- struct in_addr group_addr;
- struct in_addr source_addr;
- const char *ifname;
- const char *group;
- const char *source;
- ifindex_t ifindex;
- int result;
- int fd;
-
- prog_name = argv[0];
-
- fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if (fd < 0) {
- fprintf(stderr,
- "%s: could not create socket: socket(): errno=%d: %s\n",
- prog_name, errno, strerror(errno));
- exit(1);
- }
-
- if (argc != 4) {
- fprintf(stderr,
- "usage: %s interface group source\n"
- "example: %s eth0 232.1.1.1 1.1.1.1\n",
- prog_name, prog_name);
- exit(1);
- }
-
- ifname = argv[1];
- group = argv[2];
- source = argv[3];
-
- ifindex = iface_solve_index(ifname);
- if (ifindex < 0) {
- fprintf(stderr, "%s: could not find interface: %s\n",
- prog_name, ifname);
- exit(1);
- }
-
- result = inet_pton(AF_INET, group, &group_addr);
- if (result <= 0) {
- fprintf(stderr, "%s: bad group address: %s\n",
- prog_name, group);
- exit(1);
- }
-
- result = inet_pton(AF_INET, source, &source_addr);
- if (result <= 0) {
- fprintf(stderr, "%s: bad source address: %s\n",
- prog_name, source);
- exit(1);
- }
-
- result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr);
- if (result) {
- fprintf(stderr,
- "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n",
- prog_name, fd, group, source, ifindex, ifname,
- errno, strerror(errno));
- exit(1);
- }
-
- printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n",
- prog_name, source, group, ifname);
-
- printf("%s: waiting...\n", prog_name);
-
- getchar();
-
- close(fd);
-
- printf("%s: left channel (S,G)=(%s,%s) on interface %s\n",
- prog_name, source, group, ifname);
-
- exit(0);
+ struct in_addr group_addr;
+ struct in_addr source_addr;
+ const char *ifname;
+ const char *group;
+ const char *source;
+ ifindex_t ifindex;
+ int result;
+ int fd;
+
+ prog_name = argv[0];
+
+ fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (fd < 0) {
+ fprintf(stderr,
+ "%s: could not create socket: socket(): errno=%d: %s\n",
+ prog_name, errno, strerror(errno));
+ exit(1);
+ }
+
+ if (argc != 4) {
+ fprintf(stderr,
+ "usage: %s interface group source\n"
+ "example: %s eth0 232.1.1.1 1.1.1.1\n",
+ prog_name, prog_name);
+ exit(1);
+ }
+
+ ifname = argv[1];
+ group = argv[2];
+ source = argv[3];
+
+ ifindex = iface_solve_index(ifname);
+ if (ifindex < 0) {
+ fprintf(stderr, "%s: could not find interface: %s\n", prog_name,
+ ifname);
+ exit(1);
+ }
+
+ result = inet_pton(AF_INET, group, &group_addr);
+ if (result <= 0) {
+ fprintf(stderr, "%s: bad group address: %s\n", prog_name,
+ group);
+ exit(1);
+ }
+
+ result = inet_pton(AF_INET, source, &source_addr);
+ if (result <= 0) {
+ fprintf(stderr, "%s: bad source address: %s\n", prog_name,
+ source);
+ exit(1);
+ }
+
+ result = pim_igmp_join_source(fd, ifindex, group_addr, source_addr);
+ if (result) {
+ fprintf(stderr,
+ "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s\n",
+ prog_name, fd, group, source, ifindex, ifname, errno,
+ strerror(errno));
+ exit(1);
+ }
+
+ printf("%s: joined channel (S,G)=(%s,%s) on interface %s\n", prog_name,
+ source, group, ifname);
+
+ printf("%s: waiting...\n", prog_name);
+
+ getchar();
+
+ close(fd);
+
+ printf("%s: left channel (S,G)=(%s,%s) on interface %s\n", prog_name,
+ source, group, ifname);
+
+ exit(0);