[821] | 1 | /*
|
---|
| 2 | * iptunnel.c "ip tunnel"
|
---|
| 3 | *
|
---|
| 4 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
---|
| 5 | *
|
---|
| 6 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
---|
| 7 | *
|
---|
| 8 | *
|
---|
| 9 | * Changes:
|
---|
| 10 | *
|
---|
| 11 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
|
---|
| 12 | * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit
|
---|
| 13 | * Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag
|
---|
| 14 | */
|
---|
| 15 |
|
---|
| 16 | #include "libbb.h"
|
---|
| 17 | #include <sys/socket.h>
|
---|
| 18 | #include <sys/ioctl.h>
|
---|
| 19 |
|
---|
| 20 | #include <string.h>
|
---|
| 21 | #include <unistd.h>
|
---|
| 22 |
|
---|
| 23 | #include <netinet/ip.h>
|
---|
| 24 |
|
---|
| 25 | #include <net/if.h>
|
---|
| 26 | #include <net/if_arp.h>
|
---|
| 27 |
|
---|
| 28 | #include <asm/types.h>
|
---|
| 29 | #ifndef __constant_htons
|
---|
| 30 | #define __constant_htons htons
|
---|
| 31 | #endif
|
---|
| 32 | #include <linux/if_tunnel.h>
|
---|
| 33 |
|
---|
| 34 | #include "rt_names.h"
|
---|
| 35 | #include "utils.h"
|
---|
| 36 | #include "ip_common.h"
|
---|
| 37 |
|
---|
| 38 |
|
---|
| 39 | static int do_ioctl_get_ifindex(char *dev)
|
---|
| 40 | {
|
---|
| 41 | struct ifreq ifr;
|
---|
| 42 | int fd;
|
---|
| 43 |
|
---|
| 44 | strcpy(ifr.ifr_name, dev);
|
---|
| 45 | fd = socket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 46 | if (ioctl(fd, SIOCGIFINDEX, &ifr)) {
|
---|
| 47 | bb_perror_msg("ioctl");
|
---|
| 48 | return 0;
|
---|
| 49 | }
|
---|
| 50 | close(fd);
|
---|
| 51 | return ifr.ifr_ifindex;
|
---|
| 52 | }
|
---|
| 53 |
|
---|
| 54 | static int do_ioctl_get_iftype(char *dev)
|
---|
| 55 | {
|
---|
| 56 | struct ifreq ifr;
|
---|
| 57 | int fd;
|
---|
| 58 |
|
---|
| 59 | strcpy(ifr.ifr_name, dev);
|
---|
| 60 | fd = socket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 61 | if (ioctl(fd, SIOCGIFHWADDR, &ifr)) {
|
---|
| 62 | bb_perror_msg("ioctl");
|
---|
| 63 | return -1;
|
---|
| 64 | }
|
---|
| 65 | close(fd);
|
---|
| 66 | return ifr.ifr_addr.sa_family;
|
---|
| 67 | }
|
---|
| 68 |
|
---|
| 69 |
|
---|
| 70 | static char *do_ioctl_get_ifname(int idx)
|
---|
| 71 | {
|
---|
| 72 | static struct ifreq ifr;
|
---|
| 73 | int fd;
|
---|
| 74 |
|
---|
| 75 | ifr.ifr_ifindex = idx;
|
---|
| 76 | fd = socket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 77 | if (ioctl(fd, SIOCGIFNAME, &ifr)) {
|
---|
| 78 | bb_perror_msg("ioctl");
|
---|
| 79 | return NULL;
|
