Commit | Line | Data |
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5ff67f98 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1983 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
fdd0ed12 | 13 | #ifndef lint |
7892134c | 14 | static char sccsid[] = "@(#)main.c 5.11 (Berkeley) %G%"; |
5ff67f98 | 15 | #endif not lint |
fdd0ed12 SL |
16 | |
17 | /* | |
18 | * Routing Table Management Daemon | |
19 | */ | |
7fe7fe74 | 20 | #include "defs.h" |
fdd0ed12 | 21 | #include <sys/ioctl.h> |
e2feeea9 SL |
22 | #include <sys/time.h> |
23 | ||
fdd0ed12 | 24 | #include <net/if.h> |
e2feeea9 | 25 | |
fdd0ed12 | 26 | #include <errno.h> |
fdd0ed12 | 27 | #include <signal.h> |
69b7ef61 | 28 | #include <syslog.h> |
fdd0ed12 SL |
29 | |
30 | int supplier = -1; /* process should supply updates */ | |
d002aa8c | 31 | int gateway = 0; /* 1 if we are a gateway to parts beyond */ |
7892134c | 32 | int debug = 0; |
fdd0ed12 SL |
33 | |
34 | struct rip *msg = (struct rip *)packet; | |
7892134c | 35 | int hup(), rtdeleteall(); |
fdd0ed12 SL |
36 | |
37 | main(argc, argv) | |
38 | int argc; | |
39 | char *argv[]; | |
40 | { | |
41 | int cc; | |
42 | struct sockaddr from; | |
7fe7fe74 | 43 | u_char retry; |
fdd0ed12 SL |
44 | |
45 | argv0 = argv; | |
a349306d | 46 | openlog("routed", LOG_PID | LOG_ODELAY, LOG_DAEMON); |
bb3e151c | 47 | setlogmask(LOG_WARNING); |
fdd0ed12 | 48 | sp = getservbyname("router", "udp"); |
7fe7fe74 SL |
49 | if (sp == NULL) { |
50 | fprintf(stderr, "routed: router/udp: unknown service\n"); | |
fdd0ed12 SL |
51 | exit(1); |
52 | } | |
7fe7fe74 SL |
53 | addr.sin_family = AF_INET; |
54 | addr.sin_port = sp->s_port; | |
55 | s = getsocket(AF_INET, SOCK_DGRAM, &addr); | |
56 | if (s < 0) | |
57 | exit(1); | |
fdd0ed12 SL |
58 | argv++, argc--; |
59 | while (argc > 0 && **argv == '-') { | |
d4b6a849 | 60 | if (strcmp(*argv, "-s") == 0) { |
fdd0ed12 SL |
61 | supplier = 1; |
62 | argv++, argc--; | |
63 | continue; | |
64 | } | |
d4b6a849 | 65 | if (strcmp(*argv, "-q") == 0) { |
fdd0ed12 SL |
66 | supplier = 0; |
67 | argv++, argc--; | |
68 | continue; | |
69 | } | |
d4b6a849 SL |
70 | if (strcmp(*argv, "-t") == 0) { |
71 | tracepackets++; | |
bb3e151c | 72 | setlogmask(LOG_DEBUG); |
17fe297f MK |
73 | argv++, argc--; |
74 | continue; | |
75 | } | |
76 | if (strcmp(*argv, "-d") == 0) { | |
7892134c | 77 | debug++; |
bb3e151c | 78 | setlogmask(LOG_DEBUG); |
d4b6a849 SL |
79 | argv++, argc--; |
80 | continue; | |
81 | } | |
5562f0a3 MK |
82 | if (strcmp(*argv, "-g") == 0) { |
83 | gateway = 1; | |
84 | argv++, argc--; | |
85 | continue; | |
86 | } | |
5562f0a3 | 87 | fprintf(stderr, |
d002aa8c | 88 | "usage: routed [ -s ] [ -q ] [ -t ] [ -g ]\n"); |
fdd0ed12 SL |
89 | exit(1); |
90 | } | |
7892134c | 91 | if (tracepackets == 0 && debug == 0) { |
d4b6a849 SL |
92 | int t; |
93 | ||
94 | if (fork()) | |
95 | exit(0); | |
7620381d SL |
96 | for (t = 0; t < 20; t++) |
97 | if (t != s) | |
2b478949 | 98 | (void) close(t); |
d4b6a849 SL |
99 | (void) open("/", 0); |
100 | (void) dup2(0, 1); | |
101 | (void) dup2(0, 2); | |
102 | t = open("/dev/tty", 2); | |
103 | if (t >= 0) { | |
104 | ioctl(t, TIOCNOTTY, (char *)0); | |
105 | (void) close(t); | |
106 | } | |
107 | } | |
7fe7fe74 SL |
108 | /* |
109 | * Any extra argument is considered | |
