1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini netstat implementation(s) for busybox
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4 | * based in part on the netstat implementation from net-tools.
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5 | *
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6 | * Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com>
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7 | *
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8 | * 2002-04-20
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9 | * IPV6 support added by Bart Visscher <magick@linux-fan.com>
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10 | *
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11 | * 2008-07-10
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12 | * optional '-p' flag support ported from net-tools by G. Somlo <somlo@cmu.edu>
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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 |
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17 | #include "libbb.h"
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18 | #include "inet_common.h"
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19 |
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20 | //usage:#define netstat_trivial_usage
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21 | //usage: "[-"IF_ROUTE("r")"al] [-tuwx] [-en"IF_FEATURE_NETSTAT_WIDE("W")IF_FEATURE_NETSTAT_PRG("p")"]"
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22 | //usage:#define netstat_full_usage "\n\n"
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23 | //usage: "Display networking information\n"
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24 | //usage: IF_ROUTE(
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25 | //usage: "\n -r Routing table"
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26 | //usage: )
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27 | //usage: "\n -a All sockets"
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28 | //usage: "\n -l Listening sockets"
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29 | //usage: "\n Else: connected sockets"
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30 | //usage: "\n -t TCP sockets"
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31 | //usage: "\n -u UDP sockets"
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32 | //usage: "\n -w Raw sockets"
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33 | //usage: "\n -x Unix sockets"
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34 | //usage: "\n Else: all socket types"
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35 | //usage: "\n -e Other/more information"
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36 | //usage: "\n -n Don't resolve names"
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37 | //usage: IF_FEATURE_NETSTAT_WIDE(
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38 | //usage: "\n -W Wide display"
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39 | //usage: )
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40 | //usage: IF_FEATURE_NETSTAT_PRG(
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41 | //usage: "\n -p Show PID/program name for sockets"
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42 | //usage: )
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43 |
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44 | #define NETSTAT_OPTS "laentuwx" \
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45 | IF_ROUTE( "r") \
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46 | IF_FEATURE_NETSTAT_WIDE("W") \
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47 | IF_FEATURE_NETSTAT_PRG( "p")
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48 |
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49 | enum {
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50 | OPT_sock_listen = 1 << 0, // l
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51 | OPT_sock_all = 1 << 1, // a
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52 | OPT_extended = 1 << 2, // e
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53 | OPT_noresolve = 1 << 3, // n
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54 | OPT_sock_tcp = 1 << 4, // t
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55 | OPT_sock_udp = 1 << 5, // u
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56 | OPT_sock_raw = 1 << 6, // w
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57 | OPT_sock_unix = 1 << 7, // x
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58 | OPTBIT_x = 7,
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59 | IF_ROUTE( OPTBIT_ROUTE,)
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60 | IF_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,)
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61 | IF_FEATURE_NETSTAT_PRG( OPTBIT_PRG ,)
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62 | OPT_route = IF_ROUTE( (1 << OPTBIT_ROUTE)) + 0, // r
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63 | OPT_wide = IF_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W
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64 | OPT_prg = IF_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG )) + 0, // p
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65 | };
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66 |
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67 | #define NETSTAT_CONNECTED 0x01
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68 | #define NETSTAT_LISTENING 0x02
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69 | #define NETSTAT_NUMERIC 0x04
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70 | /* Must match getopt32 option string */
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71 | #define NETSTAT_TCP 0x10
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72 | #define NETSTAT_UDP 0x20
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73 | #define NETSTAT_RAW 0x40
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74 | #define NETSTAT_UNIX 0x80
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75 | #define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)
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76 |
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77 |
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78 | enum {
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79 | TCP_ESTABLISHED = 1,
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80 | TCP_SYN_SENT,
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81 | TCP_SYN_RECV,
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82 | TCP_FIN_WAIT1,
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83 | TCP_FIN_WAIT2,
