1 /*
2 * Copyright (c) 2000-2021 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /*
29 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
30 * All rights reserved.
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 * 1. Redistributions of source code must retain the above copyright
36 * notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 * notice, this list of conditions and the following disclaimer in the
39 * documentation and/or other materials provided with the distribution.
40 * 3. Neither the name of the project nor the names of its contributors
41 * may be used to endorse or promote products derived from this software
42 * without specific prior written permission.
43 *
44 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
47 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
54 * SUCH DAMAGE.
55 *
56 * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.4 2001/07/29 19:32:40 ume Exp $
57 */
58
59 /*
60 * Copyright (c) 1982, 1986, 1988, 1993
61 * The Regents of the University of California. All rights reserved.
62 *
63 * Redistribution and use in source and binary forms, with or without
64 * modification, are permitted provided that the following conditions
65 * are met:
66 * 1. Redistributions of source code must retain the above copyright
67 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in the
70 * documentation and/or other materials provided with the distribution.
71 * 3. All advertising materials mentioning features or use of this software
72 * must display the following acknowledgement:
73 * This product includes software developed by the University of
74 * California, Berkeley and its contributors.
75 * 4. Neither the name of the University nor the names of its contributors
76 * may be used to endorse or promote products derived from this software
77 * without specific prior written permission.
78 *
79 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
80 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
81 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
82 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
83 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
84 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
85 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
86 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
87 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
88 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
89 * SUCH DAMAGE.
90 *
91 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
92 */
93 #include <sys/param.h>
94 #include <sys/malloc.h>
95 #include <sys/proc.h>
96 #include <sys/mcache.h>
97 #include <sys/mbuf.h>
98 #include <sys/socket.h>
99 #include <sys/protosw.h>
100 #include <sys/socketvar.h>
101 #include <sys/errno.h>
102 #include <sys/systm.h>
103
104 #include <net/if.h>
105 #include <net/net_api_stats.h>
106 #include <net/route.h>
107 #include <net/if_types.h>
108 #include <net/content_filter.h>
109
110 #include <netinet/in.h>
111 #include <netinet/in_var.h>
112 #include <netinet/in_systm.h>
113 #include <netinet/in_tclass.h>
114 #include <netinet/ip6.h>
115 #include <netinet6/ip6_var.h>
116 #include <netinet/icmp6.h>
117 #include <netinet/in_pcb.h>
118 #include <netinet6/in6_pcb.h>
119 #include <netinet6/nd6.h>
120 #include <netinet6/ip6protosw.h>
121 #include <netinet6/scope6_var.h>
122 #include <netinet6/raw_ip6.h>
123
124 #if IPSEC
125 #include <netinet6/ipsec.h>
126 #include <netinet6/ipsec6.h>
127 #endif /*IPSEC*/
128
129 #if NECP
130 #include <net/necp.h>
131 #endif
132
133 /*
134 * Raw interface to IP6 protocol.
135 */
136
137 extern struct inpcbhead ripcb;
138 extern struct inpcbinfo ripcbinfo;
139 extern u_int32_t rip_sendspace;
140 extern u_int32_t rip_recvspace;
141
142 struct rip6stat rip6stat;
143
144 /*
145 * Setup generic address and protocol structures
146 * for raw_input routine, then pass them along with
147 * mbuf chain.
148 */
149 int
rip6_input(struct mbuf ** mp,int * offp,int proto)150 rip6_input(
151 struct mbuf **mp,
152 int *offp,
153 int proto)
154 {
155 struct mbuf *m = *mp;
156 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
157 struct inpcb *in6p;
158 struct inpcb *last = 0;
159 struct mbuf *opts = NULL;
160 struct sockaddr_in6 rip6src;
161 int ret;
162 struct ifnet *ifp = m->m_pkthdr.rcvif;
163 boolean_t is_wake_pkt = false;
164
165 /* Expect 32-bit aligned data pointer on strict-align platforms */
166 MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
167
168 rip6stat.rip6s_ipackets++;
169
170 init_sin6(&rip6src, m); /* general init */
171
172 if ((m->m_flags & M_PKTHDR) && (m->m_pkthdr.pkt_flags & PKTF_WAKE_PKT)) {
173 is_wake_pkt = true;
174 }
175
176 lck_rw_lock_shared(&ripcbinfo.ipi_lock);
177 LIST_FOREACH(in6p, &ripcb, inp_list) {
