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 FEATURE_IP_ADDRESS
  21 //config:       bool "ip address"
  22 //config:       default y
  23 //config:       depends on IP
  24 //config:       help
  25 //config:         Address manipulation support for the "ip" applet.
  26 //config:
  27 //config:config FEATURE_IP_LINK
  28 //config:       bool "ip link"
  29 //config:       default y
  30 //config:       depends on IP
  31 //config:       help
  32 //config:         Configure network devices with "ip".
  33 //config:
  34 //config:config FEATURE_IP_ROUTE
  35 //config:       bool "ip route"
  36 //config:       default y
  37 //config:       depends on IP
  38 //config:       help
  39 //config:         Add support for routing table management to "ip".
  40 //config:
  41 //config:config FEATURE_IP_ROUTE_DIR
  42 //config:       string "ip route configuration directory"
  43 //config:       default "/etc/iproute2"
  44 //config:       depends on FEATURE_IP_ROUTE
  45 //config:       help
  46 //config:         Location of the "ip" applet routing configuration.
  47 //config:
  48 //config:config FEATURE_IP_TUNNEL
  49 //config:       bool "ip tunnel"
  50 //config:       default y
  51 //config:       depends on IP
  52 //config:       help
  53 //config:         Add support for tunneling commands to "ip".
  54 //config:
  55 //config:config FEATURE_IP_RULE
  56 //config:       bool "ip rule"
  57 //config:       default y
  58 //config:       depends on IP
  59 //config:       help
  60 //config:         Add support for rule commands to "ip".
  61 //config:
  62 //config:config FEATURE_IP_NEIGH
  63 //config:       bool "ip neighbor"
  64 //config:       default y
  65 //config:       depends on IP
  66 //config:       help
  67 //config:         Add support for neighbor commands to "ip".
  68 //config:
  69 //config:config FEATURE_IP_SHORT_FORMS
  70 //config:       bool "Support short forms of ip commands"
  71 //config:       default y
  72 //config:       depends on IP
  73 //config:       help
  74 //config:         Also support short-form of ip <OBJECT> commands:
  75 //config:         ip addr   -> ipaddr
  76 //config:         ip link   -> iplink
  77 //config:         ip route  -> iproute
  78 //config:         ip tunnel -> iptunnel
  79 //config:         ip rule   -> iprule
  80 //config:         ip neigh  -> ipneigh
  81 //config:
  82 //config:         Say N unless you desparately need the short form of the ip
  83 //config:         object commands.
  84 //config:
  85 //config:config FEATURE_IP_RARE_PROTOCOLS
  86 //config:       bool "Support displaying rarely used link types"
  87 //config:       default n
  88 //config:       depends on IP
  89 //config:       help
  90 //config:         If you are not going to use links of type "frad", "econet",
  91 //config:         "bif" etc, you probably don't need to enable this.
  92 //config:         Ethernet, wireless, infrared, ppp/slip, ip tunnelling
  93 //config:         link types are supported without this option selected.
  94 //config:
  95 //config:config IPADDR
  96 //config:       bool
  97 //config:       default y
  98 //config:       depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_ADDRESS
  99 //config:
 100 //config:config IPLINK
 101 //config:       bool
 102 //config:       default y
 103 //config:       depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_LINK
 104 //config:
 105 //config:config IPROUTE
 106 //config:       bool
 107 //config:       default y
 108 //config:       depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_ROUTE
 109 //config:
 110 //config:config IPTUNNEL
 111 //config:       bool
 112 //config:       default y
 113 //config:       depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_TUNNEL
 114 //config:
 115 //config:config IPRULE
 116 //config:       bool
 117 //config:       default y
 118 //config:       depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_RULE
 119 //config:
 120 //config:config IPNEIGH
 121 //config:       bool
 122 //config:       default y
 123 //config:       depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_NEIGH
 124
