICS_EVENT_EXIT_CELLFALLBACK: + *nstat_event = NSTAT_EVENT_SRC_EXIT_CELLFALLBACK; + break; +#if (DEBUG || DEVELOPMENT) + case SO_STATISTICS_EVENT_RESERVED_1: + *nstat_event = NSTAT_EVENT_SRC_RESERVED_1; + break; + case SO_STATISTICS_EVENT_RESERVED_2: + *nstat_event = NSTAT_EVENT_SRC_RESERVED_2; + break; +#endif /* (DEBUG || DEVELOPMENT) */ + default: + error = EINVAL; + break; + } + return error; } /* @@ -3903,7 +4596,7 @@ soshutdown(struct socket *so, int how) case SHUT_RDWR: socket_lock(so, 1); if ((so->so_state & - (SS_ISCONNECTED|SS_ISCONNECTING|SS_ISDISCONNECTING)) == 0) { + (SS_ISCONNECTED | SS_ISCONNECTING | SS_ISDISCONNECTING)) == 0) { error = ENOTCONN; } else { error = soshutdownlock(so, how); @@ -3917,7 +4610,7 @@ soshutdown(struct socket *so, int how) KERNEL_DEBUG(DBG_FNC_SOSHUTDOWN | DBG_FUNC_END, how, error, 0, 0, 0); - return (error); + return error; } int @@ -3935,7 +4628,6 @@ soshutdownlock_final(struct socket *so, int how) goto done; } sorflush(so); - postevent(so, 0, EV_RCLOSED); } if (how != SHUT_RD) { if ((so->so_state & SS_CANTSENDMORE) != 0) { @@ -3944,11 +4636,10 @@ soshutdownlock_final(struct socket *so, int how) goto done; } error = (*pr->pr_usrreqs->pru_shutdown)(so); - postevent(so, 0, EV_WCLOSED); } done: KERNEL_DEBUG(DBG_FNC_SOSHUTDOWN, how, 1, 0, 0, 0); - return (error); + return error; } int @@ -3971,31 +4662,17 @@ soshutdownlock(struct socket *so, int how) } } #endif /* CONTENT_FILTER */ - + error = soshutdownlock_final(so, how); done: - return (error); + return error; } void sowflush(struct socket *so) { struct sockbuf *sb = &so->so_snd; -#ifdef notyet - lck_mtx_t *mutex_held; - /* - * XXX: This code is currently commented out, because we may get here - * as part of sofreelastref(), and at that time, pr_getlock() may no - * longer be able to return us the lock; this will be fixed in future. - */ - if (so->so_proto->pr_getlock != NULL) - mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else - mutex_held = so->so_proto->pr_domain->dom_mtx; - - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); -#endif /* notyet */ /* * Obtain lock on the socket buffer (SB_LOCK). This is required @@ -4007,12 +4684,12 @@ sowflush(struct socket *so) (void) sblock(sb, SBL_WAIT | SBL_NOINTR | SBL_IGNDEFUNCT); VERIFY(sb->sb_flags & SB_LOCK); - sb->sb_flags &= ~(SB_SEL|SB_UPCALL); - sb->sb_flags |= SB_DROP; - sb->sb_upcall = NULL; - sb->sb_upcallarg = NULL; + sb->sb_flags &= ~(SB_SEL | SB_UPCALL); + sb->sb_flags |= SB_DROP; + sb->sb_upcall = NULL; + sb->sb_upcallarg = NULL; - sbunlock(sb, TRUE); /* keep socket locked */ + sbunlock(sb, TRUE); /* keep socket locked */ selthreadclear(&sb->sb_sel); sbrelease(sb); @@ -4031,12 +4708,13 @@ sorflush(struct socket *so) * as part of sofreelastref(), and at that time, pr_getlock() may no * longer be able to return us the lock; this will be fixed in future. */ - if (so->so_proto->pr_getlock != NULL) + if (so->so_proto->pr_getlock != NULL) { mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else + } else { mutex_held = so->so_proto->pr_domain->dom_mtx; + } - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); #endif /* notyet */ sflt_notify(so, sock_evt_flush_read, NULL); @@ -4061,20 +4739,20 @@ sorflush(struct socket *so) * Make sure to not carry over SB_LOCK in "asb", as we need * to acquire it later as part of sbrelease(). */ - bzero(&asb, sizeof (asb)); - asb.sb_cc = sb->sb_cc; - asb.sb_hiwat = sb->sb_hiwat; - asb.sb_mbcnt = sb->sb_mbcnt; - asb.sb_mbmax = sb->sb_mbmax; - asb.sb_ctl = sb->sb_ctl; - asb.sb_lowat = sb->sb_lowat; - asb.sb_mb = sb->sb_mb; - asb.sb_mbtail = sb->sb_mbtail; - asb.sb_lastrecord = sb->sb_lastrecord; - asb.sb_so = sb->sb_so; - asb.sb_flags = sb->sb_flags; - asb.sb_flags &= ~(SB_LOCK|SB_SEL|SB_KNOTE|SB_UPCALL); - asb.sb_flags |= SB_DROP; + bzero(&asb, sizeof(asb)); + asb.sb_cc = sb->sb_cc; + asb.sb_hiwat = sb->sb_hiwat; + asb.sb_mbcnt = sb->sb_mbcnt; + asb.sb_mbmax = sb->sb_mbmax; + asb.sb_ctl = sb->sb_ctl; + asb.sb_lowat = sb->sb_lowat; + asb.sb_mb = sb->sb_mb; + asb.sb_mbtail = sb->sb_mbtail; + asb.sb_lastrecord = sb->sb_lastrecord; + asb.sb_so = sb->sb_so; + asb.sb_flags = sb->sb_flags; + asb.sb_flags &= ~(SB_LOCK | SB_SEL | SB_KNOTE | SB_UPCALL); + asb.sb_flags |= SB_DROP; /* * Ideally we'd bzero() these and preserve the ones we need; @@ -4085,23 +4763,23 @@ sorflush(struct socket *so) * Setting SB_DROP acts as a barrier to prevent further appends. * Clearing SB_SEL is done for selthreadclear() below. */ - sb->sb_cc = 0; - sb->sb_hiwat = 0; - sb->sb_mbcnt = 0; - sb->sb_mbmax = 0; - sb->sb_ctl = 0; - sb->sb_lowat = 0; - sb->sb_mb = NULL; - sb->sb_mbtail = NULL; - sb->sb_lastrecord = NULL; - sb->sb_timeo.tv_sec = 0; - sb->sb_timeo.tv_usec = 0; - sb->sb_upcall = NULL; - sb->sb_upcallarg = NULL; - sb->sb_flags &= ~(SB_SEL|SB_UPCALL); - sb->sb_flags |= SB_DROP; - - sbunlock(sb, TRUE); /* keep socket locked */ + sb->sb_cc = 0; + sb->sb_hiwat = 0; + sb->sb_mbcnt = 0; + sb->sb_mbmax = 0; + sb->sb_ctl = 0; + sb->sb_lowat = 0; + sb->sb_mb = NULL; + sb->sb_mbtail = NULL; + sb->sb_lastrecord = NULL; + sb->sb_timeo.tv_sec = 0; + sb->sb_timeo.tv_usec = 0; + sb->sb_upcall = NULL; + sb->sb_upcallarg = NULL; + sb->sb_flags &= ~(SB_SEL | SB_UPCALL); + sb->sb_flags |= SB_DROP; + + sbunlock(sb, TRUE); /* keep socket locked */ /* * Note that selthreadclear() is called on the original "sb" and @@ -4111,8 +4789,9 @@ sorflush(struct socket *so) */ selthreadclear(&sb->sb_sel); - if ((pr->pr_flags & PR_RIGHTS) && pr->pr_domain->dom_dispose) + if ((pr->pr_flags & PR_RIGHTS) && pr->pr_domain->dom_dispose) { (*pr->pr_domain->dom_dispose)(asb.sb_mb); + } sbrelease(&asb); } @@ -4131,7 +4810,7 @@ sorflush(struct socket *so) int sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen) { - size_t valsize; + size_t valsize; /* * If the user gives us more than we wanted, we ignore it, @@ -4139,16 +4818,19 @@ sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen) * wants, we return EINVAL. On success, sopt->sopt_valsize * is set to however much we actually retrieved. */ - if ((valsize = sopt->sopt_valsize) < minlen) - return (EINVAL); - if (valsize > len) + if ((valsize = sopt->sopt_valsize) < minlen) { + return EINVAL; + } + if (valsize > len) { sopt->sopt_valsize = valsize = len; + } - if (sopt->sopt_p != kernproc) - return (copyin(sopt->sopt_val, buf, valsize)); + if (sopt->sopt_p != kernproc) { + return copyin(sopt->sopt_val, buf, valsize); + } bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), buf, valsize); - return (0); + return 0; } /* @@ -4161,44 +4843,48 @@ sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen) static int sooptcopyin_timeval(struct sockopt *sopt, struct timeval *tv_p) { - int error; + int error; if (proc_is64bit(sopt->sopt_p)) { - struct user64_timeval tv64; + struct user64_timeval tv64; - if (sopt->sopt_valsize < sizeof (tv64)) - return (EINVAL); + if (sopt->sopt_valsize < sizeof(tv64)) { + return EINVAL; + } - sopt->sopt_valsize = sizeof (tv64); + sopt->sopt_valsize = sizeof(tv64); if (sopt->sopt_p != kernproc) { - error = copyin(sopt->sopt_val, &tv64, sizeof (tv64)); - if (error != 0) - return (error); + error = copyin(sopt->sopt_val, &tv64, sizeof(tv64)); + if (error != 0) { + return error; + } } else { bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), &tv64, - sizeof (tv64)); + sizeof(tv64)); } if (tv64.tv_sec < 0 || tv64.tv_sec > LONG_MAX || - tv64.tv_usec < 0 || tv64.tv_usec >= 1000000) - return (EDOM); + tv64.tv_usec < 0 || tv64.tv_usec >= 1000000) { + return EDOM; + } tv_p->tv_sec = tv64.tv_sec; tv_p->tv_usec = tv64.tv_usec; } else { - struct user32_timeval tv32; + struct user32_timeval tv32; - if (sopt->sopt_valsize < sizeof (tv32)) - return (EINVAL); + if (sopt->sopt_valsize < sizeof(tv32)) { + return EINVAL; + } - sopt->sopt_valsize = sizeof (tv32); + sopt->sopt_valsize = sizeof(tv32); if (sopt->sopt_p != kernproc) { - error = copyin(sopt->sopt_val, &tv32, sizeof (tv32)); + error = copyin(sopt->sopt_val, &tv32, sizeof(tv32)); if (error != 0) { - return (error); + return error; } } else { bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), &tv32, - sizeof (tv32)); + sizeof(tv32)); } #ifndef __LP64__ /* @@ -4206,13 +4892,46 @@ sooptcopyin_timeval(struct sockopt *sopt, struct timeval *tv_p) * limited range of data type" */ if (tv32.tv_sec < 0 || tv32.tv_sec > LONG_MAX || - tv32.tv_usec < 0 || tv32.tv_usec >= 1000000) - return (EDOM); + tv32.tv_usec < 0 || tv32.tv_usec >= 1000000) { + return EDOM; + } #endif tv_p->tv_sec = tv32.tv_sec; tv_p->tv_usec = tv32.tv_usec; } - return (0); + return 0; +} + +int +soopt_cred_check(struct socket *so, int priv, boolean_t allow_root, + boolean_t ignore_delegate) +{ + kauth_cred_t cred = NULL; + proc_t ep = PROC_NULL; + uid_t uid; + int error = 0; + + if (ignore_delegate == false && so->so_flags & SOF_DELEGATED) { + ep = proc_find(so->e_pid); + if (ep) { + cred = kauth_cred_proc_ref(ep); + } + } + + uid = kauth_cred_getuid(cred ? cred : so->so_cred); + + /* uid is 0 for root */ + if (uid != 0 || !allow_root) { + error = priv_check_cred(cred ? cred : so->so_cred, priv, 0); + } + if (cred) { + kauth_cred_unref(&cred); + } + if (ep != PROC_NULL) { + proc_rele(ep); + } + + return error; } /* @@ -4238,18 +4957,18 @@ sooptcopyin_timeval(struct sockopt *sopt, struct timeval *tv_p) int sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) { - int error, optval; - struct linger l; - struct timeval tv; -#if CONFIG_MACF_SOCKET - struct mac extmac; -#endif /* MAC_SOCKET */ - - if (sopt->sopt_dir != SOPT_SET) + int error, optval; + int64_t long_optval; + struct linger l; + struct timeval tv; + + if (sopt->sopt_dir != SOPT_SET) { sopt->sopt_dir = SOPT_SET; + } - if (dolock) + if (dolock) { socket_lock(so, 1); + } if ((so->so_state & (SS_CANTRCVMORE | SS_CANTSENDMORE)) == (SS_CANTRCVMORE | SS_CANTSENDMORE) && @@ -4261,8 +4980,9 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) error = sflt_setsockopt(so, sopt); if (error != 0) { - if (error == EJUSTRETURN) + if (error == EJUSTRETURN) { error = 0; + } goto out; } @@ -4282,23 +5002,26 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) * return value indicates that the option is unsupported. */ if (so->so_proto != NULL && (error = so->so_proto->pr_usrreqs-> - pru_socheckopt(so, sopt)) != 0) + pru_socheckopt(so, sopt)) != 0) { goto out; + } error = 0; switch (sopt->sopt_name) { case SO_LINGER: case SO_LINGER_SEC: - error = sooptcopyin(sopt, &l, sizeof (l), sizeof (l)); - if (error != 0) + error = sooptcopyin(sopt, &l, sizeof(l), sizeof(l)); + if (error != 0) { goto out; + } so->so_linger = (sopt->sopt_name == SO_LINGER) ? l.l_linger : l.l_linger * hz; - if (l.l_onoff != 0) + if (l.l_onoff != 0) { so->so_options |= SO_LINGER; - else + } else { so->so_options &= ~SO_LINGER; + } break; case SO_DEBUG: @@ -4311,28 +5034,33 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) case SO_OOBINLINE: case SO_TIMESTAMP: case SO_TIMESTAMP_MONOTONIC: + case SO_TIMESTAMP_CONTINUOUS: case SO_DONTTRUNC: case SO_WANTMORE: case SO_WANTOOBFLAG: case SO_NOWAKEFROMSLEEP: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + case SO_NOAPNFALLBK: + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval) + } + if (optval) { so->so_options |= sopt->sopt_name; - else + } else { so->so_options &= ~sopt->sopt_name; + } break; case SO_SNDBUF: case SO_RCVBUF: case SO_SNDLOWAT: case SO_RCVLOWAT: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; + } /* * Values < 1 make no sense for any of these @@ -4369,7 +5097,8 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) if (so->so_snd.sb_flags & SB_UNIX) { struct unpcb *unp = (struct unpcb *)(so->so_pcb); - if (unp != NULL && unp->unp_conn != NULL) { + if (unp != NULL && + unp->unp_conn != NULL) { hiwat += unp->unp_conn->unp_cc; } } @@ -4382,16 +5111,17 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) sowwakeup(so); } break; - } + } case SO_RCVLOWAT: { int64_t data_len; so->so_rcv.sb_lowat = (optval > so->so_rcv.sb_hiwat) ? so->so_rcv.sb_hiwat : optval; - data_len = so->so_rcv.sb_cc + data_len = so->so_rcv.sb_cc - so->so_rcv.sb_ctl; - if (data_len >= so->so_rcv.sb_lowat) - sorwakeup(so); + if (data_len >= so->so_rcv.sb_lowat) { + sorwakeup(so); + } break; } } @@ -4400,8 +5130,9 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) case SO_SNDTIMEO: case SO_RCVTIMEO: error = sooptcopyin_timeval(sopt, &tv); - if (error != 0) + if (error != 0) { goto out; + } switch (sopt->sopt_name) { case SO_SNDTIMEO: @@ -4416,46 +5147,53 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) case SO_NKE: { struct so_nke nke; - error = sooptcopyin(sopt, &nke, sizeof (nke), - sizeof (nke)); - if (error != 0) + error = sooptcopyin(sopt, &nke, sizeof(nke), + sizeof(nke)); + if (error != 0) { goto out; + } error = sflt_attach_internal(so, nke.nke_handle); break; } case SO_NOSIGPIPE: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval != 0) + } + if (optval != 0) { so->so_flags |= SOF_NOSIGPIPE; - else + } else { so->so_flags &= ~SOF_NOSIGPIPE; + } break; case SO_NOADDRERR: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval != 0) + } + if (optval != 0) { so->so_flags |= SOF_NOADDRAVAIL; - else + } else { so->so_flags &= ~SOF_NOADDRAVAIL; + } break; case SO_REUSESHAREUID: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval != 0) + } + if (optval != 0) { so->so_flags |= SOF_REUSESHAREUID; - else + } else { so->so_flags &= ~SOF_REUSESHAREUID; + } break; case SO_NOTIFYCONFLICT: @@ -4463,21 +5201,24 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) error = EPERM; goto out; } - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval != 0) + } + if (optval != 0) { so->so_flags |= SOF_NOTIFYCONFLICT; - else + } else { so->so_flags &= ~SOF_NOTIFYCONFLICT; + } break; case SO_RESTRICTIONS: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; + } error = so_set_restrictions(so, optval); break; @@ -4490,73 +5231,81 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) } error = sooptcopyin(sopt, &optval, sizeof(optval), sizeof(optval)); - if (error != 0) + if (error != 0) { goto out; + } if (optval != 0) { - kauth_cred_t cred = NULL; - proc_t ep = PROC_NULL; - - if (so->so_flags & SOF_DELEGATED) { - ep = proc_find(so->e_pid); - if (ep) - cred = kauth_cred_proc_ref(ep); - } - error = priv_check_cred( - cred ? cred : so->so_cred, - PRIV_NET_RESTRICTED_AWDL, 0); - if (error == 0) + error = soopt_cred_check(so, + PRIV_NET_RESTRICTED_AWDL, false, false); + if (error == 0) { inp_set_awdl_unrestricted( - sotoinpcb(so)); - if (cred) - kauth_cred_unref(&cred); - if (ep != PROC_NULL) - proc_rele(ep); - } else + sotoinpcb(so)); + } + } else { inp_clear_awdl_unrestricted(sotoinpcb(so)); + } break; - - case SO_LABEL: -#if CONFIG_MACF_SOCKET - if ((error = sooptcopyin(sopt, &extmac, sizeof (extmac), - sizeof (extmac))) != 0) + case SO_INTCOPROC_ALLOW: + if (SOCK_DOM(so) != PF_INET6) { + error = EOPNOTSUPP; + goto out; + } + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; + } + if (optval != 0 && + inp_get_intcoproc_allowed(sotoinpcb(so)) == FALSE) { + error = soopt_cred_check(so, + PRIV_NET_RESTRICTED_INTCOPROC, false, false); + if (error == 0) { + inp_set_intcoproc_allowed( + sotoinpcb(so)); + } + } else if (optval == 0) { + inp_clear_intcoproc_allowed(sotoinpcb(so)); + } + break; - error = mac_setsockopt_label(proc_ucred(sopt->sopt_p), - so, &extmac); -#else + case SO_LABEL: error = EOPNOTSUPP; -#endif /* MAC_SOCKET */ break; case SO_UPCALLCLOSEWAIT: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval != 0) + } + if (optval != 0) { so->so_flags |= SOF_UPCALLCLOSEWAIT; - else + } else { so->so_flags &= ~SOF_UPCALLCLOSEWAIT; + } break; case SO_RANDOMPORT: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval != 0) + } + if (optval != 0) { so->so_flags |= SOF_BINDRANDOMPORT; - else + } else { so->so_flags &= ~SOF_BINDRANDOMPORT; + } break; case SO_NP_EXTENSIONS: { struct so_np_extensions sonpx; - error = sooptcopyin(sopt, &sonpx, sizeof (sonpx), - sizeof (sonpx)); - if (error != 0) + error = sooptcopyin(sopt, &sonpx, sizeof(sonpx), + sizeof(sonpx)); + if (error != 0) { goto out; + } if (sonpx.npx_mask & ~SONPX_MASK_VALID) { error = EINVAL; goto out; @@ -4565,71 +5314,101 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) * Only one bit defined for now */ if ((sonpx.npx_mask & SONPX_SETOPTSHUT)) { - if ((sonpx.npx_flags & SONPX_SETOPTSHUT)) + if ((sonpx.npx_flags & SONPX_SETOPTSHUT)) { so->so_flags |= SOF_NPX_SETOPTSHUT; - else + } else { so->so_flags &= ~SOF_NPX_SETOPTSHUT; + } } break; } case SO_TRAFFIC_CLASS: { - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { + goto out; + } + if (optval >= SO_TC_NET_SERVICE_OFFSET) { + int netsvc = optval - SO_TC_NET_SERVICE_OFFSET; + error = so_set_net_service_type(so, netsvc); goto out; + } error = so_set_traffic_class(so, optval); - if (error != 0) + if (error != 0) { goto out; + } + so->so_flags1 &= ~SOF1_TC_NET_SERV_TYPE; + so->so_netsvctype = _NET_SERVICE_TYPE_UNSPEC; break; } case SO_RECV_TRAFFIC_CLASS: { - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval == 0) + } + if (optval == 0) { so->so_flags &= ~SOF_RECV_TRAFFIC_CLASS; - else + } else { so->so_flags |= SOF_RECV_TRAFFIC_CLASS; + } break; } +#if (DEVELOPMENT || DEBUG) case SO_TRAFFIC_CLASS_DBG: { struct so_tcdbg so_tcdbg; error = sooptcopyin(sopt, &so_tcdbg, - sizeof (struct so_tcdbg), sizeof (struct so_tcdbg)); - if (error != 0) + sizeof(struct so_tcdbg), sizeof(struct so_tcdbg)); + if (error != 0) { goto out; + } error = so_set_tcdbg(so, &so_tcdbg); - if (error != 0) + if (error != 0) { goto out; + } break; } +#endif /* (DEVELOPMENT || DEBUG) */ case SO_PRIVILEGED_TRAFFIC_CLASS: error = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_TRAFFIC_CLASS, 0); - if (error != 0) + if (error != 0) { goto out; - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + } + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { goto out; - if (optval == 0) + } + if (optval == 0) { so->so_flags &= ~SOF_PRIVILEGED_TRAFFIC_CLASS; - else + } else { so->so_flags |= SOF_PRIVILEGED_TRAFFIC_CLASS; + } + break; + +#if (DEVELOPMENT || DEBUG) + case SO_DEFUNCTIT: + error = sosetdefunct(current_proc(), so, 0, FALSE); + if (error == 0) { + error = sodefunct(current_proc(), so, 0); + } + break; +#endif /* (DEVELOPMENT || DEBUG) */ case SO_DEFUNCTOK: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); if (error != 0 || (so->so_flags & SOF_DEFUNCT)) { - if (error == 0) + if (error == 0) { error = EBADF; + } goto out; } /* @@ -4642,10 +5421,11 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) error = EPERM; goto out; } - if (optval) + if (optval) { so->so_flags &= ~SOF_NODEFUNCT; - else + } else { so->so_flags |= SOF_NODEFUNCT; + } if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { @@ -4653,31 +5433,35 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) char d[MAX_IPv6_STR_LEN]; struct inpcb *inp = sotoinpcb(so); - SODEFUNCTLOG(("%s[%d]: so 0x%llx [%s %s:%d -> " - "%s:%d] is now marked as %seligible for " + SODEFUNCTLOG("%s[%d, %s]: so 0x%llx " + "[%s %s:%d -> %s:%d] is now marked " + "as %seligible for " "defunct\n", __func__, proc_selfpid(), - (uint64_t)VM_KERNEL_ADDRPERM(so), + proc_best_name(current_proc()), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), (SOCK_TYPE(so) == SOCK_STREAM) ? "TCP" : "UDP", inet_ntop(SOCK_DOM(so), ((SOCK_DOM(so) == PF_INET) ? (void *)&inp->inp_laddr.s_addr : - (void *)&inp->in6p_laddr), s, sizeof (s)), + (void *)&inp->in6p_laddr), s, sizeof(s)), ntohs(inp->in6p_lport), inet_ntop(SOCK_DOM(so), (SOCK_DOM(so) == PF_INET) ? (void *)&inp->inp_faddr.s_addr : - (void *)&inp->in6p_faddr, d, sizeof (d)), + (void *)&inp->in6p_faddr, d, sizeof(d)), ntohs(inp->in6p_fport), (so->so_flags & SOF_NODEFUNCT) ? - "not " : "")); + "not " : ""); } else { - SODEFUNCTLOG(("%s[%d]: so 0x%llx [%d,%d] is " - "now marked as %seligible for defunct\n", + SODEFUNCTLOG("%s[%d, %s]: so 0x%llx [%d,%d] " + "is now marked as %seligible for " + "defunct\n", __func__, proc_selfpid(), - (uint64_t)VM_KERNEL_ADDRPERM(so), + proc_best_name(current_proc()), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), SOCK_DOM(so), SOCK_TYPE(so), (so->so_flags & SOF_NODEFUNCT) ? - "not " : "")); + "not " : ""); } break; @@ -4687,10 +5471,11 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) break; case SO_OPPORTUNISTIC: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error == 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error == 0) { error = so_set_opportunistic(so, optval); + } break; case SO_FLUSH: @@ -4699,10 +5484,11 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) break; case SO_RECV_ANYIF: - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error == 0) + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error == 0) { error = so_set_recv_anyif(so, optval); + } break; case SO_TRAFFIC_MGT_BACKGROUND: { @@ -4715,80 +5501,242 @@ sosetoptlock(struct socket *so, struct sockopt *sopt, int dolock) case SO_FLOW_DIVERT_TOKEN: error = flow_divert_token_set(so, sopt); break; -#endif /* FLOW_DIVERT */ +#endif /* FLOW_DIVERT */ case SO_DELEGATED: - if ((error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval))) != 0) + if ((error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval))) != 0) { break; + } - error = so_set_effective_pid(so, optval, sopt->sopt_p); + error = so_set_effective_pid(so, optval, sopt->sopt_p, true); break; case SO_DELEGATED_UUID: { uuid_t euuid; - if ((error = sooptcopyin(sopt, &euuid, sizeof (euuid), - sizeof (euuid))) != 0) + if ((error = sooptcopyin(sopt, &euuid, sizeof(euuid), + sizeof(euuid))) != 0) { break; + } - error = so_set_effective_uuid(so, euuid, sopt->sopt_p); + error = so_set_effective_uuid(so, euuid, sopt->sopt_p, true); break; } - + #if NECP case SO_NECP_ATTRIBUTES: error = necp_set_socket_attributes(so, sopt); break; -#endif /* NECP */ -#if MPTCP - case SO_MPTCP_FASTJOIN: - if (!