X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/d1ecb069dfe24481e4a83f44cb5217a2b06746d7..d190cdc3f5544636abb56dc1874be391d3e1b148:/bsd/kern/uipc_syscalls.c diff --git a/bsd/kern/uipc_syscalls.c b/bsd/kern/uipc_syscalls.c index 3c0aec400..603f8b34d 100644 --- a/bsd/kern/uipc_syscalls.c +++ b/bsd/kern/uipc_syscalls.c @@ -1,8 +1,8 @@ /* - * Copyright (c) 2000-2007 Apple Inc. All rights reserved. + * Copyright (c) 2000-2015 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ - * + * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in @@ -11,10 +11,10 @@ * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. - * + * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. - * + * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, @@ -22,7 +22,7 @@ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. - * + * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* @@ -76,8 +76,9 @@ #include #include #include +#include #include -#include +#include #include #include #include @@ -86,6 +87,9 @@ #include #include #include +#include +#include +#include #include @@ -100,14 +104,13 @@ #endif /* MAC_SOCKET_SUBSET */ #define f_flag f_fglob->fg_flag -#define f_type f_fglob->fg_type +#define f_type f_fglob->fg_ops->fo_type #define f_msgcount f_fglob->fg_msgcount #define f_cred f_fglob->fg_cred #define f_ops f_fglob->fg_ops #define f_offset f_fglob->fg_offset #define f_data f_fglob->fg_data - #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) @@ -122,34 +125,73 @@ #define DBG_FNC_SENDFILE_WAIT NETDBG_CODE(DBG_NETSOCK, ((10 << 8) | 1)) #define DBG_FNC_SENDFILE_READ NETDBG_CODE(DBG_NETSOCK, ((10 << 8) | 2)) #define DBG_FNC_SENDFILE_SEND NETDBG_CODE(DBG_NETSOCK, ((10 << 8) | 3)) +#define DBG_FNC_SENDMSG_X NETDBG_CODE(DBG_NETSOCK, (11 << 8)) +#define DBG_FNC_RECVMSG_X NETDBG_CODE(DBG_NETSOCK, (12 << 8)) - -#define HACK_FOR_4056224 1 -#if HACK_FOR_4056224 -static pid_t last_pid_4056224 = 0; -#endif /* HACK_FOR_4056224 */ +#if DEBUG || DEVELOPMENT +#define DEBUG_KERNEL_ADDRPERM(_v) (_v) +#define DBG_PRINTF(...) printf(__VA_ARGS__) +#else +#define DEBUG_KERNEL_ADDRPERM(_v) VM_KERNEL_ADDRPERM(_v) +#define DBG_PRINTF(...) do { } while (0) +#endif /* TODO: should be in header file */ int falloc_locked(proc_t, struct fileproc **, int *, vfs_context_t, int); -static int sendit(struct proc *, int, struct user_msghdr *, uio_t, int, - int32_t *); +static int sendit(struct proc *, struct socket *, struct user_msghdr *, uio_t, + int, int32_t *); static int recvit(struct proc *, int, struct user_msghdr *, uio_t, user_addr_t, int32_t *); +static int connectit(struct socket *, struct sockaddr *); static int getsockaddr(struct socket *, struct sockaddr **, user_addr_t, size_t, boolean_t); static int getsockaddr_s(struct socket *, struct sockaddr_storage *, user_addr_t, size_t, boolean_t); +static int getsockaddrlist(struct socket *, struct sockaddr_list **, + user_addr_t, socklen_t, boolean_t); #if SENDFILE static void alloc_sendpkt(int, size_t, unsigned int *, struct mbuf **, boolean_t); #endif /* SENDFILE */ +static int connectx_nocancel(struct proc *, struct connectx_args *, int *); +static int connectitx(struct socket *, struct sockaddr_list **, + struct sockaddr_list **, struct proc *, uint32_t, sae_associd_t, + sae_connid_t *, uio_t, unsigned int, user_ssize_t *); +static int peeloff_nocancel(struct proc *, struct peeloff_args *, int *); +static int disconnectx_nocancel(struct proc *, struct disconnectx_args *, + int *); +static int socket_common(struct proc *, int, int, int, pid_t, int32_t *, int); + +static int internalize_user_msghdr_array(const void *, int, int, u_int, + struct user_msghdr_x *, struct uio **); +static u_int externalize_user_msghdr_array(void *, int, int, u_int, + const struct user_msghdr_x *, struct uio **); + +static void free_uio_array(struct uio **, u_int); +static int uio_array_is_valid(struct uio **, u_int); +static int recv_msg_array_is_valid(struct recv_msg_elem *, u_int); +static int internalize_recv_msghdr_array(const void *, int, int, + u_int, struct user_msghdr_x *, struct recv_msg_elem *); +static u_int externalize_recv_msghdr_array(void *, int, int, u_int, + const struct user_msghdr_x *, struct recv_msg_elem *); +static struct recv_msg_elem *alloc_recv_msg_array(u_int count); +static void free_recv_msg_array(struct recv_msg_elem *, u_int); + +SYSCTL_DECL(_kern_ipc); + +static u_int somaxsendmsgx = 100; +SYSCTL_UINT(_kern_ipc, OID_AUTO, maxsendmsgx, + CTLFLAG_RW | CTLFLAG_LOCKED, &somaxsendmsgx, 0, ""); +static u_int somaxrecvmsgx = 100; +SYSCTL_UINT(_kern_ipc, OID_AUTO, maxrecvmsgx, + CTLFLAG_RW | CTLFLAG_LOCKED, &somaxrecvmsgx, 0, ""); /* * System call interface to the socket abstraction. */ -extern struct fileops socketops; +extern const struct fileops socketops; /* * Returns: 0 Success @@ -162,32 +204,65 @@ extern struct fileops socketops; * socreate:EPROTONOSUPPORT * socreate:ENOBUFS * socreate:ENOMEM - * socreate:EISCONN * socreate:??? [other protocol families, IPSEC] */ int -socket(struct proc *p, struct socket_args *uap, int32_t *retval) +socket(struct proc *p, + struct socket_args *uap, + int32_t *retval) +{ + return (socket_common(p, uap->domain, uap->type, uap->protocol, + proc_selfpid(), retval, 0)); +} + +int +socket_delegate(struct proc *p, + struct socket_delegate_args *uap, + int32_t *retval) +{ + return socket_common(p, uap->domain, uap->type, uap->protocol, + uap->epid, retval, 1); +} + +static int +socket_common(struct proc *p, + int domain, + int type, + int protocol, + pid_t epid, + int32_t *retval, + int delegate) { struct socket *so; struct fileproc *fp; int fd, error; - AUDIT_ARG(socket, uap->domain, uap->type, uap->protocol); + AUDIT_ARG(socket, domain, type, protocol); #if CONFIG_MACF_SOCKET_SUBSET - if ((error = mac_socket_check_create(kauth_cred_get(), uap->domain, - uap->type, uap->protocol)) != 0) + if ((error = mac_socket_check_create(kauth_cred_get(), domain, + type, protocol)) != 0) return (error); #endif /* MAC_SOCKET_SUBSET */ + if (delegate) { + error = priv_check_cred(kauth_cred_get(), + PRIV_NET_PRIVILEGED_SOCKET_DELEGATE, 0); + if (error) + return (EACCES); + } + error = falloc(p, &fp, &fd, vfs_context_current()); if (error) { return (error); } fp->f_flag = FREAD|FWRITE; - fp->f_type = DTYPE_SOCKET; fp->f_ops = &socketops; - error = socreate(uap->domain, &so, uap->type, uap->protocol); + if (delegate) + error = socreate_delegate(domain, &so, type, protocol, epid); + else + error = socreate(domain, &so, type, protocol); + if (error) { fp_free(p, fd, fp); } else { @@ -200,6 +275,10 @@ socket(struct proc *p, struct socket_args *uap, int32_t *retval) proc_fdunlock(p); *retval = fd; + if (ENTR_SHOULDTRACE) { + KERNEL_ENERGYTRACE(kEnTrActKernSocket, DBG_FUNC_START, + fd, 0, (int64_t)VM_KERNEL_ADDRPERM(so)); + } } return (error); } @@ -215,7 +294,7 @@ socket(struct proc *p, struct socket_args *uap, int32_t *retval) * getsockaddr:EINVAL Invalid argument * getsockaddr:ENOMEM Not enough space * getsockaddr:EFAULT Bad address - * sobind:??? + * sobindlock:??? */ /* ARGSUSED */ int @@ -253,9 +332,9 @@ bind(__unused proc_t p, struct bind_args *uap, __unused int32_t *retval) AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), sa); #if CONFIG_MACF_SOCKET_SUBSET if ((error = mac_socket_check_bind(kauth_cred_get(), so, sa)) == 0) - error = sobind(so, sa); + error = sobindlock(so, sa, 1); /* will lock socket */ #else - error = sobind(so, sa); + error = sobindlock(so, sa, 1); /* will lock socket */ #endif /* MAC_SOCKET_SUBSET */ if (want_free) FREE(sa, M_SONAME); @@ -412,7 +491,6 @@ accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, goto out; } - /* * At this point we know that there is at least one connection * ready to be accepted. Remove it from the queue prior to @@ -423,6 +501,8 @@ accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); so = TAILQ_FIRST(&head->so_comp); TAILQ_REMOVE(&head->so_comp, so, so_list); + so->so_head = NULL; + so->so_state &= ~SS_COMP; head->so_qlen--; /* unlock head to avoid deadlock with select, keep a ref on head */ socket_unlock(head, 0); @@ -435,8 +515,9 @@ accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, * the file descriptor should the MAC check fails. */ if ((error = mac_socket_check_accepted(kauth_cred_get(), so)) != 0) { - so->so_state &= ~(SS_NOFDREF | SS_COMP); - so->so_head = NULL; + socket_lock(so, 1); + so->so_state &= ~SS_NOFDREF; + socket_unlock(so, 1); soclose(so); /* Drop reference on listening socket */ sodereference(head); @@ -448,7 +529,7 @@ accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, * Pass the pre-accepted socket to any interested socket filter(s). * Upon failure, the socket would have been closed by the callee. */ - if (so->so_filt != NULL && (error = soacceptfilter(so)) != 0) { + if (so->so_filt != NULL && (error = soacceptfilter(so, head)) != 0) { /* Drop reference on listening socket */ sodereference(head); /* Propagate socket filter's error code to the caller */ @@ -459,28 +540,45 @@ accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, error = falloc(p, &fp, &newfd, vfs_context_current()); if (error) { /* - * Probably ran out of file descriptors. Put the - * unaccepted connection back onto the queue and - * do another wakeup so some other process might - * have a chance at it. + * Probably ran out of file descriptors. + * + * + * Don't put this back on the socket like we used to, that + * just causes the client to spin. Drop