1/* $USAGI: $ */ 2 3/* 4 * Copyright (C)2004 USAGI/WIDE Project 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20/* 21 * based on iproute.c 22 */ 23/* 24 * Authors: 25 * Masahide NAKAMURA @USAGI 26 */ 27 28#include <stdio.h> 29#include <stdlib.h> 30#include <string.h> 31#include <netdb.h> 32#include <linux/xfrm.h> 33#include "utils.h" 34#include "xfrm.h" 35#include "ip_common.h" 36 37//#define NLMSG_DELETEALL_BUF_SIZE (4096-512) 38#define NLMSG_DELETEALL_BUF_SIZE 8192 39 40/* 41 * Receiving buffer defines: 42 * nlmsg 43 * data = struct xfrm_usersa_info 44 * rtattr 45 * rtattr 46 * ... (max count of rtattr is XFRM_MAX+1 47 * 48 * each rtattr data = struct xfrm_algo(dynamic size) or xfrm_address_t 49 */ 50#define NLMSG_BUF_SIZE 4096 51#define RTA_BUF_SIZE 2048 52#define XFRM_ALGO_KEY_BUF_SIZE 512 53 54static void usage(void) __attribute__((noreturn)); 55 56static void usage(void) 57{ 58 fprintf(stderr, "Usage: ip xfrm state { add | update } ID [ ALGO-LIST ] [ mode MODE ]\n"); 59 fprintf(stderr, " [ reqid REQID ] [ seq SEQ ] [ replay-window SIZE ] [ flag FLAG-LIST ]\n"); 60 fprintf(stderr, " [ encap ENCAP ] [ sel SELECTOR ] [ LIMIT-LIST ]\n"); 61 fprintf(stderr, "Usage: ip xfrm state allocspi ID [ mode MODE ] [ reqid REQID ] [ seq SEQ ]\n"); 62 fprintf(stderr, " [ min SPI max SPI ]\n"); 63 fprintf(stderr, "Usage: ip xfrm state { delete | get } ID\n"); 64 fprintf(stderr, "Usage: ip xfrm state { deleteall | list } [ ID ] [ mode MODE ] [ reqid REQID ]\n"); 65 fprintf(stderr, " [ flag FLAG_LIST ]\n"); 66 fprintf(stderr, "Usage: ip xfrm state flush [ proto XFRM_PROTO ]\n"); 67 68 fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n"); 69 //fprintf(stderr, "XFRM_PROTO := [ esp | ah | comp ]\n"); 70 fprintf(stderr, "XFRM_PROTO := [ "); 71 fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ESP)); 72 fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_AH)); 73 fprintf(stderr, "%s ", strxf_xfrmproto(IPPROTO_COMP)); 74 fprintf(stderr, "]\n"); 75 76 //fprintf(stderr, "SPI - security parameter index(default=0)\n"); 77 78 fprintf(stderr, "MODE := [ transport | tunnel ](default=transport)\n"); 79 //fprintf(stderr, "REQID - number(default=0)\n"); 80 81 fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] FLAG\n"); 82 fprintf(stderr, "FLAG := [ noecn | decap-dscp ]\n"); 83 84 fprintf(stderr, "ENCAP := ENCAP-TYPE SPORT DPORT OADDR\n"); 85 fprintf(stderr, "ENCAP-TYPE := espinudp | espinudp-nonike\n"); 86 87 fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ ALGO ]\n"); 88 fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n"); 89 fprintf(stderr, "ALGO_TYPE := [ "); 90 fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT)); 91 fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH)); 92 fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP)); 93 fprintf(stderr, "]\n"); 94 95 //fprintf(stderr, "ALGO_NAME - algorithm name\n"); 96 //fprintf(stderr, "ALGO_KEY - algorithm key\n"); 97 98 fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ UPSPEC ] [ dev DEV ]\n"); 99 100 fprintf(stderr, "UPSPEC := proto