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] [arp on|off] [multicast on|off] [promisc on|off]\n"
 158 //usage:       "        [mtu NUM] [name NAME] [qlen NUM] [address MAC]\n"
 159 //usage:       "iplink show [IFACE]"
 160 //usage:
 161 //usage:#define iproute_trivial_usage
 162 //usage:       "list|flush|add|del|change|append|replace|test ROUTE"
 163 //usage:#define iproute_full_usage "\n\n"
 164 //usage:       "iproute list|flush SELECTOR\n"
 165 //usage:       "        SELECTOR := [root PREFIX] [match PREFIX] [proto RTPROTO]\n"
 166 //usage:       "        PREFIX := default|ADDRESS/MASK\n"
 167 //usage:       "iproute get ADDRESS [from ADDRESS iif IFACE]\n"
 168 //usage:       "        [oif IFACE] [tos TOS]\n"
 169 //usage:       "iproute add|del|change|append|replace|test ROUTE\n"
 170 //usage:       "        ROUTE := NODE_SPEC [INFO_SPEC]\n"
 171 //usage:       "        NODE_SPEC := PREFIX"IF_FEATURE_IP_RULE(" [table TABLE_ID]")" [proto RTPROTO] [scope SCOPE] [metric METRIC]\n"
 172 //usage:       "        INFO_SPEC := NH OPTIONS\n"
 173 //usage:       "        NH := [via [inet|inet6] ADDRESS] [dev IFACE] [src ADDRESS] [onlink]\n"
 174 //usage:       "        OPTIONS := [mtu NUM]"
 175 //upstream man ip-route:
 176 //======================
 177 //ip route { show | flush } SELECTOR
 178 //ip route save SELECTOR
 179 //ip route restore
 180 //ip route get ADDRESS [ from ADDRESS iif STRING  ] [ oif STRING ] [ tos TOS ]
 181 //ip route { add | del | change | append | replace } ROUTE
 182 //SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ] [ table TABLE_ID ] [ proto RTPROTO ] [ type TYPE ] [ scope SCOPE ]
 183 //ROUTE := NODE_SPEC [ INFO_SPEC ]
 184 //NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ] [ table TABLE_ID ] [ proto RTPROTO ] [ scope SCOPE ] [ metric METRIC ]
 185 //INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ] ...
 186 //NH := [ encap ENCAP ] [ via [ FAMILY ] ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS
 187 // ..............................................................^ I guess [src ADDRESS] should be here
 188 //FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]
 189 //OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ] rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ] [ window NUMBER ] [ cwnd NUMBER ] [ ssthresh REALM ] [ realms REALM ]
 190 //        [ rto_min TIME ] [ initcwnd NUMBER ] [ initrwnd NUMBER ] [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ] [ pref PREF ] [ expires TIME ]
 191 //TYPE := [ unicast | local | broadcast | multicast | throw | unreachable | prohibit | blackhole | nat ]
 192 //TABLE_ID := [ local | main | default | all | NUMBER ]
 193 //SCOPE := [ host | link | global | NUMBER ]
 194 //NHFLAGS := [ onlink | pervasive ]
 195 //RTPROTO := [ kernel | boot | static | NUMBER ]
 196 //FEATURES := [ ecn | ]
 197 //PREF := [ low | medium | high ]
 198 //ENCAP := [ MPLS | IP ]
 199 //ENCAP_MPLS := mpls [ LABEL ]
 200 //ENCAP_IP := ip id TUNNEL_ID dst REMOTE_IP [ tos TOS ] [ ttl TTL ]
 201 //usage:
 202 //usage:#define iprule_trivial_usage
 203 //usage:       "[list] | add|del SELECTOR ACTION"
 204 //usage:#define iprule_full_usage "\n\n"
 205 //usage:       "        SELECTOR := [from PREFIX] [to PREFIX] [tos TOS] [fwmark FWMARK]\n"
 206 //usage:       "                        [dev IFACE] [pref NUMBER]\n"