the socket. */ - socket_lock(head, 0); - TAILQ_INSERT_HEAD(&head->so_comp, so, so_list); - head->so_qlen++; - wakeup_one((caddr_t)&head->so_timeo); - socket_unlock(head, 1); + socket_lock(so, 1); + so->so_state &= ~SS_NOFDREF; + socket_unlock(so, 1); + soclose(so); + sodereference(head); goto out; } *retval = newfd; - fp->f_type = DTYPE_SOCKET; fp->f_flag = fflag; fp->f_ops = &socketops; fp->f_data = (caddr_t)so; + socket_lock(head, 0); if (dosocklock) socket_lock(so, 1); - so->so_state &= ~SS_COMP; - so->so_head = NULL; + + /* Sync socket non-blocking/async state with file flags */ + if (fp->f_flag & FNONBLOCK) { + so->so_state |= SS_NBIO; + } else { + so->so_state &= ~SS_NBIO; + } + + if (fp->f_flag & FASYNC) { + so->so_state |= SS_ASYNC; + so->so_rcv.sb_flags |= SB_ASYNC; + so->so_snd.sb_flags |= SB_ASYNC; + } else { + so->so_state &= ~SS_ASYNC; + so->so_rcv.sb_flags &= ~SB_ASYNC; + so->so_snd.sb_flags &= ~SB_ASYNC; + } + (void) soacceptlock(so, &sa, 0); socket_unlock(head, 1); if (sa == NULL) { @@ -510,16 +608,12 @@ gotnoname: releasefd: /* - * If the socket has been marked as inactive by soacceptfilter(), - * disallow further operations on it. We explicitly call shutdown - * on both data directions to ensure that SS_CANT{RCV,SEND}MORE - * states are set for the socket. This would also flush out data - * hanging off the receive list of this socket. + * If the socket has been marked as inactive by sosetdefunct(), + * disallow further operations on it. */ if (so->so_flags & SOF_DEFUNCT) { - (void) soshutdownlock(so, SHUT_RD); - (void) soshutdownlock(so, SHUT_WR); - (void) sodisconnectlocked(so); + sodefunct(current_proc(), so, + SHUTDOWN_SOCKET_LEVEL_DISCONNECT_INTERNAL); } if (dosocklock) @@ -532,6 +626,11 @@ releasefd: out: file_drop(fd); + + if (error == 0 && ENTR_SHOULDTRACE) { + KERNEL_ENERGYTRACE(kEnTrActKernSocket, DBG_FUNC_START, + newfd, 0, (int64_t)VM_KERNEL_ADDRPERM(so)); + } return (error); } @@ -539,7 +638,8 @@ int accept(struct proc *p, struct accept_args *uap, int32_t *retval) { __pthread_testcancel(1); - return(accept_nocancel(p, (struct accept_nocancel_args *)uap, retval)); + return (accept_nocancel(p, (struct accept_nocancel_args *)uap, + retval)); } /* @@ -569,17 +669,17 @@ int connect(struct proc *p, struct connect_args *uap, int32_t *retval) { __pthread_testcancel(1); - return(connect_nocancel(p, (struct connect_nocancel_args *)uap, retval)); + return (connect_nocancel(p, (struct connect_nocancel_args *)uap, + retval)); } int -connect_nocancel(__unused proc_t p, struct connect_nocancel_args *uap, __unused int32_t *retval) +connect_nocancel(proc_t p, struct connect_nocancel_args *uap, int32_t *retval) { +#pragma unused(p, retval) struct socket *so; struct sockaddr_storage ss; struct sockaddr *sa = NULL; - lck_mtx_t *mutex_held; - boolean_t want_free = TRUE; int error; int fd = uap->s; boolean_t dgram; @@ -604,146 +704,522 @@ connect_nocancel(__unused proc_t p, struct connect_nocancel_args *uap, __unused error = getsockaddr(so, &sa, uap->name, uap->namelen, !dgram); } else { error = getsockaddr_s(so, &ss, uap->name, uap->namelen, !dgram); - if (error == 0) { + if (error == 0) sa = (struct sockaddr *)&ss; - want_free = FALSE; - } } if (error != 0) goto out; - AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), sa); -#if CONFIG_MACF_SOCKET_SUBSET - if ((error = mac_socket_check_connect(kauth_cred_get(), so, sa)) != 0) { - if (want_free) - FREE(sa, M_SONAME); + error = connectit(so, sa); + + if (sa != NULL && sa != SA(&ss)) + FREE(sa, M_SONAME); + if (error == ERESTART) + error = EINTR; +out: + file_drop(fd); + return (error); +} + +static int +connectx_nocancel(struct proc *p, struct connectx_args *uap, int *retval) +{ +#pragma unused(p, retval) + struct sockaddr_list *src_sl = NULL, *dst_sl = NULL; + struct socket *so; + int error, error1, fd = uap->socket; + boolean_t dgram; + sae_connid_t cid = SAE_CONNID_ANY; + struct user32_sa_endpoints ep32; + struct user64_sa_endpoints ep64; + struct user_sa_endpoints ep; + user_ssize_t bytes_written = 0; + struct user_iovec *iovp; + uio_t auio = NULL; + + AUDIT_ARG(fd, uap->socket); + error = file_socket(fd, &so); + if (error != 0) + return (error); + if (so == NULL) { + error = EBADF; + goto out; + } + + if (uap->endpoints == USER_ADDR_NULL) { + error = EINVAL; + goto out; + } + + if (IS_64BIT_PROCESS(p)) { + error = copyin(uap->endpoints, (caddr_t)&ep64, sizeof(ep64)); + if (error != 0) + goto out; + + ep.sae_srcif = ep64.sae_srcif; + ep.sae_srcaddr = ep64.sae_srcaddr; + ep.sae_srcaddrlen = ep64.sae_srcaddrlen; + ep.sae_dstaddr = ep64.sae_dstaddr; + ep.sae_dstaddrlen = ep64.sae_dstaddrlen; + } else { + error = copyin(uap->endpoints, (caddr_t)&ep32, sizeof(ep32)); + if (error != 0) + goto out; + + ep.sae_srcif = ep32.sae_srcif; + ep.sae_srcaddr = ep32.sae_srcaddr; + ep.sae_srcaddrlen = ep32.sae_srcaddrlen; + ep.sae_dstaddr = ep32.sae_dstaddr; + ep.sae_dstaddrlen = ep32.sae_dstaddrlen; + } + + /* + * Ask getsockaddr{_s} to not translate AF_UNSPEC to AF_INET + * if this is a datagram socket; translate for other types. + */ + dgram = (so->so_type == SOCK_DGRAM); + + /* + * Get socket address(es) now before we obtain socket lock; use + * sockaddr_list for src address for convenience, if present, + * even though it won't hold more than one. + */ + if (ep.sae_srcaddr != USER_ADDR_NULL && (error = getsockaddrlist(so, + &src_sl, (user_addr_t)(caddr_t)ep.sae_srcaddr, ep.sae_srcaddrlen, + dgram)) != 0) goto out; + + if (ep.sae_dstaddr == USER_ADDR_NULL) { + error = EINVAL; + goto out; + } + + error = getsockaddrlist(so, &dst_sl, (user_addr_t)(caddr_t)ep.sae_dstaddr, + ep.sae_dstaddrlen, dgram); + if (error != 0) + goto out; + + VERIFY(dst_sl != NULL && + !TAILQ_EMPTY(&dst_sl->sl_head) && dst_sl->sl_cnt > 0); + + if (uap->iov != USER_ADDR_NULL) { + /* Verify range before calling uio_create() */ + if (uap->iovcnt <= 0 || uap->iovcnt > UIO_MAXIOV) + return (EINVAL); + + if (uap->len == USER_ADDR_NULL) + return (EINVAL); + + /* allocate a uio to hold the number of iovecs passed */ + auio = uio_create(uap->iovcnt, 0, + (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), + UIO_WRITE); + + if (auio == NULL) { + error = ENOMEM; + goto out; + } + + /* + * get location of iovecs within the uio. + * then copyin the iovecs from user space. + */ + iovp = uio_iovsaddr(auio); + if (iovp == NULL) { + error = ENOMEM; + goto out; + } + error = copyin_user_iovec_array(uap->iov, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + uap->iovcnt, iovp); + if (error != 0) + goto out; + + /* finish setup of uio_t */ + error = uio_calculateresid(auio); + if (error != 0) { + goto out; + } + } + + error = connectitx(so, &src_sl, &dst_sl, p, ep.sae_srcif, uap->associd, + &cid, auio, uap->flags, &bytes_written); + if (error == ERESTART) + error = EINTR; + + if (uap->len != USER_ADDR_NULL) { + error1 = copyout(&bytes_written, uap->len, sizeof (uap->len)); + /* give precedence to connectitx errors */ + if ((error1 != 0) && (error == 0)) + error = error1; + } + + if (uap->connid != USER_ADDR_NULL) { + error1 = copyout(&cid, uap->connid, sizeof (cid)); + /* give precedence to connectitx errors */ + if ((error1 != 0) && (error == 0)) + error = error1; + } +out: + file_drop(fd); + if (auio != NULL) { + uio_free(auio); } + if (src_sl != NULL) + sockaddrlist_free(src_sl); + if (dst_sl != NULL) + sockaddrlist_free(dst_sl); + return (error); +} + +int +connectx(struct proc *p, struct connectx_args *uap, int *retval) +{ + /* + * Due to similiarity with a POSIX interface, define as + * an unofficial cancellation point. + */ + __pthread_testcancel(1); + return (connectx_nocancel(p, uap, retval)); +} + +static int +connectit(struct socket *so, struct sockaddr *sa) +{ + int error; + + AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), sa); +#if CONFIG_MACF_SOCKET_SUBSET + if ((error = mac_socket_check_connect(kauth_cred_get(), so, sa)) != 0) + return (error); #endif /* MAC_SOCKET_SUBSET */ - socket_lock(so, 1); + socket_lock(so, 1); if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { - if (want_free) - FREE(sa, M_SONAME); - socket_unlock(so, 1); error = EALREADY; goto out; } error = soconnectlock(so, sa, 0); - if (error) - goto bad; + if (error != 0) { + so->so_state &= ~SS_ISCONNECTING; + goto out; + } if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { - if (want_free) - FREE(sa, M_SONAME); - socket_unlock(so, 1); error = EINPROGRESS; goto out; } while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { + 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; error = msleep((caddr_t)&so->so_timeo, mutex_held, - PSOCK | PCATCH, "connect", 0); - if ((so->so_state & SS_DRAINING)) { + PSOCK | PCATCH, __func__, 0); + if (so->so_state & SS_DRAINING) { error = ECONNABORTED; } - if (error) + if (error != 0) break; } if (error == 0) { error = so->so_error; so->so_error = 0; } -bad: - so->so_state &= ~SS_ISCONNECTING; - socket_unlock(so, 1); - if (want_free) - FREE(sa, M_SONAME); - if (error == ERESTART) - error = EINTR; out: - file_drop(fd); + socket_unlock(so, 1); return (error); } -/* - * Returns: 0 Success - * socreate:EAFNOSUPPORT - * socreate:EPROTOTYPE - * socreate:EPROTONOSUPPORT - * socreate:ENOBUFS - * socreate:ENOMEM - * socreate:EISCONN - * socreate:??? [other protocol families, IPSEC] - * falloc:ENFILE - * falloc:EMFILE - * falloc:ENOMEM - * copyout:EFAULT - * soconnect2:EINVAL - * soconnect2:EPROTOTYPE - * soconnect2:??? [other protocol families[ - */ -int -socketpair(struct proc *p, struct socketpair_args *uap, - __unused int32_t *retval) +static int +connectitx(struct socket *so, struct sockaddr_list **src_sl, + struct sockaddr_list **dst_sl, struct proc *p, uint32_t ifscope, + sae_associd_t aid, sae_connid_t *pcid, uio_t auio, unsigned int flags, + user_ssize_t *bytes_written) { - struct fileproc *fp1, *fp2; - struct socket *so1, *so2; - int fd, error, sv[2]; + struct sockaddr_entry *se; + int error; +#pragma unused (flags) - AUDIT_ARG(socket, uap->domain, uap->type, uap->protocol); - error = socreate(uap->domain, &so1, uap->type, uap->protocol); - if (error) - return (error); - error = socreate(uap->domain, &so2, uap->type, uap->protocol); - if (error) - goto free1; + VERIFY(dst_sl != NULL && *dst_sl != NULL); - error = falloc(p, &fp1, &fd, vfs_context_current()); - if (error) { - goto free2; + TAILQ_FOREACH(se, &(*dst_sl)->sl_head, se_link) { + VERIFY(se->se_addr != NULL); + AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), + se->se_addr); +#if CONFIG_MACF_SOCKET_SUBSET + if ((error = mac_socket_check_connect(kauth_cred_get(), + so, se->se_addr)) != 0) + return (error); +#endif /* MAC_SOCKET_SUBSET */ } - fp1->f_flag = FREAD|FWRITE; - fp1->f_type = DTYPE_SOCKET; - fp1->f_ops = &socketops; - fp1->f_data = (caddr_t)so1; - sv[0] = fd; - error = falloc(p, &fp2, &fd, vfs_context_current()); - if (error) { - goto free3; + socket_lock(so, 1); + if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { + error = EALREADY; + goto out; } - fp2->f_flag = FREAD|FWRITE; - fp2->f_type = DTYPE_SOCKET; - fp2->f_ops = &socketops; - fp2->f_data = (caddr_t)so2; - sv[1] = fd; - error = soconnect2(so1, so2); - if (error) { - goto free4; - } - if (uap->type == SOCK_DGRAM) { - /* - * Datagram socket connection is asymmetric. - */ - error = soconnect2(so2, so1); - if (error) { - goto free4; - } - } + if ((so->so_proto->pr_flags & PR_DATA_IDEMPOTENT) && + (flags & CONNECT_DATA_IDEMPOTENT)) + so->so_flags1 |= SOF1_DATA_IDEMPOTENT; - proc_fdlock(p); - procfdtbl_releasefd(p, sv[0], NULL); + /* + * Case 1: CONNECT_RESUME_ON_READ_WRITE set, no data. + * Case 2: CONNECT_RESUME_ON_READ_WRITE set, with data (user error) + * Case 3: CONNECT_RESUME_ON_READ_WRITE not set, with data + * Case 3 allows user to combine write with connect even if they have + * no use for TFO (such as regular TCP, and UDP). + * Case 4: CONNECT_RESUME_ON_READ_WRITE not set, no data (regular case) + */ + if ((so->so_proto->pr_flags & PR_PRECONN_WRITE) && + ((flags & CONNECT_RESUME_ON_READ_WRITE) || auio)) + so->so_flags1 |= SOF1_PRECONNECT_DATA; + + /* + * If a user sets data idempotent and does not pass an uio, or + * sets CONNECT_RESUME_ON_READ_WRITE, this is an error, reset + * SOF1_DATA_IDEMPOTENT. + */ + if (!(so->so_flags1 & SOF1_PRECONNECT_DATA) && + (so->so_flags1 & SOF1_DATA_IDEMPOTENT)) { + /* We should return EINVAL instead perhaps. */ + so->so_flags1 &= ~SOF1_DATA_IDEMPOTENT; + } + + error = soconnectxlocked(so, src_sl, dst_sl, p, ifscope, + aid, pcid, 0, NULL, 0, auio, bytes_written); + if (error != 0) { + so->so_state &= ~SS_ISCONNECTING; + goto out; + } + /* + * If, after the call to soconnectxlocked the flag is still set (in case + * data has been queued and the connect() has actually been triggered, + * it will have been unset by the transport), we exit immediately. There + * is no reason to wait on any event. + */ + if (so->so_flags1 & SOF1_PRECONNECT_DATA) { + error = 0; + goto out; + } + if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { + error = EINPROGRESS; + goto out; + } + while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { + 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; + error = msleep((caddr_t)&so->so_timeo, mutex_held, + PSOCK | PCATCH, __func__, 0); + if (so->so_state & SS_DRAINING) { + error = ECONNABORTED; + } + if (error != 0) + break; + } + if (error == 0) { + error = so->so_error; + so->so_error = 0; + } +out: + socket_unlock(so, 1); + return (error); +} + +int +peeloff(struct proc *p, struct peeloff_args *uap, int *retval) +{ + /* + * Due to similiarity with a POSIX interface, define as + * an unofficial cancellation point. + */ + __pthread_testcancel(1); + return (peeloff_nocancel(p, uap, retval)); +} + +static int +peeloff_nocancel(struct proc *p, struct peeloff_args *uap, int *retval) +{ + struct fileproc *fp; + struct socket *mp_so, *so = NULL; + int newfd, fd = uap->s; + short fflag; /* type must match fp->f_flag */ + int error; + + *retval = -1; + + error = fp_getfsock(p, fd, &fp, &mp_so); + if (error != 0) { + if (error == EOPNOTSUPP) + error = ENOTSOCK; + goto out_nofile; + } + if (mp_so == NULL) { + error = EBADF; + goto out; + } + + socket_lock(mp_so, 1); + error = sopeelofflocked(mp_so, uap->aid, &so); + if (error != 0) { + socket_unlock(mp_so, 1); + goto out; + } + VERIFY(so != NULL); + socket_unlock(mp_so, 0); /* keep ref on mp_so for us */ + + fflag = fp->f_flag; + error = falloc(p, &fp, &newfd, vfs_context_current()); + if (error != 0) { + /* drop this socket (probably ran out of file descriptors) */ + soclose(so); + sodereference(mp_so); /* our mp_so ref */ + goto out; + } + + fp->f_flag = fflag; + fp->f_ops = &socketops; + fp->f_data = (caddr_t)so; + + /* + * If the socket has been marked as inactive by sosetdefunct(), + * disallow further operations on it. + */ + if (so->so_flags & SOF_DEFUNCT) { + sodefunct(current_proc(), so, + SHUTDOWN_SOCKET_LEVEL_DISCONNECT_INTERNAL); + } + + proc_fdlock(p); + procfdtbl_releasefd(p, newfd, NULL); + fp_drop(p, newfd, fp, 1); + proc_fdunlock(p); + + sodereference(mp_so); /* our mp_so ref */ + *retval = newfd; + +out: + file_drop(fd); + +out_nofile: + return (error); +} + +int +disconnectx(struct proc *p, struct disconnectx_args *uap, int *retval) +{ + /* + * Due to similiarity with a POSIX interface, define as + * an unofficial cancellation point. + */ + __pthread_testcancel(1); + return (disconnectx_nocancel(p, uap, retval)); +} + +static int +disconnectx_nocancel(struct proc *p, struct disconnectx_args *uap, int *retval) +{ +#pragma unused(p, retval) + struct socket *so; + int fd = uap->s; + int error; + + error = file_socket(fd, &so); + if (error != 0) + return (error); + if (so == NULL) { + error = EBADF; + goto out; + } + + error = sodisconnectx(so, uap->aid, uap->cid); +out: + file_drop(fd); + return (error); +} + +/* + * Returns: 0 Success + * socreate:EAFNOSUPPORT + * socreate:EPROTOTYPE + * socreate:EPROTONOSUPPORT + * socreate:ENOBUFS + * socreate:ENOMEM + * socreate:EISCONN + * socreate:??? [other protocol families, IPSEC] + * falloc:ENFILE + * falloc:EMFILE + * falloc:ENOMEM + * copyout:EFAULT + * soconnect2:EINVAL + * soconnect2:EPROTOTYPE + * soconnect2:??? [other protocol families[ + */ +int +socketpair(struct proc *p, struct socketpair_args *uap, + __unused int32_t *retval) +{ + struct fileproc *fp1, *fp2; + struct socket *so1, *so2; + int fd, error, sv[2]; + + AUDIT_ARG(socket, uap->domain, uap->type, uap->protocol); + error = socreate(uap->domain, &so1, uap->type, uap->protocol); + if (error) + return (error); + error = socreate(uap->domain, &so2, uap->type, uap->protocol); + if (error) + goto free1; + + error = falloc(p, &fp1, &fd, vfs_context_current()); + if (error) { + goto free2; + } + fp1->f_flag = FREAD|FWRITE; + fp1->f_ops = &socketops; + fp1->f_data = (caddr_t)so1; + sv[0] = fd; + + error = falloc(p, &fp2, &fd, vfs_context_current()); + if (error) { + goto free3; + } + fp2->f_flag = FREAD|FWRITE; + fp2->f_ops = &socketops; + fp2->f_data = (caddr_t)so2; + sv[1] = fd; + + error = soconnect2(so1, so2); + if (error) { + goto free4; + } + if (uap->type == SOCK_DGRAM) { + /* + * Datagram socket connection is asymmetric. + */ + error = soconnect2(so2, so1); + if (error) { + goto free4; + } + } + + if ((error = copyout(sv, uap->rsv, 2 * sizeof (int))) != 0) + goto free4; + + proc_fdlock(p); + procfdtbl_releasefd(p, sv[0], NULL); procfdtbl_releasefd(p, sv[1], NULL); fp_drop(p, sv[0], fp1, 1); fp_drop(p, sv[1], fp2, 1); proc_fdunlock(p); - error = copyout((caddr_t)sv, uap->rsv, 2 * sizeof (int)); - return (error); + return (0); free4: fp_free(p, sv[1], fp2); free3: @@ -796,7 +1272,7 @@ free1: * sockargs:??? */ static int -sendit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, +sendit(struct proc *p, struct socket *so, struct user_msghdr *mp, uio_t uiop, int flags, int32_t *retval) { struct mbuf *control = NULL; @@ -804,20 +1280,10 @@ sendit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, struct sockaddr *to = NULL; boolean_t want_free = TRUE; int error; - struct socket *so; user_ssize_t len; KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_START, 0, 0, 0, 0, 0); - error = file_socket(s, &so); - if (error) { - KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_END, error, 0, 0, 0, 0); - return (error); - } - if (so == NULL) { - error = EBADF; - goto out; - } if (mp->msg_name != USER_ADDR_NULL) { if (mp->msg_namelen > sizeof (ss)) { error = getsockaddr(so, &to, mp->msg_name, @@ -851,14 +1317,15 @@ sendit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, * if a race condition occurs, it would simply result * in an extra call to the MAC check function. */ - if (!(so->so_state & SS_ISCONNECTED) && + if (to != NULL && + !