[apple/xnu.git] / bsd / kern / sys_socket.c

/*
 * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1982, 1986, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)sys_socket.c	8.1 (Berkeley) 6/10/93
 */
/*
 * 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/file_internal.h>
#include <sys/event.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/filio.h>                  /* XXX */
#include <sys/sockio.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/filedesc.h>
#include <sys/kauth.h>
#include <sys/signalvar.h>
#include <sys/vnode.h>

#include <net/if.h>
#include <net/route.h>

#if CONFIG_MACF
#include <security/mac_framework.h>
#endif

/*
 * File operations on sockets.
 */
static int soo_read(struct fileproc *, struct uio *, int, vfs_context_t ctx);
static int soo_write(struct fileproc *, struct uio *, int, vfs_context_t ctx);
static int soo_close(struct fileglob *, vfs_context_t ctx);
static int soo_drain(struct fileproc *, vfs_context_t ctx);

const struct fileops socketops = {
	.fo_type     = DTYPE_SOCKET,
	.fo_read     = soo_read,
	.fo_write    = soo_write,
	.fo_ioctl    = soo_ioctl,
	.fo_select   = soo_select,
	.fo_close    = soo_close,
	.fo_drain    = soo_drain,
	.fo_kqfilter = soo_kqfilter,
};

/* ARGSUSED */
static int
soo_read(struct fileproc *fp, struct uio *uio, __unused int flags,
    __unused vfs_context_t ctx)
{
	struct socket *so;
	int stat;

	int (*fsoreceive)(struct socket *so2, struct sockaddr **paddr,
	    struct uio *uio2, struct mbuf **mp0, struct mbuf **controlp,
	    int *flagsp);

	if ((so = (struct socket *)fp->fp_glob->fg_data) == NULL) {
		/* This is not a valid open file descriptor */
		return EBADF;
	}

	fsoreceive = so->so_proto->pr_usrreqs->pru_soreceive;

	stat = (*fsoreceive)(so, 0, uio, 0, 0, 0);
	return stat;
}

/* ARGSUSED */
static int
soo_write(struct fileproc *fp, struct uio *uio, __unused int flags,
    vfs_context_t ctx)
{
	struct socket *so;
	int stat;
	int (*fsosend)(struct socket *so2, struct sockaddr *addr,
	    struct uio *uio2, struct mbuf *top, struct mbuf *control,
	    int flags2);
	proc_t procp;

	if ((so = (struct socket *)fp->fp_glob->fg_data) == NULL) {
		/* This is not a valid open file descriptor */
		return EBADF;
	}

	fsosend = so->so_proto->pr_usrreqs->pru_sosend;

	stat = (*fsosend)(so, 0, uio, 0, 0, 0);

	/* Generation of SIGPIPE can be controlled per socket */
	procp = vfs_context_proc(ctx);
	if (stat == EPIPE && !(so->so_flags & SOF_NOSIGPIPE)) {
		psignal(procp, SIGPIPE);
	}

	return stat;
}

__private_extern__ int
soioctl(struct socket *so, u_long cmd, caddr_t data, struct proc *p)
{
	int error = 0;
	int int_arg;

#if CONFIG_MACF_SOCKET_SUBSET
	error = mac_socket_check_ioctl(kauth_cred_get(), so, cmd);
	if (error) {
		return error;
	}
#endif

	socket_lock(so, 1);

	/* call the socket filter's ioctl handler anything but ours */
	if (IOCGROUP(cmd) != 'i' && IOCGROUP(cmd) != 'r') {
		switch (cmd) {
		case SIOCGASSOCIDS32:
		case SIOCGASSOCIDS64:
		case SIOCGCONNIDS32:
		case SIOCGCONNIDS64:
		case SIOCGCONNINFO32:
		case SIOCGCONNINFO64:
		case SIOCSCONNORDER:
		case SIOCGCONNORDER:
			/* don't pass to filter */
			break;

		default:
			error = sflt_ioctl(so, cmd, data);
			if (error != 0) {
				goto out;
			}
			break;
		}
	}

