Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / usr.sbin / IPXrouted / startup.c
1 /*
2  * Copyright (c) 1985, 1993
3  *      The Regents of the University of California.  All rights reserved.
4  *
5  * Copyright (c) 1995 John Hay.  All rights reserved.
6  *
7  * This file includes significant work done at Cornell University by
8  * Bill Nesheim.  That work included by permission.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. All advertising materials mentioning features or use of this software
19  *    must display the following acknowledgement:
20  *      This product includes software developed by the University of
21  *      California, Berkeley and its contributors.
22  * 4. Neither the name of the University nor the names of its contributors
23  *    may be used to endorse or promote products derived from this software
24  *    without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36  * SUCH DAMAGE.
37  *
38  * $FreeBSD: src/usr.sbin/IPXrouted/startup.c,v 1.8.2.1 2000/07/01 10:46:25 ps Exp $
39  * $DragonFly: src/usr.sbin/IPXrouted/startup.c,v 1.2 2003/06/17 04:29:52 dillon Exp $
40  *
41  * @(#)startup.c        8.1 (Berkeley) 6/5/93
42  */
43
44 /*
45  * Routing Table Management Daemon
46  */
47 #include "defs.h"
48
49 #include <sys/param.h>
50 #include <sys/ioctl.h>
51 #include <sys/sysctl.h>
52 #include <sys/time.h>
53
54 #include <net/if.h>
55 #include <net/if_dl.h>
56
57 #include <errno.h>
58 #include <nlist.h>
59 #include <stdlib.h>
60
61 struct  interface *ifnet;
62 int     lookforinterfaces = 1;
63 int     performnlist = 1;
64 int     gateway = 0;
65 int     externalinterfaces = 0;         /* # of remote and local interfaces */
66
67 void
68 quit(s)
69         char *s;
70 {
71         int sverrno = errno;
72
73         (void) fprintf(stderr, "IPXroute: ");
74         if (s)
75                 (void) fprintf(stderr, "%s: ", s);
76         (void) fprintf(stderr, "%s\n", strerror(sverrno));
77         exit(1);
78         /* NOTREACHED */
79 }
80
81 struct rt_addrinfo info;
82 /* Sleazy use of local variables throughout file, warning!!!! */
83 #define netmask info.rti_info[RTAX_NETMASK]
84 #define ifaaddr info.rti_info[RTAX_IFA]
85 #define brdaddr info.rti_info[RTAX_BRD]
86
87 #define ROUNDUP(a) \
88         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
89 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
90
91 void
92 rt_xaddrs(cp, cplim, rtinfo)
93         register caddr_t cp, cplim;
94         register struct rt_addrinfo *rtinfo;
95 {
96         register struct sockaddr *sa;
97         register int i;
98
99         bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
100         for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
101                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
102                         continue;
103                 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
104                 ADVANCE(cp, sa);
105         }
106 }
107
108 /*
109  * Find the network interfaces which have configured themselves.
110  * If the interface is present but not yet up (for example an
111  * ARPANET IMP), set the lookforinterfaces flag so we'll
112  * come back later and look again.
113  */
114 void
115 ifinit(void)
116 {
117         struct interface ifs, *ifp;
118         size_t needed;
119         int mib[6], no_ipxaddr = 0, flags = 0;
120         char *buf, *cplim, *cp;
121         register struct if_msghdr *ifm;
122         register struct ifa_msghdr *ifam;
123         struct sockaddr_dl *sdl = 0;
124
125         mib[0] = CTL_NET;
126         mib[1] = PF_ROUTE;
127         mib[2] = 0;
128         mib[3] = AF_IPX;
129         mib[4] = NET_RT_IFLIST;
130         mib[5] = 0;
131         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
132                 quit("route-sysctl-estimate");
133         if ((buf = malloc(needed)) == NULL)
134                 quit("malloc");
135         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
136         lookforinterfaces = 0;
137         cplim = buf + needed;
138         for (cp = buf; cp < cplim; cp += ifm->ifm_msglen) {
139                 ifm = (struct if_msghdr *)cp;
140                 if (ifm->ifm_type == RTM_IFINFO) {
141                         bzero(&ifs, sizeof(ifs));
142                         ifs.int_flags = flags = ifm->ifm_flags | IFF_INTERFACE;
143                         if ((flags & IFF_UP) == 0 || no_ipxaddr)
144                                 lookforinterfaces = 1;
145                         sdl = (struct sockaddr_dl *) (ifm + 1);
146                         sdl->sdl_data[sdl->sdl_nlen] = 0;
147                         no_ipxaddr = 1;
148                         continue;
149                 }
150                 if (ifm->ifm_type != RTM_NEWADDR)
151                         quit("ifinit: out of sync");
152                 if ((flags & IFF_UP) == 0)
153                         continue;
154                 ifam = (struct ifa_msghdr *)ifm;
155                 info.rti_addrs = ifam->ifam_addrs;
156                 rt_xaddrs((char *)(ifam + 1), cp + ifam->ifam_msglen, &info);
157                 if (ifaaddr == 0) {
158                         syslog(LOG_ERR, "%s: (get addr)", sdl->sdl_data);
159                         continue;
160                 }
161                 ifs.int_addr = *ifaaddr;