---|
| 80 | }
|
---|
| 81 | close(fd);
|
---|
| 82 | return ifr.ifr_name;
|
---|
| 83 | }
|
---|
| 84 |
|
---|
| 85 |
|
---|
| 86 |
|
---|
| 87 | static int do_get_ioctl(char *basedev, struct ip_tunnel_parm *p)
|
---|
| 88 | {
|
---|
| 89 | struct ifreq ifr;
|
---|
| 90 | int fd;
|
---|
| 91 | int err;
|
---|
| 92 |
|
---|
| 93 | strcpy(ifr.ifr_name, basedev);
|
---|
| 94 | ifr.ifr_ifru.ifru_data = (void*)p;
|
---|
| 95 | fd = socket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 96 | err = ioctl(fd, SIOCGETTUNNEL, &ifr);
|
---|
| 97 | if (err) {
|
---|
| 98 | bb_perror_msg("ioctl");
|
---|
| 99 | }
|
---|
| 100 | close(fd);
|
---|
| 101 | return err;
|
---|
| 102 | }
|
---|
| 103 |
|
---|
| 104 | static int do_add_ioctl(int cmd, char *basedev, struct ip_tunnel_parm *p)
|
---|
| 105 | {
|
---|
| 106 | struct ifreq ifr;
|
---|
| 107 | int fd;
|
---|
| 108 | int err;
|
---|
| 109 |
|
---|
| 110 | if (cmd == SIOCCHGTUNNEL && p->name[0]) {
|
---|
| 111 | strcpy(ifr.ifr_name, p->name);
|
---|
| 112 | } else {
|
---|
| 113 | strcpy(ifr.ifr_name, basedev);
|
---|
| 114 | }
|
---|
| 115 | ifr.ifr_ifru.ifru_data = (void*)p;
|
---|
| 116 | fd = socket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 117 | err = ioctl(fd, cmd, &ifr);
|
---|
| 118 | if (err) {
|
---|
| 119 | bb_perror_msg("ioctl");
|
---|
| 120 | }
|
---|
| 121 | close(fd);
|
---|
| 122 | return err;
|
---|
| 123 | }
|
---|
| 124 |
|
---|
| 125 | static int do_del_ioctl(char *basedev, struct ip_tunnel_parm *p)
|
---|
| 126 | {
|
---|
| 127 | struct ifreq ifr;
|
---|
| 128 | int fd;
|
---|
| 129 | int err;
|
---|
| 130 |
|
---|
| 131 | if (p->name[0]) {
|
---|
| 132 | strcpy(ifr.ifr_name, p->name);
|
---|
| 133 | } else {
|
---|
| 134 | strcpy(ifr.ifr_name, basedev);
|
---|
| 135 | }
|
---|
| 136 | ifr.ifr_ifru.ifru_data = (void*)p;
|
---|
| 137 | fd = socket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 138 | err = ioctl(fd, SIOCDELTUNNEL, &ifr);
|
---|
| 139 | if (err) {
|
---|
| 140 | bb_perror_msg("ioctl");
|
---|
| 141 | }
|
---|
| 142 | close(fd);
|
---|
| 143 | return err;
|
---|
| 144 | }
|
---|
| 145 |
|
---|
| 146 | static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
|
---|
| 147 | {
|
---|
| 148 | int count = 0;
|
---|
| 149 | char medium[IFNAMSIZ];
|
---|
| 150 | memset(p, 0, sizeof(*p));
|
---|
| 151 | memset(&medium, 0, sizeof(medium));
|
---|
| 152 |
|
---|
| 153 | p->iph.version = 4;
|
---|
| 154 | p->iph.ihl = 5;
|
---|
| 155 | #ifndef IP_DF
|
---|
| 156 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */
|
---|
| 157 | #endif
|
---|
| 158 | p->iph.frag_off = htons(IP_DF);
|
---|
| 159 |
|
---|
| 160 | while (argc > 0) {
|
---|
| 161 | if (strcmp(*argv, "mode") == 0) {
|
---|
| 162 | NEXT_ARG();
|
---|
| 163 | if (strcmp(*argv, "ipip") == 0 ||
|
---|
| 164 | strcmp(*argv, "ip/ip") == 0) {
|
---|
| 165 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
|
---|
| 166 | bb_error_msg("You managed to ask for more than one tunnel mode.");
|
---|
| 167 | exit(-1);
|
---|
| 168 | }
|
---|
| 169 | p->iph.protocol = IPPROTO_IPIP;
|
---|
| 170 | } else if (strcmp(*argv, "gre") == 0 ||
|
---|
| 171 | strcmp(*argv, "gre/ip") == 0) {
|
---|
| 172 | if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
|
---|
| 173 | bb_error_msg("You managed to ask for more than one tunnel mode.");
|
---|
| 174 | exit(-1);
|
---|
| 175 | }
|
---|
| 176 | p->iph.protocol = IPPROTO_GRE;
|
---|
| 177 | } else if (strcmp(*argv, "sit") == 0 ||
|
---|
| 178 | strcmp(*argv, "ipv6/ip") == 0) {
|
---|
| 179 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
|
---|
| 180 | bb_error_msg("You managed to ask for more than one tunnel mode.");
|
---|
| 181 | exit(-1);
|
---|
| 182 | }
|
---|
| 183 | p->iph.protocol = IPPROTO_IPV6;
|
---|
| 184 | } else {
|
---|
| 185 | bb_error_msg("Cannot guess tunnel mode.");
|
---|
| 186 | exit(-1);
|
---|
| 187 | }
|
---|
| 188 | } else if (strcmp(*argv, "key") == 0) {
|
---|
| 189 | unsigned uval;
|
---|
| 190 | NEXT_ARG();
|
---|
| 191 | p->i_flags |= GRE_KEY;
|
---|
| 192 | p->o_flags |= GRE_KEY;
|
---|
| 193 | if (strchr(*argv, '.'))
|
---|
| 194 | p->i_key = p->o_key = get_addr32(*argv);
|
---|
| 195 | else {
|
---|
| 196 | if (get_unsigned(&uval, *argv, 0)<0) {
|
---|
| 197 | bb_error_msg("invalid value of \"key\"");
|
---|
| 198 | exit(-1);
|
---|
| 199 | }
|
---|
| 200 | p->i_key = p->o_key = htonl(uval);
|
---|
| 201 | }
|
---|
| 202 | } else if (strcmp(*argv, "ikey") == 0) {
|
---|
| 203 | unsigned uval;
|
---|
| 204 | NEXT_ARG();
|
---|
| 205 | p->i_flags |= GRE_KEY;
|
---|
| 206 | if (strchr(*argv, '.'))
|
---|
| 207 | p->o_key = get_addr32(*argv);
|
---|
| 208 | else {
|
---|
| 209 | if (get_unsigned(&uval, *argv, 0)<0) {
|
---|
| 210 | bb_error_msg("invalid value of \"ikey\"");
|
---|
| 211 | exit(-1);
|
---|
| 212 | }
|
---|
| 213 | p->i_key = htonl(uval);
|
---|
| 214 | }
|
---|
| 215 | } else if (strcmp(*argv, "okey") == 0) {
|
---|
| 216 | unsigned uval;
|
---|
| 217 | NEXT_ARG();
|
---|
| 218 | p->o_flags |= GRE_KEY;
|
---|
| 219 | if (strchr(*argv, '.'))
