FreeBSD/Linux Kernel Cross Reference
sys/netinet/raw_ip.c
1 /*-
2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University 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.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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
27 * SUCH DAMAGE.
28 *
29 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
30 * $FreeBSD$
31 */
32
33 #include "opt_inet6.h"
34 #include "opt_ipsec.h"
35 #include "opt_mac.h"
36
37 #include <sys/param.h>
38 #include <sys/jail.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/mac.h>
42 #include <sys/malloc.h>
43 #include <sys/mbuf.h>
44 #include <sys/proc.h>
45 #include <sys/protosw.h>
46 #include <sys/signalvar.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/sx.h>
50 #include <sys/sysctl.h>
51 #include <sys/systm.h>
52
53 #include <vm/uma.h>
54
55 #include <net/if.h>
56 #include <net/route.h>
57
58 #include <netinet/in.h>
59 #include <netinet/in_systm.h>
60 #include <netinet/in_pcb.h>
61 #include <netinet/in_var.h>
62 #include <netinet/ip.h>
63 #include <netinet/ip_var.h>
64 #include <netinet/ip_mroute.h>
65
66 #include <netinet/ip_fw.h>
67 #include <netinet/ip_dummynet.h>
68
69 #ifdef FAST_IPSEC
70 #include <netipsec/ipsec.h>
71 #endif /*FAST_IPSEC*/
72
73 #ifdef IPSEC
74 #include <netinet6/ipsec.h>
75 #endif /*IPSEC*/
76
77 struct inpcbhead ripcb;
78 struct inpcbinfo ripcbinfo;
79
80 /* control hooks for ipfw and dummynet */
81 ip_fw_ctl_t *ip_fw_ctl_ptr = NULL;
82 ip_dn_ctl_t *ip_dn_ctl_ptr = NULL;
83
84 /*
85 * hooks for multicast routing. They all default to NULL,
86 * so leave them not initialized and rely on BSS being set to 0.
87 */
88
89 /* The socket used to communicate with the multicast routing daemon. */
90 struct socket *ip_mrouter;
91
92 /* The various mrouter and rsvp functions */
93 int (*ip_mrouter_set)(struct socket *, struct sockopt *);
94 int (*ip_mrouter_get)(struct socket *, struct sockopt *);
95 int (*ip_mrouter_done)(void);
96 int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
97 struct ip_moptions *);
98 int (*mrt_ioctl)(int, caddr_t);
99 int (*legal_vif_num)(int);
100 u_long (*ip_mcast_src)(int);
101
102 void (*rsvp_input_p)(struct mbuf *m, int off);
103 int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
104 void (*ip_rsvp_force_done)(struct socket *);
105
106 /*
107 * Nominal space allocated to a raw ip socket.
108 */
109 #define RIPSNDQ 8192
110 #define RIPRCVQ 8192
111
112 /*
113 * Raw interface to IP protocol.
114 */
115
116 /*
117 * Initialize raw connection block q.
118 */
119 void
120 rip_init()
121 {
122 INP_INFO_LOCK_INIT(&ripcbinfo, "rip");
123 LIST_INIT(&ripcb);
124 ripcbinfo.listhead = &ripcb;
125 /*
126 * XXX We don't use the hash list for raw IP, but it's easier
127 * to allocate a one entry hash list than it is to check all
128 * over the place for hashbase == NULL.
