1 | /*
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2 | * stolen from net-tools-1.59 and stripped down for busybox by
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3 | * Erik Andersen <andersen@codepoet.org>
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4 | *
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5 | * Heavily modified by Manuel Novoa III Mar 12, 2001
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6 | *
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7 | * Added print_bytes_scaled function to reduce code size.
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8 | * Added some (potentially) missing defines.
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9 | * Improved display support for -a and for a named interface.
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10 | *
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11 | * -----------------------------------------------------------
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12 | *
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13 | * ifconfig This file contains an implementation of the command
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14 | * that either displays or sets the characteristics of
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15 | * one or more of the system's networking interfaces.
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16 | *
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17 | * Version: $Id: interface.c,v 1.25 2004/08/26 21:45:21 andersen Exp $
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18 | *
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19 | * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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20 | * and others. Copyright 1993 MicroWalt Corporation
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21 | *
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22 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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23 | *
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24 | * Patched to support 'add' and 'del' keywords for INET(4) addresses
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25 | * by Mrs. Brisby <mrs.brisby@nimh.org>
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26 | *
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27 | * {1.34} - 19980630 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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28 | * - gettext instead of catgets for i18n
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29 | * 10/1998 - Andi Kleen. Use interface list primitives.
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30 | * 20001008 - Bernd Eckenfels, Patch from RH for setting mtu
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31 | * (default AF was wrong)
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32 | */
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33 |
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34 | #include "inet_common.h"
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35 | #include <stdio.h>
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36 | #include <errno.h>
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37 | #include <stdlib.h>
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38 | #include <string.h>
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39 | #include <unistd.h>
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40 | #include <fcntl.h>
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41 | #include <ctype.h>
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42 | #include <sys/ioctl.h>
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43 | #include <sys/types.h>
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44 | #include <net/if.h>
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45 | #include <net/if_arp.h>
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46 | #include "busybox.h"
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47 |
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48 | #ifdef CONFIG_FEATURE_IPV6
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49 | # define HAVE_AFINET6 1
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50 | #else
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51 | # undef HAVE_AFINET6
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52 | #endif
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53 |
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54 | #define _PATH_PROCNET_DEV "/proc/net/dev"
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55 | #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
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56 |
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57 | #if HAVE_AFINET6
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58 |
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59 | #ifndef _LINUX_IN6_H
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60 | /*
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61 | * This is in linux/include/net/ipv6.h.
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62 | */
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63 |
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64 | struct in6_ifreq {
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65 | struct in6_addr ifr6_addr;
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66 | uint32_t ifr6_prefixlen;
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67 | unsigned int ifr6_ifindex;
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68 | };
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69 |
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70 | #endif
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71 |
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72 | #endif /* HAVE_AFINET6 */
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73 |
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74 | /* Defines for glibc2.0 users. */
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75 | #ifndef SIOCSIFTXQLEN
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76 | #define SIOCSIFTXQLEN 0x8943
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77 | #define SIOCGIFTXQLEN 0x8942
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78 | #endif
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79 |
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80 | /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
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81 | #ifndef ifr_qlen
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82 | #define ifr_qlen ifr_ifru.ifru_mtu
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83 | #endif
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84 |
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85 | #ifndef HAVE_TXQUEUELEN
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86 | #define HAVE_TXQUEUELEN 1
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87 | #endif
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88 |
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89 | #ifndef IFF_DYNAMIC
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90 | #define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
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91 | #endif
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92 |
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93 | /* This structure defines protocol families and their handlers. */
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94 | struct aftype {
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95 | const char *name;
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96 | const char *title;
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97 | int af;
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98 | int alen;
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99 | char *(*print) (unsigned char *);
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100 | char *(*sprint) (struct sockaddr *, int numeric);
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101 | int (*input) (int type, char *bufp, struct sockaddr *);
