X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/5d5c5d0d5b79ade9a973d55186ffda2638ba2b6e..15129b1c8dbb3650c63b70adb1cad9af601c6c17:/bsd/kern/uipc_syscalls.c diff --git a/bsd/kern/uipc_syscalls.c b/bsd/kern/uipc_syscalls.c index 24d4e37e5..09f0e4f4a 100644 --- a/bsd/kern/uipc_syscalls.c +++ b/bsd/kern/uipc_syscalls.c @@ -1,38 +1,36 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2013 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_OSREFERENCE_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. + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * 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. * - * 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 + * 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_LICENSE_OSREFERENCE_HEADER_END@ + * @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. + * 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 @@ -64,15 +62,21 @@ * * @(#)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 @@ -80,140 +84,159 @@ #include #include #include -#if KTRACE -#include -#endif #include #include +#include +#include +#include -#include +#include #include #include - -#define f_flag f_fglob->fg_flag -#define f_type f_fglob->fg_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 -#if KDEBUG - -#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)) - -#endif - - -#define HACK_FOR_4056224 1 -#if HACK_FOR_4056224 -static pid_t last_pid_4056224 = 0; -#endif /* HACK_FOR_4056224 */ - - +#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 sf_buf_init(void *arg); -SYSINIT(sock_sf, SI_SUB_MBUF, SI_ORDER_ANY, sf_buf_init, NULL) -static struct sf_buf *sf_buf_alloc(void); -static void sf_buf_ref(caddr_t addr, u_int size); -static void sf_buf_free(caddr_t addr, u_int size); - -static SLIST_HEAD(, sf_buf) sf_freelist; -static vm_offset_t sf_base; -static struct sf_buf *sf_bufs; -static int sf_buf_alloc_want; -#endif - -static int sendit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, - int flags, register_t *retval); -static int recvit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, - user_addr_t namelenp, register_t *retval); - -static int accept1(struct proc *p, struct accept_args *uap, register_t *retval, int compat); -static int getsockname1(struct proc *p, struct getsockname_args *uap, - register_t *retval, int compat); -static int getpeername1(struct proc *p, struct getpeername_args *uap, - register_t *retval, int compat); - - -#if COMPAT_43_SOCKET -struct orecvmsg_args { - int s; - struct omsghdr *msg; - int flags; -}; -struct osendmsg_args { - int s; - caddr_t msg; - int flags; -}; -struct osend_args { - int s; - caddr_t buf; - int len; - int flags; -}; -struct orecv_args { - int s; - caddr_t buf; - int len; - int flags; -}; - -int oaccept(struct proc *p, struct accept_args *uap, register_t *retval); -int ogetpeername(struct proc *p, struct getpeername_args *uap, register_t *retval); -int ogetsockname(struct proc *p, struct getsockname_args *uap, register_t *retval); -int orecv(struct proc *p, struct orecv_args *uap, register_t *retval); -int orecvfrom(struct proc *p, struct recvfrom_args *uap, register_t *retval); -int orecvmsg(struct proc *p, struct orecvmsg_args *uap, register_t *retval); -int osend(struct proc *p, struct osend_args *uap, register_t *retval); -int osendmsg(struct proc *p, struct osendmsg_args *uap, register_t *retval); -#endif // COMPAT_43_SOCKET +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 struct fileops socketops; +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(p, uap, retval) - struct proc *p; - register struct socket_args *uap; - register_t *retval; +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(), 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); + 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 { fp->f_data = (caddr_t)so; proc_fdlock(p); - *fdflags(p, fd) &= ~UF_RESERVED; - + procfdtbl_releasefd(p, fd, NULL); + fp_drop(p, fd, fp, 1); proc_fdunlock(p); @@ -222,77 +245,144 @@ socket(p, uap, retval) 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(struct proc *p, struct bind_args *uap, __unused register_t *retval) +bind(__unused proc_t p, struct bind_args *uap, __unused int32_t *retval) { - struct sockaddr *sa; + 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) + if (error != 0) return (error); - error = getsockaddr(&sa, uap->name, uap->namelen); - if (error) - goto out; - AUDIT_ARG(sockaddr, p, sa); - if (so != NULL) - error = sobind(so, sa); - else + if (so == NULL) { error = EBADF; - FREE(sa, M_SONAME); + 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, register struct listen_args *uap, - __unused register_t *retval) +listen(__unused struct proc *p, struct listen_args *uap, + __unused int32_t *retval) { int error; - struct socket * so; + 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); } -#if !COMPAT_43_SOCKET -#define accept1 accept -#endif - - - +/* + * 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 -accept1(struct proc *p, struct accept_args *uap, register_t *retval, int compat) +accept_nocancel(struct proc *p, struct accept_nocancel_args *uap, + int32_t *retval) { struct fileproc *fp; - struct sockaddr *sa; + 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;; + 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) + sizeof (socklen_t)); + if (error) return (error); } error = fp_getfsock(p, fd, &fp, &head); @@ -305,22 +395,29 @@ accept1(struct proc *p, struct accept_args *uap, register_t *retval, int compat) 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 { + } 