2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1988, 1993
5 * The Regents of the University of California.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
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16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 #include "opt_inet6.h"
40 #include "opt_ipsec.h"
42 #include <sys/param.h>
44 #include <sys/kernel.h>
45 #include <sys/eventhandler.h>
47 #include <sys/malloc.h>
51 #include <sys/protosw.h>
52 #include <sys/rmlock.h>
53 #include <sys/rwlock.h>
54 #include <sys/signalvar.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
58 #include <sys/sysctl.h>
59 #include <sys/systm.h>
64 #include <net/if_var.h>
65 #include <net/route.h>
68 #include <netinet/in.h>
69 #include <netinet/in_systm.h>
70 #include <netinet/in_pcb.h>
71 #include <netinet/in_var.h>
72 #include <netinet/if_ether.h>
73 #include <netinet/ip.h>
74 #include <netinet/ip_var.h>
75 #include <netinet/ip_mroute.h>
76 #include <netinet/ip_icmp.h>
78 #include <netipsec/ipsec_support.h>
80 #include <machine/stdarg.h>
81 #include <security/mac/mac_framework.h>
83 VNET_DEFINE(int, ip_defttl) = IPDEFTTL;
84 SYSCTL_INT(_net_inet_ip, IPCTL_DEFTTL, ttl, CTLFLAG_VNET | CTLFLAG_RW,
85 &VNET_NAME(ip_defttl), 0,
86 "Maximum TTL on IP packets");
88 VNET_DEFINE(struct inpcbhead, ripcb);
89 VNET_DEFINE(struct inpcbinfo, ripcbinfo);
91 #define V_ripcb VNET(ripcb)
92 #define V_ripcbinfo VNET(ripcbinfo)
95 * Control and data hooks for ipfw, dummynet, divert and so on.
96 * The data hooks are not used here but it is convenient
97 * to keep them all in one place.
99 VNET_DEFINE(ip_fw_chk_ptr_t, ip_fw_chk_ptr) = NULL;
100 VNET_DEFINE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr) = NULL;
102 int (*ip_dn_ctl_ptr)(struct sockopt *);
103 int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *);
104 void (*ip_divert_ptr)(struct mbuf *, int);
105 int (*ng_ipfw_input_p)(struct mbuf **, int,
106 struct ip_fw_args *, int);
110 * Hooks for multicast routing. They all default to NULL, so leave them not
111 * initialized and rely on BSS being set to 0.
115 * The socket used to communicate with the multicast routing daemon.
117 VNET_DEFINE(struct socket *, ip_mrouter);
120 * The various mrouter and rsvp functions.
122 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
123 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
124 int (*ip_mrouter_done)(void);
125 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
126 struct ip_moptions *);
127 int (*mrt_ioctl)(u_long, caddr_t, int);
128 int (*legal_vif_num)(int);
129 u_long (*ip_mcast_src)(int);
131 int (*rsvp_input_p)(struct mbuf **, int *, int);
132 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
133 void (*ip_rsvp_force_done)(struct socket *);
136 extern struct protosw inetsw[];
138 u_long rip_sendspace = 9216;
139 SYSCTL_ULONG(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
140 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
142 u_long rip_recvspace = 9216;
143 SYSCTL_ULONG(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
144 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams");
150 #define INP_PCBHASH_RAW_SIZE 256
151 #define INP_PCBHASH_RAW(proto, laddr, faddr, mask) \
152 (((proto) + (laddr) + (faddr)) % (mask) + 1)
156 rip_inshash(struct inpcb *inp)
158 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
159 struct inpcbhead *pcbhash;
162 INP_INFO_WLOCK_ASSERT(pcbinfo);
163 INP_WLOCK_ASSERT(inp);
165 if (inp->inp_ip_p != 0 &&
166 inp->inp_laddr.s_addr != INADDR_ANY &&
167 inp->inp_faddr.s_addr != INADDR_ANY) {
168 hash = INP_PCBHASH_RAW(inp->inp_ip_p, inp->inp_laddr.s_addr,
169 inp->inp_faddr.s_addr, pcbinfo->ipi_hashmask);
172 pcbhash = &pcbinfo->ipi_hashbase[hash];
173 CK_LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
177 rip_delhash(struct inpcb *inp)
180 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
181 INP_WLOCK_ASSERT(inp);
183 CK_LIST_REMOVE(inp, inp_hash);
188 * Raw interface to IP protocol.
