ip/xfrm_state.c

   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_FLUSH_BUF_SIZE (4096-512)
  38 #define NLMSG_FLUSH_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_DEPTH)
  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
  54 static void usage(void) __attribute__((noreturn));
  55
  56 static void usage(void)
  57 {
  58         fprintf(stderr, "Usage: ip xfrm state { add | update } ID [ ALGO-LIST ] [ mode MODE ]\n");
  59         fprintf(stderr, "        [ reqid REQID ] [ FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ]\n");
  60
  61         fprintf(stderr, "Usage: ip xfrm state { delete | get } ID\n");
  62         fprintf(stderr, "Usage: ip xfrm state { flush | list } [ ID ] [ mode MODE ] [ reqid REQID ]\n");
  63         fprintf(stderr, "        [ FLAG_LIST ]\n");
  64
  65         fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
  66         //fprintf(stderr, "XFRM_PROTO := [ esp | ah | ipcomp ]\n");
  67         fprintf(stderr, "XFRM_PROTO := [ ");
  68         fprintf(stderr, "%s | ", strxf_proto(IPPROTO_ESP));
  69         fprintf(stderr, "%s | ", strxf_proto(IPPROTO_AH));
  70         fprintf(stderr, "%s ", strxf_proto(IPPROTO_COMP));
  71         fprintf(stderr, "]\n");
  72
  73         //fprintf(stderr, "SPI - security parameter index(default=0)\n");
  74
  75         fprintf(stderr, "MODE := [ transport | tunnel ](default=transport)\n");
  76         //fprintf(stderr, "REQID - number(default=0)\n");
  77
  78         fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] [ flag FLAG ]\n");
  79         fprintf(stderr, "FLAG := [ noecn ]\n");
  80
  81         fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ ALGO ]\n");
  82         fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
  83         fprintf(stderr, "ALGO_TYPE := [ ");
  84         fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT));
  85         fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH));
  86         fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP));
  87         fprintf(stderr, "]\n");
  88
  89         //fprintf(stderr, "ALGO_NAME - algorithm name\n");
  90         //fprintf(stderr, "ALGO_KEY - algorithm key\n");
  91
  92         fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ upspec UPSPEC ] [ dev DEV ]\n");
  93
  94         fprintf(stderr, "UPSPEC := proto PROTO [ sport PORT ] [ dport PORT ]\n");
  95
  96         //fprintf(stderr, "DEV - device name(default=none)\n");
  97         fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] | [ limit LIMIT ]\n");
  98         fprintf(stderr, "LIMIT := [ [time-soft|time-hard|time-use-soft|time-use-hard] SECONDS ] |\n");
  99         fprintf(stderr, "         [ [byte-soft|byte-hard] SIZE ] | [ [packet-soft|packet-hard] COUNT ]\n");
 100         exit(-1);
 101 }
 102
 103 static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
 104                            char *name, char *key, int max)
 105 {
 106         int len;
 107         int slen = strlen(key);
 108
 109 #if 1
 110         /* XXX: verifying both name and key is required! */
 111         fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n");
 112 #endif
 113
 114         strncpy(alg->alg_name, name, sizeof(alg->alg_name));
 115
 116         if (slen > 2 && strncmp(key, "0x", 2) == 0) {
 117                 /* split two chars "0x" from the top */
 118                 char *p = key + 2;
 119                 int plen = slen - 2;
 120                 int i;
 121                 int j;
 122
 123                 /* Converting hexadecimal numbered string into real key;
 124                  * Convert each two chars into one char(value). If number
 125                  * of the length is odd, add zero on the top for rounding.