(so->so_state & SS_DEFUNCT) && (error = mac_socket_check_send(kauth_cred_get(), so, to)) != 0) goto bad; #endif /* MAC_SOCKET_SUBSET */ len = uio_resid(uiop); - error = so->so_proto->pr_usrreqs->pru_sosend(so, to, uiop, 0, control, - flags); + error = so->so_proto->pr_usrreqs->pru_sosend(so, to, uiop, 0, + control, flags); if (error != 0) { if (uio_resid(uiop) != len && (error == ERESTART || error == EINTR || error == EWOULDBLOCK)) @@ -874,7 +1341,7 @@ bad: FREE(to, M_SONAME); out: KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_END, error, 0, 0, 0, 0); - file_drop(s); + return (error); } @@ -888,15 +1355,18 @@ int sendto(struct proc *p, struct sendto_args *uap, int32_t *retval) { __pthread_testcancel(1); - return(sendto_nocancel(p, (struct sendto_nocancel_args *)uap, retval)); + return (sendto_nocancel(p, (struct sendto_nocancel_args *)uap, retval)); } int -sendto_nocancel(struct proc *p, struct sendto_nocancel_args *uap, int32_t *retval) +sendto_nocancel(struct proc *p, + struct sendto_nocancel_args *uap, + int32_t *retval) { struct user_msghdr msg; int error; uio_t auio = NULL; + struct socket *so; KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); @@ -905,7 +1375,8 @@ sendto_nocancel(struct proc *p, struct sendto_nocancel_args *uap, int32_t *retva (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), UIO_WRITE); if (auio == NULL) { - return (ENOMEM); + error = ENOMEM; + goto done; } uio_addiov(auio, uap->buf, uap->len); @@ -917,47 +1388,20 @@ sendto_nocancel(struct proc *p, struct sendto_nocancel_args *uap, int32_t *retva msg.msg_control = 0; msg.msg_flags = 0; - error = sendit(p, uap->s, &msg, auio, uap->flags, retval); + error = file_socket(uap->s, &so); + if (error) + goto done; - if (auio != NULL) { - uio_free(auio); + if (so == NULL) { + error = EBADF; + } else { + error = sendit(p, so, &msg, auio, uap->flags, retval); } -#if HACK_FOR_4056224 - /* - * Radar 4056224 - * Temporary workaround to let send() and recv() work over - * a pipe for binary compatibility - * This will be removed in the release following Tiger - */ - if (error == ENOTSOCK) { - struct fileproc *fp; - - if (fp_lookup(p, uap->s, &fp, 0) == 0) { - (void) fp_drop(p, uap->s, fp, 0); - - if (fp->f_type == DTYPE_PIPE) { - struct write_args write_uap; - user_ssize_t write_retval; - - if (p->p_pid > last_pid_4056224) { - last_pid_4056224 = p->p_pid; - - printf("%s[%d] uses send/recv " - "on a pipe\n", p->p_comm, p->p_pid); - } - - bzero(&write_uap, sizeof (struct write_args)); - write_uap.fd = uap->s; - write_uap.cbuf = uap->buf; - write_uap.nbyte = uap->len; - - error = write(p, &write_uap, &write_retval); - *retval = (int)write_retval; - } - } - } -#endif /* HACK_FOR_4056224 */ + file_drop(uap->s); +done: + if (auio != NULL) + uio_free(auio); KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_END, error, *retval, 0, 0, 0); @@ -974,11 +1418,13 @@ int sendmsg(struct proc *p, struct sendmsg_args *uap, int32_t *retval) { __pthread_testcancel(1); - return(sendmsg_nocancel(p, (struct sendmsg_nocancel_args *)uap, retval)); + return (sendmsg_nocancel(p, (struct sendmsg_nocancel_args *)uap, + retval)); } int -sendmsg_nocancel(struct proc *p, struct sendmsg_nocancel_args *uap, int32_t *retval) +sendmsg_nocancel(struct proc *p, struct sendmsg_nocancel_args *uap, + int32_t *retval) { struct user32_msghdr msg32; struct user64_msghdr msg64; @@ -988,6 +1434,7 @@ sendmsg_nocancel(struct proc *p, struct sendmsg_nocancel_args *uap, int32_t *ret int error; uio_t auio = NULL; struct user_iovec *iovp; + struct socket *so; KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); @@ -1028,48 +1475,374 @@ sendmsg_nocancel(struct proc *p, struct sendmsg_nocancel_args *uap, int32_t *ret return (EMSGSIZE); } - /* allocate a uio large enough to hold the number of iovecs passed */ - auio = uio_create(user_msg.msg_iovlen, 0, - (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), - UIO_WRITE); - if (auio == NULL) { - error = ENOBUFS; - goto done; + /* allocate a uio large enough to hold the number of iovecs passed */ + auio = uio_create(user_msg.msg_iovlen, 0, + (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), + UIO_WRITE); + if (auio == NULL) { + error = ENOBUFS; + goto done; + } + + if (user_msg.msg_iovlen) { + /* + * get location of iovecs within the uio. + * then copyin the iovecs from user space. + */ + iovp = uio_iovsaddr(auio); + if (iovp == NULL) { + error = ENOBUFS; + goto done; + } + error = copyin_user_iovec_array(user_msg.msg_iov, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + user_msg.msg_iovlen, iovp); + if (error) + goto done; + user_msg.msg_iov = CAST_USER_ADDR_T(iovp); + + /* finish setup of uio_t */ + error = uio_calculateresid(auio); + if (error) { + goto done; + } + } else { + user_msg.msg_iov = 0; + } + + /* msg_flags is ignored for send */ + user_msg.msg_flags = 0; + + error = file_socket(uap->s, &so); + if (error) { + goto done; + } + if (so == NULL) { + error = EBADF; + } else { + error = sendit(p, so, &user_msg, auio, uap->flags, retval); + } + file_drop(uap->s); +done: + if (auio != NULL) { + uio_free(auio); + } + KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_END, error, 0, 0, 0, 0); + + return (error); +} + +int +sendmsg_x(struct proc *p, struct sendmsg_x_args *uap, user_ssize_t *retval) +{ + int error = 0; + struct user_msghdr_x *user_msg_x = NULL; + struct uio **uiop = NULL; + struct socket *so; + u_int i; + struct sockaddr *to = NULL; + user_ssize_t len_before = 0, len_after; + int need_drop = 0; + size_t size_of_msghdr; + void *umsgp = NULL; + u_int uiocnt; + int has_addr_or_ctl = 0; + + KERNEL_DEBUG(DBG_FNC_SENDMSG_X | DBG_FUNC_START, 0, 0, 0, 0, 0); + + error = file_socket(uap->s, &so); + if (error) { + goto out; + } + need_drop = 1; + if (so == NULL) { + error = EBADF; + goto out; + } + + /* + * Input parameter range check + */ + if (uap->cnt == 0 || uap->cnt > UIO_MAXIOV) { + error = EINVAL; + goto out; + } + /* + * Clip to max currently allowed + */ + if (uap->cnt > somaxsendmsgx) + uap->cnt = somaxsendmsgx; + + user_msg_x = _MALLOC(uap->cnt * sizeof(struct user_msghdr_x), + M_TEMP, M_WAITOK | M_ZERO); + if (user_msg_x == NULL) { + DBG_PRINTF("%s _MALLOC() user_msg_x failed\n", __func__); + error = ENOMEM; + goto out; + } + uiop = _MALLOC(uap->cnt * sizeof(struct uio *), + M_TEMP, M_WAITOK | M_ZERO); + if (uiop == NULL) { + DBG_PRINTF("%s _MALLOC() uiop failed\n", __func__); + error = ENOMEM; + goto out; + } + + size_of_msghdr = IS_64BIT_PROCESS(p) ? + sizeof(struct user64_msghdr_x) : sizeof(struct user32_msghdr_x); + + umsgp = _MALLOC(uap->cnt * size_of_msghdr, + M_TEMP, M_WAITOK | M_ZERO); + if (umsgp == NULL) { + printf("%s _MALLOC() user_msg_x failed\n", __func__); + error = ENOMEM; + goto out; + } + error = copyin(uap->msgp, umsgp, uap->cnt * size_of_msghdr); + if (error) { + DBG_PRINTF("%s copyin() failed\n", __func__); + goto out; + } + error = internalize_user_msghdr_array(umsgp, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + UIO_WRITE, uap->cnt, user_msg_x, uiop); + if (error) { + DBG_PRINTF("%s copyin_user_msghdr_array() failed\n", __func__); + goto out; + } + /* + * Make sure the size of each message iovec and + * the aggregate size of all the iovec is valid + */ + if (uio_array_is_valid(uiop, uap->cnt) == 0) { + error = EINVAL; + goto out; + } + + /* + * Sanity check on passed arguments + */ + for (i = 0; i < uap->cnt; i++) { + struct user_msghdr_x *mp = user_msg_x + i; + + /* + * No flags on send message + */ + if (mp->msg_flags != 0) { + error = EINVAL; + goto out; + } + /* + * No support for address or ancillary data (yet) + */ + if (mp->msg_name != USER_ADDR_NULL || mp->msg_namelen != 0) + has_addr_or_ctl = 1; + + if (mp->msg_control != USER_ADDR_NULL || + mp->msg_controllen != 0) + has_addr_or_ctl = 1; + +#if CONFIG_MACF_SOCKET_SUBSET + /* + * We check the state without holding the socket lock; + * if a race condition occurs, it would simply result + * in an extra call to the MAC check function. + * + * Note: The following check is never true taken with the + * current limitation that we do not accept to pass an address, + * this is effectively placeholder code. If we add support for + * addresses, we will have to check every address. + */ + if (to != NULL && + !(so->so_state & SS_DEFUNCT) && + (error = mac_socket_check_send(kauth_cred_get(), so, to)) + != 0) + goto out; +#endif /* MAC_SOCKET_SUBSET */ + } + + len_before = uio_array_resid(uiop, uap->cnt); + + /* + * Feed list of packets at once only for connected socket without + * control message + */ + if (so->so_proto->pr_usrreqs->pru_sosend_list != + pru_sosend_list_notsupp && + has_addr_or_ctl == 0 && somaxsendmsgx == 0) { + error = so->so_proto->pr_usrreqs->pru_sosend_list(so, uiop, + uap->cnt, uap->flags); + } else { + for (i = 0; i < uap->cnt; i++) { + struct user_msghdr_x *mp = user_msg_x + i; + struct user_msghdr user_msg; + uio_t auio = uiop[i]; + int32_t tmpval; + + user_msg.msg_flags = mp->msg_flags; + user_msg.msg_controllen = mp->msg_controllen; + user_msg.msg_control = mp->msg_control; + user_msg.msg_iovlen = mp->msg_iovlen; + user_msg.msg_iov = mp->msg_iov; + user_msg.msg_namelen = mp->msg_namelen; + user_msg.msg_name = mp->msg_name; + + error = sendit(p, so, &user_msg, auio, uap->flags, + &tmpval); + if (error != 0) + break; + } + } + len_after = uio_array_resid(uiop, uap->cnt); + + VERIFY(len_after <= len_before); + + if (error != 0) { + if (len_after != len_before && (error == ERESTART || + error == EINTR || error == EWOULDBLOCK || + error == ENOBUFS)) + error = 0; + /* Generation of SIGPIPE can be controlled per socket */ + if (error == EPIPE && !