1 | /*
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2 | * ipaddress.c "ip address".
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3 | *
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4 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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5 | *
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6 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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7 | *
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8 | * Changes:
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9 | * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
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10 | */
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11 |
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12 | #include "libbb.h"
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13 | #include <sys/socket.h>
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14 | #include <sys/ioctl.h>
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15 |
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16 | #include <fnmatch.h>
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17 | #include <string.h>
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18 | #include <unistd.h>
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19 |
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20 | #include <net/if.h>
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21 | #include <net/if_arp.h>
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22 |
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23 | #include "rt_names.h"
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24 | #include "utils.h"
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25 | #include "ip_common.h"
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26 |
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27 |
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28 | static struct
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29 | {
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30 | int ifindex;
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31 | int family;
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32 | int oneline;
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33 | int showqueue;
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34 | inet_prefix pfx;
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35 | int scope, scopemask;
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36 | int flags, flagmask;
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37 | int up;
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38 | char *label;
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39 | int flushed;
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40 | char *flushb;
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41 | int flushp;
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42 | int flushe;
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43 | struct rtnl_handle *rth;
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44 | } filter;
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45 |
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46 | static void print_link_flags(FILE *fp, unsigned flags, unsigned mdown)
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47 | {
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48 | fprintf(fp, "<");
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49 | flags &= ~IFF_RUNNING;
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50 | #define _PF(f) if (flags&IFF_##f) { \
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51 | flags &= ~IFF_##f ; \
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52 | fprintf(fp, #f "%s", flags ? "," : ""); }
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53 | _PF(LOOPBACK);
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54 | _PF(BROADCAST);
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55 | _PF(POINTOPOINT);
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56 | _PF(MULTICAST);
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57 | _PF(NOARP);
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58 | #if 0
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59 | _PF(ALLMULTI);
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60 | _PF(PROMISC);
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61 | _PF(MASTER);
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62 | _PF(SLAVE);
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63 | _PF(DEBUG);
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64 | _PF(DYNAMIC);
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65 | _PF(AUTOMEDIA);
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66 | _PF(PORTSEL);
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67 | _PF(NOTRAILERS);
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68 | #endif
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69 | _PF(UP);
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70 | #undef _PF
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71 | if (flags)
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72 | fprintf(fp, "%x", flags);
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73 | if (mdown)
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74 | fprintf(fp, ",M-DOWN");
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75 | fprintf(fp, "> ");
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76 | }
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77 |
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78 | static void print_queuelen(char *name)
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79 | {
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80 | struct ifreq ifr;
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81 | int s;
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82 |
