1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * iproute.c "ip route".
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4 | *
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5 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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6 | *
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7 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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8 | *
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9 | *
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10 | * Changes:
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11 | *
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12 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
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13 | * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized
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14 | */
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15 |
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16 | #include "libbb.h"
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17 |
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18 | #include <sys/socket.h>
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19 |
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20 | #include <string.h>
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21 | #include <fcntl.h>
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22 | #include <unistd.h>
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23 |
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24 | #include "rt_names.h"
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25 | #include "utils.h"
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26 | #include "ip_common.h"
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27 |
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28 | #ifndef RTAX_RTTVAR
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29 | #define RTAX_RTTVAR RTAX_HOPS
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30 | #endif
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31 |
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32 |
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33 | static struct
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34 | {
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35 | int tb;
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36 | int flushed;
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37 | char *flushb;
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38 | int flushp;
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39 | int flushe;
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40 | struct rtnl_handle *rth;
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41 | int protocol, protocolmask;
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42 | int scope, scopemask;
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43 | int type, typemask;
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44 | int tos, tosmask;
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45 | int iif, iifmask;
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46 | int oif, oifmask;
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47 | int realm, realmmask;
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48 | inet_prefix rprefsrc;
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49 | inet_prefix rvia;
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50 | inet_prefix rdst;
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51 | inet_prefix mdst;
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52 | inet_prefix rsrc;
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53 | inet_prefix msrc;
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54 | } filter;
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55 |
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56 | static int flush_update(void)
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57 | {
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58 | if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
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59 | perror("Failed to send flush request\n");
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60 | return -1;
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61 | }
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62 | filter.flushp = 0;
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63 | return 0;
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64 | }
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65 |
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66 | static int print_route(struct sockaddr_nl *who ATTRIBUTE_UNUSED,
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67 | struct nlmsghdr *n, void *arg)
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68 | {
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69 | FILE *fp = (FILE*)arg;
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70 | struct rtmsg *r = NLMSG_DATA(n);
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71 | int len = n->nlmsg_len;
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72 | struct rtattr * tb[RTA_MAX+1];
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73 | char abuf[256];
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74 | inet_prefix dst;
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75 | inet_prefix src;
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76 | int host_len = -1;
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77 | SPRINT_BUF(b1);
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78 |
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79 |
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80 | if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
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81 | fprintf(stderr, "Not a route: %08x %08x %08x\n",
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82 | n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
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83 | return 0;
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84 | }
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85 | if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
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86 | return 0;
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87 | len -= NLMSG_LENGTH(sizeof(*r));
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88 | if (len < 0) {
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89 | bb_error_msg("wrong nlmsg len %d", len);
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90 | return -1;
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91 | }
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92 |
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93 | if (r->rtm_family == AF_INET6)
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94 | host_len = 128;
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95 | else if (r->rtm_family == AF_INET)
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96 | host_len = 32;
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97 |
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98 | if (r->rtm_family == AF_INET6) {
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99 | if (filter.tb) {
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100 | if (filter.tb < 0) {
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101 | if (!(r->rtm_flags&RTM_F_CLONED)) {
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102 | return 0;
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103 | }
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104 | } else {
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105 | if (r->rtm_flags&RTM_F_CLONED) {
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106 | return 0;
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107 | }
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108 | if (filter.tb == RT_TABLE_LOCAL) {
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109 | if (r->rtm_type != RTN_LOCAL) {
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110 | return 0;
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111 | }
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112 | } else if (filter.tb == RT_TABLE_MAIN) {
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113 | if (r->rtm_type == RTN_LOCAL) {
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114 | return 0;
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115 | }
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116 | } else {
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117 | return 0;
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118 | }
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119 | }
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120 | }
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121 | } else {
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122 | if (filter.tb > 0 && filter.tb != r->rtm_table) {
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123 | return 0;
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124 | }
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125 | }
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126 | if (filter.rdst.family &&
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127 | (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) {
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128 | return 0;