(so->so_flags & SOF_NOSIGPIPE)) + psignal(p, SIGPIPE); + } + if (error == 0) { + uiocnt = externalize_user_msghdr_array(umsgp, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + UIO_WRITE, uap->cnt, user_msg_x, uiop); + + *retval = (int)(uiocnt); + } +out: + if (need_drop) + file_drop(uap->s); + if (umsgp != NULL) + _FREE(umsgp, M_TEMP); + if (uiop != NULL) { + free_uio_array(uiop, uap->cnt); + _FREE(uiop, M_TEMP); } + if (user_msg_x != NULL) + _FREE(user_msg_x, M_TEMP); - if (user_msg.msg_iovlen) { - /* - * get location of iovecs within the uio. - * then copyin the iovecs from user space. - */ - iovp = uio_iovsaddr(auio); - if (iovp == NULL) { - error = ENOBUFS; - goto done; - } - error = copyin_user_iovec_array(user_msg.msg_iov, - IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, - user_msg.msg_iovlen, iovp); - if (error) - goto done; - user_msg.msg_iov = CAST_USER_ADDR_T(iovp); + KERNEL_DEBUG(DBG_FNC_SENDMSG_X | DBG_FUNC_END, error, 0, 0, 0, 0); - /* finish setup of uio_t */ - uio_calculateresid(auio); + return (error); +} + + +static int +copyout_sa(struct sockaddr *fromsa, user_addr_t name, socklen_t *namelen) +{ + int error = 0; + socklen_t sa_len = 0; + ssize_t len; + + len = *namelen; + if (len <= 0 || fromsa == 0) { + len = 0; } else { - user_msg.msg_iov = 0; +#ifndef MIN +#define MIN(a, b) ((a) > (b) ? (b) : (a)) +#endif + sa_len = fromsa->sa_len; + len = MIN((unsigned int)len, sa_len); + error = copyout(fromsa, name, (unsigned)len); + if (error) + goto out; } + *namelen = sa_len; +out: + return (0); +} - /* msg_flags is ignored for send */ - user_msg.msg_flags = 0; +static int +copyout_control(struct proc *p, struct mbuf *m, user_addr_t control, + socklen_t *controllen, int *flags) +{ + int error = 0; + ssize_t len; + user_addr_t ctlbuf; - error = sendit(p, uap->s, &user_msg, auio, uap->flags, retval); -done: - if (auio != NULL) { - uio_free(auio); - } - KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_END, error, 0, 0, 0, 0); + len = *controllen; + *controllen = 0; + ctlbuf = control; + + while (m && len > 0) { + unsigned int tocopy; + struct cmsghdr *cp = mtod(m, struct cmsghdr *); + int cp_size = CMSG_ALIGN(cp->cmsg_len); + int buflen = m->m_len; + + while (buflen > 0 && len > 0) { + /* + * SCM_TIMESTAMP hack because struct timeval has a + * different size for 32 bits and 64 bits processes + */ + if (cp->cmsg_level == SOL_SOCKET && cp->cmsg_type == SCM_TIMESTAMP) { + unsigned char tmp_buffer[CMSG_SPACE(sizeof(struct user64_timeval))]; + struct cmsghdr *tmp_cp = (struct cmsghdr *)(void *)tmp_buffer; + int tmp_space; + struct timeval *tv = (struct timeval *)(void *)CMSG_DATA(cp); + + tmp_cp->cmsg_level = SOL_SOCKET; + tmp_cp->cmsg_type = SCM_TIMESTAMP; + if (proc_is64bit(p)) { + struct user64_timeval *tv64 = (struct user64_timeval *)(void *)CMSG_DATA(tmp_cp); + + tv64->tv_sec = tv->tv_sec; + tv64->tv_usec = tv->tv_usec; + + tmp_cp->cmsg_len = CMSG_LEN(sizeof(struct user64_timeval)); + tmp_space = CMSG_SPACE(sizeof(struct user64_timeval)); + } else { + struct user32_timeval *tv32 = (struct user32_timeval *)(void *)CMSG_DATA(tmp_cp); + + tv32->tv_sec = tv->tv_sec; + tv32->tv_usec = tv->tv_usec; + + tmp_cp->cmsg_len = CMSG_LEN(sizeof(struct user32_timeval)); + tmp_space = CMSG_SPACE(sizeof(struct user32_timeval)); + } + if (len >= tmp_space) { + tocopy = tmp_space; + } else { + *flags |= MSG_CTRUNC; + tocopy = len; + } + error = copyout(tmp_buffer, ctlbuf, tocopy); + if (error) + goto out; + } else { + if (cp_size > buflen) { + panic("cp_size > buflen, something" + "wrong with alignment!"); + } + if (len >= cp_size) { + tocopy = cp_size; + } else { + *flags |= MSG_CTRUNC; + tocopy = len; + } + error = copyout((caddr_t) cp, ctlbuf, tocopy); + if (error) + goto out; + } + + ctlbuf += tocopy; + len -= tocopy; + + buflen -= cp_size; + cp = (struct cmsghdr *)(void *) + ((unsigned char *) cp + cp_size); + cp_size = CMSG_ALIGN(cp->cmsg_len); + } + + m = m->m_next; + } + *controllen = ctlbuf - control; +out: return (error); } @@ -1099,9 +1872,9 @@ static int recvit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, user_addr_t namelenp, int32_t *retval) { - int len, error; - struct mbuf *m, *control = 0; - user_addr_t ctlbuf; + ssize_t len; + int error; + struct mbuf *control = 0; struct socket *so; struct sockaddr *fromsa = 0; struct fileproc *fp; @@ -1134,7 +1907,9 @@ recvit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, * if a race condition occurs, it would simply result * in an extra call to the MAC check function. */ - if (!(so->so_state & SS_ISCONNECTED) && + if (!(so->so_state & SS_DEFUNCT) && + !(so->so_state & SS_ISCONNECTED) && + !(so->so_proto->pr_flags & PR_CONNREQUIRED) && (error = mac_socket_check_receive(kauth_cred_get(), so)) != 0) goto out1; #endif /* MAC_SOCKET_SUBSET */ @@ -1156,104 +1931,26 @@ recvit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, error == EINTR || error == EWOULDBLOCK)) error = 0; } - if (error) goto out; *retval = len - uio_resid(uiop); - if (mp->msg_name) { - socklen_t sa_len = 0; - len = mp->msg_namelen; - if (len <= 0 || fromsa == 0) { - len = 0; - } else { -#ifndef MIN -#define MIN(a, b) ((a) > (b) ? (b) : (a)) -#endif - sa_len = fromsa->sa_len; - len = MIN((unsigned int)len, sa_len); - error = copyout(fromsa, mp->msg_name, (unsigned)len); - if (error) - goto out; - } - mp->msg_namelen = sa_len; + if (mp->msg_name) { + error = copyout_sa(fromsa, mp->msg_name, &mp->msg_namelen); + if (error) + goto out; /* return the actual, untruncated address length */ if (namelenp && - (error = copyout((caddr_t)&sa_len, namelenp, + (error = copyout((caddr_t)&mp->msg_namelen, namelenp, sizeof (int)))) { goto out; } } - if (mp->msg_control) { - len = mp->msg_controllen; - m = control; - mp->msg_controllen = 0; - ctlbuf = mp->msg_control; - - while (m && len > 0) { - unsigned int tocopy; - struct cmsghdr *cp = mtod(m, struct cmsghdr *); - - /* - * SCM_TIMESTAMP hack because struct timeval has a - * different size for 32 bits and 64 bits processes - */ - if (cp->cmsg_level == SOL_SOCKET && cp->cmsg_type == SCM_TIMESTAMP) { - unsigned char tmp_buffer[CMSG_SPACE(sizeof(struct user64_timeval))]; - struct cmsghdr *tmp_cp = (struct cmsghdr *)tmp_buffer; - int tmp_space; - struct timeval *tv = (struct timeval *)CMSG_DATA(cp); - - tmp_cp->cmsg_level = SOL_SOCKET; - tmp_cp->cmsg_type = SCM_TIMESTAMP; - - if (proc_is64bit(p)) { - struct user64_timeval *tv64 = (struct user64_timeval *)CMSG_DATA(tmp_cp); - - tv64->tv_sec = tv->tv_sec; - tv64->tv_usec = tv->tv_usec; - tmp_cp->cmsg_len = CMSG_LEN(sizeof(struct user64_timeval)); - tmp_space = CMSG_SPACE(sizeof(struct user64_timeval)); - } else { - struct user32_timeval *tv32 = (struct user32_timeval *)CMSG_DATA(tmp_cp); - - tv32->tv_sec = tv->tv_sec; - tv32->tv_usec = tv->tv_usec; - - tmp_cp->cmsg_len = CMSG_LEN(sizeof(struct user32_timeval)); - tmp_space = CMSG_SPACE(sizeof(struct user32_timeval)); - } - if (len >= tmp_space) { - tocopy = tmp_space; - } else { - mp->msg_flags |= MSG_CTRUNC; - tocopy = len; - } - error = copyout(tmp_buffer, ctlbuf, tocopy); - if (error) - goto out; - - } else { - if (len >= m->m_len) { - tocopy = m->m_len; - } else { - mp->msg_flags |= MSG_CTRUNC; - tocopy = len; - } - - error = copyout((caddr_t)mtod(m, caddr_t), ctlbuf, - tocopy); - if (error) - goto out; - } - - ctlbuf += tocopy; - len -= tocopy; - m = m->m_next; - } - mp->msg_controllen = ctlbuf - mp->msg_control; + if (mp->msg_control) { + error = copyout_control(p, control, mp->msg_control, + &mp->msg_controllen, &mp->msg_flags); } out: if (fromsa) @@ -1266,7 +1963,6 @@ out1: return (error); } - /* * Returns: 0 Success * ENOMEM @@ -1286,11 +1982,13 @@ int recvfrom(struct proc *p, struct recvfrom_args *uap, int32_t *retval) { __pthread_testcancel(1); - return(recvfrom_nocancel(p, (struct recvfrom_nocancel_args *)uap, retval)); + return (recvfrom_nocancel(p, (struct recvfrom_nocancel_args *)uap, + retval)); } int -recvfrom_nocancel(struct proc *p, struct recvfrom_nocancel_args *uap, int32_t *retval) +recvfrom_nocancel(struct proc *p, struct recvfrom_nocancel_args *uap, + int32_t *retval) { struct user_msghdr msg; int error; @@ -1327,42 +2025,6 @@ recvfrom_nocancel(struct proc *p, struct recvfrom_nocancel_args *uap, int32_t *r uio_free(auio); } -#if HACK_FOR_4056224 - /* - * Radar 4056224 - * Temporary workaround to let send() and recv() work over - * a pipe for binary compatibility - * This will be removed in the release following Tiger - */ - if (error == ENOTSOCK && proc_is64bit(p) == 0) { - struct fileproc *fp; - - if (fp_lookup(p, uap->s, &fp, 0) == 0) { - (void) fp_drop(p, uap->s, fp, 0); - - if (fp->f_type == DTYPE_PIPE) { - struct read_args read_uap; - user_ssize_t read_retval; - - if (p->p_pid > last_pid_4056224) { - last_pid_4056224 = p->p_pid; - - printf("%s[%d] uses send/recv on " - "a pipe\n", p->p_comm, p->p_pid); - } - - bzero(&read_uap, sizeof (struct read_args)); - read_uap.fd = uap->s; - read_uap.cbuf = uap->buf; - read_uap.nbyte = uap->len; - - error = read(p, &read_uap, &read_retval); - *retval = (int)read_retval; - } - } - } -#endif /* HACK_FOR_4056224 */ - KERNEL_DEBUG(DBG_FNC_RECVFROM | DBG_FUNC_END, error, 0, 0, 0, 0); return (error); @@ -1383,11 +2045,13 @@ int recvmsg(struct proc *p, struct recvmsg_args *uap, int32_t *retval) { __pthread_testcancel(1); - return(recvmsg_nocancel(p, (struct