2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 #include "opt_inet6.h"
38 #include "opt_ipsec.h"
40 #include <sys/param.h>
42 #include <sys/kernel.h>
44 #include <sys/malloc.h>
48 #include <sys/protosw.h>
49 #include <sys/rwlock.h>
50 #include <sys/signalvar.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
54 #include <sys/sysctl.h>
55 #include <sys/systm.h>
60 #include <net/if_var.h>
61 #include <net/route.h>
64 #include <netinet/in.h>
65 #include <netinet/in_systm.h>
66 #include <netinet/in_pcb.h>
67 #include <netinet/in_var.h>
68 #include <netinet/if_ether.h>
69 #include <netinet/ip.h>
70 #include <netinet/ip_var.h>
71 #include <netinet/ip_mroute.h>
74 #include <netipsec/ipsec.h>
77 #include <security/mac/mac_framework.h>
79 VNET_DEFINE(int, ip_defttl) = IPDEFTTL;
80 SYSCTL_VNET_INT(_net_inet_ip, IPCTL_DEFTTL, ttl, CTLFLAG_RW,
81 &VNET_NAME(ip_defttl), 0,
82 "Maximum TTL on IP packets");
84 VNET_DEFINE(struct inpcbhead, ripcb);
85 VNET_DEFINE(struct inpcbinfo, ripcbinfo);
87 #define V_ripcb VNET(ripcb)
88 #define V_ripcbinfo VNET(ripcbinfo)
91 * Control and data hooks for ipfw, dummynet, divert and so on.
92 * The data hooks are not used here but it is convenient
93 * to keep them all in one place.
95 VNET_DEFINE(ip_fw_chk_ptr_t, ip_fw_chk_ptr) = NULL;
96 VNET_DEFINE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr) = NULL;
98 int (*ip_dn_ctl_ptr)(struct sockopt *);
99 int (*ip_dn_io_ptr)(struct mbuf **, int, struct ip_fw_args *);
100 void (*ip_divert_ptr)(struct mbuf *, int);
101 int (*ng_ipfw_input_p)(struct mbuf **, int,
102 struct ip_fw_args *, int);
106 * Hooks for multicast routing. They all default to NULL, so leave them not
107 * initialized and rely on BSS being set to 0.
111 * The socket used to communicate with the multicast routing daemon.
113 VNET_DEFINE(struct socket *, ip_mrouter);
116 * The various mrouter and rsvp functions.
118 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
119 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
120 int (*ip_mrouter_done)(void);
121 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
122 struct ip_moptions *);
123 int (*mrt_ioctl)(u_long, caddr_t, int);
124 int (*legal_vif_num)(int);
125 u_long (*ip_mcast_src)(int);
127 void (*rsvp_input_p)(struct mbuf *m, int off);
128 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
129 void (*ip_rsvp_force_done)(struct socket *);
132 u_long rip_sendspace = 9216;
133 SYSCTL_ULONG(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
134 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
136 u_long rip_recvspace = 9216;
137 SYSCTL_ULONG(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
138 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams");
144 #define INP_PCBHASH_RAW_SIZE 256
145 #define INP_PCBHASH_RAW(proto, laddr, faddr, mask) \
146 (((proto) + (laddr) + (faddr)) % (mask) + 1)
150 rip_inshash(struct inpcb *inp)
152 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
153 struct inpcbhead *pcbhash;
156 INP_INFO_WLOCK_ASSERT(pcbinfo);
157 INP_WLOCK_ASSERT(inp);
159 if (inp->inp_ip_p != 0 &&
160 inp->inp_laddr.s_addr != INADDR_ANY &&
161 inp->inp_faddr.s_addr != INADDR_ANY) {
162 hash = INP_PCBHASH_RAW(inp->inp_ip_p, inp->inp_laddr.s_addr,
163 inp->inp_faddr.s_addr, pcbinfo->ipi_hashmask);
166 pcbhash = &pcbinfo->ipi_hashbase[hash];
167 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
171 rip_delhash(struct inpcb *inp)
174 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
175 INP_WLOCK_ASSERT(inp);
177 LIST_REMOVE(inp, inp_hash);
182 * Raw interface to IP protocol.
186 * Initialize raw connection block q.