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129 | }
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130 | if (filter.mdst.family &&
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131 | (r->rtm_family != filter.mdst.family ||
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132 | (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) {
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133 | return 0;
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134 | }
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135 | if (filter.rsrc.family &&
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136 | (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) {
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137 | return 0;
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138 | }
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139 | if (filter.msrc.family &&
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140 | (r->rtm_family != filter.msrc.family ||
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141 | (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) {
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142 | return 0;
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143 | }
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144 |
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145 | memset(tb, 0, sizeof(tb));
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146 | parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
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147 |
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148 | if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
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149 | return 0;
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150 | if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
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151 | inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
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152 | return 0;
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153 |
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154 | if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
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155 | return 0;
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156 | if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
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157 | inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
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158 | return 0;
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159 |
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160 | if (filter.flushb &&
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161 | r->rtm_family == AF_INET6 &&
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162 | r->rtm_dst_len == 0 &&
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163 | r->rtm_type == RTN_UNREACHABLE &&
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164 | tb[RTA_PRIORITY] &&
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165 | *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
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166 | return 0;
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167 |
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168 | if (filter.flushb) {
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169 | struct nlmsghdr *fn;
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170 | if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
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171 | if (flush_update())
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172 | return -1;
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173 | }
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174 | fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
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175 | memcpy(fn, n, n->nlmsg_len);
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176 | fn->nlmsg_type = RTM_DELROUTE;
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177 | fn->nlmsg_flags = NLM_F_REQUEST;
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178 | fn->nlmsg_seq = ++filter.rth->seq;
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179 | filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
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180 | filter.flushed++;
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181 | return 0;
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182 | }
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183 |
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184 | if (n->nlmsg_type == RTM_DELROUTE) {
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185 | fprintf(fp, "Deleted ");
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186 | }
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187 | if (r->rtm_type != RTN_UNICAST && !filter.type) {
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188 | fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
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189 | }
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190 |
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191 | if (tb[RTA_DST]) {
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192 | if (r->rtm_dst_len != host_len) {
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193 | fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
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194 | RTA_PAYLOAD(tb[RTA_DST]),
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195 | RTA_DATA(tb[RTA_DST]),
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196 | abuf, sizeof(abuf)),
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197 | r->rtm_dst_len
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198 | );
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199 | } else {
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200 | fprintf(fp, "%s ", format_host(r->rtm_family,
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201 | RTA_PAYLOAD(tb[RTA_DST]),
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202 | RTA_DATA(tb[RTA_DST]),
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203 | abuf, sizeof(abuf))
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204 | );
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205 | }
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206 | } else if (r->rtm_dst_len) {
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207 | fprintf(fp, "0/%d ", r->rtm_dst_len);
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208 | } else {
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209 | fprintf(fp, "default ");
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210 | }
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211 | if (tb[RTA_SRC]) {
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212 | if (r->rtm_src_len != host_len) {
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213 | fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
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214 | RTA_PAYLOAD(tb[RTA_SRC]),
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215 | RTA_DATA(tb[RTA_SRC]),
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216 | abuf, sizeof(abuf)),
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217 | r->rtm_src_len
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218 | );
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219 | } else {
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220 | fprintf(fp, "from %s ", format_host(r->rtm_family,
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221 | RTA_PAYLOAD(tb[RTA_SRC]),
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222 | RTA_DATA(tb[RTA_SRC]),
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223 | abuf, sizeof(abuf))
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224 | );
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225 | }
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226 | } else if (r->rtm_src_len) {
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227 | fprintf(fp, "from 0/%u ", r->rtm_src_len);
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228 | }
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229 | if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
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230 | fprintf(fp, "via %s ",
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231 | format_host(r->rtm_family,
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232 | RTA_PAYLOAD(tb[RTA_GATEWAY]),
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233 | RTA_DATA(tb[RTA_GATEWAY]),
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234 | abuf, sizeof(abuf)));
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235 | }
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236 | if (tb[RTA_OIF] && filter.oifmask != -1) {
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237 | fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
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238 | }
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239 |
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240 | if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
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241 | /* Do not use format_host(). It is our local addr
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242 | and symbolic name will not be useful.
