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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_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
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/file.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 <net/if.h>
#include <net/route.h>

int soo_read __P((struct file *fp, struct uio *uio, 
		struct ucred *cred));
int soo_write __P((struct file *fp, struct uio *uio, 
		struct ucred *cred));
int soo_close __P((struct file *fp, struct proc *p));

int soo_select __P((struct file *fp, int which, struct proc *p));

struct	fileops socketops =
    { soo_read, soo_write, soo_ioctl, soo_select, soo_close };

/* ARGSUSED */
int
soo_read(fp, uio, cred)
	struct file *fp;
	struct uio *uio;
	struct ucred *cred;
{
	struct socket *so = (struct socket *)fp->f_data;
	struct kextcb *kp;
	int stat;
	int (*fsoreceive) __P((struct socket *so, 
			       struct sockaddr **paddr,
			       struct uio *uio, struct mbuf **mp0,
			       struct mbuf **controlp, int *flagsp));

	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
	fsoreceive = so->so_proto->pr_usrreqs->pru_soreceive;
	if (fsoreceive != soreceive)
	{	kp = sotokextcb(so);
		while (kp)
		{	if (kp->e_soif && kp->e_soif->sf_soreceive)
				(*kp->e_soif->sf_soreceive)(so, 0, &uio,
							    0, 0, 0, kp);
			kp = kp->e_next;
		}

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

/* ARGSUSED */
int
soo_write(fp, uio, cred)
	struct file *fp;
	struct uio *uio;
	struct ucred *cred;
{
	struct socket *so = (struct socket *)fp->f_data;
	int	(*fsosend) __P((struct socket *so, struct sockaddr *addr,
				struct uio *uio, struct mbuf *top,
				struct mbuf *control, int flags));
	struct kextcb *kp;
	int           stat;

	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
	fsosend = so->so_proto->pr_usrreqs->pru_sosend;
	if (fsosend != sosend)
	{	kp = sotokextcb(so);
		while (kp)
		{	if (kp->e_soif && kp->e_soif->sf_sosend)
			(*kp->e_soif->sf_sosend)(so, 0, &uio,
						 0, 0, 0, kp);
			kp = kp->e_next;
		}
	}

	stat = (*fsosend)(so, 0, uio, 0, 0, 0);
	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
	return stat;
}

int
soo_ioctl(fp, cmd, data, p)
	struct file *fp;
	u_long cmd;
	register caddr_t data;
	struct proc *p;
{
	register struct socket *so = (struct socket *)fp->f_data;

	struct sockopt sopt;
	struct kextcb *kp;
	int    error = 0;
	kp = sotokextcb(so);
	sopt.sopt_level = cmd;
	sopt.sopt_name = (int)data;
	sopt.sopt_p = p;


	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);

	while (kp)
	{	if (kp->e_soif && kp->e_soif->sf_socontrol)
			(*kp->e_soif->sf_socontrol)(so, &sopt, kp);
		kp = kp->e_next;
	}

	switch (cmd) {

	case FIONBIO:
		if (*(int *)data)
			so->so_state |= SS_NBIO;
		else
			so->so_state &= ~SS_NBIO;

		thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		return (0);

	case FIOASYNC:
		if (*(int *)data) {
			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;
		}
		thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		return (0);

	case FIONREAD:
		*(int *)data = so->so_rcv.sb_cc;
		thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		return (0);

	case SIOCSPGRP:
		so->so_pgid = *(int *)data;
		thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		return (0);

	case SIOCGPGRP:
		*(int *)data = so->so_pgid;
		thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		return (0);

	case SIOCATMARK:
	     *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
		thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		return (0);

	case SIOCSETOT: {
	     /*
	      * Set socket level options here and then call protocol
	      * specific routine.
	      */
	     struct socket	*cloned_so = NULL;
	     int				cloned_fd = *(int *)data;

	     /* let's make sure it's either -1 or a valid file descriptor */
	     if (cloned_fd != -1) {
		  struct file     *cloned_fp;
		  error = getsock(p->p_fd, cloned_fd, &cloned_fp);
		  if (error) {
		       thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
		       return (error);
		  }

		  cloned_so = (struct socket *)cloned_fp->f_data;
	     }

	     /* Always set socket non-blocking for OT */
	     fp->f_flag |= FNONBLOCK;
	     so->so_state |= SS_NBIO;
	     so->so_options |= SO_DONTTRUNC | SO_WANTMORE;

	     if (cloned_so && so != cloned_so) {
		  /* Flags options */
		  so->so_options |= cloned_so->so_options & ~SO_ACCEPTCONN;

            /* SO_LINGER */
            if (so->so_options & SO_LINGER)
                so->so_linger = cloned_so->so_linger;

