1 | /* vi: set sw=4 ts=4: */
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2 | /* route
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3 | *
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4 | * Similar to the standard Unix route, but with only the necessary
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5 | * parts for AF_INET and AF_INET6
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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 | * Author of the original route:
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10 | * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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11 | * (derived from FvK's 'route.c 1.70 01/04/94')
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12 | *
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13 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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14 | *
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15 | *
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16 | * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
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17 | * adjustments by Larry Doolittle <LRDoolittle@lbl.gov>
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18 | *
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19 | * IPV6 support added by Bart Visscher <magick@linux-fan.com>
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20 | */
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21 |
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22 | /* 2004/03/09 Manuel Novoa III <mjn3@codepoet.org>
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23 | *
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24 | * Rewritten to fix several bugs, add additional error checking, and
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25 | * remove ridiculous amounts of bloat.
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26 | */
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27 |
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28 | #include <net/route.h>
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29 | #include <net/if.h>
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30 |
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31 | #include "libbb.h"
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32 | #include "inet_common.h"
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33 |
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34 |
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35 | #ifndef RTF_UP
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36 | /* Keep this in sync with /usr/src/linux/include/linux/route.h */
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37 | #define RTF_UP 0x0001 /* route usable */
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38 | #define RTF_GATEWAY 0x0002 /* destination is a gateway */
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39 | #define RTF_HOST 0x0004 /* host entry (net otherwise) */
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40 | #define RTF_REINSTATE 0x0008 /* reinstate route after tmout */
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41 | #define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */
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42 | #define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */
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43 | #define RTF_MTU 0x0040 /* specific MTU for this route */
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44 | #ifndef RTF_MSS
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45 | #define RTF_MSS RTF_MTU /* Compatibility :-( */
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46 | #endif
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47 | #define RTF_WINDOW 0x0080 /* per route window clamping */
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48 | #define RTF_IRTT 0x0100 /* Initial round trip time */
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49 | #define RTF_REJECT 0x0200 /* Reject route */
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50 | #endif
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51 |
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52 | #if defined(SIOCADDRTOLD) || defined(RTF_IRTT) /* route */
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53 | #define HAVE_NEW_ADDRT 1
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54 | #endif
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55 |
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56 | #if HAVE_NEW_ADDRT
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57 | #define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
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58 | #define full_mask(x) (x)
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59 | #else
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60 | #define mask_in_addr(x) ((x).rt_genmask)
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61 | #define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
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62 | #endif
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63 |
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64 | /* The RTACTION entries must agree with tbl_verb[] below! */
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65 | #define RTACTION_ADD 1
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66 | #define RTACTION_DEL 2
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67 |
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68 | /* For the various tbl_*[] arrays, the 1st byte is the offset to
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69 | * the next entry and the 2nd byte is return value. */
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70 |
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71 | #define NET_FLAG 1
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72 | #define HOST_FLAG 2
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73 |
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74 | /* We remap '-' to '#' to avoid problems with getopt. */
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75 | static const char tbl_hash_net_host[] ALIGN1 =
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76 | "\007\001#net\0"
