[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /* ifconfig
|
---|
| 3 | *
|
---|
| 4 | * Similar to the standard Unix ifconfig, but with only the necessary
|
---|
| 5 | * parts for AF_INET, and without any printing of if info (for now).
|
---|
| 6 | *
|
---|
| 7 | * Bjorn Wesen, Axis Communications AB
|
---|
| 8 | *
|
---|
| 9 | *
|
---|
| 10 | * Authors of the original ifconfig was:
|
---|
| 11 | * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
|
---|
| 12 | *
|
---|
[2725] | 13 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
[821] | 14 | */
|
---|
| 15 |
|
---|
| 16 | /*
|
---|
| 17 | * Heavily modified by Manuel Novoa III Mar 6, 2001
|
---|
| 18 | *
|
---|
| 19 | * From initial port to busybox, removed most of the redundancy by
|
---|
| 20 | * converting to a table-driven approach. Added several (optional)
|
---|
| 21 | * args missing from initial port.
|
---|
| 22 | *
|
---|
| 23 | * Still missing: media, tunnel.
|
---|
| 24 | *
|
---|
| 25 | * 2002-04-20
|
---|
| 26 | * IPV6 support added by Bart Visscher <magick@linux-fan.com>
|
---|
| 27 | */
|
---|
| 28 |
|
---|
[3232] | 29 | //usage:#define ifconfig_trivial_usage
|
---|
| 30 | //usage: IF_FEATURE_IFCONFIG_STATUS("[-a]") " interface [address]"
|
---|
| 31 | //usage:#define ifconfig_full_usage "\n\n"
|
---|
| 32 | //usage: "Configure a network interface\n"
|
---|
| 33 | //usage: "\n"
|
---|
| 34 | //usage: IF_FEATURE_IPV6(
|
---|
| 35 | //usage: " [add ADDRESS[/PREFIXLEN]]\n")
|
---|
| 36 | //usage: IF_FEATURE_IPV6(
|
---|
| 37 | //usage: " [del ADDRESS[/PREFIXLEN]]\n")
|
---|
| 38 | //usage: " [[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]\n"
|
---|
| 39 | //usage: " [netmask ADDRESS] [dstaddr ADDRESS]\n"
|
---|
| 40 | //usage: IF_FEATURE_IFCONFIG_SLIP(
|
---|
| 41 | //usage: " [outfill NN] [keepalive NN]\n")
|
---|
| 42 | //usage: " " IF_FEATURE_IFCONFIG_HW("[hw ether" IF_FEATURE_HWIB("|infiniband")" ADDRESS] ") "[metric NN] [mtu NN]\n"
|
---|
| 43 | //usage: " [[-]trailers] [[-]arp] [[-]allmulti]\n"
|
---|
| 44 | //usage: " [multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]\n"
|
---|
| 45 | //usage: IF_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ(
|
---|
| 46 | //usage: " [mem_start NN] [io_addr NN] [irq NN]\n")
|
---|
| 47 | //usage: " [up|down] ..."