 126                  */
 127
 128                 /* calculate length of the converted values(real key) */
 129                 len = (plen + 1) / 2;
 130                 if (len > max)
 131                         invarg("\"ALGOKEY\" makes buffer overflow\n", key);
 132
 133                 for (i = - (plen % 2), j = 0; j < len; i += 2, j++) {
 134                         char vbuf[3];
 135                         char val;
 136
 137                         vbuf[0] = i >= 0 ? p[i] : '0';
 138                         vbuf[1] = p[i + 1];
 139                         vbuf[2] = '\0';
 140
 141                         if (get_u8(&val, vbuf, 16))
 142                                 invarg("\"ALGOKEY\" is invalid", key);
 143
 144                         alg->alg_key[j] = val;
 145                 }
 146         } else {
 147                 len = slen;
 148                 if (len > 0) {
 149                         if (len > max)
 150                                 invarg("\"ALGOKEY\" makes buffer overflow\n", key);
 151
 152                         strncpy(alg->alg_key, key, len);
 153                 }
 154         }
 155
 156         alg->alg_key_len = len * 8;
 157
 158         return 0;
 159 }
 160
 161 static int xfrm_state_flag_parse(__u8 *flags, int *argcp, char ***argvp)
 162 {
 163         int argc = *argcp;
 164         char **argv = *argvp;
 165         int len = strlen(*argv);
 166
 167         if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
 168                 __u8 val = 0;
 169
 170                 if (get_u8(&val, *argv, 16))
 171                         invarg("\"FLAG\" is invalid", *argv);
 172                 *flags = val;
 173         } else {
 174                 if (strcmp(*argv, "noecn") == 0)
 175                         *flags |= XFRM_STATE_NOECN;
 176                 else
 177                         invarg("\"FLAG\" is invalid", *argv);
 178         }
 179
 180         filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
 181
 182         *argcp = argc;
 183         *argvp = argv;
 184
 185         return 0;
 186 }
 187
 188 static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
 189 {
 190         struct rtnl_handle rth;
 191         struct {
 192                 struct nlmsghdr         n;
 193                 struct xfrm_usersa_info xsinfo;
 194                 char                    buf[RTA_BUF_SIZE];
 195         } req;
 196         char *idp = NULL;
 197         char *ealgop = NULL;
 198         char *aalgop = NULL;
 199         char *calgop = NULL;
 200
 201         memset(&req, 0, sizeof(req));
 202
 203         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
 204         req.n.nlmsg_flags = NLM_F_REQUEST|flags;
 205         req.n.nlmsg_type = cmd;
 206         req.xsinfo.family = preferred_family;
 207
 208         req.xsinfo.lft.soft_byte_limit = XFRM_INF;
 209         req.xsinfo.lft.hard_byte_limit = XFRM_INF;
 210         req.xsinfo.lft.soft_packet_limit = XFRM_INF;
 211         req.xsinfo.lft.hard_packet_limit = XFRM_INF;
 212
 213         while (argc > 0) {
 214                 if (strcmp(*argv, "mode") == 0) {
 215                         NEXT_ARG();
 216                         xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
 217                 } else if (strcmp(*argv, "reqid") == 0) {
 218                         NEXT_ARG();
 219                         xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv);
 220                 } else if (strcmp(*argv, "flag") == 0) {
 221                         NEXT_ARG();
 222                         xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv);
 223                 } else if (strcmp(*argv, "sel") == 0) {
 224                         NEXT_ARG();
 225                         xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv);
 226                 } else if (strcmp(*argv, "limit") == 0) {
 227                         NEXT_ARG();
 228                         xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv);
 229                 } else {
 230                         /* try to assume ALGO */
 231                         int type = xfrm_algotype_getbyname(*argv);
 232                         switch (type) {
 233                         case XFRMA_ALG_CRYPT:
 234                         case XFRMA_ALG_AUTH:
 235                         case XFRMA_ALG_COMP:
 236                         {
 237                                 /* ALGO */
 238                                 struct {
 239                                         struct xfrm_algo alg;
 240                                         char buf[XFRM_ALGO_KEY_BUF_SIZE];
 241                                 } alg;