178 if ((in6p->in6p_vflag & INP_IPV6) == 0) {
179 continue;
180 }
181 if (in6p->in6p_ip6_nxt &&
182 in6p->in6p_ip6_nxt != proto) {
183 continue;
184 }
185 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
186 !in6_are_addr_equal_scoped(&in6p->in6p_laddr, &ip6->ip6_dst, in6p->inp_lifscope, ifp->if_index)) {
187 continue;
188 }
189 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
190 !in6_are_addr_equal_scoped(&in6p->in6p_faddr, &ip6->ip6_src, in6p->inp_fifscope, ifp->if_index)) {
191 continue;
192 }
193
194 if (inp_restricted_recv(in6p, ifp)) {
195 continue;
196 }
197
198 if (proto == IPPROTO_ICMPV6 || in6p->in6p_cksum != -1) {
199 rip6stat.rip6s_isum++;
200 if (in6_cksum(m, ip6->ip6_nxt, *offp,
201 m->m_pkthdr.len - *offp)) {
202 rip6stat.rip6s_badsum++;
203 continue;
204 }
205 }
206 if (last) {
207 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
208
209 #if NECP
210 if (n && !necp_socket_is_allowed_to_send_recv_v6(in6p, 0, 0,
211 &ip6->ip6_dst, &ip6->ip6_src, ifp, 0, NULL, NULL, NULL, NULL)) {
212 m_freem(n);
213 /* do not inject data into pcb */
214 } else
215 #endif /* NECP */
216 if (n) {
217 if ((last->in6p_flags & INP_CONTROLOPTS) != 0 ||
218 SOFLOW_ENABLED(last->in6p_socket) ||
219 SO_RECV_CONTROL_OPTS(last->in6p_socket)) {
220 ret = ip6_savecontrol(last, n, &opts);
221 if (ret != 0) {
222 m_freem(n);
223 m_freem(opts);
224 opts = NULL;
225 last = in6p;
226 continue;
227 }
228 }
229 /* strip intermediate headers */
230 m_adj(n, *offp);
231 so_recv_data_stat(last->in6p_socket, m, 0);
232 if (sbappendaddr(&last->in6p_socket->so_rcv,
233 (struct sockaddr *)&rip6src,
234 n, opts, NULL) == 0) {
235 rip6stat.rip6s_fullsock++;
236 } else {
237 sorwakeup(last->in6p_socket);
238 }
239 if (is_wake_pkt) {
240 soevent(in6p->in6p_socket,
241 SO_FILT_HINT_LOCKED | SO_FILT_HINT_WAKE_PKT);
242 }
243 opts = NULL;
244 }
245 }
246 last = in6p;
247 }
248
249 #if NECP
250 if (last && !necp_socket_is_allowed_to_send_recv_v6(in6p, 0, 0,
251 &ip6->ip6_dst, &ip6->ip6_src, ifp, 0, NULL, NULL, NULL, NULL)) {
252 m_freem(m);
253 ip6stat.ip6s_delivered--;
254 /* do not inject data into pcb */
255 } else
256 #endif /* NECP */
257 if (last) {
258 if ((last->in6p_flags & INP_CONTROLOPTS) != 0 ||
259 SOFLOW_ENABLED(last->in6p_socket) ||
260 SO_RECV_CONTROL_OPTS(last->in6p_socket)) {
261 ret = ip6_savecontrol(last, m, &opts);
262 if (ret != 0) {
263 m_freem(m);
264 m_freem(opts);
265 ip6stat.ip6s_delivered--;
266 goto unlock;
267 }
268 }
269 /* strip intermediate headers */
270 m_adj(m, *offp);
271 so_recv_data_stat(last->in6p_socket, m, 0);
272 if (sbappendaddr(&last->in6p_socket->so_rcv,
273 (struct sockaddr *)&rip6src, m, opts, NULL) == 0) {
274 rip6stat.rip6s_fullsock++;
275 } else {
276 sorwakeup(last->in6p_socket);
277 }
278 if (is_wake_pkt) {
279 soevent(last->in6p_socket,
280 SO_FILT_HINT_LOCKED | SO_FILT_HINT_WAKE_PKT);
281 }
282 } else {
283 rip6stat.rip6s_nosock++;
284 if (m->m_flags & M_MCAST) {
285 rip6stat.rip6s_nosockmcast++;
286 }
287 if (proto == IPPROTO_NONE) {
288 m_freem(m);
289 } else {
290 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
291 icmp6_error(m, ICMP6_PARAM_PROB,
292 ICMP6_PARAMPROB_NEXTHEADER,
293 (int)(prvnxtp - mtod(m, char *)));
294 }
295 ip6stat.ip6s_delivered--;
296 }
297
298 unlock:
299 lck_rw_done(&ripcbinfo.ipi_lock);
300
301 return IPPROTO_DONE;
302 }
303
304 void
rip6_ctlinput(int cmd,struct sockaddr * sa,void * d,__unused struct ifnet * ifp)305 rip6_ctlinput(
306 int cmd,
307 struct sockaddr *sa,
308 void *d,
309 __unused struct ifnet *ifp)
310 {
311 struct ip6_hdr *ip6 = NULL;
312 struct mbuf *m = NULL;
313 void *cmdarg = NULL;
314 int off = 0;
315 struct ip6ctlparam *ip6cp = NULL;
316 const struct sockaddr_in6 *sa6_src = NULL;
317 void (*notify)(struct inpcb *, int) = in6_rtchange;
318
319 if (sa->sa_family != AF_INET6 ||
320 sa->sa_len != sizeof(struct sockaddr_in6)) {
321 return;
322 }
323
324 if ((unsigned)cmd >= PRC_NCMDS) {
325 return;
326 }
327 if (PRC_IS_REDIRECT(cmd)) {
328 notify = in6_rtchange;
329 d = NULL;
330 } else if (cmd == PRC_HOSTDEAD) {
331 d = NULL;
332 } else if (inet6ctlerrmap[cmd] == 0) {
333 return;
334 }
335
336 /* if the parameter is from icmp6, decode it. */
337 if (d != NULL) {
338 ip6cp = (struct ip6ctlparam *)d;
339 m = ip6cp->ip6c_m;
340 ip6 = ip6cp->ip6c_ip6;
341 off = ip6cp->ip6c_off;
342 cmdarg = ip6cp->ip6c_cmdarg;
343 sa6_src = ip6cp->ip6c_src;
344 } else {
345 m = NULL;
346 ip6 = NULL;
347 cmdarg = NULL;
348 sa6_src = &sa6_any;
349 }
350
351 (void) in6_pcbnotify(&ripcbinfo, sa, 0, (const struct sockaddr *)sa6_src,
352 0, cmd, cmdarg, notify);
353 }
354
355 /*
356 * Generate IPv6 header and pass packet to ip6_output.
357 * Tack on options user may have setup with control call.