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243 | */
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244 | fprintf(fp, " src %s ",
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245 | rt_addr_n2a(r->rtm_family,
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246 | RTA_PAYLOAD(tb[RTA_PREFSRC]),
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247 | RTA_DATA(tb[RTA_PREFSRC]),
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248 | abuf, sizeof(abuf)));
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249 | }
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250 | if (tb[RTA_PRIORITY]) {
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251 | fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY]));
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252 | }
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253 | if (r->rtm_family == AF_INET6) {
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254 | struct rta_cacheinfo *ci = NULL;
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255 | if (tb[RTA_CACHEINFO]) {
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256 | ci = RTA_DATA(tb[RTA_CACHEINFO]);
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257 | }
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258 | if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
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259 | static int hz;
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260 | if (!hz) {
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261 | hz = get_hz();
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262 | }
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263 | if (r->rtm_flags & RTM_F_CLONED) {
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264 | fprintf(fp, "%s cache ", _SL_);
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265 | }
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266 | if (ci->rta_expires) {
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267 | fprintf(fp, " expires %dsec", ci->rta_expires/hz);
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268 | }
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269 | if (ci->rta_error != 0) {
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270 | fprintf(fp, " error %d", ci->rta_error);
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271 | }
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272 | } else if (ci) {
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273 | if (ci->rta_error != 0)
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274 | fprintf(fp, " error %d", ci->rta_error);
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275 | }
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276 | }
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277 | if (tb[RTA_IIF] && filter.iifmask != -1) {
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278 | fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
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279 | }
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280 | fprintf(fp, "\n");
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281 | fflush(fp);
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282 | return 0;
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283 | }
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284 |
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285 | static int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
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286 | {
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287 | struct rtnl_handle rth;
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288 | struct {
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289 | struct nlmsghdr n;
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290 | struct rtmsg r;
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291 | char buf[1024];
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292 | } req;
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293 | char mxbuf[256];
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294 | struct rtattr * mxrta = (void*)mxbuf;
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295 | unsigned mxlock = 0;
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296 | char *d = NULL;
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297 | int gw_ok = 0;
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298 | int dst_ok = 0;
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299 | int proto_ok = 0;
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300 | int type_ok = 0;
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301 |
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302 | memset(&req, 0, sizeof(req));
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303 |
