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_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
  54 static void usage(void) __attribute__((noreturn));
  55
  56 static void usage(void)
  57 {
  58         fprintf(stderr, "Usage: ip xfrm state { add | update } ID [ XFRM_OPT ] [ 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         fprintf(stderr, "Usage: ip xfrm state count \n");
  68
  69         fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
  70         //fprintf(stderr, "XFRM_PROTO := [ esp | ah | comp ]\n");
  71         fprintf(stderr, "XFRM_PROTO := [ ");
  72         fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ESP));
  73         fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_AH));
  74         fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_COMP));
  75         fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ROUTING));
  76         fprintf(stderr, "%s ", strxf_xfrmproto(IPPROTO_DSTOPTS));
  77         fprintf(stderr, "]\n");
  78
  79         //fprintf(stderr, "SPI - security parameter index(default=0)\n");
  80
  81         fprintf(stderr, "MODE := [ transport | tunnel | ro | beet ](default=transport)\n");
  82         //fprintf(stderr, "REQID - number(default=0)\n");
  83
  84         fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] FLAG\n");
  85         fprintf(stderr, "FLAG := [ noecn | decap-dscp | wildrecv ]\n");
  86
  87         fprintf(stderr, "ENCAP := ENCAP-TYPE SPORT DPORT OADDR\n");
  88         fprintf(stderr, "ENCAP-TYPE := espinudp | espinudp-nonike\n");
  89
  90         fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ ALGO ]\n");
  91         fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
  92         fprintf(stderr, "ALGO_TYPE := [ ");
  93         fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT));
  94         fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH));
  95         fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP));
  96         fprintf(stderr, "]\n");
  97
  98         //fprintf(stderr, "ALGO_NAME - algorithm name\n");
  99         //fprintf(stderr, "ALGO_KEY - algorithm key\n");
 100
 101         fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ UPSPEC ] [ dev DEV ]\n");
 102
 103         fprintf(stderr, "UPSPEC := proto PROTO [ [ sport PORT ] [ dport PORT ] |\n");
 104         fprintf(stderr, "                        [ type NUMBER ] [ code NUMBER ] ]\n");
 105
 106
 107         //fprintf(stderr, "DEV - device name(default=none)\n");
 108         fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] | [ limit LIMIT ]\n");
 109         fprintf(stderr, "LIMIT := [ [time-soft|time-hard|time-use-soft|time-use-hard] SECONDS ] |\n");
 110         fprintf(stderr, "         [ [byte-soft|byte-hard] SIZE ] | [ [packet-soft|packet-hard] COUNT ]\n");
 111         exit(-1);
 112 }
 113
 114 static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
 115                            char *name, char *key, int max)
 116 {
 117         int len;
 118         int slen = strlen(key);
 119
 120 #if 0
 121         /* XXX: verifying both name and key is required! */
 122         fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n");
 123 #endif
 124
 125         strncpy(alg->alg_name, name, sizeof(alg->alg_name));
 126
 127         if (slen > 2 && strncmp(key, "0x", 2) == 0) {
 128                 /* split two chars "0x" from the top */
 129                 char *p = key + 2;
 130                 int plen = slen - 2;
 131                 int i;
 132                 int j;
 133
 134                 /* Converting hexadecimal numbered string into real key;
 135                  * Convert each two chars into one char(value). If number
 136                  * of the length is odd, add zero on the top for rounding.
