1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * ifupdown for busybox
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4 | * Copyright (c) 2002 Glenn McGrath <bug1@iinet.net.au>
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5 | * Copyright (c) 2003-2004 Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Based on ifupdown v 0.6.4 by Anthony Towns
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8 | * Copyright (c) 1999 Anthony Towns <aj@azure.humbug.org.au>
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9 | *
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10 | * Changes to upstream version
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11 | * Remove checks for kernel version, assume kernel version 2.2.0 or better.
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12 | * Lines in the interfaces file cannot wrap.
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13 | * To adhere to the FHS, the default state file is /var/run/ifstate
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14 | * (defined via CONFIG_IFUPDOWN_IFSTATE_PATH) and can be overridden by build
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15 | * configuration.
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16 | *
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17 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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18 | */
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19 |
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20 | #include <sys/utsname.h>
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21 | #include <fnmatch.h>
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22 | #include <getopt.h>
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23 |
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24 | #include "libbb.h"
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25 |
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26 | #define MAX_OPT_DEPTH 10
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27 | #define EUNBALBRACK 10001
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28 | #define EUNDEFVAR 10002
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29 | #define EUNBALPER 10000
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30 |
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31 | #if ENABLE_FEATURE_IFUPDOWN_MAPPING
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32 | #define MAX_INTERFACE_LENGTH 10
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33 | #endif
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34 |
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35 | #define debug_noise(args...) /*fprintf(stderr, args)*/
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36 |
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37 | /* Forward declaration */
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38 | struct interface_defn_t;
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39 |
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40 | typedef int execfn(char *command);
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41 |
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42 | struct method_t {
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43 | const char *name;
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44 | int (*up)(struct interface_defn_t *ifd, execfn *e);
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45 | int (*down)(struct interface_defn_t *ifd, execfn *e);
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46 | };
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47 |
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48 | struct address_family_t {
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49 | const char *name;
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50 | int n_methods;
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51 | const struct method_t *method;
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52 | };
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53 |
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54 | struct mapping_defn_t {
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55 | struct mapping_defn_t *next;
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56 |
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57 | int max_matches;
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58 | int n_matches;
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59 | char **match;
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60 |
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61 | char *script;
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62 |
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63 | int max_mappings;
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64 | int n_mappings;
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65 | char **mapping;
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66 | };
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67 |
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68 | struct variable_t {
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69 | char *name;
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70 | char *value;
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71 | };
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72 |
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73 | struct interface_defn_t {
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74 | const struct address_family_t *address_family;
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75 | const struct method_t *method;
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76 |
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77 | char *iface;
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78 | int max_options;
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79 | int n_options;
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80 | struct variable_t *option;
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81 | };
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82 |
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83 | struct interfaces_file_t {
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84 | llist_t *autointerfaces;
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85 | llist_t *ifaces;
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86 | struct mapping_defn_t *mappings;
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87 | };
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88 |
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89 | #define OPTION_STR "anvf" USE_FEATURE_IFUPDOWN_MAPPING("m") "i:"
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90 | enum {
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91 | OPT_do_all = 0x1,
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92 | OPT_no_act = 0x2,
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93 | OPT_verbose = 0x4,
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94 | OPT_force = 0x8,
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95 | OPT_no_mappings = 0x10,
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96 | };
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97 | #define DO_ALL (option_mask32 & OPT_do_all)
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98 | #define NO_ACT (option_mask32 & OPT_no_act)
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99 | #define VERBOSE (option_mask32 & OPT_verbose)
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100 | #define FORCE (option_mask32 & OPT_force)
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101 | #define NO_MAPPINGS (option_mask32 & OPT_no_mappings)
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102 |
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103 | static char **my_environ;
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104 |
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105 | static const char *startup_PATH;
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106 |
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107 | #if ENABLE_FEATURE_IFUPDOWN_IPV4 || ENABLE_FEATURE_IFUPDOWN_IPV6
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108 |
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109 | static void addstr(char **bufp, const char *str, size_t str_length)
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110 | {
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111 | /* xasprintf trick will be smaller, but we are often
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112 | * called with str_length == 1 - don't want to have
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113 | * THAT much of malloc/freeing! */
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114 | char *buf = *bufp;
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115 | int len = (buf ? strlen(buf) : 0);
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116 | str_length++;
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117 | buf = xrealloc(buf, len + str_length);
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118 | /* copies at most str_length-1 chars! */
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119 | safe_strncpy(buf + len, str, str_length);
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120 | *bufp = buf;
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121 | }
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122 |
