1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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4 | *
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5 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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6 | *
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7 | * Changes:
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8 | * Laszlo Valko <valko@linux.karinthy.hu> 990223: address label must be zero terminated
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9 | */
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10 |
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11 | #include <fnmatch.h>
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12 | #include <net/if.h>
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13 | #include <net/if_arp.h>
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14 |
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15 | #include "ip_common.h" /* #include "libbb.h" is inside */
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16 | #include "common_bufsiz.h"
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17 | #include "rt_names.h"
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18 | #include "utils.h"
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19 |
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20 | #ifndef IFF_LOWER_UP
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21 | /* from linux/if.h */
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22 | #define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
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23 | #endif
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24 |
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25 | struct filter_t {
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26 | char *label;
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27 | char *flushb;
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28 | struct rtnl_handle *rth;
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29 | int scope, scopemask;
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30 | int flags, flagmask;
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31 | int flushp;
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32 | int flushe;
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33 | int ifindex;
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34 | family_t family;
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35 | smallint showqueue;
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36 | smallint oneline;
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37 | smallint up;
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38 | smallint flushed;
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39 | inet_prefix pfx;
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40 | } FIX_ALIASING;
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41 | typedef struct filter_t filter_t;
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42 |
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43 | #define G_filter (*(filter_t*)bb_common_bufsiz1)
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44 | #define INIT_G() do { setup_common_bufsiz(); } while (0)
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45 |
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46 | static void print_link_flags(unsigned flags, unsigned mdown)
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47 | {
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48 | static const int flag_masks[] = {
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49 | IFF_LOOPBACK, IFF_BROADCAST, IFF_POINTOPOINT,
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50 | IFF_MULTICAST, IFF_NOARP, IFF_UP, IFF_LOWER_UP };
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51 | static const char flag_labels[] ALIGN1 =
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52 | "LOOPBACK\0""BROADCAST\0""POINTOPOINT\0"
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53 | "MULTICAST\0""NOARP\0""UP\0""LOWER_UP\0";
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54 |
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55 | bb_putchar('<');
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56 | if (flags & IFF_UP && !(flags & IFF_RUNNING))
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57 | printf("NO-CARRIER,");
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58 | flags &= ~IFF_RUNNING;
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59 | #if 0
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60 | _PF(ALLMULTI);
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61 | _PF(PROMISC);
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62 | _PF(MASTER);
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63 | _PF(SLAVE);
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64 | _PF(DEBUG);
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65 | _PF(DYNAMIC);
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66 | _PF(AUTOMEDIA);
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67 | _PF(PORTSEL);
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68 | _PF(NOTRAILERS);
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69 | #endif
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70 | flags = print_flags_separated(flag_masks, flag_labels, flags, ",");
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71 | if (flags)
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72 | printf("%x", flags);
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73 | if (mdown)
