X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8f6c56a50524aa785f7e596d52dddfb331e18961..4a3eedf9ecc9bbe3f3a5c6ce5e53ad199d639d32:/bsd/kern/uipc_socket.c diff --git a/bsd/kern/uipc_socket.c b/bsd/kern/uipc_socket.c index 484b1c40d..7b259ec9f 100644 --- a/bsd/kern/uipc_socket.c +++ b/bsd/kern/uipc_socket.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2007 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -25,7 +25,6 @@ * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ -/* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */ /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ /* * Copyright (c) 1982, 1986, 1988, 1990, 1993 @@ -62,10 +61,17 @@ * @(#)uipc_socket.c 8.3 (Berkeley) 4/15/94 * $FreeBSD: src/sys/kern/uipc_socket.c,v 1.68.2.16 2001/06/14 20:46:06 ume Exp $ */ +/* + * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce + * support for mandatory and extensible security protections. This notice + * is included in support of clause 2.2 (b) of the Apple Public License, + * Version 2.0. + */ #include #include #include +#include #include #include #include @@ -85,12 +91,26 @@ #include #include #include +#include #include #include #include #include #include #include +#include +#include + +#if CONFIG_MACF +#include +#include +#endif /* MAC */ + +/* how a timeval looks to a 64-bit process */ +struct timeval64 { + int64_t tv_sec; + int32_t tv_usec; +}; int so_cache_hw = 0; int so_cache_timeouts = 0; @@ -101,8 +121,6 @@ struct socket *socket_cache_tail = 0; u_long so_cache_time = 0; int so_cache_init_done = 0; struct zone *so_cache_zone; -extern int get_inpcb_str_size(); -extern int get_tcp_str_size(); static lck_grp_t *so_cache_mtx_grp; static lck_attr_t *so_cache_mtx_attr; @@ -111,20 +129,26 @@ 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 int filt_solisten(struct knote *kn, long hint); +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 int filt_solisten(struct knote *kn, long hint); + +static int +sooptcopyin_timeval(struct sockopt *sopt, struct timeval * tv_p); + +static int +sooptcopyout_timeval(struct sockopt *sopt, const struct timeval * tv_p); static struct filterops solisten_filtops = - { 1, NULL, filt_sordetach, filt_solisten }; + { 1, NULL, filt_sordetach, filt_solisten }; static struct filterops soread_filtops = - { 1, NULL, filt_sordetach, filt_soread }; + { 1, NULL, filt_sordetach, filt_soread }; static struct filterops sowrite_filtops = - { 1, NULL, filt_sowdetach, filt_sowrite }; + { 1, NULL, filt_sowdetach, filt_sowrite }; -#define EVEN_MORE_LOCKING_DEBUG 0 +#define EVEN_MORE_LOCKING_DEBUG 0 int socket_debug = 0; int socket_zone = M_SOCKET; so_gen_t so_gencnt; /* generation count for sockets */ @@ -132,33 +156,52 @@ 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_SORECEIVE NETDBG_CODE(DBG_NETSOCK, (8 << 8)) -#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_SORECEIVE NETDBG_CODE(DBG_NETSOCK, (8 << 8)) +#define DBG_FNC_SOSHUTDOWN NETDBG_CODE(DBG_NETSOCK, (9 << 8)) -#define MAX_SOOPTGETM_SIZE (128 * MCLBYTES) +#define MAX_SOOPTGETM_SIZE (128 * MCLBYTES) SYSCTL_DECL(_kern_ipc); -static int somaxconn = SOMAXCONN; -SYSCTL_INT(_kern_ipc, KIPC_SOMAXCONN, somaxconn, CTLFLAG_RW, &somaxconn, - 0, ""); +int somaxconn = SOMAXCONN; +SYSCTL_INT(_kern_ipc, KIPC_SOMAXCONN, somaxconn, CTLFLAG_RW, &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, &sosendminchain, - 0, ""); + 0, ""); SYSCTL_INT(_kern_ipc, OID_AUTO, sorecvmincopy, CTLFLAG_RW, &sorecvmincopy, - 0, ""); + 0, ""); -void so_cache_timer(); +/* + * Set to enable jumbo clusters (if available) for large writes when + * the socket is marked with SOF_MULTIPAGES; see below. + */ +int sosendjcl = 1; +SYSCTL_INT(_kern_ipc, OID_AUTO, sosendjcl, CTLFLAG_RW, &sosendjcl, 0, ""); + +/* + * Set this to ignore SOF_MULTIPAGES and use jumbo clusters for large + * writes on the socket for all protocols on any network interfaces, + * depending upon sosendjcl above. Be extra careful when setting this + * to 1, because sending down packets that cross physical pages down to + * broken drivers (those that falsely assume that the physical pages + * are contiguous) might lead to system panics or silent data corruption. + * When set to 0, the system will respect SOF_MULTIPAGES, which is set + * only for TCP sockets whose outgoing interface is IFNET_MULTIPAGES + * capable. Set this to 1 only for testing/debugging purposes. + */ +int sosendjcl_ignore_capab = 0; +SYSCTL_INT(_kern_ipc, OID_AUTO, sosendjcl_ignore_capab, CTLFLAG_RW, + &sosendjcl_ignore_capab, 0, ""); /* * Socket operation routines. @@ -168,143 +211,155 @@ void so_cache_timer(); * switching out to the protocol specific routines. */ +/* sys_generic.c */ +extern void postevent(struct socket *, struct sockbuf *, int); +extern void evsofree(struct socket *); + +/* TODO: these should be in header file */ +extern int get_inpcb_str_size(void); +extern int get_tcp_str_size(void); +extern struct domain *pffinddomain(int); +extern struct protosw *pffindprotonotype(int, int); +extern int soclose_locked(struct socket *); +extern int soo_kqfilter(struct fileproc *, struct knote *, struct proc *); + #ifdef __APPLE__ vm_size_t so_cache_zone_element_size; -static int sodelayed_copy(struct socket *so, struct uio *uio, struct mbuf **free_list, int *resid); +static int sodelayed_copy(struct socket *, struct uio *, struct mbuf **, int *); +static void cached_sock_alloc(struct socket **, int); +static void cached_sock_free(struct socket *); +static void so_cache_timer(void *); + +void soclose_wait_locked(struct socket *so); -void socketinit() +void +socketinit(void) { - vm_size_t str_size; + vm_size_t str_size; if (so_cache_init_done) { printf("socketinit: already called...\n"); return; } + PE_parse_boot_arg("socket_debug", &socket_debug); + /* * allocate lock group attribute and group for socket cache mutex */ so_cache_mtx_grp_attr = lck_grp_attr_alloc_init(); - lck_grp_attr_setdefault(so_cache_mtx_grp_attr); - so_cache_mtx_grp = lck_grp_alloc_init("so_cache", so_cache_mtx_grp_attr); - + so_cache_mtx_grp = lck_grp_alloc_init("so_cache", + so_cache_mtx_grp_attr); + /* * allocate the lock attribute for socket cache mutex */ so_cache_mtx_attr = lck_attr_alloc_init(); - lck_attr_setdefault(so_cache_mtx_attr); - so_cache_init_done = 1; + so_cache_init_done = 1; + + /* cached sockets mutex */ + so_cache_mtx = lck_mtx_alloc_init(so_cache_mtx_grp, so_cache_mtx_attr); - so_cache_mtx = lck_mtx_alloc_init(so_cache_mtx_grp, so_cache_mtx_attr); /* cached sockets mutex */ - - if (so_cache_mtx == NULL) + if (so_cache_mtx == NULL) return; /* we're hosed... */ - str_size = (vm_size_t)( sizeof(struct socket) + 4 + - get_inpcb_str_size() + 4 + - get_tcp_str_size()); - so_cache_zone = zinit (str_size, 120000*str_size, 8192, "socache zone"); + str_size = (vm_size_t)(sizeof (struct socket) + 4 + + get_inpcb_str_size() + 4 + get_tcp_str_size()); + + so_cache_zone = zinit(str_size, 120000*str_size, 8192, "socache zone"); #if TEMPDEBUG - printf("cached_sock_alloc -- so_cache_zone size is %x\n", str_size); + printf("cached_sock_alloc -- so_cache_zone size is %x\n", str_size); #endif - timeout(so_cache_timer, NULL, (SO_CACHE_FLUSH_INTERVAL * hz)); - - so_cache_zone_element_size = str_size; + timeout(so_cache_timer, NULL, (SO_CACHE_FLUSH_INTERVAL * hz)); - sflt_init(); + so_cache_zone_element_size = str_size; + sflt_init(); } -void cached_sock_alloc(so, waitok) -struct socket **so; -int waitok; - +static void +cached_sock_alloc(struct socket **so, int waitok) { - caddr_t temp; - register u_long offset; - + caddr_t temp; + register u_long offset; lck_mtx_lock(so_cache_mtx); - if (cached_sock_count) { - cached_sock_count--; - *so = socket_cache_head; - if (*so == 0) - panic("cached_sock_alloc: cached sock is null"); + if (cached_sock_count) { + cached_sock_count--; + *so = socket_cache_head; + if (*so == 0) + panic("cached_sock_alloc: cached sock is null"); - socket_cache_head = socket_cache_head->cache_next; - if (socket_cache_head) - socket_cache_head->cache_prev = 0; - else - socket_cache_tail = 0; + socket_cache_head = socket_cache_head->cache_next; + if (socket_cache_head) + socket_cache_head->cache_prev = 0; + else + socket_cache_tail = 0; lck_mtx_unlock(so_cache_mtx); - temp = (*so)->so_saved_pcb; - bzero((caddr_t)*so, sizeof(struct socket)); + temp = (*so)->so_saved_pcb; + bzero((caddr_t)*so, sizeof (struct socket)); #if TEMPDEBUG - kprintf("cached_sock_alloc - retreiving cached sock %x - count == %d\n", *so, - cached_sock_count); + kprintf("cached_sock_alloc - retreiving cached sock %p - " + "count == %d\n", *so, cached_sock_count); #endif - (*so)->so_saved_pcb = temp; - (*so)->cached_in_sock_layer = 1; - - } - else { + (*so)->so_saved_pcb = temp; + (*so)->cached_in_sock_layer = 1; + } else { #if TEMPDEBUG - kprintf("Allocating cached sock %x from memory\n", *so); + kprintf("Allocating cached sock %p from memory\n", *so); #endif - 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 == 0) - return; + lck_mtx_unlock(so_cache_mtx); - bzero((caddr_t)*so, sizeof(struct socket)); + if (waitok) + *so = (struct socket *)zalloc(so_cache_zone); + else + *so = (struct socket *)zalloc_noblock(so_cache_zone); - /* - * Define offsets for extra structures into our single block of - * memory. Align extra structures on longword boundaries. - */ + if (*so == 0) + return; + bzero((caddr_t)*so, sizeof (struct socket)); - offset = (u_long) *so; - offset += sizeof(struct socket); - if (offset & 0x3) { - offset += 4; - offset &= 0xfffffffc; - } - (*so)->so_saved_pcb = (caddr_t) offset; - offset += get_inpcb_str_size(); - if (offset & 0x3) { - offset += 4; - offset &= 0xfffffffc; - } + /* + * Define offsets for extra structures into our single block of + * memory. Align extra structures on longword boundaries. + */ + offset = (u_long) *so; + offset += sizeof (struct socket); + if (offset & 0x3) { + offset += 4; + offset &= 0xfffffffc; + } + (*so)->so_saved_pcb = (caddr_t)offset; + offset += get_inpcb_str_size(); + if (offset & 0x3) { + offset += 4; + offset &= 0xfffffffc; + } - ((struct inpcb *) (*so)->so_saved_pcb)->inp_saved_ppcb = (caddr_t) offset; + ((struct inpcb *)(*so)->so_saved_pcb)->inp_saved_ppcb = + (caddr_t)offset; #if TEMPDEBUG - kprintf("Allocating cached socket - %x, pcb=%x tcpcb=%x\n", *so, - (*so)->so_saved_pcb, + kprintf("Allocating cached socket - %p, pcb=%p tcpcb=%p\n", + *so, (*so)->so_saved_pcb, ((struct inpcb *)(*so)->so_saved_pcb)->inp_saved_ppcb); #endif - } + } - (*so)->cached_in_sock_layer = 1; + (*so)->cached_in_sock_layer = 1; } - -void cached_sock_free(so) -struct socket *so; +static void +cached_sock_free(struct socket *so) { lck_mtx_lock(so_cache_mtx); @@ -313,13 +368,12 @@ struct socket *so; --cached_sock_count; lck_mtx_unlock(so_cache_mtx); #if TEMPDEBUG - kprintf("Freeing overflowed cached socket %x\n", so); + kprintf("Freeing overflowed cached socket %p\n", so); #endif zfree(so_cache_zone, so); - } - else { + } else { #if TEMPDEBUG - kprintf("Freeing socket %x into cache\n", so); + kprintf("Freeing socket %p into cache\n", so); #endif if (so_cache_hw < cached_sock_count) so_cache_hw = cached_sock_count; @@ -337,49 +391,42 @@ struct socket *so; } #if TEMPDEBUG - kprintf("Freed cached sock %x into cache - count is %d\n", so, cached_sock_count); + kprintf("Freed cached sock %p into cache - count is %d\n", + so, cached_sock_count); #endif - - } - -void so_cache_timer() +static void +so_cache_timer(__unused void *dummy) { register struct socket *p; register int n_freed = 0; - lck_mtx_lock(so_cache_mtx); ++so_cache_time; - while ( (p = socket_cache_tail) ) - { + while ((p = socket_cache_tail)) { if ((so_cache_time - p->cache_timestamp) < SO_CACHE_TIME_LIMIT) - break; + break; so_cache_timeouts++; - - if ( (socket_cache_tail = p->cache_prev) ) - p->cache_prev->cache_next = 0; - if (--cached_sock_count == 0) - socket_cache_head = 0; + if ((socket_cache_tail = p->cache_prev)) + p->cache_prev->cache_next = 0; + if (--cached_sock_count == 0) + socket_cache_head = 0; zfree(so_cache_zone, p); - - if (++n_freed >= SO_CACHE_MAX_FREE_BATCH) - { - so_cache_max_freed++; + + if (++n_freed >= SO_CACHE_MAX_FREE_BATCH) { + so_cache_max_freed++; break; } } lck_mtx_unlock(so_cache_mtx); timeout(so_cache_timer, NULL, (SO_CACHE_FLUSH_INTERVAL * hz)); - - } #endif /* __APPLE__ */ @@ -391,37 +438,49 @@ void so_cache_timer() * the protocols can be easily modified to do this. */ struct socket * -soalloc(waitok, dom, type) - int waitok; - int dom; - int type; +soalloc(int waitok, int dom, int type) { struct socket *so; - if ((dom == PF_INET) && (type == SOCK_STREAM)) - cached_sock_alloc(&so, waitok); - else - { - MALLOC_ZONE(so, struct socket *, sizeof(*so), socket_zone, M_WAITOK); - if (so) - bzero(so, sizeof *so); + if ((dom == PF_INET) && (type == SOCK_STREAM)) { + cached_sock_alloc(&so, waitok); + } else { + MALLOC_ZONE(so, struct socket *, sizeof (*so), socket_zone, + M_WAITOK); + if (so != NULL) + bzero(so, sizeof (*so)); } /* XXX race condition for reentrant kernel */ //###LD Atomic add for so_gencnt - if (so) { - so->so_gencnt = ++so_gencnt; - so->so_zone = socket_zone; + if (so != NULL) { + so->so_gencnt = ++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 */ } - return so; + return (so); } +/* + * Returns: 0 Success + * EAFNOSUPPORT + * EPROTOTYPE + * EPROTONOSUPPORT + * ENOBUFS + * :ENOBUFS[AF_UNIX] + * :ENOBUFS[TCP] + * :ENOMEM[TCP] + * :EISCONN[TCP] + * :??? [other protocol families, IPSEC] + */ int -socreate(dom, aso, type, proto) - int dom; - struct socket **aso; - register int type; - int proto; +socreate(int dom, struct socket **aso, int type, int proto) { struct proc *p = current_proc(); register struct protosw *prp; @@ -435,18 +494,17 @@ socreate(dom, aso, type, proto) else prp = pffindtype(dom, type); - if (prp == 0 || prp->pr_usrreqs->pru_attach == 0) - return (EPROTONOSUPPORT); -#ifndef __APPLE__ - - if (p->p_prison && jail_socket_unixiproute_only && - prp->pr_domain->dom_family != PF_LOCAL && - prp->pr_domain->dom_family != PF_INET && - prp->pr_domain->dom_family != PF_ROUTE) { + if (prp == 0 || prp->pr_usrreqs->pru_attach == 0) { + if (pffinddomain(dom) == NULL) { + return (EAFNOSUPPORT); + } + if (proto != 0) { + if (pffindprotonotype(dom, proto) != NULL) { + return (EPROTOTYPE); + } + } return (EPROTONOSUPPORT); } - -#endif if (prp->pr_type != type) return (EPROTOTYPE); so = soalloc(p != 0, dom, type); @@ -457,30 +515,36 @@ socreate(dom, aso, type, proto) TAILQ_INIT(&so->so_comp); so->so_type = type; -#ifdef __APPLE__ if (p != 0) { so->so_uid = kauth_cred_getuid(kauth_cred_get()); - if (!suser(kauth_cred_get(),NULL)) + if (!suser(kauth_cred_get(), NULL)) so->so_state = SS_PRIV; } -#else - so->so_cred = kauth_cred_get_with_ref(); -#endif so->so_proto = prp; #ifdef __APPLE__ so->so_rcv.sb_flags |= SB_RECV; /* XXX */ so->so_rcv.sb_so = so->so_snd.sb_so = so; #endif - + 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 */ + //### Attachement will create the per pcb lock if necessary and increase refcount - so->so_usecount++; /* for creation, make sure it's done before socket is inserted in lists */ + /* + * for creation, make sure it's done before + * socket is inserted in lists + */ + so->so_usecount++; error = (*prp->pr_usrreqs->pru_attach)(so, proto, p); if (error) { - /* - * Warning: - * If so_pcb is not zero, the socket will be leaked, - * so protocol attachment handler must be coded carefuly + /* + * Warning: + * If so_pcb is not zero, the socket will be leaked, + * so protocol attachment handler must be coded carefuly */ so->so_state |= SS_NOFDREF; so->so_usecount--; @@ -498,36 +562,64 @@ socreate(dom, aso, type, proto) so->so_options |= SO_DEBUG; #endif #endif - *aso = so; return (0); } +/* + * Returns: 0 Success + * :EINVAL Invalid argument [COMMON_START] + * :EAFNOSUPPORT Address family not supported + * :EADDRNOTAVAIL Address not available. + * :EINVAL Invalid argument + * :EAFNOSUPPORT Address family not supported [notdef] + * :EACCES Permission denied + * :EADDRINUSE Address in use + * :EAGAIN Resource unavailable, try again + * :EPERM Operation not permitted + * :??? + * :??? + * + * Notes: It's not possible to fully enumerate the return codes above, + * since socket filter authors and protocol family authors may + * not choose to limit their error returns to those listed, even + * though this may result in some software operating incorrectly. + * + * The error codes which are enumerated above are those known to + * be returned by the tcp_usr_bind function supplied. + */ int -sobind(so, nam) - struct socket *so; - struct sockaddr *nam; - +sobind(struct socket *so, struct sockaddr *nam) { struct proc *p = current_proc(); int error = 0; - struct socket_filter_entry *filter; - int filtered = 0; + struct socket_filter_entry *filter; + int filtered = 0; socket_lock(so, 1); + /* + * If this is a bind request on a previously-accepted socket + * that has been marked as inactive, reject it now before + * we go any further. + */ + if (so->so_flags & SOF_DEFUNCT) { + error = EINVAL; + goto out; + } + /* Socket filter */ error = 0; for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { + filter = filter->sfe_next_onsocket) { if (filter->sfe_filter->sf_filter.sf_bind) { if (filtered == 0) { filtered = 1; sflt_use(so); socket_unlock(so, 0); } - error = filter->sfe_filter->sf_filter.sf_bind( - filter->sfe_cookie, so, nam); + error = filter->sfe_filter->sf_filter. + sf_bind(filter->sfe_cookie, so, nam); } } if (filtered != 0) { @@ -535,124 +627,155 @@ sobind(so, nam) sflt_unuse(so); } /* End socket filter */ - + if (error == 0) error = (*so->so_proto->pr_usrreqs->pru_bind)(so, nam, p); - +out: socket_unlock(so, 1); - + if (error == EJUSTRETURN) error = 0; - + return (error); } void -sodealloc(so) - struct socket *so; +sodealloc(struct socket *so) { so->so_gencnt = ++so_gencnt; -#ifndef __APPLE__ - if (so->so_rcv.sb_hiwat) - (void)chgsbsize(so->so_cred->cr_uidinfo, - &so->so_rcv.sb_hiwat, 0, RLIM_INFINITY); - if (so->so_snd.sb_hiwat) - (void)chgsbsize(so->so_cred->cr_uidinfo, - &so->so_snd.sb_hiwat, 0, RLIM_INFINITY); -#ifdef INET - if (so->so_accf != NULL) { - if (so->so_accf->so_accept_filter != NULL && - so->so_accf->so_accept_filter->accf_destroy != NULL) { - so->so_accf->so_accept_filter->accf_destroy(so); - } - if (so->so_accf->so_accept_filter_str != NULL) - FREE(so->so_accf->so_accept_filter_str, M_ACCF); - FREE(so->so_accf, M_ACCF); - } -#endif /* INET */ - kauth_cred_rele(so->so_cred); - zfreei(so->so_zone, so); -#else - if (so->cached_in_sock_layer == 1) - cached_sock_free(so); - else { - if (so->cached_in_sock_layer == -1) - panic("sodealloc: double dealloc: so=%x\n", so); - so->cached_in_sock_layer = -1; - FREE_ZONE(so, sizeof(*so), so->so_zone); +#if CONFIG_MACF_SOCKET + mac_socket_label_destroy(so); +#endif /* MAC_SOCKET */ + if (so->cached_in_sock_layer == 1) { + cached_sock_free(so); + } else { + if (so->cached_in_sock_layer == -1) + panic("sodealloc: double dealloc: so=%p\n", so); + so->cached_in_sock_layer = -1; + FREE_ZONE(so, sizeof (*so), so->so_zone); } -#endif /* __APPLE__ */ } +/* + * Returns: 0 Success + * EINVAL + * EOPNOTSUPP + * :EINVAL[AF_UNIX] + * :EINVAL[TCP] + * :EADDRNOTAVAIL[TCP] Address not available. + * :EINVAL[TCP] Invalid argument + * :EAFNOSUPPORT[TCP] Address family not supported [notdef] + * :EACCES[TCP] Permission denied + * :EADDRINUSE[TCP] Address in use + * :EAGAIN[TCP] Resource unavailable, try again + * :EPERM[TCP] Operation not permitted + * :??? + * + * Notes: Other returns depend on the protocol family; all + * returns depend on what the filter author causes + * their filter to return. + */ int -solisten(so, backlog) - register struct socket *so; - int backlog; - +solisten(struct socket *so, int backlog) { struct proc *p = current_proc(); - int error; + int error = 0; + struct socket_filter_entry *filter; + int filtered = 0; socket_lock(so, 1); - - { - struct socket_filter_entry *filter; - int filtered = 0; - error = 0; - for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_listen) { - if (filtered == 0) { - filtered = 1; - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter.sf_listen( - filter->sfe_cookie, so); + if (so->so_proto == NULL) { + error = EINVAL; + goto out; + } + if ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0) { + error = EOPNOTSUPP; + goto out; + } + + /* + * If the listen request is made on a socket that is not fully + * disconnected, or on a previously-accepted socket that has + * been marked as inactive, reject the request now. + */ + if ((so->so_state & + (SS_ISCONNECTED|SS_ISCONNECTING|SS_ISDISCONNECTING)) || + (so->so_flags & SOF_DEFUNCT)) { + error = EINVAL; + goto out; + } + + if ((so->so_restrictions & SO_RESTRICT_DENYIN) != 0) { + error = EPERM; + goto out; + } + + error = 0; + for (filter = so->so_filt; filter && (error == 0); + filter = filter->sfe_next_onsocket) { + if (filter->sfe_filter->sf_filter.sf_listen) { + if (filtered == 0) { + filtered = 1; + sflt_use(so); + socket_unlock(so, 0); } - } - if (filtered != 0) { - socket_lock(so, 0); - sflt_unuse(so); + error = filter->sfe_filter->sf_filter. + sf_listen(filter->sfe_cookie, so); } } + if (filtered != 0) { + socket_lock(so, 0); + sflt_unuse(so); + } if (error == 0) { error = (*so->so_proto->pr_usrreqs->pru_listen)(so, p); } - + if (error) { - socket_unlock(so, 1); if (error == EJUSTRETURN) error = 0; - return (error); + goto out; } - + if (TAILQ_EMPTY(&so->so_comp)) so->so_options |= SO_ACCEPTCONN; - if (backlog < 0 || backlog > somaxconn) + /* + * POSIX: The implementation may have an upper limit on the length of + * the listen queue-either global or per accepting socket. If backlog + * exceeds this limit, the length of the listen queue is set to the + * limit. + * + * If listen() is called with a backlog argument value that is less + * than 0, the function behaves as if it had been called with a backlog + * argument value of 0. + * + * A backlog argument of 0 may allow the socket to accept connections, + * in which case the length of the listen queue may be set to an + * implementation-defined minimum value. + */ + if (backlog <= 0 || backlog > somaxconn) backlog = somaxconn; - so->so_qlimit = backlog; + so->so_qlimit = backlog; +out: socket_unlock(so, 1); - return (0); + return (error); } void -sofreelastref(so, dealloc) - register struct socket *so; - int dealloc; +sofreelastref(struct socket *so, int dealloc) { - int error; struct socket *head = so->so_head; - /*### Assume socket is locked */ + /* Assume socket is locked */ /* Remove any filters - may be called more than once */ sflt_termsock(so); - - if ((!(so->so_flags & SOF_PCBCLEARING)) || ((so->so_state & SS_NOFDREF) == 0)) { + + if ((!(so->so_flags & SOF_PCBCLEARING)) || + ((so->so_state & SS_NOFDREF) == 0)) { #ifdef __APPLE__ selthreadclear(&so->so_snd.sb_sel); selthreadclear(&so->so_rcv.sb_sel); @@ -694,60 +817,108 @@ sofreelastref(so, dealloc) sbrelease(&so->so_snd); #endif sorflush(so); - + /* 3932268: disable upcall */ so->so_rcv.sb_flags &= ~SB_UPCALL; so->so_snd.sb_flags &= ~SB_UPCALL; - + if (dealloc) sodealloc(so); } +void +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 + mutex_held = so->so_proto->pr_domain->dom_mtx; + 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_flags & SOF_UPCALLINUSE) || + !