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84 | TCP_TIME_WAIT,
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85 | TCP_CLOSE,
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86 | TCP_CLOSE_WAIT,
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87 | TCP_LAST_ACK,
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88 | TCP_LISTEN,
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89 | TCP_CLOSING, /* now a valid state */
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90 | };
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91 |
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92 | static const char *const tcp_state[] = {
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93 | "",
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94 | "ESTABLISHED",
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95 | "SYN_SENT",
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96 | "SYN_RECV",
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97 | "FIN_WAIT1",
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98 | "FIN_WAIT2",
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99 | "TIME_WAIT",
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100 | "CLOSE",
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101 | "CLOSE_WAIT",
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102 | "LAST_ACK",
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103 | "LISTEN",
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104 | "CLOSING"
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105 | };
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106 |
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107 | typedef enum {
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108 | SS_FREE = 0, /* not allocated */
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109 | SS_UNCONNECTED, /* unconnected to any socket */
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110 | SS_CONNECTING, /* in process of connecting */
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111 | SS_CONNECTED, /* connected to socket */
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112 | SS_DISCONNECTING /* in process of disconnecting */
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113 | } socket_state;
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114 |
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115 | #define SO_ACCEPTCON (1<<16) /* performed a listen */
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116 | #define SO_WAITDATA (1<<17) /* wait data to read */
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117 | #define SO_NOSPACE (1<<18) /* no space to write */
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118 |
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119 | #define ADDR_NORMAL_WIDTH 23
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120 | /* When there are IPv6 connections the IPv6 addresses will be
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121 | * truncated to none-recognition. The '-W' option makes the
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122 | * address columns wide enough to accomodate for longest possible
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123 | * IPv6 addresses, i.e. addresses of the form
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124 | * xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd
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125 | */
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126 | #define ADDR_WIDE 51 /* INET6_ADDRSTRLEN + 5 for the port number */
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127 | #if ENABLE_FEATURE_NETSTAT_WIDE
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128 | # define FMT_NET_CONN_DATA "%s %6ld %6ld %-*s %-*s %-12s"
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129 | # define FMT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-*s %-*s State %s\n"
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130 | #else
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131 | # define FMT_NET_CONN_DATA "%s %6ld %6ld %-23s %-23s %-12s"
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132 | # define FMT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State %s\n"
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133 | #endif
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134 |
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135 | #define PROGNAME_WIDTH 20
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136 | #define PROGNAME_WIDTH_STR "20"
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137 | /* PROGNAME_WIDTH chars: 12345678901234567890 */
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138 | #define PROGNAME_BANNER "PID/Program name "
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139 |
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140 | struct prg_node {
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141 | struct prg_node *next;
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142 | long inode;
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143 | char name[PROGNAME_WIDTH];
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144 | };
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145 |
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146 | #define PRG_HASH_SIZE 211
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147 |
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148 | struct globals {
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149 | smallint flags;
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150 | #if ENABLE_FEATURE_NETSTAT_PRG
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151 | smallint prg_cache_loaded;
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152 | struct prg_node *prg_hash[PRG_HASH_SIZE];
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153 | #endif
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154 | #if ENABLE_FEATURE_NETSTAT_PRG
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155 | const char *progname_banner;
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156 | #endif
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157 | #if ENABLE_FEATURE_NETSTAT_WIDE
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158 | unsigned addr_width;
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159 | #endif
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160 | };
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161 | #define G (*ptr_to_globals)
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162 | #define flags (G.flags )
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163 | #define prg_cache_loaded (G.prg_cache_loaded)
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164 | #define prg_hash (G.prg_hash )