192 * Initialize raw connection block q.
195 rip_zone_change(void *tag)
198 uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets);
202 rip_inpcb_init(void *mem, int size, int flags)
204 struct inpcb *inp = mem;
206 INP_LOCK_INIT(inp, "inp", "rawinp");
214 in_pcbinfo_init(&V_ripcbinfo, "rip", &V_ripcb, INP_PCBHASH_RAW_SIZE,
215 1, "ripcb", rip_inpcb_init, IPI_HASHFIELDS_NONE);
216 EVENTHANDLER_REGISTER(maxsockets_change, rip_zone_change, NULL,
217 EVENTHANDLER_PRI_ANY);
222 rip_destroy(void *unused __unused)
225 in_pcbinfo_destroy(&V_ripcbinfo);
227 VNET_SYSUNINIT(raw_ip, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH, rip_destroy, NULL);
232 rip_append(struct inpcb *last, struct ip *ip, struct mbuf *n,
233 struct sockaddr_in *ripsrc)
237 INP_LOCK_ASSERT(last);
239 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
240 /* check AH/ESP integrity. */
241 if (IPSEC_ENABLED(ipv4)) {
242 if (IPSEC_CHECK_POLICY(ipv4, n, last) != 0)
247 if (!policyfail && mac_inpcb_check_deliver(last, n) != 0)
250 /* Check the minimum TTL for socket. */
251 if (last->inp_ip_minttl && last->inp_ip_minttl > ip->ip_ttl)
254 struct mbuf *opts = NULL;
257 so = last->inp_socket;
258 if ((last->inp_flags & INP_CONTROLOPTS) ||
259 (so->so_options & (SO_TIMESTAMP | SO_BINTIME)))
260 ip_savecontrol(last, &opts, ip, n);
261 SOCKBUF_LOCK(&so->so_rcv);
262 if (sbappendaddr_locked(&so->so_rcv,
263 (struct sockaddr *)ripsrc, n, opts) == 0) {
264 /* should notify about lost packet */
268 SOCKBUF_UNLOCK(&so->so_rcv);
270 sorwakeup_locked(so);
277 * Setup generic address and protocol structures for raw_input routine, then
278 * pass them along with mbuf chain.
281 rip_input(struct mbuf **mp, int *offp, int proto)
284 struct mbuf *m = *mp;
285 struct ip *ip = mtod(m, struct ip *);
286 struct inpcb *inp, *last;
287 struct sockaddr_in ripsrc;
288 struct epoch_tracker et;
293 bzero(&ripsrc, sizeof(ripsrc));
294 ripsrc.sin_len = sizeof(ripsrc);
295 ripsrc.sin_family = AF_INET;
296 ripsrc.sin_addr = ip->ip_src;
299 ifp = m->m_pkthdr.rcvif;
301 hash = INP_PCBHASH_RAW(proto, ip->ip_src.s_addr,
302 ip->ip_dst.s_addr, V_ripcbinfo.ipi_hashmask);
303 INP_INFO_RLOCK_ET(&V_ripcbinfo, et);
304 CK_LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[hash], inp_hash) {
305 if (inp->inp_ip_p != proto)
308 /* XXX inp locking */
309 if ((inp->inp_vflag & INP_IPV4) == 0)
312 if (inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
314 if (inp->inp_faddr.s_addr != ip->ip_src.s_addr)
319 n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
321 (void) rip_append(last, ip, n, &ripsrc);
322 /* XXX count dropped packet */
327 if (__predict_false(inp->inp_flags2 & INP_FREED))
329 if (jailed_without_vnet(inp->inp_cred)) {
331 * XXX: If faddr was bound to multicast group,
332 * jailed raw socket will drop datagram.
