1 /*
2 * Copyright (c) 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 *
7 * @(#)rtsock.c 8.6.1.1 (Berkeley) 02/23/95
8 */
9
10 #include <sys/param.h>
11 #include <sys/systm.h>
12 #include <sys/proc.h>
13 #include <sys/mbuf.h>
14 #include <sys/socket.h>
15 #include <sys/socketvar.h>
16 #include <sys/domain.h>
17 #include <sys/protosw.h>
18
19 #include <net/if.h>
20 #include <net/route.h>
21 #include <net/raw_cb.h>
22
23 struct sockaddr route_dst = { 2, PF_ROUTE, };
24 struct sockaddr route_src = { 2, PF_ROUTE, };
25 struct sockproto route_proto = { PF_ROUTE, };
26
27 struct walkarg {
28 int w_op, w_arg, w_given, w_needed, w_tmemsize;
29 caddr_t w_where, w_tmem;
30 };
31
32 static struct mbuf *
33 rt_msg1 __P((int, struct rt_addrinfo *));
34 static int rt_msg2 __P((int,
35 struct rt_addrinfo *, caddr_t, struct walkarg *));
36 void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *));
37 void m_copyback __P((struct mbuf *, int, int, caddr_t));
38
39 /* Sleazy use of local variables throughout file, warning!!!! */
40 #define dst info.rti_info[RTAX_DST]
41 #define gate info.rti_info[RTAX_GATEWAY]
42 #define netmask info.rti_info[RTAX_NETMASK]
43 #define genmask info.rti_info[RTAX_GENMASK]
44 #define ifpaddr info.rti_info[RTAX_IFP]
45 #define ifaaddr info.rti_info[RTAX_IFA]
46 #define brdaddr info.rti_info[RTAX_BRD]
47
48 /*ARGSUSED*/
49 int
route_usrreq(so,req,m,nam,control)50 route_usrreq(so, req, m, nam, control)
51 register struct socket *so;
52 int req;
53 struct mbuf *m, *nam, *control;
54 {
55 register int error = 0;
56 register struct rawcb *rp = sotorawcb(so);
57 int s;
58
59 if (req == PRU_ATTACH) {
60 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK);
61 if (so->so_pcb = (caddr_t)rp)
62 bzero(so->so_pcb, sizeof(*rp));
63
64 }
65 if (req == PRU_DETACH && rp) {
66 int af = rp->rcb_proto.sp_protocol;
67 if (af == AF_INET)
68 route_cb.ip_count--;
69 else if (af == AF_NS)
70 route_cb.ns_count--;
71 else if (af == AF_ISO)
72 route_cb.iso_count--;
73 route_cb.any_count--;
74 }
75 s = splnet();
76 error = raw_usrreq(so, req, m, nam, control);
77 rp = sotorawcb(so);
78 if (req == PRU_ATTACH && rp) {
79 int af = rp->rcb_proto.sp_protocol;
80 if (error) {
81 free((caddr_t)rp, M_PCB);
82 splx(s);
83 return (error);
84 }
85 if (af == AF_INET)
86 route_cb.ip_count++;
87 else if (af == AF_NS)
88 route_cb.ns_count++;
89 else if (af == AF_ISO)
90 route_cb.iso_count++;
91 rp->rcb_faddr = &route_src;
92 route_cb.any_count++;
93 soisconnected(so);
94 so->so_options |= SO_USELOOPBACK;
95 }
96 splx(s);
97 return (error);
98 }
99
100 /*ARGSUSED*/
101 int
route_output(m,so)102 route_output(m, so)
103 register struct mbuf *m;
104 struct socket *so;
105 {
106 register struct rt_msghdr *rtm = 0;
107 register struct rtentry *rt = 0;
108 struct rtentry *saved_nrt = 0;
109 struct radix_node_head *rnh;
110 struct rt_addrinfo info;
111 int len, error = 0;
112 struct ifnet *ifp = 0;
113 struct ifaddr *ifa = 0;
114
115 #define senderr(e) { error = e; goto flush;}
116 if (m == 0 || ((m->m_len < sizeof(long)) &&
117 (m = m_pullup(m, sizeof(long))) == 0))