162                 if (ifs.int_addr.sa_family != AF_IPX)
163                         continue;
164                 no_ipxaddr = 0;
165                 if (ifs.int_flags & IFF_POINTOPOINT) {
166                         if (brdaddr == 0) {
167                                 syslog(LOG_ERR, "%s: (get dstaddr)",
168                                         sdl->sdl_data);
169                                 continue;
170                         }
171                         if (brdaddr->sa_family == AF_UNSPEC) {
172                                 lookforinterfaces = 1;
173                                 continue;
174                         }
175                         ifs.int_dstaddr = *brdaddr;
176                 }
177                 if (ifs.int_flags & IFF_BROADCAST) {
178                         if (brdaddr == 0) {
179                                 syslog(LOG_ERR, "%s: (get broadaddr)",
180                                         sdl->sdl_data);
181                                 continue;
182                         }
183                         ifs.int_dstaddr = *brdaddr;
184                 }
185                 if (ifs.int_flags & IFF_LOOPBACK) {
186                         ifs.int_dstaddr = ifs.int_addr;
187                 }
188                 /* 
189                  * already known to us? 
190                  * what makes a POINTOPOINT if unique is its dst addr,
191                  * NOT its source address 
192                  */
193                 if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
194                         if_ifwithdstaddr(&ifs.int_dstaddr)) ||
195                         ( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
196                         if_ifwithaddr(&ifs.int_addr)))
197                         continue;
198                 ifp = (struct interface *)
199                         malloc(sdl->sdl_nlen + 1 + sizeof(ifs));
200                 if (ifp == 0) {
201                         syslog(LOG_ERR, "IPXrouted: out of memory\n");
202                         lookforinterfaces = 1;
203                         break;
204                 }
205                 *ifp = ifs;
206                 /*
207                  * Count the # of directly connected networks
208                  * and point to point links which aren't looped
209                  * back to ourself.  This is used below to
210                  * decide if we should be a routing ``supplier''.
211                  */
212                 if ((ifs.int_flags & IFF_POINTOPOINT) == 0 ||
213                     if_ifwithaddr(&ifs.int_dstaddr) == 0)
214                         externalinterfaces++;
215                 /*
216                  * If we have a point-to-point link, we want to act
217                  * as a supplier even if it's our only interface,
218                  * as that's the only way our peer on the other end
219                  * can tell that the link is up.
220                  */
221                 if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
222                         supplier = 1;
223                 ifp->int_name = (char *)(ifp + 1);
224                 strcpy(ifp->int_name, sdl->sdl_data);
225
226                 ifp->int_metric = ifam->ifam_metric;
227                 ifp->int_next = ifnet;
228                 ifnet = ifp;
229                 traceinit(ifp);
230                 addrouteforif(ifp);
231         }
232         if (externalinterfaces > 1 && supplier < 0)
233                 supplier = 1;
234         free(buf);
235 }
236
237 void
238 addrouteforif(ifp)
239         struct interface *ifp;
240 {
241         struct sockaddr_ipx net;
242         struct sockaddr *dst;
243         struct rt_entry *rt;
244
245         if (ifp->int_flags & IFF_POINTOPOINT) {
246                 int (*match)();
247                 register struct interface *ifp2 = ifnet;
248                 
249                 dst = &ifp->int_dstaddr;
250
251                 /* Search for interfaces with the same net */
252                 ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
253                 match = afswitch[dst->sa_family].af_netmatch;
254                 if (match)
255                 for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
256                         if (ifp->int_flags & IFF_POINTOPOINT == 0)
257                                 continue;
258                         if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
259                                 insque(&ifp2->int_sq,&ifp->int_sq);
260                                 break;
261                         }
262                 }
263         } else {
264                 bzero(&net, sizeof(net));
265                 net.sipx_family = AF_IPX;
266                 net.sipx_len = sizeof (net);
267                 net.sipx_addr.x_net = satoipx_addr(ifp->int_broadaddr).x_net;
268                 dst = (struct sockaddr *)&net;
269         }
270         rt = rtlookup(dst);
271         if (rt)
272                 rtdelete(rt);
273         if (tracing)
274                 fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
275         if (ifp->int_transitions++ > 0)
276                 syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
277         rtadd(dst, &ifp->int_addr, ifp->int_metric, 0,
278                 ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
279 }
280