129 */
130 ripcbinfo.hashbase = hashinit(1, M_PCB, &ripcbinfo.hashmask);
131 ripcbinfo.porthashbase = hashinit(1, M_PCB, &ripcbinfo.porthashmask);
132 ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb),
133 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
134 uma_zone_set_max(ripcbinfo.ipi_zone, maxsockets);
135 }
136
137 static struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
138
139 static int
140 raw_append(struct inpcb *last, struct ip *ip, struct mbuf *n)
141 {
142 int policyfail = 0;
143
144 INP_LOCK_ASSERT(last);
145
146 #if defined(IPSEC) || defined(FAST_IPSEC)
147 /* check AH/ESP integrity. */
148 if (ipsec4_in_reject(n, last)) {
149 policyfail = 1;
150 #ifdef IPSEC
151 ipsecstat.in_polvio++;
152 #endif /*IPSEC*/
153 /* do not inject data to pcb */
154 }
155 #endif /*IPSEC || FAST_IPSEC*/
156 #ifdef MAC
157 if (!policyfail && mac_check_inpcb_deliver(last, n) != 0)
158 policyfail = 1;
159 #endif
160 if (!policyfail) {
161 struct mbuf *opts = NULL;
162 struct socket *so;
163
164 so = last->inp_socket;
165 if ((last->inp_flags & INP_CONTROLOPTS) ||
166 (so->so_options & SO_TIMESTAMP))
167 ip_savecontrol(last, &opts, ip, n);
168 SOCKBUF_LOCK(&so->so_rcv);
169 if (sbappendaddr_locked(&so->so_rcv,
170 (struct sockaddr *)&ripsrc, n, opts) == 0) {
171 /* should notify about lost packet */
172 m_freem(n);
173 if (opts)
174 m_freem(opts);
175 SOCKBUF_UNLOCK(&so->so_rcv);
176 } else
177 sorwakeup_locked(so);
178 } else
179 m_freem(n);
180 return policyfail;
181 }
182
183 /*
184 * Setup generic address and protocol structures
185 * for raw_input routine, then pass them along with
186 * mbuf chain.
187 */
188 void
189 rip_input(struct mbuf *m, int off)
190 {
191 struct ip *ip = mtod(m, struct ip *);
192 int proto = ip->ip_p;
193 struct inpcb *inp, *last;
194
195 INP_INFO_RLOCK(&ripcbinfo);
196 ripsrc.sin_addr = ip->ip_src;
197 last = NULL;
198 LIST_FOREACH(inp, &ripcb, inp_list) {
199 INP_LOCK(inp);
200 if (inp->inp_ip_p && inp->inp_ip_p != proto) {
201 docontinue:
202 INP_UNLOCK(inp);
203 continue;
204 }
205 #ifdef INET6
206 if ((inp->inp_vflag & INP_IPV4) == 0)
207 goto docontinue;
208 #endif
209 if (inp->inp_laddr.s_addr &&
210 inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
211 goto docontinue;
212 if (inp->inp_faddr.s_addr &&
213 inp->inp_faddr.s_addr != ip->ip_src.s_addr)
214 goto docontinue;
215 if (jailed(inp->inp_socket->so_cred))
216 if (htonl(prison_getip(inp->inp_socket->so_cred)) !=
217 ip->ip_dst.s_addr)
218 goto docontinue;
219 if (last) {
220 struct mbuf *n;
221
222 n = m_copy(m, 0, (int)M_COPYALL);
223 if (n != NULL)
224 (void) raw_append(last, ip, n);
225 /* XXX count dropped packet */
226 INP_UNLOCK(last);
227 }
228 last = inp;
229 }
230 if (last != NULL) {
231 if (raw_append(last, ip, m) != 0)
232 ipstat.ips_delivered--;
233 INP_UNLOCK(last);
234 } else {
235 m_freem(m);
236 ipstat.ips_noproto++;
237 ipstat.ips_delivered--;
238 }
239 INP_INFO_RUNLOCK(&ripcbinfo);
240 }
241
242 /*
243 * Generate IP header and pass packet to ip_output.
244 * Tack on options user may have setup with control call.
245 */
246 int
247 rip_output(struct mbuf *m, struct socket *so, u_long dst)
248 {
249 struct ip *ip;
250 int error;
251 struct inpcb *inp = sotoinpcb(so);
252 int flags = ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0) |
253 IP_ALLOWBROADCAST;
254
255 /*
256 * If the user handed us a complete IP packet, use it.
257 * Otherwise, allocate an mbuf for a header and fill it in.