recvmsg_nocancel_args *)uap, retval)); + return (recvmsg_nocancel(p, (struct recvmsg_nocancel_args *)uap, + retval)); } int -recvmsg_nocancel(struct proc *p, struct recvmsg_nocancel_args *uap, int32_t *retval) +recvmsg_nocancel(struct proc *p, struct recvmsg_nocancel_args *uap, + int32_t *retval) { struct user32_msghdr msg32; struct user64_msghdr msg64; @@ -1468,7 +2132,10 @@ recvmsg_nocancel(struct proc *p, struct recvmsg_nocancel_args *uap, int32_t *ret goto done; /* finish setup of uio_t */ - uio_calculateresid(auio); + error = uio_calculateresid(auio); + if (error) { + goto done; + } error = recvit(p, uap->s, &user_msg, auio, 0, retval); if (!error) { @@ -1490,13 +2157,218 @@ recvmsg_nocancel(struct proc *p, struct recvmsg_nocancel_args *uap, int32_t *ret msg32.msg_namelen = user_msg.msg_namelen; msg32.msg_name = user_msg.msg_name; } - error = copyout(msghdrp, uap->msg, size_of_msghdr); + error = copyout(msghdrp, uap->msg, size_of_msghdr); + } +done: + if (auio != NULL) { + uio_free(auio); + } + KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_END, error, 0, 0, 0, 0); + return (error); +} + +int +recvmsg_x(struct proc *p, struct recvmsg_x_args *uap, user_ssize_t *retval) +{ + int error = EOPNOTSUPP; + struct user_msghdr_x *user_msg_x = NULL; + struct recv_msg_elem *recv_msg_array = NULL; + struct socket *so; + user_ssize_t len_before = 0, len_after; + int need_drop = 0; + size_t size_of_msghdr; + void *umsgp = NULL; + u_int i; + u_int uiocnt; + + KERNEL_DEBUG(DBG_FNC_RECVMSG_X | DBG_FUNC_START, 0, 0, 0, 0, 0); + + error = file_socket(uap->s, &so); + if (error) { + goto out; + } + need_drop = 1; + if (so == NULL) { + error = EBADF; + goto out; + } + /* + * Input parameter range check + */ + if (uap->cnt == 0 || uap->cnt > UIO_MAXIOV) { + error = EINVAL; + goto out; + } + if (uap->cnt > somaxrecvmsgx) + uap->cnt = somaxrecvmsgx; + + user_msg_x = _MALLOC(uap->cnt * sizeof(struct user_msghdr_x), + M_TEMP, M_WAITOK | M_ZERO); + if (user_msg_x == NULL) { + DBG_PRINTF("%s _MALLOC() user_msg_x failed\n", __func__); + error = ENOMEM; + goto out; + } + recv_msg_array = alloc_recv_msg_array(uap->cnt); + if (recv_msg_array == NULL) { + DBG_PRINTF("%s alloc_recv_msg_array() failed\n", __func__); + error = ENOMEM; + goto out; + } + size_of_msghdr = IS_64BIT_PROCESS(p) ? + sizeof(struct user64_msghdr_x) : sizeof(struct user32_msghdr_x); + + umsgp = _MALLOC(uap->cnt * size_of_msghdr, M_TEMP, M_WAITOK | M_ZERO); + if (umsgp == NULL) { + DBG_PRINTF("%s _MALLOC() umsgp failed\n", __func__); + error = ENOMEM; + goto out; + } + error = copyin(uap->msgp, umsgp, uap->cnt * size_of_msghdr); + if (error) { + DBG_PRINTF("%s copyin() failed\n", __func__); + goto out; + } + error = internalize_recv_msghdr_array(umsgp, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + UIO_READ, uap->cnt, user_msg_x, recv_msg_array); + if (error) { + DBG_PRINTF("%s copyin_user_msghdr_array() failed\n", __func__); + goto out; + } + /* + * Make sure the size of each message iovec and + * the aggregate size of all the iovec is valid + */ + if (recv_msg_array_is_valid(recv_msg_array, uap->cnt) == 0) { + error = EINVAL; + goto out; + } + /* + * Sanity check on passed arguments + */ + for (i = 0; i < uap->cnt; i++) { + struct user_msghdr_x *mp = user_msg_x + i; + + if (mp->msg_flags != 0) { + error = EINVAL; + goto out; + } + } +#if CONFIG_MACF_SOCKET_SUBSET + /* + * We check the state without holding the socket lock; + * if a race condition occurs, it would simply result + * in an extra call to the MAC check function. + */ + if (!(so->so_state & SS_DEFUNCT) && + !(so->so_state & SS_ISCONNECTED) && + !(so->so_proto->pr_flags & PR_CONNREQUIRED) && + (error = mac_socket_check_receive(kauth_cred_get(), so)) != 0) + goto out; +#endif /* MAC_SOCKET_SUBSET */ + + len_before = recv_msg_array_resid(recv_msg_array, uap->cnt); + + if (so->so_proto->pr_usrreqs->pru_soreceive_list != + pru_soreceive_list_notsupp && + somaxrecvmsgx == 0) { + error = so->so_proto->pr_usrreqs->pru_soreceive_list(so, + recv_msg_array, uap->cnt, &uap->flags); + } else { + int flags = uap->flags; + + for (i = 0; i < uap->cnt; i++) { + struct recv_msg_elem *recv_msg_elem; + uio_t auio; + struct sockaddr **psa; + struct mbuf **controlp; + + recv_msg_elem = recv_msg_array + i; + auio = recv_msg_elem->uio; + + /* + * Do not block if we got at least one packet + */ + if (i > 0) + flags |= MSG_DONTWAIT; + + psa = (recv_msg_elem->which & SOCK_MSG_SA) ? + &recv_msg_elem->psa : NULL; + controlp = (recv_msg_elem->which & SOCK_MSG_CONTROL) ? + &recv_msg_elem->controlp : NULL; + + error = so->so_proto->pr_usrreqs->pru_soreceive(so, psa, + auio, (struct mbuf **)0, controlp, &flags); + if (error) + break; + /* + * We have some data + */ + recv_msg_elem->which |= SOCK_MSG_DATA; + /* + * Stop on partial copy + */ + if (flags & (MSG_RCVMORE | MSG_TRUNC)) + break; + } + if ((uap->flags & MSG_DONTWAIT) == 0) + flags &= ~MSG_DONTWAIT; + uap->flags = flags; } -done: - if (auio != NULL) { - uio_free(auio); + + len_after = recv_msg_array_resid(recv_msg_array, uap->cnt); + + if (error) { + if (len_after != len_before && (error == ERESTART || + error == EINTR || error == EWOULDBLOCK)) + error = 0; + else + goto out; } - KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_END, error, 0, 0, 0, 0); + + uiocnt = externalize_recv_msghdr_array(umsgp, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + UIO_READ, uap->cnt, user_msg_x, recv_msg_array); + + error = copyout(umsgp, uap->msgp, uap->cnt * size_of_msghdr); + if (error) { + DBG_PRINTF("%s copyout() failed\n", __func__); + goto out; + } + *retval = (int)(uiocnt); + + for (i = 0; i < uap->cnt; i++) { + struct user_msghdr_x *mp = user_msg_x + i; + struct recv_msg_elem *recv_msg_elem = recv_msg_array + i; + struct sockaddr *fromsa = recv_msg_elem->psa; + + if (mp->msg_name) { + error = copyout_sa(fromsa, mp->msg_name, + &mp->msg_namelen); + if (error) + goto out; + } + if (mp->msg_control) { + error = copyout_control(p, recv_msg_elem->controlp, + mp->msg_control, &mp->msg_controllen, + &mp->msg_flags); + if (error) + goto out; + } + } +out: + if (need_drop) + file_drop(uap->s); + if (umsgp != NULL) + _FREE(umsgp, M_TEMP); + if (recv_msg_array != NULL) + free_recv_msg_array(recv_msg_array, uap->cnt); + if (user_msg_x != NULL) + _FREE(user_msg_x, M_TEMP); + + KERNEL_DEBUG(DBG_FNC_RECVMSG_X | DBG_FUNC_END, error, 0, 0, 0, 0); + return (error); } @@ -1591,7 +2463,7 @@ setsockopt(struct proc *p, struct setsockopt_args *uap, &sopt)) != 0) goto out; #endif /* MAC_SOCKET_SUBSET */ - error = sosetopt(so, &sopt); + error = sosetoptlock(so, &sopt, 1); /* will lock socket */ out: file_drop(uap->s); return (error); @@ -1647,7 +2519,7 @@ getsockopt(struct proc *p, struct getsockopt_args *uap, &sopt)) != 0) goto out; #endif /* MAC_SOCKET_SUBSET */ - error = sogetopt((struct socket *)so, &sopt); + error = sogetoptlock((struct socket *)so, &sopt, 1); /* will lock */ if (error == 0) { valsize = sopt.sopt_valsize; error = copyout((caddr_t)&valsize, uap->avalsize, @@ -1698,28 +2570,9 @@ getsockname(__unused struct proc *p, struct getsockname_args *uap, socket_lock(so, 1); error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa); if (error == 0) { - struct socket_filter_entry *filter; - int filtered = 0; - for (filter = so->so_filt; filter && error == 0; - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_getsockname) { - if (!filtered) { - filtered = 1; - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter. - sf_getsockname(filter->sfe_cookie, so, &sa); - } - } - + error = sflt_getsockname(so, &sa); if (error == EJUSTRETURN) error = 0; - - if (filtered) { - socket_lock(so, 0); - sflt_unuse(so); - } } socket_unlock(so, 1); if (error) @@ -1802,28 +2655,9 @@ getpeername(__unused struct proc *p, struct getpeername_args *uap, sa = 0; error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa); if (error == 0) { - struct socket_filter_entry *filter; - int filtered = 0; - for (filter = so->so_filt; filter && error == 0; - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_getpeername) { - if (!filtered) { - filtered = 1; - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter. - sf_getpeername(filter->sfe_cookie, so, &sa); - } - } - + error = sflt_getpeername(so, &sa); if (error == EJUSTRETURN) error = 0; - - if (filtered) { - socket_lock(so, 0); - sflt_unuse(so); - } } socket_unlock(so, 1); if (error) @@ -1855,30 +2689,39 @@ sockargs(struct mbuf **mp, user_addr_t data, int buflen, int type) struct mbuf *m; int error; - int alloc_buflen = buflen; + size_t alloc_buflen = (size_t)buflen; + + if (alloc_buflen > INT_MAX/2) + return (EINVAL); #ifdef __LP64__ - /* The fd's in the buffer must expand to be pointers, thus we need twice as much space */ - if(type == MT_CONTROL) - alloc_buflen = ((buflen - sizeof(struct cmsghdr))*2) + sizeof(struct cmsghdr); + /* + * The fd's in the buffer must expand to be pointers, thus we need twice + * as much space + */ + if (type == MT_CONTROL) + alloc_buflen = ((buflen - sizeof(struct cmsghdr))*2) + + sizeof(struct cmsghdr); #endif - if ((u_int)alloc_buflen > MLEN) { - if (type == MT_SONAME && (u_int)alloc_buflen <= 112) - alloc_buflen = MLEN; /* unix domain compat. hack */ - else if ((u_int)alloc_buflen > MCLBYTES) + if (alloc_buflen > MLEN) { + if (type == MT_SONAME && alloc_buflen <= 112) + alloc_buflen = MLEN; /* unix domain compat. hack */ + else if (alloc_buflen > MCLBYTES) return (EINVAL); } m = m_get(M_WAIT, type); if (m == NULL) return (ENOBUFS); - if ((u_int)alloc_buflen > MLEN) { + if (alloc_buflen > MLEN) { MCLGET(m, M_WAIT); if ((m->m_flags & M_EXT) == 0) { m_free(m); return (ENOBUFS); } } - /* K64: We still copyin the original buflen because it gets expanded later - * and we lie about the size of the mbuf because it only affects unp_* functions + /* + * K64: We still copyin the original buflen because it gets expanded + * later and we lie about the size of the mbuf because it only affects + * unp_* functions */ m->m_len = buflen; error = copyin(data, mtod(m, caddr_t), (u_int)buflen); @@ -1931,7 +2774,7 @@ getsockaddr(struct socket *so, struct sockaddr **namp, user_addr_t uaddr, * handle it. */ if (translate_unspec && sa->sa_family == AF_UNSPEC && - INP_CHECK_SOCKAF(so, AF_INET) && + SOCK_CHECK_DOM(so, PF_INET) && len == sizeof (struct sockaddr_in)) sa->sa_family = AF_INET; @@ -1968,7 +2811,7 @@ getsockaddr_s(struct socket *so, struct sockaddr_storage *ss, * handle it. */ if (translate_unspec && ss->ss_family == AF_UNSPEC && - INP_CHECK_SOCKAF(so, AF_INET) && + SOCK_CHECK_DOM(so, PF_INET) && len == sizeof (struct sockaddr_in)) ss->ss_family = AF_INET; @@ -1977,40 +2820,476 @@ getsockaddr_s(struct socket *so, struct sockaddr_storage *ss, return (error); } -#if SENDFILE +/* + * Hard limit on the number of source and/or destination addresses + * that can be specified by an application. + */ +#define SOCKADDRLIST_MAX_ENTRIES 64 -SYSCTL_DECL(_kern_ipc); +static int +getsockaddrlist(struct socket *so, struct sockaddr_list **slp, + user_addr_t uaddr, socklen_t uaddrlen, boolean_t xlate_unspec) +{ + struct sockaddr_list *sl; + int error = 0; -#define SFUIOBUFS 64 -static int sendfileuiobufs = SFUIOBUFS; -SYSCTL_INT(_kern_ipc, OID_AUTO, sendfileuiobufs, CTLFLAG_RW, &sendfileuiobufs, - 0, ""); + *slp = NULL; -/* Macros to compute the number of mbufs needed depending on cluster size */ -#define HOWMANY_16K(n) ((((unsigned int)(n) - 1) >> (PGSHIFT + 2)) + 1) -#define HOWMANY_4K(n) ((((unsigned int)(n) - 1) >> PGSHIFT) + 1) + if (uaddr == USER_ADDR_NULL || uaddrlen == 0 || + uaddrlen > (sizeof(struct sockaddr_in6) * SOCKADDRLIST_MAX_ENTRIES)) + return (EINVAL); -/* Upper send limit in bytes (sendfileuiobufs * PAGESIZE) */ -#define SENDFILE_MAX_BYTES (sendfileuiobufs << PGSHIFT) + sl = sockaddrlist_alloc(M_WAITOK); + if (sl == NULL) + return (ENOMEM); -/* Upper send limit in the number of mbuf clusters */ -#define SENDFILE_MAX_16K HOWMANY_16K(SENDFILE_MAX_BYTES) -#define SENDFILE_MAX_4K HOWMANY_4K(SENDFILE_MAX_BYTES) + VERIFY(sl->sl_cnt == 0); + while (uaddrlen > 0 && sl->sl_cnt < SOCKADDRLIST_MAX_ENTRIES) { + struct sockaddr_storage ss; + struct sockaddr_entry *se; + struct sockaddr *sa; + + if (uaddrlen < sizeof (struct sockaddr)) { + error = EINVAL; + break; + } + + bzero(&ss, sizeof (ss)); + error = copyin(uaddr, (caddr_t)&ss, sizeof (struct sockaddr)); + if (error != 0) + break; + + /* getsockaddr does the same but we need them now */ + if (uaddrlen < ss.ss_len || + ss.ss_len < offsetof(struct sockaddr, sa_data[0])) { + error = EINVAL; + break; + } else if (ss.ss_len > sizeof (ss)) { + /* + * sockaddr_storage size is less than SOCK_MAXADDRLEN, + * so the check here is inclusive. We could use the + * latter instead, but seems like an overkill for now. + */ + error = ENAMETOOLONG; + break; + } + + se = sockaddrentry_alloc(M_WAITOK); + if (se == NULL) { + error = ENOBUFS; + break; + } + + sockaddrlist_insert(sl, se); + + error = getsockaddr(so, &sa, uaddr, ss.ss_len, xlate_unspec); + if (error != 0) + break; + + VERIFY(sa != NULL && sa->sa_len == ss.ss_len); + se->se_addr = sa; + + uaddr += ss.ss_len; + VERIFY(((signed)uaddrlen - ss.ss_len) >= 0); + uaddrlen -= ss.ss_len; + } + + if (error != 0) + sockaddrlist_free(sl); + else + *slp = sl; + + return (error); +} + +int +internalize_user_msghdr_array(const void *src, int spacetype, int direction, + u_int count, struct user_msghdr_x *dst, struct uio **uiop) +{ + int error = 0; + u_int i; + u_int namecnt = 0; + u_int ctlcnt = 0; + + for (i = 0; i < count; i++) { + uio_t auio; + struct user_iovec *iovp; + struct user_msghdr_x *user_msg = dst + i; + + if (spacetype == UIO_USERSPACE64) { + const struct user64_msghdr_x *msghdr64; + + msghdr64 = ((const struct user64_msghdr_x *)src) + i; + + user_msg->msg_name = msghdr64->msg_name; + user_msg->msg_namelen = msghdr64->msg_namelen; + user_msg->msg_iov = msghdr64->msg_iov; + user_msg->msg_iovlen = msghdr64->msg_iovlen; + user_msg->msg_control = msghdr64->msg_control; + user_msg->msg_controllen = msghdr64->msg_controllen; + user_msg->msg_flags = msghdr64->msg_flags; + user_msg->msg_datalen = msghdr64->msg_datalen; + } else { + const struct user32_msghdr_x *msghdr32; + + msghdr32 = ((const struct user32_msghdr_x *)src) + i; + + user_msg->msg_name = msghdr32->msg_name; + user_msg->msg_namelen = msghdr32->msg_namelen; + user_msg->msg_iov = msghdr32->msg_iov; + user_msg->msg_iovlen = msghdr32->msg_iovlen; + user_msg->msg_control = msghdr32->msg_control; + user_msg->msg_controllen = msghdr32->msg_controllen; + user_msg->msg_flags = msghdr32->msg_flags; + user_msg->msg_datalen = msghdr32->msg_datalen; + } + + if (user_msg->msg_iovlen <= 0 || + user_msg->msg_iovlen > UIO_MAXIOV) { + error = EMSGSIZE; + goto done; + } + auio = uio_create(user_msg->msg_iovlen, 0, spacetype, + direction); + if (auio == NULL) { + error = ENOMEM; + goto done; + } + uiop[i] = auio; + + iovp = uio_iovsaddr(auio); + if (iovp == NULL) { + error = ENOMEM; + goto done; + } + error = copyin_user_iovec_array(user_msg->msg_iov, + spacetype, user_msg->msg_iovlen, iovp); + if (error) + goto done; + user_msg->msg_iov = CAST_USER_ADDR_T(iovp); + + error = uio_calculateresid(auio); + if (error) + goto done; + user_msg->msg_datalen = uio_resid(auio); + + if (user_msg->msg_name && user_msg->msg_namelen) + namecnt++; + if (user_msg->msg_control && user_msg->msg_controllen) + ctlcnt++; + } +done: + + return (error); +} + +int +internalize_recv_msghdr_array(const void *src, int spacetype, int direction, + u_int count, struct user_msghdr_x *dst, + struct recv_msg_elem *recv_msg_array) +{ + int error = 0; + u_int i; + + for (i = 0; i < count; i++) { + struct user_iovec *iovp; + struct user_msghdr_x *user_msg = dst + i; + struct recv_msg_elem *recv_msg_elem = recv_msg_array + i; + + if (spacetype == UIO_USERSPACE64) { + const struct user64_msghdr_x *msghdr64; + + msghdr64 = ((const struct user64_msghdr_x *)src) + i; + + user_msg->msg_name = msghdr64->msg_name; + user_msg->msg_namelen = msghdr64->msg_namelen; + user_msg->msg_iov = msghdr64->msg_iov; + user_msg->msg_iovlen = msghdr64->msg_iovlen; + user_msg->msg_control = msghdr64->msg_control; + user_msg->msg_controllen = msghdr64->msg_controllen; + user_msg->msg_flags = msghdr64->msg_flags; + user_msg->msg_datalen = msghdr64->msg_datalen; + } else { + const struct user32_msghdr_x *msghdr32; + + msghdr32 = ((const struct user32_msghdr_x *)src) + i; + + user_msg->msg_name = msghdr32->msg_name; + user_msg->msg_namelen = msghdr32->msg_namelen; + user_msg->msg_iov = msghdr32->msg_iov; + user_msg->msg_iovlen = msghdr32->msg_iovlen; + user_msg->msg_control = msghdr32->msg_control; + user_msg->msg_controllen = msghdr32->msg_controllen; + user_msg->msg_flags = msghdr32->msg_flags; + user_msg->msg_datalen = msghdr32->msg_datalen; + } + + if (user_msg->msg_iovlen <= 0 || + user_msg->msg_iovlen > UIO_MAXIOV) { + error = EMSGSIZE; + goto done; + } + recv_msg_elem->uio = uio_create(user_msg->msg_iovlen, 0, + spacetype, direction); + if (recv_msg_elem->uio == NULL) { + error = ENOMEM; + goto done; + } + + iovp = uio_iovsaddr(recv_msg_elem->uio); + if (iovp == NULL) { + error = ENOMEM; + goto done; + } + error = copyin_user_iovec_array(user_msg->msg_iov, + spacetype, user_msg->msg_iovlen, iovp); + if (error) + goto done; + user_msg->msg_iov = CAST_USER_ADDR_T(iovp); + + error = uio_calculateresid(recv_msg_elem->uio); + if (error) + goto done; + user_msg->msg_datalen = uio_resid(recv_msg_elem->uio); + + if (user_msg->msg_name && user_msg->msg_namelen) + recv_msg_elem->which |= SOCK_MSG_SA; + if (user_msg->msg_control && user_msg->msg_controllen) + recv_msg_elem->which |= SOCK_MSG_CONTROL; + } +done: + + return (error); +} + +u_int +externalize_user_msghdr_array(void *dst, int spacetype, int direction, + u_int count, const struct user_msghdr_x *src, struct uio **uiop) +{ +#pragma unused(direction) + u_int i; + int seenlast = 0; + u_int retcnt = 0; + + for (i = 0; i < count; i++) { + const struct user_msghdr_x *user_msg = src + i; + uio_t auio = uiop[i]; + user_ssize_t len = user_msg->msg_datalen - uio_resid(auio); + + if (user_msg->msg_datalen != 0 && len == 0) + seenlast = 1; + + if (seenlast == 0) + retcnt ++; + + if (spacetype == UIO_USERSPACE64) { + struct user64_msghdr_x *msghdr64; + + msghdr64 = ((struct user64_msghdr_x *)dst) + i; + + msghdr64->msg_flags = user_msg->msg_flags; + msghdr64->msg_datalen = len; + + } else { + struct user32_msghdr_x *msghdr32; + + msghdr32 = ((struct user32_msghdr_x *)dst) + i; + + msghdr32->msg_flags = user_msg->msg_flags; + msghdr32->msg_datalen = len; + } + } + return (retcnt); +} + +u_int +externalize_recv_msghdr_array(void *dst, int spacetype, int direction, + u_int count, const struct user_msghdr_x *src, + struct recv_msg_elem *recv_msg_array) +{ + u_int i; + int seenlast = 0; + u_int retcnt = 0; + + for (i = 0; i < count; i++) { + const