1 | /* vi: set sw=4 ts=4: */
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2 | /* ifconfig
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3 | *
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4 | * Similar to the standard Unix ifconfig, but with only the necessary
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5 | * parts for AF_INET, and without any printing of if info (for now).
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6 | *
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7 | * Bjorn Wesen, Axis Communications AB
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8 | *
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9 | *
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10 | * Authors of the original ifconfig was:
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11 | * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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12 | *
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13 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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14 | */
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15 |
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16 | /*
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17 | * Heavily modified by Manuel Novoa III Mar 6, 2001
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18 | *
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19 | * From initial port to busybox, removed most of the redundancy by
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20 | * converting to a table-driven approach. Added several (optional)
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21 | * args missing from initial port.
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22 | *
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23 | * Still missing: media, tunnel.
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24 | *
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25 | * 2002-04-20
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26 | * IPV6 support added by Bart Visscher <magick@linux-fan.com>
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27 | */
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28 |
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29 | #include <stdio.h>
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30 | #include <stdlib.h>
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31 | #include <string.h> /* strcmp and friends */
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32 | #include <ctype.h> /* isdigit and friends */
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33 | #include <stddef.h> /* offsetof */
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34 | #include <unistd.h>
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35 | #include <netdb.h>
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36 | #include <sys/ioctl.h>
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37 | #include <net/if.h>
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38 | #include <net/if_arp.h>
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39 | #include <netinet/in.h>
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40 | #if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
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41 | #include <netpacket/packet.h>
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42 | #include <net/ethernet.h>
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43 | #else
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44 | #include <sys/types.h>
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45 | #include <netinet/if_ether.h>
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46 | #endif
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47 | #include "inet_common.h"
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48 | #include "busybox.h"
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49 |
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50 | #ifdef CONFIG_FEATURE_IFCONFIG_SLIP
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51 | # include <net/if_slip.h>
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52 | #endif
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53 |
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54 | /* I don't know if this is needed for busybox or not. Anyone? */
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55 | #define QUESTIONABLE_ALIAS_CASE
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56 |
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57 |
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58 | /* Defines for glibc2.0 users. */
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59 | #ifndef SIOCSIFTXQLEN
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60 | # define SIOCSIFTXQLEN 0x8943
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61 | # define SIOCGIFTXQLEN 0x8942
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62 | #endif
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63 |
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64 | /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
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65 | #ifndef ifr_qlen
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66 | # define ifr_qlen ifr_ifru.ifru_mtu
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67 | #endif
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68 |
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69 | #ifndef IFF_DYNAMIC
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70 | # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
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71 | #endif
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72 |
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73 | #ifdef CONFIG_FEATURE_IPV6
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74 | struct in6_ifreq {
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75 | struct in6_addr ifr6_addr;
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76 | uint32_t ifr6_prefixlen;
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77 | int ifr6_ifindex;
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78 | };
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79 | #endif
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80 |
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81 | /*
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82 | * Here are the bit masks for the "flags" member of struct options below.
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83 | * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'.
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84 | * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg.
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85 | */
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86 | #define N_CLR 0x01
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87 | #define M_CLR 0x02
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88 | #define N_SET 0x04
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89 | #define M_SET 0x08
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90 | #define N_ARG 0x10
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91 | #define M_ARG 0x20
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92 |
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93 | #define M_MASK (M_CLR | M_SET | M_ARG)
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94 | #define N_MASK (N_CLR | N_SET | N_ARG)
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95 | #define SET_MASK (N_SET | M_SET)
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96 | #define CLR_MASK (N_CLR | M_CLR)
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97 | #define SET_CLR_MASK (SET_MASK | CLR_MASK)
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98 | #define ARG_MASK (M_ARG | N_ARG)
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99 |
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100 | /*
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101 | * Here are the bit masks for the "arg_flags" member of struct options below.