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102 | void (*herror) (char *text);
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103 | int (*rprint) (int options);
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104 | int (*rinput) (int typ, int ext, char **argv);
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105 |
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106 | /* may modify src */
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107 | int (*getmask) (char *src, struct sockaddr * mask, char *name);
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108 |
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109 | int fd;
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110 | char *flag_file;
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111 | };
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112 |
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113 | /* Display an Internet socket address. */
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114 | static char *INET_sprint(struct sockaddr *sap, int numeric)
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115 | {
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116 | static char buff[128];
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117 |
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118 | if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
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119 | return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
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120 |
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121 | if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap,
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122 | numeric, 0xffffff00) != 0)
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123 | return (NULL);
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124 |
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125 | return (buff);
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126 | }
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127 |
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128 | static struct aftype inet_aftype = {
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129 | .name = "inet",
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130 | .title = "DARPA Internet",
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131 | .af = AF_INET,
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132 | .alen = 4,
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133 | .sprint = INET_sprint,
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134 | .fd = -1
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135 | };
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136 |
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137 | #if HAVE_AFINET6
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138 |
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139 | /* Display an Internet socket address. */
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140 | /* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
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141 | static char *INET6_sprint(struct sockaddr *sap, int numeric)
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142 | {
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143 | static char buff[128];
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144 |
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145 | if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
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146 | return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
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147 | if (INET6_rresolve
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148 | (buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric) != 0)
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149 | return safe_strncpy(buff, "[UNKNOWN]", sizeof(buff));
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150 | return (buff);
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151 | }
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152 |
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153 | static struct aftype inet6_aftype = {
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154 | .name = "inet6",
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155 | .title = "IPv6",
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156 | .af = AF_INET6,
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157 | .alen = sizeof(struct in6_addr),
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158 | .sprint = INET6_sprint,
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159 | .fd = -1
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160 | };
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161 |
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162 | #endif /* HAVE_AFINET6 */
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163 |
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164 | /* Display an UNSPEC address. */
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165 | static char *UNSPEC_print(unsigned char *ptr)
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166 | {
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167 | static char buff[sizeof(struct sockaddr) * 3 + 1];
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168 | char *pos;
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169 | unsigned int i;
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170 |
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171 | pos = buff;
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172 | for (i = 0; i < sizeof(struct sockaddr); i++) {
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173 | /* careful -- not every libc's sprintf returns # bytes written */
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174 | sprintf(pos, "%02X-", (*ptr++ & 0377));
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175 | pos += 3;
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176 | }
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177 | /* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
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178 | *--pos = '\0';
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179 | return (buff);
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180 | }
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181 |
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182 | /* Display an UNSPEC socket address. */
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183 | static char *UNSPEC_sprint(struct sockaddr *sap, int numeric)
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184 | {
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185 | static char buf[64];
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186 |
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187 | if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
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188 | return safe_strncpy(buf, "[NONE SET]", sizeof(buf));
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189 | return (UNSPEC_print((unsigned char *)sap->sa_data));
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190 | }
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191 |
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192 | static struct aftype unspec_aftype = {
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193 | "unspec", "UNSPEC", AF_UNSPEC, 0,
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194 | UNSPEC_print, UNSPEC_sprint, NULL, NULL,
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195 | NULL,
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196 | };
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197 |
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198 | static struct aftype * const aftypes[] = {
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199 | &inet_aftype,
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200 | #if HAVE_AFINET6
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201 | &inet6_aftype,
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202 | #endif