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304 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
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305 | req.n.nlmsg_flags = NLM_F_REQUEST|flags;
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306 | req.n.nlmsg_type = cmd;
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307 | req.r.rtm_family = preferred_family;
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308 | req.r.rtm_table = RT_TABLE_MAIN;
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309 | req.r.rtm_scope = RT_SCOPE_NOWHERE;
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310 |
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311 | if (cmd != RTM_DELROUTE) {
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312 | req.r.rtm_protocol = RTPROT_BOOT;
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313 | req.r.rtm_scope = RT_SCOPE_UNIVERSE;
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314 | req.r.rtm_type = RTN_UNICAST;
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315 | }
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316 |
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317 | mxrta->rta_type = RTA_METRICS;
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318 | mxrta->rta_len = RTA_LENGTH(0);
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319 |
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320 | while (argc > 0) {
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321 | if (strcmp(*argv, "src") == 0) {
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322 | inet_prefix addr;
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323 | NEXT_ARG();
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324 | get_addr(&addr, *argv, req.r.rtm_family);
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325 | if (req.r.rtm_family == AF_UNSPEC) {
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326 | req.r.rtm_family = addr.family;
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327 | }
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328 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
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329 | } else if (strcmp(*argv, "via") == 0) {
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330 | inet_prefix addr;
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331 | gw_ok = 1;
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332 | NEXT_ARG();
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333 | get_addr(&addr, *argv, req.r.rtm_family);
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334 | if (req.r.rtm_family == AF_UNSPEC) {
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335 | req.r.rtm_family = addr.family;
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336 | }
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337 | addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
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338 | } else if (strcmp(*argv, "mtu") == 0) {
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339 | unsigned mtu;
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340 | NEXT_ARG();
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341 | if (strcmp(*argv, "lock") == 0) {
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342 | mxlock |= (1<<RTAX_MTU);
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343 | NEXT_ARG();
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344 | }
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345 | if (get_unsigned(&mtu, *argv, 0)) {
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346 | invarg(*argv, "mtu");
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347 | }
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348 | rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
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349 | } else if (matches(*argv, "protocol") == 0) {
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350 | uint32_t prot;
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351 | NEXT_ARG();
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352 | if (rtnl_rtprot_a2n(&prot, *argv))
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353 | invarg(*argv, "protocol");
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354 | req.r.rtm_protocol = prot;
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355 | proto_ok =1;
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356 | } else if (strcmp(*argv, "dev") == 0 ||
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357 | strcmp(*argv, "oif") == 0) {
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358 | NEXT_ARG();
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359 | d = *argv;
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360 | } else {
