/* * Copyright (c) 2000-2013 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 * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * 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, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * 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@ */ /* * Copyright (c) 1982, 1986, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * * sendfile(2) and related extensions: * Copyright (c) 1998, David Greenman. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if CONFIG_MACF_SOCKET_SUBSET #include #endif /* MAC_SOCKET_SUBSET */ #define f_flag f_fglob->fg_flag #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) #define DBG_LAYER_OUT_END NETDBG_CODE(DBG_NETSOCK, 3) #define DBG_FNC_SENDMSG NETDBG_CODE(DBG_NETSOCK, (1 << 8) | 1) #define DBG_FNC_SENDTO NETDBG_CODE(DBG_NETSOCK, (2 << 8) | 1) #define DBG_FNC_SENDIT NETDBG_CODE(DBG_NETSOCK, (3 << 8) | 1) #define DBG_FNC_RECVFROM NETDBG_CODE(DBG_NETSOCK, (5 << 8)) #define DBG_FNC_RECVMSG NETDBG_CODE(DBG_NETSOCK, (6 << 8)) #define DBG_FNC_RECVIT NETDBG_CODE(DBG_NETSOCK, (7 << 8)) #define DBG_FNC_SENDFILE NETDBG_CODE(DBG_NETSOCK, (10 << 8)) #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)) /* 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 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, associd_t, connid_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); /* * System call interface to the socket abstraction. */ extern const struct fileops socketops; /* * Returns: 0 Success * EACCES Mandatory Access Control failure * falloc:ENFILE * falloc:EMFILE * falloc:ENOMEM * socreate:EAFNOSUPPORT * socreate:EPROTOTYPE * socreate:EPROTONOSUPPORT * socreate:ENOBUFS * socreate:ENOMEM * socreate:??? [other protocol families, IPSEC] */ int 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, domain, type, protocol); #if CONFIG_MACF_SOCKET_SUBSET 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_ops = &socketops; 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 { fp->f_data = (caddr_t)so; proc_fdlock(p); procfdtbl_releasefd(p, fd, NULL); fp_drop(p, fd, fp, 1); proc_fdunlock(p); *retval = fd; } return (error); } /* * Returns: 0 Success * EDESTADDRREQ Destination address required * EBADF Bad file descriptor * EACCES Mandatory Access Control failure * file_socket:ENOTSOCK * file_socket:EBADF * getsockaddr:ENAMETOOLONG Filename too long * getsockaddr:EINVAL Invalid argument * getsockaddr:ENOMEM Not enough space * getsockaddr:EFAULT Bad address * sobindlock:??? */ /* ARGSUSED */ int bind(__unused proc_t p, struct bind_args *uap, __unused int32_t *retval) { struct sockaddr_storage ss; struct sockaddr *sa = NULL; struct socket *so; boolean_t want_free = TRUE; int error; AUDIT_ARG(fd, uap->s); error = file_socket(uap->s, &so); if (error != 0) return (error); if (so == NULL) { error = EBADF; goto out; } if (uap->name == USER_ADDR_NULL) { error = EDESTADDRREQ; goto out; } if (uap->namelen > sizeof (ss)) { error = getsockaddr(so, &sa, uap->name, uap->namelen, TRUE); } else { error = getsockaddr_s(so, &ss, uap->name, uap->namelen, TRUE); 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_bind(kauth_cred_get(), so, sa)) == 0) error = sobindlock(so, sa, 1); /* will lock socket */ #else error = sobindlock(so, sa, 1); /* will lock socket */ #endif /* MAC_SOCKET_SUBSET */ if (want_free) FREE(sa, M_SONAME); out: file_drop(uap->s); return (error); } /* * Returns: 0 Success * EBADF * EACCES Mandatory Access Control failure * file_socket:ENOTSOCK * file_socket:EBADF * solisten:EINVAL * solisten:EOPNOTSUPP * solisten:??? */ int listen(__unused struct proc *p, struct listen_args *uap, __unused int32_t *retval) { int error; struct socket *so; AUDIT_ARG(fd, uap->s); error = file_socket(uap->s, &so); if (error) return (error); if (so != NULL) #if CONFIG_MACF_SOCKET_SUBSET { error = mac_socket_check_listen(kauth_cred_get(), so); if (error == 0) error = solisten(so, uap->backlog); } #else error = solisten(so, uap->backlog); #endif /* MAC_SOCKET_SUBSET */ else error = EBADF; file_drop(uap->s); return (error); } /* * Returns: fp_getfsock:EBADF Bad file descriptor * fp_getfsock:EOPNOTSUPP ... * xlate => :ENOTSOCK Socket operation on non-socket * :EFAULT Bad address on copyin/copyout * :EBADF Bad file descriptor * :EOPNOTSUPP Operation not supported on socket * :EINVAL Invalid argument * :EWOULDBLOCK Operation would block * :ECONNABORTED Connection aborted * :EINTR Interrupted function * :EACCES Mandatory Access Control failure * falloc_locked:ENFILE Too many files open in system * falloc_locked::EMFILE Too many open files * falloc_locked::ENOMEM Not enough space * 0 Success */ int accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, int32_t *retval) { struct fileproc *fp; struct sockaddr *sa = NULL; socklen_t namelen; int error; struct socket *head, *so = NULL; lck_mtx_t *mutex_held; int fd = uap->s; int newfd; short fflag; /* type must match fp->f_flag */ int dosocklock = 0; *retval = -1; AUDIT_ARG(fd, uap->s); if (uap->name) { error = copyin(uap->anamelen, (caddr_t)&namelen, sizeof (socklen_t)); if (error) return (error); } error = fp_getfsock(p, fd, &fp, &head); if (error) { if (error == EOPNOTSUPP) error = ENOTSOCK; return (error); } if (head == NULL) { error = EBADF; goto out; } #if CONFIG_MACF_SOCKET_SUBSET if ((error = mac_socket_check_accept(kauth_cred_get(), head)) != 0) goto out; #endif /* MAC_SOCKET_SUBSET */ socket_lock(head, 