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102 | */
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103 |
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104 | /*
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105 | * cast type:
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106 | * 00 int
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107 | * 01 char *
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108 | * 02 HOST_COPY in_ether
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109 | * 03 HOST_COPY INET_resolve
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110 | */
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111 | #define A_CAST_TYPE 0x03
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112 | /*
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113 | * map type:
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114 | * 00 not a map type (mem_start, io_addr, irq)
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115 | * 04 memstart (unsigned long)
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116 | * 08 io_addr (unsigned short)
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117 | * 0C irq (unsigned char)
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118 | */
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119 | #define A_MAP_TYPE 0x0C
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120 | #define A_ARG_REQ 0x10 /* Set if an arg is required. */
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121 | #define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */
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122 | #define A_SET_AFTER 0x40 /* Set a flag at the end. */
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123 | #define A_COLON_CHK 0x80 /* Is this needed? See below. */
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124 | #ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
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125 | #define A_HOSTNAME 0x100 /* Set if it is ip addr. */
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126 | #define A_BROADCAST 0x200 /* Set if it is broadcast addr. */
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127 | #else
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128 | #define A_HOSTNAME 0
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129 | #define A_BROADCAST 0
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130 | #endif
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131 |
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132 | /*
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133 | * These defines are for dealing with the A_CAST_TYPE field.
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134 | */
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135 | #define A_CAST_CHAR_PTR 0x01
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136 | #define A_CAST_RESOLVE 0x01
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137 | #define A_CAST_HOST_COPY 0x02
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138 | #define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY
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139 | #define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE)
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140 |
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141 | /*
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142 | * These defines are for dealing with the A_MAP_TYPE field.
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143 | */
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144 | #define A_MAP_ULONG 0x04 /* memstart */
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145 | #define A_MAP_USHORT 0x08 /* io_addr */
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146 | #define A_MAP_UCHAR 0x0C /* irq */
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147 |
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148 | /*
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149 | * Define the bit masks signifying which operations to perform for each arg.
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150 | */
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151 |
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152 | #define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/)
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153 | #define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/)
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154 | #define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/)
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155 | #define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG)
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156 | #define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG)
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157 | #define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR)
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158 | #define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE)
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159 | #define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK)
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160 | #define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST)
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161 | #define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER)
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162 | #define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
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163 | #define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR)
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164 | #define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR)
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165 | #define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME)
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166 | #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
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167 |
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168 |
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169 | /*
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170 | * Set up the tables. Warning! They must have corresponding order!
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171 | */
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172 |
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173 | struct arg1opt {
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174 | const char *name;
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175 | int selector;
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176 | unsigned short ifr_offset;
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177 | };
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178 |
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179 | struct options {
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180 | const char *name;
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181 | #ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
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182 | const unsigned int flags:6;
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183 | const unsigned int arg_flags:10;
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184 | #else
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185 | const unsigned char flags;
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186 | const unsigned char arg_flags;
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187 | #endif
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188 | const unsigned short selector;