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83 | s = socket(AF_INET, SOCK_STREAM, 0);
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84 | if (s < 0)
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85 | return;
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86 |
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87 | memset(&ifr, 0, sizeof(ifr));
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88 | strcpy(ifr.ifr_name, name);
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89 | if (ioctl(s, SIOCGIFTXQLEN, &ifr) < 0) {
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90 | perror("SIOCGIFXQLEN");
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91 | close(s);
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92 | return;
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93 | }
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94 | close(s);
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95 |
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96 | if (ifr.ifr_qlen)
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97 | printf("qlen %d", ifr.ifr_qlen);
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98 | }
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99 |
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100 | static int print_linkinfo(struct sockaddr_nl ATTRIBUTE_UNUSED *who,
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101 | struct nlmsghdr *n, void ATTRIBUTE_UNUSED *arg)
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102 | {
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103 | FILE *fp = (FILE*)arg;
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104 | struct ifinfomsg *ifi = NLMSG_DATA(n);
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105 | struct rtattr * tb[IFLA_MAX+1];
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106 | int len = n->nlmsg_len;
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107 | unsigned m_flag = 0;
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108 |
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109 | if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
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110 | return 0;
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111 |
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112 | len -= NLMSG_LENGTH(sizeof(*ifi));
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113 | if (len < 0)
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114 | return -1;
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115 |
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116 | if (filter.ifindex && ifi->ifi_index != filter.ifindex)
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117 | return 0;
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118 | if (filter.up && !(ifi->ifi_flags&IFF_UP))
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119 | return 0;
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120 |
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121 | memset(tb, 0, sizeof(tb));
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122 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
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123 | if (tb[IFLA_IFNAME] == NULL) {
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124 | bb_error_msg("nil ifname");
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125 | return -1;
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126 | }
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127 | if (filter.label &&
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128 | (!filter.family || filter.family == AF_PACKET) &&
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129 | fnmatch(filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0))
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130 | return 0;
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131 |
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132 | if (n->nlmsg_type == RTM_DELLINK)
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133 | fprintf(fp, "Deleted ");
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134 |
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135 | fprintf(fp, "%d: %s", ifi->ifi_index,
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136 | tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>");
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137 |
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138 | if (tb[IFLA_LINK]) {
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139 | SPRINT_BUF(b1);
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140 | int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
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141 | if (iflink == 0)
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142 | fprintf(fp, "@NONE: ");
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143 | else {
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144 | fprintf(fp, "@%s: ", ll_idx_n2a(iflink, b1));
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145 | m_flag = ll_index_to_flags(iflink);
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146 | m_flag = !(m_flag & IFF_UP);
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147 | }
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148 | } else {
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149 | fprintf(fp, ": ");
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150 | }
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151 | print_link_flags(fp, ifi->ifi_flags, m_flag);
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152 |
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153 | if (tb[IFLA_MTU])
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154 | fprintf(fp, "mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
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155 | if (tb[IFLA_QDISC])