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203 | &unspec_aftype,
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204 | NULL
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205 | };
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206 |
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207 | /* Check our protocol family table for this family. */
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208 | static struct aftype *get_afntype(int af)
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209 | {
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210 | struct aftype * const *afp;
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211 |
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212 | afp = aftypes;
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213 | while (*afp != NULL) {
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214 | if ((*afp)->af == af)
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215 | return (*afp);
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216 | afp++;
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217 | }
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218 | return (NULL);
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219 | }
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220 |
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221 | /* Check our protocol family table for this family and return its socket */
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222 | static int get_socket_for_af(int af)
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223 | {
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224 | struct aftype * const *afp;
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225 |
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226 | afp = aftypes;
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227 | while (*afp != NULL) {
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228 | if ((*afp)->af == af)
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229 | return (*afp)->fd;
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230 | afp++;
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231 | }
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232 | return -1;
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233 | }
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234 |
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235 | struct user_net_device_stats {
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236 | unsigned long long rx_packets; /* total packets received */
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237 | unsigned long long tx_packets; /* total packets transmitted */
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238 | unsigned long long rx_bytes; /* total bytes received */
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239 | unsigned long long tx_bytes; /* total bytes transmitted */
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240 | unsigned long rx_errors; /* bad packets received */
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241 | unsigned long tx_errors; /* packet transmit problems */
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242 | unsigned long rx_dropped; /* no space in linux buffers */
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243 | unsigned long tx_dropped; /* no space available in linux */
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244 | unsigned long rx_multicast; /* multicast packets received */
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245 | unsigned long rx_compressed;
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246 | unsigned long tx_compressed;
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247 | unsigned long collisions;
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248 |
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249 | /* detailed rx_errors: */
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250 | unsigned long rx_length_errors;
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251 | unsigned long rx_over_errors; /* receiver ring buff overflow */
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252 | unsigned long rx_crc_errors; /* recved pkt with crc error */
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253 | unsigned long rx_frame_errors; /* recv'd frame alignment error */
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254 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */
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255 | unsigned long rx_missed_errors; /* receiver missed packet */
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256 | /* detailed tx_errors */
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257 | unsigned long tx_aborted_errors;
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258 | unsigned long tx_carrier_errors;
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259 | unsigned long tx_fifo_errors;
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260 | unsigned long tx_heartbeat_errors;
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261 | unsigned long tx_window_errors;
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262 | };
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263 |
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264 | struct interface {
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265 | struct interface *next, *prev;
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266 | char name[IFNAMSIZ]; /* interface name */
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267 | short type; /* if type */
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268 | short flags; /* various flags */
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269 | int metric; /* routing metric */
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270 | int mtu; /* MTU value */
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271 | int tx_queue_len; /* transmit queue length */
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272 | struct ifmap map; /* hardware setup */
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273 | struct sockaddr addr; /* IP address */
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274 | struct sockaddr dstaddr; /* P-P IP address */
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275 | struct sockaddr broadaddr; /* IP broadcast address */
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276 | struct sockaddr netmask; /* IP network mask */
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277 | int has_ip;
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278 | char hwaddr[32]; /* HW address */
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279 | int statistics_valid;
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280 | struct user_net_device_stats stats; /* statistics */
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281 | int keepalive; /* keepalive value for SLIP */
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282 | int outfill; /* outfill value for SLIP */
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283 | };
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284 |
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285 |
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286 | int interface_opt_a = 0; /* show all interfaces */
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287 |
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288 | static struct interface *int_list, *int_last;
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289 | static int skfd = -1; /* generic raw socket desc. */
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290 |
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291 |
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292 | static int sockets_open(int family)
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293 | {
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294 | struct aftype * const *aft;
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295 | int sfd = -1;
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296 | static int force = -1;
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297 |
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298 | if (force < 0) {