358 */
359 int
rip6_output(struct mbuf * m,struct socket * so,struct sockaddr_in6 * dstsock,struct mbuf * control,int israw)360 rip6_output(
361 struct mbuf *m,
362 struct socket *so,
363 struct sockaddr_in6 *dstsock,
364 struct mbuf *control,
365 int israw)
366 {
367 struct in6_addr *dst;
368 struct ip6_hdr *ip6;
369 struct inpcb *in6p;
370 u_int plen = m->m_pkthdr.len;
371 int error = 0;
372 struct ip6_pktopts opt, *optp = NULL;
373 struct ip6_moptions *im6o = NULL;
374 struct ifnet *oifp = NULL;
375 int type = 0, code = 0; /* for ICMPv6 output statistics only */
376 int sotc = SO_TC_UNSPEC;
377 int netsvctype = _NET_SERVICE_TYPE_UNSPEC;
378 struct ip6_out_args ip6oa;
379 int flags = IPV6_OUTARGS;
380 struct sockaddr_in6 tmp;
381 #if CONTENT_FILTER
382 struct m_tag *cfil_tag = NULL;
383 bool cfil_faddr_use = false;
384 uint32_t cfil_so_state_change_cnt = 0;
385 uint32_t cfil_so_options = 0;
386 uint32_t sifscope = IFSCOPE_NONE, difscope = IFSCOPE_NONE;
387 struct sockaddr *cfil_faddr = NULL;
388 struct sockaddr_in6 *cfil_sin6 = NULL;
389 #endif
390
391 in6p = sotoin6pcb(so);
392 if (in6p == NULL) {
393 error = EINVAL;
394 goto bad;
395 }
396
397 #if CONTENT_FILTER
398 /*
399 * If socket is subject to Content Filter and no addr is passed in,
400 * retrieve CFIL saved state from mbuf and use it if necessary.
401 */
402 if (CFIL_DGRAM_FILTERED(so) && !dstsock) {
403 cfil_tag = cfil_dgram_get_socket_state(m, &cfil_so_state_change_cnt, &cfil_so_options, &cfil_faddr, NULL);
404 if (cfil_tag) {
405 cfil_sin6 = SIN6(cfil_faddr);
406 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
407 /*
408 * Socket is unconnected, simply use the saved faddr as 'addr' to go through
409 * the connect/disconnect logic.
410 */
411 dstsock = cfil_sin6;
412 } else if ((so->so_state_change_cnt != cfil_so_state_change_cnt) &&
413 (in6p->in6p_fport != cfil_sin6->sin6_port ||
414 !in6_are_addr_equal_scoped(&in6p->in6p_faddr, &cfil_sin6->sin6_addr, in6p->inp_fifscope, cfil_sin6->sin6_scope_id))) {
415 /*
416 * Socket is connected but socket state and dest addr/port changed.
417 * We need to use the saved faddr and socket options.
418 */
419 cfil_faddr_use = true;
420 }
421 }
422 }
423 #endif
424
425 /* always copy sockaddr to avoid overwrites */
426 if (so->so_state & SS_ISCONNECTED) {
427 if (dstsock != NULL) {
428 error = EISCONN;
429 goto bad;
430 }
431 /* XXX */
432 bzero(&tmp, sizeof(tmp));
433 tmp.sin6_family = AF_INET6;
434 tmp.sin6_len = sizeof(struct sockaddr_in6);
435 bcopy(
436 #if CONTENT_FILTER
437 cfil_faddr_use ? &cfil_sin6->sin6_addr :
438 #endif
439 &in6p->in6p_faddr, &tmp.sin6_addr, sizeof(struct in6_addr));
440 dstsock = &tmp;
441 } else {
442 if (dstsock == NULL) {
443 error = ENOTCONN;
444 goto bad;
445 }
446 tmp = *dstsock;
447 dstsock = &tmp;
448 }
449
450 #if ENABLE_DEFAULT_SCOPE
451 if (dstsock->sin6_scope_id == 0) { /* not change if specified */
452 dstsock->sin6_scope_id = scope6_addr2default(&dstsock->sin6_addr);
453 }
454 #endif
455
456 bzero(&ip6oa, sizeof(ip6oa));
457 ip6oa.ip6oa_boundif = IFSCOPE_NONE;
458 ip6oa.ip6oa_flags = IP6OAF_SELECT_SRCIF;
459
460 if (in6p == NULL
461 #if NECP
462 || (necp_socket_should_use_flow_divert(in6p))
463 #endif /* NECP */
464 ) {
465 if (in6p == NULL) {
466 error = EINVAL;
467 } else {
468 error = EPROTOTYPE;
469 }
470 goto bad;
471 }
472 if (dstsock != NULL && IN6_IS_ADDR_V4MAPPED(&dstsock->sin6_addr)) {
473 error = EINVAL;
474 goto bad;
475 }
476
477 if (in6p->inp_flags & INP_BOUND_IF) {
478 ip6oa.ip6oa_boundif = in6p->inp_boundifp->if_index;
479 ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
480 } else if (!in6_embedded_scope && IN6_IS_SCOPE_EMBED(&in6p->in6p_faddr)) {
481 ip6oa.ip6oa_boundif = dstsock->sin6_scope_id;
482 ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
483 }
484 if (INP_NO_CELLULAR(in6p)) {
485 ip6oa.ip6oa_flags |= IP6OAF_NO_CELLULAR;
486 }
487 if (INP_NO_EXPENSIVE(in6p)) {
488 ip6oa.ip6oa_flags |= IP6OAF_NO_EXPENSIVE;
489 }
490 if (INP_NO_CONSTRAINED(in6p)) {
491 ip6oa.ip6oa_flags |= IP6OAF_NO_CONSTRAINED;
492 }
493 if (INP_AWDL_UNRESTRICTED(in6p)) {
494 ip6oa.ip6oa_flags |= IP6OAF_AWDL_UNRESTRICTED;
495 }
496 if (INP_INTCOPROC_ALLOWED(in6p)) {
497 ip6oa.ip6oa_flags |= IP6OAF_INTCOPROC_ALLOWED;
498 }
499 if (INP_MANAGEMENT_ALLOWED(in6p)) {
500 ip6oa.ip6oa_flags |= IP6OAF_MANAGEMENT_ALLOWED;
501 }
502
503 dst = &dstsock->sin6_addr;
504 if (control) {
505 sotc = so_tc_from_control(control, &netsvctype);
506
507 if ((error = ip6_setpktopts(control, &opt, NULL,
508 SOCK_PROTO(so))) != 0) {
509 goto bad;
510 }
511 optp = &opt;
512 } else {
513 optp = in6p->in6p_outputopts;
514 }
515 if (sotc == SO_TC_UNSPEC) {
516 sotc = so->so_traffic_class;
517 netsvctype = so->so_netsvctype;
518 }
519 ip6oa.ip6oa_sotc = sotc;
520 ip6oa.ip6oa_netsvctype = netsvctype;
521
522 /*
523 * For an ICMPv6 packet, we should know its type and code
524 * to update statistics.