189 rip_zone_change(void *tag)
192 uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets);
196 rip_inpcb_init(void *mem, int size, int flags)
198 struct inpcb *inp = mem;
200 INP_LOCK_INIT(inp, "inp", "rawinp");
208 in_pcbinfo_init(&V_ripcbinfo, "rip", &V_ripcb, INP_PCBHASH_RAW_SIZE,
209 1, "ripcb", rip_inpcb_init, NULL, UMA_ZONE_NOFREE,
210 IPI_HASHFIELDS_NONE);
211 EVENTHANDLER_REGISTER(maxsockets_change, rip_zone_change, NULL,
212 EVENTHANDLER_PRI_ANY);
220 in_pcbinfo_destroy(&V_ripcbinfo);
226 rip_append(struct inpcb *last, struct ip *ip, struct mbuf *n,
227 struct sockaddr_in *ripsrc)
231 INP_LOCK_ASSERT(last);
234 /* check AH/ESP integrity. */
235 if (ipsec4_in_reject(n, last)) {
240 if (!policyfail && mac_inpcb_check_deliver(last, n) != 0)
243 /* Check the minimum TTL for socket. */
244 if (last->inp_ip_minttl && last->inp_ip_minttl > ip->ip_ttl)
247 struct mbuf *opts = NULL;
250 so = last->inp_socket;
251 if ((last->inp_flags & INP_CONTROLOPTS) ||
252 (so->so_options & (SO_TIMESTAMP | SO_BINTIME)))
253 ip_savecontrol(last, &opts, ip, n);
254 SOCKBUF_LOCK(&so->so_rcv);
255 if (sbappendaddr_locked(&so->so_rcv,
256 (struct sockaddr *)ripsrc, n, opts) == 0) {
257 /* should notify about lost packet */
261 SOCKBUF_UNLOCK(&so->so_rcv);
263 sorwakeup_locked(so);
270 * Setup generic address and protocol structures for raw_input routine, then
271 * pass them along with mbuf chain.
274 rip_input(struct mbuf *m, int off)
277 struct ip *ip = mtod(m, struct ip *);
278 int proto = ip->ip_p;
279 struct inpcb *inp, *last;
280 struct sockaddr_in ripsrc;
283 bzero(&ripsrc, sizeof(ripsrc));
284 ripsrc.sin_len = sizeof(ripsrc);
285 ripsrc.sin_family = AF_INET;
286 ripsrc.sin_addr = ip->ip_src;
289 ifp = m->m_pkthdr.rcvif;
291 * Applications on raw sockets expect host byte order.
293 ip->ip_len = ntohs(ip->ip_len);
294 ip->ip_off = ntohs(ip->ip_off);
296 hash = INP_PCBHASH_RAW(proto, ip->ip_src.s_addr,
297 ip->ip_dst.s_addr, V_ripcbinfo.ipi_hashmask);
298 INP_INFO_RLOCK(&V_ripcbinfo);
299 LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[hash], inp_hash) {
300 if (inp->inp_ip_p != proto)
303 /* XXX inp locking */
304 if ((inp->inp_vflag & INP_IPV4) == 0)
307 if (inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
309 if (inp->inp_faddr.s_addr != ip->ip_src.s_addr)
311 if (jailed_without_vnet(inp->inp_cred)) {
313 * XXX: If faddr was bound to multicast group,
314 * jailed raw socket will drop datagram.
316 if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
322 n = m_copy(m, 0, (int)M_COPYALL);
324 (void) rip_append(last, ip, n, &ripsrc);
325 /* XXX count dropped packet */
331 LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[0], inp_hash) {
332 if (inp->inp_ip_p && inp->inp_ip_p != proto)
335 /* XXX inp locking */
336 if ((inp->inp_vflag & INP_IPV4) == 0)
339 if (!in_nullhost(inp->inp_laddr) &&
340 !in_hosteq(inp->inp_laddr, ip->ip_dst))
342 if (!in_nullhost(inp->inp_faddr) &&
343 !in_hosteq(inp->inp_faddr, ip->ip_src))
345 if (jailed_without_vnet(inp->inp_cred)) {
347 * Allow raw socket in jail to receive multicast;
348 * assume process had PRIV_NETINET_RAW at attach,
349 * and fall through into normal filter path if so.
351 if (!IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
352 prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
356 * If this raw socket has multicast state, and we
357 * have received a multicast, check if this socket
358 * should receive it, as multicast filtering is now
359 * the responsibility of the transport layer.
361 if (inp->inp_moptions != NULL &&
362 IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
364 * If the incoming datagram is for IGMP, allow it
365 * through unconditionally to the raw socket.