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299 | force = 0;
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300 | if (get_linux_version_code() < KERNEL_VERSION(2,1,0))
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301 | force = 1;
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302 | if (access("/proc/net", R_OK))
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303 | force = 1;
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304 | }
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305 | for (aft = aftypes; *aft; aft++) {
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306 | struct aftype *af = *aft;
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307 | int type = SOCK_DGRAM;
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308 |
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309 | if (af->af == AF_UNSPEC)
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310 | continue;
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311 | if (family && family != af->af)
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312 | continue;
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313 | if (af->fd != -1) {
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314 | sfd = af->fd;
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315 | continue;
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316 | }
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317 | /* Check some /proc file first to not stress kmod */
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318 | if (!family && !force && af->flag_file) {
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319 | if (access(af->flag_file, R_OK))
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320 | continue;
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321 | }
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322 | af->fd = socket(af->af, type, 0);
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323 | if (af->fd >= 0)
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324 | sfd = af->fd;
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325 | }
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326 | if (sfd < 0) {
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327 | bb_error_msg("No usable address families found.");
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328 | }
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329 | return sfd;
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330 | }
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331 |
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332 | #ifdef CONFIG_FEATURE_CLEAN_UP
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333 | static void sockets_close(void)
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334 | {
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335 | struct aftype * const *aft;
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336 | for (aft = aftypes; *aft != NULL; aft++) {
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337 | struct aftype *af = *aft;
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338 | if( af->fd != -1 ) {
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339 | close(af->fd);
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340 | af->fd = -1;
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341 | }
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342 | }
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343 | }
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344 | #endif
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345 |
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346 | /* like strcmp(), but knows about numbers */
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347 | static int nstrcmp(const char *a, const char *b)
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348 | {
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349 | const char *a_ptr = a;
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350 | const char *b_ptr = b;
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351 |
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352 | while (*a == *b) {
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353 | if (*a == '\0') {
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354 | return 0;
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355 | }
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356 | if (!isdigit(*a) && isdigit(*(a+1))) {
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357 | a_ptr = a+1;
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358 | b_ptr = b+1;
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359 | }
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360 | a++;
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361 | b++;
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362 | }
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363 |
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364 | if (isdigit(*a) && isdigit(*b)) {
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365 | return atoi(a_ptr) > atoi(b_ptr) ? 1 : -1;
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366 | }
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367 | return *a - *b;
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368 | }
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369 |
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370 | static struct interface *add_interface(char *name)
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371 | {
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372 | struct interface *ife, **nextp, *new;
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373 |
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374 | for (ife = int_last; ife; ife = ife->prev) {
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375 | int n = nstrcmp(ife->name, name);
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376 |
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377 | if (n == 0)
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378 | return ife;
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379 | if (n < 0)
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380 | break;
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381 | }
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382 |
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383 | new = xzalloc(sizeof(*new));
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384 | safe_strncpy(new->name, name, IFNAMSIZ);
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385 | nextp = ife ? &ife->next : &int_list;
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386 | new->prev = ife;
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387 | new->next = *nextp;
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388 | if (new->next)
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389 | new->next->prev = new;
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390 | else
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391 | int_last = new;
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392 | *nextp = new;
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393 | return new;
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394 | }
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395 |
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396 |
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397 | static int if_readconf(void)
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398 | {
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399 | int numreqs = 30;
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400 | struct ifconf ifc;
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401 | struct ifreq *ifr;
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402 | int n, err = -1;
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403 | int skfd2;
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404 |
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405 | /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
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406 | (as of 2.1.128) */