PROTO [ [ sport PORT ] [ dport PORT ] |\n"); 101 fprintf(stderr, " [ type NUMBER ] [ code NUMBER ] ]\n"); 102 103 104 //fprintf(stderr, "DEV - device name(default=none)\n"); 105 fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] | [ limit LIMIT ]\n"); 106 fprintf(stderr, "LIMIT := [ [time-soft|time-hard|time-use-soft|time-use-hard] SECONDS ] |\n"); 107 fprintf(stderr, " [ [byte-soft|byte-hard] SIZE ] | [ [packet-soft|packet-hard] COUNT ]\n"); 108 exit(-1); 109} 110 111static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type, 112 char *name, char *key, int max) 113{ 114 int len; 115 int slen = strlen(key); 116 117#if 0 118 /* XXX: verifying both name and key is required! */ 119 fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n"); 120#endif 121 122 strncpy(alg->alg_name, name, sizeof(alg->alg_name)); 123 124 if (slen > 2 && strncmp(key, "0x", 2) == 0) { 125 /* split two chars "0x" from the top */ 126 char *p = key + 2; 127 int plen = slen - 2; 128 int i; 129 int j; 130 131 /* Converting hexadecimal numbered string into real key; 132 * Convert each two chars into one char(value). If number 133 * of the length is odd, add zero on the top for rounding. 134 */ 135 136 /* calculate length of the converted values(real key) */ 137 len = (plen + 1) / 2; 138 if (len > max) 139 invarg("\"ALGOKEY\" makes buffer overflow\n", key); 140 141 for (i = - (plen % 2), j = 0; j < len; i += 2, j++) { 142 char vbuf[3]; 143 __u8 val; 144 145 vbuf[0] = i >= 0 ? p[i] : '0'; 146 vbuf[1] = p[i + 1]; 147 vbuf[2] = '\0'; 148 149 if (get_u8(&val, vbuf, 16)) 150 invarg("\"ALGOKEY\" is invalid", key); 151 152 alg->alg_key[j] = val; 153 } 154 } else { 155 len = slen; 156 if (len > 0) { 157 if (len > max) 158 invarg("\"ALGOKEY\" makes buffer overflow\n", key); 159 160 strncpy(alg->alg_key, key, len); 161 } 162 } 163 164 alg->alg_key_len = len * 8; 165 166 return 0; 167} 168 169static int xfrm_seq_parse(__u32 *seq, int *argcp, char ***argvp) 170{ 171 int argc = *argcp; 172 char **argv = *argvp; 173 174 if (get_u32(seq, *argv, 0)) 175 invarg("\"SEQ\" is invalid", *argv); 176 177 *seq = htonl(*seq); 178 179 *argcp = argc; 180 *argvp = argv; 181 182 return 0; 183} 184 185static int xfrm_state_flag_parse(__u8 *flags, int *argcp, char ***argvp) 186{ 187 int argc = *argcp; 188 char **argv = *argvp; 189 int len = strlen(*argv); 190 191 if (len > 2 && strncmp(*argv, "0x", 2) == 0) { 192 __u8 val = 0; 193 194 if (get_u8(&val, *argv, 16)) 195 invarg("\"FLAG\" is invalid", *argv); 196 *flags = val; 197 } else { 198 while (1) { 199 if (strcmp(*argv, "noecn") == 0) 200 *flags |= XFRM_STATE_NOECN; 201 else if (strcmp(*argv, "decap-dscp") == 0) 202 *flags |= XFRM_STATE_DECAP_DSCP; 203 else { 204 PREV_ARG(); /* back track */ 205 break; 206 } 207 208 if (!NEXT_ARG_OK()) 209 break; 210 NEXT_ARG(); 211 } 212 } 213 214 filter.state_flags_mask = XFRM_FILTER_MASK_FULL; 215 216 *argcp = argc; 217 *argvp = argv; 218 219 return 0; 220} 221 222static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv) 223{ 224 struct rtnl_handle rth; 225 struct { 