networking/ip.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   4  *
   5  * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
   6  *
   7  * Changes:
   8  * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
   9  * Bernhard Reutner-Fischer rewrote to use index_in_substr_array
  10  */
  11 //config:config IP
  12 //config:       bool "ip"
  13 //config:       default y
  14 //config:       select PLATFORM_LINUX
  15 //config:       help
  16 //config:         The "ip" applet is a TCP/IP interface configuration and routing
  17 //config:         utility. You generally don't need "ip" to use busybox with
  18 //config:         TCP/IP.
  19 //config:
  20 //config:config IPADDR
  21 //config:       bool "ipaddr"
  22 //config:       default y
  23 //config:       select FEATURE_IP_ADDRESS
  24 //config:       select PLATFORM_LINUX
  25 //config:       help
  26 //config:         Support short form of ip addr: ipaddr
  27 //config:
  28 //config:config IPLINK
  29 //config:       bool "iplink"
  30 //config:       default y
  31 //config:       select FEATURE_IP_LINK
  32 //config:       select PLATFORM_LINUX
  33 //config:       help
  34 //config:         Support short form of ip link: iplink
  35 //config:
  36 //config:config IPROUTE
  37 //config:       bool "iproute"
  38 //config:       default y
  39 //config:       select FEATURE_IP_ROUTE
  40 //config:       select PLATFORM_LINUX
  41 //config:       help
  42 //config:         Support short form of ip route: iproute
  43 //config:
  44 //config:config IPTUNNEL
  45 //config:       bool "iptunnel"
  46 //config:       default y
  47 //config:       select FEATURE_IP_TUNNEL
  48 //config:       select PLATFORM_LINUX
  49 //config:       help
  50 //config:         Support short form of ip tunnel: iptunnel
  51 //config:
  52 //config:config IPRULE
  53 //config:       bool "iprule"
  54 //config:       default y
  55 //config:       select FEATURE_IP_RULE
  56 //config:       select PLATFORM_LINUX
  57 //config:       help
  58 //config:         Support short form of ip rule: iprule
  59 //config:
  60 //config:config IPNEIGH
  61 //config:       bool "ipneigh"
  62 //config:       default y
  63 //config:       select FEATURE_IP_NEIGH
  64 //config:       select PLATFORM_LINUX
  65 //config:       help
  66 //config:         Support short form of ip neigh: ipneigh
  67 //config:
  68 //config:config FEATURE_IP_ADDRESS
  69 //config:       bool "ip address"
  70 //config:       default y
  71 //config:       depends on IP || IPADDR
  72 //config:       help
  73 //config:         Address manipulation support for the "ip" applet.
  74 //config:
  75 //config:config FEATURE_IP_LINK
  76 //config:       bool "ip link"
  77 //config:       default y
  78 //config:       depends on IP || IPLINK
  79 //config:       help
  80 //config:         Configure network devices with "ip".
  81 //config:
  82 //config:config FEATURE_IP_ROUTE
  83 //config:       bool "ip route"
  84 //config:       default y
  85 //config:       depends on IP || IPROUTE
  86 //config:       help
  87 //config:         Add support for routing table management to "ip".
  88 //config:
  89 //config:config FEATURE_IP_ROUTE_DIR
  90 //config:       string "ip route configuration directory"
  91 //config:       default "/etc/iproute2"
  92 //config:       depends on FEATURE_IP_ROUTE
  93 //config:       help
  94 //config:         Location of the "ip" applet routing configuration.
  95 //config:
  96 //config:config FEATURE_IP_TUNNEL
  97 //config:       bool "ip tunnel"
  98 //config:       default y
  99 //config:       depends on IP || IPTUNNEL
 100 //config:       help
 101 //config:         Add support for tunneling commands to "ip".
 102 //config:
 103 //config:config FEATURE_IP_RULE
 104 //config:       bool "ip rule"
 105 //config:       default y
 106 //config:       depends on IP || IPRULE
 107 //config:       help
 108 //config:         Add support for rule commands to "ip".
 109 //config:
 110 //config:config FEATURE_IP_NEIGH
 111 //config:       bool "ip neighbor"
 112 //config:       default y
 113 //config:       depends on IP || IPNEIGH
 114 //config:       help
 115 //config:         Add support for neighbor commands to "ip".
