1/*
2 * Copyright (c) 1982, 1986, 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)uipc_socket.c 8.3 (Berkeley) 4/15/94
| 1/*
2 * Copyright (c) 1982, 1986, 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)uipc_socket.c 8.3 (Berkeley) 4/15/94
|
34 * $FreeBSD: head/sys/kern/uipc_socket.c 111741 2003-03-02 15:50:23Z des $
| 34 * $FreeBSD: head/sys/kern/uipc_socket.c 111742 2003-03-02 15:56:49Z des $
|
35 */
36
37#include "opt_inet.h"
38#include "opt_mac.h"
39#include "opt_zero.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/fcntl.h>
44#include <sys/lock.h>
45#include <sys/mac.h>
46#include <sys/malloc.h>
47#include <sys/mbuf.h>
48#include <sys/mutex.h>
49#include <sys/domain.h>
50#include <sys/file.h> /* for struct knote */
51#include <sys/kernel.h>
52#include <sys/event.h>
53#include <sys/poll.h>
54#include <sys/proc.h>
55#include <sys/protosw.h>
56#include <sys/socket.h>
57#include <sys/socketvar.h>
58#include <sys/resourcevar.h>
59#include <sys/signalvar.h>
60#include <sys/sysctl.h>
61#include <sys/uio.h>
62#include <sys/jail.h>
63
64#include <vm/uma.h>
65
66#include <machine/limits.h>
67
68#ifdef INET
69static int do_setopt_accept_filter(struct socket *so, struct sockopt *sopt);
70#endif
71
| 35 */
36
37#include "opt_inet.h"
38#include "opt_mac.h"
39#include "opt_zero.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/fcntl.h>
44#include <sys/lock.h>
45#include <sys/mac.h>
46#include <sys/malloc.h>
47#include <sys/mbuf.h>
48#include <sys/mutex.h>
49#include <sys/domain.h>
50#include <sys/file.h> /* for struct knote */
51#include <sys/kernel.h>
52#include <sys/event.h>
53#include <sys/poll.h>
54#include <sys/proc.h>
55#include <sys/protosw.h>
56#include <sys/socket.h>
57#include <sys/socketvar.h>
58#include <sys/resourcevar.h>
59#include <sys/signalvar.h>
60#include <sys/sysctl.h>
61#include <sys/uio.h>
62#include <sys/jail.h>
63
64#include <vm/uma.h>
65
66#include <machine/limits.h>
67
68#ifdef INET
69static int do_setopt_accept_filter(struct socket *so, struct sockopt *sopt);
70#endif
71
|
72static void filt_sordetach(struct knote *kn);
73static int filt_soread(struct knote *kn, long hint);
74static void filt_sowdetach(struct knote *kn);
| 72static void filt_sordetach(struct knote *kn);
73static int filt_soread(struct knote *kn, long hint);
74static void filt_sowdetach(struct knote *kn);
|
75static int filt_sowrite(struct knote *kn, long hint);
76static int filt_solisten(struct knote *kn, long hint);
77
78static struct filterops solisten_filtops =
79 { 1, NULL, filt_sordetach, filt_solisten };
80static struct filterops soread_filtops =
81 { 1, NULL, filt_sordetach, filt_soread };
82static struct filterops sowrite_filtops =
83 { 1, NULL, filt_sowdetach, filt_sowrite };
84
85uma_zone_t socket_zone;
86so_gen_t so_gencnt; /* generation count for sockets */
87
88MALLOC_DEFINE(M_SONAME, "soname", "socket name");
89MALLOC_DEFINE(M_PCB, "pcb", "protocol control block");
90
91SYSCTL_DECL(_kern_ipc);
92
93static int somaxconn = SOMAXCONN;
94SYSCTL_INT(_kern_ipc, KIPC_SOMAXCONN, somaxconn, CTLFLAG_RW,
95 &somaxconn, 0, "Maximum pending socket connection queue size");
96static int numopensockets;
97SYSCTL_INT(_kern_ipc, OID_AUTO, numopensockets, CTLFLAG_RD,
98 &numopensockets, 0, "Number of open sockets");
99#ifdef ZERO_COPY_SOCKETS
100/* These aren't static because they're used in other files. */
101int so_zero_copy_send = 1;
102int so_zero_copy_receive = 1;
103SYSCTL_NODE(_kern_ipc, OID_AUTO, zero_copy, CTLFLAG_RD, 0,
104 "Zero copy controls");
105SYSCTL_INT(_kern_ipc_zero_copy, OID_AUTO, receive, CTLFLAG_RW,
106 &so_zero_copy_receive, 0, "Enable zero copy receive");
107SYSCTL_INT(_kern_ipc_zero_copy, OID_AUTO, send, CTLFLAG_RW,
108 &so_zero_copy_send, 0, "Enable zero copy send");
109#endif /* ZERO_COPY_SOCKETS */
110
111
112/*
113 * Socket operation routines.
114 * These routines are called by the routines in
115 * sys_socket.c or from a system process, and
116 * implement the semantics of socket operations by
117 * switching out to the protocol specific routines.
118 */
119
120/*
121 * Get a socket structure from our zone, and initialize it.
122 * Note that it would probably be better to allocate socket
123 * and PCB at the same time, but I'm not convinced that all
124 * the protocols can be easily modified to do this.
125 *
126 * soalloc() returns a socket with a ref count of 0.
127 */
128struct socket *
129soalloc(waitok)
130 int waitok;
131{
132 struct socket *so;
133#ifdef MAC
134 int error;
135#endif
136 int flag;
137
138 if (waitok == 1)
139 flag = M_WAITOK;
140 else
141 flag = M_NOWAIT;
142 flag |= M_ZERO;
143 so = uma_zalloc(socket_zone, flag);
144 if (so) {
145#ifdef MAC
146 error = mac_init_socket(so, flag);
147 if (error != 0) {
148 uma_zfree(socket_zone, so);
149 so = NULL;
150 return so;
151 }
152#endif
153 /* XXX race condition for reentrant kernel */
154 so->so_gencnt = ++so_gencnt;
155 /* sx_init(&so->so_sxlock, "socket sxlock"); */
156 TAILQ_INIT(&so->so_aiojobq);
157 ++numopensockets;
158 }
159 return so;
160}
161
162/*
163 * socreate returns a socket with a ref count of 1. The socket should be
164 * closed with soclose().
165 */
166int
167socreate(dom, aso, type, proto, cred, td)
168 int dom;
169 struct socket **aso;
| 75static int filt_sowrite(struct knote *kn, long hint);
76static int filt_solisten(struct knote *kn, long hint);
77
78static struct filterops solisten_filtops =
79 { 1, NULL, filt_sordetach, filt_solisten };
80static struct filterops soread_filtops =
81 { 1, NULL, filt_sordetach, filt_soread };
82static struct filterops sowrite_filtops =
83 { 1, NULL, filt_sowdetach, filt_sowrite };
84
85uma_zone_t socket_zone;
86so_gen_t so_gencnt; /* generation count for sockets */
87
88MALLOC_DEFINE(M_SONAME, "soname", "socket name");
89MALLOC_DEFINE(M_PCB, "pcb", "protocol control block");
90
91SYSCTL_DECL(_kern_ipc);
92
93static int somaxconn = SOMAXCONN;
94SYSCTL_INT(_kern_ipc, KIPC_SOMAXCONN, somaxconn, CTLFLAG_RW,
95 &somaxconn, 0, "Maximum pending socket connection queue size");
96static int numopensockets;
97SYSCTL_INT(_kern_ipc, OID_AUTO, numopensockets, CTLFLAG_RD,
98 &numopensockets, 0, "Number of open sockets");
99#ifdef ZERO_COPY_SOCKETS
100/* These aren't static because they're used in other files. */
101int so_zero_copy_send = 1;
102int so_zero_copy_receive = 1;
103SYSCTL_NODE(_kern_ipc, OID_AUTO, zero_copy, CTLFLAG_RD, 0,
104 "Zero copy controls");
105SYSCTL_INT(_kern_ipc_zero_copy, OID_AUTO, receive, CTLFLAG_RW,
106 &so_zero_copy_receive, 0, "Enable zero copy receive");
107SYSCTL_INT(_kern_ipc_zero_copy, OID_AUTO, send, CTLFLAG_RW,
108 &so_zero_copy_send, 0, "Enable zero copy send");
109#endif /* ZERO_COPY_SOCKETS */
110
111
112/*
113 * Socket operation routines.
114 * These routines are called by the routines in
115 * sys_socket.c or from a system process, and
116 * implement the semantics of socket operations by
117 * switching out to the protocol specific routines.
118 */
119
120/*
121 * Get a socket structure from our zone, and initialize it.
122 * Note that it would probably be better to allocate socket
123 * and PCB at the same time, but I'm not convinced that all
124 * the protocols can be easily modified to do this.
125 *
126 * soalloc() returns a socket with a ref count of 0.
127 */
128struct socket *
129soalloc(waitok)
130 int waitok;
131{
132 struct socket *so;
133#ifdef MAC
134 int error;
135#endif
136 int flag;
137
138 if (waitok == 1)
139 flag = M_WAITOK;
140 else
141 flag = M_NOWAIT;
142 flag |= M_ZERO;
143 so = uma_zalloc(socket_zone, flag);
144 if (so) {
145#ifdef MAC
146 error = mac_init_socket(so, flag);
147 if (error != 0) {
148 uma_zfree(socket_zone, so);
149 so = NULL;
150 return so;
151 }
152#endif
153 /* XXX race condition for reentrant kernel */
154 so->so_gencnt = ++so_gencnt;
155 /* sx_init(&so->so_sxlock, "socket sxlock"); */
156 TAILQ_INIT(&so->so_aiojobq);
157 ++numopensockets;
158 }
159 return so;
160}
161
162/*
163 * socreate returns a socket with a ref count of 1. The socket should be
164 * closed with soclose().
165 */
166int
167socreate(dom, aso, type, proto, cred, td)
168 int dom;
169 struct socket **aso;
|
170 register int type;
| 170 int type;
|
171 int proto;
172 struct ucred *cred;
173 struct thread *td;
174{
| 171 int proto;
172 struct ucred *cred;
173 struct thread *td;
174{
|
175 register struct protosw *prp;
176 register struct socket *so;
177 register int error;
| 175 struct protosw *prp;
176 struct socket *so;
177 int error;
|
178
179 if (proto)
180 prp = pffindproto(dom, proto, type);
181 else
182 prp = pffindtype(dom, type);
183
184 if (prp == 0 || prp->pr_usrreqs->pru_attach == 0)
185 return (EPROTONOSUPPORT);
186
187 if (jailed(cred) && jail_socket_unixiproute_only &&
188 prp->pr_domain->dom_family != PF_LOCAL &&
189 prp->pr_domain->dom_family != PF_INET &&
190 prp->pr_domain->dom_family != PF_ROUTE) {
191 return (EPROTONOSUPPORT);
192 }
193
194 if (prp->pr_type != type)
195 return (EPROTOTYPE);
196 so = soalloc(M_NOWAIT);
197 if (so == NULL)
198 return (ENOBUFS);
199
200 TAILQ_INIT(&so->so_incomp);
201 TAILQ_INIT(&so->so_comp);
202 so->so_type = type;
203 so->so_cred = crhold(cred);
204 so->so_proto = prp;
205#ifdef MAC
206 mac_create_socket(cred, so);
207#endif
208 soref(so);
209 error = (*prp->pr_usrreqs->pru_attach)(so, proto, td);
210 if (error) {
211 so->so_state |= SS_NOFDREF;
212 sorele(so);
213 return (error);
214 }
215 *aso = so;
216 return (0);
217}
218
219int
220sobind(so, nam, td)
221 struct socket *so;
222 struct sockaddr *nam;
223 struct thread *td;
224{
225 int s = splnet();
226 int error;
227
228 error = (*so->so_proto->pr_usrreqs->pru_bind)(so, nam, td);
229 splx(s);
230 return (error);
231}
232
233void
234sodealloc(struct socket *so)
235{
236
237 KASSERT(so->so_count == 0, ("sodealloc(): so_count %d", so->so_count));
238 so->so_gencnt = ++so_gencnt;
239 if (so->so_rcv.sb_hiwat)
240 (void)chgsbsize(so->so_cred->cr_uidinfo,
241 &so->so_rcv.sb_hiwat, 0, RLIM_INFINITY);
242 if (so->so_snd.sb_hiwat)
243 (void)chgsbsize(so->so_cred->cr_uidinfo,
244 &so->so_snd.sb_hiwat, 0, RLIM_INFINITY);
245#ifdef INET
246 /* remove acccept filter if one is present. */
247 if (so->so_accf != NULL)
248 do_setopt_accept_filter(so, NULL);
249#endif
250#ifdef MAC
251 mac_destroy_socket(so);
252#endif
253 crfree(so->so_cred);
254 /* sx_destroy(&so->so_sxlock); */
255 uma_zfree(socket_zone, so);
256 --numopensockets;
257}
258
259int
260solisten(so, backlog, td)
| 178
179 if (proto)
180 prp = pffindproto(dom, proto, type);
181 else
182 prp = pffindtype(dom, type);
183
184 if (prp == 0 || prp->pr_usrreqs->pru_attach == 0)
185 return (EPROTONOSUPPORT);
186
187 if (jailed(cred) && jail_socket_unixiproute_only &&
188 prp->pr_domain->dom_family != PF_LOCAL &&
189 prp->pr_domain->dom_family != PF_INET &&
190 prp->pr_domain->dom_family != PF_ROUTE) {
191 return (EPROTONOSUPPORT);
192 }
193
194 if (prp->pr_type != type)
195 return (EPROTOTYPE);
196 so = soalloc(M_NOWAIT);
197 if (so == NULL)
198 return (ENOBUFS);
199
200 TAILQ_INIT(&so->so_incomp);
201 TAILQ_INIT(&so->so_comp);
202 so->so_type = type;
203 so->so_cred = crhold(cred);
204 so->so_proto = prp;
205#ifdef MAC
206 mac_create_socket(cred, so);
207#endif
208 soref(so);
209 error = (*prp->pr_usrreqs->pru_attach)(so, proto, td);
210 if (error) {
211 so->so_state |= SS_NOFDREF;
212 sorele(so);
213 return (error);
214 }
215 *aso = so;
216 return (0);
217}
218
219int
220sobind(so, nam, td)
221 struct socket *so;
222 struct sockaddr *nam;
223 struct thread *td;
224{
225 int s = splnet();
226 int error;
227
228 error = (*so->so_proto->pr_usrreqs->pru_bind)(so, nam, td);
229 splx(s);
230 return (error);
231}
232
233void
234sodealloc(struct socket *so)
235{
236
237 KASSERT(so->so_count == 0, ("sodealloc(): so_count %d", so->so_count));
238 so->so_gencnt = ++so_gencnt;
239 if (so->so_rcv.sb_hiwat)
240 (void)chgsbsize(so->so_cred->cr_uidinfo,
241 &so->so_rcv.sb_hiwat, 0, RLIM_INFINITY);
242 if (so->so_snd.sb_hiwat)
243 (void)chgsbsize(so->so_cred->cr_uidinfo,
244 &so->so_snd.sb_hiwat, 0, RLIM_INFINITY);
245#ifdef INET
246 /* remove acccept filter if one is present. */
247 if (so->so_accf != NULL)
248 do_setopt_accept_filter(so, NULL);
249#endif
250#ifdef MAC
251 mac_destroy_socket(so);
252#endif
253 crfree(so->so_cred);
254 /* sx_destroy(&so->so_sxlock); */
255 uma_zfree(socket_zone, so);
256 --numopensockets;
257}
258
259int
260solisten(so, backlog, td)
|
261 register struct socket *so;
| 261 struct socket *so;
|
262 int backlog;
263 struct thread *td;
264{
265 int s, error;
266
267 s = splnet();
268 if (so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) {
269 splx(s);
270 return (EINVAL);
271 }
272 error = (*so->so_proto->pr_usrreqs->pru_listen)(so, td);
273 if (error) {
274 splx(s);
275 return (error);
276 }
277 if (TAILQ_EMPTY(&so->so_comp))
278 so->so_options |= SO_ACCEPTCONN;
279 if (backlog < 0 || backlog > somaxconn)
280 backlog = somaxconn;
281 so->so_qlimit = backlog;
282 splx(s);
283 return (0);
284}
285
286void
287sofree(so)
| 262 int backlog;
263 struct thread *td;
264{
265 int s, error;
266
267 s = splnet();
268 if (so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) {
269 splx(s);
270 return (EINVAL);
271 }
272 error = (*so->so_proto->pr_usrreqs->pru_listen)(so, td);
273 if (error) {
274 splx(s);
275 return (error);
276 }
277 if (TAILQ_EMPTY(&so->so_comp))
278 so->so_options |= SO_ACCEPTCONN;
279 if (backlog < 0 || backlog > somaxconn)
280 backlog = somaxconn;
281 so->so_qlimit = backlog;
282 splx(s);
283 return (0);
284}
285
286void
287sofree(so)
|
288 register struct socket *so;
| 288 struct socket *so;
|
289{
290 struct socket *head = so->so_head;
291
292 KASSERT(so->so_count == 0, ("socket %p so_count not 0", so));
293
294 if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
295 return;
296 if (head != NULL) {
297 if (so->so_state & SS_INCOMP) {
298 TAILQ_REMOVE(&head->so_incomp, so, so_list);
299 head->so_incqlen--;
300 } else if (so->so_state & SS_COMP) {
301 /*
302 * We must not decommission a socket that's
303 * on the accept(2) queue. If we do, then
304 * accept(2) may hang after select(2) indicated
305 * that the listening socket was ready.