 242                                 int len;
 243                                 char *name;
 244                                 char *key;
 245
 246                                 switch (type) {
 247                                 case XFRMA_ALG_CRYPT:
 248                                         if (ealgop)
 249                                                 duparg("ALGOTYPE", *argv);
 250                                         ealgop = *argv;
 251                                         break;
 252                                 case XFRMA_ALG_AUTH:
 253                                         if (aalgop)
 254                                                 duparg("ALGOTYPE", *argv);
 255                                         aalgop = *argv;
 256                                         break;
 257                                 case XFRMA_ALG_COMP:
 258                                         if (calgop)
 259                                                 duparg("ALGOTYPE", *argv);
 260                                         calgop = *argv;
 261                                         break;
 262                                 default:
 263                                         /* not reached */
 264                                         invarg("\"ALGOTYPE\" is invalid\n", *argv);
 265                                 }
 266
 267                                 if (!NEXT_ARG_OK())
 268                                         missarg("ALGONAME");
 269                                 NEXT_ARG();
 270                                 name = *argv;
 271
 272                                 if (!NEXT_ARG_OK())
 273                                         missarg("ALGOKEY");
 274                                 NEXT_ARG();
 275                                 key = *argv;
 276
 277                                 memset(&alg, 0, sizeof(alg));
 278
 279                                 xfrm_algo_parse((void *)&alg, type, name, key,
 280                                                 sizeof(alg.buf));
 281                                 len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;
 282
 283                                 addattr_l(&req.n, sizeof(req.buf), type,
 284                                           (void *)&alg, len);
 285                                 break;
 286                         }
 287                         default:
 288                                 /* try to assume ID */
 289                                 if (idp)
 290                                         invarg("unknown", *argv);
 291                                 idp = *argv;
 292
 293                                 /* ID */
 294                                 xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
 295                                               &req.xsinfo.family, 0, &argc, &argv);
 296                                 if (preferred_family == AF_UNSPEC)
 297                                         preferred_family = req.xsinfo.family;
 298                         }
 299                 }
 300                 argc--; argv++;
 301         }
 302
 303         if (!idp) {
 304                 fprintf(stderr, "Not enough information: \"ID\" is required\n");
 305                 exit(1);
 306         }
 307
 308         if (ealgop || aalgop || calgop) {
 309                 if (req.xsinfo.id.proto != IPPROTO_ESP &&
 310                     req.xsinfo.id.proto != IPPROTO_AH &&
 311                     req.xsinfo.id.proto != IPPROTO_COMP) {
 312                         fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n", strxf_proto(req.xsinfo.id.proto));
 313                         exit(1);
 314                 }
 315         } else {
 316                 if (req.xsinfo.id.proto == IPPROTO_ESP ||
 317                     req.xsinfo.id.proto == IPPROTO_AH ||
 318                     req.xsinfo.id.proto == IPPROTO_COMP) {
 319                         fprintf(stderr, "\"ALGO\" is required with proto=%s\n", strxf_proto(req.xsinfo.id.proto));
 320                         exit (1);
 321                 }
 322         }
 323
 324         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 325                 exit(1);
 326
 327         if (req.xsinfo.family == AF_UNSPEC)
 328                 req.xsinfo.family = AF_INET;
 329
 330         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 331                 exit(2);
 332
 333         rtnl_close(&rth);
 334
 335         return 0;
 336 }
 337
 338 static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo)
 339 {
 340         if (!filter.use)
 341                 return 1;
 342
 343         if (filter.id_src_mask)
 344                 if (memcmp(&xsinfo->saddr, &filter.xsinfo.saddr,