|
---|
| 48 |
|
---|
| 49 | #include "libbb.h"
|
---|
| 50 | #include "inet_common.h"
|
---|
[821] | 51 | #include <net/if.h>
|
---|
| 52 | #include <net/if_arp.h>
|
---|
| 53 | #include <netinet/in.h>
|
---|
[3232] | 54 | #ifdef HAVE_NET_ETHERNET_H
|
---|
| 55 | # include <net/ethernet.h>
|
---|
[821] | 56 | #endif
|
---|
| 57 |
|
---|
[1765] | 58 | #if ENABLE_FEATURE_IFCONFIG_SLIP
|
---|
[3621] | 59 | # include <linux/if_slip.h>
|
---|
[821] | 60 | #endif
|
---|
| 61 |
|
---|
| 62 | /* I don't know if this is needed for busybox or not. Anyone? */
|
---|
| 63 | #define QUESTIONABLE_ALIAS_CASE
|
---|
| 64 |
|
---|
| 65 |
|
---|
| 66 | /* Defines for glibc2.0 users. */
|
---|
| 67 | #ifndef SIOCSIFTXQLEN
|
---|
| 68 | # define SIOCSIFTXQLEN 0x8943
|
---|
| 69 | # define SIOCGIFTXQLEN 0x8942
|
---|
| 70 | #endif
|
---|
| 71 |
|
---|
| 72 | /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
|
---|
| 73 | #ifndef ifr_qlen
|
---|
| 74 | # define ifr_qlen ifr_ifru.ifru_mtu
|
---|
| 75 | #endif
|
---|
| 76 |
|
---|
| 77 | #ifndef IFF_DYNAMIC
|
---|
| 78 | # define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
|
---|
| 79 | #endif
|
---|
| 80 |
|
---|
[1765] | 81 | #if ENABLE_FEATURE_IPV6
|
---|
[821] | 82 | struct in6_ifreq {
|
---|
| 83 | struct in6_addr ifr6_addr;
|
---|
| 84 | uint32_t ifr6_prefixlen;
|
---|
| 85 | int ifr6_ifindex;
|
---|
| 86 | };
|
---|
| 87 | #endif
|
---|
| 88 |
|
---|
| 89 | /*
|
---|
| 90 | * Here are the bit masks for the "flags" member of struct options below.
|
---|
| 91 | * N_ signifies no arg prefix; M_ signifies arg prefixed by '-'.
|
---|
| 92 | * CLR clears the flag; SET sets the flag; ARG signifies (optional) arg.
|
---|
| 93 | */
|
---|
| 94 | #define N_CLR 0x01
|
---|
| 95 | #define M_CLR 0x02
|
---|
| 96 | #define N_SET 0x04
|
---|
| 97 | #define M_SET 0x08
|
---|
| 98 | #define N_ARG 0x10
|
---|
| 99 | #define M_ARG 0x20
|
---|
| 100 |
|
---|
| 101 | #define M_MASK (M_CLR | M_SET | M_ARG)
|
---|
| 102 | #define N_MASK (N_CLR | N_SET | N_ARG)
|
---|
| 103 | #define SET_MASK (N_SET | M_SET)
|
---|
| 104 | #define CLR_MASK (N_CLR | M_CLR)
|
---|
| 105 | #define SET_CLR_MASK (SET_MASK | CLR_MASK)
|
---|
| 106 | #define ARG_MASK (M_ARG | N_ARG)
|
---|
| 107 |
|
---|
| 108 | /*
|
---|
| 109 | * Here are the bit masks for the "arg_flags" member of struct options below.
|
---|
| 110 | */
|
---|
| 111 |
|
---|
| 112 | /*
|
---|
| 113 | * cast type:
|
---|
| 114 | * 00 int
|
---|
| 115 | * 01 char *
|
---|
| 116 | * 02 HOST_COPY in_ether
|
---|
| 117 | * 03 HOST_COPY INET_resolve
|
---|
| 118 | */
|
---|
| 119 | #define A_CAST_TYPE 0x03
|
---|
| 120 | /*
|
---|
| 121 | * map type:
|
---|
| 122 | * 00 not a map type (mem_start, io_addr, irq)
|
---|
| 123 | * 04 memstart (unsigned long)
|
---|
| 124 | * 08 io_addr (unsigned short)
|
---|
| 125 | * 0C irq (unsigned char)
|
---|
| 126 | */
|
---|
| 127 | #define A_MAP_TYPE 0x0C
|
---|
| 128 | #define A_ARG_REQ 0x10 /* Set if an arg is required. */
|
---|
| 129 | #define A_NETMASK 0x20 /* Set if netmask (check for multiple sets). */
|
---|
| 130 | #define A_SET_AFTER 0x40 /* Set a flag at the end. */
|
---|
| 131 | #define A_COLON_CHK 0x80 /* Is this needed? See below. */
|
---|
[1765] | 132 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
[821] | 133 | #define A_HOSTNAME 0x100 /* Set if it is ip addr. */
|
---|
| 134 | #define A_BROADCAST 0x200 /* Set if it is broadcast addr. */
|
---|
| 135 | #else
|
---|
| 136 | #define A_HOSTNAME 0
|
---|
| 137 | #define A_BROADCAST 0
|
---|
| 138 | #endif
|
---|
| 139 |
|
---|
| 140 | /*
|
---|
| 141 | * These defines are for dealing with the A_CAST_TYPE field.