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77 | /* "\010\002#host\0" */
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78 | "\007\002#host" /* Since last, we can save a byte. */
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79 | ;
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80 |
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81 | #define KW_TAKES_ARG 020
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82 | #define KW_SETS_FLAG 040
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83 |
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84 | #define KW_IPVx_METRIC 020
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85 | #define KW_IPVx_NETMASK 021
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86 | #define KW_IPVx_GATEWAY 022
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87 | #define KW_IPVx_MSS 023
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88 | #define KW_IPVx_WINDOW 024
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89 | #define KW_IPVx_IRTT 025
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90 | #define KW_IPVx_DEVICE 026
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91 |
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92 | #define KW_IPVx_FLAG_ONLY 040
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93 | #define KW_IPVx_REJECT 040
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94 | #define KW_IPVx_MOD 041
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95 | #define KW_IPVx_DYN 042
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96 | #define KW_IPVx_REINSTATE 043
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97 |
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98 | static const char tbl_ipvx[] ALIGN1 =
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99 | /* 020 is the "takes an arg" bit */
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100 | #if HAVE_NEW_ADDRT
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101 | "\011\020metric\0"
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102 | #endif
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103 | "\012\021netmask\0"
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104 | "\005\022gw\0"
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105 | "\012\022gateway\0"
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106 | "\006\023mss\0"
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107 | "\011\024window\0"
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108 | #ifdef RTF_IRTT
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109 | "\007\025irtt\0"
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110 | #endif
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111 | "\006\026dev\0"
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112 | "\011\026device\0"
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113 | /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */
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114 | #ifdef RTF_REJECT
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115 | "\011\040reject\0"
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116 | #endif
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117 | "\006\041mod\0"
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118 | "\006\042dyn\0"
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119 | /* "\014\043reinstate\0" */
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120 | "\013\043reinstate" /* Since last, we can save a byte. */
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121 | ;
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122 |
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123 | static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */
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124 | #ifdef RTF_REJECT
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125 | RTF_REJECT,
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126 | #endif
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127 | RTF_MODIFIED,
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128 | RTF_DYNAMIC,
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129 | RTF_REINSTATE
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130 | };
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131 |
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132 | static int kw_lookup(const char *kwtbl, char ***pargs)
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133 | {
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134 | if (**pargs) {
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135 | do {
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136 | if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */
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137 | *pargs += 1;
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138 | if (kwtbl[1] & KW_TAKES_ARG) {
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139 | if (!**pargs) { /* No more args! */
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140 | bb_show_usage();
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141 | }
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142 | *pargs += 1; /* Calling routine will use args[-1]. */
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143 | }
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144 | return kwtbl[1];
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145 | }
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146 | kwtbl += *kwtbl;
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147 | } while (*kwtbl);
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148 | }
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149 | return 0;
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150 | }
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151 |
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152 | /* Add or delete a route, depending on action. */
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153 |
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154 | static NOINLINE void INET_setroute(int action, char **args)
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155 | {
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156 | struct rtentry rt;
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157 | const char *netmask = NULL;
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158 | int skfd, isnet, xflag;
