[3320] | 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 | *
|
---|
| 9 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
|
---|
| 10 | * Rani Assaf <rani@magic.metawire.com> 980930: do not allow key for ipip/sit
|
---|
| 11 | * Phil Karn <karn@ka9q.ampr.org> 990408: "pmtudisc" flag
|
---|
| 12 | */
|
---|
| 13 |
|
---|
| 14 | #include <netinet/ip.h>
|
---|
| 15 | #include <net/if.h>
|
---|
| 16 | #include <net/if_arp.h>
|
---|
| 17 | #include <asm/types.h>
|
---|
| 18 |
|
---|
| 19 | #ifndef __constant_htons
|
---|
| 20 | #define __constant_htons htons
|
---|
| 21 | #endif
|
---|
| 22 |
|
---|
| 23 | // FYI: #define SIOCDEVPRIVATE 0x89F0
|
---|
| 24 |
|
---|
| 25 | /* From linux/if_tunnel.h. #including it proved troublesome
|
---|
| 26 | * (redefiniton errors due to name collisions in linux/ and net[inet]/) */
|
---|
| 27 | #define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0)
|
---|
| 28 | #define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1)
|
---|
| 29 | #define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2)
|
---|
| 30 | #define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3)
|
---|
| 31 | //#define SIOCGETPRL (SIOCDEVPRIVATE + 4)
|
---|
| 32 | //#define SIOCADDPRL (SIOCDEVPRIVATE + 5)
|
---|
| 33 | //#define SIOCDELPRL (SIOCDEVPRIVATE + 6)
|
---|
| 34 | //#define SIOCCHGPRL (SIOCDEVPRIVATE + 7)
|
---|
| 35 | #define GRE_CSUM __constant_htons(0x8000)
|
---|
| 36 | //#define GRE_ROUTING __constant_htons(0x4000)
|
---|
| 37 | #define GRE_KEY __constant_htons(0x2000)
|
---|
| 38 | #define GRE_SEQ __constant_htons(0x1000)
|
---|
| 39 | //#define GRE_STRICT __constant_htons(0x0800)
|
---|
| 40 | //#define GRE_REC __constant_htons(0x0700)
|
---|
| 41 | //#define GRE_FLAGS __constant_htons(0x00F8)
|
---|
| 42 | //#define GRE_VERSION __constant_htons(0x0007)
|
---|
| 43 | struct ip_tunnel_parm {
|
---|
| 44 | char name[IFNAMSIZ];
|
---|
| 45 | int link;
|
---|
| 46 | uint16_t i_flags;
|
---|
| 47 | uint16_t o_flags;
|
---|
| 48 | uint32_t i_key;
|
---|
| 49 | uint32_t o_key;
|
---|
| 50 | struct iphdr iph;
|
---|
| 51 | };
|
---|
| 52 | /* SIT-mode i_flags */
|
---|
| 53 | //#define SIT_ISATAP 0x0001
|
---|
| 54 | //struct ip_tunnel_prl {
|
---|
| 55 | // uint32_t addr;
|
---|
| 56 | // uint16_t flags;
|
---|
| 57 | // uint16_t __reserved;
|
---|
| 58 | // uint32_t datalen;
|
---|
| 59 | // uint32_t __reserved2;
|
---|
| 60 | // /* data follows */
|
---|
| 61 | //};
|
---|
| 62 | ///* PRL flags */
|
---|
| 63 | //#define PRL_DEFAULT 0x0001
|
---|
| 64 |
|
---|
| 65 | #include "ip_common.h" /* #include "libbb.h" is inside */
|
---|
| 66 | #include "rt_names.h"
|
---|
| 67 | #include "utils.h"
|
---|
| 68 |
|
---|
| 69 |
|
---|
| 70 | /* Dies on error */
|
---|
| 71 | static int do_ioctl_get_ifindex(char *dev)
|
---|
| 72 | {
|
---|
| 73 | struct ifreq ifr;
|
---|
| 74 | int fd;
|
---|
| 75 |
|
---|
| 76 | strncpy_IFNAMSIZ(ifr.ifr_name, dev);
|
---|
| 77 | fd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 78 | xioctl(fd, SIOCGIFINDEX, &ifr);