|
---|
| 142 | */
|
---|
| 143 | #define A_CAST_CHAR_PTR 0x01
|
---|
| 144 | #define A_CAST_RESOLVE 0x01
|
---|
| 145 | #define A_CAST_HOST_COPY 0x02
|
---|
| 146 | #define A_CAST_HOST_COPY_IN_ETHER A_CAST_HOST_COPY
|
---|
| 147 | #define A_CAST_HOST_COPY_RESOLVE (A_CAST_HOST_COPY | A_CAST_RESOLVE)
|
---|
| 148 |
|
---|
| 149 | /*
|
---|
| 150 | * These defines are for dealing with the A_MAP_TYPE field.
|
---|
| 151 | */
|
---|
| 152 | #define A_MAP_ULONG 0x04 /* memstart */
|
---|
| 153 | #define A_MAP_USHORT 0x08 /* io_addr */
|
---|
| 154 | #define A_MAP_UCHAR 0x0C /* irq */
|
---|
| 155 |
|
---|
| 156 | /*
|
---|
| 157 | * Define the bit masks signifying which operations to perform for each arg.
|
---|
| 158 | */
|
---|
| 159 |
|
---|
| 160 | #define ARG_METRIC (A_ARG_REQ /*| A_CAST_INT*/)
|
---|
| 161 | #define ARG_MTU (A_ARG_REQ /*| A_CAST_INT*/)
|
---|
| 162 | #define ARG_TXQUEUELEN (A_ARG_REQ /*| A_CAST_INT*/)
|
---|
| 163 | #define ARG_MEM_START (A_ARG_REQ | A_MAP_ULONG)
|
---|
| 164 | #define ARG_IO_ADDR (A_ARG_REQ | A_MAP_ULONG)
|
---|
| 165 | #define ARG_IRQ (A_ARG_REQ | A_MAP_UCHAR)
|
---|
| 166 | #define ARG_DSTADDR (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE)
|
---|
| 167 | #define ARG_NETMASK (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK)
|
---|
| 168 | #define ARG_BROADCAST (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST)
|
---|
| 169 | #define ARG_HW (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER)
|
---|
| 170 | #define ARG_POINTOPOINT (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
|
---|
| 171 | #define ARG_KEEPALIVE (A_ARG_REQ | A_CAST_CHAR_PTR)
|
---|
| 172 | #define ARG_OUTFILL (A_ARG_REQ | A_CAST_CHAR_PTR)
|
---|
| 173 | #define ARG_HOSTNAME (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME)
|
---|
| 174 | #define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
|
---|
| 175 |
|
---|
| 176 |
|
---|
| 177 | struct arg1opt {
|
---|
| 178 | const char *name;
|
---|
[2725] | 179 | unsigned short selector;
|
---|
[821] | 180 | unsigned short ifr_offset;
|
---|
| 181 | };
|
---|
| 182 |
|
---|
| 183 | struct options {
|
---|
| 184 | const char *name;
|
---|
[1765] | 185 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
[821] | 186 | const unsigned int flags:6;
|
---|
| 187 | const unsigned int arg_flags:10;
|
---|
| 188 | #else
|
---|
| 189 | const unsigned char flags;
|
---|
| 190 | const unsigned char arg_flags;
|
---|
| 191 | #endif
|
---|
| 192 | const unsigned short selector;
|
---|
| 193 | };
|
---|
| 194 |
|
---|
| 195 | #define ifreq_offsetof(x) offsetof(struct ifreq, x)
|
---|
| 196 |
|
---|
[3232] | 197 | /*
|
---|
| 198 | * Set up the tables. Warning! They must have corresponding order!
