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sdiff udiff text old ( 27504 ) new ( 28270 )
full compact
rtsock.c (27504) rtsock.c (28270)
1/*
2 * Copyright (c) 1988, 1991, 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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)rtsock.c 8.5 (Berkeley) 11/2/94
1/*
2 * Copyright (c) 1988, 1991, 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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)rtsock.c 8.5 (Berkeley) 11/2/94
34 * $Id: rtsock.c,v 1.30 1997/07/17 09:21:34 msmith Exp $
34 * $Id: rtsock.c,v 1.31 1997/07/18 11:44:24 julian Exp $
35 */
36
37
38#include <sys/param.h>
39#include <sys/queue.h>
40#include <sys/systm.h>
41#include <sys/kernel.h>
42#include <sys/sysctl.h>
43#include <sys/proc.h>
44#include <sys/mbuf.h>
45#include <sys/socket.h>
46#include <sys/socketvar.h>
47#include <sys/domain.h>
48#include <sys/protosw.h>
49
50#include <net/if.h>
51#include <net/route.h>
52#include <net/raw_cb.h>
53
54static struct sockaddr route_dst = { 2, PF_ROUTE, };
55static struct sockaddr route_src = { 2, PF_ROUTE, };
56static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
57static struct sockproto route_proto = { PF_ROUTE, };
58
59struct walkarg {
60 int w_tmemsize;
61 int w_op, w_arg;
62 caddr_t w_tmem;
63 struct sysctl_req *w_req;
64};
65
66static struct mbuf *
67 rt_msg1 __P((int, struct rt_addrinfo *));
68static int rt_msg2 __P((int,
69 struct rt_addrinfo *, caddr_t, struct walkarg *));
70static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *));
71static int sysctl_dumpentry __P((struct radix_node *rn, void *vw));
72static int sysctl_iflist __P((int af, struct walkarg *w));
73static int route_output __P((struct mbuf *, struct socket *));
74static void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *));
75
76/* Sleazy use of local variables throughout file, warning!!!! */
77#define dst info.rti_info[RTAX_DST]
78#define gate info.rti_info[RTAX_GATEWAY]
79#define netmask info.rti_info[RTAX_NETMASK]
80#define genmask info.rti_info[RTAX_GENMASK]
81#define ifpaddr info.rti_info[RTAX_IFP]
82#define ifaaddr info.rti_info[RTAX_IFA]
83#define brdaddr info.rti_info[RTAX_BRD]
84
85/*
86 * It really doesn't make any sense at all for this code to share much
87 * with raw_usrreq.c, since its functionality is so restricted. XXX
88 */
89static int
90rts_abort(struct socket *so)
91{
92 int s, error;
93 s = splnet();
94 error = raw_usrreqs.pru_abort(so);
95 splx(s);
96 return error;
97}
98
99/* pru_accept is EOPNOTSUPP */
100
101static int
102rts_attach(struct socket *so, int proto, struct proc *p)
103{
104 struct rawcb *rp;
105 int s, error;
106
107 if (sotorawcb(so) != 0)
108 return EISCONN; /* XXX panic? */
109 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK); /* XXX */
110 if (rp == 0)
111 return ENOBUFS;
112 bzero(rp, sizeof *rp);
113
114 /*
115 * The splnet() is necessary to block protocols from sending
116 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
117 * this PCB is extant but incompletely initialized.
118 * Probably we should try to do more of this work beforehand and
119 * eliminate the spl.
120 */
121 s = splnet();
122 so->so_pcb = (caddr_t)rp;
123 error = raw_usrreqs.pru_attach(so, proto, p);
124 rp = sotorawcb(so);
125 if (error) {
126 splx(s);
127 free(rp, M_PCB);
128 return error;
129 }
130 switch(rp->rcb_proto.sp_protocol) {
131 case AF_INET:
132 route_cb.ip_count++;
133 break;
134 case AF_IPX:
135 route_cb.ipx_count++;
136 break;
137 case AF_NS:
138 route_cb.ns_count++;
139 break;
140 case AF_ISO:
141 route_cb.iso_count++;
142 break;
143 }
144 rp->rcb_faddr = &route_src;
145 route_cb.any_count++;
146 soisconnected(so);
147 so->so_options |= SO_USELOOPBACK;
148 splx(s);
149 return 0;
150}
151
152static int
35 */
36
37
38#include <sys/param.h>
39#include <sys/queue.h>
40#include <sys/systm.h>
41#include <sys/kernel.h>
42#include <sys/sysctl.h>
43#include <sys/proc.h>
44#include <sys/mbuf.h>
45#include <sys/socket.h>
46#include <sys/socketvar.h>
47#include <sys/domain.h>
48#include <sys/protosw.h>
49
50#include <net/if.h>
51#include <net/route.h>
52#include <net/raw_cb.h>
53
54static struct sockaddr route_dst = { 2, PF_ROUTE, };
55static struct sockaddr route_src = { 2, PF_ROUTE, };
56static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, };
57static struct sockproto route_proto = { PF_ROUTE, };
58
59struct walkarg {
60 int w_tmemsize;
61 int w_op, w_arg;
62 caddr_t w_tmem;
63 struct sysctl_req *w_req;
64};
65
66static struct mbuf *
67 rt_msg1 __P((int, struct rt_addrinfo *));
68static int rt_msg2 __P((int,
69 struct rt_addrinfo *, caddr_t, struct walkarg *));
70static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *));
71static int sysctl_dumpentry __P((struct radix_node *rn, void *vw));
72static int sysctl_iflist __P((int af, struct walkarg *w));
73static int route_output __P((struct mbuf *, struct socket *));
74static void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *));
75
76/* Sleazy use of local variables throughout file, warning!!!! */
77#define dst info.rti_info[RTAX_DST]
78#define gate info.rti_info[RTAX_GATEWAY]
79#define netmask info.rti_info[RTAX_NETMASK]
80#define genmask info.rti_info[RTAX_GENMASK]
81#define ifpaddr info.rti_info[RTAX_IFP]
82#define ifaaddr info.rti_info[RTAX_IFA]
83#define brdaddr info.rti_info[RTAX_BRD]
84
85/*
86 * It really doesn't make any sense at all for this code to share much
87 * with raw_usrreq.c, since its functionality is so restricted. XXX
88 */
89static int
90rts_abort(struct socket *so)
91{
92 int s, error;
93 s = splnet();
94 error = raw_usrreqs.pru_abort(so);
95 splx(s);
96 return error;
97}
98
99/* pru_accept is EOPNOTSUPP */
100
101static int
102rts_attach(struct socket *so, int proto, struct proc *p)
103{
104 struct rawcb *rp;
105 int s, error;
106
107 if (sotorawcb(so) != 0)
108 return EISCONN; /* XXX panic? */
109 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK); /* XXX */
110 if (rp == 0)
111 return ENOBUFS;
112 bzero(rp, sizeof *rp);
113
114 /*
115 * The splnet() is necessary to block protocols from sending
116 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
117 * this PCB is extant but incompletely initialized.
118 * Probably we should try to do more of this work beforehand and
119 * eliminate the spl.