	switch (cmd) {
	case FIONBIO:                   /* int */
		bcopy(data, &int_arg, sizeof(int_arg));
		if (int_arg) {
			so->so_state |= SS_NBIO;
		} else {
			so->so_state &= ~SS_NBIO;
		}

		goto out;

	case FIOASYNC:                  /* int */
		bcopy(data, &int_arg, sizeof(int_arg));
		if (int_arg) {
			so->so_state |= SS_ASYNC;
			so->so_rcv.sb_flags |= SB_ASYNC;
			so->so_snd.sb_flags |= SB_ASYNC;
		} else {
			so->so_state &= ~SS_ASYNC;
			so->so_rcv.sb_flags &= ~SB_ASYNC;
			so->so_snd.sb_flags &= ~SB_ASYNC;
		}
		goto out;

	case FIONREAD:                  /* int */
		bcopy(&so->so_rcv.sb_cc, data, sizeof(u_int32_t));
		goto out;

	case SIOCSPGRP:                 /* int */
		bcopy(data, &so->so_pgid, sizeof(pid_t));
		goto out;

	case SIOCGPGRP:                 /* int */
		bcopy(&so->so_pgid, data, sizeof(pid_t));
		goto out;

	case SIOCATMARK:                /* int */
		int_arg = (so->so_state & SS_RCVATMARK) != 0;
		bcopy(&int_arg, data, sizeof(int_arg));
		goto out;

	case SIOCSETOT:                 /* int; deprecated */
		error = EOPNOTSUPP;
		goto out;

	case SIOCGASSOCIDS32:           /* so_aidreq32 */
	case SIOCGASSOCIDS64:           /* so_aidreq64 */
	case SIOCGCONNIDS32:            /* so_cidreq32 */
	case SIOCGCONNIDS64:            /* so_cidreq64 */
	case SIOCGCONNINFO32:           /* so_cinforeq32 */
	case SIOCGCONNINFO64:           /* so_cinforeq64 */
	case SIOCSCONNORDER:            /* so_cordreq */
	case SIOCGCONNORDER:            /* so_cordreq */
		error = (*so->so_proto->pr_usrreqs->pru_control)(so,
		    cmd, data, NULL, p);
		goto out;
	}

	/*
	 * Interface/routing/protocol specific ioctls:
	 * interface and routing ioctls should have a
	 * different entry since a socket's unnecessary
	 */
	if (IOCGROUP(cmd) == 'i') {
		error = ifioctllocked(so, cmd, data, p);
	} else {
		if (IOCGROUP(cmd) == 'r') {
			error = rtioctl(cmd, data, p);
		} else {
			error = (*so->so_proto->pr_usrreqs->pru_control)(so,
			    cmd, data, NULL, p);
		}
	}

out:
	socket_unlock(so, 1);

	if (error == EJUSTRETURN) {
		error = 0;
	}

	return error;
}

int
soo_ioctl(struct fileproc *fp, u_long cmd, caddr_t data, vfs_context_t ctx)
{
	struct socket *so;
	proc_t procp = vfs_context_proc(ctx);

	if ((so = (struct socket *)fp->fp_glob->fg_data) == NULL) {
		/* This is not a valid open file descriptor */
		return EBADF;
	}

	return soioctl(so, cmd, data, procp);
}

int
soo_select(struct fileproc *fp, int which, void *wql, vfs_context_t ctx)
{
	struct socket *so = (struct socket *)fp->fp_glob->fg_data;
	int retnum = 0;
	proc_t procp;

	if (so == NULL || so == (struct socket *)-1) {
		return 0;
	}

	procp = vfs_context_proc(ctx);

	socket_lock(so, 1);
	switch (which) {
	case FREAD:
		so->so_rcv.sb_flags |= SB_SEL;
		if (soreadable(so)) {
			retnum = 1;
			so->so_rcv.sb_flags &= ~SB_SEL;
			goto done;
		}
		selrecord(procp, &so->so_rcv.sb_sel, wql);
		break;

	case FWRITE:
		so->so_snd.sb_flags |= SB_SEL;
		if (sowriteable(so)) {
			retnum = 1;
			so->so_snd.sb_flags &= ~SB_SEL;
			goto done;
		}
		selrecord(procp, &so->so_snd.sb_sel, wql);
		break;