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); - error = EINVAL; goto out; } if ((head->so_state & SS_NBIO) && head->so_comp.tqh_first == NULL) { @@ -328,17 +425,19 @@ accept1(struct proc *p, struct accept_args *uap, register_t *retval, int compat) error = EWOULDBLOCK; goto out; } - while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) { + 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("accept1: head=%x refcount=%d\n", head, head->so_usecount); - error = msleep((caddr_t)&head->so_timeo, mutex_held, PSOCK | PCATCH, - "accept", 0); + 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("accept1: 2 head=%x refcount=%d\n", head, head->so_usecount); + panic("accept: 2 head=%p refcount=%d\n", head, + head->so_usecount); if ((head->so_state & SS_DRAINING)) { error = ECONNABORTED; } @@ -366,351 +465,730 @@ accept1(struct proc *p, struct accept_args *uap, register_t *retval, int compat) so = TAILQ_FIRST(&head->so_comp); TAILQ_REMOVE(&head->so_comp, so, so_list); head->so_qlen--; - socket_unlock(head, 0); /* unlock head to avoid deadlock with select, keep a ref on head */ + /* 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; - proc_fdlock(p); - error = falloc_locked(p, &fp, &newfd, 1); + 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. */ - proc_fdunlock(p); - 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 | SS_COMP); + so->so_head = NULL; + socket_unlock(so, 1); + soclose(so); + sodereference(head); goto out; - } - *fdflags(p, newfd) &= ~UF_RESERVED; + } *retval = newfd; - fp->f_type = DTYPE_SOCKET; fp->f_flag = fflag; fp->f_ops = &socketops; fp->f_data = (caddr_t)so; - fp_drop(p, newfd, fp, 1); - proc_fdunlock(p); socket_lock(head, 0); if (dosocklock) socket_lock(so, 1); so->so_state &= ~SS_COMP; so->so_head = NULL; - sa = 0; (void) soacceptlock(so, &sa, 0); socket_unlock(head, 1); - if (sa == 0) { + if (sa == NULL) { namelen = 0; if (uap->name) goto gotnoname; - if (dosocklock) - socket_unlock(so, 1); error = 0; - goto out; + goto releasefd; } - AUDIT_ARG(sockaddr, p, sa); + AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), sa); + if (uap->name) { - /* check sa_len before it is destroyed */ - if (namelen > sa->sa_len) - namelen = sa->sa_len; -#if COMPAT_43_SOCKET - if (compat) - ((struct osockaddr *)sa)->sa_family = - sa->sa_family; -#endif + 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)); + 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, register_t *retval) +accept(struct proc *p, struct accept_args *uap, int32_t *retval) { - - return (accept1(p, uap, retval, 0)); + __pthread_testcancel(1); + return(accept_nocancel(p, (struct accept_nocancel_args *)uap, retval)); } -#if COMPAT_43_SOCKET +/* + * 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 -oaccept(struct proc *p, struct accept_args *uap, register_t *retval) +connect(struct proc *p, struct connect_args *uap, int32_t *retval) { - - return (accept1(p, uap, retval, 1)); + __pthread_testcancel(1); + return(connect_nocancel(p, (struct connect_nocancel_args *)uap, retval)); } -#endif /* COMPAT_43_SOCKET */ -/* ARGSUSED */ int -connect(struct proc *p, struct connect_args *uap, __unused register_t *retval) +connect_nocancel(proc_t p, struct connect_nocancel_args *uap, int32_t *retval) { +#pragma unused(p, retval) struct socket *so; - struct sockaddr *sa; - lck_mtx_t *mutex_held; + 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) + error = file_socket(fd, &so); + if (error != 0) return (error); if (so == NULL) { error = EBADF; goto out; } - socket_lock(so, 1); + /* + * 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)) { - socket_unlock(so, 1); error = EALREADY; goto out; } - error = getsockaddr(&sa, uap->name, uap->namelen); - if (error) { - socket_unlock(so, 1); + error = soconnectlock(so, sa, 0); + if (error != 0) { + so->so_state &= ~SS_ISCONNECTING; goto out; } - AUDIT_ARG(sockaddr, p, sa); - error = soconnectlock(so, sa, 0); - if (error) - goto bad; if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { - FREE(sa, M_SONAME); - socket_unlock(so, 1); error = EINPROGRESS; goto out; } while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { - if (so->so_proto->pr_getlock != NULL) + lck_mtx_t *mutex_held; + + if (so->so_proto->pr_getlock != NULL) mutex_held = (*so->so_proto->pr_getlock)(so, 0); - else + else mutex_held = so->so_proto->pr_domain->dom_mtx; - error = msleep((caddr_t)&so->so_timeo, mutex_held, PSOCK | PCATCH, - "connec", 0); - if ((so->so_state & SS_DRAINING)) { + error = msleep((caddr_t)&so->so_timeo, mutex_held, + 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); - FREE(sa, M_SONAME); - if (error == ERESTART) - error = EINTR; out: - file_drop(fd); + socket_unlock(so, 1); return (error); } -int -socketpair(struct proc *p, struct socketpair_args *uap, __unused register_t *retval) +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 fileproc *fp1, *fp2; - struct socket *so1, *so2; - int fd, error, sv[2]; + struct sockaddr_entry *se; + int error; - 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); - 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); - 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; + 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 (uap->type == SOCK_DGRAM) { - /* - * Datagram socket connection is asymmetric. - */ - error = soconnect2(so2, so1); - if (error) { - goto free4; - } + 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; - proc_fdlock(p); - *fdflags(p, sv[0]) &= ~UF_RESERVED; - *fdflags(p, sv[1]) &= ~UF_RESERVED; - 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)); -#if 0 /* old