306 */
307 return;
308 } else {
309 panic("sofree: not queued");
310 }
311 so->so_state &= ~SS_INCOMP;
312 so->so_head = NULL;
313 }
314 sbrelease(&so->so_snd, so);
315 sorflush(so);
316 sodealloc(so);
317}
318
319/*
320 * Close a socket on last file table reference removal.
321 * Initiate disconnect if connected.
322 * Free socket when disconnect complete.
323 *
324 * This function will sorele() the socket. Note that soclose() may be
325 * called prior to the ref count reaching zero. The actual socket
326 * structure will not be freed until the ref count reaches zero.
327 */
328int
329soclose(so)
| 289{
290 struct socket *head = so->so_head;
291
292 KASSERT(so->so_count == 0, ("socket %p so_count not 0", so));
293
294 if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
295 return;
296 if (head != NULL) {
297 if (so->so_state & SS_INCOMP) {
298 TAILQ_REMOVE(&head->so_incomp, so, so_list);
299 head->so_incqlen--;
300 } else if (so->so_state & SS_COMP) {
301 /*
302 * We must not decommission a socket that's
303 * on the accept(2) queue. If we do, then
304 * accept(2) may hang after select(2) indicated
305 * that the listening socket was ready.
306 */
307 return;
308 } else {
309 panic("sofree: not queued");
310 }
311 so->so_state &= ~SS_INCOMP;
312 so->so_head = NULL;
313 }
314 sbrelease(&so->so_snd, so);
315 sorflush(so);
316 sodealloc(so);
317}
318
319/*
320 * Close a socket on last file table reference removal.
321 * Initiate disconnect if connected.
322 * Free socket when disconnect complete.
323 *
324 * This function will sorele() the socket. Note that soclose() may be
325 * called prior to the ref count reaching zero. The actual socket
326 * structure will not be freed until the ref count reaches zero.
327 */
328int
329soclose(so)
|
330 register struct socket *so;
| 330 struct socket *so;
|
331{
332 int s = splnet(); /* conservative */
333 int error = 0;
334
335 funsetown(&so->so_sigio);
336 if (so->so_options & SO_ACCEPTCONN) {
337 struct socket *sp, *sonext;
338
339 sp = TAILQ_FIRST(&so->so_incomp);
340 for (; sp != NULL; sp = sonext) {
341 sonext = TAILQ_NEXT(sp, so_list);
342 (void) soabort(sp);
343 }
344 for (sp = TAILQ_FIRST(&so->so_comp); sp != NULL; sp = sonext) {
345 sonext = TAILQ_NEXT(sp, so_list);
346 /* Dequeue from so_comp since sofree() won't do it */
347 TAILQ_REMOVE(&so->so_comp, sp, so_list);
348 so->so_qlen--;
349 sp->so_state &= ~SS_COMP;
350 sp->so_head = NULL;
351 (void) soabort(sp);
352 }
353 }
354 if (so->so_pcb == 0)
355 goto discard;
356 if (so->so_state & SS_ISCONNECTED) {
357 if ((so->so_state & SS_ISDISCONNECTING) == 0) {
358 error = sodisconnect(so);
359 if (error)
360 goto drop;
361 }
362 if (so->so_options & SO_LINGER) {
363 if ((so->so_state & SS_ISDISCONNECTING) &&
364 (so->so_state & SS_NBIO))
365 goto drop;
366 while (so->so_state & SS_ISCONNECTED) {
367 error = tsleep(&so->so_timeo,
368 PSOCK | PCATCH, "soclos", so->so_linger * hz);
369 if (error)
370 break;
371 }
372 }
373 }
374drop:
375 if (so->so_pcb) {
376 int error2 = (*so->so_proto->pr_usrreqs->pru_detach)(so);
377 if (error == 0)
378 error = error2;
379 }
380discard:
381 if (so->so_state & SS_NOFDREF)
382 panic("soclose: NOFDREF");
383 so->so_state |= SS_NOFDREF;
384 sorele(so);
385 splx(s);
386 return (error);
387}
388
389/*
390 * Must be called at splnet...
391 */
392int
393soabort(so)
394 struct socket *so;
395{
396 int error;
397
398 error = (*so->so_proto->pr_usrreqs->pru_abort)(so);
399 if (error) {
400 sotryfree(so); /* note: does not decrement the ref count */
401 return error;
402 }
403 return (0);
404}
405
406int
407soaccept(so, nam)
| 331{
332 int s = splnet(); /* conservative */
333 int error = 0;
334
335 funsetown(&so->so_sigio);
336 if (so->so_options & SO_ACCEPTCONN) {
337 struct socket *sp, *sonext;
338
339 sp = TAILQ_FIRST(&so->so_incomp);
340 for (; sp != NULL; sp = sonext) {
341 sonext = TAILQ_NEXT(sp, so_list);
342 (void) soabort(sp);
343 }
344 for (sp = TAILQ_FIRST(&so->so_comp); sp != NULL; sp = sonext) {
345 sonext = TAILQ_NEXT(sp, so_list);
346 /* Dequeue from so_comp since sofree() won't do it */
347 TAILQ_REMOVE(&so->so_comp, sp, so_list);
348 so->so_qlen--;
349 sp->so_state &= ~SS_COMP;
350 sp->so_head = NULL;
351 (void) soabort(sp);
352 }
353 }
354 if (so->so_pcb == 0)
355 goto discard;
356 if (so->so_state & SS_ISCONNECTED) {
357 if ((so->so_state & SS_ISDISCONNECTING) == 0) {
358 error = sodisconnect(so);
359 if (error)
360 goto drop;
361 }
362 if (so->so_options & SO_LINGER) {
363 if ((so->so_state & SS_ISDISCONNECTING) &&
364 (so->so_state & SS_NBIO))
365 goto drop;
366 while (so->so_state & SS_ISCONNECTED) {
367 error = tsleep(&so->so_timeo,
368 PSOCK | PCATCH, "soclos", so->so_linger * hz);
369 if (error)
370 break;
371 }
372 }
373 }
374drop:
375 if (so->so_pcb) {
376 int error2 = (*so->so_proto->pr_usrreqs->pru_detach)(so);
377 if (error == 0)
378 error = error2;
379 }
380discard:
381 if (so->so_state & SS_NOFDREF)
382 panic("soclose: NOFDREF");
383 so->so_state |= SS_NOFDREF;
384 sorele(so);
385 splx(s);
386 return (error);
387}
388
389/*
390 * Must be called at splnet...
391 */
392int
393soabort(so)
394 struct socket *so;
395{
396 int error;
397
398 error = (*so->so_proto->pr_usrreqs->pru_abort)(so);
399 if (error) {
400 sotryfree(so); /* note: does not decrement the ref count */
401 return error;
402 }
403 return (0);
404}
405
406int
407soaccept(so, nam)
|
408 register struct socket *so;
| 408 struct socket *so;
|
409 struct sockaddr **nam;
410{
411 int s = splnet();
412 int error;
413
414 if ((so->so_state & SS_NOFDREF) == 0)
415 panic("soaccept: !NOFDREF");
416 so->so_state &= ~SS_NOFDREF;
417 error = (*so->so_proto->pr_usrreqs->pru_accept)(so, nam);
418 splx(s);
419 return (error);
420}
421
422int
423soconnect(so, nam, td)
| 409 struct sockaddr **nam;
410{
411 int s = splnet();
412 int error;
413
414 if ((so->so_state & SS_NOFDREF) == 0)
415 panic("soaccept: !NOFDREF");
416 so->so_state &= ~SS_NOFDREF;
417 error = (*so->so_proto->pr_usrreqs->pru_accept)(so, nam);
418 splx(s);
419 return (error);
420}
421
422int
423soconnect(so, nam, td)
|
424 register struct socket *so;
| 424 struct socket *so;
|
425 struct sockaddr *nam;
426 struct thread *td;
427{
428 int s;
429 int error;
430
431 if (so->so_options & SO_ACCEPTCONN)
432 return (EOPNOTSUPP);
433 s = splnet();
434 /*
435 * If protocol is connection-based, can only connect once.
436 * Otherwise, if connected, try to disconnect first.
437 * This allows user to disconnect by connecting to, e.g.,
438 * a null address.
439 */
440 if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
441 ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
442 (error = sodisconnect(so))))
443 error = EISCONN;
444 else
445 error = (*so->so_proto->pr_usrreqs->pru_connect)(so, nam, td);
446 splx(s);
447 return (error);
448}
449
450int
451soconnect2(so1, so2)
| 425 struct sockaddr *nam;
426 struct thread *td;
427{
428 int s;
429 int error;
430
431 if (so->so_options & SO_ACCEPTCONN)
432 return (EOPNOTSUPP);
433 s = splnet();
434 /*
435 * If protocol is connection-based, can only connect once.
436 * Otherwise, if connected, try to disconnect first.
437 * This allows user to disconnect by connecting to, e.g.,
438 * a null address.
439 */
440 if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
441 ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
442 (error = sodisconnect(so))))
443 error = EISCONN;
444 else
445 error = (*so->so_proto->pr_usrreqs->pru_connect)(so, nam, td);
446 splx(s);
447 return (error);
448}
449
450int
451soconnect2(so1, so2)
|
452 register struct socket *so1;
| 452 struct socket *so1;
|
453 struct socket *so2;
454{
455 int s = splnet();
456 int error;
457
458 error = (*so1->so_proto->pr_usrreqs->pru_connect2)(so1, so2);
459 splx(s);
460 return (error);
461}
462
463int
464sodisconnect(so)
| 453 struct socket *so2;
454{
455 int s = splnet();
456 int error;
457
458 error = (*so1->so_proto->pr_usrreqs->pru_connect2)(so1, so2);
459 splx(s);
460 return (error);
461}
462
463int
464sodisconnect(so)
|
465 register struct socket *so;
| 465 struct socket *so;
|
466{
467 int s = splnet();
468 int error;
469
470 if ((so->so_state & SS_ISCONNECTED) == 0) {
471 error = ENOTCONN;
472 goto bad;
473 }
474 if (so->so_state & SS_ISDISCONNECTING) {
475 error = EALREADY;
476 goto bad;
477 }
478 error = (*so->so_proto->pr_usrreqs->pru_disconnect)(so);
479bad:
480 splx(s);
481 return (error);
482}
483
484#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
485/*
486 * Send on a socket.
487 * If send must go all at once and message is larger than
488 * send buffering, then hard error.
489 * Lock against other senders.
490 * If must go all at once and not enough room now, then
491 * inform user that this would block and do nothing.
492 * Otherwise, if nonblocking, send as much as possible.
493 * The data to be sent is described by "uio" if nonzero,
494 * otherwise by the mbuf chain "top" (which must be null
495 * if uio is not). Data provided in mbuf chain must be small
496 * enough to send all at once.
497 *
498 * Returns nonzero on error, timeout or signal; callers
499 * must check for short counts if EINTR/ERESTART are returned.
500 * Data and control buffers are freed on return.
501 */
502
503#ifdef ZERO_COPY_SOCKETS
504struct so_zerocopy_stats{
505 int size_ok;
506 int align_ok;
507 int found_ifp;
508};
509struct so_zerocopy_stats so_zerocp_stats = {0,0,0};
510#include <netinet/in.h>
511#include <net/route.h>
512#include <netinet/in_pcb.h>
513#include <vm/vm.h>
514#include <vm/vm_page.h>
515#include <vm/vm_object.h>
516#endif /*ZERO_COPY_SOCKETS*/
517
518int
519sosend(so, addr, uio, top, control, flags, td)
| 466{
467 int s = splnet();
468 int error;
469
470 if ((so->so_state & SS_ISCONNECTED) == 0) {
471 error = ENOTCONN;
472 goto bad;
473 }
474 if (so->so_state & SS_ISDISCONNECTING) {
475 error = EALREADY;
476 goto bad;
477 }
478 error = (*so->so_proto->pr_usrreqs->pru_disconnect)(so);
479bad:
480 splx(s);
481 return (error);
482}
483
484#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
485/*
486 * Send on a socket.
487 * If send must go all at once and message is larger than
488 * send buffering, then hard error.
489 * Lock against other senders.
490 * If must go all at once and not enough room now, then
491 * inform user that this would block and do nothing.
492 * Otherwise, if nonblocking, send as much as possible.
493 * The data to be sent is described by "uio" if nonzero,
494 * otherwise by the mbuf chain "top" (which must be null
495 * if uio is not). Data provided in mbuf chain must be small
496 * enough to send all at once.
497 *
498 * Returns nonzero on error, timeout or signal; callers
499 * must check for short counts if EINTR/ERESTART are returned.
500 * Data and control buffers are freed on return.
