1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini ping implementation for busybox
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4 | *
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5 | * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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6 | *
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7 | * Adapted from the ping in netkit-base 0.10:
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8 | * Copyright (c) 1989 The Regents of the University of California.
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9 | * All rights reserved.
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10 | *
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11 | * This code is derived from software contributed to Berkeley by
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12 | * Mike Muuss.
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13 | *
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14 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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15 | */
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16 | /* from ping6.c:
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17 | * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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18 | *
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19 | * This version of ping is adapted from the ping in netkit-base 0.10,
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20 | * which is:
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21 | *
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22 | * Original copyright notice is retained at the end of this file.
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23 | *
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24 | * This version is an adaptation of ping.c from busybox.
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25 | * The code was modified by Bart Visscher <magick@linux-fan.com>
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26 | */
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27 |
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28 | #include <net/if.h>
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29 | #include <netinet/ip_icmp.h>
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30 | #include "libbb.h"
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31 |
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32 | #ifdef __BIONIC__
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33 | /* should be in netinet/ip_icmp.h */
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34 | # define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
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35 | # define ICMP_SOURCE_QUENCH 4 /* Source Quench */
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36 | # define ICMP_REDIRECT 5 /* Redirect (change route) */
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37 | # define ICMP_ECHO 8 /* Echo Request */
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38 | # define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
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39 | # define ICMP_PARAMETERPROB 12 /* Parameter Problem */
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40 | # define ICMP_TIMESTAMP 13 /* Timestamp Request */
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41 | # define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
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42 | # define ICMP_INFO_REQUEST 15 /* Information Request */
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43 | # define ICMP_INFO_REPLY 16 /* Information Reply */
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44 | # define ICMP_ADDRESS 17 /* Address Mask Request */
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45 | # define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
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46 | #endif
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47 |
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48 | //config:config PING
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49 | //config: bool "ping"
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50 | //config: default y
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51 | //config: select PLATFORM_LINUX
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52 | //config: help
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53 | //config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
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54 | //config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
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55 | //config:
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56 | //config:config PING6
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57 | //config: bool "ping6"
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58 | //config: default y
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59 | //config: depends on FEATURE_IPV6 && PING
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60 | //config: help
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61 | //config: This will give you a ping that can talk IPv6.
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62 | //config:
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63 | //config:config FEATURE_FANCY_PING
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64 | //config: bool "Enable fancy ping output"
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65 | //config: default y
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66 | //config: depends on PING
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67 | //config: help
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68 | //config: Make the output from the ping applet include statistics, and at the
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69 | //config: same time provide full support for ICMP packets.
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70 |
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71 | /* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
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72 | //applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
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73 | //applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
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74 |
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75 | //kbuild:lib-$(CONFIG_PING) += ping.o
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76 | //kbuild:lib-$(CONFIG_PING6) += ping.o
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77 |
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78 | //usage:#if !ENABLE_FEATURE_FANCY_PING
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79 | //usage:# define ping_trivial_usage
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80 | //usage: "HOST"
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81 | //usage:# define ping_full_usage "\n\n"
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82 | //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
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83 | //usage:# define ping6_trivial_usage
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84 | //usage: "HOST"
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85 | //usage:# define ping6_full_usage "\n\n"
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86 | //usage: "Send ICMP ECHO_REQUEST packets to network hosts"
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87 | //usage:#else
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88 | //usage:# define ping_trivial_usage
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89 | //usage: "[OPTIONS] HOST"
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90 | //usage:# define ping_full_usage "\n\n"
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91 | //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
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92 | //usage: "\n -4,-6 Force IP or IPv6 name resolution"
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93 | //usage: "\n -c CNT Send only CNT pings"
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94 | //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
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95 | //usage: "\n -t TTL Set TTL"
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96 | //usage: "\n -I IFACE/IP Use interface or IP address as source"
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97 | //usage: "\n -W SEC Seconds to wait for the first response (default:10)"
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98 | //usage: "\n (after all -c CNT packets are sent)"
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99 | //usage: "\n -w SEC Seconds until ping exits (default:infinite)"
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100 | //usage: "\n (can exit earlier with -c CNT)"
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101 | //usage: "\n -q Quiet, only displays output at start"
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102 | //usage: "\n and when finished"
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103 | //usage:
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104 | //usage:# define ping6_trivial_usage
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105 | //usage: "[OPTIONS] HOST"
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106 | //usage:# define ping6_full_usage "\n\n"
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107 | //usage: "Send ICMP ECHO_REQUEST packets to network hosts\n"
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108 | //usage: "\n -c CNT Send only CNT pings"
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109 | //usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)"
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110 | //usage: "\n -I IFACE/IP Use interface or IP address as source"
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111 | //usage: "\n -q Quiet, only displays output at start"
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112 | //usage: "\n and when finished"
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113 | //usage:
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114 | //usage:#endif
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115 | //usage:
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116 | //usage:#define ping_example_usage
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117 | //usage: "$ ping localhost\n"
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118 | //usage: "PING slag (127.0.0.1): 56 data bytes\n"
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119 | //usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
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120 | //usage: "\n"
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121 | //usage: "--- debian ping statistics ---\n"
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122 | //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
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123 | //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
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124 | //usage:#define ping6_example_usage
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125 | //usage: "$ ping6 ip6-localhost\n"
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126 | //usage: "PING ip6-localhost (::1): 56 data bytes\n"
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127 | //usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
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128 | //usage: "\n"
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129 | //usage: "--- ip6-localhost ping statistics ---\n"
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130 | //usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
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131 | //usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
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132 |
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133 | #if ENABLE_PING6
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134 | # include <netinet/icmp6.h>
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135 | /* I see RENUMBERED constants in bits/in.h - !!?