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189 | };
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190 |
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191 | #define ifreq_offsetof(x) offsetof(struct ifreq, x)
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192 |
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193 | static const struct arg1opt Arg1Opt[] = {
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194 | {"SIOCSIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric)},
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195 | {"SIOCSIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu)},
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196 | {"SIOCSIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen)},
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197 | {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)},
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198 | {"SIOCSIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask)},
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199 | {"SIOCSIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr)},
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200 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
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201 | {"SIOCSIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr)},
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202 | #endif
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203 | {"SIOCSIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr)},
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204 | #ifdef SIOCSKEEPALIVE
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205 | {"SIOCSKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data)},
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206 | #endif
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207 | #ifdef SIOCSOUTFILL
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208 | {"SIOCSOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data)},
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209 | #endif
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210 | #ifdef CONFIG_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
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211 | {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start)},
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212 | {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr)},
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213 | {"SIOCSIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq)},
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214 | #endif
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215 | /* Last entry if for unmatched (possibly hostname) arg. */
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216 | #ifdef CONFIG_FEATURE_IPV6
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217 | {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */
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218 | {"SIOCDIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr)}, /* IPv6 version ignores the offset */
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219 | #endif
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220 | {"SIOCSIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr)},
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221 | };
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222 |
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223 | static const struct options OptArray[] = {
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224 | {"metric", N_ARG, ARG_METRIC, 0},
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225 | {"mtu", N_ARG, ARG_MTU, 0},
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226 | {"txqueuelen", N_ARG, ARG_TXQUEUELEN, 0},
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227 | {"dstaddr", N_ARG, ARG_DSTADDR, 0},
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228 | {"netmask", N_ARG, ARG_NETMASK, 0},
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229 | {"broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST},
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230 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
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231 | {"hw", N_ARG, ARG_HW, 0},
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232 | #endif
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233 | {"pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT},
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234 | #ifdef SIOCSKEEPALIVE
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235 | {"keepalive", N_ARG, ARG_KEEPALIVE, 0},
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236 | #endif
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237 | #ifdef SIOCSOUTFILL
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238 | {"outfill", N_ARG, ARG_OUTFILL, 0},
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239 | #endif
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240 | #ifdef CONFIG_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
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241 | {"mem_start", N_ARG, ARG_MEM_START, 0},
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242 | {"io_addr", N_ARG, ARG_IO_ADDR, 0},
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243 | {"irq", N_ARG, ARG_IRQ, 0},
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244 | #endif
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245 | #ifdef CONFIG_FEATURE_IPV6
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246 | {"add", N_ARG, ARG_ADD_DEL, 0},
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247 | {"del", N_ARG, ARG_ADD_DEL, 0},
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248 | #endif
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249 | {"arp", N_CLR | M_SET, 0, IFF_NOARP},
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250 | {"trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS},
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251 | {"promisc", N_SET | M_CLR, 0, IFF_PROMISC},
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252 | {"multicast", N_SET | M_CLR, 0, IFF_MULTICAST},
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253 | {"allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI},
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254 | {"dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC},
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255 | {"up", N_SET, 0, (IFF_UP | IFF_RUNNING)},
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256 | {"down", N_CLR, 0, IFF_UP},
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257 | {NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING)}
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258 | };
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259 |
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260 | /*
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261 | * A couple of prototypes.
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262 | */
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263 |
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264 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
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265 | static int in_ether(char *bufp, struct sockaddr *sap);
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266 | #endif
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267 |
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268 | #ifdef CONFIG_FEATURE_IFCONFIG_STATUS
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269 | extern int interface_opt_a;