258 */
259 if ((inp->inp_flags & INP_HDRINCL) == 0) {
260 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
261 m_freem(m);
262 return(EMSGSIZE);
263 }
264 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
265 if (m == NULL)
266 return(ENOBUFS);
267
268 INP_LOCK(inp);
269 ip = mtod(m, struct ip *);
270 ip->ip_tos = inp->inp_ip_tos;
271 ip->ip_off = 0;
272 ip->ip_p = inp->inp_ip_p;
273 ip->ip_len = m->m_pkthdr.len;
274 if (jailed(inp->inp_socket->so_cred))
275 ip->ip_src.s_addr =
276 htonl(prison_getip(inp->inp_socket->so_cred));
277 else
278 ip->ip_src = inp->inp_laddr;
279 ip->ip_dst.s_addr = dst;
280 ip->ip_ttl = inp->inp_ip_ttl;
281 } else {
282 if (m->m_pkthdr.len > IP_MAXPACKET) {
283 m_freem(m);
284 return(EMSGSIZE);
285 }
286 INP_LOCK(inp);
287 ip = mtod(m, struct ip *);
288 if (jailed(inp->inp_socket->so_cred)) {
289 if (ip->ip_src.s_addr !=
290 htonl(prison_getip(inp->inp_socket->so_cred))) {
291 INP_UNLOCK(inp);
292 m_freem(m);
293 return (EPERM);
294 }
295 }
296 /* don't allow both user specified and setsockopt options,
297 and don't allow packet length sizes that will crash */
298 if (((ip->ip_hl != (sizeof (*ip) >> 2))
299 && inp->inp_options)
300 || (ip->ip_len > m->m_pkthdr.len)
301 || (ip->ip_len < (ip->ip_hl << 2))) {
302 INP_UNLOCK(inp);
303 m_freem(m);
304 return EINVAL;
305 }
306 if (ip->ip_id == 0)
307 ip->ip_id = ip_newid();
308 /* XXX prevent ip_output from overwriting header fields */
309 flags |= IP_RAWOUTPUT;
310 ipstat.ips_rawout++;
311 }
312
313 if (inp->inp_flags & INP_ONESBCAST)
314 flags |= IP_SENDONES;
315
316 #ifdef MAC
317 mac_create_mbuf_from_inpcb(inp, m);
318 #endif
319
320 error = ip_output(m, inp->inp_options, NULL, flags,
321 inp->inp_moptions, inp);
322 INP_UNLOCK(inp);
323 return error;
324 }
325
326 /*
327 * Raw IP socket option processing.
328 *
329 * IMPORTANT NOTE regarding access control: Traditionally, raw sockets could
330 * only be created by a privileged process, and as such, socket option
331 * operations to manage system properties on any raw socket were allowed to
332 * take place without explicit additional access control checks. However,
333 * raw sockets can now also be created in jail(), and therefore explicit
334 * checks are now required. Likewise, raw sockets can be used by a process
335 * after it gives up privilege, so some caution is required. For options
336 * passed down to the IP layer via ip_ctloutput(), checks are assumed to be
337 * performed in ip_ctloutput() and therefore no check occurs here.
338 * Unilaterally checking suser() here breaks normal IP socket option
339 * operations on raw sockets.
340 *
341 * When adding new socket options here, make sure to add access control
342 * checks here as necessary.
343 */
344 int
345 rip_ctloutput(struct socket *so, struct sockopt *sopt)
346 {
347 struct inpcb *inp = sotoinpcb(so);
348 int error, optval;
349
350 if (sopt->sopt_level != IPPROTO_IP)
351 return (EINVAL);
352
353 error = 0;
354 switch (sopt->sopt_dir) {
355 case SOPT_GET:
356 switch (sopt->sopt_name) {
357 case IP_HDRINCL:
358 optval = inp->inp_flags & INP_HDRINCL;
359 error = sooptcopyout(sopt, &optval, sizeof optval);
360 break;
361
362 case IP_FW_ADD: /* ADD actually returns the body... */
363 case IP_FW_GET:
364 case IP_FW_TABLE_GETSIZE:
365 case IP_FW_TABLE_LIST:
366 error = suser(curthread);
367 if (error != 0)
368 return (error);
369 if (ip_fw_ctl_ptr != NULL)
370 error = ip_fw_ctl_ptr(sopt);
371 else
372 error = ENOPROTOOPT;
373 break;
374
375 case IP_DUMMYNET_GET:
376 error = suser(curthread);