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136 | * What a fuck is going on with libc? Is it a glibc joke? */
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137 | # ifdef IPV6_2292HOPLIMIT
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138 | # undef IPV6_HOPLIMIT
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139 | # define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
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140 | # endif
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141 | #endif
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142 |
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143 | enum {
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144 | DEFDATALEN = 56,
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145 | MAXIPLEN = 60,
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146 | MAXICMPLEN = 76,
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147 | MAX_DUP_CHK = (8 * 128),
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148 | MAXWAIT = 10,
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149 | PINGINTERVAL = 1, /* 1 second */
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150 | };
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151 |
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152 | #if !ENABLE_FEATURE_FANCY_PING
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153 |
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154 | /* Simple version */
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155 |
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156 | struct globals {
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157 | char *hostname;
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158 | char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
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159 | } FIX_ALIASING;
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160 | #define G (*(struct globals*)&bb_common_bufsiz1)
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161 | #define INIT_G() do { } while (0)
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162 |
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163 | static void noresp(int ign UNUSED_PARAM)
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164 | {
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165 | printf("No response from %s\n", G.hostname);
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166 | exit(EXIT_FAILURE);
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167 | }
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168 |
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169 | static void ping4(len_and_sockaddr *lsa)
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170 | {
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171 | struct icmp *pkt;
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172 | int pingsock, c;
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173 |
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174 | pingsock = create_icmp_socket();
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175 |
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176 | pkt = (struct icmp *) G.packet;
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177 | memset(pkt, 0, sizeof(G.packet));
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178 | pkt->icmp_type = ICMP_ECHO;
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179 | pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
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180 |
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181 | xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
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182 |
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183 | /* listen for replies */
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184 | while (1) {
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185 | struct sockaddr_in from;
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186 | socklen_t fromlen = sizeof(from);
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187 |
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188 | c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
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189 | (struct sockaddr *) &from, &fromlen);
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190 | if (c < 0) {
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191 | if (errno != EINTR)
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192 | bb_perror_msg("recvfrom");
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193 | continue;
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194 | }
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195 | if (c >= 76) { /* ip + icmp */
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196 | struct iphdr *iphdr = (struct iphdr *) G.packet;
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197 |
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198 | pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
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199 | if (pkt->icmp_type == ICMP_ECHOREPLY)
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200 | break;
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201 | }
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202 | }
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203 | if (ENABLE_FEATURE_CLEAN_UP)
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204 | close(pingsock);
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205 | }
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206 |
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207 | #if ENABLE_PING6
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208 | static void ping6(len_and_sockaddr *lsa)
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209 | {
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210 | struct icmp6_hdr *pkt;
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211 | int pingsock, c;
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212 | int sockopt;
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213 |
