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- /* 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 source tree.
- */
- /* 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>
- */
- //config:config PING
- //config: bool "ping (10 kb)"
- //config: default y
- //config: help
- //config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
- //config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
- //config:
- //config:config PING6
- //config: bool "ping6 (11 kb)"
- //config: default y
- //config: depends on FEATURE_IPV6
- //config: help
- //config: Alias to "ping -6".
- //config:
- //config:config FEATURE_FANCY_PING
- //config: bool "Enable fancy ping output"
- //config: default y
- //config: depends on PING || PING6
- //config: help
- //config: With this option off, ping will say "HOST is alive!"
- //config: or terminate with SIGALRM in 5 seconds otherwise.
- //config: No command-line options will be recognized.
- /* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
- //applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
- //applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
- //kbuild:lib-$(CONFIG_PING) += ping.o
- //kbuild:lib-$(CONFIG_PING6) += ping.o
- //usage:#if !ENABLE_FEATURE_FANCY_PING
- //usage:# define ping_trivial_usage
- //usage: "HOST"
- //usage:# define ping_full_usage "\n\n"
- //usage: "Send ICMP ECHO_REQUESTs to HOST"
- //usage:# define ping6_trivial_usage
- //usage: "HOST"
- //usage:# define ping6_full_usage "\n\n"
- //usage: "Send ICMP ECHO_REQUESTs to HOST"
- //usage:#else
- //usage:# define ping_trivial_usage
- //usage: "[OPTIONS] HOST"
- //usage:# define ping_full_usage "\n\n"
- //usage: "Send ICMP ECHO_REQUESTs to HOST\n"
- //usage: IF_PING6(
- //usage: "\n -4,-6 Force IP or IPv6 name resolution"
- //usage: )
- //usage: "\n -c CNT Send only CNT pings"
- //usage: "\n -s SIZE Send SIZE data bytes in packets (default 56)"
- //usage: "\n -i SECS Interval"
- //usage: "\n -A Ping as soon as reply is recevied"
- //usage: "\n -t TTL Set TTL"
- //usage: "\n -I IFACE/IP Source interface or IP address"
- //usage: "\n -W SEC Seconds to wait for the first response (default 10)"
- //usage: "\n (after all -c CNT packets are sent)"
- //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
- //usage: "\n (can exit earlier with -c CNT)"
- //usage: "\n -q Quiet, only display output at start/finish"
- //usage: "\n -p HEXBYTE Payload pattern"
- //usage:
- //usage:# define ping6_trivial_usage
- //usage: "[OPTIONS] HOST"
- //usage:# define ping6_full_usage "\n\n"
- //usage: "Send ICMP ECHO_REQUESTs to HOST\n"
- //usage: "\n -c CNT Send only CNT pings"
- //usage: "\n -s SIZE Send SIZE data bytes in packets (default 56)"
- //usage: "\n -i SECS Interval"
- //usage: "\n -A Ping as soon as reply is recevied"
- ///////: "\n -t TTL Set TTL"
- ///////^^^^^ -t not tested for IPv6, might be not working
- //usage: "\n -I IFACE/IP Source interface or IP address"
- //usage: "\n -W SEC Seconds to wait for the first response (default 10)"
- //usage: "\n (after all -c CNT packets are sent)"
- //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
- //usage: "\n (can exit earlier with -c CNT)"
- //usage: "\n -q Quiet, only display output at start/finish"
- //usage: "\n -p HEXBYTE Payload pattern"
- //usage:
- //usage:#endif
- //usage:
- //usage:#define ping_example_usage
- //usage: "$ ping localhost\n"
- //usage: "PING slag (127.0.0.1): 56 data bytes\n"
- //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
- //usage: "\n"
- //usage: "--- debian ping statistics ---\n"
- //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
- //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