 207 //usage:       "        ACTION := [table TABLE_ID] [nat ADDRESS]\n"
 208 //usage:       "                        [prohibit|reject|unreachable]\n"
 209 //usage:       "                        [realms [SRCREALM/]DSTREALM]\n"
 210 //usage:       "        TABLE_ID := [local|main|default|NUMBER]"
 211 //usage:
 212 //usage:#define iptunnel_trivial_usage
 213 //usage:       "add|change|del|show [NAME]\n"
 214 //usage:       "        [mode ipip|gre|sit]\n"
 215 //usage:       "        [remote ADDR] [local ADDR] [ttl TTL]"
 216 //usage:#define iptunnel_full_usage "\n\n"
 217 //usage:       "iptunnel add|change|del|show [NAME]\n"
 218 //usage:       "        [mode ipip|gre|sit] [remote ADDR] [local ADDR]\n"
 219 //usage:       "        [[i|o]seq] [[i|o]key KEY] [[i|o]csum]\n"
 220 //usage:       "        [ttl TTL] [tos TOS] [[no]pmtudisc] [dev PHYS_DEV]"
 221 //usage:
 222 //usage:#define ipneigh_trivial_usage
 223 //usage:       "show|flush [to PREFIX] [dev DEV] [nud STATE]"
 224 //usage:#define ipneigh_full_usage ""
 225 //usage:
 226 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE
 227 //usage:# define IP_BAR_LINK   "|"
 228 //usage:#else
 229 //usage:# define IP_BAR_LINK   ""
 230 //usage:#endif
 231 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK
 232 //usage:# define IP_BAR_TUNNEL "|"
 233 //usage:#else
 234 //usage:# define IP_BAR_TUNNEL ""
 235 //usage:#endif
 236 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK || ENABLE_FEATURE_IP_TUNNEL
 237 //usage:# define IP_BAR_NEIGH  "|"
 238 //usage:#else
 239 //usage:# define IP_BAR_NEIGH  ""
 240 //usage:#endif
 241 //usage:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK || ENABLE_FEATURE_IP_TUNNEL || ENABLE_FEATURE_IP_NEIGH
 242 //usage:# define IP_BAR_RULE   "|"
 243 //usage:#else
 244 //usage:# define IP_BAR_RULE   ""
 245 //usage:#endif
 246 //usage:
 247 //usage:#define ip_trivial_usage
 248 //usage:       "[OPTIONS] "
 249 //usage:        IF_FEATURE_IP_ADDRESS("address")
 250 //usage:        IF_FEATURE_IP_ROUTE(  IF_FEATURE_IP_ADDRESS("|")"route")
 251 //usage:        IF_FEATURE_IP_LINK(   IP_BAR_LINK  "link")
 252 //usage:        IF_FEATURE_IP_TUNNEL( IP_BAR_TUNNEL"tunnel")
 253 //usage:        IF_FEATURE_IP_NEIGH(  IP_BAR_NEIGH "neigh")
 254 //usage:        IF_FEATURE_IP_RULE(   IP_BAR_RULE  "rule")
 255 //usage:       " [COMMAND]"
 256 //usage:#define ip_full_usage "\n\n"
 257 //usage:       "OPTIONS := -f[amily] inet|inet6|link | -o[neline]\n"
 258 //usage:       "COMMAND :="
 259 //usage:        IF_FEATURE_IP_ADDRESS("\n"
 260 //usage:        "ip addr "ipaddr_trivial_usage)
 261 //usage:        IF_FEATURE_IP_ROUTE("\n"
 262 //usage:        "ip route "iproute_trivial_usage)
 263 //usage:        IF_FEATURE_IP_LINK("\n"
 264 //usage:        "ip link "iplink_trivial_usage)
 265 //usage:        IF_FEATURE_IP_TUNNEL("\n"
 266 //usage:        "ip tunnel "iptunnel_trivial_usage)
 267 //usage:        IF_FEATURE_IP_NEIGH("\n"
 268 //usage:        "ip neigh "ipneigh_trivial_usage)
 269 //usage:        IF_FEATURE_IP_RULE("\n"
 270 //usage:        "ip rule "iprule_trivial_usage)
 271
 272 #include "libbb.h"
 273
 274 #include "libiproute/utils.h"
 275 #include "libiproute/ip_common.h"
 276
 277 typedef int FAST_FUNC (*ip_func_ptr_t)(char**);
 278
 279 #if ENABLE_IPADDR \