 116 //config:
 117 //config:config FEATURE_IP_RARE_PROTOCOLS
 118 //config:       bool "Support displaying rarely used link types"
 119 //config:       default n
 120 //config:       depends on IP || IPADDR || IPLINK || IPROUTE || IPTUNNEL || IPRULE || IPNEIGH
 121 //config:       help
 122 //config:         If you are not going to use links of type "frad", "econet",
 123 //config:         "bif" etc, you probably don't need to enable this.
 124 //config:         Ethernet, wireless, infrared, ppp/slip, ip tunnelling
 125 //config:         link types are supported without this option selected.
 126
 127 //applet:IF_IP(APPLET(ip, BB_DIR_SBIN, BB_SUID_DROP))
 128 //applet:IF_IPADDR(APPLET(ipaddr, BB_DIR_SBIN, BB_SUID_DROP))
 129 //applet:IF_IPLINK(APPLET(iplink, BB_DIR_SBIN, BB_SUID_DROP))
 130 //applet:IF_IPROUTE(APPLET(iproute, BB_DIR_SBIN, BB_SUID_DROP))
 131 //applet:IF_IPRULE(APPLET(iprule, BB_DIR_SBIN, BB_SUID_DROP))
 132 //applet:IF_IPTUNNEL(APPLET(iptunnel, BB_DIR_SBIN, BB_SUID_DROP))
 133 //applet:IF_IPNEIGH(APPLET(ipneigh, BB_DIR_SBIN, BB_SUID_DROP))
 134
 135 //kbuild:lib-$(CONFIG_IP) += ip.o
 136 //kbuild:lib-$(CONFIG_IPADDR) += ip.o
 137 //kbuild:lib-$(CONFIG_IPLINK) += ip.o
 138 //kbuild:lib-$(CONFIG_IPROUTE) += ip.o
 139 //kbuild:lib-$(CONFIG_IPRULE) += ip.o
 140 //kbuild:lib-$(CONFIG_IPTUNNEL) += ip.o
 141 //kbuild:lib-$(CONFIG_IPNEIGH) += ip.o
 142
 143 //usage:#define ipaddr_trivial_usage
 144 //usage:       "add|del IFADDR dev IFACE | show|flush [dev IFACE] [to PREFIX]"
 145 //usage:#define ipaddr_full_usage "\n\n"
 146 //usage:       "ipaddr add|change|replace|delete IFADDR dev IFACE\n"
 147 //usage:       "ipaddr show|flush [dev IFACE] [scope SCOPE-ID]\n"
 148 //usage:       "                [to PREFIX] [label PATTERN]\n"
 149 //usage:       "        IFADDR := PREFIX | ADDR peer PREFIX\n"
 150 //usage:       "                [broadcast ADDR] [anycast ADDR]\n"
 151 //usage:       "                [label STRING] [scope SCOPE-ID]\n"
 152 //usage:       "        SCOPE-ID := [host|link|global|NUMBER]"
 153 //usage:
 154 //usage:#define iplink_trivial_usage
 155 //usage:       "set IFACE [up|down] [arp on|off] | show [IFACE]"
 156 //usage:#define iplink_full_usage "\n\n"
 157 //usage:       "iplink set IFACE [up|down]\n"
 158 //usage:       "        [arp on|off]\n"
 159 //usage:       "        [dynamic on|off]\n"
 160 //usage:       "        [multicast on|off]\n"
 161 //usage:       "        [mtu MTU]\n"
 162 //usage:       "iplink show [IFACE]"
 163 //usage:
 164 //usage:#define iproute_trivial_usage
 165 //usage:       "list|flush|add|del|change|append|replace|test ROUTE"
 166 //usage:#define iproute_full_usage "\n\n"
 167 //usage:       "iproute list|flush SELECTOR\n"
 168 //usage:       "iproute get ADDRESS [from ADDRESS iif STRING]\n"
 169 //usage:       "        [oif STRING] [tos TOS]\n"
 170 //usage:       "iproute add|del|change|append|replace|test ROUTE\n"
 171 //usage:       "        SELECTOR := [root PREFIX] [match PREFIX] [proto RTPROTO]\n"
 172 //usage:       "        ROUTE := [TYPE] PREFIX [tos TOS] [proto RTPROTO] [metric METRIC]"
 173 //usage:
 174 //usage:#define iprule_trivial_usage
 175 //usage:       "[list] | add|del SELECTOR ACTION"
 176 //usage:#define iprule_full_usage "\n\n"
 177 //usage:       "        SELECTOR := [from PREFIX] [to PREFIX] [tos TOS] [fwmark FWMARK]\n"