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214 | pingsock = create_icmp6_socket();
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215 |
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216 | pkt = (struct icmp6_hdr *) G.packet;
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217 | memset(pkt, 0, sizeof(G.packet));
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218 | pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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219 |
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220 | sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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221 | setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
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222 |
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223 | xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
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224 |
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225 | /* listen for replies */
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226 | while (1) {
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227 | struct sockaddr_in6 from;
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228 | socklen_t fromlen = sizeof(from);
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229 |
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230 | c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
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231 | (struct sockaddr *) &from, &fromlen);
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232 | if (c < 0) {
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233 | if (errno != EINTR)
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234 | bb_perror_msg("recvfrom");
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235 | continue;
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236 | }
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237 | if (c >= ICMP_MINLEN) { /* icmp6_hdr */
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238 | pkt = (struct icmp6_hdr *) G.packet;
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239 | if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
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240 | break;
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241 | }
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242 | }
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243 | if (ENABLE_FEATURE_CLEAN_UP)
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244 | close(pingsock);
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245 | }
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246 | #endif
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247 |
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248 | #if !ENABLE_PING6
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249 | # define common_ping_main(af, argv) common_ping_main(argv)
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250 | #endif
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251 | static int common_ping_main(sa_family_t af, char **argv)
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252 | {
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253 | len_and_sockaddr *lsa;
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254 |
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255 | INIT_G();
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256 |
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257 | #if ENABLE_PING6
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258 | while ((++argv)[0] && argv[0][0] == '-') {
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259 | if (argv[0][1] == '4') {
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260 | af = AF_INET;
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261 | continue;
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262 | }
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263 | if (argv[0][1] == '6') {
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264 | af = AF_INET6;
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265 | continue;
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266 | }
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267 | bb_show_usage();
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268 | }
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269 | #else
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270 | argv++;
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271 | #endif
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272 |
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273 | G.hostname = *argv;
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274 | if (!G.hostname)
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275 | bb_show_usage();
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276 |
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277 | #if ENABLE_PING6
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278 | lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
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279 | #else
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280 | lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
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281 | #endif
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282 | /* Set timer _after_ DNS resolution */
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283 | signal(SIGALRM, noresp);
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284 | alarm(5); /* give the host 5000ms to respond */
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285 |
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286 | #if ENABLE_PING6
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287 | if (lsa->u.sa.sa_family == AF_INET6)
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288 | ping6(lsa);
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289 | else
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290 | #endif
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291 | ping4(lsa);
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292 | printf("%s is alive!\n", G.hostname);