pipe(2) syscall compatability, unused these days */ - retval[0] = sv[0]; /* XXX ??? */ - retval[1] = sv[1]; /* XXX ??? */ -#endif /* 0 */ - return (error); -free4: - fp_free(p, sv[1], fp2); -free3: - fp_free(p, sv[0], fp1); + 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); + (void) soclose(so2); free1: - (void)soclose(so1); + (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, register_t *retval) +sendit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, + int flags, int32_t *retval) { - struct mbuf *control; - struct sockaddr *to; + 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; -#if KTRACE - uio_t ktruio = NULL; -#endif - - KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_START, 0,0,0,0,0); + + 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 (error) { + KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_END, error, 0, 0, 0, 0); + return (error); } - - if (mp->msg_name) { - error = getsockaddr(&to, mp->msg_name, mp->msg_namelen); - if (error) { - KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_END, error,0,0,0,0); - goto out; + 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; + } } - AUDIT_ARG(sockaddr, p, to); - } else { - to = 0; + if (error != 0) + goto out; + AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), to); } - if (mp->msg_control) { - if (mp->msg_controllen < ((socklen_t)sizeof(struct cmsghdr)) -#if COMPAT_43_SOCKET - && !(mp->msg_flags & MSG_COMPAT) -#endif - ) { + 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) + if (error != 0) goto bad; -#if COMPAT_43_SOCKET - if (mp->msg_flags & MSG_COMPAT) { - register struct cmsghdr *cm; - - M_PREPEND(control, sizeof(*cm), M_WAIT); - if (control == 0) { - error = ENOBUFS; - goto bad; - } else { - cm = mtod(control, struct cmsghdr *); - cm->cmsg_len = control->m_len; - cm->cmsg_level = SOL_SOCKET; - cm->cmsg_type = SCM_RIGHTS; - } - } -#endif - } else { - control = 0; } -#if KTRACE - if (KTRPOINT(p, KTR_GENIO)) { - ktruio = uio_duplicate(uiop); - } -#endif +#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); - if (so == NULL) - error = EBADF; - else - error = so->so_proto->pr_usrreqs->pru_sosend(so, to, uiop, 0, control, - flags); - if (error) { + 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 */ + /* 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 KTRACE - if (ktruio != NULL) { - if (error == 0) { - uio_setresid(ktruio, retval[0]); - ktrgenio(p->p_tracep, s, UIO_WRITE, ktruio, error); - } - uio_free(ktruio); - } -#endif - if (to) + if (to != NULL && want_free) FREE(to, M_SONAME); - KERNEL_DEBUG(DBG_FNC_SENDIT | DBG_FUNC_END, error,0,0,0,0); 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(struct proc *p, struct sendto_args *uap, register_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; - KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_START, 0,0,0,0,0); + 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); + (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), + UIO_WRITE); if (auio == NULL) { return (ENOMEM); } @@ -725,291 +1203,244 @@ sendto(struct proc *p, struct sendto_args *uap, register_t *retval) msg.msg_flags = 0; error = sendit(p, uap->s, &msg, auio, uap->flags, retval); - + if (auio != NULL) { 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) { - 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 */ - KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_END, error, *retval,0,0,0); - - return(error); -} + KERNEL_DEBUG(DBG_FNC_SENDTO | DBG_FUNC_END, error, *retval, 0, 0, 0); -#if COMPAT_43_SOCKET -int -osend(__unused struct proc *p, - __unused struct osend_args *uap, - __unused register_t *retval) -{ - /* these are no longer supported and in fact - * there is no way to call it directly. - * LP64todo - remove this once we're sure there are no clients - */ - return (ENOTSUP); + return (error); } +/* + * Returns: 0 Success + * ENOBUFS + * copyin:EFAULT + * sendit:??? [see sendit definition in this file] + */ int -osendmsg(__unused struct proc *p, - __unused struct osendmsg_args *uap, - __unused register_t *retval) +sendmsg(struct proc *p, struct sendmsg_args *uap, int32_t *retval) { - /* these are no longer supported and in fact - * there is no way to call it directly. - * LP64todo - remove this once we're sure there are no clients - */ - return (ENOTSUP); + __pthread_testcancel(1); + return (sendmsg_nocancel(p, (struct sendmsg_nocancel_args *)uap, retval)); } -#endif - int -sendmsg(struct proc *p, register struct sendmsg_args *uap, register_t *retval) +sendmsg_nocancel(struct proc *p, struct sendmsg_nocancel_args *uap, int32_t *retval) { - struct msghdr msg; + struct user32_msghdr msg32; + struct user64_msghdr msg64; struct user_msghdr user_msg; caddr_t msghdrp; int size_of_msghdr; int error; - int size_of_iovec; uio_t auio = NULL; struct user_iovec *iovp; - KERNEL_DEBUG(DBG_FNC_SENDMSG | DBG_FUNC_START, 0,0,0,0,0); + 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) &user_msg; - size_of_msghdr = sizeof(user_msg); - size_of_iovec = sizeof(struct user_iovec); - } - else { - msghdrp = (caddr_t) &msg; - size_of_msghdr = sizeof(msg); - size_of_iovec = sizeof(struct iovec); + 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 (error) { + KERNEL_DEBUG(DBG_FNC_SENDMSG | 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 = msg.msg_flags; - user_msg.msg_controllen = msg.msg_controllen; - user_msg.msg_control = CAST_USER_ADDR_T(msg.msg_control); - user_msg.msg_iovlen = msg.msg_iovlen; - user_msg.msg_iov = CAST_USER_ADDR_T(msg.msg_iov); - user_msg.msg_namelen = msg.msg_namelen; - user_msg.msg_name = CAST_USER_ADDR_T(msg.msg_name); + 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); + 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); + (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. + /* + * 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_msg.msg_iov, (caddr_t)iovp, (user_msg.msg_iovlen * size_of_iovec)); + 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 */ - uio_calculateresid(auio); - } - else { + + /* finish setup of uio_t */ + error = uio_calculateresid(auio); + if (error) { + goto done; + } + } else { user_msg.msg_iov = 0; } - -#if COMPAT_43_SOCKET + + /* msg_flags is ignored for send */ user_msg.msg_flags = 0; -#endif + 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); + 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(p, s, mp, uiop, namelenp, retval) - register struct proc *p; - int s; - register struct user_msghdr *mp; - uio_t uiop; - user_addr_t namelenp; - register_t *retval; +recvit(struct proc *p, int s, struct user_msghdr *mp, uio_t uiop, + user_addr_t namelenp, int32_t *retval) { - int len, error; + ssize_t len; + int error; struct mbuf *m, *control = 0; user_addr_t ctlbuf; struct socket *so; struct sockaddr *fromsa = 0; struct fileproc *fp; -#if KTRACE - uio_t ktruio = NULL; -#endif - KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_START, 0,0,0,0,0); + 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); + 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); + return (error); } if (fp->f_type != DTYPE_SOCKET) { - fp_drop(p, s, fp,1); + fp_drop(p, s, fp, 1); proc_fdunlock(p); - return(ENOTSOCK); + return (ENOTSOCK); } - so = (struct socket *)fp->f_data; + 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); + KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_END, EINVAL, 0, 0, 0, 0); error = EINVAL; goto out1; } -#if KTRACE - if (KTRPOINT(p, KTR_GENIO)) { - ktruio = uio_duplicate(uiop); - } -#endif len = uio_resid(uiop); - if (so == NULL) - error = EBADF; - else { - error = so->so_proto->pr_usrreqs->pru_soreceive(so, &fromsa, uiop, - (struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0, - &mp->msg_flags); - } - AUDIT_ARG(sockaddr, p, fromsa); + 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 KTRACE - if (ktruio != NULL) { - if (error == 0) { - uio_setresid(ktruio, len - uio_resid(uiop)); - ktrgenio(p->p_tracep, s, UIO_WRITE, ktruio, error); - } - uio_free(ktruio); - } -#endif + 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) + if (len <= 0 || fromsa == 0) { len = 0; - else { + } else { #ifndef MIN -#define MIN(a,b) ((a)>(b)?(b):(a)) -#endif - /* save sa_len before it is destroyed by MSG_COMPAT */ - len = MIN(len, fromsa->sa_len); -#if COMPAT_43_SOCKET - if (mp->msg_flags & MSG_COMPAT) - ((struct osockaddr *)fromsa)->sa_family = - fromsa->sa_family; +#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 = len; + mp->msg_namelen = sa_len; + /* return the actual, untruncated address length */ if (namelenp && - (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) { -#if COMPAT_43_SOCKET - if (mp->msg_flags & MSG_COMPAT) - error = 0; /* old recvfrom didn't check */ - else -#endif + (error = copyout((caddr_t)&sa_len, namelenp, + sizeof (int)))) { goto out; } } if (mp->msg_control) { -#if COMPAT_43_SOCKET - /* - * We assume that old recvmsg calls won't receive access - * rights and other control info, esp. as control info - * is always optional and those options didn't exist in 4.3. - * If we receive rights, trim the cmsghdr; anything else - * is tossed. - */ - if (control && mp->msg_flags & MSG_COMPAT) { - if (mtod(control, struct cmsghdr *)->cmsg_level != - SOL_SOCKET || - mtod(control, struct cmsghdr *)->cmsg_type != - SCM_RIGHTS) { - mp->msg_controllen = 0; - goto out; - } - control->m_len -= sizeof (struct cmsghdr); - control->m_data += sizeof (struct cmsghdr); - } -#endif len = mp->msg_controllen; m = control; mp->msg_controllen = 0; @@ -1017,20 +1448,80 @@ recvit(p, s, mp, uiop, namelenp, retval) 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; - if (len >= m->m_len) - tocopy = m->m_len; - else { - mp->msg_flags |= MSG_CTRUNC; - tocopy = len; + buflen -= cp_size; + cp = (struct cmsghdr *)(void *)((unsigned char *) cp + cp_size); + cp_size = CMSG_ALIGN(cp->cmsg_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; @@ -1040,31 +1531,42 @@ out: FREE(fromsa, M_SONAME); if (control) m_freem(control); - KERNEL_DEBUG(DBG_FNC_RECVIT | DBG_FUNC_END, error,0,0,0,0); + 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(p, uap, retval) - struct proc *p; - register struct recvfrom_args /* { - int s; - caddr_t buf; - size_t len; - int flags; - caddr_t from; - int *fromlenaddr; - } */ *uap; - register_t *retval; +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); + KERNEL_DEBUG(DBG_FNC_RECVFROM | DBG_FUNC_START, 0, 0, 0, 0, 0); AUDIT_ARG(fd, uap->s); if (uap->fromlenaddr) { @@ -1072,16 +1574,17 @@ recvfrom(p, uap, retval) (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen)); if (error) return (error); - } else + } 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); + (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; @@ -1093,157 +1596,96 @@ recvfrom(p, uap, retval) if (auio != NULL) { 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); -} - -#if COMPAT_43_SOCKET -int -orecvfrom(struct proc *p, struct recvfrom_args *uap, register_t *retval) -{ - - uap->flags |= MSG_COMPAT; - return (recvfrom(p, uap, retval)); -} -#endif - -#if COMPAT_43_SOCKET -int -orecv(__unused struct proc *p, __unused struct orecv_args *uap, - __unused