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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. | |
ac4d0be5 | 14 | |
12e41d03 DL |
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 | |
12e41d03 DL |
19 | */ |
20 | ||
8f500a1c RW |
21 | #include <zebra.h> |
22 | ||
12e41d03 DL |
23 | #include <stdlib.h> |
24 | #include <stdio.h> | |
25 | #include <errno.h> | |
26 | #include <string.h> | |
27 | #include <unistd.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/socket.h> | |
30 | #include <net/if.h> | |
31 | #include <arpa/inet.h> | |
32 | ||
b892f1dd | 33 | #include "if.h" |
12e41d03 DL |
34 | #include "pim_igmp_join.h" |
35 | ||
36 | const char *prog_name = 0; | |
37 | ||
38 | static int iface_solve_index(const char *ifname) | |
39 | { | |
ac4d0be5 | 40 | struct if_nameindex *ini; |
41 | ifindex_t ifindex = -1; | |
42 | int i; | |
43 | ||
44 | if (!ifname) | |
45 | return -1; | |
46 | ||
47 | ini = if_nameindex(); | |
48 | if (!ini) { | |
49 | int err = errno; | |
50 | fprintf(stderr, | |
51 | "%s: interface=%s: failure solving index: errno=%d: %s\n", | |
52 | prog_name, ifname, err, strerror(err)); | |
53 | errno = err; | |
54 | return -1; | |
55 | } | |
56 | ||
57 | for (i = 0; ini[i].if_index; ++i) { | |
12e41d03 DL |
58 | #if 0 |
59 | fprintf(stderr, | |
60 | "%s: interface=%s matching against local ifname=%s ifindex=%d\n", | |
61 | prog_name, ifname, ini[i].if_name, ini[i].if_index); | |
62 | #endif | |
ac4d0be5 | 63 | if (!strcmp(ini[i].if_name, ifname)) { |
64 | ifindex = ini[i].if_index; | |
65 | break; | |
66 | } | |
67 | } | |
12e41d03 | 68 | |
ac4d0be5 | 69 | if_freenameindex(ini); |
12e41d03 | 70 | |
ac4d0be5 | 71 | return ifindex; |
12e41d03 DL |
72 | } |
73 | ||
74 | int main(int argc, const char *argv[]) | |
75 | { | |
ac4d0be5 | 76 | struct in_addr group_addr; |
77 | struct in_addr source_addr; | |
78 | const char *ifname; | |
79 | const char *group; | |
80 | const char *source; | |
81 | ifindex_t ifindex; | |
82 | int result; | |
83 | int fd; | |
84 | ||
85 | prog_name = argv[0]; | |
86 | ||
87 | fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
88 | if (fd < 0) { | |
89 | fprintf(stderr, | |
90 | "%s: could not create socket: socket(): errno=%d: %s\n", | |
91 | prog_name, errno, strerror(errno)); | |
92 | exit(1); | |
93 | } | |
94 | ||
95 | if (argc != 4) { | |
96 | fprintf(stderr, | |
97 | "usage: %s interface group source\n" | |
98 | "example: %s eth0 232.1.1.1 1.1.1.1\n", | |
99 | prog_name, prog_name); | |
100 | exit(1); | |
101 | } | |
102 | ||
103 | ifname = argv[1]; | |
104 | group = argv[2]; | |
105 | source = argv[3]; | |
106 | ||
107 | ifindex = iface_solve_index(ifname); | |
108 | if (ifindex < 0) { | |
109 | fprintf(stderr, "%s: could not find interface: %s\n", prog_name, | |
110 | ifname); | |
111 | exit(1); | |
112 | } | |
113 | ||
114 | result = inet_pton(AF_INET, group, &group_addr); | |
115 | if (result <= 0) { | |
116 | fprintf(stderr, "%s: bad group address: %s\n", prog_name, | |
117 | group); | |
118 | exit(1); | |
119 | } | |
120 | ||
121 | result = inet_pton(AF_INET, source, &source_addr); | |
122 | if (result <= 0) { | |
123 | fprintf(stderr, "%s: bad source address: %s\n", prog_name, | |
124 | source); | |
125 | exit(1); | |
126 | } | |
127 | ||
128 | result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr); | |
129 | if (result) { | |
130 | fprintf(stderr, | |
131 | "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n", | |
132 | prog_name, fd, group, source, ifindex, ifname, errno, | |
133 | strerror(errno)); | |
134 | exit(1); | |
135 | } | |
136 | ||
137 | printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n", prog_name, | |
138 | source, group, ifname); | |
139 | ||
140 | printf("%s: waiting...\n", prog_name); | |
141 | ||
142 | getchar(); | |
143 | ||
144 | close(fd); | |
145 | ||
146 | printf("%s: left channel (S,G)=(%s,%s) on interface %s\n", prog_name, | |
147 | source, group, ifname); | |
148 | ||
149 | exit(0); | |
12e41d03 | 150 | } |