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156 | fprintf(fp, "qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
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157 | #ifdef IFLA_MASTER
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158 | if (tb[IFLA_MASTER]) {
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159 | SPRINT_BUF(b1);
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160 | fprintf(fp, "master %s ", ll_idx_n2a(*(int*)RTA_DATA(tb[IFLA_MASTER]), b1));
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161 | }
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162 | #endif
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163 | if (filter.showqueue)
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164 | print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
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165 |
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166 | if (!filter.family || filter.family == AF_PACKET) {
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167 | SPRINT_BUF(b1);
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168 | fprintf(fp, "%s", _SL_);
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169 | fprintf(fp, " link/%s ", ll_type_n2a(ifi->ifi_type, b1, sizeof(b1)));
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170 |
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171 | if (tb[IFLA_ADDRESS]) {
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172 | fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
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173 | RTA_PAYLOAD(tb[IFLA_ADDRESS]),
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174 | ifi->ifi_type,
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175 | b1, sizeof(b1)));
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176 | }
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177 | if (tb[IFLA_BROADCAST]) {
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178 | if (ifi->ifi_flags&IFF_POINTOPOINT)
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179 | fprintf(fp, " peer ");
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180 | else
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181 | fprintf(fp, " brd ");
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182 | fprintf(fp, "%s", ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
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183 | RTA_PAYLOAD(tb[IFLA_BROADCAST]),
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184 | ifi->ifi_type,
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185 | b1, sizeof(b1)));
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186 | }
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187 | }
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188 | fprintf(fp, "\n");
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189 | fflush(fp);
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190 | return 0;
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191 | }
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192 |
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193 | static int flush_update(void)
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194 | {
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195 | if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
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196 | perror("Failed to send flush request\n");
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197 | return -1;
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198 | }
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199 | filter.flushp = 0;
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200 | return 0;
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201 | }
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202 |
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203 | static int print_addrinfo(struct sockaddr_nl ATTRIBUTE_UNUSED *who,
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204 | struct nlmsghdr *n, void ATTRIBUTE_UNUSED *arg)
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205 | {
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206 | FILE *fp = (FILE*)arg;
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207 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
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208 | int len = n->nlmsg_len;
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209 | struct rtattr * rta_tb[IFA_MAX+1];
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210 | char abuf[256];
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211 | SPRINT_BUF(b1);
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212 |
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213 | if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
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214 | return 0;
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215 | len -= NLMSG_LENGTH(sizeof(*ifa));
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216 | if (len < 0) {
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217 | bb_error_msg("wrong nlmsg len %d", len);
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218 | return -1;
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219 | }
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220 |
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221 | if (filter.flushb && n->nlmsg_type != RTM_NEWADDR)
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222 | return 0;
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223 |
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224 | memset(rta_tb, 0, sizeof(rta_tb));
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225 | parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
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226 |
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227 | if (!rta_tb[IFA_LOCAL])
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228 | rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