            /* SO_SNDBUF, SO_RCVBUF */
		  if (cloned_so->so_snd.sb_hiwat > 0) {
		       if (sbreserve(&so->so_snd, cloned_so->so_snd.sb_hiwat) == 0) {
			    error = ENOBUFS;
			    thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
			    return (error);
		       }
		  }
		  if (cloned_so->so_rcv.sb_hiwat > 0) {
		       if (sbreserve(&so->so_rcv, cloned_so->so_rcv.sb_hiwat) == 0) {
			    error = ENOBUFS;
			    thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
			    return (error);
		       }
		  }

		  /* SO_SNDLOWAT, SO_RCVLOWAT */
		  so->so_snd.sb_lowat =
		       (cloned_so->so_snd.sb_lowat > so->so_snd.sb_hiwat) ?
		       so->so_snd.sb_hiwat : cloned_so->so_snd.sb_lowat;
		  so->so_rcv.sb_lowat =
		       (cloned_so->so_rcv.sb_lowat > so->so_rcv.sb_hiwat) ?
		       so->so_rcv.sb_hiwat : cloned_so->so_rcv.sb_lowat;

            /* SO_SNDTIMEO, SO_RCVTIMEO */
		  so->so_snd.sb_timeo = cloned_so->so_snd.sb_timeo;
		  so->so_rcv.sb_timeo = cloned_so->so_rcv.sb_timeo;
	     }

	     error = (*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p);
	     /* Just ignore protocols that do not understand it */
	     if (error == EOPNOTSUPP)
		  error = 0;

	     thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
	     return (error);
        }
	}
	/*
	 * Interface/routing/protocol specific ioctls:
	 * interface and routing ioctls should have a
	 * different entry since a socket's unnecessary
	 */
	if (IOCGROUP(cmd) == 'i')
	     error = ifioctl(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, 0, p);

	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
	return error;
}

int
soo_select(fp, which, p)
	struct file *fp;
	int which;
	struct proc *p;
{
	register struct socket *so = (struct socket *)fp->f_data;
	register int s = splnet();
	int retnum=0;

/*	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL); */

	switch (which) {

	case FREAD:
		if (soreadable(so)) {
			splx(s);
			retnum = 1;
			goto done;
		}
		selrecord(p, &so->so_rcv.sb_sel);
		so->so_rcv.sb_flags |= SB_SEL;
		break;

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

	case 0:
		if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
			splx(s);
			retnum = 1;
			goto done;
		}
		selrecord(p, &so->so_rcv.sb_sel);
		so->so_rcv.sb_flags |= SB_SEL;
		break;
	}
	splx(s);
done:
/*	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL); */
	return (retnum);
}


int
soo_stat(so, ub)
	register struct socket *so;
	register struct stat *ub;
{
     int stat;

	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
	bzero((caddr_t)ub, sizeof (*ub));
	ub->st_mode = S_IFSOCK;
	stat = (*so->so_proto->pr_usrreqs->pru_sense)(so, ub);
	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
	return stat;
}

/* ARGSUSED */
int
soo_close(fp, p)
	struct file *fp;
	struct proc *p;
{
	int error = 0;

	if (fp->f_data) {
	     thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
	     error = soclose((struct socket *)fp->f_data);
	     thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
	}