226 struct nlmsghdr n; 227 struct xfrm_usersa_info xsinfo; 228 char buf[RTA_BUF_SIZE]; 229 } req; 230 char *idp = NULL; 231 char *ealgop = NULL; 232 char *aalgop = NULL; 233 char *calgop = NULL; 234 235 memset(&req, 0, sizeof(req)); 236 237 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo)); 238 req.n.nlmsg_flags = NLM_F_REQUEST|flags; 239 req.n.nlmsg_type = cmd; 240 req.xsinfo.family = preferred_family; 241 242 req.xsinfo.lft.soft_byte_limit = XFRM_INF; 243 req.xsinfo.lft.hard_byte_limit = XFRM_INF; 244 req.xsinfo.lft.soft_packet_limit = XFRM_INF; 245 req.xsinfo.lft.hard_packet_limit = XFRM_INF; 246 247 while (argc > 0) { 248 if (strcmp(*argv, "mode") == 0) { 249 NEXT_ARG(); 250 xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv); 251 } else if (strcmp(*argv, "reqid") == 0) { 252 NEXT_ARG(); 253 xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv); 254 } else if (strcmp(*argv, "seq") == 0) { 255 NEXT_ARG(); 256 xfrm_seq_parse(&req.xsinfo.seq, &argc, &argv); 257 } else if (strcmp(*argv, "replay-window") == 0) { 258 NEXT_ARG(); 259 if (get_u8(&req.xsinfo.replay_window, *argv, 0)) 260 invarg("\"replay-window\" value is invalid", *argv); 261 } else if (strcmp(*argv, "flag") == 0) { 262 NEXT_ARG(); 263 xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv); 264 } else if (strcmp(*argv, "sel") == 0) { 265 NEXT_ARG(); 266 xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv); 267 } else if (strcmp(*argv, "limit") == 0) { 268 NEXT_ARG(); 269 xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv); 270 } else if (strcmp(*argv, "encap") == 0) { 271 struct xfrm_encap_tmpl encap; 272 inet_prefix oa; 273 NEXT_ARG(); 274 xfrm_encap_type_parse(&encap.encap_type, &argc, &argv); 275 NEXT_ARG(); 276 if (get_u16(&encap.encap_sport, *argv, 0)) 277 invarg("\"encap\" sport value is invalid", *argv); 278 encap.encap_sport = htons(encap.encap_sport); 279 NEXT_ARG(); 280 if (get_u16(&encap.encap_dport, *argv, 0)) 281 invarg("\"encap\" dport value is invalid", *argv); 282 encap.encap_dport = htons(encap.encap_dport); 283 NEXT_ARG(); 284 get_addr(&oa, *argv, AF_UNSPEC); 285 memcpy(&encap.encap_oa, &oa.data, sizeof(encap.encap_oa)); 286 addattr_l(&req.n, sizeof(req.buf), XFRMA_ENCAP, 287 (void *)&encap, sizeof(encap)); 288 } else { 289 /* try to assume ALGO */ 290 int type = xfrm_algotype_getbyname(*argv); 291 switch (type) { 292 case XFRMA_ALG_CRYPT: 293 case XFRMA_ALG_AUTH: 294 case XFRMA_ALG_COMP: 295 { 296 /* ALGO */ 297 struct { 298 struct xfrm_algo alg; 299 char buf[XFRM_ALGO_KEY_BUF_SIZE]; 300 } alg; 301 int len; 302 char *name; 303 char *key; 304 305 switch (type) { 306 case XFRMA_ALG_CRYPT: 307 if (ealgop) 308 duparg("ALGOTYPE", *argv); 309 ealgop = *argv; 310 break; 311 case XFRMA_ALG_AUTH: 312 if (aalgop) 313 duparg("ALGOTYPE", *argv); 314 aalgop = *argv; 315 break; 316 case XFRMA_ALG_COMP: 317 if (calgop) 318 duparg("ALGOTYPE", *argv); 319 calgop = *argv; 320 break; 321 default: 322 /* not reached */ 323 invarg("\"ALGOTYPE\" is invalid\n", *argv); 324 } 325 326 if (!NEXT_ARG_OK()) 327 missarg("ALGONAME"); 