120 */
121 s = splnet();
122 so->so_pcb = (caddr_t)rp;
123 error = raw_usrreqs.pru_attach(so, proto, p);
124 rp = sotorawcb(so);
125 if (error) {
126 splx(s);
127 free(rp, M_PCB);
128 return error;
129 }
130 switch(rp->rcb_proto.sp_protocol) {
131 case AF_INET:
132 route_cb.ip_count++;
133 break;
134 case AF_IPX:
135 route_cb.ipx_count++;
136 break;
137 case AF_NS:
138 route_cb.ns_count++;
139 break;
140 case AF_ISO:
141 route_cb.iso_count++;
142 break;
143 }
144 rp->rcb_faddr = &route_src;
145 route_cb.any_count++;
146 soisconnected(so);
147 so->so_options |= SO_USELOOPBACK;
148 splx(s);
149 return 0;
150}
151
152static int
153rts_bind(struct socket *so, struct mbuf *nam, struct proc *p)
153rts_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
154{
155 int s, error;
156 s = splnet();
157 error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
158 splx(s);
159 return error;
160}
161
162static int
154{
155 int s, error;
156 s = splnet();
157 error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
158 splx(s);
159 return error;
160}
161
162static int
163rts_connect(struct socket *so, struct mbuf *nam, struct proc *p)
163rts_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
164{
165 int s, error;
166 s = splnet();
167 error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
168 splx(s);
169 return error;
170}
171
172/* pru_connect2 is EOPNOTSUPP */
173/* pru_control is EOPNOTSUPP */
174
175static int
176rts_detach(struct socket *so)
177{
178 struct rawcb *rp = sotorawcb(so);
179 int s, error;
180
181 s = splnet();
182 if (rp != 0) {
183 switch(rp->rcb_proto.sp_protocol) {
184 case AF_INET:
185 route_cb.ip_count--;
186 break;
187 case AF_IPX:
188 route_cb.ipx_count--;
189 break;
190 case AF_NS:
191 route_cb.ns_count--;
192 break;
193 case AF_ISO:
194 route_cb.iso_count--;
195 break;
196 }
197 route_cb.any_count--;
198 }
199 error = raw_usrreqs.pru_detach(so);
200 splx(s);
201 return error;
202}
203
204static int
205rts_disconnect(struct socket *so)
206{
207 int s, error;
208 s = splnet();
209 error = raw_usrreqs.pru_disconnect(so);
210 splx(s);
211 return error;
212}
213
214/* pru_listen is EOPNOTSUPP */
215
216static int
164{
165 int s, error;
166 s = splnet();
167 error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
168 splx(s);
169 return error;
170}
171
172/* pru_connect2 is EOPNOTSUPP */
173/* pru_control is EOPNOTSUPP */
174
175static int
176rts_detach(struct socket *so)
177{
178 struct rawcb *rp = sotorawcb(so);
179 int s, error;
180
181 s = splnet();
182 if (rp != 0) {
183 switch(rp->rcb_proto.sp_protocol) {
184 case AF_INET:
185 route_cb.ip_count--;
186 break;
187 case AF_IPX:
188 route_cb.ipx_count--;
189 break;
190 case AF_NS:
191 route_cb.ns_count--;
192 break;
193 case AF_ISO:
194 route_cb.iso_count--;
195 break;
196 }
197 route_cb.any_count--;
198 }
199 error = raw_usrreqs.pru_detach(so);
200 splx(s);
201 return error;
202}
203
204static int
205rts_disconnect(struct socket *so)
206{
207 int s, error;
208 s = splnet();
209 error = raw_usrreqs.pru_disconnect(so);
210 splx(s);
211 return error;
212}
213
214/* pru_listen is EOPNOTSUPP */
215
216static int
217rts_peeraddr(struct socket *so, struct mbuf *nam)
217rts_peeraddr(struct socket *so, struct sockaddr **nam)
218{
219 int s, error;
220 s = splnet();
221 error = raw_usrreqs.pru_peeraddr(so, nam);
222 splx(s);
223 return error;
224}
225
226/* pru_rcvd is EOPNOTSUPP */
227/* pru_rcvoob is EOPNOTSUPP */
228
229static int
218{
219 int s, error;
220 s = splnet();
221 error = raw_usrreqs.pru_peeraddr(so, nam);
222 splx(s);
223 return error;
224}
225
226/* pru_rcvd is EOPNOTSUPP */
227/* pru_rcvoob is EOPNOTSUPP */
228
229static int
230rts_send(struct socket *so, int flags, struct mbuf *m, struct mbuf *nam,
230rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
231 struct mbuf *control, struct proc *p)
232{
233 int s, error;
234 s = splnet();
235 error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
236 splx(s);
237 return error;
238}
239
240/* pru_sense is null */
241
242static int
243rts_shutdown(struct socket *so)
244{
245 int s, error;
246 s = splnet();
247 error = raw_usrreqs.pru_shutdown(so);
248 splx(s);
249 return error;
250}
251
252static int
231 struct mbuf *control, struct proc *p)
232{
233 int s, error;
234 s = splnet();
235 error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
236 splx(s);
237 return error;
238}
239
240/* pru_sense is null */
241
242static int
243rts_shutdown(struct socket *so)
244{
245 int s, error;
246 s = splnet();
247 error = raw_usrreqs.pru_shutdown(so);
248 splx(s);
249 return error;
250}
251
252static int
253rts_sockaddr(struct socket *so, struct mbuf *nam)
253rts_sockaddr(struct socket *so, struct sockaddr **nam)
254{
255 int s, error;
256 s = splnet();
257 error = raw_usrreqs.pru_sockaddr(so, nam);
258 splx(s);
259 return error;
260}
261
262static struct pr_usrreqs route_usrreqs = {
263 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
264 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
265 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
266 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
267 sosend, soreceive, soselect
268};
269
270/*ARGSUSED*/
271static int
272route_output(m, so)
273 register struct mbuf *m;
274 struct socket *so;
275{
276 register struct rt_msghdr *rtm = 0;
277 register struct rtentry *rt = 0;
278 struct rtentry *saved_nrt = 0;
279 struct radix_node_head *rnh;
280 struct rt_addrinfo info;
281 int len, error = 0;
282 struct ifnet *ifp = 0;
283 struct ifaddr *ifa = 0;
284
285#define senderr(e) { error = e; goto flush;}
286 if (m == 0 || ((m->m_len < sizeof(long)) &&
287 (m = m_pullup(m, sizeof(long))) == 0))
288 return (ENOBUFS);
289 if ((m->m_flags & M_PKTHDR) == 0)
290 panic("route_output");
291 len = m->m_pkthdr.len;
292 if (len < sizeof(*rtm) ||
293 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
294 dst = 0;
295 senderr(EINVAL);
296 }
297 R_Malloc(rtm, struct rt_msghdr *, len);
298 if (rtm == 0) {
299 dst = 0;
300 senderr(ENOBUFS);
301 }
302 m_copydata(m, 0, len, (caddr_t)rtm);
303 if (rtm->rtm_version != RTM_VERSION) {
304 dst = 0;
305 senderr(EPROTONOSUPPORT);
306 }
307 rtm->rtm_pid = curproc->p_pid;
308 info.rti_addrs = rtm->rtm_addrs;
309 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
310 dst = 0;
311 senderr(EINVAL);
312 }
313 if (dst == 0 || (dst->sa_family >= AF_MAX)
314 || (gate != 0 && (gate->sa_family >= AF_MAX)))
315 senderr(EINVAL);
316 if (genmask) {
317 struct radix_node *t;
318 t = rn_addmask((caddr_t)genmask, 0, 1);
319 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
320 genmask = (struct sockaddr *)(t->rn_key);
321 else
322 senderr(ENOBUFS);
323 }
324 switch (rtm->rtm_type) {
325
326 case RTM_ADD:
327 if (gate == 0)
328 senderr(EINVAL);
329 error = rtrequest(RTM_ADD, dst, gate, netmask,
330 rtm->rtm_flags, &saved_nrt);
331 if (error == 0 && saved_nrt) {
332 rt_setmetrics(rtm->rtm_inits,
333 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
334 saved_nrt->rt_refcnt--;
335 saved_nrt->rt_genmask = genmask;
336 }
337 break;
338
339 case RTM_DELETE:
340 error = rtrequest(RTM_DELETE, dst, gate, netmask,
341 rtm->rtm_flags, &saved_nrt);
342 if (error == 0) {
343 if ((rt = saved_nrt))
344 rt->rt_refcnt++;
345 goto report;
346 }
347 break;
348
349 case RTM_GET:
350 case RTM_CHANGE:
351 case RTM_LOCK:
352 if ((rnh = rt_tables[dst->sa_family]) == 0) {
353 senderr(EAFNOSUPPORT);
354 } else if (rt = (struct rtentry *)
355 rnh->rnh_lookup(dst, netmask, rnh))
356 rt->rt_refcnt++;
357 else
358 senderr(ESRCH);
359 switch(rtm->rtm_type) {
360
361 case RTM_GET:
362 report:
363 dst = rt_key(rt);
364 gate = rt->rt_gateway;
365 netmask = rt_mask(rt);
366 genmask = rt->rt_genmask;
367 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
368 ifp = rt->rt_ifp;
369 if (ifp) {
370 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
371 ifaaddr = rt->rt_ifa->ifa_addr;
372 rtm->rtm_index = ifp->if_index;
373 } else {
374 ifpaddr = 0;
375 ifaaddr = 0;
376 }
377 }
378 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
379 (struct walkarg *)0);
380 if (len > rtm->rtm_msglen) {
381 struct rt_msghdr *new_rtm;
382 R_Malloc(new_rtm, struct rt_msghdr *, len);
383 if (new_rtm == 0)
384 senderr(ENOBUFS);
385 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
386 Free(rtm); rtm = new_rtm;
387 }
388 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
389 (struct walkarg *)0);
390 rtm->rtm_flags = rt->rt_flags;
391 rtm->rtm_rmx = rt->rt_rmx;
392 rtm->rtm_addrs = info.rti_addrs;
393 break;
394
395 case RTM_CHANGE:
396 if (gate && (error = rt_setgate(rt, rt_key(rt), gate)))
397 senderr(error);
398
399 /*
400 * If they tried to change things but didn't specify
401 * the required gateway, then just use the old one.
