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[FreeBSD/releng/10.0.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  * $FreeBSD$
39  */
40
41 #ifndef lint
42 static const char sccsid[] = "@(#)startup.c     8.1 (Berkeley) 6/5/93";
43 #endif /* not lint */
44
45 /*
46  * Routing Table Management Daemon
47  */
48 #include "defs.h"
49
50 #include <sys/param.h>
51 #include <sys/ioctl.h>
52 #include <sys/sysctl.h>
53 #include <sys/time.h>
54
55 #include <net/if.h>
56 #include <net/if_dl.h>
57
58 #include <errno.h>
59 #include <nlist.h>
60 #include <search.h>
61 #include <stdlib.h>
62
63 struct  interface *ifnet;
64 int     lookforinterfaces = 1;
65 int     performnlist = 1;
66 int     gateway = 0;
67 int     externalinterfaces = 0;         /* # of remote and local interfaces */
68
69 void
70 quit(s)
71         char *s;
72 {
73         int sverrno = errno;
74
75         (void) fprintf(stderr, "IPXroute: ");
76         if (s)
77                 (void) fprintf(stderr, "%s: ", s);
78         (void) fprintf(stderr, "%s\n", strerror(sverrno));
79         exit(1);
80         /* NOTREACHED */
81 }
82
83 struct rt_addrinfo info;
84 /* XXX Sleazy use of local variables throughout file, warning!!!! */
85 #define netmask info.rti_info[RTAX_NETMASK]
86 #define ifaaddr info.rti_info[RTAX_IFA]
87 #define brdaddr info.rti_info[RTAX_BRD]
88
89 void
90 rt_xaddrs(cp, cplim, rtinfo)
91         register caddr_t cp, cplim;
92         register struct rt_addrinfo *rtinfo;
93 {
94         register struct sockaddr *sa;
95         register int i;
96
97         bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
98         for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
99                 if ((rtinfo->rti_addrs & (1 << i)) == 0)
100                         continue;
101                 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
102                 cp += SA_SIZE(sa);
103         }
104 }
105
106 /*
107  * Find the network interfaces which have configured themselves.
108  * If the interface is present but not yet up (for example an
109  * ARPANET IMP), set the lookforinterfaces flag so we'll
110  * come back later and look again.
111  */
112 void
113 ifinit(void)
114 {
115         struct interface ifs, *ifp;
116         size_t needed;
117         int mib[6], no_ipxaddr = 0, flags = 0;
118         char *buf, *cplim, *cp;
119         register struct if_msghdr *ifm;
120         register struct ifa_msghdr *ifam;
121         struct sockaddr_dl *sdl = 0;
122
123         mib[0] = CTL_NET;
124         mib[1] = PF_ROUTE;
125         mib[2] = 0;
126         mib[3] = AF_IPX;
127         mib[4] = NET_RT_IFLIST;
128         mib[5] = 0;
129         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
130                 quit("route-sysctl-estimate");
131         if ((buf = malloc(needed)) == NULL)
132                 quit("malloc");
133         if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
134         lookforinterfaces = 0;
135         cplim = buf + needed;
136         for (cp = buf; cp < cplim; cp += ifm->ifm_msglen) {
137                 ifm = (struct if_msghdr *)cp;
138                 if (ifm->ifm_type == RTM_IFINFO) {
139                         bzero(&ifs, sizeof(ifs));
140                         ifs.int_flags = flags = ifm->ifm_flags | IFF_INTERFACE;
141                         if ((flags & IFF_UP) == 0 || no_ipxaddr)
142                                 lookforinterfaces = 1;
143                         sdl = (struct sockaddr_dl *) (ifm + 1);
144                         sdl->sdl_data[sdl->sdl_nlen] = 0;
145                         no_ipxaddr = 1;
146                         continue;
147                 }
148                 if (ifm->ifm_type != RTM_NEWADDR)
149                         quit("ifinit: out of sync");
150                 if ((flags & IFF_UP) == 0)
151                         continue;
152                 ifam = (struct ifa_msghdr *)ifm;
153                 info.rti_addrs = ifam->ifam_addrs;
154                 rt_xaddrs((char *)(ifam + 1), cp + ifam->ifam_msglen, &info);
155                 if (ifaaddr == 0) {
156                         syslog(LOG_ERR, "%s: (get addr)", sdl->sdl_data);
157                         continue;
158                 }
159                 ifs.int_addr = *ifaaddr;
160                 if (ifs.int_addr.sa_family != AF_IPX)
161                         continue;
162                 no_ipxaddr = 0;
163                 if (ifs.int_flags & IFF_POINTOPOINT) {
164                         if (brdaddr == 0) {
165                                 syslog(LOG_ERR, "%s: (get dstaddr)",
166                                         sdl->sdl_data);
167                                 continue;
168                         }
169                         if (brdaddr->sa_family == AF_UNSPEC) {
170                                 lookforinterfaces = 1;
171                                 continue;
172                         }
173                         ifs.int_dstaddr = *brdaddr;
174                 }
175                 if (ifs.int_flags & IFF_BROADCAST) {
176                         if (brdaddr == 0) {
177                                 syslog(LOG_ERR, "%s: (get broadaddr)",
178                                         sdl->sdl_data);
179                                 continue;
180                         }
181                         ifs.int_dstaddr = *brdaddr;
182                 }
183                 if (ifs.int_flags & IFF_LOOPBACK) {
184                         ifs.int_dstaddr = ifs.int_addr;
185                 }
186                 /* 
187                  * already known to us? 
