X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fping.c;h=5d71fe8cc5ab0efaf6a720e90740f47a4543318e;hb=6c46eed6e935db43dedbff1d026e4cf68f0bc67e;hp=8b49df1bd29fc3438b32fe7c463153ec03fd341f;hpb=919c10dd8884aa4876ec6ca407a12f3793f2bab1;p=oweals%2Fbusybox.git diff --git a/networking/ping.c b/networking/ping.c index 8b49df1bd..5d71fe8cc 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -1,279 +1,636 @@ /* vi: set sw=4 ts=4: */ /* - * $Id: ping.c,v 1.56 2004/03/15 08:28:48 andersen Exp $ * Mini ping implementation for busybox * * Copyright (C) 1999 by Randolph Chung * * Adapted from the ping in netkit-base 0.10: * Copyright (c) 1989 The Regents of the University of California. - * Derived from software contributed to Berkeley by Mike Muuss. + * All rights reserved. * - * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + * 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 + * + * 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 */ -#include -#include -#include -#include -#include - -#include -#include +#include #include -#include -#include -#include -#include -#include -#include -#include -#include -#include "busybox.h" +#include "libbb.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 + +//config:config PING +//config: bool "ping" +//config: default y +//config: select PLATFORM_LINUX +//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" +//config: default y +//config: depends on FEATURE_IPV6 && PING +//config: help +//config: This will give you a ping that can talk IPv6. +//config: +//config:config FEATURE_FANCY_PING +//config: bool "Enable fancy ping output" +//config: default y +//config: depends on PING +//config: help +//config: Make the output from the ping applet include statistics, and at the +//config: same time provide full support for ICMP packets. + +/* 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_REQUEST packets to network hosts" +//usage:# define ping6_trivial_usage +//usage: "HOST" +//usage:# define ping6_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts" +//usage:#else +//usage:# define ping_trivial_usage +//usage: "[OPTIONS] HOST" +//usage:# define ping_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts\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 -t TTL Set TTL" +//usage: "\n -I IFACE/IP Use interface or IP address as source" +//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 displays output at start" +//usage: "\n and when finished" +//usage: +//usage:# define ping6_trivial_usage +//usage: "[OPTIONS] HOST" +//usage:# define ping6_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts\n" +//usage: "\n -c CNT Send only CNT pings" +//usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)" +//usage: "\n -I IFACE/IP Use interface or IP address as source" +//usage: "\n -q Quiet, only displays output at start" +//usage: "\n and when finished" +//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" + +#if ENABLE_PING6 +# include +/* 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 /* second */ + PINGINTERVAL = 1, /* 1 second */ + pingsock = 0, }; -static void ping(const char *host); - -/* common routines */ - -static int in_cksum(unsigned short *buf, int sz) +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 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; + 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_perror_msg_and_die(bb_msg_can_not_create_raw_socket); +#if defined(__linux__) || defined(__APPLE__) + /* We don't have root privileges. Try SOCK_DGRAM instead. + * Linux needs net.ipv4.ping_group_range for this to work. + * MacOSX allows ICMP_ECHO, ICMP_TSTAMP or ICMP_MASKREQ + */ +#if ENABLE_PING6 + if (lsa->u.sa.sa_family == AF_INET6) + sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_ICMPV6); + else +#endif + sock = socket(AF_INET, SOCK_DGRAM, 1); /* 1 == ICMP */ + if (sock < 0) +#endif + bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); } - sum = (sum >> 16) + (sum & 0xFFFF); - sum += (sum >> 16); - ans = ~sum; - return ans; + xmove_fd(sock, pingsock); } -#ifndef CONFIG_FEATURE_FANCY_PING +#if !ENABLE_FEATURE_FANCY_PING -/* simple version */ +/* Simple version */ -static char *hostname; +struct globals { + char *hostname; + char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; +} FIX_ALIASING; +#define G (*(struct globals*)&bb_common_bufsiz1) +#define INIT_G() do { } while (0) -static void noresp(int ign) +static void noresp(int ign UNUSED_PARAM) { - printf("No response from %s\n", hostname); + printf("No response from %s\n", G.hostname); exit(EXIT_FAILURE); } -static void ping(const char *host) +static void ping4(len_and_sockaddr *lsa) { - struct hostent *h; - struct sockaddr_in pingaddr; struct icmp *pkt; - int pingsock, c; - char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; - - pingsock = create_icmp_socket(); - - memset(&pingaddr, 0, sizeof(struct sockaddr_in)); + int c; - pingaddr.sin_family = AF_INET; - h = xgethostbyname(host); - memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr)); - hostname = h->h_name; - - pkt = (struct icmp *) packet; - memset(pkt, 0, sizeof(packet)); + pkt = (struct icmp *) G.packet; + /*memset(pkt, 0, sizeof(G.packet)); already is */ 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(struct sockaddr_in)); + pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet)); - if (c < 0) { - if (ENABLE_FEATURE_CLEAN_UP) close(pingsock); - bb_perror_msg_and_die("sendto"); - } + xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len); - signal(SIGALRM, noresp); - alarm(5); /* give the host 5000ms to respond */ /* listen for replies */ while (1) { +#if 0 struct sockaddr_in from; socklen_t fromlen = sizeof(from); - c = recvfrom(pingsock, packet, sizeof(packet), 0, + 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) - continue; - bb_perror_msg("recvfrom"); + if (errno != EINTR) + bb_perror_msg("recvfrom"); continue; } if (c >= 76) { /* ip + icmp */ - struct iphdr *iphdr = (struct iphdr *) packet; + struct iphdr *iphdr = (struct iphdr *) G.packet; - pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */ + pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */ if (pkt->icmp_type == ICMP_ECHOREPLY) break; } } - if (ENABLE_FEATURE_CLEAN_UP) close(pingsock); - printf("%s is alive!\n", hostname); - return; + if (ENABLE_FEATURE_CLEAN_UP) + close(pingsock); +} + +#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; + + sockopt = offsetof(struct icmp6_hdr, icmp6_cksum); + setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(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_perror_msg("recvfrom"); + continue; + } + if (c >= ICMP_MINLEN) { /* icmp6_hdr */ + if (pkt->icmp6_type == ICMP6_ECHO_REPLY) + break; + } + } + if (ENABLE_FEATURE_CLEAN_UP) + close(pingsock); } +#endif -int ping_main(int argc, char **argv) +#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) { - argc--; + 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++; - if (argc < 1) +#endif + + G.hostname = *argv; + if (!G.hostname) bb_show_usage(); - ping(*argv); + +#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); +#if ENABLE_PING6 + if (lsa->u.sa.sa_family == AF_INET6) + ping6(lsa); + else +#endif + ping4(lsa); + printf("%s is alive!\n", G.hostname); return EXIT_SUCCESS; } -#else /* ! CONFIG_FEATURE_FANCY_PING */ -/* full(er) version */ +#else /* FEATURE_FANCY_PING */ + -#define OPT_STRING "qc:s:I:" +/* Full(er) version */ + +#define OPT_STRING ("qvc:s:t:w:W:I:n4" IF_PING6("6")) enum { OPT_QUIET = 1 << 0, + OPT_VERBOSE = 1 << 1, + OPT_c = 1 << 2, + OPT_s = 1 << 3, + OPT_t = 1 << 4, + OPT_w = 1 << 5, + OPT_W = 1 << 6, + OPT_I = 1 << 7, + /*OPT_n = 1 << 8, - ignored */ + OPT_IPV4 = 1 << 9, + OPT_IPV6 = (1 << 10) * ENABLE_PING6, }; -static struct sockaddr_in pingaddr; -static struct sockaddr_in sourceaddr; -static int pingsock = -1; -static unsigned datalen; /* intentionally uninitialized to work around gcc bug */ - -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 struct hostent *hostent; - -static void sendping(int); -static void pingstats(int); -static void unpack(char *, int, struct sockaddr_in *); - -#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) +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; + unsigned tmin, tmax; /* in us */ + unsigned long long tsum; /* in us, sum of all times */ + unsigned deadline; + unsigned timeout; + unsigned total_secs; + 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 deadline (G.deadline ) +#define timeout (G.timeout ) +#define total_secs (G.total_secs ) +#define hostname (G.hostname ) +#define dotted (G.dotted ) +#define pingaddr (G.pingaddr ) +#define rcvd_tbl (G.rcvd_tbl ) +void BUG_ping_globals_too_big(void); +#define INIT_G() do { \ + if (sizeof(G) > COMMON_BUFSIZE) \ + BUG_ping_globals_too_big(); \ + 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) { - int status; + unsigned long ul; + unsigned long nrecv; signal(SIGINT, SIG_IGN); - printf("\n--- %s ping statistics ---\n", hostent->h_name); - printf("%lu packets transmitted, ", ntransmitted); - printf("%lu packets received, ", nreceived); - if (nrepeats) - printf("%lu duplicates, ", nrepeats); - if (ntransmitted) - printf("%lu%% packet loss\n", - (ntransmitted - nreceived) * 100 / 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); + 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 || (deadline && nrecv < pingcount)); } -static void sendping(int junk) +static void sendping_tail(void (*sp)(int), int size_pkt) { - struct icmp *pkt; - int i; - char packet[datalen + ICMP_MINLEN]; + int sz; + + 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_error_msg_and_die(bb_msg_write_error); + + if (pingcount == 0 || deadline || G.ntransmitted < pingcount) { + /* Didn't send all pings yet - schedule next in 1s */ + signal(SIGALRM, sp); + if (deadline) { + total_secs += PINGINTERVAL; + if (total_secs >= deadline) + signal(SIGALRM, print_stats_and_exit); + } + alarm(PINGINTERVAL); + } else { /* -c NN, and all NN are sent (and no deadline) */ + /* Wait for the last ping to come back. + * -W timeout: wait for a response in seconds. + * Affects only timeout in absense 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); + } +} - pkt = (struct icmp *) packet; +static void sendping4(int junk UNUSED_PARAM) +{ + struct icmp *pkt = G.snd_packet; + //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced 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_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; - CLR(ntohs(pkt->icmp_seq) % MAX_DUP_CHK); - ntransmitted++; - gettimeofday((struct timeval *) &pkt->icmp_dun, NULL); - pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet)); + /* 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 = monotonic_us(); - i = sendto(pingsock, packet, sizeof(packet), 0, - (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in)); + pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN); - if (i < 0) - bb_perror_msg_and_die("sendto"); - else if ((size_t)i != sizeof(packet)) - bb_error_msg_and_die("ping wrote %d chars; %d expected", i, - (int)sizeof(packet)); + sendping_tail(sendping4, ICMP_MINLEN); +} +#if ENABLE_PING6 +static void sendping6(int junk UNUSED_PARAM) +{ + struct icmp6_hdr *pkt = G.snd_packet; - signal(SIGALRM, sendping); - 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); - } + //memset(pkt, 0, 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]) = monotonic_us(); + + //TODO? pkt->icmp_cksum = inet_cksum(...); + + sendping_tail(sendping6, sizeof(struct icmp6_hdr)); } +#endif -static char *icmp_type_name(int id) +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 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"; + 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(char *buf, int sz, struct sockaddr_in *from) +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 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); + int hlen; /* discard if too short */ if (sz < (datalen + ICMP_MINLEN)) @@ -288,155 +645,322 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from) return; /* not our ping */ if (icmppkt->icmp_type == ICMP_ECHOREPLY) { - u_int16_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; + 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); + } else if (icmppkt->icmp_type != ICMP_ECHO) { + bb_error_msg("warning: got ICMP %d (%s)", + icmppkt->icmp_type, + icmp_type_name(icmppkt->icmp_type)); + } +} +#if ENABLE_PING6 +static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit) +{ + struct icmp6_hdr *icmppkt; + char buf[INET6_ADDRSTRLEN]; - triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100); - tsum += triptime; - if (triptime < tmin) - tmin = triptime; - if (triptime > tmax) - tmax = triptime; + /* discard if too short */ + if (sz < (datalen + sizeof(struct icmp6_hdr))) + return; - if (TST(recv_seq % MAX_DUP_CHK)) { - ++nrepeats; - --nreceived; - dupflag = 1; - } else { - SET(recv_seq % MAX_DUP_CHK); - dupflag = 0; - } + icmppkt = (struct icmp6_hdr *) packet; + if (icmppkt->icmp6_id != myid) + return; /* not our ping */ - 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 (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); + } 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)); + } } +#endif -static void ping(const char *host) +static void ping4(len_and_sockaddr *lsa) { - char packet[datalen + MAXIPLEN + MAXICMPLEN]; int sockopt; - pingsock = create_icmp_socket(); + pingaddr.sin = lsa->u.sin; + if (source_lsa) { + if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF, + &source_lsa->u.sa, source_lsa->len)) + bb_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(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt)); - if (sourceaddr.sin_addr.s_addr) { - xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr)); + if (opt_ttl != 0) { + setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl)); + /* above doesnt affect packets sent to bcast IP, so... */ + setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl)); } - memset(&pingaddr, 0, sizeof(struct sockaddr_in)); + signal(SIGINT, print_stats_and_exit); + + /* start the ping's going ... */ + sendping4(0); - pingaddr.sin_family = AF_INET; - hostent = xgethostbyname(host); - if (hostent->h_addrtype != AF_INET) - bb_error_msg_and_die("unknown address type; only AF_INET is currently supported"); + /* listen for replies */ + while (1) { + struct sockaddr_in from; + socklen_t fromlen = (socklen_t) sizeof(from); + int c; - memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr)); + c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0, + (struct sockaddr *) &from, &fromlen); + if (c < 0) { + if (errno != EINTR) + bb_perror_msg("recvfrom"); + continue; + } + unpack4(G.rcv_packet, c, &from); + if (pingcount && G.nreceived >= pingcount) + break; + } +} +#if ENABLE_PING6 +extern int BUG_bad_offsetof_icmp6_cksum(void); +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(ICMP6_FILTER)"); + } +#endif /*ICMP6_FILTER*/ /* enable broadcast pings */ setsockopt_broadcast(pingsock); - /* set recv buf for broadcast pings */ - sockopt = 48 * 1024; - setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt, - sizeof(sockopt)); + /* 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(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt)); - printf("PING %s (%s)", - hostent->h_name, - inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr)); - if (sourceaddr.sin_addr.s_addr) { - printf(" from %s", - inet_ntoa(*(struct in_addr *) &sourceaddr.sin_addr.s_addr)); - } - printf(": %d data bytes\n", datalen); + 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)); - signal(SIGINT, pingstats); + if (if_index) + pingaddr.sin6.sin6_scope_id = if_index; + + signal(SIGINT, print_stats_and_exit); /* start the ping's going ... */ - sendping(0); + 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 = G.rcv_packet; + iov.iov_len = G.sizeof_rcv_packet; while (1) { - struct sockaddr_in from; - socklen_t fromlen = (socklen_t) sizeof(from); int c; + struct cmsghdr *mp; + int hoplimit = -1; + msg.msg_controllen = sizeof(control_buf); - if ((c = recvfrom(pingsock, packet, sizeof(packet), 0, - (struct sockaddr *) &from, &fromlen)) < 0) { - if (errno == EINTR) - continue; - bb_perror_msg("recvfrom"); + c = recvmsg(pingsock, &msg, 0); + if (c < 0) { + if (errno != EINTR) + bb_perror_msg("recvfrom"); continue; } - unpack(packet, c, &from); - if (pingcount > 0 && nreceived >= pingcount) + 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)); + } + } + unpack6(G.rcv_packet, c, &from, hoplimit); + if (pingcount && G.nreceived >= pingcount) break; } - pingstats(0); } +#endif -/* TODO: consolidate ether-wake.c, dnsd.c, ifupdown.c, nslookup.c - * versions of below thing. BTW we have far too many "%u.%u.%u.%u" too... -*/ -static int parse_nipquad(const char *str, struct sockaddr_in* addr) +static void ping(len_and_sockaddr *lsa) { - char dummy; - unsigned i1, i2, i3, i4; - if (sscanf(str, "%u.%u.%u.%u%c", - &i1, &i2, &i3, &i4, &dummy) == 4 - && ( (i1|i2|i3|i4) <= 0xff ) - ) { - uint8_t* ptr = (uint8_t*)&addr->sin_addr; - ptr[0] = i1; - ptr[1] = i2; - ptr[2] = i3; - ptr[3] = i4; - return 0; + 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); } - return 1; /* error */ } -int ping_main(int argc, char **argv) +static int common_ping_main(int opt, char **argv) { - char *opt_c, *opt_s, *opt_I; - - datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */ - - /* exactly one argument needed */ - opt_complementary = "=1"; - getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I); - if (option_mask32 & 2) pingcount = xatoul(opt_c); // -c - if (option_mask32 & 4) datalen = xatou16(opt_s); // -s - if (option_mask32 & 8) { // -I -/* TODO: ping6 accepts iface too: - if_index = if_nametoindex(*argv); - if (!if_index) ... -make it true for ping. */ - if (parse_nipquad(opt_I, &sourceaddr)) - bb_show_usage(); + len_and_sockaddr *lsa; + char *str_s; + + INIT_G(); + + /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */ + opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+"; + opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &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 */ + } + } + myid = (uint16_t) getpid(); + 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(EXIT_SUCCESS); + /*return EXIT_SUCCESS;*/ +} +#endif /* FEATURE_FANCY_PING */ - myid = (int16_t) getpid(); - ping(argv[optind]); - return EXIT_SUCCESS; + +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 +} + +#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 /* ! CONFIG_FEATURE_FANCY_PING */ +#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. + * + * 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. + */