 125 //applet:#if ENABLE_FEATURE_IP_ADDRESS || ENABLE_FEATURE_IP_ROUTE || ENABLE_FEATURE_IP_LINK || ENABLE_FEATURE_IP_TUNNEL || ENABLE_FEATURE_IP_RULE || ENABLE_FEATURE_IP_NEIGH
 126 //applet:IF_IP(APPLET(ip, BB_DIR_SBIN, BB_SUID_DROP))
 127 //applet:#endif
 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
 137 /* would need to make the " | " optional depending on more than one selected: */
 138 //usage:#define ip_trivial_usage
 139 //usage:       "[OPTIONS] {"
 140 //usage:        IF_FEATURE_IP_ADDRESS("address | ")
 141 //usage:        IF_FEATURE_IP_ROUTE("route | ")
 142 //usage:        IF_FEATURE_IP_LINK("link | ")
 143 //usage:        IF_FEATURE_IP_TUNNEL("tunnel | ")
 144 //usage:        IF_FEATURE_IP_NEIGH("neigh | ")
 145 //usage:        IF_FEATURE_IP_RULE("rule")
 146 //usage:       "} {COMMAND}"
 147 //usage:#define ip_full_usage "\n\n"
 148 //usage:       "ip [OPTIONS] OBJECT {COMMAND}\n"
 149 //usage:       "where OBJECT := {"
 150 //usage:        IF_FEATURE_IP_ADDRESS("address | ")
 151 //usage:        IF_FEATURE_IP_ROUTE("route | ")
 152 //usage:        IF_FEATURE_IP_LINK("link | ")
 153 //usage:        IF_FEATURE_IP_TUNNEL("tunnel | ")
 154 //usage:        IF_FEATURE_IP_NEIGH("neigh | ")
 155 //usage:        IF_FEATURE_IP_RULE("rule")
 156 //usage:       "}\n"
 157 //usage:       "OPTIONS := { -f[amily] { inet | inet6 | link } | -o[neline] }"
 158 //usage:
 159 //usage:#define ipaddr_trivial_usage
 160 //usage:       "{ {add|del} IFADDR dev STRING | {show|flush}\n"
 161 //usage:       "                [dev STRING] [to PREFIX] }"
 162 //usage:#define ipaddr_full_usage "\n\n"
 163 //usage:       "ipaddr {add|change|replace|delete} IFADDR dev STRING\n"
 164 //usage:       "ipaddr {show|flush} [dev STRING] [scope SCOPE-ID]\n"
 165 //usage:       "        [to PREFIX] [label PATTERN]\n"
 166 //usage:       "        IFADDR := PREFIX | ADDR peer PREFIX\n"
 167 //usage:       "        [broadcast ADDR] [anycast ADDR]\n"
 168 //usage:       "        [label STRING] [scope SCOPE-ID]\n"
 169 //usage:       "        SCOPE-ID := [host | link | global | NUMBER]"
 170 //usage:
 171 //usage:#define iplink_trivial_usage
 172 //usage:       "{ set DEVICE { up | down | arp { on | off } | show [DEVICE] }"
 173 //usage:#define iplink_full_usage "\n\n"
 174 //usage:       "iplink set DEVICE { up | down | arp | multicast { on | off } |\n"
 175 //usage:       "                        dynamic { on | off } |\n"
 176 //usage:       "                        mtu MTU }\n"
 177 //usage:       "iplink show [DEVICE]"
 178 //usage:
 179 //usage:#define iproute_trivial_usage
 180 //usage:       "{ list | flush | add | del | change | append |\n"
 181 //usage:       "                replace | test } ROUTE"
 182 //usage:#define iproute_full_usage "\n\n"
 183 //usage:       "iproute { list | flush } SELECTOR\n"
 184 //usage:       "iproute get ADDRESS [from ADDRESS iif STRING]\n"
 185 //usage:       "        [oif STRING] [tos TOS]\n"
 186 //usage:       "iproute { add | del | change | append | replace | test } ROUTE\n"
 187 //usage:       "        SELECTOR := [root PREFIX] [match PREFIX] [proto RTPROTO]\n"
 188 //usage:       "        ROUTE := [TYPE] PREFIX [tos TOS] [proto RTPROTO] [metric METRIC]"
 189 //usage:
 190 //usage:#define iprule_trivial_usage
 191 //usage:       "{[list | add | del] RULE}"
 192 //usage:#define iprule_full_usage "\n\n"
 193 //usage:       "iprule [list | add | del] SELECTOR ACTION\n"
 194 //usage:       "        SELECTOR := [from PREFIX] [to PREFIX] [tos TOS] [fwmark FWMARK]\n"
 195 //usage:       "                        [dev STRING] [pref NUMBER]\n"
 196 //usage:       "        ACTION := [table TABLE_ID] [nat ADDRESS]\n"
 197 //usage:       "                        [prohibit | reject | unreachable]\n"
 198 //usage:       "                        [realms [SRCREALM/]DSTREALM]\n"
 199 //usage:       "        TABLE_ID := [local | main | default | NUMBER]"
 200 //usage:
 201 //usage:#define iptunnel_trivial_usage
 202 //usage:       "{ add | change | del | show } [NAME]\n"
 203 //usage:       "        [mode { ipip | gre | sit }]\n"
 204 //usage:       "        [remote ADDR] [local ADDR] [ttl TTL]"