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293 | return EXIT_SUCCESS;
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294 | }
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295 |
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296 |
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297 | #else /* FEATURE_FANCY_PING */
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298 |
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299 |
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300 | /* Full(er) version */
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301 |
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302 | #define OPT_STRING ("qvc:s:t:w:W:I:4" IF_PING6("6"))
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303 | enum {
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304 | OPT_QUIET = 1 << 0,
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305 | OPT_VERBOSE = 1 << 1,
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306 | OPT_c = 1 << 2,
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307 | OPT_s = 1 << 3,
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308 | OPT_t = 1 << 4,
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309 | OPT_w = 1 << 5,
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310 | OPT_W = 1 << 6,
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311 | OPT_I = 1 << 7,
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312 | OPT_IPV4 = 1 << 8,
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313 | OPT_IPV6 = (1 << 9) * ENABLE_PING6,
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314 | };
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315 |
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316 |
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317 | struct globals {
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318 | int pingsock;
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319 | int if_index;
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320 | char *str_I;
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321 | len_and_sockaddr *source_lsa;
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322 | unsigned datalen;
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323 | unsigned pingcount; /* must be int-sized */
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324 | unsigned opt_ttl;
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325 | unsigned long ntransmitted, nreceived, nrepeats;
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326 | uint16_t myid;
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327 | unsigned tmin, tmax; /* in us */
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328 | unsigned long long tsum; /* in us, sum of all times */
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329 | unsigned deadline;
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330 | unsigned timeout;
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331 | unsigned total_secs;
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332 | unsigned sizeof_rcv_packet;
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333 | char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
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334 | void *snd_packet; /* [datalen + ipv4/ipv6_const] */
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335 | const char *hostname;
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336 | const char *dotted;
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337 | union {
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338 | struct sockaddr sa;
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339 | struct sockaddr_in sin;
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340 | #if ENABLE_PING6
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341 | struct sockaddr_in6 sin6;
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342 | #endif
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343 | } pingaddr;
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344 | char rcvd_tbl[MAX_DUP_CHK / 8];
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345 | } FIX_ALIASING;
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346 | #define G (*(struct globals*)&bb_common_bufsiz1)
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347 | #define pingsock (G.pingsock )
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348 | #define if_index (G.if_index )
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349 | #define source_lsa (G.source_lsa )
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350 | #define str_I (G.str_I )
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351 | #define datalen (G.datalen )
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352 | #define ntransmitted (G.ntransmitted)
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353 | #define nreceived (G.nreceived )
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354 | #define nrepeats (G.nrepeats )
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355 | #define pingcount (G.pingcount )
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356 | #define opt_ttl (G.opt_ttl )
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357 | #define myid (G.myid )
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358 | #define tmin (G.tmin )
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359 | #define tmax (G.tmax )
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360 | #define tsum (G.tsum )
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361 | #define deadline (G.deadline )
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362 | #define timeout (G.timeout )
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363 | #define total_secs (G.total_secs )
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364 | #define hostname (G.hostname )
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365 | #define dotted (G.dotted )
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366 | #define pingaddr (G.pingaddr )
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367 | #define rcvd_tbl (G.rcvd_tbl )