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361 | int type;
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362 | inet_prefix dst;
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363 |
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364 | if (strcmp(*argv, "to") == 0) {
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365 | NEXT_ARG();
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366 | }
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367 | if ((**argv < '0' || **argv > '9') &&
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368 | rtnl_rtntype_a2n(&type, *argv) == 0) {
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369 | NEXT_ARG();
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370 | req.r.rtm_type = type;
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371 | type_ok = 1;
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372 | }
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373 |
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374 | if (dst_ok) {
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375 | duparg2("to", *argv);
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376 | }
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377 | get_prefix(&dst, *argv, req.r.rtm_family);
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378 | if (req.r.rtm_family == AF_UNSPEC) {
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379 | req.r.rtm_family = dst.family;
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380 | }
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381 | req.r.rtm_dst_len = dst.bitlen;
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382 | dst_ok = 1;
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383 | if (dst.bytelen) {
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384 | addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
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385 | }
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386 | }
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387 | argc--; argv++;
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388 | }
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389 |
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390 | if (rtnl_open(&rth, 0) < 0) {
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391 | exit(1);
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392 | }
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393 |
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394 | if (d) {
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395 | int idx;
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396 |
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397 | ll_init_map(&rth);
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398 |
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399 | if (d) {
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400 | if ((idx = ll_name_to_index(d)) == 0) {
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401 | bb_error_msg("Cannot find device \"%s\"", d);
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402 | return -1;
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403 | }
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404 | addattr32(&req.n, sizeof(req), RTA_OIF, idx);
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405 | }
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406 | }
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407 |
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408 | if (mxrta->rta_len > RTA_LENGTH(0)) {
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409 | if (mxlock) {
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410 | rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
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411 | }
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412 | addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
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413 | }
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414 |
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415 | if (req.r.rtm_family == AF_UNSPEC) {
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416 | req.r.rtm_family = AF_INET;
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417 | }
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418 |
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419 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) {
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420 | exit(2);
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421 | }
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422 |
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423 | return 0;
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424 | }