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74 | printf(",M-DOWN");
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75 | printf("> ");
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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 | strncpy_IFNAMSIZ(ifr.ifr_name, name);
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89 | if (ioctl_or_warn(s, SIOCGIFTXQLEN, &ifr) < 0) {
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90 | close(s);
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91 | return;
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92 | }
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93 | close(s);
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94 |
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95 | if (ifr.ifr_qlen)
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96 | printf("qlen %d", ifr.ifr_qlen);
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97 | }
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98 |
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99 | static NOINLINE int print_linkinfo(const struct nlmsghdr *n)
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100 | {
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101 | struct ifinfomsg *ifi = NLMSG_DATA(n);
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102 | struct rtattr *tb[IFLA_MAX+1];
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103 | int len = n->nlmsg_len;
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104 |
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105 | if (n->nlmsg_type != RTM_NEWLINK && n->nlmsg_type != RTM_DELLINK)
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106 | return 0;
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107 |
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108 | len -= NLMSG_LENGTH(sizeof(*ifi));
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109 | if (len < 0)
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110 | return -1;
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111 |
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112 | if (G_filter.ifindex && ifi->ifi_index != G_filter.ifindex)
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113 | return 0;
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114 | if (G_filter.up && !(ifi->ifi_flags & IFF_UP))
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115 | return 0;
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116 |
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117 | memset(tb, 0, sizeof(tb));
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118 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
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119 | if (tb[IFLA_IFNAME] == NULL) {
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120 | bb_error_msg("nil ifname");
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121 | return -1;
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122 | }
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123 | if (G_filter.label
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124 | && (!G_filter.family || G_filter.family == AF_PACKET)
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125 | && fnmatch(G_filter.label, RTA_DATA(tb[IFLA_IFNAME]), 0)
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126 | ) {
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127 | return 0;
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128 | }
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129 |
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130 | if (n->nlmsg_type == RTM_DELLINK)
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131 | printf("Deleted ");
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132 |
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133 | printf("%d: %s", ifi->ifi_index,
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134 | /*tb[IFLA_IFNAME] ? (char*)RTA_DATA(tb[IFLA_IFNAME]) : "<nil>" - we checked tb[IFLA_IFNAME] above*/
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135 | (char*)RTA_DATA(tb[IFLA_IFNAME])
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136 | );
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137 |
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138 | {
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139 | unsigned m_flag = 0;
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140 | if (tb[IFLA_LINK]) {
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141 | int iflink = *(int*)RTA_DATA(tb[IFLA_LINK]);
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142 | if (iflink == 0)
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143 | printf("@NONE: ");
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144 | else {
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145 | printf("@%s: ", ll_index_to_name(iflink));
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146 | m_flag = ll_index_to_flags(iflink);
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147 | m_flag = !(m_flag & IFF_UP);
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148 | }
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149 | } else {
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150 | printf(": ");
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151 | }
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152 | print_link_flags(ifi->ifi_flags, m_flag);
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153 | }
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154 |
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155 | if (tb[IFLA_MTU])
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156 | printf("mtu %u ", *(int*)RTA_DATA(tb[IFLA_MTU]));