118 return (ENOBUFS);
119 if ((m->m_flags & M_PKTHDR) == 0)
120 panic("route_output");
121 len = m->m_pkthdr.len;
122 if (len < sizeof(*rtm) ||
123 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
124 dst = 0;
125 senderr(EINVAL);
126 }
127 R_Malloc(rtm, struct rt_msghdr *, len);
128 if (rtm == 0) {
129 dst = 0;
130 senderr(ENOBUFS);
131 }
132 m_copydata(m, 0, len, (caddr_t)rtm);
133 if (rtm->rtm_version != RTM_VERSION) {
134 dst = 0;
135 senderr(EPROTONOSUPPORT);
136 }
137 rtm->rtm_pid = curproc->p_pid;
138 info.rti_addrs = rtm->rtm_addrs;
139 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info);
140 info.rti_flags = rtm->rtm_flags;
141 if (dst == 0)
142 senderr(EINVAL);
143 if (genmask) {
144 struct radix_node *t;
145 t = rn_addmask((caddr_t)genmask, 0, 1);
146 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
147 genmask = (struct sockaddr *)(t->rn_key);
148 else
149 senderr(ENOBUFS);
150 }
151 switch (rtm->rtm_type) {
152
153 case RTM_ADDPKT:
154 case RTM_ADD:
155 if (gate == 0)
156 senderr(EINVAL);
157 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt);
158 if (error == 0 && saved_nrt) {
159 rt_setmetrics(rtm->rtm_inits,
160 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
161 saved_nrt->rt_refcnt--;
162 saved_nrt->rt_genmask = genmask;
163 }
164 break;
165
166 case RTM_DELPKT:
167 case RTM_DELETE:
168 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt);
169 if (error == 0) {
170 (rt = saved_nrt)->rt_refcnt++;
171 goto report;
172 }
173 break;
174
175 case RTM_GET:
176 case RTM_CHANGE:
177 case RTM_LOCK:
178 if ((rnh = rt_tables[dst->sa_family]) == 0) {
179 senderr(EAFNOSUPPORT);
180 } else if (rt = (struct rtentry *)
181 rnh->rnh_lookup(dst, netmask, rnh))
182 rt->rt_refcnt++;
183 else
184 senderr(ESRCH);
185 switch(rtm->rtm_type) {
186
187 case RTM_GET:
188 report:
189 dst = rt_key(rt);
190 gate = rt->rt_gateway;
191 netmask = rt_mask(rt);
192 genmask = rt->rt_genmask;
193 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
194 if (ifp = rt->rt_ifp) {
195 ifpaddr = ifp->if_addrlist->ifa_addr;
196 ifaaddr = rt->rt_ifa->ifa_addr;
197 if (ifp->if_flags & IFF_POINTOPOINT)
198 brdaddr = rt->rt_ifa->ifa_dstaddr;
199 else
200 brdaddr = 0;
201 rtm->rtm_index = ifp->if_index;
202 } else {
203 ifpaddr = 0;
204 ifaaddr = 0;
205 }
206 }
207 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
208 (struct walkarg *)0);
209 if (len > rtm->rtm_msglen) {
210 struct rt_msghdr *new_rtm;
211 R_Malloc(new_rtm, struct rt_msghdr *, len);
212 if (new_rtm == 0)
213 senderr(ENOBUFS);
214 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
215 Free(rtm); rtm = new_rtm;
216 }
217 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
218 (struct walkarg *)0);
219 rtm->rtm_flags = rt->rt_flags;
220 rtm->rtm_rmx = rt->rt_rmx;
221 rtm->rtm_addrs = info.rti_addrs;
222 break;
223
224 case RTM_CHANGE:
225 /* new gateway could require new ifaddr, ifp;
226 flags may also be different; ifp may be specified
227 by ll sockaddr when protocol address is ambiguous */
228 if (error = rt_getifa(&info))
229 senderr(error);
