siocXmulti.c revision 1.1.2.2
1 1.1.2.2 pgoyette 2 1.1.2.2 pgoyette #include <sys/socket.h> 3 1.1.2.2 pgoyette #include <sys/ioctl.h> 4 1.1.2.2 pgoyette 5 1.1.2.2 pgoyette #include <net/if.h> 6 1.1.2.2 pgoyette #include <netinet/in.h> 7 1.1.2.2 pgoyette #include <arpa/inet.h> 8 1.1.2.2 pgoyette 9 1.1.2.2 pgoyette #include <stdio.h> 10 1.1.2.2 pgoyette #include <stdlib.h> 11 1.1.2.2 pgoyette #include <string.h> 12 1.1.2.2 pgoyette #include <strings.h> 13 1.1.2.2 pgoyette #include <unistd.h> 14 1.1.2.2 pgoyette #include <err.h> 15 1.1.2.2 pgoyette 16 1.1.2.2 pgoyette enum{ 17 1.1.2.2 pgoyette ARG_PROG = 0, 18 1.1.2.2 pgoyette ARG_OP, 19 1.1.2.2 pgoyette ARG_IFNAME, 20 1.1.2.2 pgoyette ARG_ADDR, 21 1.1.2.2 pgoyette ARG_NUM 22 1.1.2.2 pgoyette }; 23 1.1.2.2 pgoyette 24 1.1.2.2 pgoyette static void 25 1.1.2.2 pgoyette usage(void) 26 1.1.2.2 pgoyette { 27 1.1.2.2 pgoyette 28 1.1.2.2 pgoyette printf("%s <add|del> <ifname> <IPv4 addr>\n", 29 1.1.2.2 pgoyette getprogname()); 30 1.1.2.2 pgoyette exit(1); 31 1.1.2.2 pgoyette } 32 1.1.2.2 pgoyette 33 1.1.2.2 pgoyette int 34 1.1.2.2 pgoyette main(int argc, char *argv[]) 35 1.1.2.2 pgoyette { 36 1.1.2.2 pgoyette int fd, rv; 37 1.1.2.2 pgoyette unsigned long req; 38 1.1.2.2 pgoyette struct ifreq ifr; 39 1.1.2.2 pgoyette unsigned int ifidx; 40 1.1.2.2 pgoyette struct sockaddr_in *sin; 41 1.1.2.2 pgoyette struct sockaddr_in6 *sin6; 42 1.1.2.2 pgoyette 43 1.1.2.2 pgoyette bzero(&ifr, sizeof(ifr)); 44 1.1.2.2 pgoyette 45 1.1.2.2 pgoyette if (argc != ARG_NUM) 46 1.1.2.2 pgoyette usage(); 47 1.1.2.2 pgoyette 48 1.1.2.2 pgoyette if (strcmp(argv[ARG_OP], "add") == 0) 49 1.1.2.2 pgoyette req = SIOCADDMULTI; 50 1.1.2.2 pgoyette else if (strcmp(argv[ARG_OP], "del") == 0) 51 1.1.2.2 pgoyette req = SIOCDELMULTI; 52 1.1.2.2 pgoyette else 53 1.1.2.2 pgoyette usage(); 54 1.1.2.2 pgoyette 55 1.1.2.2 pgoyette ifidx = if_nametoindex(argv[ARG_IFNAME]); 56 1.1.2.2 pgoyette if (ifidx == 0) 57 1.1.2.2 pgoyette err(1, "if_nametoindex(%s)", argv[ARG_IFNAME]); 58 1.1.2.2 pgoyette 59 1.1.2.2 pgoyette strncpy(ifr.ifr_name, argv[ARG_IFNAME], sizeof(ifr.ifr_name)); 60 1.1.2.2 pgoyette 61 1.1.2.2 pgoyette sin = (struct sockaddr_in *)&ifr.ifr_addr; 62 1.1.2.2 pgoyette sin->sin_family = AF_INET; 63 1.1.2.2 pgoyette sin->sin_len = sizeof(*sin); 64 1.1.2.2 pgoyette rv = inet_pton(AF_INET, argv[ARG_ADDR], &sin->sin_addr); 65 1.1.2.2 pgoyette 66 1.1.2.2 pgoyette if (rv != 1) { 67 1.1.2.2 pgoyette sin6 = (struct sockaddr_in6 *)&ifr.ifr_addr; 68 1.1.2.2 pgoyette sin6->sin6_family = AF_INET6; 69 1.1.2.2 pgoyette sin6->sin6_len = sizeof(*sin6); 70 1.1.2.2 pgoyette rv = inet_pton(AF_INET6, argv[ARG_ADDR], &sin6->sin6_addr); 71 1.1.2.2 pgoyette 72 1.1.2.2 pgoyette if (rv != 1) 73 1.1.2.2 pgoyette errx(1, "inet_pton(%s)", argv[ARG_ADDR]); 74 1.1.2.2 pgoyette } 75 1.1.2.2 pgoyette 76 1.1.2.2 pgoyette fd = socket(AF_INET, SOCK_DGRAM, 0); 77 1.1.2.2 pgoyette if (fd < 0) 78 1.1.2.2 pgoyette err(1, "socket"); 79 1.1.2.2 pgoyette 80 1.1.2.2 pgoyette if (ioctl(fd, req, (caddr_t)&ifr) < 0) { 81 1.1.2.2 pgoyette err(1, "ioctl(%s)", 82 1.1.2.2 pgoyette (req == SIOCADDMULTI) ? "SIOCADDMULTI" : "SIOCDELMULTI"); 83 1.1.2.2 pgoyette } 84 1.1.2.2 pgoyette 85 1.1.2.2 pgoyette close(fd); 86 1.1.2.2 pgoyette 87 1.1.2.2 pgoyette return 0; 88 1.1.2.2 pgoyette } 89
Indexes created Thu Oct 02 14:10:14 GMT 2025