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157 | if (tb[IFLA_QDISC])
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158 | printf("qdisc %s ", (char*)RTA_DATA(tb[IFLA_QDISC]));
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159 | #ifdef IFLA_MASTER
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160 | if (tb[IFLA_MASTER]) {
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161 | printf("master %s ", ll_index_to_name(*(int*)RTA_DATA(tb[IFLA_MASTER])));
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162 | }
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163 | #endif
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164 | /* IFLA_OPERSTATE was added to kernel with the same commit as IFF_DORMANT */
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165 | #ifdef IFF_DORMANT
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166 | if (tb[IFLA_OPERSTATE]) {
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167 | static const char operstate_labels[] ALIGN1 =
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168 | "UNKNOWN\0""NOTPRESENT\0""DOWN\0""LOWERLAYERDOWN\0"
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169 | "TESTING\0""DORMANT\0""UP\0";
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170 | printf("state %s ", nth_string(operstate_labels,
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171 | *(uint8_t *)RTA_DATA(tb[IFLA_OPERSTATE])));
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172 | }
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173 | #endif
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174 | if (G_filter.showqueue)
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175 | print_queuelen((char*)RTA_DATA(tb[IFLA_IFNAME]));
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176 |
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177 | if (!G_filter.family || G_filter.family == AF_PACKET) {
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178 | SPRINT_BUF(b1);
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179 | printf("%c link/%s ", _SL_, ll_type_n2a(ifi->ifi_type, b1));
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180 |
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181 | if (tb[IFLA_ADDRESS]) {
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182 | fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_ADDRESS]),
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183 | RTA_PAYLOAD(tb[IFLA_ADDRESS]),
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184 | ifi->ifi_type,
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185 | b1, sizeof(b1)), stdout);
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186 | }
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187 | if (tb[IFLA_BROADCAST]) {
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188 | if (ifi->ifi_flags & IFF_POINTOPOINT)
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189 | printf(" peer ");
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190 | else
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191 | printf(" brd ");
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192 | fputs(ll_addr_n2a(RTA_DATA(tb[IFLA_BROADCAST]),
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193 | RTA_PAYLOAD(tb[IFLA_BROADCAST]),
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194 | ifi->ifi_type,
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195 | b1, sizeof(b1)), stdout);
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196 | }
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197 | }
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198 | bb_putchar('\n');
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199 | /*fflush_all();*/
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200 | return 0;
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201 | }
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202 |
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203 | static int flush_update(void)
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204 | {
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205 | if (rtnl_send(G_filter.rth, G_filter.flushb, G_filter.flushp) < 0) {
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206 | bb_perror_msg("can't send flush request");
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207 | return -1;
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208 | }
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209 | G_filter.flushp = 0;
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210 | return 0;
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211 | }
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212 |
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213 | static int FAST_FUNC print_addrinfo(const struct sockaddr_nl *who UNUSED_PARAM,
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214 | struct nlmsghdr *n, void *arg UNUSED_PARAM)
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215 | {
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216 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
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217 | int len = n->nlmsg_len;
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218 | struct rtattr *rta_tb[IFA_MAX+1];
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219 |
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220 | if (n->nlmsg_type != RTM_NEWADDR && n->nlmsg_type != RTM_DELADDR)
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221 | return 0;
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222 | len -= NLMSG_LENGTH(sizeof(*ifa));