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123 | static int strncmpz(const char *l, const char *r, size_t llen)
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124 | {
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125 | int i = strncmp(l, r, llen);
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126 |
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127 | if (i == 0)
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128 | return -r[llen];
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129 | return i;
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130 | }
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131 |
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132 | static char *get_var(const char *id, size_t idlen, struct interface_defn_t *ifd)
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133 | {
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134 | int i;
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135 |
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136 | if (strncmpz(id, "iface", idlen) == 0) {
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137 | char *result;
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138 | static char label_buf[20];
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139 | safe_strncpy(label_buf, ifd->iface, sizeof(label_buf));
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140 | result = strchr(label_buf, ':');
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141 | if (result) {
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142 | *result = '\0';
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143 | }
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144 | return label_buf;
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145 | }
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146 | if (strncmpz(id, "label", idlen) == 0) {
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147 | return ifd->iface;
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148 | }
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149 | for (i = 0; i < ifd->n_options; i++) {
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150 | if (strncmpz(id, ifd->option[i].name, idlen) == 0) {
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151 | return ifd->option[i].value;
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152 | }
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153 | }
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154 | return NULL;
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155 | }
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156 |
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157 | #if ENABLE_FEATURE_IFUPDOWN_IP
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158 | static int count_netmask_bits(const char *dotted_quad)
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159 | {
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160 | // int result;
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161 | // unsigned a, b, c, d;
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162 | // /* Found a netmask... Check if it is dotted quad */
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163 | // if (sscanf(dotted_quad, "%u.%u.%u.%u", &a, &b, &c, &d) != 4)
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164 | // return -1;
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165 | // if ((a|b|c|d) >> 8)
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166 | // return -1; /* one of numbers is >= 256 */
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167 | // d |= (a << 24) | (b << 16) | (c << 8); /* IP */
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168 | // d = ~d; /* 11110000 -> 00001111 */
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169 |
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170 | /* Shorter version */
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171 | int result;
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172 | struct in_addr ip;
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173 | unsigned d;
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174 |
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175 | if (inet_aton(dotted_quad, &ip) == 0)
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176 | return -1; /* malformed dotted IP */
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177 | d = ntohl(ip.s_addr); /* IP in host order */
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178 | d = ~d; /* 11110000 -> 00001111 */
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179 | if (d & (d+1)) /* check that it is in 00001111 form */
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180 | return -1; /* no it is not */
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181 | result = 32;
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182 | while (d) {
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183 | d >>= 1;
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184 | result--;
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185 | }
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186 | return result;
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187 | }
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188 | #endif
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189 |
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190 | static char *parse(const char *command, struct interface_defn_t *ifd)
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191 | {
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192 | size_t old_pos[MAX_OPT_DEPTH] = { 0 };
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193 | int okay[MAX_OPT_DEPTH] = { 1 };
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194 | int opt_depth = 1;
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195 | char *result = NULL;
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196 |
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197 | while (*command) {
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198 | switch (*command) {
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199 | default:
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200 | addstr(&result, command, 1);
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201 | command++;
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202 | break;
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203 | case '\\':
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204 | if (command[1]) {
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205 | addstr(&result, command + 1, 1);
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206 | command += 2;
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207 | } else {
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208 | addstr(&result, command, 1);
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209 | command++;
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210 | }
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211 | break;
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212 | case '[':
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213 | if (command[1] == '[' && opt_depth < MAX_OPT_DEPTH) {
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214 | old_pos[opt_depth] = result ? strlen(result) : 0;
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215 | okay[opt_depth] = 1;
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216 | opt_depth++;
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217 | command += 2;
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218 | } else {
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219 | addstr(&result, "[", 1);
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220 | command++;
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221 | }
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222 | break;
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223 | case ']':
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224 | if (command[1] == ']' && opt_depth > 1) {
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225 | opt_depth--;
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226 | if (!okay[opt_depth]) {
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227 | result[old_pos[opt_depth]] = '\0';
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228 | }
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229 | command += 2;
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230 | } else {
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231 | addstr(&result, "]", 1);
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232 | command++;
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233 | }
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234 | break;
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235 | case '%':
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236 | {
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237 | char *nextpercent;
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238 | char *varvalue;
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239 |
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240 | command++;
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241 | nextpercent = strchr(command, '%');
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242 | if (!nextpercent) {
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243 | errno = EUNBALPER;
