Commit | Line | Data |
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fdd0ed12 | 1 | #ifndef lint |
b7e4f8be | 2 | static char sccsid[] = "@(#)main.c 4.9 (Berkeley) %G%"; |
fdd0ed12 SL |
3 | #endif |
4 | ||
5 | /* | |
6 | * Routing Table Management Daemon | |
7 | */ | |
7fe7fe74 | 8 | #include "defs.h" |
fdd0ed12 | 9 | #include <sys/ioctl.h> |
e2feeea9 SL |
10 | #include <sys/time.h> |
11 | ||
fdd0ed12 | 12 | #include <net/if.h> |
e2feeea9 | 13 | |
fdd0ed12 SL |
14 | #include <errno.h> |
15 | #include <nlist.h> | |
16 | #include <signal.h> | |
fdd0ed12 SL |
17 | |
18 | int supplier = -1; /* process should supply updates */ | |
19 | ||
20 | struct rip *msg = (struct rip *)packet; | |
b7e4f8be | 21 | int hup(); |
fdd0ed12 SL |
22 | |
23 | main(argc, argv) | |
24 | int argc; | |
25 | char *argv[]; | |
26 | { | |
27 | int cc; | |
28 | struct sockaddr from; | |
7fe7fe74 SL |
29 | u_char retry; |
30 | #ifdef COMPAT | |
31 | int snoroute; | |
32 | #endif | |
fdd0ed12 SL |
33 | |
34 | argv0 = argv; | |
fdd0ed12 | 35 | sp = getservbyname("router", "udp"); |
7fe7fe74 SL |
36 | if (sp == NULL) { |
37 | fprintf(stderr, "routed: router/udp: unknown service\n"); | |
fdd0ed12 SL |
38 | exit(1); |
39 | } | |
7fe7fe74 SL |
40 | addr.sin_family = AF_INET; |
41 | addr.sin_port = sp->s_port; | |
42 | s = getsocket(AF_INET, SOCK_DGRAM, &addr); | |
43 | if (s < 0) | |
44 | exit(1); | |
45 | #ifdef COMPAT | |
46 | bzero(&addr, sizeof (addr)); | |
47 | addr.sin_family = AF_INET; | |
48 | addr.sin_port = htons(ntohs(sp->s_port) + 1); | |
49 | snoroute = getsocket(AF_INET, SOCK_DGRAM, &addr); | |
50 | if (snoroute < 0) | |
51 | exit(1); | |
52 | #endif | |
fdd0ed12 SL |
53 | argv++, argc--; |
54 | while (argc > 0 && **argv == '-') { | |
d4b6a849 | 55 | if (strcmp(*argv, "-s") == 0) { |
fdd0ed12 SL |
56 | supplier = 1; |
57 | argv++, argc--; | |
58 | continue; | |
59 | } | |
d4b6a849 | 60 | if (strcmp(*argv, "-q") == 0) { |
fdd0ed12 SL |
61 | supplier = 0; |
62 | argv++, argc--; | |
63 | continue; | |
64 | } | |
d4b6a849 SL |
65 | if (strcmp(*argv, "-t") == 0) { |
66 | tracepackets++; | |
67 | argv++, argc--; | |
68 | continue; | |
69 | } | |
70 | fprintf(stderr, "usage: routed [ -s ] [ -q ] [ -t ]\n"); | |
fdd0ed12 SL |
71 | exit(1); |
72 | } | |
d4b6a849 SL |
73 | #ifndef DEBUG |
74 | if (!tracepackets) { | |
75 | int t; | |
76 | ||
77 | if (fork()) | |
78 | exit(0); | |
7620381d SL |
79 | for (t = 0; t < 20; t++) |
80 | if (t != s) | |
81 | #ifdef COMPAT | |
55d340a4 | 82 | if (t != snoroute) |
7620381d SL |
83 | #endif |
84 | (void) close(cc); | |
d4b6a849 SL |
85 | (void) open("/", 0); |
86 | (void) dup2(0, 1); | |
87 | (void) dup2(0, 2); | |
88 | t = open("/dev/tty", 2); | |
89 | if (t >= 0) { | |
90 | ioctl(t, TIOCNOTTY, (char *)0); | |
91 | (void) close(t); | |
92 | } | |
93 | } | |
94 | #endif | |
7fe7fe74 SL |
95 | /* |
96 | * Any extra argument is considered | |