377 if (error != 0)
378 return (error);
379 if (ip_dn_ctl_ptr != NULL)
380 error = ip_dn_ctl_ptr(sopt);
381 else
382 error = ENOPROTOOPT;
383 break ;
384
385 case MRT_INIT:
386 case MRT_DONE:
387 case MRT_ADD_VIF:
388 case MRT_DEL_VIF:
389 case MRT_ADD_MFC:
390 case MRT_DEL_MFC:
391 case MRT_VERSION:
392 case MRT_ASSERT:
393 case MRT_API_SUPPORT:
394 case MRT_API_CONFIG:
395 case MRT_ADD_BW_UPCALL:
396 case MRT_DEL_BW_UPCALL:
397 error = suser(curthread);
398 if (error != 0)
399 return (error);
400 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
401 EOPNOTSUPP;
402 break;
403
404 default:
405 error = ip_ctloutput(so, sopt);
406 break;
407 }
408 break;
409
410 case SOPT_SET:
411 switch (sopt->sopt_name) {
412 case IP_HDRINCL:
413 error = sooptcopyin(sopt, &optval, sizeof optval,
414 sizeof optval);
415 if (error)
416 break;
417 if (optval)
418 inp->inp_flags |= INP_HDRINCL;
419 else
420 inp->inp_flags &= ~INP_HDRINCL;
421 break;
422
423 case IP_FW_ADD:
424 case IP_FW_DEL:
425 case IP_FW_FLUSH:
426 case IP_FW_ZERO:
427 case IP_FW_RESETLOG:
428 case IP_FW_TABLE_ADD:
429 case IP_FW_TABLE_DEL:
430 case IP_FW_TABLE_FLUSH:
431 error = suser(curthread);
432 if (error != 0)
433 return (error);
434 if (ip_fw_ctl_ptr != NULL)
435 error = ip_fw_ctl_ptr(sopt);
436 else
437 error = ENOPROTOOPT;
438 break;
439
440 case IP_DUMMYNET_CONFIGURE:
441 case IP_DUMMYNET_DEL:
442 case IP_DUMMYNET_FLUSH:
443 error = suser(curthread);
444 if (error != 0)
445 return (error);
446 if (ip_dn_ctl_ptr != NULL)
447 error = ip_dn_ctl_ptr(sopt);
448 else
449 error = ENOPROTOOPT ;
450 break ;
451
452 case IP_RSVP_ON:
453 error = suser(curthread);
454 if (error != 0)
455 return (error);
456 error = ip_rsvp_init(so);
457 break;
458
459 case IP_RSVP_OFF:
460 error = suser(curthread);
461 if (error != 0)
462 return (error);
463 error = ip_rsvp_done();
464 break;
465
466 case IP_RSVP_VIF_ON:
467 case IP_RSVP_VIF_OFF:
468 error = suser(curthread);
469 if (error != 0)
470 return (error);
471 error = ip_rsvp_vif ?
472 ip_rsvp_vif(so, sopt) : EINVAL;
473 break;
474
475 case MRT_INIT:
476 case MRT_DONE:
477 case MRT_ADD_VIF:
478 case MRT_DEL_VIF:
479 case MRT_ADD_MFC:
480 case MRT_DEL_MFC:
481 case MRT_VERSION:
482 case MRT_ASSERT:
483 case MRT_API_SUPPORT:
484 case MRT_API_CONFIG:
485 case MRT_ADD_BW_UPCALL:
486 case MRT_DEL_BW_UPCALL:
487 error = suser(curthread);
488 if (error != 0)
489 return (error);
490 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
491 EOPNOTSUPP;
492 break;
493
494 default:
495 error = ip_ctloutput(so, sopt);
496 break;
497 }
498 break;
499 }
500
501 return (error);
502 }
503
504 /*
505 * This function exists solely to receive the PRC_IFDOWN messages which
506 * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa,
507 * and calls in_ifadown() to remove all routes corresponding to that address.
508 * It also receives the PRC_IFUP messages from if_up() and reinstalls the
509 * interface routes.
510 */
511 void
512 rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
513 {
514 struct in_ifaddr *ia;
515 struct ifnet *ifp;
516 int err;
517 int flags;
518
519 switch (cmd) {
520 case PRC_IFDOWN:
521 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
522 if (ia->ia_ifa.ifa_addr == sa
523 && (ia->ia_flags & IFA_ROUTE)) {
524 /*
525 * in_ifscrub kills the interface route.
526 */
527 in_ifscrub(ia->ia_ifp, ia);
528 /*
529 * in_ifadown gets rid of all the rest of
530 * the routes. This is not quite the right
531 * thing to do, but at least if we are running
532 * a routing process they will come back.