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368 | void BUG_ping_globals_too_big(void);
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369 | #define INIT_G() do { \
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370 | if (sizeof(G) > COMMON_BUFSIZE) \
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371 | BUG_ping_globals_too_big(); \
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372 | pingsock = -1; \
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373 | datalen = DEFDATALEN; \
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374 | timeout = MAXWAIT; \
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375 | tmin = UINT_MAX; \
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376 | } while (0)
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377 |
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378 |
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379 | #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
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380 | #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
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381 | #define SET(bit) (A(bit) |= B(bit))
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382 | #define CLR(bit) (A(bit) &= (~B(bit)))
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383 | #define TST(bit) (A(bit) & B(bit))
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384 |
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385 | /**************************************************************************/
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386 |
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387 | static void print_stats_and_exit(int junk) NORETURN;
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388 | static void print_stats_and_exit(int junk UNUSED_PARAM)
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389 | {
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390 | signal(SIGINT, SIG_IGN);
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391 |
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392 | printf("\n--- %s ping statistics ---\n", hostname);
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393 | printf("%lu packets transmitted, ", ntransmitted);
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394 | printf("%lu packets received, ", nreceived);
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395 | if (nrepeats)
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396 | printf("%lu duplicates, ", nrepeats);
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397 | if (ntransmitted)
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398 | ntransmitted = (ntransmitted - nreceived) * 100 / ntransmitted;
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399 | printf("%lu%% packet loss\n", ntransmitted);
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400 | if (tmin != UINT_MAX) {
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401 | unsigned tavg = tsum / (nreceived + nrepeats);
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402 | printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
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403 | tmin / 1000, tmin % 1000,
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404 | tavg / 1000, tavg % 1000,
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405 | tmax / 1000, tmax % 1000);
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406 | }
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407 | /* if condition is true, exit with 1 -- 'failure' */
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408 | exit(nreceived == 0 || (deadline && nreceived < pingcount));
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409 | }
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410 |
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411 | static void sendping_tail(void (*sp)(int), int size_pkt)
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412 | {
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413 | int sz;
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414 |
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415 | CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
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416 | ntransmitted++;
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417 |
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418 | size_pkt += datalen;
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419 |
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420 | /* sizeof(pingaddr) can be larger than real sa size, but I think
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421 | * it doesn't matter */
|
---|
422 | sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
|
---|
423 | if (sz != size_pkt)
|
---|
424 | bb_error_msg_and_die(bb_msg_write_error);
|
---|
425 |
|
---|
426 | if (pingcount == 0 || deadline || ntransmitted < pingcount) {
|
---|
427 | /* Didn't send all pings yet - schedule next in 1s */
|
---|
428 | signal(SIGALRM, sp);
|
---|
429 | if (deadline) {
|
---|
430 | total_secs += PINGINTERVAL;
|
---|
431 | if (total_secs >= deadline)
|
---|
432 | signal(SIGALRM, print_stats_and_exit);
|
---|
433 | }
|
---|
434 | alarm(PINGINTERVAL);
|
---|
435 | } else { /* -c NN, and all NN are sent (and no deadline) */
|
---|
436 | /* Wait for the last ping to come back.
|
---|
437 | * -W timeout: wait for a response in seconds.
|
---|
438 | * Affects only timeout in absense of any responses,
|
---|
439 | * otherwise ping waits for two RTTs. */
|
---|
440 | unsigned expire = timeout;
|
---|
441 |
|
---|
442 | if (nreceived) {
|
---|
443 | /* approx. 2*tmax, in seconds (2 RTT) */
|
---|
444 | expire = tmax / (512*1024);
|
---|
445 | if (expire == 0)
|
---|
446 | expire = 1;
|
---|
447 | }
|
---|
448 | signal(SIGALRM, print_stats_and_exit);
|
---|
449 | alarm(expire);
|
---|
450 | }
|
---|
451 | }
|
---|
452 |
|
---|
453 | static void sendping4(int junk UNUSED_PARAM)
|
---|
454 | {
|
---|
455 | struct icmp *pkt = G.snd_packet;
|
---|
456 |
|
---|
457 | //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced
|
---|
458 | pkt->icmp_type = ICMP_ECHO;
|
---|