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425 |
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426 | static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
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427 | {
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428 | struct {
|
---|
429 | struct nlmsghdr nlh;
|
---|
430 | struct rtmsg rtm;
|
---|
431 | } req;
|
---|
432 | struct sockaddr_nl nladdr;
|
---|
433 |
|
---|
434 | memset(&nladdr, 0, sizeof(nladdr));
|
---|
435 | memset(&req, 0, sizeof(req));
|
---|
436 | nladdr.nl_family = AF_NETLINK;
|
---|
437 |
|
---|
438 | req.nlh.nlmsg_len = sizeof(req);
|
---|
439 | req.nlh.nlmsg_type = RTM_GETROUTE;
|
---|
440 | req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
|
---|
441 | req.nlh.nlmsg_pid = 0;
|
---|
442 | req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
|
---|
443 | req.rtm.rtm_family = family;
|
---|
444 | req.rtm.rtm_flags |= RTM_F_CLONED;
|
---|
445 |
|
---|
446 | return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
|
---|
447 | }
|
---|
448 |
|
---|
449 | static int iproute_flush_cache(void)
|
---|
450 | {
|
---|
451 | #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
|
---|
452 |
|
---|
453 | int len;
|
---|
454 | int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
|
---|
455 | char *buffer = "-1";
|
---|
456 |
|
---|
457 | if (flush_fd < 0) {
|
---|
458 | fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
|
---|
459 | return -1;
|
---|
460 | }
|
---|
461 |
|
---|
462 | len = strlen (buffer);
|
---|
463 |
|
---|
464 | if ((write (flush_fd, (void *)buffer, len)) < len) {
|
---|
465 | fprintf (stderr, "Cannot flush routing cache\n");
|
---|
466 | return -1;
|
---|
467 | }
|
---|
468 | close(flush_fd);
|
---|
469 | return 0;
|
---|
470 | }
|
---|
471 |
|
---|
472 | static void iproute_reset_filter(void)
|
---|
473 | {
|
---|
474 | memset(&filter, 0, sizeof(filter));
|
---|
475 | filter.mdst.bitlen = -1;
|
---|
476 | filter.msrc.bitlen = -1;
|
---|
477 | }
|
---|
478 |
|
---|
479 | static int iproute_list_or_flush(int argc, char **argv, int flush)
|
---|
480 | {
|
---|
481 | int do_ipv6 = preferred_family;
|
---|
482 | struct rtnl_handle rth;
|
---|
483 | char *id = NULL;
|
---|
484 | char *od = NULL;
|
---|
485 |
|
---|
486 | iproute_reset_filter();
|
---|
487 | filter.tb = RT_TABLE_MAIN;
|
---|
488 |
|
---|
489 | if (flush && argc <= 0) {
|
---|
490 | bb_error_msg(bb_msg_requires_arg, "\"ip route flush\"");
|
---|
491 | return -1;
|
---|
492 | }
|
---|
493 |
|
---|
494 | while (argc > 0) {
|
---|
495 | if (matches(*argv, "protocol") == 0) {
|
---|
496 | uint32_t prot = 0;
|
---|
497 | NEXT_ARG();
|
---|
498 | filter.protocolmask = -1;
|
---|
499 | if (rtnl_rtprot_a2n(&prot, *argv)) {
|
---|
500 | if (strcmp(*argv, "all") != 0) {
|
---|
501 | invarg(*argv, "protocol");
|
---|
502 | }
|
---|
503 | prot = 0;
|
---|
504 | filter.protocolmask = 0;
|
---|
505 | }
|
---|
506 | filter.protocol = prot;
|
---|
507 | } else if (strcmp(*argv, "dev") == 0 ||
|
---|
508 | strcmp(*argv, "oif") == 0) {
|
---|
509 | NEXT_ARG();
|
---|
510 | od = *argv;
|
---|
511 | } else if (strcmp(*argv, "iif") == 0) {
|
---|
512 | NEXT_ARG();
|
---|
513 | id = *argv;
|
---|
514 | } else if (matches(*argv, "from") == 0) {
|
---|
515 | NEXT_ARG();
|
---|
516 | if (matches(*argv, "root") == 0) {
|
---|
517 | NEXT_ARG();
|
---|
518 | get_prefix(&filter.rsrc, *argv, do_ipv6);
|
---|
519 | } else if (matches(*argv, "match") == 0) {
|
---|
520 | NEXT_ARG();
|
---|
521 | get_prefix(&filter.msrc, *argv, do_ipv6);
|
---|
522 | } else {
|
---|
523 | if (matches(*argv, "exact") == 0) {
|
---|
524 | NEXT_ARG();
|
---|
525 | }
|
---|
526 | get_prefix(&filter.msrc, *argv, do_ipv6);
|
---|
527 | filter.rsrc = filter.msrc;
|
---|
528 | }
|
---|
529 | } else {
|
---|
530 | if (matches(*argv, "to") == 0) {
|
---|
531 | NEXT_ARG();
|
---|
532 | }
|
---|
533 | if (matches(*argv, "root") == 0) {
|
---|
534 | NEXT_ARG();
|
---|
535 | get_prefix(&filter.rdst, *argv, do_ipv6);
|
---|
536 | } else if (matches(*argv, "match") == 0) {
|
---|
537 | NEXT_ARG();
|
---|
538 | get_prefix(&filter.mdst, *argv, do_ipv6);
|
---|
539 | } else if (matches(*argv, "table") == 0) {
|
---|
540 | NEXT_ARG();
|
---|
541 | if (matches(*argv, "cache") == 0) {
|
---|
542 | filter.tb = -1;
|
---|
543 | } else if (matches(*argv, "main") != 0) {
|
---|
544 | invarg(*argv, "table");
|
---|
545 | }
|
---|
546 | } else if (matches(*argv, "cache") == 0) {
|
---|
547 | filter.tb = -1;
|
---|
548 | } else {
|
---|
549 | if (matches(*argv, "exact") == 0) {
|
---|
550 | NEXT_ARG();
|
---|
551 | }
|
---|
552 | get_prefix(&filter.mdst, *argv, do_ipv6);
|
---|
553 | filter.rdst = filter.mdst;
|
---|
554 | }
|
---|
555 | }
|
---|
556 | argc--; argv++;
|
---|
557 | }
|
---|
558 |
|
---|
559 | if (do_ipv6 == AF_UNSPEC && filter.tb) {
