| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini ping implementation for busybox |
| * |
| * Copyright (C) 1999 by Randolph Chung <tausq@debian.org> |
| * |
| * Adapted from the ping in netkit-base 0.10: |
| * Copyright (c) 1989 The Regents of the University of California. |
| * All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Mike Muuss. |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| */ |
| /* from ping6.c: |
| * Copyright (C) 1999 by Randolph Chung <tausq@debian.org> |
| * |
| * This version of ping is adapted from the ping in netkit-base 0.10, |
| * which is: |
| * |
| * Original copyright notice is retained at the end of this file. |
| * |
| * This version is an adaptation of ping.c from busybox. |
| * The code was modified by Bart Visscher <magick@linux-fan.com> |
| */ |
| |
| #include <net/if.h> |
| #include <netinet/ip_icmp.h> |
| #include "busybox.h" |
| |
| #if ENABLE_PING6 |
| #include <netinet/icmp6.h> |
| /* I see RENUMBERED constants in bits/in.h - !!? |
| * What a fuck is going on with libc? Is it a glibc joke? */ |
| #ifdef IPV6_2292HOPLIMIT |
| #undef IPV6_HOPLIMIT |
| #define IPV6_HOPLIMIT IPV6_2292HOPLIMIT |
| #endif |
| #endif |
| |
| enum { |
| DEFDATALEN = 56, |
| MAXIPLEN = 60, |
| MAXICMPLEN = 76, |
| MAXPACKET = 65468, |
| MAX_DUP_CHK = (8 * 128), |
| MAXWAIT = 10, |
| PINGINTERVAL = 1, /* 1 second */ |
| }; |
| |
| /* common routines */ |
| |
| static int in_cksum(unsigned short *buf, int sz) |
| { |
| int nleft = sz; |
| int sum = 0; |
| unsigned short *w = buf; |
| unsigned short ans = 0; |
| |
| while (nleft > 1) { |
| sum += *w++; |
| nleft -= 2; |
| } |
| |
| if (nleft == 1) { |
| *(unsigned char *) (&ans) = *(unsigned char *) w; |
| sum += ans; |
| } |
| |
| sum = (sum >> 16) + (sum & 0xFFFF); |
| sum += (sum >> 16); |
| ans = ~sum; |
| return ans; |
| } |
| |
| #if !ENABLE_FEATURE_FANCY_PING |
| |
| /* simple version */ |
| |
| static char *hostname; |
| |
| static void noresp(int ign ATTRIBUTE_UNUSED) |
| { |
| printf("No response from %s\n", hostname); |
| exit(EXIT_FAILURE); |
| } |
| |
| static void ping4(len_and_sockaddr *lsa) |
| { |
| struct sockaddr_in pingaddr; |
| struct icmp *pkt; |
| int pingsock, c; |
| char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; |
| |
| pingsock = create_icmp_socket(); |
| pingaddr = lsa->sin; |
| |
| pkt = (struct icmp *) packet; |
| memset(pkt, 0, sizeof(packet)); |
| pkt->icmp_type = ICMP_ECHO; |
| pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet)); |
| |
| c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0, |
| (struct sockaddr *) &pingaddr, sizeof(pingaddr)); |
| |
| if (c < 0) { |
| if (ENABLE_FEATURE_CLEAN_UP) |
| close(pingsock); |
| bb_perror_msg_and_die("sendto"); |
| } |
| |
| /* listen for replies */ |
| while (1) { |
| struct sockaddr_in from; |
| socklen_t fromlen = sizeof(from); |
| |
| c = recvfrom(pingsock, packet, sizeof(packet), 0, |
| (struct sockaddr *) &from, &fromlen); |
| if (c < 0) { |
| if (errno != EINTR) |
| bb_perror_msg("recvfrom"); |
| continue; |
| } |
| if (c >= 76) { /* ip + icmp */ |
| struct iphdr *iphdr = (struct iphdr *) packet; |
| |
| pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */ |
| if (pkt->icmp_type == ICMP_ECHOREPLY) |
| break; |
| } |
| } |
| if (ENABLE_FEATURE_CLEAN_UP) |
| close(pingsock); |
| } |
| |
| #if ENABLE_PING6 |
| static void ping6(len_and_sockaddr *lsa) |
| { |
| struct sockaddr_in6 pingaddr; |
| struct icmp6_hdr *pkt; |