|
---|
| 79 | close(fd);
|
---|
| 80 | return ifr.ifr_ifindex;
|
---|
| 81 | }
|
---|
| 82 |
|
---|
| 83 | static int do_ioctl_get_iftype(char *dev)
|
---|
| 84 | {
|
---|
| 85 | struct ifreq ifr;
|
---|
| 86 | int fd;
|
---|
| 87 | int err;
|
---|
| 88 |
|
---|
| 89 | strncpy_IFNAMSIZ(ifr.ifr_name, dev);
|
---|
| 90 | fd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 91 | err = ioctl_or_warn(fd, SIOCGIFHWADDR, &ifr);
|
---|
| 92 | close(fd);
|
---|
| 93 | return err ? -1 : ifr.ifr_addr.sa_family;
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 | static char *do_ioctl_get_ifname(int idx)
|
---|
| 97 | {
|
---|
| 98 | struct ifreq ifr;
|
---|
| 99 | int fd;
|
---|
| 100 | int err;
|
---|
| 101 |
|
---|
| 102 | ifr.ifr_ifindex = idx;
|
---|
| 103 | fd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 104 | err = ioctl_or_warn(fd, SIOCGIFNAME, &ifr);
|
---|
| 105 | close(fd);
|
---|
| 106 | return err ? NULL : xstrndup(ifr.ifr_name, sizeof(ifr.ifr_name));
|
---|
| 107 | }
|
---|
| 108 |
|
---|
| 109 | static int do_get_ioctl(const char *basedev, struct ip_tunnel_parm *p)
|
---|
| 110 | {
|
---|
| 111 | struct ifreq ifr;
|
---|
| 112 | int fd;
|
---|
| 113 | int err;
|
---|
| 114 |
|
---|
| 115 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev);
|
---|
| 116 | ifr.ifr_ifru.ifru_data = (void*)p;
|
---|
| 117 | fd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 118 | err = ioctl_or_warn(fd, SIOCGETTUNNEL, &ifr);
|
---|
| 119 | close(fd);
|
---|
| 120 | return err;
|
---|
| 121 | }
|
---|
| 122 |
|
---|
| 123 | /* Dies on error, otherwise returns 0 */
|
---|
| 124 | static int do_add_ioctl(int cmd, const char *basedev, struct ip_tunnel_parm *p)
|
---|
| 125 | {
|
---|
| 126 | struct ifreq ifr;
|
---|
| 127 | int fd;
|
---|
| 128 |
|
---|
| 129 | if (cmd == SIOCCHGTUNNEL && p->name[0]) {
|
---|
| 130 | strncpy_IFNAMSIZ(ifr.ifr_name, p->name);
|
---|
| 131 | } else {
|
---|
| 132 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev);
|
---|
| 133 | }
|
---|
| 134 | ifr.ifr_ifru.ifru_data = (void*)p;
|
---|
| 135 | fd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 136 | #if ENABLE_IOCTL_HEX2STR_ERROR
|
---|
| 137 | /* #define magic will turn ioctl# into string */
|
---|
| 138 | if (cmd == SIOCCHGTUNNEL)
|
---|
| 139 | xioctl(fd, SIOCCHGTUNNEL, &ifr);
|
---|
| 140 | else
|
---|
| 141 | xioctl(fd, SIOCADDTUNNEL, &ifr);
|
---|
| 142 | #else
|
---|
| 143 | xioctl(fd, cmd, &ifr);
|
---|
| 144 | #endif
|
---|
| 145 | close(fd);
|
---|
| 146 | return 0;
|
---|
| 147 | }
|
---|
| 148 |
|
---|
| 149 | /* Dies on error, otherwise returns 0 */
|
---|
| 150 | static int do_del_ioctl(const char *basedev, struct ip_tunnel_parm *p)
|
---|
| 151 | {
|
---|
| 152 | struct ifreq ifr;
|
---|
| 153 | int fd;
|
---|
| 154 |
|
---|
| 155 | if (p->name[0]) {
|
---|
| 156 | strncpy_IFNAMSIZ(ifr.ifr_name, p->name);
|
---|
| 157 | } else {
|
---|
| 158 | strncpy_IFNAMSIZ(ifr.ifr_name, basedev);
|
---|
| 159 | }
|
---|
| 160 | ifr.ifr_ifru.ifru_data = (void*)p;