 178 //usage:       "                        [dev IFACE] [pref NUMBER]\n"
 179 //usage:       "        ACTION := [table TABLE_ID] [nat ADDRESS]\n"
 180 //usage:       "                        [prohibit|reject|unreachable]\n"
 181 //usage:       "                        [realms [SRCREALM/]DSTREALM]\n"
 182 //usage:       "        TABLE_ID := [local|main|default|NUMBER]"
 183 //usage:
 184 //usage:#define iptunnel_trivial_usage
 185 //usage:       "add|change|del|show [NAME]\n"
 186 //usage:       "        [mode ipip|gre|sit]\n"
 187 //usage:       "        [remote ADDR] [local ADDR] [ttl TTL]"
 188 //usage:#define iptunnel_full_usage "\n\n"
 189 //usage:       "iptunnel add|change|del|show [NAME]\n"
 190 //usage:       "        [mode ipip|gre|sit] [remote ADDR] [local ADDR]\n"
 191 //usage:       "        [[i|o]seq] [[i|o]key KEY] [[i|o]csum]\n"
 192 //usage:       "        [ttl TTL] [tos TOS] [[no]pmtudisc] [dev PHYS_DEV]"
 193 //usage:
 194 //usage:#define ipneigh_trivial_usage
 195 //usage:       "show|flush [to PREFIX] [dev DEV] [nud STATE]"
 196 //usage:#define ipneigh_full_usage ""
 197 //usage:
 198 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE
 199 //usage:# define IP_BAR_LINK   "|"
 200 //usage:#else
 201 //usage:# define IP_BAR_LINK   ""
 202 //usage:#endif
 203 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK
 204 //usage:# define IP_BAR_TUNNEL "|"
 205 //usage:#else
 206 //usage:# define IP_BAR_TUNNEL ""
 207 //usage:#endif
 208 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK || ENABLE_FEATURE_IP_TUNNEL
 209 //usage:# define IP_BAR_NEIGH  "|"
 210 //usage:#else
 211 //usage:# define IP_BAR_NEIGH  ""
 212 //usage:#endif
 213 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK || ENABLE_FEATURE_IP_TUNNEL || ENABLE_FEATURE_IP_NEIGH
 214 //usage:# define IP_BAR_RULE   "|"
 215 //usage:#else
 216 //usage:# define IP_BAR_RULE   ""
 217 //usage:#endif
 218 //usage:
 219 //usage:#define ip_trivial_usage
 220 //usage:       "[OPTIONS] "
 221 //usage:        IF_FEATURE_IP_ADDRESS("address")
 222 //usage:        IF_FEATURE_IP_ROUTE(  IF_FEATURE_IP_ADDRESS("|")"route")
 223 //usage:        IF_FEATURE_IP_LINK(   IP_BAR_LINK  "link")
 224 //usage:        IF_FEATURE_IP_TUNNEL( IP_BAR_TUNNEL"tunnel")
 225 //usage:        IF_FEATURE_IP_NEIGH(  IP_BAR_NEIGH "neigh")
 226 //usage:        IF_FEATURE_IP_RULE(   IP_BAR_RULE  "rule")
 227 //usage:       " [COMMAND]"
 228 //usage:#define ip_full_usage "\n\n"
 229 //usage:       "OPTIONS := -f[amily] inet|inet6|link | -o[neline]\n"
 230 //usage:       "COMMAND :="
 231 //usage:        IF_FEATURE_IP_ADDRESS("\n"
 232 //usage:        "ip addr "ipaddr_trivial_usage)
 233 //usage:        IF_FEATURE_IP_ROUTE("\n"
 234 //usage:        "ip route "iproute_trivial_usage)
 235 //usage:        IF_FEATURE_IP_LINK("\n"
 236 //usage:        "ip link "iplink_trivial_usage)
 237 //usage:        IF_FEATURE_IP_TUNNEL("\n"
 238 //usage:        "ip tunnel "iptunnel_trivial_usage)
 239 //usage:        IF_FEATURE_IP_NEIGH("\n"
 240 //usage:        "ip neigh "ipneigh_trivial_usage)
 241 //usage:        IF_FEATURE_IP_RULE("\n"
 242 //usage:        "ip rule "iprule_trivial_usage)
 243
 244 #include "libbb.h"
 245
 246 #include "libiproute/utils.h"
 247 #include "libiproute/ip_common.h"
 248
 249 typedef int FAST_FUNC (*ip_func_ptr_t)(char**);