	fp->f_data = 0;
	return (error);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1982, 1986, 1990, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the above copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* This product includes software developed by the University of
	37	* California, Berkeley and its contributors.
	38	* 4. Neither the name of the University nor the names of its contributors
	39	* may be used to endorse or promote products derived from this software
	40	* without specific prior written permission.
	41	*
	42	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	43	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	44	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	45	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	46	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	47	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	48	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	49	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	50	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	51	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	52	* SUCH DAMAGE.
	53	*
	54	* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
	55	*/
	56
	57	#include <sys/param.h>
	58	#include <sys/systm.h>
	59	#include <sys/file.h>
	60	#include <sys/protosw.h>
	61	#include <sys/socket.h>
	62	#include <sys/socketvar.h>
	63	#include <sys/filio.h> /* XXX */
	64	#include <sys/sockio.h>
65	#include <sys/stat.h>
66	#include <sys/uio.h>
67	#include <sys/filedesc.h>
68
69	#include <net/if.h>
70	#include <net/route.h>
71
72	int soo_read __P((struct file fp, struct uio uio,
73	struct ucred *cred));
74	int soo_write __P((struct file fp, struct uio uio,
75	struct ucred *cred));
76	int soo_close __P((struct file fp, struct proc p));
77
78	int soo_select __P((struct file fp, int which, struct proc p));
79
80	struct fileops socketops =
81	{ soo_read, soo_write, soo_ioctl, soo_select, soo_close };
82
83	/* ARGSUSED */
84	int
85	soo_read(fp, uio, cred)
86	struct file *fp;
87	struct uio *uio;
88	struct ucred *cred;
89	{
90	struct socket so = (struct socket )fp->f_data;
91	struct kextcb *kp;
92	int stat;
93	int (fsoreceive) __P((struct socket so,
94	struct sockaddr **paddr,
95	struct uio uio, struct mbuf *mp0,
96	struct mbuf *controlp, int flagsp));
97
98	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
99	fsoreceive = so->so_proto->pr_usrreqs->pru_soreceive;
100	if (fsoreceive != soreceive)
101	{ kp = sotokextcb(so);
102	while (kp)
103	{ if (kp->e_soif && kp->e_soif->sf_soreceive)
104	(*kp->e_soif->sf_soreceive)(so, 0, &uio,
105	0, 0, 0, kp);
106	kp = kp->e_next;
107	}
108
109	}
110
111	stat = (*fsoreceive)(so, 0, uio, 0, 0, 0);
112	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
113	return stat;
114	}
115
116	/* ARGSUSED */
117	int
118	soo_write(fp, uio, cred)
119	struct file *fp;
120	struct uio *uio;
121	struct ucred *cred;
122	{
123	struct socket so = (struct socket )fp->f_data;
124	int (fsosend) __P((struct socket so, struct sockaddr *addr,
125	struct uio uio, struct mbuf top,
126	struct mbuf *control, int flags));
127	struct kextcb *kp;
128	int stat;
129
130	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
131	fsosend = so->so_proto->pr_usrreqs->pru_sosend;
132	if (fsosend != sosend)
133	{ kp = sotokextcb(so);
134	while (kp)
135	{ if (kp->e_soif && kp->e_soif->sf_sosend)
136	(*kp->e_soif->sf_sosend)(so, 0, &uio,
137	0, 0, 0, kp);
138	kp = kp->e_next;
139	}
140	}
141
142	stat = (*fsosend)(so, 0, uio, 0, 0, 0);
143	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
144	return stat;
145	}
146
147	int
148	soo_ioctl(fp, cmd, data, p)
149	struct file *fp;
150	u_long cmd;
151	register caddr_t data;
152	struct proc *p;
153	{
154	register struct socket so = (struct socket )fp->f_data;
155
156	struct sockopt sopt;
157	struct kextcb *kp;
158	int error = 0;
159	kp = sotokextcb(so);
160	sopt.sopt_level = cmd;
161	sopt.sopt_name = (int)data;
162	sopt.sopt_p = p;
163
164
165	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
166
167	while (kp)
168	{ if (kp->e_soif && kp->e_soif->sf_socontrol)
169	(*kp->e_soif->sf_socontrol)(so, &sopt, kp);
170	kp = kp->e_next;
171	}
172
173	switch (cmd) {
174
175	case FIONBIO:
176	if ((int )data)
177	so->so_state \|= SS_NBIO;
178	else
179	so->so_state &= ~SS_NBIO;
180
181	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
182	return (0);
183
184	case FIOASYNC:
185	if ((int )data) {
186	so->so_state \|= SS_ASYNC;
187	so->so_rcv.sb_flags \|= SB_ASYNC;
188	so->so_snd.sb_flags \|= SB_ASYNC;
189	} else {
190	so->so_state &= ~SS_ASYNC;
191	so->so_rcv.sb_flags &= ~SB_ASYNC;
192	so->so_snd.sb_flags &= ~SB_ASYNC;
193	}
194	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
195	return (0);
196
197	case FIONREAD:
198	(int )data = so->so_rcv.sb_cc;
199	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