459 | /*pkt->icmp_code = 0;*/
|
---|
460 | pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
|
---|
461 | pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
|
---|
462 | pkt->icmp_id = myid;
|
---|
463 |
|
---|
464 | /* If datalen < 4, we store timestamp _past_ the packet,
|
---|
465 | * but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
|
---|
466 | */
|
---|
467 | /*if (datalen >= 4)*/
|
---|
468 | /* No hton: we'll read it back on the same machine */
|
---|
469 | *(uint32_t*)&pkt->icmp_dun = monotonic_us();
|
---|
470 |
|
---|
471 | pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN);
|
---|
472 |
|
---|
473 | sendping_tail(sendping4, ICMP_MINLEN);
|
---|
474 | }
|
---|
475 | #if ENABLE_PING6
|
---|
476 | static void sendping6(int junk UNUSED_PARAM)
|
---|
477 | {
|
---|
478 | struct icmp6_hdr *pkt = G.snd_packet;
|
---|
479 |
|
---|
480 | //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4);
|
---|
481 | pkt->icmp6_type = ICMP6_ECHO_REQUEST;
|
---|
482 | /*pkt->icmp6_code = 0;*/
|
---|
483 | /*pkt->icmp6_cksum = 0;*/
|
---|
484 | pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
|
---|
485 | pkt->icmp6_id = myid;
|
---|
486 |
|
---|
487 | /*if (datalen >= 4)*/
|
---|
488 | *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us();
|
---|
489 |
|
---|
490 | //TODO? pkt->icmp_cksum = inet_cksum(...);
|
---|
491 |
|
---|
492 | sendping_tail(sendping6, sizeof(struct icmp6_hdr));
|
---|
493 | }
|
---|
494 | #endif
|
---|
495 |
|
---|
496 | static const char *icmp_type_name(int id)
|
---|
497 | {
|
---|
498 | switch (id) {
|
---|
499 | case ICMP_ECHOREPLY: return "Echo Reply";
|
---|
500 | case ICMP_DEST_UNREACH: return "Destination Unreachable";
|
---|
501 | case ICMP_SOURCE_QUENCH: return "Source Quench";
|
---|
502 | case ICMP_REDIRECT: return "Redirect (change route)";
|
---|
503 | case ICMP_ECHO: return "Echo Request";
|
---|
504 | case ICMP_TIME_EXCEEDED: return "Time Exceeded";
|
---|
505 | case ICMP_PARAMETERPROB: return "Parameter Problem";
|
---|
506 | case ICMP_TIMESTAMP: return "Timestamp Request";
|
---|
507 | case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
|
---|
508 | case ICMP_INFO_REQUEST: return "Information Request";
|
---|
509 | case ICMP_INFO_REPLY: return "Information Reply";
|
---|
510 | case ICMP_ADDRESS: return "Address Mask Request";
|
---|
511 | case ICMP_ADDRESSREPLY: return "Address Mask Reply";
|
---|
512 | default: return "unknown ICMP type";
|
---|
513 | }
|
---|
514 | }
|
---|
515 | #if ENABLE_PING6
|
---|
516 | /* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
|
---|
517 | * the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
|
---|
518 | #ifndef MLD_LISTENER_QUERY
|
---|
519 | # define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
|
---|
520 | #endif
|
---|
521 | #ifndef MLD_LISTENER_REPORT
|
---|
522 | # define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
|
---|
523 | #endif
|
---|
524 | #ifndef MLD_LISTENER_REDUCTION
|
---|
525 | # define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
|
---|
526 | #endif
|
---|
527 | static const char *icmp6_type_name(int id)
|
---|
528 | {
|
---|
529 | switch (id) {
|
---|
530 | case ICMP6_DST_UNREACH: return "Destination Unreachable";
|
---|
531 | case ICMP6_PACKET_TOO_BIG: return "Packet too big";
|
---|
532 | case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
|
---|
533 | case ICMP6_PARAM_PROB: return "Parameter Problem";
|
---|
534 | case ICMP6_ECHO_REPLY: return "Echo Reply";
|
---|
535 | case ICMP6_ECHO_REQUEST: return "Echo Request";
|
---|
536 | case MLD_LISTENER_QUERY: return "Listener Query";
|
---|
537 | case MLD_LISTENER_REPORT: return "Listener Report";
|
---|
538 | case MLD_LISTENER_REDUCTION: return "Listener Reduction";
|
---|
539 | default: return "unknown ICMP type";
|
---|
540 | }
|
---|
541 | }
|
---|
542 | #endif
|
---|
543 |
|
---|
544 | static void unpack_tail(int sz, uint32_t *tp,
|
---|
545 | const char *from_str,
|
---|
546 | uint16_t recv_seq, int ttl)
|
---|
547 | {
|
---|
548 | const char *dupmsg = " (DUP!)";
|
---|
549 | unsigned triptime = triptime; /* for gcc */
|
---|
550 |
|
---|
551 | ++nreceived;
|
---|
552 |
|
---|
553 | if (tp) {
|
---|
554 | /* (int32_t) cast is for hypothetical 64-bit unsigned */
|
---|
555 | /* (doesn't hurt 32-bit real-world anyway) */
|
---|
556 | triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
|
---|
557 | tsum += triptime;
|
---|
558 | if (triptime < tmin)
|
---|
559 | tmin = triptime;
|
---|
560 | if (triptime > tmax)
|
---|
561 | tmax = triptime;
|
---|
562 | }
|
---|
563 |
|
---|
564 | if (TST(recv_seq % MAX_DUP_CHK)) {
|
---|
565 | ++nrepeats;
|
---|
566 | --nreceived;
|
---|
567 | } else {
|
---|
568 | SET(recv_seq % MAX_DUP_CHK);
|
---|
569 | dupmsg += 7;
|
---|
570 | }
|
---|
571 |
|
---|
572 | if (option_mask32 & OPT_QUIET)
|
---|
573 | return;
|
---|
574 |
|
---|
575 | printf("%d bytes from %s: seq=%u ttl=%d", sz,
|
---|
576 | from_str, recv_seq, ttl);
|
---|
577 | if (tp)
|
---|
578 | printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
|
---|
579 | puts(dupmsg);
|
---|
580 | fflush_all();
|
---|
581 | }
|
---|
582 | static void unpack4(char *buf, int sz, struct sockaddr_in *from)
|
---|
583 | {
|
---|
584 | struct icmp *icmppkt;
|
---|
585 | struct iphdr *iphdr;
|
---|
586 | int hlen;
|
---|
587 |
|
---|
588 | /* discard if too short */
|
---|
589 | if (sz < (datalen + ICMP_MINLEN))
|
---|
590 | return;
|
---|
591 |
|
---|
592 | /* check IP header */
|
---|
593 | iphdr = (struct iphdr *) buf;
|
---|
594 | hlen = iphdr->ihl << 2;
|
---|
595 | sz -= hlen;
|
---|
596 | icmppkt = (struct icmp *) (buf + hlen);
|
---|
597 | if (icmppkt->icmp_id != myid)
|
---|
598 | return; /* not our ping */
|
---|
599 |
|
---|
600 | if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
|
---|
601 | uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
|
---|
602 | uint32_t *tp = NULL;
|
---|
603 |
|
---|
604 | if (sz >= ICMP_MINLEN + sizeof(uint32_t))
|
---|
605 | tp = (uint32_t *) icmppkt->icmp_data;
|
---|
606 | unpack_tail(sz, tp,
|
---|
607 | inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
|
---|
608 | recv_seq, iphdr->ttl);
|
---|
609 | } else if (icmppkt->icmp_type != ICMP_ECHO) {