	case 0:
		so->so_rcv.sb_flags |= SB_SEL;
		if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
			retnum = 1;
			so->so_rcv.sb_flags &= ~SB_SEL;
			goto done;
		}
		selrecord(procp, &so->so_rcv.sb_sel, wql);
		break;
	}

done:
	socket_unlock(so, 1);
	return retnum;
}

int
soo_stat(struct socket *so, void *ub, int isstat64)
{
	int ret;
	/* warning avoidance ; protected by isstat64 */
	struct stat *sb = (struct stat *)0;
	/* warning avoidance ; protected by isstat64 */
	struct stat64 *sb64 = (struct stat64 *)0;

#if CONFIG_MACF_SOCKET_SUBSET
	ret = mac_socket_check_stat(kauth_cred_get(), so);
	if (ret) {
		return ret;
	}
#endif

	if (isstat64 != 0) {
		sb64 = (struct stat64 *)ub;
		bzero((caddr_t)sb64, sizeof(*sb64));
	} else {
		sb = (struct stat *)ub;
		bzero((caddr_t)sb, sizeof(*sb));
	}

	socket_lock(so, 1);
	if (isstat64 != 0) {
		sb64->st_mode = S_IFSOCK;
		if ((so->so_state & SS_CANTRCVMORE) == 0 ||
		    so->so_rcv.sb_cc != 0) {
			sb64->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
		}
		if ((so->so_state & SS_CANTSENDMORE) == 0) {
			sb64->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
		}
		sb64->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
		sb64->st_uid = kauth_cred_getuid(so->so_cred);
		sb64->st_gid = kauth_cred_getgid(so->so_cred);
	} else {
		sb->st_mode = S_IFSOCK;
		if ((so->so_state & SS_CANTRCVMORE) == 0 ||
		    so->so_rcv.sb_cc != 0) {
			sb->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
		}
		if ((so->so_state & SS_CANTSENDMORE) == 0) {
			sb->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
		}
		sb->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
		sb->st_uid = kauth_cred_getuid(so->so_cred);
		sb->st_gid = kauth_cred_getgid(so->so_cred);
	}

	ret = (*so->so_proto->pr_usrreqs->pru_sense)(so, ub, isstat64);
	socket_unlock(so, 1);
	return ret;
}

/* ARGSUSED */
static int
soo_close(struct fileglob *fg, __unused vfs_context_t ctx)
{
	int error = 0;
	struct socket *sp;

	sp = (struct socket *)fg->fg_data;
	fg->fg_data = NULL;

	if (sp) {
		error = soclose(sp);
	}

	return error;
}

static int
soo_drain(struct fileproc *fp, __unused vfs_context_t ctx)
{
	int error = 0;
	struct socket *so = (struct socket *)fp->fp_glob->fg_data;

	if (so) {
		socket_lock(so, 1);
		so->so_state |= SS_DRAINING;

		wakeup((caddr_t)&so->so_timeo);
		sorwakeup(so);
		sowwakeup(so);
		soevent(so, SO_FILT_HINT_LOCKED);

		socket_unlock(so, 1);
	}

	return error;
}

/*
 * 's' group ioctls.
 *
 * The switch statement below does nothing at runtime, as it serves as a
 * compile time check to ensure that all of the socket 's' ioctls (those
 * in the 's' group going thru soo_ioctl) that are made available by the
 * networking stack is unique.  This works as long as this routine gets
 * updated each time a new interface ioctl gets added.
 *
 * Any failures at compile time indicates duplicated ioctl values.
 */
static __attribute__((unused)) void
soioctl_cassert(void)
{
	/*
	 * This is equivalent to _CASSERT() and the compiler wouldn't
	 * generate any instructions, thus for compile time only.
	 */
	switch ((u_long)0) {
	case 0:

	/* bsd/sys/sockio.h */
	case SIOCSHIWAT:
	case SIOCGHIWAT:
	case SIOCSLOWAT:
	case SIOCGLOWAT:
	case SIOCATMARK:
	case SIOCSPGRP:
	case SIOCGPGRP:
	case SIOCSETOT:
	case SIOCGASSOCIDS32:
	case SIOCGASSOCIDS64:
	case SIOCGCONNIDS32:
	case SIOCGCONNIDS64:
	case SIOCGCONNINFO32:
	case SIOCGCONNINFO64:
	case SIOCSCONNORDER:
	case SIOCGCONNORDER:
		;
	}
}
Commit	Line	Data
1c79356b	1	/*
39236c6e	2	* Copyright (c) 2000-2013 Apple Inc. All rights reserved.
5d5c5d0d	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
39236c6e	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
39236c6e	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
2d21ac55 A	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
39236c6e	17	*
2d21ac55 A	18	* The Original Code and all software distributed under the License are
2d21ac55 A	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
39236c6e	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* Copyright (c) 1982, 1986, 1990, 1993
	30	* The Regents of the University of California. All rights reserved.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
	61	*/
2d21ac55 A	62	/*
	63	* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
	64	* support for mandatory and extensible security protections. This notice
	65	* is included in support of clause 2.2 (b) of the Apple Public License,
	66	* Version 2.0.
	67	*/
1c79356b A	68
	69	#include <sys/param.h>
	70	#include <sys/systm.h>
91447636	71	#include <sys/file_internal.h>
55e303ae	72	#include <sys/event.h>
1c79356b A	73	#include <sys/protosw.h>
	74	#include <sys/socket.h>
	75	#include <sys/socketvar.h>
0a7de745	76	#include <sys/filio.h> /* XXX */
1c79356b A	77	#include <sys/sockio.h>
	78	#include <sys/stat.h>
	79	#include <sys/uio.h>
	80	#include <sys/filedesc.h>
91447636 A	81	#include <sys/kauth.h>
91447636 A	82	#include <sys/signalvar.h>
2d21ac55	83	#include <sys/vnode.h>
1c79356b A	84
	85	#include <net/if.h>
	86	#include <net/route.h>
	87
2d21ac55 A	88	#if CONFIG_MACF
	89	#include <security/mac_framework.h>
	90	#endif
	91
91447636 A	92	/*
	93	* File operations on sockets.
	94	*/
2d21ac55 A	95	static int soo_read(struct fileproc , struct uio , int, vfs_context_t ctx);
	96	static int soo_write(struct fileproc , struct uio , int, vfs_context_t ctx);
	97	static int soo_close(struct fileglob *, vfs_context_t ctx);
	98	static int soo_drain(struct fileproc *, vfs_context_t ctx);
	99
39236c6e	100	const struct fileops socketops = {
cb323159 A	101	.fo_type = DTYPE_SOCKET,
	102	.fo_read = soo_read,
	103	.fo_write = soo_write,
	104	.fo_ioctl = soo_ioctl,
	105	.fo_select = soo_select,
	106	.fo_close = soo_close,
	107	.fo_drain = soo_drain,
39037602	108	.fo_kqfilter = soo_kqfilter,
2d21ac55	109	};
1c79356b A	110
1c79356b A	111	/* ARGSUSED */
2d21ac55 A	112	static int
2d21ac55 A	113	soo_read(struct fileproc fp, struct uio uio, __unused int flags,
f427ee49	114	__unused vfs_context_t ctx)
1c79356b	115	{