334 if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
342 CK_LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[0], inp_hash) {
343 if (inp->inp_ip_p && inp->inp_ip_p != proto)
346 /* XXX inp locking */
347 if ((inp->inp_vflag & INP_IPV4) == 0)
350 if (!in_nullhost(inp->inp_laddr) &&
351 !in_hosteq(inp->inp_laddr, ip->ip_dst))
353 if (!in_nullhost(inp->inp_faddr) &&
354 !in_hosteq(inp->inp_faddr, ip->ip_src))
359 n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
361 (void) rip_append(last, ip, n, &ripsrc);
362 /* XXX count dropped packet */
367 if (__predict_false(inp->inp_flags2 & INP_FREED))
369 if (jailed_without_vnet(inp->inp_cred)) {
371 * Allow raw socket in jail to receive multicast;
372 * assume process had PRIV_NETINET_RAW at attach,
373 * and fall through into normal filter path if so.
375 if (!IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
376 prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
380 * If this raw socket has multicast state, and we
381 * have received a multicast, check if this socket
382 * should receive it, as multicast filtering is now
383 * the responsibility of the transport layer.
385 if (inp->inp_moptions != NULL &&
386 IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
388 * If the incoming datagram is for IGMP, allow it
389 * through unconditionally to the raw socket.
391 * In the case of IGMPv2, we may not have explicitly
392 * joined the group, and may have set IFF_ALLMULTI
393 * on the interface. imo_multi_filter() may discard
394 * control traffic we actually need to see.
396 * Userland multicast routing daemons should continue
397 * filter the control traffic appropriately.
401 blocked = MCAST_PASS;
402 if (proto != IPPROTO_IGMP) {
403 struct sockaddr_in group;
405 bzero(&group, sizeof(struct sockaddr_in));
406 group.sin_len = sizeof(struct sockaddr_in);
407 group.sin_family = AF_INET;
408 group.sin_addr = ip->ip_dst;
410 blocked = imo_multi_filter(inp->inp_moptions,
412 (struct sockaddr *)&group,
413 (struct sockaddr *)&ripsrc);
416 if (blocked != MCAST_PASS) {
417 IPSTAT_INC(ips_notmember);
426 INP_INFO_RUNLOCK_ET(&V_ripcbinfo, et);
428 if (rip_append(last, ip, m, &ripsrc) != 0)
429 IPSTAT_INC(ips_delivered);
432 if (inetsw[ip_protox[ip->ip_p]].pr_input == rip_input) {
433 IPSTAT_INC(ips_noproto);
434 IPSTAT_DEC(ips_delivered);
435 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PROTOCOL, 0, 0);
440 return (IPPROTO_DONE);
444 * Generate IP header and pass packet to ip_output. Tack on options user may
445 * have setup with control call.
448 rip_output(struct mbuf *m, struct socket *so, ...)
452 struct inpcb *inp = sotoinpcb(so);
455 int flags = ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0) |
458 u_char opttype, optlen, *cp;
461 dst = va_arg(ap, u_long);
465 * If the user handed us a complete IP packet, use it. Otherwise,
466 * allocate an mbuf for a header and fill it in.
468 if ((inp->inp_flags & INP_HDRINCL) == 0) {
469 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
473 M_PREPEND(m, sizeof(struct ip), M_NOWAIT);
478 ip = mtod(m, struct ip *);
479 ip->ip_tos = inp->inp_ip_tos;
480 if (inp->inp_flags & INP_DONTFRAG)
481 ip->ip_off = htons(IP_DF);
483 ip->ip_off = htons(0);
484 ip->ip_p = inp->inp_ip_p;
485 ip->ip_len = htons(m->m_pkthdr.len);
486 ip->ip_src = inp->inp_laddr;
487 ip->ip_dst.s_addr = dst;
488 if (jailed(inp->inp_cred)) {
490 * prison_local_ip4() would be good enough but would
491 * let a source of INADDR_ANY pass, which we do not
492 * want to see from jails.