501 */
502
503#ifdef ZERO_COPY_SOCKETS
504struct so_zerocopy_stats{
505 int size_ok;
506 int align_ok;
507 int found_ifp;
508};
509struct so_zerocopy_stats so_zerocp_stats = {0,0,0};
510#include <netinet/in.h>
511#include <net/route.h>
512#include <netinet/in_pcb.h>
513#include <vm/vm.h>
514#include <vm/vm_page.h>
515#include <vm/vm_object.h>
516#endif /*ZERO_COPY_SOCKETS*/
517
518int
519sosend(so, addr, uio, top, control, flags, td)
|
520 register struct socket *so;
| 520 struct socket *so;
|
521 struct sockaddr *addr;
522 struct uio *uio;
523 struct mbuf *top;
524 struct mbuf *control;
525 int flags;
526 struct thread *td;
527{
528 struct mbuf **mp;
| 521 struct sockaddr *addr;
522 struct uio *uio;
523 struct mbuf *top;
524 struct mbuf *control;
525 int flags;
526 struct thread *td;
527{
528 struct mbuf **mp;
|
529 register struct mbuf *m;
530 register long space, len, resid;
| 529 struct mbuf *m;
530 long space, len, resid;
|
531 int clen = 0, error, s, dontroute, mlen;
532 int atomic = sosendallatonce(so) || top;
533#ifdef ZERO_COPY_SOCKETS
534 int cow_send;
535#endif /* ZERO_COPY_SOCKETS */
536
537 if (uio)
538 resid = uio->uio_resid;
539 else
540 resid = top->m_pkthdr.len;
541 /*
542 * In theory resid should be unsigned.
543 * However, space must be signed, as it might be less than 0
544 * if we over-committed, and we must use a signed comparison
545 * of space and resid. On the other hand, a negative resid
546 * causes us to loop sending 0-length segments to the protocol.
547 *
548 * Also check to make sure that MSG_EOR isn't used on SOCK_STREAM
549 * type sockets since that's an error.
550 */
551 if (resid < 0 || (so->so_type == SOCK_STREAM && (flags & MSG_EOR))) {
552 error = EINVAL;
553 goto out;
554 }
555
556 dontroute =
557 (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
558 (so->so_proto->pr_flags & PR_ATOMIC);
559 if (td)
560 td->td_proc->p_stats->p_ru.ru_msgsnd++;
561 if (control)
562 clen = control->m_len;
563#define snderr(errno) { error = (errno); splx(s); goto release; }
564
565restart:
566 error = sblock(&so->so_snd, SBLOCKWAIT(flags));
567 if (error)
568 goto out;
569 do {
570 s = splnet();
571 if (so->so_state & SS_CANTSENDMORE)
572 snderr(EPIPE);
573 if (so->so_error) {
574 error = so->so_error;
575 so->so_error = 0;
576 splx(s);
577 goto release;
578 }
579 if ((so->so_state & SS_ISCONNECTED) == 0) {
580 /*
581 * `sendto' and `sendmsg' is allowed on a connection-
582 * based socket if it supports implied connect.
583 * Return ENOTCONN if not connected and no address is
584 * supplied.
585 */
586 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) &&
587 (so->so_proto->pr_flags & PR_IMPLOPCL) == 0) {
588 if ((so->so_state & SS_ISCONFIRMING) == 0 &&
589 !(resid == 0 && clen != 0))
590 snderr(ENOTCONN);
591 } else if (addr == 0)
592 snderr(so->so_proto->pr_flags & PR_CONNREQUIRED ?
593 ENOTCONN : EDESTADDRREQ);
594 }
595 space = sbspace(&so->so_snd);
596 if (flags & MSG_OOB)
597 space += 1024;
598 if ((atomic && resid > so->so_snd.sb_hiwat) ||
599 clen > so->so_snd.sb_hiwat)
600 snderr(EMSGSIZE);
601 if (space < resid + clen &&
602 (atomic || space < so->so_snd.sb_lowat || space < clen)) {
603 if (so->so_state & SS_NBIO)
604 snderr(EWOULDBLOCK);
605 sbunlock(&so->so_snd);
606 error = sbwait(&so->so_snd);
607 splx(s);
608 if (error)
609 goto out;
610 goto restart;
611 }
612 splx(s);
613 mp = ⊤
614 space -= clen;
615 do {
616 if (uio == NULL) {
617 /*
618 * Data is prepackaged in "top".
619 */
620 resid = 0;
621 if (flags & MSG_EOR)
622 top->m_flags |= M_EOR;
623 } else do {
624#ifdef ZERO_COPY_SOCKETS
625 cow_send = 0;
626#endif /* ZERO_COPY_SOCKETS */
627 if (top == 0) {
628 MGETHDR(m, M_TRYWAIT, MT_DATA);
629 if (m == NULL) {
630 error = ENOBUFS;
631 goto release;
632 }
633 mlen = MHLEN;
634 m->m_pkthdr.len = 0;
635 m->m_pkthdr.rcvif = (struct ifnet *)0;
636 } else {
637 MGET(m, M_TRYWAIT, MT_DATA);
638 if (m == NULL) {
639 error = ENOBUFS;
640 goto release;
641 }
642 mlen = MLEN;
643 }
644 if (resid >= MINCLSIZE) {
| 531 int clen = 0, error, s, dontroute, mlen;
532 int atomic = sosendallatonce(so) || top;
533#ifdef ZERO_COPY_SOCKETS
534 int cow_send;
535#endif /* ZERO_COPY_SOCKETS */
536
537 if (uio)
538 resid = uio->uio_resid;
539 else
540 resid = top->m_pkthdr.len;
541 /*
542 * In theory resid should be unsigned.
543 * However, space must be signed, as it might be less than 0
544 * if we over-committed, and we must use a signed comparison
545 * of space and resid. On the other hand, a negative resid
546 * causes us to loop sending 0-length segments to the protocol.
547 *
548 * Also check to make sure that MSG_EOR isn't used on SOCK_STREAM
549 * type sockets since that's an error.
550 */
551 if (resid < 0 || (so->so_type == SOCK_STREAM && (flags & MSG_EOR))) {
552 error = EINVAL;
553 goto out;
554 }
555
556 dontroute =
557 (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
558 (so->so_proto->pr_flags & PR_ATOMIC);
559 if (td)
560 td->td_proc->p_stats->p_ru.ru_msgsnd++;
561 if (control)
562 clen = control->m_len;
563#define snderr(errno) { error = (errno); splx(s); goto release; }
564
565restart:
566 error = sblock(&so->so_snd, SBLOCKWAIT(flags));
567 if (error)
568 goto out;
569 do {
570 s = splnet();
571 if (so->so_state & SS_CANTSENDMORE)
572 snderr(EPIPE);
573 if (so->so_error) {
574 error = so->so_error;
575 so->so_error = 0;
576 splx(s);
577 goto release;
578 }
579 if ((so->so_state & SS_ISCONNECTED) == 0) {
580 /*
581 * `sendto' and `sendmsg' is allowed on a connection-
582 * based socket if it supports implied connect.
583 * Return ENOTCONN if not connected and no address is
584 * supplied.
585 */
586 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) &&
587 (so->so_proto->pr_flags & PR_IMPLOPCL) == 0) {
588 if ((so->so_state & SS_ISCONFIRMING) == 0 &&
589 !(resid == 0 && clen != 0))
590 snderr(ENOTCONN);
591 } else if (addr == 0)
592 snderr(so->so_proto->pr_flags & PR_CONNREQUIRED ?
593 ENOTCONN : EDESTADDRREQ);
594 }
595 space = sbspace(&so->so_snd);
596 if (flags & MSG_OOB)
597 space += 1024;
598 if ((atomic && resid > so->so_snd.sb_hiwat) ||
599 clen > so->so_snd.sb_hiwat)
600 snderr(EMSGSIZE);
601 if (space < resid + clen &&
602 (atomic || space < so->so_snd.sb_lowat || space < clen)) {
603 if (so->so_state & SS_NBIO)
604 snderr(EWOULDBLOCK);
605 sbunlock(&so->so_snd);
606 error = sbwait(&so->so_snd);
607 splx(s);
608 if (error)
609 goto out;
610 goto restart;
611 }
612 splx(s);
613 mp = ⊤
614 space -= clen;
615 do {
616 if (uio == NULL) {
617 /*
618 * Data is prepackaged in "top".
619 */
620 resid = 0;
621 if (flags & MSG_EOR)
622 top->m_flags |= M_EOR;
623 } else do {
624#ifdef ZERO_COPY_SOCKETS
625 cow_send = 0;
626#endif /* ZERO_COPY_SOCKETS */
627 if (top == 0) {
628 MGETHDR(m, M_TRYWAIT, MT_DATA);
629 if (m == NULL) {
630 error = ENOBUFS;
631 goto release;
632 }
633 mlen = MHLEN;
634 m->m_pkthdr.len = 0;
635 m->m_pkthdr.rcvif = (struct ifnet *)0;
636 } else {
637 MGET(m, M_TRYWAIT, MT_DATA);
638 if (m == NULL) {
639 error = ENOBUFS;
640 goto release;
641 }
642 mlen = MLEN;
643 }
644 if (resid >= MINCLSIZE) {
|
645#ifdef ZERO_COPY_SOCKETS
| 645#ifdef ZERO_COPY_SOCKETS
|
646 if (so_zero_copy_send &&
| 646 if (so_zero_copy_send &&
|
647 resid>=PAGE_SIZE &&
648 space>=PAGE_SIZE &&
| 647 resid>=PAGE_SIZE &&
648 space>=PAGE_SIZE &&
|
649 uio->uio_iov->iov_len>=PAGE_SIZE) {
650 so_zerocp_stats.size_ok++;
651 if (!((vm_offset_t)
652 uio->uio_iov->iov_base & PAGE_MASK)){
653 so_zerocp_stats.align_ok++;
654 cow_send = socow_setup(m, uio);
655 }
| 649 uio->uio_iov->iov_len>=PAGE_SIZE) {
650 so_zerocp_stats.size_ok++;
651 if (!((vm_offset_t)
652 uio->uio_iov->iov_base & PAGE_MASK)){
653 so_zerocp_stats.align_ok++;
654 cow_send = socow_setup(m, uio);
655 }
|
656 }
| 656 }
|
657 if (!cow_send){
658#endif /* ZERO_COPY_SOCKETS */
659 MCLGET(m, M_TRYWAIT);
660 if ((m->m_flags & M_EXT) == 0)
661 goto nopages;
662 mlen = MCLBYTES;
663 len = min(min(mlen, resid), space);
664 } else {
665#ifdef ZERO_COPY_SOCKETS
666 len = PAGE_SIZE;
667 }
| 657 if (!cow_send){
658#endif /* ZERO_COPY_SOCKETS */
659 MCLGET(m, M_TRYWAIT);
660 if ((m->m_flags & M_EXT) == 0)
661 goto nopages;
662 mlen = MCLBYTES;
663 len = min(min(mlen, resid), space);
664 } else {
665#ifdef ZERO_COPY_SOCKETS
666 len = PAGE_SIZE;
667 }
|
668
| 668
|
669 } else {
670#endif /* ZERO_COPY_SOCKETS */
671nopages:
672 len = min(min(mlen, resid), space);
673 /*
674 * For datagram protocols, leave room
675 * for protocol headers in first mbuf.
676 */
677 if (atomic && top == 0 && len < mlen)
678 MH_ALIGN(m, len);
679 }
680 space -= len;
681#ifdef ZERO_COPY_SOCKETS
682 if (cow_send)
683 error = 0;
684 else
685#endif /* ZERO_COPY_SOCKETS */
686 error = uiomove(mtod(m, void *), (int)len, uio);
687 resid = uio->uio_resid;
688 m->m_len = len;
689 *mp = m;
690 top->m_pkthdr.len += len;
691 if (error)
692 goto release;
693 mp = &m->m_next;
694 if (resid <= 0) {
695 if (flags & MSG_EOR)
696 top->m_flags |= M_EOR;
697 break;
698 }
699 } while (space > 0 && atomic);
700 if (dontroute)
701 so->so_options |= SO_DONTROUTE;
702 s = splnet(); /* XXX */
703 /*
704 * XXX all the SS_CANTSENDMORE checks previously
705 * done could be out of date. We could have recieved
706 * a reset packet in an interrupt or maybe we slept
707 * while doing page faults in uiomove() etc. We could
708 * probably recheck again inside the splnet() protection
709 * here, but there are probably other places that this
710 * also happens. We must rethink this.
711 */
712 error = (*so->so_proto->pr_usrreqs->pru_send)(so,
713 (flags & MSG_OOB) ? PRUS_OOB :
714 /*
715 * If the user set MSG_EOF, the protocol
716 * understands this flag and nothing left to
717 * send then use PRU_SEND_EOF instead of PRU_SEND.
718 */
719 ((flags & MSG_EOF) &&
720 (so->so_proto->pr_flags & PR_IMPLOPCL) &&
721 (resid <= 0)) ?
722 PRUS_EOF :
723 /* If there is more to send set PRUS_MORETOCOME */
724 (resid > 0 && space > 0) ? PRUS_MORETOCOME : 0,
725 top, addr, control, td);
726 splx(s);
727 if (dontroute)
728 so->so_options &= ~SO_DONTROUTE;
729 clen = 0;
730 control = 0;
731 top = 0;
732 mp = ⊤
733 if (error)
734 goto release;
735 } while (resid && space > 0);
736 } while (resid);
737
738release:
739 sbunlock(&so->so_snd);
740out:
741 if (top)
742 m_freem(top);
743 if (control)
744 m_freem(control);
745 return (error);
746}
747
748/*
749 * Implement receive operations on a socket.
750 * We depend on the way that records are added to the sockbuf
751 * by sbappend*. In particular, each record (mbufs linked through m_next)
752 * must begin with an address if the protocol so specifies,
753 * followed by an optional mbuf or mbufs containing ancillary data,
754 * and then zero or more mbufs of data.
755 * In order to avoid blocking network interrupts for the entire time here,
756 * we splx() while doing the actual copy to user space.
757 * Although the sockbuf is locked, new data may still be appended,
758 * and thus we must maintain consistency of the sockbuf during that time.
759 *
760 * The caller may receive the data as a single mbuf chain by supplying
761 * an mbuf **mp0 for use in returning the chain. The uio is then used
762 * only for the count in uio_resid.
763 */
764int
765soreceive(so, psa, uio, mp0, controlp, flagsp)
| 669 } else {
670#endif /* ZERO_COPY_SOCKETS */
671nopages:
672 len = min(min(mlen, resid), space);
673 /*
674 * For datagram protocols, leave room
675 * for protocol headers in first mbuf.
676 */
677 if (atomic && top == 0 && len < mlen)
678 MH_ALIGN(m, len);
679 }
680 space -= len;
681#ifdef ZERO_COPY_SOCKETS
682 if (cow_send)
683 error = 0;
684 else
685#endif /* ZERO_COPY_SOCKETS */
686 error = uiomove(mtod(m, void *), (int)len, uio);
687 resid = uio->uio_resid;
688 m->m_len = len;
689 *mp = m;
690 top->m_pkthdr.len += len;
691 if (error)
692 goto release;
693 mp = &m->m_next;
694 if (resid <= 0) {
695 if (flags & MSG_EOR)
696 top->m_flags |= M_EOR;
697 break;
698 }
699 } while (space > 0 && atomic);
700 if (dontroute)
701 so->so_options |= SO_DONTROUTE;
702 s = splnet(); /* XXX */
703 /*
704 * XXX all the SS_CANTSENDMORE checks previously
705 * done could be out of date. We could have recieved
706 * a reset packet in an interrupt or maybe we slept
707 * while doing page faults in uiomove() etc. We could
708 * probably recheck again inside the splnet() protection
709 * here, but there are probably other places that this
710 * also happens. We must rethink this.