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223 | if (len < 0) {
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224 | bb_error_msg("wrong nlmsg len %d", len);
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225 | return -1;
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226 | }
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227 |
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228 | if (G_filter.flushb && n->nlmsg_type != RTM_NEWADDR)
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229 | return 0;
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230 |
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231 | memset(rta_tb, 0, sizeof(rta_tb));
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232 | parse_rtattr(rta_tb, IFA_MAX, IFA_RTA(ifa), n->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa)));
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233 |
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234 | if (!rta_tb[IFA_LOCAL])
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235 | rta_tb[IFA_LOCAL] = rta_tb[IFA_ADDRESS];
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236 | if (!rta_tb[IFA_ADDRESS])
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237 | rta_tb[IFA_ADDRESS] = rta_tb[IFA_LOCAL];
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238 |
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239 | if (G_filter.ifindex && G_filter.ifindex != ifa->ifa_index)
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240 | return 0;
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241 | if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
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242 | return 0;
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243 | if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
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244 | return 0;
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245 | if (G_filter.label) {
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246 | const char *label;
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247 | if (rta_tb[IFA_LABEL])
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248 | label = RTA_DATA(rta_tb[IFA_LABEL]);
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249 | else
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250 | label = ll_index_to_name(ifa->ifa_index);
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251 | if (fnmatch(G_filter.label, label, 0) != 0)
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252 | return 0;
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253 | }
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254 | if (G_filter.pfx.family) {
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255 | if (rta_tb[IFA_LOCAL]) {
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256 | inet_prefix dst;
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257 | memset(&dst, 0, sizeof(dst));
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258 | dst.family = ifa->ifa_family;
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259 | memcpy(&dst.data, RTA_DATA(rta_tb[IFA_LOCAL]), RTA_PAYLOAD(rta_tb[IFA_LOCAL]));
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260 | if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
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261 | return 0;
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262 | }
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263 | }
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264 |
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265 | if (G_filter.flushb) {
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266 | struct nlmsghdr *fn;
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267 | if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
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268 | if (flush_update())
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269 | return -1;
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270 | }
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271 | fn = (struct nlmsghdr*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
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272 | memcpy(fn, n, n->nlmsg_len);
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273 | fn->nlmsg_type = RTM_DELADDR;
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274 | fn->nlmsg_flags = NLM_F_REQUEST;
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275 | fn->nlmsg_seq = ++G_filter.rth->seq;
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276 | G_filter.flushp = (((char*)fn) + n->nlmsg_len) - G_filter.flushb;
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277 | G_filter.flushed = 1;
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278 | return 0;
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279 | }
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280 |
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281 | if (n->nlmsg_type == RTM_DELADDR)
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282 | printf("Deleted ");
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283 |
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284 | if (G_filter.oneline)
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285 | printf("%u: %s", ifa->ifa_index, ll_index_to_name(ifa->ifa_index));
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286 | if (ifa->ifa_family == AF_INET)
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287 | printf(" inet ");
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288 | else if (ifa->ifa_family == AF_INET6)