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244 | free(result);
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245 | return NULL;
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246 | }
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247 |
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248 | varvalue = get_var(command, nextpercent - command, ifd);
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249 |
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250 | if (varvalue) {
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251 | addstr(&result, varvalue, strlen(varvalue));
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252 | } else {
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253 | #if ENABLE_FEATURE_IFUPDOWN_IP
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254 | /* Sigh... Add a special case for 'ip' to convert from
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255 | * dotted quad to bit count style netmasks. */
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256 | if (strncmp(command, "bnmask", 6) == 0) {
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257 | unsigned res;
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258 | varvalue = get_var("netmask", 7, ifd);
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259 | if (varvalue) {
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260 | res = count_netmask_bits(varvalue);
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261 | if (res > 0) {
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262 | const char *argument = utoa(res);
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263 | addstr(&result, argument, strlen(argument));
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264 | command = nextpercent + 1;
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265 | break;
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266 | }
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267 | }
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268 | }
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269 | #endif
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270 | okay[opt_depth - 1] = 0;
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271 | }
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272 |
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273 | command = nextpercent + 1;
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274 | }
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275 | break;
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276 | }
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277 | }
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278 |
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279 | if (opt_depth > 1) {
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280 | errno = EUNBALBRACK;
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281 | free(result);
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282 | return NULL;
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283 | }
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284 |
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285 | if (!okay[0]) {
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286 | errno = EUNDEFVAR;
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287 | free(result);
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288 | return NULL;
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289 | }
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290 |
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291 | return result;
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292 | }
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293 |
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294 | /* execute() returns 1 for success and 0 for failure */
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295 | static int execute(const char *command, struct interface_defn_t *ifd, execfn *exec)
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296 | {
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297 | char *out;
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298 | int ret;
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299 |
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300 | out = parse(command, ifd);
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301 | if (!out) {
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302 | /* parse error? */
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303 | return 0;
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304 | }
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305 | /* out == "": parsed ok but not all needed variables known, skip */
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306 | ret = out[0] ? (*exec)(out) : 1;
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307 |
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308 | free(out);
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309 | if (ret != 1) {
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310 | return 0;
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311 | }
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312 | return 1;
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313 | }
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314 | #endif
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315 |
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316 | #if ENABLE_FEATURE_IFUPDOWN_IPV6
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317 | static int loopback_up6(struct interface_defn_t *ifd, execfn *exec)
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318 | {
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319 | #if ENABLE_FEATURE_IFUPDOWN_IP
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320 | int result;
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321 | result = execute("ip addr add ::1 dev %iface%", ifd, exec);
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322 | result += execute("ip link set %iface% up", ifd, exec);
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323 | return ((result == 2) ? 2 : 0);
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324 | #else
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325 | return execute("ifconfig %iface% add ::1", ifd, exec);
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326 | #endif
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327 | }
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328 |
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329 | static int loopback_down6(struct interface_defn_t *ifd, execfn *exec)
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330 | {
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331 | #if ENABLE_FEATURE_IFUPDOWN_IP
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332 | return execute("ip link set %iface% down", ifd, exec);
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333 | #else
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334 | return execute("ifconfig %iface% del ::1", ifd, exec);
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335 | #endif
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336 | }
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337 |
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338 | static int static_up6(struct interface_defn_t *ifd, execfn *exec)
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339 | {
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340 | int result;
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341 | #if ENABLE_FEATURE_IFUPDOWN_IP
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342 | result = execute("ip addr add %address%/%netmask% dev %iface%[[ label %label%]]", ifd, exec);
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343 | result += execute("ip link set[[ mtu %mtu%]][[ address %hwaddress%]] %iface% up", ifd, exec);
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344 | /* Was: "[[ ip ....%gateway% ]]". Removed extra spaces w/o checking */
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345 | result += execute("[[ip route add ::/0 via %gateway%]]", ifd, exec);
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346 | #else
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347 | result = execute("ifconfig %iface%[[ media %media%]][[ hw %hwaddress%]][[ mtu %mtu%]] up", ifd, exec);
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348 | result += execute("ifconfig %iface% add %address%/%netmask%", ifd, exec);
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349 | result += execute("[[route -A inet6 add ::/0 gw %gateway%]]", ifd, exec);
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350 | #endif
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351 | return ((result == 3) ? 3 : 0);
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352 | }
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353 |
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354 | static int static_down6(struct interface_defn_t *ifd, execfn *exec)
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355 | {
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356 | #if ENABLE_FEATURE_IFUPDOWN_IP
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357 | return execute("ip link set %iface% down", ifd, exec);
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358 | #else