|
---|
| 220 | p->o_key = get_addr32(*argv);
|
---|
| 221 | else {
|
---|
| 222 | if (get_unsigned(&uval, *argv, 0)<0) {
|
---|
| 223 | bb_error_msg("invalid value of \"okey\"");
|
---|
| 224 | exit(-1);
|
---|
| 225 | }
|
---|
| 226 | p->o_key = htonl(uval);
|
---|
| 227 | }
|
---|
| 228 | } else if (strcmp(*argv, "seq") == 0) {
|
---|
| 229 | p->i_flags |= GRE_SEQ;
|
---|
| 230 | p->o_flags |= GRE_SEQ;
|
---|
| 231 | } else if (strcmp(*argv, "iseq") == 0) {
|
---|
| 232 | p->i_flags |= GRE_SEQ;
|
---|
| 233 | } else if (strcmp(*argv, "oseq") == 0) {
|
---|
| 234 | p->o_flags |= GRE_SEQ;
|
---|
| 235 | } else if (strcmp(*argv, "csum") == 0) {
|
---|
| 236 | p->i_flags |= GRE_CSUM;
|
---|
| 237 | p->o_flags |= GRE_CSUM;
|
---|
| 238 | } else if (strcmp(*argv, "icsum") == 0) {
|
---|
| 239 | p->i_flags |= GRE_CSUM;
|
---|
| 240 | } else if (strcmp(*argv, "ocsum") == 0) {
|
---|
| 241 | p->o_flags |= GRE_CSUM;
|
---|
| 242 | } else if (strcmp(*argv, "nopmtudisc") == 0) {
|
---|
| 243 | p->iph.frag_off = 0;
|
---|
| 244 | } else if (strcmp(*argv, "pmtudisc") == 0) {
|
---|
| 245 | p->iph.frag_off = htons(IP_DF);
|
---|
| 246 | } else if (strcmp(*argv, "remote") == 0) {
|
---|
| 247 | NEXT_ARG();
|
---|
| 248 | if (strcmp(*argv, "any"))
|
---|
| 249 | p->iph.daddr = get_addr32(*argv);
|
---|
| 250 | } else if (strcmp(*argv, "local") == 0) {
|
---|
| 251 | NEXT_ARG();
|
---|
| 252 | if (strcmp(*argv, "any"))
|
---|
| 253 | p->iph.saddr = get_addr32(*argv);
|
---|
| 254 | } else if (strcmp(*argv, "dev") == 0) {
|
---|
| 255 | NEXT_ARG();
|
---|
| 256 | strncpy(medium, *argv, IFNAMSIZ-1);
|
---|
| 257 | } else if (strcmp(*argv, "ttl") == 0) {
|
---|
| 258 | unsigned uval;
|
---|
| 259 | NEXT_ARG();
|
---|
| 260 | if (strcmp(*argv, "inherit") != 0) {
|
---|
| 261 | if (get_unsigned(&uval, *argv, 0))
|
---|
| 262 | invarg(*argv, "TTL");
|
---|
| 263 | if (uval > 255)
|
---|
| 264 | invarg(*argv, "TTL must be <=255");
|
---|
| 265 | p->iph.ttl = uval;
|
---|
| 266 | }
|
---|
| 267 | } else if (strcmp(*argv, "tos") == 0 ||
|
---|
| 268 | matches(*argv, "dsfield") == 0) {
|
---|
| 269 | __u32 uval;
|
---|
| 270 | NEXT_ARG();
|
---|
| 271 | if (strcmp(*argv, "inherit") != 0) {
|
---|
| 272 | if (rtnl_dsfield_a2n(&uval, *argv))
|
---|
| 273 | invarg(*argv, "TOS");
|
---|
| 274 | p->iph.tos = uval;
|
---|
| 275 | } else
|
---|
| 276 | p->iph.tos = 1;
|
---|
| 277 | } else {
|
---|
| 278 | if (strcmp(*argv, "name") == 0) {
|
---|
| 279 | NEXT_ARG();
|
---|
| 280 | }
|
---|
| 281 | if (p->name[0])
|
---|
| 282 | duparg2("name", *argv);
|
---|
| 283 | strncpy(p->name, *argv, IFNAMSIZ);
|
---|
| 284 | if (cmd == SIOCCHGTUNNEL && count == 0) {
|
---|
| 285 | struct ip_tunnel_parm old_p;
|
---|
| 286 | memset(&old_p, 0, sizeof(old_p));
|
---|
| 287 | if (do_get_ioctl(*argv, &old_p))
|
---|
| 288 | return -1;
|
---|
| 289 | *p = old_p;
|
---|
| 290 | }
|
---|
| 291 | }
|
---|
| 292 | count++;
|
---|
| 293 | argc--; argv++;
|
---|
| 294 | }
|
---|
| 295 |
|
---|
| 296 |
|
---|
| 297 | if (p->iph.protocol == 0) {
|
---|
| 298 | if (memcmp(p->name, "gre", 3) == 0)
|
---|
| 299 | p->iph.protocol = IPPROTO_GRE;
|
---|