367 * In the case of IGMPv2, we may not have explicitly
368 * joined the group, and may have set IFF_ALLMULTI
369 * on the interface. imo_multi_filter() may discard
370 * control traffic we actually need to see.
372 * Userland multicast routing daemons should continue
373 * filter the control traffic appropriately.
377 blocked = MCAST_PASS;
378 if (proto != IPPROTO_IGMP) {
379 struct sockaddr_in group;
381 bzero(&group, sizeof(struct sockaddr_in));
382 group.sin_len = sizeof(struct sockaddr_in);
383 group.sin_family = AF_INET;
384 group.sin_addr = ip->ip_dst;
386 blocked = imo_multi_filter(inp->inp_moptions,
388 (struct sockaddr *)&group,
389 (struct sockaddr *)&ripsrc);
392 if (blocked != MCAST_PASS) {
393 IPSTAT_INC(ips_notmember);
400 n = m_copy(m, 0, (int)M_COPYALL);
402 (void) rip_append(last, ip, n, &ripsrc);
403 /* XXX count dropped packet */
409 INP_INFO_RUNLOCK(&V_ripcbinfo);
411 if (rip_append(last, ip, m, &ripsrc) != 0)
412 IPSTAT_INC(ips_delivered);
416 IPSTAT_INC(ips_noproto);
417 IPSTAT_DEC(ips_delivered);
422 * Generate IP header and pass packet to ip_output. Tack on options user may
423 * have setup with control call.
426 rip_output(struct mbuf *m, struct socket *so, u_long dst)
430 struct inpcb *inp = sotoinpcb(so);
431 int flags = ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0) |
435 * If the user handed us a complete IP packet, use it. Otherwise,
436 * allocate an mbuf for a header and fill it in.
438 if ((inp->inp_flags & INP_HDRINCL) == 0) {
439 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
443 M_PREPEND(m, sizeof(struct ip), M_NOWAIT);
448 ip = mtod(m, struct ip *);
449 ip->ip_tos = inp->inp_ip_tos;
450 if (inp->inp_flags & INP_DONTFRAG)
451 ip->ip_off = htons(IP_DF);
453 ip->ip_off = htons(0);
454 ip->ip_p = inp->inp_ip_p;
455 ip->ip_len = htons(m->m_pkthdr.len);
456 ip->ip_src = inp->inp_laddr;
457 if (jailed(inp->inp_cred)) {
459 * prison_local_ip4() would be good enough but would
460 * let a source of INADDR_ANY pass, which we do not
461 * want to see from jails. We do not go through the
462 * pain of in_pcbladdr() for raw sockets.
464 if (ip->ip_src.s_addr == INADDR_ANY)
465 error = prison_get_ip4(inp->inp_cred,
468 error = prison_local_ip4(inp->inp_cred,
476 ip->ip_dst.s_addr = dst;
477 ip->ip_ttl = inp->inp_ip_ttl;
479 if (m->m_pkthdr.len > IP_MAXPACKET) {
484 ip = mtod(m, struct ip *);
485 error = prison_check_ip4(inp->inp_cred, &ip->ip_src);
493 * Don't allow both user specified and setsockopt options,
494 * and don't allow packet length sizes that will crash.
496 if (((ip->ip_hl != (sizeof (*ip) >> 2)) && inp->inp_options)
497 || (ip->ip_len > m->m_pkthdr.len)
498 || (ip->ip_len < (ip->ip_hl << 2))) {
504 ip->ip_id = ip_newid();
507 * Applications on raw sockets pass us packets
508 * in host byte order.
510 ip->ip_len = htons(ip->ip_len);
511 ip->ip_off = htons(ip->ip_off);
514 * XXX prevent ip_output from overwriting header fields.
516 flags |= IP_RAWOUTPUT;
517 IPSTAT_INC(ips_rawout);
520 if (inp->inp_flags & INP_ONESBCAST)
521 flags |= IP_SENDONES;
524 mac_inpcb_create_mbuf(inp, m);
527 error = ip_output(m, inp->inp_options, NULL, flags,
528 inp->inp_moptions, inp);
534 * Raw IP socket option processing.
536 * IMPORTANT NOTE regarding access control: Traditionally, raw sockets could
537 * only be created by a privileged process, and as such, socket option
538 * operations to manage system properties on any raw socket were allowed to
539 * take place without explicit additional access control checks. However,
540 * raw sockets can now also be created in jail(), and therefore explicit
541 * checks are now required. Likewise, raw sockets can be used by a process
542 * after it gives up privilege, so some caution is required. For options
543 * passed down to the IP layer via ip_ctloutput(), checks are assumed to be
544 * performed in ip_ctloutput() and therefore no check occurs here.