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359 | return execute("ifconfig %iface% down", ifd, exec);
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360 | #endif
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361 | }
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362 |
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363 | #if ENABLE_FEATURE_IFUPDOWN_IP
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364 | static int v4tunnel_up(struct interface_defn_t *ifd, execfn *exec)
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365 | {
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366 | int result;
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367 | result = execute("ip tunnel add %iface% mode sit remote "
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368 | "%endpoint%[[ local %local%]][[ ttl %ttl%]]", ifd, exec);
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369 | result += execute("ip link set %iface% up", ifd, exec);
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370 | result += execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec);
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371 | result += execute("[[ip route add ::/0 via %gateway%]]", ifd, exec);
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372 | return ((result == 4) ? 4 : 0);
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373 | }
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374 |
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375 | static int v4tunnel_down(struct interface_defn_t * ifd, execfn * exec)
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376 | {
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377 | return execute("ip tunnel del %iface%", ifd, exec);
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378 | }
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379 | #endif
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380 |
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381 | static const struct method_t methods6[] = {
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382 | #if ENABLE_FEATURE_IFUPDOWN_IP
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383 | { "v4tunnel", v4tunnel_up, v4tunnel_down, },
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384 | #endif
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385 | { "static", static_up6, static_down6, },
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386 | { "loopback", loopback_up6, loopback_down6, },
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387 | };
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388 |
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389 | static const struct address_family_t addr_inet6 = {
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390 | "inet6",
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391 | ARRAY_SIZE(methods6),
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392 | methods6
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393 | };
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394 | #endif /* FEATURE_IFUPDOWN_IPV6 */
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395 |
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396 | #if ENABLE_FEATURE_IFUPDOWN_IPV4
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397 | static int loopback_up(struct interface_defn_t *ifd, execfn *exec)
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398 | {
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399 | #if ENABLE_FEATURE_IFUPDOWN_IP
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400 | int result;
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401 | result = execute("ip addr add 127.0.0.1/8 dev %iface%", ifd, exec);
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402 | result += execute("ip link set %iface% up", ifd, exec);
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403 | return ((result == 2) ? 2 : 0);
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404 | #else
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405 | return execute("ifconfig %iface% 127.0.0.1 up", ifd, exec);
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406 | #endif
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407 | }
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408 |
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409 | static int loopback_down(struct interface_defn_t *ifd, execfn *exec)
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410 | {
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411 | #if ENABLE_FEATURE_IFUPDOWN_IP
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412 | int result;
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413 | result = execute("ip addr flush dev %iface%", ifd, exec);
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414 | result += execute("ip link set %iface% down", ifd, exec);
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415 | return ((result == 2) ? 2 : 0);
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416 | #else
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417 | return execute("ifconfig %iface% 127.0.0.1 down", ifd, exec);
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418 | #endif
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419 | }
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420 |
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421 | static int static_up(struct interface_defn_t *ifd, execfn *exec)
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422 | {
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423 | int result;
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424 | #if ENABLE_FEATURE_IFUPDOWN_IP
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425 | result = execute("ip addr add %address%/%bnmask%[[ broadcast %broadcast%]] "
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426 | "dev %iface%[[ peer %pointopoint%]][[ label %label%]]", ifd, exec);
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427 | result += execute("ip link set[[ mtu %mtu%]][[ address %hwaddress%]] %iface% up", ifd, exec);
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428 | result += execute("[[ip route add default via %gateway% dev %iface%]]", ifd, exec);
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429 | return ((result == 3) ? 3 : 0);
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430 | #else
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431 | /* ifconfig said to set iface up before it processes hw %hwaddress%,
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432 | * which then of course fails. Thus we run two separate ifconfig */
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433 | result = execute("ifconfig %iface%[[ hw %hwaddress%]][[ media %media%]][[ mtu %mtu%]] up",
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434 | ifd, exec);
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435 | result += execute("ifconfig %iface% %address% netmask %netmask%"
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436 | "[[ broadcast %broadcast%]][[ pointopoint %pointopoint%]] ",
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437 | ifd, exec);
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438 | result += execute("[[route add default gw %gateway% %iface%]]", ifd, exec);
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439 | return ((result == 3) ? 3 : 0);
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440 | #endif
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441 | }
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442 |
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443 | static int static_down(struct interface_defn_t *ifd, execfn *exec)
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444 | {
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445 | int result;
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446 | #if ENABLE_FEATURE_IFUPDOWN_IP
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447 | result = execute("ip addr flush dev %iface%", ifd, exec);
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448 | result += execute("ip link set %iface% down", ifd, exec);
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449 | #else
|
---|
450 | result = execute("[[route del default gw %gateway% %iface%]]", ifd, exec);
|
---|
451 | result += execute("ifconfig %iface% down", ifd, exec);
|
---|
452 | #endif
|
---|
453 | return ((result == 2) ? 2 : 0);
|
---|
454 | }
|
---|
455 |
|
---|
456 | #if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
|
---|
457 | struct dhcp_client_t
|
---|
458 | {
|
---|
459 | const char *name;
|
---|
460 | const char *startcmd;
|
---|
461 | const char *stopcmd;
|
---|
462 | };
|
---|
463 |
|
---|
464 | static const struct dhcp_client_t ext_dhcp_clients[] = {
|
---|
465 | { "dhcpcd",
|
---|
466 | "dhcpcd[[ -h %hostname%]][[ -i %vendor%]][[ -I %clientid%]][[ -l %leasetime%]] %iface%",
|
---|
467 | "dhcpcd -k %iface%",
|
---|
468 | },
|
---|
469 | { "dhclient",
|
---|
470 | "dhclient -pf /var/run/dhclient.%iface%.pid %iface%",
|
---|
471 | "kill -9 `cat /var/run/dhclient.%iface%.pid` 2>/dev/null",
|
---|
472 | },
|
---|
473 | { "pump",
|
---|
474 | "pump -i %iface%[[ -h %hostname%]][[ -l %leasehours%]]",
|
---|
475 | "pump -i %iface% -k",
|
---|
476 | },
|
---|
477 | { "udhcpc",
|
---|
478 | "udhcpc -R -n -p /var/run/udhcpc.%iface%.pid -i %iface%[[ -H %hostname%]][[ -c %clientid%]][[ -s %script%]]",
|
---|
479 | "kill `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null",
|
---|