494 if (ip->ip_src.s_addr == INADDR_ANY) {
495 error = in_pcbladdr(inp, &ip->ip_dst, &ip->ip_src,
498 error = prison_local_ip4(inp->inp_cred,
507 ip->ip_ttl = inp->inp_ip_ttl;
509 if (m->m_pkthdr.len > IP_MAXPACKET) {
513 ip = mtod(m, struct ip *);
514 hlen = ip->ip_hl << 2;
515 if (m->m_len < hlen) {
516 m = m_pullup(m, hlen);
519 ip = mtod(m, struct ip *);
524 * Don't allow both user specified and setsockopt options,
525 * and don't allow packet length sizes that will crash.
527 if ((hlen < sizeof (*ip))
528 || ((hlen > sizeof (*ip)) && inp->inp_options)
529 || (ntohs(ip->ip_len) != m->m_pkthdr.len)) {
534 error = prison_check_ip4(inp->inp_cred, &ip->ip_src);
541 * Don't allow IP options which do not have the required
542 * structure as specified in section 3.1 of RFC 791 on
545 cp = (u_char *)(ip + 1);
546 cnt = hlen - sizeof (struct ip);
547 for (; cnt > 0; cnt -= optlen, cp += optlen) {
548 opttype = cp[IPOPT_OPTVAL];
549 if (opttype == IPOPT_EOL)
551 if (opttype == IPOPT_NOP) {
555 if (cnt < IPOPT_OLEN + sizeof(u_char)) {
560 optlen = cp[IPOPT_OLEN];
561 if (optlen < IPOPT_OLEN + sizeof(u_char) ||
569 * This doesn't allow application to specify ID of zero,
570 * but we got this limitation from the beginning of history.
576 * XXX prevent ip_output from overwriting header fields.
578 flags |= IP_RAWOUTPUT;
579 IPSTAT_INC(ips_rawout);
582 if (inp->inp_flags & INP_ONESBCAST)
583 flags |= IP_SENDONES;
586 mac_inpcb_create_mbuf(inp, m);
589 error = ip_output(m, inp->inp_options, NULL, flags,
590 inp->inp_moptions, inp);
596 * Raw IP socket option processing.
598 * IMPORTANT NOTE regarding access control: Traditionally, raw sockets could
599 * only be created by a privileged process, and as such, socket option
600 * operations to manage system properties on any raw socket were allowed to
601 * take place without explicit additional access control checks. However,
602 * raw sockets can now also be created in jail(), and therefore explicit
603 * checks are now required. Likewise, raw sockets can be used by a process
604 * after it gives up privilege, so some caution is required. For options
605 * passed down to the IP layer via ip_ctloutput(), checks are assumed to be
606 * performed in ip_ctloutput() and therefore no check occurs here.
607 * Unilaterally checking priv_check() here breaks normal IP socket option
608 * operations on raw sockets.
610 * When adding new socket options here, make sure to add access control
611 * checks here as necessary.
613 * XXX-BZ inp locking?