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407 | skfd2 = get_socket_for_af(AF_INET);
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408 | if (skfd2 < 0) {
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409 | bb_perror_msg(("warning: no inet socket available"));
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410 | /* Try to soldier on with whatever socket we can get hold of. */
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411 | skfd2 = sockets_open(0);
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412 | if (skfd2 < 0)
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413 | return -1;
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414 | }
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415 |
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416 | ifc.ifc_buf = NULL;
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417 | for (;;) {
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418 | ifc.ifc_len = sizeof(struct ifreq) * numreqs;
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419 | ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
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420 |
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421 | if (ioctl(skfd2, SIOCGIFCONF, &ifc) < 0) {
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422 | perror("SIOCGIFCONF");
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423 | goto out;
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424 | }
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425 | if (ifc.ifc_len == sizeof(struct ifreq) * numreqs) {
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426 | /* assume it overflowed and try again */
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427 | numreqs += 10;
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428 | continue;
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429 | }
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430 | break;
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431 | }
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432 |
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433 | ifr = ifc.ifc_req;
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434 | for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
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435 | add_interface(ifr->ifr_name);
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436 | ifr++;
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437 | }
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438 | err = 0;
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439 |
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440 | out:
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441 | free(ifc.ifc_buf);
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442 | return err;
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443 | }
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444 |
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445 | static char *get_name(char *name, char *p)
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446 | {
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447 | /* Extract <name> from nul-terminated p where p matches
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448 | <name>: after leading whitespace.
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449 | If match is not made, set name empty and return unchanged p */
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450 | int namestart=0, nameend=0;
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451 | while (isspace(p[namestart]))
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452 | namestart++;
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453 | nameend=namestart;
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454 | while (p[nameend] && p[nameend]!=':' && !isspace(p[nameend]))
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455 | nameend++;
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456 | if (p[nameend]==':') {
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457 | if ((nameend-namestart)<IFNAMSIZ) {
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458 | memcpy(name,&p[namestart],nameend-namestart);
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459 | name[nameend-namestart]='\0';
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460 | p=&p[nameend];
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461 | } else {
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462 | /* Interface name too large */
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463 | name[0]='\0';
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464 | }
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465 | } else {
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466 | /* trailing ':' not found - return empty */
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467 | name[0]='\0';
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468 | }
|
---|
469 | return p + 1;
|
---|
470 | }
|
---|
471 |
|
---|
472 | /* If scanf supports size qualifiers for %n conversions, then we can
|
---|
473 | * use a modified fmt that simply stores the position in the fields
|
---|
474 | * having no associated fields in the proc string. Of course, we need
|
---|
475 | * to zero them again when we're done. But that is smaller than the
|
---|
476 | * old approach of multiple scanf occurrences with large numbers of
|
---|
477 | * args. */
|
---|
478 |
|
---|
479 | /* static const char * const ss_fmt[] = { */
|
---|
480 | /* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
|
---|
481 | /* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
|
---|
482 | /* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
|
---|
483 | /* }; */
|
---|
484 |
|
---|
485 | /* Lie about the size of the int pointed to for %n. */
|
---|
486 | #if INT_MAX == LONG_MAX
|
---|
487 | static const char * const ss_fmt[] = {
|
---|
488 | "%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
|
---|
489 | "%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
|
---|
490 | "%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
|
---|
491 | };
|
---|
492 | #else
|
---|
493 | static const char * const ss_fmt[] = {
|
---|
494 | "%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
|
---|
495 | "%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
|
---|
496 | "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
|
---|
497 | };
|
---|
498 |
|
---|
499 | #endif
|
---|
500 |
|
---|
501 | static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
|
---|
502 | {
|
---|
503 | memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
|
---|
504 |
|
---|
505 | sscanf(bp, ss_fmt[procnetdev_vsn],
|
---|
506 | &ife->stats.rx_bytes, /* missing for 0 */
|
---|
507 | &ife->stats.rx_packets,
|
---|
508 | &ife->stats.rx_errors,
|
---|
509 | &ife->stats.rx_dropped,
|
---|
510 | &ife->stats.rx_fifo_errors,
|
---|
511 | &ife->stats.rx_frame_errors,
|
---|
512 | &ife->stats.rx_compressed, /* missing for <= 1 */
|
---|
513 | &ife->stats.rx_multicast, /* missing for <= 1 */
|
---|
514 | &ife->stats.tx_bytes, /* missing for 0 */
|
---|
515 | &ife->stats.tx_packets,
|
---|
516 | &ife->stats.tx_errors,
|
---|
517 | &ife->stats.tx_dropped,
|
---|
518 | &ife->stats.tx_fifo_errors,
|
---|
519 | &ife->stats.collisions,
|
---|
520 | &ife->stats.tx_carrier_errors,
|
---|
521 | &ife->stats.tx_compressed /* missing for <= 1 */
|
---|
522 | );
|
---|
523 |
|
---|
524 | if (procnetdev_vsn <= 1) {
|
---|
525 | if (procnetdev_vsn == 0) {
|
---|
526 | ife->stats.rx_bytes = 0;
|
---|
527 | ife->stats.tx_bytes = 0;
|
---|
528 | }
|
---|
529 | ife->stats.rx_multicast = 0;
|
---|
530 | ife->stats.rx_compressed = 0;
|
---|
531 | ife->stats.tx_compressed = 0;
|
---|
532 | }
|
---|
533 | }
|
---|
534 |
|
---|
535 | static inline int procnetdev_version(char *buf)
|
---|
536 | {
|
---|
537 | if (strstr(buf, "compressed"))
|
---|
538 | return 2;
|
---|
539 | if (strstr(buf, "bytes"))
|
---|
540 | return 1;
|
---|
541 | return 0;
|
---|
542 | }
|
---|
543 |
|
---|
544 | static int if_readlist_proc(char *target)
|
---|
545 | {
|
---|
546 | static int proc_read;
|
---|
547 | FILE *fh;
|
---|
548 | char buf[512];
|
---|
549 | struct interface *ife;
|
---|
550 | int err, procnetdev_vsn;