525 */
526 if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
527 struct icmp6_hdr *icmp6;
528 if (m->m_len < sizeof(struct icmp6_hdr) &&
529 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
530 error = ENOBUFS;
531 goto bad;
532 }
533 icmp6 = mtod(m, struct icmp6_hdr *);
534 type = icmp6->icmp6_type;
535 code = icmp6->icmp6_code;
536 }
537
538 if (in6p->inp_flowhash == 0) {
539 inp_calc_flowhash(in6p);
540 ASSERT(in6p->inp_flowhash != 0);
541 }
542 /* update flowinfo - RFC 6437 */
543 if (in6p->inp_flow == 0 && in6p->in6p_flags & IN6P_AUTOFLOWLABEL) {
544 in6p->inp_flow &= ~IPV6_FLOWLABEL_MASK;
545 in6p->inp_flow |=
546 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
547 }
548
549 M_PREPEND(m, sizeof(*ip6), M_WAIT, 1);
550 if (m == NULL) {
551 error = ENOBUFS;
552 goto bad;
553 }
554 ip6 = mtod(m, struct ip6_hdr *);
555
556 /*
557 * Next header might not be ICMP6 but use its pseudo header anyway.
558 */
559 ip6->ip6_dst = *dst;
560
561 im6o = in6p->in6p_moptions;
562
563 /*
564 * If the scope of the destination is link-local, embed the interface
565 * index in the address.
566 *
567 * XXX advanced-api value overrides sin6_scope_id
568 */
569 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
570 struct in6_pktinfo *pi;
571 struct ifnet *im6o_multicast_ifp = NULL;
572
573 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && im6o != NULL) {
574 IM6O_LOCK(im6o);
575 im6o_multicast_ifp = im6o->im6o_multicast_ifp;
576 IM6O_UNLOCK(im6o);
577 }
578 /*
579 * XXX Boundary check is assumed to be already done in
580 * ip6_setpktoptions().
581 */
582 ifnet_head_lock_shared();
583 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
584 if (in6_embedded_scope) {
585 ip6->ip6_dst.s6_addr16[1] = htons((uint16_t)pi->ipi6_ifindex);
586 }
587 oifp = ifindex2ifnet[pi->ipi6_ifindex];
588 difscope = pi->ipi6_ifindex;
589 if (oifp != NULL) {
590 ifnet_reference(oifp);
591 }
592 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
593 im6o != NULL && im6o_multicast_ifp != NULL) {
594 oifp = im6o_multicast_ifp;
595 ifnet_reference(oifp);
596 if (in6_embedded_scope) {
597 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
598 }
599 difscope = oifp->if_index;
600 } else if (dstsock->sin6_scope_id) {
601 /*
602 * boundary check
603 *
604 * Sinced stsock->sin6_scope_id is unsigned, we don't
605 * need to check if it's < 0
606 */
607 if (if_index < dstsock->sin6_scope_id) {
608 error = ENXIO; /* XXX EINVAL? */
609 ifnet_head_done();
610 goto bad;
611 }
612 if (in6_embedded_scope) {
613 ip6->ip6_dst.s6_addr16[1]
614 = htons(dstsock->sin6_scope_id & 0xffff); /*XXX*/
615 }
616 difscope = dstsock->sin6_scope_id;
617 }
618 ifnet_head_done();
619
620 ip6_output_setdstifscope(m, difscope, NULL);
621 }
622
623 /*
624 * Source address selection.
