Commit | Line | Data |
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fdd0ed12 | 1 | #ifndef lint |
0f4556f1 | 2 | static char sccsid[] = "@(#)main.c 4.8 (Berkeley) 7/1/83"; |
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; | |
21 | ||
22 | main(argc, argv) | |
23 | int argc; | |
24 | char *argv[]; | |
25 | { | |
26 | int cc; | |
27 | struct sockaddr from; | |
7fe7fe74 SL |
28 | u_char retry; |
29 | #ifdef COMPAT | |
30 | int snoroute; | |
31 | #endif | |
fdd0ed12 SL |
32 | |
33 | argv0 = argv; | |
fdd0ed12 | 34 | sp = getservbyname("router", "udp"); |
7fe7fe74 SL |
35 | if (sp == NULL) { |
36 | fprintf(stderr, "routed: router/udp: unknown service\n"); | |
fdd0ed12 SL |
37 | exit(1); |
38 | } | |
7fe7fe74 SL |
39 | addr.sin_family = AF_INET; |
40 | addr.sin_port = sp->s_port; | |
41 | s = getsocket(AF_INET, SOCK_DGRAM, &addr); | |
42 | if (s < 0) | |
43 | exit(1); | |
44 | #ifdef COMPAT | |
45 | bzero(&addr, sizeof (addr)); | |
46 | addr.sin_family = AF_INET; | |
47 | addr.sin_port = htons(ntohs(sp->s_port) + 1); | |
48 | snoroute = getsocket(AF_INET, SOCK_DGRAM, &addr); | |
49 | if (snoroute < 0) | |
50 | exit(1); | |
51 | #endif | |
fdd0ed12 SL |
52 | argv++, argc--; |
53 | while (argc > 0 && **argv == '-') { | |
d4b6a849 | 54 | if (strcmp(*argv, "-s") == 0) { |
fdd0ed12 SL |
55 | supplier = 1; |
56 | argv++, argc--; | |
57 | continue; | |
58 | } | |
d4b6a849 | 59 | if (strcmp(*argv, "-q") == 0) { |
fdd0ed12 SL |
60 | supplier = 0; |
61 | argv++, argc--; | |
62 | continue; | |
63 | } | |
d4b6a849 SL |
64 | if (strcmp(*argv, "-t") == 0) { |
65 | tracepackets++; | |
66 | argv++, argc--; | |
67 | continue; | |
68 | } | |
69 | fprintf(stderr, "usage: routed [ -s ] [ -q ] [ -t ]\n"); | |
fdd0ed12 SL |
70 | exit(1); |
71 | } | |
d4b6a849 SL |
72 | #ifndef DEBUG |
73 | if (!tracepackets) { | |
74 | int t; | |
75 | ||
76 | if (fork()) | |
77 | exit(0); | |
7620381d SL |
78 | for (t = 0; t < 20; t++) |
79 | if (t != s) | |
80 | #ifdef COMPAT | |
55d340a4 | 81 | if (t != snoroute) |
7620381d SL |
82 | #endif |
83 | (void) close(cc); | |
d4b6a849 SL |
84 | (void) open("/", 0); |
85 | (void) dup2(0, 1); | |
86 | (void) dup2(0, 2); | |
87 | t = open("/dev/tty", 2); | |
88 | if (t >= 0) { | |
89 | ioctl(t, TIOCNOTTY, (char *)0); | |
90 | (void) close(t); | |
91 | } | |
92 | } | |
93 | #endif | |
7fe7fe74 SL |
94 | /* |
95 | * Any extra argument is considered | |
96 | * a tracing log file. | |
97 | */ | |
98 | if (argc > 0) | |
99 | traceon(*argv); | |
fdd0ed12 SL |
100 | /* |
101 | * Collect an initial view of the world by | |
102 | * snooping in the kernel and the gateway kludge | |