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270 | extern int display_interfaces(char *ifname);
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271 | #endif
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272 |
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273 | /*
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274 | * Our main function.
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275 | */
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276 |
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277 | int ifconfig_main(int argc, char **argv)
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278 | {
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279 | struct ifreq ifr;
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280 | struct sockaddr_in sai;
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281 | #ifdef CONFIG_FEATURE_IPV6
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282 | struct sockaddr_in6 sai6;
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283 | #endif
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284 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
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285 | struct sockaddr sa;
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286 | #endif
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287 | const struct arg1opt *a1op;
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288 | const struct options *op;
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289 | int sockfd; /* socket fd we use to manipulate stuff with */
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290 | int goterr;
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291 | int selector;
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292 | #ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
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293 | unsigned int mask;
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294 | unsigned int did_flags;
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295 | unsigned int sai_hostname, sai_netmask;
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296 | #else
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297 | unsigned char mask;
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298 | unsigned char did_flags;
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299 | #endif
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300 | char *p;
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301 | char host[128];
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302 |
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303 | goterr = 0;
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304 | did_flags = 0;
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305 | #ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
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306 | sai_hostname = 0;
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307 | sai_netmask = 0;
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308 | #endif
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309 |
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310 | /* skip argv[0] */
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311 | ++argv;
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312 | --argc;
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313 |
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314 | #ifdef CONFIG_FEATURE_IFCONFIG_STATUS
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315 | if ((argc > 0) && (((*argv)[0] == '-') && ((*argv)[1] == 'a') && !(*argv)[2])) {
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316 | interface_opt_a = 1;
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317 | --argc;
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318 | ++argv;
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319 | }
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320 | #endif
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321 |
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322 | if (argc <= 1) {
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323 | #ifdef CONFIG_FEATURE_IFCONFIG_STATUS
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324 | return display_interfaces(argc ? *argv : NULL);
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325 | #else
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326 | bb_error_msg_and_die
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327 | ("ifconfig was not compiled with interface status display support.");
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328 | #endif
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329 | }
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330 |
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331 | /* Create a channel to the NET kernel. */
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332 | sockfd = bb_xsocket(AF_INET, SOCK_DGRAM, 0);
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333 |
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334 | /* get interface name */
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335 | safe_strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
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336 |
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337 | /* Process the remaining arguments. */
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338 | while (*++argv != (char *) NULL) {
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339 | p = *argv;
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340 | mask = N_MASK;
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341 | if (*p == '-') { /* If the arg starts with '-'... */
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342 | ++p; /* advance past it and */
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343 | mask = M_MASK; /* set the appropriate mask. */
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344 | }
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345 | for (op = OptArray; op->name; op++) { /* Find table entry. */
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346 | if (strcmp(p, op->name) == 0) { /* If name matches... */
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347 | if ((mask &= op->flags)) { /* set the mask and go. */
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348 | goto FOUND_ARG;
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349 | }
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350 | /* If we get here, there was a valid arg with an */
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351 | /* invalid '-' prefix. */
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352 | ++goterr;
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353 | goto LOOP;
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354 | }
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355 | }
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356 |
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357 | /* We fell through, so treat as possible hostname. */
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358 | a1op = Arg1Opt + (sizeof(Arg1Opt) / sizeof(Arg1Opt[0])) - 1;
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359 | mask = op->arg_flags;
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360 | goto HOSTNAME;
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361 |
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362 | FOUND_ARG:
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363 | if (mask & ARG_MASK) {
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364 | mask = op->arg_flags;