|
---|
| 161 | fd = xsocket(AF_INET, SOCK_DGRAM, 0);
|
---|
| 162 | xioctl(fd, SIOCDELTUNNEL, &ifr);
|
---|
| 163 | close(fd);
|
---|
| 164 | return 0;
|
---|
| 165 | }
|
---|
| 166 |
|
---|
| 167 | /* Dies on error */
|
---|
| 168 | static void parse_args(char **argv, int cmd, struct ip_tunnel_parm *p)
|
---|
| 169 | {
|
---|
| 170 | static const char keywords[] ALIGN1 =
|
---|
| 171 | "mode\0""ipip\0""ip/ip\0""gre\0""gre/ip\0""sit\0""ipv6/ip\0"
|
---|
| 172 | "key\0""ikey\0""okey\0""seq\0""iseq\0""oseq\0"
|
---|
| 173 | "csum\0""icsum\0""ocsum\0""nopmtudisc\0""pmtudisc\0"
|
---|
| 174 | "remote\0""any\0""local\0""dev\0"
|
---|
| 175 | "ttl\0""inherit\0""tos\0""dsfield\0"
|
---|
| 176 | "name\0";
|
---|
| 177 | enum {
|
---|
| 178 | ARG_mode, ARG_ipip, ARG_ip_ip, ARG_gre, ARG_gre_ip, ARG_sit, ARG_ip6_ip,
|
---|
| 179 | ARG_key, ARG_ikey, ARG_okey, ARG_seq, ARG_iseq, ARG_oseq,
|
---|
| 180 | ARG_csum, ARG_icsum, ARG_ocsum, ARG_nopmtudisc, ARG_pmtudisc,
|
---|
| 181 | ARG_remote, ARG_any, ARG_local, ARG_dev,
|
---|
| 182 | ARG_ttl, ARG_inherit, ARG_tos, ARG_dsfield,
|
---|
| 183 | ARG_name
|
---|
| 184 | };
|
---|
| 185 | int count = 0;
|
---|
| 186 | char medium[IFNAMSIZ];
|
---|
| 187 | int key;
|
---|
| 188 |
|
---|
| 189 | memset(p, 0, sizeof(*p));
|
---|
| 190 | medium[0] = '\0';
|
---|
| 191 |
|
---|
| 192 | p->iph.version = 4;
|
---|
| 193 | p->iph.ihl = 5;
|
---|
| 194 | #ifndef IP_DF
|
---|
| 195 | #define IP_DF 0x4000 /* Flag: "Don't Fragment" */
|
---|
| 196 | #endif
|
---|
| 197 | p->iph.frag_off = htons(IP_DF);
|
---|
| 198 |
|
---|
| 199 | while (*argv) {
|
---|
| 200 | key = index_in_strings(keywords, *argv);
|
---|
| 201 | if (key == ARG_mode) {
|
---|
| 202 | NEXT_ARG();
|
---|
| 203 | key = index_in_strings(keywords, *argv);
|
---|
| 204 | if (key == ARG_ipip ||
|
---|
| 205 | key == ARG_ip_ip
|
---|
| 206 | ) {
|
---|
| 207 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
|
---|
| 208 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one");
|
---|
| 209 | }
|
---|
| 210 | p->iph.protocol = IPPROTO_IPIP;
|
---|
| 211 | } else if (key == ARG_gre ||
|
---|
| 212 | key == ARG_gre_ip
|
---|
| 213 | ) {
|
---|
| 214 | if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
|
---|
| 215 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one");
|
---|
| 216 | }
|
---|
| 217 | p->iph.protocol = IPPROTO_GRE;
|
---|
| 218 | } else if (key == ARG_sit ||
|
---|
| 219 | key == ARG_ip6_ip
|
---|
| 220 | ) {
|
---|
| 221 | if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
|
---|
| 222 | bb_error_msg_and_die("%s tunnel mode", "you managed to ask for more than one");
|
---|
| 223 | }
|
---|
| 224 | p->iph.protocol = IPPROTO_IPV6;
|
---|
| 225 | } else {
|
---|
| 226 | bb_error_msg_and_die("%s tunnel mode", "can't guess");
|
---|
| 227 | }
|
---|
| 228 | } else if (key == ARG_key) {
|
---|
| 229 | unsigned uval;
|
---|
| 230 | NEXT_ARG();
|
---|
| 231 | p->i_flags |= GRE_KEY;
|
---|
| 232 | p->o_flags |= GRE_KEY;
|
---|
| 233 | if (strchr(*argv, '.'))