533 */
534 in_ifadown(&ia->ia_ifa, 0);
535 break;
536 }
537 }
538 break;
539
540 case PRC_IFUP:
541 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
542 if (ia->ia_ifa.ifa_addr == sa)
543 break;
544 }
545 if (ia == 0 || (ia->ia_flags & IFA_ROUTE))
546 return;
547 flags = RTF_UP;
548 ifp = ia->ia_ifa.ifa_ifp;
549
550 if ((ifp->if_flags & IFF_LOOPBACK)
551 || (ifp->if_flags & IFF_POINTOPOINT))
552 flags |= RTF_HOST;
553
554 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
555 if (err == 0)
556 ia->ia_flags |= IFA_ROUTE;
557 break;
558 }
559 }
560
561 u_long rip_sendspace = RIPSNDQ;
562 u_long rip_recvspace = RIPRCVQ;
563
564 SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
565 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
566 SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
567 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams");
568
569 static int
570 rip_attach(struct socket *so, int proto, struct thread *td)
571 {
572 struct inpcb *inp;
573 int error;
574
575 /* XXX why not lower? */
576 INP_INFO_WLOCK(&ripcbinfo);
577 inp = sotoinpcb(so);
578 if (inp) {
579 /* XXX counter, printf */
580 INP_INFO_WUNLOCK(&ripcbinfo);
581 return EINVAL;
582 }
583 if (td && jailed(td->td_ucred) && !jail_allow_raw_sockets) {
584 INP_INFO_WUNLOCK(&ripcbinfo);
585 return (EPERM);
586 }
587 if (td && (error = suser_cred(td->td_ucred, SUSER_ALLOWJAIL)) != 0) {
588 INP_INFO_WUNLOCK(&ripcbinfo);
589 return error;
590 }
591 if (proto >= IPPROTO_MAX || proto < 0) {
592 INP_INFO_WUNLOCK(&ripcbinfo);
593 return EPROTONOSUPPORT;
594 }
595
596 error = soreserve(so, rip_sendspace, rip_recvspace);
597 if (error) {
598 INP_INFO_WUNLOCK(&ripcbinfo);
599 return error;
600 }
601 error = in_pcballoc(so, &ripcbinfo, "rawinp");
602 if (error) {
603 INP_INFO_WUNLOCK(&ripcbinfo);
604 return error;
605 }
606 inp = (struct inpcb *)so->so_pcb;
607 INP_LOCK(inp);
608 INP_INFO_WUNLOCK(&ripcbinfo);
609 inp->inp_vflag |= INP_IPV4;
610 inp->inp_ip_p = proto;
611 inp->inp_ip_ttl = ip_defttl;
612 INP_UNLOCK(inp);
613 return 0;
614 }
615
616 static void
617 rip_pcbdetach(struct socket *so, struct inpcb *inp)
618 {
619
620 INP_INFO_WLOCK_ASSERT(&ripcbinfo);
621 INP_LOCK_ASSERT(inp);
622
623 if (so == ip_mrouter && ip_mrouter_done)
624 ip_mrouter_done();
625 if (ip_rsvp_force_done)
626 ip_rsvp_force_done(so);
627 if (so == ip_rsvpd)
628 ip_rsvp_done();
629 in_pcbdetach(inp);
630 }
631
632 static int
633 rip_detach(struct socket *so)
634 {
635 struct inpcb *inp;
636
637 INP_INFO_WLOCK(&ripcbinfo);
638 inp = sotoinpcb(so);
639 if (inp == 0) {
640 /* XXX counter, printf */
641 INP_INFO_WUNLOCK(&ripcbinfo);
642 return EINVAL;
643 }
644 INP_LOCK(inp);
645 rip_pcbdetach(so, inp);
646 INP_INFO_WUNLOCK(&ripcbinfo);
647 return 0;
648 }
649
650 static int
651 rip_abort(struct socket *so)
652 {
653 struct inpcb *inp;
654
655 INP_INFO_WLOCK(&ripcbinfo);
656 inp = sotoinpcb(so);
657 if (inp == 0) {
658 INP_INFO_WUNLOCK(&ripcbinfo);
659 return EINVAL; /* ??? possible? panic instead? */
660 }
661 INP_LOCK(inp);
662 soisdisconnected(so);
663 if (so->so_state & SS_NOFDREF)
664 rip_pcbdetach(so, inp);
665 else
666 INP_UNLOCK(inp);