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165 | #if ENABLE_FEATURE_NETSTAT_PRG
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166 | # define progname_banner (G.progname_banner )
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167 | #else
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168 | # define progname_banner ""
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169 | #endif
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170 | #define INIT_G() do { \
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171 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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172 | flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO; \
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173 | } while (0)
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174 |
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175 |
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176 | #if ENABLE_FEATURE_NETSTAT_PRG
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177 |
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178 | /* Deliberately truncating long to unsigned *int* */
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179 | #define PRG_HASHIT(x) ((unsigned)(x) % PRG_HASH_SIZE)
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180 |
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181 | static void prg_cache_add(long inode, char *name)
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182 | {
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183 | unsigned hi = PRG_HASHIT(inode);
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184 | struct prg_node **pnp, *pn;
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185 |
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186 | prg_cache_loaded = 2;
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187 | for (pnp = prg_hash + hi; (pn = *pnp) != NULL; pnp = &pn->next) {
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188 | if (pn->inode == inode) {
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189 | /* Some warning should be appropriate here
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190 | * as we got multiple processes for one i-node */
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191 | return;
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192 | }
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193 | }
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194 | *pnp = xzalloc(sizeof(struct prg_node));
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195 | pn = *pnp;
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196 | pn->inode = inode;
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197 | safe_strncpy(pn->name, name, PROGNAME_WIDTH);
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198 | }
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199 |
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200 | static const char *prg_cache_get(long inode)
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201 | {
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202 | unsigned hi = PRG_HASHIT(inode);
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203 | struct prg_node *pn;
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204 |
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205 | for (pn = prg_hash[hi]; pn; pn = pn->next)
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206 | if (pn->inode == inode)
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207 | return pn->name;
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208 | return "-";
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209 | }
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210 |
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211 | #if ENABLE_FEATURE_CLEAN_UP
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212 | static void prg_cache_clear(void)
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213 | {
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214 | struct prg_node **pnp, *pn;
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215 |
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216 | for (pnp = prg_hash; pnp < prg_hash + PRG_HASH_SIZE; pnp++) {
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217 | while ((pn = *pnp) != NULL) {
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218 | *pnp = pn->next;
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219 | free(pn);
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220 | }
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221 | }
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222 | }
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223 | #else
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224 | #define prg_cache_clear() ((void)0)
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225 | #endif
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226 |
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227 | static long extract_socket_inode(const char *lname)
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228 | {
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229 | long inode = -1;
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230 |
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231 | if (strncmp(lname, "socket:[", sizeof("socket:[")-1) == 0) {
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232 | /* "socket:[12345]", extract the "12345" as inode */
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233 | inode = bb_strtoul(lname + sizeof("socket:[")-1, (char**)&lname, 0);
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234 | if (*lname != ']')
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235 | inode = -1;
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236 | } else if (strncmp(lname, "[0000]:", sizeof("[0000]:")-1) == 0) {
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237 | /* "[0000]:12345", extract the "12345" as inode */
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238 | inode = bb_strtoul(lname + sizeof("[0000]:")-1, NULL, 0);
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239 | if (errno) /* not NUL terminated? */
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240 | inode = -1;
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241 | }
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242 |
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243 | #if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */
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244 | if (errno == ERANGE)
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245 | inode = -1;
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246 | #endif