((so->so_flags & SOF_MP_SUBFLOW) || - ((SOCK_CHECK_DOM(so, PF_MULTIPATH)) && - (SOCK_CHECK_PROTO(so, IPPROTO_TCP))))) { - error = ENOPROTOOPT; + case SO_NECP_CLIENTUUID: { + if (SOCK_DOM(so) == PF_MULTIPATH) { + /* Handled by MPTCP itself */ break; } - error = sooptcopyin(sopt, &optval, sizeof (optval), - sizeof (optval)); - if (error != 0) + if (SOCK_DOM(so) != PF_INET && SOCK_DOM(so) != PF_INET6) { + error = EINVAL; goto out; - if (optval == 0) - so->so_flags &= ~SOF_MPTCP_FASTJOIN; - else - so->so_flags |= SOF_MPTCP_FASTJOIN; - break; -#endif /* MPTCP */ + } + + struct inpcb *inp = sotoinpcb(so); + if (!uuid_is_null(inp->necp_client_uuid)) { + // Clear out the old client UUID if present + necp_inpcb_remove_cb(inp); + } + + error = sooptcopyin(sopt, &inp->necp_client_uuid, + sizeof(uuid_t), sizeof(uuid_t)); + if (error != 0) { + goto out; + } + + if (uuid_is_null(inp->necp_client_uuid)) { + error = EINVAL; + goto out; + } + + pid_t current_pid = proc_pid(current_proc()); + error = necp_client_register_socket_flow(current_pid, + inp->necp_client_uuid, inp); + if (error != 0) { + uuid_clear(inp->necp_client_uuid); + goto out; + } + + if (inp->inp_lport != 0) { + // There is a bound local port, so this is not + // a fresh socket. Assign to the client. + necp_client_assign_from_socket(current_pid, inp->necp_client_uuid, inp); + } - default: - error = ENOPROTOOPT; break; } - if (error == 0 && so->so_proto != NULL && - so->so_proto->pr_ctloutput != NULL) { - (void) so->so_proto->pr_ctloutput(so, sopt); - } - } -out: - if (dolock) - socket_unlock(so, 1); - return (error); -} + case SO_NECP_LISTENUUID: { + if (SOCK_DOM(so) != PF_INET && SOCK_DOM(so) != PF_INET6) { + error = EINVAL; + goto out; + } -/* Helper routines for getsockopt */ -int -sooptcopyout(struct sockopt *sopt, void *buf, size_t len) -{ - int error; - size_t valsize; + struct inpcb *inp = sotoinpcb(so); + if (!uuid_is_null(inp->necp_client_uuid)) { + error = EINVAL; + goto out; + } - error = 0; + error = sooptcopyin(sopt, &inp->necp_client_uuid, + sizeof(uuid_t), sizeof(uuid_t)); + if (error != 0) { + goto out; + } - /* - * Documented get behavior is that we always return a value, + if (uuid_is_null(inp->necp_client_uuid)) { + error = EINVAL; + goto out; + } + + error = necp_client_register_socket_listener(proc_pid(current_proc()), + inp->necp_client_uuid, inp); + if (error != 0) { + uuid_clear(inp->necp_client_uuid); + goto out; + } + + // Mark that the port registration is held by NECP + inp->inp_flags2 |= INP2_EXTERNAL_PORT; + + break; + } +#endif /* NECP */ + + case SO_EXTENDED_BK_IDLE: + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error == 0) { + error = so_set_extended_bk_idle(so, optval); + } + break; + + case SO_MARK_CELLFALLBACK: + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { + goto out; + } + if (optval < 0) { + error = EINVAL; + goto out; + } + if (optval == 0) { + so->so_flags1 &= ~SOF1_CELLFALLBACK; + } else { + so->so_flags1 |= SOF1_CELLFALLBACK; + } + break; + + case SO_STATISTICS_EVENT: + error = sooptcopyin(sopt, &long_optval, + sizeof(long_optval), sizeof(long_optval)); + if (error != 0) { + goto out; + } + u_int64_t nstat_event = 0; + error = so_statistics_event_to_nstat_event( + &long_optval, &nstat_event); + if (error != 0) { + goto out; + } + nstat_pcb_event(sotoinpcb(so), nstat_event); + break; + + case SO_NET_SERVICE_TYPE: { + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { + goto out; + } + error = so_set_net_service_type(so, optval); + break; + } + + case SO_QOSMARKING_POLICY_OVERRIDE: + error = priv_check_cred(kauth_cred_get(), + PRIV_NET_QOSMARKING_POLICY_OVERRIDE, 0); + if (error != 0) { + goto out; + } + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { + goto out; + } + if (optval == 0) { + so->so_flags1 &= ~SOF1_QOSMARKING_POLICY_OVERRIDE; + } else { + so->so_flags1 |= SOF1_QOSMARKING_POLICY_OVERRIDE; + } + break; + + case SO_MPKL_SEND_INFO: { + struct so_mpkl_send_info so_mpkl_send_info; + + error = sooptcopyin(sopt, &so_mpkl_send_info, + sizeof(struct so_mpkl_send_info), sizeof(struct so_mpkl_send_info)); + if (error != 0) { + goto out; + } + uuid_copy(so->so_mpkl_send_uuid, so_mpkl_send_info.mpkl_uuid); + so->so_mpkl_send_proto = so_mpkl_send_info.mpkl_proto; + + if (uuid_is_null(so->so_mpkl_send_uuid) && so->so_mpkl_send_proto == 0) { + so->so_flags1 &= ~SOF1_MPKL_SEND_INFO; + } else { + so->so_flags1 |= SOF1_MPKL_SEND_INFO; + } + break; + } + case SO_WANT_KEV_SOCKET_CLOSED: { + error = sooptcopyin(sopt, &optval, sizeof(optval), + sizeof(optval)); + if (error != 0) { + goto out; + } + if (optval == 0) { + so->so_flags1 &= ~SOF1_WANT_KEV_SOCK_CLOSED; + } else { + so->so_flags1 |= SOF1_WANT_KEV_SOCK_CLOSED; + } + break; + } + default: + error = ENOPROTOOPT; + break; + } + if (error == 0 && so->so_proto != NULL && + so->so_proto->pr_ctloutput != NULL) { + (void) so->so_proto->pr_ctloutput(so, sopt); + } + } +out: + if (dolock) { + socket_unlock(so, 1); + } + return error; +} + +/* Helper routines for getsockopt */ +int +sooptcopyout(struct sockopt *sopt, void *buf, size_t len) +{ + int error; + size_t valsize; + + error = 0; + + /* + * Documented get behavior is that we always return a value, * possibly truncated to fit in the user's buffer. * Traditional behavior is that we always tell the user * precisely how much we copied, rather than something useful @@ -4799,32 +5747,33 @@ sooptcopyout(struct sockopt *sopt, void *buf, size_t len) valsize = min(len, sopt->sopt_valsize); sopt->sopt_valsize = valsize; if (sopt->sopt_val != USER_ADDR_NULL) { - if (sopt->sopt_p != kernproc) + if (sopt->sopt_p != kernproc) { error = copyout(buf, sopt->sopt_val, valsize); - else + } else { bcopy(buf, CAST_DOWN(caddr_t, sopt->sopt_val), valsize); + } } - return (error); + return error; } static int sooptcopyout_timeval(struct sockopt *sopt, const struct timeval *tv_p) { - int error; - size_t len; - struct user64_timeval tv64; - struct user32_timeval tv32; - const void * val; - size_t valsize; + int error; + size_t len; + struct user64_timeval tv64 = {}; + struct user32_timeval tv32 = {}; + const void * val; + size_t valsize; error = 0; if (proc_is64bit(sopt->sopt_p)) { - len = sizeof (tv64); + len = sizeof(tv64); tv64.tv_sec = tv_p->tv_sec; tv64.tv_usec = tv_p->tv_usec; val = &tv64; } else { - len = sizeof (tv32); + len = sizeof(tv32); tv32.tv_sec = tv_p->tv_sec; tv32.tv_usec = tv_p->tv_usec; val = &tv32; @@ -4832,12 +5781,13 @@ sooptcopyout_timeval(struct sockopt *sopt, const struct timeval *tv_p) valsize = min(len, sopt->sopt_valsize); sopt->sopt_valsize = valsize; if (sopt->sopt_val != USER_ADDR_NULL) { - if (sopt->sopt_p != kernproc) + if (sopt->sopt_p != kernproc) { error = copyout(val, sopt->sopt_val, valsize); - else + } else { bcopy(val, CAST_DOWN(caddr_t, sopt->sopt_val), valsize); + } } - return (error); + return error; } /* @@ -4850,23 +5800,23 @@ sooptcopyout_timeval(struct sockopt *sopt, const struct timeval *tv_p) int sogetoptlock(struct socket *so, struct sockopt *sopt, int dolock) { - int error, optval; - struct linger l; - struct timeval tv; -#if CONFIG_MACF_SOCKET - struct mac extmac; -#endif /* MAC_SOCKET */ - - if (sopt->sopt_dir != SOPT_GET) + int error, optval; + struct linger l; + struct timeval tv; + + if (sopt->sopt_dir != SOPT_GET) { sopt->sopt_dir = SOPT_GET; + } - if (dolock) + if (dolock) { socket_lock(so, 1); + } error = sflt_getsockopt(so, sopt); if (error != 0) { - if (error == EJUSTRETURN) + if (error == EJUSTRETURN) { error = 0; + } goto out; } @@ -4886,8 +5836,9 @@ sogetoptlock(struct socket *so, struct sockopt *sopt, int dolock) * return value indicates that the option is unsupported. */ if (so->so_proto != NULL && (error = so->so_proto->pr_usrreqs-> - pru_socheckopt(so, sopt)) != 0) + pru_socheckopt(so, sopt)) != 0) { goto out; + } error = 0; switch (sopt->sopt_name) { @@ -4896,7 +5847,7 @@ sogetoptlock(struct socket *so, struct sockopt *sopt, int dolock) l.l_onoff = ((so->so_options & SO_LINGER) ? 1 : 0); l.l_linger = (sopt->sopt_name == SO_LINGER) ? so->so_linger : so->so_linger / hz; - error = sooptcopyout(sopt, &l, sizeof (l)); + error = sooptcopyout(sopt, &l, sizeof(l)); break; case SO_USELOOPBACK: @@ -4909,13 +5860,15 @@ sogetoptlock(struct socket *so, struct sockopt *sopt, int dolock) case SO_OOBINLINE: case SO_TIMESTAMP: case SO_TIMESTAMP_MONOTONIC: + case SO_TIMESTAMP_CONTINUOUS: case SO_DONTTRUNC: case SO_WANTMORE: case SO_WANTOOBFLAG: case SO_NOWAKEFROMSLEEP: + case SO_NOAPNFALLBK: optval = so->so_options & sopt->sopt_name; integer: - error = sooptcopyout(sopt, &optval, sizeof (optval)); + error = sooptcopyout(sopt, &optval, sizeof(optval)); break; case SO_TYPE: @@ -4932,8 +5885,9 @@ integer: while (m1 != NULL) { if (m1->m_type == MT_DATA || m1->m_type == MT_HEADER || - m1->m_type == MT_OOBDATA) + m1->m_type == MT_OOBDATA) { pkt_total += m1->m_len; + } m1 = m1->m_next; } optval = pkt_total; @@ -4949,16 +5903,13 @@ integer: m1 = so->so_rcv.sb_mb; while (m1 != NULL) { - if (m1->m_type == MT_DATA || - m1->m_type == MT_HEADER || - m1->m_type == MT_OOBDATA) - cnt += 1; + cnt += 1; m1 = m1->m_nextpkt; } optval = cnt; goto integer; } else { - error = EINVAL; + error = ENOPROTOOPT; break; } @@ -5027,41 +5978,32 @@ integer: goto integer; case SO_AWDL_UNRESTRICTED: - if (SOCK_DOM(so) == PF_INET || + if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { optval = inp_get_awdl_unrestricted( - sotoinpcb(so)); + sotoinpcb(so)); goto integer; - } else + } else { error = EOPNOTSUPP; + } break; - case SO_LABEL: -#if CONFIG_MACF_SOCKET - if ((error = sooptcopyin(sopt, &extmac, sizeof (extmac), - sizeof (extmac))) != 0 || - (error = mac_socket_label_get(proc_ucred( - sopt->sopt_p), so, &extmac)) != 0) - break; + case SO_INTCOPROC_ALLOW: + if (SOCK_DOM(so) == PF_INET6) { + optval = inp_get_intcoproc_allowed( + sotoinpcb(so)); + goto integer; + } else { + error = EOPNOTSUPP; + } + break; - error = sooptcopyout(sopt, &extmac, sizeof (extmac)); -#else + case SO_LABEL: error = EOPNOTSUPP; -#endif /* MAC_SOCKET */ break; case SO_PEERLABEL: -#if CONFIG_MACF_SOCKET - if ((error = sooptcopyin(sopt, &extmac, sizeof (extmac), - sizeof (extmac))) != 0 || - (error = mac_socketpeer_label_get(proc_ucred( - sopt->sopt_p), so, &extmac)) != 0) - break; - - error = sooptcopyout(sopt, &extmac, sizeof (extmac)); -#else error = EOPNOTSUPP; -#endif /* MAC_SOCKET */ break; #ifdef __APPLE_API_PRIVATE @@ -5074,14 +6016,14 @@ integer: goto integer; case SO_NP_EXTENSIONS: { - struct so_np_extensions sonpx; + struct so_np_extensions sonpx = {}; sonpx.npx_flags = (so->so_flags & SOF_NPX_SETOPTSHUT) ? SONPX_SETOPTSHUT : 0; sonpx.npx_mask = SONPX_MASK_VALID; error = sooptcopyout(sopt, &sonpx, - sizeof (struct so_np_extensions)); + sizeof(struct so_np_extensions)); break; } @@ -5093,14 +6035,11 @@ integer: optval = (so->so_flags & SOF_RECV_TRAFFIC_CLASS); goto integer; - case SO_TRAFFIC_CLASS_STATS: - error = sooptcopyout(sopt, &so->so_tc_stats, - sizeof (so->so_tc_stats)); - break; - +#if (DEVELOPMENT || DEBUG) case SO_TRAFFIC_CLASS_DBG: error = sogetopt_tcdbg(so, sopt); break; +#endif /* (DEVELOPMENT || DEBUG) */ case SO_PRIVILEGED_TRAFFIC_CLASS: optval = (so->so_flags & SOF_PRIVILEGED_TRAFFIC_CLASS); @@ -5139,12 +6078,47 @@ integer: case SO_FLOW_DIVERT_TOKEN: error = flow_divert_token_get(so, sopt); break; -#endif /* FLOW_DIVERT */ - +#endif /* FLOW_DIVERT */ + #if NECP case SO_NECP_ATTRIBUTES: error = necp_get_socket_attributes(so, sopt); break; + + case SO_NECP_CLIENTUUID: { + uuid_t *ncu; + + if (SOCK_DOM(so) == PF_MULTIPATH) { + ncu = &mpsotomppcb(so)->necp_client_uuid; + } else if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { + ncu = &sotoinpcb(so)->necp_client_uuid; + } else { + error = EINVAL; + goto out; + } + + error = sooptcopyout(sopt, ncu, sizeof(uuid_t)); + break; + } + + case SO_NECP_LISTENUUID: { + uuid_t *nlu; + + if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { + if (sotoinpcb(so)->inp_flags2 & INP2_EXTERNAL_PORT) { + nlu = &sotoinpcb(so)->necp_client_uuid; + } else { + error = ENOENT; + goto out; + } + } else { + error = EINVAL; + goto out; + } + + error = sooptcopyout(sopt, nlu, sizeof(uuid_t)); + break; + } #endif /* NECP */ #if CONTENT_FILTER @@ -5153,33 +6127,50 @@ integer: sock_id = cfil_sock_id_from_socket(so); - error = sooptcopyout(sopt, &sock_id, - sizeof(cfil_sock_id_t)); + error = sooptcopyout(sopt, &sock_id, + sizeof(cfil_sock_id_t)); break; } -#endif /* CONTENT_FILTER */ +#endif /* CONTENT_FILTER */ -#if MPTCP - case SO_MPTCP_FASTJOIN: - if (!