2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/sys/netinet6/raw_ip6.c,v 1.7.2.7 2003/01/24 05:11:35 sam Exp $
33 * Copyright (c) 1982, 1986, 1988, 1993
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
63 #include "opt_ipsec.h"
64 #include "opt_inet6.h"
66 #include <sys/param.h>
67 #include <sys/malloc.h>
71 #include <sys/socket.h>
73 #include <sys/protosw.h>
74 #include <sys/socketvar.h>
75 #include <sys/errno.h>
76 #include <sys/systm.h>
78 #include <sys/thread2.h>
79 #include <sys/socketvar2.h>
80 #include <sys/msgport2.h>
83 #include <net/route.h>
84 #include <net/if_types.h>
86 #include <netinet/in.h>
87 #include <netinet/in_var.h>
88 #include <netinet/in_systm.h>
89 #include <netinet/ip6.h>
90 #include <netinet6/ip6_var.h>
91 #include <netinet6/ip6_mroute.h>
92 #include <netinet/icmp6.h>
93 #include <netinet/in_pcb.h>
94 #include <netinet6/in6_pcb.h>
95 #include <netinet6/nd6.h>
96 #include <netinet6/ip6protosw.h>
97 #ifdef ENABLE_DEFAULT_SCOPE
98 #include <netinet6/scope6_var.h>
100 #include <netinet6/raw_ip6.h>
103 #include <netinet6/ipsec.h>
104 #include <netinet6/ipsec6.h>
108 #include <netproto/ipsec/ipsec.h>
109 #include <netproto/ipsec/ipsec6.h>
110 #endif /* FAST_IPSEC */
112 #include <machine/stdarg.h>
114 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
115 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
118 * Raw interface to IP6 protocol.
121 extern struct inpcbinfo ripcbinfo;
122 extern u_long rip_sendspace;
123 extern u_long rip_recvspace;
125 struct rip6stat rip6stat;
128 * Setup generic address and protocol structures
129 * for raw_input routine, then pass them along with
133 rip6_input(struct mbuf **mp, int *offp, int proto)
135 struct mbuf *m = *mp;
136 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
138 struct inpcb *last = NULL;
139 struct mbuf *opts = NULL;
140 struct sockaddr_in6 rip6src;
142 rip6stat.rip6s_ipackets++;
144 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
145 /* XXX send icmp6 host/port unreach? */
150 init_sin6(&rip6src, m); /* general init */
152 LIST_FOREACH(in6p, &ripcbinfo.pcblisthead, inp_list) {
153 if (in6p->in6p_flags & INP_PLACEMARKER)
155 if (!(in6p->in6p_vflag & INP_IPV6))
157 if (in6p->in6p_ip6_nxt &&
158 in6p->in6p_ip6_nxt != proto)
160 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
161 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
163 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
164 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
166 if (in6p->in6p_cksum != -1) {
167 rip6stat.rip6s_isum++;
168 if (in6_cksum(m, ip6->ip6_nxt, *offp,
169 m->m_pkthdr.len - *offp)) {
170 rip6stat.rip6s_badsum++;
175 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
179 * Check AH/ESP integrity.
181 if (n && ipsec6_in_reject_so(n, last->inp_socket)) {
183 ipsec6stat.in_polvio++;
184 /* do not inject data into pcb */
189 * Check AH/ESP integrity.
191 if (n && ipsec6_in_reject(n, last)) {
193 /* do not inject data into pcb */
195 #endif /*FAST_IPSEC*/
199 so = last->in6p_socket;
200 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
201 (so->so_options & SO_TIMESTAMP)) {
202 ip6_savecontrol(last, &opts, ip6, n);
204 /* strip intermediate headers */
206 lwkt_gettoken(&so->so_rcv.ssb_token);
207 if (ssb_appendaddr(&so->so_rcv,
208 (struct sockaddr *)&rip6src,
213 rip6stat.rip6s_fullsock++;
217 lwkt_reltoken(&so->so_rcv.ssb_token);
225 * Check AH/ESP integrity.
227 if (last && ipsec6_in_reject_so(m, last->inp_socket)) {
229 ipsec6stat.in_polvio++;
230 ip6stat.ip6s_delivered--;
231 /* do not inject data into pcb */
236 * Check AH/ESP integrity.