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229 | if (!rta_tb[IFA_ADDRESS])
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230 | rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
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231 |
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232 | if (filter.ifindex && filter.ifindex != ifa->ifa_index)
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233 | return 0;
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234 | if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
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235 | return 0;
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236 | if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
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237 | return 0;
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238 | if (filter.label) {
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239 | const char *label;
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240 | if (rta_tb[IFA_LABEL])
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241 | label = RTA_DATA(rta_tb[IFA_LABEL]);
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242 | else
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243 | label = ll_idx_n2a(ifa->ifa_index, b1);
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244 | if (fnmatch(filter.label, label, 0) != 0)
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245 | return 0;
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246 | }
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247 | if (filter.pfx.family) {
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248 | if (rta_tb[IFA_LOCAL]) {
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249 | inet_prefix dst;
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250 | memset(&dst, 0, sizeof(dst));
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251 | dst.family = ifa->ifa_family;
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252 | memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
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253 | if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
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254 | return 0;
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255 | }
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256 | }
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257 |
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258 | if (filter.flushb) {
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259 | struct nlmsghdr *fn;
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260 | if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
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261 | if (flush_update())
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262 | return -1;
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263 | }
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264 | fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
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265 | memcpy(fn, n, n->nlmsg_len);
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266 | fn->nlmsg_type = RTM_DELADDR;
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267 | fn->nlmsg_flags = NLM_F_REQUEST;
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268 | fn->nlmsg_seq = ++filter.rth->seq;
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269 | filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
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270 | filter.flushed++;
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271 | return 0;
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272 | }
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273 |
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274 | if (n->nlmsg_type == RTM_DELADDR)
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275 | fprintf(fp, "Deleted ");
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276 |
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277 | if (filter.oneline)
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278 | fprintf(fp, "%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
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279 | if (ifa->ifa_family == AF_INET)
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280 | fprintf(fp, " inet ");
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281 | else if (ifa->ifa_family == AF_INET6)
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282 | fprintf(fp, " inet6 ");
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283 | else
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284 | fprintf(fp, " family %d ", ifa->ifa_family);
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285 |
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286 | if (rta_tb[IFA_LOCAL]) {
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287 | fprintf(fp, "%s", rt_addr_n2a(ifa->ifa_family,
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288 | RTA_PAYLOAD(rta_tb[IFA_LOCAL]),
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289 | RTA_DATA(rta_tb[IFA_LOCAL]),
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290 | abuf, sizeof(abuf)));
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291 |
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292 | if (rta_tb[IFA_ADDRESS] == NULL ||
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293 | memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0) {
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294 | fprintf(fp, "/%d ", ifa->ifa_prefixlen);
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295 | } else {
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296 | fprintf(fp, " peer %s/%d ",
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297 | rt_addr_n2a(ifa->ifa_family,
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298 | RTA_PAYLOAD(rta_tb[IFA_ADDRESS]),