480 | },
|
---|
481 | };
|
---|
482 | #endif /* ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCPC */
|
---|
483 |
|
---|
484 | static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
485 | {
|
---|
486 | #if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
|
---|
487 | int i;
|
---|
488 | #if ENABLE_FEATURE_IFUPDOWN_IP
|
---|
489 | /* ip doesn't up iface when it configures it (unlike ifconfig) */
|
---|
490 | if (!execute("ip link set %iface% up", ifd, exec))
|
---|
491 | return 0;
|
---|
492 | #endif
|
---|
493 | for (i = 0; i < ARRAY_SIZE(ext_dhcp_clients); i++) {
|
---|
494 | if (exists_execable(ext_dhcp_clients[i].name))
|
---|
495 | return execute(ext_dhcp_clients[i].startcmd, ifd, exec);
|
---|
496 | }
|
---|
497 | bb_error_msg("no dhcp clients found");
|
---|
498 | return 0;
|
---|
499 | #elif ENABLE_APP_UDHCPC
|
---|
500 | #if ENABLE_FEATURE_IFUPDOWN_IP
|
---|
501 | /* ip doesn't up iface when it configures it (unlike ifconfig) */
|
---|
502 | if (!execute("ip link set %iface% up", ifd, exec))
|
---|
503 | return 0;
|
---|
504 | #endif
|
---|
505 | return execute("udhcpc -R -n -p /var/run/udhcpc.%iface%.pid "
|
---|
506 | "-i %iface%[[ -H %hostname%]][[ -c %clientid%]][[ -s %script%]]",
|
---|
507 | ifd, exec);
|
---|
508 | #else
|
---|
509 | return 0; /* no dhcp support */
|
---|
510 | #endif
|
---|
511 | }
|
---|
512 |
|
---|
513 | static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
514 | {
|
---|
515 | #if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
|
---|
516 | int i;
|
---|
517 | for (i = 0; i < ARRAY_SIZE(ext_dhcp_clients); i++) {
|
---|
518 | if (exists_execable(ext_dhcp_clients[i].name))
|
---|
519 | return execute(ext_dhcp_clients[i].stopcmd, ifd, exec);
|
---|
520 | }
|
---|
521 | bb_error_msg("no dhcp clients found, using static interface shutdown");
|
---|
522 | return static_down(ifd, exec);
|
---|
523 | #elif ENABLE_APP_UDHCPC
|
---|
524 | return execute("kill "
|
---|
525 | "`cat /var/run/udhcpc.%iface%.pid` 2>/dev/null", ifd, exec);
|
---|
526 | #else
|
---|
527 | return 0; /* no dhcp support */
|
---|
528 | #endif
|
---|
529 | }
|
---|
530 |
|
---|
531 | static int manual_up_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
532 | {
|
---|
533 | return 1;
|
---|
534 | }
|
---|
535 |
|
---|
536 | static int bootp_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
537 | {
|
---|
538 | return execute("bootpc[[ --bootfile %bootfile%]] --dev %iface%"
|
---|
539 | "[[ --server %server%]][[ --hwaddr %hwaddr%]]"
|
---|
540 | " --returniffail --serverbcast", ifd, exec);
|
---|
541 | }
|
---|
542 |
|
---|
543 | static int ppp_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
544 | {
|
---|
545 | return execute("pon[[ %provider%]]", ifd, exec);
|
---|
546 | }
|
---|
547 |
|
---|
548 | static int ppp_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
549 | {
|
---|
550 | return execute("poff[[ %provider%]]", ifd, exec);
|
---|
551 | }
|
---|
552 |
|
---|
553 | static int wvdial_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
554 | {
|
---|
555 | return execute("start-stop-daemon --start -x wvdial "
|
---|
556 | "-p /var/run/wvdial.%iface% -b -m --[[ %provider%]]", ifd, exec);
|
---|
557 | }
|
---|
558 |
|
---|
559 | static int wvdial_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
560 | {
|
---|
561 | return execute("start-stop-daemon --stop -x wvdial "
|
---|
562 | "-p /var/run/wvdial.%iface% -s 2", ifd, exec);
|
---|
563 | }
|
---|
564 |
|
---|
565 | static const struct method_t methods[] = {
|
---|
566 | { "manual", manual_up_down, manual_up_down, },
|
---|
567 | { "wvdial", wvdial_up, wvdial_down, },
|
---|
568 | { "ppp", ppp_up, ppp_down, },
|
---|
569 | { "static", static_up, static_down, },
|
---|
570 | { "bootp", bootp_up, static_down, },
|
---|
571 | { "dhcp", dhcp_up, dhcp_down, },
|
---|
572 | { "loopback", loopback_up, loopback_down, },
|
---|
573 | };
|
---|
574 |
|
---|
575 | static const struct address_family_t addr_inet = {
|
---|
576 | "inet",
|
---|
577 | ARRAY_SIZE(methods),
|
---|
578 | methods
|
---|
579 | };
|
---|
580 |
|
---|
581 | #endif /* if ENABLE_FEATURE_IFUPDOWN_IPV4 */
|
---|
582 |
|
---|
583 | static char *next_word(char **buf)
|
---|
584 | {
|
---|
585 | unsigned short length;
|
---|
586 | char *word;
|
---|
587 |
|
---|
588 | if (!buf || !*buf || !**buf) {
|
---|
589 | return NULL;
|
---|
590 | }
|
---|
591 |
|
---|
592 | /* Skip over leading whitespace */
|
---|
593 | word = skip_whitespace(*buf);
|
---|
594 |
|
---|
595 | /* Skip over comments */
|
---|
596 | if (*word == '#') {
|
---|
597 | return NULL;
|
---|
598 | }
|
---|
599 |
|
---|
600 | /* Find the length of this word */
|
---|
601 | length = strcspn(word, " \t\n");
|
---|
602 | if (length == 0) {
|
---|
603 | return NULL;
|
---|
604 | }
|
---|
605 | *buf = word + length;
|
---|
606 | /*DBU:[dave@cray.com] if we are already at EOL dont't increment beyond it */
|
---|
607 | if (**buf) {
|
---|
608 | **buf = '\0';
|
---|
609 | (*buf)++;
|
---|
610 | }
|
---|
611 |
|
---|
612 | return word;
|
---|
613 | }
|
---|
614 |
|
---|
615 | static const struct address_family_t *get_address_family(const struct address_family_t *const af[], char *name)
|
---|
616 | {
|
---|
617 | int i;
|
---|
618 |
|
---|
619 | if (!name)
|
---|
620 | return NULL;
|
---|
621 |
|
---|
622 | for (i = 0; af[i]; i++) {
|
---|
623 | if (strcmp(af[i]->name, name) == 0) {
|
---|
624 | return af[i];
|
---|
625 | }
|
---|
626 | }
|
---|
627 | return NULL;
|
---|
628 | }
|
---|
629 |
|
---|
630 | static const struct method_t *get_method(const struct address_family_t *af, char *name)
|
---|
631 | {
|
---|
632 | int i;
|
---|
633 |
|
---|
634 | if (!name)
|
---|
635 | return NULL;
|
---|
636 |
|
---|
637 | for (i = 0; i < af->n_methods; i++) {
|
---|
638 | if (strcmp(af->method[i].name, name) == 0) {
|
---|
639 | return &af->method[i];
|
---|
640 | }
|
---|
641 | }
|
---|
642 | return NULL;
|
---|
643 | }
|
---|
644 |
|
---|
645 | static const llist_t *find_list_string(const llist_t *list, const char *string)
|
---|
646 | {
|
---|
647 | if (string == NULL)
|
---|
648 | return NULL;
|
---|
649 |
|
---|
650 | while (list) {
|
---|
651 | if (strcmp(list->data, string) == 0) {
|
---|
652 | return list;
|
---|
653 | }
|
---|
654 | list = list->link;
|
---|
655 | }
|
---|
656 | return NULL;
|
---|
657 | }
|
---|
658 |
|
---|
659 | static struct interfaces_file_t *read_interfaces(const char *filename)
|
---|
660 | {
|
---|
661 | #if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
---|
662 | struct mapping_defn_t *currmap = NULL;
|
---|
663 | #endif
|
---|
664 | struct interface_defn_t *currif = NULL;
|
---|
665 | struct interfaces_file_t *defn;
|
---|
666 | FILE *f;
|
---|
667 | char *firstword;
|
---|
668 | char *buf;
|
---|
669 |
|
---|
670 | enum { NONE, IFACE, MAPPING } currently_processing = NONE;
|
---|
671 |
|
---|
672 | defn = xzalloc(sizeof(struct interfaces_file_t));
|
---|
673 |
|
---|
674 | f = xfopen(filename, "r");
|
---|
675 |
|
---|
676 | while ((buf = xmalloc_getline(f)) != NULL) {
|
---|
677 | char *buf_ptr = buf;
|
---|
678 |
|
---|
679 | firstword = next_word(&buf_ptr);
|
---|
680 | if (firstword == NULL) {
|
---|
681 | free(buf);
|
---|
682 | continue; /* blank line */
|
---|
683 | }
|
---|
684 |
|
---|
685 | if (strcmp(firstword, "mapping") == 0) {
|
---|
686 | #if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
---|
687 | currmap = xzalloc(sizeof(struct mapping_defn_t));
|
---|
688 |
|
---|
689 | while ((firstword = next_word(&buf_ptr)) != NULL) {
|
---|
690 | if (currmap->max_matches == currmap->n_matches) {
|
---|
691 | currmap->max_matches = currmap->max_matches * 2 + 1;
|
---|
692 | currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
|
---|
693 | }
|
---|
694 |
|
---|
695 | currmap->match[currmap->n_matches++] = xstrdup(firstword);
|
---|
696 | }
|
---|
697 | currmap->max_mappings = 0;
|
---|
698 | currmap->n_mappings = 0;
|
---|
699 | currmap->mapping = NULL;
|
---|
700 | currmap->script = NULL;
|
---|
701 | {
|
---|
702 | struct mapping_defn_t **where = &defn->mappings;
|
---|
703 | while (*where != NULL) {
|
---|
704 | where = &(*where)->next;
|
---|
705 | }
|
---|
706 | *where = currmap;
|
---|
707 | currmap->next = NULL;
|
---|
708 | }
|
---|
709 | debug_noise("Added mapping\n");
|
---|
710 | #endif
|
---|
711 | currently_processing = MAPPING;
|
---|
712 | } else if (strcmp(firstword, "iface") == 0) {
|
---|
713 | static const struct address_family_t *const addr_fams[] = {
|
---|
714 | #if ENABLE_FEATURE_IFUPDOWN_IPV4
|
---|
715 | &addr_inet,
|
---|
716 | #endif
|
---|
717 | #if ENABLE_FEATURE_IFUPDOWN_IPV6
|
---|
718 | &addr_inet6,
|
---|
719 | #endif
|
---|
720 | NULL
|
---|
721 | };
|
---|
722 |
|
---|
723 | char *iface_name;
|
---|
724 | char *address_family_name;
|
---|
725 | char *method_name;
|
---|
726 | llist_t *iface_list;
|
---|
727 |
|
---|
728 | currif = xzalloc(sizeof(struct interface_defn_t));
|
---|
729 | iface_name = next_word(&buf_ptr);
|
---|
730 | address_family_name = next_word(&buf_ptr);
|
---|
731 | method_name = next_word(&buf_ptr);
|
---|
732 |
|
---|
733 | if (buf_ptr == NULL) {
|
---|
734 | bb_error_msg("too few parameters for line \"%s\"", buf);
|
---|
735 | return NULL;
|
---|
736 | }
|
---|
737 |
|
---|
738 | /* ship any trailing whitespace */
|
---|
739 | buf_ptr = skip_whitespace(buf_ptr);
|
---|
740 |
|
---|
741 | if (buf_ptr[0] != '\0') {
|
---|
742 | bb_error_msg("too many parameters \"%s\"", buf);
|
---|
743 | return NULL;
|
---|
744 | }
|
---|
745 |
|
---|