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159 |
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160 | /* Grab the -net or -host options. Remember they were transformed. */
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161 | xflag = kw_lookup(tbl_hash_net_host, &args);
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162 |
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163 | /* If we did grab -net or -host, make sure we still have an arg left. */
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164 | if (*args == NULL) {
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165 | bb_show_usage();
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166 | }
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167 |
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168 | /* Clean out the RTREQ structure. */
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169 | memset(&rt, 0, sizeof(rt));
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170 |
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171 | {
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172 | const char *target = *args++;
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173 | char *prefix;
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174 |
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175 | /* recognize x.x.x.x/mask format. */
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176 | prefix = strchr(target, '/');
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177 | if (prefix) {
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178 | int prefix_len;
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179 |
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180 | prefix_len = xatoul_range(prefix+1, 0, 32);
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181 | mask_in_addr(rt) = htonl( ~(0xffffffffUL >> prefix_len));
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182 | *prefix = '\0';
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183 | #if HAVE_NEW_ADDRT
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184 | rt.rt_genmask.sa_family = AF_INET;
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185 | #endif
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186 | } else {
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187 | /* Default netmask. */
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188 | netmask = "default";
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189 | }
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190 | /* Prefer hostname lookup is -host flag (xflag==1) was given. */
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191 | isnet = INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst,
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192 | (xflag & HOST_FLAG));
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193 | if (isnet < 0) {
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194 | bb_error_msg_and_die("resolving %s", target);
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195 | }
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196 | if (prefix) {
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197 | /* do not destroy prefix for process args */
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198 | *prefix = '/';
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199 | }
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200 | }
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201 |
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202 | if (xflag) { /* Reinit isnet if -net or -host was specified. */
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203 | isnet = (xflag & NET_FLAG);
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204 | }
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205 |
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206 | /* Fill in the other fields. */
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207 | rt.rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
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208 |
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209 | while (*args) {
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210 | int k = kw_lookup(tbl_ipvx, &args);
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211 | const char *args_m1 = args[-1];
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212 |
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213 | if (k & KW_IPVx_FLAG_ONLY) {
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214 | rt.rt_flags |= flags_ipvx[k & 3];
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215 | continue;
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216 | }
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217 |
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218 | #if HAVE_NEW_ADDRT
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219 | if (k == KW_IPVx_METRIC) {
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220 | rt.rt_metric = xatoul(args_m1) + 1;
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221 | continue;
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222 | }
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223 | #endif
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224 |
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225 | if (k == KW_IPVx_NETMASK) {
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226 | struct sockaddr mask;
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227 |
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228 | if (mask_in_addr(rt)) {
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229 | bb_show_usage();
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230 | }
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231 |
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232 | netmask = args_m1;
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233 | isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0);
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234 | if (isnet < 0) {
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235 | bb_error_msg_and_die("resolving %s", netmask);
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236 | }
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237 | rt.rt_genmask = full_mask(mask);
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238 | continue;
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239 | }