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247 | return inode;
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248 | }
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249 |
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250 | static int FAST_FUNC add_to_prg_cache_if_socket(const char *fileName,
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251 | struct stat *statbuf UNUSED_PARAM,
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252 | void *pid_slash_progname,
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253 | int depth UNUSED_PARAM)
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254 | {
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255 | char *linkname;
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256 | long inode;
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257 |
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258 | linkname = xmalloc_readlink(fileName);
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259 | if (linkname != NULL) {
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260 | inode = extract_socket_inode(linkname);
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261 | free(linkname);
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262 | if (inode >= 0)
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263 | prg_cache_add(inode, (char *)pid_slash_progname);
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264 | }
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265 | return TRUE;
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266 | }
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267 |
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268 | static int FAST_FUNC dir_act(const char *fileName,
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269 | struct stat *statbuf UNUSED_PARAM,
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270 | void *userData UNUSED_PARAM,
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271 | int depth)
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272 | {
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273 | const char *pid;
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274 | char *pid_slash_progname;
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275 | char proc_pid_fname[sizeof("/proc/%u/cmdline") + sizeof(long)*3];
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276 | char cmdline_buf[512];
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277 | int n, len;
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278 |
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279 | if (depth == 0) /* "/proc" itself */
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280 | return TRUE; /* continue looking one level below /proc */
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281 |
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282 | pid = fileName + sizeof("/proc/")-1; /* point after "/proc/" */
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283 | if (!isdigit(pid[0])) /* skip /proc entries which aren't processes */
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284 | return SKIP;
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285 |
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286 | len = snprintf(proc_pid_fname, sizeof(proc_pid_fname), "%s/cmdline", fileName);
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287 | n = open_read_close(proc_pid_fname, cmdline_buf, sizeof(cmdline_buf) - 1);
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288 | if (n < 0)
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289 | return FALSE;
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290 | cmdline_buf[n] = '\0';
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291 |
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292 | /* go through all files in /proc/PID/fd and check whether they are sockets */
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293 | strcpy(proc_pid_fname + len - (sizeof("cmdline")-1), "fd");
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294 | pid_slash_progname = concat_path_file(pid, bb_basename(cmdline_buf)); /* "PID/argv0" */
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295 | n = recursive_action(proc_pid_fname,
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296 | ACTION_RECURSE | ACTION_QUIET,
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297 | add_to_prg_cache_if_socket,
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298 | NULL,
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299 | (void *)pid_slash_progname,
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300 | 0);
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301 | free(pid_slash_progname);
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302 |
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303 | if (!n)
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304 | return FALSE; /* signal permissions error to caller */
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305 |
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306 | return SKIP; /* caller should not recurse further into this dir */
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307 | }
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308 |
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309 | static void prg_cache_load(void)
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310 | {
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311 | int load_ok;
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312 |
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313 | prg_cache_loaded = 1;
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314 | load_ok = recursive_action("/proc", ACTION_RECURSE | ACTION_QUIET,
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315 | NULL, dir_act, NULL, 0);
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316 | if (load_ok)
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317 | return;
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318 |
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319 | if (prg_cache_loaded == 1)
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320 | bb_error_msg("can't scan /proc - are you root?");
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321 | else
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322 | bb_error_msg("showing only processes with your user ID");
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323 | }
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324 |
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325 | #else
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326 |
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327 | #define prg_cache_clear() ((void)0)