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299 | RTA_DATA(rta_tb[IFA_ADDRESS]),
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300 | abuf, sizeof(abuf)),
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301 | ifa->ifa_prefixlen);
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302 | }
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303 | }
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304 |
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305 | if (rta_tb[IFA_BROADCAST]) {
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306 | fprintf(fp, "brd %s ",
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307 | rt_addr_n2a(ifa->ifa_family,
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308 | RTA_PAYLOAD(rta_tb[IFA_BROADCAST]),
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309 | RTA_DATA(rta_tb[IFA_BROADCAST]),
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310 | abuf, sizeof(abuf)));
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311 | }
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312 | if (rta_tb[IFA_ANYCAST]) {
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313 | fprintf(fp, "any %s ",
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314 | rt_addr_n2a(ifa->ifa_family,
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315 | RTA_PAYLOAD(rta_tb[IFA_ANYCAST]),
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316 | RTA_DATA(rta_tb[IFA_ANYCAST]),
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317 | abuf, sizeof(abuf)));
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318 | }
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319 | fprintf(fp, "scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope, b1, sizeof(b1)));
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320 | if (ifa->ifa_flags&IFA_F_SECONDARY) {
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321 | ifa->ifa_flags &= ~IFA_F_SECONDARY;
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322 | fprintf(fp, "secondary ");
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323 | }
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324 | if (ifa->ifa_flags&IFA_F_TENTATIVE) {
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325 | ifa->ifa_flags &= ~IFA_F_TENTATIVE;
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326 | fprintf(fp, "tentative ");
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327 | }
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328 | if (ifa->ifa_flags&IFA_F_DEPRECATED) {
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329 | ifa->ifa_flags &= ~IFA_F_DEPRECATED;
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330 | fprintf(fp, "deprecated ");
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331 | }
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332 | if (!(ifa->ifa_flags&IFA_F_PERMANENT)) {
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333 | fprintf(fp, "dynamic ");
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334 | } else
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335 | ifa->ifa_flags &= ~IFA_F_PERMANENT;
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336 | if (ifa->ifa_flags)
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337 | fprintf(fp, "flags %02x ", ifa->ifa_flags);
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338 | if (rta_tb[IFA_LABEL])
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339 | fprintf(fp, "%s", (char*)RTA_DATA(rta_tb[IFA_LABEL]));
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340 | if (rta_tb[IFA_CACHEINFO]) {
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341 | struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
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342 | char buf[128];
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343 | fprintf(fp, "%s", _SL_);
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344 | if (ci->ifa_valid == 0xFFFFFFFFU)
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345 | sprintf(buf, "valid_lft forever");
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346 | else
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347 | sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
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348 | if (ci->ifa_prefered == 0xFFFFFFFFU)
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349 | sprintf(buf+strlen(buf), " preferred_lft forever");
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350 | else
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351 | sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
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352 | fprintf(fp, " %s", buf);
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353 | }
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354 | fprintf(fp, "\n");
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355 | fflush(fp);
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356 | return 0;
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357 | }
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358 |
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359 |
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360 | struct nlmsg_list
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361 | {
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362 | struct nlmsg_list *next;
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363 | struct nlmsghdr h;
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364 | };
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365 |
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366 | static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo, FILE *fp)
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367 | {
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368 | for ( ;ainfo ; ainfo = ainfo->next) {
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369 | struct nlmsghdr *n = &ainfo->h;