 137                  */
 138
 139                 /* calculate length of the converted values(real key) */
 140                 len = (plen + 1) / 2;
 141                 if (len > max)
 142                         invarg("\"ALGOKEY\" makes buffer overflow\n", key);
 143
 144                 for (i = - (plen % 2), j = 0; j < len; i += 2, j++) {
 145                         char vbuf[3];
 146                         __u8 val;
 147
 148                         vbuf[0] = i >= 0 ? p[i] : '0';
 149                         vbuf[1] = p[i + 1];
 150                         vbuf[2] = '\0';
 151
 152                         if (get_u8(&val, vbuf, 16))
 153                                 invarg("\"ALGOKEY\" is invalid", key);
 154
 155                         alg->alg_key[j] = val;
 156                 }
 157         } else {
 158                 len = slen;
 159                 if (len > 0) {
 160                         if (len > max)
 161                                 invarg("\"ALGOKEY\" makes buffer overflow\n", key);
 162
 163                         strncpy(alg->alg_key, key, len);
 164                 }
 165         }
 166
 167         alg->alg_key_len = len * 8;
 168
 169         return 0;
 170 }
 171
 172 static int xfrm_seq_parse(__u32 *seq, int *argcp, char ***argvp)
 173 {
 174         int argc = *argcp;
 175         char **argv = *argvp;
 176
 177         if (get_u32(seq, *argv, 0))
 178                 invarg("\"SEQ\" is invalid", *argv);
 179
 180         *seq = htonl(*seq);
 181
 182         *argcp = argc;
 183         *argvp = argv;
 184
 185         return 0;
 186 }
 187
 188 static int xfrm_state_flag_parse(__u8 *flags, int *argcp, char ***argvp)
 189 {
 190         int argc = *argcp;
 191         char **argv = *argvp;
 192         int len = strlen(*argv);
 193
 194         if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
 195                 __u8 val = 0;
 196
 197                 if (get_u8(&val, *argv, 16))
 198                         invarg("\"FLAG\" is invalid", *argv);
 199                 *flags = val;
 200         } else {
 201                 while (1) {
 202                         if (strcmp(*argv, "noecn") == 0)
 203                                 *flags |= XFRM_STATE_NOECN;
 204                         else if (strcmp(*argv, "decap-dscp") == 0)
 205                                 *flags |= XFRM_STATE_DECAP_DSCP;
 206                         else if (strcmp(*argv, "wildrecv") == 0)
 207                                 *flags |= XFRM_STATE_WILDRECV;
 208                         else {
 209                                 PREV_ARG(); /* back track */
 210                                 break;
 211                         }
 212
 213                         if (!NEXT_ARG_OK())
 214                                 break;
 215                         NEXT_ARG();
 216                 }
 217         }
 218
 219         *argcp = argc;
 220         *argvp = argv;
 221
 222         return 0;
 223 }
 224
 225 static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
 226 {
 227         struct rtnl_handle rth;
 228         struct {
 229                 struct nlmsghdr         n;
 230                 struct xfrm_usersa_info xsinfo;
 231                 char                    buf[RTA_BUF_SIZE];
 232         } req;
 233         char *idp = NULL;
 234         char *ealgop = NULL;
 235         char *aalgop = NULL;
 236         char *calgop = NULL;
 237         char *coap = NULL;
 238
 239         memset(&req, 0, sizeof(req));
 240
 241         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
 242         req.n.nlmsg_flags = NLM_F_REQUEST|flags;
 243         req.n.nlmsg_type = cmd;
 244         req.xsinfo.family = preferred_family;
 245
 246         req.xsinfo.lft.soft_byte_limit = XFRM_INF;
 247         req.xsinfo.lft.hard_byte_limit = XFRM_INF;
 248         req.xsinfo.lft.soft_packet_limit = XFRM_INF;
 249         req.xsinfo.lft.hard_packet_limit = XFRM_INF;
 250
 251         while (argc > 0) {
 252                 if (strcmp(*argv, "mode") == 0) {
 253                         NEXT_ARG();
 254                         xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
 255                 } else if (strcmp(*argv, "reqid") == 0) {
 256                         NEXT_ARG();
 257                         xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv);
 258                 } else if (strcmp(*argv, "seq") == 0) {
 259                         NEXT_ARG();
 260                         xfrm_seq_parse(&req.xsinfo.seq, &argc, &argv);
 261                 } else if (strcmp(*argv, "replay-window") == 0) {
 262                         NEXT_ARG();
 263                         if (get_u8(&req.xsinfo.replay_window, *argv, 0))
 264                                 invarg("\"replay-window\" value is invalid", *argv);
 265                 } else if (strcmp(*argv, "flag") == 0) {
 266                         NEXT_ARG();
 267                         xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv);
 268                 } else if (strcmp(*argv, "sel") == 0) {
 269                         NEXT_ARG();
 270                         xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv);