9bccf70c	116	struct socket *so;
1c79356b	117	int stat;
1c79356b	118
2d21ac55 A	119	int (fsoreceive)(struct socket so2, struct sockaddr **paddr,
	120	struct uio uio2, struct mbuf mp0, struct mbuf *controlp,
	121	int *flagsp);
0b4e3aa0	122
f427ee49	123	if ((so = (struct socket *)fp->fp_glob->fg_data) == NULL) {
2d21ac55	124	/* This is not a valid open file descriptor */
0a7de745	125	return EBADF;
2d21ac55 A	126	}
2d21ac55 A	127
1c79356b	128	fsoreceive = so->so_proto->pr_usrreqs->pru_soreceive;
2d21ac55	129
1c79356b	130	stat = (*fsoreceive)(so, 0, uio, 0, 0, 0);
0a7de745	131	return stat;
1c79356b A	132	}
	133
	134	/* ARGSUSED */
2d21ac55 A	135	static int
2d21ac55 A	136	soo_write(struct fileproc fp, struct uio uio, __unused int flags,
0a7de745	137	vfs_context_t ctx)
1c79356b	138	{
9bccf70c	139	struct socket *so;
2d21ac55 A	140	int stat;
	141	int (fsosend)(struct socket so2, struct sockaddr *addr,
	142	struct uio uio2, struct mbuf top, struct mbuf *control,
	143	int flags2);
	144	proc_t procp;
	145
f427ee49	146	if ((so = (struct socket *)fp->fp_glob->fg_data) == NULL) {
91447636	147	/* This is not a valid open file descriptor */
0a7de745	148	return EBADF;
91447636	149	}
9bccf70c	150
1c79356b	151	fsosend = so->so_proto->pr_usrreqs->pru_sosend;
1c79356b A	152
1c79356b A	153	stat = (*fsosend)(so, 0, uio, 0, 0, 0);
9bccf70c	154
91447636	155	/* Generation of SIGPIPE can be controlled per socket */
2d21ac55	156	procp = vfs_context_proc(ctx);
0a7de745	157	if (stat == EPIPE && !(so->so_flags & SOF_NOSIGPIPE)) {
91447636	158	psignal(procp, SIGPIPE);
0a7de745	159	}
9bccf70c	160
0a7de745	161	return stat;
1c79356b A	162	}
1c79356b A	163
91447636	164	__private_extern__ int
2d21ac55	165	soioctl(struct socket so, u_long cmd, caddr_t data, struct proc p)
1c79356b	166	{
2d21ac55	167	int error = 0;
316670eb	168	int int_arg;
9bccf70c	169
5ba3f43e A	170	#if CONFIG_MACF_SOCKET_SUBSET
5ba3f43e A	171	error = mac_socket_check_ioctl(kauth_cred_get(), so, cmd);
0a7de745 A	172	if (error) {
	173	return error;
	174	}
5ba3f43e A	175	#endif
5ba3f43e A	176
b0d623f7	177	socket_lock(so, 1);
1c79356b	178
39236c6e	179	/* call the socket filter's ioctl handler anything but ours */
2d21ac55	180	if (IOCGROUP(cmd) != 'i' && IOCGROUP(cmd) != 'r') {
39236c6e A	181	switch (cmd) {
	182	case SIOCGASSOCIDS32:
	183	case SIOCGASSOCIDS64:
	184	case SIOCGCONNIDS32:
	185	case SIOCGCONNIDS64:
	186	case SIOCGCONNINFO32:
	187	case SIOCGCONNINFO64:
	188	case SIOCSCONNORDER:
	189	case SIOCGCONNORDER:
	190	/* don't pass to filter */
	191	break;
	192
	193	default:
	194	error = sflt_ioctl(so, cmd, data);
0a7de745	195	if (error != 0) {
39236c6e	196	goto out;
0a7de745	197	}
39236c6e A	198	break;
39236c6e A	199	}
2d21ac55 A	200	}
2d21ac55 A	201
1c79356b	202	switch (cmd) {
0a7de745 A	203	case FIONBIO: /* int */
	204	bcopy(data, &int_arg, sizeof(int_arg));
	205	if (int_arg) {
1c79356b	206	so->so_state \|= SS_NBIO;
0a7de745	207	} else {