1); if (head->so_proto->pr_getlock != NULL) { mutex_held = (*head->so_proto->pr_getlock)(head, 0); dosocklock = 1; } else { mutex_held = head->so_proto->pr_domain->dom_mtx; dosocklock = 0; } if ((head->so_options & SO_ACCEPTCONN) == 0) { if ((head->so_proto->pr_flags & PR_CONNREQUIRED) == 0) { error = EOPNOTSUPP; } else { /* POSIX: The socket is not accepting connections */ error = EINVAL; } socket_unlock(head, 1); goto out; } if ((head->so_state & SS_NBIO) && head->so_comp.tqh_first == NULL) { socket_unlock(head, 1); error = EWOULDBLOCK; goto out; } while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) { if (head->so_state & SS_CANTRCVMORE) { head->so_error = ECONNABORTED; break; } if (head->so_usecount < 1) panic("accept: head=%p refcount=%d\n", head, head->so_usecount); error = msleep((caddr_t)&head->so_timeo, mutex_held, PSOCK | PCATCH, "accept", 0); if (head->so_usecount < 1) panic("accept: 2 head=%p refcount=%d\n", head, head->so_usecount); if ((head->so_state & SS_DRAINING)) { error = ECONNABORTED; } if (error) { socket_unlock(head, 1); goto out; } } if (head->so_error) { error = head->so_error; head->so_error = 0; socket_unlock(head, 1); 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 * allocating the file descriptor for it since falloc() may * block allowing another process to accept the connection * instead. */ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED); so = TAILQ_FIRST(&head->so_comp); TAILQ_REMOVE(&head->so_comp, so, so_list); head->so_qlen--; /* unlock head to avoid deadlock with select, keep a ref on head */ socket_unlock(head, 0); #if CONFIG_MACF_SOCKET_SUBSET /* * Pass the pre-accepted socket to the MAC framework. This is * cheaper than allocating a file descriptor for the socket, * calling the protocol accept callback, and possibly freeing * the file descriptor should the MAC check fails. */ if ((error = mac_socket_check_accepted(kauth_cred_get(), so)) != 0) { socket_lock(so, 1); so->so_state &= ~(SS_NOFDREF | SS_COMP); so->so_head = NULL; socket_unlock(so, 1); soclose(so); /* Drop reference on listening socket */ sodereference(head); goto out; } #endif /* MAC_SOCKET_SUBSET */ /* * 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) { /* Drop reference on listening socket */ sodereference(head); /* Propagate socket filter's error code to the caller */ goto out; } fflag = fp->f_flag; error = falloc(p, &fp, &newfd, vfs_context_current()); if (error) { /* * 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(so, 1); so->so_state &= ~(SS_NOFDREF | SS_COMP); so->so_head = NULL; socket_unlock(so, 1); soclose(so); sodereference(head); goto out; } *retval = newfd; 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; (void) soacceptlock(so, &sa, 0); socket_unlock(head, 1); if (sa == NULL) { namelen = 0; if (uap->name) goto gotnoname; error = 0; goto releasefd; } AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), sa); if (uap->name) { socklen_t sa_len; /* save sa_len before it is destroyed */ sa_len = sa->sa_len; namelen = MIN(namelen, sa_len); error = copyout(sa, uap->name, namelen); if (!error) /* return the actual, untruncated address length */ namelen = sa_len; gotnoname: error = copyout((caddr_t)&namelen, uap->anamelen, sizeof (socklen_t)); } FREE(sa, M_SONAME); releasefd: /* * 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); } if (dosocklock) socket_unlock(so, 1); proc_fdlock(p); procfdtbl_releasefd(p, newfd, NULL); fp_drop(p, newfd, fp, 1); proc_fdunlock(p); out: file_drop(fd); return (error); } 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)); } /* * Returns: 0 Success * EBADF Bad file descriptor * EALREADY Connection already in progress * EINPROGRESS Operation in progress * ECONNABORTED Connection aborted * EINTR Interrupted function * EACCES Mandatory Access Control failure * file_socket:ENOTSOCK * file_socket:EBADF * getsockaddr:ENAMETOOLONG Filename too long * getsockaddr:EINVAL Invalid argument * getsockaddr:ENOMEM Not enough space * getsockaddr:EFAULT Bad address * soconnectlock:EOPNOTSUPP * soconnectlock:EISCONN * soconnectlock:??? [depends on protocol, filters] * msleep:EINTR * * Imputed: so_error error may be set from so_error, which * may have been set by soconnectlock. */ /* ARGSUSED */ 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)); } int 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; int error; int fd = uap->s; boolean_t dgram; AUDIT_ARG(fd, uap->s); error = file_socket(fd, &so); if (error != 0) return (error); if (so == NULL) { error = EBADF; goto out; } /* * 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 now before we obtain socket lock */ if (uap->namelen > sizeof (ss)) { error = getsockaddr(so, &sa, uap->name, uap->namelen, !dgram); } else { error = getsockaddr_s(so, &ss, uap->name, uap->namelen, !dgram); if (error == 0) sa = (struct sockaddr *)&ss; } if (error != 0) goto out; 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, fd = uap->s; boolean_t dgram; connid_t cid = CONNID_ANY; AUDIT_ARG(fd, uap->s); error = file_socket(fd, &so); if (error != 0) return (error); if (so == NULL) { error = EBADF; goto out; } /* * 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 (uap->src != USER_ADDR_NULL && (error = getsockaddrlist(so, &src_sl, uap->src, uap->srclen, dgram)) != 0) goto out; error = getsockaddrlist(so, &dst_sl, uap->dsts, uap->dstlen, dgram); if (error != 0) goto out; VERIFY(dst_sl != NULL && !TAILQ_EMPTY(&dst_sl->sl_head) && dst_sl->sl_cnt > 0); error = connectitx(so, &src_sl, &dst_sl, p, uap->ifscope, uap->aid, &cid); if (error == ERESTART) error = EINTR; if (uap->cid != USER_ADDR_NULL) (void) copyout(&cid, uap->cid, sizeof (cid)); out: file_drop(fd); 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); if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { error = EALREADY; goto out; } error = soconnectlock(so, sa, 0); if (error != 0) { so->so_state &= ~SS_ISCONNECTING; 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); } static int connectitx(struct socket *so, struct sockaddr_list **src_sl, struct sockaddr_list **dst_sl, struct proc *p, uint32_t ifscope, associd_t aid, connid_t *pcid) { struct sockaddr_entry *se; int error; VERIFY(dst_sl != NULL && *dst_sl != NULL); 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 */ } socket_lock(so, 1); if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { error = EALREADY; goto out; } error = soconnectxlocked(so, src_sl, dst_sl, p, ifscope, aid, pcid, 0, NULL, 0); if (error != 0) { so->so_state &= ~SS_ISCONNECTING; 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); return (0); free4: fp_free(p, sv[1], fp2); free3: fp_free(p, sv[0], fp1); free2: (void) soclose(so2); free1: (void) soclose(so1); return (error); } /* * Returns: 0 Success * EINVAL * ENOBUFS * EBADF * EPIPE * EACCES Mandatory Access Control failure * file_socket:ENOTSOCK * file_socket:EBADF * getsockaddr:ENAMETOOLONG Filename too long * getsockaddr:EINVAL Invalid argument * getsockaddr:ENOMEM Not enough space * getsockaddr:EFAULT Bad address * :EACCES[TCP] * :EADDRINUSE[TCP] * :EADDRNOTAVAIL[TCP] * :EAFNOSUPPORT[TCP] * :EAGAIN[TCP] * :EBADF * :ECONNRESET[TCP] * :EFAULT * :EHOSTUNREACH[TCP] * :EINTR * :EINVAL * :EISCONN[AF_INET] * :EMSGSIZE[TCP] * :ENETDOWN[TCP] * :ENETUNREACH[TCP] * :ENOBUFS * :ENOMEM[TCP] * :ENOTCONN[AF_INET] * :EOPNOTSUPP * :EPERM[TCP] * :EPIPE * :EWOULDBLOCK * :???[TCP] [ignorable: mostly IPSEC/firewall/DLIL] * :???[AF_INET] [whatever a filter author chooses] * :??? [value from so_error] * sockargs:??? */ static int sendit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, int flags, int32_t *retval) { struct mbuf *control = NULL; struct sockaddr_storage ss; 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, mp->msg_namelen, TRUE); } else { error = getsockaddr_s(so, &ss, mp->msg_name, mp->msg_namelen, TRUE); if (error == 0) { to = (struct sockaddr *)&ss; want_free = FALSE; } } if (error != 0) goto out; AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), to); } if (mp->msg_control != USER_ADDR_NULL) { if (mp->msg_controllen < sizeof (struct cmsghdr)) { error = EINVAL; goto bad; } error = sockargs(&control, mp->msg_control, mp->msg_controllen, MT_CONTROL); if (error != 0) goto bad; } #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 ( 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); if (error != 0) { if (uio_resid(uiop) != len && (error == ERESTART || error == EINTR || error == EWOULDBLOCK)) error = 0; /* Generation of SIGPIPE can be controlled per socket */ if (error == EPIPE && !(so->so_flags & SOF_NOSIGPIPE)) psignal(p, SIGPIPE); } if (error == 0) *retval = (int)(len - uio_resid(uiop)); bad: if (to != NULL && want_free) FREE(to, M_SONAME); out: KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_END, error, 0, 0, 0, 0); file_drop(s); return (error); } /* * Returns: 0 Success * ENOMEM * sendit:??? [see sendit definition in this file] * write:??? [4056224: applicable for pipes] */ 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)); } int sendto_nocancel(struct proc *p, struct sendto_nocancel_args *uap, int32_t *retval) { struct user_msghdr msg; int error; uio_t auio = NULL; KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); auio = uio_create(1, 0, (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), UIO_WRITE); if (auio == NULL) { return (ENOMEM); } uio_addiov(auio, uap->buf, uap->len); msg.msg_name = uap->to; msg.msg_namelen = uap->tolen; /* no need to set up msg_iov. sendit uses uio_t we send it */ msg.msg_iov = 0; msg.msg_iovlen = 0; msg.msg_control = 0; msg.msg_flags = 0; error = sendit(p, uap->s, &msg, auio, uap->flags, retval); if (auio != NULL) { uio_free(auio); } KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_END, error, *retval, 0, 0, 0); return (error); } /* * Returns: 0 Success * ENOBUFS * copyin:EFAULT * sendit:??? [see sendit definition in this file] */ 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)); } int sendmsg_nocancel(struct proc *p, struct sendmsg_nocancel_args *uap, int32_t *retval) { struct user32_msghdr msg32; struct user64_msghdr msg64; struct user_msghdr user_msg; caddr_t msghdrp; int size_of_msghdr; int error; uio_t auio = NULL; struct user_iovec *iovp; KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); if (IS_64BIT_PROCESS(p)) { msghdrp = (caddr_t)&msg64; size_of_msghdr = sizeof (msg64); } else { msghdrp = (caddr_t)&msg32; size_of_msghdr = sizeof (msg32); } error = copyin(uap->msg, msghdrp, size_of_msghdr); if (error) { KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_END, error, 0, 0, 0, 0); return (error); } if (IS_64BIT_PROCESS(p)) { user_msg.msg_flags = msg64.msg_flags; user_msg.msg_controllen = msg64.msg_controllen; user_msg.msg_control = msg64.msg_control; user_msg.msg_iovlen = msg64.msg_iovlen; user_msg.msg_iov = msg64.msg_iov; user_msg.msg_namelen = msg64.msg_namelen; user_msg.msg_name = msg64.msg_name; } else { user_msg.msg_flags = msg32.msg_flags; user_msg.msg_controllen = msg32.msg_controllen; user_msg.msg_control = msg32.msg_control; user_msg.msg_iovlen = msg32.msg_iovlen; user_msg.msg_iov = msg32.msg_iov; user_msg.msg_namelen = msg32.msg_namelen; user_msg.msg_name = msg32.msg_name; } if (user_msg.msg_iovlen <= 0 || user_msg.msg_iovlen > UIO_MAXIOV) { KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_END, EMSGSIZE, 0, 0, 0, 0); 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; } 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 = 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); return (error); } /* * Returns: 0 Success * ENOTSOCK * EINVAL * EBADF * EACCES Mandatory Access Control failure * copyout:EFAULT * fp_lookup:EBADF * :ENOBUFS * :ENOTCONN * :EWOULDBLOCK * :EFAULT * :EINTR * :EBADF * :EINVAL * :EMSGSIZE * :??? * * Notes: Additional return values from calls through * depend on protocols other than TCP or AF_UNIX, which are * documented above. */ static int recvit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, user_addr_t namelenp, int32_t *retval) { ssize_t len; int error; struct mbuf *m, *control = 0; user_addr_t ctlbuf; struct socket *so; struct sockaddr *fromsa = 0; struct fileproc *fp; KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_START, 0, 0, 0, 0, 0); proc_fdlock(p); if ((error = fp_lookup(p, s, &fp, 1))) { KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_END, error, 0, 0, 0, 0); proc_fdunlock(p); return (error); } if (fp->f_type != DTYPE_SOCKET) { fp_drop(p, s, fp, 1); proc_fdunlock(p); return (ENOTSOCK); } so = (struct socket *)fp->f_data; if (so == NULL) { fp_drop(p, s, fp, 1); proc_fdunlock(p); return (EBADF); } proc_fdunlock(p); #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 out1; #endif /* MAC_SOCKET_SUBSET */ if (uio_resid(uiop) < 0) { KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_END, EINVAL, 0, 0, 0, 0); error = EINVAL; goto out1; } len = uio_resid(uiop); error = so->so_proto->pr_usrreqs->pru_soreceive(so, &fromsa, uiop, (struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0, &mp->msg_flags); if (fromsa) AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), fromsa); if (error) { if (uio_resid(uiop) != len && (error == ERESTART || 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; /* return the actual, untruncated address length */ if (namelenp && (error = copyout((caddr_t)&sa_len, 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 *); 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 { mp->msg_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 { mp->msg_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; } mp->msg_controllen = ctlbuf - mp->msg_control; } out: if (fromsa) FREE(fromsa, M_SONAME); if (control) m_freem(control); KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_END, error, 0, 0, 0, 0); out1: fp_drop(p, s, fp, 0); return (error); } /* * Returns: 0 Success * ENOMEM * copyin:EFAULT * recvit:??? * read:??? [4056224: applicable for pipes] * * Notes: The read entry point is only called as part of support for * binary backward compatability; new code should use read * instead of recv or recvfrom when attempting to read data * from pipes. * * For full documentation of the return codes from recvit, see * the block header for the recvit function. */ 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)); } int recvfrom_nocancel(struct proc *p, struct recvfrom_nocancel_args *uap, int32_t *retval) { struct user_msghdr msg; int error; uio_t auio = NULL; KERNEL_DEBUG(DBG_FNC_RECVFROM | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); if (uap->fromlenaddr) { error = copyin(uap->fromlenaddr, (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen)); if (error) return (error); } else { msg.msg_namelen = 0; } msg.msg_name = uap->from; auio = uio_create(1, 0, (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), UIO_READ); if (auio == NULL) { return (ENOMEM); } uio_addiov(auio, uap->buf, uap->len); /* no need to set up msg_iov. recvit uses uio_t we send it */ msg.msg_iov = 0; msg.msg_iovlen = 0; msg.msg_control = 0; msg.msg_controllen = 0; msg.msg_flags = uap->flags; error = recvit(p, uap->s, &msg, auio, uap->fromlenaddr, retval); if (auio != NULL) { uio_free(auio); } KERNEL_DEBUG(DBG_FNC_RECVFROM | DBG_FUNC_END, error, 0, 0, 0, 0); return (error); } /* * Returns: 0 Success * EMSGSIZE * ENOMEM * copyin:EFAULT * copyout:EFAULT * recvit:??? * * Notes: For full documentation of the return codes from recvit, see * the block header for the recvit function. */ 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)); } int recvmsg_nocancel(struct proc *p, struct recvmsg_nocancel_args *uap, int32_t *retval) { struct user32_msghdr msg32; struct user64_msghdr msg64; struct user_msghdr user_msg; caddr_t msghdrp; int size_of_msghdr; user_addr_t uiov; int error; uio_t auio = NULL; struct user_iovec *iovp; KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); if (IS_64BIT_PROCESS(p)) { msghdrp = (caddr_t)&msg64; size_of_msghdr = sizeof (msg64); } else { msghdrp = (caddr_t)&msg32; size_of_msghdr = sizeof (msg32); } error = copyin(uap->msg, msghdrp, size_of_msghdr); if (error) { KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_END, error, 0, 0, 0, 0); return (error); } /* only need to copy if user process is not 64-bit */ if (IS_64BIT_PROCESS(p)) { user_msg.msg_flags = msg64.msg_flags; user_msg.msg_controllen = msg64.msg_controllen; user_msg.msg_control = msg64.msg_control; user_msg.msg_iovlen = msg64.msg_iovlen; user_msg.msg_iov = msg64.msg_iov; user_msg.msg_namelen = msg64.msg_namelen; user_msg.msg_name = msg64.msg_name; } else { user_msg.msg_flags = msg32.msg_flags; user_msg.msg_controllen = msg32.msg_controllen; user_msg.msg_control = msg32.msg_control; user_msg.msg_iovlen = msg32.msg_iovlen; user_msg.msg_iov = msg32.msg_iov; user_msg.msg_namelen = msg32.msg_namelen; user_msg.msg_name = msg32.msg_name; } if (user_msg.msg_iovlen <= 0 || user_msg.msg_iovlen > UIO_MAXIOV) { KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_END, EMSGSIZE, 0, 0, 0, 0); return (EMSGSIZE); } user_msg.msg_flags = uap->flags; /* 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_READ); if (auio == NULL) { error = ENOMEM; goto done; } /* * get location of iovecs within the uio. then copyin the iovecs from * user space. */ iovp = uio_iovsaddr(auio); if (iovp == NULL) { error = ENOMEM; goto done; } uiov = user_msg.msg_iov; user_msg.msg_iov = CAST_USER_ADDR_T(iovp); error = copyin_user_iovec_array(uiov, IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, user_msg.msg_iovlen, iovp); if (error) goto done; /* finish setup of uio_t */ error = uio_calculateresid(auio); if (error) { goto done; } error = recvit(p, uap->s, &user_msg, auio, 0, retval); if (!error) { user_msg.msg_iov = uiov; if (IS_64BIT_PROCESS(p)) { msg64.msg_flags = user_msg.msg_flags; msg64.msg_controllen = user_msg.msg_controllen; msg64.msg_control = user_msg.msg_control; msg64.msg_iovlen = user_msg.msg_iovlen; msg64.msg_iov = user_msg.msg_iov; msg64.msg_namelen = user_msg.msg_namelen; msg64.msg_name = user_msg.msg_name; } else { msg32.msg_flags = user_msg.msg_flags; msg32.msg_controllen = user_msg.msg_controllen; msg32.msg_control = user_msg.msg_control; msg32.msg_iovlen = user_msg.msg_iovlen; msg32.msg_iov = user_msg.msg_iov; msg32.msg_namelen = user_msg.msg_namelen; msg32.msg_name = user_msg.msg_name; } 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); } /* * Returns: 0 Success * EBADF * file_socket:ENOTSOCK * file_socket:EBADF * soshutdown:EINVAL * soshutdown:ENOTCONN * soshutdown:EADDRNOTAVAIL[TCP] * soshutdown:ENOBUFS[TCP] * soshutdown:EMSGSIZE[TCP] * soshutdown:EHOSTUNREACH[TCP] * soshutdown:ENETUNREACH[TCP] * soshutdown:ENETDOWN[TCP] * soshutdown:ENOMEM[TCP] * soshutdown:EACCES[TCP] * soshutdown:EMSGSIZE[TCP] * soshutdown:ENOBUFS[TCP] * soshutdown:???[TCP] [ignorable: mostly IPSEC/firewall/DLIL] * soshutdown:??? [other protocol families] */ /* ARGSUSED */ int shutdown(__unused struct proc *p, struct shutdown_args *uap, __unused int32_t *retval) { struct socket *so; int error; AUDIT_ARG(fd, uap->s); error = file_socket(uap->s, &so); if (error) return (error); if (so == NULL) { error = EBADF; goto out; } error = soshutdown((struct socket *)so, uap->how); out: file_drop(uap->s); return (error); } /* * Returns: 0 Success * EFAULT * EINVAL * EACCES Mandatory Access Control failure * file_socket:ENOTSOCK * file_socket:EBADF * sosetopt:EINVAL * sosetopt:ENOPROTOOPT * sosetopt:ENOBUFS * sosetopt:EDOM * sosetopt:EFAULT * sosetopt:EOPNOTSUPP[AF_UNIX] * sosetopt:??? */ /* ARGSUSED */ int setsockopt(struct proc *p, struct setsockopt_args *uap, __unused int32_t *retval) { struct socket *so; struct sockopt sopt; int error; AUDIT_ARG(fd, uap->s); if (uap->val == 0 && uap->valsize != 0) return (EFAULT); /* No bounds checking on size (it's unsigned) */ error = file_socket(uap->s, &so); if (error) return (error); sopt.sopt_dir = SOPT_SET; sopt.sopt_level = uap->level; sopt.sopt_name = uap->name; sopt.sopt_val = uap->val; sopt.sopt_valsize = uap->valsize; sopt.sopt_p = p; if (so == NULL) { error = EINVAL; goto out; } #if CONFIG_MACF_SOCKET_SUBSET if ((error = mac_socket_check_setsockopt(kauth_cred_get(), so, &sopt)) != 0) goto out; #endif /* MAC_SOCKET_SUBSET */ error = sosetoptlock(so, &sopt, 1); /* will lock socket */ out: file_drop(uap->s); return (error); } /* * Returns: 0 Success * EINVAL * EBADF * EACCES Mandatory Access Control failure * copyin:EFAULT * copyout:EFAULT * file_socket:ENOTSOCK * file_socket:EBADF * sogetopt:??? */ int getsockopt(struct proc *p, struct getsockopt_args *uap, __unused int32_t *retval) { int error; socklen_t valsize; struct sockopt sopt; struct socket *so; error = file_socket(uap->s, &so); if (error) return (error); if (uap->val) { error = copyin(uap->avalsize, (caddr_t)&valsize, sizeof (valsize)); if (error) goto out; /* No bounds checking on size (it's unsigned) */ } else { valsize = 0; } sopt.sopt_dir = SOPT_GET; sopt.sopt_level = uap->level; sopt.sopt_name = uap->name; sopt.sopt_val = uap->val; sopt.sopt_valsize = (size_t)valsize; /* checked non-negative above */ sopt.sopt_p = p; if (so == NULL) { error = EBADF; goto out; } #if CONFIG_MACF_SOCKET_SUBSET if ((error = mac_socket_check_getsockopt(kauth_cred_get(), so, &sopt)) != 0) goto out; #endif /* MAC_SOCKET_SUBSET */ error = sogetoptlock((struct socket *)so, &sopt, 1); /* will lock */ if (error == 0) { valsize = sopt.sopt_valsize; error = copyout((caddr_t)&valsize, uap->avalsize, sizeof (valsize)); } out: file_drop(uap->s); return (error); } /* * Get socket name. * * Returns: 0 Success * EBADF * file_socket:ENOTSOCK * file_socket:EBADF * copyin:EFAULT * copyout:EFAULT * :ENOBUFS[TCP] * :ECONNRESET[TCP] * :EINVAL[AF_UNIX] * :??? */ /* ARGSUSED */ int getsockname(__unused struct