| int pingsock, c; |
| int sockopt; |
| char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; |
| |
| pingsock = create_icmp6_socket(); |
| pingaddr = lsa->sin6; |
| |
| pkt = (struct icmp6_hdr *) packet; |
| memset(pkt, 0, sizeof(packet)); |
| pkt->icmp6_type = ICMP6_ECHO_REQUEST; |
| |
| sockopt = offsetof(struct icmp6_hdr, icmp6_cksum); |
| setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt)); |
| |
| c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0, |
| (struct sockaddr *) &pingaddr, sizeof(pingaddr)); |
| |
| if (c < 0) { |
| if (ENABLE_FEATURE_CLEAN_UP) |
| close(pingsock); |
| bb_perror_msg_and_die("sendto"); |
| } |
| |
| /* listen for replies */ |
| while (1) { |
| struct sockaddr_in6 from; |
| socklen_t fromlen = sizeof(from); |
| |
| c = recvfrom(pingsock, packet, sizeof(packet), 0, |
| (struct sockaddr *) &from, &fromlen); |
| if (c < 0) { |
| if (errno != EINTR) |
| bb_perror_msg("recvfrom"); |
| continue; |
| } |
| if (c >= 8) { /* icmp6_hdr */ |
| pkt = (struct icmp6_hdr *) packet; |
| if (pkt->icmp6_type == ICMP6_ECHO_REPLY) |
| break; |
| } |
| } |
| if (ENABLE_FEATURE_CLEAN_UP) |
| close(pingsock); |
| } |
| #endif |
| |
| int ping_main(int argc, char **argv); |
| int ping_main(int argc, char **argv) |
| { |
| len_and_sockaddr *lsa; |
| #if ENABLE_PING6 |
| sa_family_t af = AF_UNSPEC; |
| while (++argv[0][0] == '-') { |
| if (argv[0][1] == '4') { |
| af = AF_INET; |
| continue; |
| } |
| if (argv[0][1] == '6') { |
| af = AF_INET6; |
| continue; |
| } |
| bb_show_usage(); |
| } |
| #else |
| argv++; |
| #endif |
| |
| hostname = *argv; |
| if (!hostname) |
| bb_show_usage(); |
| |
| #if ENABLE_PING6 |
| lsa = xhost_and_af2sockaddr(hostname, 0, af); |
| #else |
| lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET); |
| #endif |
| /* Set timer _after_ DNS resolution */ |
| signal(SIGALRM, noresp); |
| alarm(5); /* give the host 5000ms to respond */ |
| |
| #if ENABLE_PING6 |
| if (lsa->sa.sa_family == AF_INET6) |
| ping6(lsa); |
| else |
| #endif |
| ping4(lsa); |
| printf("%s is alive!\n", hostname); |
| return EXIT_SUCCESS; |
| } |
| |
| |
| #else /* FEATURE_FANCY_PING */ |
| |
| |
| /* full(er) version */ |
| |
| #define OPT_STRING ("qvc:s:I:4" USE_PING6("6")) |
| enum { |
| OPT_QUIET = 1 << 0, |
| OPT_VERBOSE = 1 << 1, |
| OPT_c = 1 << 2, |
| OPT_s = 1 << 3, |
| OPT_I = 1 << 4, |
| OPT_IPV4 = 1 << 5, |
| OPT_IPV6 = (1 << 6) * ENABLE_PING6, |
| }; |
| |
| |
| static union { |
| struct sockaddr sa; |
| struct sockaddr_in sin; |
| #if ENABLE_PING6 |
| struct sockaddr_in6 sin6; |
| #endif |
| } pingaddr; |
| static len_and_sockaddr *source_lsa; |
| static int pingsock = -1; |
| static unsigned datalen; /* intentionally uninitialized to work around gcc bug */ |
| |
| static int if_index; |
| |
| static unsigned long ntransmitted, nreceived, nrepeats, pingcount; |
| static int myid; |
| static unsigned long tmin = ULONG_MAX, tmax, tsum; |
| static char rcvd_tbl[MAX_DUP_CHK / 8]; |
| |
| static const char *hostname; |
| static const char *dotted; |
| |
| #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ |
| #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ |
| #define SET(bit) (A(bit) |= B(bit)) |
| #define CLR(bit) (A(bit) &= (~B(bit))) |
| #define TST(bit) (A(bit) & B(bit)) |
| |
| /**************************************************************************/ |
| |
| static void pingstats(int junk ATTRIBUTE_UNUSED) |
| { |