625 */
626 {
627 struct in6_addr *in6a;
628 struct in6_addr storage;
629 u_short index = 0;
630
631 if (israw != 0 && optp && optp->ip6po_pktinfo && !IN6_IS_ADDR_UNSPECIFIED(&optp->ip6po_pktinfo->ipi6_addr)) {
632 in6a = &optp->ip6po_pktinfo->ipi6_addr;
633 flags |= IPV6_FLAG_NOSRCIFSEL;
634 sifscope = optp->ip6po_pktinfo->ipi6_ifindex;
635 } else {
636 struct ifnet *src_ifp = NULL;
637 in6a = in6_selectsrc(dstsock, optp, in6p,
638 &in6p->in6p_route, &src_ifp, &storage, ip6oa.ip6oa_boundif,
639 &error);
640 if (src_ifp != NULL) {
641 in6p->inp_lifscope = src_ifp->if_index;
642 ifnet_release(src_ifp);
643 } else {
644 in6p->inp_lifscope = ip6oa.ip6oa_boundif;
645 }
646 if (in6a != 0) {
647 ip6oa.ip6oa_flags |= IP6OAF_BOUND_SRCADDR;
648 } else {
649 if (error == 0) {
650 error = EADDRNOTAVAIL;
651 }
652 goto bad;
653 }
654 }
655
656 ip6->ip6_src = *in6a;
657 if (IN6_IS_SCOPE_EMBED(in6a) && sifscope == IFSCOPE_NONE) {
658 sifscope = difscope;
659 }
660 ip6_output_setsrcifscope(m, sifscope, NULL);
661
662 if (in6p->in6p_route.ro_rt != NULL) {
663 RT_LOCK(in6p->in6p_route.ro_rt);
664 if (in6p->in6p_route.ro_rt->rt_ifp != NULL) {
665 index = in6p->in6p_route.ro_rt->rt_ifp->if_index;
666 }
667 RT_UNLOCK(in6p->in6p_route.ro_rt);
668 if (oifp != NULL) {
669 ifnet_release(oifp);
670 }
671 ifnet_head_lock_shared();
672 if (index == 0 || if_index < index) {
673 panic("bad if_index on interface from route");
674 }
675 oifp = ifindex2ifnet[index];
676 if (oifp != NULL) {
677 ifnet_reference(oifp);
678 }
679 ifnet_head_done();
680 }
681 }
682 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
683 (in6p->inp_flow & IPV6_FLOWINFO_MASK);
684 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
685 (IPV6_VERSION & IPV6_VERSION_MASK);
686 /* ip6_plen will be filled in ip6_output, so not fill it here. */
687 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
688 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
689
690 if (SOCK_PROTO(so) == IPPROTO_ICMPV6 || in6p->in6p_cksum != -1) {
691 struct mbuf *n;
692 int off;
693 u_int16_t *p;
694
695 /* compute checksum */
696 if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
697 off = offsetof(struct icmp6_hdr, icmp6_cksum);
698 } else {
699 off = in6p->in6p_cksum;
700 }
701 if (plen < (unsigned int)(off + 1)) {
702 error = EINVAL;
703 goto bad;
704 }
705 off += sizeof(struct ip6_hdr);
706
707 n = m;
708 while (n && n->m_len <= off) {
709 off -= n->m_len;
710 n = n->m_next;
711 }
712 if (!n) {
713 goto bad;
714 }
715 p = (u_int16_t *)(void *)(mtod(n, caddr_t) + off);
716 *p = 0;
717 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
718 }
719
720 #if NECP
721 {
722 necp_kernel_policy_id policy_id;
723 necp_kernel_policy_id skip_policy_id;
724 u_int32_t route_rule_id;
725 u_int32_t pass_flags;
726
727 /*
728 * We need a route to perform NECP route rule checks
729 */
730 if ((net_qos_policy_restricted != 0 &&
731 ROUTE_UNUSABLE(&in6p->in6p_route))
732 #if CONTENT_FILTER
733 || cfil_faddr_use
734 #endif
735 ) {
736 struct sockaddr_in6 to;
737 struct sockaddr_in6 from;
738
739 ROUTE_RELEASE(&in6p->in6p_route);
740
741 bzero(&from, sizeof(struct sockaddr_in6));
742 from.sin6_family = AF_INET6;
743 from.sin6_len = sizeof(struct sockaddr_in6);
744 from.sin6_addr = ip6->ip6_src;
745
746 bzero(&to, sizeof(struct sockaddr_in6));
747 to.sin6_family = AF_INET6;
748 to.sin6_len = sizeof(struct sockaddr_in6);
749 to.sin6_addr = ip6->ip6_dst;
750
751 in6p->in6p_route.ro_dst.sin6_family = AF_INET6;
752 in6p->in6p_route.ro_dst.sin6_len = sizeof(struct sockaddr_in6);
753 ((struct sockaddr_in6 *)(void *)&in6p->in6p_route.ro_dst)->sin6_addr =
754 ip6->ip6_dst;
755
756 rtalloc_scoped((struct route *)&in6p->in6p_route, ip6oa.ip6oa_boundif);
757
758 inp_update_necp_policy(in6p, (struct sockaddr *)&from,
759 (struct sockaddr *)&to, ip6oa.ip6oa_boundif);
760 in6p->inp_policyresult.results.qos_marking_gencount = 0;
761 }
762
763 if (!necp_socket_is_allowed_to_send_recv_v6(in6p, 0, 0,
764 &ip6->ip6_src, &ip6->ip6_dst, NULL, 0, &policy_id, &route_rule_id, &skip_policy_id, &pass_flags)) {
765 error = EHOSTUNREACH;
766 goto bad;
767 }
768
769 necp_mark_packet_from_socket(m, in6p, policy_id, route_rule_id, skip_policy_id, pass_flags);
770
771 if (net_qos_policy_restricted != 0) {
772 necp_socket_update_qos_marking(in6p, in6p->in6p_route.ro_rt, route_rule_id);
773 }
774 }
775 #endif /* NECP */
776 if ((so->so_flags1 & SOF1_QOSMARKING_ALLOWED)) {
777 ip6oa.ip6oa_flags |= IP6OAF_QOSMARKING_ALLOWED;
778 }
779
780 #if IPSEC
781 if (in6p->in6p_sp != NULL && ipsec_setsocket(m, so) != 0) {
782 error = ENOBUFS;
783 goto bad;
784 }
785 #endif /*IPSEC*/
786
787 if (ROUTE_UNUSABLE(&in6p->in6p_route)) {
788 ROUTE_RELEASE(&in6p->in6p_route);
789 }
790
791 if (oifp != NULL) {
792 ifnet_release(oifp);
793 oifp = NULL;
794 }
795
796 set_packet_service_class(m, so, sotc, PKT_SCF_IPV6);
797 m->m_pkthdr.pkt_flowsrc = FLOWSRC_INPCB;
798 m->m_pkthdr.pkt_flowid = in6p->inp_flowhash;
799 m->m_pkthdr.pkt_flags |= (PKTF_FLOW_ID | PKTF_FLOW_LOCALSRC |
800 PKTF_FLOW_RAWSOCK);
801 m->m_pkthdr.pkt_proto = in6p->in6p_ip6_nxt;
802 m->m_pkthdr.tx_rawip_pid = so->last_pid;
803 if (so->so_flags & SOF_DELEGATED) {
804 m->m_pkthdr.tx_rawip_e_pid = so->e_pid;
805 } else {
806 m->m_pkthdr.tx_rawip_e_pid = 0;
807 }
808 #if (DEBUG || DEVELOPMENT)
809 if (so->so_flags & SOF_MARK_WAKE_PKT) {
810 so->so_flags &= ~SOF_MARK_WAKE_PKT;
811 m->m_pkthdr.pkt_flags |= PKTF_WAKE_PKT;
812 }
813 #endif /* (DEBUG || DEVELOPMENT) */
814
815 if (im6o != NULL) {
816 IM6O_ADDREF(im6o);
817 }
818
819 error = ip6_output(m, optp, &in6p->in6p_route, flags, im6o,
820 &oifp, &ip6oa);
821
822 if (im6o != NULL) {
823 IM6O_REMREF(im6o);
824 }
825
826 if (in6p->in6p_route.ro_rt != NULL) {
827 struct rtentry *rt = in6p->in6p_route.ro_rt;
828 struct ifnet *outif;
829
830 if ((rt->rt_flags & RTF_MULTICAST) ||
831 in6p->in6p_socket == NULL ||
832 #if CONTENT_FILTER
833 /* Discard temporary route for cfil case */
834 cfil_faddr_use ||
835 #endif
836 !(in6p->in6p_socket->so_state & SS_ISCONNECTED)) {
837 rt = NULL; /* unusable */
838 }
839 /*
840 * Always discard the cached route for unconnected
841 * socket or if it is a multicast route.