|
---|
| 234 | p->i_key = p->o_key = get_addr32(*argv);
|
---|
| 235 | else {
|
---|
| 236 | uval = get_unsigned(*argv, "key");
|
---|
| 237 | p->i_key = p->o_key = htonl(uval);
|
---|
| 238 | }
|
---|
| 239 | } else if (key == ARG_ikey) {
|
---|
| 240 | unsigned uval;
|
---|
| 241 | NEXT_ARG();
|
---|
| 242 | p->i_flags |= GRE_KEY;
|
---|
| 243 | if (strchr(*argv, '.'))
|
---|
| 244 | p->o_key = get_addr32(*argv);
|
---|
| 245 | else {
|
---|
| 246 | uval = get_unsigned(*argv, "ikey");
|
---|
| 247 | p->i_key = htonl(uval);
|
---|
| 248 | }
|
---|
| 249 | } else if (key == ARG_okey) {
|
---|
| 250 | unsigned uval;
|
---|
| 251 | NEXT_ARG();
|
---|
| 252 | p->o_flags |= GRE_KEY;
|
---|
| 253 | if (strchr(*argv, '.'))
|
---|
| 254 | p->o_key = get_addr32(*argv);
|
---|
| 255 | else {
|
---|
| 256 | uval = get_unsigned(*argv, "okey");
|
---|
| 257 | p->o_key = htonl(uval);
|
---|
| 258 | }
|
---|
| 259 | } else if (key == ARG_seq) {
|
---|
| 260 | p->i_flags |= GRE_SEQ;
|
---|
| 261 | p->o_flags |= GRE_SEQ;
|
---|
| 262 | } else if (key == ARG_iseq) {
|
---|
| 263 | p->i_flags |= GRE_SEQ;
|
---|
| 264 | } else if (key == ARG_oseq) {
|
---|
| 265 | p->o_flags |= GRE_SEQ;
|
---|
| 266 | } else if (key == ARG_csum) {
|
---|
| 267 | p->i_flags |= GRE_CSUM;
|
---|
| 268 | p->o_flags |= GRE_CSUM;
|
---|
| 269 | } else if (key == ARG_icsum) {
|
---|
| 270 | p->i_flags |= GRE_CSUM;
|
---|
| 271 | } else if (key == ARG_ocsum) {
|
---|
| 272 | p->o_flags |= GRE_CSUM;
|
---|
| 273 | } else if (key == ARG_nopmtudisc) {
|
---|
| 274 | p->iph.frag_off = 0;
|
---|
| 275 | } else if (key == ARG_pmtudisc) {
|
---|
| 276 | p->iph.frag_off = htons(IP_DF);
|
---|
| 277 | } else if (key == ARG_remote) {
|
---|
| 278 | NEXT_ARG();
|
---|
| 279 | key = index_in_strings(keywords, *argv);
|
---|
| 280 | if (key != ARG_any)
|
---|
| 281 | p->iph.daddr = get_addr32(*argv);
|
---|
| 282 | } else if (key == ARG_local) {
|
---|
| 283 | NEXT_ARG();
|
---|
| 284 | key = index_in_strings(keywords, *argv);
|
---|
| 285 | if (key != ARG_any)
|
---|
| 286 | p->iph.saddr = get_addr32(*argv);
|
---|
| 287 | } else if (key == ARG_dev) {
|
---|
| 288 | NEXT_ARG();
|
---|
| 289 | strncpy_IFNAMSIZ(medium, *argv);
|
---|
| 290 | } else if (key == ARG_ttl) {
|
---|
| 291 | unsigned uval;
|
---|
| 292 | NEXT_ARG();
|
---|
| 293 | key = index_in_strings(keywords, *argv);
|
---|
| 294 | if (key != ARG_inherit) {
|
---|
| 295 | uval = get_unsigned(*argv, "TTL");
|
---|
| 296 | if (uval > 255)
|
---|
| 297 | invarg(*argv, "TTL must be <=255");
|
---|
| 298 | p->iph.ttl = uval;
|
---|
| 299 | }
|
---|
| 300 | } else if (key == ARG_tos ||
|
---|