struct user_msghdr_x *user_msg = src + i; + struct recv_msg_elem *recv_msg_elem = recv_msg_array + i; + user_ssize_t len; + + len = user_msg->msg_datalen - uio_resid(recv_msg_elem->uio); + + if (direction == UIO_READ) { + if ((recv_msg_elem->which & SOCK_MSG_DATA) == 0) + seenlast = 1; + } else { + if (user_msg->msg_datalen != 0 && len == 0) + seenlast = 1; + } + + if (seenlast == 0) + retcnt ++; + + if (spacetype == UIO_USERSPACE64) { + struct user64_msghdr_x *msghdr64; + + msghdr64 = ((struct user64_msghdr_x *)dst) + i; + + msghdr64->msg_flags = user_msg->msg_flags; + msghdr64->msg_datalen = len; + + } else { + struct user32_msghdr_x *msghdr32; + + msghdr32 = ((struct user32_msghdr_x *)dst) + i; + + msghdr32->msg_flags = user_msg->msg_flags; + msghdr32->msg_datalen = len; + } + } + return (retcnt); +} + +void +free_uio_array(struct uio **uiop, u_int count) +{ + u_int i; + + for (i = 0; i < count; i++) { + if (uiop[i] != NULL) + uio_free(uiop[i]); + } +} + +__private_extern__ user_ssize_t +uio_array_resid(struct uio **uiop, u_int count) +{ + user_ssize_t len = 0; + u_int i; + + for (i = 0; i < count; i++) { + struct uio *auio = uiop[i]; + + if (auio != NULL) + len += uio_resid(auio); + } + return (len); +} + +int +uio_array_is_valid(struct uio **uiop, u_int count) +{ + user_ssize_t len = 0; + u_int i; + + for (i = 0; i < count; i++) { + struct uio *auio = uiop[i]; + + if (auio != NULL) { + user_ssize_t resid = uio_resid(auio); + + /* + * Sanity check on the validity of the iovec: + * no point of going over sb_max + */ + if (resid < 0 || (u_int32_t)resid > sb_max) + return (0); + + len += resid; + if (len < 0 || (u_int32_t)len > sb_max) + return (0); + } + } + return (1); +} + + +struct recv_msg_elem * +alloc_recv_msg_array(u_int count) +{ + struct recv_msg_elem *recv_msg_array; + + recv_msg_array = _MALLOC(count * sizeof(struct recv_msg_elem), + M_TEMP, M_WAITOK | M_ZERO); + + return (recv_msg_array); +} + +void +free_recv_msg_array(struct recv_msg_elem *recv_msg_array, u_int count) +{ + u_int i; + + for (i = 0; i < count; i++) { + struct recv_msg_elem *recv_msg_elem = recv_msg_array + i; + + if (recv_msg_elem->uio != NULL) + uio_free(recv_msg_elem->uio); + if (recv_msg_elem->psa != NULL) + _FREE(recv_msg_elem->psa, M_TEMP); + if (recv_msg_elem->controlp != NULL) + m_freem(recv_msg_elem->controlp); + } + _FREE(recv_msg_array, M_TEMP); +} + + +__private_extern__ user_ssize_t +recv_msg_array_resid(struct recv_msg_elem *recv_msg_array, u_int count) +{ + user_ssize_t len = 0; + u_int i; + + for (i = 0; i < count; i++) { + struct recv_msg_elem *recv_msg_elem = recv_msg_array + i; -size_t mbuf_pkt_maxlen(mbuf_t m); + if (recv_msg_elem->uio != NULL) + len += uio_resid(recv_msg_elem->uio); + } + return (len); +} -__private_extern__ size_t -mbuf_pkt_maxlen(mbuf_t m) +int +recv_msg_array_is_valid(struct recv_msg_elem *recv_msg_array, u_int count) { - size_t maxlen = 0; + user_ssize_t len = 0; + u_int i; + + for (i = 0; i < count; i++) { + struct recv_msg_elem *recv_msg_elem = recv_msg_array + i; + + if (recv_msg_elem->uio != NULL) { + user_ssize_t resid = uio_resid(recv_msg_elem->uio); + + /* + * Sanity check on the validity of the iovec: + * no point of going over sb_max + */ + if (resid < 0 || (u_int32_t)resid > sb_max) + return (0); - while (m) { - maxlen += mbuf_maxlen(m); - m = mbuf_next(m); + len += resid; + if (len < 0 || (u_int32_t)len > sb_max) + return (0); + } } - return (maxlen); + return (1); } +#if SENDFILE + +#define SFUIOBUFS 64 + +/* Macros to compute the number of mbufs needed depending on cluster size */ +#define HOWMANY_16K(n) ((((unsigned int)(n) - 1) >> M16KCLSHIFT) + 1) +#define HOWMANY_4K(n) ((((unsigned int)(n) - 1) >> MBIGCLSHIFT) + 1) + +/* Upper send limit in bytes (SFUIOBUFS * PAGESIZE) */ +#define SENDFILE_MAX_BYTES (SFUIOBUFS << PGSHIFT) + +/* Upper send limit in the number of mbuf clusters */ +#define SENDFILE_MAX_16K HOWMANY_16K(SENDFILE_MAX_BYTES) +#define SENDFILE_MAX_4K HOWMANY_4K(SENDFILE_MAX_BYTES) + static void alloc_sendpkt(int how, size_t pktlen, unsigned int *maxchunks, struct mbuf **m, boolean_t jumbocl) @@ -2026,13 +3305,13 @@ alloc_sendpkt(int how, size_t pktlen, unsigned int *maxchunks, * use mbuf_allocpacket(). The logic below is similar to sosend(). */ *m = NULL; - if (pktlen > NBPG && jumbocl) { + if (pktlen > MBIGCLBYTES && jumbocl) { needed = MIN(SENDFILE_MAX_16K, HOWMANY_16K(pktlen)); *m = m_getpackets_internal(&needed, 1, how, 0, M16KCLBYTES); } if (*m == NULL) { needed = MIN(SENDFILE_MAX_4K, HOWMANY_4K(pktlen)); - *m = m_getpackets_internal(&needed, 1, how, 0, NBPG); + *m = m_getpackets_internal(&needed, 1, how, 0, MBIGCLBYTES); } /* @@ -2043,7 +3322,7 @@ alloc_sendpkt(int how, size_t pktlen, unsigned int *maxchunks, */ if (*m == NULL) { needed = 1; - *m = m_getpackets_internal(&needed, 1, M_WAIT, 1, NBPG); + *m = m_getpackets_internal(&needed, 1, M_WAIT, 1, MBIGCLBYTES); } if (*m == NULL) panic("%s: blocking allocation returned NULL\n", __func__); @@ -2184,8 +3463,9 @@ sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) nuap.iovp = user_hdtr.headers; nuap.iovcnt = user_hdtr.hdr_cnt; error = writev_nocancel(p, &nuap, &writev_retval); - if (error) + if (error) { goto done2; + } sbytes += writev_retval; } } @@ -2195,8 +3475,9 @@ sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) * 1. We don't want to allocate more mbufs than necessary * 2. We don't want to read past the end of file */ - if ((error = vnode_size(vp, &file_size, vfs_context_current())) != 0) + if ((error = vnode_size(vp, &file_size, vfs_context_current())) != 0) { goto done2; + } /* * Simply read file data into a chain of mbufs that used with scatter @@ -2204,16 +3485,16 @@ sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) * mbufs that point to the file pages. */ socket_lock(so, 1); - error = sblock(&so->so_snd, M_WAIT); + error = sblock(&so->so_snd, SBL_WAIT); if (error) { socket_unlock(so, 1); goto done2; } for (off = uap->offset; ; off += xfsize, sbytes += xfsize) { mbuf_t m0 = NULL, m; - unsigned int nbufs = sendfileuiobufs, i; + unsigned int nbufs = SFUIOBUFS, i; uio_t auio; - char uio_buf[UIO_SIZEOF(sendfileuiobufs)]; /* 1 KB !!! */ + char uio_buf[UIO_SIZEOF(SFUIOBUFS)]; /* 1 KB !!! */ size_t uiolen; user_ssize_t rlen; off_t pgoff; @@ -2266,14 +3547,15 @@ sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) socket_unlock(so, 0); alloc_sendpkt(M_WAIT, xfsize, &nbufs, &m0, jumbocl); - pktlen = mbuf_pkt_maxlen(m0); + pktlen = mbuf_pkthdr_maxlen(m0); if (pktlen < (size_t)xfsize) xfsize = pktlen; auio = uio_createwithbuffer(nbufs, off, UIO_SYSSPACE, UIO_READ, &uio_buf[0], sizeof (uio_buf)); if (auio == NULL) { - //printf("sendfile: uio_createwithbuffer failed\n"); + printf("sendfile failed. nbufs = %d. %s", nbufs, + "File a radar related to rdar://10146739.\n"); mbuf_freem(m0); error = ENXIO; socket_lock(so, 0); @@ -2295,7 +3577,7 @@ sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) if (xfsize != uio_resid(auio)) printf("sendfile: xfsize: %lld != uio_resid(auio): " - "%lld\n", xfsize, uio_resid(auio)); + "%lld\n", xfsize, (long long)uio_resid(auio)); KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_READ | DBG_FUNC_START), uap->s, (unsigned int)((xfsize >> 32) & 0x0ffffffff), @@ -2317,7 +3599,7 @@ sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) (unsigned int)(xfsize & 0x0ffffffff), 0, 0); if (xfsize == 0) { - //printf("sendfile: fo_read 0 bytes, EOF\n"); + // printf("sendfile: fo_read 0 bytes, EOF\n"); break; } if (xfsize + off > file_size) @@ -2385,53 +3667,20 @@ retry_space: } goto retry_space; } + + struct mbuf *control = NULL; { /* * Socket filter processing */ - struct socket_filter_entry *filter; - int filtered = 0; - struct mbuf *control = NULL; - boolean_t recursive = (so->so_send_filt_thread != NULL); - - error = 0; - for (filter = so->so_filt; filter && (error == 0); - filter = filter->sfe_next_onsocket) { - if (filter->sfe_filter->sf_filter.sf_data_out) { - if (filtered == 0) { - filtered = 1; - so->so_send_filt_thread = - current_thread(); - sflt_use(so); - socket_unlock(so, 0); - } - error = filter->sfe_filter->sf_filter. - sf_data_out(filter->sfe_cookie, so, - NULL, &m0, &control, 0); - } - } - 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; - continue; - } - goto done3; + error = sflt_data_out(so, NULL, &m0, &control, 0); + if (error) { + if (error == EJUSTRETURN) { + error = 0; + continue; } + goto done3; } /* * End Socket filter processing @@ -2440,14 +3689,14 @@ retry_space: KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_SEND | DBG_FUNC_START), uap->s, 0, 0, 0, 0); error = (*so->so_proto->pr_usrreqs->pru_send)(so, 0, m0, - 0, 0, p); + 0, control, p); KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_SEND | DBG_FUNC_START), uap->s, 0, 0, 0, 0); if (error) { goto done3; } } - sbunlock(&so->so_snd, 0); /* will unlock socket */ + sbunlock(&so->so_snd, FALSE); /* will unlock socket */ /* * Send trailers. Wimp out and use writev(2). */ @@ -2458,8 +3707,9 @@ retry_space: nuap.iovp = user_hdtr.trailers; nuap.iovcnt = user_hdtr.trl_cnt; error = writev_nocancel(p, &nuap, &writev_retval); - if (error) + if (error) { goto done2; + } sbytes += writev_retval; } done2: @@ -2476,7 +3726,7 @@ done: (unsigned int)(sbytes & 0x0ffffffff), error, 0); return (error); done3: - sbunlock(&so->so_snd, 0); /* will unlock socket */ + sbunlock(&so->so_snd, FALSE); /* will unlock socket */ goto done2; }