|
---|
| 199 | */
|
---|
| 200 |
|
---|
[821] | 201 | static const struct arg1opt Arg1Opt[] = {
|
---|
[2725] | 202 | { "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) },
|
---|
| 203 | { "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) },
|
---|
| 204 | { "SIFTXQLEN", SIOCSIFTXQLEN, ifreq_offsetof(ifr_qlen) },
|
---|
| 205 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) },
|
---|
| 206 | { "SIFNETMASK", SIOCSIFNETMASK, ifreq_offsetof(ifr_netmask) },
|
---|
| 207 | { "SIFBRDADDR", SIOCSIFBRDADDR, ifreq_offsetof(ifr_broadaddr) },
|
---|
[1765] | 208 | #if ENABLE_FEATURE_IFCONFIG_HW
|
---|
[2725] | 209 | { "SIFHWADDR", SIOCSIFHWADDR, ifreq_offsetof(ifr_hwaddr) },
|
---|
[821] | 210 | #endif
|
---|
[2725] | 211 | { "SIFDSTADDR", SIOCSIFDSTADDR, ifreq_offsetof(ifr_dstaddr) },
|
---|
[821] | 212 | #ifdef SIOCSKEEPALIVE
|
---|
[2725] | 213 | { "SKEEPALIVE", SIOCSKEEPALIVE, ifreq_offsetof(ifr_data) },
|
---|
[821] | 214 | #endif
|
---|
| 215 | #ifdef SIOCSOUTFILL
|
---|
[2725] | 216 | { "SOUTFILL", SIOCSOUTFILL, ifreq_offsetof(ifr_data) },
|
---|
[821] | 217 | #endif
|
---|
[1765] | 218 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
|
---|
[2725] | 219 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.mem_start) },
|
---|
| 220 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) },
|
---|
| 221 | { "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) },
|
---|
[821] | 222 | #endif
|
---|
[1765] | 223 | #if ENABLE_FEATURE_IPV6
|
---|
[2725] | 224 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */
|
---|
| 225 | { "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */
|
---|
[821] | 226 | #endif
|
---|
[3232] | 227 | /* Last entry is for unmatched (assumed to be hostname/address) arg. */
|
---|
[2725] | 228 | { "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) },
|
---|
[821] | 229 | };
|
---|
| 230 |
|
---|
| 231 | static const struct options OptArray[] = {
|
---|
[2725] | 232 | { "metric", N_ARG, ARG_METRIC, 0 },
|
---|
| 233 | { "mtu", N_ARG, ARG_MTU, 0 },
|
---|
| 234 | { "txqueuelen", N_ARG, ARG_TXQUEUELEN, 0 },
|
---|
| 235 | { "dstaddr", N_ARG, ARG_DSTADDR, 0 },
|
---|
| 236 | { "netmask", N_ARG, ARG_NETMASK, 0 },
|
---|
| 237 | { "broadcast", N_ARG | M_CLR, ARG_BROADCAST, IFF_BROADCAST },
|
---|
[1765] | 238 | #if ENABLE_FEATURE_IFCONFIG_HW
|
---|
[2725] | 239 | { "hw", N_ARG, ARG_HW, 0 },
|
---|
[821] | 240 | #endif
|
---|
[2725] | 241 | { "pointopoint", N_ARG | M_CLR, ARG_POINTOPOINT, IFF_POINTOPOINT },
|
---|
[821] | 242 | #ifdef SIOCSKEEPALIVE
|
---|
[2725] | 243 | { "keepalive", N_ARG, ARG_KEEPALIVE, 0 },
|
---|
[821] | 244 | #endif
|
---|
| 245 | #ifdef SIOCSOUTFILL
|
---|
[2725] | 246 | { "outfill", N_ARG, ARG_OUTFILL, 0 },
|
---|
[821] | 247 | #endif
|
---|
[1765] | 248 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