238 if (last && ipsec6_in_reject(m, last)) {
240 ip6stat.ip6s_delivered--;
241 /* do not inject data into pcb */
243 #endif /*FAST_IPSEC*/
247 so = last->in6p_socket;
248 if ((last->in6p_flags & IN6P_CONTROLOPTS) ||
249 (so->so_options & SO_TIMESTAMP)) {
250 ip6_savecontrol(last, &opts, ip6, m);
252 /* strip intermediate headers */
254 lwkt_gettoken(&so->so_rcv.ssb_token);
255 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&rip6src,
260 rip6stat.rip6s_fullsock++;
264 lwkt_reltoken(&so->so_rcv.ssb_token);
266 rip6stat.rip6s_nosock++;
267 if (m->m_flags & M_MCAST)
268 rip6stat.rip6s_nosockmcast++;
269 if (proto == IPPROTO_NONE)
272 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
273 icmp6_error(m, ICMP6_PARAM_PROB,
274 ICMP6_PARAMPROB_NEXTHEADER,
275 prvnxtp - mtod(m, char *));
277 ip6stat.ip6s_delivered--;
283 rip6_ctlinput(netmsg_t msg)
285 int cmd = msg->ctlinput.nm_cmd;
286 struct sockaddr *sa = msg->ctlinput.nm_arg;
287 void *d = msg->ctlinput.nm_extra;
288 struct ip6ctlparam *ip6cp = NULL;
289 const struct sockaddr_in6 *sa6_src = NULL;
290 void (*notify) (struct inpcb *, int) = in6_rtchange;
292 if (sa->sa_family != AF_INET6 ||
293 sa->sa_len != sizeof(struct sockaddr_in6))
296 if ((unsigned)cmd >= PRC_NCMDS)
298 if (PRC_IS_REDIRECT(cmd))
299 notify = in6_rtchange, d = NULL;
300 else if (cmd == PRC_HOSTDEAD)
302 else if (inet6ctlerrmap[cmd] == 0)
305 /* if the parameter is from icmp6, decode it. */
307 ip6cp = (struct ip6ctlparam *)d;
308 sa6_src = ip6cp->ip6c_src;
313 in6_pcbnotify(&ripcbinfo.pcblisthead, sa, 0,
314 (const struct sockaddr *)sa6_src, 0, cmd, 0, notify);
316 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0);
320 * Generate IPv6 header and pass packet to ip6_output.
321 * Tack on options user may have setup with control call.
324 rip6_output(struct mbuf *m, struct socket *so, ...)
326 struct sockaddr_in6 *dstsock;
327 struct mbuf *control;
328 struct in6_addr *dst;
331 u_int plen = m->m_pkthdr.len;
333 struct ip6_pktopts opt, *optp = NULL;
334 struct ifnet *oifp = NULL;
335 int type = 0, code = 0; /* for ICMPv6 output statistics only */
340 dstsock = __va_arg(ap, struct sockaddr_in6 *);
341 control = __va_arg(ap, struct mbuf *);
347 if (so->so_cred->cr_uid == 0)
349 dst = &dstsock->sin6_addr;
351 if ((error = ip6_setpktoptions(control, &opt,
352 in6p->in6p_outputopts,
353 so->so_proto->pr_protocol, priv)) != 0)
357 optp = in6p->in6p_outputopts;
360 * For an ICMPv6 packet, we should know its type and code
361 * to update statistics.
363 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
364 struct icmp6_hdr *icmp6;
365 if (m->m_len < sizeof(struct icmp6_hdr) &&
366 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
370 icmp6 = mtod(m, struct icmp6_hdr *);
371 type = icmp6->icmp6_type;
372 code = icmp6->icmp6_code;
375 M_PREPEND(m, sizeof(*ip6), MB_WAIT);
376 ip6 = mtod(m, struct ip6_hdr *);
379 * Next header might not be ICMP6 but use its pseudo header anyway.
384 * If the scope of the destination is link-local, embed the interface
385 * index in the address.
387 * XXX advanced-api value overrides sin6_scope_id
389 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
390 struct in6_pktinfo *pi;
393 * XXX Boundary check is assumed to be already done in
394 * ip6_setpktoptions().
396 if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
397 ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
398 oifp = ifindex2ifnet[pi->ipi6_ifindex];
399 } else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
400 in6p->in6p_moptions &&
401 in6p->in6p_moptions->im6o_multicast_ifp) {
402 oifp = in6p->in6p_moptions->im6o_multicast_ifp;
403 ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
404 } else if (dstsock->sin6_scope_id) {
406 if (dstsock->sin6_scope_id < 0
407 || if_index < dstsock->sin6_scope_id) {
408 error = ENXIO; /* XXX EINVAL? */
411 ip6->ip6_dst.s6_addr16[1]
412 = htons(dstsock->sin6_scope_id & 0xffff);/*XXX*/
417 * Source address selection.