402 * This can happen if the user tries to change the
403 * flags on the default route without changing the
404 * default gateway. Changing flags still doesn't work.
405 */
406 if ((rt->rt_flags & RTF_GATEWAY) && !gate)
407 gate = rt->rt_gateway;
408
409 /* new gateway could require new ifaddr, ifp;
410 flags may also be different; ifp may be specified
411 by ll sockaddr when protocol address is ambiguous */
412 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) &&
413 (ifp = ifa->ifa_ifp) && (ifaaddr || gate))
414 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate,
415 ifp);
416 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) ||
417 (gate && (ifa = ifa_ifwithroute(rt->rt_flags,
418 rt_key(rt), gate))))
419 ifp = ifa->ifa_ifp;
420 if (ifa) {
421 register struct ifaddr *oifa = rt->rt_ifa;
422 if (oifa != ifa) {
423 if (oifa && oifa->ifa_rtrequest)
424 oifa->ifa_rtrequest(RTM_DELETE,
425 rt, gate);
426 IFAFREE(rt->rt_ifa);
427 rt->rt_ifa = ifa;
428 ifa->ifa_refcnt++;
429 rt->rt_ifp = ifp;
430 }
431 }
432 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
433 &rt->rt_rmx);
434 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
435 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
436 if (genmask)
437 rt->rt_genmask = genmask;
438 /*
439 * Fall into
440 */
441 case RTM_LOCK:
442 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
443 rt->rt_rmx.rmx_locks |=
444 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
445 break;
446 }
447 break;
448
449 default:
450 senderr(EOPNOTSUPP);
451 }
452
453flush:
454 if (rtm) {
455 if (error)
456 rtm->rtm_errno = error;
457 else
458 rtm->rtm_flags |= RTF_DONE;
459 }
460 if (rt)
461 rtfree(rt);
462 {
463 register struct rawcb *rp = 0;
464 /*
465 * Check to see if we don't want our own messages.
466 */
467 if ((so->so_options & SO_USELOOPBACK) == 0) {
468 if (route_cb.any_count <= 1) {
469 if (rtm)
470 Free(rtm);
471 m_freem(m);
472 return (error);
473 }
474 /* There is another listener, so construct message */
475 rp = sotorawcb(so);
476 }
477 if (rtm) {
478 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
479 Free(rtm);
480 }
481 if (rp)
482 rp->rcb_proto.sp_family = 0; /* Avoid us */
483 if (dst)
484 route_proto.sp_protocol = dst->sa_family;
485 raw_input(m, &route_proto, &route_src, &route_dst);
486 if (rp)
487 rp->rcb_proto.sp_family = PF_ROUTE;
488 }
489 return (error);
490}
491
492static void
493rt_setmetrics(which, in, out)
494 u_long which;
495 register struct rt_metrics *in, *out;
496{
497#define metric(f, e) if (which & (f)) out->e = in->e;
498 metric(RTV_RPIPE, rmx_recvpipe);
499 metric(RTV_SPIPE, rmx_sendpipe);
500 metric(RTV_SSTHRESH, rmx_ssthresh);
501 metric(RTV_RTT, rmx_rtt);
502 metric(RTV_RTTVAR, rmx_rttvar);
503 metric(RTV_HOPCOUNT, rmx_hopcount);
504 metric(RTV_MTU, rmx_mtu);
505 metric(RTV_EXPIRE, rmx_expire);
506#undef metric
507}
508
509#define ROUNDUP(a) \
510 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
511#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
512
513
514/*
515 * Extract the addresses of the passed sockaddrs.
516 * Do a little sanity checking so as to avoid bad memory references.
517 * This data is derived straight from userland.
518 */
519static int
520rt_xaddrs(cp, cplim, rtinfo)
521 register caddr_t cp, cplim;
522 register struct rt_addrinfo *rtinfo;
523{
524 register struct sockaddr *sa;
525 register int i;
526
527 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
528 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
529 if ((rtinfo->rti_addrs & (1 << i)) == 0)
530 continue;
531 sa = (struct sockaddr *)cp;
532 /*
533 * It won't fit.
534 */
535 if ( (cp + sa->sa_len) > cplim ) {
536 return (EINVAL);
537 }
538
539 /*
540 * there are no more.. quit now
541 * If there are more bits, they are in error.
542 * I've seen this. route(1) can evidently generate these.
543 * This causes kernel to core dump.
544 * for compatibility, If we see this, point to a safe address.