711 */
712 error = (*so->so_proto->pr_usrreqs->pru_send)(so,
713 (flags & MSG_OOB) ? PRUS_OOB :
714 /*
715 * If the user set MSG_EOF, the protocol
716 * understands this flag and nothing left to
717 * send then use PRU_SEND_EOF instead of PRU_SEND.
718 */
719 ((flags & MSG_EOF) &&
720 (so->so_proto->pr_flags & PR_IMPLOPCL) &&
721 (resid <= 0)) ?
722 PRUS_EOF :
723 /* If there is more to send set PRUS_MORETOCOME */
724 (resid > 0 && space > 0) ? PRUS_MORETOCOME : 0,
725 top, addr, control, td);
726 splx(s);
727 if (dontroute)
728 so->so_options &= ~SO_DONTROUTE;
729 clen = 0;
730 control = 0;
731 top = 0;
732 mp = ⊤
733 if (error)
734 goto release;
735 } while (resid && space > 0);
736 } while (resid);
737
738release:
739 sbunlock(&so->so_snd);
740out:
741 if (top)
742 m_freem(top);
743 if (control)
744 m_freem(control);
745 return (error);
746}
747
748/*
749 * Implement receive operations on a socket.
750 * We depend on the way that records are added to the sockbuf
751 * by sbappend*. In particular, each record (mbufs linked through m_next)
752 * must begin with an address if the protocol so specifies,
753 * followed by an optional mbuf or mbufs containing ancillary data,
754 * and then zero or more mbufs of data.
755 * In order to avoid blocking network interrupts for the entire time here,
756 * we splx() while doing the actual copy to user space.
757 * Although the sockbuf is locked, new data may still be appended,
758 * and thus we must maintain consistency of the sockbuf during that time.
759 *
760 * The caller may receive the data as a single mbuf chain by supplying
761 * an mbuf **mp0 for use in returning the chain. The uio is then used
762 * only for the count in uio_resid.
763 */
764int
765soreceive(so, psa, uio, mp0, controlp, flagsp)
|
766 register struct socket *so;
| 766 struct socket *so;
|
767 struct sockaddr **psa;
768 struct uio *uio;
769 struct mbuf **mp0;
770 struct mbuf **controlp;
771 int *flagsp;
772{
773 struct mbuf *m, **mp;
| 767 struct sockaddr **psa;
768 struct uio *uio;
769 struct mbuf **mp0;
770 struct mbuf **controlp;
771 int *flagsp;
772{
773 struct mbuf *m, **mp;
|
774 register int flags, len, error, s, offset;
| 774 int flags, len, error, s, offset;
|
775 struct protosw *pr = so->so_proto;
776 struct mbuf *nextrecord;
777 int moff, type = 0;
778 int orig_resid = uio->uio_resid;
779
780 mp = mp0;
781 if (psa)
782 *psa = 0;
783 if (controlp)
784 *controlp = 0;
785 if (flagsp)
786 flags = *flagsp &~ MSG_EOR;
787 else
788 flags = 0;
789 if (flags & MSG_OOB) {
790 m = m_get(M_TRYWAIT, MT_DATA);
791 if (m == NULL)
792 return (ENOBUFS);
793 error = (*pr->pr_usrreqs->pru_rcvoob)(so, m, flags & MSG_PEEK);
794 if (error)
795 goto bad;
796 do {
797#ifdef ZERO_COPY_SOCKETS
798 if (so_zero_copy_receive) {
799 vm_page_t pg;
800 int disposable;
801
802 if ((m->m_flags & M_EXT)
803 && (m->m_ext.ext_type == EXT_DISPOSABLE))
804 disposable = 1;
805 else
806 disposable = 0;
807
808 pg = PHYS_TO_VM_PAGE(vtophys(mtod(m, caddr_t)));
809 if (uio->uio_offset == -1)
810 uio->uio_offset =IDX_TO_OFF(pg->pindex);
811
812 error = uiomoveco(mtod(m, void *),
813 min(uio->uio_resid, m->m_len),
814 uio, pg->object,
815 disposable);
816 } else
817#endif /* ZERO_COPY_SOCKETS */
818 error = uiomove(mtod(m, void *),
819 (int) min(uio->uio_resid, m->m_len), uio);
820 m = m_free(m);
821 } while (uio->uio_resid && error == 0 && m);
822bad:
823 if (m)
824 m_freem(m);
825 return (error);
826 }
827 if (mp)
828 *mp = (struct mbuf *)0;
829 if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
830 (*pr->pr_usrreqs->pru_rcvd)(so, 0);
831
832restart:
833 error = sblock(&so->so_rcv, SBLOCKWAIT(flags));
834 if (error)
835 return (error);
836 s = splnet();
837
838 m = so->so_rcv.sb_mb;
839 /*
840 * If we have less data than requested, block awaiting more
841 * (subject to any timeout) if:
842 * 1. the current count is less than the low water mark, or
843 * 2. MSG_WAITALL is set, and it is possible to do the entire
844 * receive operation at once if we block (resid <= hiwat).
845 * 3. MSG_DONTWAIT is not set
846 * If MSG_WAITALL is set but resid is larger than the receive buffer,
847 * we have to do the receive in sections, and thus risk returning
848 * a short count if a timeout or signal occurs after we start.
849 */
850 if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
851 so->so_rcv.sb_cc < uio->uio_resid) &&
852 (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
853 ((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
854 m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
855 KASSERT(m != 0 || !so->so_rcv.sb_cc,
856 ("receive: m == %p so->so_rcv.sb_cc == %u",
857 m, so->so_rcv.sb_cc));
858 if (so->so_error) {
859 if (m)
860 goto dontblock;
861 error = so->so_error;
862 if ((flags & MSG_PEEK) == 0)
863 so->so_error = 0;
864 goto release;
865 }
866 if (so->so_state & SS_CANTRCVMORE) {
867 if (m)
868 goto dontblock;
869 else
870 goto release;
871 }
872 for (; m; m = m->m_next)
873 if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
874 m = so->so_rcv.sb_mb;
875 goto dontblock;
876 }
877 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
878 (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
879 error = ENOTCONN;
880 goto release;
881 }
882 if (uio->uio_resid == 0)
883 goto release;
884 if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
885 error = EWOULDBLOCK;
886 goto release;
887 }
888 sbunlock(&so->so_rcv);
889 error = sbwait(&so->so_rcv);
890 splx(s);
891 if (error)
892 return (error);
893 goto restart;
894 }
895dontblock:
896 if (uio->uio_td)
897 uio->uio_td->td_proc->p_stats->p_ru.ru_msgrcv++;
898 nextrecord = m->m_nextpkt;
899 if (pr->pr_flags & PR_ADDR) {
900 KASSERT(m->m_type == MT_SONAME,
901 ("m->m_type == %d", m->m_type));
902 orig_resid = 0;
903 if (psa)
904 *psa = dup_sockaddr(mtod(m, struct sockaddr *),
905 mp0 == 0);
906 if (flags & MSG_PEEK) {
907 m = m->m_next;
908 } else {
909 sbfree(&so->so_rcv, m);
910 so->so_rcv.sb_mb = m_free(m);
911 m = so->so_rcv.sb_mb;
912 }
913 }
914 while (m && m->m_type == MT_CONTROL && error == 0) {
915 if (flags & MSG_PEEK) {
916 if (controlp)
917 *controlp = m_copy(m, 0, m->m_len);
918 m = m->m_next;
919 } else {
920 sbfree(&so->so_rcv, m);
921 so->so_rcv.sb_mb = m->m_next;
922 m->m_next = NULL;
923 if (pr->pr_domain->dom_externalize)
924 error =
925 (*pr->pr_domain->dom_externalize)(m, controlp);
926 else if (controlp)
927 *controlp = m;
928 else
929 m_freem(m);
930 m = so->so_rcv.sb_mb;
931 }
932 if (controlp) {
933 orig_resid = 0;
934 do
935 controlp = &(*controlp)->m_next;
936 while (*controlp != NULL);
937 }
938 }
939 if (m) {
940 if ((flags & MSG_PEEK) == 0)
941 m->m_nextpkt = nextrecord;
942 type = m->m_type;
943 if (type == MT_OOBDATA)
944 flags |= MSG_OOB;
945 }
946 moff = 0;
947 offset = 0;
948 while (m && uio->uio_resid > 0 && error == 0) {
949 if (m->m_type == MT_OOBDATA) {
950 if (type != MT_OOBDATA)
951 break;
952 } else if (type == MT_OOBDATA)
953 break;
954 else
955 KASSERT(m->m_type == MT_DATA || m->m_type == MT_HEADER,
956 ("m->m_type == %d", m->m_type));
957 so->so_state &= ~SS_RCVATMARK;
958 len = uio->uio_resid;
959 if (so->so_oobmark && len > so->so_oobmark - offset)
960 len = so->so_oobmark - offset;
961 if (len > m->m_len - moff)
962 len = m->m_len - moff;
963 /*
964 * If mp is set, just pass back the mbufs.
965 * Otherwise copy them out via the uio, then free.
966 * Sockbuf must be consistent here (points to current mbuf,
967 * it points to next record) when we drop priority;
968 * we must note any additions to the sockbuf when we
969 * block interrupts again.
970 */
971 if (mp == 0) {
972 splx(s);
973#ifdef ZERO_COPY_SOCKETS
974 if (so_zero_copy_receive) {
975 vm_page_t pg;
976 int disposable;
977
978 if ((m->m_flags & M_EXT)
979 && (m->m_ext.ext_type == EXT_DISPOSABLE))
980 disposable = 1;
981 else
982 disposable = 0;
| 775 struct protosw *pr = so->so_proto;
776 struct mbuf *nextrecord;
777 int moff, type = 0;
778 int orig_resid = uio->uio_resid;
779
780 mp = mp0;
781 if (psa)
782 *psa = 0;
783 if (controlp)
784 *controlp = 0;
785 if (flagsp)
786 flags = *flagsp &~ MSG_EOR;
787 else
788 flags = 0;
789 if (flags & MSG_OOB) {
790 m = m_get(M_TRYWAIT, MT_DATA);
791 if (m == NULL)
792 return (ENOBUFS);
793 error = (*pr->pr_usrreqs->pru_rcvoob)(so, m, flags & MSG_PEEK);
794 if (error)
795 goto bad;
796 do {
797#ifdef ZERO_COPY_SOCKETS
798 if (so_zero_copy_receive) {
799 vm_page_t pg;
800 int disposable;
801
802 if ((m->m_flags & M_EXT)
803 && (m->m_ext.ext_type == EXT_DISPOSABLE))
804 disposable = 1;
805 else
806 disposable = 0;
807
808 pg = PHYS_TO_VM_PAGE(vtophys(mtod(m, caddr_t)));
809 if (uio->uio_offset == -1)
810 uio->uio_offset =IDX_TO_OFF(pg->pindex);
811
812 error = uiomoveco(mtod(m, void *),
813 min(uio->uio_resid, m->m_len),
814 uio, pg->object,
815 disposable);
816 } else
817#endif /* ZERO_COPY_SOCKETS */
818 error = uiomove(mtod(m, void *),
819 (int) min(uio->uio_resid, m->m_len), uio);
820 m = m_free(m);
821 } while (uio->uio_resid && error == 0 && m);
822bad:
823 if (m)
824 m_freem(m);
825 return (error);
826 }
827 if (mp)
828 *mp = (struct mbuf *)0;
829 if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
830 (*pr->pr_usrreqs->pru_rcvd)(so, 0);
831
832restart:
833 error = sblock(&so->so_rcv, SBLOCKWAIT(flags));
834 if (error)
835 return (error);
836 s = splnet();
837
838 m = so->so_rcv.sb_mb;
839 /*
840 * If we have less data than requested, block awaiting more
841 * (subject to any timeout) if:
842 * 1. the current count is less than the low water mark, or
843 * 2. MSG_WAITALL is set, and it is possible to do the entire
844 * receive operation at once if we block (resid <= hiwat).
845 * 3. MSG_DONTWAIT is not set
846 * If MSG_WAITALL is set but resid is larger than the receive buffer,
847 * we have to do the receive in sections, and thus risk returning
848 * a short count if a timeout or signal occurs after we start.
849 */
850 if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
851 so->so_rcv.sb_cc < uio->uio_resid) &&
852 (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
853 ((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
854 m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
855 KASSERT(m != 0 || !so->so_rcv.sb_cc,
856 ("receive: m == %p so->so_rcv.sb_cc == %u",
857 m, so->so_rcv.sb_cc));
858 if (so->so_error) {
859 if (m)
860 goto dontblock;
861 error = so->so_error;
862 if ((flags & MSG_PEEK) == 0)
863 so->so_error = 0;
864 goto release;
865 }
866 if (so->so_state & SS_CANTRCVMORE) {
867 if (m)
868 goto dontblock;
869 else
870 goto release;
871 }
872 for (; m; m = m->m_next)
873 if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
874 m = so->so_rcv.sb_mb;
875 goto dontblock;
876 }
877 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
878 (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
879 error = ENOTCONN;
880 goto release;
881 }
882 if (uio->uio_resid == 0)
883 goto release;
884 if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
885 error = EWOULDBLOCK;
886 goto release;
887 }
888 sbunlock(&so->so_rcv);
889 error = sbwait(&so->so_rcv);
890 splx(s);
891 if (error)
892 return (error);
893 goto restart;
894 }
895dontblock:
896 if (uio->uio_td)
897 uio->uio_td->td_proc->p_stats->p_ru.ru_msgrcv++;
898 nextrecord = m->m_nextpkt;
899 if (pr->pr_flags & PR_ADDR) {
900 KASSERT(m->m_type == MT_SONAME,
901 ("m->m_type == %d", m->m_type));
902 orig_resid = 0;
903 if (psa)
904 *psa = dup_sockaddr(mtod(m, struct sockaddr *),
905 mp0 == 0);
906 if (flags & MSG_PEEK) {
907 m = m->m_next;
908 } else {
909 sbfree(&so->so_rcv, m);
910 so->so_rcv.sb_mb = m_free(m);
911 m = so->so_rcv.sb_mb;
912 }
913 }
914 while (m && m->m_type == MT_CONTROL && error == 0) {
915 if (flags & MSG_PEEK) {
916 if (controlp)
917 *controlp = m_copy(m, 0, m->m_len);
918 m = m->m_next;
919 } else {
920 sbfree(&so->so_rcv, m);
921 so->so_rcv.sb_mb = m->m_next;
922 m->m_next = NULL;
923 if (pr->pr_domain->dom_externalize)
924 error =
925 (*pr->pr_domain->dom_externalize)(m, controlp);
926 else if (controlp)
927 *controlp = m;
928 else
929 m_freem(m);
930 m = so->so_rcv.sb_mb;
931 }
932 if (controlp) {
933 orig_resid = 0;
934 do
935 controlp = &(*controlp)->m_next;
936 while (*controlp != NULL);
937 }
938 }
939 if (m) {
940 if ((flags & MSG_PEEK) == 0)
941 m->m_nextpkt = nextrecord;
942 type = m->m_type;
943 if (type == MT_OOBDATA)
944 flags |= MSG_OOB;
945 }
946 moff = 0;
947 offset = 0;
948 while (m && uio->uio_resid > 0 && error == 0) {
949 if (m->m_type == MT_OOBDATA) {
950 if (type != MT_OOBDATA)
951 break;
952 } else if (type == MT_OOBDATA)
953 break;
954 else
955 KASSERT(m->m_type == MT_DATA || m->m_type == MT_HEADER,
956 ("m->m_type == %d", m->m_type));
957 so->so_state &= ~SS_RCVATMARK;
958 len = uio->uio_resid;
959 if (so->so_oobmark && len > so->so_oobmark - offset)
960 len = so->so_oobmark - offset;
961 if (len > m->m_len - moff)
962 len = m->m_len - moff;
963 /*
964 * If mp is set, just pass back the mbufs.