545 * Unilaterally checking priv_check() here breaks normal IP socket option
546 * operations on raw sockets.
548 * When adding new socket options here, make sure to add access control
549 * checks here as necessary.
551 * XXX-BZ inp locking?
554 rip_ctloutput(struct socket *so, struct sockopt *sopt)
556 struct inpcb *inp = sotoinpcb(so);
559 if (sopt->sopt_level != IPPROTO_IP) {
560 if ((sopt->sopt_level == SOL_SOCKET) &&
561 (sopt->sopt_name == SO_SETFIB)) {
562 inp->inp_inc.inc_fibnum = so->so_fibnum;
569 switch (sopt->sopt_dir) {
571 switch (sopt->sopt_name) {
573 optval = inp->inp_flags & INP_HDRINCL;
574 error = sooptcopyout(sopt, &optval, sizeof optval);
577 case IP_FW3: /* generic ipfw v.3 functions */
578 case IP_FW_ADD: /* ADD actually returns the body... */
580 case IP_FW_TABLE_GETSIZE:
581 case IP_FW_TABLE_LIST:
582 case IP_FW_NAT_GET_CONFIG:
583 case IP_FW_NAT_GET_LOG:
584 if (V_ip_fw_ctl_ptr != NULL)
585 error = V_ip_fw_ctl_ptr(sopt);
590 case IP_DUMMYNET3: /* generic dummynet v.3 functions */
591 case IP_DUMMYNET_GET:
592 if (ip_dn_ctl_ptr != NULL)
593 error = ip_dn_ctl_ptr(sopt);
606 case MRT_API_SUPPORT:
608 case MRT_ADD_BW_UPCALL:
609 case MRT_DEL_BW_UPCALL:
610 error = priv_check(curthread, PRIV_NETINET_MROUTE);
613 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
618 error = ip_ctloutput(so, sopt);
624 switch (sopt->sopt_name) {
626 error = sooptcopyin(sopt, &optval, sizeof optval,
631 inp->inp_flags |= INP_HDRINCL;
633 inp->inp_flags &= ~INP_HDRINCL;
636 case IP_FW3: /* generic ipfw v.3 functions */
642 case IP_FW_TABLE_ADD:
643 case IP_FW_TABLE_DEL:
644 case IP_FW_TABLE_FLUSH:
647 if (V_ip_fw_ctl_ptr != NULL)
648 error = V_ip_fw_ctl_ptr(sopt);
653 case IP_DUMMYNET3: /* generic dummynet v.3 functions */
654 case IP_DUMMYNET_CONFIGURE:
655 case IP_DUMMYNET_DEL:
656 case IP_DUMMYNET_FLUSH:
657 if (ip_dn_ctl_ptr != NULL)
658 error = ip_dn_ctl_ptr(sopt);
660 error = ENOPROTOOPT ;
664 error = priv_check(curthread, PRIV_NETINET_MROUTE);
667 error = ip_rsvp_init(so);
671 error = priv_check(curthread, PRIV_NETINET_MROUTE);
674 error = ip_rsvp_done();
678 case IP_RSVP_VIF_OFF:
679 error = priv_check(curthread, PRIV_NETINET_MROUTE);
682 error = ip_rsvp_vif ?
683 ip_rsvp_vif(so, sopt) : EINVAL;
694 case MRT_API_SUPPORT:
696 case MRT_ADD_BW_UPCALL:
697 case MRT_DEL_BW_UPCALL:
698 error = priv_check(curthread, PRIV_NETINET_MROUTE);
701 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
706 error = ip_ctloutput(so, sopt);
716 * This function exists solely to receive the PRC_IFDOWN messages which are
717 * sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, and calls
718 * in_ifadown() to remove all routes corresponding to that address. It also
719 * receives the PRC_IFUP messages from if_up() and reinstalls the interface
723 rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
725 struct in_ifaddr *ia;
733 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
734 if (ia->ia_ifa.ifa_addr == sa
735 && (ia->ia_flags & IFA_ROUTE)) {
736 ifa_ref(&ia->ia_ifa);
739 * in_scrubprefix() kills the interface route.
741 in_scrubprefix(ia, 0);
743 * in_ifadown gets rid of all the rest of the
744 * routes. This is not quite the right thing
745 * to do, but at least if we are running a
746 * routing process they will come back.