545 */
546 if (sa->sa_len == 0) {
547 rtinfo->rti_info[i] = &sa_zero;
548 return (0); /* should be EINVAL but for compat */
549 }
550
551 /* accept it */
552 rtinfo->rti_info[i] = sa;
553 ADVANCE(cp, sa);
554 }
555 return (0);
556}
557
558static struct mbuf *
559rt_msg1(type, rtinfo)
560 int type;
561 register struct rt_addrinfo *rtinfo;
562{
563 register struct rt_msghdr *rtm;
564 register struct mbuf *m;
565 register int i;
566 register struct sockaddr *sa;
567 int len, dlen;
568
569 m = m_gethdr(M_DONTWAIT, MT_DATA);
570 if (m == 0)
571 return (m);
572 switch (type) {
573
574 case RTM_DELADDR:
575 case RTM_NEWADDR:
576 len = sizeof(struct ifa_msghdr);
577 break;
578
579 case RTM_DELMADDR:
580 case RTM_NEWMADDR:
581 len = sizeof(struct ifma_msghdr);
582 break;
583
584 case RTM_IFINFO:
585 len = sizeof(struct if_msghdr);
586 break;
587
588 default:
589 len = sizeof(struct rt_msghdr);
590 }
591 if (len > MHLEN)
592 panic("rt_msg1");
593 m->m_pkthdr.len = m->m_len = len;
594 m->m_pkthdr.rcvif = 0;
595 rtm = mtod(m, struct rt_msghdr *);
596 bzero((caddr_t)rtm, len);
597 for (i = 0; i < RTAX_MAX; i++) {
598 if ((sa = rtinfo->rti_info[i]) == NULL)
599 continue;
600 rtinfo->rti_addrs |= (1 << i);
601 dlen = ROUNDUP(sa->sa_len);
602 m_copyback(m, len, dlen, (caddr_t)sa);
603 len += dlen;
604 }
605 if (m->m_pkthdr.len != len) {
606 m_freem(m);
607 return (NULL);
608 }
609 rtm->rtm_msglen = len;
610 rtm->rtm_version = RTM_VERSION;
611 rtm->rtm_type = type;
612 return (m);
613}
614
615static int
616rt_msg2(type, rtinfo, cp, w)
617 int type;
618 register struct rt_addrinfo *rtinfo;
619 caddr_t cp;
620 struct walkarg *w;
621{
622 register int i;
623 int len, dlen, second_time = 0;
624 caddr_t cp0;
625
626 rtinfo->rti_addrs = 0;
627again:
628 switch (type) {
629
630 case RTM_DELADDR:
631 case RTM_NEWADDR:
632 len = sizeof(struct ifa_msghdr);
633 break;
634
635 case RTM_IFINFO:
636 len = sizeof(struct if_msghdr);
637 break;
638
639 default:
640 len = sizeof(struct rt_msghdr);
641 }
642 cp0 = cp;
643 if (cp0)
644 cp += len;
645 for (i = 0; i < RTAX_MAX; i++) {
646 register struct sockaddr *sa;
647
648 if ((sa = rtinfo->rti_info[i]) == 0)
649 continue;
650 rtinfo->rti_addrs |= (1 << i);
651 dlen = ROUNDUP(sa->sa_len);
652 if (cp) {
653 bcopy((caddr_t)sa, cp, (unsigned)dlen);
654 cp += dlen;
655 }
656 len += dlen;
657 }
658 if (cp == 0 && w != NULL && !second_time) {
659 register struct walkarg *rw = w;
660
661 if (rw->w_req) {
662 if (rw->w_tmemsize < len) {
663 if (rw->w_tmem)
664 free(rw->w_tmem, M_RTABLE);
665 rw->w_tmem = (caddr_t)
666 malloc(len, M_RTABLE, M_NOWAIT);
667 if (rw->w_tmem)
668 rw->w_tmemsize = len;
669 }
670 if (rw->w_tmem) {
671 cp = rw->w_tmem;
672 second_time = 1;
673 goto again;
674 }
675 }
676 }
677 if (cp) {
678 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
679
680 rtm->rtm_version = RTM_VERSION;
681 rtm->rtm_type = type;
682 rtm->rtm_msglen = len;
683 }
684 return (len);
685}
686
687/*
688 * This routine is called to generate a message from the routing
689 * socket indicating that a redirect has occured, a routing lookup
690 * has failed, or that a protocol has detected timeouts to a particular
691 * destination.
692 */
693void
694rt_missmsg(type, rtinfo, flags, error)
695 int type, flags, error;
696 register struct rt_addrinfo *rtinfo;
697{
698 register struct rt_msghdr *rtm;
699 register struct mbuf *m;
700 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
701
702 if (route_cb.any_count == 0)
703 return;
704 m = rt_msg1(type, rtinfo);
705 if (m == 0)
706 return;
707 rtm = mtod(m, struct rt_msghdr *);
708 rtm->rtm_flags = RTF_DONE | flags;
709 rtm->rtm_errno = error;
710 rtm->rtm_addrs = rtinfo->rti_addrs;
711 route_proto.sp_protocol = sa ? sa->sa_family : 0;
712 raw_input(m, &route_proto, &route_src, &route_dst);
713}
714
715/*
716 * This routine is called to generate a message from the routing
717 * socket indicating that the status of a network interface has changed.
718 */
719void
720rt_ifmsg(ifp)
721 register struct ifnet *ifp;
722{
723 register struct if_msghdr *ifm;
724 struct mbuf *m;
725 struct rt_addrinfo info;
726
727 if (route_cb.any_count == 0)
728 return;
729 bzero((caddr_t)&info, sizeof(info));
730 m = rt_msg1(RTM_IFINFO, &info);
731 if (m == 0)
732 return;
733 ifm = mtod(m, struct if_msghdr *);
734 ifm->ifm_index = ifp->if_index;
735 ifm->ifm_flags = (u_short)ifp->if_flags;
736 ifm->ifm_data = ifp->if_data;
737 ifm->ifm_addrs = 0;
738 route_proto.sp_protocol = 0;
739 raw_input(m, &route_proto, &route_src, &route_dst);
740}
741
742/*
743 * This is called to generate messages from the routing socket
744 * indicating a network interface has had addresses associated with it.
745 * if we ever reverse the logic and replace messages TO the routing
746 * socket indicate a request to configure interfaces, then it will
747 * be unnecessary as the routing socket will automatically generate
748 * copies of it.
749 */
750void
751rt_newaddrmsg(cmd, ifa, error, rt)
752 int cmd, error;
753 register struct ifaddr *ifa;
754 register struct rtentry *rt;
755{
756 struct rt_addrinfo info;
757 struct sockaddr *sa = 0;
758 int pass;
759 struct mbuf *m = 0;
760 struct ifnet *ifp = ifa->ifa_ifp;
761
762 if (route_cb.any_count == 0)
763 return;
764 for (pass = 1; pass < 3; pass++) {
765 bzero((caddr_t)&info, sizeof(info));
766 if ((cmd == RTM_ADD && pass == 1) ||
767 (cmd == RTM_DELETE && pass == 2)) {
768 register struct ifa_msghdr *ifam;
769 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
770
771 ifaaddr = sa = ifa->ifa_addr;
772 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
773 netmask = ifa->ifa_netmask;
774 brdaddr = ifa->ifa_dstaddr;
775 if ((m = rt_msg1(ncmd, &info)) == NULL)
776 continue;
777 ifam = mtod(m, struct ifa_msghdr *);
778 ifam->ifam_index = ifp->if_index;
779 ifam->ifam_metric = ifa->ifa_metric;
780 ifam->ifam_flags = ifa->ifa_flags;
781 ifam->ifam_addrs = info.rti_addrs;
782 }
783 if ((cmd == RTM_ADD && pass == 2) ||
784 (cmd == RTM_DELETE && pass == 1)) {
785 register struct rt_msghdr *rtm;
786
787 if (rt == 0)
788 continue;
789 netmask = rt_mask(rt);
790 dst = sa = rt_key(rt);
791 gate = rt->rt_gateway;
792 if ((m = rt_msg1(cmd, &info)) == NULL)
793 continue;
794 rtm = mtod(m, struct rt_msghdr *);
795 rtm->rtm_index = ifp->if_index;
796 rtm->rtm_flags |= rt->rt_flags;
797 rtm->rtm_errno = error;
798 rtm->rtm_addrs = info.rti_addrs;
799 }
800 route_proto.sp_protocol = sa ? sa->sa_family : 0;
801 raw_input(m, &route_proto, &route_src, &route_dst);
802 }
803}
804
805/*
806 * This is the analogue to the rt_newaddrmsg which performs the same
807 * function but for multicast group memberhips. This is easier since
808 * there is no route state to worry about.