965 * Otherwise copy them out via the uio, then free.
966 * Sockbuf must be consistent here (points to current mbuf,
967 * it points to next record) when we drop priority;
968 * we must note any additions to the sockbuf when we
969 * block interrupts again.
970 */
971 if (mp == 0) {
972 splx(s);
973#ifdef ZERO_COPY_SOCKETS
974 if (so_zero_copy_receive) {
975 vm_page_t pg;
976 int disposable;
977
978 if ((m->m_flags & M_EXT)
979 && (m->m_ext.ext_type == EXT_DISPOSABLE))
980 disposable = 1;
981 else
982 disposable = 0;
|
983
| 983
|
984 pg = PHYS_TO_VM_PAGE(vtophys(mtod(m, caddr_t) +
985 moff));
986
987 if (uio->uio_offset == -1)
988 uio->uio_offset =IDX_TO_OFF(pg->pindex);
989
990 error = uiomoveco(mtod(m, char *) + moff,
991 (int)len, uio,pg->object,
992 disposable);
993 } else
994#endif /* ZERO_COPY_SOCKETS */
995 error = uiomove(mtod(m, char *) + moff, (int)len, uio);
996 s = splnet();
997 if (error)
998 goto release;
999 } else
1000 uio->uio_resid -= len;
1001 if (len == m->m_len - moff) {
1002 if (m->m_flags & M_EOR)
1003 flags |= MSG_EOR;
1004 if (flags & MSG_PEEK) {
1005 m = m->m_next;
1006 moff = 0;
1007 } else {
1008 nextrecord = m->m_nextpkt;
1009 sbfree(&so->so_rcv, m);
1010 if (mp) {
1011 *mp = m;
1012 mp = &m->m_next;
1013 so->so_rcv.sb_mb = m = m->m_next;
1014 *mp = (struct mbuf *)0;
1015 } else {
1016 so->so_rcv.sb_mb = m_free(m);
1017 m = so->so_rcv.sb_mb;
1018 }
1019 if (m)
1020 m->m_nextpkt = nextrecord;
1021 }
1022 } else {
1023 if (flags & MSG_PEEK)
1024 moff += len;
1025 else {
1026 if (mp)
1027 *mp = m_copym(m, 0, len, M_TRYWAIT);
1028 m->m_data += len;
1029 m->m_len -= len;
1030 so->so_rcv.sb_cc -= len;
1031 }
1032 }
1033 if (so->so_oobmark) {
1034 if ((flags & MSG_PEEK) == 0) {
1035 so->so_oobmark -= len;
1036 if (so->so_oobmark == 0) {
1037 so->so_state |= SS_RCVATMARK;
1038 break;
1039 }
1040 } else {
1041 offset += len;
1042 if (offset == so->so_oobmark)
1043 break;
1044 }
1045 }
1046 if (flags & MSG_EOR)
1047 break;
1048 /*
1049 * If the MSG_WAITALL flag is set (for non-atomic socket),
1050 * we must not quit until "uio->uio_resid == 0" or an error
1051 * termination. If a signal/timeout occurs, return
1052 * with a short count but without error.
1053 * Keep sockbuf locked against other readers.
1054 */
1055 while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
1056 !sosendallatonce(so) && !nextrecord) {
1057 if (so->so_error || so->so_state & SS_CANTRCVMORE)
1058 break;
1059 /*
1060 * Notify the protocol that some data has been
1061 * drained before blocking.
1062 */
1063 if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1064 (*pr->pr_usrreqs->pru_rcvd)(so, flags);
1065 error = sbwait(&so->so_rcv);
1066 if (error) {
1067 sbunlock(&so->so_rcv);
1068 splx(s);
1069 return (0);
1070 }
1071 m = so->so_rcv.sb_mb;
1072 if (m)
1073 nextrecord = m->m_nextpkt;
1074 }
1075 }
1076
1077 if (m && pr->pr_flags & PR_ATOMIC) {
1078 flags |= MSG_TRUNC;
1079 if ((flags & MSG_PEEK) == 0)
1080 (void) sbdroprecord(&so->so_rcv);
1081 }
1082 if ((flags & MSG_PEEK) == 0) {
1083 if (m == 0)
1084 so->so_rcv.sb_mb = nextrecord;
1085 if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1086 (*pr->pr_usrreqs->pru_rcvd)(so, flags);
1087 }
1088 if (orig_resid == uio->uio_resid && orig_resid &&
1089 (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1090 sbunlock(&so->so_rcv);
1091 splx(s);
1092 goto restart;
1093 }
1094
1095 if (flagsp)
1096 *flagsp |= flags;
1097release:
1098 sbunlock(&so->so_rcv);
1099 splx(s);
1100 return (error);
1101}
1102
1103int
1104soshutdown(so, how)
| 984 pg = PHYS_TO_VM_PAGE(vtophys(mtod(m, caddr_t) +
985 moff));
986
987 if (uio->uio_offset == -1)
988 uio->uio_offset =IDX_TO_OFF(pg->pindex);
989
990 error = uiomoveco(mtod(m, char *) + moff,
991 (int)len, uio,pg->object,
992 disposable);
993 } else
994#endif /* ZERO_COPY_SOCKETS */
995 error = uiomove(mtod(m, char *) + moff, (int)len, uio);
996 s = splnet();
997 if (error)
998 goto release;
999 } else
1000 uio->uio_resid -= len;
1001 if (len == m->m_len - moff) {
1002 if (m->m_flags & M_EOR)
1003 flags |= MSG_EOR;
1004 if (flags & MSG_PEEK) {
1005 m = m->m_next;
1006 moff = 0;
1007 } else {
1008 nextrecord = m->m_nextpkt;
1009 sbfree(&so->so_rcv, m);
1010 if (mp) {
1011 *mp = m;
1012 mp = &m->m_next;
1013 so->so_rcv.sb_mb = m = m->m_next;
1014 *mp = (struct mbuf *)0;
1015 } else {
1016 so->so_rcv.sb_mb = m_free(m);
1017 m = so->so_rcv.sb_mb;
1018 }
1019 if (m)
1020 m->m_nextpkt = nextrecord;
1021 }
1022 } else {
1023 if (flags & MSG_PEEK)
1024 moff += len;
1025 else {
1026 if (mp)
1027 *mp = m_copym(m, 0, len, M_TRYWAIT);
1028 m->m_data += len;
1029 m->m_len -= len;
1030 so->so_rcv.sb_cc -= len;
1031 }
1032 }
1033 if (so->so_oobmark) {
1034 if ((flags & MSG_PEEK) == 0) {
1035 so->so_oobmark -= len;
1036 if (so->so_oobmark == 0) {
1037 so->so_state |= SS_RCVATMARK;
1038 break;
1039 }
1040 } else {
1041 offset += len;
1042 if (offset == so->so_oobmark)
1043 break;
1044 }
1045 }
1046 if (flags & MSG_EOR)
1047 break;
1048 /*
1049 * If the MSG_WAITALL flag is set (for non-atomic socket),
1050 * we must not quit until "uio->uio_resid == 0" or an error
1051 * termination. If a signal/timeout occurs, return
1052 * with a short count but without error.
1053 * Keep sockbuf locked against other readers.
1054 */
1055 while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
1056 !sosendallatonce(so) && !nextrecord) {
1057 if (so->so_error || so->so_state & SS_CANTRCVMORE)
1058 break;
1059 /*
1060 * Notify the protocol that some data has been
1061 * drained before blocking.
1062 */
1063 if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1064 (*pr->pr_usrreqs->pru_rcvd)(so, flags);
1065 error = sbwait(&so->so_rcv);
1066 if (error) {
1067 sbunlock(&so->so_rcv);
1068 splx(s);
1069 return (0);
1070 }
1071 m = so->so_rcv.sb_mb;
1072 if (m)
1073 nextrecord = m->m_nextpkt;
1074 }
1075 }
1076
1077 if (m && pr->pr_flags & PR_ATOMIC) {
1078 flags |= MSG_TRUNC;
1079 if ((flags & MSG_PEEK) == 0)
1080 (void) sbdroprecord(&so->so_rcv);
1081 }
1082 if ((flags & MSG_PEEK) == 0) {
1083 if (m == 0)
1084 so->so_rcv.sb_mb = nextrecord;
1085 if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1086 (*pr->pr_usrreqs->pru_rcvd)(so, flags);
1087 }
1088 if (orig_resid == uio->uio_resid && orig_resid &&
1089 (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1090 sbunlock(&so->so_rcv);
1091 splx(s);
1092 goto restart;
1093 }
1094
1095 if (flagsp)
1096 *flagsp |= flags;
1097release:
1098 sbunlock(&so->so_rcv);
1099 splx(s);
1100 return (error);
1101}
1102
1103int
1104soshutdown(so, how)
|
1105 register struct socket *so;
1106 register int how;
| 1105 struct socket *so;
1106 int how;
|
1107{
| 1107{
|
1108 register struct protosw *pr = so->so_proto;
| 1108 struct protosw *pr = so->so_proto;
|
1109
1110 if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1111 return (EINVAL);
1112
1113 if (how != SHUT_WR)
1114 sorflush(so);
1115 if (how != SHUT_RD)
1116 return ((*pr->pr_usrreqs->pru_shutdown)(so));
1117 return (0);
1118}
1119
1120void
1121sorflush(so)
| 1109
1110 if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1111 return (EINVAL);
1112
1113 if (how != SHUT_WR)
1114 sorflush(so);
1115 if (how != SHUT_RD)
1116 return ((*pr->pr_usrreqs->pru_shutdown)(so));
1117 return (0);
1118}
1119
1120void
1121sorflush(so)
|
1122 register struct socket *so;
| 1122 struct socket *so;
|
1123{
| 1123{
|
1124 register struct sockbuf *sb = &so->so_rcv;
1125 register struct protosw *pr = so->so_proto;
1126 register int s;
| 1124 struct sockbuf *sb = &so->so_rcv;
1125 struct protosw *pr = so->so_proto;
1126 int s;
|
1127 struct sockbuf asb;
1128
1129 sb->sb_flags |= SB_NOINTR;
1130 (void) sblock(sb, M_WAITOK);
1131 s = splimp();
1132 socantrcvmore(so);
1133 sbunlock(sb);
1134 asb = *sb;
1135 bzero(sb, sizeof (*sb));
1136 splx(s);
1137 if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1138 (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1139 sbrelease(&asb, so);
1140}
1141
1142#ifdef INET
1143static int
1144do_setopt_accept_filter(so, sopt)
1145 struct socket *so;
1146 struct sockopt *sopt;
1147{
1148 struct accept_filter_arg *afap = NULL;
1149 struct accept_filter *afp;
1150 struct so_accf *af = so->so_accf;
1151 int error = 0;
1152
1153 /* do not set/remove accept filters on non listen sockets */
1154 if ((so->so_options & SO_ACCEPTCONN) == 0) {
1155 error = EINVAL;
1156 goto out;
1157 }
1158
1159 /* removing the filter */
1160 if (sopt == NULL) {
1161 if (af != NULL) {
1162 if (af->so_accept_filter != NULL &&
1163 af->so_accept_filter->accf_destroy != NULL) {
1164 af->so_accept_filter->accf_destroy(so);
1165 }
1166 if (af->so_accept_filter_str != NULL) {
1167 FREE(af->so_accept_filter_str, M_ACCF);
1168 }
1169 FREE(af, M_ACCF);
1170 so->so_accf = NULL;
1171 }
1172 so->so_options &= ~SO_ACCEPTFILTER;
1173 return (0);
1174 }
1175 /* adding a filter */
1176 /* must remove previous filter first */
1177 if (af != NULL) {
1178 error = EINVAL;
1179 goto out;
1180 }
1181 /* don't put large objects on the kernel stack */
1182 MALLOC(afap, struct accept_filter_arg *, sizeof(*afap), M_TEMP, M_WAITOK);
1183 error = sooptcopyin(sopt, afap, sizeof *afap, sizeof *afap);
1184 afap->af_name[sizeof(afap->af_name)-1] = '\0';
1185 afap->af_arg[sizeof(afap->af_arg)-1] = '\0';
1186 if (error)
1187 goto out;
1188 afp = accept_filt_get(afap->af_name);
1189 if (afp == NULL) {
1190 error = ENOENT;
1191 goto out;
1192 }
1193 MALLOC(af, struct so_accf *, sizeof(*af), M_ACCF, M_WAITOK | M_ZERO);
1194 if (afp->accf_create != NULL) {
1195 if (afap->af_name[0] != '\0') {
1196 int len = strlen(afap->af_name) + 1;
1197
1198 MALLOC(af->so_accept_filter_str, char *, len, M_ACCF, M_WAITOK);
1199 strcpy(af->so_accept_filter_str, afap->af_name);
1200 }
1201 af->so_accept_filter_arg = afp->accf_create(so, afap->af_arg);
1202 if (af->so_accept_filter_arg == NULL) {
1203 FREE(af->so_accept_filter_str, M_ACCF);
1204 FREE(af, M_ACCF);
1205 so->so_accf = NULL;
1206 error = EINVAL;
1207 goto out;
1208 }
1209 }
1210 af->so_accept_filter = afp;
1211 so->so_accf = af;
1212 so->so_options |= SO_ACCEPTFILTER;
1213out:
1214 if (afap != NULL)
1215 FREE(afap, M_TEMP);
1216 return (error);
1217}
1218#endif /* INET */
1219
1220/*
1221 * Perhaps this routine, and sooptcopyout(), below, ought to come in
1222 * an additional variant to handle the case where the option value needs
1223 * to be some kind of integer, but not a specific size.
1224 * In addition to their use here, these functions are also called by the
1225 * protocol-level pr_ctloutput() routines.
1226 */
1227int
1228sooptcopyin(sopt, buf, len, minlen)
1229 struct sockopt *sopt;
1230 void *buf;
1231 size_t len;
1232 size_t minlen;
1233{
1234 size_t valsize;
1235
1236 /*
1237 * If the user gives us more than we wanted, we ignore it,
1238 * but if we don't get the minimum length the caller
1239 * wants, we return EINVAL. On success, sopt->sopt_valsize
1240 * is set to however much we actually retrieved.