103 | * file. Then, send a request packet on all | |
104 | * directly connected networks to find out what | |
105 | * everyone else thinks. | |
106 | */ | |
107 | rtinit(); | |
108 | gwkludge(); | |
109 | ifinit(); | |
110 | if (supplier < 0) | |
111 | supplier = 0; | |
112 | msg->rip_cmd = RIPCMD_REQUEST; | |
55d340a4 | 113 | msg->rip_vers = RIPVERSION; |
fdd0ed12 SL |
114 | msg->rip_nets[0].rip_dst.sa_family = AF_UNSPEC; |
115 | msg->rip_nets[0].rip_metric = HOPCNT_INFINITY; | |
55d340a4 SL |
116 | msg->rip_nets[0].rip_dst.sa_family = htons(AF_UNSPEC); |
117 | msg->rip_nets[0].rip_metric = htonl(HOPCNT_INFINITY); | |
fdd0ed12 | 118 | toall(sendmsg); |
ce5e9df4 | 119 | signal(SIGALRM, timer); |
fdd0ed12 SL |
120 | timer(); |
121 | ||
fdd0ed12 SL |
122 | for (;;) { |
123 | int ibits; | |
124 | register int n; | |
125 | ||
7fe7fe74 SL |
126 | ibits = 1 << s; |
127 | #ifdef COMPAT | |
128 | ibits |= 1 << snoroute; | |
129 | #endif | |
130 | n = select(20, &ibits, 0, 0, 0); | |
fdd0ed12 SL |
131 | if (n < 0) |
132 | continue; | |
133 | if (ibits & (1 << s)) | |
134 | process(s); | |
7fe7fe74 | 135 | #ifdef COMPAT |
fdd0ed12 SL |
136 | if (ibits & (1 << snoroute)) |
137 | process(snoroute); | |
7fe7fe74 SL |
138 | #endif |
139 | /* handle ICMP redirects */ | |
fdd0ed12 SL |
140 | } |
141 | } | |
142 | ||
143 | process(fd) | |
144 | int fd; | |
145 | { | |
fdd0ed12 | 146 | struct sockaddr from; |
ce5e9df4 | 147 | int fromlen = sizeof (from), cc, omask; |
fdd0ed12 | 148 | |
7fe7fe74 | 149 | cc = recvfrom(fd, packet, sizeof (packet), 0, &from, &fromlen); |
fdd0ed12 SL |
150 | if (cc <= 0) { |
151 | if (cc < 0 && errno != EINTR) | |
7fe7fe74 | 152 | perror("recvfrom"); |
fdd0ed12 SL |
153 | return; |
154 | } | |
7fe7fe74 SL |
155 | if (fromlen != sizeof (struct sockaddr_in)) |
156 | return; | |
ce5e9df4 SL |
157 | #define mask(s) (1<<((s)-1)) |
158 | omask = sigblock(mask(SIGALRM)); | |
fdd0ed12 | 159 | rip_input(&from, cc); |
ce5e9df4 | 160 | sigsetmask(omask); |
fdd0ed12 | 161 | } |
7fe7fe74 SL |
162 | |
163 | getsocket(domain, type, sin) | |
164 | int domain, type; | |
165 | struct sockaddr_in *sin; | |
166 | { | |
167 | int retry, s; | |
168 | ||
169 | retry = 1; | |
170 | while ((s = socket(domain, type, 0, 0)) < 0 && retry) { | |
171 | perror("socket"); | |
172 | sleep(5 * retry); | |
173 | retry <<= 1; | |
174 | } | |
175 | if (retry == 0) | |
176 | return (-1); | |
177 | while (bind(s, sin, sizeof (*sin), 0) < 0 && retry) { | |
178 | perror("bind"); | |
179 | sleep(5 * retry); | |
180 | retry <<= 1; | |
181 | } | |
182 | if (retry == 0) | |
183 | return (-1); | |
184 | return (s); | |
185 | } |