| 300 | else if (memcmp(p->name, "ipip", 4) == 0)
|
---|
| 301 | p->iph.protocol = IPPROTO_IPIP;
|
---|
| 302 | else if (memcmp(p->name, "sit", 3) == 0)
|
---|
| 303 | p->iph.protocol = IPPROTO_IPV6;
|
---|
| 304 | }
|
---|
| 305 |
|
---|
| 306 | if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
|
---|
| 307 | if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
|
---|
| 308 | bb_error_msg("Keys are not allowed with ipip and sit.");
|
---|
| 309 | return -1;
|
---|
| 310 | }
|
---|
| 311 | }
|
---|
| 312 |
|
---|
| 313 | if (medium[0]) {
|
---|
| 314 | p->link = do_ioctl_get_ifindex(medium);
|
---|
| 315 | if (p->link == 0)
|
---|
| 316 | return -1;
|
---|
| 317 | }
|
---|
| 318 |
|
---|
| 319 | if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
|
---|
| 320 | p->i_key = p->iph.daddr;
|
---|
| 321 | p->i_flags |= GRE_KEY;
|
---|
| 322 | }
|
---|
| 323 | if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
|
---|
| 324 | p->o_key = p->iph.daddr;
|
---|
| 325 | p->o_flags |= GRE_KEY;
|
---|
| 326 | }
|
---|
| 327 | if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
|
---|
| 328 | bb_error_msg("Broadcast tunnel requires a source address.");
|
---|
| 329 | return -1;
|
---|
| 330 | }
|
---|
| 331 | return 0;
|
---|
| 332 | }
|
---|
| 333 |
|
---|
| 334 |
|
---|
| 335 | static int do_add(int cmd, int argc, char **argv)
|
---|
| 336 | {
|
---|
| 337 | struct ip_tunnel_parm p;
|
---|
| 338 |
|
---|
| 339 | if (parse_args(argc, argv, cmd, &p) < 0)
|
---|
| 340 | return -1;
|
---|
| 341 |
|
---|
| 342 | if (p.iph.ttl && p.iph.frag_off == 0) {
|
---|
| 343 | bb_error_msg("ttl != 0 and noptmudisc are incompatible");
|
---|
| 344 | return -1;
|
---|
| 345 | }
|
---|
| 346 |
|
---|
| 347 | switch (p.iph.protocol) {
|
---|
| 348 | case IPPROTO_IPIP:
|
---|
| 349 | return do_add_ioctl(cmd, "tunl0", &p);
|
---|
| 350 | case IPPROTO_GRE:
|
---|
| 351 | return do_add_ioctl(cmd, "gre0", &p);
|
---|
| 352 | case IPPROTO_IPV6:
|
---|
| 353 | return do_add_ioctl(cmd, "sit0", &p);
|
---|
| 354 | default:
|
---|
| 355 | bb_error_msg("cannot determine tunnel mode (ipip, gre or sit)");
|
---|
| 356 | return -1;
|
---|
| 357 | }
|
---|
| 358 | return -1;
|
---|
| 359 | }
|
---|
| 360 |
|
---|
| 361 | static int do_del(int argc, char **argv)
|
---|
| 362 | {
|
---|
| 363 | struct ip_tunnel_parm p;
|
---|
| 364 |
|
---|
| 365 | if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
|
---|
| 366 | return -1;
|
---|
| 367 |
|
---|
| 368 | switch (p.iph.protocol) {
|
---|
| 369 | case IPPROTO_IPIP:
|
---|
| 370 | return do_del_ioctl("tunl0", &p);
|
---|
| 371 | case IPPROTO_GRE:
|
---|
| 372 | return do_del_ioctl("gre0", &p);
|
---|
| 373 | case IPPROTO_IPV6:
|
---|
| 374 | return do_del_ioctl("sit0", &p);
|
---|
| 375 | default:
|
---|
| 376 | return do_del_ioctl(p.name, &p);
|
---|
| 377 | }
|
---|
| 378 | return -1;
|
---|
| 379 | }
|
---|
| 380 |
|
---|
| 381 | static void print_tunnel(struct ip_tunnel_parm *p)
|
---|
| 382 | {
|
---|
| 383 | char s1[256];
|
---|
| 384 | char s2[256];
|
---|
| 385 | char s3[64];
|
---|
| 386 | char s4[64];
|
---|
| 387 |
|
---|
| 388 | format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1));
|
---|