230 if (gate && rt_setgate(rt, rt_key(rt), gate))
231 senderr(EDQUOT);
232 if (ifa = info.rti_ifa) {
233 register struct ifaddr *oifa = rt->rt_ifa;
234 if (oifa != ifa) {
235 if (oifa && oifa->ifa_rtrequest)
236 oifa->ifa_rtrequest(RTM_DELETE,
237 rt, &info);
238 IFAFREE(rt->rt_ifa);
239 rt->rt_ifa = ifa;
240 ifa->ifa_refcnt++;
241 rt->rt_ifp = info.rti_ifp;
242 }
243 }
244 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
245 &rt->rt_rmx);
246 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
247 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info);
248 if (genmask)
249 rt->rt_genmask = genmask;
250 /*
251 * Fall into
252 */
253 case RTM_LOCK:
254 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
255 rt->rt_rmx.rmx_locks |=
256 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
257 break;
258 }
259 break;
260
261 default:
262 senderr(EOPNOTSUPP);
263 }
264
265 flush:
266 if (rtm) {
267 if (error)
268 rtm->rtm_errno = error;
269 else
270 rtm->rtm_flags |= RTF_DONE;
271 }
272 if (rt)
273 rtfree(rt);
274 {
275 register struct rawcb *rp = 0;
276 /*
277 * Check to see if we don't want our own messages.
278 */
279 if ((so->so_options & SO_USELOOPBACK) == 0) {
280 if (route_cb.any_count <= 1) {
281 if (rtm)
282 Free(rtm);
283 m_freem(m);
284 return (error);
285 }
286 /* There is another listener, so construct message */
287 rp = sotorawcb(so);
288 }
289 if (rtm) {
290 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
291 Free(rtm);
292 }
293 if (rp)
294 rp->rcb_proto.sp_family = 0; /* Avoid us */
295 if (dst)
296 route_proto.sp_protocol = dst->sa_family;
297 raw_input(m, &route_proto, &route_src, &route_dst);
298 if (rp)
299 rp->rcb_proto.sp_family = PF_ROUTE;
300 }
301 return (error);
302 }
303
304 void
rt_setmetrics(which,in,out)305 rt_setmetrics(which, in, out)
306 u_long which;
307 register struct rt_metrics *in, *out;
308 {
309 #define metric(f, e) if (which & (f)) out->e = in->e;
310 metric(RTV_RPIPE, rmx_recvpipe);
311 metric(RTV_SPIPE, rmx_sendpipe);
312 metric(RTV_SSTHRESH, rmx_ssthresh);
313 metric(RTV_RTT, rmx_rtt);
314 metric(RTV_RTTVAR, rmx_rttvar);
315 metric(RTV_HOPCOUNT, rmx_hopcount);
316 metric(RTV_MTU, rmx_mtu);
317 metric(RTV_EXPIRE, rmx_expire);
318 #undef metric
319 }
320
321 #define ROUNDUP(a) \
322 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
323 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
324
325 void
rt_xaddrs(cp,cplim,rtinfo)326 rt_xaddrs(cp, cplim, rtinfo)
327 register caddr_t cp, cplim;
328 register struct rt_addrinfo *rtinfo;
329 {
330 register struct sockaddr *sa;
331 register int i, addrs = rtinfo->rti_addrs;
332
333 bzero(rtinfo, sizeof(*rtinfo));
334 rtinfo->rti_addrs = addrs;
335 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
336 if ((addrs & (1 << i)) == 0)
337 continue;
338 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
339 ADVANCE(cp, sa);
340 }
341 rtinfo->rti_pkthdr = cp;
342 }
343
344 /*
345 * Copy data from a buffer back into the indicated mbuf chain,
346 * starting "off" bytes from the beginning, extending the mbuf
347 * chain if necessary.