| int status; |
| |
| signal(SIGINT, SIG_IGN); |
| |
| printf("\n--- %s ping statistics ---\n", hostname); |
| printf("%lu packets transmitted, ", ntransmitted); |
| printf("%lu packets received, ", nreceived); |
| if (nrepeats) |
| printf("%lu duplicates, ", nrepeats); |
| if (ntransmitted) |
| ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted; |
| printf("%lu%% packet loss\n", ntransmitted); |
| if (nreceived) |
| printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n", |
| tmin / 10, tmin % 10, |
| (tsum / (nreceived + nrepeats)) / 10, |
| (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10); |
| if (nreceived != 0) |
| status = EXIT_SUCCESS; |
| else |
| status = EXIT_FAILURE; |
| exit(status); |
| } |
| |
| static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt) |
| { |
| int sz; |
| |
| CLR((uint16_t)ntransmitted % MAX_DUP_CHK); |
| ntransmitted++; |
| |
| /* sizeof(pingaddr) can be larger than real sa size, but I think |
| * it doesn't matter */ |
| sz = sendto(pingsock, pkt, size_pkt, 0, &pingaddr.sa, sizeof(pingaddr)); |
| if (sz < 0) |
| bb_perror_msg_and_die("sendto"); |
| if (sz != size_pkt) |
| bb_error_msg_and_die("ping wrote %d chars; %d expected", sz, |
| size_pkt); |
| |
| signal(SIGALRM, sp); |
| if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */ |
| alarm(PINGINTERVAL); |
| } else { /* done, wait for the last ping to come back */ |
| /* todo, don't necessarily need to wait so long... */ |
| signal(SIGALRM, pingstats); |
| alarm(MAXWAIT); |
| } |
| } |
| |
| static void sendping4(int junk ATTRIBUTE_UNUSED) |
| { |
| struct icmp *pkt = alloca(datalen + ICMP_MINLEN); |
| |
| pkt->icmp_type = ICMP_ECHO; |
| pkt->icmp_code = 0; |
| pkt->icmp_cksum = 0; |
| pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ |
| pkt->icmp_id = myid; |
| gettimeofday((struct timeval *) &pkt->icmp_dun, NULL); |
| pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN); |
| |
| sendping_tail(sendping4, pkt, datalen + ICMP_MINLEN); |
| } |
| #if ENABLE_PING6 |
| static void sendping6(int junk ATTRIBUTE_UNUSED) |
| { |
| struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr)); |
| |
| pkt->icmp6_type = ICMP6_ECHO_REQUEST; |
| pkt->icmp6_code = 0; |
| pkt->icmp6_cksum = 0; |
| pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ |
| pkt->icmp6_id = myid; |
| gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL); |
| |
| sendping_tail(sendping6, pkt, datalen + sizeof(struct icmp6_hdr)); |
| } |
| #endif |
| |
| static const char *icmp_type_name(int id) |
| { |
| switch (id) { |
| case ICMP_ECHOREPLY: return "Echo Reply"; |
| case ICMP_DEST_UNREACH: return "Destination Unreachable"; |
| case ICMP_SOURCE_QUENCH: return "Source Quench"; |
| case ICMP_REDIRECT: return "Redirect (change route)"; |
| case ICMP_ECHO: return "Echo Request"; |
| case ICMP_TIME_EXCEEDED: return "Time Exceeded"; |
| case ICMP_PARAMETERPROB: return "Parameter Problem"; |
| case ICMP_TIMESTAMP: return "Timestamp Request"; |
| case ICMP_TIMESTAMPREPLY: return "Timestamp Reply"; |
| case ICMP_INFO_REQUEST: return "Information Request"; |
| case ICMP_INFO_REPLY: return "Information Reply"; |
| case ICMP_ADDRESS: return "Address Mask Request"; |
| case ICMP_ADDRESSREPLY: return "Address Mask Reply"; |
| default: return "unknown ICMP type"; |
| } |
| } |
| #if ENABLE_PING6 |
| /* RFC3542 changed some definitions from RFC2292 for no good reason, whee! |
| * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */ |
| #ifndef MLD_LISTENER_QUERY |
| # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY |
| #endif |
| #ifndef MLD_LISTENER_REPORT |
| # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT |
| #endif |
| #ifndef MLD_LISTENER_REDUCTION |
| # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION |
| #endif |
| static const char *icmp6_type_name(int id) |
| { |
| switch (id) { |
| case ICMP6_DST_UNREACH: return "Destination Unreachable"; |
| case ICMP6_PACKET_TOO_BIG: return "Packet too big"; |
| case ICMP6_TIME_EXCEEDED: return "Time Exceeded"; |
| case ICMP6_PARAM_PROB: return "Parameter Problem"; |
| case ICMP6_ECHO_REPLY: return "Echo Reply"; |
| case ICMP6_ECHO_REQUEST: return "Echo Request"; |
| case MLD_LISTENER_QUERY: return "Listener Query"; |
| case MLD_LISTENER_REPORT: return "Listener Report"; |
| case MLD_LISTENER_REDUCTION: return "Listener Reduction"; |
| default: return "unknown ICMP type"; |
| } |
| } |
| #endif |
| |
| static void unpack4(char *buf, int sz, struct sockaddr_in *from) |
| { |
| struct icmp *icmppkt; |
| struct iphdr *iphdr; |
| struct timeval tv, *tp; |
| int hlen, dupflag; |
| unsigned long triptime; |
| |
| gettimeofday(&tv, NULL); |
| |
| /* discard if too short */ |
| if (sz < (datalen + ICMP_MINLEN)) |
| return; |
| |
| /* check IP header */ |
| iphdr = (struct iphdr *) buf; |
| hlen = iphdr->ihl << 2; |
| sz -= hlen; |
| icmppkt = (struct icmp *) (buf + hlen); |
| if (icmppkt->icmp_id != myid) |
| return; /* not our ping */ |
| |
| if (icmppkt->icmp_type == ICMP_ECHOREPLY) { |
| uint16_t recv_seq = ntohs(icmppkt->icmp_seq); |
| ++nreceived; |
| tp = (struct timeval *) icmppkt->icmp_data; |
| |
| if ((tv.tv_usec -= tp->tv_usec) < 0) { |
| --tv.tv_sec; |
| tv.tv_usec += 1000000; |
| } |
| tv.tv_sec -= tp->tv_sec; |
| |
| triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100); |
| tsum += triptime; |
| if (triptime < tmin) |
| tmin = triptime; |
| if (triptime > tmax) |
| tmax = triptime; |
| |
| if (TST(recv_seq % MAX_DUP_CHK)) { |
| ++nrepeats; |
| --nreceived; |
| dupflag = 1; |
| } else { |
| SET(recv_seq % MAX_DUP_CHK); |
| dupflag = 0; |
| } |
| |
| if (option_mask32 & OPT_QUIET) |
| return; |
| |
| printf("%d bytes from %s: icmp_seq=%u", sz, |
| inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr), |
| recv_seq); |
| printf(" ttl=%d", iphdr->ttl); |
| printf(" time=%lu.%lu ms", triptime / 10, triptime % 10); |
| if (dupflag) |
| printf(" (DUP!)"); |
| puts(""); |
| } else { |
| if (icmppkt->icmp_type != ICMP_ECHO) |
| bb_error_msg("warning: got ICMP %d (%s)", |
| icmppkt->icmp_type, |
| icmp_type_name(icmppkt->icmp_type)); |
| } |
| fflush(stdout); |
| } |
| #if ENABLE_PING6 |
| static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit) |
| { |
| struct icmp6_hdr *icmppkt; |
| struct timeval tv, *tp; |
| int dupflag; |
| unsigned long triptime; |
| char buf[INET6_ADDRSTRLEN]; |
| |
| gettimeofday(&tv, NULL); |
| |
| /* discard if too short */ |
| if (sz < (datalen + sizeof(struct icmp6_hdr))) |
| return; |
| |
| icmppkt = (struct icmp6_hdr *) packet; |
| if (icmppkt->icmp6_id != myid) |
| return; /* not our ping */ |
| |
| if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) { |
| uint16_t recv_seq = ntohs(icmppkt->icmp6_seq); |
| ++nreceived; |
| tp = (struct timeval *) &icmppkt->icmp6_data8[4]; |
| |
| if ((tv.tv_usec -= tp->tv_usec) < 0) { |
| --tv.tv_sec; |
| tv.tv_usec += 1000000; |
| } |
| tv.tv_sec -= tp->tv_sec; |