register_t *retval) -{ - /* these are no longer supported and in fact - * there is no way to call it directly. - * LP64todo - remove this once we're sure there are no clients - */ + KERNEL_DEBUG(DBG_FNC_RECVFROM | DBG_FUNC_END, error, 0, 0, 0, 0); - return (ENOTSUP); + return (error); } /* - * Old recvmsg. This code takes advantage of the fact that the old msghdr - * overlays the new one, missing only the flags, and with the (old) access - * rights where the control fields are now. + * 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 -orecvmsg(__unused struct proc *p, __unused struct orecvmsg_args *uap, - __unused register_t *retval) +recvmsg(struct proc *p, struct recvmsg_args *uap, int32_t *retval) { - /* these are no longer supported and in fact - * there is no way to call it directly. - * LP64todo - remove this once we're sure there are no clients - */ - - return (ENOTSUP); - + __pthread_testcancel(1); + return(recvmsg_nocancel(p, (struct recvmsg_nocancel_args *)uap, retval)); } -#endif int -recvmsg(p, uap, retval) - struct proc *p; - struct recvmsg_args *uap; - register_t *retval; +recvmsg_nocancel(struct proc *p, struct recvmsg_nocancel_args *uap, int32_t *retval) { - struct msghdr msg; + struct user32_msghdr msg32; + struct user64_msghdr msg64; struct user_msghdr user_msg; caddr_t msghdrp; int size_of_msghdr; user_addr_t uiov; - register int error; - int size_of_iovec; + int error; uio_t auio = NULL; struct user_iovec *iovp; - KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_START, 0,0,0,0,0); + 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) &user_msg; - size_of_msghdr = sizeof(user_msg); - size_of_iovec = sizeof(struct user_iovec); - } - else { - msghdrp = (caddr_t) &msg; - size_of_msghdr = sizeof(msg); - size_of_iovec = sizeof(struct iovec); + 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); + 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 = msg.msg_flags; - user_msg.msg_controllen = msg.msg_controllen; - user_msg.msg_control = CAST_USER_ADDR_T(msg.msg_control); - user_msg.msg_iovlen = msg.msg_iovlen; - user_msg.msg_iov = CAST_USER_ADDR_T(msg.msg_iov); - user_msg.msg_namelen = msg.msg_namelen; - user_msg.msg_name = CAST_USER_ADDR_T(msg.msg_name); + 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); + KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_END, EMSGSIZE, + 0, 0, 0, 0); return (EMSGSIZE); } -#if COMPAT_43_SOCKET - user_msg.msg_flags = uap->flags &~ MSG_COMPAT; -#else user_msg.msg_flags = uap->flags; -#endif /* 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); + (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 + /* + * get location of iovecs within the uio. then copyin the iovecs from * user space. */ iovp = uio_iovsaddr(auio); @@ -1253,26 +1695,37 @@ recvmsg(p, uap, retval) } uiov = user_msg.msg_iov; user_msg.msg_iov = CAST_USER_ADDR_T(iovp); - error = copyin(uiov, (caddr_t)iovp, (user_msg.msg_iovlen * size_of_iovec)); + 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 */ - uio_calculateresid(auio); - + /* 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; - /* only need to copy if user process is not 64-bit */ - if (!IS_64BIT_PROCESS(p)) { - // LP64todo - do all these change? if not, then no need to copy all of them! - msg.msg_flags = user_msg.msg_flags; - msg.msg_controllen = user_msg.msg_controllen; - msg.msg_control = CAST_DOWN(caddr_t, user_msg.msg_control); - msg.msg_iovlen = user_msg.msg_iovlen; - msg.msg_iov = (struct iovec *) CAST_DOWN(caddr_t, user_msg.msg_iov); - msg.msg_namelen = user_msg.msg_namelen; - msg.msg_name = CAST_DOWN(caddr_t, user_msg.msg_name); + 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); } @@ -1280,15 +1733,36 @@ done: if (auio != NULL) { uio_free(auio); } - KERNEL_DEBUG(DBG_FNC_RECVMSG | DBG_FUNC_END, error,0,0,0,0); + 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 register_t *retval) +shutdown(__unused struct proc *p, struct shutdown_args *uap, + __unused int32_t *retval) { - struct socket * so; + struct socket *so; int error; AUDIT_ARG(fd, uap->s); @@ -1302,26 +1776,37 @@ shutdown(__unused struct proc *p, struct shutdown_args *uap, __unused register_t error = soshutdown((struct socket *)so, uap->how); out: file_drop(uap->s); - return(error); + 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 register_t *retval) +setsockopt(struct proc *p, struct setsockopt_args *uap, + __unused int32_t *retval) { - struct socket * so; + struct socket *so; struct sockopt sopt; int error; AUDIT_ARG(fd, uap->s); if (uap->val == 0 && uap->valsize != 0) return (EFAULT); - if (uap->valsize < 0) - return (EINVAL); + /* No bounds checking on size (it's unsigned) */ error = file_socket(uap->s, &so); if (error) @@ -1338,36 +1823,51 @@ setsockopt(struct proc *p, struct setsockopt_args *uap, __unused register_t *ret error = EINVAL; goto out; } - error = sosetopt(so, &sopt); +#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); + 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 register_t *retval) +getsockopt(struct proc *p, struct getsockopt_args *uap, + __unused int32_t *retval) { int error; socklen_t valsize; struct sockopt sopt; - struct socket * so; + 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)); + error = copyin(uap->avalsize, (caddr_t)&valsize, + sizeof (valsize)); if (error) goto out; - if (valsize < 0) { - error = EINVAL; - goto out; - } - } else + /* 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; @@ -1379,10 +1879,16 @@ getsockopt(struct proc *p, struct getsockopt_args *uap, __unused register_t *re error = EBADF; goto