| 301 | key == ARG_dsfield
|
---|
| 302 | ) {
|
---|
| 303 | uint32_t uval;
|
---|
| 304 | NEXT_ARG();
|
---|
| 305 | key = index_in_strings(keywords, *argv);
|
---|
| 306 | if (key != ARG_inherit) {
|
---|
| 307 | if (rtnl_dsfield_a2n(&uval, *argv))
|
---|
| 308 | invarg(*argv, "TOS");
|
---|
| 309 | p->iph.tos = uval;
|
---|
| 310 | } else
|
---|
| 311 | p->iph.tos = 1;
|
---|
| 312 | } else {
|
---|
| 313 | if (key == ARG_name) {
|
---|
| 314 | NEXT_ARG();
|
---|
| 315 | }
|
---|
| 316 | if (p->name[0])
|
---|
| 317 | duparg2("name", *argv);
|
---|
| 318 | strncpy_IFNAMSIZ(p->name, *argv);
|
---|
| 319 | if (cmd == SIOCCHGTUNNEL && count == 0) {
|
---|
| 320 | struct ip_tunnel_parm old_p;
|
---|
| 321 | memset(&old_p, 0, sizeof(old_p));
|
---|
| 322 | if (do_get_ioctl(*argv, &old_p))
|
---|
| 323 | exit(EXIT_FAILURE);
|
---|
| 324 | *p = old_p;
|
---|
| 325 | }
|
---|
| 326 | }
|
---|
| 327 | count++;
|
---|
| 328 | argv++;
|
---|
| 329 | }
|
---|
| 330 |
|
---|
| 331 | if (p->iph.protocol == 0) {
|
---|
| 332 | if (memcmp(p->name, "gre", 3) == 0)
|
---|
| 333 | p->iph.protocol = IPPROTO_GRE;
|
---|
| 334 | else if (memcmp(p->name, "ipip", 4) == 0)
|
---|
| 335 | p->iph.protocol = IPPROTO_IPIP;
|
---|
| 336 | else if (memcmp(p->name, "sit", 3) == 0)
|
---|
| 337 | p->iph.protocol = IPPROTO_IPV6;
|
---|
| 338 | }
|
---|
| 339 |
|
---|
| 340 | if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
|
---|
| 341 | if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
|
---|
| 342 | bb_error_msg_and_die("keys are not allowed with ipip and sit");
|
---|
| 343 | }
|
---|
| 344 | }
|
---|
| 345 |
|
---|
| 346 | if (medium[0]) {
|
---|
| 347 | p->link = do_ioctl_get_ifindex(medium);
|
---|
| 348 | }
|
---|
| 349 |
|
---|
| 350 | if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
|
---|
| 351 | p->i_key = p->iph.daddr;
|
---|
| 352 | p->i_flags |= GRE_KEY;
|
---|
| 353 | }
|
---|
| 354 | if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
|
---|
| 355 | p->o_key = p->iph.daddr;
|
---|
| 356 | p->o_flags |= GRE_KEY;
|
---|
| 357 | }
|
---|
| 358 | if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
|
---|
| 359 | bb_error_msg_and_die("broadcast tunnel requires a source address");
|
---|
| 360 | }
|
---|
| 361 | }
|
---|
| 362 |
|
---|
| 363 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 364 | static int do_add(int cmd, char **argv)
|
---|
| 365 | {
|
---|
| 366 | struct ip_tunnel_parm p;
|
---|
| 367 |
|
---|
| 368 | parse_args(argv, cmd, &p);
|
---|
| 369 |
|
---|
| 370 | if (p.iph.ttl && p.iph.frag_off == 0) {
|
---|
| 371 | bb_error_msg_and_die("ttl != 0 and noptmudisc are incompatible");
|
---|