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289 | printf(" inet6 ");
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290 | else
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291 | printf(" family %d ", ifa->ifa_family);
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292 |
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293 | if (rta_tb[IFA_LOCAL]) {
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294 | fputs(rt_addr_n2a(ifa->ifa_family, RTA_DATA(rta_tb[IFA_LOCAL])),
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295 | stdout
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296 | );
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297 |
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298 | if (rta_tb[IFA_ADDRESS] == NULL
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299 | || memcmp(RTA_DATA(rta_tb[IFA_ADDRESS]), RTA_DATA(rta_tb[IFA_LOCAL]), 4) == 0
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300 | ) {
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301 | printf("/%d ", ifa->ifa_prefixlen);
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302 | } else {
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303 | printf(" peer %s/%d ",
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304 | rt_addr_n2a(ifa->ifa_family, RTA_DATA(rta_tb[IFA_ADDRESS])),
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305 | ifa->ifa_prefixlen
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306 | );
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307 | }
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308 | }
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309 |
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310 | if (rta_tb[IFA_BROADCAST]) {
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311 | printf("brd %s ",
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312 | rt_addr_n2a(ifa->ifa_family,
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313 | RTA_DATA(rta_tb[IFA_BROADCAST]))
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314 | );
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315 | }
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316 | if (rta_tb[IFA_ANYCAST]) {
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317 | printf("any %s ",
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318 | rt_addr_n2a(ifa->ifa_family,
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319 | RTA_DATA(rta_tb[IFA_ANYCAST]))
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320 | );
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321 | }
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322 | printf("scope %s ", rtnl_rtscope_n2a(ifa->ifa_scope));
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323 | if (ifa->ifa_flags & IFA_F_SECONDARY) {
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324 | ifa->ifa_flags &= ~IFA_F_SECONDARY;
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325 | printf("secondary ");
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326 | }
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327 | if (ifa->ifa_flags & IFA_F_TENTATIVE) {
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328 | ifa->ifa_flags &= ~IFA_F_TENTATIVE;
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329 | printf("tentative ");
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330 | }
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331 | if (ifa->ifa_flags & IFA_F_DEPRECATED) {
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332 | ifa->ifa_flags &= ~IFA_F_DEPRECATED;
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333 | printf("deprecated ");
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334 | }
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335 | if (!(ifa->ifa_flags & IFA_F_PERMANENT)) {
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336 | printf("dynamic ");
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337 | } else
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338 | ifa->ifa_flags &= ~IFA_F_PERMANENT;
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339 | if (ifa->ifa_flags)
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340 | printf("flags %02x ", ifa->ifa_flags);
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341 | if (rta_tb[IFA_LABEL])
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342 | fputs((char*)RTA_DATA(rta_tb[IFA_LABEL]), stdout);
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343 | if (rta_tb[IFA_CACHEINFO]) {
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344 | struct ifa_cacheinfo *ci = RTA_DATA(rta_tb[IFA_CACHEINFO]);
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345 | char buf[128];
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346 | bb_putchar(_SL_);
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347 | if (ci->ifa_valid == 0xFFFFFFFFU)
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348 | sprintf(buf, "valid_lft forever");
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349 | else
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350 | sprintf(buf, "valid_lft %dsec", ci->ifa_valid);
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351 | if (ci->ifa_prefered == 0xFFFFFFFFU)
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352 | sprintf(buf+strlen(buf), " preferred_lft forever");
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353 | else
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354 | sprintf(buf+strlen(buf), " preferred_lft %dsec", ci->ifa_prefered);
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355 | printf(" %s", buf);
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356 | }