|
---|
560 | do_ipv6 = AF_INET;
|
---|
561 | }
|
---|
562 |
|
---|
563 | if (rtnl_open(&rth, 0) < 0) {
|
---|
564 | exit(1);
|
---|
565 | }
|
---|
566 |
|
---|
567 | ll_init_map(&rth);
|
---|
568 |
|
---|
569 | if (id || od) {
|
---|
570 | int idx;
|
---|
571 |
|
---|
572 | if (id) {
|
---|
573 | if ((idx = ll_name_to_index(id)) == 0) {
|
---|
574 | bb_error_msg("Cannot find device \"%s\"", id);
|
---|
575 | return -1;
|
---|
576 | }
|
---|
577 | filter.iif = idx;
|
---|
578 | filter.iifmask = -1;
|
---|
579 | }
|
---|
580 | if (od) {
|
---|
581 | if ((idx = ll_name_to_index(od)) == 0) {
|
---|
582 | bb_error_msg("Cannot find device \"%s\"", od);
|
---|
583 | }
|
---|
584 | filter.oif = idx;
|
---|
585 | filter.oifmask = -1;
|
---|
586 | }
|
---|
587 | }
|
---|
588 |
|
---|
589 | if (flush) {
|
---|
590 | char flushb[4096-512];
|
---|
591 |
|
---|
592 | if (filter.tb == -1) {
|
---|
593 | if (do_ipv6 != AF_INET6)
|
---|
594 | iproute_flush_cache();
|
---|
595 | if (do_ipv6 == AF_INET)
|
---|
596 | return 0;
|
---|
597 | }
|
---|
598 |
|
---|
599 | filter.flushb = flushb;
|
---|
600 | filter.flushp = 0;
|
---|
601 | filter.flushe = sizeof(flushb);
|
---|
602 | filter.rth = &rth;
|
---|
603 |
|
---|
604 | for (;;) {
|
---|
605 | if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
|
---|
606 | perror("Cannot send dump request");
|
---|
607 | return -1;
|
---|
608 | }
|
---|
609 | filter.flushed = 0;
|
---|
610 | if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
|
---|
611 | bb_error_msg("Flush terminated\n");
|
---|
612 | return -1;
|
---|
613 | }
|
---|
614 | if (filter.flushed == 0) {
|
---|
615 | fflush(stdout);
|
---|
616 | return 0;
|
---|
617 | }
|
---|
618 | if (flush_update() < 0)
|
---|
619 | exit(1);
|
---|
620 | }
|
---|
621 | }
|
---|
622 |
|
---|
623 | if (filter.tb != -1) {
|
---|
624 | if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
|
---|
625 | bb_perror_msg_and_die("Cannot send dump request");
|
---|
626 | }
|
---|
627 | } else {
|
---|
628 | if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
|
---|
629 | bb_perror_msg_and_die("Cannot send dump request");
|
---|
630 | }
|
---|
631 | }
|
---|
632 |
|
---|
633 | if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
|
---|
634 | bb_error_msg_and_die("Dump terminated");
|
---|
635 | }
|
---|
636 |
|
---|
637 | exit(0);
|
---|
638 | }
|
---|
639 |
|
---|
640 |
|
---|
641 | static int iproute_get(int argc, char **argv)
|
---|
642 | {
|
---|
643 | struct rtnl_handle rth;
|
---|
644 | struct {
|
---|
645 | struct nlmsghdr n;
|
---|
646 | struct rtmsg r;
|
---|
647 | char buf[1024];
|
---|
648 | } req;
|
---|
649 | char *idev = NULL;
|
---|
650 | char *odev = NULL;
|
---|
651 | int connected = 0;
|
---|
652 | int from_ok = 0;
|
---|
653 | static const char * const options[] =
|
---|
654 | { "from", "iif", "oif", "dev", "notify", "connected", "to", 0 };
|
---|
655 |
|
---|
656 | memset(&req, 0, sizeof(req));
|
---|
657 |
|
---|
658 | iproute_reset_filter();
|
---|
659 |
|
---|
660 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
|
---|
661 | req.n.nlmsg_flags = NLM_F_REQUEST;
|
---|
662 | req.n.nlmsg_type = RTM_GETROUTE;
|
---|
663 | req.r.rtm_family = preferred_family;
|
---|
664 | req.r.rtm_table = 0;
|
---|
665 | req.r.rtm_protocol = 0;
|
---|
666 | req.r.rtm_scope = 0;
|
---|
667 | req.r.rtm_type = 0;
|
---|
668 | req.r.rtm_src_len = 0;
|
---|
669 | req.r.rtm_dst_len = 0;
|
---|
670 | req.r.rtm_tos = 0;
|
---|
671 |
|
---|
672 | while (argc > 0) {
|
---|
673 | switch (compare_string_array(options, *argv)) {
|
---|
674 | case 0: /* from */
|
---|
675 | {
|
---|
676 | inet_prefix addr;
|
---|
677 | NEXT_ARG();
|
---|
678 | from_ok = 1;
|
---|
679 | get_prefix(&addr, *argv, req.r.rtm_family);
|
---|
680 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
681 | req.r.rtm_family = addr.family;
|
---|
682 | }
|
---|
683 | if (addr.bytelen) {
|
---|
684 | addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
|
---|
685 | }
|
---|
686 | req.r.rtm_src_len = addr.bitlen;
|
---|
687 | break;
|
---|
688 | }
|
---|
689 | case 1: /* iif */
|
---|
690 | NEXT_ARG();
|
---|
691 | idev = *argv;
|
---|
692 | break;
|
---|
693 | case 2: /* oif */
|
---|
694 | case 3: /* dev */
|
---|
695 | NEXT_ARG();
|
---|
696 | odev = *argv;
|
---|
697 | break;
|
---|
698 | case 4: /* notify */
|
---|
699 | req.r.rtm_flags |= RTM_F_NOTIFY;
|
---|
700 | break;
|
---|
701 | case 5: /* connected */
|
---|
702 | connected = 1;
|
---|
703 | break;
|
---|
704 | case 6: /* to */
|
---|
705 | NEXT_ARG();
|
---|
706 | default:
|
---|
707 | {
|
---|
708 | inet_prefix addr;
|
---|
709 | get_prefix(&addr, *argv, req.r.rtm_family);
|
---|
710 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
711 | req.r.rtm_family = addr.family;
|
---|
712 | }
|
---|
713 | if (addr.bytelen) {