| 372 | }
|
---|
| 373 |
|
---|
| 374 | switch (p.iph.protocol) {
|
---|
| 375 | case IPPROTO_IPIP:
|
---|
| 376 | return do_add_ioctl(cmd, "tunl0", &p);
|
---|
| 377 | case IPPROTO_GRE:
|
---|
| 378 | return do_add_ioctl(cmd, "gre0", &p);
|
---|
| 379 | case IPPROTO_IPV6:
|
---|
| 380 | return do_add_ioctl(cmd, "sit0", &p);
|
---|
| 381 | default:
|
---|
| 382 | bb_error_msg_and_die("can't determine tunnel mode (ipip, gre or sit)");
|
---|
| 383 | }
|
---|
| 384 | }
|
---|
| 385 |
|
---|
| 386 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 387 | static int do_del(char **argv)
|
---|
| 388 | {
|
---|
| 389 | struct ip_tunnel_parm p;
|
---|
| 390 |
|
---|
| 391 | parse_args(argv, SIOCDELTUNNEL, &p);
|
---|
| 392 |
|
---|
| 393 | switch (p.iph.protocol) {
|
---|
| 394 | case IPPROTO_IPIP:
|
---|
| 395 | return do_del_ioctl("tunl0", &p);
|
---|
| 396 | case IPPROTO_GRE:
|
---|
| 397 | return do_del_ioctl("gre0", &p);
|
---|
| 398 | case IPPROTO_IPV6:
|
---|
| 399 | return do_del_ioctl("sit0", &p);
|
---|
| 400 | default:
|
---|
| 401 | return do_del_ioctl(p.name, &p);
|
---|
| 402 | }
|
---|
| 403 | }
|
---|
| 404 |
|
---|
| 405 | static void print_tunnel(struct ip_tunnel_parm *p)
|
---|
| 406 | {
|
---|
| 407 | char s1[256];
|
---|
| 408 | char s2[256];
|
---|
| 409 | char s3[64];
|
---|
| 410 | char s4[64];
|
---|
| 411 |
|
---|
| 412 | format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1));
|
---|
| 413 | format_host(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2));
|
---|
| 414 | inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
|
---|
| 415 | inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));
|
---|
| 416 |
|
---|
| 417 | printf("%s: %s/ip remote %s local %s ",
|
---|
| 418 | p->name,
|
---|
| 419 | p->iph.protocol == IPPROTO_IPIP ? "ip" :
|
---|
| 420 | (p->iph.protocol == IPPROTO_GRE ? "gre" :
|
---|
| 421 | (p->iph.protocol == IPPROTO_IPV6 ? "ipv6" : "unknown")),
|
---|
| 422 | p->iph.daddr ? s1 : "any", p->iph.saddr ? s2 : "any");
|
---|
| 423 | if (p->link) {
|
---|
| 424 | char *n = do_ioctl_get_ifname(p->link);
|
---|
| 425 | if (n) {
|
---|
| 426 | printf(" dev %s ", n);
|
---|
| 427 | free(n);
|
---|
| 428 | }
|
---|
| 429 | }
|
---|
| 430 | if (p->iph.ttl)
|
---|
| 431 | printf(" ttl %d ", p->iph.ttl);
|
---|
| 432 | else
|
---|
| 433 | printf(" ttl inherit ");
|
---|
| 434 | if (p->iph.tos) {
|
---|
| 435 | SPRINT_BUF(b1);
|
---|
| 436 | printf(" tos");
|
---|
| 437 | if (p->iph.tos & 1)
|
---|
| 438 | printf(" inherit");
|
---|
| 439 | if (p->iph.tos & ~1)
|
---|
| 440 | printf("%c%s ", p->iph.tos & 1 ? '/' : ' ',
|
---|
| 441 | rtnl_dsfield_n2a(p->iph.tos & ~1, b1));