616 rip_ctloutput(struct socket *so, struct sockopt *sopt)
618 struct inpcb *inp = sotoinpcb(so);
621 if (sopt->sopt_level != IPPROTO_IP) {
622 if ((sopt->sopt_level == SOL_SOCKET) &&
623 (sopt->sopt_name == SO_SETFIB)) {
624 inp->inp_inc.inc_fibnum = so->so_fibnum;
631 switch (sopt->sopt_dir) {
633 switch (sopt->sopt_name) {
635 optval = inp->inp_flags & INP_HDRINCL;
636 error = sooptcopyout(sopt, &optval, sizeof optval);
639 case IP_FW3: /* generic ipfw v.3 functions */
640 case IP_FW_ADD: /* ADD actually returns the body... */
642 case IP_FW_TABLE_GETSIZE:
643 case IP_FW_TABLE_LIST:
644 case IP_FW_NAT_GET_CONFIG:
645 case IP_FW_NAT_GET_LOG:
646 if (V_ip_fw_ctl_ptr != NULL)
647 error = V_ip_fw_ctl_ptr(sopt);
652 case IP_DUMMYNET3: /* generic dummynet v.3 functions */
653 case IP_DUMMYNET_GET:
654 if (ip_dn_ctl_ptr != NULL)
655 error = ip_dn_ctl_ptr(sopt);
668 case MRT_API_SUPPORT:
670 case MRT_ADD_BW_UPCALL:
671 case MRT_DEL_BW_UPCALL:
672 error = priv_check(curthread, PRIV_NETINET_MROUTE);
675 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
680 error = ip_ctloutput(so, sopt);
686 switch (sopt->sopt_name) {
688 error = sooptcopyin(sopt, &optval, sizeof optval,
693 inp->inp_flags |= INP_HDRINCL;
695 inp->inp_flags &= ~INP_HDRINCL;
698 case IP_FW3: /* generic ipfw v.3 functions */
704 case IP_FW_TABLE_ADD:
705 case IP_FW_TABLE_DEL:
706 case IP_FW_TABLE_FLUSH:
709 if (V_ip_fw_ctl_ptr != NULL)
710 error = V_ip_fw_ctl_ptr(sopt);
715 case IP_DUMMYNET3: /* generic dummynet v.3 functions */
716 case IP_DUMMYNET_CONFIGURE:
717 case IP_DUMMYNET_DEL:
718 case IP_DUMMYNET_FLUSH:
719 if (ip_dn_ctl_ptr != NULL)
720 error = ip_dn_ctl_ptr(sopt);
722 error = ENOPROTOOPT ;
726 error = priv_check(curthread, PRIV_NETINET_MROUTE);
729 error = ip_rsvp_init(so);
733 error = priv_check(curthread, PRIV_NETINET_MROUTE);
736 error = ip_rsvp_done();
740 case IP_RSVP_VIF_OFF:
741 error = priv_check(curthread, PRIV_NETINET_MROUTE);
744 error = ip_rsvp_vif ?
745 ip_rsvp_vif(so, sopt) : EINVAL;
756 case MRT_API_SUPPORT:
758 case MRT_ADD_BW_UPCALL:
759 case MRT_DEL_BW_UPCALL:
760 error = priv_check(curthread, PRIV_NETINET_MROUTE);
763 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
768 error = ip_ctloutput(so, sopt);
778 * This function exists solely to receive the PRC_IFDOWN messages which are
779 * sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, and calls
780 * in_ifadown() to remove all routes corresponding to that address. It also
781 * receives the PRC_IFUP messages from if_up() and reinstalls the interface
785 rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
787 struct rm_priotracker in_ifa_tracker;
788 struct in_ifaddr *ia;
795 IN_IFADDR_RLOCK(&in_ifa_tracker);
796 CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
797 if (ia->ia_ifa.ifa_addr == sa
798 && (ia->ia_flags & IFA_ROUTE)) {
799 ifa_ref(&ia->ia_ifa);
800 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
802 * in_scrubprefix() kills the interface route.
804 in_scrubprefix(ia, 0);
806 * in_ifadown gets rid of all the rest of the
807 * routes. This is not quite the right thing
808 * to do, but at least if we are running a
809 * routing process they will come back.