348 */
349 void
m_copyback(m0,off,len,cp)350 m_copyback(m0, off, len, cp)
351 struct mbuf *m0;
352 register int off;
353 register int len;
354 caddr_t cp;
355 {
356 register int mlen;
357 register struct mbuf *m = m0, *n;
358 int totlen = 0;
359
360 if (m0 == 0)
361 return;
362 while (off > (mlen = m->m_len)) {
363 off -= mlen;
364 totlen += mlen;
365 if (m->m_next == 0) {
366 n = m_getclr(M_DONTWAIT, m->m_type);
367 if (n == 0)
368 goto out;
369 n->m_len = min(MLEN, len + off);
370 m->m_next = n;
371 }
372 m = m->m_next;
373 }
374 while (len > 0) {
375 mlen = min (m->m_len - off, len);
376 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
377 cp += mlen;
378 len -= mlen;
379 mlen += off;
380 off = 0;
381 totlen += mlen;
382 if (len == 0)
383 break;
384 if (m->m_next == 0) {
385 n = m_get(M_DONTWAIT, m->m_type);
386 if (n == 0)
387 break;
388 n->m_len = min(MLEN, len);
389 m->m_next = n;
390 }
391 m = m->m_next;
392 }
393 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
394 m->m_pkthdr.len = totlen;
395 }
396
397 static struct mbuf *
rt_msg1(type,rtinfo)398 rt_msg1(type, rtinfo)
399 int type;
400 register struct rt_addrinfo *rtinfo;
401 {
402 register struct rt_msghdr *rtm;
403 register struct mbuf *m;
404 register int i;
405 register struct sockaddr *sa;
406 int len, dlen;
407
408 m = m_gethdr(M_DONTWAIT, MT_DATA);
409 if (m == 0)
410 return (m);
411 switch (type) {
412
413 case RTM_DELADDR:
414 case RTM_NEWADDR:
415 len = sizeof(struct ifa_msghdr);
416 break;
417
418 case RTM_IFINFO:
419 len = sizeof(struct if_msghdr);
420 break;
421
422 default:
423 len = sizeof(struct rt_msghdr);
424 }
425 if (len > MHLEN)
426 panic("rt_msg1");
427 m->m_pkthdr.len = m->m_len = len;
428 m->m_pkthdr.rcvif = 0;
429 rtm = mtod(m, struct rt_msghdr *);
430 bzero((caddr_t)rtm, len);
431 for (i = 0; i < RTAX_MAX; i++) {
432 if ((sa = rtinfo->rti_info[i]) == NULL)
433 continue;
434 rtinfo->rti_addrs |= (1 << i);
435 dlen = ROUNDUP(sa->sa_len);
436 m_copyback(m, len, dlen, (caddr_t)sa);
437 len += dlen;
438 }
439 if (m->m_pkthdr.len != len) {
440 m_freem(m);
441 return (NULL);
442 }
443 rtm->rtm_msglen = len;
444 rtm->rtm_version = RTM_VERSION;
445 rtm->rtm_type = type;
446 return (m);
447 }
448
449 static int
rt_msg2(type,rtinfo,cp,w)450 rt_msg2(type, rtinfo, cp, w)
451 int type;
452 register struct rt_addrinfo *rtinfo;
453 caddr_t cp;
454 struct walkarg *w;
455 {
456 register int i;
457 int len, dlen, second_time = 0;
458 caddr_t cp0;
459
460 rtinfo->rti_addrs = 0;
461 again:
462 switch (type) {
463
464 case RTM_DELADDR:
465 case RTM_NEWADDR:
466 len = sizeof(struct ifa_msghdr);
467 break;
468
469 case RTM_IFINFO:
470 len = sizeof(struct if_msghdr);
471 break;
472
473 default:
474 len = sizeof(struct rt_msghdr);
475 }
476 if (cp0 = cp)
477 cp += len;
478 for (i = 0; i < RTAX_MAX; i++) {
479 register struct sockaddr *sa;
480
481 if ((sa = rtinfo->rti_info[i]) == 0)