328 NEXT_ARG(); 329 name = *argv; 330 331 if (!NEXT_ARG_OK()) 332 missarg("ALGOKEY"); 333 NEXT_ARG(); 334 key = *argv; 335 336 memset(&alg, 0, sizeof(alg)); 337 338 xfrm_algo_parse((void *)&alg, type, name, key, 339 sizeof(alg.buf)); 340 len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len; 341 342 addattr_l(&req.n, sizeof(req.buf), type, 343 (void *)&alg, len); 344 break; 345 } 346 default: 347 /* try to assume ID */ 348 if (idp) 349 invarg("unknown", *argv); 350 idp = *argv; 351 352 /* ID */ 353 xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id, 354 &req.xsinfo.family, 0, &argc, &argv); 355 if (preferred_family == AF_UNSPEC) 356 preferred_family = req.xsinfo.family; 357 } 358 } 359 argc--; argv++; 360 } 361 362 if (!idp) { 363 fprintf(stderr, "Not enough information: \"ID\" is required\n"); 364 exit(1); 365 } 366 367 if (ealgop || aalgop || calgop) { 368 if (req.xsinfo.id.proto != IPPROTO_ESP && 369 req.xsinfo.id.proto != IPPROTO_AH && 370 req.xsinfo.id.proto != IPPROTO_COMP) { 371 fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n", strxf_xfrmproto(req.xsinfo.id.proto)); 372 exit(1); 373 } 374 } else { 375 if (req.xsinfo.id.proto == IPPROTO_ESP || 376 req.xsinfo.id.proto == IPPROTO_AH || 377 req.xsinfo.id.proto == IPPROTO_COMP) { 378 fprintf(stderr, "\"ALGO\" is required with proto=%s\n", strxf_xfrmproto(req.xsinfo.id.proto)); 379 exit (1); 380 } 381 } 382 383 if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0) 384 exit(1); 385 386 if (req.xsinfo.family == AF_UNSPEC) 387 req.xsinfo.family = AF_INET; 388 389 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) 390 exit(2); 391 392 rtnl_close(&rth); 393 394 return 0; 395} 396 397static int xfrm_state_allocspi(int argc, char **argv) 398{ 399 struct rtnl_handle rth; 400 struct { 401 struct nlmsghdr n; 402 struct xfrm_userspi_info xspi; 403 char buf[RTA_BUF_SIZE]; 404 } req; 405 char *idp = NULL; 406 char *minp = NULL; 407 char *maxp = NULL; 408 char res_buf[NLMSG_BUF_SIZE]; 409 struct nlmsghdr *res_n = (struct nlmsghdr *)res_buf; 410 411 memset(res_buf, 0, sizeof(res_buf)); 412 413 memset(&req, 0, sizeof(req)); 414 415 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xspi)); 416 req.n.nlmsg_flags = NLM_F_REQUEST; 417 req.n.nlmsg_type = XFRM_MSG_ALLOCSPI; 418 req.xspi.info.family = preferred_family; 419 420#if 0 421 req.xsinfo.lft.soft_byte_limit = XFRM_INF; 422 req.xsinfo.lft.hard_byte_limit = XFRM_INF; 423 req.xsinfo.lft.soft_packet_limit = XFRM_INF; 424 req.xsinfo.lft.hard_packet_limit = XFRM_INF; 425#endif 426 427 while (argc > 0) { 428 if (strcmp(*argv, "mode") == 0) { 429 NEXT_ARG(); 430 xfrm_mode_parse(&req.xspi.info.mode, &argc, &argv); 431 } else if (strcmp(*argv, "reqid") == 0) { 432 NEXT_ARG(); 433 xfrm_reqid_parse(&req.xspi.info.reqid, &argc, &argv); 434 } else if (strcmp(*argv, "seq") == 0) { 435 NEXT_ARG(); 436 xfrm_seq_parse(&req.xspi.info.seq, &argc, &argv); 437 } else if (strcmp(*argv, "min") == 0) { 438 if (minp) 439 duparg("min", *argv); 440 minp = *argv; 441 442 NEXT_ARG(); 443 444 if (get_u32(&req.xspi.min, *argv, 