746 | currif->iface = xstrdup(iface_name);
|
---|
747 |
|
---|
748 | currif->address_family = get_address_family(addr_fams, address_family_name);
|
---|
749 | if (!currif->address_family) {
|
---|
750 | bb_error_msg("unknown address type \"%s\"", address_family_name);
|
---|
751 | return NULL;
|
---|
752 | }
|
---|
753 |
|
---|
754 | currif->method = get_method(currif->address_family, method_name);
|
---|
755 | if (!currif->method) {
|
---|
756 | bb_error_msg("unknown method \"%s\"", method_name);
|
---|
757 | return NULL;
|
---|
758 | }
|
---|
759 |
|
---|
760 | for (iface_list = defn->ifaces; iface_list; iface_list = iface_list->link) {
|
---|
761 | struct interface_defn_t *tmp = (struct interface_defn_t *) iface_list->data;
|
---|
762 | if ((strcmp(tmp->iface, currif->iface) == 0) &&
|
---|
763 | (tmp->address_family == currif->address_family)) {
|
---|
764 | bb_error_msg("duplicate interface \"%s\"", tmp->iface);
|
---|
765 | return NULL;
|
---|
766 | }
|
---|
767 | }
|
---|
768 | llist_add_to_end(&(defn->ifaces), (char*)currif);
|
---|
769 |
|
---|
770 | debug_noise("iface %s %s %s\n", currif->iface, address_family_name, method_name);
|
---|
771 | currently_processing = IFACE;
|
---|
772 | } else if (strcmp(firstword, "auto") == 0) {
|
---|
773 | while ((firstword = next_word(&buf_ptr)) != NULL) {
|
---|
774 |
|
---|
775 | /* Check the interface isnt already listed */
|
---|
776 | if (find_list_string(defn->autointerfaces, firstword)) {
|
---|
777 | bb_perror_msg_and_die("interface declared auto twice \"%s\"", buf);
|
---|
778 | }
|
---|
779 |
|
---|
780 | /* Add the interface to the list */
|
---|
781 | llist_add_to_end(&(defn->autointerfaces), xstrdup(firstword));
|
---|
782 | debug_noise("\nauto %s\n", firstword);
|
---|
783 | }
|
---|
784 | currently_processing = NONE;
|
---|
785 | } else {
|
---|
786 | switch (currently_processing) {
|
---|
787 | case IFACE:
|
---|
788 | {
|
---|
789 | int i;
|
---|
790 |
|
---|
791 | if (strlen(buf_ptr) == 0) {
|
---|
792 | bb_error_msg("option with empty value \"%s\"", buf);
|
---|
793 | return NULL;
|
---|
794 | }
|
---|
795 |
|
---|
796 | if (strcmp(firstword, "up") != 0
|
---|
797 | && strcmp(firstword, "down") != 0
|
---|
798 | && strcmp(firstword, "pre-up") != 0
|
---|
799 | && strcmp(firstword, "post-down") != 0) {
|
---|
800 | for (i = 0; i < currif->n_options; i++) {
|
---|
801 | if (strcmp(currif->option[i].name, firstword) == 0) {
|
---|
802 | bb_error_msg("duplicate option \"%s\"", buf);
|
---|
803 | return NULL;
|
---|
804 | }
|
---|
805 | }
|
---|
806 | }
|
---|
807 | }
|
---|
808 | if (currif->n_options >= currif->max_options) {
|
---|
809 | struct variable_t *opt;
|
---|
810 |
|
---|
811 | currif->max_options = currif->max_options + 10;
|
---|
812 | opt = xrealloc(currif->option, sizeof(*opt) * currif->max_options);
|
---|
813 | currif->option = opt;
|
---|
814 | }
|
---|
815 | currif->option[currif->n_options].name = xstrdup(firstword);
|
---|
816 | currif->option[currif->n_options].value = xstrdup(buf_ptr);
|
---|
817 | if (!currif->option[currif->n_options].name) {
|
---|
818 | perror(filename);
|
---|
819 | return NULL;
|
---|
820 | }
|
---|
821 | if (!currif->option[currif->n_options].value) {
|
---|
822 | perror(filename);
|
---|
823 | return NULL;
|
---|
824 | }
|
---|
825 | debug_noise("\t%s=%s\n", currif->option[currif->n_options].name,
|
---|
826 | currif->option[currif->n_options].value);
|
---|
827 | currif->n_options++;
|
---|
828 | break;
|
---|
829 | case MAPPING:
|
---|
830 | #if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
---|
831 | if (strcmp(firstword, "script") == 0) {
|
---|
832 | if (currmap->script != NULL) {
|
---|
833 | bb_error_msg("duplicate script in mapping \"%s\"", buf);
|
---|
834 | return NULL;
|
---|
835 | } else {
|
---|
836 | currmap->script = xstrdup(next_word(&buf_ptr));
|
---|
837 | }
|
---|
838 | } else if (strcmp(firstword, "map") == 0) {
|
---|
839 | if (currmap->max_mappings == currmap->n_mappings) {
|
---|
840 | currmap->max_mappings = currmap->max_mappings * 2 + 1;
|
---|
841 | currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
|
---|
842 | }
|
---|
843 | currmap->mapping[currmap->n_mappings] = xstrdup(next_word(&buf_ptr));
|
---|
844 | currmap->n_mappings++;
|
---|
845 | } else {
|
---|
846 | bb_error_msg("misplaced option \"%s\"", buf);
|
---|
847 | return NULL;
|
---|
848 | }
|
---|
849 | #endif
|
---|
850 | break;
|
---|
851 | case NONE:
|
---|
852 | default:
|
---|
853 | bb_error_msg("misplaced option \"%s\"", buf);
|
---|
854 | return NULL;
|
---|
855 | }
|
---|
856 | }
|
---|
857 | free(buf);
|
---|
858 | }
|
---|
859 | if (ferror(f) != 0) {
|
---|
860 | /* ferror does NOT set errno! */
|
---|
861 | bb_error_msg_and_die("%s: I/O error", filename);
|
---|
862 | }
|
---|
863 | fclose(f);
|
---|
864 |
|
---|
865 | return defn;
|
---|
866 | }
|
---|
867 |
|
---|
868 | static char *setlocalenv(const char *format, const char *name, const char *value)
|
---|
869 | {
|
---|
870 | char *result;
|
---|
871 | char *here;
|
---|
872 | char *there;
|
---|
873 |
|
---|
874 | result = xasprintf(format, name, value);
|
---|
875 |
|
---|
876 | for (here = there = result; *there != '=' && *there; there++) {
|
---|
877 | if (*there == '-')
|
---|
878 | *there = '_';
|
---|
879 | if (isalpha(*there))
|
---|
880 | *there = toupper(*there);
|
---|
881 |
|
---|
882 | if (isalnum(*there) || *there == '_') {
|
---|
883 | *here = *there;
|
---|
884 | here++;
|
---|
885 | }
|
---|
886 | }
|
---|
887 | memmove(here, there, strlen(there) + 1);
|
---|
888 |
|
---|
889 | return result;
|
---|
890 | }
|
---|
891 |
|
---|
892 | static void set_environ(struct interface_defn_t *iface, const char *mode)
|
---|
893 | {
|
---|
894 | char **environend;
|
---|
895 | int i;
|
---|
896 | const int n_env_entries = iface->n_options + 5;
|
---|
897 | char **ppch;
|
---|
898 |
|
---|
899 | if (my_environ != NULL) {
|
---|
900 | for (ppch = my_environ; *ppch; ppch++) {
|
---|
901 | free(*ppch);
|
---|
902 | *ppch = NULL;
|
---|
903 | }
|
---|
904 | free(my_environ);
|
---|
905 | }
|
---|
906 | my_environ = xzalloc(sizeof(char *) * (n_env_entries + 1 /* for final NULL */ ));
|
---|
907 | environend = my_environ;
|
---|
908 |
|
---|
909 | for (i = 0; i < iface->n_options; i++) {
|
---|
910 | if (strcmp(iface->option[i].name, "up") == 0
|
---|
911 | || strcmp(iface->option[i].name, "down") == 0
|
---|
912 | || strcmp(iface->option[i].name, "pre-up") == 0
|
---|
913 | || strcmp(iface->option[i].name, "post-down") == 0
|
---|
914 | ) {
|
---|
915 | continue;
|
---|
916 | }
|
---|
917 | *(environend++) = setlocalenv("IF_%s=%s", iface->option[i].name, iface->option[i].value);
|
---|
918 | }
|
---|
919 |
|
---|
920 | *(environend++) = setlocalenv("%s=%s", "IFACE", iface->iface);
|
---|
921 | *(environend++) = setlocalenv("%s=%s", "ADDRFAM", iface->address_family->name);
|
---|
922 | *(environend++) = setlocalenv("%s=%s", "METHOD", iface->method->name);
|
---|
923 | *(environend++) = setlocalenv("%s=%s", "MODE", mode);
|
---|
924 | *(environend++) = setlocalenv("%s=%s", "PATH", startup_PATH);
|
---|
925 | }
|
---|
926 |
|
---|
927 | static int doit(char *str)
|
---|
928 | {
|
---|
929 | if (option_mask32 & (OPT_no_act|OPT_verbose)) {
|
---|
930 | puts(str);
|
---|
931 | }
|
---|
932 | if (!(option_mask32 & OPT_no_act)) {
|
---|
933 | pid_t child;
|
---|
934 | int status;
|
---|
935 |
|
---|
936 | fflush(NULL);
|
---|
937 | child = fork();
|
---|
938 | switch (child) {
|
---|
939 | case -1: /* failure */
|
---|
940 | return 0;
|
---|
941 | case 0: /* child */
|
---|
942 | execle(DEFAULT_SHELL, DEFAULT_SHELL, "-c", str, NULL, my_environ);
|
---|
943 | exit(127);
|
---|
944 | }
|
---|
945 | waitpid(child, &status, 0);
|
---|
946 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
|
---|
947 | return 0;
|
---|
948 | }
|
---|
949 | }
|
---|
950 | return 1;
|
---|
951 | }
|
---|
952 |
|
---|
953 | static int execute_all(struct interface_defn_t *ifd, const char *opt)
|
---|
954 | {
|
---|
955 | int i;
|
---|
956 | char *buf;
|
---|
957 | for (i = 0; i < ifd->n_options; i++) {
|
---|
958 | if (strcmp(ifd->option[i].name, opt) == 0) {
|
---|
959 | if (!doit(ifd->option[i].value)) {
|
---|
960 | return 0;
|
---|
961 | }
|
---|
962 | }
|
---|
963 | }
|
---|
964 |
|
---|
965 | buf = xasprintf("run-parts /etc/network/if-%s.d", opt);
|
---|
966 | /* heh, we don't bother free'ing it */
|
---|
967 | return doit(buf);
|
---|
968 | }
|
---|
969 |
|
---|
970 | static int check(char *str)
|
---|
971 | {
|
---|
972 | return str != NULL;
|
---|
973 | }
|
---|
974 |
|
---|
975 | static int iface_up(struct interface_defn_t *iface)
|
---|
976 | {
|
---|
977 | if (!iface->method->up(iface, check)) return -1;
|
---|
978 | set_environ(iface, "start");
|
---|
979 | if (!execute_all(iface, "pre-up")) return 0;
|
---|
980 | if (!iface->method->up(iface, doit)) return 0;
|
---|
981 | if (!execute_all(iface, "up")) return 0;
|
---|
982 | return 1;
|
---|
983 | }
|
---|
984 |
|
---|
985 | static int iface_down(struct interface_defn_t *iface)
|
---|
986 | {
|
---|
987 | if (!iface->method->down(iface,check)) return -1;
|
---|
988 | set_environ(iface, "stop");
|
---|
989 | if (!execute_all(iface, "down")) return 0;
|
---|
990 | if (!iface->method->down(iface, doit)) return 0;
|
---|
991 | if (!execute_all(iface, "post-down")) return 0;
|
---|
992 | return 1;
|
---|
993 | }
|
---|
994 |
|
---|
995 | #if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
---|
996 | static int popen2(FILE **in, FILE **out, char *command, ...)