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240 |
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241 | if (k == KW_IPVx_GATEWAY) {
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242 | if (rt.rt_flags & RTF_GATEWAY) {
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243 | bb_show_usage();
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244 | }
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245 |
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246 | isnet = INET_resolve(args_m1,
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247 | (struct sockaddr_in *) &rt.rt_gateway, 1);
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248 | rt.rt_flags |= RTF_GATEWAY;
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249 |
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250 | if (isnet) {
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251 | if (isnet < 0) {
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252 | bb_error_msg_and_die("resolving %s", args_m1);
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253 | }
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254 | bb_error_msg_and_die("gateway %s is a NETWORK", args_m1);
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255 | }
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256 | continue;
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257 | }
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258 |
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259 | if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */
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260 | rt.rt_flags |= RTF_MSS;
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261 | rt.rt_mss = xatoul_range(args_m1, 64, 32768);
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262 | continue;
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263 | }
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264 |
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265 | if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */
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266 | rt.rt_flags |= RTF_WINDOW;
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267 | rt.rt_window = xatoul_range(args_m1, 128, INT_MAX);
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268 | continue;
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269 | }
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270 |
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271 | #ifdef RTF_IRTT
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272 | if (k == KW_IPVx_IRTT) {
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273 | rt.rt_flags |= RTF_IRTT;
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274 | rt.rt_irtt = xatoul(args_m1);
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275 | rt.rt_irtt *= (sysconf(_SC_CLK_TCK) / 100); /* FIXME */
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276 | #if 0 /* FIXME: do we need to check anything of this? */
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277 | if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
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278 | bb_error_msg_and_die("bad irtt");
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279 | }
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280 | #endif
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281 | continue;
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282 | }
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283 | #endif
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284 |
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285 | /* Device is special in that it can be the last arg specified
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286 | * and doesn't requre the dev/device keyword in that case. */
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287 | if (!rt.rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
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288 | /* Don't use args_m1 here since args may have changed! */
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289 | rt.rt_dev = args[-1];
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290 | continue;
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291 | }
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292 |
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293 | /* Nothing matched. */
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294 | bb_show_usage();
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295 | }
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296 |
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297 | #ifdef RTF_REJECT
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298 | if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev) {
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299 | rt.rt_dev = (char*)"lo";
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300 | }
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301 | #endif
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302 |
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303 | /* sanity checks.. */
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304 | if (mask_in_addr(rt)) {
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305 | uint32_t mask = mask_in_addr(rt);
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306 |
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307 | mask = ~ntohl(mask);
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308 | if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) {
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309 | bb_error_msg_and_die("netmask %.8x and host route conflict",
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310 | (unsigned int) mask);
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311 | }
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312 | if (mask & (mask + 1)) {
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313 | bb_error_msg_and_die("bogus netmask %s", netmask);
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314 | }
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315 | mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr;
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316 | if (mask & ~(uint32_t)mask_in_addr(rt)) {