|
---|
714 | addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
|
---|
715 | }
|
---|
716 | req.r.rtm_dst_len = addr.bitlen;
|
---|
717 | }
|
---|
718 | argc--; argv++;
|
---|
719 | }
|
---|
720 | }
|
---|
721 |
|
---|
722 | if (req.r.rtm_dst_len == 0) {
|
---|
723 | bb_error_msg_and_die("need at least destination address");
|
---|
724 | }
|
---|
725 |
|
---|
726 | if (rtnl_open(&rth, 0) < 0)
|
---|
727 | exit(1);
|
---|
728 |
|
---|
729 | ll_init_map(&rth);
|
---|
730 |
|
---|
731 | if (idev || odev) {
|
---|
732 | int idx;
|
---|
733 |
|
---|
734 | if (idev) {
|
---|
735 | if ((idx = ll_name_to_index(idev)) == 0) {
|
---|
736 | bb_error_msg("Cannot find device \"%s\"", idev);
|
---|
737 | return -1;
|
---|
738 | }
|
---|
739 | addattr32(&req.n, sizeof(req), RTA_IIF, idx);
|
---|
740 | }
|
---|
741 | if (odev) {
|
---|
742 | if ((idx = ll_name_to_index(odev)) == 0) {
|
---|
743 | bb_error_msg("Cannot find device \"%s\"", odev);
|
---|
744 | return -1;
|
---|
745 | }
|
---|
746 | addattr32(&req.n, sizeof(req), RTA_OIF, idx);
|
---|
747 | }
|
---|
748 | }
|
---|
749 |
|
---|
750 | if (req.r.rtm_family == AF_UNSPEC) {
|
---|
751 | req.r.rtm_family = AF_INET;
|
---|
752 | }
|
---|
753 |
|
---|
754 | if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
|
---|
755 | exit(2);
|
---|
756 | }
|
---|
757 |
|
---|
758 | if (connected && !from_ok) {
|
---|
759 | struct rtmsg *r = NLMSG_DATA(&req.n);
|
---|
760 | int len = req.n.nlmsg_len;
|
---|
761 | struct rtattr * tb[RTA_MAX+1];
|
---|
762 |
|
---|
763 | if (print_route(NULL, &req.n, (void*)stdout) < 0) {
|
---|
764 | bb_error_msg_and_die("An error :-)");
|
---|
765 | }
|
---|
766 |
|
---|
767 | if (req.n.nlmsg_type != RTM_NEWROUTE) {
|
---|
768 | bb_error_msg("Not a route?");
|
---|
769 | return -1;
|
---|
770 | }
|
---|
771 | len -= NLMSG_LENGTH(sizeof(*r));
|
---|
772 | if (len < 0) {
|
---|
773 | bb_error_msg("Wrong len %d", len);
|
---|
774 | return -1;
|
---|
775 | }
|
---|
776 |
|
---|
777 | memset(tb, 0, sizeof(tb));
|
---|
778 | parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
|
---|
779 |
|
---|
780 | if (tb[RTA_PREFSRC]) {
|
---|
781 | tb[RTA_PREFSRC]->rta_type = RTA_SRC;
|
---|
782 | r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
|
---|
783 | } else if (!tb[RTA_SRC]) {
|
---|
784 | bb_error_msg("Failed to connect the route");
|
---|
785 | return -1;
|
---|
786 | }
|
---|
787 | if (!odev && tb[RTA_OIF]) {
|
---|
788 | tb[RTA_OIF]->rta_type = 0;
|
---|
789 | }
|
---|
790 | if (tb[RTA_GATEWAY]) {
|
---|
791 | tb[RTA_GATEWAY]->rta_type = 0;
|
---|
792 | }
|
---|
793 | if (!idev && tb[RTA_IIF]) {
|
---|
794 | tb[RTA_IIF]->rta_type = 0;
|
---|
795 | }
|
---|
796 | req.n.nlmsg_flags = NLM_F_REQUEST;
|
---|
797 | req.n.nlmsg_type = RTM_GETROUTE;
|
---|
798 |
|
---|
799 | if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
|
---|
800 | exit(2);
|
---|
801 | }
|
---|
802 | }
|
---|
803 |
|
---|
804 | if (print_route(NULL, &req.n, (void*)stdout) < 0) {
|
---|
805 | bb_error_msg_and_die("An error :-)");
|
---|
806 | }
|
---|
807 |
|
---|
808 | exit(0);
|
---|
809 | }
|
---|
810 |
|
---|
811 | int do_iproute(int argc, char **argv)
|
---|
812 | {
|
---|
813 | static const char * const ip_route_commands[] =
|
---|
814 | { "add", "append", "change", "chg", "delete", "del", "get",
|
---|
815 | "list", "show", "prepend", "replace", "test", "flush", 0 };
|
---|
816 | int command_num = 7;
|
---|
817 | unsigned int flags = 0;
|
---|
818 | int cmd = RTM_NEWROUTE;
|
---|
819 |
|
---|
820 | if (*argv) {
|
---|
821 | command_num = compare_string_array(ip_route_commands, *argv);
|
---|
822 | }
|
---|
823 | switch(command_num) {
|
---|
824 | case 0: /* add*/
|
---|
825 | flags = NLM_F_CREATE|NLM_F_EXCL;
|
---|
826 | break;
|
---|
827 | case 1: /* append */
|
---|
828 | flags = NLM_F_CREATE|NLM_F_APPEND;
|
---|
829 | break;
|
---|
830 | case 2: /* change */
|
---|
831 | case 3: /* chg */
|
---|
832 | flags = NLM_F_REPLACE;
|
---|
833 | break;
|
---|
834 | case 4: /* delete */
|
---|
835 | case 5: /* del */
|
---|
836 | cmd = RTM_DELROUTE;
|
---|
837 | break;
|
---|
838 | case 6: /* get */
|
---|
839 | return iproute_get(argc-1, argv+1);
|
---|
840 | case 7: /* list */
|
---|
841 | case 8: /* show */
|
---|
842 | return iproute_list_or_flush(argc-1, argv+1, 0);
|
---|
843 | case 9: /* prepend */
|
---|
844 | flags = NLM_F_CREATE;
|
---|
845 | case 10: /* replace */
|
---|
846 | flags = NLM_F_CREATE|NLM_F_REPLACE;
|
---|
847 | case 11: /* test */
|
---|
848 | flags = NLM_F_EXCL;
|
---|
849 | case 12: /* flush */
|
---|
850 | return iproute_list_or_flush(argc-1, argv+1, 1);
|
---|
851 | default:
|
---|
852 | bb_error_msg_and_die("Unknown command %s", *argv);
|
---|
853 | }
|
---|
854 |
|
---|
855 | return iproute_modify(cmd, flags, argc-1, argv+1);
|
---|
856 | }
|
---|