842 */
843 if (rt == NULL) {
844 ROUTE_RELEASE(&in6p->in6p_route);
845 }
846
847 /*
848 * If this is a connected socket and the destination
849 * route is not multicast, update outif with that of
850 * the route interface index used by IP.
851 */
852 if (rt != NULL) {
853 /*
854 * When an NECP IP tunnel policy forces the outbound interface,
855 * ip6_output_list() informs the transport layer what is the actual
856 * outgoing interface
857 */
858 if (ip6oa.ip6oa_flags & IP6OAF_BOUND_IF) {
859 outif = ifindex2ifnet[ip6oa.ip6oa_boundif];
860 } else {
861 outif = rt->rt_ifp;
862 }
863 if (outif != NULL) {
864 in6p->in6p_last_outifp = outif;
865 }
866 }
867 } else {
868 ROUTE_RELEASE(&in6p->in6p_route);
869 }
870
871 /*
872 * If output interface was cellular/expensive, and this socket is
873 * denied access to it, generate an event.
874 */
875 if (error != 0 && (ip6oa.ip6oa_flags & IP6OAF_R_IFDENIED) &&
876 (INP_NO_CELLULAR(in6p) || INP_NO_EXPENSIVE(in6p) || INP_NO_CONSTRAINED(in6p))) {
877 soevent(in6p->inp_socket, (SO_FILT_HINT_LOCKED |
878 SO_FILT_HINT_IFDENIED));
879 }
880
881 if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
882 if (oifp) {
883 icmp6_ifoutstat_inc(oifp, type, code);
884 }
885 icmp6stat.icp6s_outhist[type]++;
886 } else {
887 rip6stat.rip6s_opackets++;
888 }
889
890 goto freectl;
891
892 bad:
893 if (m != NULL) {
894 m_freem(m);
895 }
896
897 freectl:
898 if (optp == &opt && optp->ip6po_rthdr) {
899 ROUTE_RELEASE(&optp->ip6po_route);
900 }
901
902 if (control != NULL) {
903 if (optp == &opt) {
904 ip6_clearpktopts(optp, -1);
905 }
906 m_freem(control);
907 }
908 if (oifp != NULL) {
909 ifnet_release(oifp);
910 }
911 #if CONTENT_FILTER
912 if (cfil_tag) {
913 m_tag_free(cfil_tag);
914 }
915 #endif
916
917 return error;
918 }
919
920 /*
921 * Raw IPv6 socket option processing.
922 */
923 int
rip6_ctloutput(struct socket * so,struct sockopt * sopt)924 rip6_ctloutput(
925 struct socket *so,
926 struct sockopt *sopt)
927 {
928 int error, optval;
929
930 /* Allow <SOL_SOCKET,SO_FLUSH> at this level */
931 if (sopt->sopt_level == IPPROTO_ICMPV6) {
932 /*
933 * XXX: is it better to call icmp6_ctloutput() directly
934 * from protosw?