- //usage:#define ping6_example_usage
- //usage: "$ ping6 ip6-localhost\n"
- //usage: "PING ip6-localhost (::1): 56 data bytes\n"
- //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
- //usage: "\n"
- //usage: "--- ip6-localhost ping statistics ---\n"
- //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
- //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
- #include <net/if.h>
- #if defined(__FreeBSD__)
- # include <netinet/in.h> /* struct ip and friends */
- # include <netinet/ip.h>
- #endif
- #include <netinet/ip_icmp.h>
- #include "libbb.h"
- #include "common_bufsiz.h"
- #ifdef __BIONIC__
- /* should be in netinet/ip_icmp.h */
- # define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
- # define ICMP_SOURCE_QUENCH 4 /* Source Quench */
- # define ICMP_REDIRECT 5 /* Redirect (change route) */
- # define ICMP_ECHO 8 /* Echo Request */
- # define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
- # define ICMP_PARAMETERPROB 12 /* Parameter Problem */
- # define ICMP_TIMESTAMP 13 /* Timestamp Request */
- # define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
- # define ICMP_INFO_REQUEST 15 /* Information Request */
- # define ICMP_INFO_REPLY 16 /* Information Reply */
- # define ICMP_ADDRESS 17 /* Address Mask Request */
- # define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
- #endif
- /* Some operating systems, like GNU/Hurd, don't define SOL_RAW, but do have
- * IPPROTO_RAW. Since the IPPROTO definitions are also valid to use for
- * setsockopt (and take the same value as their corresponding SOL definitions,
- * if they exist), we can just fall back on IPPROTO_RAW. */
- #ifndef SOL_RAW
- # define SOL_RAW IPPROTO_RAW
- #endif
- #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
- #if defined(__FreeBSD__)
- /**
- * On BSD the IPv4 struct is called struct ip and instead of iXX
- * the members are called ip_XX. One could change this code to use
- * struct ip but that would require to define _BSD_SOURCE and that
- * might have other complications. Instead make sure struct iphdr
- * is present on FreeBSD. The below is taken from GLIBC.
- *
- * The GNU C Library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- */
- struct iphdr {
- # if BYTE_ORDER == LITTLE_ENDIAN
- unsigned int ihl:4;
- unsigned int version:4;
- # elif BYTE_ORDER == BIG_ENDIAN
- unsigned int version:4;
- unsigned int ihl:4;
- # endif
- uint8_t tos;
- uint16_t tot_len;
- uint16_t id;
- uint16_t frag_off;
- uint8_t ttl;
- uint8_t protocol;
- uint16_t check;
- uint32_t saddr;
- uint32_t daddr;
- /*The options start here. */
- };
- #endif
- enum {
- DEFDATALEN = 56,
- MAXIPLEN = 60,
- MAXICMPLEN = 76,
- MAX_DUP_CHK = (8 * 128),
- MAXWAIT = 10,
- PINGINTERVAL = 1, /* 1 second */
- pingsock = 0,
- };
- static void
- #if ENABLE_PING6
- create_icmp_socket(len_and_sockaddr *lsa)
- #else
- create_icmp_socket(void)
- #define create_icmp_socket(lsa) create_icmp_socket()
- #endif
- {
- int sock;
- #if ENABLE_PING6
- if (lsa->u.sa.sa_family == AF_INET6)
- sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
- else
- #endif
- sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
- if (sock < 0) {
- if (errno == EPERM)
- bb_simple_error_msg_and_die(bb_msg_perm_denied_are_you_root);
- bb_simple_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
- }
- xmove_fd(sock, pingsock);
- }
- #if !ENABLE_FEATURE_FANCY_PING
- /* Simple version */
- struct globals {
- char *hostname;
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
- uint16_t myid;
- } FIX_ALIASING;
- #define G (*(struct globals*)bb_common_bufsiz1)
- #define INIT_G() do { setup_common_bufsiz(); } while (0)