| 389 | format_host(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2));
|
---|
| 390 | inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
|
---|
| 391 | inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));
|
---|
| 392 |
|
---|
| 393 | printf("%s: %s/ip remote %s local %s ",
|
---|
| 394 | p->name,
|
---|
| 395 | p->iph.protocol == IPPROTO_IPIP ? "ip" :
|
---|
| 396 | (p->iph.protocol == IPPROTO_GRE ? "gre" :
|
---|
| 397 | (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")),
|
---|
| 398 | p->iph.daddr ? s1 : "any", p->iph.saddr ? s2 : "any");
|
---|
| 399 | if (p->link) {
|
---|
| 400 | char *n = do_ioctl_get_ifname(p->link);
|
---|
| 401 | if (n)
|
---|
| 402 | printf(" dev %s ", n);
|
---|
| 403 | }
|
---|
| 404 | if (p->iph.ttl)
|
---|
| 405 | printf(" ttl %d ", p->iph.ttl);
|
---|
| 406 | else
|
---|
| 407 | printf(" ttl inherit ");
|
---|
| 408 | if (p->iph.tos) {
|
---|
| 409 | SPRINT_BUF(b1);
|
---|
| 410 | printf(" tos");
|
---|
| 411 | if (p->iph.tos&1)
|
---|
| 412 | printf(" inherit");
|
---|
| 413 | if (p->iph.tos&~1)
|
---|
| 414 | printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
|
---|
| 415 | rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
|
---|
| 416 | }
|
---|
| 417 | if (!(p->iph.frag_off&htons(IP_DF)))
|
---|
| 418 | printf(" nopmtudisc");
|
---|
| 419 |
|
---|
| 420 | if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
|
---|
| 421 | printf(" key %s", s3);
|
---|
| 422 | else if ((p->i_flags|p->o_flags)&GRE_KEY) {
|
---|
| 423 | if (p->i_flags&GRE_KEY)
|
---|
| 424 | printf(" ikey %s ", s3);
|
---|
| 425 | if (p->o_flags&GRE_KEY)
|
---|
| 426 | printf(" okey %s ", s4);
|
---|
| 427 | }
|
---|
| 428 |
|
---|
| 429 | if (p->i_flags&GRE_SEQ)
|
---|
| 430 | printf("%s Drop packets out of sequence.\n", _SL_);
|
---|
| 431 | if (p->i_flags&GRE_CSUM)
|
---|
| 432 | printf("%s Checksum in received packet is required.", _SL_);
|
---|
| 433 | if (p->o_flags&GRE_SEQ)
|
---|
| 434 | printf("%s Sequence packets on output.", _SL_);
|
---|
| 435 | if (p->o_flags&GRE_CSUM)
|
---|
| 436 | printf("%s Checksum output packets.", _SL_);
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | static int do_tunnels_list(struct ip_tunnel_parm *p)
|
---|
| 440 | {
|
---|
| 441 | char name[IFNAMSIZ];
|
---|
| 442 | unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
|
---|
| 443 | rx_fifo, rx_frame,
|
---|
| 444 | tx_bytes, tx_packets, tx_errs, tx_drops,
|
---|
| 445 | tx_fifo, tx_colls, tx_carrier, rx_multi;
|
---|
| 446 | int type;
|
---|
| 447 | struct ip_tunnel_parm p1;
|
---|
| 448 |
|
---|
| 449 | char buf[512];
|
---|
| 450 | FILE *fp = fopen("/proc/net/dev", "r");
|
---|
| 451 | if (fp == NULL) {
|
---|
| 452 | perror("fopen");
|
---|
| 453 | return -1;
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | fgets(buf, sizeof(buf), fp);
|
---|
| 457 | fgets(buf, sizeof(buf), fp);
|
---|
| 458 |
|
---|
| 459 | while (fgets(buf, sizeof(buf), fp) != NULL) {
|
---|
| 460 | char *ptr;
|
---|
| 461 | buf[sizeof(buf) - 1] = 0;
|
---|
| 462 | if ((ptr = strchr(buf, ':')) == NULL ||
|
---|
| 463 | (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
|
---|