748 in_ifadown(&ia->ia_ifa, 0);
749 ifa_free(&ia->ia_ifa);
753 if (ia == NULL) /* If ia matched, already unlocked. */
759 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
760 if (ia->ia_ifa.ifa_addr == sa)
763 if (ia == NULL || (ia->ia_flags & IFA_ROUTE)) {
767 ifa_ref(&ia->ia_ifa);
770 ifp = ia->ia_ifa.ifa_ifp;
772 if ((ifp->if_flags & IFF_LOOPBACK)
773 || (ifp->if_flags & IFF_POINTOPOINT))
776 err = ifa_del_loopback_route((struct ifaddr *)ia, sa);
778 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
780 ia->ia_flags |= IFA_ROUTE;
782 err = ifa_add_loopback_route((struct ifaddr *)ia, sa);
784 ifa_free(&ia->ia_ifa);
790 rip_attach(struct socket *so, int proto, struct thread *td)
796 KASSERT(inp == NULL, ("rip_attach: inp != NULL"));
798 error = priv_check(td, PRIV_NETINET_RAW);
801 if (proto >= IPPROTO_MAX || proto < 0)
802 return EPROTONOSUPPORT;
803 error = soreserve(so, rip_sendspace, rip_recvspace);
806 INP_INFO_WLOCK(&V_ripcbinfo);
807 error = in_pcballoc(so, &V_ripcbinfo);
809 INP_INFO_WUNLOCK(&V_ripcbinfo);
812 inp = (struct inpcb *)so->so_pcb;
813 inp->inp_vflag |= INP_IPV4;
814 inp->inp_ip_p = proto;
815 inp->inp_ip_ttl = V_ip_defttl;
817 INP_INFO_WUNLOCK(&V_ripcbinfo);
823 rip_detach(struct socket *so)
828 KASSERT(inp != NULL, ("rip_detach: inp == NULL"));
829 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
830 ("rip_detach: not closed"));
832 INP_INFO_WLOCK(&V_ripcbinfo);
835 if (so == V_ip_mrouter && ip_mrouter_done)
837 if (ip_rsvp_force_done)
838 ip_rsvp_force_done(so);
839 if (so == V_ip_rsvpd)
843 INP_INFO_WUNLOCK(&V_ripcbinfo);
847 rip_dodisconnect(struct socket *so, struct inpcb *inp)
849 struct inpcbinfo *pcbinfo;
851 pcbinfo = inp->inp_pcbinfo;
852 INP_INFO_WLOCK(pcbinfo);
855 inp->inp_faddr.s_addr = INADDR_ANY;
858 so->so_state &= ~SS_ISCONNECTED;
861 INP_INFO_WUNLOCK(pcbinfo);
865 rip_abort(struct socket *so)
870 KASSERT(inp != NULL, ("rip_abort: inp == NULL"));
872 rip_dodisconnect(so, inp);
876 rip_close(struct socket *so)
881 KASSERT(inp != NULL, ("rip_close: inp == NULL"));
883 rip_dodisconnect(so, inp);
887 rip_disconnect(struct socket *so)
891 if ((so->so_state & SS_ISCONNECTED) == 0)
895 KASSERT(inp != NULL, ("rip_disconnect: inp == NULL"));
897 rip_dodisconnect(so, inp);
902 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
904 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
908 if (nam->sa_len != sizeof(*addr))
911 error = prison_check_ip4(td->td_ucred, &addr->sin_addr);
916 KASSERT(inp != NULL, ("rip_bind: inp == NULL"));
918 if (TAILQ_EMPTY(&V_ifnet) ||
919 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) ||
920 (addr->sin_addr.s_addr &&
921 (inp->inp_flags & INP_BINDANY) == 0 &&
922 ifa_ifwithaddr_check((struct sockaddr *)addr) == 0))
923 return (EADDRNOTAVAIL);
925 INP_INFO_WLOCK(&V_ripcbinfo);
928 inp->inp_laddr = addr->sin_addr;
931 INP_INFO_WUNLOCK(&V_ripcbinfo);
936 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
938 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
941 if (nam->sa_len != sizeof(*addr))
943 if (TAILQ_EMPTY(&V_ifnet))
944 return (EADDRNOTAVAIL);
945 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK)
946 return (EAFNOSUPPORT);
949 KASSERT(inp != NULL, ("rip_connect: inp == NULL"));
951 INP_INFO_WLOCK(&V_ripcbinfo);
954 inp->inp_faddr = addr->sin_addr;
958 INP_INFO_WUNLOCK(&V_ripcbinfo);
963 rip_shutdown(struct socket *so)
968 KASSERT(inp != NULL, ("rip_shutdown: inp == NULL"));
977 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
978 struct mbuf *control, struct thread *td)
984 KASSERT(inp != NULL, ("rip_send: inp == NULL"));
987 * Note: 'dst' reads below are unlocked.