- static void noresp(int ign UNUSED_PARAM)
- {
- printf("No response from %s\n", G.hostname);
- exit(EXIT_FAILURE);
- }
- static void ping4(len_and_sockaddr *lsa)
- {
- struct icmp *pkt;
- int c;
- pkt = (struct icmp *) G.packet;
- /*memset(pkt, 0, sizeof(G.packet)); already is */
- pkt->icmp_type = ICMP_ECHO;
- pkt->icmp_id = G.myid;
- pkt->icmp_cksum = inet_cksum(pkt, sizeof(G.packet));
- xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
- /* listen for replies */
- while (1) {
- #if 0
- struct sockaddr_in from;
- socklen_t fromlen = sizeof(from);
- c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
- (struct sockaddr *) &from, &fromlen);
- #else
- c = recv(pingsock, G.packet, sizeof(G.packet), 0);
- #endif
- if (c < 0) {
- if (errno != EINTR)
- bb_simple_perror_msg("recvfrom");
- continue;
- }
- if (c >= 76) { /* ip + icmp */
- struct iphdr *iphdr = (struct iphdr *) G.packet;
- pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
- if (pkt->icmp_id != G.myid)
- continue; /* not our ping */
- if (pkt->icmp_type == ICMP_ECHOREPLY)
- break;
- }
- }
- }
- #if ENABLE_PING6
- static void ping6(len_and_sockaddr *lsa)
- {
- struct icmp6_hdr *pkt;
- int c;
- int sockopt;
- pkt = (struct icmp6_hdr *) G.packet;
- /*memset(pkt, 0, sizeof(G.packet)); already is */
- pkt->icmp6_type = ICMP6_ECHO_REQUEST;
- pkt->icmp6_id = G.myid;
- sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
- setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
- xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
- /* listen for replies */
- while (1) {
- #if 0
- struct sockaddr_in6 from;
- socklen_t fromlen = sizeof(from);
- c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
- (struct sockaddr *) &from, &fromlen);
- #else
- c = recv(pingsock, G.packet, sizeof(G.packet), 0);
- #endif
- if (c < 0) {
- if (errno != EINTR)
- bb_simple_perror_msg("recvfrom");
- continue;
- }
- if (c >= ICMP_MINLEN) { /* icmp6_hdr */
- if (pkt->icmp6_id != G.myid)
- continue; /* not our ping */
- if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
- break;
- }
- }
- }
- #endif
- #if !ENABLE_PING6
- # define common_ping_main(af, argv) common_ping_main(argv)
- #endif
- static int common_ping_main(sa_family_t af, char **argv)
- {
- len_and_sockaddr *lsa;
- INIT_G();
- #if ENABLE_PING6
- while ((++argv)[0] && 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
- G.hostname = *argv;
- if (!G.hostname)
- bb_show_usage();
- #if ENABLE_PING6
- lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
- #else
- lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
- #endif
- /* Set timer _after_ DNS resolution */
- signal(SIGALRM, noresp);
- alarm(5); /* give the host 5000ms to respond */
- create_icmp_socket(lsa);
- G.myid = (uint16_t) getpid();
- /* we can use native-endian ident, but other Unix ping/traceroute
- * utils use *big-endian pid*, and e.g. traceroute on our machine may be
- * *not* from busybox, idents may collide. Follow the convention:
- */
- G.myid = htons(G.myid);
- #if ENABLE_PING6
- if (lsa->u.sa.sa_family == AF_INET6)
- ping6(lsa);
- else
- #endif
- ping4(lsa);
- if (ENABLE_FEATURE_CLEAN_UP)
- close(pingsock);
- printf("%s is alive!\n", G.hostname);
- return EXIT_SUCCESS;
- }
- #else /* FEATURE_FANCY_PING */
- /* Full(er) version */
- /* -c NUM, -t NUM, -w NUM, -W NUM */
- #define OPT_STRING "qvAc:+s:t:+w:+W:+I:np:i:4"IF_PING6("6")
- enum {
- OPT_QUIET = 1 << 0,
- OPT_VERBOSE = 1 << 1,
- OPT_A = 1 << 2,
- OPT_c = 1 << 3,
- OPT_s = 1 << 4,
- OPT_t = 1 << 5,
- OPT_w = 1 << 6,
- OPT_W = 1 << 7,
- OPT_I = 1 << 8,
- /*OPT_n = 1 << 9, - ignored */
- OPT_p = 1 << 10,
- OPT_i = 1 << 11,
- OPT_IPV4 = 1 << 12,
- OPT_IPV6 = (1 << 13) * ENABLE_PING6,
