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+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
  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 ] [ replay-window SIZE ] [ flag FLAG-LIST ]\n");
  60         fprintf(stderr, "        [ encap ENCAP ] [ sel SELECTOR ] [ LIMIT-LIST ]\n");
  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 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 | comp ]\n");
  67         fprintf(stderr, "XFRM_PROTO := [ ");
  68         fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ESP));
  69         fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_AH));
  70         fprintf(stderr, "%s ", strxf_xfrmproto(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\n");
  79         fprintf(stderr, "FLAG := [ noecn | decap-dscp ]\n");
  80
  81         fprintf(stderr, "ENCAP := ENCAP-TYPE SPORT DPORT OADDR\n");
  82         fprintf(stderr, "ENCAP-TYPE := espinudp | espinudp-nonike\n");
  83
  84         fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ ALGO ]\n");
  85         fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
  86         fprintf(stderr, "ALGO_TYPE := [ ");
  87         fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT));
  88         fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH));
  89         fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP));
  90         fprintf(stderr, "]\n");
  91
  92         //fprintf(stderr, "ALGO_NAME - algorithm name\n");
  93         //fprintf(stderr, "ALGO_KEY - algorithm key\n");
  94
  95         fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ UPSPEC ] [ dev DEV ]\n");
  96
  97         fprintf(stderr, "UPSPEC := proto PROTO [ [ sport PORT ] [ dport PORT ] |\n");
  98         fprintf(stderr, "                        [ type NUMBER ] [ code NUMBER ] ]\n");
  99
 100
 101         //fprintf(stderr, "DEV - device name(default=none)\n");
 102         fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] | [ limit LIMIT ]\n");
 103         fprintf(stderr, "LIMIT := [ [time-soft|time-hard|time-use-soft|time-use-hard] SECONDS ] |\n");
 104         fprintf(stderr, "         [ [byte-soft|byte-hard] SIZE ] | [ [packet-soft|packet-hard] COUNT ]\n");
 105         exit(-1);
 106 }
 107
 108 static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
 109                            char *name, char *key, int max)
 110 {
 111         int len;
 112         int slen = strlen(key);
 113
 114 #if 0
 115         /* XXX: verifying both name and key is required! */
 116         fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n");
 117 #endif
 118
 119         strncpy(alg->alg_name, name, sizeof(alg->alg_name));
 120
 121         if (slen > 2 && strncmp(key, "0x", 2) == 0) {
 122                 /* split two chars "0x" from the top */
 123                 char *p = key + 2;
 124                 int plen = slen - 2;
 125                 int i;
 126                 int j;
 127
 128                 /* Converting hexadecimal numbered string into real key;
 129                  * Convert each two chars into one char(value). If number
 130                  * of the length is odd, add zero on the top for rounding.
 131                  */
 132
 133                 /* calculate length of the converted values(real key) */
 134                 len = (plen + 1) / 2;
 135                 if (len > max)
 136                         invarg("\"ALGOKEY\" makes buffer overflow\n", key);
 137
 138                 for (i = - (plen % 2), j = 0; j < len; i += 2, j++) {
 139                         char vbuf[3];
 140                         char val;
 141
 142                         vbuf[0] = i >= 0 ? p[i] : '0';
 143                         vbuf[1] = p[i + 1];
 144                         vbuf[2] = '\0';
 145
 146                         if (get_u8(&val, vbuf, 16))
 147                                 invarg("\"ALGOKEY\" is invalid", key);
 148
 149                         alg->alg_key[j] = val;
 150                 }
 151         } else {
 152                 len = slen;
 153                 if (len > 0) {
 154                         if (len > max)
 155                                 invarg("\"ALGOKEY\" makes buffer overflow\n", key);
 156
 157                         strncpy(alg->alg_key, key, len);
 158                 }
 159         }
 160
 161         alg->alg_key_len = len * 8;
 162
 163         return 0;
 164 }
 165
 166 static int xfrm_state_flag_parse(__u8 *flags, int *argcp, char ***argvp)
 167 {
 168         int argc = *argcp;
 169         char **argv = *argvp;
 170         int len = strlen(*argv);
 171
 172         if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
 173                 __u8 val = 0;
 174
 175                 if (get_u8(&val, *argv, 16))