989 if (so->so_state & SS_ISCONNECTED) {
994 dst = inp->inp_faddr.s_addr; /* Unlocked read. */
1000 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
1002 return (rip_output(m, so, dst));
1007 rip_pcblist(SYSCTL_HANDLER_ARGS)
1010 struct inpcb *inp, **inp_list;
1015 * The process of preparing the TCB list is too time-consuming and
1016 * resource-intensive to repeat twice on every request.
1018 if (req->oldptr == 0) {
1019 n = V_ripcbinfo.ipi_count;
1020 n += imax(n / 8, 10);
1021 req->oldidx = 2 * (sizeof xig) + n * sizeof(struct xinpcb);
1025 if (req->newptr != 0)
1029 * OK, now we're committed to doing something.
1031 INP_INFO_RLOCK(&V_ripcbinfo);
1032 gencnt = V_ripcbinfo.ipi_gencnt;
1033 n = V_ripcbinfo.ipi_count;
1034 INP_INFO_RUNLOCK(&V_ripcbinfo);
1036 xig.xig_len = sizeof xig;
1038 xig.xig_gen = gencnt;
1039 xig.xig_sogen = so_gencnt;
1040 error = SYSCTL_OUT(req, &xig, sizeof xig);
1044 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
1048 INP_INFO_RLOCK(&V_ripcbinfo);
1049 for (inp = LIST_FIRST(V_ripcbinfo.ipi_listhead), i = 0; inp && i < n;
1050 inp = LIST_NEXT(inp, inp_list)) {
1052 if (inp->inp_gencnt <= gencnt &&
1053 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
1055 inp_list[i++] = inp;
1059 INP_INFO_RUNLOCK(&V_ripcbinfo);
1063 for (i = 0; i < n; i++) {
1066 if (inp->inp_gencnt <= gencnt) {
1069 bzero(&xi, sizeof(xi));
1070 xi.xi_len = sizeof xi;
1071 /* XXX should avoid extra copy */
1072 bcopy(inp, &xi.xi_inp, sizeof *inp);
1073 if (inp->inp_socket)
1074 sotoxsocket(inp->inp_socket, &xi.xi_socket);
1076 error = SYSCTL_OUT(req, &xi, sizeof xi);
1080 INP_INFO_WLOCK(&V_ripcbinfo);
1081 for (i = 0; i < n; i++) {
1084 if (!in_pcbrele_rlocked(inp))
1087 INP_INFO_WUNLOCK(&V_ripcbinfo);
1091 * Give the user an updated idea of our state. If the
1092 * generation differs from what we told her before, she knows
1093 * that something happened while we were processing this
1094 * request, and it might be necessary to retry.
1096 INP_INFO_RLOCK(&V_ripcbinfo);
1097 xig.xig_gen = V_ripcbinfo.ipi_gencnt;
1098 xig.xig_sogen = so_gencnt;
1099 xig.xig_count = V_ripcbinfo.ipi_count;
1100 INP_INFO_RUNLOCK(&V_ripcbinfo);
1101 error = SYSCTL_OUT(req, &xig, sizeof xig);
1103 free(inp_list, M_TEMP);
1107 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist,
1108 CTLTYPE_OPAQUE | CTLFLAG_RD, NULL, 0,
1109 rip_pcblist, "S,xinpcb", "List of active raw IP sockets");
1112 struct pr_usrreqs rip_usrreqs = {
1113 .pru_abort = rip_abort,
1114 .pru_attach = rip_attach,
1115 .pru_bind = rip_bind,
1116 .pru_connect = rip_connect,
1117 .pru_control = in_control,
1118 .pru_detach = rip_detach,
1119 .pru_disconnect = rip_disconnect,
1120 .pru_peeraddr = in_getpeeraddr,
1121 .pru_send = rip_send,
1122 .pru_shutdown = rip_shutdown,
1123 .pru_sockaddr = in_getsockaddr,
1124 .pru_sosetlabel = in_pcbsosetlabel,
1125 .pru_close = rip_close,