|
---|
997 | {
|
---|
998 | va_list ap;
|
---|
999 | char *argv[11] = { command };
|
---|
1000 | int argc;
|
---|
1001 | int infd[2], outfd[2];
|
---|
1002 | pid_t pid;
|
---|
1003 |
|
---|
1004 | argc = 1;
|
---|
1005 | va_start(ap, command);
|
---|
1006 | while ((argc < 10) && (argv[argc] = va_arg(ap, char *))) {
|
---|
1007 | argc++;
|
---|
1008 | }
|
---|
1009 | argv[argc] = NULL; /* make sure */
|
---|
1010 | va_end(ap);
|
---|
1011 |
|
---|
1012 | if (pipe(infd) != 0) {
|
---|
1013 | return 0;
|
---|
1014 | }
|
---|
1015 |
|
---|
1016 | if (pipe(outfd) != 0) {
|
---|
1017 | close(infd[0]);
|
---|
1018 | close(infd[1]);
|
---|
1019 | return 0;
|
---|
1020 | }
|
---|
1021 |
|
---|
1022 | fflush(NULL);
|
---|
1023 | switch (pid = fork()) {
|
---|
1024 | case -1: /* failure */
|
---|
1025 | close(infd[0]);
|
---|
1026 | close(infd[1]);
|
---|
1027 | close(outfd[0]);
|
---|
1028 | close(outfd[1]);
|
---|
1029 | return 0;
|
---|
1030 | case 0: /* child */
|
---|
1031 | dup2(infd[0], 0);
|
---|
1032 | dup2(outfd[1], 1);
|
---|
1033 | close(infd[0]);
|
---|
1034 | close(infd[1]);
|
---|
1035 | close(outfd[0]);
|
---|
1036 | close(outfd[1]);
|
---|
1037 | BB_EXECVP(command, argv);
|
---|
1038 | exit(127);
|
---|
1039 | default: /* parent */
|
---|
1040 | *in = fdopen(infd[1], "w");
|
---|
1041 | *out = fdopen(outfd[0], "r");
|
---|
1042 | close(infd[0]);
|
---|
1043 | close(outfd[1]);
|
---|
1044 | return pid;
|
---|
1045 | }
|
---|
1046 | /* unreached */
|
---|
1047 | }
|
---|
1048 |
|
---|
1049 | static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
---|
1050 | {
|
---|
1051 | FILE *in, *out;
|
---|
1052 | int i, status;
|
---|
1053 | pid_t pid;
|
---|
1054 |
|
---|
1055 | char *logical = xstrdup(physical);
|
---|
1056 |
|
---|
1057 | /* Run the mapping script. */
|
---|
1058 | pid = popen2(&in, &out, map->script, physical, NULL);
|
---|
1059 |
|
---|
1060 | /* popen2() returns 0 on failure. */
|
---|
1061 | if (pid == 0)
|
---|
1062 | return logical;
|
---|
1063 |
|
---|
1064 | /* Write mappings to stdin of mapping script. */
|
---|
1065 | for (i = 0; i < map->n_mappings; i++) {
|
---|
1066 | fprintf(in, "%s\n", map->mapping[i]);
|
---|
1067 | }
|
---|
1068 | fclose(in);
|
---|
1069 | waitpid(pid, &status, 0);
|
---|
1070 |
|
---|
1071 | if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
|
---|
1072 | /* If the mapping script exited successfully, try to
|
---|
1073 | * grab a line of output and use that as the name of the
|
---|
1074 | * logical interface. */
|
---|
1075 | char *new_logical = xmalloc(MAX_INTERFACE_LENGTH);
|
---|
1076 |
|
---|
1077 | if (fgets(new_logical, MAX_INTERFACE_LENGTH, out)) {
|
---|
1078 | /* If we are able to read a line of output from the script,
|
---|
1079 | * remove any trailing whitespace and use this value
|
---|
1080 | * as the name of the logical interface. */
|
---|
1081 | char *pch = new_logical + strlen(new_logical) - 1;
|
---|
1082 |
|
---|
1083 | while (pch >= new_logical && isspace(*pch))
|
---|
1084 | *(pch--) = '\0';
|
---|
1085 |
|
---|
1086 | free(logical);
|
---|
1087 | logical = new_logical;
|
---|
1088 | } else {
|
---|
1089 | /* If we are UNABLE to read a line of output, discard our
|
---|
1090 | * freshly allocated memory. */
|
---|
1091 | free(new_logical);
|
---|
1092 | }
|
---|
1093 | }
|
---|
1094 |
|
---|
1095 | fclose(out);
|
---|
1096 |
|
---|
1097 | return logical;
|
---|
1098 | }
|
---|
1099 | #endif /* FEATURE_IFUPDOWN_MAPPING */
|
---|
1100 |
|
---|
1101 | static llist_t *find_iface_state(llist_t *state_list, const char *iface)
|
---|
1102 | {
|
---|
1103 | unsigned short iface_len = strlen(iface);
|
---|
1104 | llist_t *search = state_list;
|
---|
1105 |
|
---|
1106 | while (search) {
|
---|
1107 | if ((strncmp(search->data, iface, iface_len) == 0)
|
---|
1108 | && (search->data[iface_len] == '=')) {
|
---|
1109 | return search;
|
---|
1110 | }
|
---|
1111 | search = search->link;
|
---|
1112 | }
|
---|
1113 | return NULL;
|
---|
1114 | }
|
---|
1115 |
|
---|
1116 | /* read the previous state from the state file */
|
---|
1117 | static llist_t *read_iface_state(void)
|
---|
1118 | {
|
---|
1119 | llist_t *state_list = NULL;
|
---|
1120 | FILE *state_fp = fopen(CONFIG_IFUPDOWN_IFSTATE_PATH, "r");
|
---|
1121 |
|
---|
1122 | if (state_fp) {
|
---|
1123 | char *start, *end_ptr;
|
---|
1124 | while ((start = xmalloc_fgets(state_fp)) != NULL) {
|
---|
1125 | /* We should only need to check for a single character */
|
---|
1126 | end_ptr = start + strcspn(start, " \t\n");
|
---|
1127 | *end_ptr = '\0';
|
---|
1128 | llist_add_to(&state_list, start);
|
---|
1129 | }
|
---|
1130 | fclose(state_fp);
|
---|
1131 | }
|
---|
1132 | return state_list;
|
---|
1133 | }
|
---|
1134 |
|
---|
1135 |
|
---|
1136 | int ifupdown_main(int argc, char **argv);
|
---|
1137 | int ifupdown_main(int argc, char **argv)
|
---|
1138 | {
|
---|
1139 | int (*cmds)(struct interface_defn_t *) = NULL;
|
---|
1140 | struct interfaces_file_t *defn;
|
---|
1141 | llist_t *target_list = NULL;
|
---|
1142 | const char *interfaces = "/etc/network/interfaces";
|
---|
1143 | bool any_failures = 0;
|
---|
1144 |
|
---|
1145 | cmds = iface_down;
|
---|
1146 | if (applet_name[2] == 'u') {
|
---|
1147 | /* ifup command */
|
---|
1148 | cmds = iface_up;
|
---|
1149 | }
|
---|
1150 |
|
---|
1151 | getopt32(argv, OPTION_STR, &interfaces);
|
---|