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357 | bb_putchar('\n');
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358 | /*fflush_all();*/
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359 | return 0;
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360 | }
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361 |
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362 |
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363 | struct nlmsg_list {
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364 | struct nlmsg_list *next;
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365 | struct nlmsghdr h;
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366 | };
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367 |
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368 | static int print_selected_addrinfo(int ifindex, struct nlmsg_list *ainfo)
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369 | {
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370 | for (; ainfo; ainfo = ainfo->next) {
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371 | struct nlmsghdr *n = &ainfo->h;
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372 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
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373 |
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374 | if (n->nlmsg_type != RTM_NEWADDR)
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375 | continue;
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376 | if (n->nlmsg_len < NLMSG_LENGTH(sizeof(ifa)))
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377 | return -1;
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378 | if (ifa->ifa_index != ifindex
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379 | || (G_filter.family && G_filter.family != ifa->ifa_family)
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380 | ) {
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381 | continue;
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382 | }
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383 | print_addrinfo(NULL, n, NULL);
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384 | }
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385 | return 0;
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386 | }
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387 |
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388 |
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389 | static int FAST_FUNC store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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390 | {
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391 | struct nlmsg_list **linfo = (struct nlmsg_list**)arg;
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392 | struct nlmsg_list *h;
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393 | struct nlmsg_list **lp;
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394 |
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395 | h = xzalloc(n->nlmsg_len + sizeof(void*));
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396 |
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397 | memcpy(&h->h, n, n->nlmsg_len);
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398 | /*h->next = NULL; - xzalloc did it */
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399 |
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400 | for (lp = linfo; *lp; lp = &(*lp)->next)
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401 | continue;
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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(&G_filter, 0, sizeof(G_filter));
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411 | G_filter.oneline = _oneline;
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412 | }
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413 |
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414 | /* Return value becomes exitcode. It's okay to not return at all */
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415 | int FAST_FUNC ipaddr_list_or_flush(char **argv, int flush)
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416 | {
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417 | static const char option[] ALIGN1 = "to\0""scope\0""up\0""label\0""dev\0";
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418 |
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419 | struct nlmsg_list *linfo = NULL;
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420 | struct nlmsg_list *ainfo = NULL;
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421 | struct nlmsg_list *l;
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422 | struct rtnl_handle rth;
|
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423 | char *filter_dev = NULL;
|
---|
424 | int no_link = 0;
|
---|
425 |
|
---|
426 | ipaddr_reset_filter(oneline);
|
---|
427 | G_filter.showqueue = 1;
|
---|
428 |
|
---|
429 | if (G_filter.family == AF_UNSPEC)
|
---|
430 | G_filter.family = preferred_family;
|
---|
431 |
|
---|
432 | if (flush) {
|
---|
433 | if (!*argv) {
|
---|
434 | bb_error_msg_and_die(bb_msg_requires_arg, "flush");
|
---|
435 | }
|
---|
436 | if (G_filter.family == AF_PACKET) {
|
---|
437 | bb_error_msg_and_die("can't flush link addresses");
|
---|
438 | }
|
---|
439 | }
|
---|
440 |
|
---|
441 | while (*argv) {
|
---|
442 | const smalluint key = index_in_strings(option, *argv);
|
---|
443 | if (key == 0) { /* to */
|
---|
444 | NEXT_ARG();
|
---|
445 | get_prefix(&G_filter.pfx, *argv, G_filter.family);
|
---|
446 | if (G_filter.family == AF_UNSPEC) {
|
---|
447 | G_filter.family = G_filter.pfx.family;