 345                            filter.id_src_mask) != 0)
 346                         return 0;
 347         if (filter.id_dst_mask)
 348                 if (memcmp(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
 349                            filter.id_dst_mask) != 0)
 350                         return 0;
 351         if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask)
 352                 return 0;
 353         if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask)
 354                 return 0;
 355         if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask)
 356                 return 0;
 357         if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask)
 358                 return 0;
 359         if (filter.state_flags_mask)
 360                 if ((xsinfo->flags & filter.xsinfo.flags) == 0)
 361                         return 0;
 362
 363         return 1;
 364 }
 365
 366 static int xfrm_selector_iszero(struct xfrm_selector *s)
 367 {
 368         struct xfrm_selector s0;
 369
 370         memset(&s0, 0, sizeof(s0));
 371
 372         return (memcmp(&s0, s, sizeof(s0)) == 0);
 373 }
 374
 375 static int xfrm_state_print(const struct sockaddr_nl *who,
 376                             const struct nlmsghdr *n,
 377                             void *arg)
 378 {
 379         FILE *fp = (FILE*)arg;
 380         struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
 381         int len = n->nlmsg_len;
 382         struct rtattr * tb[XFRMA_MAX+1];
 383         int ntb;
 384
 385         if (n->nlmsg_type != XFRM_MSG_NEWSA &&
 386             n->nlmsg_type != XFRM_MSG_DELSA) {
 387                 fprintf(stderr, "Not a state: %08x %08x %08x\n",
 388                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 389                 return 0;
 390         }
 391
 392         len -= NLMSG_LENGTH(sizeof(*xsinfo));
 393         if (len < 0) {
 394                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 395                 return -1;
 396         }
 397
 398         if (!xfrm_state_filter_match(xsinfo))
 399                 return 0;
 400
 401         memset(tb, 0, sizeof(tb));
 402         ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMS_RTA(xsinfo), len);
 403
 404         if (n->nlmsg_type == XFRM_MSG_DELSA)
 405                 fprintf(fp, "Deleted ");
 406
 407         xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
 408                            xsinfo->reqid, xsinfo->family, fp, NULL);
 409
 410         fprintf(fp, "\t");
 411         fprintf(fp, "replay-window %d ", xsinfo->replay_window);
 412         if (show_stats > 0)
 413                 fprintf(fp, "seq 0x%08u ", xsinfo->seq);
 414         if (xsinfo->flags) {
 415                 fprintf(fp, "flag 0x%s", strxf_flags(xsinfo->flags));
 416                 if (show_stats > 0) {
 417                         if (xsinfo->flags) {
 418                                 fprintf(fp, "(");
 419                                 if (xsinfo->flags & XFRM_STATE_NOECN)
 420                                         fprintf(fp, "noecn");
 421                                 fprintf(fp, ")");
 422                         }
 423                 }
 424         }
 425         fprintf(fp, "%s", _SL_);
 426
 427         xfrm_xfrma_print(tb, ntb, xsinfo->family, fp, "\t");
 428
 429         if (!xfrm_selector_iszero(&xsinfo->sel))
 430                 xfrm_selector_print(&xsinfo->sel, xsinfo->family, fp, "\tsel ");
 431
 432         if (show_stats > 0) {
 433                 xfrm_lifetime_print(&xsinfo->lft, &xsinfo->curlft, fp, "\t");
 434                 xfrm_stats_print(&xsinfo->stats, fp, "\t");
 435         }
 436
 437         if (oneline)
 438                 fprintf(fp, "\n");
 439
 440         return 0;
 441 }
 442
 443 static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
 444 {
 445         struct rtnl_handle rth;
 446         struct {
 447                 struct nlmsghdr         n;
 448                 struct xfrm_usersa_id   xsid;
 449         } req;
 450         struct xfrm_id id;
 451         char *idp = NULL;
 452
 453         memset(&req, 0, sizeof(req));
 454
 455         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
 456         req.n.nlmsg_flags = NLM_F_REQUEST;
 457         req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
 458         req.xsid.family = preferred_family;
 459
 460         while (argc > 0) {
 461                 /*
 462                  * XXX: Source address is not used and ignore it to follow
 463                  * XXX: a manner of setkey e.g. in the case of deleting/getting
 464                  * XXX: message of IPsec SA.