811 in_ifadown(&ia->ia_ifa, 0);
812 ifa_free(&ia->ia_ifa);
816 if (ia == NULL) /* If ia matched, already unlocked. */
817 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
821 IN_IFADDR_RLOCK(&in_ifa_tracker);
822 CK_STAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
823 if (ia->ia_ifa.ifa_addr == sa)
826 if (ia == NULL || (ia->ia_flags & IFA_ROUTE)) {
827 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
830 ifa_ref(&ia->ia_ifa);
831 IN_IFADDR_RUNLOCK(&in_ifa_tracker);
833 ifp = ia->ia_ifa.ifa_ifp;
835 if ((ifp->if_flags & IFF_LOOPBACK)
836 || (ifp->if_flags & IFF_POINTOPOINT))
839 err = ifa_del_loopback_route((struct ifaddr *)ia, sa);
841 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
843 ia->ia_flags |= IFA_ROUTE;
845 err = ifa_add_loopback_route((struct ifaddr *)ia, sa);
847 ifa_free(&ia->ia_ifa);
853 rip_attach(struct socket *so, int proto, struct thread *td)
859 KASSERT(inp == NULL, ("rip_attach: inp != NULL"));
861 error = priv_check(td, PRIV_NETINET_RAW);
864 if (proto >= IPPROTO_MAX || proto < 0)
865 return EPROTONOSUPPORT;
866 error = soreserve(so, rip_sendspace, rip_recvspace);
869 INP_INFO_WLOCK(&V_ripcbinfo);
870 error = in_pcballoc(so, &V_ripcbinfo);
872 INP_INFO_WUNLOCK(&V_ripcbinfo);
875 inp = (struct inpcb *)so->so_pcb;
876 inp->inp_vflag |= INP_IPV4;
877 inp->inp_ip_p = proto;
878 inp->inp_ip_ttl = V_ip_defttl;
880 INP_INFO_WUNLOCK(&V_ripcbinfo);
886 rip_detach(struct socket *so)
891 KASSERT(inp != NULL, ("rip_detach: inp == NULL"));
892 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
893 ("rip_detach: not closed"));
895 INP_INFO_WLOCK(&V_ripcbinfo);
898 if (so == V_ip_mrouter && ip_mrouter_done)
900 if (ip_rsvp_force_done)
901 ip_rsvp_force_done(so);
902 if (so == V_ip_rsvpd)
906 INP_INFO_WUNLOCK(&V_ripcbinfo);
910 rip_dodisconnect(struct socket *so, struct inpcb *inp)
912 struct inpcbinfo *pcbinfo;
914 pcbinfo = inp->inp_pcbinfo;
915 INP_INFO_WLOCK(pcbinfo);
918 inp->inp_faddr.s_addr = INADDR_ANY;
921 so->so_state &= ~SS_ISCONNECTED;
924 INP_INFO_WUNLOCK(pcbinfo);
928 rip_abort(struct socket *so)
933 KASSERT(inp != NULL, ("rip_abort: inp == NULL"));
935 rip_dodisconnect(so, inp);
939 rip_close(struct socket *so)
944 KASSERT(inp != NULL, ("rip_close: inp == NULL"));
946 rip_dodisconnect(so, inp);
950 rip_disconnect(struct socket *so)
954 if ((so->so_state & SS_ISCONNECTED) == 0)
958 KASSERT(inp != NULL, ("rip_disconnect: inp == NULL"));
960 rip_dodisconnect(so, inp);
965 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
967 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
971 if (nam->sa_len != sizeof(*addr))
974 error = prison_check_ip4(td->td_ucred, &addr->sin_addr);
979 KASSERT(inp != NULL, ("rip_bind: inp == NULL"));
981 if (CK_STAILQ_EMPTY(&V_ifnet) ||
982 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) ||
983 (addr->sin_addr.s_addr &&
984 (inp->inp_flags & INP_BINDANY) == 0 &&
985 ifa_ifwithaddr_check((struct sockaddr *)addr) == 0))
986 return (EADDRNOTAVAIL);
988 INP_INFO_WLOCK(&V_ripcbinfo);
991 inp->inp_laddr = addr->sin_addr;
994 INP_INFO_WUNLOCK(&V_ripcbinfo);
999 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
1001 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
1004 if (nam->sa_len != sizeof(*addr))
1006 if (CK_STAILQ_EMPTY(&V_ifnet))
1007 return (EADDRNOTAVAIL);
1008 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK)
1009 return (EAFNOSUPPORT);
1011 inp = sotoinpcb(so);
1012 KASSERT(inp != NULL, ("rip_connect: inp == NULL"));
1014 INP_INFO_WLOCK(&V_ripcbinfo);
1017 inp->inp_faddr = addr->sin_addr;
1021 INP_INFO_WUNLOCK(&V_ripcbinfo);
1026 rip_shutdown(struct socket *so)
1030 inp = sotoinpcb(so);
1031 KASSERT(inp != NULL, ("rip_shutdown: inp == NULL"));
1040 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
1041 struct mbuf *control, struct thread *td)
1046 inp = sotoinpcb(so);
1047 KASSERT(inp != NULL, ("rip_send: inp == NULL"));
1050 * Note: 'dst' reads below are unlocked.