1c79356b	208	so->so_state &= ~SS_NBIO;
0a7de745	209	}
1c79356b	210
91447636	211	goto out;
1c79356b	212
0a7de745 A	213	case FIOASYNC: /* int */
0a7de745 A	214	bcopy(data, &int_arg, sizeof(int_arg));
316670eb	215	if (int_arg) {
1c79356b A	216	so->so_state \|= SS_ASYNC;
	217	so->so_rcv.sb_flags \|= SB_ASYNC;
	218	so->so_snd.sb_flags \|= SB_ASYNC;
	219	} else {
	220	so->so_state &= ~SS_ASYNC;
	221	so->so_rcv.sb_flags &= ~SB_ASYNC;
	222	so->so_snd.sb_flags &= ~SB_ASYNC;
	223	}
91447636	224	goto out;
1c79356b	225
0a7de745 A	226	case FIONREAD: /* int */
0a7de745 A	227	bcopy(&so->so_rcv.sb_cc, data, sizeof(u_int32_t));
91447636	228	goto out;
1c79356b	229
0a7de745 A	230	case SIOCSPGRP: /* int */
0a7de745 A	231	bcopy(data, &so->so_pgid, sizeof(pid_t));
91447636	232	goto out;
1c79356b	233
0a7de745 A	234	case SIOCGPGRP: /* int */
0a7de745 A	235	bcopy(&so->so_pgid, data, sizeof(pid_t));
91447636	236	goto out;
1c79356b	237
0a7de745	238	case SIOCATMARK: /* int */
316670eb	239	int_arg = (so->so_state & SS_RCVATMARK) != 0;
0a7de745	240	bcopy(&int_arg, data, sizeof(int_arg));
91447636	241	goto out;
1c79356b	242
0a7de745	243	case SIOCSETOT: /* int; deprecated */
39236c6e A	244	error = EOPNOTSUPP;
39236c6e A	245	goto out;
1c79356b	246
0a7de745 A	247	case SIOCGASSOCIDS32: /* so_aidreq32 */
	248	case SIOCGASSOCIDS64: /* so_aidreq64 */
	249	case SIOCGCONNIDS32: /* so_cidreq32 */
	250	case SIOCGCONNIDS64: /* so_cidreq64 */
	251	case SIOCGCONNINFO32: /* so_cinforeq32 */
	252	case SIOCGCONNINFO64: /* so_cinforeq64 */
	253	case SIOCSCONNORDER: /* so_cordreq */
	254	case SIOCGCONNORDER: /* so_cordreq */
39236c6e A	255	error = (*so->so_proto->pr_usrreqs->pru_control)(so,
39236c6e A	256	cmd, data, NULL, p);
91447636	257	goto out;
2d21ac55	258	}
39236c6e	259
1c79356b A	260	/*
	261	* Interface/routing/protocol specific ioctls:
	262	* interface and routing ioctls should have a
	263	* different entry since a socket's unnecessary
	264	*/
2d21ac55 A	265	if (IOCGROUP(cmd) == 'i') {
	266	error = ifioctllocked(so, cmd, data, p);
	267	} else {
0a7de745	268	if (IOCGROUP(cmd) == 'r') {
2d21ac55	269	error = rtioctl(cmd, data, p);
0a7de745	270	} else {
2d21ac55	271	error = (*so->so_proto->pr_usrreqs->pru_control)(so,
39236c6e	272	cmd, data, NULL, p);
0a7de745	273	}
2d21ac55	274	}
1c79356b	275
91447636	276	out:
91447636 A	277	socket_unlock(so, 1);
91447636 A	278
0a7de745	279	if (error == EJUSTRETURN) {
2d21ac55	280	error = 0;
0a7de745	281	}
2d21ac55	282
0a7de745	283	return error;
91447636 A	284	}
	285
	286	int
2d21ac55	287	soo_ioctl(struct fileproc *fp, u_long cmd, caddr_t data, vfs_context_t ctx)
91447636	288	{
2d21ac55	289	struct socket *so;
2d21ac55	290	proc_t procp = vfs_context_proc(ctx);
91447636	291
f427ee49	292	if ((so = (struct socket *)fp->fp_glob->fg_data) == NULL) {
91447636	293	/* This is not a valid open file descriptor */
0a7de745	294	return EBADF;
91447636	295	}
2d21ac55	296