|
---|
610 | bb_error_msg("warning: got ICMP %d (%s)",
|
---|
611 | icmppkt->icmp_type,
|
---|
612 | icmp_type_name(icmppkt->icmp_type));
|
---|
613 | }
|
---|
614 | }
|
---|
615 | #if ENABLE_PING6
|
---|
616 | static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
|
---|
617 | {
|
---|
618 | struct icmp6_hdr *icmppkt;
|
---|
619 | char buf[INET6_ADDRSTRLEN];
|
---|
620 |
|
---|
621 | /* discard if too short */
|
---|
622 | if (sz < (datalen + sizeof(struct icmp6_hdr)))
|
---|
623 | return;
|
---|
624 |
|
---|
625 | icmppkt = (struct icmp6_hdr *) packet;
|
---|
626 | if (icmppkt->icmp6_id != myid)
|
---|
627 | return; /* not our ping */
|
---|
628 |
|
---|
629 | if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
|
---|
630 | uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
|
---|
631 | uint32_t *tp = NULL;
|
---|
632 |
|
---|
633 | if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
|
---|
634 | tp = (uint32_t *) &icmppkt->icmp6_data8[4];
|
---|
635 | unpack_tail(sz, tp,
|
---|
636 | inet_ntop(AF_INET6, &from->sin6_addr,
|
---|
637 | buf, sizeof(buf)),
|
---|
638 | recv_seq, hoplimit);
|
---|
639 | } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
|
---|
640 | bb_error_msg("warning: got ICMP %d (%s)",
|
---|
641 | icmppkt->icmp6_type,
|
---|
642 | icmp6_type_name(icmppkt->icmp6_type));
|
---|
643 | }
|
---|
644 | }
|
---|
645 | #endif
|
---|
646 |
|
---|
647 | static void ping4(len_and_sockaddr *lsa)
|
---|
648 | {
|
---|
649 | int sockopt;
|
---|
650 |
|
---|
651 | pingsock = create_icmp_socket();
|
---|
652 | pingaddr.sin = lsa->u.sin;
|
---|
653 | if (source_lsa) {
|
---|
654 | if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
|
---|
655 | &source_lsa->u.sa, source_lsa->len))
|
---|
656 | bb_error_msg_and_die("can't set multicast source interface");
|
---|
657 | xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
|
---|
658 | }
|
---|
659 | if (str_I)
|
---|
660 | setsockopt_bindtodevice(pingsock, str_I);
|
---|
661 |
|
---|
662 | /* enable broadcast pings */
|
---|
663 | setsockopt_broadcast(pingsock);
|
---|
664 |
|
---|
665 | /* set recv buf (needed if we can get lots of responses: flood ping,
|
---|
666 | * broadcast ping etc) */
|
---|
667 | sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
|
---|
668 | setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
|
---|
669 |
|
---|
670 | if (opt_ttl != 0) {
|
---|
671 | setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl));
|
---|
672 | /* above doesnt affect packets sent to bcast IP, so... */
|
---|
673 | setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl));
|
---|
674 | }
|
---|
675 |
|
---|
676 | signal(SIGINT, print_stats_and_exit);
|
---|
677 |
|
---|
678 | /* start the ping's going ... */
|
---|
679 | sendping4(0);
|
---|
680 |
|
---|
681 | /* listen for replies */
|
---|
682 | while (1) {
|
---|
683 | struct sockaddr_in from;
|
---|
684 | socklen_t fromlen = (socklen_t) sizeof(from);
|
---|
685 | int c;
|
---|
686 |
|
---|
687 | c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
|
---|
688 | (struct sockaddr *) &from, &fromlen);
|
---|
689 | if (c < 0) {
|
---|
690 | if (errno != EINTR)
|
---|
691 | bb_perror_msg("recvfrom");
|
---|
692 | continue;
|
---|
693 | }
|
---|
694 | unpack4(G.rcv_packet, c, &from);
|
---|
695 | if (pingcount && nreceived >= pingcount)
|
---|
696 | break;
|
---|
697 | }
|
---|
698 | }
|
---|
699 | #if ENABLE_PING6
|
---|
700 | extern int BUG_bad_offsetof_icmp6_cksum(void);
|
---|
701 | static void ping6(len_and_sockaddr *lsa)
|
---|
702 | {
|
---|
703 | int sockopt;
|
---|
704 | struct msghdr msg;
|
---|
705 | struct sockaddr_in6 from;
|
---|
706 | struct iovec iov;
|
---|
707 | char control_buf[CMSG_SPACE(36)];
|
---|
708 |
|
---|
709 | pingsock = create_icmp6_socket();
|
---|
710 | pingaddr.sin6 = lsa->u.sin6;
|
---|
711 | /* untested whether "-I addr" really works for IPv6: */
|
---|
712 | if (source_lsa)
|
---|
713 | xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
|
---|
714 | if (str_I)
|
---|
715 | setsockopt_bindtodevice(pingsock, str_I);
|
---|
716 |
|
---|
717 | #ifdef ICMP6_FILTER
|
---|
718 | {
|
---|
719 | struct icmp6_filter filt;
|
---|
720 | if (!(option_mask32 & OPT_VERBOSE)) {
|
---|
721 | ICMP6_FILTER_SETBLOCKALL(&filt);
|
---|
722 | ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
|
---|
723 | } else {
|
---|
724 | ICMP6_FILTER_SETPASSALL(&filt);
|
---|
725 | }
|
---|
726 | if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
|
---|
727 | sizeof(filt)) < 0)
|
---|
728 | bb_error_msg_and_die("setsockopt(ICMP6_FILTER)");
|
---|
729 | }
|
---|
730 | #endif /*ICMP6_FILTER*/
|
---|
731 |
|
---|
732 | /* enable broadcast pings */
|
---|
733 | setsockopt_broadcast(pingsock);
|
---|
734 |
|
---|
735 | /* set recv buf (needed if we can get lots of responses: flood ping,
|
---|
736 | * broadcast ping etc) */
|
---|
737 | sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
|
---|
738 | setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt));
|
---|
739 |
|
---|
740 | sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
|
---|
741 | if (offsetof(struct icmp6_hdr, icmp6_cksum) != 2)
|
---|
742 | BUG_bad_offsetof_icmp6_cksum();
|
---|
743 | setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt));
|
---|
744 |
|
---|
745 | /* request ttl info to be returned in ancillary data */
|
---|
746 | setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, &const_int_1, sizeof(const_int_1));
|
---|
747 |
|
---|
748 | if (if_index)
|
---|
749 | pingaddr.sin6.sin6_scope_id = if_index;
|
---|
750 |
|
---|
751 | signal(SIGINT, print_stats_and_exit);
|
---|
752 |
|
---|
753 | /* start the ping's going ... */
|
---|
754 | sendping6(0);
|
---|
755 |
|
---|
756 | /* listen for replies */
|
---|
757 | msg.msg_name = &from;
|
---|
758 | msg.msg_namelen = sizeof(from);
|
---|
759 | msg.msg_iov = &iov;
|
---|
760 | msg.msg_iovlen = 1;
|
---|
761 | msg.msg_control = control_buf;
|
---|
762 | iov.iov_base = G.rcv_packet;
|
---|
763 | iov.iov_len = G.sizeof_rcv_packet;
|
---|
764 | while (1) {
|
---|
765 | int c;
|
---|
766 | struct cmsghdr *mp;
|
---|
767 | int hoplimit = -1;
|
---|
768 | msg.msg_controllen = sizeof(control_buf);
|