 280  || ENABLE_IPLINK \
 281  || ENABLE_IPROUTE \
 282  || ENABLE_IPRULE \
 283  || ENABLE_IPTUNNEL \
 284  || ENABLE_IPNEIGH
 285 static int ip_do(ip_func_ptr_t ip_func, char **argv)
 286 {
 287         argv = ip_parse_common_args(argv + 1);
 288         return ip_func(argv);
 289 }
 290 #endif
 291
 292 #if ENABLE_IPADDR
 293 int ipaddr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 294 int ipaddr_main(int argc UNUSED_PARAM, char **argv)
 295 {
 296         return ip_do(do_ipaddr, argv);
 297 }
 298 #endif
 299 #if ENABLE_IPLINK
 300 int iplink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 301 int iplink_main(int argc UNUSED_PARAM, char **argv)
 302 {
 303         return ip_do(do_iplink, argv);
 304 }
 305 #endif
 306 #if ENABLE_IPROUTE
 307 int iproute_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 308 int iproute_main(int argc UNUSED_PARAM, char **argv)
 309 {
 310         return ip_do(do_iproute, argv);
 311 }
 312 #endif
 313 #if ENABLE_IPRULE
 314 int iprule_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 315 int iprule_main(int argc UNUSED_PARAM, char **argv)
 316 {
 317         return ip_do(do_iprule, argv);
 318 }
 319 #endif
 320 #if ENABLE_IPTUNNEL
 321 int iptunnel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 322 int iptunnel_main(int argc UNUSED_PARAM, char **argv)
 323 {
 324         return ip_do(do_iptunnel, argv);
 325 }
 326 #endif
 327 #if ENABLE_IPNEIGH
 328 int ipneigh_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 329 int ipneigh_main(int argc UNUSED_PARAM, char **argv)
 330 {
 331         return ip_do(do_ipneigh, argv);
 332 }
 333 #endif
 334
 335 #if ENABLE_IP
 336 static int FAST_FUNC ip_print_help(char **argv UNUSED_PARAM)
 337 {
 338         bb_show_usage();
 339 }
 340
 341 int ip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 342 int ip_main(int argc UNUSED_PARAM, char **argv)
 343 {
 344         static const char keywords[] ALIGN1 = ""
 345                 IF_FEATURE_IP_ADDRESS("address\0")
 346                 IF_FEATURE_IP_ROUTE("route\0")
 347                 IF_FEATURE_IP_ROUTE("r\0")
 348                 IF_FEATURE_IP_LINK("link\0")
 349                 IF_FEATURE_IP_TUNNEL("tunnel\0")
 350                 IF_FEATURE_IP_TUNNEL("tunl\0")
 351                 IF_FEATURE_IP_RULE("rule\0")
 352                 IF_FEATURE_IP_NEIGH("neigh\0")
 353                 ;
 354         static const ip_func_ptr_t ip_func_ptrs[] = {
 355                 ip_print_help,
 356                 IF_FEATURE_IP_ADDRESS(do_ipaddr,)
 357                 IF_FEATURE_IP_ROUTE(do_iproute,)
 358                 IF_FEATURE_IP_ROUTE(do_iproute,)
 359                 IF_FEATURE_IP_LINK(do_iplink,)
 360                 IF_FEATURE_IP_TUNNEL(do_iptunnel,)
 361                 IF_FEATURE_IP_TUNNEL(do_iptunnel,)
 362                 IF_FEATURE_IP_RULE(do_iprule,)
 363                 IF_FEATURE_IP_NEIGH(do_ipneigh,)
 364         };
 365         ip_func_ptr_t ip_func;
 366         int key;
 367
 368         argv = ip_parse_common_args(argv + 1);
 369         if (ARRAY_SIZE(ip_func_ptrs) > 1 && *argv)
 370                 key = index_in_substrings(keywords, *argv++);
 371         else
 372                 key = -1;
 373         ip_func = ip_func_ptrs[key + 1];
 374
 375         return ip_func(argv);
 376 }
 377 #endif