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328 |
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329 | #endif //ENABLE_FEATURE_NETSTAT_PRG
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330 |
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331 |
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332 | #if ENABLE_FEATURE_IPV6
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333 | static void build_ipv6_addr(char* local_addr, struct sockaddr_in6* localaddr)
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334 | {
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335 | char addr6[INET6_ADDRSTRLEN];
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336 | struct in6_addr in6;
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337 |
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338 | sscanf(local_addr, "%08X%08X%08X%08X",
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339 | &in6.s6_addr32[0], &in6.s6_addr32[1],
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340 | &in6.s6_addr32[2], &in6.s6_addr32[3]);
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341 | inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6));
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342 | inet_pton(AF_INET6, addr6, &localaddr->sin6_addr);
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343 |
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344 | localaddr->sin6_family = AF_INET6;
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345 | }
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346 | #endif
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347 |
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348 | static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr)
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349 | {
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350 | sscanf(local_addr, "%X", &localaddr->sin_addr.s_addr);
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351 | localaddr->sin_family = AF_INET;
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352 | }
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353 |
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354 | static const char *get_sname(int port, const char *proto, int numeric)
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355 | {
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356 | if (!port)
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357 | return "*";
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358 | if (!numeric) {
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359 | struct servent *se = getservbyport(port, proto);
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360 | if (se)
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361 | return se->s_name;
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362 | }
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363 | /* hummm, we may return static buffer here!! */
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364 | return itoa(ntohs(port));
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365 | }
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366 |
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367 | static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric)
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368 | {
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369 | char *host, *host_port;
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370 |
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371 | /* Code which used "*" for INADDR_ANY is removed: it's ambiguous
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372 | * in IPv6, while "0.0.0.0" is not. */
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373 |
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374 | host = numeric ? xmalloc_sockaddr2dotted_noport(addr)
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375 | : xmalloc_sockaddr2host_noport(addr);
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376 |
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377 | host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric));
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378 | free(host);
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379 | return host_port;
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380 | }
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381 |
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382 | struct inet_params {
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383 | int local_port, rem_port, state, uid;
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384 | union {
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385 | struct sockaddr sa;
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386 | struct sockaddr_in sin;
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387 | #if ENABLE_FEATURE_IPV6
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388 | struct sockaddr_in6 sin6;
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389 | #endif
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390 | } localaddr, remaddr;
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391 | unsigned long rxq, txq, inode;
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392 | };
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393 |
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394 | static int scan_inet_proc_line(struct inet_params *param, char *line)
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395 | {
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396 | int num;
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397 | /* IPv6 /proc files use 32-char hex representation
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398 | * of IPv6 address, followed by :PORT_IN_HEX
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399 | */
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400 | char local_addr[33], rem_addr[33]; /* 32 + 1 for NUL */
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401 |
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402 | num = sscanf(line,
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403 | "%*d: %32[0-9A-Fa-f]:%X "
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404 | "%32[0-9A-Fa-f]:%X %X "
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405 | "%lX:%lX %*X:%*X "
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406 | "%*X %d %*d %ld ",
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407 | local_addr, ¶m->local_port,
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408 | rem_addr, ¶m->rem_port, ¶m->state,
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409 | ¶m->txq, ¶m->rxq,
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410 | ¶m->uid, ¶m->inode);