|
---|
551 |
|
---|
552 | if (proc_read)
|
---|
553 | return 0;
|
---|
554 | if (!target)
|
---|
555 | proc_read = 1;
|
---|
556 |
|
---|
557 | fh = fopen(_PATH_PROCNET_DEV, "r");
|
---|
558 | if (!fh) {
|
---|
559 | bb_perror_msg("Warning: cannot open %s. Limited output.", _PATH_PROCNET_DEV);
|
---|
560 | return if_readconf();
|
---|
561 | }
|
---|
562 | fgets(buf, sizeof buf, fh); /* eat line */
|
---|
563 | fgets(buf, sizeof buf, fh);
|
---|
564 |
|
---|
565 | procnetdev_vsn = procnetdev_version(buf);
|
---|
566 |
|
---|
567 | err = 0;
|
---|
568 | while (fgets(buf, sizeof buf, fh)) {
|
---|
569 | char *s, name[128];
|
---|
570 |
|
---|
571 | s = get_name(name, buf);
|
---|
572 | ife = add_interface(name);
|
---|
573 | get_dev_fields(s, ife, procnetdev_vsn);
|
---|
574 | ife->statistics_valid = 1;
|
---|
575 | if (target && !strcmp(target, name))
|
---|
576 | break;
|
---|
577 | }
|
---|
578 | if (ferror(fh)) {
|
---|
579 | perror(_PATH_PROCNET_DEV);
|
---|
580 | err = -1;
|
---|
581 | proc_read = 0;
|
---|
582 | }
|
---|
583 | fclose(fh);
|
---|
584 | return err;
|
---|
585 | }
|
---|
586 |
|
---|
587 | static int if_readlist(void)
|
---|
588 | {
|
---|
589 | int err = if_readlist_proc(NULL);
|
---|
590 |
|
---|
591 | if (!err)
|
---|
592 | err = if_readconf();
|
---|
593 | return err;
|
---|
594 | }
|
---|
595 |
|
---|
596 | static int for_all_interfaces(int (*doit) (struct interface *, void *),
|
---|
597 | void *cookie)
|
---|
598 | {
|
---|
599 | struct interface *ife;
|
---|
600 |
|
---|
601 | if (!int_list && (if_readlist() < 0))
|
---|
602 | return -1;
|
---|
603 | for (ife = int_list; ife; ife = ife->next) {
|
---|
604 | int err = doit(ife, cookie);
|
---|
605 |
|
---|
606 | if (err)
|
---|
607 | return err;
|
---|
608 | }
|
---|
609 | return 0;
|
---|
610 | }
|
---|
611 |
|
---|
612 | /* Fetch the interface configuration from the kernel. */
|
---|
613 | static int if_fetch(struct interface *ife)
|
---|
614 | {
|
---|
615 | struct ifreq ifr;
|
---|
616 | int fd;
|
---|
617 | char *ifname = ife->name;
|
---|
618 |
|
---|
619 | strcpy(ifr.ifr_name, ifname);
|
---|
620 | if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
|
---|
621 | return (-1);
|
---|
622 | ife->flags = ifr.ifr_flags;
|
---|
623 |
|
---|
624 | strcpy(ifr.ifr_name, ifname);
|
---|
625 | if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
|
---|
626 | memset(ife->hwaddr, 0, 32);
|
---|
627 | else
|
---|
628 | memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
|
---|
629 |
|
---|
630 | ife->type = ifr.ifr_hwaddr.sa_family;
|
---|
631 |
|
---|
632 | strcpy(ifr.ifr_name, ifname);
|
---|
633 | if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0)
|
---|
634 | ife->metric = 0;
|
---|
635 | else
|
---|
636 | ife->metric = ifr.ifr_metric;
|
---|
637 |
|
---|
638 | strcpy(ifr.ifr_name, ifname);
|
---|
639 | if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
|
---|
640 | ife->mtu = 0;
|
---|
641 | else
|
---|
642 | ife->mtu = ifr.ifr_mtu;
|
---|
643 |
|
---|
644 | #ifdef SIOCGIFMAP
|
---|
645 | strcpy(ifr.ifr_name, ifname);
|
---|
646 | if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
|
---|
647 | ife->map = ifr.ifr_map;
|
---|
648 | else
|
---|
649 | #endif
|
---|
650 | memset(&ife->map, 0, sizeof(struct ifmap));
|
---|
651 |
|
---|
652 | #ifdef HAVE_TXQUEUELEN
|
---|
653 | strcpy(ifr.ifr_name, ifname);
|
---|
654 | if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) < 0)
|
---|
655 | ife->tx_queue_len = -1; /* unknown value */
|
---|
656 | else
|
---|
657 | ife->tx_queue_len = ifr.ifr_qlen;
|
---|
658 | #else
|
---|
659 | ife->tx_queue_len = -1; /* unknown value */
|
---|
660 | #endif
|
---|
661 |
|
---|
662 | /* IPv4 address? */
|
---|
663 | fd = get_socket_for_af(AF_INET);
|
---|
664 | if (fd >= 0) {
|
---|
665 | strcpy(ifr.ifr_name, ifname);
|
---|
666 | ifr.ifr_addr.sa_family = AF_INET;
|
---|
667 | if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
|
---|
668 | ife->has_ip = 1;
|
---|
669 | ife->addr = ifr.ifr_addr;
|
---|
670 | strcpy(ifr.ifr_name, ifname);
|
---|
671 | if (ioctl(fd, SIOCGIFDSTADDR, &ifr) < 0)
|
---|
672 | memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
|
---|
673 | else
|
---|
674 | ife->dstaddr = ifr.ifr_dstaddr;
|
---|
675 |
|
---|
676 | strcpy(ifr.ifr_name, ifname);
|
---|
677 | if (ioctl(fd, SIOCGIFBRDADDR, &ifr) < 0)
|
---|
678 | memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
|
---|
679 | else
|
---|
680 | ife->broadaddr = ifr.ifr_broadaddr;
|
---|
681 |
|
---|
682 | strcpy(ifr.ifr_name, ifname);
|
---|
683 | if (ioctl(fd, SIOCGIFNETMASK, &ifr) < 0)
|
---|
684 | memset(&ife->netmask, 0, sizeof(struct sockaddr));
|
---|
685 | else
|
---|
686 | ife->netmask = ifr.ifr_netmask;
|
---|
687 | } else
|
---|
688 | memset(&ife->addr, 0, sizeof(struct sockaddr));
|
---|
689 | }
|
---|
690 |
|
---|
691 | return 0;
|
---|
692 | }
|
---|
693 |
|
---|
694 |
|
---|
695 | static int do_if_fetch(struct interface *ife)
|
---|
696 | {
|
---|
697 | if (if_fetch(ife) < 0) {
|
---|
698 | char *errmsg;
|
---|
699 |
|
---|
700 | if (errno == ENODEV) {
|
---|
701 | /* Give better error message for this case. */
|
---|
702 | errmsg = "Device not found";
|
---|
703 | } else {
|
---|
704 | errmsg = strerror(errno);
|
---|
705 | }
|
---|
706 | bb_error_msg("%s: error fetching interface information: %s",
|
---|
707 | ife->name, errmsg);
|
---|
708 | return -1;
|
---|
709 | }
|
---|
710 | return 0;
|
---|
711 | }
|
---|
712 |
|
---|
713 | /* This structure defines hardware protocols and their handlers. */
|
---|
714 | struct hwtype {
|
---|
715 | const char * const name;
|
---|
716 | const char *title;
|
---|
717 | int type;
|
---|
718 | int alen;
|
---|
719 | char *(*print) (unsigned char *);
|
---|
720 | int (*input) (char *, struct sockaddr *);
|
---|
721 | int (*activate) (int fd);
|
---|
722 | int suppress_null_addr;
|
---|
723 | };
|
---|
724 |
|
---|
725 | static const struct hwtype unspec_hwtype = {
|
---|
726 | .name = "unspec",
|
---|
727 | .title = "UNSPEC",
|
---|
728 | .type = -1,
|
---|
729 | .print = UNSPEC_print
|
---|
730 | };
|
---|
731 |
|
---|
732 | static const struct hwtype loop_hwtype = {
|
---|
733 | .name = "loop",
|
---|
734 | .title = "Local Loopback",
|
---|
735 | .type = ARPHRD_LOOPBACK
|
---|
736 | };
|
---|
737 |
|
---|
738 | #include <net/if_arp.h>
|
---|
739 |
|
---|
740 | #if (__GLIBC__ >=2 && __GLIBC_MINOR >= 1) || defined(_NEWLIB_VERSION)
|
---|
741 | #include <net/ethernet.h>
|
---|
742 | #else
|
---|
743 | #include <linux/if_ether.h>
|
---|
744 | #endif
|
---|
745 |
|
---|
746 | /* Display an Ethernet address in readable format. */
|
---|
747 | static char *pr_ether(unsigned char *ptr)
|
---|
748 | {
|
---|
749 | static char buff[64];
|
---|
750 |
|
---|
751 | snprintf(buff, sizeof(buff), "%02X:%02X:%02X:%02X:%02X:%02X",
|
---|
752 | (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
|
---|
753 | (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
|
---|
754 | );
|
---|
755 | return (buff);
|
---|
756 | }
|
---|
757 |
|
---|
758 | static const struct hwtype ether_hwtype = {
|
---|
759 | .name = "ether",
|
---|
760 | .title = "Ethernet",
|
---|
761 | .type = ARPHRD_ETHER,
|
---|
762 | .alen = ETH_ALEN,
|
---|
763 | .print = pr_ether
|
---|
764 | };
|
---|
765 |
|
---|
766 | #include <net/if_arp.h>
|
---|
767 |
|
---|
768 | static const struct hwtype ppp_hwtype = {
|
---|
769 | .name = "ppp",
|
---|
770 | .title = "Point-to-Point Protocol",
|
---|
771 | .type = ARPHRD_PPP
|
---|
772 | };
|
---|
773 |
|
---|
774 | #ifdef CONFIG_FEATURE_IPV6
|
---|
775 | static const struct hwtype sit_hwtype = {
|
---|
776 | .name = "sit",
|
---|
777 | .title = "IPv6-in-IPv4",
|
---|
778 | .type = ARPHRD_SIT,
|
---|
779 | .print = UNSPEC_print,
|
---|
780 | .suppress_null_addr = 1
|
---|
781 | } ;
|
---|
782 | #endif
|
---|
783 |
|
---|
784 | static const struct hwtype * const hwtypes[] = {
|
---|
785 | &loop_hwtype,
|
---|
786 | ðer_hwtype,
|
---|
787 | &ppp_hwtype,
|
---|
788 | &unspec_hwtype,
|
---|
789 | #ifdef CONFIG_FEATURE_IPV6
|
---|
790 | &sit_hwtype,
|
---|
791 | #endif
|
---|
792 | NULL
|
---|
793 | };
|
---|
794 |
|
---|
795 | #ifdef IFF_PORTSEL
|
---|
796 | static const char * const if_port_text[] = {
|
---|
797 | /* Keep in step with <linux/netdevice.h> */