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365 | a1op = Arg1Opt + (op - OptArray);
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366 | if (mask & A_NETMASK & did_flags) {
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367 | bb_show_usage();
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368 | }
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369 | if (*++argv == NULL) {
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370 | if (mask & A_ARG_REQ) {
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371 | bb_show_usage();
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372 | } else {
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373 | --argv;
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374 | mask &= A_SET_AFTER; /* just for broadcast */
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375 | }
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376 | } else { /* got an arg so process it */
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377 | HOSTNAME:
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378 | did_flags |= (mask & (A_NETMASK|A_HOSTNAME));
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379 | if (mask & A_CAST_HOST_COPY) {
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380 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
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381 | if (mask & A_CAST_RESOLVE) {
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382 | #endif
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383 | #ifdef CONFIG_FEATURE_IPV6
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384 | char *prefix;
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385 | int prefix_len = 0;
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386 | #endif
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387 |
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388 | safe_strncpy(host, *argv, (sizeof host));
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389 | #ifdef CONFIG_FEATURE_IPV6
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390 | if ((prefix = strchr(host, '/'))) {
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391 | if (safe_strtoi(prefix + 1, &prefix_len) ||
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392 | (prefix_len < 0) || (prefix_len > 128))
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393 | {
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394 | ++goterr;
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395 | goto LOOP;
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396 | }
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397 | *prefix = 0;
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398 | }
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399 | #endif
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400 |
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401 | sai.sin_family = AF_INET;
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402 | sai.sin_port = 0;
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403 | if (!strcmp(host, bb_INET_default)) {
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404 | /* Default is special, meaning 0.0.0.0. */
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405 | sai.sin_addr.s_addr = INADDR_ANY;
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406 | #ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
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407 | } else if (((host[0] == '+') && !host[1]) && (mask & A_BROADCAST) &&
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408 | (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME)) {
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409 | /* + is special, meaning broadcast is derived. */
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410 | sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask);
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411 | #endif
|
---|
412 | #ifdef CONFIG_FEATURE_IPV6
|
---|
413 | } else if (inet_pton(AF_INET6, host, &sai6.sin6_addr) > 0) {
|
---|
414 | int sockfd6;
|
---|
415 | struct in6_ifreq ifr6;
|
---|
416 |
|
---|
417 | memcpy((char *) &ifr6.ifr6_addr,
|
---|
418 | (char *) &sai6.sin6_addr,
|
---|
419 | sizeof(struct in6_addr));
|
---|
420 |
|
---|
421 | /* Create a channel to the NET kernel. */
|
---|
422 | if ((sockfd6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
|
---|
423 | bb_perror_msg_and_die("socket6");
|
---|
424 | }
|
---|
425 | if (ioctl(sockfd6, SIOGIFINDEX, &ifr) < 0) {
|
---|
426 | perror("SIOGIFINDEX");
|
---|
427 | ++goterr;
|
---|
428 | continue;
|
---|
429 | }
|
---|
430 | ifr6.ifr6_ifindex = ifr.ifr_ifindex;
|
---|
431 | ifr6.ifr6_prefixlen = prefix_len;
|
---|
432 | if (ioctl(sockfd6, a1op->selector, &ifr6) < 0) {
|
---|
433 | perror(a1op->name);
|
---|
434 | ++goterr;
|
---|
435 | }
|
---|
436 | continue;
|
---|
437 | #endif
|
---|
438 | } else if (inet_aton(host, &sai.sin_addr) == 0) {
|
---|
439 | /* It's not a dotted quad. */
|
---|
440 | struct hostent *hp;
|
---|
441 | if ((hp = gethostbyname(host)) == (struct hostent *)NULL) {
|
---|
442 | ++goterr;
|
---|
443 | continue;
|
---|
444 | }
|
---|
445 | memcpy((char *) &sai.sin_addr, (char *) hp->h_addr_list[0],
|
---|
446 | sizeof(struct in_addr));
|
---|
447 | }
|
---|
448 | #ifdef CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
449 | if (mask & A_HOSTNAME) {
|
---|
450 | sai_hostname = sai.sin_addr.s_addr;
|
---|
451 | }
|
---|
452 | if (mask & A_NETMASK) {
|
---|
453 | sai_netmask = sai.sin_addr.s_addr;
|
---|
454 | }
|
---|
455 | #endif
|
---|
456 | p = (char *) &sai;
|
---|
457 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
|
---|
458 | } else { /* A_CAST_HOST_COPY_IN_ETHER */
|
---|
459 | /* This is the "hw" arg case. */
|
---|
460 | if (strcmp("ether", *argv) || (*++argv == NULL)) {
|
---|
461 | bb_show_usage();
|
---|
462 | }
|
---|
463 | safe_strncpy(host, *argv, (sizeof host));
|
---|
464 | if (in_ether(host, &sa)) {
|
---|
465 | bb_error_msg("invalid hw-addr %s", host);
|
---|
466 | ++goterr;
|
---|
467 | continue;
|
---|
468 | }
|
---|
469 | p = (char *) &sa;
|
---|
470 | }
|
---|
471 | #endif
|
---|
472 | memcpy((((char *) (&ifr)) + a1op->ifr_offset),
|
---|
473 | p, sizeof(struct sockaddr));
|
---|
474 | } else {
|
---|
475 | unsigned long i = strtoul(*argv, NULL, 0);
|
---|
476 |
|
---|
477 | p = ((char *) (&ifr)) + a1op->ifr_offset;
|
---|
478 | #ifdef CONFIG_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
|
---|
479 | if (mask & A_MAP_TYPE) {
|
---|
480 | if (ioctl(sockfd, SIOCGIFMAP, &ifr) < 0) {
|
---|
481 | ++goterr;
|
---|
482 | continue;
|
---|
483 | }
|
---|
484 | if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR) {
|
---|
485 | *((unsigned char *) p) = i;
|
---|
486 | } else if (mask & A_MAP_USHORT) {
|
---|
487 | *((unsigned short *) p) = i;
|
---|
488 | } else {
|
---|
489 | *((unsigned long *) p) = i;
|
---|
490 | }
|
---|
491 | } else
|
---|
492 | #endif
|
---|
493 | if (mask & A_CAST_CHAR_PTR) {
|
---|
494 | *((caddr_t *) p) = (caddr_t) i;
|
---|
495 | } else { /* A_CAST_INT */
|
---|
496 | *((int *) p) = i;
|
---|
497 | }
|
---|
498 | }
|
---|
499 |
|
---|
500 | if (ioctl(sockfd, a1op->selector, &ifr) < 0) {
|
---|
501 | perror(a1op->name);
|
---|
502 | ++goterr;
|
---|
503 | continue;
|
---|
504 | }
|
---|
505 | #ifdef QUESTIONABLE_ALIAS_CASE
|
---|
506 | if (mask & A_COLON_CHK) {
|
---|
507 | /*
|
---|
508 | * Don't do the set_flag() if the address is an alias with
|
---|
509 | * a - at the end, since it's deleted already! - Roman
|
---|
510 | *
|
---|
511 | * Should really use regex.h here, not sure though how well
|
---|
512 | * it'll go with the cross-platform support etc.