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411 | if (num < 9) {
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412 | return 1; /* error */
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413 | }
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414 |
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415 | if (strlen(local_addr) > 8) {
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416 | #if ENABLE_FEATURE_IPV6
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417 | build_ipv6_addr(local_addr, ¶m->localaddr.sin6);
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418 | build_ipv6_addr(rem_addr, ¶m->remaddr.sin6);
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419 | #endif
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420 | } else {
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421 | build_ipv4_addr(local_addr, ¶m->localaddr.sin);
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422 | build_ipv4_addr(rem_addr, ¶m->remaddr.sin);
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423 | }
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424 | return 0;
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425 | }
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426 |
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427 | static void print_inet_line(struct inet_params *param,
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428 | const char *state_str, const char *proto, int is_connected)
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---|
429 | {
|
---|
430 | if ((is_connected && (flags & NETSTAT_CONNECTED))
|
---|
431 | || (!is_connected && (flags & NETSTAT_LISTENING))
|
---|
432 | ) {
|
---|
433 | char *l = ip_port_str(
|
---|
434 | ¶m->localaddr.sa, param->local_port,
|
---|
435 | proto, flags & NETSTAT_NUMERIC);
|
---|
436 | char *r = ip_port_str(
|
---|
437 | ¶m->remaddr.sa, param->rem_port,
|
---|
438 | proto, flags & NETSTAT_NUMERIC);
|
---|
439 | printf(FMT_NET_CONN_DATA,
|
---|
440 | proto, param->rxq, param->txq,
|
---|
441 | IF_FEATURE_NETSTAT_WIDE(G.addr_width,) l,
|
---|
442 | IF_FEATURE_NETSTAT_WIDE(G.addr_width,) r,
|
---|
443 | state_str);
|
---|
444 | #if ENABLE_FEATURE_NETSTAT_PRG
|
---|
445 | if (option_mask32 & OPT_prg)
|
---|
446 | printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(param->inode));
|
---|
447 | #endif
|
---|
448 | bb_putchar('\n');
|
---|
449 | free(l);
|
---|
450 | free(r);
|
---|
451 | }
|
---|
452 | }
|
---|
453 |
|
---|
454 | static int FAST_FUNC tcp_do_one(char *line)
|
---|
455 | {
|
---|
456 | struct inet_params param;
|
---|
457 |
|
---|
458 | memset(¶m, 0, sizeof(param));
|
---|
459 | if (scan_inet_proc_line(¶m, line))
|
---|
460 | return 1;
|
---|
461 |
|
---|
462 | print_inet_line(¶m, tcp_state[param.state], "tcp", param.rem_port);
|
---|
463 | return 0;
|
---|
464 | }
|
---|
465 |
|
---|
466 | #if ENABLE_FEATURE_IPV6
|
---|
467 | # define NOT_NULL_ADDR(A) ( \
|
---|
468 | ( (A.sa.sa_family == AF_INET6) \
|
---|
469 | && (A.sin6.sin6_addr.s6_addr32[0] | A.sin6.sin6_addr.s6_addr32[1] | \
|
---|
470 | A.sin6.sin6_addr.s6_addr32[2] | A.sin6.sin6_addr.s6_addr32[3]) \
|
---|
471 | ) || ( \
|
---|
472 | (A.sa.sa_family == AF_INET) \
|
---|
473 | && A.sin.sin_addr.s_addr != 0 \
|
---|
474 | ) \
|
---|
475 | )
|
---|
476 | #else
|
---|
477 | # define NOT_NULL_ADDR(A) (A.sin.sin_addr.s_addr)
|
---|
478 | #endif
|
---|
479 |
|
---|
480 | static int FAST_FUNC udp_do_one(char *line)
|
---|
481 | {
|
---|
482 | int have_remaddr;
|
---|
483 | const char *state_str;
|
---|
484 | struct inet_params param;
|
---|
485 |
|
---|
486 | memset(¶m, 0, sizeof(param)); /* otherwise we display garbage IPv6 scope_ids */
|
---|
487 | if (scan_inet_proc_line(¶m, line))
|
---|
488 | return 1;
|
---|
489 |
|
---|
490 | state_str = "UNKNOWN";
|
---|
491 | switch (param.state) {
|
---|
492 | case TCP_ESTABLISHED:
|
---|
493 | state_str = "ESTABLISHED";
|
---|
494 | break;
|
---|
495 | case TCP_CLOSE:
|
---|
496 | state_str = "";
|
---|
497 | break;
|
---|
498 | }
|
---|
499 |
|
---|
500 | have_remaddr = NOT_NULL_ADDR(param.remaddr);
|
---|
501 | print_inet_line(¶m, state_str, "udp", have_remaddr);
|
---|
502 | return 0;
|
---|
503 | }
|
---|
504 |
|
---|
505 | static int FAST_FUNC raw_do_one(char *line)
|
---|
506 | {
|
---|
507 | int have_remaddr;
|
---|
508 | struct inet_params param;
|
---|
509 |
|
---|
510 | if (scan_inet_proc_line(¶m, line))
|
---|
511 | return 1;
|
---|
512 |
|
---|
513 | have_remaddr = NOT_NULL_ADDR(param.remaddr);
|
---|
514 | print_inet_line(¶m, itoa(param.state), "raw", have_remaddr);
|
---|
515 | return 0;
|
---|
516 | }
|
---|
517 |
|
---|
518 | static int FAST_FUNC unix_do_one(char *line)
|
---|
519 | {
|
---|
520 | unsigned long refcnt, proto, unix_flags;
|
---|
521 | unsigned long inode;
|
---|
522 | int type, state;
|
---|
523 | int num, path_ofs;
|
---|
524 | const char *ss_proto, *ss_state, *ss_type;
|
---|
525 | char ss_flags[32];
|
---|
526 |
|
---|
527 | /* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..."
|
---|
528 | * Other users report long lines filled by NUL bytes.
|
---|
529 | * (those ^@ are NUL bytes too). We see them as empty lines. */
|
---|
530 | if (!line[0])
|
---|
531 | return 0;
|
---|
532 |
|
---|
533 | path_ofs = 0; /* paranoia */
|
---|
534 | num = sscanf(line, "%*p: %lX %lX %lX %X %X %lu %n",
|
---|
535 | &refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs);
|
---|
536 | if (num < 6) {
|
---|
537 | return 1; /* error */
|
---|
538 | }
|
---|
539 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
|
---|
540 | if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
|
---|
541 | if (!(flags & NETSTAT_LISTENING))
|
---|
542 | return 0;
|
---|
543 | } else {
|
---|
544 | if (!(flags & NETSTAT_CONNECTED))
|
---|
545 | return 0;
|
---|
546 | }
|
---|
547 | }
|
---|
548 |
|
---|
549 | switch (proto) {
|
---|
550 | case 0:
|
---|
551 | ss_proto = "unix";
|
---|
552 | break;
|
---|
553 | default:
|
---|
554 | ss_proto = "??";
|
---|
555 | }
|
---|
556 |
|
---|
557 | switch (type) {
|
---|
558 | case SOCK_STREAM:
|
---|
559 | ss_type = "STREAM";
|
---|
560 | break;
|
---|
561 | case SOCK_DGRAM:
|
---|
562 | ss_type = "DGRAM";
|
---|
563 | break;
|
---|
564 | case SOCK_RAW:
|
---|
565 | ss_type = "RAW";
|
---|
566 | break;
|
---|
567 | case SOCK_RDM:
|
---|
568 | ss_type = "RDM";
|
---|
569 | break;
|
---|
570 | case SOCK_SEQPACKET:
|
---|
571 | ss_type = "SEQPACKET";
|
---|
572 | break;
|
---|
573 | default:
|
---|
574 | ss_type = "UNKNOWN";
|
---|
575 | }
|
---|
576 |
|
---|
577 | switch (state) {
|
---|
578 | case SS_FREE:
|
---|
579 | ss_state = "FREE";
|
---|
580 | break;
|
---|
581 | case SS_UNCONNECTED:
|
---|
582 | /*
|
---|
583 | * Unconnected sockets may be listening
|
---|
584 | * for something.