out; } - error = sogetopt((struct socket *)so, &sopt); +#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)); + error = copyout((caddr_t)&valsize, uap->avalsize, + sizeof (valsize)); } out: file_drop(uap->s); @@ -1392,21 +1898,33 @@ out: /* * 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 */ -static int -getsockname1(__unused struct proc *p, struct getsockname_args *uap, __unused register_t *retval, - int compat) +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)); + error = copyin(uap->alen, (caddr_t)&len, sizeof (socklen_t)); if (error) goto out; if (so == NULL) { @@ -1416,30 +1934,10 @@ getsockname1(__unused struct proc *p, struct getsockname_args *uap, __unused reg sa = 0; 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); - } - } - + if (error == 0) { + 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) @@ -1449,15 +1947,15 @@ getsockname1(__unused struct proc *p, struct getsockname_args *uap, __unused reg goto gotnothing; } - len = MIN(len, sa->sa_len); -#if COMPAT_43_SOCKET - if (compat) - ((struct osockaddr *)sa)->sa_family = sa->sa_family; -#endif + sa_len = sa->sa_len; + len = MIN(len, sa_len); error = copyout((caddr_t)sa, uap->asa, len); - if (error == 0) + if (error) + goto bad; + /* return the actual, untruncated address length */ + len = sa_len; gotnothing: - error = copyout((caddr_t)&len, uap->alen, sizeof(socklen_t)); + error = copyout((caddr_t)&len, uap->alen, sizeof (socklen_t)); bad: if (sa) FREE(sa, M_SONAME); @@ -1466,31 +1964,29 @@ out: return (error); } -int -getsockname(struct proc *p, struct getsockname_args *uap, register_t *retval) -{ - return (getsockname1(p, uap, retval, 0)); -} - -#if COMPAT_43_SOCKET -int -ogetsockname(struct proc *p, struct getsockname_args *uap, register_t *retval) -{ - return (getsockname1(p, uap, retval, 1)); -} -#endif /* COMPAT_43_SOCKET */ - /* * 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 -getpeername1(__unused struct proc *p, struct getpeername_args *uap, __unused register_t *retval, - int compat) +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); @@ -1503,42 +1999,30 @@ getpeername1(__unused struct proc *p, struct getpeername_args *uap, __unused reg 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)); + 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) - { - 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); - } - } - + if (error == 0) { + 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) @@ -1547,17 +2031,15 @@ getpeername1(__unused struct proc *p, struct getpeername_args *uap, __unused reg len = 0; goto gotnothing; } - len = MIN(len, sa->sa_len); -#if COMPAT_43_SOCKET - if (compat) - ((struct osockaddr *)sa)->sa_family = - sa->sa_family; -#endif + 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)); + error = copyout((caddr_t)&len, uap->alen, sizeof (socklen_t)); bad: if (sa) FREE(sa, M_SONAME); out: @@ -1566,63 +2048,48 @@ out: } int -getpeername(struct proc *p, struct getpeername_args *uap, register_t *retval) -{ - - return (getpeername1(p, uap, retval, 0)); -} - -#if COMPAT_43_SOCKET -int -ogetpeername(struct proc *p, struct getpeername_args *uap, register_t *retval) -{ - - return (getpeername1(p, uap, retval, 1)); -} -#endif /* COMPAT_43_SOCKET */ - -int -sockargs(mp, data, buflen, type) - struct mbuf **mp; - user_addr_t data; - int buflen, type; +sockargs(struct mbuf **mp, user_addr_t data, int buflen, int type) { - register struct sockaddr *sa; - register struct mbuf *m; + struct sockaddr *sa; + struct mbuf *m; int error; - if ((u_int)buflen > MLEN) { -#if COMPAT_43_SOCKET - if (type == MT_SONAME && (u_int)buflen <= 112) - buflen = MLEN; /* unix domain compat. hack */ - else + 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 ((u_int)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)buflen > MLEN) { + if (alloc_buflen > MLEN) { MCLGET(m, M_WAIT); if ((m->m_flags & M_EXT) == 0) { m_free(m); - return ENOBUFS; + 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) + if (error) { (void) m_free(m); - else { + } else { *mp = m; if (type == MT_SONAME) { sa = mtod(m, struct sockaddr *); - -#if COMPAT_43_SOCKET && BYTE_ORDER != BIG_ENDIAN - if (sa->sa_family == 0 && sa->sa_len < AF_MAX) - sa->sa_family = sa->sa_len; -#endif sa->sa_len = buflen; } } @@ -1631,369 +2098,534 @@ sockargs(mp, data, buflen, type) /* * 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 */ -int -getsockaddr(struct sockaddr **namp, user_addr_t uaddr, size_t len) +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; + return (ENAMETOOLONG); - if (len == 0) - return EINVAL; + if (len < offsetof(struct sockaddr, sa_data[0])) + return (EINVAL); - MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK); + MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK | M_ZERO); if (sa == NULL) { - return ENOMEM; + return (ENOMEM); } error = copyin(uaddr, (caddr_t)sa, len); if (error) { FREE(sa, M_SONAME); } else { -#if COMPAT_43_SOCKET && BYTE_ORDER != BIG_ENDIAN - if (sa->sa_family == 0 && sa->sa_len < AF_MAX) - sa->sa_family = sa->sa_len; -#endif + /* + * 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; + return (error); } - -#if SENDFILE -/* - * Allocate a pool of sf_bufs (sendfile(2) or "super-fast" if you prefer. :-)) - * XXX - The sf_buf functions are currently private to sendfile(2), so have - * been made static, but may be useful in the future for doing zero-copy in - * other parts of the networking code. - */ -static void -sf_buf_init(void *arg) +static int +getsockaddr_s(struct socket *so, struct sockaddr_storage *ss, + user_addr_t uaddr, size_t