proc *p, struct getsockname_args *uap, __unused int32_t *retval) { struct socket *so; struct sockaddr *sa; socklen_t len; socklen_t sa_len; int error; error = file_socket(uap->fdes, &so); if (error) return (error); error = copyin(uap->alen, (caddr_t)&len, sizeof (socklen_t)); if (error) goto out; if (so == NULL) { error = EBADF; goto out; } sa = 0; socket_lock(so, 1); error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa); if (error == 0) { error = sflt_getsockname(so, &sa); if (error == EJUSTRETURN) error = 0; } socket_unlock(so, 1); if (error) goto bad; if (sa == 0) { len = 0; goto gotnothing; } sa_len = sa->sa_len; len = MIN(len, sa_len); error = copyout((caddr_t)sa, uap->asa, len); if (error) goto bad; /* return the actual, untruncated address length */ len = sa_len; gotnothing: error = copyout((caddr_t)&len, uap->alen, sizeof (socklen_t)); bad: if (sa) FREE(sa, M_SONAME); out: file_drop(uap->fdes); return (error); } /* * Get name of peer for connected socket. * * Returns: 0 Success * EBADF * EINVAL * ENOTCONN * file_socket:ENOTSOCK * file_socket:EBADF * copyin:EFAULT * copyout:EFAULT * :??? * :??? */ /* ARGSUSED */ int getpeername(__unused struct proc *p, struct getpeername_args *uap, __unused int32_t *retval) { struct socket *so; struct sockaddr *sa; socklen_t len; socklen_t sa_len; int error; error = file_socket(uap->fdes, &so); if (error) return (error); if (so == NULL) { error = EBADF; goto out; } socket_lock(so, 1); if ((so->so_state & (SS_CANTRCVMORE | SS_CANTSENDMORE)) == (SS_CANTRCVMORE | SS_CANTSENDMORE)) { /* the socket has been shutdown, no more getpeername's */ socket_unlock(so, 1); error = EINVAL; goto out; } if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { socket_unlock(so, 1); error = ENOTCONN; goto out; } error = copyin(uap->alen, (caddr_t)&len, sizeof (socklen_t)); if (error) { socket_unlock(so, 1); goto out; } sa = 0; error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa); if (error == 0) { error = sflt_getpeername(so, &sa); if (error == EJUSTRETURN) error = 0; } socket_unlock(so, 1); if (error) goto bad; if (sa == 0) { len = 0; goto gotnothing; } sa_len = sa->sa_len; len = MIN(len, sa_len); error = copyout(sa, uap->asa, len); if (error) goto bad; /* return the actual, untruncated address length */ len = sa_len; gotnothing: error = copyout((caddr_t)&len, uap->alen, sizeof (socklen_t)); bad: if (sa) FREE(sa, M_SONAME); out: file_drop(uap->fdes); return (error); } int sockargs(struct mbuf **mp, user_addr_t data, int buflen, int type) { struct sockaddr *sa; struct mbuf *m; int error; 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); #endif 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 (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 */ m->m_len = buflen; error = copyin(data, mtod(m, caddr_t), (u_int)buflen); if (error) { (void) m_free(m); } else { *mp = m; if (type == MT_SONAME) { sa = mtod(m, struct sockaddr *); sa->sa_len = buflen; } } return (error); } /* * Given a user_addr_t of length len, allocate and fill out a *sa. * * Returns: 0 Success * ENAMETOOLONG Filename too long * EINVAL Invalid argument * ENOMEM Not enough space * copyin:EFAULT Bad address */ static int getsockaddr(struct socket *so, struct sockaddr **namp, user_addr_t uaddr, size_t len, boolean_t translate_unspec) { struct sockaddr *sa; int error; if (len > SOCK_MAXADDRLEN) return (ENAMETOOLONG); if (len < offsetof(struct sockaddr, sa_data[0])) return (EINVAL); MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK | M_ZERO); if (sa == NULL) { return (ENOMEM); } error = copyin(uaddr, (caddr_t)sa, len); if (error) { FREE(sa, M_SONAME); } else { /* * Force sa_family to AF_INET on AF_INET sockets to handle * legacy applications that use AF_UNSPEC (0). On all other * sockets we leave it unchanged and let the lower layer * handle it. */ if (translate_unspec && sa->sa_family == AF_UNSPEC && SOCK_CHECK_DOM(so, PF_INET) && len == sizeof (struct sockaddr_in)) sa->sa_family = AF_INET; sa->sa_len = len; *namp = sa; } return (error); } static int getsockaddr_s(struct socket *so, struct sockaddr_storage *ss, user_addr_t uaddr, size_t len, boolean_t translate_unspec) { int error; if (ss == NULL || uaddr == USER_ADDR_NULL || len < offsetof(struct sockaddr, sa_data[0])) return (EINVAL); /* * sockaddr_storage size is less than SOCK_MAXADDRLEN, * so the check here is inclusive. */ if (len > sizeof (*ss)) return (ENAMETOOLONG); bzero(ss, sizeof (*ss)); error = copyin(uaddr, (caddr_t)ss, len); if (error == 0) { /* * Force sa_family to AF_INET on AF_INET sockets to handle * legacy applications that use AF_UNSPEC (0). On all other * sockets we leave it unchanged and let the lower layer * handle it. */ if (translate_unspec && ss->ss_family == AF_UNSPEC && SOCK_CHECK_DOM(so, PF_INET) && len == sizeof (struct sockaddr_in)) ss->ss_family = AF_INET; ss->ss_len = len; } return (error); } /* * Hard limit on the number of source and/or destination addresses * that can be specified by an application. */ #define SOCKADDRLIST_MAX_ENTRIES 64 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; *slp = NULL; if (uaddr == USER_ADDR_NULL || uaddrlen == 0) return (EINVAL); sl = sockaddrlist_alloc(M_WAITOK); if (sl == NULL) return (ENOMEM); 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 user the * latter instead, but seems like an overkill for now. */ error = ENAMETOOLONG; break; } se = sockaddrentry_alloc(M_WAITOK); if (se == NULL) 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); } #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) >> (PGSHIFT + 2)) + 1) #define HOWMANY_4K(n) ((((unsigned int)(n) - 1) >> PGSHIFT) + 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) size_t mbuf_pkt_maxlen(mbuf_t m); __private_extern__ size_t mbuf_pkt_maxlen(mbuf_t m) { size_t maxlen = 0; while (m) { maxlen += mbuf_maxlen(m); m = mbuf_next(m); } return (maxlen); } static void alloc_sendpkt(int how, size_t pktlen, unsigned int *maxchunks, struct mbuf **m, boolean_t jumbocl) { unsigned int needed; if (pktlen == 0) panic("%s: pktlen (%ld) must be non-zero\n", __func__, pktlen); /* * Try to allocate for the whole thing. Since we want full control * over the buffer size and be able to accept partial result, we can't * use mbuf_allocpacket(). The logic below is similar to sosend(). */ *m = NULL; 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, MBIGCLBYTES); } /* * Our previous attempt(s) at allocation had failed; the system * may be short on mbufs, and we want to block until they are * available. This time, ask just for 1 mbuf and don't return * until we get it. */ if (*m == NULL) { needed = 1; *m = m_getpackets_internal(&needed, 1, M_WAIT, 1, MBIGCLBYTES); } if (*m == NULL) panic("%s: blocking allocation returned NULL\n", __func__); *maxchunks = needed; } /* * sendfile(2). * int sendfile(int fd, int s, off_t offset, off_t *nbytes, * struct sf_hdtr *hdtr, int flags) * * Send a file specified by 'fd' and starting at 'offset' to a socket * specified by 's'. Send only '*nbytes' of the file or until EOF if * *nbytes == 0. Optionally add a header and/or trailer to the socket * output. If specified, write the total number of bytes sent into *nbytes. */ int sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) { struct fileproc *fp; struct vnode *vp; struct socket *so; struct writev_nocancel_args nuap; user_ssize_t writev_retval; struct user_sf_hdtr user_hdtr; struct user32_sf_hdtr user32_hdtr; struct user64_sf_hdtr user64_hdtr; off_t off, xfsize; off_t nbytes = 0, sbytes = 0; int error = 0; size_t sizeof_hdtr; off_t file_size; struct vfs_context context = *vfs_context_current(); #define ENXIO_10146739_DBG(err_str) { \ if (error == ENXIO) { \ printf(err_str, \ __func__, \ "File a radar related to rdar://10146739 \n"); \ } \ } KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE | DBG_FUNC_START), uap->s, 0, 0, 0, 0); AUDIT_ARG(fd, uap->fd); AUDIT_ARG(value32, uap->s); /* * Do argument checking. Must be a regular file in, stream * type and connected socket out, positive offset. */ if ((error = fp_getfvp(p, uap->fd, &fp, &vp))) { ENXIO_10146739_DBG("%s: fp_getfvp error. %s"); goto done; } if ((fp->f_flag & FREAD) == 0) { error = EBADF; goto done1; } if (vnode_isreg(vp) == 0) { error = ENOTSUP; goto done1; } error = file_socket(uap->s, &so); if (error) { ENXIO_10146739_DBG("%s: file_socket error. %s"); goto done1; } if (so == NULL) { error = EBADF; goto done2; } if (so->so_type != SOCK_STREAM) { error = EINVAL; goto done2; } if ((so->so_state & SS_ISCONNECTED) == 0) { error = ENOTCONN; goto done2; } if (uap->offset < 0) { error = EINVAL; goto done2; } if (uap->nbytes == USER_ADDR_NULL) { error = EINVAL; goto done2; } if (uap->flags != 0) { error = EINVAL; goto done2; } context.vc_ucred = fp->f_fglob->fg_cred; #if CONFIG_MACF_SOCKET_SUBSET /* JMM - fetch connected sockaddr? */ error = mac_socket_check_send(context.vc_ucred, so, NULL); if (error) goto done2; #endif /* * Get number of bytes to send * Should it applies to size of header and trailer? * JMM - error handling? */ copyin(uap->nbytes, &nbytes, sizeof (off_t)); /* * If specified, get the pointer to the sf_hdtr struct for * any headers/trailers. */ if (uap->hdtr != USER_ADDR_NULL) { caddr_t hdtrp; bzero(&user_hdtr, sizeof (user_hdtr)); if (IS_64BIT_PROCESS(p)) { hdtrp = (caddr_t)&user64_hdtr; sizeof_hdtr = sizeof (user64_hdtr); } else { hdtrp = (caddr_t)&user32_hdtr; sizeof_hdtr = sizeof (user32_hdtr); } error = copyin(uap->hdtr, hdtrp, sizeof_hdtr); if (error) goto done2; if (IS_64BIT_PROCESS(p)) { user_hdtr.headers = user64_hdtr.headers; user_hdtr.hdr_cnt = user64_hdtr.hdr_cnt; user_hdtr.trailers = user64_hdtr.trailers; user_hdtr.trl_cnt = user64_hdtr.trl_cnt; } else { user_hdtr.headers = user32_hdtr.headers; user_hdtr.hdr_cnt = user32_hdtr.hdr_cnt; user_hdtr.trailers = user32_hdtr.trailers; user_hdtr.trl_cnt = user32_hdtr.trl_cnt; } /* * Send any headers. Wimp out and use writev(2). */ if (user_hdtr.headers != USER_ADDR_NULL) { bzero(&nuap, sizeof (struct writev_args)); nuap.fd = uap->s; nuap.iovp = user_hdtr.headers; nuap.iovcnt = user_hdtr.hdr_cnt; error = writev_nocancel(p, &nuap, &writev_retval); if (error) { ENXIO_10146739_DBG("%s: writev_nocancel error. %s"); goto done2; } sbytes += writev_retval; } } /* * Get the file size for 2 reasons: * 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) { ENXIO_10146739_DBG("%s: vnode_size error. %s"); goto done2; } /* * Simply read file data into a chain of mbufs that used with scatter * gather reads. We're not (yet?) setup to use zero copy external * mbufs that point to the file pages. */ socket_lock(so, 1); 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 = SFUIOBUFS, i; uio_t auio; char uio_buf[UIO_SIZEOF(SFUIOBUFS)]; /* 1 KB !!! */ size_t uiolen; user_ssize_t rlen; off_t pgoff; size_t pktlen; boolean_t jumbocl; /* * Calculate the amount to