| |
| triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100); |
| tsum += triptime; |
| if (triptime < tmin) |
| tmin = triptime; |
| if (triptime > tmax) |
| tmax = triptime; |
| |
| if (TST(recv_seq % MAX_DUP_CHK)) { |
| ++nrepeats; |
| --nreceived; |
| dupflag = 1; |
| } else { |
| SET(recv_seq % MAX_DUP_CHK); |
| dupflag = 0; |
| } |
| |
| if (option_mask32 & OPT_QUIET) |
| return; |
| |
| printf("%d bytes from %s: icmp6_seq=%u", sz, |
| inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr, |
| buf, sizeof(buf)), |
| recv_seq); |
| printf(" ttl=%d time=%lu.%lu ms", hoplimit, |
| triptime / 10, triptime % 10); |
| if (dupflag) |
| printf(" (DUP!)"); |
| puts(""); |
| } else { |
| if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) |
| bb_error_msg("warning: got ICMP %d (%s)", |
| icmppkt->icmp6_type, |
| icmp6_type_name(icmppkt->icmp6_type)); |
| } |
| fflush(stdout); |
| } |
| #endif |
| |
| static void ping4(len_and_sockaddr *lsa) |
| { |
| char packet[datalen + MAXIPLEN + MAXICMPLEN]; |
| int sockopt; |
| |
| pingsock = create_icmp_socket(); |
| pingaddr.sin = lsa->sin; |
| if (source_lsa) |
| xbind(pingsock, &lsa->sa, lsa->len); |
| |
| /* enable broadcast pings */ |
| setsockopt_broadcast(pingsock); |
| |
| /* set recv buf for broadcast pings */ |
| sockopt = 48 * 1024; /* explain why 48k? */ |
| setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt)); |
| |
| signal(SIGINT, pingstats); |
| |
| /* start the ping's going ... */ |
| sendping4(0); |
| |
| /* listen for replies */ |
| while (1) { |
| struct sockaddr_in from; |
| socklen_t fromlen = (socklen_t) sizeof(from); |
| int c; |
| |
| c = recvfrom(pingsock, packet, sizeof(packet), 0, |
| (struct sockaddr *) &from, &fromlen); |
| if (c < 0) { |
| if (errno != EINTR) |
| bb_perror_msg("recvfrom"); |
| continue; |
| } |
| unpack4(packet, c, &from); |
| if (pingcount > 0 && nreceived >= pingcount) |
| break; |
| } |
| } |
| #if ENABLE_PING6 |
| extern int BUG_bad_offsetof_icmp6_cksum(void); |
| static void ping6(len_and_sockaddr *lsa) |
| { |
| char packet[datalen + MAXIPLEN + MAXICMPLEN]; |
| int sockopt; |
| struct msghdr msg; |
| struct sockaddr_in6 from; |
| struct iovec iov; |
| char control_buf[CMSG_SPACE(36)]; |
| |
| pingsock = create_icmp6_socket(); |
| pingaddr.sin6 = lsa->sin6; |
| /* untested whether "-I addr" really works for IPv6: */ |
| if (source_lsa) |
| xbind(pingsock, &lsa->sa, lsa->len); |
| |
| #ifdef ICMP6_FILTER |
| { |
| struct icmp6_filter filt; |
| if (!(option_mask32 & OPT_VERBOSE)) { |
| ICMP6_FILTER_SETBLOCKALL(&filt); |
| ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); |
| } else { |
| ICMP6_FILTER_SETPASSALL(&filt); |
| } |
| if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, |
| sizeof(filt)) < 0) |
| bb_error_msg_and_die("setsockopt(ICMP6_FILTER)"); |
| } |
| #endif /*ICMP6_FILTER*/ |
| |
| /* enable broadcast pings */ |
| setsockopt_broadcast(pingsock); |
| |
| /* set recv buf for broadcast pings */ |
| sockopt = 48 * 1024; /* explain why 48k? */ |
| setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt)); |
| |
| sockopt = offsetof(struct icmp6_hdr, icmp6_cksum); |
| if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2) |
| BUG_bad_offsetof_icmp6_cksum(); |
| setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt)); |
| |
| /* request ttl info to be returned in ancillary data */ |
| setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1)); |