|
---|
448 | }
|
---|
449 | } else if (key == 1) { /* scope */
|
---|
450 | uint32_t scope = 0;
|
---|
451 | NEXT_ARG();
|
---|
452 | G_filter.scopemask = -1;
|
---|
453 | if (rtnl_rtscope_a2n(&scope, *argv)) {
|
---|
454 | if (strcmp(*argv, "all") != 0) {
|
---|
455 | invarg_1_to_2(*argv, "scope");
|
---|
456 | }
|
---|
457 | scope = RT_SCOPE_NOWHERE;
|
---|
458 | G_filter.scopemask = 0;
|
---|
459 | }
|
---|
460 | G_filter.scope = scope;
|
---|
461 | } else if (key == 2) { /* up */
|
---|
462 | G_filter.up = 1;
|
---|
463 | } else if (key == 3) { /* label */
|
---|
464 | NEXT_ARG();
|
---|
465 | G_filter.label = *argv;
|
---|
466 | } else {
|
---|
467 | if (key == 4) /* dev */
|
---|
468 | NEXT_ARG();
|
---|
469 | if (filter_dev)
|
---|
470 | duparg2("dev", *argv);
|
---|
471 | filter_dev = *argv;
|
---|
472 | }
|
---|
473 | argv++;
|
---|
474 | }
|
---|
475 |
|
---|
476 | xrtnl_open(&rth);
|
---|
477 |
|
---|
478 | xrtnl_wilddump_request(&rth, preferred_family, RTM_GETLINK);
|
---|
479 | xrtnl_dump_filter(&rth, store_nlmsg, &linfo);
|
---|
480 |
|
---|
481 | if (filter_dev) {
|
---|
482 | G_filter.ifindex = xll_name_to_index(filter_dev);
|
---|
483 | }
|
---|
484 |
|
---|
485 | if (flush) {
|
---|
486 | char flushb[4096-512];
|
---|
487 |
|
---|
488 | G_filter.flushb = flushb;
|
---|
489 | G_filter.flushp = 0;
|
---|
490 | G_filter.flushe = sizeof(flushb);
|
---|
491 | G_filter.rth = &rth;
|
---|
492 |
|
---|
493 | for (;;) {
|
---|
494 | xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
|
---|
495 | G_filter.flushed = 0;
|
---|
496 | xrtnl_dump_filter(&rth, print_addrinfo, NULL);
|
---|
497 | if (G_filter.flushed == 0) {
|
---|
498 | return 0;
|
---|
499 | }
|
---|
500 | if (flush_update() < 0) {
|
---|
501 | return 1;
|
---|
502 | }
|
---|
503 | }
|
---|
504 | }
|
---|
505 |
|
---|
506 | if (G_filter.family != AF_PACKET) {
|
---|
507 | xrtnl_wilddump_request(&rth, G_filter.family, RTM_GETADDR);
|
---|
508 | xrtnl_dump_filter(&rth, store_nlmsg, &ainfo);
|
---|
509 | }
|
---|
510 |
|
---|
511 |
|
---|
512 | if (G_filter.family && G_filter.family != AF_PACKET) {
|
---|
513 | struct nlmsg_list **lp;
|
---|
514 | lp = &linfo;
|
---|
515 |
|
---|
516 | if (G_filter.oneline)
|
---|
517 | no_link = 1;
|
---|
518 |
|
---|
519 | while ((l = *lp) != NULL) {
|
---|
520 | int ok = 0;
|
---|
521 | struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
|
---|
522 | struct nlmsg_list *a;
|
---|
523 |
|
---|
524 | for (a = ainfo; a; a = a->next) {
|
---|
525 | struct nlmsghdr *n = &a->h;
|
---|
526 | struct ifaddrmsg *ifa = NLMSG_DATA(n);
|
---|
527 |
|
---|
528 | if (ifa->ifa_index != ifi->ifi_index
|
---|
529 | || (G_filter.family && G_filter.family != ifa->ifa_family)
|
---|
530 | ) {
|
---|
531 | continue;
|
---|
532 | }
|
---|
533 | if ((G_filter.scope ^ ifa->ifa_scope) & G_filter.scopemask)
|
---|
534 | continue;
|
---|
535 | if ((G_filter.flags ^ ifa->ifa_flags) & G_filter.flagmask)
|
---|
536 | continue;
|
---|
537 | if (G_filter.pfx.family || G_filter.label) {
|
---|
538 | struct rtattr *tb[IFA_MAX+1];
|
---|
539 | memset(tb, 0, sizeof(tb));
|
---|
540 | parse_rtattr(tb, IFA_MAX, IFA_RTA(ifa), IFA_PAYLOAD(n));
|
---|
541 | if (!tb[IFA_LOCAL])
|
---|
542 | tb[IFA_LOCAL] = tb[IFA_ADDRESS];
|
---|
543 |
|
---|
544 | if (G_filter.pfx.family && tb[IFA_LOCAL]) {
|
---|
545 | inet_prefix dst;
|
---|
546 | memset(&dst, 0, sizeof(dst));
|
---|
547 | dst.family = ifa->ifa_family;
|
---|
548 | memcpy(&dst.data, RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_LOCAL]));
|
---|
549 | if (inet_addr_match(&dst, &G_filter.pfx, G_filter.pfx.bitlen))
|
---|
550 | continue;
|
---|
551 | }
|
---|
552 | if (G_filter.label) {
|
---|
553 | const char *label;
|
---|
554 | if (tb[IFA_LABEL])
|
---|
555 | label = RTA_DATA(tb[IFA_LABEL]);
|
---|
556 | else
|
---|
557 | label = ll_index_to_name(ifa->ifa_index);
|
---|
558 | if (fnmatch(G_filter.label, label, 0) != 0)
|
---|
559 | continue;
|
---|
560 | }
|
---|
561 | }
|
---|
562 |
|
---|
563 | ok = 1;
|
---|
564 | break;
|
---|
565 | }
|
---|
566 | if (!ok)
|
---|
567 | *lp = l->next;
|
---|
568 | else
|
---|
569 | lp = &l->next;
|
---|
570 | }
|
---|
571 | }
|
---|
572 |
|
---|
573 | for (l = linfo; l; l = l->next) {
|
---|
574 | if (no_link || print_linkinfo(&l->h) == 0) {
|
---|
575 | struct ifinfomsg *ifi = NLMSG_DATA(&l->h);
|
---|
576 | if (G_filter.family != AF_PACKET)
|
---|
577 | print_selected_addrinfo(ifi->ifi_index, ainfo);
|
---|
578 | }
|
---|
579 | }
|
---|
580 |
|
---|
581 | return 0;
|
---|
582 | }
|
---|
583 |
|
---|
584 | static int default_scope(inet_prefix *lcl)
|
---|
585 | {
|
---|
586 | if (lcl->family == AF_INET) {
|
---|
587 | if (lcl->bytelen >= 1 && *(uint8_t*)&lcl->data == 127)
|
---|
588 | return RT_SCOPE_HOST;
|
---|
589 | }
|
---|
590 | return 0;
|
---|
591 | }
|
---|
592 |
|
---|
593 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
594 | static int ipaddr_modify(int cmd, int flags, char **argv)
|
---|
595 | {
|
---|
596 | static const char option[] ALIGN1 =
|
---|
597 | "peer\0""remote\0""broadcast\0""brd\0"
|
---|
598 | "anycast\0""scope\0""dev\0""label\0""local\0";
|
---|
599 | struct rtnl_handle rth;
|
---|
600 | struct {
|
---|
601 | struct nlmsghdr n;
|
---|
602 | struct ifaddrmsg ifa;
|
---|
603 | char buf[256];
|
---|
604 | } req;
|
---|
605 | char *d = NULL;
|
---|
606 | char *l = NULL;
|
---|
607 | inet_prefix lcl;
|
---|
608 | inet_prefix peer;
|
---|
609 | int local_len = 0;
|
---|
610 | int peer_len = 0;
|
---|
611 | int brd_len = 0;
|
---|
612 | int any_len = 0;
|
---|
613 | bool scoped = 0;
|
---|
614 |
|
---|
615 | memset(&req, 0, sizeof(req));
|
---|
616 |
|
---|