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370 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
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371 |
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372 | if (n->nlmsg_type != RTM_NEWADDR)
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373 | continue;
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374 |
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375 | if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
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376 | return -1;
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377 |
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378 | if (ifa->ifa_index != ifindex ||
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379 | (filter.family && filter.family != ifa->ifa_family))
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380 | continue;
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381 |
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382 | print_addrinfo(NULL, n, fp);
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383 | }
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384 | return 0;
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385 | }
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386 |
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387 |
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388 | static int store_nlmsg(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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389 | {
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390 | struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
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391 | struct nlmsg_list *h;
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392 | struct nlmsg_list **lp;
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393 |
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394 | h = malloc(n->nlmsg_len+sizeof(void*));
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395 | if (h == NULL)
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396 | return -1;
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397 |
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398 | memcpy(&h->h, n, n->nlmsg_len);
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399 | h->next = NULL;
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400 |
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401 | for (lp = linfo; *lp; lp = &(*lp)->next) /* NOTHING */;
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402 | *lp = h;
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403 |
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404 | ll_remember_index(who, n, NULL);
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405 | return 0;
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406 | }
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407 |
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408 | static void ipaddr_reset_filter(int _oneline)
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409 | {
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410 | memset(&filter, 0, sizeof(filter));
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411 | filter.oneline = _oneline;
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412 | }
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413 |
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414 | int ipaddr_list_or_flush(int argc, char **argv, int flush)
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415 | {
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416 | static const char *const option[] = { "to", "scope", "up", "label", "dev", 0 };
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417 |
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418 | struct nlmsg_list *linfo = NULL;
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419 | struct nlmsg_list *ainfo = NULL;
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420 | struct nlmsg_list *l;
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421 | struct rtnl_handle rth;
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422 | char *filter_dev = NULL;
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423 | int no_link = 0;
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424 |
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425 | ipaddr_reset_filter(oneline);
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426 | filter.showqueue = 1;
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427 |
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428 | if (filter.family == AF_UNSPEC)
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429 | filter.family = preferred_family;
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430 |
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431 | if (flush) {
|
---|
432 | if (argc <= 0) {
|
---|
433 | bb_error_msg(bb_msg_requires_arg, "flush");
|
---|
434 | return -1;
|
---|
435 | }
|
---|
436 | if (filter.family == AF_PACKET) {
|
---|
437 | bb_error_msg("Cannot flush link addresses.");
|
---|
438 | return -1;
|
---|
439 | }
|
---|
440 | }
|
---|
441 |
|
---|
442 | while (argc > 0) {
|
---|
443 | const int option_num = compare_string_array(option, *argv);
|
---|
444 | switch (option_num) {
|
---|
445 | case 0: /* to */
|
---|
446 | NEXT_ARG();
|
---|
447 | get_prefix(&filter.pfx, *argv, filter.family);
|
---|
448 | if (filter.family == AF_UNSPEC) {
|
---|
449 | filter.family = filter.pfx.family;
|
---|
450 | }
|
---|
451 | break;
|
---|
452 | case 1: /* scope */
|
---|
453 | {
|
---|
454 | uint32_t scope = 0;
|
---|
455 | NEXT_ARG();
|
---|
456 | filter.scopemask = -1;
|
---|
457 | if (rtnl_rtscope_a2n(&scope, *argv)) {
|
---|
458 | if (strcmp(*argv, "all") != 0) {
|
---|
459 | invarg(*argv, "scope");
|
---|
460 | }
|
---|
461 | scope = RT_SCOPE_NOWHERE;
|
---|
462 | filter.scopemask = 0;
|
---|
463 | }
|
---|