 465                  */
 466                 xfrm_address_t ignore_saddr;
 467
 468                 if (idp)
 469                         invarg("unknown", *argv);
 470                 idp = *argv;
 471
 472                 /* ID */
 473                 memset(&id, 0, sizeof(id));
 474                 xfrm_id_parse(&ignore_saddr, &id, &req.xsid.family, 0,
 475                               &argc, &argv);
 476
 477                 memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
 478                 req.xsid.spi = id.spi;
 479                 req.xsid.proto = id.proto;
 480
 481                 argc--; argv++;
 482         }
 483
 484         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 485                 exit(1);
 486
 487         if (req.xsid.family == AF_UNSPEC)
 488                 req.xsid.family = AF_INET;
 489
 490         if (delete) {
 491                 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 492                         exit(2);
 493         } else {
 494                 char buf[NLMSG_BUF_SIZE];
 495                 struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
 496
 497                 memset(buf, 0, sizeof(buf));
 498
 499                 if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
 500                         exit(2);
 501
 502                 if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
 503                         fprintf(stderr, "An error :-)\n");
 504                         exit(1);
 505                 }
 506         }
 507
 508         rtnl_close(&rth);
 509
 510         return 0;
 511 }
 512
 513 /*
 514  * With an existing state of nlmsg, make new nlmsg for deleting the state
 515  * and store it to buffer.
 516  */
 517 static int xfrm_state_keep(const struct sockaddr_nl *who,
 518                            const struct nlmsghdr *n,
 519                            void *arg)
 520 {
 521         struct xfrm_buffer *xb = (struct xfrm_buffer *)arg;
 522         struct rtnl_handle *rth = xb->rth;
 523         struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
 524         int len = n->nlmsg_len;
 525         struct nlmsghdr *new_n;
 526         struct xfrm_usersa_id *xsid;
 527
 528         if (n->nlmsg_type != XFRM_MSG_NEWSA) {
 529                 fprintf(stderr, "Not a state: %08x %08x %08x\n",
 530                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 531                 return 0;
 532         }
 533
 534         len -= NLMSG_LENGTH(sizeof(*xsinfo));
 535         if (len < 0) {
 536                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 537                 return -1;
 538         }
 539
 540         if (!xfrm_state_filter_match(xsinfo))
 541                 return 0;
 542
 543         if (xb->offset > xb->size) {
 544                 fprintf(stderr, "Flush buffer overflow\n");
 545                 return -1;
 546         }
 547
 548         new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
 549         new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid));
 550         new_n->nlmsg_flags = NLM_F_REQUEST;
 551         new_n->nlmsg_type = XFRM_MSG_DELSA;
 552         new_n->nlmsg_seq = ++rth->seq;
 553
 554         xsid = NLMSG_DATA(new_n);
 555         xsid->family = xsinfo->family;
 556         memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr));
 557         xsid->spi = xsinfo->id.spi;
 558         xsid->proto = xsinfo->id.proto;
 559
 560         xb->offset += new_n->nlmsg_len;
 561         xb->nlmsg_count ++;
 562
 563         return 0;
 564 }
 565
 566 static int xfrm_state_list_or_flush(int argc, char **argv, int flush)
 567 {
 568         char *idp = NULL;
 569         struct rtnl_handle rth;
 570
 571         filter.use = 1;
 572         filter.xsinfo.family = preferred_family;
 573
 574         while (argc > 0) {
 575                 if (strcmp(*argv, "mode") == 0) {
 576                         NEXT_ARG();
 577                         xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv);
 578
 579                         filter.mode_mask = XFRM_FILTER_MASK_FULL;
 580
 581                 } else if (strcmp(*argv, "reqid") == 0) {
 582                         NEXT_ARG();
 583                         xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv);
 584
 585                         filter.reqid_mask = XFRM_FILTER_MASK_FULL;
 586
 587                 } else if (strcmp(*argv, "flag") == 0) {
 588                         NEXT_ARG();