0)) 445 invarg("\"min\" value is invalid", *argv); 446 } else if (strcmp(*argv, "max") == 0) { 447 if (maxp) 448 duparg("max", *argv); 449 maxp = *argv; 450 451 NEXT_ARG(); 452 453 if (get_u32(&req.xspi.max, *argv, 0)) 454 invarg("\"max\" value is invalid", *argv); 455 } else { 456 /* try to assume ID */ 457 if (idp) 458 invarg("unknown", *argv); 459 idp = *argv; 460 461 /* ID */ 462 xfrm_id_parse(&req.xspi.info.saddr, &req.xspi.info.id, 463 &req.xspi.info.family, 0, &argc, &argv); 464 if (req.xspi.info.id.spi) { 465 fprintf(stderr, "\"SPI\" must be zero\n"); 466 exit(1); 467 } 468 if (preferred_family == AF_UNSPEC) 469 preferred_family = req.xspi.info.family; 470 } 471 argc--; argv++; 472 } 473 474 if (!idp) { 475 fprintf(stderr, "Not enough information: \"ID\" is required\n"); 476 exit(1); 477 } 478 479 if (minp) { 480 if (!maxp) { 481 fprintf(stderr, "\"max\" is missing\n"); 482 exit(1); 483 } 484 if (req.xspi.min > req.xspi.max) { 485 fprintf(stderr, "\"min\" valie is larger than \"max\" one\n"); 486 exit(1); 487 } 488 } else { 489 if (maxp) { 490 fprintf(stderr, "\"min\" is missing\n"); 491 exit(1); 492 } 493 494 /* XXX: Default value defined in PF_KEY; 495 * See kernel's net/key/af_key.c(pfkey_getspi). 496 */ 497 req.xspi.min = 0x100; 498 req.xspi.max = 0x0fffffff; 499 500 /* XXX: IPCOMP spi is 16-bits; 501 * See kernel's net/xfrm/xfrm_user(verify_userspi_info). 502 */ 503 if (req.xspi.info.id.proto == IPPROTO_COMP) 504 req.xspi.max = 0xffff; 505 } 506 507 if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0) 508 exit(1); 509 510 if (req.xspi.info.family == AF_UNSPEC) 511 req.xspi.info.family = AF_INET; 512 513 514 if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0) 515 exit(2); 516 517 if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) { 518 fprintf(stderr, "An error :-)\n"); 519 exit(1); 520 } 521 522 rtnl_close(&rth); 523 524 return 0; 525} 526 527static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo) 528{ 529 if (!filter.use) 530 return 1; 531 532 if (filter.id_src_mask) 533 if (xfrm_addr_match(&xsinfo->saddr, &filter.xsinfo.saddr, 534 filter.id_src_mask)) 535 return 0; 536 if (filter.id_dst_mask) 537 if (xfrm_addr_match(&xsinfo->id.daddr, &filter.xsinfo.id.daddr, 538 filter.id_dst_mask)) 539 return 0; 540 if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask) 541 return 0; 542 if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask) 543 return 0; 544 if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask) 545 return 0; 546 if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask) 547 return 0; 548 if (filter.state_flags_mask) 549 if ((xsinfo->flags & filter.xsinfo.flags) == 0) 550 return 0; 551 552 return 1; 553} 554 555int xfrm_state_print(const struct sockaddr_nl *who, struct nlmsghdr *n, 556 void *arg) 557{ 558 FILE *fp = (FILE*)arg; 559 struct xfrm_usersa_info *xsinfo; 560 struct xfrm_user_expire *xexp; 561 int len = n->nlmsg_len; 562 struct rtattr * tb[XFRMA_MAX+1]; 563 struct rtattr * rta; 564 565 if (n->nlmsg_type != XFRM_MSG_NEWSA && 566 