1241 */
1242 if ((valsize = sopt->sopt_valsize) < minlen)
1243 return EINVAL;
1244 if (valsize > len)
1245 sopt->sopt_valsize = valsize = len;
1246
1247 if (sopt->sopt_td != 0)
1248 return (copyin(sopt->sopt_val, buf, valsize));
1249
1250 bcopy(sopt->sopt_val, buf, valsize);
1251 return 0;
1252}
1253
1254int
1255sosetopt(so, sopt)
1256 struct socket *so;
1257 struct sockopt *sopt;
1258{
1259 int error, optval;
1260 struct linger l;
1261 struct timeval tv;
1262 u_long val;
1263#ifdef MAC
1264 struct mac extmac;
1265#endif
1266
1267 error = 0;
1268 if (sopt->sopt_level != SOL_SOCKET) {
1269 if (so->so_proto && so->so_proto->pr_ctloutput)
1270 return ((*so->so_proto->pr_ctloutput)
1271 (so, sopt));
1272 error = ENOPROTOOPT;
1273 } else {
1274 switch (sopt->sopt_name) {
1275#ifdef INET
1276 case SO_ACCEPTFILTER:
1277 error = do_setopt_accept_filter(so, sopt);
1278 if (error)
1279 goto bad;
1280 break;
1281#endif
1282 case SO_LINGER:
1283 error = sooptcopyin(sopt, &l, sizeof l, sizeof l);
1284 if (error)
1285 goto bad;
1286
1287 so->so_linger = l.l_linger;
1288 if (l.l_onoff)
1289 so->so_options |= SO_LINGER;
1290 else
1291 so->so_options &= ~SO_LINGER;
1292 break;
1293
1294 case SO_DEBUG:
1295 case SO_KEEPALIVE:
1296 case SO_DONTROUTE:
1297 case SO_USELOOPBACK:
1298 case SO_BROADCAST:
1299 case SO_REUSEADDR:
1300 case SO_REUSEPORT:
1301 case SO_OOBINLINE:
1302 case SO_TIMESTAMP:
1303 case SO_NOSIGPIPE:
1304 error = sooptcopyin(sopt, &optval, sizeof optval,
1305 sizeof optval);
1306 if (error)
1307 goto bad;
1308 if (optval)
1309 so->so_options |= sopt->sopt_name;
1310 else
1311 so->so_options &= ~sopt->sopt_name;
1312 break;
1313
1314 case SO_SNDBUF:
1315 case SO_RCVBUF:
1316 case SO_SNDLOWAT:
1317 case SO_RCVLOWAT:
1318 error = sooptcopyin(sopt, &optval, sizeof optval,
1319 sizeof optval);
1320 if (error)
1321 goto bad;
1322
1323 /*
1324 * Values < 1 make no sense for any of these
1325 * options, so disallow them.
1326 */
1327 if (optval < 1) {
1328 error = EINVAL;
1329 goto bad;
1330 }
1331
1332 switch (sopt->sopt_name) {
1333 case SO_SNDBUF:
1334 case SO_RCVBUF:
1335 if (sbreserve(sopt->sopt_name == SO_SNDBUF ?
1336 &so->so_snd : &so->so_rcv, (u_long)optval,
1337 so, curthread) == 0) {
1338 error = ENOBUFS;
1339 goto bad;
1340 }
1341 break;
1342
1343 /*
1344 * Make sure the low-water is never greater than
1345 * the high-water.
1346 */
1347 case SO_SNDLOWAT:
1348 so->so_snd.sb_lowat =
1349 (optval > so->so_snd.sb_hiwat) ?
1350 so->so_snd.sb_hiwat : optval;
1351 break;
1352 case SO_RCVLOWAT:
1353 so->so_rcv.sb_lowat =
1354 (optval > so->so_rcv.sb_hiwat) ?
1355 so->so_rcv.sb_hiwat : optval;
1356 break;
1357 }
1358 break;
1359
1360 case SO_SNDTIMEO:
1361 case SO_RCVTIMEO:
1362 error = sooptcopyin(sopt, &tv, sizeof tv,
1363 sizeof tv);
1364 if (error)
1365 goto bad;
1366
1367 /* assert(hz > 0); */
1368 if (tv.tv_sec < 0 || tv.tv_sec > SHRT_MAX / hz ||
1369 tv.tv_usec < 0 || tv.tv_usec >= 1000000) {
1370 error = EDOM;
1371 goto bad;
1372 }
1373 /* assert(tick > 0); */
1374 /* assert(ULONG_MAX - SHRT_MAX >= 1000000); */
1375 val = (u_long)(tv.tv_sec * hz) + tv.tv_usec / tick;
1376 if (val > SHRT_MAX) {
1377 error = EDOM;
1378 goto bad;
1379 }
1380 if (val == 0 && tv.tv_usec != 0)
1381 val = 1;
1382
1383 switch (sopt->sopt_name) {
1384 case SO_SNDTIMEO:
1385 so->so_snd.sb_timeo = val;
1386 break;
1387 case SO_RCVTIMEO:
1388 so->so_rcv.sb_timeo = val;
1389 break;
1390 }
1391 break;
1392 case SO_LABEL:
1393#ifdef MAC
1394 error = sooptcopyin(sopt, &extmac, sizeof extmac,
1395 sizeof extmac);
1396 if (error)
1397 goto bad;
1398
1399 error = mac_setsockopt_label_set(
1400 sopt->sopt_td->td_ucred, so, &extmac);
1401
1402#else
1403 error = EOPNOTSUPP;
1404#endif
1405 break;
1406 default:
1407 error = ENOPROTOOPT;
1408 break;
1409 }
1410 if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
1411 (void) ((*so->so_proto->pr_ctloutput)
1412 (so, sopt));
1413 }
1414 }
1415bad:
1416 return (error);
1417}
1418
1419/* Helper routine for getsockopt */
1420int
1421sooptcopyout(sopt, buf, len)
1422 struct sockopt *sopt;
1423 void *buf;
1424 size_t len;
1425{
1426 int error;
1427 size_t valsize;
1428
1429 error = 0;
1430
1431 /*
1432 * Documented get behavior is that we always return a value,
1433 * possibly truncated to fit in the user's buffer.
1434 * Traditional behavior is that we always tell the user
1435 * precisely how much we copied, rather than something useful
1436 * like the total amount we had available for her.
1437 * Note that this interface is not idempotent; the entire answer must
1438 * generated ahead of time.
1439 */
1440 valsize = min(len, sopt->sopt_valsize);
1441 sopt->sopt_valsize = valsize;
1442 if (sopt->sopt_val != 0) {
1443 if (sopt->sopt_td != 0)
1444 error = copyout(buf, sopt->sopt_val, valsize);
1445 else
1446 bcopy(buf, sopt->sopt_val, valsize);
1447 }
1448 return error;
1449}
1450
1451int
1452sogetopt(so, sopt)
1453 struct socket *so;
1454 struct sockopt *sopt;
1455{
1456 int error, optval;
1457 struct linger l;
1458 struct timeval tv;
1459#ifdef INET
1460 struct accept_filter_arg *afap;
1461#endif
1462#ifdef MAC
1463 struct mac extmac;
1464#endif
1465
1466 error = 0;
1467 if (sopt->sopt_level != SOL_SOCKET) {
1468 if (so->so_proto && so->so_proto->pr_ctloutput) {
1469 return ((*so->so_proto->pr_ctloutput)
1470 (so, sopt));
1471 } else
1472 return (ENOPROTOOPT);
1473 } else {
1474 switch (sopt->sopt_name) {
1475#ifdef INET
1476 case SO_ACCEPTFILTER:
1477 if ((so->so_options & SO_ACCEPTCONN) == 0)
1478 return (EINVAL);
1479 MALLOC(afap, struct accept_filter_arg *, sizeof(*afap),
1480 M_TEMP, M_WAITOK | M_ZERO);
1481 if ((so->so_options & SO_ACCEPTFILTER) != 0) {
1482 strcpy(afap->af_name, so->so_accf->so_accept_filter->accf_name);
1483 if (so->so_accf->so_accept_filter_str != NULL)
1484 strcpy(afap->af_arg, so->so_accf->so_accept_filter_str);
1485 }
1486 error = sooptcopyout(sopt, afap, sizeof(*afap));
1487 FREE(afap, M_TEMP);
1488 break;
1489#endif
1490
1491 case SO_LINGER:
1492 l.l_onoff = so->so_options & SO_LINGER;
1493 l.l_linger = so->so_linger;
1494 error = sooptcopyout(sopt, &l, sizeof l);
1495 break;
1496
1497 case SO_USELOOPBACK:
1498 case SO_DONTROUTE:
1499 case SO_DEBUG:
1500 case SO_KEEPALIVE:
1501 case SO_REUSEADDR:
1502 case SO_REUSEPORT:
1503 case SO_BROADCAST:
1504 case SO_OOBINLINE:
1505 case SO_TIMESTAMP:
1506 case SO_NOSIGPIPE:
1507 optval = so->so_options & sopt->sopt_name;
1508integer:
1509 error = sooptcopyout(sopt, &optval, sizeof optval);
1510 break;
1511
1512 case SO_TYPE:
1513 optval = so->so_type;
1514 goto integer;
1515
1516 case SO_ERROR:
1517 optval = so->so_error;
1518 so->so_error = 0;
1519 goto integer;
1520
1521 case SO_SNDBUF:
1522 optval = so->so_snd.sb_hiwat;
1523 goto integer;
1524
1525 case SO_RCVBUF:
1526 optval = so->so_rcv.sb_hiwat;
1527 goto integer;
1528
1529 case SO_SNDLOWAT:
1530 optval = so->so_snd.sb_lowat;
1531 goto integer;
1532
1533 case SO_RCVLOWAT:
1534 optval = so->so_rcv.sb_lowat;
1535 goto integer;
1536
1537 case SO_SNDTIMEO:
1538 case SO_RCVTIMEO:
1539 optval = (sopt->sopt_name == SO_SNDTIMEO ?
1540 so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1541
1542 tv.tv_sec = optval / hz;
1543 tv.tv_usec = (optval % hz) * tick;
1544 error = sooptcopyout(sopt, &tv, sizeof tv);
1545 break;
1546 case SO_LABEL:
1547#ifdef MAC
1548 error = mac_getsockopt_label_get(
1549 sopt->sopt_td->td_ucred, so, &extmac);
1550 if (error)
1551 return (error);
1552 error = sooptcopyout(sopt, &extmac, sizeof extmac);
1553#else
1554 error = EOPNOTSUPP;
1555#endif
1556 break;
1557 case SO_PEERLABEL:
1558#ifdef MAC
1559 error = mac_getsockopt_peerlabel_get(
1560 sopt->sopt_td->td_ucred, so, &extmac);
1561 if (error)
1562 return (error);
1563 error = sooptcopyout(sopt, &extmac, sizeof extmac);
1564#else
1565 error = EOPNOTSUPP;
1566#endif
1567 break;
1568 default:
1569 error = ENOPROTOOPT;
1570 break;
1571 }
1572 return (error);
1573 }
1574}
1575
1576/* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */
1577int
1578soopt_getm(struct sockopt *sopt, struct mbuf **mp)
1579{
1580 struct mbuf *m, *m_prev;
1581 int sopt_size = sopt->sopt_valsize;
1582
1583 MGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT, MT_DATA);
1584 if (m == 0)
1585 return ENOBUFS;
1586 if (sopt_size > MLEN) {
1587 MCLGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT);
1588 if ((m->m_flags & M_EXT) == 0) {
1589 m_free(m);
1590 return ENOBUFS;
1591 }
1592 m->m_len = min(MCLBYTES, sopt_size);
1593 } else {
1594 m->m_len = min(MLEN, sopt_size);
1595 }
1596 sopt_size -= m->m_len;
1597 *mp = m;
1598 m_prev = m;
1599
1600 while (sopt_size) {
1601 MGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT, MT_DATA);
1602 if (m == 0) {
1603 m_freem(*mp);
1604 return ENOBUFS;
1605 }
1606 if (sopt_size > MLEN) {
1607 MCLGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT);
1608 if ((m->m_flags & M_EXT) == 0) {
1609 m_freem(*mp);
1610 return ENOBUFS;
1611 }
1612 m->m_len = min(MCLBYTES, sopt_size);
1613 } else {
1614 m->m_len = min(MLEN, sopt_size);
1615 }
1616 sopt_size -= m->m_len;
1617 m_prev->m_next = m;
1618 m_prev = m;
1619 }
1620 return 0;
1621}
1622
1623/* XXX; copyin sopt data into mbuf chain for (__FreeBSD__ < 3) routines. */
1624int
1625soopt_mcopyin(struct sockopt *sopt, struct mbuf *m)
1626{
1627 struct mbuf *m0 = m;
1628
1629 if (sopt->sopt_val == NULL)
1630 return 0;
1631 while (m != NULL && sopt->sopt_valsize >= m->m_len) {
1632 if (sopt->sopt_td != NULL) {
1633 int error;
1634
1635 error = copyin(sopt->sopt_val, mtod(m, char *),
1636 m->m_len);
1637 if (error != 0) {
1638 m_freem(m0);
1639 return(error);
1640 }
1641 } else
1642 bcopy(sopt->sopt_val, mtod(m, char *), m->m_len);
1643 sopt->sopt_valsize -= m->m_len;
1644 (caddr_t)sopt->sopt_val += m->m_len;
1645 m = m->m_next;
1646 }
1647 if (m != NULL) /* should be allocated enoughly at ip6_sooptmcopyin() */
1648 panic("ip6_sooptmcopyin");
1649 return 0;
1650}
1651
1652/* XXX; copyout mbuf chain data into soopt for (__FreeBSD__ < 3) routines. */
1653int
1654soopt_mcopyout(struct sockopt *sopt, struct mbuf *m)
1655{
1656 struct mbuf *m0 = m;
1657 size_t valsize = 0;
1658
1659 if (sopt->sopt_val == NULL)
1660 return 0;
1661 while (m != NULL && sopt->sopt_valsize >= m->m_len) {
1662 if (sopt->sopt_td != NULL) {
1663 int error;
1664
1665 error = copyout(mtod(m, char *), sopt->sopt_val,
1666 m->m_len);
1667 if (error != 0) {
1668 m_freem(m0);
1669 return(error);
1670 }
1671 } else
1672 bcopy(mtod(m, char *), sopt->sopt_val, m->m_len);
1673 sopt->sopt_valsize -= m->m_len;
1674 (caddr_t)sopt->sopt_val += m->m_len;
1675 valsize += m->m_len;
1676 m = m->m_next;
1677 }
1678 if (m != NULL) {
1679 /* enough soopt buffer should be given from user-land */
1680 m_freem(m0);
1681 return(EINVAL);
1682 }
1683 sopt->sopt_valsize = valsize;
1684 return 0;
1685}
1686
1687void
1688sohasoutofband(so)
| 1127 struct sockbuf asb;
1128
1129 sb->sb_flags |= SB_NOINTR;
1130 (void) sblock(sb, M_WAITOK);
1131 s = splimp();
1132 socantrcvmore(so);
1133 sbunlock(sb);
1134 asb = *sb;
1135 bzero(sb, sizeof (*sb));
1136 splx(s);
1137 if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1138 (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1139 sbrelease(&asb, so);
1140}
1141
1142#ifdef INET
1143static int
1144do_setopt_accept_filter(so, sopt)
1145 struct socket *so;
1146 struct sockopt *sopt;
1147{
1148 struct accept_filter_arg *afap = NULL;
1149 struct accept_filter *afp;
1150 struct so_accf *af = so->so_accf;
1151 int error = 0;
1152
1153 /* do not set/remove accept filters on non listen sockets */
1154 if ((so->so_options & SO_ACCEPTCONN) == 0) {
1155 error = EINVAL;
1156 goto out;
1157 }
1158
1159 /* removing the filter */
1160 if (sopt == NULL) {
1161 if (af != NULL) {
1162 if (af->so_accept_filter != NULL &&
1163 af->so_accept_filter->accf_destroy != NULL) {
1164 af->so_accept_filter->accf_destroy(so);
1165 }
1166 if (af->so_accept_filter_str != NULL) {
1167 FREE(af->so_accept_filter_str, M_ACCF);
1168 }
1169 FREE(af, M_ACCF);
1170 so->so_accf = NULL;
1171 }
1172 so->so_options &= ~SO_ACCEPTFILTER;
1173 return (0);
1174 }
1175 /* adding a filter */
1176 /* must remove previous filter first */
1177 if (af != NULL) {
1178 error = EINVAL;
1179 goto out;
1180 }
1181 /* don't put large objects on the kernel stack */
1182 MALLOC(afap, struct accept_filter_arg *, sizeof(*afap), M_TEMP, M_WAITOK);
1183 error = sooptcopyin(sopt, afap, sizeof *afap, sizeof *afap);
1184 afap->af_name[sizeof(afap->af_name)-1] = '\0';
1185 afap->af_arg[sizeof(afap->af_arg)-1] = '\0';
1186 if (error)
1187 goto out;
1188 afp = accept_filt_get(afap->af_name);
1189 if (afp == NULL) {
1190 error = ENOENT;
1191 goto out;
1192 }
1193 MALLOC(af, struct so_accf *, sizeof(*af), M_ACCF, M_WAITOK | M_ZERO);
1194 if (afp->accf_create != NULL) {
1195 if (afap->af_name[0] != '\0') {
1196 int len = strlen(afap->af_name) + 1;
1197
1198 MALLOC(af->so_accept_filter_str, char *, len, M_ACCF, M_WAITOK);
1199 strcpy(af->so_accept_filter_str, afap->af_name);
1200 }
1201 af->so_accept_filter_arg = afp->accf_create(so, afap->af_arg);
1202 if (af->so_accept_filter_arg == NULL) {
1203 FREE(af->so_accept_filter_str, M_ACCF);
1204 FREE(af, M_ACCF);
1205 so->so_accf = NULL;
1206 error = EINVAL;
1207 goto out;
1208 }
1209 }
1210 af->so_accept_filter = afp;
1211 so->so_accf = af;
1212 so->so_options |= SO_ACCEPTFILTER;
1213out:
1214 if (afap != NULL)
1215 FREE(afap, M_TEMP);
1216 return (error);
1217}
1218#endif /* INET */
1219
1220/*
1221 * Perhaps this routine, and sooptcopyout(), below, ought to come in
1222 * an additional variant to handle the case where the option value needs
1223 * to be some kind of integer, but not a specific size.