 250
 251 #if ENABLE_IPADDR \
 252  || ENABLE_IPLINK \
 253  || ENABLE_IPROUTE \
 254  || ENABLE_IPRULE \
 255  || ENABLE_IPTUNNEL \
 256  || ENABLE_IPNEIGH
 257 static int ip_do(ip_func_ptr_t ip_func, char **argv)
 258 {
 259         argv = ip_parse_common_args(argv + 1);
 260         return ip_func(argv);
 261 }
 262 #endif
 263
 264 #if ENABLE_IPADDR
 265 int ipaddr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 266 int ipaddr_main(int argc UNUSED_PARAM, char **argv)
 267 {
 268         return ip_do(do_ipaddr, argv);
 269 }
 270 #endif
 271 #if ENABLE_IPLINK
 272 int iplink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 273 int iplink_main(int argc UNUSED_PARAM, char **argv)
 274 {
 275         return ip_do(do_iplink, argv);
 276 }
 277 #endif
 278 #if ENABLE_IPROUTE
 279 int iproute_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 280 int iproute_main(int argc UNUSED_PARAM, char **argv)
 281 {
 282         return ip_do(do_iproute, argv);
 283 }
 284 #endif
 285 #if ENABLE_IPRULE
 286 int iprule_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 287 int iprule_main(int argc UNUSED_PARAM, char **argv)
 288 {
 289         return ip_do(do_iprule, argv);
 290 }
 291 #endif
 292 #if ENABLE_IPTUNNEL
 293 int iptunnel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 294 int iptunnel_main(int argc UNUSED_PARAM, char **argv)
 295 {
 296         return ip_do(do_iptunnel, argv);
 297 }
 298 #endif
 299 #if ENABLE_IPNEIGH
 300 int ipneigh_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 301 int ipneigh_main(int argc UNUSED_PARAM, char **argv)
 302 {
 303         return ip_do(do_ipneigh, argv);
 304 }
 305 #endif
 306
 307 #if ENABLE_IP
 308 static int FAST_FUNC ip_print_help(char **argv UNUSED_PARAM)
 309 {
 310         bb_show_usage();
 311 }
 312
 313 int ip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 314 int ip_main(int argc UNUSED_PARAM, char **argv)
 315 {
 316         static const char keywords[] ALIGN1 = ""
 317                 IF_FEATURE_IP_ADDRESS("address\0")
 318                 IF_FEATURE_IP_ROUTE("route\0")
 319                 IF_FEATURE_IP_ROUTE("r\0")
 320                 IF_FEATURE_IP_LINK("link\0")
 321                 IF_FEATURE_IP_TUNNEL("tunnel\0")
 322                 IF_FEATURE_IP_TUNNEL("tunl\0")
 323                 IF_FEATURE_IP_RULE("rule\0")
 324                 IF_FEATURE_IP_NEIGH("neigh\0")
 325                 ;
 326         static const ip_func_ptr_t ip_func_ptrs[] = {
 327                 ip_print_help,
 328                 IF_FEATURE_IP_ADDRESS(do_ipaddr,)
 329                 IF_FEATURE_IP_ROUTE(do_iproute,)
 330                 IF_FEATURE_IP_ROUTE(do_iproute,)
 331                 IF_FEATURE_IP_LINK(do_iplink,)
 332                 IF_FEATURE_IP_TUNNEL(do_iptunnel,)
 333                 IF_FEATURE_IP_TUNNEL(do_iptunnel,)
 334                 IF_FEATURE_IP_RULE(do_iprule,)
 335                 IF_FEATURE_IP_NEIGH(do_ipneigh,)
 336         };
 337         ip_func_ptr_t ip_func;
 338         int key;
 339
 340         argv = ip_parse_common_args(argv + 1);
 341         if (ARRAY_SIZE(ip_func_ptrs) > 1 && *argv)
 342                 key = index_in_substrings(keywords, *argv++);
 343         else
 344                 key = -1;
 345         ip_func = ip_func_ptrs[key + 1];
 346
 347         return ip_func(argv);
 348 }
 349 #endif