- };
- struct globals {
- int if_index;
- char *str_I;
- len_and_sockaddr *source_lsa;
- unsigned datalen;
- unsigned pingcount; /* must be int-sized */
- unsigned opt_ttl;
- unsigned long ntransmitted, nreceived, nrepeats;
- uint16_t myid;
- uint8_t pattern;
- unsigned tmin, tmax; /* in us */
- unsigned long long tsum; /* in us, sum of all times */
- unsigned cur_us; /* low word only, we don't need more */
- unsigned deadline_us;
- unsigned interval_us;
- unsigned timeout;
- unsigned sizeof_rcv_packet;
- char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
- void *snd_packet; /* [datalen + ipv4/ipv6_const] */
- const char *hostname;
- const char *dotted;
- union {
- struct sockaddr sa;
- struct sockaddr_in sin;
- #if ENABLE_PING6
- struct sockaddr_in6 sin6;
- #endif
- } pingaddr;
- unsigned char rcvd_tbl[MAX_DUP_CHK / 8];
- } FIX_ALIASING;
- #define G (*(struct globals*)bb_common_bufsiz1)
- #define if_index (G.if_index )
- #define source_lsa (G.source_lsa )
- #define str_I (G.str_I )
- #define datalen (G.datalen )
- #define pingcount (G.pingcount )
- #define opt_ttl (G.opt_ttl )
- #define myid (G.myid )
- #define tmin (G.tmin )
- #define tmax (G.tmax )
- #define tsum (G.tsum )
- #define timeout (G.timeout )
- #define hostname (G.hostname )
- #define dotted (G.dotted )
- #define pingaddr (G.pingaddr )
- #define rcvd_tbl (G.rcvd_tbl )
- #define INIT_G() do { \
- setup_common_bufsiz(); \
- BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
- datalen = DEFDATALEN; \
- timeout = MAXWAIT; \
- tmin = UINT_MAX; \
- } while (0)
- #define BYTE(bit) rcvd_tbl[(bit)>>3]
- #define MASK(bit) (1 << ((bit) & 7))
- #define SET(bit) (BYTE(bit) |= MASK(bit))
- #define CLR(bit) (BYTE(bit) &= (~MASK(bit)))
- #define TST(bit) (BYTE(bit) & MASK(bit))
- static void print_stats_and_exit(int junk) NORETURN;
- static void print_stats_and_exit(int junk UNUSED_PARAM)
- {
- unsigned long ul;
- unsigned long nrecv;
- signal(SIGINT, SIG_IGN);
- nrecv = G.nreceived;
- printf("\n--- %s ping statistics ---\n"
- "%lu packets transmitted, "
- "%lu packets received, ",
- hostname, G.ntransmitted, nrecv
- );
- if (G.nrepeats)
- printf("%lu duplicates, ", G.nrepeats);
- ul = G.ntransmitted;
- if (ul != 0)
- ul = (ul - nrecv) * 100 / ul;
- printf("%lu%% packet loss\n", ul);
- if (tmin != UINT_MAX) {
- unsigned tavg = tsum / (nrecv + G.nrepeats);
- printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
- tmin / 1000, tmin % 1000,
- tavg / 1000, tavg % 1000,
- tmax / 1000, tmax % 1000);
- }
- /* if condition is true, exit with 1 -- 'failure' */
- exit(nrecv == 0 || (G.deadline_us && nrecv < pingcount));
- }
- static void sendping_tail(void (*sp)(int), int size_pkt)
- {
- int sz;
- if (G.deadline_us) {
- unsigned n = G.cur_us - G.deadline_us;
- if ((int)n >= 0)
- print_stats_and_exit(0);
- }
- CLR((uint16_t)G.ntransmitted % MAX_DUP_CHK);
- G.ntransmitted++;
- size_pkt += datalen;
- /* sizeof(pingaddr) can be larger than real sa size, but I think
- * it doesn't matter */
- sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
- if (sz != size_pkt)
- bb_simple_error_msg_and_die(bb_msg_write_error);
- if (pingcount == 0 || G.ntransmitted < pingcount) {
- /* Didn't send all pings yet - schedule next in -i SEC interval */
- struct itimerval i;
- signal(SIGALRM, sp);
- /*ualarm(G.interval_us, 0); - does not work for >=1sec on some libc */
- i.it_interval.tv_sec = 0;
- i.it_interval.tv_usec = 0;
- i.it_value.tv_sec = G.interval_us / 1000000;
- i.it_value.tv_usec = G.interval_us % 1000000;
- setitimer(ITIMER_REAL, &i, NULL);
- } else { /* -c NN, and all NN are sent */
- /* Wait for the last ping to come back.
- * -W timeout: wait for a response in seconds.
- * Affects only timeout in absence of any responses,
- * otherwise ping waits for two RTTs. */
- unsigned expire = timeout;
- if (G.nreceived) {
- /* approx. 2*tmax, in seconds (2 RTT) */
- expire = tmax / (512*1024);
- if (expire == 0)
- expire = 1;
- }
- signal(SIGALRM, print_stats_and_exit);
- alarm(expire);
- }
- }
- static void sendping4(int junk UNUSED_PARAM)
- {
- struct icmp *pkt = G.snd_packet;
- memset(pkt, G.pattern, datalen + ICMP_MINLEN + 4);
- pkt->icmp_type = ICMP_ECHO;
- /*pkt->icmp_code = 0;*/
- pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
- pkt->icmp_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
- pkt->icmp_id = myid;
- /* If datalen < 4, we store timestamp _past_ the packet,
- * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
- */
- /*if (datalen >= 4)*/
- /* No hton: we'll read it back on the same machine */
- *(uint32_t*)&pkt->icmp_dun = G.cur_us = monotonic_us();
- pkt->icmp_cksum = inet_cksum(pkt, datalen + ICMP_MINLEN);
- sendping_tail(sendping4, ICMP_MINLEN);
- }
- #if ENABLE_PING6
- static void sendping6(int junk UNUSED_PARAM)
- {
- struct icmp6_hdr *pkt = G.snd_packet;
- memset(pkt, G.pattern, datalen + sizeof(struct icmp6_hdr) + 4);
- pkt->icmp6_type = ICMP6_ECHO_REQUEST;
- /*pkt->icmp6_code = 0;*/
- /*pkt->icmp6_cksum = 0;*/
- pkt->icmp6_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
- pkt->icmp6_id = myid;
- /*if (datalen >= 4)*/
- *(bb__aliased_uint32_t*)(&pkt->icmp6_data8[4]) = G.cur_us = monotonic_us();
- //TODO? pkt->icmp_cksum = inet_cksum(...);
- sendping_tail(sendping6, 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 unpack_tail(int sz, uint32_t *tp,
- const char *from_str,
- uint16_t recv_seq, int ttl)
- {
- unsigned char *b, m;
- const char *dupmsg = " (DUP!)";
- unsigned triptime = triptime; /* for gcc */
- if (tp) {
- /* (int32_t) cast is for hypothetical 64-bit unsigned */
- /* (doesn't hurt 32-bit real-world anyway) */
- triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
- tsum += triptime;
- if (triptime < tmin)
- tmin = triptime;
- if (triptime > tmax)
- tmax = triptime;
- }
- b = &BYTE(recv_seq % MAX_DUP_CHK);
- m = MASK(recv_seq % MAX_DUP_CHK);
- /*if TST(recv_seq % MAX_DUP_CHK):*/
- if (*b & m) {
- ++G.nrepeats;
- } else {
- /*SET(recv_seq % MAX_DUP_CHK):*/
- *b |= m;
- ++G.nreceived;
- dupmsg += 7;
- }
- if (option_mask32 & OPT_QUIET)
- return;
- printf("%d bytes from %s: seq=%u ttl=%d", sz,
- from_str, recv_seq, ttl);
- if (tp)
- printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
- puts(dupmsg);
- fflush_all();
- }
- static int unpack4(char *buf, int sz, struct sockaddr_in *from)
- {
- struct icmp *icmppkt;
- struct iphdr *iphdr;
- int hlen;
- /* discard if too short */
- if (sz < (datalen + ICMP_MINLEN))
- return 0;
- /* check IP header */
- iphdr = (struct iphdr *) buf;
- hlen = iphdr->ihl << 2;
- sz -= hlen;
- icmppkt = (struct icmp *) (buf + hlen);
- if (icmppkt->icmp_id != myid)
- return 0; /* not our ping */
- if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
- uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
- uint32_t *tp = NULL;
- if (sz >= ICMP_MINLEN + sizeof(uint32_t))
- tp = (uint32_t *) icmppkt->icmp_data;
- unpack_tail(sz, tp,
- inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
- recv_seq, iphdr->ttl);
- return 1;
- }
- if (icmppkt->icmp_type != ICMP_ECHO) {
- bb_error_msg("warning: got ICMP %d (%s)",
- icmppkt->icmp_type,
- icmp_type_name(icmppkt->icmp_type));
- }
- return 0;
- }
- #if ENABLE_PING6
- static int unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
- {
- struct icmp6_hdr *icmppkt;
- char buf[INET6_ADDRSTRLEN];
- /* discard if too short */
- if (sz < (datalen + sizeof(struct icmp6_hdr)))
- return 0;
- icmppkt = (struct icmp6_hdr *) packet;
- if (icmppkt->icmp6_id != myid)
- return 0; /* not our ping */
- if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
- uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
- uint32_t *tp = NULL;
- if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
- tp = (uint32_t *) &icmppkt->icmp6_data8[4];
- unpack_tail(sz, tp,
- inet_ntop(AF_INET6, &from->sin6_addr,
- buf, sizeof(buf)),
- recv_seq, hoplimit);
- return 1;
- }
- if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
- bb_error_msg("warning: got ICMP %d (%s)",
- icmppkt->icmp6_type,
- icmp6_type_name(icmppkt->icmp6_type));
- }
- return 0;
- }
- #endif
- static void ping4(len_and_sockaddr *lsa)
- {
- int sockopt;
- pingaddr.sin = lsa->u.sin;
- if (source_lsa) {
- if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
- &source_lsa->u.sa, source_lsa->len))
- bb_simple_error_msg_and_die("can't set multicast source interface");
- xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
- }
- /* enable broadcast pings */
- setsockopt_broadcast(pingsock);
- /* set recv buf (needed if we can get lots of responses: flood ping,
- * broadcast ping etc) */
- sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
- setsockopt_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
- if (opt_ttl != 0) {
- setsockopt_int(pingsock, IPPROTO_IP, IP_TTL, opt_ttl);
- /* above doesn't affect packets sent to bcast IP, so... */
- setsockopt_int(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, opt_ttl);
- }
- signal(SIGINT, print_stats_and_exit);
- /* start the ping's going ... */
- send_ping:
- sendping4(0);
- /* listen for replies */
- while (1) {
- struct sockaddr_in from;
- socklen_t fromlen = (socklen_t) sizeof(from);
- int c;
- c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
- (struct sockaddr *) &from, &fromlen);
- if (c < 0) {
- if (errno != EINTR)
- bb_simple_perror_msg("recvfrom");
- continue;
- }
- c = unpack4(G.rcv_packet, c, &from);
- if (pingcount && G.nreceived >= pingcount)
- break;
- if (c && (option_mask32 & OPT_A)) {
- goto send_ping;
- }
- }
- }
- #if ENABLE_PING6
- static void ping6(len_and_sockaddr *lsa)
- {
- int sockopt;
- struct msghdr msg;
- struct sockaddr_in6 from;
- struct iovec iov;
- char control_buf[CMSG_SPACE(36)];
- pingaddr.sin6 = lsa->u.sin6;
- if (source_lsa)
- xbind(pingsock, &source_lsa->u.sa, source_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(%s)", "ICMP6_FILTER");
- }
- #endif /*ICMP6_FILTER*/
- /* enable broadcast pings */
- setsockopt_broadcast(pingsock);
- /* set recv buf (needed if we can get lots of responses: flood ping,
- * broadcast ping etc) */
- sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
- setsockopt_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
- sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
- BUILD_BUG_ON(offsetof(struct icmp6_hdr, icmp6_cksum) != 2);
- setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
- /* request ttl info to be returned in ancillary data */
- setsockopt_1(pingsock, SOL_IPV6, IPV6_HOPLIMIT);
- if (if_index)
- pingaddr.sin6.sin6_scope_id = if_index;
- signal(SIGINT, print_stats_and_exit);
- 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 = G.rcv_packet;
- iov.iov_len = G.sizeof_rcv_packet;
- /* start the ping's going ... */
- send_ping:
- sendping6(0);
- /* listen for replies */
- 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_simple_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); - unaligned access */
- move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
- }
- }
- c = unpack6(G.rcv_packet, c, &from, hoplimit);
- if (pingcount && G.nreceived >= pingcount)
- break;
- if (c && (option_mask32 & OPT_A)) {
- goto send_ping;
- }
- }
- }
- #endif
- static void ping(len_and_sockaddr *lsa)
- {
- printf("PING %s (%s)", hostname, dotted);
- if (source_lsa) {
- printf(" from %s",
- xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
- }
- printf(": %d data bytes\n", datalen);
- create_icmp_socket(lsa);
- /* untested whether "-I addr" really works for IPv6: */
- if (str_I)
- setsockopt_bindtodevice(pingsock, str_I);
- G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
- G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
- #if ENABLE_PING6
- if (lsa->u.sa.sa_family == AF_INET6) {
- /* +4 reserves a place for timestamp, which may end up sitting
- * _after_ packet. Saves one if() - see sendping4/6() */
- G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
- ping6(lsa);
- } else
- #endif
- {
- G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
- ping4(lsa);
- }
- }
- static int common_ping_main(int opt, char **argv)
- {
- len_and_sockaddr *lsa;
- char *str_s, *str_p;
- char *str_i = (char*)"1";
- duration_t interval;
- INIT_G();
- opt |= getopt32(argv, "^"
- OPT_STRING
- /* exactly one arg; -v and -q don't mix */
- "\0" "=1:q--v:v--q",
- &pingcount, &str_s, &opt_ttl, &G.deadline_us, &timeout, &str_I, &str_p, &str_i
- );
- if (opt & OPT_s)
- datalen = xatou16(str_s); // -s
- if (opt & OPT_I) { // -I
- if_index = if_nametoindex(str_I);
- if (!if_index) {
- /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
- source_lsa = xdotted2sockaddr(str_I, 0);
- str_I = NULL; /* don't try to bind to device later */
- }
- }
- if (opt & OPT_p)
- G.pattern = xstrtou_range(str_p, 16, 0, 255);
- if (G.deadline_us) {
- unsigned d = G.deadline_us < INT_MAX/1000000 ? G.deadline_us : INT_MAX/1000000;
- G.deadline_us = 1 | ((d * 1000000) + monotonic_us());
- }
- interval = parse_duration_str(str_i);
- if (interval > INT_MAX/1000000)
- interval = INT_MAX/1000000;
- G.interval_us = interval * 1000000;
- myid = (uint16_t) getpid();
- /* we can use native-endian ident, but other Unix ping/traceroute
- * utils use *big-endian pid*, and e.g. traceroute on our machine may be
- * *not* from busybox, idents may collide. Follow the convention:
- */
- myid = htons(myid);
- hostname = argv[optind];
- #if ENABLE_PING6
- {
- sa_family_t af = AF_UNSPEC;
- if (opt & OPT_IPV4)
- af = AF_INET;
- if (opt & 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->u.sa.sa_family != lsa->u.sa.sa_family)
- /* leaking it here... */
- source_lsa = NULL;
- dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
- ping(lsa);
- print_stats_and_exit(0);
- /*return EXIT_SUCCESS;*/
- }
- #endif /* FEATURE_FANCY_PING */
- #if ENABLE_PING
- int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
- int ping_main(int argc UNUSED_PARAM, char **argv)
- {
- # if !ENABLE_FEATURE_FANCY_PING
- return common_ping_main(AF_UNSPEC, argv);
- # else
- return common_ping_main(0, argv);
- # endif
- }
- #endif
- #if ENABLE_PING6
- int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
- int ping6_main(int argc UNUSED_PARAM, char **argv)
- {
- # if !ENABLE_FEATURE_FANCY_PING
- return common_ping_main(AF_INET6, argv);
- # else
- return common_ping_main(OPT_IPV6, argv);
- # endif
- }
- #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.
- */
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