617 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
|
---|
618 | req.n.nlmsg_flags = NLM_F_REQUEST | flags;
|
---|
619 | req.n.nlmsg_type = cmd;
|
---|
620 | req.ifa.ifa_family = preferred_family;
|
---|
621 |
|
---|
622 | while (*argv) {
|
---|
623 | unsigned arg = index_in_strings(option, *argv);
|
---|
624 | /* if search fails, "local" is assumed */
|
---|
625 | if ((int)arg >= 0)
|
---|
626 | NEXT_ARG();
|
---|
627 |
|
---|
628 | if (arg <= 1) { /* peer, remote */
|
---|
629 | if (peer_len) {
|
---|
630 | duparg("peer", *argv);
|
---|
631 | }
|
---|
632 | get_prefix(&peer, *argv, req.ifa.ifa_family);
|
---|
633 | peer_len = peer.bytelen;
|
---|
634 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
635 | req.ifa.ifa_family = peer.family;
|
---|
636 | }
|
---|
637 | addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen);
|
---|
638 | req.ifa.ifa_prefixlen = peer.bitlen;
|
---|
639 | } else if (arg <= 3) { /* broadcast, brd */
|
---|
640 | inet_prefix addr;
|
---|
641 | if (brd_len) {
|
---|
642 | duparg("broadcast", *argv);
|
---|
643 | }
|
---|
644 | if (LONE_CHAR(*argv, '+')) {
|
---|
645 | brd_len = -1;
|
---|
646 | } else if (LONE_DASH(*argv)) {
|
---|
647 | brd_len = -2;
|
---|
648 | } else {
|
---|
649 | get_addr(&addr, *argv, req.ifa.ifa_family);
|
---|
650 | if (req.ifa.ifa_family == AF_UNSPEC)
|
---|
651 | req.ifa.ifa_family = addr.family;
|
---|
652 | addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen);
|
---|
653 | brd_len = addr.bytelen;
|
---|
654 | }
|
---|
655 | } else if (arg == 4) { /* anycast */
|
---|
656 | inet_prefix addr;
|
---|
657 | if (any_len) {
|
---|
658 | duparg("anycast", *argv);
|
---|
659 | }
|
---|
660 | get_addr(&addr, *argv, req.ifa.ifa_family);
|
---|
661 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
662 | req.ifa.ifa_family = addr.family;
|
---|
663 | }
|
---|
664 | addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen);
|
---|
665 | any_len = addr.bytelen;
|
---|
666 | } else if (arg == 5) { /* scope */
|
---|
667 | uint32_t scope = 0;
|
---|
668 | if (rtnl_rtscope_a2n(&scope, *argv)) {
|
---|
669 | invarg_1_to_2(*argv, "scope");
|
---|
670 | }
|
---|
671 | req.ifa.ifa_scope = scope;
|
---|
672 | scoped = 1;
|
---|
673 | } else if (arg == 6) { /* dev */
|
---|
674 | d = *argv;
|
---|
675 | } else if (arg == 7) { /* label */
|
---|
676 | l = *argv;
|
---|
677 | addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l) + 1);
|
---|
678 | } else {
|
---|
679 | /* local (specified or assumed) */
|
---|
680 | if (local_len) {
|
---|
681 | duparg2("local", *argv);
|
---|
682 | }
|
---|
683 | get_prefix(&lcl, *argv, req.ifa.ifa_family);
|
---|
684 | if (req.ifa.ifa_family == AF_UNSPEC) {
|
---|
685 | req.ifa.ifa_family = lcl.family;
|
---|
686 | }
|
---|
687 | addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen);
|
---|
688 | local_len = lcl.bytelen;
|
---|
689 | }
|
---|
690 | argv++;
|
---|
691 | }
|
---|
692 |
|
---|
693 | if (!d) {
|
---|
694 | /* There was no "dev IFACE", but we need that */
|
---|
695 | bb_error_msg_and_die("need \"dev IFACE\"");
|
---|
696 | }
|
---|
697 | if (l && !is_prefixed_with(l, d)) {
|
---|
698 | bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l);
|
---|
699 | }
|
---|
700 |
|
---|
701 | if (peer_len == 0 && local_len && cmd != RTM_DELADDR) {
|
---|
702 | peer = lcl;
|
---|
703 | addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen);
|
---|
704 | }
|
---|
705 | if (req.ifa.ifa_prefixlen == 0)
|
---|
706 | req.ifa.ifa_prefixlen = lcl.bitlen;
|
---|
707 |
|
---|
708 | if (brd_len < 0 && cmd != RTM_DELADDR) {
|
---|
709 | inet_prefix brd;
|
---|
710 | int i;
|
---|
711 | if (req.ifa.ifa_family != AF_INET) {
|
---|
712 | bb_error_msg_and_die("broadcast can be set only for IPv4 addresses");
|
---|
713 | }
|
---|
714 | brd = peer;
|
---|
715 | if (brd.bitlen <= 30) {
|
---|
716 | for (i = 31; i >= brd.bitlen; i--) {
|
---|
717 | if (brd_len == -1)
|
---|
718 | brd.data[0] |= htonl(1<<(31-i));
|
---|
719 | else
|
---|
720 | brd.data[0] &= ~htonl(1<<(31-i));
|
---|
721 | }
|
---|
722 | addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen);
|
---|
723 | brd_len = brd.bytelen;
|
---|
724 | }
|
---|
725 | }
|
---|
726 | if (!scoped && cmd != RTM_DELADDR)
|
---|
727 | req.ifa.ifa_scope = default_scope(&lcl);
|
---|
728 |
|
---|
729 | xrtnl_open(&rth);
|
---|
730 |
|
---|
731 | ll_init_map(&rth);
|
---|
732 |
|
---|
733 | req.ifa.ifa_index = xll_name_to_index(d);
|
---|
734 |
|
---|
735 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
|
---|
736 | return 2;
|
---|
737 |
|
---|
738 | return 0;
|
---|
739 | }
|
---|
740 |
|
---|
741 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
742 | int FAST_FUNC do_ipaddr(char **argv)
|
---|
743 | {
|
---|
744 | static const char commands[] ALIGN1 =
|
---|
745 | /* 0 1 2 3 4 5 6 7 8 */
|
---|
746 | "add\0""change\0""chg\0""replace\0""delete\0""list\0""show\0""lst\0""flush\0";
|
---|
747 | int cmd = 2;
|
---|
748 |
|
---|
749 | INIT_G();
|
---|
750 |
|
---|
751 | if (*argv) {
|
---|
752 | cmd = index_in_substrings(commands, *argv);
|
---|
753 | if (cmd < 0)
|
---|
754 | invarg_1_to_2(*argv, applet_name);
|
---|
755 | argv++;
|
---|
756 | if (cmd <= 4) {
|
---|
757 | return ipaddr_modify(
|
---|
758 | /*cmd:*/ cmd == 4 ? RTM_DELADDR : RTM_NEWADDR,
|
---|
759 | /*flags:*/
|
---|
760 | cmd == 0 ? NLM_F_CREATE|NLM_F_EXCL : /* add */
|
---|
761 | cmd == 1 || cmd == 2 ? NLM_F_REPLACE : /* change */
|
---|
762 | cmd == 3 ? NLM_F_CREATE|NLM_F_REPLACE : /* replace */
|
---|
763 | 0 /* delete */
|
---|
764 | , argv);
|
---|
765 | }
|
---|
766 | }
|
---|
767 | return ipaddr_list_or_flush(argv, cmd == 8);
|
---|
768 | }
|
---|