 205 //usage:#define iptunnel_full_usage "\n\n"
 206 //usage:       "iptunnel { add | change | del | show } [NAME]\n"
 207 //usage:       "        [mode { ipip | gre | sit }] [remote ADDR] [local ADDR]\n"
 208 //usage:       "        [[i|o]seq] [[i|o]key KEY] [[i|o]csum]\n"
 209 //usage:       "        [ttl TTL] [tos TOS] [[no]pmtudisc] [dev PHYS_DEV]"
 210 //usage:
 211 //usage:#define ipneigh_trivial_usage
 212 //usage:       "{ show | flush} [ to PREFIX ] [ dev DEV ] [ nud STATE ]"
 213 //usage:#define ipneigh_full_usage "\n\n"
 214 //usage:       "ipneigh { show | flush} [ to PREFIX ] [ dev DEV ] [ nud STATE ]"
 215
 216 #include "libbb.h"
 217
 218 #include "libiproute/utils.h"
 219 #include "libiproute/ip_common.h"
 220
 221 #if ENABLE_FEATURE_IP_ADDRESS \
 222  || ENABLE_FEATURE_IP_ROUTE \
 223  || ENABLE_FEATURE_IP_LINK \
 224  || ENABLE_FEATURE_IP_TUNNEL \
 225  || ENABLE_FEATURE_IP_RULE \
 226  || ENABLE_FEATURE_IP_NEIGH
 227
 228 static int FAST_FUNC ip_print_help(char **argv UNUSED_PARAM)
 229 {
 230         bb_show_usage();
 231 }
 232
 233 typedef int FAST_FUNC (*ip_func_ptr_t)(char**);
 234
 235 static int ip_do(ip_func_ptr_t ip_func, char **argv)
 236 {
 237         argv = ip_parse_common_args(argv + 1);
 238         return ip_func(argv);
 239 }
 240
 241 #if ENABLE_FEATURE_IP_ADDRESS
 242 int ipaddr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 243 int ipaddr_main(int argc UNUSED_PARAM, char **argv)
 244 {
 245         return ip_do(do_ipaddr, argv);
 246 }
 247 #endif
 248 #if ENABLE_FEATURE_IP_LINK
 249 int iplink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 250 int iplink_main(int argc UNUSED_PARAM, char **argv)
 251 {
 252         return ip_do(do_iplink, argv);
 253 }
 254 #endif
 255 #if ENABLE_FEATURE_IP_ROUTE
 256 int iproute_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 257 int iproute_main(int argc UNUSED_PARAM, char **argv)
 258 {
 259         return ip_do(do_iproute, argv);
 260 }
 261 #endif
 262 #if ENABLE_FEATURE_IP_RULE
 263 int iprule_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 264 int iprule_main(int argc UNUSED_PARAM, char **argv)
 265 {
 266         return ip_do(do_iprule, argv);
 267 }
 268 #endif
 269 #if ENABLE_FEATURE_IP_TUNNEL
 270 int iptunnel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 271 int iptunnel_main(int argc UNUSED_PARAM, char **argv)
 272 {
 273         return ip_do(do_iptunnel, argv);
 274 }
 275 #endif
 276 #if ENABLE_FEATURE_IP_NEIGH
 277 int ipneigh_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 278 int ipneigh_main(int argc UNUSED_PARAM, char **argv)
 279 {
 280         return ip_do(do_ipneigh, argv);
 281 }
 282 #endif
 283
 284
 285 int ip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 286 int ip_main(int argc UNUSED_PARAM, char **argv)
 287 {
 288         static const char keywords[] ALIGN1 =
 289                 IF_FEATURE_IP_ADDRESS("address\0")
 290                 IF_FEATURE_IP_ROUTE("route\0")
 291                 IF_FEATURE_IP_ROUTE("r\0")
 292                 IF_FEATURE_IP_LINK("link\0")
 293                 IF_FEATURE_IP_TUNNEL("tunnel\0")
 294                 IF_FEATURE_IP_TUNNEL("tunl\0")
 295                 IF_FEATURE_IP_RULE("rule\0")
 296                 IF_FEATURE_IP_NEIGH("neigh\0")
 297                 ;
 298         static const ip_func_ptr_t ip_func_ptrs[] = {
 299                 ip_print_help,
 300                 IF_FEATURE_IP_ADDRESS(do_ipaddr,)
 301                 IF_FEATURE_IP_ROUTE(do_iproute,)
 302                 IF_FEATURE_IP_ROUTE(do_iproute,)
 303                 IF_FEATURE_IP_LINK(do_iplink,)
 304                 IF_FEATURE_IP_TUNNEL(do_iptunnel,)
 305                 IF_FEATURE_IP_TUNNEL(do_iptunnel,)
 306                 IF_FEATURE_IP_RULE(do_iprule,)
 307                 IF_FEATURE_IP_NEIGH(do_ipneigh,)
 308         };
 309         ip_func_ptr_t ip_func;
 310         int key;
 311
 312         argv = ip_parse_common_args(argv + 1);
 313         key = *argv ? index_in_substrings(keywords, *argv++) : -1;
 314         ip_func = ip_func_ptrs[key + 1];
 315
 316         return ip_func(argv);
 317 }
 318
 319 #endif /* any of ENABLE_FEATURE_IP_xxx is 1 */