809 */
810void
811rt_newmaddrmsg(cmd, ifma)
812 int cmd;
813 struct ifmultiaddr *ifma;
814{
815 struct rt_addrinfo info;
816 struct mbuf *m = 0;
817 struct ifnet *ifp = ifma->ifma_ifp;
818 struct ifma_msghdr *ifmam;
819
820 if (route_cb.any_count == 0)
821 return;
822
823 bzero((caddr_t)&info, sizeof(info));
824 ifaaddr = ifma->ifma_addr;
825 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
826 /*
827 * If a link-layer address is present, present it as a ``gateway''
828 * (similarly to how ARP entries, e.g., are presented).
829 */
830 gate = ifma->ifma_lladdr;
831 if ((m = rt_msg1(cmd, &info)) == NULL)
832 return;
833 ifmam = mtod(m, struct ifma_msghdr *);
834 ifmam->ifmam_index = ifp->if_index;
835 ifmam->ifmam_addrs = info.rti_addrs;
836 route_proto.sp_protocol = ifma->ifma_addr->sa_family;
837 raw_input(m, &route_proto, &route_src, &route_dst);
838}
839
840/*
841 * This is used in dumping the kernel table via sysctl().
842 */
843int
844sysctl_dumpentry(rn, vw)
845 struct radix_node *rn;
846 void *vw;
847{
848 register struct walkarg *w = vw;
849 register struct rtentry *rt = (struct rtentry *)rn;
850 int error = 0, size;
851 struct rt_addrinfo info;
852
853 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
854 return 0;
855 bzero((caddr_t)&info, sizeof(info));
856 dst = rt_key(rt);
857 gate = rt->rt_gateway;
858 netmask = rt_mask(rt);
859 genmask = rt->rt_genmask;
860 size = rt_msg2(RTM_GET, &info, 0, w);
861 if (w->w_req && w->w_tmem) {
862 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
863
864 rtm->rtm_flags = rt->rt_flags;
865 rtm->rtm_use = rt->rt_use;
866 rtm->rtm_rmx = rt->rt_rmx;
867 rtm->rtm_index = rt->rt_ifp->if_index;
868 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
869 rtm->rtm_addrs = info.rti_addrs;
870 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
871 return (error);
872 }
873 return (error);
874}
875
876int
877sysctl_iflist(af, w)
878 int af;
879 register struct walkarg *w;
880{
881 register struct ifnet *ifp;
882 register struct ifaddr *ifa;
883 struct rt_addrinfo info;
884 int len, error = 0;
885
886 bzero((caddr_t)&info, sizeof(info));
887 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
888 if (w->w_arg && w->w_arg != ifp->if_index)
889 continue;
890 ifa = ifp->if_addrhead.tqh_first;
891 ifpaddr = ifa->ifa_addr;
892 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
893 ifpaddr = 0;
894 if (w->w_req && w->w_tmem) {
895 register struct if_msghdr *ifm;
896
897 ifm = (struct if_msghdr *)w->w_tmem;
898 ifm->ifm_index = ifp->if_index;
899 ifm->ifm_flags = (u_short)ifp->if_flags;
900 ifm->ifm_data = ifp->if_data;
901 ifm->ifm_addrs = info.rti_addrs;
902 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
903 if (error)
904 return (error);
905 }
906 while ((ifa = ifa->ifa_link.tqe_next) != 0) {
907 if (af && af != ifa->ifa_addr->sa_family)
908 continue;
909 ifaaddr = ifa->ifa_addr;
910 netmask = ifa->ifa_netmask;
911 brdaddr = ifa->ifa_dstaddr;
912 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
913 if (w->w_req && w->w_tmem) {
914 register struct ifa_msghdr *ifam;
915
916 ifam = (struct ifa_msghdr *)w->w_tmem;
917 ifam->ifam_index = ifa->ifa_ifp->if_index;
918 ifam->ifam_flags = ifa->ifa_flags;
919 ifam->ifam_metric = ifa->ifa_metric;
920 ifam->ifam_addrs = info.rti_addrs;
921 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
922 if (error)
923 return (error);
924 }
925 }
926 ifaaddr = netmask = brdaddr = 0;
927 }
928 return (0);
929}
930
931static int
932sysctl_rtsock SYSCTL_HANDLER_ARGS
933{
934 int *name = (int *)arg1;
935 u_int namelen = arg2;
936 register struct radix_node_head *rnh;
937 int i, s, error = EINVAL;
938 u_char af;
939 struct walkarg w;
940
941 name ++;
942 namelen--;
943 if (req->newptr)
944 return (EPERM);
945 if (namelen != 3)
946 return (EINVAL);
947 af = name[0];
948 Bzero(&w, sizeof(w));
949 w.w_op = name[1];
950 w.w_arg = name[2];
951 w.w_req = req;
952
953 s = splnet();
954 switch (w.w_op) {
955
956 case NET_RT_DUMP:
957 case NET_RT_FLAGS:
958 for (i = 1; i <= AF_MAX; i++)
959 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
960 (error = rnh->rnh_walktree(rnh,
961 sysctl_dumpentry, &w)))
962 break;
963 break;
964
965 case NET_RT_IFLIST:
966 error = sysctl_iflist(af, &w);
967 }
968 splx(s);
969 if (w.w_tmem)
970 free(w.w_tmem, M_RTABLE);
971 return (error);
972}
973
974SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
975
976/*
977 * Definitions of protocols supported in the ROUTE domain.