|
---|
| 442 | }
|
---|
| 443 | if (!(p->iph.frag_off & htons(IP_DF)))
|
---|
| 444 | printf(" nopmtudisc");
|
---|
| 445 |
|
---|
| 446 | if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key)
|
---|
| 447 | printf(" key %s", s3);
|
---|
| 448 | else if ((p->i_flags | p->o_flags) & GRE_KEY) {
|
---|
| 449 | if (p->i_flags & GRE_KEY)
|
---|
| 450 | printf(" ikey %s ", s3);
|
---|
| 451 | if (p->o_flags & GRE_KEY)
|
---|
| 452 | printf(" okey %s ", s4);
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | if (p->i_flags & GRE_SEQ)
|
---|
| 456 | printf("%c Drop packets out of sequence.\n", _SL_);
|
---|
| 457 | if (p->i_flags & GRE_CSUM)
|
---|
| 458 | printf("%c Checksum in received packet is required.", _SL_);
|
---|
| 459 | if (p->o_flags & GRE_SEQ)
|
---|
| 460 | printf("%c Sequence packets on output.", _SL_);
|
---|
| 461 | if (p->o_flags & GRE_CSUM)
|
---|
| 462 | printf("%c Checksum output packets.", _SL_);
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | static void do_tunnels_list(struct ip_tunnel_parm *p)
|
---|
| 466 | {
|
---|
| 467 | char name[IFNAMSIZ];
|
---|
| 468 | unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
|
---|
| 469 | rx_fifo, rx_frame,
|
---|
| 470 | tx_bytes, tx_packets, tx_errs, tx_drops,
|
---|
| 471 | tx_fifo, tx_colls, tx_carrier, rx_multi;
|
---|
| 472 | int type;
|
---|
| 473 | struct ip_tunnel_parm p1;
|
---|
| 474 | char buf[512];
|
---|
| 475 | FILE *fp = fopen_or_warn("/proc/net/dev", "r");
|
---|
| 476 |
|
---|
| 477 | if (fp == NULL) {
|
---|
| 478 | return;
|
---|
| 479 | }
|
---|
| 480 | /* skip headers */
|
---|
| 481 | fgets(buf, sizeof(buf), fp);
|
---|
| 482 | fgets(buf, sizeof(buf), fp);
|
---|
| 483 |
|
---|
| 484 | while (fgets(buf, sizeof(buf), fp) != NULL) {
|
---|
| 485 | char *ptr;
|
---|
| 486 |
|
---|
| 487 | /*buf[sizeof(buf) - 1] = 0; - fgets is safe anyway */
|
---|
| 488 | ptr = strchr(buf, ':');
|
---|
| 489 | if (ptr == NULL ||
|
---|
| 490 | (*ptr++ = 0, sscanf(buf, "%s", name) != 1)
|
---|
| 491 | ) {
|
---|
| 492 | bb_error_msg("wrong format of /proc/net/dev");
|
---|
| 493 | return;
|
---|
| 494 | }
|
---|
| 495 | if (sscanf(ptr, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
|
---|
| 496 | &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
|
---|
| 497 | &rx_fifo, &rx_frame, &rx_multi,
|
---|
| 498 | &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
|
---|
| 499 | &tx_fifo, &tx_colls, &tx_carrier) != 14)
|
---|
| 500 | continue;
|
---|
| 501 | if (p->name[0] && strcmp(p->name, name))
|
---|
| 502 | continue;
|
---|
| 503 | type = do_ioctl_get_iftype(name);
|
---|
| 504 | if (type == -1) {