482 continue;
483 rtinfo->rti_addrs |= (1 << i);
484 dlen = ROUNDUP(sa->sa_len);
485 if (cp) {
486 bcopy((caddr_t)sa, cp, (unsigned)dlen);
487 cp += dlen;
488 }
489 len += dlen;
490 }
491 if (cp == 0 && w != NULL && !second_time) {
492 register struct walkarg *rw = w;
493
494 rw->w_needed += len;
495 if (rw->w_needed <= 0 && rw->w_where) {
496 if (rw->w_tmemsize < len) {
497 if (rw->w_tmem)
498 free(rw->w_tmem, M_RTABLE);
499 if (rw->w_tmem = (caddr_t)
500 malloc(len, M_RTABLE, M_NOWAIT))
501 rw->w_tmemsize = len;
502 }
503 if (rw->w_tmem) {
504 cp = rw->w_tmem;
505 second_time = 1;
506 goto again;
507 } else
508 rw->w_where = 0;
509 }
510 }
511 if (cp) {
512 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
513
514 rtm->rtm_version = RTM_VERSION;
515 rtm->rtm_type = type;
516 rtm->rtm_msglen = len;
517 }
518 return (len);
519 }
520
521 /*
522 * This routine is called to generate a message from the routing
523 * socket indicating that a redirect has occured, a routing lookup
524 * has failed, or that a protocol has detected timeouts to a particular
525 * destination.
526 */
527 void
rt_missmsg(type,rtinfo,flags,error)528 rt_missmsg(type, rtinfo, flags, error)
529 int type, flags, error;
530 register struct rt_addrinfo *rtinfo;
531 {
532 register struct rt_msghdr *rtm;
533 register struct mbuf *m;
534 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
535
536 if (route_cb.any_count == 0)
537 return;
538 m = rt_msg1(type, rtinfo);
539 if (m == 0)
540 return;
541 rtm = mtod(m, struct rt_msghdr *);
542 rtm->rtm_flags = RTF_DONE | flags;
543 rtm->rtm_errno = error;
544 rtm->rtm_addrs = rtinfo->rti_addrs;
545 route_proto.sp_protocol = sa ? sa->sa_family : 0;
546 raw_input(m, &route_proto, &route_src, &route_dst);
547 }
548
549 /*
550 * This routine is called to generate a message from the routing
551 * socket indicating that the status of a network interface has changed.
552 */
553 void
rt_ifmsg(ifp)554 rt_ifmsg(ifp)
555 register struct ifnet *ifp;
556 {
557 register struct if_msghdr *ifm;
558 struct mbuf *m;
559 struct rt_addrinfo info;
560
561 if (route_cb.any_count == 0)
562 return;
563 bzero((caddr_t)&info, sizeof(info));
564 m = rt_msg1(RTM_IFINFO, &info);
565 if (m == 0)
566 return;
567 ifm = mtod(m, struct if_msghdr *);
568 ifm->ifm_index = ifp->if_index;
569 ifm->ifm_flags = ifp->if_flags;
570 ifm->ifm_data = ifp->if_data;
571 ifm->ifm_addrs = 0;
572 route_proto.sp_protocol = 0;
573 raw_input(m, &route_proto, &route_src, &route_dst);
574 }
575
576 /*
577 * This is called to generate messages from the routing socket
578 * indicating a network interface has had addresses associated with it.
579 * if we ever reverse the logic and replace messages TO the routing
580 * socket indicate a request to configure interfaces, then it will
581 * be unnecessary as the routing socket will automatically generate
582 * copies of it.