|
---|
585 | */
|
---|
586 | if (unix_flags & SO_ACCEPTCON) {
|
---|
587 | ss_state = "LISTENING";
|
---|
588 | } else {
|
---|
589 | ss_state = "";
|
---|
590 | }
|
---|
591 | break;
|
---|
592 | case SS_CONNECTING:
|
---|
593 | ss_state = "CONNECTING";
|
---|
594 | break;
|
---|
595 | case SS_CONNECTED:
|
---|
596 | ss_state = "CONNECTED";
|
---|
597 | break;
|
---|
598 | case SS_DISCONNECTING:
|
---|
599 | ss_state = "DISCONNECTING";
|
---|
600 | break;
|
---|
601 | default:
|
---|
602 | ss_state = "UNKNOWN";
|
---|
603 | }
|
---|
604 |
|
---|
605 | strcpy(ss_flags, "[ ");
|
---|
606 | if (unix_flags & SO_ACCEPTCON)
|
---|
607 | strcat(ss_flags, "ACC ");
|
---|
608 | if (unix_flags & SO_WAITDATA)
|
---|
609 | strcat(ss_flags, "W ");
|
---|
610 | if (unix_flags & SO_NOSPACE)
|
---|
611 | strcat(ss_flags, "N ");
|
---|
612 | strcat(ss_flags, "]");
|
---|
613 |
|
---|
614 | printf("%-5s %-6ld %-11s %-10s %-13s %6lu ",
|
---|
615 | ss_proto, refcnt, ss_flags, ss_type, ss_state, inode
|
---|
616 | );
|
---|
617 |
|
---|
618 | #if ENABLE_FEATURE_NETSTAT_PRG
|
---|
619 | if (option_mask32 & OPT_prg)
|
---|
620 | printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
|
---|
621 | #endif
|
---|
622 |
|
---|
623 | /* TODO: currently we stop at first NUL byte. Is it a problem? */
|
---|
624 | line += path_ofs;
|
---|
625 | *strchrnul(line, '\n') = '\0';
|
---|
626 | while (*line)
|
---|
627 | fputc_printable(*line++, stdout);
|
---|
628 | bb_putchar('\n');
|
---|
629 | return 0;
|
---|
630 | }
|
---|
631 |
|
---|
632 | static void do_info(const char *file, int FAST_FUNC (*proc)(char *))
|
---|
633 | {
|
---|
634 | int lnr;
|
---|
635 | FILE *procinfo;
|
---|
636 | char *buffer;
|
---|
637 |
|
---|
638 | /* _stdin is just to save "r" param */
|
---|
639 | procinfo = fopen_or_warn_stdin(file);
|
---|
640 | if (procinfo == NULL) {
|
---|
641 | return;
|
---|
642 | }
|
---|
643 | lnr = 0;
|
---|
644 | /* Why xmalloc_fgets_str? because it doesn't stop on NULs */
|
---|
645 | while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) {
|
---|
646 | /* line 0 is skipped */
|
---|
647 | if (lnr && proc(buffer))
|
---|
648 | bb_error_msg("%s: bogus data on line %d", file, lnr + 1);
|
---|
649 | lnr++;
|
---|
650 | free(buffer);
|
---|
651 | }
|
---|
652 | fclose(procinfo);
|
---|
653 | }
|
---|
654 |
|
---|
655 | int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
656 | int netstat_main(int argc UNUSED_PARAM, char **argv)
|
---|
657 | {
|
---|
658 | unsigned opt;
|
---|
659 |
|
---|
660 | INIT_G();
|
---|
661 |
|
---|
662 | /* Option string must match NETSTAT_xxx constants */
|
---|
663 | opt = getopt32(argv, NETSTAT_OPTS);
|
---|
664 | if (opt & OPT_sock_listen) { // -l
|
---|
665 | flags &= ~NETSTAT_CONNECTED;
|
---|
666 | flags |= NETSTAT_LISTENING;
|
---|
667 | }
|
---|
668 | if (opt & OPT_sock_all) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a
|
---|
669 | //if (opt & OPT_extended) // -e
|
---|