n->nlmsg_type != XFRM_MSG_DELSA && 567 n->nlmsg_type != XFRM_MSG_EXPIRE) { 568 fprintf(stderr, "Not a state: %08x %08x %08x\n", 569 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); 570 return 0; 571 } 572 573 if (n->nlmsg_type == XFRM_MSG_EXPIRE) { 574 xexp = NLMSG_DATA(n); 575 xsinfo = &xexp->state; 576 577 len -= NLMSG_LENGTH(sizeof(*xexp)); 578 } else { 579 xexp = NULL; 580 xsinfo = NLMSG_DATA(n); 581 582 len -= NLMSG_LENGTH(sizeof(*xsinfo)); 583 } 584 585 if (len < 0) { 586 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); 587 return -1; 588 } 589 590 if (!xfrm_state_filter_match(xsinfo)) 591 return 0; 592 593 if (n->nlmsg_type == XFRM_MSG_EXPIRE) 594 rta = XFRMEXP_RTA(xexp); 595 else 596 rta = XFRMS_RTA(xsinfo); 597 598 parse_rtattr(tb, XFRMA_MAX, rta, len); 599 600 if (n->nlmsg_type == XFRM_MSG_DELSA) 601 fprintf(fp, "Deleted "); 602 else if (n->nlmsg_type == XFRM_MSG_EXPIRE) 603 fprintf(fp, "Expired "); 604 605 xfrm_state_info_print(xsinfo, tb, fp, NULL, NULL); 606 607 if (n->nlmsg_type == XFRM_MSG_EXPIRE) { 608 fprintf(fp, "\t"); 609 fprintf(fp, "hard %u", xexp->hard); 610 fprintf(fp, "%s", _SL_); 611 } 612 613 if (oneline) 614 fprintf(fp, "\n"); 615 616 return 0; 617} 618 619static int xfrm_state_get_or_delete(int argc, char **argv, int delete) 620{ 621 struct rtnl_handle rth; 622 struct { 623 struct nlmsghdr n; 624 struct xfrm_usersa_id xsid; 625 } req; 626 struct xfrm_id id; 627 char *idp = NULL; 628 629 memset(&req, 0, sizeof(req)); 630 631 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid)); 632 req.n.nlmsg_flags = NLM_F_REQUEST; 633 req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA; 634 req.xsid.family = preferred_family; 635 636 while (argc > 0) { 637 /* 638 * XXX: Source address is not used and ignore it to follow 639 * XXX: a manner of setkey e.g. in the case of deleting/getting 640 * XXX: message of IPsec SA. 641 */ 642 xfrm_address_t ignore_saddr; 643 644 if (idp) 645 invarg("unknown", *argv); 646 idp = *argv; 647 648 /* ID */ 649 memset(&id, 0, sizeof(id)); 650 xfrm_id_parse(&ignore_saddr, &id, &req.xsid.family, 0, 651 &argc, &argv); 652 653 memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr)); 654 req.xsid.spi = id.spi; 655 req.xsid.proto = id.proto; 656 657 argc--; argv++; 658 } 659 660 if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0) 661 exit(1); 662 663 if (req.xsid.family == AF_UNSPEC) 664 req.xsid.family = AF_INET; 665 666 if (delete) { 667 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) 668 exit(2); 669 } else { 670 char buf[NLMSG_BUF_SIZE]; 671 struct nlmsghdr *res_n = (struct nlmsghdr *)buf; 672 673 memset(buf, 0, sizeof(buf)); 674 675 if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0) 676 exit(2); 677 678 if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) { 679 fprintf(stderr, "An error :-)\n"); 680 exit(1); 681 } 682 } 683 684 rtnl_close(&rth); 685 686 return 0; 687} 688 689/* 690 * With an existing state of nlmsg, make new nlmsg for deleting the state 691 * and store it to buffer. 