 589                         xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv);
 590
 591                         filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
 592
 593                 } else {
 594                         if (idp)
 595                                 invarg("unknown", *argv);
 596                         idp = *argv;
 597
 598                         /* ID */
 599                         xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id,
 600                                       &filter.xsinfo.family, 1, &argc, &argv);
 601                         if (preferred_family == AF_UNSPEC)
 602                                 preferred_family = filter.xsinfo.family;
 603                 }
 604                 argc--; argv++;
 605         }
 606
 607         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 608                 exit(1);
 609
 610         if (flush) {
 611                 struct xfrm_buffer xb;
 612                 char buf[NLMSG_FLUSH_BUF_SIZE];
 613                 int i;
 614
 615                 xb.buf = buf;
 616                 xb.size = sizeof(buf);
 617                 xb.rth = &rth;
 618
 619                 for (i = 0; ; i++) {
 620                         xb.offset = 0;
 621                         xb.nlmsg_count = 0;
 622
 623                         if (show_stats > 1)
 624                                 fprintf(stderr, "Flush round = %d\n", i);
 625
 626                         if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 627                                 perror("Cannot send dump request");
 628                                 exit(1);
 629                         }
 630
 631                         if (rtnl_dump_filter(&rth, xfrm_state_keep, &xb, NULL, NULL) < 0) {
 632                                 fprintf(stderr, "Flush terminated\n");
 633                                 exit(1);
 634                         }
 635                         if (xb.nlmsg_count == 0) {
 636                                 if (show_stats > 1)
 637                                         fprintf(stderr, "Flush completed\n");
 638                                 break;
 639                         }
 640
 641                         if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
 642                                 perror("Failed to send flush request\n");
 643                                 exit(1);
 644                         }
 645                         if (show_stats > 1)
 646                                 fprintf(stderr, "Flushed nlmsg count = %d\n", xb.nlmsg_count);
 647
 648                         xb.offset = 0;
 649                         xb.nlmsg_count = 0;
 650                 }
 651
 652         } else {
 653                 if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 654                         perror("Cannot send dump request");
 655                         exit(1);
 656                 }
 657
 658                 if (rtnl_dump_filter(&rth, xfrm_state_print, stdout, NULL, NULL) < 0) {
 659                         fprintf(stderr, "Dump terminated\n");
 660                         exit(1);
 661                 }
 662         }
 663
 664         rtnl_close(&rth);
 665
 666         exit(0);
 667 }
 668
 669 int do_xfrm_state(int argc, char **argv)
 670 {
 671         if (argc < 1)
 672                 return xfrm_state_list_or_flush(0, NULL, 0);
 673
 674         if (matches(*argv, "add") == 0)
 675                 return xfrm_state_modify(XFRM_MSG_NEWSA, 0,
 676                                          argc-1, argv+1);
 677         if (matches(*argv, "update") == 0)
 678                 return xfrm_state_modify(XFRM_MSG_UPDSA, 0,
 679                                          argc-1, argv+1);
 680         if (matches(*argv, "delete") == 0 || matches(*argv, "del") == 0)
 681                 return xfrm_state_get_or_delete(argc-1, argv+1, 1);
 682         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
 683             || matches(*argv, "lst") == 0)
 684                 return xfrm_state_list_or_flush(argc-1, argv+1, 0);
 685         if (matches(*argv, "get") == 0)
 686                 return xfrm_state_get_or_delete(argc-1, argv+1, 0);
 687         if (matches(*argv, "flush") == 0)
 688                 return xfrm_state_list_or_flush(argc-1, argv+1, 1);
 689         if (matches(*argv, "help") == 0)
 690                 usage();
 691         fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
 692         exit(-1);
 693 }