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317 | bb_error_msg_and_die("netmask and route address conflict");
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318 | }
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319 | }
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320 |
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321 | /* Fill out netmask if still unset */
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322 | if ((action == RTACTION_ADD) && (rt.rt_flags & RTF_HOST)) {
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323 | mask_in_addr(rt) = 0xffffffff;
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324 | }
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325 |
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326 | /* Create a socket to the INET kernel. */
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327 | skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
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328 |
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329 | if (action == RTACTION_ADD)
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330 | xioctl(skfd, SIOCADDRT, &rt);
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331 | else
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332 | xioctl(skfd, SIOCDELRT, &rt);
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333 |
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334 | if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
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335 | }
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336 |
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337 | #if ENABLE_FEATURE_IPV6
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338 |
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339 | static NOINLINE void INET6_setroute(int action, char **args)
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340 | {
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341 | struct sockaddr_in6 sa6;
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342 | struct in6_rtmsg rt;
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343 | int prefix_len, skfd;
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344 | const char *devname;
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345 |
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346 | /* We know args isn't NULL from the check in route_main. */
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347 | const char *target = *args++;
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348 |
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349 | if (strcmp(target, "default") == 0) {
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350 | prefix_len = 0;
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351 | memset(&sa6, 0, sizeof(sa6));
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352 | } else {
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353 | char *cp;
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354 | cp = strchr(target, '/'); /* Yes... const to non is ok. */
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355 | if (cp) {
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356 | *cp = '\0';
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357 | prefix_len = xatoul_range(cp + 1, 0, 128);
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358 | } else {
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359 | prefix_len = 128;
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360 | }
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361 | if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
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362 | bb_error_msg_and_die("resolving %s", target);
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363 | }
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364 | }
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365 |
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366 | /* Clean out the RTREQ structure. */
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367 | memset(&rt, 0, sizeof(rt));
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368 |
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369 | memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
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370 |
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371 | /* Fill in the other fields. */
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372 | rt.rtmsg_dst_len = prefix_len;
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373 | rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
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374 | rt.rtmsg_metric = 1;
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375 |
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376 | devname = NULL;
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377 |
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378 | while (*args) {
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379 | int k = kw_lookup(tbl_ipvx, &args);
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380 | const char *args_m1 = args[-1];
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381 |
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382 | if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
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383 | rt.rtmsg_flags |= flags_ipvx[k & 3];
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384 | continue;
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385 | }
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386 |
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387 | if (k == KW_IPVx_METRIC) {
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388 | rt.rtmsg_metric = xatoul(args_m1);
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389 | continue;
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390 | }
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391 |
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392 | if (k == KW_IPVx_GATEWAY) {
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393 | if (rt.rtmsg_flags & RTF_GATEWAY) {
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394 | bb_show_usage();
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395 | }
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396 |
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397 | if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