464 | filter.scope = scope;
|
---|
465 | break;
|
---|
466 | }
|
---|
467 | case 2: /* up */
|
---|
468 | filter.up = 1;
|
---|
469 | break;
|
---|
470 | case 3: /* label */
|
---|
471 | NEXT_ARG();
|
---|
472 | filter.label = *argv;
|
---|
473 | break;
|
---|
474 | case 4: /* dev */
|
---|
475 | NEXT_ARG();
|
---|
476 | default:
|
---|
477 | if (filter_dev) {
|
---|
478 | duparg2("dev", *argv);
|
---|
479 | }
|
---|
480 | filter_dev = *argv;
|
---|
481 | }
|
---|
482 | argv++;
|
---|
483 | argc--;
|
---|
484 | }
|
---|
485 |
|
---|
486 | if (rtnl_open(&rth, 0) < 0)
|
---|
487 | exit(1);
|
---|
488 |
|
---|
489 | if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK) < 0) {
|
---|
490 | bb_perror_msg_and_die("Cannot send dump request");
|
---|
491 | }
|
---|
492 |
|
---|
493 | if (rtnl_dump_filter(&rth, store_nlmsg, &linfo, NULL, NULL) < 0) {
|
---|
494 | bb_error_msg_and_die("Dump terminated");
|
---|
495 | }
|
---|
496 |
|
---|
497 | if (filter_dev) {
|
---|
498 | filter.ifindex = ll_name_to_index(filter_dev);
|
---|
499 | if (filter.ifindex <= 0) {
|
---|
500 | bb_error_msg("Device \"%s\" does not exist", filter_dev);
|
---|
501 | return -1;
|
---|
502 | }
|
---|
503 | }
|
---|
504 |
|
---|
505 | if (flush) {
|
---|
506 | char flushb[4096-512];
|
---|
507 |
|
---|
508 | filter.flushb = flushb;
|
---|
509 | filter.flushp = 0;
|
---|
510 | filter.flushe = sizeof(flushb);
|
---|
511 | filter.rth = &rth;
|
---|
512 |
|
---|
513 | for (;;) {
|
---|
514 | if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
|
---|
515 | perror("Cannot send dump request");
|
---|
516 | exit(1);
|
---|
517 | }
|
---|
518 | filter.flushed = 0;
|
---|
519 | if (rtnl_dump_filter(&rth, print_addrinfo, stdout, NULL, NULL) < 0) {
|
---|
520 | fprintf(stderr, "Flush terminated\n");
|
---|
521 | exit(1);
|
---|
522 | }
|
---|
523 | if (filter.flushed == 0) {
|
---|
524 | fflush(stdout);
|
---|
525 | return 0;
|
---|
526 | }
|
---|
527 | if (flush_update() < 0)
|
---|
528 | exit(1);
|
---|
529 | }
|
---|
530 | }
|
---|
531 |
|
---|
532 | if (filter.family != AF_PACKET) {
|
---|
533 | if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
|
---|
534 | bb_perror_msg_and_die("Cannot send dump request");
|
---|
535 | }
|
---|
536 |
|
---|
537 | if (rtnl_dump_filter(&rth, store_nlmsg, &ainfo, NULL, NULL) < 0) {
|
---|
538 | bb_error_msg_and_die("Dump terminated");
|
---|
539 | }
|
---|
540 | }
|
---|
541 |
|
---|
542 |
|
---|
543 | if (filter.family && filter.family != AF_PACKET) {
|
---|
544 | struct nlmsg_list **lp;
|
---|
545 | lp=&linfo;
|
---|
546 |
|
---|
547 | if (filter.oneline)
|
---|
548 | no_link = 1;
|
---|
549 |
|
---|
550 | while ((l=*lp)!=NULL) {
|
---|
551 | int ok = 0;
|
---|
552 | struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
|
---|
553 | struct nlmsg_list *a;
|
---|
554 |
|
---|
555 | for (a=ainfo; a; a=a->next) {
|
---|
556 | struct nlmsghdr *n = &a->h;
|
---|
557 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
|
---|
558 |
|
---|
559 | if (ifa->ifa_index != ifi->ifi_index ||
|
---|
560 | (filter.family && filter.family != ifa->ifa_family))
|
---|
561 | continue;
|
---|
562 | if ((filter.scope^ifa->ifa_scope)&filter.scopemask)
|
---|
563 | continue;
|
---|
564 | if ((filter.flags^ifa->ifa_flags)&filter.flagmask)
|
---|
565 | continue;
|
---|
566 | if (filter.pfx.family || filter.label) {
|
---|
567 | struct rtattr *tb[IFA_MAX+1];
|
---|
568 | memset(tb, 0, sizeof(tb));
|
---|
569 | parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
|
---|
570 | if (!tb[IFA_LOCAL])
|
---|
571 | tb[IFA_LOCAL] = tb[IFA_ADDRESS];
|
---|
572 |
|
---|
573 | if (filter.pfx.family && tb[IFA_LOCAL]) {
|
---|
574 | inet_prefix dst;
|
---|
575 | memset(&dst, 0, sizeof(dst));
|
---|
576 | dst.family = ifa->ifa_family;
|
---|
577 | memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
|
---|
578 | if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
|
---|
579 | continue;
|
---|
580 | }
|
---|
581 | if (filter.label) {
|
---|
582 | SPRINT_BUF(b1);
|
---|
583 | const char *label;
|
---|
584 | if (tb[IFA_LABEL])
|
---|
585 | label = RTA_DATA(tb[IFA_LABEL]);
|
---|
586 | else
|
---|
587 | label = ll_idx_n2a(ifa->ifa_index, b1);
|
---|
588 | if (fnmatch(filter.label, label, 0) != 0)
|
---|
589 | continue;
|
---|
590 | }
|
---|
591 | }
|
---|
592 |
|
---|
593 | ok = 1;
|
---|
594 | break;
|
---|
595 | }
|
---|
596 | if (!ok)
|
---|
597 | *lp = l->next;
|
---|
598 | else
|
---|
599 | lp = &l->next;
|
---|
600 | }
|
---|
601 | }
|
---|
602 |
|
---|
603 | for (l=linfo; l; l = l->next) {
|
---|
604 | if (no_link || print_linkinfo(NULL, &l->h, stdout) == 0) {
|
---|
605 | struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
|
---|
606 | if (filter.family != AF_PACKET)
|
---|
607 | print_selected_addrinfo(ifi->ifi_index, ainfo, stdout);
|
---|
608 | }
|
---|
609 | fflush(stdout);
|
---|
610 | }
|
---|
611 |
|
---|
612 | exit(0);
|
---|
613 | }
|
---|
614 |
|
---|
615 | static int default_scope(inet_prefix *lcl)
|
---|
616 | {
|
---|
617 | if (lcl->family == AF_INET) {
|
---|
618 | if (lcl->bytelen >= 1 && *(__u8*)&lcl->data == 127)
|
---|
619 | return RT_SCOPE_HOST;
|
---|
620 | }
|
---|
621 | return 0;
|
---|
622 | }
|
---|
623 |
|
---|
624 | static int ipaddr_modify(int cmd, int argc, char **argv)
|
---|
625 | {
|
---|
626 | static const char *const option[] = {
|
---|
627 | "peer", "remote", "broadcast", "brd",
|
---|
628 | "anycast", "scope", "dev", "label", "local", 0
|
---|
629 | };
|
---|
630 |
|
---|
631 | struct rtnl_handle rth;
|
---|
632 | struct {
|
---|
633 | struct nlmsghdr n;
|
---|
634 | struct ifaddrmsg ifa;
|
---|
635 | char buf[256];
|
---|
636 | } req;
|
---|
637 | char *d = NULL;
|
---|
638 | char *l = NULL;
|
---|
639 | inet_prefix lcl;
|
---|
640 | inet_prefix peer;
|
---|
641 | int local_len = 0;
|
---|
642 | int peer_len = 0;
|
---|
643 | int brd_len = 0;
|
---|
644 | int any_len = 0;
|
---|
645 | int scoped = 0;
|
---|
646 |
|
---|
647 | memset(&req, 0, sizeof(req));
|
---|