978 */
979
980extern struct domain routedomain; /* or at least forward */
981
982static struct protosw routesw[] = {
983{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
984 0, route_output, raw_ctlinput, 0,
985 0,
986 raw_init, 0, 0, 0,
987 &route_usrreqs
988}
989};
990
991static struct domain routedomain =
992 { PF_ROUTE, "route", route_init, 0, 0,
993 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
994
995DOMAIN_SET(route);
254{
255 int s, error;
256 s = splnet();
257 error = raw_usrreqs.pru_sockaddr(so, nam);
258 splx(s);
259 return error;
260}
261
262static struct pr_usrreqs route_usrreqs = {
263 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect,
264 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect,
265 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp,
266 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr,
267 sosend, soreceive, soselect
268};
269
270/*ARGSUSED*/
271static int
272route_output(m, so)
273 register struct mbuf *m;
274 struct socket *so;
275{
276 register struct rt_msghdr *rtm = 0;
277 register struct rtentry *rt = 0;
278 struct rtentry *saved_nrt = 0;
279 struct radix_node_head *rnh;
280 struct rt_addrinfo info;
281 int len, error = 0;
282 struct ifnet *ifp = 0;
283 struct ifaddr *ifa = 0;
284
285#define senderr(e) { error = e; goto flush;}
286 if (m == 0 || ((m->m_len < sizeof(long)) &&
287 (m = m_pullup(m, sizeof(long))) == 0))
288 return (ENOBUFS);
289 if ((m->m_flags & M_PKTHDR) == 0)
290 panic("route_output");
291 len = m->m_pkthdr.len;
292 if (len < sizeof(*rtm) ||
293 len != mtod(m, struct rt_msghdr *)->rtm_msglen) {
294 dst = 0;
295 senderr(EINVAL);
296 }
297 R_Malloc(rtm, struct rt_msghdr *, len);
298 if (rtm == 0) {
299 dst = 0;
300 senderr(ENOBUFS);
301 }
302 m_copydata(m, 0, len, (caddr_t)rtm);
303 if (rtm->rtm_version != RTM_VERSION) {
304 dst = 0;
305 senderr(EPROTONOSUPPORT);
306 }
307 rtm->rtm_pid = curproc->p_pid;
308 info.rti_addrs = rtm->rtm_addrs;
309 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) {
310 dst = 0;
311 senderr(EINVAL);
312 }
313 if (dst == 0 || (dst->sa_family >= AF_MAX)
314 || (gate != 0 && (gate->sa_family >= AF_MAX)))
315 senderr(EINVAL);
316 if (genmask) {
317 struct radix_node *t;
318 t = rn_addmask((caddr_t)genmask, 0, 1);
319 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0)
320 genmask = (struct sockaddr *)(t->rn_key);
321 else
322 senderr(ENOBUFS);
323 }
324 switch (rtm->rtm_type) {
325
326 case RTM_ADD:
327 if (gate == 0)
328 senderr(EINVAL);
329 error = rtrequest(RTM_ADD, dst, gate, netmask,
330 rtm->rtm_flags, &saved_nrt);
331 if (error == 0 && saved_nrt) {
332 rt_setmetrics(rtm->rtm_inits,
333 &rtm->rtm_rmx, &saved_nrt->rt_rmx);
334 saved_nrt->rt_refcnt--;
335 saved_nrt->rt_genmask = genmask;
336 }
337 break;
338
339 case RTM_DELETE:
340 error = rtrequest(RTM_DELETE, dst, gate, netmask,
341 rtm->rtm_flags, &saved_nrt);
342 if (error == 0) {
343 if ((rt = saved_nrt))
344 rt->rt_refcnt++;
345 goto report;
346 }
347 break;
348
349 case RTM_GET:
350 case RTM_CHANGE:
351 case RTM_LOCK:
352 if ((rnh = rt_tables[dst->sa_family]) == 0) {
353 senderr(EAFNOSUPPORT);
354 } else if (rt = (struct rtentry *)
355 rnh->rnh_lookup(dst, netmask, rnh))
356 rt->rt_refcnt++;
357 else
358 senderr(ESRCH);
359 switch(rtm->rtm_type) {
360
361 case RTM_GET:
362 report:
363 dst = rt_key(rt);
364 gate = rt->rt_gateway;
365 netmask = rt_mask(rt);
366 genmask = rt->rt_genmask;
367 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) {
368 ifp = rt->rt_ifp;
369 if (ifp) {
370 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
371 ifaaddr = rt->rt_ifa->ifa_addr;
372 rtm->rtm_index = ifp->if_index;
373 } else {
374 ifpaddr = 0;
375 ifaaddr = 0;
376 }
377 }
378 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0,
379 (struct walkarg *)0);
380 if (len > rtm->rtm_msglen) {
381 struct rt_msghdr *new_rtm;
382 R_Malloc(new_rtm, struct rt_msghdr *, len);
383 if (new_rtm == 0)
384 senderr(ENOBUFS);
385 Bcopy(rtm, new_rtm, rtm->rtm_msglen);
386 Free(rtm); rtm = new_rtm;
387 }
388 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm,
389 (struct walkarg *)0);
390 rtm->rtm_flags = rt->rt_flags;
391 rtm->rtm_rmx = rt->rt_rmx;
392 rtm->rtm_addrs = info.rti_addrs;
393 break;
394
395 case RTM_CHANGE:
396 if (gate && (error = rt_setgate(rt, rt_key(rt), gate)))
397 senderr(error);
398
399 /*
400 * If they tried to change things but didn't specify
401 * the required gateway, then just use the old one.
402 * This can happen if the user tries to change the
403 * flags on the default route without changing the
404 * default gateway. Changing flags still doesn't work.
405 */
406 if ((rt->rt_flags & RTF_GATEWAY) && !gate)
407 gate = rt->rt_gateway;
408
409 /* new gateway could require new ifaddr, ifp;
410 flags may also be different; ifp may be specified
411 by ll sockaddr when protocol address is ambiguous */
412 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) &&
413 (ifp = ifa->ifa_ifp) && (ifaaddr || gate))
414 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate,
415 ifp);
416 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) ||
417 (gate && (ifa = ifa_ifwithroute(rt->rt_flags,
418 rt_key(rt), gate))))
419 ifp = ifa->ifa_ifp;
420 if (ifa) {
421 register struct ifaddr *oifa = rt->rt_ifa;
422 if (oifa != ifa) {
423 if (oifa && oifa->ifa_rtrequest)
424 oifa->ifa_rtrequest(RTM_DELETE,
425 rt, gate);
426 IFAFREE(rt->rt_ifa);
427 rt->rt_ifa = ifa;
428 ifa->ifa_refcnt++;
429 rt->rt_ifp = ifp;
430 }
431 }
432 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx,
433 &rt->rt_rmx);
434 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest)
435 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate);
436 if (genmask)
437 rt->rt_genmask = genmask;
438 /*
439 * Fall into
440 */
441 case RTM_LOCK:
442 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits);
443 rt->rt_rmx.rmx_locks |=
444 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks);
445 break;
446 }
447 break;
448
449 default:
450 senderr(EOPNOTSUPP);
451 }
452
453flush:
454 if (rtm) {
455 if (error)
456 rtm->rtm_errno = error;
457 else
458 rtm->rtm_flags |= RTF_DONE;
459 }
460 if (rt)
461 rtfree(rt);
462 {
463 register struct rawcb *rp = 0;
464 /*
465 * Check to see if we don't want our own messages.
466 */
467 if ((so->so_options & SO_USELOOPBACK) == 0) {
468 if (route_cb.any_count <= 1) {
469 if (rtm)
470 Free(rtm);
471 m_freem(m);
472 return (error);
473 }
474 /* There is another listener, so construct message */
475 rp = sotorawcb(so);
476 }
477 if (rtm) {
478 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm);
479 Free(rtm);
480 }
481 if (rp)
482 rp->rcb_proto.sp_family = 0; /* Avoid us */
483 if (dst)
484 route_proto.sp_protocol = dst->sa_family;
485 raw_input(m, &route_proto, &route_src, &route_dst);
486 if (rp)
487 rp->rcb_proto.sp_family = PF_ROUTE;
488 }
489 return (error);
490}
491
492static void
493rt_setmetrics(which, in, out)
494 u_long which;
495 register struct rt_metrics *in, *out;
496{
497#define metric(f, e) if (which & (f)) out->e = in->e;
498 metric(RTV_RPIPE, rmx_recvpipe);
499 metric(RTV_SPIPE, rmx_sendpipe);
500 metric(RTV_SSTHRESH, rmx_ssthresh);
501 metric(RTV_RTT, rmx_rtt);
502 metric(RTV_RTTVAR, rmx_rttvar);
503 metric(RTV_HOPCOUNT, rmx_hopcount);
504 metric(RTV_MTU, rmx_mtu);
505 metric(RTV_EXPIRE, rmx_expire);
506#undef metric
507}
508
509#define ROUNDUP(a) \
510 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
511#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
512
513
514/*
515 * Extract the addresses of the passed sockaddrs.
516 * Do a little sanity checking so as to avoid bad memory references.
517 * This data is derived straight from userland.
518 */
519static int
520rt_xaddrs(cp, cplim, rtinfo)
521 register caddr_t cp, cplim;
522 register struct rt_addrinfo *rtinfo;
523{
524 register struct sockaddr *sa;
525 register int i;
526
527 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
528 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
529 if ((rtinfo->rti_addrs & (1 << i)) == 0)
530 continue;
531 sa = (struct sockaddr *)cp;
532 /*
533 * It won't fit.