(so->so_flags & SOF_UPCALLCLOSEWAIT)) + return; + + so->so_flags |= SOF_CLOSEWAIT; + (void) msleep((caddr_t)&so->so_upcall, mutex_held, (PZERO - 1), + "soclose_wait_locked", NULL); + lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); + so->so_flags &= ~SOF_CLOSEWAIT; +} + /* * Close a socket on last file table reference removal. * Initiate disconnect if connected. * Free socket when disconnect complete. */ int -soclose_locked(so) - register struct socket *so; +soclose_locked(struct socket *so) { int error = 0; - lck_mtx_t * mutex_held; + lck_mtx_t *mutex_held; struct timespec ts; if (so->so_usecount == 0) { - panic("soclose: so=%x refcount=0\n", so); + panic("soclose: so=%p refcount=0\n", so); } sflt_notify(so, sock_evt_closing, NULL); - + if ((so->so_options & SO_ACCEPTCONN)) { - struct socket *sp; - - /* We do not want new connection to be added to the connection queues */ + struct socket *sp, *sonext; + int socklock = 0; + + /* + * We do not want new connection to be added + * to the connection queues + */ so->so_options &= ~SO_ACCEPTCONN; - - while ((sp = TAILQ_FIRST(&so->so_incomp)) != NULL) { - /* A bit tricky here. We need to keep - * a lock if it's a protocol global lock - * but we want the head, not the socket locked - * in the case of per-socket lock... + + for (sp = TAILQ_FIRST(&so->so_incomp); sp != NULL; sp = sonext) { + sonext = TAILQ_NEXT(sp, so_list); + + /* Radar 5350314 + * skip sockets thrown away by tcpdropdropblreq + * they will get cleanup by the garbage collection. + * otherwise, remove the incomp socket from the queue + * and let soabort trigger the appropriate cleanup. */ + 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); socket_lock(sp, 1); - } - (void) soabort(sp); - if (so->so_proto->pr_getlock != NULL) { - socket_unlock(sp, 1); socket_lock(so, 0); + socklock = 1; + } + + TAILQ_REMOVE(&so->so_incomp, sp, so_list); + so->so_incqlen--; + + if (sp->so_state & SS_INCOMP) { + sp->so_state &= ~SS_INCOMP; + sp->so_head = NULL; + + (void) soabort(sp); } + + if (socklock) + socket_unlock(sp, 1); } while ((sp = TAILQ_FIRST(&so->so_comp)) != NULL) { /* Dequeue from so_comp since sofree() won't do it */ - TAILQ_REMOVE(&so->so_comp, sp, so_list); + TAILQ_REMOVE(&so->so_comp, sp, so_list); so->so_qlen--; if (so->so_proto->pr_getlock != NULL) { @@ -755,10 +926,13 @@ soclose_locked(so) socket_lock(sp, 1); } - sp->so_state &= ~SS_COMP; - sp->so_head = NULL; + if (sp->so_state & SS_COMP) { + sp->so_state &= ~SS_COMP; + sp->so_head = NULL; + + (void) soabort(sp); + } - (void) soabort(sp); if (so->so_proto->pr_getlock != NULL) { socket_unlock(sp, 1); socket_lock(so, 0); @@ -780,17 +954,21 @@ soclose_locked(so) if ((so->so_state & SS_ISDISCONNECTING) && (so->so_state & SS_NBIO)) goto drop; - 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; while (so->so_state & SS_ISCONNECTED) { 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, mutex_held, - PSOCK | PCATCH, "soclos", &ts); + ts.tv_nsec = (so->so_linger % 100) * + NSEC_PER_USEC * 1000 * 10; + error = msleep((caddr_t)&so->so_timeo, + mutex_held, PSOCK | PCATCH, "soclose", &ts); if (error) { - /* It's OK when the time fires, don't report an error */ + /* + * It's OK when the time fires, + * don't report an error + */ if (error == EWOULDBLOCK) error = 0; break; @@ -800,14 +978,14 @@ soclose_locked(so) } drop: if (so->so_usecount == 0) - panic("soclose: usecount is zero so=%x\n", so); + panic("soclose: usecount is zero so=%p\n", so); if (so->so_pcb && !(so->so_flags & SOF_PCBCLEARING)) { int error2 = (*so->so_proto->pr_usrreqs->pru_detach)(so); if (error == 0) error = error2; } if (so->so_usecount <= 0) - panic("soclose: usecount is zero so=%x\n", so); + panic("soclose: usecount is zero so=%p\n", so); discard: if (so->so_pcb && so->so_state & SS_NOFDREF) panic("soclose: NOFDREF"); @@ -822,94 +1000,204 @@ discard: } int -soclose(so) - register struct socket *so; +soclose(struct socket *so) { int error = 0; socket_lock(so, 1); - if (so->so_retaincnt == 0) + + if (so->so_flags & SOF_UPCALLINUSE) + soclose_wait_locked(so); + + if (so->so_retaincnt == 0) { error = soclose_locked(so); - else { /* if the FD is going away, but socket is retained in kernel remove its reference */ + } else { + /* + * if the FD is going away, but socket is + * retained in kernel remove its reference + */ so->so_usecount--; if (so->so_usecount < 2) - panic("soclose: retaincnt non null and so=%x usecount=%x\n", so->so_usecount); + panic("soclose: retaincnt non null and so=%p " + "usecount=%d\n", so, so->so_usecount); } socket_unlock(so, 1); return (error); } - /* * Must be called at splnet... */ -//#### Should already be locked +/* Should already be locked */ int -soabort(so) - struct socket *so; +soabort(struct socket *so) { int error; #ifdef MORE_LOCKING_DEBUG - lck_mtx_t * mutex_held; + 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); #endif - error = (*so->so_proto->pr_usrreqs->pru_abort)(so); - if (error) { - sofree(so); - return error; + if ((so->so_flags & SOF_ABORTED) == 0) { + so->so_flags |= SOF_ABORTED; + error = (*so->so_proto->pr_usrreqs->pru_abort)(so); + if (error) { + sofree(so); + return (error); + } } return (0); } int -soacceptlock(so, nam, dolock) - register struct socket *so; - struct sockaddr **nam; - int dolock; +soacceptlock(struct socket *so, struct sockaddr **nam, int dolock) { int error; - if (dolock) socket_lock(so, 1); + if (dolock) + socket_lock(so, 1); 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) socket_unlock(so, 1); + + if (dolock) + socket_unlock(so, 1); return (error); } + int -soaccept(so, nam) - register struct socket *so; - struct sockaddr **nam; +soaccept(struct socket *so, struct sockaddr **nam) { return (soacceptlock(so, nam, 1)); } int -soconnectlock(so, nam, dolock) - register struct socket *so; - struct sockaddr *nam; - int dolock; +soacceptfilter(struct socket *so) +{ + struct sockaddr *local = NULL, *remote = NULL; + struct socket_filter_entry *filter; + int error = 0, filtered = 0; + struct socket *head = so->so_head; + + /* + * There's no need to hold the lock; this socket + * has not been made visible to the filter(s). + */ + if ((sock_getaddr(so, &remote, 1) != 0) || + sock_getaddr(so, &local, 0) != 0) { + so->so_state &= ~(SS_NOFDREF | SS_COMP); + so->so_head = NULL; + soclose(so); + /* Out of resources; try it again next time */ + error = ECONNABORTED; + goto done; + } + + /* + * At this point, we have a reference on the listening socket + * so we know it won't be going away. Do the same for the newly + * accepted socket while we invoke the accept callback routine. + */ + socket_lock(so, 1); + for (filter = so->so_filt; filter != NULL && error == 0; + filter = filter->sfe_next_onsocket) { + if (filter->sfe_filter->sf_filter.sf_accept != NULL) { + if (!filtered) { + filtered = 1; + sflt_use(so); + socket_unlock(so, 0); + } + error = filter->sfe_filter->sf_filter. + sf_accept(filter->sfe_cookie, + head, so, local, remote); + } + } + + if (filtered) { + socket_lock(so, 0); + sflt_unuse(so); + } + + /* + * If we get EJUSTRETURN from one of the filters, mark this socket + * as inactive and return it anyway. This newly accepted socket + * will be disconnected later before we hand it off to the caller. + */ + if (error == EJUSTRETURN) { + error = 0; + so->so_flags |= SOF_DEFUNCT; + /* Prevent data from being appended to the socket buffers */ + so->so_snd.sb_flags |= SB_DROP; + so->so_rcv.sb_flags |= SB_DROP; + } + if (error != 0) { + /* + * This may seem like a duplication to the above error + * handling part when we return ECONNABORTED, except + * 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; + socket_unlock(so, 1); + soclose(so); + /* Propagate socket filter's error code to the caller */ + } else { + socket_unlock(so, 1); + } +done: + /* Callee checks for NULL pointer */ + sock_freeaddr(remote); + sock_freeaddr(local); + return (error); +} + +/* + * Returns: 0 Success + * EOPNOTSUPP Operation not supported on socket + * EISCONN Socket is connected + * :EADDRNOTAVAIL Address not available. + * :EINVAL Invalid argument + * :EAFNOSUPPORT Address family not supported [notdef] + * :EACCES Permission denied + * :EADDRINUSE Address in use + * :EAGAIN Resource unavailable, try again + * :EPERM Operation not permitted + * :??? [anything a filter writer might set] + */ +int +soconnectlock(struct socket *so, struct sockaddr *nam, int dolock) { - int s; int error; struct proc *p = current_proc(); - if (dolock) socket_lock(so, 1); + if (dolock) + socket_lock(so, 1); - if (so->so_options & SO_ACCEPTCONN) { - if (dolock) socket_unlock(so, 1); + /* + * If this is a listening socket or if this is a previously-accepted + * socket that has been marked as inactive, reject the connect request. + */ + if ((so->so_options & SO_ACCEPTCONN) || (so->so_flags & SOF_DEFUNCT)) { + if (dolock) + socket_unlock(so, 1); return (EOPNOTSUPP); } + + if ((so->so_restrictions & SO_RESTRICT_DENYOUT) != 0) { + if (dolock) + socket_unlock(so, 1); + return (EPERM); + } + /* * If protocol is connection-based, can only connect once. * Otherwise, if connected, try to disconnect first. @@ -918,75 +1206,82 @@ soconnectlock(so, nam, dolock) */ if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) && ((so->so_proto->pr_flags & PR_CONNREQUIRED) || - (error = sodisconnectlocked(so)))) + (error = sodisconnectlocked(so)))) { error = EISCONN; - else { + } else { /* * Run connect filter before calling protocol: * - non-blocking connect returns before completion; */ - { - struct socket_filter_entry *filter; - int filtered = 0; - error = 0; - for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_connect_out) { - if (filtered == 0) { - filtered = 1; - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter.sf_connect_out( - filter->sfe_cookie, so, nam); + struct socket_filter_entry *filter; + int filtered = 0; + + error = 0; + for (filter = so->so_filt; filter && (error == 0); + filter = filter->sfe_next_onsocket) { + if (filter->sfe_filter->sf_filter.sf_connect_out) { + if (filtered == 0) { + filtered = 1; + sflt_use(so); + socket_unlock(so, 0); } + error = filter->sfe_filter->sf_filter. + sf_connect_out(filter->sfe_cookie, so, nam); } - if (filtered != 0) { - socket_lock(so, 0); - sflt_unuse(so); - } } + if (filtered != 0) { + socket_lock(so, 0); + sflt_unuse(so); + } + if (error) { if (error == EJUSTRETURN) error = 0; - if (dolock) socket_unlock(so, 1); - return error; + if (dolock) + socket_unlock(so, 1); + return (error); } - + error = (*so->so_proto->pr_usrreqs->pru_connect)(so, nam, p); } - if (dolock) socket_unlock(so, 1); + if (dolock) + socket_unlock(so, 1); return (error); } int -soconnect(so, nam) - register struct socket *so; - struct sockaddr *nam; +soconnect(struct socket *so, struct sockaddr *nam) { return (soconnectlock(so, nam, 1)); } +/* + * Returns: 0 Success + * :EINVAL[AF_UNIX] + * :EPROTOTYPE[AF_UNIX] + * :??? [other protocol families] + * + * Notes: is not supported by [TCP]. + */ int -soconnect2(so1, so2) - register struct socket *so1; - struct socket *so2; +soconnect2(struct socket *so1, struct socket *so2) { int error; -//####### Assumes so1 is already locked / - socket_lock(so2, 1); + socket_lock(so1, 1); + if (so2->so_proto->pr_lock) + socket_lock(so2, 1); error = (*so1->so_proto->pr_usrreqs->pru_connect2)(so1, so2); - - socket_unlock(so2, 1); + + socket_unlock(so1, 1); + if (so2->so_proto->pr_lock) + socket_unlock(so2, 1); return (error); } - int -sodisconnectlocked(so) - register struct socket *so; +sodisconnectlocked(struct socket *so) { int error; @@ -998,27 +1293,26 @@ sodisconnectlocked(so) error = EALREADY; goto bad; } - + error = (*so->so_proto->pr_usrreqs->pru_disconnect)(so); - + if (error == 0) { sflt_notify(so, sock_evt_disconnected, NULL); } - bad: return (error); } -//### Locking version + +/* Locking version */ int -sodisconnect(so) - register struct socket *so; +sodisconnect(struct socket *so) { - int error; + int error; socket_lock(so, 1); error = sodisconnectlocked(so); socket_unlock(so, 1); - return(error); + return (error); } #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_DONTWAIT : M_WAIT) @@ -1026,17 +1320,18 @@ sodisconnect(so) /* * sosendcheck will lock the socket buffer if it isn't locked and * verify that there is space for the data being inserted. + * + * Returns: 0 Success + * EPIPE + * sblock:EWOULDBLOCK + * sblock:EINTR + * sbwait:EBADF + * sbwait:EINTR + * [so_error]:??? */ - static int -sosendcheck( - struct socket *so, - struct sockaddr *addr, - long resid, - long clen, - long atomic, - int flags, - int *sblocked) +sosendcheck(struct socket *so, struct sockaddr *addr, long resid, long clen, + long atomic, int flags, int *sblocked) { int error = 0; long space; @@ -1045,8 +1340,8 @@ sosendcheck( restart: if (*sblocked == 0) { if ((so->so_snd.sb_flags & SB_LOCK) != 0 && - so->so_send_filt_thread != 0 && - so->so_send_filt_thread == current_thread()) { + so->so_send_filt_thread != 0 && + so->so_send_filt_thread == current_thread()) { /* * We're being called recursively from a filter, * allow this to continue. Radar 4150520. @@ -1054,60 +1349,63 @@ restart: * to perform an unlock later. */ assumelock = 1; - } - else { + } else { error = sblock(&so->so_snd, SBLOCKWAIT(flags)); if (error) { - return error; + return (error); } *sblocked = 1; } } - - if (so->so_state & SS_CANTSENDMORE) - return EPIPE; - + + /* + * If a send attempt is made on a previously-accepted socket + * that has been marked as inactive (disconnected), reject + * the request. + */ + if (so->so_flags & SOF_DEFUNCT) + return (ENOTCONN); + + if (so->so_state & SS_CANTSENDMORE) + 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) { - /* - * `sendto' and `sendmsg' is allowed on a connection- - * based socket if it supports implied connect. - * Return ENOTCONN if not connected and no address is - * supplied. - */ - if ((so->so_proto->pr_flags & PR_CONNREQUIRED) && - (so->so_proto->pr_flags & PR_IMPLOPCL) == 0) { + if ((so->so_proto->pr_flags & PR_CONNREQUIRED) != 0) { if ((so->so_state & SS_ISCONFIRMING) == 0 && - !