188                  * what makes a POINTOPOINT if unique is its dst addr,
189                  * NOT its source address 
190                  */
191                 if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
192                         if_ifwithdstaddr(&ifs.int_dstaddr)) ||
193                         ( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
194                         if_ifwithaddr(&ifs.int_addr)))
195                         continue;
196                 ifp = (struct interface *)
197                         malloc(sdl->sdl_nlen + 1 + sizeof(ifs));
198                 if (ifp == 0) {
199                         syslog(LOG_ERR, "IPXrouted: out of memory\n");
200                         lookforinterfaces = 1;
201                         break;
202                 }
203                 *ifp = ifs;
204                 /*
205                  * Count the # of directly connected networks
206                  * and point to point links which aren't looped
207                  * back to ourself.  This is used below to
208                  * decide if we should be a routing ``supplier''.
209                  */
210                 if ((ifs.int_flags & IFF_POINTOPOINT) == 0 ||
211                     if_ifwithaddr(&ifs.int_dstaddr) == 0)
212                         externalinterfaces++;
213                 /*
214                  * If we have a point-to-point link, we want to act
215                  * as a supplier even if it's our only interface,
216                  * as that's the only way our peer on the other end
217                  * can tell that the link is up.
218                  */
219                 if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
220                         supplier = 1;
221                 ifp->int_name = (char *)(ifp + 1);
222                 strcpy(ifp->int_name, sdl->sdl_data);
223
224                 ifp->int_metric = ifam->ifam_metric;
225                 ifp->int_next = ifnet;
226                 ifnet = ifp;
227                 traceinit(ifp);
228                 addrouteforif(ifp);
229         }
230         if (externalinterfaces > 1 && supplier < 0)
231                 supplier = 1;
232         free(buf);
233 }
234
235 void
236 addrouteforif(ifp)
237         struct interface *ifp;
238 {
239         struct sockaddr_ipx net;
240         struct sockaddr *dst;
241         struct rt_entry *rt;
242
243         if (ifp->int_flags & IFF_POINTOPOINT) {
244                 int (*match)();
245                 register struct interface *ifp2 = ifnet;
246                 
247                 dst = &ifp->int_dstaddr;
248
249                 /* Search for interfaces with the same net */
250                 ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
251                 match = afswitch[dst->sa_family].af_netmatch;
252                 if (match)
253                 for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
254                         if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
255                                 continue;
256                         if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
257                                 insque(&ifp2->int_sq,&ifp->int_sq);
258                                 break;
259                         }
260                 }
261         } else {
262                 bzero(&net, sizeof(net));
263                 net.sipx_family = AF_IPX;
264                 net.sipx_len = sizeof (net);
265                 net.sipx_addr.x_net = satoipx_addr(ifp->int_broadaddr).x_net;
266                 dst = (struct sockaddr *)&net;
267         }
268         rt = rtlookup(dst);
269         if (rt)
270                 rtdelete(rt);
271         if (tracing)
272                 fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
273         if (ifp->int_transitions++ > 0)
274                 syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
275         rtadd(dst, &ifp->int_addr, ifp->int_metric, 0,
276                 ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
277 }
278