((so->so_flags & SOF_MP_SUBFLOW) || - ((SOCK_CHECK_DOM(so, PF_MULTIPATH)) && - (SOCK_CHECK_PROTO(so, IPPROTO_TCP))))) { - error = ENOPROTOOPT; - break; + case SO_EXTENDED_BK_IDLE: + optval = (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED); + goto integer; + case SO_MARK_CELLFALLBACK: + optval = ((so->so_flags1 & SOF1_CELLFALLBACK) > 0) + ? 1 : 0; + goto integer; + case SO_NET_SERVICE_TYPE: { + if ((so->so_flags1 & SOF1_TC_NET_SERV_TYPE)) { + optval = so->so_netsvctype; + } else { + optval = NET_SERVICE_TYPE_BE; } - optval = (so->so_flags & SOF_MPTCP_FASTJOIN); - break; -#endif /* MPTCP */ + goto integer; + } + case SO_NETSVC_MARKING_LEVEL: + optval = so_get_netsvc_marking_level(so); + goto integer; + case SO_MPKL_SEND_INFO: { + struct so_mpkl_send_info so_mpkl_send_info; + + uuid_copy(so_mpkl_send_info.mpkl_uuid, so->so_mpkl_send_uuid); + so_mpkl_send_info.mpkl_proto = so->so_mpkl_send_proto; + error = sooptcopyout(sopt, &so_mpkl_send_info, + sizeof(struct so_mpkl_send_info)); + break; + } default: error = ENOPROTOOPT; break; } } out: - if (dolock) + if (dolock) { socket_unlock(so, 1); - return (error); + } + return error; } /* @@ -5194,18 +6185,20 @@ soopt_getm(struct sockopt *sopt, struct mbuf **mp) int sopt_size = sopt->sopt_valsize; int how; - if (sopt_size <= 0 || sopt_size > MCLBYTES) - return (EMSGSIZE); + if (sopt_size <= 0 || sopt_size > MCLBYTES) { + return EMSGSIZE; + } how = sopt->sopt_p != kernproc ? M_WAIT : M_DONTWAIT; MGET(m, how, MT_DATA); - if (m == NULL) - return (ENOBUFS); + if (m == NULL) { + return ENOBUFS; + } if (sopt_size > MLEN) { MCLGET(m, how); if ((m->m_flags & M_EXT) == 0) { m_free(m); - return (ENOBUFS); + return ENOBUFS; } m->m_len = min(MCLBYTES, sopt_size); } else { @@ -5219,14 +6212,14 @@ soopt_getm(struct sockopt *sopt, struct mbuf **mp) MGET(m, how, MT_DATA); if (m == NULL) { m_freem(*mp); - return (ENOBUFS); + return ENOBUFS; } if (sopt_size > MLEN) { MCLGET(m, how); if ((m->m_flags & M_EXT) == 0) { m_freem(*mp); m_freem(m); - return (ENOBUFS); + return ENOBUFS; } m->m_len = min(MCLBYTES, sopt_size); } else { @@ -5236,7 +6229,7 @@ soopt_getm(struct sockopt *sopt, struct mbuf **mp) m_prev->m_next = m; m_prev = m; } - return (0); + return 0; } /* copyin sopt data into mbuf chain */ @@ -5245,8 +6238,9 @@ soopt_mcopyin(struct sockopt *sopt, struct mbuf *m) { struct mbuf *m0 = m; - if (sopt->sopt_val == USER_ADDR_NULL) - return (0); + if (sopt->sopt_val == USER_ADDR_NULL) { + return 0; + } while (m != NULL && sopt->sopt_valsize >= m->m_len) { if (sopt->sopt_p != kernproc) { int error; @@ -5255,7 +6249,7 @@ soopt_mcopyin(struct sockopt *sopt, struct mbuf *m) m->m_len); if (error != 0) { m_freem(m0); - return (error); + return error; } } else { bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), @@ -5270,7 +6264,7 @@ soopt_mcopyin(struct sockopt *sopt, struct mbuf *m) panic("soopt_mcopyin"); /* NOTREACHED */ } - return (0); + return 0; } /* copyout mbuf chain data into soopt */ @@ -5280,8 +6274,9 @@ soopt_mcopyout(struct sockopt *sopt, struct mbuf *m) struct mbuf *m0 = m; size_t valsize = 0; - if (sopt->sopt_val == USER_ADDR_NULL) - return (0); + if (sopt->sopt_val == USER_ADDR_NULL) { + return 0; + } while (m != NULL && sopt->sopt_valsize >= m->m_len) { if (sopt->sopt_p != kernproc) { int error; @@ -5290,7 +6285,7 @@ soopt_mcopyout(struct sockopt *sopt, struct mbuf *m) m->m_len); if (error != 0) { m_freem(m0); - return (error); + return error; } } else { bcopy(mtod(m, char *), @@ -5304,20 +6299,25 @@ soopt_mcopyout(struct sockopt *sopt, struct mbuf *m) if (m != NULL) { /* enough soopt buffer should be given from user-land */ m_freem(m0); - return (EINVAL); + return EINVAL; } sopt->sopt_valsize = valsize; - return (0); + return 0; } void sohasoutofband(struct socket *so) { - if (so->so_pgid < 0) + if (so->so_pgid < 0) { gsignal(-so->so_pgid, SIGURG); - else if (so->so_pgid > 0) + } else if (so->so_pgid > 0) { proc_signal(so->so_pgid, SIGURG); + } selwakeup(&so->so_rcv.sb_sel); + if (so->so_rcv.sb_flags & SB_KNOTE) { + KNOTE(&so->so_rcv.sb_sel.si_note, + (NOTE_OOB | SO_FILT_HINT_LOCKED)); + } } int @@ -5331,17 +6331,23 @@ sopoll(struct socket *so, int events, kauth_cred_t cred, void * wql) so_update_last_owner_locked(so, PROC_NULL); so_update_policy(so); - if (events & (POLLIN | POLLRDNORM)) - if (soreadable(so)) + if (events & (POLLIN | POLLRDNORM)) { + if (soreadable(so)) { revents |= events & (POLLIN | POLLRDNORM); + } + } - if (events & (POLLOUT | POLLWRNORM)) - if (sowriteable(so)) + if (events & (POLLOUT | POLLWRNORM)) { + if (sowriteable(so)) { revents |= events & (POLLOUT | POLLWRNORM); + } + } - if (events & (POLLPRI | POLLRDBAND)) - if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) + if (events & (POLLPRI | POLLRDBAND)) { + if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) { revents |= events & (POLLPRI | POLLRDBAND); + } + } if (revents == 0) { if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { @@ -5364,179 +6370,220 @@ sopoll(struct socket *so, int events, kauth_cred_t cred, void * wql) } socket_unlock(so, 1); - return (revents); + return revents; } int -soo_kqfilter(struct fileproc *fp, struct knote *kn, vfs_context_t ctx) +soo_kqfilter(struct fileproc *fp, struct knote *kn, struct kevent_qos_s *kev) { -#pragma unused(fp) -#if !CONFIG_MACF_SOCKET -#pragma unused(ctx) -#endif /* MAC_SOCKET */ - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; - struct klist *skl; + struct socket *so = (struct socket *)fp->fp_glob->fg_data; + int result; socket_lock(so, 1); so_update_last_owner_locked(so, PROC_NULL); so_update_policy(so); -#if CONFIG_MACF_SOCKET - if (mac_socket_check_kqfilter(proc_ucred(vfs_context_proc(ctx)), - kn, so) != 0) { - socket_unlock(so, 1); - return (1); - } -#endif /* MAC_SOCKET */ - switch (kn->kn_filter) { case EVFILT_READ: - kn->kn_fop = &soread_filtops; - skl = &so->so_rcv.sb_sel.si_note; + kn->kn_filtid = EVFILTID_SOREAD; break; case EVFILT_WRITE: - kn->kn_fop = &sowrite_filtops; - skl = &so->so_snd.sb_sel.si_note; + kn->kn_filtid = EVFILTID_SOWRITE; break; case EVFILT_SOCK: - kn->kn_fop = &sock_filtops; - skl = &so->so_klist; + kn->kn_filtid = EVFILTID_SCK; + break; + case EVFILT_EXCEPT: + kn->kn_filtid = EVFILTID_SOEXCEPT; break; default: socket_unlock(so, 1); - return (1); - } - - if (KNOTE_ATTACH(skl, kn)) { - switch (kn->kn_filter) { - case EVFILT_READ: - so->so_rcv.sb_flags |= SB_KNOTE; - break; - case EVFILT_WRITE: - so->so_snd.sb_flags |= SB_KNOTE; - break; - case EVFILT_SOCK: - so->so_flags |= SOF_KNOTE; - break; - default: - socket_unlock(so, 1); - return (1); - } + knote_set_error(kn, EINVAL); + return 0; } - socket_unlock(so, 1); - return (0); -} -static void -filt_sordetach(struct knote *kn) -{ - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; + /* + * call the appropriate sub-filter attach + * with the socket still locked + */ + result = knote_fops(kn)->f_attach(kn, kev); - socket_lock(so, 1); - if (so->so_rcv.sb_flags & SB_KNOTE) - if (KNOTE_DETACH(&so->so_rcv.sb_sel.si_note, kn)) - so->so_rcv.sb_flags &= ~SB_KNOTE; socket_unlock(so, 1); + + return result; } -/*ARGSUSED*/ static int -filt_soread(struct knote *kn, long hint) +filt_soread_common(struct knote *kn, struct kevent_qos_s *kev, struct socket *so) { - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; - - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_lock(so, 1); + int retval = 0; + int64_t data = 0; if (so->so_options & SO_ACCEPTCONN) { - int isempty; - /* * Radar 6615193 handle the listen case dynamically * for kqueue read filter. This allows to call listen() * after registering the kqueue EVFILT_READ. */ - kn->kn_data = so->so_qlen; - isempty = ! TAILQ_EMPTY(&so->so_comp); - - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - - return (isempty); + retval = !TAILQ_EMPTY(&so->so_comp); + data = so->so_qlen; + goto out; } /* socket isn't a listener */ + /* + * NOTE_LOWAT specifies new low water mark in data, i.e. + * the bytes of protocol data. We therefore exclude any + * control bytes. + */ + data = so->so_rcv.sb_cc - so->so_rcv.sb_ctl; - kn->kn_data = so->so_rcv.sb_cc - so->so_rcv.sb_ctl; - - if (so->so_oobmark) { - if (kn->kn_flags & EV_OOBAND) { - kn->kn_data -= so->so_oobmark; - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - return (1); - } - kn->kn_data = so->so_oobmark; - kn->kn_flags |= EV_OOBAND; - } else { - if ((so->so_state & SS_CANTRCVMORE) -#if CONTENT_FILTER - && cfil_sock_data_pending(&so->so_rcv) == 0 -#endif /* CONTENT_FILTER */ - ) { - kn->kn_flags |= EV_EOF; - kn->kn_fflags = so->so_error; - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - return (1); + if (kn->kn_sfflags & NOTE_OOB) { + if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) { + kn->kn_fflags |= NOTE_OOB; + data -= so->so_oobmark; + retval = 1; + goto out; } } - if (so->so_state & SS_RCVATMARK) { - if (kn->kn_flags & EV_OOBAND) { - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - return (1); - } - kn->kn_flags |= EV_OOBAND; - } else if (kn->kn_flags & EV_OOBAND) { - kn->kn_data = 0; - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - return (0); + if ((so->so_state & SS_CANTRCVMORE) +#if CONTENT_FILTER + && cfil_sock_data_pending(&so->so_rcv) == 0 +#endif /* CONTENT_FILTER */ + ) { + kn->kn_flags |= EV_EOF; + kn->kn_fflags = so->so_error; + retval = 1; + goto out; } - if (so->so_error) { /* temporary udp error */ - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - return (1); + if (so->so_error) { /* temporary udp error */ + retval = 1; + goto out; } - int64_t lowwat = so->so_rcv.sb_lowat; + int64_t lowwat = so->so_rcv.sb_lowat; + /* + * Ensure that when NOTE_LOWAT is used, the derived + * low water mark is bounded by socket's rcv buf's + * high and low water mark values. + */ if (kn->kn_sfflags & NOTE_LOWAT) { - if (kn->kn_sdata > so->so_rcv.sb_hiwat) + if (kn->kn_sdata > so->so_rcv.sb_hiwat) { lowwat = so->so_rcv.sb_hiwat; - else if (kn->kn_sdata > lowwat) + } else if (kn->kn_sdata > lowwat) { lowwat = kn->kn_sdata; + } } - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); + /* + * While