692 */ 693static int xfrm_state_keep(const struct sockaddr_nl *who, 694 struct nlmsghdr *n, 695 void *arg) 696{ 697 struct xfrm_buffer *xb = (struct xfrm_buffer *)arg; 698 struct rtnl_handle *rth = xb->rth; 699 struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n); 700 int len = n->nlmsg_len; 701 struct nlmsghdr *new_n; 702 struct xfrm_usersa_id *xsid; 703 704 if (n->nlmsg_type != XFRM_MSG_NEWSA) { 705 fprintf(stderr, "Not a state: %08x %08x %08x\n", 706 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); 707 return 0; 708 } 709 710 len -= NLMSG_LENGTH(sizeof(*xsinfo)); 711 if (len < 0) { 712 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); 713 return -1; 714 } 715 716 if (!xfrm_state_filter_match(xsinfo)) 717 return 0; 718 719 if (xb->offset > xb->size) { 720 fprintf(stderr, "State buffer overflow\n"); 721 return -1; 722 } 723 724 new_n = (struct nlmsghdr *)(xb->buf + xb->offset); 725 new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid)); 726 new_n->nlmsg_flags = NLM_F_REQUEST; 727 new_n->nlmsg_type = XFRM_MSG_DELSA; 728 new_n->nlmsg_seq = ++rth->seq; 729 730 xsid = NLMSG_DATA(new_n); 731 xsid->family = xsinfo->family; 732 memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr)); 733 xsid->spi = xsinfo->id.spi; 734 xsid->proto = xsinfo->id.proto; 735 736 xb->offset += new_n->nlmsg_len; 737 xb->nlmsg_count ++; 738 739 return 0; 740} 741 742static int xfrm_state_list_or_deleteall(int argc, char **argv, int deleteall) 743{ 744 char *idp = NULL; 745 struct rtnl_handle rth; 746 747 if(argc > 0) 748 filter.use = 1; 749 filter.xsinfo.family = preferred_family; 750 751 while (argc > 0) { 752 if (strcmp(*argv, "mode") == 0) { 753 NEXT_ARG(); 754 xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv); 755 756 filter.mode_mask = XFRM_FILTER_MASK_FULL; 757 758 } else if (strcmp(*argv, "reqid") == 0) { 759 NEXT_ARG(); 760 xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv); 761 762 filter.reqid_mask = XFRM_FILTER_MASK_FULL; 763 764 } else if (strcmp(*argv, "flag") == 0) { 765 NEXT_ARG(); 766 xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv); 767 768 filter.state_flags_mask = XFRM_FILTER_MASK_FULL; 769 770 } else { 771 if (idp) 772 invarg("unknown", *argv); 773 idp = *argv; 774 775 /* ID */ 776 xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id, 777 &filter.xsinfo.family, 1, &argc, &argv); 778 if (preferred_family == AF_UNSPEC) 779 preferred_family = filter.xsinfo.family; 780 } 781 argc--; argv++; 782 } 783 784 if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0) 785 exit(1); 786 787 if (deleteall) { 788 struct xfrm_buffer xb; 789 char buf[NLMSG_DELETEALL_BUF_SIZE]; 790 int i; 791 792 xb.buf = buf; 793 xb.size = sizeof(buf); 794 xb.rth = &rth; 795 796 for (i = 0; ; i++) { 797 xb.offset = 0; 798 xb.nlmsg_count = 0; 799 800 if (show_stats > 1) 801 fprintf(stderr, "Delete-all round = %d\n", i); 802 803 if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) { 804 perror("Cannot send dump request"); 805 exit(1); 806 } 807 808 if (rtnl_dump_filter(&rth, xfrm_state_keep, &xb, NULL, NULL) < 0) { 809 