len, boolean_t translate_unspec) { - int i; + 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); - SLIST_INIT(&sf_freelist); - kmem_alloc_pageable(kernel_map, &sf_base, nsfbufs * PAGE_SIZE); - MALLOC(sf_bufs, struct sf_buf *, nsfbufs * sizeof(struct sf_buf), M_TEMP, M_NOWAIT|M_ZERO); - if (sf_bufs == NULL) - return; /* XXX silently fail leaving sf_bufs NULL */ + 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; - for (i = 0; i < nsfbufs; i++) { - sf_bufs[i].kva = sf_base + i * PAGE_SIZE; - SLIST_INSERT_HEAD(&sf_freelist, &sf_bufs[i], free_list); + ss->ss_len = len; } + return (error); } /* - * Get an sf_buf from the freelist. Will block if none are available. + * Hard limit on the number of source and/or destination addresses + * that can be specified by an application. */ -static struct sf_buf * -sf_buf_alloc() +#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 sf_buf *sf; + 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); - while ((sf = SLIST_FIRST(&sf_freelist)) == NULL) { - sf_buf_alloc_want = 1; - tsleep(&sf_freelist, PVM, "sfbufa", 0); + 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; } - SLIST_REMOVE_HEAD(&sf_freelist, free_list); - sf->refcnt = 1; - return (sf); + + if (error != 0) + sockaddrlist_free(sl); + else + *slp = sl; + + return (error); } -#define dtosf(x) (&sf_bufs[((uintptr_t)(x) - (uintptr_t)sf_base) >> PAGE_SHIFT]) -static void -sf_buf_ref(caddr_t addr, u_int size) +#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) { - struct sf_buf *sf; + size_t maxlen = 0; - sf = dtosf(addr); - if (sf->refcnt == 0) - panic("sf_buf_ref: referencing a free sf_buf"); - sf->refcnt++; + while (m) { + maxlen += mbuf_maxlen(m); + m = mbuf_next(m); + } + return (maxlen); } -/* - * Lose a reference to an sf_buf. When none left, detach mapped page - * and release resources back to the system. - * - * Must be called at splimp. - */ static void -sf_buf_free(caddr_t addr, u_int size) +alloc_sendpkt(int how, size_t pktlen, unsigned int *maxchunks, + struct mbuf **m, boolean_t jumbocl) { - struct sf_buf *sf; - struct vm_page *m; - - sf = dtosf(addr); - if (sf->refcnt == 0) - panic("sf_buf_free: freeing free sf_buf"); - sf->refcnt--; - if (sf->refcnt == 0) { - pmap_qremove((vm_offset_t)addr, 1); - m = sf->m; - vm_page_unwire(m, 0); - /* - * Check for the object going away on us. This can - * happen since we don't hold a reference to it. - * If so, we're responsible for freeing the page. - */ - if (m->wire_count == 0 && m->object == NULL) - vm_page_lock_queues(); - vm_page_free(m); - vm_page_unlock_queues(); - sf->m = NULL; - SLIST_INSERT_HEAD(&sf_freelist, sf, free_list); - if (sf_buf_alloc_want) { - sf_buf_alloc_want = 0; - wakeup(&sf_freelist); - } + 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, size_t nbytes, - * struct sf_hdtr *hdtr, off_t *sbytes, int flags) + * 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 *sbytes. + * 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) +sendfile(struct proc *p, struct sendfile_args *uap, __unused int *retval) { struct fileproc *fp; struct vnode *vp; - struct vm_object *obj; struct socket *so; - struct mbuf *m; - struct sf_buf *sf; - struct vm_page *pg; - struct writev_args nuap; - struct sf_hdtr hdtr; - off_t off, xfsize, sbytes = 0; - int error = 0, s; + 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); - if (sf_bufs == NULL) { - /* Fail if initialization failed */ - return ENOSYS; - } + 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)) + 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) { + } + if ((fp->f_flag & FREAD) == 0) { error = EBADF; goto done1; } - obj = vp->v_object; - if (vp->v_type != VREG || obj == NULL) { - error = EINVAL; + if (vnode_isreg(vp) == 0) { + error = ENOTSUP; goto done1; } error = file_socket(uap->s, &so); - if (error) + if (error) { + ENXIO_10146739_DBG("%s: file_socket error. %s"); goto done1; + } if (so == NULL) { error = EBADF; goto done2; } - - socket_lock(so, 1); - if (so->so_type != SOCK_STREAM) { error = EINVAL; - goto done3; + goto done2; } if ((so->so_state & SS_ISCONNECTED) == 0) { error = ENOTCONN; - goto done3; + goto done2; } if (uap->offset < 0) { error = EINVAL; - goto done3; + 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 != NULL) { - error = copyin(CAST_USER_ADDR_T(uap->hdtr), &hdtr, sizeof(hdtr)); + 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 done3; + 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 (hdtr.headers != NULL) { + if (user_hdtr.headers != USER_ADDR_NULL) { + bzero(&nuap, sizeof (struct writev_args)); nuap.fd = uap->s; - nuap.iovp = hdtr.headers; - nuap.iovcnt = hdtr.hdr_cnt; - error = writev(p, &nuap); - if (error) - goto done3; - sbytes += p->p_retval[0]; + 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; } } /* - * Protect against multiple writers to the socket. + * 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 */ - (void) sblock(&so->so_snd, M_WAIT); + if ((error = vnode_size(vp, &file_size, vfs_context_current())) != 0) { + ENXIO_10146739_DBG("%s: vnode_size error. %s"); + goto done2; + } /* - * Loop through the pages in the file, starting with the requested - * offset. Get a file page (do I/O if necessary), map the file page - * into an sf_buf, attach an mbuf header to the sf_buf, and queue - * it on the socket. + * 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) { - vm_object_offset_t pindex; - vm_object_offset_t pgoff; + 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; - pindex = OFF_TO_IDX(off); -retry_lookup: /* - * Calculate the amount to