1224 * In addition to their use here, these functions are also called by the
1225 * protocol-level pr_ctloutput() routines.
1226 */
1227int
1228sooptcopyin(sopt, buf, len, minlen)
1229 struct sockopt *sopt;
1230 void *buf;
1231 size_t len;
1232 size_t minlen;
1233{
1234 size_t valsize;
1235
1236 /*
1237 * If the user gives us more than we wanted, we ignore it,
1238 * but if we don't get the minimum length the caller
1239 * wants, we return EINVAL. On success, sopt->sopt_valsize
1240 * is set to however much we actually retrieved.
1241 */
1242 if ((valsize = sopt->sopt_valsize) < minlen)
1243 return EINVAL;
1244 if (valsize > len)
1245 sopt->sopt_valsize = valsize = len;
1246
1247 if (sopt->sopt_td != 0)
1248 return (copyin(sopt->sopt_val, buf, valsize));
1249
1250 bcopy(sopt->sopt_val, buf, valsize);
1251 return 0;
1252}
1253
1254int
1255sosetopt(so, sopt)
1256 struct socket *so;
1257 struct sockopt *sopt;
1258{
1259 int error, optval;
1260 struct linger l;
1261 struct timeval tv;
1262 u_long val;
1263#ifdef MAC
1264 struct mac extmac;
1265#endif
1266
1267 error = 0;
1268 if (sopt->sopt_level != SOL_SOCKET) {
1269 if (so->so_proto && so->so_proto->pr_ctloutput)
1270 return ((*so->so_proto->pr_ctloutput)
1271 (so, sopt));
1272 error = ENOPROTOOPT;
1273 } else {
1274 switch (sopt->sopt_name) {
1275#ifdef INET
1276 case SO_ACCEPTFILTER:
1277 error = do_setopt_accept_filter(so, sopt);
1278 if (error)
1279 goto bad;
1280 break;
1281#endif
1282 case SO_LINGER:
1283 error = sooptcopyin(sopt, &l, sizeof l, sizeof l);
1284 if (error)
1285 goto bad;
1286
1287 so->so_linger = l.l_linger;
1288 if (l.l_onoff)
1289 so->so_options |= SO_LINGER;
1290 else
1291 so->so_options &= ~SO_LINGER;
1292 break;
1293
1294 case SO_DEBUG:
1295 case SO_KEEPALIVE:
1296 case SO_DONTROUTE:
1297 case SO_USELOOPBACK:
1298 case SO_BROADCAST:
1299 case SO_REUSEADDR:
1300 case SO_REUSEPORT:
1301 case SO_OOBINLINE:
1302 case SO_TIMESTAMP:
1303 case SO_NOSIGPIPE:
1304 error = sooptcopyin(sopt, &optval, sizeof optval,
1305 sizeof optval);
1306 if (error)
1307 goto bad;
1308 if (optval)
1309 so->so_options |= sopt->sopt_name;
1310 else
1311 so->so_options &= ~sopt->sopt_name;
1312 break;
1313
1314 case SO_SNDBUF:
1315 case SO_RCVBUF:
1316 case SO_SNDLOWAT:
1317 case SO_RCVLOWAT:
1318 error = sooptcopyin(sopt, &optval, sizeof optval,
1319 sizeof optval);
1320 if (error)
1321 goto bad;
1322
1323 /*
1324 * Values < 1 make no sense for any of these
1325 * options, so disallow them.
1326 */
1327 if (optval < 1) {
1328 error = EINVAL;
1329 goto bad;
1330 }
1331
1332 switch (sopt->sopt_name) {
1333 case SO_SNDBUF:
1334 case SO_RCVBUF:
1335 if (sbreserve(sopt->sopt_name == SO_SNDBUF ?
1336 &so->so_snd : &so->so_rcv, (u_long)optval,
1337 so, curthread) == 0) {
1338 error = ENOBUFS;
1339 goto bad;
1340 }
1341 break;
1342
1343 /*
1344 * Make sure the low-water is never greater than
1345 * the high-water.
1346 */
1347 case SO_SNDLOWAT:
1348 so->so_snd.sb_lowat =
1349 (optval > so->so_snd.sb_hiwat) ?
1350 so->so_snd.sb_hiwat : optval;
1351 break;
1352 case SO_RCVLOWAT:
1353 so->so_rcv.sb_lowat =
1354 (optval > so->so_rcv.sb_hiwat) ?
1355 so->so_rcv.sb_hiwat : optval;
1356 break;
1357 }
1358 break;
1359
1360 case SO_SNDTIMEO:
1361 case SO_RCVTIMEO:
1362 error = sooptcopyin(sopt, &tv, sizeof tv,
1363 sizeof tv);
1364 if (error)
1365 goto bad;
1366
1367 /* assert(hz > 0); */
1368 if (tv.tv_sec < 0 || tv.tv_sec > SHRT_MAX / hz ||
1369 tv.tv_usec < 0 || tv.tv_usec >= 1000000) {
1370 error = EDOM;
1371 goto bad;
1372 }
1373 /* assert(tick > 0); */
1374 /* assert(ULONG_MAX - SHRT_MAX >= 1000000); */
1375 val = (u_long)(tv.tv_sec * hz) + tv.tv_usec / tick;
1376 if (val > SHRT_MAX) {
1377 error = EDOM;
1378 goto bad;
1379 }
1380 if (val == 0 && tv.tv_usec != 0)
1381 val = 1;
1382
1383 switch (sopt->sopt_name) {
1384 case SO_SNDTIMEO:
1385 so->so_snd.sb_timeo = val;
1386 break;
1387 case SO_RCVTIMEO:
1388 so->so_rcv.sb_timeo = val;
1389 break;
1390 }
1391 break;
1392 case SO_LABEL:
1393#ifdef MAC
1394 error = sooptcopyin(sopt, &extmac, sizeof extmac,
1395 sizeof extmac);
1396 if (error)
1397 goto bad;
1398
1399 error = mac_setsockopt_label_set(
1400 sopt->sopt_td->td_ucred, so, &extmac);
1401
1402#else
1403 error = EOPNOTSUPP;
1404#endif
1405 break;
1406 default:
1407 error = ENOPROTOOPT;
1408 break;
1409 }
1410 if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
1411 (void) ((*so->so_proto->pr_ctloutput)
1412 (so, sopt));
1413 }
1414 }
1415bad:
1416 return (error);
1417}
1418
1419/* Helper routine for getsockopt */
1420int
1421sooptcopyout(sopt, buf, len)
1422 struct sockopt *sopt;
1423 void *buf;
1424 size_t len;
1425{
1426 int error;
1427 size_t valsize;
1428
1429 error = 0;
1430
1431 /*
1432 * Documented get behavior is that we always return a value,
1433 * possibly truncated to fit in the user's buffer.
1434 * Traditional behavior is that we always tell the user
1435 * precisely how much we copied, rather than something useful
1436 * like the total amount we had available for her.
1437 * Note that this interface is not idempotent; the entire answer must
1438 * generated ahead of time.
1439 */
1440 valsize = min(len, sopt->sopt_valsize);
1441 sopt->sopt_valsize = valsize;
1442 if (sopt->sopt_val != 0) {
1443 if (sopt->sopt_td != 0)
1444 error = copyout(buf, sopt->sopt_val, valsize);
1445 else
1446 bcopy(buf, sopt->sopt_val, valsize);
1447 }
1448 return error;
1449}
1450
1451int
1452sogetopt(so, sopt)
1453 struct socket *so;
1454 struct sockopt *sopt;
1455{
1456 int error, optval;
1457 struct linger l;
1458 struct timeval tv;
1459#ifdef INET
1460 struct accept_filter_arg *afap;
1461#endif
1462#ifdef MAC
1463 struct mac extmac;
1464#endif
1465
1466 error = 0;
1467 if (sopt->sopt_level != SOL_SOCKET) {
1468 if (so->so_proto && so->so_proto->pr_ctloutput) {
1469 return ((*so->so_proto->pr_ctloutput)
1470 (so, sopt));
1471 } else
1472 return (ENOPROTOOPT);
1473 } else {
1474 switch (sopt->sopt_name) {
1475#ifdef INET
1476 case SO_ACCEPTFILTER:
1477 if ((so->so_options & SO_ACCEPTCONN) == 0)
1478 return (EINVAL);
1479 MALLOC(afap, struct accept_filter_arg *, sizeof(*afap),
1480 M_TEMP, M_WAITOK | M_ZERO);
1481 if ((so->so_options & SO_ACCEPTFILTER) != 0) {
1482 strcpy(afap->af_name, so->so_accf->so_accept_filter->accf_name);
1483 if (so->so_accf->so_accept_filter_str != NULL)
1484 strcpy(afap->af_arg, so->so_accf->so_accept_filter_str);
1485 }
1486 error = sooptcopyout(sopt, afap, sizeof(*afap));
1487 FREE(afap, M_TEMP);
1488 break;
1489#endif
1490
1491 case SO_LINGER:
1492 l.l_onoff = so->so_options & SO_LINGER;
1493 l.l_linger = so->so_linger;
1494 error = sooptcopyout(sopt, &l, sizeof l);
1495 break;
1496
1497 case SO_USELOOPBACK:
1498 case SO_DONTROUTE:
1499 case SO_DEBUG:
1500 case SO_KEEPALIVE:
1501 case SO_REUSEADDR:
1502 case SO_REUSEPORT:
1503 case SO_BROADCAST:
1504 case SO_OOBINLINE:
1505 case SO_TIMESTAMP:
1506 case SO_NOSIGPIPE:
1507 optval = so->so_options & sopt->sopt_name;
1508integer:
1509 error = sooptcopyout(sopt, &optval, sizeof optval);
1510 break;
1511
1512 case SO_TYPE:
1513 optval = so->so_type;
1514 goto integer;
1515
1516 case SO_ERROR:
1517 optval = so->so_error;
1518 so->so_error = 0;
1519 goto integer;
1520
1521 case SO_SNDBUF:
1522 optval = so->so_snd.sb_hiwat;
1523 goto integer;
1524
1525 case SO_RCVBUF:
1526 optval = so->so_rcv.sb_hiwat;
1527 goto integer;
1528
1529 case SO_SNDLOWAT:
1530 optval = so->so_snd.sb_lowat;
1531 goto integer;
1532
1533 case SO_RCVLOWAT:
1534 optval = so->so_rcv.sb_lowat;
1535 goto integer;
1536
1537 case SO_SNDTIMEO:
1538 case SO_RCVTIMEO:
1539 optval = (sopt->sopt_name == SO_SNDTIMEO ?