fprintf(stderr, "Delete-all terminated\n"); 810 exit(1); 811 } 812 if (xb.nlmsg_count == 0) { 813 if (show_stats > 1) 814 fprintf(stderr, "Delete-all completed\n"); 815 break; 816 } 817 818 if (rtnl_send(&rth, xb.buf, xb.offset) < 0) { 819 perror("Failed to send delete-all request\n"); 820 exit(1); 821 } 822 if (show_stats > 1) 823 fprintf(stderr, "Delete-all nlmsg count = %d\n", xb.nlmsg_count); 824 825 xb.offset = 0; 826 xb.nlmsg_count = 0; 827 } 828 829 } else { 830 if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) { 831 perror("Cannot send dump request"); 832 exit(1); 833 } 834 835 if (rtnl_dump_filter(&rth, xfrm_state_print, stdout, NULL, NULL) < 0) { 836 fprintf(stderr, "Dump terminated\n"); 837 exit(1); 838 } 839 } 840 841 rtnl_close(&rth); 842 843 exit(0); 844} 845 846static int xfrm_state_flush(int argc, char **argv) 847{ 848 struct rtnl_handle rth; 849 struct { 850 struct nlmsghdr n; 851 struct xfrm_usersa_flush xsf; 852 } req; 853 char *protop = NULL; 854 855 memset(&req, 0, sizeof(req)); 856 857 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf)); 858 req.n.nlmsg_flags = NLM_F_REQUEST; 859 req.n.nlmsg_type = XFRM_MSG_FLUSHSA; 860 req.xsf.proto = IPSEC_PROTO_ANY; 861 862 while (argc > 0) { 863 if (strcmp(*argv, "proto") == 0) { 864 int ret; 865 866 if (protop) 867 duparg("proto", *argv); 868 protop = *argv; 869 870 NEXT_ARG(); 871 872 ret = xfrm_xfrmproto_getbyname(*argv); 873 if (ret < 0) 874 invarg("\"XFRM_PROTO\" is invalid", *argv); 875 876 req.xsf.proto = (__u8)ret; 877 } else 878 invarg("unknown", *argv); 879 880 argc--; argv++; 881 } 882 883 if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0) 884 exit(1); 885 886 if (show_stats > 1) 887 fprintf(stderr, "Flush state proto=%s\n", 888 (req.xsf.proto == IPSEC_PROTO_ANY) ? "any" : 889 strxf_xfrmproto(req.xsf.proto)); 890 891 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) 892 exit(2); 893 894 rtnl_close(&rth); 895 896 return 0; 897} 898 899int do_xfrm_state(int argc, char **argv) 900{ 901 if (argc < 1) 902 return xfrm_state_list_or_deleteall(0, NULL, 0); 903 904 if (matches(*argv, "add") == 0) 905 return xfrm_state_modify(XFRM_MSG_NEWSA, 0, 906 argc-1, argv+1); 907 if (matches(*argv, "update") == 0) 908 return xfrm_state_modify(XFRM_MSG_UPDSA, 0, 909 argc-1, argv+1); 910 if (matches(*argv, "allocspi") == 0) 911 return xfrm_state_allocspi(argc-1, argv+1); 912 if (matches(*argv, "delete") == 0) 913 return xfrm_state_get_or_delete(argc-1, argv+1, 1); 914 if (matches(*argv, "deleteall") == 0 || matches(*argv, "delall") == 0) 915 return xfrm_state_list_or_deleteall(argc-1, argv+1, 1); 916 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 917 || matches(*argv, "lst") == 0) 918 return xfrm_state_list_or_deleteall(argc-1, argv+1, 0); 919 if (matches(*argv, "get") == 0) 920 return xfrm_state_get_or_delete(argc-1, argv+1, 0); 921 if (matches(*argv, "flush") == 0) 922 return xfrm_state_flush(argc-1, argv+1); 923 if (matches(*argv, "help") == 0) 924 usage(); 925 fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv); 926 exit(-1); 927} 928