|
---|
513 | */
|
---|
514 | char *ptr;
|
---|
515 | short int found_colon = 0;
|
---|
516 |
|
---|
517 | for (ptr = ifr.ifr_name; *ptr; ptr++) {
|
---|
518 | if (*ptr == ':') {
|
---|
519 | found_colon++;
|
---|
520 | }
|
---|
521 | }
|
---|
522 |
|
---|
523 | if (found_colon && *(ptr - 1) == '-') {
|
---|
524 | continue;
|
---|
525 | }
|
---|
526 | }
|
---|
527 | #endif
|
---|
528 | }
|
---|
529 | if (!(mask & A_SET_AFTER)) {
|
---|
530 | continue;
|
---|
531 | }
|
---|
532 | mask = N_SET;
|
---|
533 | }
|
---|
534 |
|
---|
535 | if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
|
---|
536 | perror("SIOCGIFFLAGS");
|
---|
537 | ++goterr;
|
---|
538 | } else {
|
---|
539 | selector = op->selector;
|
---|
540 | if (mask & SET_MASK) {
|
---|
541 | ifr.ifr_flags |= selector;
|
---|
542 | } else {
|
---|
543 | ifr.ifr_flags &= ~selector;
|
---|
544 | }
|
---|
545 | if (ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
|
---|
546 | perror("SIOCSIFFLAGS");
|
---|
547 | ++goterr;
|
---|
548 | }
|
---|
549 | }
|
---|
550 | LOOP:
|
---|
551 | continue;
|
---|
552 | } /* end of while-loop */
|
---|
553 |
|
---|
554 | if (ENABLE_FEATURE_CLEAN_UP) close(sockfd);
|
---|
555 | return goterr;
|
---|
556 | }
|
---|
557 |
|
---|
558 | #ifdef CONFIG_FEATURE_IFCONFIG_HW
|
---|
559 | /* Input an Ethernet address and convert to binary. */
|
---|
560 | static int in_ether(char *bufp, struct sockaddr *sap)
|
---|
561 | {
|
---|
562 | char *ptr;
|
---|
563 | int i, j;
|
---|
564 | unsigned char val;
|
---|
565 | unsigned char c;
|
---|
566 |
|
---|
567 | sap->sa_family = ARPHRD_ETHER;
|
---|
568 | ptr = sap->sa_data;
|
---|
569 |
|
---|
570 | i = 0;
|
---|
571 | do {
|
---|
572 | j = val = 0;
|
---|
573 |
|
---|
574 | /* We might get a semicolon here - not required. */
|
---|
575 | if (i && (*bufp == ':')) {
|
---|
576 | bufp++;
|
---|
577 | }
|
---|
578 |
|
---|
579 | do {
|
---|
580 | c = *bufp;
|
---|
581 | if (((unsigned char)(c - '0')) <= 9) {
|
---|
582 | c -= '0';
|
---|
583 | } else if (((unsigned char)((c|0x20) - 'a')) <= 5) {
|
---|
584 | c = (c|0x20) - ('a'-10);
|
---|
585 | } else if (j && (c == ':' || c == 0)) {
|
---|
586 | break;
|
---|
587 | } else {
|
---|
588 | return -1;
|
---|
589 | }
|
---|
590 | ++bufp;
|
---|
591 | val <<= 4;
|
---|
592 | val += c;
|
---|
593 | } while (++j < 2);
|
---|
594 | *ptr++ = val;
|
---|
595 | } while (++i < ETH_ALEN);
|
---|
596 |
|
---|
597 | return (int) (*bufp); /* Error if we don't end at end of string. */
|
---|
598 | }
|
---|
599 | #endif
|
---|