420 struct in6_addr *in6a;
422 if ((in6a = in6_selectsrc(dstsock, optp,
426 &error, NULL)) == NULL) {
428 error = EADDRNOTAVAIL;
431 ip6->ip6_src = *in6a;
432 if (in6p->in6p_route.ro_rt)
433 oifp = ifindex2ifnet[in6p->in6p_route.ro_rt->rt_ifp->if_index];
435 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
436 (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
437 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
438 (IPV6_VERSION & IPV6_VERSION_MASK);
439 /* ip6_plen will be filled in ip6_output, so not fill it here. */
440 ip6->ip6_nxt = in6p->in6p_ip6_nxt;
441 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
443 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
444 in6p->in6p_cksum != -1) {
449 /* compute checksum */
450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
451 off = offsetof(struct icmp6_hdr, icmp6_cksum);
453 off = in6p->in6p_cksum;
454 if (plen < off + 1) {
458 off += sizeof(struct ip6_hdr);
461 while (n && n->m_len <= off) {
467 p = (u_int16_t *)(mtod(n, caddr_t) + off);
469 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
472 error = ip6_output(m, optp, &in6p->in6p_route, 0,
473 in6p->in6p_moptions, &oifp, in6p);
474 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
476 icmp6_ifoutstat_inc(oifp, type, code);
477 icmp6stat.icp6s_outhist[type]++;
479 rip6stat.rip6s_opackets++;
488 if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt)
489 RTFREE(optp->ip6po_route.ro_rt);
492 ip6_clearpktopts(optp, -1);
499 * Raw IPv6 socket option processing.
502 rip6_ctloutput(netmsg_t msg)
504 struct socket *so = msg->ctloutput.base.nm_so;
505 struct sockopt *sopt = msg->ctloutput.nm_sopt;
508 if (sopt->sopt_level == IPPROTO_ICMPV6) {
510 * XXX: is it better to call icmp6_ctloutput() directly
513 icmp6_ctloutput(msg);
514 /* msg invalid now */
517 if (sopt->sopt_level != IPPROTO_IPV6) {
524 switch (sopt->sopt_dir) {
526 switch (sopt->sopt_name) {
534 error = ip6_mrouter_get(so, sopt);
537 error = ip6_raw_ctloutput(so, sopt);
540 error = ip6_ctloutput(so, sopt);
546 switch (sopt->sopt_name) {
554 error = ip6_mrouter_set(so, sopt);
557 error = ip6_raw_ctloutput(so, sopt);
560 error = ip6_ctloutput(so, sopt);
566 lwkt_replymsg(&msg->ctloutput.base.lmsg, error);
570 rip6_attach(netmsg_t msg)
572 struct socket *so = msg->attach.base.nm_so;
573 int proto = msg->attach.nm_proto;
574 struct pru_attach_info *ai = msg->attach.nm_ai;
580 panic("rip6_attach");
581 error = priv_check_cred(ai->p_ucred, PRIV_NETINET_RAW, NULL_CRED_OKAY);
585 error = soreserve(so, rip_sendspace, rip_recvspace, ai->sb_rlimit);
589 error = in_pcballoc(so, &ripcbinfo);
593 inp = (struct inpcb *)so->so_pcb;
594 inp->inp_vflag |= INP_IPV6;
595 inp->in6p_ip6_nxt = (long)proto;
596 inp->in6p_hops = -1; /* use kernel default */
597 inp->in6p_cksum = -1;
598 inp->in6p_icmp6filt = kmalloc(sizeof(struct icmp6_filter), M_PCB,
600 if (inp->in6p_icmp6filt != NULL)
601 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
604 lwkt_replymsg(&msg->attach.base.lmsg, error);
608 rip6_detach(netmsg_t msg)
610 struct socket *so = msg->detach.base.nm_so;
615 panic("rip6_detach");
617 if (so == ip6_mrouter)
619 if (inp->in6p_icmp6filt) {
620 kfree(inp->in6p_icmp6filt, M_PCB);
621 inp->in6p_icmp6filt = NULL;
624 lwkt_replymsg(&msg->detach.base.lmsg, 0);
628 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
629 * will sofree() it when we return.