(resid == 0 && clen != 0)) - return ENOTCONN; - } else if (addr == 0 && !(flags&MSG_HOLD)) - return (so->so_proto->pr_flags & PR_CONNREQUIRED) ? ENOTCONN : EDESTADDRREQ; + !(resid == 0 && clen != 0)) + return (ENOTCONN); + } else if (addr == 0 && !(flags&MSG_HOLD)) { + return ((so->so_proto->pr_flags & PR_CONNREQUIRED) ? + ENOTCONN : EDESTADDRREQ); + } } 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; - if (space < resid + clen && - (atomic || space < so->so_snd.sb_lowat || space < clen)) { - if ((so->so_state & SS_NBIO) || (flags & MSG_NBIO) || assumelock) { - return EWOULDBLOCK; + clen > so->so_snd.sb_hiwat) + return (EMSGSIZE); + if (space < resid + clen && + (atomic || space < (long)so->so_snd.sb_lowat || space < clen)) { + if ((so->so_state & SS_NBIO) || (flags & MSG_NBIO) || + assumelock) { + return (EWOULDBLOCK); } sbunlock(&so->so_snd, 1); error = sbwait(&so->so_snd); if (error) { - return error; + return (error); } goto restart; } - - return 0; + + return (0); } /* @@ -1130,16 +1428,49 @@ restart: * 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 + * EINVAL + * ENOBUFS + * uiomove:EFAULT + * sosendcheck:EPIPE + * sosendcheck:EWOULDBLOCK + * sosendcheck:EINTR + * sosendcheck:EBADF + * sosendcheck:EINTR + * sosendcheck:??? [value from so_error] + * :ECONNRESET[TCP] + * :EINVAL[TCP] + * :ENOBUFS[TCP] + * :EADDRINUSE[TCP] + * :EADDRNOTAVAIL[TCP] + * :EAFNOSUPPORT[TCP] + * :EACCES[TCP] + * :EAGAIN[TCP] + * :EPERM[TCP] + * :EMSGSIZE[TCP] + * :EHOSTUNREACH[TCP] + * :ENETUNREACH[TCP] + * :ENETDOWN[TCP] + * :ENOMEM[TCP] + * :ENOBUFS[TCP] + * :???[TCP] [ignorable: mostly IPSEC/firewall/DLIL] + * :EINVAL[AF_UNIX] + * :EOPNOTSUPP[AF_UNIX] + * :EPIPE[AF_UNIX] + * :ENOTCONN[AF_UNIX] + * :EISCONN[AF_UNIX] + * :???[AF_UNIX] [whatever a filter author chooses] + * :??? [whatever a filter author chooses] + * + * Notes: Other returns depend on the protocol family; all + * returns depend on what the filter author causes + * their filter to return. */ int -sosend(so, addr, uio, top, control, flags) - register struct socket *so; - struct sockaddr *addr; - struct uio *uio; - struct mbuf *top; - struct mbuf *control; - int flags; - +sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, + struct mbuf *top, struct mbuf *control, int flags) { struct mbuf **mp; register struct mbuf *m, *freelist = NULL; @@ -1149,20 +1480,21 @@ sosend(so, addr, uio, top, control, flags) int sblocked = 0; struct proc *p = current_proc(); - if (uio) + if (uio) { // LP64todo - fix this! 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); + } + 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); + if (so->so_type != SOCK_STREAM && (flags & MSG_OOB) != 0) { + error = EOPNOTSUPP; + socket_unlock(so, 1); + goto out; + } /* * In theory resid should be unsigned. @@ -1184,21 +1516,26 @@ sosend(so, addr, uio, top, control, flags) (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 && (so->so_proto->pr_flags & PR_ATOMIC); if (p) - p->p_stats->p_ru.ru_msgsnd++; + OSIncrementAtomic(&p->p_stats->p_ru.ru_msgsnd); if (control) clen = control->m_len; do { - error = sosendcheck(so, addr, resid, clen, atomic, flags, &sblocked); + error = sosendcheck(so, addr, resid, clen, atomic, flags, + &sblocked); if (error) { goto release; } mp = ⊤ - space = sbspace(&so->so_snd) - clen + ((flags & MSG_OOB) ? 1024 : 0); + space = sbspace(&so->so_snd) - clen + ((flags & MSG_OOB) ? + 1024 : 0); do { - - if (uio == NULL) { + struct socket_filter_entry *filter; + int filtered; + boolean_t recursive; + + if (uio == NULL) { /* * Data is prepackaged in "top". */ @@ -1206,55 +1543,119 @@ sosend(so, addr, uio, top, control, flags) if (flags & MSG_EOR) top->m_flags |= M_EOR; } else { - int chainlength; - int bytes_to_copy; - + int chainlength; + int bytes_to_copy; + boolean_t jumbocl; + bytes_to_copy = min(resid, space); - + if (sosendminchain > 0) { chainlength = 0; - } else + } else { chainlength = sosendmaxchain; - + } + + /* + * Attempt to use larger than system page-size + * clusters for large writes only if there is + * a jumbo cluster pool and if the socket is + * marked accordingly. + */ + jumbocl = sosendjcl && njcl > 0 && + ((so->so_flags & SOF_MULTIPAGES) || + sosendjcl_ignore_capab); + socket_unlock(so, 0); - + do { int num_needed; int hdrs_needed = (top == 0) ? 1 : 0; - + /* - * try to maintain a local cache of mbuf clusters needed to complete this write - * the list is further limited to the number that are currently needed to fill the socket - * this mechanism allows a large number of mbufs/clusters to be grabbed under a single - * mbuf lock... if we can't get any clusters, than fall back to trying for mbufs - * if we fail early (or miscalcluate the number needed) make sure to release any clusters - * we haven't yet consumed. + * try to maintain a local cache of mbuf + * clusters needed to complete this + * write the list is further limited to + * the number that are currently needed + * to fill the socket this mechanism + * allows a large number of mbufs/ + * clusters to be grabbed under a single + * mbuf lock... if we can't get any + * clusters, than fall back to trying + * for mbufs if we fail early (or + * miscalcluate the number needed) make + * sure to release any clusters we + * haven't yet consumed. */ - if (freelist == NULL && bytes_to_copy > MCLBYTES) { - num_needed = bytes_to_copy / NBPG; + if (freelist == NULL && + bytes_to_copy > NBPG && jumbocl) { + num_needed = + bytes_to_copy / M16KCLBYTES; + + if ((bytes_to_copy - + (num_needed * M16KCLBYTES)) + >= MINCLSIZE) + num_needed++; - if ((bytes_to_copy - (num_needed * NBPG)) >= MINCLSIZE) + freelist = + m_getpackets_internal( + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + M16KCLBYTES); + /* + * Fall back to 4K cluster size + * if allocation failed + */ + } + + if (freelist == NULL && + bytes_to_copy > MCLBYTES) { + num_needed = + bytes_to_copy / NBPG; + + if ((bytes_to_copy - + (num_needed * NBPG)) >= + MINCLSIZE) num_needed++; - - freelist = m_getpackets_internal(&num_needed, hdrs_needed, M_WAIT, 0, NBPG); - /* Fall back to cluster size if allocation failed */ + + freelist = + m_getpackets_internal( + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + NBPG); + /* + * Fall back to cluster size + * if allocation failed + */ } - - if (freelist == NULL && bytes_to_copy > MINCLSIZE) { - num_needed = bytes_to_copy / MCLBYTES; - - if ((bytes_to_copy - (num_needed * MCLBYTES)) >= MINCLSIZE) + + if (freelist == NULL && + bytes_to_copy > MINCLSIZE) { + num_needed = + bytes_to_copy / MCLBYTES; + + if ((bytes_to_copy - + (num_needed * MCLBYTES)) >= + MINCLSIZE) num_needed++; - - freelist = m_getpackets_internal(&num_needed, hdrs_needed, M_WAIT, 0, MCLBYTES); - /* Fall back to a single mbuf if allocation failed */ + + freelist = + m_getpackets_internal( + (unsigned int *)&num_needed, + hdrs_needed, M_WAIT, 0, + MCLBYTES); + /* + * Fall back to a single mbuf + * if allocation failed + */ } - + if (freelist == NULL) { if (top == 0) - MGETHDR(freelist, M_WAIT, MT_DATA); + MGETHDR(freelist, + M_WAIT, MT_DATA); else - MGET(freelist, M_WAIT, MT_DATA); + MGET(freelist, + M_WAIT, MT_DATA); if (freelist == NULL) { error = ENOBUFS; @@ -1262,37 +1663,43 @@ sosend(so, addr, uio, top, control, flags) goto release; } /* - * For datagram protocols, leave room - * for protocol headers in first mbuf. + * For datagram protocols, + * leave room for protocol + * headers in first mbuf. */ - if (atomic && top == 0 && bytes_to_copy < MHLEN) - MH_ALIGN(freelist, bytes_to_copy); + if (atomic && top == 0 && + bytes_to_copy < MHLEN) { + MH_ALIGN(freelist, + bytes_to_copy); + } } m = freelist; 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)) - mlen = MHLEN - m_leadingspace(m); + mlen = + MHLEN - m_leadingspace(m); else mlen = MLEN; len = min(mlen, bytes_to_copy); chainlength += len; - + space -= len; - error = uiomove(mtod(m, caddr_t), (int)len, uio); - + error = uiomove(mtod(m, caddr_t), + (int)len, uio); + // LP64todo - fix this! resid = uio_resid(uio); - + m->m_len = len; *mp = m; top->m_pkthdr.len += len; - if (error) + if (error) break; mp = &m->m_next; if (resid <= 0) { @@ -1301,21 +1708,21 @@ sosend(so, addr, uio, top, control, flags) break; } bytes_to_copy = min(resid, space); - - } while (space > 0 && (chainlength < sosendmaxchain || atomic || resid < MINCLSIZE)); - + + } while (space > 0 && + (chainlength < sosendmaxchain || atomic || + resid < MINCLSIZE)); + socket_lock(so, 0); - + if (error) goto release; } - - if (flags & (MSG_HOLD|MSG_SEND)) - { + + if (flags & (MSG_HOLD|MSG_SEND)) { /* Enqueue for later, go away if HOLD */ register struct mbuf *mb1; - if (so->so_temp && (flags & MSG_FLUSH)) - { + if (so->so_temp && (flags & MSG_FLUSH)) { m_freem(so->so_temp); so->so_temp = NULL; } @@ -1325,100 +1732,106 @@ sosend(so, addr, uio, top, control, flags) so->so_temp = top; mb1 = top; while (mb1->m_next) - mb1 = mb1->m_next; + mb1 = mb1->m_next; so->so_tail = mb1; - if (flags & MSG_HOLD) - { + if (flags & MSG_HOLD) { top = NULL; goto release; } top = so->so_temp; - } - if (dontroute) - so->so_options |= SO_DONTROUTE; - /* Compute flags here, for pru_send and NKEs */ - 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)) ? + } + if (dontroute) + so->so_options |= SO_DONTROUTE; + + /* Compute flags here, for pru_send and NKEs */ + 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; - + /* If there is more to send set PRUS_MORETOCOME */ + (resid > 0 && space > 0) ? PRUS_MORETOCOME : 0; + /* * Socket filter processing */ - { - struct socket_filter_entry *filter; - int filtered; - - filtered = 0; - error = 0; - for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_data_out) { - int so_flags = 0; - if (filtered == 0) { - filtered = 1; - so->so_send_filt_thread = current_thread(); - sflt_use(so); - socket_unlock(so, 0); - so_flags = (sendflags & MSG_OOB) ? sock_data_filt_flag_oob : 0; - } - error = filter->sfe_filter->sf_filter.sf_data_out( - filter->sfe_cookie, so, addr, &top, &control, so_flags); + recursive = (so->so_send_filt_thread != NULL); + filtered = 0; + error = 0; + for (filter = so->so_filt; filter && (error == 0); + filter = filter->sfe_next_onsocket) { + if (filter->sfe_filter->sf_filter.sf_data_out) { + int so_flags = 0; + if (filtered == 0) { + filtered = 1; + so->so_send_filt_thread = + current_thread(); + sflt_use(so); + socket_unlock(so, 0); + so_flags = + (sendflags & MSG_OOB) ? + sock_data_filt_flag_oob : 0; } + error = filter->sfe_filter->sf_filter. + sf_data_out(filter->sfe_cookie, so, + addr, &top, &control, so_flags); } - - if (filtered) { - /* - * At this point, we've run at least one filter. - * The socket is unlocked as is the socket buffer. - */ - socket_lock(so, 0); - sflt_unuse(so); + } + + if (filtered) { + /* + * At this point, we've run at least one + * filter. The socket is unlocked as is + * the socket buffer. Clear the recorded + * filter thread only when we are outside + * of a filter's context. This allows for + * a filter to issue multiple inject calls + * from its sf_data_out callback routine. + */ + socket_lock(so, 0); + sflt_unuse(so); + if (!recursive) so->so_send_filt_thread = 0; - if (error) { - if (error == EJUSTRETURN) { - error = 0; - clen = 0; - control = 0; - top = 0; - } - - goto release; + if (error) { + if (error == EJUSTRETURN) { + error = 0; + clen = 0; + control = 0; + top = 0; } + + goto release; } } /* * End Socket filter processing */ - + if (error == EJUSTRETURN) { /* A socket filter handled this data */ error = 0; - } - else { - error = (*so->so_proto->pr_usrreqs->pru_send)(so, - sendflags, top, addr, control, p); + } else { + error = (*so->so_proto->pr_usrreqs->pru_send) + (so, sendflags, top, addr, control, p); } #ifdef __APPLE__ - if (flags & MSG_SEND) - so->so_temp = NULL; + if (flags & MSG_SEND) + so->so_temp = NULL; #endif - if (dontroute) - so->so_options &= ~SO_DONTROUTE; - clen = 0; - control = 0; - top = 0; - mp = ⊤ - if (error) - goto release; + if (dontroute) + so->so_options &= ~SO_DONTROUTE; + + clen = 0; + control = 0; + top = 0; + mp = ⊤ + if (error) + goto release; } while (resid && space > 0); } while (resid); @@ -1433,14 +1846,10 @@ out: if (control) m_freem(control); if (freelist) - m_freem_list(freelist); + m_freem_list(freelist); - KERNEL_DEBUG(DBG_FNC_SOSEND | DBG_FUNC_END, - so, - resid, - so->so_snd.sb_cc, - space, - error); + KERNEL_DEBUG(DBG_FNC_SOSEND | DBG_FUNC_END, so, resid, so->so_snd.sb_cc, + space, error); return (error); } @@ -1460,15 +1869,31 @@ out: * 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 + * :EINVAL[TCP] + * :EWOULDBLOCK[TCP] + * :??? + * dom_externalize>:EMSGSIZE[AF_UNIX] + * dom_externalize>:ENOBUFS[AF_UNIX] + * dom_externalize>:??? + * + * Notes: Additional return values from calls through and + * dom_externalize> depend on protocols other than + * TCP or AF_UNIX, which are documented above. */ int -soreceive(so, psa, uio, mp0, controlp, flagsp) - register struct socket *so; - struct sockaddr **psa; - struct uio *uio; - struct mbuf **mp0; - struct mbuf **controlp; - int *flagsp; +soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio, + struct mbuf **mp0, struct mbuf **controlp, int *flagsp) { register struct mbuf *m, **mp, *ml = NULL; register int flags, len, error, offset; @@ -1477,20 +1902,15 @@ soreceive(so, psa, uio, mp0, controlp, flagsp) int moff, type = 0; // LP64todo - fix this! int orig_resid = uio_resid(uio); - volatile struct mbuf *free_list; - volatile int delayed_copy_len; + struct mbuf *free_list; + int delayed_copy_len; int can_delay; int need_event; struct proc *p = current_proc(); - - // LP64todo - fix this! - 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); + // LP64todo - fix this! + 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); @@ -1507,19 +1927,39 @@ soreceive(so, psa, uio, mp0, controlp, flagsp) flags = *flagsp &~ MSG_EOR; else flags = 0; - /* - * When SO_WANTOOBFLAG is set we try to get out-of-band data - * regardless of the flags argument. Here is the case were - * out-of-band data is not inline. - */ - if ((flags & MSG_OOB) || - ((so->so_options & SO_WANTOOBFLAG) != 0 && - (so->so_options & SO_OOBINLINE) == 0 && - (so->so_oobmark || (so->so_state & SS_RCVATMARK)))) { + + /* + * If a recv attempt is made on a previously-accepted socket + * that has been marked as inactive (disconnected), reject + * the request. + */ + if (so->so_flags & SOF_DEFUNCT) { + struct sockbuf *sb = &so->so_rcv; + + /* + * This socket should have been disconnected and flushed + * prior to being returned from accept; there should be + * no data on its receive list, so panic otherwise. + */ + sb_empty_assert(sb, __func__); + socket_unlock(so, 1); + return (ENOTCONN); + } + + /* + * When SO_WANTOOBFLAG is set we try to get out-of-band data + * regardless of the flags argument. Here is the case were + * out-of-band data is not inline. + */ + if ((flags & MSG_OOB) || + ((so->so_options & SO_WANTOOBFLAG) != 0 && + (so->so_options & SO_OOBINLINE) == 0 && + (so->so_oobmark || (so->so_state & SS_RCVATMARK)))) { m = m_get(M_WAIT, MT_DATA); if (m == NULL) { socket_unlock(so, 1); - KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, ENOBUFS,0,0,0,0); + KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, + ENOBUFS, 0, 0, 0, 0); return (ENOBUFS); } error = (*pr->pr_usrreqs->pru_rcvoob)(so, m, flags & MSG_PEEK); @@ -1529,7 +1969,7 @@ soreceive(so, psa, uio, mp0, controlp, flagsp) do { // LP64todo - fix this! error = uiomove(mtod(m, caddr_t), - (int) min(uio_resid(uio), m->m_len), uio); + (int)min(uio_resid(uio), m->m_len), uio); m = m_free(m); } while (uio_resid(uio) && error == 0 && m); socket_lock(so, 0); @@ -1539,18 +1979,21 @@ bad: #ifdef __APPLE__ if ((so->so_options & SO_WANTOOBFLAG) != 0) { if (error == EWOULDBLOCK || error == EINVAL) { - /* + /* * Let's try to get normal data: - * EWOULDBLOCK: out-of-band data not receive yet; - * EINVAL: out-of-band data already read. + * EWOULDBLOCK: out-of-band data not + * receive yet. EINVAL: out-of-band data + * already read. */ error = 0; goto nooob; - } else if (error == 0 && flagsp) + } else if (error == 0 && flagsp) { *flagsp |= MSG_OOB; - } + } + } socket_unlock(so, 1); - KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error,0,0,0,0); + KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error, + 0, 0, 0, 0); #endif return (error); } @@ -1566,12 +2009,32 @@ nooob: restart: #ifdef MORE_LOCKING_DEBUG if (so->so_usecount <= 1) - printf("soreceive: sblock so=%x ref=%d on socket\n", so, so->so_usecount); + printf("soreceive: sblock so=%p ref=%d on socket\n", + so, so->so_usecount); #endif + /* + * See if the socket has been closed (SS_NOFDREF|SS_CANTRCVMORE) + * and if so just return to the caller. This could happen when + * soreceive() is called by a socket upcall function during the + * time the socket is freed. The socket buffer would have been + * locked across the upcall, therefore we cannot put this thread + * to sleep (else we will deadlock) or return EWOULDBLOCK (else + * we may livelock), because the lock on the socket buffer will + * only be released when the upcall routine returns to its caller. + * Because the socket has been officially closed, there can be + * no further read on it. + */ + if ((so->so_state & (SS_NOFDREF | SS_CANTRCVMORE)) == + (SS_NOFDREF | SS_CANTRCVMORE)) { + socket_unlock(so, 1); + return (0); + } + error = sblock(&so->so_rcv, SBLOCKWAIT(flags)); if (error) { socket_unlock(so, 1); - KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error,0,0,0,0); + KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error, + 0, 0, 0, 0); return (error); } @@ -1589,11 +2052,20 @@ restart: */ if (m == 0 || (((flags & MSG_DONTWAIT) == 0 && so->so_rcv.sb_cc < uio_resid(uio)) && - (so->so_rcv.sb_cc < so->so_rcv.sb_lowat || + (so->so_rcv.sb_cc < so->so_rcv.sb_lowat || ((flags & MSG_WAITALL) && uio_resid(uio) <= so->so_rcv.sb_hiwat)) && m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) { + /* + * Panic if we notice inconsistencies in the socket's + * receive list; both sb_mb and sb_cc should correctly + * reflect the contents of the list, otherwise we may + * end up with false positives during select() or poll() + * which could put the application in a bad state. + */ + if (m == NULL && so->so_rcv.sb_cc != 0) + panic("soreceive corrupted so_rcv: m %p cc %lu", + m, so->so_rcv.sb_cc); - KASSERT(m != 0 || !so->so_rcv.sb_cc, ("receive 1")); if (so->so_error) { if (m) goto dontblock; @@ -1609,7 +2081,7 @@ restart: goto release; } for (; m; m = m->m_next) - if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) { + if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) { m = so->so_rcv.sb_mb; goto dontblock; } @@ -1620,27 +2092,32 @@ restart: } if (uio_resid(uio) == 0) goto release; - if ((so->so_state & SS_NBIO) || (flags & (MSG_DONTWAIT|MSG_NBIO))) { + if ((so->so_state & SS_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, 1); -#ifdef EVEN_MORE_LOCKING_DEBUG +#if EVEN_MORE_LOCKING_DEBUG if (socket_debug) - printf("Waiting for socket data\n"); + printf("Waiting for socket data\n"); #endif error = sbwait(&so->so_rcv); -#ifdef EVEN_MORE_LOCKING_DEBUG +#if EVEN_MORE_LOCKING_DEBUG if (socket_debug) - printf("SORECEIVE - sbwait returned %d\n", error); + printf("SORECEIVE - sbwait returned %d\n", error); #endif if (so->so_usecount < 1) - panic("soreceive: after 2nd sblock so=%x ref=%d on socket\n", so, so->so_usecount); + panic("soreceive: after 2nd sblock so=%p ref=%d on " + "socket\n", so, so->so_usecount); if (error) { socket_unlock(so, 1); - KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error,0,0,0,0); - return (error); + KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, error, + 0, 0, 0, 0); + return (error); } goto restart; } @@ -1656,15 +2133,84 @@ dontblock: * fill out the uio structure properly. */ if (p) - p->p_stats->p_ru.ru_msgrcv++; + OSIncrementAtomic(&p->p_stats->p_ru.ru_msgrcv); #endif /* __APPLE__ */ + 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, 1); + goto restart; + } + socket_lock(so, 0); + /* + * 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 */ orig_resid = 0; if (psa) { *psa = dup_sockaddr(mtod(m, struct sockaddr *), - mp0 == 0); + mp0 == 0); if ((*psa == 0) && (flags & MSG_NEEDSA)) { error = EWOULDBLOCK; goto release; @@ -1675,56 +2221,152 @@ dontblock: } else { sbfree(&so->so_rcv, m); if (m->m_next == 0 && so->so_rcv.sb_cc != 0) - panic("soreceive: about to create invalid socketbuf"); + panic("soreceive: about to create invalid " + "socketbuf"); 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); + } } } - while (m && m->m_type == MT_CONTROL && error == 0) { - if (flags & MSG_PEEK) { - if (controlp) - *controlp = m_copy(m, 0, m->m_len); - m = m->m_next; - } else { - sbfree(&so->so_rcv, m); - if (controlp) { - if (pr->pr_domain->dom_externalize && - mtod(m, struct cmsghdr *)->cmsg_type == - SCM_RIGHTS) { - socket_unlock(so, 0); /* release socket lock: see 3903171 */ - error = (*pr->pr_domain->dom_externalize)(m); - socket_lock(so, 0); + + /* + * 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) { + struct mbuf *cm = NULL, *cmn; + struct mbuf **cme = &cm; + struct sockbuf *sb_rcv = &so->so_rcv; + + /* + * 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) { + *controlp = m_copy(m, 0, m->m_len); + controlp = &(*controlp)->m_next; } - *controlp = m; - if (m->m_next == 0 && so->so_rcv.sb_cc != 0) - panic("soreceive: so->so_rcv.sb_mb->m_next == 0 && so->so_rcv.sb_cc != 0"); - so->so_rcv.sb_mb = m->m_next; - m->m_next = 0; - m = so->so_rcv.sb_mb; + m = m->m_next; } else { - MFREE(m, so->so_rcv.sb_mb); - m = so->so_rcv.sb_mb; + 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; } - if (controlp) { - orig_resid = 0; - controlp = &(*controlp)->m_next; + + 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; } + orig_resid = 0; + if (sb_rcv->sb_mb != NULL) + nextrecord = sb_rcv->sb_mb->m_nextpkt; + else + nextrecord = NULL; } - if (m) { - if ((flags & MSG_PEEK) == 0) - m->m_nextpkt = nextrecord; + + if (m != NULL) { + if (!(flags & MSG_PEEK)) { + /* + * We get here because m points to an mbuf following + * any MT_SONAME or MT_CONTROL mbufs which have been + * processed above. In any case, m should be pointing + * to the head of the mbuf chain, and the nextrecord + * should be either NULL or equal to m->m_nextpkt. + * See comments above about SB_LOCK. + */ + if (m != so->so_rcv.sb_mb || m->m_nextpkt != nextrecord) + panic("soreceive: post-control !sync so=%p " + "m=%p nextrecord=%p\n", so, m, nextrecord); + + if (nextrecord == NULL) + so->so_rcv.sb_lastrecord = m; + } type = m->m_type; if (type == MT_OOBDATA) flags |= MSG_OOB; + } else { + if (!(flags & MSG_PEEK)) { + so->so_rcv.sb_mb = nextrecord; + SB_EMPTY_FIXUP(&so->so_rcv); + } } + SBLASTRECORDCHK(&so->so_rcv, "soreceive 2"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive 2"); + moff = 0; offset = 0; if (!