---|
769 |
|
---|
770 | c = recvmsg(pingsock, &msg, 0);
|
---|
771 | if (c < 0) {
|
---|
772 | if (errno != EINTR)
|
---|
773 | bb_perror_msg("recvfrom");
|
---|
774 | continue;
|
---|
775 | }
|
---|
776 | for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
|
---|
777 | if (mp->cmsg_level == SOL_IPV6
|
---|
778 | && mp->cmsg_type == IPV6_HOPLIMIT
|
---|
779 | /* don't check len - we trust the kernel: */
|
---|
780 | /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
|
---|
781 | ) {
|
---|
782 | /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
|
---|
783 | move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
|
---|
784 | }
|
---|
785 | }
|
---|
786 | unpack6(G.rcv_packet, c, &from, hoplimit);
|
---|
787 | if (pingcount && nreceived >= pingcount)
|
---|
788 | break;
|
---|
789 | }
|
---|
790 | }
|
---|
791 | #endif
|
---|
792 |
|
---|
793 | static void ping(len_and_sockaddr *lsa)
|
---|
794 | {
|
---|
795 | printf("PING %s (%s)", hostname, dotted);
|
---|
796 | if (source_lsa) {
|
---|
797 | printf(" from %s",
|
---|
798 | xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
|
---|
799 | }
|
---|
800 | printf(": %d data bytes\n", datalen);
|
---|
801 |
|
---|
802 | G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
|
---|
803 | G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
|
---|
804 | #if ENABLE_PING6
|
---|
805 | if (lsa->u.sa.sa_family == AF_INET6) {
|
---|
806 | /* +4 reserves a place for timestamp, which may end up sitting
|
---|
807 | * _after_ packet. Saves one if() - see sendping4/6() */
|
---|
808 | G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
|
---|
809 | ping6(lsa);
|
---|
810 | } else
|
---|
811 | #endif
|
---|
812 | {
|
---|
813 | G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
|
---|
814 | ping4(lsa);
|
---|
815 | }
|
---|
816 | }
|
---|
817 |
|
---|
818 | static int common_ping_main(int opt, char **argv)
|
---|
819 | {
|
---|
820 | len_and_sockaddr *lsa;
|
---|
821 | char *str_s;
|
---|
822 |
|
---|
823 | INIT_G();
|
---|
824 |
|
---|
825 | /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
|
---|
826 | opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+";
|
---|
827 | opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I);
|
---|
828 | if (opt & OPT_s)
|
---|
829 | datalen = xatou16(str_s); // -s
|
---|
830 | if (opt & OPT_I) { // -I
|
---|
831 | if_index = if_nametoindex(str_I);
|
---|
832 | if (!if_index) {
|
---|
833 | /* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
|
---|
834 | source_lsa = xdotted2sockaddr(str_I, 0);
|
---|
835 | str_I = NULL; /* don't try to bind to device later */
|
---|
836 | }
|
---|
837 | }
|
---|
838 | myid = (uint16_t) getpid();
|
---|
839 | hostname = argv[optind];
|
---|
840 | #if ENABLE_PING6
|
---|
841 | {
|
---|
842 | sa_family_t af = AF_UNSPEC;
|
---|
843 | if (opt & OPT_IPV4)
|
---|
844 | af = AF_INET;
|
---|
845 | if (opt & OPT_IPV6)
|
---|
846 | af = AF_INET6;
|
---|
847 | lsa = xhost_and_af2sockaddr(hostname, 0, af);
|
---|
848 | }
|
---|
849 | #else
|
---|
850 | lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
|
---|
851 | #endif
|
---|
852 |
|
---|
853 | if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
|
---|
854 | /* leaking it here... */
|
---|
855 | source_lsa = NULL;
|
---|
856 |
|
---|
857 | dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
|
---|
858 | ping(lsa);
|
---|
859 | print_stats_and_exit(EXIT_SUCCESS);
|
---|
860 | /*return EXIT_SUCCESS;*/
|
---|
861 | }
|
---|
862 | #endif /* FEATURE_FANCY_PING */
|
---|
863 |
|
---|
864 |
|
---|
865 | int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
866 | int ping_main(int argc UNUSED_PARAM, char **argv)
|
---|
867 | {
|
---|
868 | #if !ENABLE_FEATURE_FANCY_PING
|
---|
869 | return common_ping_main(AF_UNSPEC, argv);
|
---|
870 | #else
|
---|
871 | return common_ping_main(0, argv);
|
---|
872 | #endif
|
---|
873 | }
|
---|
874 |
|
---|
875 | #if ENABLE_PING6
|
---|
876 | int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
877 | int ping6_main(int argc UNUSED_PARAM, char **argv)
|
---|
878 | {
|
---|
879 | # if !ENABLE_FEATURE_FANCY_PING
|
---|
880 | return common_ping_main(AF_INET6, argv);
|
---|
881 | # else
|
---|
882 | return common_ping_main(OPT_IPV6, argv);
|
---|
883 | # endif
|
---|
884 | }
|
---|
885 | #endif
|
---|
886 |
|
---|
887 | /* from ping6.c:
|
---|
888 | * Copyright (c) 1989 The Regents of the University of California.
|
---|
889 | * All rights reserved.
|
---|
890 | *
|
---|
891 | * This code is derived from software contributed to Berkeley by
|
---|
892 | * Mike Muuss.
|
---|
893 | *
|
---|
894 | * Redistribution and use in source and binary forms, with or without
|
---|
895 | * modification, are permitted provided that the following conditions
|
---|
896 | * are met:
|
---|
897 | * 1. Redistributions of source code must retain the above copyright
|
---|
898 | * notice, this list of conditions and the following disclaimer.
|
---|
899 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
900 | * notice, this list of conditions and the following disclaimer in the
|
---|
901 | * documentation and/or other materials provided with the distribution.
|
---|
902 | *
|
---|
903 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
|
---|
904 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
|
---|
905 | *
|
---|
906 | * 4. Neither the name of the University nor the names of its contributors
|
---|
907 | * may be used to endorse or promote products derived from this software
|
---|
908 | * without specific prior written permission.
|
---|
909 | *
|
---|
910 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
---|
911 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
912 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
913 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
---|
914 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
915 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
916 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
917 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
918 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
919 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
920 | * SUCH DAMAGE.
|
---|
921 | */
|
---|