the `data` field is the amount of data to read, + * 0-sized packets need to wake up the kqueue, see 58140856, + * so we need to take control bytes into account too. + */ + retval = (so->so_rcv.sb_cc >= lowwat); - return ((kn->kn_flags & EV_OOBAND) || kn->kn_data >= lowwat); +out: + if (retval && kev) { + knote_fill_kevent(kn, kev, data); + } + return retval; +} + +static int +filt_sorattach(struct knote *kn, __unused struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + + /* socket locked */ + + /* + * If the caller explicitly asked for OOB results (e.g. poll()) + * from EVFILT_READ, then save that off in the hookid field + * and reserve the kn_flags EV_OOBAND bit for output only. + */ + if (kn->kn_filter == EVFILT_READ && + kn->kn_flags & EV_OOBAND) { + kn->kn_flags &= ~EV_OOBAND; + kn->kn_hook32 = EV_OOBAND; + } else { + kn->kn_hook32 = 0; + } + if (KNOTE_ATTACH(&so->so_rcv.sb_sel.si_note, kn)) { + so->so_rcv.sb_flags |= SB_KNOTE; + } + + /* indicate if event is already fired */ + return filt_soread_common(kn, NULL, so); } static void -filt_sowdetach(struct knote *kn) +filt_sordetach(struct knote *kn) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + + socket_lock(so, 1); + if (so->so_rcv.sb_flags & SB_KNOTE) { + if (KNOTE_DETACH(&so->so_rcv.sb_sel.si_note, kn)) { + so->so_rcv.sb_flags &= ~SB_KNOTE; + } + } + socket_unlock(so, 1); +} + +/*ARGSUSED*/ +static int +filt_soread(struct knote *kn, long hint) { - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int retval; + + if ((hint & SO_FILT_HINT_LOCKED) == 0) { + socket_lock(so, 1); + } + + retval = filt_soread_common(kn, NULL, so); + + if ((hint & SO_FILT_HINT_LOCKED) == 0) { + socket_unlock(so, 1); + } + + return retval; +} + +static int +filt_sortouch(struct knote *kn, struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int retval; + socket_lock(so, 1); - if (so->so_snd.sb_flags & SB_KNOTE) - if (KNOTE_DETACH(&so->so_snd.sb_sel.si_note, kn)) - so->so_snd.sb_flags &= ~SB_KNOTE; + /* save off the new input fflags and data */ + kn->kn_sfflags = kev->fflags; + kn->kn_sdata = kev->data; + + /* determine if changes result in fired events */ + retval = filt_soread_common(kn, NULL, so); + socket_unlock(so, 1); + + return retval; +} + +static int +filt_sorprocess(struct knote *kn, struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int retval; + + socket_lock(so, 1); + retval = filt_soread_common(kn, kev, so); + socket_unlock(so, 1); + + return retval; } int @@ -5545,50 +6592,60 @@ so_wait_for_if_feedback(struct socket *so) if ((SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) && (so->so_state & SS_ISCONNECTED)) { struct inpcb *inp = sotoinpcb(so); - if (INP_WAIT_FOR_IF_FEEDBACK(inp)) - return (1); + if (INP_WAIT_FOR_IF_FEEDBACK(inp)) { + return 1; + } } - return (0); + return 0; } -/*ARGSUSED*/ static int -filt_sowrite(struct knote *kn, long hint) +filt_sowrite_common(struct knote *kn, struct kevent_qos_s *kev, struct socket *so) { - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; int ret = 0; + int64_t data = sbspace(&so->so_snd); - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_lock(so, 1); - - kn->kn_data = sbspace(&so->so_snd); if (so->so_state & SS_CANTSENDMORE) { kn->kn_flags |= EV_EOF; kn->kn_fflags = so->so_error; ret = 1; goto out; } - if (so->so_error) { /* temporary udp error */ + + if (so->so_error) { /* temporary udp error */ ret = 1; goto out; } - if (((so->so_state & SS_ISCONNECTED) == 0) && - (so->so_proto->pr_flags & PR_CONNREQUIRED)) { + + if (!socanwrite(so)) { ret = 0; goto out; } - int64_t lowwat = so->so_snd.sb_lowat; + + if (so->so_flags1 & SOF1_PRECONNECT_DATA) { + ret = 1; + goto out; + } + + int64_t lowwat = so->so_snd.sb_lowat; + if (kn->kn_sfflags & NOTE_LOWAT) { - if (kn->kn_sdata > so->so_snd.sb_hiwat) + if (kn->kn_sdata > so->so_snd.sb_hiwat) { lowwat = so->so_snd.sb_hiwat; - else if (kn->kn_sdata > lowwat) + } else if (kn->kn_sdata > lowwat) { lowwat = kn->kn_sdata; + } } - if (kn->kn_data >= lowwat) { - if (so->so_flags & SOF_NOTSENT_LOWAT) { - if ((SOCK_DOM(so) == PF_INET - || SOCK_DOM(so) == PF_INET6) - && so->so_type == SOCK_STREAM) { + + if (data >= lowwat) { + if ((so->so_flags & SOF_NOTSENT_LOWAT) +#if (DEBUG || DEVELOPMENT) + && so_notsent_lowat_check == 1 +#endif /* DEBUG || DEVELOPMENT */ + ) { + if ((SOCK_DOM(so) == PF_INET || + SOCK_DOM(so) == PF_INET6) && + so->so_type == SOCK_STREAM) { ret = tcp_notsent_lowat_check(so); } #if MPTCP @@ -5598,128 +6655,355 @@ filt_sowrite(struct knote *kn, long hint) } #endif else { - return (1); + ret = 1; + goto out; } } else { ret = 1; } } - if (so_wait_for_if_feedback(so)) + if (so_wait_for_if_feedback(so)) { ret = 0; + } + out: - if ((hint & SO_FILT_HINT_LOCKED) == 0) - socket_unlock(so, 1); - return (ret); + if (ret && kev) { + knote_fill_kevent(kn, kev, data); + } + return ret; +} + +static int +filt_sowattach(struct knote *kn, __unused struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + + /* socket locked */ + if (KNOTE_ATTACH(&so->so_snd.sb_sel.si_note, kn)) { + so->so_snd.sb_flags |= SB_KNOTE; + } + + /* determine if its already fired */ + return filt_sowrite_common(kn, NULL, so); } static void -filt_sockdetach(struct knote *kn) +filt_sowdetach(struct knote *kn) { - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; socket_lock(so, 1); - if ((so->so_flags & SOF_KNOTE) != 0) - if (KNOTE_DETACH(&so->so_klist, kn)) - so->so_flags &= ~SOF_KNOTE; + if (so->so_snd.sb_flags & SB_KNOTE) { + if (KNOTE_DETACH(&so->so_snd.sb_sel.si_note, kn)) { + so->so_snd.sb_flags &= ~SB_KNOTE; + } + } socket_unlock(so, 1); } +/*ARGSUSED*/ static int -filt_sockev(struct knote *kn, long hint) +filt_sowrite(struct knote *kn, long hint) { - int ret = 0, locked = 0; - struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; - long ev_hint = (hint & SO_FILT_HINT_EV); + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int ret; if ((hint & SO_FILT_HINT_LOCKED) == 0) { socket_lock(so, 1); - locked = 1; } + ret = filt_sowrite_common(kn, NULL, so); + + if ((hint & SO_FILT_HINT_LOCKED) == 0) { + socket_unlock(so, 1); + } + + return ret; +} + +static int +filt_sowtouch(struct knote *kn, struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int ret; + + socket_lock(so, 1); + + /*save off the new input fflags and data */ + kn->kn_sfflags = kev->fflags; + kn->kn_sdata = kev->data; + + /* determine if these changes result in a triggered event */ + ret = filt_sowrite_common(kn, NULL, so); + + socket_unlock(so, 1); + + return ret; +} + +static int +filt_sowprocess(struct knote *kn, struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int ret; + + socket_lock(so, 1); + ret = filt_sowrite_common(kn, kev, so); + socket_unlock(so, 1); + + return ret; +} + +static int +filt_sockev_common(struct knote *kn, struct kevent_qos_s *kev, + struct socket *so, long ev_hint) +{ + int ret = 0; + int64_t data = 0; + uint32_t level_trigger = 0; + if (ev_hint & SO_FILT_HINT_CONNRESET) { - if (kn->kn_sfflags & NOTE_CONNRESET) - kn->kn_fflags |= NOTE_CONNRESET; + kn->kn_fflags |= NOTE_CONNRESET; } if (ev_hint & SO_FILT_HINT_TIMEOUT) { - if (kn->kn_sfflags & NOTE_TIMEOUT) - kn->kn_fflags |= NOTE_TIMEOUT; + kn->kn_fflags |= NOTE_TIMEOUT; } if (ev_hint & SO_FILT_HINT_NOSRCADDR) { - if (kn->kn_sfflags & NOTE_NOSRCADDR) - kn->kn_fflags |= NOTE_NOSRCADDR; + kn->kn_fflags |= NOTE_NOSRCADDR; } if (ev_hint & SO_FILT_HINT_IFDENIED) { - if ((kn->kn_sfflags & NOTE_IFDENIED)) - kn->kn_fflags |= NOTE_IFDENIED; + kn->kn_fflags |= NOTE_IFDENIED; } if (ev_hint & SO_FILT_HINT_KEEPALIVE) { - if (kn->kn_sfflags & NOTE_KEEPALIVE) - kn->kn_fflags |= NOTE_KEEPALIVE; + kn->kn_fflags |= NOTE_KEEPALIVE; } if (ev_hint & SO_FILT_HINT_ADAPTIVE_WTIMO) { - if (kn->kn_sfflags & NOTE_ADAPTIVE_WTIMO) - kn->kn_fflags |= NOTE_ADAPTIVE_WTIMO; + kn->kn_fflags |= NOTE_ADAPTIVE_WTIMO; } if (ev_hint & SO_FILT_HINT_ADAPTIVE_RTIMO) { - if (kn->kn_sfflags & NOTE_ADAPTIVE_RTIMO) - kn->kn_fflags |= NOTE_ADAPTIVE_RTIMO; + kn->kn_fflags |= NOTE_ADAPTIVE_RTIMO; } - if (ev_hint & SO_FILT_HINT_CONNECTED) { - if (kn->kn_sfflags & NOTE_CONNECTED) - kn->kn_fflags |= NOTE_CONNECTED; + if ((ev_hint & SO_FILT_HINT_CONNECTED) || + (so->so_state & SS_ISCONNECTED)) { + kn->kn_fflags |= NOTE_CONNECTED; + level_trigger |= NOTE_CONNECTED; } - if (ev_hint & SO_FILT_HINT_DISCONNECTED) { - if (kn->kn_sfflags & NOTE_DISCONNECTED) - kn->kn_fflags |= NOTE_DISCONNECTED; + if ((ev_hint & SO_FILT_HINT_DISCONNECTED) || + (so->so_state & SS_ISDISCONNECTED)) { + kn->kn_fflags |= NOTE_DISCONNECTED; + level_trigger |= NOTE_DISCONNECTED; } if (ev_hint & SO_FILT_HINT_CONNINFO_UPDATED) { if (so->so_proto != NULL && - (so->so_proto->pr_flags & PR_EVCONNINFO) && - (kn->kn_sfflags & NOTE_CONNINFO_UPDATED)) + (so->so_proto->pr_flags & PR_EVCONNINFO)) { kn->kn_fflags |= NOTE_CONNINFO_UPDATED; + } + } + + if ((ev_hint & SO_FILT_HINT_NOTIFY_ACK) || + tcp_notify_ack_active(so)) { + kn->kn_fflags |= NOTE_NOTIFY_ACK; } - if ((kn->kn_sfflags & NOTE_READCLOSED) && - (so->so_state & SS_CANTRCVMORE) + if ((so->so_state & SS_CANTRCVMORE) #if CONTENT_FILTER - && cfil_sock_data_pending(&so->so_rcv) == 0 + && cfil_sock_data_pending(&so->so_rcv) == 0 #endif /* CONTENT_FILTER */ - ) + ) { kn->kn_fflags |= NOTE_READCLOSED; + level_trigger |= NOTE_READCLOSED; + } - if ((kn->kn_sfflags & NOTE_WRITECLOSED) && - (so->so_state & SS_CANTSENDMORE)) + if (so->so_state & SS_CANTSENDMORE) { kn->kn_fflags |= NOTE_WRITECLOSED; + level_trigger |= NOTE_WRITECLOSED; + } + + if ((ev_hint & SO_FILT_HINT_SUSPEND) || + (so->so_flags & SOF_SUSPENDED)) { + kn->kn_fflags &= ~(NOTE_SUSPEND | NOTE_RESUME); + + /* If resume event was delivered before, reset it */ + kn->kn_hook32 &= ~NOTE_RESUME; + + kn->kn_fflags |= NOTE_SUSPEND; + level_trigger |= NOTE_SUSPEND; + } + + if ((ev_hint & SO_FILT_HINT_RESUME) || + (so->so_flags & SOF_SUSPENDED) == 0) { + kn->kn_fflags &= ~(NOTE_SUSPEND | NOTE_RESUME); + + /* If suspend event was delivered before, reset it */ + kn->kn_hook32 &= ~NOTE_SUSPEND; + + kn->kn_fflags |= NOTE_RESUME; + level_trigger |= NOTE_RESUME; + } + + if (so->so_error != 0) { + ret = 1; + data = so->so_error; + kn->kn_flags |= EV_EOF; + } else { + u_int32_t data32 = 0; + get_sockev_state(so, &data32); + data = data32; + } + + /* Reset any events that are not requested on this knote */ + kn->kn_fflags &= (kn->kn_sfflags & EVFILT_SOCK_ALL_MASK); + level_trigger &= (kn->kn_sfflags & EVFILT_SOCK_ALL_MASK); + + /* Find the level triggerred events that are already delivered */ + level_trigger &= kn->kn_hook32; + level_trigger &= EVFILT_SOCK_LEVEL_TRIGGER_MASK; + + /* Do not deliver level triggerred events more than once */ + if ((kn->kn_fflags & ~level_trigger) != 0) { + ret = 1; + } + + if (ret && kev) { + /* + * Store the state of the events being delivered. This + * state can be used to deliver level triggered events + * ateast once and still avoid waking up the application + * multiple times as long as the event is active. + */ + if (kn->kn_fflags != 0) { + kn->kn_hook32 |= (kn->kn_fflags & + EVFILT_SOCK_LEVEL_TRIGGER_MASK); + } + + /* + * NOTE_RESUME and NOTE_SUSPEND are an exception, deliver + * only one of them and remember the last one that was + * delivered last + */ + if (kn->kn_fflags & NOTE_SUSPEND) { + kn->kn_hook32 &= ~NOTE_RESUME; + } + if (kn->kn_fflags & NOTE_RESUME) { + kn->kn_hook32 &= ~NOTE_SUSPEND; + } + + knote_fill_kevent(kn, kev, data); + } + return ret; +} + +static int +filt_sockattach(struct knote *kn, __unused struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + + /* socket locked */ + kn->kn_hook32 = 0; + if (KNOTE_ATTACH(&so->so_klist, kn)) { + so->so_flags |= SOF_KNOTE; + } + + /* determine if event already fired */ + return filt_sockev_common(kn, NULL, so, 0); +} + +static void +filt_sockdetach(struct knote *kn) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + socket_lock(so, 1); + + if ((so->so_flags & SOF_KNOTE) != 0) { + if (KNOTE_DETACH(&so->so_klist, kn)) { + so->so_flags &= ~SOF_KNOTE; + } + } + socket_unlock(so, 1); +} + +static int +filt_sockev(struct knote *kn, long hint) +{ + int ret = 0, locked = 0; + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + long ev_hint = (hint & SO_FILT_HINT_EV); + + if ((hint & SO_FILT_HINT_LOCKED) == 0) { + socket_lock(so, 1); + locked = 1; + } + + ret = filt_sockev_common(kn, NULL, so, ev_hint); + + if (locked) { + socket_unlock(so, 1); + } + + return ret; +} + + + +/* + * filt_socktouch - update event state + */ +static int +filt_socktouch( + struct knote *kn, + struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + uint32_t changed_flags; + int ret; + + socket_lock(so, 1); + + /* save off the [result] data and fflags */ + changed_flags = (kn->kn_sfflags ^ kn->kn_hook32); + + /* save off the new input fflags and data */ + kn->kn_sfflags = kev->fflags; + kn->kn_sdata = kev->data; + + /* restrict the current results to the (smaller?) set of new interest */ + /* + * For compatibility with previous implementations, we leave kn_fflags + * as they were before. + */ + //kn->kn_fflags &= kev->fflags; + + /* + * Since we keep track of events that are already + * delivered, if any of those events are not requested + * anymore the state related to them can be reset + */ + kn->kn_hook32 &= ~(changed_flags & EVFILT_SOCK_LEVEL_TRIGGER_MASK); + + /* determine if we have events to deliver */ + ret = filt_sockev_common(kn, NULL, so, 0); + + socket_unlock(so, 1); - if ((kn->kn_sfflags & NOTE_SUSPEND) && - ((ev_hint & SO_FILT_HINT_SUSPEND) || - (so->so_flags & SOF_SUSPENDED))) { - kn->kn_fflags &= ~(NOTE_SUSPEND | NOTE_RESUME); - kn->kn_fflags |= NOTE_SUSPEND; - } + return ret; +} - if ((kn->kn_sfflags & NOTE_RESUME) && - ((ev_hint & SO_FILT_HINT_RESUME) || - (so->so_flags & SOF_SUSPENDED) == 0)) { - kn->kn_fflags &= ~(NOTE_SUSPEND | NOTE_RESUME); - kn->kn_fflags |= NOTE_RESUME; - } +/* + * filt_sockprocess - query event fired state and return data + */ +static int +filt_sockprocess(struct knote *kn, struct kevent_qos_s *kev) +{ + struct socket *so = (struct socket *)kn->kn_fp->fp_glob->fg_data; + int ret = 0; - if (so->so_error != 0) { - ret = 1; - kn->kn_data = so->so_error; - kn->kn_flags |= EV_EOF; - } else { - get_sockev_state(so, (u_int32_t *)&(kn->kn_data)); - } + socket_lock(so, 1); - if (kn->kn_fflags != 0) - ret = 1; + ret = filt_sockev_common(kn, kev, so, 0); - if (locked) - socket_unlock(so, 1); + socket_unlock(so, 1); - return (ret); + return ret; } void @@ -5727,15 +7011,24 @@ get_sockev_state(struct socket *so, u_int32_t *statep) { u_int32_t state = *(statep); - if (so->so_state & SS_ISCONNECTED) + /* + * If the state variable is already used by a previous event, + * reset it. + */ + if (state != 0) { + return; + } + + if (so->so_state & SS_ISCONNECTED) { state |= SOCKEV_CONNECTED; - else + } else { state &= ~(SOCKEV_CONNECTED); + } state |= ((so->so_state & SS_ISDISCONNECTED) ? SOCKEV_DISCONNECTED : 0); *(statep) = state; } -#define SO_LOCK_HISTORY_STR_LEN \ +#define SO_LOCK_HISTORY_STR_LEN \ (2 * SO_LCKDBG_MAX * (2 + (2 * sizeof (void *)) + 1) + 1) __private_extern__ const char * @@ -5745,64 +7038,99 @@ solockhistory_nr(struct socket *so) int i; static char lock_history_str[SO_LOCK_HISTORY_STR_LEN]; - bzero(lock_history_str, sizeof (lock_history_str)); + bzero(lock_history_str, sizeof(lock_history_str)); for (i = SO_LCKDBG_MAX - 1; i >= 0; i--) { - n += snprintf(lock_history_str + n, + n += scnprintf(lock_history_str + n, SO_LOCK_HISTORY_STR_LEN - n, "%p:%p ", so->lock_lr[(so->next_lock_lr + i) % SO_LCKDBG_MAX], so->unlock_lr[(so->next_unlock_lr + i) % SO_LCKDBG_MAX]); } - return (lock_history_str); + return lock_history_str; } -int +lck_mtx_t * +socket_getlock(struct socket *so, int flags) +{ + if (so->so_proto->pr_getlock != NULL) { + return (*so->so_proto->pr_getlock)(so, flags); + } else { + return so->so_proto->pr_domain->dom_mtx; + } +} + +void socket_lock(struct socket *so, int refcount) { - int error = 0; void *lr_saved; lr_saved = __builtin_return_address(0); if (so->so_proto->pr_lock) { - error = (*so->so_proto->pr_lock)(so, refcount, lr_saved); + (*so->so_proto->pr_lock)(so, refcount, lr_saved); } else { #ifdef MORE_LOCKING_DEBUG - lck_mtx_assert(so->so_proto->pr_domain->dom_mtx, + LCK_MTX_ASSERT(so->so_proto->pr_domain->dom_mtx, LCK_MTX_ASSERT_NOTOWNED); #endif lck_mtx_lock(so->so_proto->pr_domain->dom_mtx); - if (refcount) + if (refcount) { so->so_usecount++; + } so->lock_lr[so->next_lock_lr] = lr_saved; - so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX; + so->next_lock_lr = (so->next_lock_lr + 1) % SO_LCKDBG_MAX; + } +} + +void +socket_lock_assert_owned(struct socket *so) +{ + lck_mtx_t *mutex_held; + + if (so->so_proto->pr_getlock != NULL) { + mutex_held = (*so->so_proto->pr_getlock)(so, 0); + } else { + mutex_held = so->so_proto->pr_domain->dom_mtx; } - return (error); + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); } int +socket_try_lock(struct socket *so) +{ + lck_mtx_t *mtx; + + if (so->so_proto->pr_getlock != NULL) { + mtx = (*so->so_proto->pr_getlock)(so, 0); + } else { + mtx = so->so_proto->pr_domain->dom_mtx; + } + + return lck_mtx_try_lock(mtx); +} + +void socket_unlock(struct socket *so, int refcount) { - int error = 0; void *lr_saved; lck_mtx_t *mutex_held; lr_saved = __builtin_return_address(0); - if (so->so_proto == NULL) { + if (so == NULL || so->so_proto == NULL) { panic("%s: null so_proto so=%p\n", __func__, so); /* NOTREACHED */ } - if (so && so->so_proto->pr_unlock) { - error = (*so->so_proto->pr_unlock)(so, refcount, lr_saved); + if (so->so_proto->pr_unlock) { + (*so->so_proto->pr_unlock)(so, refcount, lr_saved); } else { mutex_held = so->so_proto->pr_domain->dom_mtx; #ifdef MORE_LOCKING_DEBUG - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); #endif so->unlock_lr[so->next_unlock_lr] = lr_saved; - so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX; + so->next_unlock_lr = (so->next_unlock_lr + 1) % SO_LCKDBG_MAX; if (refcount) { if (so->so_usecount <= 0) { @@ -5814,13 +7142,12 @@ socket_unlock(struct socket *so, int refcount) } so->so_usecount--; - if (so->so_usecount == 0) + if (so->so_usecount == 0) { sofreelastref(so, 1); + } } lck_mtx_unlock(mutex_held); } - - return (error); } /* Called with socket locked, will unlock socket */ @@ -5829,11 +7156,12 @@ sofree(struct socket *so) { lck_mtx_t *mutex_held; - if (so->so_proto->pr_getlock != NULL) + if (so->so_proto->pr_getlock != NULL) { mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else + } else { mutex_held = so->so_proto->pr_domain->dom_mtx; - lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + } + LCK_MTX_ASSERT(mutex_held, LCK_MTX_ASSERT_OWNED); sofreelastref(so, 0); } @@ -5841,8 +7169,8 @@ sofree(struct socket *so) void soreference(struct socket *so) { - socket_lock(so, 1); /* locks & take one reference on socket */ - socket_unlock(so, 0); /* unlock only */ + socket_lock(so, 1); /* locks & take one reference on socket */ + socket_unlock(so, 0); /* unlock only */ } void @@ -5860,32 +7188,35 @@ sodereference(struct socket *so) void somultipages(struct socket *so, boolean_t set) { - if (set) + if (set) { so->so_flags |= SOF_MULTIPAGES; - else + } else { so->so_flags &= ~SOF_MULTIPAGES; + } } void soif2kcl(struct socket *so, boolean_t set) { - if (set) + if (set) { so->so_flags1 |= SOF1_IF_2KCL; - else + } else { so->so_flags1 &= ~SOF1_IF_2KCL; + } } int -so_isdstlocal(struct socket *so) { - +so_isdstlocal(struct socket *so) +{ struct inpcb *inp = (struct inpcb *)so->so_pcb; - if (SOCK_DOM(so) == PF_INET) - return (inaddr_local(inp->inp_faddr)); - else if (SOCK_DOM(so) == PF_INET6) - return (in6addr_local(&inp->in6p_faddr)); + if (SOCK_DOM(so) == PF_INET) { + return inaddr_local(inp->inp_faddr); + } else if (SOCK_DOM(so) == PF_INET6) { + return in6addr_local(&inp->in6p_faddr); + } - return (0); + return 0; } int @@ -5909,18 +7240,61 @@ sosetdefunct(struct proc *p, struct socket *so, int level, boolean_t noforce) if (so->so_flags & SOF_NODEFUNCT) { if (noforce) { err = EOPNOTSUPP; - SODEFUNCTLOG(("%s[%d]: (target pid %d level %d) " - "so 0x%llx [%d,%d] is not eligible for defunct " - "(%d)\n", __func__, proc_selfpid(), proc_pid(p), - level, (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), err)); - return (err); + if (p != PROC_NULL) { + SODEFUNCTLOG("%s[%d, %s]: (target pid %d " + "name %s level %d) so 0x%llx [%d,%d] " + "is not eligible for defunct " + "(%d)\n", __func__, proc_selfpid(), + proc_best_name(current_proc()), proc_pid(p), + proc_best_name(p), level, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), err); + } + return err; } so->so_flags &= ~SOF_NODEFUNCT; - SODEFUNCTLOG(("%s[%d]: (target pid %d level %d) so 0x%llx " - "[%d,%d] defunct by force\n", __func__, proc_selfpid(), - proc_pid(p), level, (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so))); + if (p != PROC_NULL) { + SODEFUNCTLOG("%s[%d, %s]: (target pid %d " + "name %s level %d) so 0x%llx [%d,%d] " + "defunct by force " + "(%d)\n", __func__, proc_selfpid(), + proc_best_name(current_proc()), proc_pid(p), + proc_best_name(p), level, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), err); + } + } else if (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) { + struct inpcb *inp = (struct inpcb *)so->so_pcb; + struct ifnet *ifp = inp->inp_last_outifp; + + if (ifp && IFNET_IS_CELLULAR(ifp)) { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_nocell); + } else if (so->so_flags & SOF_DELEGATED) { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_nodlgtd); + } else if (soextbkidlestat.so_xbkidle_time == 0) { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_notime); + } else if (noforce && p != PROC_NULL) { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_active); + + so->so_flags1 |= SOF1_EXTEND_BK_IDLE_INPROG; + so->so_extended_bk_start = net_uptime(); + OSBitOrAtomic(P_LXBKIDLEINPROG, &p->p_ladvflag); + + inpcb_timer_sched(inp->inp_pcbinfo, INPCB_TIMER_LAZY); + + err = EOPNOTSUPP; + SODEFUNCTLOG("%s[%d, %s]: (target pid %d " + "name %s level %d) so 0x%llx [%d,%d] " + "extend bk idle " + "(%d)\n", __func__, proc_selfpid(), + proc_best_name(current_proc()), proc_pid(p), + proc_best_name(p), level, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), err); + return err; + } else { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_forced); + } } so->so_flags |= SOF_DEFUNCT; @@ -5942,12 +7316,17 @@ sosetdefunct(struct proc *p, struct socket *so, int level, boolean_t noforce) } done: - SODEFUNCTLOG(("%s[%d]: (target pid %d level %d) so 0x%llx [%d,%d] %s " - "defunct\n", __func__, proc_selfpid(), proc_pid(p), level, - (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so), SOCK_TYPE(so), - defunct ? "is already" : "marked as")); - - return (err); + if (p != PROC_NULL) { + SODEFUNCTLOG("%s[%d, %s]: (target pid %d name %s level %d) " + "so 0x%llx [%d,%d] %s defunct%s\n", __func__, + proc_selfpid(), proc_best_name(current_proc()), + proc_pid(p), proc_best_name(p), level, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), SOCK_DOM(so), + SOCK_TYPE(so), defunct ? "is already" : "marked as", + (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) ? + " extbkidle" : ""); + } + return err; } int @@ -5959,8 +7338,9 @@ sodefunct(struct proc *p, struct socket *so, int level) panic("%s improperly called", __func__); /* NOTREACHED */ } - if (so->so_state & SS_DEFUNCT) + if (so->so_state & SS_DEFUNCT) { goto done; + } rcv = &so->so_rcv; snd = &so->so_snd; @@ -5970,28 +7350,39 @@ sodefunct(struct proc *p, struct socket *so, int level) char d[MAX_IPv6_STR_LEN]; struct inpcb *inp = sotoinpcb(so); - SODEFUNCTLOG(("%s[%d]: (target pid %d level %d) so 0x%llx [%s " - "%s:%d -> %s:%d] is now defunct [rcv_si 0x%x, snd_si 0x%x, " - "rcv_fl 0x%x, snd_fl 0x%x]\n", __func__, proc_selfpid(), - proc_pid(p), level, (uint64_t)VM_KERNEL_ADDRPERM(so), - (SOCK_TYPE(so) == SOCK_STREAM) ? "TCP" : "UDP", - inet_ntop(SOCK_DOM(so), ((SOCK_DOM(so) == PF_INET) ? - (void *)&inp->inp_laddr.s_addr : (void *)&inp->in6p_laddr), - s, sizeof (s)), ntohs(inp->in6p_lport), - inet_ntop(SOCK_DOM(so), (SOCK_DOM(so) == PF_INET) ? - (void *)&inp->inp_faddr.s_addr : (void *)&inp->in6p_faddr, - d, sizeof (d)), ntohs(inp->in6p_fport), + if (p != PROC_NULL) { + SODEFUNCTLOG( + "%s[%d, %s]: (target pid %d name %s level %d) " + "so 0x%llx [%s %s:%d -> %s:%d] is now defunct " + "[rcv_si 0x%x, snd_si 0x%x, rcv_fl 0x%x, " + " snd_fl 0x%x]\n", __func__, + proc_selfpid(), proc_best_name(current_proc()), + proc_pid(p), proc_best_name(p), level, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + (SOCK_TYPE(so) == SOCK_STREAM) ? "TCP" : "UDP", + inet_ntop(SOCK_DOM(so), ((SOCK_DOM(so) == PF_INET) ? + (void *)&inp->inp_laddr.s_addr : + (void *)&inp->in6p_laddr), + s, sizeof(s)), ntohs(inp->in6p_lport), + inet_ntop(SOCK_DOM(so), (SOCK_DOM(so) == PF_INET) ? + (void *)&inp->inp_faddr.s_addr : + (void *)&inp->in6p_faddr, + d, sizeof(d)), ntohs(inp->in6p_fport), + (uint32_t)rcv->sb_sel.si_flags, + (uint32_t)snd->sb_sel.si_flags, + rcv->sb_flags, snd->sb_flags); + } + } else if (p != PROC_NULL) { + SODEFUNCTLOG("%s[%d, %s]: (target pid %d name %s level %d) " + "so 0x%llx [%d,%d] is now defunct [rcv_si 0x%x, " + "snd_si 0x%x, rcv_fl 0x%x, snd_fl 0x%x]\n", __func__, + proc_selfpid(), proc_best_name(current_proc()), + proc_pid(p), proc_best_name(p), level, + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), (uint32_t)rcv->sb_sel.si_flags, - (uint32_t)snd->sb_sel.si_flags, - rcv->sb_flags, snd->sb_flags)); - } else { - SODEFUNCTLOG(("%s[%d]: (target pid %d level %d) so 0x%llx " - "[%d,%d] is now defunct [rcv_si 0x%x, snd_si 0x%x, " - "rcv_fl 0x%x, snd_fl 0x%x]\n", __func__, proc_selfpid(), - proc_pid(p), level, (uint64_t)VM_KERNEL_ADDRPERM(so), - SOCK_DOM(so), SOCK_TYPE(so), (uint32_t)rcv->sb_sel.si_flags, (uint32_t)snd->sb_sel.si_flags, rcv->sb_flags, - snd->sb_flags)); + snd->sb_flags); } /* @@ -6001,11 +7392,12 @@ sodefunct(struct proc *p, struct socket *so, int level) sbwakeup(snd); so->so_flags1 |= SOF1_DEFUNCTINPROG; - if (rcv->sb_flags & SB_LOCK) - sbunlock(rcv, TRUE); /* keep socket locked */ - if (snd->sb_flags & SB_LOCK) - sbunlock(snd, TRUE); /* keep socket locked */ - + if (rcv->sb_flags & SB_LOCK) { + sbunlock(rcv, TRUE); /* keep socket locked */ + } + if (snd->sb_flags & SB_LOCK) { + sbunlock(snd, TRUE); /* keep socket locked */ + } /* * Flush the buffers and disconnect. We explicitly call shutdown * on both data directions to ensure that SS_CANT{RCV,SEND}MORE @@ -6020,11 +7412,13 @@ sodefunct(struct proc *p, struct socket *so, int level) * Explicitly handle connectionless-protocol disconnection * and release any remaining data in the socket buffers. */ - if (!(so->so_flags & SS_ISDISCONNECTED)) + if (!(so->so_state & SS_ISDISCONNECTED)) { (void) soisdisconnected(so); + } - if (so->so_error == 0) + if (so->so_error == 0) { so->so_error = EBADF; + } if (rcv->sb_cc != 0) { rcv->sb_flags &= ~SB_SEL; @@ -6037,9 +7431,198 @@ sodefunct(struct proc *p, struct socket *so, int level) sbrelease(snd); } so->so_state |= SS_DEFUNCT; + OSIncrementAtomicLong((volatile long *)&sodefunct_calls); done: - return (0); + return 0; +} + +int +soresume(struct proc *p, struct socket *so, int locked) +{ + if (locked == 0) { + socket_lock(so, 1); + } + + if (so->so_flags1 & SOF1_EXTEND_BK_IDLE_INPROG) { + SODEFUNCTLOG("%s[%d, %s]: (target pid %d name %s) so 0x%llx " + "[%d,%d] resumed from bk idle\n", + __func__, proc_selfpid(), proc_best_name(current_proc()), + proc_pid(p), proc_best_name(p), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so)); + + so->so_flags1 &= ~SOF1_EXTEND_BK_IDLE_INPROG; + so->so_extended_bk_start = 0; + OSBitAndAtomic(~P_LXBKIDLEINPROG, &p->p_ladvflag); + + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_resumed); + OSDecrementAtomic(&soextbkidlestat.so_xbkidle_active); + VERIFY(soextbkidlestat.so_xbkidle_active >= 0); + } + if (locked == 0) { + socket_unlock(so, 1); + } + + return 0; +} + +/* + * Does not attempt to account for sockets that are delegated from + * the current process + */ +int +so_set_extended_bk_idle(struct socket *so, int optval) +{ + int error = 0; + + if ((SOCK_DOM(so) != PF_INET && SOCK_DOM(so) != PF_INET6) || + SOCK_PROTO(so) != IPPROTO_TCP) { + OSDecrementAtomic(&soextbkidlestat.so_xbkidle_notsupp); + error = EOPNOTSUPP; + } else if (optval == 0) { + so->so_flags1 &= ~SOF1_EXTEND_BK_IDLE_WANTED; + + soresume(current_proc(), so, 1); + } else { + struct proc *p = current_proc(); + struct fileproc *fp; + int count = 0; + + /* + * Unlock socket to avoid lock ordering issue with + * the proc fd table lock + */ + socket_unlock(so, 0); + + proc_fdlock(p); + fdt_foreach(fp, p) { + struct socket *so2; + + if (FILEGLOB_DTYPE(fp->fp_glob) != DTYPE_SOCKET) { + continue; + } + + so2 = (struct socket *)fp->fp_glob->fg_data; + if (so != so2 && + so2->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) { + count++; + } + if (count >= soextbkidlestat.so_xbkidle_maxperproc) { + break; + } + } + proc_fdunlock(p); + + socket_lock(so, 0); + + if (count >= soextbkidlestat.so_xbkidle_maxperproc) { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_toomany); + error = EBUSY; + } else if (so->so_flags & SOF_DELEGATED) { + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_nodlgtd); + error = EBUSY; + } else { + so->so_flags1 |= SOF1_EXTEND_BK_IDLE_WANTED; + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_wantok); + } + SODEFUNCTLOG("%s[%d, %s]: so 0x%llx [%d,%d] " + "%s marked for extended bk idle\n", + __func__, proc_selfpid(), proc_best_name(current_proc()), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), + (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) ? + "is" : "not"); + } + + return error; +} + +static void +so_stop_extended_bk_idle(struct socket *so) +{ + so->so_flags1 &= ~SOF1_EXTEND_BK_IDLE_INPROG; + so->so_extended_bk_start = 0; + + OSDecrementAtomic(&soextbkidlestat.so_xbkidle_active); + VERIFY(soextbkidlestat.so_xbkidle_active >= 0); + /* + * Force defunct + */ + sosetdefunct(current_proc(), so, + SHUTDOWN_SOCKET_LEVEL_DISCONNECT_INTERNAL, FALSE); + if (so->so_flags & SOF_DEFUNCT) { + sodefunct(current_proc(), so, + SHUTDOWN_SOCKET_LEVEL_DISCONNECT_INTERNAL); + } +} + +void +so_drain_extended_bk_idle(struct socket *so) +{ + if (so && (so->so_flags1 & SOF1_EXTEND_BK_IDLE_INPROG)) { + /* + * Only penalize sockets that have outstanding data + */ + if (so->so_rcv.sb_cc || so->so_snd.sb_cc) { + so_stop_extended_bk_idle(so); + + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_drained); + } + } +} + +/* + * Return values tells if socket is still in extended background idle + */ +int +so_check_extended_bk_idle_time(struct socket *so) +{ + int ret = 1; + + if ((so->so_flags1 & SOF1_EXTEND_BK_IDLE_INPROG)) { + SODEFUNCTLOG("%s[%d, %s]: so 0x%llx [%d,%d]\n", + __func__, proc_selfpid(), proc_best_name(current_proc()), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so)); + if (net_uptime() - so->so_extended_bk_start > + soextbkidlestat.so_xbkidle_time) { + so_stop_extended_bk_idle(so); + + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_expired); + + ret = 0; + } else { + struct inpcb *inp = (struct inpcb *)so->so_pcb; + + inpcb_timer_sched(inp->inp_pcbinfo, INPCB_TIMER_LAZY); + OSIncrementAtomic(&soextbkidlestat.so_xbkidle_resched); + } + } + + return ret; +} + +void +resume_proc_sockets(proc_t p) +{ + if (p->p_ladvflag & P_LXBKIDLEINPROG) { + struct fileproc *fp; + struct socket *so; + + proc_fdlock(p); + fdt_foreach(fp, p) { + if (FILEGLOB_DTYPE(fp->fp_glob) != DTYPE_SOCKET) { + continue; + } + + so = (struct socket *)fp->fp_glob->fg_data; + (void) soresume(p, so, 0); + } + proc_fdunlock(p); + + OSBitAndAtomic(~P_LXBKIDLEINPROG, &p->p_ladvflag); + } } __private_extern__ int @@ -6047,18 +7630,16 @@ so_set_recv_anyif(struct socket *so, int optval) { int ret = 0; -#if INET6 if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { -#else - if (SOCK_DOM(so) == PF_INET) { -#endif /* !INET6 */ - if (optval) + if (optval) { sotoinpcb(so)->inp_flags |= INP_RECV_ANYIF; - else + } else { sotoinpcb(so)->inp_flags &= ~INP_RECV_ANYIF; + } } - return (ret); + + return ret; } __private_extern__ int @@ -6066,15 +7647,11 @@ so_get_recv_anyif(struct socket *so) { int ret = 0; -#if INET6 if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { -#else - if (SOCK_DOM(so) == PF_INET) { -#endif /* !INET6 */ ret = (sotoinpcb(so)->inp_flags & INP_RECV_ANYIF) ? 