(flags & MSG_PEEK) && uio_resid(uio) > sorecvmincopy) - can_delay = 1; + can_delay = 1; else - can_delay = 0; + can_delay = 0; need_event = 0; @@ -1732,28 +2374,18 @@ dontblock: if (m->m_type == MT_OOBDATA) { if (type != MT_OOBDATA) break; - } else if (type == MT_OOBDATA) + } else if (type == MT_OOBDATA) { break; -#ifndef __APPLE__ -/* - * This assertion needs rework. The trouble is Appletalk is uses many - * mbuf types (NOT listed in mbuf.h!) which will trigger this panic. - * For now just remove the assertion... CSM 9/98 - */ - else - KASSERT(m->m_type == MT_DATA || m->m_type == MT_HEADER, - ("receive 3")); -#else + } /* - * Make sure to allways set MSG_OOB event when getting + * Make sure to allways set MSG_OOB event when getting * out of band data inline. */ if ((so->so_options & SO_WANTOOBFLAG) != 0 && - (so->so_options & SO_OOBINLINE) != 0 && - (so->so_state & SS_RCVATMARK) != 0) { + (so->so_options & SO_OOBINLINE) != 0 && + (so->so_state & SS_RCVATMARK) != 0) { flags |= MSG_OOB; } -#endif so->so_state &= ~SS_RCVATMARK; // LP64todo - fix this! len = uio_resid(uio) - delayed_copy_len; @@ -1770,47 +2402,55 @@ dontblock: * block interrupts again. */ if (mp == 0) { + SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove"); if (can_delay && len == m->m_len) { - /* + /* * only delay the copy if we're consuming the * mbuf and we're NOT in MSG_PEEK mode * and we have enough data to make it worthwile - * to drop and retake the funnel... can_delay - * reflects the state of the 2 latter constraints - * moff should always be zero in these cases + * to drop and retake the lock... can_delay + * reflects the state of the 2 latter + * constraints moff should always be zero + * in these cases */ - delayed_copy_len += len; + delayed_copy_len += len; } else { - - if (delayed_copy_len) { - error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); + if (delayed_copy_len) { + error = sodelayed_copy(so, uio, + &free_list, &delayed_copy_len); if (error) { goto release; } + /* + * can only get here if MSG_PEEK is not + * set therefore, m should point at the + * head of the rcv queue; if it doesn't, + * it means something drastically + * changed while we were out from behind + * the lock in sodelayed_copy. perhaps + * a RST on the stream. in any event, + * the stream has been interrupted. it's + * probably best just to return whatever + * data we've moved and let the caller + * sort it out... + */ if (m != so->so_rcv.sb_mb) { - /* - * can only get here if MSG_PEEK is not set - * therefore, m should point at the head of the rcv queue... - * if it doesn't, it means something drastically changed - * while we were out from behind the funnel in sodelayed_copy... - * perhaps a RST on the stream... in any event, the stream has - * been interrupted... it's probably best just to return - * whatever data we've moved and let the caller sort it out... - */ - break; + break; } } socket_unlock(so, 0); - error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio); + error = uiomove(mtod(m, caddr_t) + moff, + (int)len, uio); socket_lock(so, 0); if (error) - goto release; + goto release; } - } else + } else { uio_setresid(uio, (uio_resid(uio) - len)); - + } if (len == m->m_len - moff) { if (m->m_flags & M_EOR) flags |= MSG_EOR; @@ -1829,20 +2469,28 @@ dontblock: *mp = (struct mbuf *)0; } else { if (free_list == NULL) - free_list = m; - else - ml->m_next = m; - ml = m; + free_list = m; + else + ml->m_next = m; + ml = m; so->so_rcv.sb_mb = m = m->m_next; - ml->m_next = 0; + ml->m_next = 0; } - if (m) + if (m != NULL) { m->m_nextpkt = nextrecord; + if (nextrecord == NULL) + so->so_rcv.sb_lastrecord = m; + } else { + so->so_rcv.sb_mb = nextrecord; + SB_EMPTY_FIXUP(&so->so_rcv); + } + SBLASTRECORDCHK(&so->so_rcv, "soreceive 3"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive 3"); } } else { - if (flags & MSG_PEEK) + if (flags & MSG_PEEK) { moff += len; - else { + } else { if (mp) *mp = m_copym(m, 0, len, M_WAIT); m->m_data += len; @@ -1854,13 +2502,14 @@ dontblock: if ((flags & MSG_PEEK) == 0) { 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; + 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; @@ -1868,45 +2517,68 @@ dontblock: 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 "uio->uio_resid == 0" or an error - * termination. If a signal/timeout occurs, return - * with a short count but without error. - * Keep sockbuf locked against other readers. + * If the MSG_WAITALL or MSG_WAITSTREAM flag is set + * (for non-atomic socket), we must not quit until + * "uio->uio_resid == 0" or an error termination. + * If a signal/timeout occurs, return with a short + * count but without error. Keep sockbuf locked + * against other readers. */ - while (flags & (MSG_WAITALL|MSG_WAITSTREAM) && m == 0 && (uio_resid(uio) - delayed_copy_len) > 0 && + while (flags & (MSG_WAITALL|MSG_WAITSTREAM) && m == 0 && + (uio_resid(uio) - delayed_copy_len) > 0 && !sosendallatonce(so) && !nextrecord) { if (so->so_error || so->so_state & SS_CANTRCVMORE) - goto release; + goto release; + + /* + * 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 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)) + (*pr->pr_usrreqs->pru_rcvd)(so, flags); + + SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2"); - if (pr->pr_flags & PR_WANTRCVD && so->so_pcb && (((struct inpcb *)so->so_pcb)->inp_state != INPCB_STATE_DEAD)) - (*pr->pr_usrreqs->pru_rcvd)(so, flags); - if (sbwait(&so->so_rcv)) { - error = 0; + if (so->so_rcv.sb_mb == NULL && sbwait(&so->so_rcv)) { + error = 0; goto release; } /* - * have to wait until after we get back from the sbwait to do the copy because - * we will drop the funnel if we have enough data that has been delayed... by dropping - * the funnel we open up a window allowing the netisr thread to process the incoming packets - * and to change the state of this socket... we're issuing the sbwait because - * the socket is empty and we're expecting the netisr thread to wake us up when more - * packets arrive... if we allow that processing to happen and then sbwait, we - * could stall forever with packets sitting in the socket if no further packets - * arrive from the remote side. + * have to wait until after we get back from the sbwait + * to do the copy because we will drop the lock if we + * have enough data that has been delayed... by dropping + * the lock we open up a window allowing the netisr + * thread to process the incoming packets and to change + * the state of this socket... we're issuing the sbwait + * because the socket is empty and we're expecting the + * netisr thread to wake us up when more packets arrive; + * if we allow that processing to happen and then sbwait + * we could stall forever with packets sitting in the + * socket if no further packets arrive from the remote + * side. * - * we want to copy before we've collected all the data to satisfy this request to - * allow the copy to overlap the incoming packet processing on an MP system + * we want to copy before we've collected all the data + * to satisfy this request to allow the copy to overlap + * the incoming packet processing on an MP system */ - if (delayed_copy_len > sorecvmincopy && (delayed_copy_len > (so->so_rcv.sb_hiwat / 2))) { - - error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); + if (delayed_copy_len > sorecvmincopy && + (delayed_copy_len > (so->so_rcv.sb_hiwat / 2))) { + error = sodelayed_copy(so, uio, + &free_list, &delayed_copy_len); if (error) - goto release; + goto release; } m = so->so_rcv.sb_mb; if (m) { @@ -1916,14 +2588,15 @@ dontblock: } #ifdef MORE_LOCKING_DEBUG if (so->so_usecount <= 1) - panic("soreceive: after big while so=%x ref=%d on socket\n", so, so->so_usecount); + panic("soreceive: after big while so=%p ref=%d on socket\n", + so, so->so_usecount); #endif if (m && pr->pr_flags & PR_ATOMIC) { #ifdef __APPLE__ - if (so->so_options & SO_DONTTRUNC) + if (so->so_options & SO_DONTTRUNC) { flags |= MSG_RCVMORE; - else { + } else { #endif flags |= MSG_TRUNC; if ((flags & MSG_PEEK) == 0) @@ -1932,28 +2605,51 @@ dontblock: } #endif } + + /* + * pru_rcvd below (for TCP) may cause more data to be received + * if the socket lock is dropped prior to sending the ACK; some + * legacy OpenTransport applications don't handle this well + * (if it receives less data than requested while MSG_HAVEMORE + * 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) + flags |= MSG_HAVEMORE; + if ((flags & MSG_PEEK) == 0) { - if (m == 0) + if (m == 0) { so->so_rcv.sb_mb = nextrecord; + /* + * First part is an inline SB_EMPTY_FIXUP(). Second + * part makes sure sb_lastrecord is up-to-date if + * there is still data in the socket buffer. + */ + if (so->so_rcv.sb_mb == NULL) { + so->so_rcv.sb_mbtail = NULL; + so->so_rcv.sb_lastrecord = NULL; + } else if (nextrecord->m_nextpkt == NULL) { + so->so_rcv.sb_lastrecord = nextrecord; + } + } + SBLASTRECORDCHK(&so->so_rcv, "soreceive 4"); + SBLASTMBUFCHK(&so->so_rcv, "soreceive 4"); if (pr->pr_flags & PR_WANTRCVD && so->so_pcb) (*pr->pr_usrreqs->pru_rcvd)(so, flags); } #ifdef __APPLE__ - if ((so->so_options & SO_WANTMORE) && so->so_rcv.sb_cc > 0) - flags |= MSG_HAVEMORE; - if (delayed_copy_len) { error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); if (error) - goto release; + goto release; } if (free_list) { - m_freem_list((struct mbuf *)free_list); + m_freem_list((struct mbuf *)free_list); free_list = (struct mbuf *)0; } if (need_event) - postevent(so, 0, EV_OOB); + postevent(so, 0, EV_OOB); #endif if (orig_resid == uio_resid(uio) && orig_resid && (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) { @@ -1966,40 +2662,42 @@ dontblock: release: #ifdef MORE_LOCKING_DEBUG if (so->so_usecount <= 1) - panic("soreceive: release so=%x ref=%d on socket\n", so, so->so_usecount); + panic("soreceive: release so=%p ref=%d on socket\n", + so, so->so_usecount); #endif if (delayed_copy_len) { - error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); + error = sodelayed_copy(so, uio, &free_list, &delayed_copy_len); } if (free_list) { - m_freem_list((struct mbuf *)free_list); + m_freem_list((struct mbuf *)free_list); } sbunlock(&so->so_rcv, 0); /* will unlock socket */ - // LP64todo - fix this! - KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, - so, - uio_resid(uio), - so->so_rcv.sb_cc, - 0, - error); + // LP64todo - fix this! + KERNEL_DEBUG(DBG_FNC_SORECEIVE | DBG_FUNC_END, so, uio_resid(uio), + so->so_rcv.sb_cc, 0, error); return (error); } - -static int sodelayed_copy(struct socket *so, struct uio *uio, struct mbuf **free_list, int *resid) +/* + * Returns: 0 Success + * uiomove:EFAULT + */ +static int +sodelayed_copy(struct socket *so, struct uio *uio, struct mbuf **free_list, + int *resid) { - int error = 0; + int error = 0; struct mbuf *m; m = *free_list; socket_unlock(so, 0); - while (m && error == 0) { + while (m && error == 0) { - error = uiomove(mtod(m, caddr_t), (int)m->m_len, uio); + error = uiomove(mtod(m, caddr_t), (int)m->m_len, uio); m = m->m_next; } @@ -2013,50 +2711,95 @@ static int sodelayed_copy(struct socket *so, struct uio *uio, struct mbuf **free return (error); } - + +/* + * Returns: 0 Success + * EINVAL + * ENOTCONN + * :EINVAL + * :EADDRNOTAVAIL[TCP] + * :ENOBUFS[TCP] + * :EMSGSIZE[TCP] + * :EHOSTUNREACH[TCP] + * :ENETUNREACH[TCP] + * :ENETDOWN[TCP] + * :ENOMEM[TCP] + * :EACCES[TCP] + * :EMSGSIZE[TCP] + * :ENOBUFS[TCP] + * :???