935 */
936 return icmp6_ctloutput(so, sopt);
937 } else if (sopt->sopt_level != IPPROTO_IPV6 &&
938 !(sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_FLUSH)) {
939 return EINVAL;
940 }
941
942 error = 0;
943
944 switch (sopt->sopt_dir) {
945 case SOPT_GET:
946 switch (sopt->sopt_name) {
947 case IPV6_CHECKSUM:
948 error = ip6_raw_ctloutput(so, sopt);
949 break;
950 default:
951 error = ip6_ctloutput(so, sopt);
952 break;
953 }
954 break;
955
956 case SOPT_SET:
957 switch (sopt->sopt_name) {
958 case IPV6_CHECKSUM:
959 error = ip6_raw_ctloutput(so, sopt);
960 break;
961
962 case SO_FLUSH:
963 if ((error = sooptcopyin(sopt, &optval, sizeof(optval),
964 sizeof(optval))) != 0) {
965 break;
966 }
967
968 error = inp_flush(sotoinpcb(so), optval);
969 break;
970
971 default:
972 error = ip6_ctloutput(so, sopt);
973 break;
974 }
975 break;
976 }
977
978 return error;
979 }
980
981 static int
rip6_attach(struct socket * so,int proto,struct proc * p)982 rip6_attach(struct socket *so, int proto, struct proc *p)
983 {
984 struct inpcb *inp;
985 int error;
986
987 inp = sotoinpcb(so);
988 if (inp) {
989 panic("rip6_attach");
990 }
991 if ((error = proc_suser(p)) != 0) {
992 return error;
993 }
994
995 error = soreserve(so, rip_sendspace, rip_recvspace);
996 if (error) {
997 return error;
998 }
999 error = in_pcballoc(so, &ripcbinfo, p);
1000 if (error) {
1001 return error;
1002 }
1003 inp = (struct inpcb *)so->so_pcb;
1004 inp->inp_vflag |= INP_IPV6;
1005 inp->in6p_ip6_nxt = (char)proto;
1006 inp->in6p_hops = -1; /* use kernel default */
1007 inp->in6p_cksum = -1;
1008 inp->in6p_icmp6filt = kalloc_type(struct icmp6_filter,
1009 Z_WAITOK | Z_NOFAIL);
1010 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
1011 return 0;
1012 }
1013
1014 static int
rip6_detach(struct socket * so)1015 rip6_detach(struct socket *so)
1016 {
1017 struct inpcb *inp;
1018
1019 inp = sotoinpcb(so);
1020 if (inp == 0) {
1021 panic("rip6_detach");
1022 }
1023 /* xxx: RSVP */
1024 if (inp->in6p_icmp6filt) {
1025 kfree_type(struct icmp6_filter, inp->in6p_icmp6filt);
1026 inp->in6p_icmp6filt = NULL;
1027 }
1028 in6_pcbdetach(inp);
1029 return 0;
1030 }
1031
1032 static int
rip6_abort(struct socket * so)1033 rip6_abort(struct socket *so)
1034 {
1035 soisdisconnected(so);
1036 return rip6_detach(so);
1037 }
1038
1039 static int
rip6_disconnect(struct socket * so)1040 rip6_disconnect(struct socket *so)
1041 {
1042 struct inpcb *inp = sotoinpcb(so);
1043
1044 if ((so->so_state & SS_ISCONNECTED) == 0) {
1045 return ENOTCONN;
1046 }
1047 inp->in6p_faddr = in6addr_any;
1048 inp->inp_fifscope = IFSCOPE_NONE;
1049 return rip6_abort(so);
1050 }
1051
1052 static int
rip6_bind(struct socket * so,struct sockaddr * nam,struct proc * p)1053 rip6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
1054 {
1055 #pragma unused(p)
1056 struct inpcb *inp = sotoinpcb(so);
1057 struct sockaddr_in6 sin6;
1058 struct ifaddr *ifa = NULL;
1059 struct ifnet *outif = NULL;
1060 uint32_t ifscope = IFSCOPE_NONE;
1061 int error;
1062
1063 if (inp == NULL
1064 #if NECP
1065 || (necp_socket_should_use_flow_divert(inp))
1066 #endif /* NECP */
1067 ) {
1068 return inp == NULL ? EINVAL : EPROTOTYPE;
1069 }
1070
1071 if (nam->sa_len != sizeof(struct sockaddr_in6)) {
1072 return EINVAL;
1073 }
1074
1075 if (TAILQ_EMPTY(&ifnet_head) || SIN6(nam)->sin6_family != AF_INET6) {
1076 return EADDRNOTAVAIL;
1077 }
1078
1079 bzero(&sin6, sizeof(sin6));
1080 *(&sin6) = *SIN6(nam);
1081
1082 if ((error = sa6_embedscope(&sin6, ip6_use_defzone, &ifscope)) != 0) {
1083 return error;
1084 }
1085
1086 /* Sanitize local copy for address searches */
1087 sin6.sin6_flowinfo = 0;
1088 sin6.sin6_port = 0;
1089 if (in6_embedded_scope) {
1090 sin6.sin6_scope_id = 0;
1091 }
1092
1093 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) &&
1094 (ifa = ifa_ifwithaddr(SA(&sin6))) == 0) {
1095 return EADDRNOTAVAIL;
1096 }
1097 if (ifa != NULL) {
1098 IFA_LOCK(ifa);
1099 if (((struct in6_ifaddr *)ifa)->ia6_flags &
1100 (IN6_IFF_ANYCAST | IN6_IFF_NOTREADY | IN6_IFF_CLAT46 |
1101 IN6_IFF_DETACHED | IN6_IFF_DEPRECATED)) {
1102 IFA_UNLOCK(ifa);
1103 IFA_REMREF(ifa);
1104 return EADDRNOTAVAIL;
1105 }
1106 outif = ifa->ifa_ifp;
1107 IFA_UNLOCK(ifa);
1108 IFA_REMREF(ifa);
1109 }
1110 inp->in6p_laddr = sin6.sin6_addr;
1111 inp->in6p_last_outifp = outif;
1112 inp->inp_lifscope = ifscope;
1113 in6_verify_ifscope(&inp->in6p_laddr, inp->inp_lifscope);
1114 return 0;
1115 }
1116
1117 static int
rip6_connect(struct socket * so,struct sockaddr * nam,__unused struct proc * p)1118 rip6_connect(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
1119 {
1120 struct inpcb *inp = sotoinpcb(so);
1121 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)(void *)nam;
1122 struct in6_addr *in6a = NULL;
1123 struct in6_addr storage;
1124 int error = 0;
1125 #if ENABLE_DEFAULT_SCOPE
1126 struct sockaddr_in6 tmp;
1127 #endif
1128 unsigned int ifscope;
1129 struct ifnet *outif = NULL;
1130
1131 if (inp == NULL
1132 #if NECP
1133 || (necp_socket_should_use_flow_divert(inp))
1134 #endif /* NECP */
1135 ) {
1136 return inp == NULL ? EINVAL : EPROTOTYPE;
1137 }
1138 if (nam->sa_len != sizeof(*addr)) {
1139 return EINVAL;
1140 }
1141 if (TAILQ_EMPTY(&ifnet_head)) {
1142 return EADDRNOTAVAIL;
1143 }
1144 if (addr->sin6_family != AF_INET6) {
1145 return EAFNOSUPPORT;
1146 }
1147
1148 if (!(so->so_flags1 & SOF1_CONNECT_COUNTED)) {
1149 so->so_flags1 |= SOF1_CONNECT_COUNTED;
1150 INC_ATOMIC_INT64_LIM(net_api_stats.nas_socket_inet6_dgram_connected);
1151 }
1152
1153 #if ENABLE_DEFAULT_SCOPE
1154 if (addr->sin6_scope_id == 0) { /* not change if specified */
1155 /* avoid overwrites */
1156 tmp = *addr;
1157 addr = &tmp;
1158 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
1159 }
1160 #endif
1161
1162 /* KAME hack: embed scopeid */
1163 if (in6_embedscope(&SIN6(nam)->sin6_addr, SIN6(nam), inp, NULL, NULL, IN6_NULL_IF_EMBEDDED_SCOPE(&SIN6(nam)->sin6_scope_id)) != 0) {
1164 return EINVAL;
1165 }
1166
1167 ifscope = (inp->inp_flags & INP_BOUND_IF) ?
