diff options
Diffstat (limited to 'sbin/ping/ping.c')
| -rw-r--r-- | sbin/ping/ping.c | 66 |
1 files changed, 62 insertions, 4 deletions
diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c index 3609ae2fe621..13f3344cbcbb 100644 --- a/sbin/ping/ping.c +++ b/sbin/ping/ping.c @@ -105,6 +105,12 @@ int options; #define F_SO_DONTROUTE 0x080 #define F_VERBOSE 0x100 +/* multicast options */ +int moptions; +#define MULTICAST_NOLOOP 0x001 +#define MULTICAST_TTL 0x002 +#define MULTICAST_IF 0x004 + /* * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum * number of received sequence numbers we can keep track of. Change 128 @@ -149,17 +155,19 @@ main(argc, argv) struct hostent *hp; struct sockaddr_in *to; struct protoent *proto; - register int i; + struct in_addr ifaddr; + int i; int ch, fdmask, hold, packlen, preload; u_char *datap, *packet; char *target, hnamebuf[MAXHOSTNAMELEN], *malloc(); + u_char ttl, loop; #ifdef IP_OPTIONS char rspace[3 + 4 * NROUTES + 1]; /* record route space */ #endif preload = 0; datap = &outpack[8 + sizeof(struct timeval)]; - while ((ch = getopt(argc, argv, "Rc:dfh:i:l:np:qrs:v")) != EOF) + while ((ch = getopt(argc, argv, "I:LRc:dfh:i:l:np:qrs:t:v")) != EOF) switch(ch) { case 'c': npackets = atoi(optarg); @@ -230,12 +238,40 @@ main(argc, argv) case 'v': options |= F_VERBOSE; break; + case 'L': + moptions |= MULTICAST_NOLOOP; + loop = 0; + break; + case 't': + moptions |= MULTICAST_TTL; + i = atoi(optarg); + if (i < 0 || i > 255) { + printf("ttl %u out of range\n", i); + exit(1); + } + ttl = i; + break; + case 'I': + moptions |= MULTICAST_IF; + { + int i1, i2, i3, i4; + + if (sscanf(optarg, "%u.%u.%u.%u%c", + &i1, &i2, &i3, &i4, &i) != 4) { + printf("bad interface address '%s'\n", + optarg); + exit(1); + } + ifaddr.s_addr = (i1<<24)|(i2<<16)|(i3<<8)|i4; + ifaddr.s_addr = htonl(ifaddr.s_addr); + } + break; default: usage(); } argc -= optind; argv += optind; - + if (argc != 1) usage(); target = *argv; @@ -322,6 +358,28 @@ main(argc, argv) (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, sizeof(hold)); + if (moptions & MULTICAST_NOLOOP) { + if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, + &loop, 1) == -1) { + perror ("can't disable multicast loopback"); + exit(92); + } + } + if (moptions & MULTICAST_TTL) { + if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, + &ttl, 1) == -1) { + perror ("can't set multicast time-to-live"); + exit(93); + } + } + if (moptions & MULTICAST_IF) { + if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, + &ifaddr, sizeof(ifaddr)) == -1) { + perror ("can't set multicast source interface"); + exit(94); + } + } + if (to->sin_family == AF_INET) (void)printf("PING %s (%s): %d data bytes\n", hostname, inet_ntoa(*(struct in_addr *)&to->sin_addr.s_addr), @@ -990,6 +1048,6 @@ fill(bp, patp) usage() { (void)fprintf(stderr, - "usage: ping [-Rdfnqrv] [-c count] [-i wait] [-l preload]\n\t[-p pattern] [-s packetsize] host\n"); + "usage: ping [-LRdfnqrv] [-c count] [-i wait] [-l preload]\n\t[-p pattern] [-s packetsize] [-t ttl] [-I interface address] host\n"); exit(1); } |