|
---|
[2725] | 249 | { "mem_start", N_ARG, ARG_MEM_START, 0 },
|
---|
| 250 | { "io_addr", N_ARG, ARG_IO_ADDR, 0 },
|
---|
| 251 | { "irq", N_ARG, ARG_IRQ, 0 },
|
---|
[821] | 252 | #endif
|
---|
[1765] | 253 | #if ENABLE_FEATURE_IPV6
|
---|
[2725] | 254 | { "add", N_ARG, ARG_ADD_DEL, 0 },
|
---|
| 255 | { "del", N_ARG, ARG_ADD_DEL, 0 },
|
---|
[821] | 256 | #endif
|
---|
[2725] | 257 | { "arp", N_CLR | M_SET, 0, IFF_NOARP },
|
---|
| 258 | { "trailers", N_CLR | M_SET, 0, IFF_NOTRAILERS },
|
---|
| 259 | { "promisc", N_SET | M_CLR, 0, IFF_PROMISC },
|
---|
| 260 | { "multicast", N_SET | M_CLR, 0, IFF_MULTICAST },
|
---|
| 261 | { "allmulti", N_SET | M_CLR, 0, IFF_ALLMULTI },
|
---|
| 262 | { "dynamic", N_SET | M_CLR, 0, IFF_DYNAMIC },
|
---|
| 263 | { "up", N_SET, 0, (IFF_UP | IFF_RUNNING) },
|
---|
| 264 | { "down", N_CLR, 0, IFF_UP },
|
---|
| 265 | { NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING) }
|
---|
[821] | 266 | };
|
---|
| 267 |
|
---|
[2725] | 268 | int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 269 | int ifconfig_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 270 | {
|
---|
| 271 | struct ifreq ifr;
|
---|
| 272 | struct sockaddr_in sai;
|
---|
[1765] | 273 | #if ENABLE_FEATURE_IFCONFIG_HW
|
---|
[821] | 274 | struct sockaddr sa;
|
---|
| 275 | #endif
|
---|
| 276 | const struct arg1opt *a1op;
|
---|
| 277 | const struct options *op;
|
---|
| 278 | int sockfd; /* socket fd we use to manipulate stuff with */
|
---|
| 279 | int selector;
|
---|
[1765] | 280 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
[821] | 281 | unsigned int mask;
|
---|
| 282 | unsigned int did_flags;
|
---|
| 283 | unsigned int sai_hostname, sai_netmask;
|
---|
| 284 | #else
|
---|
| 285 | unsigned char mask;
|
---|
| 286 | unsigned char did_flags;
|
---|
| 287 | #endif
|
---|
| 288 | char *p;
|
---|
[1765] | 289 | /*char host[128];*/
|
---|
| 290 | const char *host = NULL; /* make gcc happy */
|
---|
[821] | 291 |
|
---|
| 292 | did_flags = 0;
|
---|
[1765] | 293 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
[821] | 294 | sai_hostname = 0;
|
---|
| 295 | sai_netmask = 0;
|
---|
| 296 | #endif
|
---|
| 297 |
|
---|
| 298 | /* skip argv[0] */
|
---|
| 299 | ++argv;
|
---|
| 300 |
|
---|
[1765] | 301 | #if ENABLE_FEATURE_IFCONFIG_STATUS
|
---|
[2725] | 302 | if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) {
|
---|
[821] | 303 | interface_opt_a = 1;
|
---|
| 304 | ++argv;
|
---|
| 305 | }
|
---|
| 306 | #endif
|
---|
| 307 |
|
---|
[2725] | 308 | if (!argv[0] || !argv[1]) { /* one or no args */
|
---|
[1765] | 309 | #if ENABLE_FEATURE_IFCONFIG_STATUS
|
---|
[2725] | 310 | return display_interfaces(argv[0] /* can be NULL */);
|
---|
[821] | 311 | #else
|
---|
[1765] | 312 | bb_error_msg_and_die("no support for status display");