1168 inp->inp_boundifp->if_index : IFSCOPE_NONE;
1169
1170 /* Source address selection. XXX: need pcblookup? */
1171 struct ifnet *src_ifp = NULL;
1172 in6a = in6_selectsrc(addr, inp->in6p_outputopts, inp, &inp->in6p_route,
1173 &src_ifp, &storage, ifscope, &error);
1174 if (src_ifp != NULL) {
1175 if (in6a != NULL) {
1176 inp->inp_lifscope = in6_addr2scopeid(src_ifp, in6a);
1177 }
1178 ifnet_release(src_ifp);
1179 src_ifp = NULL;
1180 }
1181 if (IN6_IS_SCOPE_EMBED(&addr->sin6_addr) && inp->inp_lifscope == IFSCOPE_NONE) {
1182 inp->inp_lifscope = addr->sin6_scope_id;
1183 }
1184
1185 if (in6a == NULL) {
1186 return error ? error : EADDRNOTAVAIL;
1187 }
1188 inp->in6p_laddr = *in6a;
1189 inp->in6p_faddr = addr->sin6_addr;
1190 if (inp->in6p_route.ro_rt != NULL) {
1191 outif = inp->in6p_route.ro_rt->rt_ifp;
1192 }
1193 inp->in6p_last_outifp = outif;
1194 in6_verify_ifscope(&inp->in6p_laddr, inp->inp_lifscope);
1195 inp->inp_fifscope = addr->sin6_scope_id;
1196 in6_verify_ifscope(&inp->in6p_faddr, inp->inp_fifscope);
1197
1198 soisconnected(so);
1199 return 0;
1200 }
1201
1202 static int
rip6_shutdown(struct socket * so)1203 rip6_shutdown(struct socket *so)
1204 {
1205 socantsendmore(so);
1206 return 0;
1207 }
1208
1209 static int
rip6_send(struct socket * so,int flags,struct mbuf * m,struct sockaddr * nam,struct mbuf * control,struct proc * p)1210 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
1211 struct mbuf *control, struct proc *p)
1212 {
1213 #pragma unused(flags, p)
1214 struct inpcb *inp = sotoinpcb(so);
1215 int error = 0;
1216
1217 if (inp == NULL
1218 #if NECP
1219 || (necp_socket_should_use_flow_divert(inp))
1220 #endif /* NECP */
1221 ) {
1222 if (inp == NULL) {
1223 error = EINVAL;
1224 } else {
1225 error = EPROTOTYPE;
1226 }
1227 goto bad;
1228 }
1229
1230 return rip6_output(m, so, SIN6(nam), control, 1);
1231
1232 bad:
1233 VERIFY(error != 0);
1234
1235 if (m != NULL) {
1236 m_freem(m);
1237 }
1238 if (control != NULL) {
1239 m_freem(control);
1240 }
1241
1242 return error;
1243 }
1244
1245 struct pr_usrreqs rip6_usrreqs = {
1246 .pru_abort = rip6_abort,
1247 .pru_attach = rip6_attach,
1248 .pru_bind = rip6_bind,
1249 .pru_connect = rip6_connect,
1250 .pru_control = in6_control,
1251 .pru_detach = rip6_detach,
1252 .pru_disconnect = rip6_disconnect,
1253 .pru_peeraddr = in6_getpeeraddr,
1254 .pru_send = rip6_send,
1255 .pru_shutdown = rip6_shutdown,
1256 .pru_sockaddr = in6_getsockaddr,
1257 .pru_sosend = sosend,
1258 .pru_soreceive = soreceive,
1259 };
1260
1261 __private_extern__ struct pr_usrreqs icmp6_dgram_usrreqs = {
1262 .pru_abort = rip6_abort,
1263 .pru_attach = icmp6_dgram_attach,
1264 .pru_bind = rip6_bind,
1265 .pru_connect = rip6_connect,
1266 .pru_control = in6_control,
1267 .pru_detach = rip6_detach,
1268 .pru_disconnect = rip6_disconnect,
1269 .pru_peeraddr = in6_getpeeraddr,
1270 .pru_send = icmp6_dgram_send,
1271 .pru_shutdown = rip6_shutdown,
1272 .pru_sockaddr = in6_getsockaddr,
1273 .pru_sosend = sosend,
1274 .pru_soreceive = soreceive,
1275 };
1276