transfer. Not to exceed a page, + * 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 = obj->un_pager.vnp.vnp_size - off; - if (xfsize > PAGE_SIZE_64) - xfsize = PAGE_SIZE; - pgoff = (vm_object_offset_t)(off & PAGE_MASK_64); - if (PAGE_SIZE - pgoff < xfsize) + 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 (uap->nbytes && xfsize > (uap->nbytes - sbytes)) - xfsize = uap->nbytes - sbytes; + 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; + /* - * Optimize the non-blocking case by looking at the socket space - * before going to the extra work of constituting the sf_buf. + * 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. */ - if ((so->so_state & SS_NBIO) && sbspace(&so->so_snd) <= 0) { - if (so->so_state & SS_CANTSENDMORE) - error = EPIPE; - else - error = EAGAIN; - sbunlock(&so->so_snd, 0); /* will release lock */ - goto done2; + 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; } - /* - * Attempt to look up the page. If the page doesn't exist or the - * part we're interested in isn't valid, then read it from disk. - * If some other part of the kernel has this page (i.e. it's busy), - * then disk I/O may be occuring on it, so wait and retry. - */ - pg = vm_page_lookup(obj, pindex); - if (pg == NULL || (!(pg->flags & PG_BUSY) && !pg->busy && - !vm_page_is_valid(pg, pgoff, xfsize))) { - struct uio auio; - struct iovec aiov; - int bsize; - - if (pg == NULL) { - pg = vm_page_alloc(obj, pindex, VM_ALLOC_NORMAL); - if (pg == NULL) { - VM_WAIT; - goto retry_lookup; - } - /* - * don't just clear PG_BUSY manually - - * vm_page_alloc() should be considered opaque, - * use the VM routine provided to clear - * PG_BUSY. - */ - vm_page_wakeup(pg); + 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; } - /* - * Ensure that our page is still around when the I/O completes. - */ - vm_page_io_start(pg); - vm_page_wire(pg); - /* - * Get the page from backing store. - */ - bsize = vp->v_mount->mnt_vfsstat.f_iosize; - auio.uio_iov = &aiov; - auio.uio_iovcnt = 1; - aiov.iov_base = 0; - aiov.iov_len = MAXBSIZE; - auio.uio_offset = trunc_page(off); - auio.uio_segflg = UIO_NOCOPY; - auio.uio_rw = UIO_READ; - uio_setresid(&auio, MAXBSIZE); - error = VOP_READ(vp, &auio, IO_VMIO | ((MAXBSIZE / bsize) << 16), - p->p_ucred); - vm_page_flag_clear(pg, PG_ZERO); - vm_page_io_finish(pg); - if (error) { - vm_page_unwire(pg, 0); - /* - * See if anyone else might know about this page. - * If not and it is not valid, then free it. - */ - if (pg->wire_count == 0 && pg->valid == 0 && - pg->busy == 0 && !(pg->flags & PG_BUSY) && - pg->hold_count == 0) - vm_page_lock_queues(); - vm_page_free(pg); - vm_page_unlock_queues(); - sbunlock(&so->so_snd, 0); /* will release socket lock */ - goto done2; - } - } else { - if ((pg->flags & PG_BUSY) || pg->busy) { - s = splvm(); - if ((pg->flags & PG_BUSY) || pg->busy) { - /* - * Page is busy. Wait and retry. - */ - vm_page_flag_set(pg, PG_WANTED); - tsleep(pg, PVM, "sfpbsy", 0); - goto retry_lookup; - } - } - /* - * Protect from having the page ripped out from beneath us. - */ - vm_page_wire(pg); } - /* - * Allocate a kernel virtual page and insert the physical page - * into it. - */ - sf = sf_buf_alloc(); - sf->m = pg; - pmap_qenter(sf->kva, &pg, 1); - /* - * Get an mbuf header and set it up as having external storage. - */ - MGETHDR(m, M_WAIT, MT_DATA); - if (m == NULL) { - error = ENOBUFS; - sbunlock(&so->so_snd, 0); /* will release socket lock */ - goto done2; + 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; } - m->m_ext.ext_free = sf_buf_free; - m->m_ext.ext_ref = sf_buf_ref; - m->m_ext.ext_buf = (void *)sf->kva; - m->m_ext.ext_size = PAGE_SIZE; - m->m_data = (char *) sf->kva + pgoff; - m->m_flags |= M_EXT; - m->m_pkthdr.len = m->m_len = xfsize; - /* - * Add the buffer to the socket buffer chain. - */ + 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. @@ -2013,69 +2645,102 @@ retry_space: error = so->so_error; so->so_error = 0; } - m_freem(m); - sbunlock(&so->so_snd, 0); /* will release socket lock */ - goto done2; + 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) < so->so_snd.sb_lowat) { + if (sbspace(&so->so_snd) < (long)so->so_snd.sb_lowat) { if (so->so_state & SS_NBIO) { - m_freem(m); - sbunlock(&so->so_snd, 0); /* will release socket lock */ + m_freem(m0); error = EAGAIN; - goto done2; + 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(m); - sbunlock(&so->so_snd, 0); - goto done2; + m_freem(m0); + goto done3; } goto retry_space; } - error = (*so->so_proto->pr_usrreqs->pru_send)(so, 0, m, 0, 0, p); - splx(s); + + 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) { - sbunlock(&so->so_snd, 0); /* will release socket lock */ - goto done2; + ENXIO_10146739_DBG("%s: pru_send error. %s"); + goto done3; } } - sbunlock(&so->so_snd, 0); /* will release socket lock */ - + sbunlock(&so->so_snd, FALSE); /* will unlock socket */ /* * Send trailers. Wimp out and use writev(2). */ - if (uap->hdtr != NULL && hdtr.trailers != NULL) { - nuap.fd = uap->s; - nuap.iovp = hdtr.trailers; - nuap.iovcnt = hdtr.trl_cnt; - error = writev(p, &nuap); - if (error) - goto done2; - sbytes += p->p_retval[0]; + 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->sbytes != NULL) { + if (uap->nbytes != USER_ADDR_NULL) { /* XXX this appears bogus for some early failure conditions */ - copyout(&sbytes, CAST_USER_ADDR_T(uap->sbytes), sizeof(off_t)); + 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: - socket_unlock(so, 1); + sbunlock(&so->so_snd, FALSE); /* will unlock socket */ goto done2; } -#endif + +#endif /* SENDFILE */