 176                         invarg("\"FLAG\" is invalid", *argv);
 177                 *flags = val;
 178         } else {
 179                 while (1) {
 180                         if (strcmp(*argv, "noecn") == 0)
 181                                 *flags |= XFRM_STATE_NOECN;
 182                         else if (strcmp(*argv, "decap-dscp") == 0)
 183                                 *flags |= XFRM_STATE_DECAP_DSCP;
 184                         else {
 185                                 PREV_ARG(); /* back track */
 186                                 break;
 187                         }
 188
 189                         if (!NEXT_ARG_OK())
 190                                 break;
 191                         NEXT_ARG();
 192                 }
 193         }
 194
 195         filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
 196
 197         *argcp = argc;
 198         *argvp = argv;
 199
 200         return 0;
 201 }
 202
 203 static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
 204 {
 205         struct rtnl_handle rth;
 206         struct {
 207                 struct nlmsghdr         n;
 208                 struct xfrm_usersa_info xsinfo;
 209                 char                    buf[RTA_BUF_SIZE];
 210         } req;
 211         char *idp = NULL;
 212         char *ealgop = NULL;
 213         char *aalgop = NULL;
 214         char *calgop = NULL;
 215
 216         memset(&req, 0, sizeof(req));
 217
 218         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
 219         req.n.nlmsg_flags = NLM_F_REQUEST|flags;
 220         req.n.nlmsg_type = cmd;
 221         req.xsinfo.family = preferred_family;
 222
 223         req.xsinfo.lft.soft_byte_limit = XFRM_INF;
 224         req.xsinfo.lft.hard_byte_limit = XFRM_INF;
 225         req.xsinfo.lft.soft_packet_limit = XFRM_INF;
 226         req.xsinfo.lft.hard_packet_limit = XFRM_INF;
 227
 228         while (argc > 0) {
 229                 if (strcmp(*argv, "mode") == 0) {
 230                         NEXT_ARG();
 231                         xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
 232                 } else if (strcmp(*argv, "reqid") == 0) {
 233                         NEXT_ARG();
 234                         xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv);
 235                 } else if (strcmp(*argv, "replay-window") == 0) {
 236                         NEXT_ARG();
 237                         if (get_u8(&req.xsinfo.replay_window, *argv, 0))
 238                                 invarg("\"replay-window\" value is invalid", *argv);
 239                 } else if (strcmp(*argv, "flag") == 0) {
 240                         NEXT_ARG();
 241                         xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv);
 242                 } else if (strcmp(*argv, "sel") == 0) {
 243                         NEXT_ARG();
 244                         xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv);
 245                 } else if (strcmp(*argv, "limit") == 0) {
 246                         NEXT_ARG();
 247                         xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv);
 248                 } else if (strcmp(*argv, "encap") == 0) {
 249                         struct xfrm_encap_tmpl encap;
 250                         inet_prefix oa;
 251                         NEXT_ARG();
 252                         xfrm_encap_type_parse(&encap.encap_type, &argc, &argv);
 253                         NEXT_ARG();
 254                         if (get_u16(&encap.encap_sport, *argv, 0))
 255                                 invarg("\"encap\" sport value is invalid", *argv);
 256                         encap.encap_sport = htons(encap.encap_sport);
 257                         NEXT_ARG();
 258                         if (get_u16(&encap.encap_dport, *argv, 0))
 259                                 invarg("\"encap\" dport value is invalid", *argv);
 260                         encap.encap_dport = htons(encap.encap_dport);
 261                         NEXT_ARG();
 262                         get_addr(&oa, *argv, AF_UNSPEC);
 263                         memcpy(&encap.encap_oa, &oa.data, sizeof(encap.encap_oa));
 264                         addattr_l(&req.n, sizeof(req.buf), XFRMA_ENCAP,
 265                                   (void *)&encap, sizeof(encap));
 266                 } else {
 267                         /* try to assume ALGO */
 268                         int type = xfrm_algotype_getbyname(*argv);
 269                         switch (type) {
 270                         case XFRMA_ALG_CRYPT:
 271                         case XFRMA_ALG_AUTH:
 272                         case XFRMA_ALG_COMP:
 273                         {
 274                                 /* ALGO */
 275                                 struct {
 276                                         struct xfrm_algo alg;
 277                                         char buf[XFRM_ALGO_KEY_BUF_SIZE];
 278                                 } alg;
 279                                 int len;
 280                                 char *name;
 281                                 char *key;
 282
 283                                 switch (type) {
 284                                 case XFRMA_ALG_CRYPT:
 285                                         if (ealgop)
 286                                                 duparg("ALGOTYPE", *argv);
 287                                         ealgop = *argv;
 288                                         break;
 289                                 case XFRMA_ALG_AUTH:
 290                                         if (aalgop)
 291                                                 duparg("ALGOTYPE", *argv);
 292                                         aalgop = *argv;
 293                                         break;
 294                                 case XFRMA_ALG_COMP:
 295                                         if (calgop)
 296                                                 duparg("ALGOTYPE", *argv);
 297                                         calgop = *argv;
 298                                         break;
 299                                 default:
 300                                         /* not reached */
 301                                         invarg("\"ALGOTYPE\" is invalid\n", *argv);
 302                                 }
 303
 304                                 if (!NEXT_ARG_OK())
 305                                         missarg("ALGONAME");
 306                                 NEXT_ARG();
 307                                 name = *argv;
 308
 309                                 if (!NEXT_ARG_OK())
 310                                         missarg("ALGOKEY");
 311                                 NEXT_ARG();
 312                                 key = *argv;
 313
 314                                 memset(&alg, 0, sizeof(alg));
 315
 316                                 xfrm_algo_parse((void *)&alg, type, name, key,
 317                                                 sizeof(alg.buf));
 318                                 len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;
 319
 320                                 addattr_l(&req.n, sizeof(req.buf), type,
 321                                           (void *)&alg, len);
 322                                 break;
 323                         }
 324                         default:
 325                                 /* try to assume ID */
 326                                 if (idp)
 327                                         invarg("unknown", *argv);
 328                                 idp = *argv;
 329
 330                                 /* ID */
 331                                 xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
 332                                               &req.xsinfo.family, 0, &argc, &argv);
 333                                 if (preferred_family == AF_UNSPEC)
 334                                         preferred_family = req.xsinfo.family;
 335                         }
 336                 }
 337                 argc--; argv++;
 338         }
 339
 340         if (!idp) {
 341                 fprintf(stderr, "Not enough information: \"ID\" is required\n");
 342                 exit(1);
 343         }
 344
 345         if (ealgop || aalgop || calgop) {
 346                 if (req.xsinfo.id.proto != IPPROTO_ESP &&
 347                     req.xsinfo.id.proto != IPPROTO_AH &&
 348                     req.xsinfo.id.proto != IPPROTO_COMP) {
 349                         fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n", strxf_xfrmproto(req.xsinfo.id.proto));
 350                         exit(1);
 351                 }
 352         } else {
 353                 if (req.xsinfo.id.proto == IPPROTO_ESP ||
 354                     req.xsinfo.id.proto == IPPROTO_AH ||
 355                     req.xsinfo.id.proto == IPPROTO_COMP) {
 356                         fprintf(stderr, "\"ALGO\" is required with proto=%s\n", strxf_xfrmproto(req.xsinfo.id.proto));
 357                         exit (1);
 358                 }
 359         }
 360
 361         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 362                 exit(1);
 363
 364         if (req.xsinfo.family == AF_UNSPEC)
 365                 req.xsinfo.family = AF_INET;
 366
 367         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 368                 exit(2);
 369
 370         rtnl_close(&rth);
 371
 372         return 0;
 373 }
 374
 375 static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo)
 376 {
 377         if (!filter.use)
 378                 return 1;
 379
 380         if (filter.id_src_mask)
 381                 if (xfrm_addr_match(&xsinfo->saddr, &filter.xsinfo.saddr,
 382                                     filter.id_src_mask))
 383                         return 0;
 384         if (filter.id_dst_mask)
 385                 if (xfrm_addr_match(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
 386                                     filter.id_dst_mask))
 387                         return 0;
 388         if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask)
 389                 return 0;
 390         if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask)
 391                 return 0;
 392         if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask)
 393                 return 0;
 394         if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask)
 395                 return 0;
 396         if (filter.state_flags_mask)
 397                 if ((xsinfo->flags & filter.xsinfo.flags) == 0)
 398                         return 0;
 399
 400         return 1;
 401 }
 402
 403 static int xfrm_selector_iszero(struct xfrm_selector *s)
 404 {
 405         struct xfrm_selector s0;
 406
 407         memset(&s0, 0, sizeof(s0));
 408
 409         return (memcmp(&s0, s, sizeof(s0)) == 0);
 410 }
 411
 412 static int xfrm_state_print(const struct sockaddr_nl *who,
 413                             struct nlmsghdr *n,
 414                             void *arg)
 415 {
 416         FILE *fp = (FILE*)arg;
 417         struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
 418         int len = n->nlmsg_len;
 419         struct rtattr * tb[XFRMA_MAX+1];
 420
 421         if (n->nlmsg_type != XFRM_MSG_NEWSA &&
 422             n->nlmsg_type != XFRM_MSG_DELSA) {
 423                 fprintf(stderr, "Not a state: %08x %08x %08x\n",
 424                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 425                 return 0;
 426         }
 427
 428         len -= NLMSG_LENGTH(sizeof(*xsinfo));
 429         if (len < 0) {
 430                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 431                 return -1;
 432         }
 433
 434         if (!xfrm_state_filter_match(xsinfo))
 435                 return 0;
 436
 437         parse_rtattr(tb, XFRMA_MAX, XFRMS_RTA(xsinfo), len);
 438
 439         if (n->nlmsg_type == XFRM_MSG_DELSA)
 440                 fprintf(fp, "Deleted ");
 441
 442         xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
 443                            xsinfo->reqid, xsinfo->family, 1, fp, NULL);
 444
 445         fprintf(fp, "\t");
 446         fprintf(fp, "replay-window %u ", xsinfo->replay_window);
 447         if (show_stats > 0)
 448                 fprintf(fp, "seq 0x%08u ", xsinfo->seq);
 449         if (show_stats > 0 || xsinfo->flags) {
 450                 __u8 flags = xsinfo->flags;
 451
 452                 fprintf(fp, "flag ");
 453                 XFRM_FLAG_PRINT(fp, flags, XFRM_STATE_NOECN, "noecn");
 454                 XFRM_FLAG_PRINT(fp, flags, XFRM_STATE_DECAP_DSCP, "decap-dscp");
 455                 if (flags)
 456                         fprintf(fp, "%x", flags);
 457                 if (show_stats > 0)
 458                         fprintf(fp, " (0x%s)", strxf_mask8(flags));
 459         }
 460         fprintf(fp, "%s", _SL_);
 461
 462         xfrm_xfrma_print(tb, xsinfo->family, fp, "\t");
 463
 464         if (!xfrm_selector_iszero(&xsinfo->sel))
 465                 xfrm_selector_print(&xsinfo->sel, xsinfo->family, fp, "\tsel ");
 466
 467         if (show_stats > 0) {
 468                 xfrm_lifetime_print(&xsinfo->lft, &xsinfo->curlft, fp, "\t");
 469                 xfrm_stats_print(&xsinfo->stats, fp, "\t");
 470         }
 471
 472         if (oneline)
 473                 fprintf(fp, "\n");
 474
 475         return 0;
 476 }
 477
 478 static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
 479 {
 480         struct rtnl_handle rth;
 481         struct {
 482                 struct nlmsghdr         n;
 483                 struct xfrm_usersa_id   xsid;
 484         } req;
 485         struct xfrm_id id;
 486         char *idp = NULL;
 487
 488         memset(&req, 0, sizeof(req));
 489
 490         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
 491         req.n.nlmsg_flags = NLM_F_REQUEST;
 492         req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
 493         req.xsid.family = preferred_family;
 494
 495         while (argc > 0) {
 496                 /*
 497                  * XXX: Source address is not used and ignore it to follow
 498                  * XXX: a manner of setkey e.g. in the case of deleting/getting
 499                  * XXX: message of IPsec SA.
 500                  */
 501                 xfrm_address_t ignore_saddr;
 502
 503                 if (idp)
 504                         invarg("unknown", *argv);
 505                 idp = *argv;
 506
 507                 /* ID */
 508                 memset(&id, 0, sizeof(id));
 509                 xfrm_id_parse(&ignore_saddr, &id, &req.xsid.family, 0,
 510                               &argc, &argv);
 511
 512                 memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
 513                 req.xsid.spi = id.spi;
 514                 req.xsid.proto = id.proto;
 515
 516                 argc--; argv++;
 517         }
 518
 519         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 520                 exit(1);
 521
 522         if (req.xsid.family == AF_UNSPEC)
 523                 req.xsid.family = AF_INET;
 524
 525         if (delete) {
 526                 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 527                         exit(2);
 528         } else {
 529                 char buf[NLMSG_BUF_SIZE];
 530                 struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
 531
 532                 memset(buf, 0, sizeof(buf));
 533
 534                 if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
 535                         exit(2);
 536
 537                 if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
 538                         fprintf(stderr, "An error :-)\n");
 539                         exit(1);
 540                 }
 541         }
 542
 543         rtnl_close(&rth);
 544
 545         return 0;
 546 }
 547
 548 /*
 549  * With an existing state of nlmsg, make new nlmsg for deleting the state
 550  * and store it to buffer.
 551  */
 552 static int xfrm_state_keep(const struct sockaddr_nl *who,
 553                            struct nlmsghdr *n,
 554                            void *arg)
 555 {
 556         struct xfrm_buffer *xb = (struct xfrm_buffer *)arg;
 557         struct rtnl_handle *rth = xb->rth;
 558         struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
 559         int len = n->nlmsg_len;
 560         struct nlmsghdr *new_n;
 561         struct xfrm_usersa_id *xsid;
 562
 563         if (n->nlmsg_type != XFRM_MSG_NEWSA) {
 564                 fprintf(stderr, "Not a state: %08x %08x %08x\n",
 565                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 566                 return 0;
 567         }
 568
 569         len -= NLMSG_LENGTH(sizeof(*xsinfo));
 570         if (len < 0) {
 571                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 572                 return -1;
 573         }
 574
 575         if (!xfrm_state_filter_match(xsinfo))
 576                 return 0;
 577
 578         if (xb->offset > xb->size) {
 579                 fprintf(stderr, "Flush buffer overflow\n");
 580                 return -1;
 581         }
 582
 583         new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
 584         new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid));
 585         new_n->nlmsg_flags = NLM_F_REQUEST;
 586         new_n->nlmsg_type = XFRM_MSG_DELSA;
 587         new_n->nlmsg_seq = ++rth->seq;
 588
 589         xsid = NLMSG_DATA(new_n);
 590         xsid->family = xsinfo->family;
 591         memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr));
 592         xsid->spi = xsinfo->id.spi;
 593         xsid->proto = xsinfo->id.proto;
 594
 595         xb->offset += new_n->nlmsg_len;
 596         xb->nlmsg_count ++;
 597
 598         return 0;
 599 }
 600
 601 static int xfrm_state_list_or_flush(int argc, char **argv, int flush)
 602 {
 603         char *idp = NULL;
 604         struct rtnl_handle rth;
 605
 606         if(argc > 0)
 607                 filter.use = 1;
 608         filter.xsinfo.family = preferred_family;
 609
 610         while (argc > 0) {
 611                 if (strcmp(*argv, "mode") == 0) {
 612                         NEXT_ARG();
 613                         xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv);
 614
 615                         filter.mode_mask = XFRM_FILTER_MASK_FULL;
 616
 617                 } else if (strcmp(*argv, "reqid") == 0) {
 618                         NEXT_ARG();
 619                         xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv);
 620
 621                         filter.reqid_mask = XFRM_FILTER_MASK_FULL;
 622
 623                 } else if (strcmp(*argv, "flag") == 0) {
 624                         NEXT_ARG();
 625                         xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv);
 626
 627                         filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
 628
 629                 } else {
 630                         if (idp)
 631                                 invarg("unknown", *argv);
 632                         idp = *argv;
 633
 634                         /* ID */
 635                         xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id,
 636                                       &filter.xsinfo.family, 1, &argc, &argv);
 637                         if (preferred_family == AF_UNSPEC)
 638                                 preferred_family = filter.xsinfo.family;
 639                 }
 640                 argc--; argv++;
 641         }
 642
 643         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 644                 exit(1);
 645
 646         if (flush) {
 647                 struct xfrm_buffer xb;
 648                 char buf[NLMSG_FLUSH_BUF_SIZE];
 649                 int i;
 650
 651                 xb.buf = buf;
 652                 xb.size = sizeof(buf);
 653                 xb.rth = &rth;
 654
 655                 for (i = 0; ; i++) {
 656                         xb.offset = 0;
 657                         xb.nlmsg_count = 0;
 658
 659                         if (show_stats > 1)
 660                                 fprintf(stderr, "Flush round = %d\n", i);
 661
 662                         if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 663                                 perror("Cannot send dump request");
 664                                 exit(1);
 665                         }
 666
 667                         if (rtnl_dump_filter(&rth, xfrm_state_keep, &xb, NULL, NULL) < 0) {
 668                                 fprintf(stderr, "Flush terminated\n");
 669                                 exit(1);
 670                         }
 671                         if (xb.nlmsg_count == 0) {
 672                                 if (show_stats > 1)
 673                                         fprintf(stderr, "Flush completed\n");
 674                                 break;
 675                         }
 676
 677                         if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
 678                                 perror("Failed to send flush request\n");
 679                                 exit(1);
 680                         }
 681                         if (show_stats > 1)
 682                                 fprintf(stderr, "Flushed nlmsg count = %d\n", xb.nlmsg_count);
 683
 684                         xb.offset = 0;
 685                         xb.nlmsg_count = 0;
 686                 }
 687
 688         } else {
 689                 if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 690                         perror("Cannot send dump request");
 691                         exit(1);
 692                 }
 693
 694                 if (rtnl_dump_filter(&rth, xfrm_state_print, stdout, NULL, NULL) < 0) {
 695                         fprintf(stderr, "Dump terminated\n");
 696                         exit(1);
 697                 }
 698         }
 699
 700         rtnl_close(&rth);
 701
 702         exit(0);
 703 }
 704
 705 static int xfrm_state_flush_all(void)
 706 {
 707         struct rtnl_handle rth;
 708         struct {
 709                 struct nlmsghdr                 n;
 710                 struct xfrm_usersa_flush        xsf;
 711         } req;
 712
 713         memset(&req, 0, sizeof(req));
 714
 715         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf));
 716         req.n.nlmsg_flags = NLM_F_REQUEST;
 717         req.n.nlmsg_type = XFRM_MSG_FLUSHSA;
 718         req.xsf.proto = IPSEC_PROTO_ANY;
 719
 720         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 721                 exit(1);
 722
 723         if (show_stats > 1)
 724                 fprintf(stderr, "Flush all\n");
 725
 726         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 727                 exit(2);
 728
 729         rtnl_close(&rth);
 730
 731         return 0;
 732 }
 733
 734 int do_xfrm_state(int argc, char **argv)
 735 {
 736         if (argc < 1)
 737                 return xfrm_state_list_or_flush(0, NULL, 0);
 738
 739         if (matches(*argv, "add") == 0)
 740                 return xfrm_state_modify(XFRM_MSG_NEWSA, 0,
 741                                          argc-1, argv+1);
 742         if (matches(*argv, "update") == 0)
 743                 return xfrm_state_modify(XFRM_MSG_UPDSA, 0,
 744                                          argc-1, argv+1);
 745         if (matches(*argv, "delete") == 0 || matches(*argv, "del") == 0)
 746                 return xfrm_state_get_or_delete(argc-1, argv+1, 1);
 747         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
 748             || matches(*argv, "lst") == 0)
 749                 return xfrm_state_list_or_flush(argc-1, argv+1, 0);
 750         if (matches(*argv, "get") == 0)
 751                 return xfrm_state_get_or_delete(argc-1, argv+1, 0);
 752         if (matches(*argv, "flush") == 0) {
 753                 if (argc-1 < 1)
 754                         return xfrm_state_flush_all();
 755                 else
 756                         return xfrm_state_list_or_flush(argc-1, argv+1, 1);
 757         }
 758         if (matches(*argv, "help") == 0)
 759                 usage();
 760         fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
 761         exit(-1);
 762 }