648 |
|
---|
649 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
|
---|
650 | req.n.nlmsg_flags = NLM_F_REQUEST;
|
---|
651 | req.n.nlmsg_type = cmd;
|
---|
652 | req.ifa.ifa_family = preferred_family;
|
---|
653 |
|
---|
654 | while (argc > 0) {
|
---|
655 | const int option_num = compare_string_array(option, *argv);
|
---|
656 | switch (option_num) {
|
---|
657 | case 0: /* peer */
|
---|
658 | case 1: /* remote */
|
---|
659 | NEXT_ARG();
|
---|
660 |
|
---|
661 | if (peer_len) {
|
---|
662 | duparg("peer", *argv);
|
---|
663 | }
|
---|
664 | get_prefix(&peer, *argv, req.ifa.ifa_family);
|
---|
665 | peer_len = peer.bytelen;
|
---|
666 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
667 | req.ifa.ifa_family = peer.family;
|
---|
668 | }
|
---|
669 | addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
|
---|
670 | req.ifa.ifa_prefixlen = peer.bitlen;
|
---|
671 | break;
|
---|
672 | case 2: /* broadcast */
|
---|
673 | case 3: /* brd */
|
---|
674 | {
|
---|
675 | inet_prefix addr;
|
---|
676 | NEXT_ARG();
|
---|
677 | if (brd_len) {
|
---|
678 | duparg("broadcast", *argv);
|
---|
679 | }
|
---|
680 | if (strcmp(*argv, "+") == 0) {
|
---|
681 | brd_len = -1;
|
---|
682 | }
|
---|
683 | else if (strcmp(*argv, "-") == 0) {
|
---|
684 | brd_len = -2;
|
---|
685 | } else {
|
---|
686 | get_addr(&addr, *argv, req.ifa.ifa_family);
|
---|
687 | if (req.ifa.ifa_family == AF_UNSPEC)
|
---|
688 | req.ifa.ifa_family = addr.family;
|
---|
689 | addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
|
---|
690 | brd_len = addr.bytelen;
|
---|
691 | }
|
---|
692 | break;
|
---|
693 | }
|
---|
694 | case 4: /* anycast */
|
---|
695 | {
|
---|
696 | inet_prefix addr;
|
---|
697 | NEXT_ARG();
|
---|
698 | if (any_len) {
|
---|
699 | duparg("anycast", *argv);
|
---|
700 | }
|
---|
701 | get_addr(&addr, *argv, req.ifa.ifa_family);
|
---|
702 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
703 | req.ifa.ifa_family = addr.family;
|
---|
704 | }
|
---|
705 | addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
|
---|
706 | any_len = addr.bytelen;
|
---|
707 | break;
|
---|
708 | }
|
---|
709 | case 5: /* scope */
|
---|
710 | {
|
---|
711 | uint32_t scope = 0;
|
---|
712 | NEXT_ARG();
|
---|
713 | if (rtnl_rtscope_a2n(&scope, *argv)) {
|
---|
714 | invarg(*argv, "scope");
|
---|
715 | }
|
---|
716 | req.ifa.ifa_scope = scope;
|
---|
717 | scoped = 1;
|
---|
718 | break;
|
---|
719 | }
|
---|
720 | case 6: /* dev */
|
---|
721 | NEXT_ARG();
|
---|
722 | d = *argv;
|
---|
723 | break;
|
---|
724 | case 7: /* label */
|
---|
725 | NEXT_ARG();
|
---|
726 | l = *argv;
|
---|
727 | addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1);
|
---|
728 | break;
|
---|
729 | case 8: /* local */
|
---|
730 | NEXT_ARG();
|
---|
731 | default:
|
---|
732 | if (local_len) {
|
---|
733 | duparg2("local", *argv);
|
---|
734 | }
|
---|
735 | get_prefix(&lcl, *argv, req.ifa.ifa_family);
|
---|
736 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
737 | req.ifa.ifa_family = lcl.family;
|
---|
738 | }
|
---|
739 | addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
|
---|
740 | local_len = lcl.bytelen;
|
---|
741 | }
|
---|
742 | argc--;
|
---|
743 | argv++;
|
---|
744 | }
|
---|
745 |
|
---|
746 | if (d == NULL) {
|
---|
747 | bb_error_msg(bb_msg_requires_arg,"\"dev\"");
|
---|
748 | return -1;
|
---|
749 | }
|
---|
750 | if (l && matches(d, l) != 0) {
|
---|
751 | bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
|
---|
752 | }
|
---|
753 |
|
---|
754 | if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
|
---|
755 | peer = lcl;
|
---|
756 | addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
|
---|
757 | }
|
---|
758 | if (req.ifa.ifa_prefixlen == 0)
|
---|
759 | req.ifa.ifa_prefixlen = lcl.bitlen;
|
---|
760 |
|
---|
761 | if (brd_len < 0 && cmd != RTM_DELADDR) {
|
---|
762 | inet_prefix brd;
|
---|
763 | int i;
|
---|
764 | if (req.ifa.ifa_family != AF_INET) {
|
---|
765 | bb_error_msg("Broadcast can be set only for IPv4 addresses");
|
---|
766 | return -1;
|
---|
767 | }
|
---|
768 | brd = peer;
|
---|
769 | if (brd.bitlen <= 30) {
|
---|
770 | for (i=31; i>=brd.bitlen; i--) {
|
---|
771 | if (brd_len == -1)
|
---|
772 | brd.data[0] |= htonl(1<<(31-i));
|
---|
773 | else
|
---|
774 | brd.data[0] &= ~htonl(1<<(31-i));
|
---|
775 | }
|
---|
776 | addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
|
---|
777 | brd_len = brd.bytelen;
|
---|
778 | }
|
---|
779 | }
|
---|
780 | if (!scoped && cmd != RTM_DELADDR)
|
---|
781 | req.ifa.ifa_scope = default_scope(&lcl);
|
---|
782 |
|
---|
783 | if (rtnl_open(&rth, 0) < 0)
|
---|
784 | exit(1);
|
---|
785 |
|
---|
786 | ll_init_map(&rth);
|
---|
787 |
|
---|
788 | if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) {
|
---|
789 | bb_error_msg("Cannot find device \"%s\"", d);
|
---|
790 | return -1;
|
---|
791 | }
|
---|
792 |
|
---|
793 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
|
---|
794 | exit(2);
|
---|
795 |
|
---|
796 | exit(0);
|
---|
797 | }
|
---|
798 |
|
---|
799 | int do_ipaddr(int argc, char **argv)
|
---|
800 | {
|
---|
801 | static const char *const commands[] = {
|
---|
802 | "add", "delete", "list", "show", "lst", "flush", 0
|
---|
803 | };
|
---|
804 |
|
---|
805 | int command_num = 2;
|
---|
806 |
|
---|
807 | if (*argv) {
|
---|
808 | command_num = compare_string_array(commands, *argv);
|
---|
809 | }
|
---|
810 | switch (command_num) {
|
---|
811 | case 0: /* add */
|
---|
812 | return ipaddr_modify(RTM_NEWADDR, argc-1, argv+1);
|
---|
813 | case 1: /* delete */
|
---|
814 | return ipaddr_modify(RTM_DELADDR, argc-1, argv+1);
|
---|
815 | case 2: /* list */
|
---|
816 | case 3: /* show */
|
---|
817 | case 4: /* lst */
|
---|
818 | return ipaddr_list_or_flush(argc-1, argv+1, 0);
|
---|
819 | case 5: /* flush */
|
---|
820 | return ipaddr_list_or_flush(argc-1, argv+1, 1);
|
---|
821 | }
|
---|
822 | bb_error_msg_and_die("Unknown command %s", *argv);
|
---|
823 | }
|
---|