1052 if (so->so_state & SS_ISCONNECTED) {
1057 dst = inp->inp_faddr.s_addr; /* Unlocked read. */
1063 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
1065 return (rip_output(m, so, dst));
1070 rip_pcblist(SYSCTL_HANDLER_ARGS)
1073 struct inpcb *inp, **inp_list;
1076 struct epoch_tracker et;
1079 * The process of preparing the TCB list is too time-consuming and
1080 * resource-intensive to repeat twice on every request.
1082 if (req->oldptr == 0) {
1083 n = V_ripcbinfo.ipi_count;
1084 n += imax(n / 8, 10);
1085 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
1089 if (req->newptr != 0)
1093 * OK, now we're committed to doing something.
1095 INP_INFO_WLOCK(&V_ripcbinfo);
1096 gencnt = V_ripcbinfo.ipi_gencnt;
1097 n = V_ripcbinfo.ipi_count;
1098 INP_INFO_WUNLOCK(&V_ripcbinfo);
1100 bzero(&xig, sizeof(xig));
1101 xig.xig_len = sizeof xig;
1103 xig.xig_gen = gencnt;
1104 xig.xig_sogen = so_gencnt;
1105 error = SYSCTL_OUT(req, &xig, sizeof xig);
1109 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
1111 INP_INFO_RLOCK_ET(&V_ripcbinfo, et);
1112 for (inp = CK_LIST_FIRST(V_ripcbinfo.ipi_listhead), i = 0; inp && i < n;
1113 inp = CK_LIST_NEXT(inp, inp_list)) {
1115 if (inp->inp_gencnt <= gencnt &&
1116 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
1118 inp_list[i++] = inp;
1122 INP_INFO_RUNLOCK_ET(&V_ripcbinfo, et);
1126 for (i = 0; i < n; i++) {
1129 if (inp->inp_gencnt <= gencnt) {
1132 in_pcbtoxinpcb(inp, &xi);
1134 error = SYSCTL_OUT(req, &xi, sizeof xi);
1138 INP_INFO_WLOCK(&V_ripcbinfo);
1139 for (i = 0; i < n; i++) {
1142 if (!in_pcbrele_rlocked(inp))
1145 INP_INFO_WUNLOCK(&V_ripcbinfo);
1148 struct epoch_tracker et;
1150 * Give the user an updated idea of our state. If the
1151 * generation differs from what we told her before, she knows
1152 * that something happened while we were processing this
1153 * request, and it might be necessary to retry.
1155 INP_INFO_RLOCK_ET(&V_ripcbinfo, et);
1156 xig.xig_gen = V_ripcbinfo.ipi_gencnt;
1157 xig.xig_sogen = so_gencnt;
1158 xig.xig_count = V_ripcbinfo.ipi_count;
1159 INP_INFO_RUNLOCK_ET(&V_ripcbinfo, et);
1160 error = SYSCTL_OUT(req, &xig, sizeof xig);
1162 free(inp_list, M_TEMP);
1166 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist,
1167 CTLTYPE_OPAQUE | CTLFLAG_RD, NULL, 0,
1168 rip_pcblist, "S,xinpcb", "List of active raw IP sockets");
1171 struct pr_usrreqs rip_usrreqs = {
1172 .pru_abort = rip_abort,
1173 .pru_attach = rip_attach,
1174 .pru_bind = rip_bind,
1175 .pru_connect = rip_connect,
1176 .pru_control = in_control,
1177 .pru_detach = rip_detach,
1178 .pru_disconnect = rip_disconnect,
1179 .pru_peeraddr = in_getpeeraddr,
1180 .pru_send = rip_send,
1181 .pru_shutdown = rip_shutdown,
1182 .pru_sockaddr = in_getsockaddr,
1183 .pru_sosetlabel = in_pcbsosetlabel,
1184 .pru_close = rip_close,