|
---|
[821] | 313 | #endif
|
---|
| 314 | }
|
---|
| 315 |
|
---|
| 316 | /* Create a channel to the NET kernel. */
|
---|
[1765] | 317 | sockfd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
[821] | 318 |
|
---|
| 319 | /* get interface name */
|
---|
[2725] | 320 | strncpy_IFNAMSIZ(ifr.ifr_name, *argv);
|
---|
[821] | 321 |
|
---|
| 322 | /* Process the remaining arguments. */
|
---|
[3232] | 323 | while (*++argv != NULL) {
|
---|
[821] | 324 | p = *argv;
|
---|
| 325 | mask = N_MASK;
|
---|
| 326 | if (*p == '-') { /* If the arg starts with '-'... */
|
---|
| 327 | ++p; /* advance past it and */
|
---|
| 328 | mask = M_MASK; /* set the appropriate mask. */
|
---|
| 329 | }
|
---|
| 330 | for (op = OptArray; op->name; op++) { /* Find table entry. */
|
---|
| 331 | if (strcmp(p, op->name) == 0) { /* If name matches... */
|
---|
[1765] | 332 | mask &= op->flags;
|
---|
| 333 | if (mask) /* set the mask and go. */
|
---|
[821] | 334 | goto FOUND_ARG;
|
---|
| 335 | /* If we get here, there was a valid arg with an */
|
---|
| 336 | /* invalid '-' prefix. */
|
---|
[1765] | 337 | bb_error_msg_and_die("bad: '%s'", p-1);
|
---|
[821] | 338 | }
|
---|
| 339 | }
|
---|
| 340 |
|
---|
| 341 | /* We fell through, so treat as possible hostname. */
|
---|
[1765] | 342 | a1op = Arg1Opt + ARRAY_SIZE(Arg1Opt) - 1;
|
---|
[821] | 343 | mask = op->arg_flags;
|
---|
| 344 | goto HOSTNAME;
|
---|
| 345 |
|
---|
[1765] | 346 | FOUND_ARG:
|
---|
[821] | 347 | if (mask & ARG_MASK) {
|
---|
| 348 | mask = op->arg_flags;
|
---|
[1765] | 349 | if (mask & A_NETMASK & did_flags)
|
---|
[821] | 350 | bb_show_usage();
|
---|
[3232] | 351 | a1op = Arg1Opt + (op - OptArray);
|
---|
[821] | 352 | if (*++argv == NULL) {
|
---|
[1765] | 353 | if (mask & A_ARG_REQ)
|
---|
[821] | 354 | bb_show_usage();
|
---|
[1765] | 355 | --argv;
|
---|
| 356 | mask &= A_SET_AFTER; /* just for broadcast */
|
---|
[821] | 357 | } else { /* got an arg so process it */
|
---|
[1765] | 358 | HOSTNAME:
|
---|
[821] | 359 | did_flags |= (mask & (A_NETMASK|A_HOSTNAME));
|
---|
| 360 | if (mask & A_CAST_HOST_COPY) {
|
---|
[1765] | 361 | #if ENABLE_FEATURE_IFCONFIG_HW
|
---|
[821] | 362 | if (mask & A_CAST_RESOLVE) {
|
---|
| 363 | #endif
|
---|
[1765] | 364 | host = *argv;
|
---|
[3232] | 365 | if (strcmp(host, "inet") == 0)
|
---|
| 366 | continue; /* compat stuff */
|
---|
[821] | 367 | sai.sin_family = AF_INET;
|
---|
| 368 | sai.sin_port = 0;
|
---|
[2725] | 369 | if (strcmp(host, "default") == 0) {
|
---|
[821] | 370 | /* Default is special, meaning 0.0.0.0. */
|
---|
| 371 | sai.sin_addr.s_addr = INADDR_ANY;
|
---|
[1765] | 372 | }
|
---|
| 373 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
[3232] | 374 | else if ((host[0] == '+' && !host[1])
|
---|
| 375 | && (mask & A_BROADCAST)
|
---|