200	return (0);
201
202	case SIOCSPGRP:
203	so->so_pgid = (int )data;
204	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
205	return (0);
206
207	case SIOCGPGRP:
208	(int )data = so->so_pgid;
209	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
210	return (0);
211
212	case SIOCATMARK:
213	(int )data = (so->so_state&SS_RCVATMARK) != 0;
214	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
215	return (0);
216
217	case SIOCSETOT: {
218	/*
219	* Set socket level options here and then call protocol
220	* specific routine.
221	*/
222	struct socket *cloned_so = NULL;
223	int cloned_fd = (int )data;
224
225	/* let's make sure it's either -1 or a valid file descriptor */
226	if (cloned_fd != -1) {
227	struct file *cloned_fp;
228	error = getsock(p->p_fd, cloned_fd, &cloned_fp);
229	if (error) {
230	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
231	return (error);
232	}
233
234	cloned_so = (struct socket *)cloned_fp->f_data;
235	}
236
237	/* Always set socket non-blocking for OT */
238	fp->f_flag \|= FNONBLOCK;
239	so->so_state \|= SS_NBIO;
240	so->so_options \|= SO_DONTTRUNC \| SO_WANTMORE;
241
242	if (cloned_so && so != cloned_so) {
243	/* Flags options */
244	so->so_options \|= cloned_so->so_options & ~SO_ACCEPTCONN;
245
246	/* SO_LINGER */
247	if (so->so_options & SO_LINGER)
248	so->so_linger = cloned_so->so_linger;
249
250	/* SO_SNDBUF, SO_RCVBUF */
251	if (cloned_so->so_snd.sb_hiwat > 0) {
252	if (sbreserve(&so->so_snd, cloned_so->so_snd.sb_hiwat) == 0) {
253	error = ENOBUFS;
254	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
255	return (error);
256	}
257	}
258	if (cloned_so->so_rcv.sb_hiwat > 0) {
259	if (sbreserve(&so->so_rcv, cloned_so->so_rcv.sb_hiwat) == 0) {
260	error = ENOBUFS;
261	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
262	return (error);
263	}
264	}
265
266	/* SO_SNDLOWAT, SO_RCVLOWAT */
267	so->so_snd.sb_lowat =
268	(cloned_so->so_snd.sb_lowat > so->so_snd.sb_hiwat) ?
269	so->so_snd.sb_hiwat : cloned_so->so_snd.sb_lowat;
270	so->so_rcv.sb_lowat =
271	(cloned_so->so_rcv.sb_lowat > so->so_rcv.sb_hiwat) ?
272	so->so_rcv.sb_hiwat : cloned_so->so_rcv.sb_lowat;
273
274	/* SO_SNDTIMEO, SO_RCVTIMEO */
275	so->so_snd.sb_timeo = cloned_so->so_snd.sb_timeo;
276	so->so_rcv.sb_timeo = cloned_so->so_rcv.sb_timeo;
277	}
278
279	error = (*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p);
280	/* Just ignore protocols that do not understand it */
281	if (error == EOPNOTSUPP)
282	error = 0;
283
284	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
285	return (error);
286	}
287	}
288	/*
289	* Interface/routing/protocol specific ioctls:
290	* interface and routing ioctls should have a
291	* different entry since a socket's unnecessary
292	*/
293	if (IOCGROUP(cmd) == 'i')
294	error = ifioctl(so, cmd, data, p);
295	else
296	if (IOCGROUP(cmd) == 'r')
297	error = rtioctl(cmd, data, p);
298	else
299	error = (*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p);
300
301	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
302	return error;
303	}
304
305	int
306	soo_select(fp, which, p)
307	struct file *fp;
308	int which;
309	struct proc *p;
310	{
311	register struct socket so = (struct socket )fp->f_data;
312	register int s = splnet();
313	int retnum=0;
314
315	/* thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL); */
316
317	switch (which) {
318
319	case FREAD:
320	if (soreadable(so)) {
321	splx(s);
322	retnum = 1;
323	goto done;
324	}
325	selrecord(p, &so->so_rcv.sb_sel);
326	so->so_rcv.sb_flags \|= SB_SEL;
327	break;
328
329	case FWRITE:
330	if (sowriteable(so)) {
331	splx(s);
332	retnum = 1;
333	goto done;
334	}
335	selrecord(p, &so->so_snd.sb_sel);
336	so->so_snd.sb_flags \|= SB_SEL;
337	break;
338
339	case 0:
340	if (so->so_oobmark \|\| (so->so_state & SS_RCVATMARK)) {
341	splx(s);
342	retnum = 1;
343	goto done;
344	}
345	selrecord(p, &so->so_rcv.sb_sel);
346	so->so_rcv.sb_flags \|= SB_SEL;
347	break;
348	}
349	splx(s);
350	done:
351	/* thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL); */
352	return (retnum);
353	}
354
355
356	int
357	soo_stat(so, ub)
358	register struct socket *so;
359	register struct stat *ub;
360	{
361	int stat;
362
363	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
364	bzero((caddr_t)ub, sizeof (*ub));
365	ub->st_mode = S_IFSOCK;
366	stat = (*so->so_proto->pr_usrreqs->pru_sense)(so, ub);
367	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
368	return stat;
369	}
370
371	/* ARGSUSED */
372	int
373	soo_close(fp, p)
374	struct file *fp;
375	struct proc *p;
376	{
377	int error = 0;
378
379	if (fp->f_data) {
380	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
381	error = soclose((struct socket *)fp->f_data);
382	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
383	}
384
385	fp->f_data = 0;
386	return (error);
387	}