583 */
584 void
rt_newaddrmsg(cmd,ifa,error,rt)585 rt_newaddrmsg(cmd, ifa, error, rt)
586 int cmd, error;
587 register struct ifaddr *ifa;
588 register struct rtentry *rt;
589 {
590 struct rt_addrinfo info;
591 struct sockaddr *sa;
592 int pass;
593 struct mbuf *m;
594 struct ifnet *ifp = ifa->ifa_ifp;
595
596 if (route_cb.any_count == 0)
597 return;
598 for (pass = 1; pass < 3; pass++) {
599 bzero((caddr_t)&info, sizeof(info));
600 if ((cmd == RTM_ADD && pass == 1) ||
601 (cmd == RTM_DELETE && pass == 2)) {
602 register struct ifa_msghdr *ifam;
603 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
604
605 ifaaddr = sa = ifa->ifa_addr;
606 ifpaddr = ifp->if_addrlist->ifa_addr;
607 netmask = ifa->ifa_netmask;
608 brdaddr = ifa->ifa_dstaddr;
609 if ((m = rt_msg1(ncmd, &info)) == NULL)
610 continue;
611 ifam = mtod(m, struct ifa_msghdr *);
612 ifam->ifam_index = ifp->if_index;
613 ifam->ifam_metric = ifa->ifa_metric;
614 ifam->ifam_flags = ifa->ifa_flags;
615 ifam->ifam_addrs = info.rti_addrs;
616 }
617 if ((cmd == RTM_ADD && pass == 2) ||
618 (cmd == RTM_DELETE && pass == 1)) {
619 register struct rt_msghdr *rtm;
620
621 if (rt == 0)
622 continue;
623 netmask = rt_mask(rt);
624 dst = sa = rt_key(rt);
625 gate = rt->rt_gateway;
626 if ((m = rt_msg1(cmd, &info)) == NULL)
627 continue;
628 rtm = mtod(m, struct rt_msghdr *);
629 rtm->rtm_index = ifp->if_index;
630 rtm->rtm_flags |= rt->rt_flags;
631 rtm->rtm_errno = error;
632 rtm->rtm_addrs = info.rti_addrs;
633 }
634 route_proto.sp_protocol = sa ? sa->sa_family : 0;
635 raw_input(m, &route_proto, &route_src, &route_dst);
636 }
637 }
638
639 /*
640 * This is used in dumping the kernel table via sysctl().
641 */
642 int
sysctl_dumpentry(rn,w)643 sysctl_dumpentry(rn, w)
644 struct radix_node *rn;
645 register struct walkarg *w;
646 {
647 register struct rtentry *rt = (struct rtentry *)rn;
648 int error = 0, size;
649 struct rt_addrinfo info;
650
651 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
652 return 0;
653 bzero((caddr_t)&info, sizeof(info));
654 dst = rt_key(rt);
655 gate = rt->rt_gateway;
656 netmask = rt_mask(rt);
657 genmask = rt->rt_genmask;
658 if (rt->rt_ifp) {
659 ifpaddr = rt->rt_ifp->if_addrlist->ifa_addr;
660 ifaaddr = rt->rt_ifa->ifa_addr;
661 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT)
662 brdaddr = rt->rt_ifa->ifa_dstaddr;
663 }
664 size = rt_msg2(RTM_GET, &info, 0, w);
665 if (w->w_where && w->w_tmem) {
666 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
667
668 rtm->rtm_flags = rt->rt_flags;
669 rtm->rtm_use = rt->rt_use;
670 rtm->rtm_rmx = rt->rt_rmx;
671 rtm->rtm_index = rt->rt_ifp->if_index;
672 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
673 rtm->rtm_addrs = info.rti_addrs;
674 if (error = copyout((caddr_t)rtm, w->w_where, size))
675 w->w_where = NULL;
676 else
677 w->w_where += size;
678 }
679 return (error);
680 }
681
682 int
sysctl_iflist(af,w)683 sysctl_iflist(af, w)
684 int af;
685 register struct walkarg *w;
686 {
687 register struct ifnet *ifp;
688 register struct ifaddr *ifa;
689 struct rt_addrinfo info;