534 */
535 if ( (cp + sa->sa_len) > cplim ) {
536 return (EINVAL);
537 }
538
539 /*
540 * there are no more.. quit now
541 * If there are more bits, they are in error.
542 * I've seen this. route(1) can evidently generate these.
543 * This causes kernel to core dump.
544 * for compatibility, If we see this, point to a safe address.
545 */
546 if (sa->sa_len == 0) {
547 rtinfo->rti_info[i] = &sa_zero;
548 return (0); /* should be EINVAL but for compat */
549 }
550
551 /* accept it */
552 rtinfo->rti_info[i] = sa;
553 ADVANCE(cp, sa);
554 }
555 return (0);
556}
557
558static struct mbuf *
559rt_msg1(type, rtinfo)
560 int type;
561 register struct rt_addrinfo *rtinfo;
562{
563 register struct rt_msghdr *rtm;
564 register struct mbuf *m;
565 register int i;
566 register struct sockaddr *sa;
567 int len, dlen;
568
569 m = m_gethdr(M_DONTWAIT, MT_DATA);
570 if (m == 0)
571 return (m);
572 switch (type) {
573
574 case RTM_DELADDR:
575 case RTM_NEWADDR:
576 len = sizeof(struct ifa_msghdr);
577 break;
578
579 case RTM_DELMADDR:
580 case RTM_NEWMADDR:
581 len = sizeof(struct ifma_msghdr);
582 break;
583
584 case RTM_IFINFO:
585 len = sizeof(struct if_msghdr);
586 break;
587
588 default:
589 len = sizeof(struct rt_msghdr);
590 }
591 if (len > MHLEN)
592 panic("rt_msg1");
593 m->m_pkthdr.len = m->m_len = len;
594 m->m_pkthdr.rcvif = 0;
595 rtm = mtod(m, struct rt_msghdr *);
596 bzero((caddr_t)rtm, len);
597 for (i = 0; i < RTAX_MAX; i++) {
598 if ((sa = rtinfo->rti_info[i]) == NULL)
599 continue;
600 rtinfo->rti_addrs |= (1 << i);
601 dlen = ROUNDUP(sa->sa_len);
602 m_copyback(m, len, dlen, (caddr_t)sa);
603 len += dlen;
604 }
605 if (m->m_pkthdr.len != len) {
606 m_freem(m);
607 return (NULL);
608 }
609 rtm->rtm_msglen = len;
610 rtm->rtm_version = RTM_VERSION;
611 rtm->rtm_type = type;
612 return (m);
613}
614
615static int
616rt_msg2(type, rtinfo, cp, w)
617 int type;
618 register struct rt_addrinfo *rtinfo;
619 caddr_t cp;
620 struct walkarg *w;
621{
622 register int i;
623 int len, dlen, second_time = 0;
624 caddr_t cp0;
625
626 rtinfo->rti_addrs = 0;
627again:
628 switch (type) {
629
630 case RTM_DELADDR:
631 case RTM_NEWADDR:
632 len = sizeof(struct ifa_msghdr);
633 break;
634
635 case RTM_IFINFO:
636 len = sizeof(struct if_msghdr);
637 break;
638
639 default:
640 len = sizeof(struct rt_msghdr);
641 }
642 cp0 = cp;
643 if (cp0)
644 cp += len;
645 for (i = 0; i < RTAX_MAX; i++) {
646 register struct sockaddr *sa;
647
648 if ((sa = rtinfo->rti_info[i]) == 0)
649 continue;
650 rtinfo->rti_addrs |= (1 << i);
651 dlen = ROUNDUP(sa->sa_len);
652 if (cp) {
653 bcopy((caddr_t)sa, cp, (unsigned)dlen);
654 cp += dlen;
655 }
656 len += dlen;
657 }
658 if (cp == 0 && w != NULL && !second_time) {
659 register struct walkarg *rw = w;
660
661 if (rw->w_req) {
662 if (rw->w_tmemsize < len) {
663 if (rw->w_tmem)
664 free(rw->w_tmem, M_RTABLE);
665 rw->w_tmem = (caddr_t)
666 malloc(len, M_RTABLE, M_NOWAIT);
667 if (rw->w_tmem)
668 rw->w_tmemsize = len;
669 }
670 if (rw->w_tmem) {
671 cp = rw->w_tmem;
672 second_time = 1;
673 goto again;
674 }
675 }
676 }
677 if (cp) {
678 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0;
679
680 rtm->rtm_version = RTM_VERSION;
681 rtm->rtm_type = type;
682 rtm->rtm_msglen = len;
683 }
684 return (len);
685}
686
687/*
688 * This routine is called to generate a message from the routing
689 * socket indicating that a redirect has occured, a routing lookup
690 * has failed, or that a protocol has detected timeouts to a particular
691 * destination.
692 */
693void
694rt_missmsg(type, rtinfo, flags, error)
695 int type, flags, error;
696 register struct rt_addrinfo *rtinfo;
697{
698 register struct rt_msghdr *rtm;
699 register struct mbuf *m;
700 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST];
701
702 if (route_cb.any_count == 0)
703 return;
704 m = rt_msg1(type, rtinfo);
705 if (m == 0)
706 return;
707 rtm = mtod(m, struct rt_msghdr *);
708 rtm->rtm_flags = RTF_DONE | flags;
709 rtm->rtm_errno = error;
710 rtm->rtm_addrs = rtinfo->rti_addrs;
711 route_proto.sp_protocol = sa ? sa->sa_family : 0;
712 raw_input(m, &route_proto, &route_src, &route_dst);
713}
714
715/*
716 * This routine is called to generate a message from the routing
717 * socket indicating that the status of a network interface has changed.
718 */
719void
720rt_ifmsg(ifp)
721 register struct ifnet *ifp;
722{
723 register struct if_msghdr *ifm;
724 struct mbuf *m;
725 struct rt_addrinfo info;
726
727 if (route_cb.any_count == 0)
728 return;
729 bzero((caddr_t)&info, sizeof(info));
730 m = rt_msg1(RTM_IFINFO, &info);
731 if (m == 0)
732 return;
733 ifm = mtod(m, struct if_msghdr *);
734 ifm->ifm_index = ifp->if_index;
735 ifm->ifm_flags = (u_short)ifp->if_flags;
736 ifm->ifm_data = ifp->if_data;
737 ifm->ifm_addrs = 0;
738 route_proto.sp_protocol = 0;
739 raw_input(m, &route_proto, &route_src, &route_dst);
740}
741
742/*
743 * This is called to generate messages from the routing socket
744 * indicating a network interface has had addresses associated with it.
745 * if we ever reverse the logic and replace messages TO the routing
746 * socket indicate a request to configure interfaces, then it will
747 * be unnecessary as the routing socket will automatically generate
748 * copies of it.