0a7de745	297	return soioctl(so, cmd, data, procp);
1c79356b A	298	}
	299
	300	int
2d21ac55	301	soo_select(struct fileproc fp, int which, void wql, vfs_context_t ctx)
1c79356b	302	{
f427ee49	303	struct socket so = (struct socket )fp->fp_glob->fg_data;
2d21ac55 A	304	int retnum = 0;
	305	proc_t procp;
	306
0a7de745 A	307	if (so == NULL \|\| so == (struct socket *)-1) {
	308	return 0;
	309	}
39236c6e	310
2d21ac55	311	procp = vfs_context_proc(ctx);
1c79356b	312
91447636	313	socket_lock(so, 1);
1c79356b	314	switch (which) {
1c79356b	315	case FREAD:
0b4e3aa0	316	so->so_rcv.sb_flags \|= SB_SEL;
1c79356b	317	if (soreadable(so)) {
1c79356b	318	retnum = 1;
0b4e3aa0	319	so->so_rcv.sb_flags &= ~SB_SEL;
1c79356b A	320	goto done;
1c79356b A	321	}
2d21ac55	322	selrecord(procp, &so->so_rcv.sb_sel, wql);
1c79356b A	323	break;
	324
	325	case FWRITE:
0b4e3aa0	326	so->so_snd.sb_flags \|= SB_SEL;
1c79356b	327	if (sowriteable(so)) {
1c79356b	328	retnum = 1;
0b4e3aa0	329	so->so_snd.sb_flags &= ~SB_SEL;
1c79356b A	330	goto done;
1c79356b A	331	}
2d21ac55	332	selrecord(procp, &so->so_snd.sb_sel, wql);
1c79356b A	333	break;
	334
	335	case 0:
0b4e3aa0	336	so->so_rcv.sb_flags \|= SB_SEL;
1c79356b	337	if (so->so_oobmark \|\| (so->so_state & SS_RCVATMARK)) {
1c79356b	338	retnum = 1;
0b4e3aa0	339	so->so_rcv.sb_flags &= ~SB_SEL;
1c79356b A	340	goto done;
1c79356b A	341	}
2d21ac55	342	selrecord(procp, &so->so_rcv.sb_sel, wql);
1c79356b A	343	break;
1c79356b A	344	}
2d21ac55	345
1c79356b	346	done:
91447636	347	socket_unlock(so, 1);
0a7de745	348	return retnum;
1c79356b A	349	}
1c79356b A	350
1c79356b	351	int
2d21ac55	352	soo_stat(struct socket so, void ub, int isstat64)
1c79356b	353	{
2d21ac55 A	354	int ret;
	355	/* warning avoidance ; protected by isstat64 */
	356	struct stat sb = (struct stat )0;
	357	/* warning avoidance ; protected by isstat64 */
	358	struct stat64 sb64 = (struct stat64 )0;
	359
5ba3f43e	360	#if CONFIG_MACF_SOCKET_SUBSET
2d21ac55	361	ret = mac_socket_check_stat(kauth_cred_get(), so);
0a7de745 A	362	if (ret) {
	363	return ret;
	364	}
2d21ac55 A	365	#endif
	366
	367	if (isstat64 != 0) {
	368	sb64 = (struct stat64 *)ub;
0a7de745	369	bzero((caddr_t)sb64, sizeof(*sb64));
2d21ac55 A	370	} else {
2d21ac55 A	371	sb = (struct stat *)ub;
0a7de745	372	bzero((caddr_t)sb, sizeof(*sb));
2d21ac55	373	}
1c79356b	374
91447636	375	socket_lock(so, 1);
2d21ac55 A	376	if (isstat64 != 0) {
	377	sb64->st_mode = S_IFSOCK;
	378	if ((so->so_state & SS_CANTRCVMORE) == 0 \|\|
0a7de745	379	so->so_rcv.sb_cc != 0) {
2d21ac55	380	sb64->st_mode \|= S_IRUSR \| S_IRGRP \| S_IROTH;
0a7de745 A	381	}
0a7de745 A	382	if ((so->so_state & SS_CANTSENDMORE) == 0) {
2d21ac55	383	sb64->st_mode \|= S_IWUSR \| S_IWGRP \| S_IWOTH;
0a7de745	384	}
2d21ac55	385	sb64->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
316670eb A	386	sb64->st_uid = kauth_cred_getuid(so->so_cred);
316670eb A	387	sb64->st_gid = kauth_cred_getgid(so->so_cred);