|
---|
| 505 | bb_error_msg("can't get type of [%s]", name);
|
---|
| 506 | continue;
|
---|
| 507 | }
|
---|
| 508 | if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
|
---|
| 509 | continue;
|
---|
| 510 | memset(&p1, 0, sizeof(p1));
|
---|
| 511 | if (do_get_ioctl(name, &p1))
|
---|
| 512 | continue;
|
---|
| 513 | if ((p->link && p1.link != p->link) ||
|
---|
| 514 | (p->name[0] && strcmp(p1.name, p->name)) ||
|
---|
| 515 | (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
|
---|
| 516 | (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
|
---|
| 517 | (p->i_key && p1.i_key != p->i_key)
|
---|
| 518 | ) {
|
---|
| 519 | continue;
|
---|
| 520 | }
|
---|
| 521 | print_tunnel(&p1);
|
---|
| 522 | bb_putchar('\n');
|
---|
| 523 | }
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 527 | static int do_show(char **argv)
|
---|
| 528 | {
|
---|
| 529 | int err;
|
---|
| 530 | struct ip_tunnel_parm p;
|
---|
| 531 |
|
---|
| 532 | parse_args(argv, SIOCGETTUNNEL, &p);
|
---|
| 533 |
|
---|
| 534 | switch (p.iph.protocol) {
|
---|
| 535 | case IPPROTO_IPIP:
|
---|
| 536 | err = do_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
|
---|
| 537 | break;
|
---|
| 538 | case IPPROTO_GRE:
|
---|
| 539 | err = do_get_ioctl(p.name[0] ? p.name : "gre0", &p);
|
---|
| 540 | break;
|
---|
| 541 | case IPPROTO_IPV6:
|
---|
| 542 | err = do_get_ioctl(p.name[0] ? p.name : "sit0", &p);
|
---|
| 543 | break;
|
---|
| 544 | default:
|
---|
| 545 | do_tunnels_list(&p);
|
---|
| 546 | return 0;
|
---|
| 547 | }
|
---|
| 548 | if (err)
|
---|
| 549 | return -1;
|
---|
| 550 |
|
---|
| 551 | print_tunnel(&p);
|
---|
| 552 | bb_putchar('\n');
|
---|
| 553 | return 0;
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 | /* Return value becomes exitcode. It's okay to not return at all */
|
---|
| 557 | int FAST_FUNC do_iptunnel(char **argv)
|
---|
| 558 | {
|
---|
| 559 | static const char keywords[] ALIGN1 =
|
---|
| 560 | "add\0""change\0""delete\0""show\0""list\0""lst\0";
|
---|
| 561 | enum { ARG_add = 0, ARG_change, ARG_del, ARG_show, ARG_list, ARG_lst };
|
---|
| 562 |
|
---|
| 563 | if (*argv) {
|
---|
| 564 | smalluint key = index_in_substrings(keywords, *argv);
|
---|
| 565 | if (key > 5)
|
---|
| 566 | bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
|
---|
| 567 | argv++;
|
---|
| 568 | if (key == ARG_add)
|
---|
| 569 | return do_add(SIOCADDTUNNEL, argv);
|
---|
| 570 | if (key == ARG_change)
|
---|
| 571 | return do_add(SIOCCHGTUNNEL, argv);
|
---|
| 572 | if (key == ARG_del)
|
---|
| 573 | return do_del(argv);
|
---|
| 574 | }
|
---|
| 575 | return do_show(argv);
|
---|
| 576 | }
|
---|