749 */
750void
751rt_newaddrmsg(cmd, ifa, error, rt)
752 int cmd, error;
753 register struct ifaddr *ifa;
754 register struct rtentry *rt;
755{
756 struct rt_addrinfo info;
757 struct sockaddr *sa = 0;
758 int pass;
759 struct mbuf *m = 0;
760 struct ifnet *ifp = ifa->ifa_ifp;
761
762 if (route_cb.any_count == 0)
763 return;
764 for (pass = 1; pass < 3; pass++) {
765 bzero((caddr_t)&info, sizeof(info));
766 if ((cmd == RTM_ADD && pass == 1) ||
767 (cmd == RTM_DELETE && pass == 2)) {
768 register struct ifa_msghdr *ifam;
769 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR;
770
771 ifaaddr = sa = ifa->ifa_addr;
772 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
773 netmask = ifa->ifa_netmask;
774 brdaddr = ifa->ifa_dstaddr;
775 if ((m = rt_msg1(ncmd, &info)) == NULL)
776 continue;
777 ifam = mtod(m, struct ifa_msghdr *);
778 ifam->ifam_index = ifp->if_index;
779 ifam->ifam_metric = ifa->ifa_metric;
780 ifam->ifam_flags = ifa->ifa_flags;
781 ifam->ifam_addrs = info.rti_addrs;
782 }
783 if ((cmd == RTM_ADD && pass == 2) ||
784 (cmd == RTM_DELETE && pass == 1)) {
785 register struct rt_msghdr *rtm;
786
787 if (rt == 0)
788 continue;
789 netmask = rt_mask(rt);
790 dst = sa = rt_key(rt);
791 gate = rt->rt_gateway;
792 if ((m = rt_msg1(cmd, &info)) == NULL)
793 continue;
794 rtm = mtod(m, struct rt_msghdr *);
795 rtm->rtm_index = ifp->if_index;
796 rtm->rtm_flags |= rt->rt_flags;
797 rtm->rtm_errno = error;
798 rtm->rtm_addrs = info.rti_addrs;
799 }
800 route_proto.sp_protocol = sa ? sa->sa_family : 0;
801 raw_input(m, &route_proto, &route_src, &route_dst);
802 }
803}
804
805/*
806 * This is the analogue to the rt_newaddrmsg which performs the same
807 * function but for multicast group memberhips. This is easier since
808 * there is no route state to worry about.
809 */
810void
811rt_newmaddrmsg(cmd, ifma)
812 int cmd;
813 struct ifmultiaddr *ifma;
814{
815 struct rt_addrinfo info;
816 struct mbuf *m = 0;
817 struct ifnet *ifp = ifma->ifma_ifp;
818 struct ifma_msghdr *ifmam;
819
820 if (route_cb.any_count == 0)
821 return;
822
823 bzero((caddr_t)&info, sizeof(info));
824 ifaaddr = ifma->ifma_addr;
825 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr;
826 /*
827 * If a link-layer address is present, present it as a ``gateway''
828 * (similarly to how ARP entries, e.g., are presented).
829 */
830 gate = ifma->ifma_lladdr;
831 if ((m = rt_msg1(cmd, &info)) == NULL)
832 return;
833 ifmam = mtod(m, struct ifma_msghdr *);
834 ifmam->ifmam_index = ifp->if_index;
835 ifmam->ifmam_addrs = info.rti_addrs;
836 route_proto.sp_protocol = ifma->ifma_addr->sa_family;
837 raw_input(m, &route_proto, &route_src, &route_dst);
838}
839
840/*
841 * This is used in dumping the kernel table via sysctl().
842 */
843int
844sysctl_dumpentry(rn, vw)
845 struct radix_node *rn;
846 void *vw;
847{
848 register struct walkarg *w = vw;
849 register struct rtentry *rt = (struct rtentry *)rn;
850 int error = 0, size;
851 struct rt_addrinfo info;
852
853 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg))
854 return 0;
855 bzero((caddr_t)&info, sizeof(info));
856 dst = rt_key(rt);
857 gate = rt->rt_gateway;
858 netmask = rt_mask(rt);
859 genmask = rt->rt_genmask;
860 size = rt_msg2(RTM_GET, &info, 0, w);
861 if (w->w_req && w->w_tmem) {
862 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem;
863
864 rtm->rtm_flags = rt->rt_flags;
865 rtm->rtm_use = rt->rt_use;
866 rtm->rtm_rmx = rt->rt_rmx;
867 rtm->rtm_index = rt->rt_ifp->if_index;
868 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0;
869 rtm->rtm_addrs = info.rti_addrs;
870 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size);
871 return (error);
872 }
873 return (error);
874}
875
876int
877sysctl_iflist(af, w)
878 int af;
879 register struct walkarg *w;
880{
881 register struct ifnet *ifp;
882 register struct ifaddr *ifa;
883 struct rt_addrinfo info;
884 int len, error = 0;
885
886 bzero((caddr_t)&info, sizeof(info));
887 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) {
888 if (w->w_arg && w->w_arg != ifp->if_index)
889 continue;
890 ifa = ifp->if_addrhead.tqh_first;
891 ifpaddr = ifa->ifa_addr;
892 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w);
893 ifpaddr = 0;
894 if (w->w_req && w->w_tmem) {
895 register struct if_msghdr *ifm;
896
897 ifm = (struct if_msghdr *)w->w_tmem;
898 ifm->ifm_index = ifp->if_index;
899 ifm->ifm_flags = (u_short)ifp->if_flags;
900 ifm->ifm_data = ifp->if_data;
901 ifm->ifm_addrs = info.rti_addrs;
902 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len);
903 if (error)
904 return (error);
905 }
906 while ((ifa = ifa->ifa_link.tqe_next) != 0) {
907 if (af && af != ifa->ifa_addr->sa_family)
908 continue;
909 ifaaddr = ifa->ifa_addr;
910 netmask = ifa->ifa_netmask;
911 brdaddr = ifa->ifa_dstaddr;
912 len = rt_msg2(RTM_NEWADDR, &info, 0, w);
913 if (w->w_req && w->w_tmem) {
914 register struct ifa_msghdr *ifam;
915
916 ifam = (struct ifa_msghdr *)w->w_tmem;
917 ifam->ifam_index = ifa->ifa_ifp->if_index;
918 ifam->ifam_flags = ifa->ifa_flags;
919 ifam->ifam_metric = ifa->ifa_metric;
920 ifam->ifam_addrs = info.rti_addrs;
921 error = SYSCTL_OUT(w->w_req, w->w_tmem, len);
922 if (error)
923 return (error);
924 }
925 }
926 ifaaddr = netmask = brdaddr = 0;
927 }
928 return (0);
929}
930
931static int
932sysctl_rtsock SYSCTL_HANDLER_ARGS
933{
934 int *name = (int *)arg1;
935 u_int namelen = arg2;
936 register struct radix_node_head *rnh;
937 int i, s, error = EINVAL;
938 u_char af;
939 struct walkarg w;
940
941 name ++;
942 namelen--;
943 if (req->newptr)
944 return (EPERM);
945 if (namelen != 3)
946 return (EINVAL);
947 af = name[0];
948 Bzero(&w, sizeof(w));
949 w.w_op = name[1];
950 w.w_arg = name[2];
951 w.w_req = req;
952
953 s = splnet();
954 switch (w.w_op) {
955
956 case NET_RT_DUMP:
957 case NET_RT_FLAGS:
958 for (i = 1; i <= AF_MAX; i++)
959 if ((rnh = rt_tables[i]) && (af == 0 || af == i) &&
960 (error = rnh->rnh_walktree(rnh,
961 sysctl_dumpentry, &w)))
962 break;
963 break;
964
965 case NET_RT_IFLIST:
966 error = sysctl_iflist(af, &w);
967 }
968 splx(s);
969 if (w.w_tmem)
970 free(w.w_tmem, M_RTABLE);
971 return (error);
972}
973
974SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, "");
975
976/*
977 * Definitions of protocols supported in the ROUTE domain.
978 */
979
980extern struct domain routedomain; /* or at least forward */
981
982static struct protosw routesw[] = {
983{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR,
984 0, route_output, raw_ctlinput, 0,
985 0,
986 raw_init, 0, 0, 0,
987 &route_usrreqs
988}
989};
990
991static struct domain routedomain =
992 { PF_ROUTE, "route", route_init, 0, 0,
993 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] };
994
995DOMAIN_SET(route);