1540 so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1541
1542 tv.tv_sec = optval / hz;
1543 tv.tv_usec = (optval % hz) * tick;
1544 error = sooptcopyout(sopt, &tv, sizeof tv);
1545 break;
1546 case SO_LABEL:
1547#ifdef MAC
1548 error = mac_getsockopt_label_get(
1549 sopt->sopt_td->td_ucred, so, &extmac);
1550 if (error)
1551 return (error);
1552 error = sooptcopyout(sopt, &extmac, sizeof extmac);
1553#else
1554 error = EOPNOTSUPP;
1555#endif
1556 break;
1557 case SO_PEERLABEL:
1558#ifdef MAC
1559 error = mac_getsockopt_peerlabel_get(
1560 sopt->sopt_td->td_ucred, so, &extmac);
1561 if (error)
1562 return (error);
1563 error = sooptcopyout(sopt, &extmac, sizeof extmac);
1564#else
1565 error = EOPNOTSUPP;
1566#endif
1567 break;
1568 default:
1569 error = ENOPROTOOPT;
1570 break;
1571 }
1572 return (error);
1573 }
1574}
1575
1576/* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */
1577int
1578soopt_getm(struct sockopt *sopt, struct mbuf **mp)
1579{
1580 struct mbuf *m, *m_prev;
1581 int sopt_size = sopt->sopt_valsize;
1582
1583 MGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT, MT_DATA);
1584 if (m == 0)
1585 return ENOBUFS;
1586 if (sopt_size > MLEN) {
1587 MCLGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT);
1588 if ((m->m_flags & M_EXT) == 0) {
1589 m_free(m);
1590 return ENOBUFS;
1591 }
1592 m->m_len = min(MCLBYTES, sopt_size);
1593 } else {
1594 m->m_len = min(MLEN, sopt_size);
1595 }
1596 sopt_size -= m->m_len;
1597 *mp = m;
1598 m_prev = m;
1599
1600 while (sopt_size) {
1601 MGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT, MT_DATA);
1602 if (m == 0) {
1603 m_freem(*mp);
1604 return ENOBUFS;
1605 }
1606 if (sopt_size > MLEN) {
1607 MCLGET(m, sopt->sopt_td ? M_TRYWAIT : M_DONTWAIT);
1608 if ((m->m_flags & M_EXT) == 0) {
1609 m_freem(*mp);
1610 return ENOBUFS;
1611 }
1612 m->m_len = min(MCLBYTES, sopt_size);
1613 } else {
1614 m->m_len = min(MLEN, sopt_size);
1615 }
1616 sopt_size -= m->m_len;
1617 m_prev->m_next = m;
1618 m_prev = m;
1619 }
1620 return 0;
1621}
1622
1623/* XXX; copyin sopt data into mbuf chain for (__FreeBSD__ < 3) routines. */
1624int
1625soopt_mcopyin(struct sockopt *sopt, struct mbuf *m)
1626{
1627 struct mbuf *m0 = m;
1628
1629 if (sopt->sopt_val == NULL)
1630 return 0;
1631 while (m != NULL && sopt->sopt_valsize >= m->m_len) {
1632 if (sopt->sopt_td != NULL) {
1633 int error;
1634
1635 error = copyin(sopt->sopt_val, mtod(m, char *),
1636 m->m_len);
1637 if (error != 0) {
1638 m_freem(m0);
1639 return(error);
1640 }
1641 } else
1642 bcopy(sopt->sopt_val, mtod(m, char *), m->m_len);
1643 sopt->sopt_valsize -= m->m_len;
1644 (caddr_t)sopt->sopt_val += m->m_len;
1645 m = m->m_next;
1646 }
1647 if (m != NULL) /* should be allocated enoughly at ip6_sooptmcopyin() */
1648 panic("ip6_sooptmcopyin");
1649 return 0;
1650}
1651
1652/* XXX; copyout mbuf chain data into soopt for (__FreeBSD__ < 3) routines. */
1653int
1654soopt_mcopyout(struct sockopt *sopt, struct mbuf *m)
1655{
1656 struct mbuf *m0 = m;
1657 size_t valsize = 0;
1658
1659 if (sopt->sopt_val == NULL)
1660 return 0;
1661 while (m != NULL && sopt->sopt_valsize >= m->m_len) {
1662 if (sopt->sopt_td != NULL) {
1663 int error;
1664
1665 error = copyout(mtod(m, char *), sopt->sopt_val,
1666 m->m_len);
1667 if (error != 0) {
1668 m_freem(m0);
1669 return(error);
1670 }
1671 } else
1672 bcopy(mtod(m, char *), sopt->sopt_val, m->m_len);
1673 sopt->sopt_valsize -= m->m_len;
1674 (caddr_t)sopt->sopt_val += m->m_len;
1675 valsize += m->m_len;
1676 m = m->m_next;
1677 }
1678 if (m != NULL) {
1679 /* enough soopt buffer should be given from user-land */
1680 m_freem(m0);
1681 return(EINVAL);
1682 }
1683 sopt->sopt_valsize = valsize;
1684 return 0;
1685}
1686
1687void
1688sohasoutofband(so)
|
1689 register struct socket *so;
| 1689 struct socket *so;
|
1690{
1691 if (so->so_sigio != NULL)
1692 pgsigio(&so->so_sigio, SIGURG, 0);
1693 selwakeup(&so->so_rcv.sb_sel);
1694}
1695
1696int
1697sopoll(struct socket *so, int events, struct ucred *active_cred,
1698 struct thread *td)
1699{
1700 int revents = 0;
1701 int s = splnet();
1702
1703 if (events & (POLLIN | POLLRDNORM))
1704 if (soreadable(so))
1705 revents |= events & (POLLIN | POLLRDNORM);
1706
1707 if (events & POLLINIGNEOF)
1708 if (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
1709 !TAILQ_EMPTY(&so->so_comp) || so->so_error)
1710 revents |= POLLINIGNEOF;
1711
1712 if (events & (POLLOUT | POLLWRNORM))
1713 if (sowriteable(so))
1714 revents |= events & (POLLOUT | POLLWRNORM);
1715
1716 if (events & (POLLPRI | POLLRDBAND))
1717 if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
1718 revents |= events & (POLLPRI | POLLRDBAND);
1719
1720 if (revents == 0) {
1721 if (events &
1722 (POLLIN | POLLINIGNEOF | POLLPRI | POLLRDNORM |
1723 POLLRDBAND)) {
1724 selrecord(td, &so->so_rcv.sb_sel);
1725 so->so_rcv.sb_flags |= SB_SEL;
1726 }
1727
1728 if (events & (POLLOUT | POLLWRNORM)) {
1729 selrecord(td, &so->so_snd.sb_sel);
1730 so->so_snd.sb_flags |= SB_SEL;
1731 }
1732 }
1733
1734 splx(s);
1735 return (revents);
1736}
1737
1738int
1739soo_kqfilter(struct file *fp, struct knote *kn)
1740{
1741 struct socket *so = kn->kn_fp->f_data;
1742 struct sockbuf *sb;
1743 int s;
1744
1745 switch (kn->kn_filter) {
1746 case EVFILT_READ:
1747 if (so->so_options & SO_ACCEPTCONN)
1748 kn->kn_fop = &solisten_filtops;
1749 else
1750 kn->kn_fop = &soread_filtops;
1751 sb = &so->so_rcv;
1752 break;
1753 case EVFILT_WRITE:
1754 kn->kn_fop = &sowrite_filtops;
1755 sb = &so->so_snd;
1756 break;
1757 default:
1758 return (1);
1759 }
1760
1761 s = splnet();
1762 SLIST_INSERT_HEAD(&sb->sb_sel.si_note, kn, kn_selnext);
1763 sb->sb_flags |= SB_KNOTE;
1764 splx(s);
1765 return (0);
1766}
1767
1768static void
1769filt_sordetach(struct knote *kn)
1770{
1771 struct socket *so = kn->kn_fp->f_data;
1772 int s = splnet();
1773
1774 SLIST_REMOVE(&so->so_rcv.sb_sel.si_note, kn, knote, kn_selnext);
1775 if (SLIST_EMPTY(&so->so_rcv.sb_sel.si_note))
1776 so->so_rcv.sb_flags &= ~SB_KNOTE;
1777 splx(s);
1778}
1779
1780/*ARGSUSED*/
1781static int
1782filt_soread(struct knote *kn, long hint)
1783{
1784 struct socket *so = kn->kn_fp->f_data;
1785
1786 kn->kn_data = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
1787 if (so->so_state & SS_CANTRCVMORE) {
1788 kn->kn_flags |= EV_EOF;
1789 kn->kn_fflags = so->so_error;
1790 return (1);
1791 }
1792 if (so->so_error) /* temporary udp error */
1793 return (1);
1794 if (kn->kn_sfflags & NOTE_LOWAT)
1795 return (kn->kn_data >= kn->kn_sdata);
1796 return (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat);
1797}
1798
1799static void
1800filt_sowdetach(struct knote *kn)
1801{
1802 struct socket *so = kn->kn_fp->f_data;
1803 int s = splnet();
1804
1805 SLIST_REMOVE(&so->so_snd.sb_sel.si_note, kn, knote, kn_selnext);
1806 if (SLIST_EMPTY(&so->so_snd.sb_sel.si_note))
1807 so->so_snd.sb_flags &= ~SB_KNOTE;
1808 splx(s);
1809}
1810
1811/*ARGSUSED*/
1812static int
1813filt_sowrite(struct knote *kn, long hint)
1814{
1815 struct socket *so = kn->kn_fp->f_data;
1816
1817 kn->kn_data = sbspace(&so->so_snd);
1818 if (so->so_state & SS_CANTSENDMORE) {
1819 kn->kn_flags |= EV_EOF;
1820 kn->kn_fflags = so->so_error;
1821 return (1);
1822 }
1823 if (so->so_error) /* temporary udp error */
1824 return (1);
1825 if (((so->so_state & SS_ISCONNECTED) == 0) &&
1826 (so->so_proto->pr_flags & PR_CONNREQUIRED))
1827 return (0);
1828 if (kn->kn_sfflags & NOTE_LOWAT)
1829 return (kn->kn_data >= kn->kn_sdata);
1830 return (kn->kn_data >= so->so_snd.sb_lowat);
1831}
1832
1833/*ARGSUSED*/
1834static int
1835filt_solisten(struct knote *kn, long hint)
1836{
1837 struct socket *so = kn->kn_fp->f_data;
1838
1839 kn->kn_data = so->so_qlen;
1840 return (! TAILQ_EMPTY(&so->so_comp));
1841}
1842
1843int
1844socheckuid(struct socket *so, uid_t uid)
1845{
1846
1847 if (so == NULL)
1848 return (EPERM);
1849 if (so->so_cred->cr_uid == uid)
1850 return (0);
1851 return (EPERM);
1852}
| 1690{
1691 if (so->so_sigio != NULL)
1692 pgsigio(&so->so_sigio, SIGURG, 0);
1693 selwakeup(&so->so_rcv.sb_sel);
1694}
1695
1696int
1697sopoll(struct socket *so, int events, struct ucred *active_cred,
1698 struct thread *td)
1699{
1700 int revents = 0;
1701 int s = splnet();
1702
1703 if (events & (POLLIN | POLLRDNORM))
1704 if (soreadable(so))
1705 revents |= events & (POLLIN | POLLRDNORM);
1706
1707 if (events & POLLINIGNEOF)
1708 if (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
1709 !TAILQ_EMPTY(&so->so_comp) || so->so_error)
1710 revents |= POLLINIGNEOF;
1711
1712 if (events & (POLLOUT | POLLWRNORM))
1713 if (sowriteable(so))
1714 revents |= events & (POLLOUT | POLLWRNORM);
1715
1716 if (events & (POLLPRI | POLLRDBAND))
1717 if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
1718 revents |= events & (POLLPRI | POLLRDBAND);
1719
1720 if (revents == 0) {
1721 if (events &
1722 (POLLIN | POLLINIGNEOF | POLLPRI | POLLRDNORM |
1723 POLLRDBAND)) {
1724 selrecord(td, &so->so_rcv.sb_sel);
1725 so->so_rcv.sb_flags |= SB_SEL;
1726 }
1727
1728 if (events & (POLLOUT | POLLWRNORM)) {
1729 selrecord(td, &so->so_snd.sb_sel);
1730 so->so_snd.sb_flags |= SB_SEL;
1731 }
1732 }
1733
1734 splx(s);
1735 return (revents);
1736}
1737
1738int
1739soo_kqfilter(struct file *fp, struct knote *kn)
1740{
1741 struct socket *so = kn->kn_fp->f_data;
1742 struct sockbuf *sb;
1743 int s;
1744
1745 switch (kn->kn_filter) {
1746 case EVFILT_READ:
1747 if (so->so_options & SO_ACCEPTCONN)
1748 kn->kn_fop = &solisten_filtops;
1749 else
1750 kn->kn_fop = &soread_filtops;
1751 sb = &so->so_rcv;
1752 break;
1753 case EVFILT_WRITE:
1754 kn->kn_fop = &sowrite_filtops;
1755 sb = &so->so_snd;
1756 break;
1757 default:
1758 return (1);
1759 }
1760
1761 s = splnet();
1762 SLIST_INSERT_HEAD(&sb->sb_sel.si_note, kn, kn_selnext);
1763 sb->sb_flags |= SB_KNOTE;
1764 splx(s);
1765 return (0);
1766}
1767
1768static void
1769filt_sordetach(struct knote *kn)
1770{
1771 struct socket *so = kn->kn_fp->f_data;
1772 int s = splnet();
1773
1774 SLIST_REMOVE(&so->so_rcv.sb_sel.si_note, kn, knote, kn_selnext);
1775 if (SLIST_EMPTY(&so->so_rcv.sb_sel.si_note))
1776 so->so_rcv.sb_flags &= ~SB_KNOTE;
1777 splx(s);
1778}
1779
1780/*ARGSUSED*/
1781static int
1782filt_soread(struct knote *kn, long hint)
1783{
1784 struct socket *so = kn->kn_fp->f_data;
1785
1786 kn->kn_data = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
1787 if (so->so_state & SS_CANTRCVMORE) {
1788 kn->kn_flags |= EV_EOF;
1789 kn->kn_fflags = so->so_error;
1790 return (1);
1791 }
1792 if (so->so_error) /* temporary udp error */
1793 return (1);
1794 if (kn->kn_sfflags & NOTE_LOWAT)
1795 return (kn->kn_data >= kn->kn_sdata);
1796 return (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat);
1797}
1798
1799static void
1800filt_sowdetach(struct knote *kn)
1801{
1802 struct socket *so = kn->kn_fp->f_data;
1803 int s = splnet();
1804
1805 SLIST_REMOVE(&so->so_snd.sb_sel.si_note, kn, knote, kn_selnext);
1806 if (SLIST_EMPTY(&so->so_snd.sb_sel.si_note))
1807 so->so_snd.sb_flags &= ~SB_KNOTE;
1808 splx(s);
1809}
1810
1811/*ARGSUSED*/
1812static int
1813filt_sowrite(struct knote *kn, long hint)
1814{
1815 struct socket *so = kn->kn_fp->f_data;
1816
1817 kn->kn_data = sbspace(&so->so_snd);
1818 if (so->so_state & SS_CANTSENDMORE) {
1819 kn->kn_flags |= EV_EOF;
1820 kn->kn_fflags = so->so_error;
1821 return (1);
1822 }
1823 if (so->so_error) /* temporary udp error */
1824 return (1);
1825 if (((so->so_state & SS_ISCONNECTED) == 0) &&
1826 (so->so_proto->pr_flags & PR_CONNREQUIRED))
1827 return (0);
1828 if (kn->kn_sfflags & NOTE_LOWAT)
1829 return (kn->kn_data >= kn->kn_sdata);
1830 return (kn->kn_data >= so->so_snd.sb_lowat);
1831}
1832
1833/*ARGSUSED*/
1834static int
1835filt_solisten(struct knote *kn, long hint)
1836{
1837 struct socket *so = kn->kn_fp->f_data;
1838
1839 kn->kn_data = so->so_qlen;
1840 return (! TAILQ_EMPTY(&so->so_comp));
1841}
1842
1843int
1844socheckuid(struct socket *so, uid_t uid)
1845{
1846
1847 if (so == NULL)
1848 return (EPERM);
1849 if (so->so_cred->cr_uid == uid)
1850 return (0);
1851 return (EPERM);
1852}
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