|
---|
798 | "unknown",
|
---|
799 | "10base2",
|
---|
800 | "10baseT",
|
---|
801 | "AUI",
|
---|
802 | "100baseT",
|
---|
803 | "100baseTX",
|
---|
804 | "100baseFX",
|
---|
805 | NULL
|
---|
806 | };
|
---|
807 | #endif
|
---|
808 |
|
---|
809 | /* Check our hardware type table for this type. */
|
---|
810 | static const struct hwtype *get_hwntype(int type)
|
---|
811 | {
|
---|
812 | const struct hwtype * const *hwp;
|
---|
813 |
|
---|
814 | hwp = hwtypes;
|
---|
815 | while (*hwp != NULL) {
|
---|
816 | if ((*hwp)->type == type)
|
---|
817 | return (*hwp);
|
---|
818 | hwp++;
|
---|
819 | }
|
---|
820 | return (NULL);
|
---|
821 | }
|
---|
822 |
|
---|
823 | /* return 1 if address is all zeros */
|
---|
824 | static int hw_null_address(const struct hwtype *hw, void *ap)
|
---|
825 | {
|
---|
826 | unsigned int i;
|
---|
827 | unsigned char *address = (unsigned char *) ap;
|
---|
828 |
|
---|
829 | for (i = 0; i < hw->alen; i++)
|
---|
830 | if (address[i])
|
---|
831 | return 0;
|
---|
832 | return 1;
|
---|
833 | }
|
---|
834 |
|
---|
835 | static const char TRext[] = "\0\0\0Ki\0Mi\0Gi\0Ti";
|
---|
836 |
|
---|
837 | static void print_bytes_scaled(unsigned long long ull, const char *end)
|
---|
838 | {
|
---|
839 | unsigned long long int_part;
|
---|
840 | const char *ext;
|
---|
841 | unsigned int frac_part;
|
---|
842 | int i;
|
---|
843 |
|
---|
844 | frac_part = 0;
|
---|
845 | ext = TRext;
|
---|
846 | int_part = ull;
|
---|
847 | i = 4;
|
---|
848 | do {
|
---|
849 | if (int_part >= 1024) {
|
---|
850 | frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
|
---|
851 | int_part /= 1024;
|
---|
852 | ext += 3; /* KiB, MiB, GiB, TiB */
|
---|
853 | }
|
---|
854 | --i;
|
---|
855 | } while (i);
|
---|
856 |
|
---|
857 | printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
|
---|
858 | }
|
---|
859 |
|
---|
860 | static const char * const ife_print_flags_strs[] = {
|
---|
861 | "UP ",
|
---|
862 | "BROADCAST ",
|
---|
863 | "DEBUG ",
|
---|
864 | "LOOPBACK ",
|
---|
865 | "POINTOPOINT ",
|
---|
866 | "NOTRAILERS ",
|
---|
867 | "RUNNING ",
|
---|
868 | "NOARP ",
|
---|
869 | "PROMISC ",
|
---|
870 | "ALLMULTI ",
|
---|
871 | "SLAVE ",
|
---|
872 | "MASTER ",
|
---|
873 | "MULTICAST ",
|
---|
874 | #ifdef HAVE_DYNAMIC
|
---|
875 | "DYNAMIC "
|
---|
876 | #endif
|
---|
877 | };
|
---|
878 |
|
---|
879 | static const unsigned short ife_print_flags_mask[] = {
|
---|
880 | IFF_UP,
|
---|
881 | IFF_BROADCAST,
|
---|
882 | IFF_DEBUG,
|
---|
883 | IFF_LOOPBACK,
|
---|
884 | IFF_POINTOPOINT,
|
---|
885 | IFF_NOTRAILERS,
|
---|
886 | IFF_RUNNING,
|
---|
887 | IFF_NOARP,
|
---|
888 | IFF_PROMISC,
|
---|
889 | IFF_ALLMULTI,
|
---|
890 | IFF_SLAVE,
|
---|
891 | IFF_MASTER,
|
---|
892 | IFF_MULTICAST,
|
---|
893 | #ifdef HAVE_DYNAMIC
|
---|
894 | IFF_DYNAMIC
|
---|
895 | #endif
|
---|
896 | 0
|
---|
897 | };
|
---|
898 |
|
---|
899 | static void ife_print(struct interface *ptr)
|
---|
900 | {
|
---|
901 | struct aftype *ap;
|
---|
902 | const struct hwtype *hw;
|
---|
903 | int hf;
|
---|
904 | int can_compress = 0;
|
---|
905 |
|
---|
906 | #if HAVE_AFINET6
|
---|
907 | FILE *f;
|
---|
908 | char addr6[40], devname[20];
|
---|
909 | struct sockaddr_in6 sap;
|
---|
910 | int plen, scope, dad_status, if_idx;
|
---|
911 | char addr6p[8][5];
|
---|
912 | #endif
|
---|
913 |
|
---|
914 | ap = get_afntype(ptr->addr.sa_family);
|
---|
915 | if (ap == NULL)
|
---|
916 | ap = get_afntype(0);
|
---|
917 |
|
---|
918 | hf = ptr->type;
|
---|
919 |
|
---|
920 | if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
|
---|
921 | can_compress = 1;
|
---|
922 |
|
---|
923 | hw = get_hwntype(hf);
|
---|
924 | if (hw == NULL)
|
---|
925 | hw = get_hwntype(-1);
|
---|
926 |
|
---|
927 | printf("%-9.9s Link encap:%s ", ptr->name, hw->title);
|
---|
928 | /* For some hardware types (eg Ash, ATM) we don't print the
|
---|
929 | hardware address if it's null. */
|
---|
930 | if (hw->print != NULL && (!(hw_null_address(hw, ptr->hwaddr) &&
|
---|
931 | hw->suppress_null_addr)))
|
---|
932 | printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
|
---|
933 | #ifdef IFF_PORTSEL
|
---|
934 | if (ptr->flags & IFF_PORTSEL) {
|
---|
935 | printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
|
---|
936 | if (ptr->flags & IFF_AUTOMEDIA)
|
---|
937 | printf("(auto)");
|
---|
938 | }
|
---|
939 | #endif
|
---|
940 | printf("\n");
|
---|
941 |
|
---|
942 | if (ptr->has_ip) {
|
---|
943 | printf(" %s addr:%s ", ap->name,
|
---|
944 | ap->sprint(&ptr->addr, 1));
|
---|
945 | if (ptr->flags & IFF_POINTOPOINT) {
|
---|
946 | printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
|
---|
947 | }
|
---|
948 | if (ptr->flags & IFF_BROADCAST) {
|
---|
949 | printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
|
---|
950 | }
|
---|
951 | printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
|
---|
952 | }
|
---|
953 |
|
---|
954 | #if HAVE_AFINET6
|
---|
955 |
|
---|
956 | #define IPV6_ADDR_ANY 0x0000U
|
---|
957 |
|
---|
958 | #define IPV6_ADDR_UNICAST 0x0001U
|
---|
959 | #define IPV6_ADDR_MULTICAST 0x0002U
|
---|
960 | #define IPV6_ADDR_ANYCAST 0x0004U
|
---|
961 |
|
---|
962 | #define IPV6_ADDR_LOOPBACK 0x0010U
|
---|
963 | #define IPV6_ADDR_LINKLOCAL 0x0020U
|
---|
964 | #define IPV6_ADDR_SITELOCAL 0x0040U
|
---|
965 |
|
---|
966 | #define IPV6_ADDR_COMPATv4 0x0080U
|
---|
967 |
|
---|
968 | #define IPV6_ADDR_SCOPE_MASK 0x00f0U
|
---|
969 |
|
---|
970 | #define IPV6_ADDR_MAPPED 0x1000U
|
---|
971 | #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
|
---|
972 |
|
---|
973 | if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
|
---|
974 | while (fscanf
|
---|
975 | (f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n",
|
---|
976 | addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
|
---|
977 | addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
|
---|
978 | &dad_status, devname) != EOF) {
|
---|
979 | if (!strcmp(devname, ptr->name)) {
|
---|
980 | sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
|
---|
981 | addr6p[0], addr6p[1], addr6p[2], addr6p[3],
|
---|
982 | addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
|
---|
983 | inet_pton(AF_INET6, addr6,
|
---|
984 | (struct sockaddr *) &sap.sin6_addr);
|
---|
985 | sap.sin6_family = AF_INET6;
|
---|
986 | printf(" inet6 addr: %s/%d",
|
---|
987 | inet6_aftype.sprint((struct sockaddr *) &sap, 1),
|
---|
988 | plen);
|
---|
989 | printf(" Scope:");
|
---|
990 | switch (scope & IPV6_ADDR_SCOPE_MASK) {
|
---|
991 | case 0:
|
---|
992 | printf("Global");
|
---|
993 | break;
|
---|
994 | case IPV6_ADDR_LINKLOCAL:
|
---|
995 | printf("Link");
|
---|
996 | break;
|
---|
997 | case IPV6_ADDR_SITELOCAL:
|
---|
998 | printf("Site");
|
---|
999 | break;
|
---|
1000 | case IPV6_ADDR_COMPATv4:
|
---|
1001 | printf("Compat");
|
---|
1002 | break;
|
---|
1003 | case IPV6_ADDR_LOOPBACK:
|
---|
1004 | printf("Host");
|
---|
1005 | break;
|
---|
1006 | default:
|
---|
1007 | printf("Unknown");
|
---|
1008 | }
|
---|
1009 | printf("\n");
|
---|
1010 | }
|
---|
1011 | }
|
---|
1012 | fclose(f);
|
---|
1013 | }
|
---|
1014 | #endif
|
---|
1015 |
|
---|
1016 | printf(" ");
|
---|
1017 | /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
|
---|
1018 |
|
---|
1019 | if (ptr->flags == 0) {
|
---|
1020 | printf("[NO FLAGS] ");
|
---|
1021 | } else {
|
---|
1022 | int i = 0;
|
---|
1023 | do {
|
---|
1024 | if (ptr->flags & ife_print_flags_mask[i]) {
|
---|
1025 | printf(ife_print_flags_strs[i]);
|
---|
1026 | }
|
---|
1027 | } while (ife_print_flags_mask[++i]);
|
---|
1028 | }
|
---|
1029 |
|
---|
1030 | /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
|
---|
1031 | printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
|
---|
1032 | #ifdef SIOCSKEEPALIVE
|
---|
1033 | if (ptr->outfill || ptr->keepalive)
|
---|
1034 | printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
|
---|
1035 | #endif
|
---|
1036 | printf("\n");
|
---|
1037 |
|
---|
1038 | /* If needed, display the interface statistics. */
|
---|
1039 |
|
---|
1040 | if (ptr->statistics_valid) {
|
---|
1041 | /* XXX: statistics are currently only printed for the primary address,
|
---|
1042 | * not for the aliases, although strictly speaking they're shared
|
---|
1043 | * by all addresses.