[TCP] [ignorable: mostly IPSEC/firewall/DLIL] + * :??? [other protocol families] + */ +int +soshutdown(struct socket *so, int how) +{ + int error; + + switch (how) { + case SHUT_RD: + case SHUT_WR: + case SHUT_RDWR: + socket_lock(so, 1); + if ((so->so_state & + (SS_ISCONNECTED|SS_ISCONNECTING|SS_ISDISCONNECTING)) == 0) { + error = ENOTCONN; + } else { + error = soshutdownlock(so, how); + } + socket_unlock(so, 1); + break; + default: + error = EINVAL; + break; + } + + return (error); +} + int -soshutdown(so, how) - register struct socket *so; - register int how; +soshutdownlock(struct socket *so, int how) { - register struct protosw *pr = so->so_proto; - int ret; + struct protosw *pr = so->so_proto; + int error = 0; - socket_lock(so, 1); - sflt_notify(so, sock_evt_shutdown, &how); if (how != SHUT_WR) { + if ((so->so_state & SS_CANTRCVMORE) != 0) { + /* read already shut down */ + error = ENOTCONN; + goto done; + } sorflush(so); postevent(so, 0, EV_RCLOSED); } if (how != SHUT_RD) { - ret = ((*pr->pr_usrreqs->pru_shutdown)(so)); - postevent(so, 0, EV_WCLOSED); - KERNEL_DEBUG(DBG_FNC_SOSHUTDOWN | DBG_FUNC_END, 0,0,0,0,0); - socket_unlock(so, 1); - return(ret); + if ((so->so_state & SS_CANTSENDMORE) != 0) { + /* write already shut down */ + error = ENOTCONN; + goto done; + } + error = (*pr->pr_usrreqs->pru_shutdown)(so); + postevent(so, 0, EV_WCLOSED); } - - KERNEL_DEBUG(DBG_FNC_SOSHUTDOWN | DBG_FUNC_END, 0,0,0,0,0); - socket_unlock(so, 1); - return (0); +done: + KERNEL_DEBUG(DBG_FNC_SOSHUTDOWN | DBG_FUNC_END, 0, 0, 0, 0, 0); + return (error); } void -sorflush(so) - register struct socket *so; +sorflush(struct socket *so) { register struct sockbuf *sb = &so->so_rcv; register struct protosw *pr = so->so_proto; struct sockbuf asb; #ifdef MORE_LOCKING_DEBUG - lck_mtx_t * mutex_held; + 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); #endif @@ -2077,8 +2820,24 @@ sorflush(so) sb->sb_sel.si_note = asb.sb_sel.si_note; sb->sb_flags = SB_KNOTE; } - if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose) + if (asb.sb_flags & SB_DROP) + sb->sb_flags |= SB_DROP; + if (asb.sb_flags & SB_UNIX) + sb->sb_flags |= SB_UNIX; + if ((pr->pr_flags & PR_RIGHTS) && pr->pr_domain->dom_dispose) { + boolean_t unp = (pr->pr_domain->dom_dispose == unp_dispose); + /* + * Currently AF_UNIX domain uses a global domain mutex; + * unp_dispose() may end up calling soclose() on another + * AF_UNIX socket and therefore the lock must not be held + * across the call. + */ + if (unp) + socket_unlock(so, 0); (*pr->pr_domain->dom_dispose)(asb.sb_mb); + if (unp) + socket_lock(so, 0); + } sbrelease(&asb); } @@ -2088,13 +2847,13 @@ sorflush(so) * to be some kind of integer, but not a specific size. * In addition to their use here, these functions are also called by the * protocol-level pr_ctloutput() routines. + * + * Returns: 0 Success + * EINVAL + * copyin:EFAULT */ int -sooptcopyin(sopt, buf, len, minlen) - struct sockopt *sopt; - void *buf; - size_t len; - size_t minlen; +sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen) { size_t valsize; @@ -2105,7 +2864,7 @@ sooptcopyin(sopt, buf, len, minlen) * is set to however much we actually retrieved. */ if ((valsize = sopt->sopt_valsize) < minlen) - return EINVAL; + return (EINVAL); if (valsize > len) sopt->sopt_valsize = valsize = len; @@ -2113,59 +2872,133 @@ sooptcopyin(sopt, buf, len, minlen) return (copyin(sopt->sopt_val, buf, valsize)); bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), buf, valsize); - return 0; + return (0); +} + +/* + * sooptcopyin_timeval + * Copy in a timeval value into tv_p, and take into account whether the + * the calling process is 64-bit or 32-bit. Moved the sanity checking + * code here so that we can verify the 64-bit tv_sec value before we lose + * the top 32-bits assigning tv64.tv_sec to tv_p->tv_sec. + */ +static int +sooptcopyin_timeval(struct sockopt *sopt, struct timeval * tv_p) +{ + int error; + + if (proc_is64bit(sopt->sopt_p)) { + struct timeval64 tv64; + + if (sopt->sopt_valsize < sizeof(tv64)) { + return (EINVAL); + } + sopt->sopt_valsize = sizeof(tv64); + error = copyin(sopt->sopt_val, &tv64, sizeof(tv64)); + if (error != 0) { + return (error); + } + if (tv64.tv_sec < 0 || tv64.tv_sec > LONG_MAX + || 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 { + if (sopt->sopt_valsize < sizeof(*tv_p)) { + return (EINVAL); + } + sopt->sopt_valsize = sizeof(*tv_p); + if (sopt->sopt_p != 0) { + error = copyin(sopt->sopt_val, tv_p, sizeof(*tv_p)); + if (error != 0) { + return (error); + } + } else { + bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), tv_p, + sizeof(*tv_p)); + } + if (tv_p->tv_sec < 0 || tv_p->tv_sec > LONG_MAX + || tv_p->tv_usec < 0 || tv_p->tv_usec >= 1000000) { + return (EDOM); + } + } + return (0); } +/* + * Returns: 0 Success + * EINVAL + * ENOPROTOOPT + * ENOBUFS + * EDOM + * sooptcopyin:EINVAL + * sooptcopyin:EFAULT + * sooptcopyin_timeval:EINVAL + * sooptcopyin_timeval:EFAULT + * sooptcopyin_timeval:EDOM + * :EOPNOTSUPP[AF_UNIX] + * :???w + * sflt_attach_private:??? [whatever a filter author chooses] + * :??? [whatever a filter author chooses] + * + * Notes: Other returns depend on the protocol family; all + * returns depend on what the filter author causes + * their filter to return. + */ int -sosetopt(so, sopt) - struct socket *so; - struct sockopt *sopt; +sosetopt(struct socket *so, struct sockopt *sopt) { int error, optval; struct linger l; struct timeval tv; - short val; + struct socket_filter_entry *filter; + int filtered = 0; +#if CONFIG_MACF_SOCKET + struct mac extmac; +#endif /* MAC_SOCKET */ socket_lock(so, 1); + if ((so->so_state & (SS_CANTRCVMORE | SS_CANTSENDMORE)) + == (SS_CANTRCVMORE | SS_CANTSENDMORE)) { + /* the socket has been shutdown, no more sockopt's */ + error = EINVAL; + goto bad; + } if (sopt->sopt_dir != SOPT_SET) { sopt->sopt_dir = SOPT_SET; } - { - struct socket_filter_entry *filter; - int filtered = 0; - error = 0; - for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_setoption) { - if (filtered == 0) { - filtered = 1; - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter.sf_setoption( - filter->sfe_cookie, so, sopt); + error = 0; + for (filter = so->so_filt; filter && (error == 0); + filter = filter->sfe_next_onsocket) { + if (filter->sfe_filter->sf_filter.sf_setoption) { + if (filtered == 0) { + filtered = 1; + sflt_use(so); + socket_unlock(so, 0); } + error = filter->sfe_filter->sf_filter. + sf_setoption(filter->sfe_cookie, so, sopt); } - - if (filtered != 0) { - socket_lock(so, 0); - sflt_unuse(so); - - if (error) { - if (error == EJUSTRETURN) - error = 0; - goto bad; - } + } + + if (filtered != 0) { + socket_lock(so, 0); + sflt_unuse(so); + + if (error) { + if (error == EJUSTRETURN) + error = 0; + goto bad; } } error = 0; if (sopt->sopt_level != SOL_SOCKET) { if (so->so_proto && so->so_proto->pr_ctloutput) { - error = (*so->so_proto->pr_ctloutput) - (so, sopt); + error = (*so->so_proto->pr_ctloutput)(so, sopt); socket_unlock(so, 1); return (error); } @@ -2174,11 +3007,12 @@ sosetopt(so, sopt) switch (sopt->sopt_name) { case SO_LINGER: case SO_LINGER_SEC: - error = sooptcopyin(sopt, &l, sizeof l, sizeof l); + error = sooptcopyin(sopt, &l, sizeof (l), sizeof (l)); if (error) goto bad; - so->so_linger = (sopt->sopt_name == SO_LINGER) ? l.l_linger : l.l_linger * hz; + so->so_linger = (sopt->sopt_name == SO_LINGER) ? + l.l_linger : l.l_linger * hz; if (l.l_onoff) so->so_options |= SO_LINGER; else @@ -2199,8 +3033,8 @@ sosetopt(so, sopt) case SO_WANTMORE: case SO_WANTOOBFLAG: #endif - error = sooptcopyin(sopt, &optval, sizeof optval, - sizeof optval); + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); if (error) goto bad; if (optval) @@ -2213,8 +3047,8 @@ sosetopt(so, sopt) case SO_RCVBUF: case SO_SNDLOWAT: case SO_RCVLOWAT: - error = sooptcopyin(sopt, &optval, sizeof optval, - sizeof optval); + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); if (error) goto bad; @@ -2231,11 +3065,15 @@ sosetopt(so, sopt) case SO_SNDBUF: case SO_RCVBUF: if (sbreserve(sopt->sopt_name == SO_SNDBUF ? - &so->so_snd : &so->so_rcv, - (u_long) optval) == 0) { + &so->so_snd : &so->so_rcv, + (u_long) optval) == 0) { error = ENOBUFS; goto bad; } + if (sopt->sopt_name == SO_SNDBUF) + so->so_snd.sb_flags |= SB_USRSIZE; + else + so->so_rcv.sb_flags |= SB_USRSIZE; break; /* @@ -2257,17 +3095,10 @@ sosetopt(so, sopt) case SO_SNDTIMEO: case SO_RCVTIMEO: - error = sooptcopyin(sopt, &tv, sizeof tv, - sizeof tv); + error = sooptcopyin_timeval(sopt, &tv); if (error) goto bad; - if (tv.tv_sec < 0 || tv.tv_sec > LONG_MAX || - tv.tv_usec < 0 || tv.tv_usec >= 1000000) { - error = EDOM; - goto bad; - } - switch (sopt->sopt_name) { case SO_SNDTIMEO: so->so_snd.sb_timeo = tv; @@ -2282,46 +3113,111 @@ sosetopt(so, sopt) { struct so_nke nke; - error = sooptcopyin(sopt, &nke, - sizeof nke, sizeof nke); + error = sooptcopyin(sopt, &nke, sizeof (nke), + sizeof (nke)); if (error) - goto bad; + goto bad; - error = sflt_attach_private(so, NULL, nke.nke_handle, 1); + error = sflt_attach_private(so, NULL, + nke.nke_handle, 1); break; } case SO_NOSIGPIPE: - error = sooptcopyin(sopt, &optval, sizeof optval, - sizeof optval); - if (error) - goto bad; - if (optval) - so->so_flags |= SOF_NOSIGPIPE; - else - so->so_flags &= ~SOF_NOSIGPIPE; - + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); + if (error) + goto bad; + if (optval) + so->so_flags |= SOF_NOSIGPIPE; + else + so->so_flags &= ~SOF_NOSIGPIPE; + break; case SO_NOADDRERR: - error = sooptcopyin(sopt, &optval, sizeof optval, - sizeof optval); - if (error) - goto bad; - if (optval) - so->so_flags |= SOF_NOADDRAVAIL; - else - so->so_flags &= ~SOF_NOADDRAVAIL; - + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); + if (error) + goto bad; + if (optval) + so->so_flags |= SOF_NOADDRAVAIL; + else + so->so_flags &= ~SOF_NOADDRAVAIL; + break; + case SO_REUSESHAREUID: + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); + if (error) + goto bad; + if (optval) + so->so_flags |= SOF_REUSESHAREUID; + else + so->so_flags &= ~SOF_REUSESHAREUID; + break; +#ifdef __APPLE_API_PRIVATE + case SO_NOTIFYCONFLICT: + if (kauth_cred_issuser(kauth_cred_get()) == 0) { + error = EPERM; + goto bad; + } + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); + if (error) + goto bad; + if (optval) + so->so_flags |= SOF_NOTIFYCONFLICT; + else + so->so_flags &= ~SOF_NOTIFYCONFLICT; + break; +#endif + case SO_RESTRICTIONS: + if (kauth_cred_issuser(kauth_cred_get()) == 0) { + error = EPERM; + goto bad; + } + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); + if (error) + goto bad; + so->so_restrictions = (optval & (SO_RESTRICT_DENYIN | + SO_RESTRICT_DENYOUT | SO_RESTRICT_DENYSET)); + break; + + case SO_LABEL: +#if CONFIG_MACF_SOCKET + if ((error = sooptcopyin(sopt, &extmac, sizeof (extmac), + sizeof (extmac))) != 0) + goto bad; + + error = mac_setsockopt_label(proc_ucred(sopt->sopt_p), + so, &extmac); +#else + error = EOPNOTSUPP; +#endif /* MAC_SOCKET */ + break; + +#ifdef __APPLE_API_PRIVATE + case SO_UPCALLCLOSEWAIT: + error = sooptcopyin(sopt, &optval, sizeof (optval), + sizeof (optval)); + if (error) + goto bad; + if (optval) + so->so_flags |= SOF_UPCALLCLOSEWAIT; + else + so->so_flags &= ~SOF_UPCALLCLOSEWAIT; + break; +#endif + default: error = ENOPROTOOPT; break; } if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) { - (void) ((*so->so_proto->pr_ctloutput) - (so, sopt)); + (void) ((*so->so_proto->pr_ctloutput)(so, sopt)); } } bad: @@ -2329,12 +3225,9 @@ bad: return (error); } -/* Helper routine for getsockopt */ +/* Helper routines for getsockopt */ int -sooptcopyout(sopt, buf, len) - struct sockopt *sopt; - void *buf; - size_t len; +sooptcopyout(struct sockopt *sopt, void *buf, size_t len) { int error; size_t valsize; @@ -2358,58 +3251,93 @@ sooptcopyout(sopt, buf, len) 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 timeval64 tv64; + const void * val; + size_t valsize; + + error = 0; + if (proc_is64bit(sopt->sopt_p)) { + len = sizeof(struct timeval64); + tv64.tv_sec = tv_p->tv_sec; + tv64.tv_usec = tv_p->tv_usec; + val = &tv64; + } else { + len = sizeof(struct timeval); + val = tv_p; + } + valsize = min(len, sopt->sopt_valsize); + sopt->sopt_valsize = valsize; + if (sopt->sopt_val != USER_ADDR_NULL) { + if (sopt->sopt_p != 0) + error = copyout(val, sopt->sopt_val, valsize); + else + bcopy(val, CAST_DOWN(caddr_t, sopt->sopt_val), valsize); + } + return (error); } +/* + * Return: 0 Success + * ENOPROTOOPT + * :EOPNOTSUPP[AF_UNIX] + * :??? + * :??? + */ int -sogetopt(so, sopt) - struct socket *so; - struct sockopt *sopt; +sogetopt(struct socket *so, struct sockopt *sopt) { int error, optval; struct linger l; struct timeval tv; + struct socket_filter_entry *filter; + int filtered = 0; +#if CONFIG_MACF_SOCKET + struct mac extmac; +#endif /* MAC_SOCKET */ - if (sopt->sopt_dir != SOPT_GET) { - sopt->sopt_dir = SOPT_GET; - } + if (sopt->sopt_dir != SOPT_GET) { + sopt->sopt_dir = SOPT_GET; + } socket_lock(so, 1); - - { - struct socket_filter_entry *filter; - int filtered = 0; - error = 0; - for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_getoption) { - if (filtered == 0) { - filtered = 1; - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter.sf_getoption( - filter->sfe_cookie, so, sopt); + + error = 0; + for (filter = so->so_filt; filter && (error == 0); + filter = filter->sfe_next_onsocket) { + if (filter->sfe_filter->sf_filter.sf_getoption) { + if (filtered == 0) { + filtered = 1; + sflt_use(so); + socket_unlock(so, 0); } + error = filter->sfe_filter->sf_filter. + sf_getoption(filter->sfe_cookie, so, sopt); } - if (filtered != 0) { - socket_lock(so, 0); - sflt_unuse(so); - - if (error) { - if (error == EJUSTRETURN) - error = 0; - socket_unlock(so, 1); - return error; - } + } + if (filtered != 0) { + socket_lock(so, 0); + sflt_unuse(so); + + if (error) { + if (error == EJUSTRETURN) + error = 0; + socket_unlock(so, 1); + return (error); } } error = 0; if (sopt->sopt_level != SOL_SOCKET) { if (so->so_proto && so->so_proto->pr_ctloutput) { - error = (*so->so_proto->pr_ctloutput) - (so, sopt); + error = (*so->so_proto->pr_ctloutput)(so, sopt); socket_unlock(so, 1); return (error); } else { @@ -2421,9 +3349,9 @@ sogetopt(so, sopt) case SO_LINGER: case SO_LINGER_SEC: l.l_onoff = so->so_options & SO_LINGER; - l.l_linger = (sopt->sopt_name == SO_LINGER) ? so->so_linger : - so->so_linger / hz; - error = sooptcopyout(sopt, &l, sizeof l); + l.l_linger = (sopt->sopt_name == SO_LINGER) ? + so->so_linger : so->so_linger / hz; + error = sooptcopyout(sopt, &l, sizeof (l)); break; case SO_USELOOPBACK: @@ -2442,7 +3370,7 @@ sogetopt(so, sopt) #endif optval = so->so_options & sopt->sopt_name; integer: - error = sooptcopyout(sopt, &optval, sizeof optval); + error = sooptcopyout(sopt, &optval, sizeof (optval)); break; case SO_TYPE: @@ -2451,27 +3379,27 @@ integer: #ifdef __APPLE__ case SO_NREAD: - { - int pkt_total; - struct mbuf *m1; + if (so->so_proto->pr_flags & PR_ATOMIC) { + int pkt_total; + struct mbuf *m1; - pkt_total = 0; - m1 = so->so_rcv.sb_mb; - if (so->so_proto->pr_flags & PR_ATOMIC) - { + pkt_total = 0; + m1 = so->so_rcv.sb_mb; while (m1) { - if (m1->m_type == MT_DATA) + if (m1->m_type == MT_DATA || m1->m_type == MT_HEADER || + m1->m_type == MT_OOBDATA) pkt_total += m1->m_len; m1 = m1->m_next; } optval = pkt_total; - } else - optval = so->so_rcv.sb_cc; + } else { + optval = so->so_rcv.sb_cc - so->so_rcv.sb_ctl; + } goto integer; - } + case SO_NWRITE: optval = so->so_snd.sb_cc; - goto integer; + goto integer; #endif case SO_ERROR: optval = so->so_error; @@ -2497,10 +3425,10 @@ integer: case SO_SNDTIMEO: case SO_RCVTIMEO: tv = (sopt->sopt_name == SO_SNDTIMEO ? - so->so_snd.sb_timeo : so->so_rcv.sb_timeo); + so->so_snd.sb_timeo : so->so_rcv.sb_timeo); - error = sooptcopyout(sopt, &tv, sizeof tv); - break; + error = sooptcopyout_timeval(sopt, &tv); + break; case SO_NOSIGPIPE: optval = (so->so_flags & SOF_NOSIGPIPE); @@ -2510,6 +3438,54 @@ integer: optval = (so->so_flags & SOF_NOADDRAVAIL); goto integer; + case SO_REUSESHAREUID: + optval = (so->so_flags & SOF_REUSESHAREUID); + goto integer; + +#ifdef __APPLE_API_PRIVATE + case SO_NOTIFYCONFLICT: + optval = (so->so_flags & SOF_NOTIFYCONFLICT); + goto integer; +#endif + case SO_RESTRICTIONS: + optval = so->so_restrictions & (SO_RESTRICT_DENYIN | + SO_RESTRICT_DENYOUT | SO_RESTRICT_DENYSET); + goto integer; + + 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; + + error = sooptcopyout(sopt, &extmac, sizeof (extmac)); +#else + 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 + case SO_UPCALLCLOSEWAIT: + optval = (so->so_flags & SOF_UPCALLCLOSEWAIT); + goto integer; +#endif + default: error = ENOPROTOOPT; break; @@ -2527,16 +3503,16 @@ soopt_getm(struct sockopt *sopt, struct mbuf **mp) int sopt_size = sopt->sopt_valsize; if (sopt_size > MAX_SOOPTGETM_SIZE) - return EMSGSIZE; + return (EMSGSIZE); MGET(m, sopt->sopt_p ? M_WAIT : M_DONTWAIT, MT_DATA); if (m == 0) - return ENOBUFS; + return (ENOBUFS); if (sopt_size > MLEN) { MCLGET(m, sopt->sopt_p ? M_WAIT : M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_free(m); - return ENOBUFS; + return (ENOBUFS); } m->m_len = min(MCLBYTES, sopt_size); } else { @@ -2550,13 +3526,13 @@ soopt_getm(struct sockopt *sopt, struct mbuf **mp) MGET(m, sopt->sopt_p ? M_WAIT : M_DONTWAIT, MT_DATA); if (m == 0) { m_freem(*mp); - return ENOBUFS; + return (ENOBUFS); } if (sopt_size > MLEN) { MCLGET(m, sopt->sopt_p ? M_WAIT : M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(*mp); - return ENOBUFS; + return (ENOBUFS); } m->m_len = min(MCLBYTES, sopt_size); } else { @@ -2566,7 +3542,7 @@ soopt_getm(struct sockopt *sopt, struct mbuf **mp) m_prev->m_next = m; m_prev = m; } - return 0; + return (0); } /* XXX; copyin sopt data into mbuf chain for (__FreeBSD__ < 3) routines. */ @@ -2576,25 +3552,28 @@ soopt_mcopyin(struct sockopt *sopt, struct mbuf *m) struct mbuf *m0 = m; if (sopt->sopt_val == USER_ADDR_NULL) - return 0; + return (0); while (m != NULL && sopt->sopt_valsize >= m->m_len) { if (sopt->sopt_p != NULL) { int error; - error = copyin(sopt->sopt_val, mtod(m, char *), m->m_len); + error = copyin(sopt->sopt_val, mtod(m, char *), + m->m_len); if (error != 0) { m_freem(m0); - return(error); + return (error); } - } else - bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), mtod(m, char *), m->m_len); + } else { + bcopy(CAST_DOWN(caddr_t, sopt->sopt_val), + mtod(m, char *), m->m_len); + } sopt->sopt_valsize -= m->m_len; - sopt->sopt_val += m->m_len; + sopt->sopt_val += m->m_len; m = m->m_next; } if (m != NULL) /* should be allocated enoughly at ip6_sooptmcopyin() */ panic("soopt_mcopyin"); - return 0; + return (0); } /* XXX; copyout mbuf chain data into soopt for (__FreeBSD__ < 3) routines. */ @@ -2605,42 +3584,43 @@ soopt_mcopyout(struct sockopt *sopt, struct mbuf *m) size_t valsize = 0; if (sopt->sopt_val == USER_ADDR_NULL) - return 0; + return (0); while (m != NULL && sopt->sopt_valsize >= m->m_len) { if (sopt->sopt_p != NULL) { int error; - error = copyout(mtod(m, char *), sopt->sopt_val, m->m_len); + error = copyout(mtod(m, char *), sopt->sopt_val, + m->m_len); if (error != 0) { m_freem(m0); - return(error); + return (error); } - } else - bcopy(mtod(m, char *), CAST_DOWN(caddr_t, sopt->sopt_val), m->m_len); - sopt->sopt_valsize -= m->m_len; - sopt->sopt_val += m->m_len; - valsize += m->m_len; - m = m->m_next; + } else { + bcopy(mtod(m, char *), + CAST_DOWN(caddr_t, sopt->sopt_val), m->m_len); + } + sopt->sopt_valsize -= m->m_len; + sopt->sopt_val += m->m_len; + valsize += m->m_len; + m = m->m_next; } 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(so) - register struct socket *so; +sohasoutofband(struct socket *so) { - struct proc *p; if (so->so_pgid < 0) gsignal(-so->so_pgid, SIGURG); - else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0) - psignal(p, SIGURG); + else if (so->so_pgid > 0) + proc_signal(so->so_pgid, SIGURG); selwakeup(&so->so_rcv.sb_sel); } @@ -2666,13 +3646,19 @@ sopoll(struct socket *so, int events, __unused kauth_cred_t cred, void * wql) if (revents == 0) { if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { - /* Darwin sets the flag first, BSD calls selrecord first */ + /* + * Darwin sets the flag first, + * BSD calls selrecord first + */ so->so_rcv.sb_flags |= SB_SEL; selrecord(p, &so->so_rcv.sb_sel, wql); } if (events & (POLLOUT | POLLWRNORM)) { - /* Darwin sets the flag first, BSD calls selrecord first */ + /* + * Darwin sets the flag first, + * BSD calls selrecord first + */ so->so_snd.sb_flags |= SB_SEL; selrecord(p, &so->so_snd.sb_sel, wql); } @@ -2682,15 +3668,22 @@ sopoll(struct socket *so, int events, __unused kauth_cred_t cred, void * wql) return (revents); } -int soo_kqfilter(struct fileproc *fp, struct knote *kn, struct proc *p); - int -soo_kqfilter(__unused struct fileproc *fp, struct knote *kn, __unused struct proc *p) +soo_kqfilter(__unused struct fileproc *fp, struct knote *kn, + __unused struct proc *p) { struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; struct sockbuf *sb; + socket_lock(so, 1); +#if CONFIG_MACF_SOCKET + if (mac_socket_check_kqfilter(proc_ucred(p), kn, so) != 0) { + socket_unlock(so, 1); + return (1); + } +#endif /* MAC_SOCKET */ + switch (kn->kn_filter) { case EVFILT_READ: if (so->so_options & SO_ACCEPTCONN) @@ -2735,9 +3728,11 @@ filt_soread(struct knote *kn, long hint) if ((hint & SO_FILT_HINT_LOCKED) == 0) socket_lock(so, 1); + 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_rcv.sb_cc - so->so_oobmark; + kn->kn_data -= so->so_oobmark; if ((hint & SO_FILT_HINT_LOCKED) == 0) socket_unlock(so, 1); return (1); @@ -2745,7 +3740,6 @@ filt_soread(struct knote *kn, long hint) kn->kn_data = so->so_oobmark; kn->kn_flags |= EV_OOBAND; } else { - kn->kn_data = so->so_rcv.sb_cc; if (so->so_state & SS_CANTRCVMORE) { kn->kn_flags |= EV_EOF; kn->kn_fflags = so->so_error; @@ -2778,9 +3772,9 @@ filt_soread(struct knote *kn, long hint) if ((hint & SO_FILT_HINT_LOCKED) == 0) socket_unlock(so, 1); - return( kn->kn_flags & EV_OOBAND || - kn->kn_data >= ((kn->kn_sfflags & NOTE_LOWAT) ? - kn->kn_sdata : so->so_rcv.sb_lowat)); + return ((kn->kn_flags & EV_OOBAND) || + kn->kn_data >= ((kn->kn_sfflags & NOTE_LOWAT) ? + kn->kn_sdata : so->so_rcv.sb_lowat)); } static void @@ -2789,7 +3783,7 @@ filt_sowdetach(struct knote *kn) struct socket *so = (struct socket *)kn->kn_fp->f_fglob->fg_data; socket_lock(so, 1); - if(so->so_snd.sb_flags & SB_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); @@ -2806,7 +3800,7 @@ filt_sowrite(struct knote *kn, long hint) kn->kn_data = sbspace(&so->so_snd); if (so->so_state & SS_CANTSENDMORE) { - kn->kn_flags |= EV_EOF; + kn->kn_flags |= EV_EOF; kn->kn_fflags = so->so_error; if ((hint & SO_FILT_HINT_LOCKED) == 0) socket_unlock(so, 1); @@ -2848,106 +3842,104 @@ filt_solisten(struct knote *kn, long hint) int -socket_lock(so, refcount) - struct socket *so; - int refcount; +socket_lock(struct socket *so, int refcount) { - int error = 0, lr, lr_saved; -#ifdef __ppc__ - __asm__ volatile("mflr %0" : "=r" (lr)); - lr_saved = lr; -#endif + int error = 0, lr_saved; + + lr_saved = (unsigned int) __builtin_return_address(0); if (so->so_proto->pr_lock) { error = (*so->so_proto->pr_lock)(so, refcount, lr_saved); - } - else { + } else { #ifdef MORE_LOCKING_DEBUG - lck_mtx_assert(so->so_proto->pr_domain->dom_mtx, LCK_MTX_ASSERT_NOTOWNED); + 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) so->so_usecount++; - so->reserved3 = (void*)lr_saved; /* save caller for refcount going to zero */ + so->lock_lr[so->next_lock_lr] = (u_int32_t)lr_saved; + so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX; } - return(error); - + return (error); } int -socket_unlock(so, refcount) - struct socket *so; - int refcount; +socket_unlock(struct socket *so, int refcount) { - int error = 0, lr, lr_saved; - lck_mtx_t * mutex_held; - -#ifdef __ppc__ -__asm__ volatile("mflr %0" : "=r" (lr)); - lr_saved = lr; -#endif - + int error = 0, lr_saved; + lck_mtx_t *mutex_held; + lr_saved = (unsigned int) __builtin_return_address(0); if (so->so_proto == NULL) - panic("socket_unlock null so_proto so=%x\n", so); + panic("socket_unlock null so_proto so=%p\n", so); - if (so && so->so_proto->pr_unlock) + if (so && so->so_proto->pr_unlock) { error = (*so->so_proto->pr_unlock)(so, refcount, lr_saved); - else { + } else { mutex_held = so->so_proto->pr_domain->dom_mtx; #ifdef MORE_LOCKING_DEBUG lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); #endif + so->unlock_lr[so->next_unlock_lr] = (u_int32_t)lr_saved; + so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX; + if (refcount) { if (so->so_usecount <= 0) - panic("socket_unlock: bad refcount so=%x value=%d\n", so, so->so_usecount); + panic("socket_unlock: bad refcount so=%p " + "value=%d\n", so, so->so_usecount); so->so_usecount--; if (so->so_usecount == 0) { sofreelastref(so, 1); } - else - so->reserved4 = (void*)lr_saved; /* save caller */ } lck_mtx_unlock(mutex_held); } - return(error); + return (error); } -//### Called with socket locked, will unlock socket + +/* Called with socket locked, will unlock socket */ void -sofree(so) - struct socket *so; +sofree(struct socket *so) { - int lr, lr_saved; - lck_mtx_t * mutex_held; -#ifdef __ppc__ - __asm__ volatile("mflr %0" : "=r" (lr)); - lr_saved = lr; -#endif - if (so->so_proto->pr_getlock != NULL) + lck_mtx_t *mutex_held; + 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); - + sofreelastref(so, 0); } void -soreference(so) - struct socket *so; +soreference(struct socket *so) { socket_lock(so, 1); /* locks & take one reference on socket */ socket_unlock(so, 0); /* unlock only */ } void -sodereference(so) - struct socket *so; +sodereference(struct socket *so) { socket_lock(so, 0); socket_unlock(so, 1); } + +/* + * Set or clear SOF_MULTIPAGES on the socket to enable or disable the + * possibility of using jumbo clusters. Caller must ensure to hold + * the socket lock. + */ +void +somultipages(struct socket *so, boolean_t set) +{ + if (set) + so->so_flags |= SOF_MULTIPAGES; + else + so->so_flags &= ~SOF_MULTIPAGES; +}