670 | if (opt & OPT_noresolve) flags |= NETSTAT_NUMERIC; // -n
|
---|
671 | //if (opt & OPT_sock_tcp) // -t: NETSTAT_TCP
|
---|
672 | //if (opt & OPT_sock_udp) // -u: NETSTAT_UDP
|
---|
673 | //if (opt & OPT_sock_raw) // -w: NETSTAT_RAW
|
---|
674 | //if (opt & OPT_sock_unix) // -x: NETSTAT_UNIX
|
---|
675 | #if ENABLE_ROUTE
|
---|
676 | if (opt & OPT_route) { // -r
|
---|
677 | bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
|
---|
678 | return 0;
|
---|
679 | }
|
---|
680 | #endif
|
---|
681 | #if ENABLE_FEATURE_NETSTAT_WIDE
|
---|
682 | G.addr_width = ADDR_NORMAL_WIDTH;
|
---|
683 | if (opt & OPT_wide) { // -W
|
---|
684 | G.addr_width = ADDR_WIDE;
|
---|
685 | }
|
---|
686 | #endif
|
---|
687 | #if ENABLE_FEATURE_NETSTAT_PRG
|
---|
688 | progname_banner = "";
|
---|
689 | if (opt & OPT_prg) { // -p
|
---|
690 | progname_banner = PROGNAME_BANNER;
|
---|
691 | prg_cache_load();
|
---|
692 | }
|
---|
693 | #endif
|
---|
694 |
|
---|
695 | opt &= NETSTAT_ALLPROTO;
|
---|
696 | if (opt) {
|
---|
697 | flags &= ~NETSTAT_ALLPROTO;
|
---|
698 | flags |= opt;
|
---|
699 | }
|
---|
700 | if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) {
|
---|
701 | printf("Active Internet connections "); /* xxx */
|
---|
702 |
|
---|
703 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
|
---|
704 | printf("(servers and established)");
|
---|
705 | else if (flags & NETSTAT_LISTENING)
|
---|
706 | printf("(only servers)");
|
---|
707 | else
|
---|
708 | printf("(w/o servers)");
|
---|
709 | printf(FMT_NET_CONN_HEADER,
|
---|
710 | IF_FEATURE_NETSTAT_WIDE(G.addr_width,) "Local Address",
|
---|
711 | IF_FEATURE_NETSTAT_WIDE(G.addr_width,) "Foreign Address",
|
---|
712 | progname_banner
|
---|
713 | );
|
---|
714 | }
|
---|
715 | if (flags & NETSTAT_TCP) {
|
---|
716 | do_info("/proc/net/tcp", tcp_do_one);
|
---|
717 | #if ENABLE_FEATURE_IPV6
|
---|
718 | do_info("/proc/net/tcp6", tcp_do_one);
|
---|
719 | #endif
|
---|
720 | }
|
---|
721 | if (flags & NETSTAT_UDP) {
|
---|
722 | do_info("/proc/net/udp", udp_do_one);
|
---|
723 | #if ENABLE_FEATURE_IPV6
|
---|
724 | do_info("/proc/net/udp6", udp_do_one);
|
---|
725 | #endif
|
---|
726 | }
|
---|
727 | if (flags & NETSTAT_RAW) {
|
---|
728 | do_info("/proc/net/raw", raw_do_one);
|
---|
729 | #if ENABLE_FEATURE_IPV6
|
---|
730 | do_info("/proc/net/raw6", raw_do_one);
|
---|
731 | #endif
|
---|
732 | }
|
---|
733 | if (flags & NETSTAT_UNIX) {
|
---|
734 | printf("Active UNIX domain sockets ");
|
---|
735 | if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED))
|
---|
736 | printf("(servers and established)");
|
---|
737 | else if (flags & NETSTAT_LISTENING)
|
---|
738 | printf("(only servers)");
|
---|
739 | else
|
---|
740 | printf("(w/o servers)");
|
---|
741 | printf("\nProto RefCnt Flags Type State I-Node %sPath\n", progname_banner);
|
---|
742 | do_info("/proc/net/unix", unix_do_one);
|
---|
743 | }
|
---|
744 | prg_cache_clear();
|
---|
745 | return 0;
|
---|
746 | }
|
---|