2d21ac55 A	388	} else {
	389	sb->st_mode = S_IFSOCK;
	390	if ((so->so_state & SS_CANTRCVMORE) == 0 \|\|
0a7de745	391	so->so_rcv.sb_cc != 0) {
2d21ac55	392	sb->st_mode \|= S_IRUSR \| S_IRGRP \| S_IROTH;
0a7de745 A	393	}
0a7de745 A	394	if ((so->so_state & SS_CANTSENDMORE) == 0) {
2d21ac55	395	sb->st_mode \|= S_IWUSR \| S_IWGRP \| S_IWOTH;
0a7de745	396	}
2d21ac55	397	sb->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
316670eb A	398	sb->st_uid = kauth_cred_getuid(so->so_cred);
316670eb A	399	sb->st_gid = kauth_cred_getgid(so->so_cred);
2d21ac55 A	400	}
	401
	402	ret = (*so->so_proto->pr_usrreqs->pru_sense)(so, ub, isstat64);
91447636	403	socket_unlock(so, 1);
0a7de745	404	return ret;
1c79356b A	405	}
	406
	407	/* ARGSUSED */
2d21ac55 A	408	static int
2d21ac55 A	409	soo_close(struct fileglob *fg, __unused vfs_context_t ctx)
1c79356b A	410	{
1c79356b A	411	int error = 0;
55e303ae A	412	struct socket *sp;
55e303ae A	413
91447636 A	414	sp = (struct socket *)fg->fg_data;
91447636 A	415	fg->fg_data = NULL;
1c79356b	416
0a7de745	417	if (sp) {
2d21ac55	418	error = soclose(sp);
0a7de745	419	}
1c79356b	420
0a7de745	421	return error;
1c79356b	422	}
91447636	423
2d21ac55 A	424	static int
2d21ac55 A	425	soo_drain(struct fileproc *fp, __unused vfs_context_t ctx)
91447636 A	426	{
91447636 A	427	int error = 0;
f427ee49	428	struct socket so = (struct socket )fp->fp_glob->fg_data;
91447636 A	429
	430	if (so) {
	431	socket_lock(so, 1);
	432	so->so_state \|= SS_DRAINING;
	433
	434	wakeup((caddr_t)&so->so_timeo);
	435	sorwakeup(so);
	436	sowwakeup(so);
316670eb	437	soevent(so, SO_FILT_HINT_LOCKED);
2d21ac55	438
91447636 A	439	socket_unlock(so, 1);
	440	}
	441
0a7de745	442	return error;
91447636	443	}
39236c6e A	444
	445	/*
	446	* 's' group ioctls.
	447	*
	448	* The switch statement below does nothing at runtime, as it serves as a
	449	* compile time check to ensure that all of the socket 's' ioctls (those
	450	* in the 's' group going thru soo_ioctl) that are made available by the
	451	* networking stack is unique. This works as long as this routine gets
	452	* updated each time a new interface ioctl gets added.
	453	*
	454	* Any failures at compile time indicates duplicated ioctl values.
	455	*/
	456	static __attribute__((unused)) void
	457	soioctl_cassert(void)
	458	{
	459	/*
	460	* This is equivalent to _CASSERT() and the compiler wouldn't
	461	* generate any instructions, thus for compile time only.
	462	*/
	463	switch ((u_long)0) {
	464	case 0:
	465
	466	/* bsd/sys/sockio.h */
	467	case SIOCSHIWAT:
	468	case SIOCGHIWAT:
	469	case SIOCSLOWAT:
	470	case SIOCGLOWAT:
	471	case SIOCATMARK:
	472	case SIOCSPGRP:
	473	case SIOCGPGRP:
	474	case SIOCSETOT:
	475	case SIOCGASSOCIDS32:
	476	case SIOCGASSOCIDS64:
	477	case SIOCGCONNIDS32:
	478	case SIOCGCONNIDS64:
	479	case SIOCGCONNINFO32:
	480	case SIOCGCONNINFO64:
	481	case SIOCSCONNORDER:
	482	case SIOCGCONNORDER:
	483	;
	484	}
	485	}