|
---|
1044 | */
|
---|
1045 | printf(" ");
|
---|
1046 |
|
---|
1047 | printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
|
---|
1048 | ptr->stats.rx_packets, ptr->stats.rx_errors,
|
---|
1049 | ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
|
---|
1050 | ptr->stats.rx_frame_errors);
|
---|
1051 | if (can_compress)
|
---|
1052 | printf(" compressed:%lu\n",
|
---|
1053 | ptr->stats.rx_compressed);
|
---|
1054 | printf(" ");
|
---|
1055 | printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
|
---|
1056 | ptr->stats.tx_packets, ptr->stats.tx_errors,
|
---|
1057 | ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
|
---|
1058 | ptr->stats.tx_carrier_errors);
|
---|
1059 | printf(" collisions:%lu ", ptr->stats.collisions);
|
---|
1060 | if (can_compress)
|
---|
1061 | printf("compressed:%lu ", ptr->stats.tx_compressed);
|
---|
1062 | if (ptr->tx_queue_len != -1)
|
---|
1063 | printf("txqueuelen:%d ", ptr->tx_queue_len);
|
---|
1064 | printf("\n R");
|
---|
1065 | print_bytes_scaled(ptr->stats.rx_bytes, " T");
|
---|
1066 | print_bytes_scaled(ptr->stats.tx_bytes, "\n");
|
---|
1067 |
|
---|
1068 | }
|
---|
1069 |
|
---|
1070 | if ((ptr->map.irq || ptr->map.mem_start || ptr->map.dma ||
|
---|
1071 | ptr->map.base_addr)) {
|
---|
1072 | printf(" ");
|
---|
1073 | if (ptr->map.irq)
|
---|
1074 | printf("Interrupt:%d ", ptr->map.irq);
|
---|
1075 | if (ptr->map.base_addr >= 0x100) /* Only print devices using it for
|
---|
1076 | I/O maps */
|
---|
1077 | printf("Base address:0x%lx ",
|
---|
1078 | (unsigned long) ptr->map.base_addr);
|
---|
1079 | if (ptr->map.mem_start) {
|
---|
1080 | printf("Memory:%lx-%lx ", ptr->map.mem_start,
|
---|
1081 | ptr->map.mem_end);
|
---|
1082 | }
|
---|
1083 | if (ptr->map.dma)
|
---|
1084 | printf("DMA chan:%x ", ptr->map.dma);
|
---|
1085 | printf("\n");
|
---|
1086 | }
|
---|
1087 | printf("\n");
|
---|
1088 | }
|
---|
1089 |
|
---|
1090 |
|
---|
1091 | static int do_if_print(struct interface *ife, void *cookie)
|
---|
1092 | {
|
---|
1093 | int *opt_a = (int *) cookie;
|
---|
1094 | int res;
|
---|
1095 |
|
---|
1096 | res = do_if_fetch(ife);
|
---|
1097 | if (res >= 0) {
|
---|
1098 | if ((ife->flags & IFF_UP) || *opt_a)
|
---|
1099 | ife_print(ife);
|
---|
1100 | }
|
---|
1101 | return res;
|
---|
1102 | }
|
---|
1103 |
|
---|
1104 | static struct interface *lookup_interface(char *name)
|
---|
1105 | {
|
---|
1106 | struct interface *ife = NULL;
|
---|
1107 |
|
---|
1108 | if (if_readlist_proc(name) < 0)
|
---|
1109 | return NULL;
|
---|
1110 | ife = add_interface(name);
|
---|
1111 | return ife;
|
---|
1112 | }
|
---|
1113 |
|
---|
1114 | /* for ipv4 add/del modes */
|
---|
1115 | static int if_print(char *ifname)
|
---|
1116 | {
|
---|
1117 | int res;
|
---|
1118 |
|
---|
1119 | if (!ifname) {
|
---|
1120 | res = for_all_interfaces(do_if_print, &interface_opt_a);
|
---|
1121 | } else {
|
---|
1122 | struct interface *ife;
|
---|
1123 |
|
---|
1124 | ife = lookup_interface(ifname);
|
---|
1125 | res = do_if_fetch(ife);
|
---|
1126 | if (res >= 0)
|
---|
1127 | ife_print(ife);
|
---|
1128 | }
|
---|
1129 | return res;
|
---|
1130 | }
|
---|
1131 |
|
---|
1132 | int display_interfaces(char *ifname);
|
---|
1133 | int display_interfaces(char *ifname)
|
---|
1134 | {
|
---|
1135 | int status;
|
---|
1136 |
|
---|
1137 | /* Create a channel to the NET kernel. */
|
---|
1138 | if ((skfd = sockets_open(0)) < 0) {
|
---|
1139 | bb_perror_msg_and_die("socket");
|
---|
1140 | }
|
---|
1141 |
|
---|
1142 | /* Do we have to show the current setup? */
|
---|
1143 | status = if_print(ifname);
|
---|
1144 | #ifdef CONFIG_FEATURE_CLEAN_UP
|
---|
1145 | sockets_close();
|
---|
1146 | #endif
|
---|
1147 | exit(status < 0);
|
---|
1148 | }
|
---|