[1765] | 376 | && (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME)
|
---|
| 377 | ) {
|
---|
[821] | 378 | /* + is special, meaning broadcast is derived. */
|
---|
| 379 | sai.sin_addr.s_addr = (~sai_netmask) | (sai_hostname & sai_netmask);
|
---|
[1765] | 380 | }
|
---|
[821] | 381 | #endif
|
---|
[1765] | 382 | else {
|
---|
| 383 | len_and_sockaddr *lsa;
|
---|
[3232] | 384 | #if ENABLE_FEATURE_IPV6
|
---|
| 385 | char *prefix;
|
---|
| 386 | int prefix_len = 0;
|
---|
| 387 | prefix = strchr(host, '/');
|
---|
| 388 | if (prefix) {
|
---|
| 389 | prefix_len = xatou_range(prefix + 1, 0, 128);
|
---|
| 390 | *prefix = '\0';
|
---|
| 391 | }
|
---|
| 392 | resolve:
|
---|
| 393 | #endif
|
---|
[1765] | 394 | lsa = xhost2sockaddr(host, 0);
|
---|
| 395 | #if ENABLE_FEATURE_IPV6
|
---|
[3232] | 396 | if (lsa->u.sa.sa_family != AF_INET6 && prefix) {
|
---|
| 397 | /* TODO: we do not support "ifconfig eth0 up 1.2.3.4/17".
|
---|
| 398 | * For now, just make it fail instead of silently ignoring "/17" part:
|
---|
| 399 | */
|
---|
| 400 | *prefix = '/';
|
---|
| 401 | goto resolve;
|
---|
| 402 | }
|
---|
[2725] | 403 | if (lsa->u.sa.sa_family == AF_INET6) {
|
---|
[1765] | 404 | int sockfd6;
|
---|
| 405 | struct in6_ifreq ifr6;
|
---|
[821] | 406 |
|
---|
[1765] | 407 | sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0);
|
---|
[3232] | 408 | xioctl(sockfd6, SIOCGIFINDEX, &ifr);
|
---|
[1765] | 409 | ifr6.ifr6_ifindex = ifr.ifr_ifindex;
|
---|
| 410 | ifr6.ifr6_prefixlen = prefix_len;
|
---|
[3232] | 411 | memcpy(&ifr6.ifr6_addr,
|
---|
| 412 | &lsa->u.sin6.sin6_addr,
|
---|
| 413 | sizeof(struct in6_addr));
|
---|
[2725] | 414 | ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name);
|
---|
[1765] | 415 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 416 | free(lsa);
|
---|
[821] | 417 | continue;
|
---|
| 418 | }
|
---|
| 419 | #endif
|
---|
[2725] | 420 | sai.sin_addr = lsa->u.sin.sin_addr;
|
---|
[1765] | 421 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 422 | free(lsa);
|
---|
[821] | 423 | }
|
---|
[1765] | 424 | #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
|
---|
| 425 | if (mask & A_HOSTNAME)
|
---|
[821] | 426 | sai_hostname = sai.sin_addr.s_addr;
|
---|
[1765] | 427 | if (mask & A_NETMASK)
|
---|
[821] | 428 | sai_netmask = sai.sin_addr.s_addr;
|
---|
| 429 | #endif
|
---|
| 430 | p = (char *) &sai;
|
---|
[1765] | 431 | #if ENABLE_FEATURE_IFCONFIG_HW
|
---|
[821] | 432 | } else { /* A_CAST_HOST_COPY_IN_ETHER */
|
---|
| 433 | /* This is the "hw" arg case. */
|
---|
[3232] | 434 | smalluint hw_class = index_in_substrings("ether\0"
|
---|
[2725] | 435 | IF_FEATURE_HWIB("infiniband\0"), *argv) + 1;
|
---|
| 436 | if (!hw_class || !*++argv)
|
---|
[821] | 437 | bb_show_usage();
|
---|
[1765] | 438 | host = *argv;
|
---|