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398 | bb_error_msg_and_die("resolving %s", args_m1);
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399 | }
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400 | memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
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401 | sizeof(struct in6_addr));
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402 | rt.rtmsg_flags |= RTF_GATEWAY;
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403 | continue;
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404 | }
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405 |
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406 | /* Device is special in that it can be the last arg specified
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407 | * and doesn't requre the dev/device keyword in that case. */
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408 | if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
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409 | /* Don't use args_m1 here since args may have changed! */
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410 | devname = args[-1];
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411 | continue;
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412 | }
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413 |
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414 | /* Nothing matched. */
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415 | bb_show_usage();
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416 | }
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417 |
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418 | /* Create a socket to the INET6 kernel. */
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419 | skfd = xsocket(AF_INET6, SOCK_DGRAM, 0);
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420 |
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421 | rt.rtmsg_ifindex = 0;
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422 |
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423 | if (devname) {
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424 | struct ifreq ifr;
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425 | memset(&ifr, 0, sizeof(ifr));
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426 | strncpy_IFNAMSIZ(ifr.ifr_name, devname);
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427 | xioctl(skfd, SIOGIFINDEX, &ifr);
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428 | rt.rtmsg_ifindex = ifr.ifr_ifindex;
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429 | }
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430 |
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431 | /* Tell the kernel to accept this route. */
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432 | if (action == RTACTION_ADD)
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433 | xioctl(skfd, SIOCADDRT, &rt);
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434 | else
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435 | xioctl(skfd, SIOCDELRT, &rt);
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436 |
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437 | if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
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438 | }
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439 | #endif
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440 |
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441 | static const unsigned flagvals[] = { /* Must agree with flagchars[]. */
|
---|
442 | RTF_GATEWAY,
|
---|
443 | RTF_HOST,
|
---|
444 | RTF_REINSTATE,
|
---|
445 | RTF_DYNAMIC,
|
---|
446 | RTF_MODIFIED,
|
---|
447 | #if ENABLE_FEATURE_IPV6
|
---|
448 | RTF_DEFAULT,
|
---|
449 | RTF_ADDRCONF,
|
---|
450 | RTF_CACHE
|
---|
451 | #endif
|
---|
452 | };
|
---|
453 |
|
---|
454 | #define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
|
---|
455 | #define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE)
|
---|
456 |
|
---|
457 | /* Must agree with flagvals[]. */
|
---|
458 | static const char flagchars[] ALIGN1 =
|
---|
459 | "GHRDM"
|
---|
460 | #if ENABLE_FEATURE_IPV6
|
---|
461 | "DAC"
|
---|
462 | #endif
|
---|
463 | ;
|
---|
464 |
|
---|
465 | static void set_flags(char *flagstr, int flags)
|
---|
466 | {
|
---|
467 | int i;
|
---|
468 |
|
---|
469 | *flagstr++ = 'U';
|
---|
470 |
|
---|
471 | for (i = 0; (*flagstr = flagchars[i]) != 0; i++) {
|
---|
472 | if (flags & flagvals[i]) {
|
---|
473 | ++flagstr;
|
---|
474 | }
|
---|
475 | }
|
---|
476 | }
|
---|
477 |
|
---|
478 | /* also used in netstat */
|
---|
479 | void FAST_FUNC bb_displayroutes(int noresolve, int netstatfmt)
|
---|
480 | {
|
---|
481 | char devname[64], flags[16], *sdest, *sgw;
|
---|
482 | unsigned long d, g, m;
|
---|
483 | int flgs, ref, use, metric, mtu, win, ir;
|
---|
484 | struct sockaddr_in s_addr;
|
---|
485 | struct in_addr mask;
|
---|
486 |
|
---|
487 | FILE *fp = xfopen_for_read("/proc/net/route");
|
---|
488 |
|
---|
489 | printf("Kernel IP routing table\n"
|
---|
490 | "Destination Gateway Genmask Flags %s Iface\n",
|
---|
491 | netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
|
---|
492 |
|
---|
493 | if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */
|
---|
494 | goto ERROR; /* Empty or missing line, or read error. */
|
---|
495 | }
|
---|
496 | while (1) {
|
---|
497 | int r;
|
---|
498 | r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
|
---|
499 | devname, &d, &g, &flgs, &ref, &use, &metric, &m,
|
---|
500 | &mtu, &win, &ir);
|
---|
501 | if (r != 11) {
|
---|
502 | if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
|
---|
503 | break;
|
---|
504 | }
|
---|
505 | ERROR:
|
---|
506 | bb_error_msg_and_die("fscanf");
|
---|
507 | }
|
---|
508 |
|
---|
509 | if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
|
---|
510 | continue;
|
---|
511 | }
|
---|
512 |
|
---|
513 | set_flags(flags, (flgs & IPV4_MASK));
|
---|
514 | #ifdef RTF_REJECT
|
---|
515 | if (flgs & RTF_REJECT) {
|
---|
516 | flags[0] = '!';
|
---|
517 | }
|
---|
518 | #endif
|
---|
519 |
|
---|
520 | memset(&s_addr, 0, sizeof(struct sockaddr_in));
|
---|
521 | s_addr.sin_family = AF_INET;
|
---|
522 | s_addr.sin_addr.s_addr = d;
|
---|
523 | sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */
|
---|
524 | s_addr.sin_addr.s_addr = g;
|
---|
525 | sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */
|
---|
526 | mask.s_addr = m;
|
---|
527 | /* "%15.15s" truncates hostnames, do we really want that? */
|
---|
528 | printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
|
---|
529 | free(sdest);
|
---|
530 | free(sgw);
|
---|
531 | if (netstatfmt) {
|
---|
532 | printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
|
---|
533 | } else {
|
---|
534 | printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
|
---|
535 | }
|
---|
536 | }
|
---|
537 | }
|
---|
538 |
|
---|
539 | #if ENABLE_FEATURE_IPV6
|
---|
540 |
|
---|
541 | static void INET6_displayroutes(void)
|
---|
542 | {
|
---|
543 | char addr6[128], *naddr6;
|
---|
544 | /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
|
---|
545 | * We read the non-delimited strings into the tail of the buffer
|
---|
546 | * using fscanf and then modify the buffer by shifting forward
|
---|
547 | * while inserting ':'s and the nul terminator for the first string.
|
---|
548 | * Hence the strings are at addr6x and addr6x+40. This generates
|
---|
549 | * _much_ less code than the previous (upstream) approach. */
|
---|
550 | char addr6x[80];
|
---|
551 | char iface[16], flags[16];
|
---|
552 | int iflags, metric, refcnt, use, prefix_len, slen;
|
---|
553 | struct sockaddr_in6 snaddr6;
|
---|
554 |
|
---|
555 | FILE *fp = xfopen_for_read("/proc/net/ipv6_route");
|
---|
556 |
|
---|
557 | printf("Kernel IPv6 routing table\n%-44s%-40s"
|
---|
558 | "Flags Metric Ref Use Iface\n",
|
---|
559 | "Destination", "Next Hop");
|
---|
560 |
|
---|
561 | while (1) {
|
---|
562 | int r;
|
---|
563 | r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
|
---|
564 | addr6x+14, &prefix_len, &slen, addr6x+40+7,
|
---|
565 | &metric, &use, &refcnt, &iflags, iface);
|
---|
566 | if (r != 9) {
|
---|
567 | if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
|
---|
568 | break;
|
---|
569 | }
|
---|
570 | ERROR:
|
---|
571 | bb_error_msg_and_die("fscanf");
|
---|
572 | }
|
---|
573 |
|
---|
574 | /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
|
---|
575 | * For now, always do this to validate the proc route format, even
|
---|
576 | * if the interface is down. */
|
---|
577 | {
|
---|
578 | int i = 0;
|
---|
579 | char *p = addr6x+14;
|
---|
580 |
|
---|
581 | do {
|
---|
582 | if (!*p) {
|
---|
583 | if (i == 40) { /* nul terminator for 1st address? */
|
---|
584 | addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
|
---|
585 | ++p; /* Skip and continue. */
|
---|
586 | continue;
|
---|
587 | }
|
---|
588 | goto ERROR;
|
---|
589 | }
|
---|
590 | addr6x[i++] = *p++;
|
---|
591 | if (!((i+1) % 5)) {
|
---|
592 | addr6x[i++] = ':';
|
---|
593 | }
|
---|
594 | } while (i < 40+28+7);
|
---|
595 | }
|
---|
596 |
|
---|
597 | if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */
|
---|
598 | continue;
|
---|
599 | }
|
---|
600 |
|
---|
601 | set_flags(flags, (iflags & IPV6_MASK));
|
---|
602 |
|
---|
603 | r = 0;
|
---|
604 | do {
|
---|
605 | inet_pton(AF_INET6, addr6x + r,
|
---|
606 | (struct sockaddr *) &snaddr6.sin6_addr);
|
---|
607 | snaddr6.sin6_family = AF_INET6;
|
---|
608 | naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6,
|
---|
609 | 0x0fff /* Apparently, upstream never resolves. */
|
---|
610 | );
|
---|
611 |
|
---|
612 | if (!r) { /* 1st pass */
|
---|
613 | snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
|
---|
614 | r += 40;
|
---|
615 | free(naddr6);
|
---|
616 | } else { /* 2nd pass */
|
---|
617 | /* Print the info. */
|
---|
618 | printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
|
---|
619 | addr6, naddr6, flags, metric, refcnt, use, iface);
|
---|
620 | free(naddr6);
|
---|
621 | break;
|
---|
622 | }
|
---|
623 | } while (1);
|
---|
624 | }
|
---|
625 | }
|
---|
626 |
|
---|
627 | #endif
|
---|
628 |
|
---|
629 | #define ROUTE_OPT_A 0x01
|
---|
630 | #define ROUTE_OPT_n 0x02
|
---|
631 | #define ROUTE_OPT_e 0x04
|
---|
632 | #define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */
|
---|
633 |
|
---|
634 | /* 1st byte is offset to next entry offset. 2nd byte is return value. */
|
---|
635 | /* 2nd byte matches RTACTION_* code */
|
---|
636 | static const char tbl_verb[] ALIGN1 =
|
---|
637 | "\006\001add\0"
|
---|
638 | "\006\002del\0"
|
---|
639 | /* "\011\002delete\0" */
|
---|
640 | "\010\002delete" /* Since it's last, we can save a byte. */
|
---|
641 | ;
|
---|
642 |
|
---|
643 | int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
644 | int route_main(int argc UNUSED_PARAM, char **argv)
|
---|
645 | {
|
---|
646 | unsigned opt;
|
---|
647 | int what;
|
---|
648 | char *family;
|
---|
649 | char **p;
|
---|
650 |
|
---|
651 | /* First, remap '-net' and '-host' to avoid getopt problems. */
|
---|
652 | p = argv;
|
---|
653 | while (*++p) {
|
---|
654 | if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) {
|
---|
655 | p[0][0] = '#';
|
---|
656 | }
|
---|
657 | }
|
---|
658 |
|
---|
659 | opt = getopt32(argv, "A:ne", &family);
|
---|
660 |
|
---|
661 | if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) {
|
---|
662 | #if ENABLE_FEATURE_IPV6
|
---|
663 | if (strcmp(family, "inet6") == 0) {
|
---|
664 | opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
|
---|
665 | } else
|
---|
666 | #endif
|
---|
667 | bb_show_usage();
|
---|
668 | }
|
---|
669 |
|
---|
670 | argv += optind;
|
---|
671 |
|
---|
672 | /* No more args means display the routing table. */
|
---|
673 | if (!*argv) {
|
---|
674 | int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
|
---|
675 | #if ENABLE_FEATURE_IPV6
|
---|
676 | if (opt & ROUTE_OPT_INET6)
|
---|
677 | INET6_displayroutes();
|
---|
678 | else
|
---|
679 | #endif
|
---|
680 | bb_displayroutes(noresolve, opt & ROUTE_OPT_e);
|
---|
681 |
|
---|
682 | fflush_stdout_and_exit(EXIT_SUCCESS);
|
---|
683 | }
|
---|
684 |
|
---|
685 | /* Check verb. At the moment, must be add, del, or delete. */
|
---|
686 | what = kw_lookup(tbl_verb, &argv);
|
---|
687 | if (!what || !*argv) { /* Unknown verb or no more args. */
|
---|
688 | bb_show_usage();
|
---|
689 | }
|
---|
690 |
|
---|
691 | #if ENABLE_FEATURE_IPV6
|
---|
692 | if (opt & ROUTE_OPT_INET6)
|
---|
693 | INET6_setroute(what, argv);
|
---|
694 | else
|
---|
695 | #endif
|
---|
696 | INET_setroute(what, argv);
|
---|
697 |
|
---|
698 | return EXIT_SUCCESS;
|
---|
699 | }
|
---|