632 rip6_abort(netmsg_t msg)
634 soisdisconnected(msg->abort.base.nm_so);
636 /* msg invalid now */
640 rip6_disconnect(netmsg_t msg)
642 struct socket *so = msg->disconnect.base.nm_so;
643 struct inpcb *inp = so->so_pcb;
645 if (so->so_state & SS_ISCONNECTED) {
646 inp->in6p_faddr = kin6addr_any;
649 /* msg invalid now */
653 lwkt_replymsg(&msg->disconnect.base.lmsg, ENOTCONN);
657 rip6_bind(netmsg_t msg)
659 struct socket *so = msg->bind.base.nm_so;
660 struct sockaddr *nam = msg->bind.nm_nam;
661 struct inpcb *inp = so->so_pcb;
662 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
663 struct ifaddr *ia = NULL;
666 if (nam->sa_len != sizeof(*addr)) {
671 if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) {
672 error = EADDRNOTAVAIL;
675 #ifdef ENABLE_DEFAULT_SCOPE
676 if (addr->sin6_scope_id == 0) { /* not change if specified */
677 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
680 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
681 (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) {
682 error = EADDRNOTAVAIL;
686 ((struct in6_ifaddr *)ia)->ia6_flags &
687 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
688 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
689 error = EADDRNOTAVAIL;
692 inp->in6p_laddr = addr->sin6_addr;
695 lwkt_replymsg(&msg->bind.base.lmsg, error);
699 rip6_connect(netmsg_t msg)
701 struct socket *so = msg->connect.base.nm_so;
702 struct sockaddr *nam = msg->connect.nm_nam;
703 struct inpcb *inp = so->so_pcb;
704 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
705 struct in6_addr *in6a = NULL;
707 #ifdef ENABLE_DEFAULT_SCOPE
708 struct sockaddr_in6 tmp;
711 if (nam->sa_len != sizeof(*addr)) {
715 if (TAILQ_EMPTY(&ifnet)) {
716 error = EADDRNOTAVAIL;
719 if (addr->sin6_family != AF_INET6) {
720 error = EAFNOSUPPORT;
723 #ifdef ENABLE_DEFAULT_SCOPE
724 if (addr->sin6_scope_id == 0) { /* not change if specified */
725 /* avoid overwrites */
728 addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
731 /* Source address selection. XXX: need pcblookup? */
732 in6a = in6_selectsrc(addr, inp->in6p_outputopts,
733 inp->in6p_moptions, &inp->in6p_route,
734 &inp->in6p_laddr, &error, NULL);
737 error = EADDRNOTAVAIL;
739 inp->in6p_laddr = *in6a;
740 inp->in6p_faddr = addr->sin6_addr;
745 lwkt_replymsg(&msg->connect.base.lmsg, error);
749 rip6_shutdown(netmsg_t msg)
751 socantsendmore(msg->shutdown.base.nm_so);
752 lwkt_replymsg(&msg->shutdown.base.lmsg, 0);
756 rip6_send(netmsg_t msg)
758 struct socket *so = msg->send.base.nm_so;
759 struct mbuf *m = msg->send.nm_m;
760 struct sockaddr *nam = msg->send.nm_addr;
761 struct mbuf *control = msg->send.nm_control;
762 struct inpcb *inp = so->so_pcb;
763 struct sockaddr_in6 tmp;
764 struct sockaddr_in6 *dst;
767 /* always copy sockaddr to avoid overwrites */
768 if (so->so_state & SS_ISCONNECTED) {
775 bzero(&tmp, sizeof(tmp));
776 tmp.sin6_family = AF_INET6;
777 tmp.sin6_len = sizeof(struct sockaddr_in6);
778 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
779 sizeof(struct in6_addr));
787 tmp = *(struct sockaddr_in6 *)nam;
790 #ifdef ENABLE_DEFAULT_SCOPE
791 if (dst->sin6_scope_id == 0) { /* not change if specified */
792 dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
795 error = rip6_output(m, so, dst, control);
797 lwkt_replymsg(&msg->send.base.lmsg, error);
800 struct pr_usrreqs rip6_usrreqs = {
801 .pru_abort = rip6_abort,
802 .pru_accept = pr_generic_notsupp,
803 .pru_attach = rip6_attach,
804 .pru_bind = rip6_bind,
805 .pru_connect = rip6_connect,
806 .pru_connect2 = pr_generic_notsupp,
807 .pru_control = in6_control_dispatch,
808 .pru_detach = rip6_detach,
809 .pru_disconnect = rip6_disconnect,
810 .pru_listen = pr_generic_notsupp,
811 .pru_peeraddr = in6_setpeeraddr_dispatch,
812 .pru_rcvd = pr_generic_notsupp,
813 .pru_rcvoob = pr_generic_notsupp,
814 .pru_send = rip6_send,
815 .pru_sense = pru_sense_null,
816 .pru_shutdown = rip6_shutdown,
817 .pru_sockaddr = in6_setsockaddr_dispatch,
818 .pru_sosend = sosend,
819 .pru_soreceive = soreceive