97 | * a tracing log file. | |
98 | */ | |
99 | if (argc > 0) | |
100 | traceon(*argv); | |
fdd0ed12 SL |
101 | /* |
102 | * Collect an initial view of the world by | |
103 | * snooping in the kernel and the gateway kludge | |
104 | * file. Then, send a request packet on all | |
105 | * directly connected networks to find out what | |
106 | * everyone else thinks. | |
107 | */ | |
108 | rtinit(); | |
109 | gwkludge(); | |
110 | ifinit(); | |
111 | if (supplier < 0) | |
112 | supplier = 0; | |
113 | msg->rip_cmd = RIPCMD_REQUEST; | |
55d340a4 | 114 | msg->rip_vers = RIPVERSION; |
fdd0ed12 SL |
115 | msg->rip_nets[0].rip_dst.sa_family = AF_UNSPEC; |
116 | msg->rip_nets[0].rip_metric = HOPCNT_INFINITY; | |
55d340a4 SL |
117 | msg->rip_nets[0].rip_dst.sa_family = htons(AF_UNSPEC); |
118 | msg->rip_nets[0].rip_metric = htonl(HOPCNT_INFINITY); | |
fdd0ed12 | 119 | toall(sendmsg); |
ce5e9df4 | 120 | signal(SIGALRM, timer); |
b7e4f8be | 121 | signal(SIGHUP, hup); |
fdd0ed12 SL |
122 | timer(); |
123 | ||
fdd0ed12 SL |
124 | for (;;) { |
125 | int ibits; | |
126 | register int n; | |
127 | ||
7fe7fe74 SL |
128 | ibits = 1 << s; |
129 | #ifdef COMPAT | |
130 | ibits |= 1 << snoroute; | |
131 | #endif | |
132 | n = select(20, &ibits, 0, 0, 0); | |
fdd0ed12 SL |
133 | if (n < 0) |
134 | continue; | |
135 | if (ibits & (1 << s)) | |
136 | process(s); | |
7fe7fe74 | 137 | #ifdef COMPAT |
fdd0ed12 SL |
138 | if (ibits & (1 << snoroute)) |
139 | process(snoroute); | |
7fe7fe74 SL |
140 | #endif |
141 | /* handle ICMP redirects */ | |
fdd0ed12 SL |
142 | } |
143 | } | |
144 | ||
145 | process(fd) | |
146 | int fd; | |
147 | { | |
fdd0ed12 | 148 | struct sockaddr from; |
ce5e9df4 | 149 | int fromlen = sizeof (from), cc, omask; |
fdd0ed12 | 150 | |
7fe7fe74 | 151 | cc = recvfrom(fd, packet, sizeof (packet), 0, &from, &fromlen); |
fdd0ed12 SL |
152 | if (cc <= 0) { |
153 | if (cc < 0 && errno != EINTR) | |
7fe7fe74 | 154 | perror("recvfrom"); |
fdd0ed12 SL |
155 | return; |
156 | } | |
7fe7fe74 SL |
157 | if (fromlen != sizeof (struct sockaddr_in)) |
158 | return; | |
ce5e9df4 SL |
159 | #define mask(s) (1<<((s)-1)) |
160 | omask = sigblock(mask(SIGALRM)); | |
fdd0ed12 | 161 | rip_input(&from, cc); |
ce5e9df4 | 162 | sigsetmask(omask); |
fdd0ed12 | 163 | } |
7fe7fe74 SL |
164 | |
165 | getsocket(domain, type, sin) | |
166 | int domain, type; | |
167 | struct sockaddr_in *sin; | |
168 | { | |
169 | int retry, s; | |
170 | ||
171 | retry = 1; | |
172 | while ((s = socket(domain, type, 0, 0)) < 0 && retry) { | |
173 | perror("socket"); | |
174 | sleep(5 * retry); | |
175 | retry <<= 1; | |
176 | } | |
177 | if (retry == 0) | |
178 | return (-1); | |
179 | while (bind(s, sin, sizeof (*sin), 0) < 0 && retry) { | |
180 | perror("bind"); | |
181 | sleep(5 * retry); | |
182 | retry <<= 1; | |
183 | } | |
184 | if (retry == 0) | |
185 | return (-1); | |
186 | return (s); | |
187 | } |