transfer. * Align to round number of pages. * Not to exceed send socket buffer, * the EOF, or the passed in nbytes. */ xfsize = sbspace(&so->so_snd); if (xfsize <= 0) { if (so->so_state & SS_CANTSENDMORE) { error = EPIPE; goto done3; } else if ((so->so_state & SS_NBIO)) { error = EAGAIN; goto done3; } else { xfsize = PAGE_SIZE; } } if (xfsize > SENDFILE_MAX_BYTES) xfsize = SENDFILE_MAX_BYTES; else if (xfsize > PAGE_SIZE) xfsize = trunc_page(xfsize); pgoff = off & PAGE_MASK_64; if (pgoff > 0 && PAGE_SIZE - pgoff < xfsize) xfsize = PAGE_SIZE_64 - pgoff; if (nbytes && xfsize > (nbytes - sbytes)) xfsize = nbytes - sbytes; if (xfsize <= 0) break; if (off + xfsize > file_size) xfsize = file_size - off; if (xfsize <= 0) break; /* * 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); alloc_sendpkt(M_WAIT, xfsize, &nbufs, &m0, jumbocl); pktlen = mbuf_pkt_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 failed. nbufs = %d. %s", nbufs, "File a radar related to rdar://10146739.\n"); mbuf_freem(m0); error = ENXIO; socket_lock(so, 0); goto done3; } for (i = 0, m = m0, uiolen = 0; i < nbufs && m != NULL && uiolen < (size_t)xfsize; i++, m = mbuf_next(m)) { size_t mlen = mbuf_maxlen(m); if (mlen + uiolen > (size_t)xfsize) mlen = xfsize - uiolen; mbuf_setlen(m, mlen); uio_addiov(auio, CAST_USER_ADDR_T(mbuf_datastart(m)), mlen); uiolen += mlen; } if (xfsize != uio_resid(auio)) printf("sendfile: xfsize: %lld != 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), (unsigned int)(xfsize & 0x0ffffffff), 0, 0); error = fo_read(fp, auio, FOF_OFFSET, &context); socket_lock(so, 0); if (error != 0) { if (uio_resid(auio) != xfsize && (error == ERESTART || error == EINTR || error == EWOULDBLOCK)) { error = 0; } else { ENXIO_10146739_DBG("%s: fo_read error. %s"); mbuf_freem(m0); goto done3; } } xfsize -= uio_resid(auio); KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_READ | DBG_FUNC_END), uap->s, (unsigned int)((xfsize >> 32) & 0x0ffffffff), (unsigned int)(xfsize & 0x0ffffffff), 0, 0); if (xfsize == 0) { //printf("sendfile: fo_read 0 bytes, EOF\n"); break; } if (xfsize + off > file_size) printf("sendfile: xfsize: %lld + off: %lld > file_size:" "%lld\n", xfsize, off, file_size); for (i = 0, m = m0, rlen = 0; i < nbufs && m != NULL && rlen < xfsize; i++, m = mbuf_next(m)) { size_t mlen = mbuf_maxlen(m); if (rlen + mlen > (size_t)xfsize) mlen = xfsize - rlen; mbuf_setlen(m, mlen); rlen += mlen; } mbuf_pkthdr_setlen(m0, xfsize); retry_space: /* * Make sure that the socket is still able to take more data. * CANTSENDMORE being true usually means that the connection * was closed. so_error is true when an error was sensed after * a previous send. * The state is checked after the page mapping and buffer * allocation above since those operations may block and make * any socket checks stale. From this point forward, nothing * blocks before the pru_send (or more accurately, any blocking * results in a loop back to here to re-check). */ if ((so->so_state & SS_CANTSENDMORE) || so->so_error) { if (so->so_state & SS_CANTSENDMORE) { error = EPIPE; } else { error = so->so_error; so->so_error = 0; } m_freem(m0); ENXIO_10146739_DBG("%s: Unexpected socket error. %s"); goto done3; } /* * Wait for socket space to become available. We do this just * after checking the connection state above in order to avoid * a race condition with sbwait(). */ if (sbspace(&so->so_snd) < (long)so->so_snd.sb_lowat) { if (so->so_state & SS_NBIO) { m_freem(m0); error = EAGAIN; goto done3; } KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_WAIT | DBG_FUNC_START), uap->s, 0, 0, 0, 0); error = sbwait(&so->so_snd); KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_WAIT| DBG_FUNC_END), uap->s, 0, 0, 0, 0); /* * An error from sbwait usually indicates that we've * been interrupted by a signal. If we've sent anything * then return bytes sent, otherwise return the error. */ if (error) { m_freem(m0); goto done3; } goto retry_space; } struct mbuf *control = NULL; { /* * Socket filter processing */ error = sflt_data_out(so, NULL, &m0, &control, 0); if (error) { if (error == EJUSTRETURN) { error = 0; continue; } ENXIO_10146739_DBG("%s: sflt_data_out error. %s"); goto done3; } /* * End Socket filter processing */ } 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, control, p); KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE_SEND | DBG_FUNC_START), uap->s, 0, 0, 0, 0); if (error) { ENXIO_10146739_DBG("%s: pru_send error. %s"); goto done3; } } sbunlock(&so->so_snd, FALSE); /* will unlock socket */ /* * Send trailers. Wimp out and use writev(2). */ if (uap->hdtr != USER_ADDR_NULL && user_hdtr.trailers != USER_ADDR_NULL) { bzero(&nuap, sizeof (struct writev_args)); nuap.fd = uap->s; nuap.iovp = user_hdtr.trailers; nuap.iovcnt = user_hdtr.trl_cnt; error = writev_nocancel(p, &nuap, &writev_retval); if (error) { ENXIO_10146739_DBG("%s: writev_nocancel error. %s"); goto done2; } sbytes += writev_retval; } done2: file_drop(uap->s); done1: file_drop(uap->fd); done: if (uap->nbytes != USER_ADDR_NULL) { /* XXX this appears bogus for some early failure conditions */ copyout(&sbytes, uap->nbytes, sizeof (off_t)); } KERNEL_DEBUG_CONSTANT((DBG_FNC_SENDFILE | DBG_FUNC_END), uap->s, (unsigned int)((sbytes >> 32) & 0x0ffffffff), (unsigned int)(sbytes & 0x0ffffffff), error, 0); return (error); done3: sbunlock(&so->so_snd, FALSE); /* will unlock socket */ goto done2; } #endif /* SENDFILE */