[2725] | 439 | if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa))
|
---|
[1765] | 440 | bb_error_msg_and_die("invalid hw-addr %s", host);
|
---|
[821] | 441 | p = (char *) &sa;
|
---|
| 442 | }
|
---|
| 443 | #endif
|
---|
[3232] | 444 | memcpy( ((char *)&ifr) + a1op->ifr_offset,
|
---|
| 445 | p, sizeof(struct sockaddr));
|
---|
[821] | 446 | } else {
|
---|
[1765] | 447 | /* FIXME: error check?? */
|
---|
[821] | 448 | unsigned long i = strtoul(*argv, NULL, 0);
|
---|
[1765] | 449 | p = ((char *)&ifr) + a1op->ifr_offset;
|
---|
| 450 | #if ENABLE_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
|
---|
[821] | 451 | if (mask & A_MAP_TYPE) {
|
---|
[1765] | 452 | xioctl(sockfd, SIOCGIFMAP, &ifr);
|
---|
| 453 | if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR)
|
---|
[3232] | 454 | *(unsigned char *) p = i;
|
---|
[1765] | 455 | else if (mask & A_MAP_USHORT)
|
---|
[3232] | 456 | *(unsigned short *) p = i;
|
---|
[1765] | 457 | else
|
---|
[3232] | 458 | *(unsigned long *) p = i;
|
---|
[821] | 459 | } else
|
---|
| 460 | #endif
|
---|
[1765] | 461 | if (mask & A_CAST_CHAR_PTR)
|
---|
[3232] | 462 | *(caddr_t *) p = (caddr_t) i;
|
---|
[1765] | 463 | else /* A_CAST_INT */
|
---|
[3232] | 464 | *(int *) p = i;
|
---|
[821] | 465 | }
|
---|
| 466 |
|
---|
[2725] | 467 | ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name);
|
---|
[821] | 468 | #ifdef QUESTIONABLE_ALIAS_CASE
|
---|
| 469 | if (mask & A_COLON_CHK) {
|
---|
| 470 | /*
|
---|
| 471 | * Don't do the set_flag() if the address is an alias with
|
---|
[1765] | 472 | * a '-' at the end, since it's deleted already! - Roman
|
---|
[821] | 473 | *
|
---|
| 474 | * Should really use regex.h here, not sure though how well
|
---|
| 475 | * it'll go with the cross-platform support etc.
|
---|
| 476 | */
|
---|
| 477 | char *ptr;
|
---|
| 478 | short int found_colon = 0;
|
---|
[1765] | 479 | for (ptr = ifr.ifr_name; *ptr; ptr++)
|
---|
| 480 | if (*ptr == ':')
|
---|
[821] | 481 | found_colon++;
|
---|
[1765] | 482 | if (found_colon && ptr[-1] == '-')
|
---|
[821] | 483 | continue;
|
---|
| 484 | }
|
---|
| 485 | #endif
|
---|
| 486 | }
|
---|
[1765] | 487 | if (!(mask & A_SET_AFTER))
|
---|
[821] | 488 | continue;
|
---|
| 489 | mask = N_SET;
|
---|
[3232] | 490 | } /* if (mask & ARG_MASK) */
|
---|
[821] | 491 |
|
---|
[1765] | 492 | xioctl(sockfd, SIOCGIFFLAGS, &ifr);
|
---|
| 493 | selector = op->selector;
|
---|
| 494 | if (mask & SET_MASK)
|
---|
| 495 | ifr.ifr_flags |= selector;
|
---|
| 496 | else
|
---|
| 497 | ifr.ifr_flags &= ~selector;
|
---|
| 498 | xioctl(sockfd, SIOCSIFFLAGS, &ifr);
|
---|
| 499 | } /* while () */
|
---|
[821] | 500 |
|
---|
[1765] | 501 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 502 | close(sockfd);
|
---|
| 503 | return 0;
|
---|
[821] | 504 | }
|
---|