690 int len, error = 0;
691
692 bzero((caddr_t)&info, sizeof(info));
693 for (ifp = ifnet; ifp; ifp = ifp->if_next) {
694 if (w->w_arg && w->w_arg != ifp->if_index)
695 continue;
696 ifa = ifp->if_addrlist;
697 ifpaddr = ifa->ifa_addr;
698 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
699 ifpaddr = 0;
700 if (w->w_where && w->w_tmem) {
701 register struct if_msghdr *ifm;
702
703 ifm = (struct if_msghdr *)w->w_tmem;
704 ifm->ifm_index = ifp->if_index;
705 ifm->ifm_flags = ifp->if_flags;
706 ifm->ifm_data = ifp->if_data;
707 ifm->ifm_addrs = info.rti_addrs;
708 if (error = copyout((caddr_t)ifm, w->w_where, len))
709 return (error);
710 w->w_where += len;
711 }
712 while (ifa = ifa->ifa_next) {
713 if (af && af != ifa->ifa_addr->sa_family)
714 continue;
715 ifaaddr = ifa->ifa_addr;
716 netmask = ifa->ifa_netmask;
717 brdaddr = ifa->ifa_dstaddr;
718 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
719 if (w->w_where && w->w_tmem) {
720 register struct ifa_msghdr *ifam;
721
722 ifam = (struct ifa_msghdr *)w->w_tmem;
723 ifam->ifam_index = ifa->ifa_ifp->if_index;
724 ifam->ifam_flags = ifa->ifa_flags;
725 ifam->ifam_metric = ifa->ifa_metric;
726 ifam->ifam_addrs = info.rti_addrs;
727 if (error = copyout(w->w_tmem, w->w_where, len))
728 return (error);
729 w->w_where += len;
730 }
731 }
732 ifaaddr = netmask = brdaddr = 0;
733 }
734 return (0);
735 }
736
737 int
sysctl_rtable(name,namelen,where,given,new,newlen)738 sysctl_rtable(name, namelen, where, given, new, newlen)
739 int *name;
740 int namelen;
741 caddr_t where;
742 size_t *given;
743 caddr_t *new;
744 size_t newlen;
745 {
746 register struct radix_node_head *rnh;
747 int i, s, error = EINVAL;
748 u_char af;
749 struct walkarg w;
750
751 if (new)
752 return (EPERM);
753 if (namelen != 3)
754 return (EINVAL);
755 af = name[0];
756 Bzero(&w, sizeof(w));
757 w.w_where = where;
758 w.w_given = *given;
759 w.w_needed = 0 - w.w_given;
760 w.w_op = name[1];
761 w.w_arg = name[2];
762
763 s = splnet();
764 switch (w.w_op) {
765
766 case NET_RT_DUMP:
767 case NET_RT_FLAGS:
768 for (i = 1; i <= AF_MAX; i++)
769 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
770 (error = rnh->rnh_walktree(rnh,
771 sysctl_dumpentry, &w)))
772 break;
773 break;
774
775 case NET_RT_IFLIST:
776 error = sysctl_iflist(af, &w);
777 }
778 splx(s);
779 if (w.w_tmem)
780 free(w.w_tmem, M_RTABLE);
781 w.w_needed += w.w_given;
782 if (where) {
783 *given = w.w_where - where;
784 if (*given < w.w_needed)
785 return (ENOMEM);
786 } else {
787 *given = (11 * w.w_needed) / 10;
788 }
789 return (error);
790 }
791
792 /*
793 * Definitions of protocols supported in the ROUTE domain.
794 */
795
796 extern struct domain routedomain; /* or at least forward */
797
798 struct protosw routesw[] = {
799 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
800 raw_input, route_output, raw_ctlinput, 0,
801 route_usrreq,
802 raw_init, 0, 0, 0,
803 sysctl_rtable,
804 }
805 };
806
807 struct domain routedomain =
808 { PF_ROUTE, "route", route_init, 0, 0,
809 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
810