667 INP_INFO_WUNLOCK(&ripcbinfo);
668 return 0;
669 }
670
671 static int
672 rip_disconnect(struct socket *so)
673 {
674 if ((so->so_state & SS_ISCONNECTED) == 0)
675 return ENOTCONN;
676 return rip_abort(so);
677 }
678
679 static int
680 rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
681 {
682 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
683 struct inpcb *inp;
684
685 if (nam->sa_len != sizeof(*addr))
686 return EINVAL;
687
688 if (jailed(td->td_ucred)) {
689 if (addr->sin_addr.s_addr == INADDR_ANY)
690 addr->sin_addr.s_addr =
691 htonl(prison_getip(td->td_ucred));
692 if (htonl(prison_getip(td->td_ucred)) != addr->sin_addr.s_addr)
693 return (EADDRNOTAVAIL);
694 }
695
696 if (TAILQ_EMPTY(&ifnet) ||
697 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) ||
698 (addr->sin_addr.s_addr &&
699 ifa_ifwithaddr((struct sockaddr *)addr) == 0))
700 return EADDRNOTAVAIL;
701
702 INP_INFO_WLOCK(&ripcbinfo);
703 inp = sotoinpcb(so);
704 if (inp == 0) {
705 INP_INFO_WUNLOCK(&ripcbinfo);
706 return EINVAL;
707 }
708 INP_LOCK(inp);
709 inp->inp_laddr = addr->sin_addr;
710 INP_UNLOCK(inp);
711 INP_INFO_WUNLOCK(&ripcbinfo);
712 return 0;
713 }
714
715 static int
716 rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
717 {
718 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
719 struct inpcb *inp;
720
721 if (nam->sa_len != sizeof(*addr))
722 return EINVAL;
723 if (TAILQ_EMPTY(&ifnet))
724 return EADDRNOTAVAIL;
725 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK)
726 return EAFNOSUPPORT;
727
728 INP_INFO_WLOCK(&ripcbinfo);
729 inp = sotoinpcb(so);
730 if (inp == 0) {
731 INP_INFO_WUNLOCK(&ripcbinfo);
732 return EINVAL;
733 }
734 INP_LOCK(inp);
735 inp->inp_faddr = addr->sin_addr;
736 soisconnected(so);
737 INP_UNLOCK(inp);
738 INP_INFO_WUNLOCK(&ripcbinfo);
739 return 0;
740 }
741
742 static int
743 rip_shutdown(struct socket *so)
744 {
745 struct inpcb *inp;
746
747 INP_INFO_RLOCK(&ripcbinfo);
748 inp = sotoinpcb(so);
749 if (inp == 0) {
750 INP_INFO_RUNLOCK(&ripcbinfo);
751 return EINVAL;
752 }
753 INP_LOCK(inp);
754 INP_INFO_RUNLOCK(&ripcbinfo);
755 socantsendmore(so);
756 INP_UNLOCK(inp);
757 return 0;
758 }
759
760 static int
761 rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
762 struct mbuf *control, struct thread *td)
763 {
764 struct inpcb *inp;
765 u_long dst;
766 int ret;
767
768 INP_INFO_WLOCK(&ripcbinfo);
769 inp = sotoinpcb(so);
770 if (so->so_state & SS_ISCONNECTED) {
771 if (nam) {
772 INP_INFO_WUNLOCK(&ripcbinfo);
773 m_freem(m);
774 return EISCONN;
775 }
776 dst = inp->inp_faddr.s_addr;
777 } else {
778 if (nam == NULL) {
779 INP_INFO_WUNLOCK(&ripcbinfo);
780 m_freem(m);
781 return ENOTCONN;
782 }
783 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
784 }
785 ret = rip_output(m, so, dst);
786 INP_INFO_WUNLOCK(&ripcbinfo);
787 return ret;
788 }
789
790 static int
791 rip_pcblist(SYSCTL_HANDLER_ARGS)
792 {
793 int error, i, n;
794 struct inpcb *inp, **inp_list;
795 inp_gen_t gencnt;
796 struct xinpgen xig;
797
798 /*
799 * The process of preparing the TCB list is too time-consuming and
800 * resource-intensive to repeat twice on every request.