| 464 | bb_error_msg("Wrong format of /proc/net/dev. Sorry.");
|
---|
| 465 | return -1;
|
---|
| 466 | }
|
---|
| 467 | if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
|
---|
| 468 | &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
|
---|
| 469 | &rx_fifo, &rx_frame, &rx_multi,
|
---|
| 470 | &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
|
---|
| 471 | &tx_fifo, &tx_colls, &tx_carrier) != 14)
|
---|
| 472 | continue;
|
---|
| 473 | if (p->name[0] && strcmp(p->name, name))
|
---|
| 474 | continue;
|
---|
| 475 | type = do_ioctl_get_iftype(name);
|
---|
| 476 | if (type == -1) {
|
---|
| 477 | bb_error_msg("Failed to get type of [%s]", name);
|
---|
| 478 | continue;
|
---|
| 479 | }
|
---|
| 480 | if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
|
---|
| 481 | continue;
|
---|
| 482 | memset(&p1, 0, sizeof(p1));
|
---|
| 483 | if (do_get_ioctl(name, &p1))
|
---|
| 484 | continue;
|
---|
| 485 | if ((p->link && p1.link != p->link) ||
|
---|
| 486 | (p->name[0] && strcmp(p1.name, p->name)) ||
|
---|
| 487 | (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
|
---|
| 488 | (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
|
---|
| 489 | (p->i_key && p1.i_key != p->i_key))
|
---|
| 490 | continue;
|
---|
| 491 | print_tunnel(&p1);
|
---|
| 492 | printf("\n");
|
---|
| 493 | }
|
---|
| 494 | return 0;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | static int do_show(int argc, char **argv)
|
---|
| 498 | {
|
---|
| 499 | int err;
|
---|
| 500 | struct ip_tunnel_parm p;
|
---|
| 501 |
|
---|
| 502 | if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
|
---|
| 503 | return -1;
|
---|
| 504 |
|
---|
| 505 | switch (p.iph.protocol) {
|
---|
| 506 | case IPPROTO_IPIP:
|
---|
| 507 | err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
|
---|
| 508 | break;
|
---|
| 509 | case IPPROTO_GRE:
|
---|
| 510 | err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p);
|
---|
| 511 | break;
|
---|
| 512 | case IPPROTO_IPV6:
|
---|
| 513 | err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p);
|
---|
| 514 | break;
|
---|
| 515 | default:
|
---|
| 516 | do_tunnels_list(&p);
|
---|
| 517 | return 0;
|
---|
| 518 | }
|
---|
| 519 | if (err)
|
---|
| 520 | return -1;
|
---|
| 521 |
|
---|
| 522 | print_tunnel(&p);
|
---|
| 523 | printf("\n");
|
---|
| 524 | return 0;
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | int do_iptunnel(int argc, char **argv)
|
---|
| 528 | {
|
---|
| 529 | if (argc > 0) {
|
---|
| 530 | if (matches(*argv, "add") == 0)
|
---|
| 531 | return do_add(SIOCADDTUNNEL, argc-1, argv+1);
|
---|
| 532 | if (matches(*argv, "change") == 0)
|
---|
| 533 | return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
|
---|
| 534 | if (matches(*argv, "del") == 0)
|
---|
| 535 | return do_del(argc-1, argv+1);
|
---|
| 536 | if (matches(*argv, "show") == 0 ||
|
---|
| 537 | matches(*argv, "lst") == 0 ||
|
---|
| 538 | matches(*argv, "list") == 0)
|
---|
| 539 | return do_show(argc-1, argv+1);
|
---|
| 540 | } else
|
---|
| 541 | return do_show(0, NULL);
|
---|
| 542 |
|
---|
| 543 | bb_error_msg("Command \"%s\" is unknown.", *argv);
|
---|
| 544 | exit(-1);
|
---|
| 545 | }
|
---|