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12e41d03 DL |
1 | /* |
2 | PIM for Quagga | |
3 | Copyright (C) 2008 Everton da Silva Marques | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, but | |
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
19 | ||
20 | $QuaggaId: $Format:%an, %ai, %h$ $ | |
21 | */ | |
22 | ||
8f500a1c RW |
23 | #include <zebra.h> |
24 | ||
12e41d03 DL |
25 | #include <stdlib.h> |
26 | #include <stdio.h> | |
27 | #include <errno.h> | |
28 | #include <string.h> | |
29 | #include <unistd.h> | |
30 | #include <sys/types.h> | |
31 | #include <sys/socket.h> | |
32 | #include <net/if.h> | |
33 | #include <arpa/inet.h> | |
34 | ||
35 | #include "pim_igmp_join.h" | |
36 | ||
37 | const char *prog_name = 0; | |
38 | ||
39 | static int iface_solve_index(const char *ifname) | |
40 | { | |
41 | struct if_nameindex *ini; | |
42 | int ifindex = -1; | |
43 | int i; | |
44 | ||
45 | if (!ifname) | |
46 | return -1; | |
47 | ||
48 | ini = if_nameindex(); | |
49 | if (!ini) { | |
50 | int err = errno; | |
51 | fprintf(stderr, | |
52 | "%s: interface=%s: failure solving index: errno=%d: %s\n", | |
53 | prog_name, ifname, err, strerror(err)); | |
54 | errno = err; | |
55 | return -1; | |
56 | } | |
57 | ||
58 | for (i = 0; ini[i].if_index; ++i) { | |
59 | #if 0 | |
60 | fprintf(stderr, | |
61 | "%s: interface=%s matching against local ifname=%s ifindex=%d\n", | |
62 | prog_name, ifname, ini[i].if_name, ini[i].if_index); | |
63 | #endif | |
64 | if (!strcmp(ini[i].if_name, ifname)) { | |
65 | ifindex = ini[i].if_index; | |
66 | break; | |
67 | } | |
68 | } | |
69 | ||
70 | if_freenameindex(ini); | |
71 | ||
72 | return ifindex; | |
73 | } | |
74 | ||
75 | int main(int argc, const char *argv[]) | |
76 | { | |
77 | struct in_addr group_addr; | |
78 | struct in_addr source_addr; | |
79 | const char *ifname; | |
80 | const char *group; | |
81 | const char *source; | |
82 | int ifindex; | |
83 | int result; | |
84 | int fd; | |
85 | ||
86 | prog_name = argv[0]; | |
87 | ||
88 | fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
89 | if (fd < 0) { | |
90 | fprintf(stderr, | |
91 | "%s: could not create socket: socket(): errno=%d: %s\n", | |
92 | prog_name, errno, strerror(errno)); | |
93 | exit(1); | |
94 | } | |
95 | ||
96 | if (argc != 4) { | |
97 | fprintf(stderr, | |
98 | "usage: %s interface group source\n" | |
99 | "example: %s eth0 232.1.1.1 1.1.1.1\n", | |
100 | prog_name, prog_name); | |
101 | exit(1); | |
102 | } | |
103 | ||
104 | ifname = argv[1]; | |
105 | group = argv[2]; | |
106 | source = argv[3]; | |
107 | ||
108 | ifindex = iface_solve_index(ifname); | |
109 | if (ifindex < 0) { | |
110 | fprintf(stderr, "%s: could not find interface: %s\n", | |
111 | prog_name, ifname); | |
112 | exit(1); | |
113 | } | |
114 | ||
115 | result = inet_pton(AF_INET, group, &group_addr); | |
116 | if (result <= 0) { | |
117 | fprintf(stderr, "%s: bad group address: %s\n", | |
118 | prog_name, group); | |
119 | exit(1); | |
120 | } | |
121 | ||
122 | result = inet_pton(AF_INET, source, &source_addr); | |
123 | if (result <= 0) { | |
124 | fprintf(stderr, "%s: bad source address: %s\n", | |
125 | prog_name, source); | |
126 | exit(1); | |
127 | } | |
128 | ||
129 | result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr); | |
130 | if (result) { | |
131 | fprintf(stderr, | |
132 | "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n", | |
133 | prog_name, fd, group, source, ifindex, ifname, | |
134 | errno, strerror(errno)); | |
135 | exit(1); | |
136 | } | |
137 | ||
138 | printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n", | |
139 | prog_name, source, group, ifname); | |
140 | ||
141 | printf("%s: waiting...\n", prog_name); | |
142 | ||
143 | getchar(); | |
144 | ||
145 | close(fd); | |
146 | ||
147 | printf("%s: left channel (S,G)=(%s,%s) on interface %s\n", | |
148 | prog_name, source, group, ifname); | |
149 | ||
150 | exit(0); | |
151 | } |