110 | * a tracing log file. | |
111 | */ | |
112 | if (argc > 0) | |
113 | traceon(*argv); | |
fdd0ed12 SL |
114 | /* |
115 | * Collect an initial view of the world by | |
d002aa8c | 116 | * checking the interface configuration and the gateway kludge |
fdd0ed12 SL |
117 | * file. Then, send a request packet on all |
118 | * directly connected networks to find out what | |
119 | * everyone else thinks. | |
120 | */ | |
121 | rtinit(); | |
fdd0ed12 | 122 | ifinit(); |
34894a1d | 123 | gwkludge(); |
d002aa8c MK |
124 | if (gateway > 0) |
125 | rtdefault(); | |
fdd0ed12 SL |
126 | if (supplier < 0) |
127 | supplier = 0; | |
128 | msg->rip_cmd = RIPCMD_REQUEST; | |
55d340a4 | 129 | msg->rip_vers = RIPVERSION; |
fdd0ed12 SL |
130 | msg->rip_nets[0].rip_dst.sa_family = AF_UNSPEC; |
131 | msg->rip_nets[0].rip_metric = HOPCNT_INFINITY; | |
55d340a4 SL |
132 | msg->rip_nets[0].rip_dst.sa_family = htons(AF_UNSPEC); |
133 | msg->rip_nets[0].rip_metric = htonl(HOPCNT_INFINITY); | |
fdd0ed12 | 134 | toall(sendmsg); |
ce5e9df4 | 135 | signal(SIGALRM, timer); |
b7e4f8be | 136 | signal(SIGHUP, hup); |
69b7ef61 | 137 | signal(SIGTERM, hup); |
7892134c | 138 | signal(SIGINT, rtdeleteall); |
fdd0ed12 SL |
139 | timer(); |
140 | ||
fdd0ed12 SL |
141 | for (;;) { |
142 | int ibits; | |
143 | register int n; | |
144 | ||
7fe7fe74 | 145 | ibits = 1 << s; |
7fe7fe74 | 146 | n = select(20, &ibits, 0, 0, 0); |
fdd0ed12 SL |
147 | if (n < 0) |
148 | continue; | |
149 | if (ibits & (1 << s)) | |
150 | process(s); | |
7fe7fe74 | 151 | /* handle ICMP redirects */ |
fdd0ed12 SL |
152 | } |
153 | } | |
154 | ||
155 | process(fd) | |
156 | int fd; | |
157 | { | |
fdd0ed12 | 158 | struct sockaddr from; |
ce5e9df4 | 159 | int fromlen = sizeof (from), cc, omask; |
fdd0ed12 | 160 | |
7fe7fe74 | 161 | cc = recvfrom(fd, packet, sizeof (packet), 0, &from, &fromlen); |
fdd0ed12 SL |
162 | if (cc <= 0) { |
163 | if (cc < 0 && errno != EINTR) | |
7fe7fe74 | 164 | perror("recvfrom"); |
fdd0ed12 SL |
165 | return; |
166 | } | |
7fe7fe74 SL |
167 | if (fromlen != sizeof (struct sockaddr_in)) |
168 | return; | |
2b478949 | 169 | omask = sigblock(sigmask(SIGALRM)); |
fdd0ed12 | 170 | rip_input(&from, cc); |
ce5e9df4 | 171 | sigsetmask(omask); |
fdd0ed12 | 172 | } |
7fe7fe74 SL |
173 | |
174 | getsocket(domain, type, sin) | |
175 | int domain, type; | |
176 | struct sockaddr_in *sin; | |
177 | { | |
3d42e160 | 178 | int s, on = 1; |
7fe7fe74 | 179 | |
9fe072d4 | 180 | if ((s = socket(domain, type, 0)) < 0) { |
7fe7fe74 | 181 | perror("socket"); |
69b7ef61 | 182 | syslog(LOG_ERR, "socket: %m"); |
7fe7fe74 | 183 | return (-1); |
69b7ef61 MK |
184 | } |
185 | if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) { | |
186 | syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m"); | |
3d42e160 MK |
187 | close(s); |
188 | return (-1); | |
69b7ef61 | 189 | } |
34894a1d MK |
190 | on = 48*1024; |
191 | if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &on, sizeof (on)) < 0) | |
192 | syslog(LOG_ERR, "setsockopt SO_RCVBUF: %m"); | |
3d42e160 | 193 | if (bind(s, sin, sizeof (*sin), 0) < 0) { |
7fe7fe74 | 194 | perror("bind"); |
69b7ef61 | 195 | syslog(LOG_ERR, "bind: %m"); |
3d42e160 | 196 | close(s); |
7fe7fe74 | 197 | return (-1); |
69b7ef61 | 198 | } |
7fe7fe74 SL |
199 | return (s); |
200 | } |