1 : 0; } - return (ret); + return ret; } int @@ -6082,6 +7659,7 @@ so_set_restrictions(struct socket *so, uint32_t vals) { int nocell_old, nocell_new; int noexpensive_old, noexpensive_new; + int noconstrained_old, noconstrained_new; /* * Deny-type restrictions are trapdoors; once set they cannot be @@ -6098,162 +7676,53 @@ so_set_restrictions(struct socket *so, uint32_t vals) */ nocell_old = (so->so_restrictions & SO_RESTRICT_DENY_CELLULAR); noexpensive_old = (so->so_restrictions & SO_RESTRICT_DENY_EXPENSIVE); + noconstrained_old = (so->so_restrictions & SO_RESTRICT_DENY_CONSTRAINED); so->so_restrictions |= (vals & (SO_RESTRICT_DENY_IN | - SO_RESTRICT_DENY_OUT | SO_RESTRICT_DENY_CELLULAR | - SO_RESTRICT_DENY_EXPENSIVE)); + SO_RESTRICT_DENY_OUT | SO_RESTRICT_DENY_CELLULAR | + SO_RESTRICT_DENY_EXPENSIVE | SO_RESTRICT_DENY_CONSTRAINED)); nocell_new = (so->so_restrictions & SO_RESTRICT_DENY_CELLULAR); noexpensive_new = (so->so_restrictions & SO_RESTRICT_DENY_EXPENSIVE); + noconstrained_new = (so->so_restrictions & SO_RESTRICT_DENY_CONSTRAINED); /* we can only set, not clear restrictions */ if ((nocell_new - nocell_old) == 0 && - (noexpensive_new - noexpensive_old) == 0) - return (0); -#if INET6 + (noexpensive_new - noexpensive_old) == 0 && + (noconstrained_new - noconstrained_old) == 0) { + return 0; + } if (SOCK_DOM(so) == PF_INET || SOCK_DOM(so) == PF_INET6) { -#else - if (SOCK_DOM(so) == PF_INET) { -#endif /* !INET6 */ if (nocell_new - nocell_old != 0) { - /* if deny cellular is now set, do what's needed for INPCB */ + /* + * if deny cellular is now set, do what's needed + * for INPCB + */ inp_set_nocellular(sotoinpcb(so)); } if (noexpensive_new - noexpensive_old != 0) { inp_set_noexpensive(sotoinpcb(so)); } - } - - return (0); -} - -uint32_t -so_get_restrictions(struct socket *so) -{ - return (so->so_restrictions & (SO_RESTRICT_DENY_IN | - SO_RESTRICT_DENY_OUT | - SO_RESTRICT_DENY_CELLULAR | SO_RESTRICT_DENY_EXPENSIVE)); -} - -struct sockaddr_entry * -sockaddrentry_alloc(int how) -{ - struct sockaddr_entry *se; - - se = (how == M_WAITOK) ? zalloc(se_zone) : zalloc_noblock(se_zone); - if (se != NULL) - bzero(se, se_zone_size); - - return (se); -} - -void -sockaddrentry_free(struct sockaddr_entry *se) -{ - if (se->se_addr != NULL) { - FREE(se->se_addr, M_SONAME); - se->se_addr = NULL; - } - zfree(se_zone, se); -} - -struct sockaddr_entry * -sockaddrentry_dup(const struct sockaddr_entry *src_se, int how) -{ - struct sockaddr_entry *dst_se; - - dst_se = sockaddrentry_alloc(how); - if (dst_se != NULL) { - int len = src_se->se_addr->sa_len; - - MALLOC(dst_se->se_addr, struct sockaddr *, - len, M_SONAME, how | M_ZERO); - if (dst_se->se_addr != NULL) { - bcopy(src_se->se_addr, dst_se->se_addr, len); - } else { - sockaddrentry_free(dst_se); - dst_se = NULL; + if (noconstrained_new - noconstrained_old != 0) { + inp_set_noconstrained(sotoinpcb(so)); } } - return (dst_se); -} - -struct sockaddr_list * -sockaddrlist_alloc(int how) -{ - struct sockaddr_list *sl; - - sl = (how == M_WAITOK) ? zalloc(sl_zone) : zalloc_noblock(sl_zone); - if (sl != NULL) { - bzero(sl, sl_zone_size); - TAILQ_INIT(&sl->sl_head); - } - return (sl); -} - -void -sockaddrlist_free(struct sockaddr_list *sl) -{ - struct sockaddr_entry *se, *tse; - - TAILQ_FOREACH_SAFE(se, &sl->sl_head, se_link, tse) { - sockaddrlist_remove(sl, se); - sockaddrentry_free(se); + if (SOCK_DOM(so) == PF_MULTIPATH) { + mptcp_set_restrictions(so); } - VERIFY(sl->sl_cnt == 0 && TAILQ_EMPTY(&sl->sl_head)); - zfree(sl_zone, sl); -} - -void -sockaddrlist_insert(struct sockaddr_list *sl, struct sockaddr_entry *se) -{ - VERIFY(!(se->se_flags & SEF_ATTACHED)); - se->se_flags |= SEF_ATTACHED; - TAILQ_INSERT_TAIL(&sl->sl_head, se, se_link); - sl->sl_cnt++; - VERIFY(sl->sl_cnt != 0); -} -void -sockaddrlist_remove(struct sockaddr_list *sl, struct sockaddr_entry *se) -{ - VERIFY(se->se_flags & SEF_ATTACHED); - se->se_flags &= ~SEF_ATTACHED; - VERIFY(sl->sl_cnt != 0); - sl->sl_cnt--; - TAILQ_REMOVE(&sl->sl_head, se, se_link); + return 0; } -struct sockaddr_list * -sockaddrlist_dup(const struct sockaddr_list *src_sl, int how) +uint32_t +so_get_restrictions(struct socket *so) { - struct sockaddr_entry *src_se, *tse; - struct sockaddr_list *dst_sl; - - dst_sl = sockaddrlist_alloc(how); - if (dst_sl == NULL) - return (NULL); - - TAILQ_FOREACH_SAFE(src_se, &src_sl->sl_head, se_link, tse) { - struct sockaddr_entry *dst_se; - - if (src_se->se_addr == NULL) - continue; - - dst_se = sockaddrentry_dup(src_se, how); - if (dst_se == NULL) { - sockaddrlist_free(dst_sl); - return (NULL); - } - - sockaddrlist_insert(dst_sl, dst_se); - } - VERIFY(src_sl->sl_cnt == dst_sl->sl_cnt); - - return (dst_sl); + return so->so_restrictions & (SO_RESTRICT_DENY_IN | + SO_RESTRICT_DENY_OUT | + SO_RESTRICT_DENY_CELLULAR | SO_RESTRICT_DENY_EXPENSIVE); } int -so_set_effective_pid(struct socket *so, int epid, struct proc *p) +so_set_effective_pid(struct socket *so, int epid, struct proc *p, boolean_t check_cred) { struct proc *ep = PROC_NULL; int error = 0; @@ -6280,7 +7749,7 @@ so_set_effective_pid(struct socket *so, int epid, struct proc *p) * the process's own pid, then proceed. Otherwise ensure * that the issuing process has the necessary privileges. */ - if (epid != so->last_pid || epid != proc_pid(p)) { + if (check_cred && (epid != so->last_pid || epid != proc_pid(p))) { if ((error = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_SOCKET_DELEGATE, 0))) { error = EACCES; @@ -6313,7 +7782,24 @@ so_set_effective_pid(struct socket *so, int epid, struct proc *p) so->so_flags |= SOF_DELEGATED; so->e_upid = proc_uniqueid(ep); so->e_pid = proc_pid(ep); - proc_getexecutableuuid(ep, so->e_uuid, sizeof (so->e_uuid)); + proc_getexecutableuuid(ep, so->e_uuid, sizeof(so->e_uuid)); + +#if defined(XNU_TARGET_OS_OSX) + if (ep->p_responsible_pid != so->e_pid) { + proc_t rp = proc_find(ep->p_responsible_pid); + if (rp != PROC_NULL) { + proc_getexecutableuuid(rp, so->so_ruuid, sizeof(so->so_ruuid)); + so->so_rpid = ep->p_responsible_pid; + proc_rele(rp); + } else { + uuid_clear(so->so_ruuid); + so->so_rpid = -1; + } + } +#endif + } + if (so->so_proto != NULL && so->so_proto->pr_update_last_owner != NULL) { + (*so->so_proto->pr_update_last_owner)(so, NULL, ep); } done: if (error == 0 && net_io_policy_log) { @@ -6322,14 +7808,16 @@ done: uuid_unparse(so->e_uuid, buf); log(LOG_DEBUG, "%s[%s,%d]: so 0x%llx [%d,%d] epid %d (%s) " "euuid %s%s\n", __func__, proc_name_address(p), - proc_pid(p), (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so), - SOCK_TYPE(so), so->e_pid, proc_name_address(ep), buf, + proc_pid(p), (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), + so->e_pid, proc_name_address(ep), buf, ((so->so_flags & SOF_DELEGATED) ? " [delegated]" : "")); } else if (error != 0 && net_io_policy_log) { log(LOG_ERR, "%s[%s,%d]: so 0x%llx [%d,%d] epid %d (%s) " "ERROR (%d)\n", __func__, proc_name_address(p), - proc_pid(p), (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so), - SOCK_TYPE(so), epid, (ep == PROC_NULL) ? "PROC_NULL" : + proc_pid(p), (uint64_t)DEBUG_KERNEL_ADDRPERM(so), + SOCK_DOM(so), SOCK_TYPE(so), + epid, (ep == PROC_NULL) ? "PROC_NULL" : proc_name_address(ep), error); } @@ -6342,14 +7830,15 @@ done: #endif /* NECP */ } - if (ep != PROC_NULL) + if (ep != PROC_NULL) { proc_rele(ep); + } - return (error); + return error; } int -so_set_effective_uuid(struct socket *so, uuid_t euuid, struct proc *p) +so_set_effective_uuid(struct socket *so, uuid_t euuid, struct proc *p, boolean_t check_cred) { uuid_string_t buf; uuid_t uuid; @@ -6358,7 +7847,7 @@ so_set_effective_uuid(struct socket *so, uuid_t euuid, struct proc *p) /* UUID must not be all-zeroes (reserved for kernel) */ if (uuid_is_null(euuid)) { error = EINVAL; - goto done;; + goto done; } /* @@ -6372,7 +7861,7 @@ so_set_effective_uuid(struct socket *so, uuid_t euuid, struct proc *p) } /* Get the UUID of the issuing process */ - proc_getexecutableuuid(p, uuid, sizeof (uuid)); + proc_getexecutableuuid(p, uuid, sizeof(uuid)); /* * If this is issued by a process that's recorded as the @@ -6380,8 +7869,9 @@ so_set_effective_uuid(struct socket *so, uuid_t euuid, struct proc *p) * the process's own uuid, then proceed. Otherwise ensure * that the issuing process has the necessary privileges. */ - if (uuid_compare(euuid, so->last_uuid) != 0 || - uuid_compare(euuid, uuid) != 0) { + if (check_cred && + (uuid_compare(euuid, so->last_uuid) != 0 || + uuid_compare(euuid, uuid) != 0)) { if ((error = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_SOCKET_DELEGATE, 0))) { error = EACCES; @@ -6416,20 +7906,26 @@ so_set_effective_uuid(struct socket *so, uuid_t euuid, struct proc *p) so->e_pid = so->last_pid; uuid_copy(so->e_uuid, euuid); } - + /* + * The following will clear the effective process name as it's the same + * as the real process + */ + if (so->so_proto != NULL && so->so_proto->pr_update_last_owner != NULL) { + (*so->so_proto->pr_update_last_owner)(so, NULL, NULL); + } done: if (error == 0 && net_io_policy_log) { uuid_unparse(so->e_uuid, buf); log(LOG_DEBUG, "%s[%s,%d]: so 0x%llx [%d,%d] epid %d " "euuid %s%s\n", __func__, proc_name_address(p), proc_pid(p), - (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), SOCK_DOM(so), SOCK_TYPE(so), so->e_pid, buf, ((so->so_flags & SOF_DELEGATED) ? " [delegated]" : "")); } else if (error != 0 && net_io_policy_log) { uuid_unparse(euuid, buf); log(LOG_DEBUG, "%s[%s,%d]: so 0x%llx [%d,%d] euuid %s " "ERROR (%d)\n", __func__, proc_name_address(p), proc_pid(p), - (uint64_t)VM_KERNEL_ADDRPERM(so), SOCK_DOM(so), + (uint64_t)DEBUG_KERNEL_ADDRPERM(so), SOCK_DOM(so), SOCK_TYPE(so), buf, error); } @@ -6442,7 +7938,7 @@ done: #endif /* NECP */ } - return (error); + return error; } void @@ -6456,22 +7952,22 @@ netpolicy_post_msg(uint32_t ev_code, struct netpolicy_event_data *ev_data, * structure, but the caller can provide for a longer event * structure to post, depending on the event code. */ - VERIFY(ev_data != NULL && ev_datalen >= sizeof (*ev_data)); + VERIFY(ev_data != NULL && ev_datalen >= sizeof(*ev_data)); - bzero(&ev_msg, sizeof (ev_msg)); - ev_msg.vendor_code = KEV_VENDOR_APPLE; - ev_msg.kev_class = KEV_NETWORK_CLASS; - ev_msg.kev_subclass = KEV_NETPOLICY_SUBCLASS; - ev_msg.event_code = ev_code; + bzero(&ev_msg, sizeof(ev_msg)); + ev_msg.vendor_code = KEV_VENDOR_APPLE; + ev_msg.kev_class = KEV_NETWORK_CLASS; + ev_msg.kev_subclass = KEV_NETPOLICY_SUBCLASS; + ev_msg.event_code = ev_code; - ev_msg.dv[0].data_ptr = ev_data; + ev_msg.dv[0].data_ptr = ev_data; ev_msg.dv[0].data_length = ev_datalen; kev_post_msg(&ev_msg); } void -socket_post_kev_msg(uint32_t ev_code, +socket_post_kev_msg(uint32_t ev_code, struct kev_socket_event_data *ev_data, uint32_t ev_datalen) { @@ -6484,7 +7980,7 @@ socket_post_kev_msg(uint32_t ev_code, ev_msg.event_code = ev_code; ev_msg.dv[0].data_ptr = ev_data; - ev_msg.dv[0]. data_length = ev_datalen; + ev_msg.dv[0].data_length = ev_datalen; kev_post_msg(&ev_msg); } @@ -6492,10 +7988,13 @@ socket_post_kev_msg(uint32_t ev_code, void socket_post_kev_msg_closed(struct socket *so) { - struct kev_socket_closed ev; + struct kev_socket_closed ev = {}; struct sockaddr *socksa = NULL, *peersa = NULL; int err; - bzero(&ev, sizeof(ev)); + + if ((so->so_flags1 & SOF1_WANT_KEV_SOCK_CLOSED) == 0) { + return; + } err = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &socksa); if (err == 0) { err = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, @@ -6503,16 +8002,18 @@ socket_post_kev_msg_closed(struct socket *so) if (err == 0) { memcpy(&ev.ev_data.kev_sockname, socksa, min(socksa->sa_len, - sizeof (ev.ev_data.kev_sockname))); + sizeof(ev.ev_data.kev_sockname))); memcpy(&ev.ev_data.kev_peername, peersa, min(peersa->sa_len, - sizeof (ev.ev_data.kev_peername))); + sizeof(ev.ev_data.kev_peername))); socket_post_kev_msg(KEV_SOCKET_CLOSED, - &ev.ev_data, sizeof (ev)); + &ev.ev_data, sizeof(ev)); } } - if (socksa != NULL) + if (socksa != NULL) { FREE(socksa, M_SONAME); - if (peersa != NULL) + } + if (peersa != NULL) { FREE(peersa, M_SONAME); + } }