801 */
802 if (req->oldptr == 0) {
803 n = ripcbinfo.ipi_count;
804 req->oldidx = 2 * (sizeof xig)
805 + (n + n/8) * sizeof(struct xinpcb);
806 return 0;
807 }
808
809 if (req->newptr != 0)
810 return EPERM;
811
812 /*
813 * OK, now we're committed to doing something.
814 */
815 INP_INFO_RLOCK(&ripcbinfo);
816 gencnt = ripcbinfo.ipi_gencnt;
817 n = ripcbinfo.ipi_count;
818 INP_INFO_RUNLOCK(&ripcbinfo);
819
820 xig.xig_len = sizeof xig;
821 xig.xig_count = n;
822 xig.xig_gen = gencnt;
823 xig.xig_sogen = so_gencnt;
824 error = SYSCTL_OUT(req, &xig, sizeof xig);
825 if (error)
826 return error;
827
828 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
829 if (inp_list == 0)
830 return ENOMEM;
831
832 INP_INFO_RLOCK(&ripcbinfo);
833 for (inp = LIST_FIRST(ripcbinfo.listhead), i = 0; inp && i < n;
834 inp = LIST_NEXT(inp, inp_list)) {
835 INP_LOCK(inp);
836 if (inp->inp_gencnt <= gencnt &&
837 cr_canseesocket(req->td->td_ucred, inp->inp_socket) == 0) {
838 /* XXX held references? */
839 inp_list[i++] = inp;
840 }
841 INP_UNLOCK(inp);
842 }
843 INP_INFO_RUNLOCK(&ripcbinfo);
844 n = i;
845
846 error = 0;
847 for (i = 0; i < n; i++) {
848 inp = inp_list[i];
849 if (inp->inp_gencnt <= gencnt) {
850 struct xinpcb xi;
851 bzero(&xi, sizeof(xi));
852 xi.xi_len = sizeof xi;
853 /* XXX should avoid extra copy */
854 bcopy(inp, &xi.xi_inp, sizeof *inp);
855 if (inp->inp_socket)
856 sotoxsocket(inp->inp_socket, &xi.xi_socket);
857 error = SYSCTL_OUT(req, &xi, sizeof xi);
858 }
859 }
860 if (!error) {
861 /*
862 * Give the user an updated idea of our state.
863 * If the generation differs from what we told
864 * her before, she knows that something happened
865 * while we were processing this request, and it
866 * might be necessary to retry.
867 */
868 INP_INFO_RLOCK(&ripcbinfo);
869 xig.xig_gen = ripcbinfo.ipi_gencnt;
870 xig.xig_sogen = so_gencnt;
871 xig.xig_count = ripcbinfo.ipi_count;
872 INP_INFO_RUNLOCK(&ripcbinfo);
873 error = SYSCTL_OUT(req, &xig, sizeof xig);
874 }
875 free(inp_list, M_TEMP);
876 return error;
877 }
878
879 /*
880 * This is the wrapper function for in_setsockaddr. We just pass down
881 * the pcbinfo for in_setpeeraddr to lock.
882 */
883 static int
884 rip_sockaddr(struct socket *so, struct sockaddr **nam)
885 {
886 return (in_setsockaddr(so, nam, &ripcbinfo));
887 }
888
889 /*
890 * This is the wrapper function for in_setpeeraddr. We just pass down
891 * the pcbinfo for in_setpeeraddr to lock.
892 */
893 static int
894 rip_peeraddr(struct socket *so, struct sockaddr **nam)
895 {
896 return (in_setpeeraddr(so, nam, &ripcbinfo));
897 }
898
899
900 SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0,
901 rip_pcblist, "S,xinpcb", "List of active raw IP sockets");
902
903 struct pr_usrreqs rip_usrreqs = {
904 rip_abort, pru_accept_notsupp, rip_attach, rip_bind, rip_connect,
905 pru_connect2_notsupp, in_control, rip_detach, rip_disconnect,
906 pru_listen_notsupp, rip_peeraddr, pru_rcvd_notsupp,
907 pru_rcvoob_notsupp, rip_send, pru_sense_null, rip_shutdown,
908 rip_sockaddr, sosend, soreceive, sopoll, in_pcbsosetlabel
909 };
Cache object: 69e1e40a4e61f6a5b72ba2001298c0c9
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