1152 | if (argc - optind > 0) {
|
---|
1153 | if (DO_ALL) bb_show_usage();
|
---|
1154 | } else {
|
---|
1155 | if (!DO_ALL) bb_show_usage();
|
---|
1156 | }
|
---|
1157 |
|
---|
1158 | debug_noise("reading %s file:\n", interfaces);
|
---|
1159 | defn = read_interfaces(interfaces);
|
---|
1160 | debug_noise("\ndone reading %s\n\n", interfaces);
|
---|
1161 |
|
---|
1162 | if (!defn) {
|
---|
1163 | return EXIT_FAILURE;
|
---|
1164 | }
|
---|
1165 |
|
---|
1166 | startup_PATH = getenv("PATH");
|
---|
1167 | if (!startup_PATH) startup_PATH = "";
|
---|
1168 |
|
---|
1169 | /* Create a list of interfaces to work on */
|
---|
1170 | if (DO_ALL) {
|
---|
1171 | target_list = defn->autointerfaces;
|
---|
1172 | } else {
|
---|
1173 | llist_add_to_end(&target_list, argv[optind]);
|
---|
1174 | }
|
---|
1175 |
|
---|
1176 | /* Update the interfaces */
|
---|
1177 | while (target_list) {
|
---|
1178 | llist_t *iface_list;
|
---|
1179 | struct interface_defn_t *currif;
|
---|
1180 | char *iface;
|
---|
1181 | char *liface;
|
---|
1182 | char *pch;
|
---|
1183 | bool okay = 0;
|
---|
1184 | unsigned cmds_ret;
|
---|
1185 |
|
---|
1186 | iface = xstrdup(target_list->data);
|
---|
1187 | target_list = target_list->link;
|
---|
1188 |
|
---|
1189 | pch = strchr(iface, '=');
|
---|
1190 | if (pch) {
|
---|
1191 | *pch = '\0';
|
---|
1192 | liface = xstrdup(pch + 1);
|
---|
1193 | } else {
|
---|
1194 | liface = xstrdup(iface);
|
---|
1195 | }
|
---|
1196 |
|
---|
1197 | if (!FORCE) {
|
---|
1198 | llist_t *state_list = read_iface_state();
|
---|
1199 | const llist_t *iface_state = find_iface_state(state_list, iface);
|
---|
1200 |
|
---|
1201 | if (cmds == iface_up) {
|
---|
1202 | /* ifup */
|
---|
1203 | if (iface_state) {
|
---|
1204 | bb_error_msg("interface %s already configured", iface);
|
---|
1205 | continue;
|
---|
1206 | }
|
---|
1207 | } else {
|
---|
1208 | /* ifdown */
|
---|
1209 | if (!iface_state) {
|
---|
1210 | bb_error_msg("interface %s not configured", iface);
|
---|
1211 | continue;
|
---|
1212 | }
|
---|
1213 | }
|
---|
1214 | llist_free(state_list, free);
|
---|
1215 | }
|
---|
1216 |
|
---|
1217 | #if ENABLE_FEATURE_IFUPDOWN_MAPPING
|
---|
1218 | if ((cmds == iface_up) && !NO_MAPPINGS) {
|
---|
1219 | struct mapping_defn_t *currmap;
|
---|
1220 |
|
---|
1221 | for (currmap = defn->mappings; currmap; currmap = currmap->next) {
|
---|
1222 | int i;
|
---|
1223 | for (i = 0; i < currmap->n_matches; i++) {
|
---|
1224 | if (fnmatch(currmap->match[i], liface, 0) != 0)
|
---|
1225 | continue;
|
---|
1226 | if (VERBOSE) {
|
---|
1227 | printf("Running mapping script %s on %s\n", currmap->script, liface);
|
---|
1228 | }
|
---|
1229 | liface = run_mapping(iface, currmap);
|
---|
1230 | break;
|
---|
1231 | }
|
---|
1232 | }
|
---|
1233 | }
|
---|
1234 | #endif
|
---|
1235 |
|
---|
1236 | iface_list = defn->ifaces;
|
---|
1237 | while (iface_list) {
|
---|
1238 | currif = (struct interface_defn_t *) iface_list->data;
|
---|
1239 | if (strcmp(liface, currif->iface) == 0) {
|
---|
1240 | char *oldiface = currif->iface;
|
---|
1241 |
|
---|
1242 | okay = 1;
|
---|
1243 | currif->iface = iface;
|
---|
1244 |
|
---|
1245 | debug_noise("\nConfiguring interface %s (%s)\n", liface, currif->address_family->name);
|
---|
1246 |
|
---|
1247 | /* Call the cmds function pointer, does either iface_up() or iface_down() */
|
---|
1248 | cmds_ret = cmds(currif);
|
---|
1249 | if (cmds_ret == -1) {
|
---|
1250 | bb_error_msg("don't seem to have all the variables for %s/%s",
|
---|
1251 | liface, currif->address_family->name);
|
---|
1252 | any_failures = 1;
|
---|
1253 | } else if (cmds_ret == 0) {
|
---|
1254 | any_failures = 1;
|
---|
1255 | }
|
---|
1256 |
|
---|
1257 | currif->iface = oldiface;
|
---|
1258 | }
|
---|
1259 | iface_list = iface_list->link;
|
---|
1260 | }
|
---|
1261 | if (VERBOSE) {
|
---|
1262 | puts("");
|
---|
1263 | }
|
---|
1264 |
|
---|
1265 | if (!okay && !FORCE) {
|
---|
1266 | bb_error_msg("ignoring unknown interface %s", liface);
|
---|
1267 | any_failures = 1;
|
---|
1268 | } else if (!NO_ACT) {
|
---|
1269 | /* update the state file */
|
---|
1270 | FILE *state_fp;
|
---|
1271 | llist_t *state;
|
---|
1272 | llist_t *state_list = read_iface_state();
|
---|
1273 | llist_t *iface_state = find_iface_state(state_list, iface);
|
---|
1274 |
|
---|
1275 | if (cmds == iface_up) {
|
---|
1276 | char * const newiface = xasprintf("%s=%s", iface, liface);
|
---|
1277 | if (iface_state == NULL) {
|
---|
1278 | llist_add_to_end(&state_list, newiface);
|
---|
1279 | } else {
|
---|
1280 | free(iface_state->data);
|
---|
1281 | iface_state->data = newiface;
|
---|
1282 | }
|
---|
1283 | } else {
|
---|
1284 | /* Remove an interface from state_list */
|
---|
1285 | llist_unlink(&state_list, iface_state);
|
---|
1286 | free(llist_pop(&iface_state));
|
---|
1287 | }
|
---|
1288 |
|
---|
1289 | /* Actually write the new state */
|
---|
1290 | state_fp = xfopen(CONFIG_IFUPDOWN_IFSTATE_PATH, "w");
|
---|
1291 | state = state_list;
|
---|
1292 | while (state) {
|
---|
1293 | if (state->data) {
|
---|
1294 | fprintf(state_fp, "%s\n", state->data);
|
---|
1295 | }
|
---|
1296 | state = state->link;
|
---|
1297 | }
|
---|
1298 | fclose(state_fp);
|
---|
1299 | llist_free(state_list, free);
|
---|
1300 | }
|
---|
1301 | }
|
---|
1302 |
|
---|
1303 | return any_failures;
|
---|
1304 | }
|
---|