| |
| if (if_index) |
| pingaddr.sin6.sin6_scope_id = if_index; |
| |
| signal(SIGINT, pingstats); |
| |
| /* start the ping's going ... */ |
| sendping6(0); |
| |
| /* listen for replies */ |
| msg.msg_name = &from; |
| msg.msg_namelen = sizeof(from); |
| msg.msg_iov = &iov; |
| msg.msg_iovlen = 1; |
| msg.msg_control = control_buf; |
| iov.iov_base = packet; |
| iov.iov_len = sizeof(packet); |
| while (1) { |
| int c; |
| struct cmsghdr *mp; |
| int hoplimit = -1; |
| msg.msg_controllen = sizeof(control_buf); |
| |
| c = recvmsg(pingsock, &msg, 0); |
| if (c < 0) { |
| if (errno != EINTR) |
| bb_perror_msg("recvfrom"); |
| continue; |
| } |
| for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) { |
| if (mp->cmsg_level == SOL_IPV6 |
| && mp->cmsg_type == IPV6_HOPLIMIT |
| /* don't check len - we trust the kernel: */ |
| /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */ |
| ) { |
| hoplimit = *(int*)CMSG_DATA(mp); |
| } |
| } |
| unpack6(packet, c, &from, hoplimit); |
| if (pingcount > 0 && nreceived >= pingcount) |
| break; |
| } |
| } |
| #endif |
| |
| static void ping(len_and_sockaddr *lsa) |
| { |
| printf("PING %s (%s)", hostname, dotted); |
| if (source_lsa) { |
| printf(" from %s", |
| xmalloc_sockaddr2dotted_noport(&lsa->sa, lsa->len)); |
| } |
| printf(": %d data bytes\n", datalen); |
| |
| #if ENABLE_PING6 |
| if (lsa->sa.sa_family == AF_INET6) |
| ping6(lsa); |
| else |
| #endif |
| ping4(lsa); |
| } |
| |
| int ping_main(int argc, char **argv); |
| int ping_main(int argc, char **argv) |
| { |
| len_and_sockaddr *lsa; |
| char *opt_c, *opt_s, *opt_I; |
| USE_PING6(sa_family_t af = AF_UNSPEC;) |
| |
| datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */ |
| |
| /* exactly one argument needed, -v and -q don't mix */ |
| opt_complementary = "=1:q--v:v--q"; |
| getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I); |
| if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c |
| if (option_mask32 & OPT_s) datalen = xatou16(opt_s); // -s |
| if (option_mask32 & OPT_I) { // -I |
| if_index = if_nametoindex(opt_I); |
| if (!if_index) { |
| /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */ |
| /* (ping doesn't support source IPv6 addresses yet anyway) */ |
| source_lsa = xdotted2sockaddr(opt_I, 0); |
| } |
| } |
| myid = (int16_t) getpid(); |
| hostname = argv[optind]; |
| #if ENABLE_PING6 |
| if (option_mask32 & OPT_IPV4) |
| af = AF_INET; |
| if (option_mask32 & OPT_IPV6) |
| af = AF_INET6; |
| lsa = xhost_and_af2sockaddr(hostname, 0, af); |
| #else |
| lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET); |
| #endif |
| |
| if (source_lsa && source_lsa->sa.sa_family != lsa->sa.sa_family) |
| /* leaking it here... */ |
| source_lsa = NULL; |
| |
| dotted = xmalloc_sockaddr2dotted_noport(&lsa->sa, lsa->len); |
| ping(lsa); |
| pingstats(0); |
| return EXIT_SUCCESS; |
| } |
| #endif /* FEATURE_FANCY_PING */ |
| |
| |
| #if ENABLE_PING6 |
| int ping6_main(int argc, char **argv); |
| int ping6_main(int argc, char **argv) |
| { |
| argv[0] = (char*)"-6"; |
| return ping_main(argc + 1, argv - 1); |
| } |
| #endif |
| |
| /* from ping6.c: |
| * Copyright (c) 1989 The Regents of the University of California. |
| * All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Mike Muuss. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change |
| * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> |
| * |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |