1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * $Id: ping6.c,v 1.6 2004/03/15 08:28:48 andersen Exp $
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4 | * Mini ping implementation for busybox
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5 | *
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6 | * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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7 | *
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8 | * This program is free software; you can redistribute it and/or modify
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9 | * it under the terms of the GNU General Public License as published by
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10 | * the Free Software Foundation; either version 2 of the License, or
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11 | * (at your option) any later version.
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12 | *
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13 | * This program is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 | * General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU General Public License
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19 | * along with this program; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21 | *
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22 | * This version of ping is adapted from the ping in netkit-base 0.10,
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23 | * which is:
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24 | *
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25 | * Copyright (c) 1989 The Regents of the University of California.
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26 | * All rights reserved.
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27 | *
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28 | * This code is derived from software contributed to Berkeley by
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29 | * Mike Muuss.
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30 | *
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31 | * Original copyright notice is retained at the end of this file.
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32 | *
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33 | * This version is an adaptation of ping.c from busybox.
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34 | * The code was modified by Bart Visscher <magick@linux-fan.com>
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35 | */
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36 |
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37 | #include <sys/param.h>
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38 | #include <sys/socket.h>
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39 | #include <sys/file.h>
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40 | #include <sys/times.h>
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41 | #include <signal.h>
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42 |
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43 | #include <netinet/in.h>
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44 | #include <netinet/ip6.h>
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45 | #include <netinet/icmp6.h>
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46 | #include <arpa/inet.h>
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47 | #include <net/if.h>
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48 | #include <netdb.h>
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49 | #include <stdio.h>
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50 | #include <stdlib.h>
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51 | #include <errno.h>
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52 | #include <unistd.h>
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53 | #include <string.h>
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54 | #include <stdlib.h>
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55 | #include <stddef.h> /* offsetof */
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56 | #include "busybox.h"
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57 |
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58 | enum {
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59 | DEFDATALEN = 56,
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60 | MAXIPLEN = 60,
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61 | MAXICMPLEN = 76,
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62 | MAXPACKET = 65468,
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63 | MAX_DUP_CHK = (8 * 128),
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64 | MAXWAIT = 10,
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65 | PINGINTERVAL = 1 /* second */
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66 | };
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67 |
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68 | #define O_QUIET (1 << 0)
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69 | #define O_VERBOSE (1 << 1)
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70 |
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71 | #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
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72 | #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
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73 | #define SET(bit) (A(bit) |= B(bit))
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74 | #define CLR(bit) (A(bit) &= (~B(bit)))
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75 | #define TST(bit) (A(bit) & B(bit))
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76 |
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77 | static void ping(const char *host);
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78 |
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79 | /* simple version */
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80 | #ifndef CONFIG_FEATURE_FANCY_PING6
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81 | static struct hostent *h;
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82 |
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83 | void noresp(int ign)
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84 | {
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85 | printf("No response from %s\n", h->h_name);
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86 | exit(EXIT_FAILURE);
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87 | }
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88 |
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89 | static void ping(const char *host)
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90 | {
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91 | struct sockaddr_in6 pingaddr;
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92 | struct icmp6_hdr *pkt;
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93 | int pingsock, c;
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94 | int sockopt;
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95 | char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
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96 |
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97 | pingsock = create_icmp6_socket();
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98 |
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99 | memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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100 |
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101 | pingaddr.sin6_family = AF_INET6;
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102 | h = xgethostbyname2(host, AF_INET6);
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103 | memcpy(&pingaddr.sin6_addr, h->h_addr, sizeof(pingaddr.sin6_addr));
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104 |
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105 | pkt = (struct icmp6_hdr *) packet;
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106 | memset(pkt, 0, sizeof(packet));
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107 | pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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108 |
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109 | sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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110 | setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
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111 | sizeof(sockopt));
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112 |
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113 | c = sendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), 0,
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114 | (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
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115 |
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116 | if (c < 0 || c != sizeof(packet))
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117 | bb_perror_msg_and_die("sendto");
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118 |
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119 | signal(SIGALRM, noresp);
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120 | alarm(5); /* give the host 5000ms to respond */
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121 | /* listen for replies */
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122 | while (1) {
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123 | struct sockaddr_in6 from;
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124 | size_t fromlen = sizeof(from);
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125 |
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126 | if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
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127 | (struct sockaddr *) &from, &fromlen)) < 0) {
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128 | if (errno == EINTR)
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129 | continue;
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130 | bb_perror_msg("recvfrom");
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131 | continue;
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132 | }
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133 | if (c >= 8) { /* icmp6_hdr */
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134 | pkt = (struct icmp6_hdr *) packet;
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135 | if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
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136 | break;
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137 | }
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138 | }
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139 | printf("%s is alive!\n", h->h_name);
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140 | return;
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141 | }
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142 |
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143 | int ping6_main(int argc, char **argv)
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144 | {
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145 | argc--;
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146 | argv++;
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147 | if (argc < 1)
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148 | bb_show_usage();
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149 | ping(*argv);
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150 | return EXIT_SUCCESS;
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151 | }
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152 |
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153 | #else /* ! CONFIG_FEATURE_FANCY_PING6 */
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154 | /* full(er) version */
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155 | static struct sockaddr_in6 pingaddr;
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156 | static int pingsock = -1;
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157 | static int datalen; /* intentionally uninitialized to work around gcc bug */
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158 | static char* ifname;
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159 |
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160 | static long ntransmitted, nreceived, nrepeats, pingcount;
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161 | static int myid, options;
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162 | static unsigned long tmin = ULONG_MAX, tmax, tsum;
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163 | static char rcvd_tbl[MAX_DUP_CHK / 8];
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164 |
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165 | # ifdef CONFIG_FEATURE_FANCY_PING
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166 | extern
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167 | # endif
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168 | struct hostent *hostent;
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169 |
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170 | static void sendping(int);
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171 | static void pingstats(int);
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172 | static void unpack(char *, int, struct sockaddr_in6 *, int);
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173 |
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174 | /**************************************************************************/
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175 |
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176 | static void pingstats(int junk)
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177 | {
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178 | int status;
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179 |
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180 | signal(SIGINT, SIG_IGN);
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181 |
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182 | printf("\n--- %s ping statistics ---\n", hostent->h_name);
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183 | printf("%ld packets transmitted, ", ntransmitted);
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184 | printf("%ld packets received, ", nreceived);
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185 | if (nrepeats)
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186 | printf("%ld duplicates, ", nrepeats);
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187 | if (ntransmitted)
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188 | printf("%ld%% packet loss\n",
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189 | (ntransmitted - nreceived) * 100 / ntransmitted);
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190 | if (nreceived)
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191 | printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
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192 | tmin / 10, tmin % 10,
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193 | (tsum / (nreceived + nrepeats)) / 10,
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194 | (tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
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195 | if (nreceived != 0)
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196 | status = EXIT_SUCCESS;
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197 | else
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198 | status = EXIT_FAILURE;
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199 | exit(status);
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200 | }
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201 |
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202 | static void sendping(int junk)
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203 | {
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204 | struct icmp6_hdr *pkt;
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205 | int i;
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206 | char packet[datalen + sizeof (struct icmp6_hdr)];
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207 |
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208 | pkt = (struct icmp6_hdr *) packet;
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209 |
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210 | pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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211 | pkt->icmp6_code = 0;
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212 | pkt->icmp6_cksum = 0;
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213 | pkt->icmp6_seq = SWAP_BE16(ntransmitted++);
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214 | pkt->icmp6_id = myid;
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215 | CLR(pkt->icmp6_seq % MAX_DUP_CHK);
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216 |
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217 | gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
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218 |
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219 | i = sendto(pingsock, packet, sizeof(packet), 0,
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220 | (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
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221 |
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222 | if (i < 0)
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223 | bb_perror_msg_and_die("sendto");
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224 | else if ((size_t)i != sizeof(packet))
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225 | bb_error_msg_and_die("ping wrote %d chars; %d expected", i,
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226 | (int)sizeof(packet));
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227 |
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228 | signal(SIGALRM, sendping);
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229 | if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
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230 | alarm(PINGINTERVAL);
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231 | } else { /* done, wait for the last ping to come back */
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232 | /* todo, don't necessarily need to wait so long... */
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233 | signal(SIGALRM, pingstats);
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234 | alarm(MAXWAIT);
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235 | }
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236 | }
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237 |
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238 | /* RFC3542 changed some definitions from RFC2292 for no good reason, whee !
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239 | * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
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240 | #ifndef MLD_LISTENER_QUERY
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241 | # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
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242 | #endif
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243 | #ifndef MLD_LISTENER_REPORT
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244 | # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
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245 | #endif
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246 | #ifndef MLD_LISTENER_REDUCTION
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247 | # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
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248 | #endif
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249 | static char *icmp6_type_name (int id)
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250 | {
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251 | switch (id) {
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252 | case ICMP6_DST_UNREACH: return "Destination Unreachable";
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253 | case ICMP6_PACKET_TOO_BIG: return "Packet too big";
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254 | case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
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255 | case ICMP6_PARAM_PROB: return "Parameter Problem";
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256 | case ICMP6_ECHO_REPLY: return "Echo Reply";
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257 | case ICMP6_ECHO_REQUEST: return "Echo Request";
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258 | case MLD_LISTENER_QUERY: return "Listener Query";
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259 | case MLD_LISTENER_REPORT: return "Listener Report";
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260 | case MLD_LISTENER_REDUCTION: return "Listener Reduction";
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261 | default: return "unknown ICMP type";
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262 | }
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263 | }
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264 |
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265 | static void unpack(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
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266 | {
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267 | struct icmp6_hdr *icmppkt;
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268 | struct timeval tv, *tp;
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269 | int dupflag;
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270 | unsigned long triptime;
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271 | char buf[INET6_ADDRSTRLEN];
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272 |
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273 | gettimeofday(&tv, NULL);
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274 |
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275 | /* discard if too short */
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276 | if (sz < (datalen + sizeof(struct icmp6_hdr)))
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277 | return;
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278 |
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279 | icmppkt = (struct icmp6_hdr *) packet;
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280 |
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281 | if (icmppkt->icmp6_id != myid)
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282 | return; /* not our ping */
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283 |
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284 | if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
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285 | ++nreceived;
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286 | tp = (struct timeval *) &icmppkt->icmp6_data8[4];
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287 |
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288 | if ((tv.tv_usec -= tp->tv_usec) < 0) {
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289 | --tv.tv_sec;
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290 | tv.tv_usec += 1000000;
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291 | }
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292 | tv.tv_sec -= tp->tv_sec;
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293 |
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294 | triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
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295 | tsum += triptime;
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296 | if (triptime < tmin)
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297 | tmin = triptime;
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298 | if (triptime > tmax)
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299 | tmax = triptime;
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300 |
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301 | if (TST(icmppkt->icmp6_seq % MAX_DUP_CHK)) {
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302 | ++nrepeats;
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303 | --nreceived;
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304 | dupflag = 1;
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305 | } else {
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306 | SET(icmppkt->icmp6_seq % MAX_DUP_CHK);
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307 | dupflag = 0;
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308 | }
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309 |
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310 | if (options & O_QUIET)
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311 | return;
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312 |
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313 | printf("%d bytes from %s: icmp6_seq=%u", sz,
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314 | inet_ntop(AF_INET6, &pingaddr.sin6_addr,
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315 | buf, sizeof(buf)),
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316 | icmppkt->icmp6_seq);
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317 | printf(" ttl=%d time=%lu.%lu ms", hoplimit,
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318 | triptime / 10, triptime % 10);
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319 | if (dupflag)
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320 | printf(" (DUP!)");
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321 | printf("\n");
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322 | } else
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323 | if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST)
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324 | bb_error_msg("Warning: Got ICMP %d (%s)",
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325 | icmppkt->icmp6_type, icmp6_type_name (icmppkt->icmp6_type));
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326 | }
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327 |
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328 | static void ping(const char *host)
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329 | {
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330 | char packet[datalen + MAXIPLEN + MAXICMPLEN];
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331 | char buf[INET6_ADDRSTRLEN];
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332 | int sockopt;
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333 | struct msghdr msg;
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334 | struct sockaddr_in6 from;
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335 | struct iovec iov;
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336 | char control_buf[CMSG_SPACE(36)];
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337 |
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338 | pingsock = create_icmp6_socket();
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339 |
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340 | memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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341 |
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342 | pingaddr.sin6_family = AF_INET6;
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343 | hostent = xgethostbyname2(host, AF_INET6);
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344 | if (hostent->h_addrtype != AF_INET6)
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345 | bb_error_msg_and_die("unknown address type; only AF_INET6 is currently supported.");
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346 |
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347 | memcpy(&pingaddr.sin6_addr, hostent->h_addr, sizeof(pingaddr.sin6_addr));
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348 |
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349 | #ifdef ICMP6_FILTER
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350 | {
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351 | struct icmp6_filter filt;
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352 | if (!(options & O_VERBOSE)) {
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353 | ICMP6_FILTER_SETBLOCKALL(&filt);
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354 | #if 0
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355 | if ((options & F_FQDN) || (options & F_FQDNOLD) ||
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356 | (options & F_NODEADDR) || (options & F_SUPTYPES))
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357 | ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
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358 | else
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359 | #endif
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360 | ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
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361 | } else {
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362 | ICMP6_FILTER_SETPASSALL(&filt);
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363 | }
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364 | if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
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365 | sizeof(filt)) < 0)
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366 | bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
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367 | }
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368 | #endif /*ICMP6_FILTER*/
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369 |
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370 | /* enable broadcast pings */
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371 | sockopt = 1;
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372 | setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
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373 | sizeof(sockopt));
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374 |
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375 | /* set recv buf for broadcast pings */
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376 | sockopt = 48 * 1024;
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377 | setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
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378 | sizeof(sockopt));
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379 |
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380 | sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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381 | setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
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382 | sizeof(sockopt));
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383 |
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384 | sockopt = 1;
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385 | setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
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386 | sizeof(sockopt));
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387 |
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388 | if (ifname) {
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389 | if ((pingaddr.sin6_scope_id = if_nametoindex(ifname)) == 0)
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390 | bb_error_msg_and_die("%s: invalid interface name", ifname);
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391 | }
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392 |
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393 | printf("PING %s (%s): %d data bytes\n",
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394 | hostent->h_name,
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395 | inet_ntop(AF_INET6, &pingaddr.sin6_addr,
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396 | buf, sizeof(buf)),
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397 | datalen);
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398 |
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399 | signal(SIGINT, pingstats);
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400 |
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401 | /* start the ping's going ... */
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402 | sendping(0);
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403 |
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404 | /* listen for replies */
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405 | msg.msg_name=&from;
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406 | msg.msg_namelen=sizeof(from);
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407 | msg.msg_iov=&iov;
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408 | msg.msg_iovlen=1;
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409 | msg.msg_control=control_buf;
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410 | iov.iov_base=packet;
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411 | iov.iov_len=sizeof(packet);
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412 | while (1) {
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413 | int c;
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414 | struct cmsghdr *cmsgptr = NULL;
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415 | int hoplimit=-1;
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416 | msg.msg_controllen=sizeof(control_buf);
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417 |
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418 | if ((c = recvmsg(pingsock, &msg, 0)) < 0) {
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419 | if (errno == EINTR)
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420 | continue;
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421 | bb_perror_msg("recvfrom");
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422 | continue;
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423 | }
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424 | for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
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425 | cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) {
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426 | if (cmsgptr->cmsg_level == SOL_IPV6 &&
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427 | cmsgptr->cmsg_type == IPV6_HOPLIMIT ) {
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428 | hoplimit=*(int*)CMSG_DATA(cmsgptr);
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429 | }
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430 | }
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431 | unpack(packet, c, &from, hoplimit);
|
---|
432 | if (pingcount > 0 && nreceived >= pingcount)
|
---|
433 | break;
|
---|
434 | }
|
---|
435 | pingstats(0);
|
---|
436 | }
|
---|
437 |
|
---|
438 | int ping6_main(int argc, char **argv)
|
---|
439 | {
|
---|
440 | char *thisarg;
|
---|
441 |
|
---|
442 | datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
|
---|
443 |
|
---|
444 | argc--;
|
---|
445 | argv++;
|
---|
446 | options = 0;
|
---|
447 | /* Parse any options */
|
---|
448 | while (argc >= 1 && **argv == '-') {
|
---|
449 | thisarg = *argv;
|
---|
450 | thisarg++;
|
---|
451 | switch (*thisarg) {
|
---|
452 | case 'v':
|
---|
453 | options &= ~O_QUIET;
|
---|
454 | options |= O_VERBOSE;
|
---|
455 | break;
|
---|
456 | case 'q':
|
---|
457 | options &= ~O_VERBOSE;
|
---|
458 | options |= O_QUIET;
|
---|
459 | break;
|
---|
460 | case 'c':
|
---|
461 | if (--argc <= 0)
|
---|
462 | bb_show_usage();
|
---|
463 | argv++;
|
---|
464 | pingcount = atoi(*argv);
|
---|
465 | break;
|
---|
466 | case 's':
|
---|
467 | if (--argc <= 0)
|
---|
468 | bb_show_usage();
|
---|
469 | argv++;
|
---|
470 | datalen = atoi(*argv);
|
---|
471 | break;
|
---|
472 | case 'I':
|
---|
473 | if (--argc <= 0)
|
---|
474 | bb_show_usage();
|
---|
475 | argv++;
|
---|
476 | ifname = *argv;
|
---|
477 | break;
|
---|
478 | default:
|
---|
479 | bb_show_usage();
|
---|
480 | }
|
---|
481 | argc--;
|
---|
482 | argv++;
|
---|
483 | }
|
---|
484 | if (argc < 1)
|
---|
485 | bb_show_usage();
|
---|
486 |
|
---|
487 | myid = getpid() & 0xFFFF;
|
---|
488 | ping(*argv);
|
---|
489 | return EXIT_SUCCESS;
|
---|
490 | }
|
---|
491 | #endif /* ! CONFIG_FEATURE_FANCY_PING6 */
|
---|
492 |
|
---|
493 | /*
|
---|
494 | * Copyright (c) 1989 The Regents of the University of California.
|
---|
495 | * All rights reserved.
|
---|
496 | *
|
---|
497 | * This code is derived from software contributed to Berkeley by
|
---|
498 | * Mike Muuss.
|
---|
499 | *
|
---|
500 | * Redistribution and use in source and binary forms, with or without
|
---|
501 | * modification, are permitted provided that the following conditions
|
---|
502 | * are met:
|
---|
503 | * 1. Redistributions of source code must retain the above copyright
|
---|
504 | * notice, this list of conditions and the following disclaimer.
|
---|
505 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
506 | * notice, this list of conditions and the following disclaimer in the
|
---|
507 | * documentation and/or other materials provided with the distribution.
|
---|
508 | *
|
---|
509 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
|
---|
510 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
|
---|
511 | *
|
---|
512 | * 4. Neither the name of the University nor the names of its contributors
|
---|
513 | * may be used to endorse or promote products derived from this software
|
---|
514 | * without specific prior written permission.
|
---|
515 | *
|
---|
516 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
---|
517 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
518 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
519 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
---|
520 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
521 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
522 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
523 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
524 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
525 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
526 | * SUCH DAMAGE.
|
---|
527 | */
|
---|