 271                 } else if (strcmp(*argv, "limit") == 0) {
 272                         NEXT_ARG();
 273                         xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv);
 274                 } else if (strcmp(*argv, "encap") == 0) {
 275                         struct xfrm_encap_tmpl encap;
 276                         inet_prefix oa;
 277                         NEXT_ARG();
 278                         xfrm_encap_type_parse(&encap.encap_type, &argc, &argv);
 279                         NEXT_ARG();
 280                         if (get_u16(&encap.encap_sport, *argv, 0))
 281                                 invarg("\"encap\" sport value is invalid", *argv);
 282                         encap.encap_sport = htons(encap.encap_sport);
 283                         NEXT_ARG();
 284                         if (get_u16(&encap.encap_dport, *argv, 0))
 285                                 invarg("\"encap\" dport value is invalid", *argv);
 286                         encap.encap_dport = htons(encap.encap_dport);
 287                         NEXT_ARG();
 288                         get_addr(&oa, *argv, AF_UNSPEC);
 289                         memcpy(&encap.encap_oa, &oa.data, sizeof(encap.encap_oa));
 290                         addattr_l(&req.n, sizeof(req.buf), XFRMA_ENCAP,
 291                                   (void *)&encap, sizeof(encap));
 292                 } else if (strcmp(*argv, "coa") == 0) {
 293                         inet_prefix coa;
 294                         xfrm_address_t xcoa;
 295
 296                         if (coap)
 297                                 duparg("coa", *argv);
 298                         coap = *argv;
 299
 300                         NEXT_ARG();
 301
 302                         get_prefix(&coa, *argv, preferred_family);
 303                         if (coa.family == AF_UNSPEC)
 304                                 invarg("\"coa\" address family is AF_UNSPEC", *argv);
 305                         if (coa.bytelen > sizeof(xcoa))
 306                                 invarg("\"coa\" address length is too large", *argv);
 307
 308                         memset(&xcoa, 0, sizeof(xcoa));
 309                         memcpy(&xcoa, &coa.data, coa.bytelen);
 310
 311                         addattr_l(&req.n, sizeof(req.buf), XFRMA_COADDR,
 312                                   (void *)&xcoa, sizeof(xcoa));
 313                 } else {
 314                         /* try to assume ALGO */
 315                         int type = xfrm_algotype_getbyname(*argv);
 316                         switch (type) {
 317                         case XFRMA_ALG_CRYPT:
 318                         case XFRMA_ALG_AUTH:
 319                         case XFRMA_ALG_COMP:
 320                         {
 321                                 /* ALGO */
 322                                 struct {
 323                                         struct xfrm_algo alg;
 324                                         char buf[XFRM_ALGO_KEY_BUF_SIZE];
 325                                 } alg;
 326                                 int len;
 327                                 char *name;
 328                                 char *key;
 329
 330                                 switch (type) {
 331                                 case XFRMA_ALG_CRYPT:
 332                                         if (ealgop)
 333                                                 duparg("ALGOTYPE", *argv);
 334                                         ealgop = *argv;
 335                                         break;
 336                                 case XFRMA_ALG_AUTH:
 337                                         if (aalgop)
 338                                                 duparg("ALGOTYPE", *argv);
 339                                         aalgop = *argv;
 340                                         break;
 341                                 case XFRMA_ALG_COMP:
 342                                         if (calgop)
 343                                                 duparg("ALGOTYPE", *argv);
 344                                         calgop = *argv;
 345                                         break;
 346                                 default:
 347                                         /* not reached */
 348                                         invarg("\"ALGOTYPE\" is invalid\n", *argv);
 349                                 }
 350
 351                                 if (!NEXT_ARG_OK())
 352                                         missarg("ALGONAME");
 353                                 NEXT_ARG();
 354                                 name = *argv;
 355
 356                                 if (!NEXT_ARG_OK())
 357                                         missarg("ALGOKEY");
 358                                 NEXT_ARG();
 359                                 key = *argv;
 360
 361                                 memset(&alg, 0, sizeof(alg));
 362
 363                                 xfrm_algo_parse((void *)&alg, type, name, key,
 364                                                 sizeof(alg.buf));
 365                                 len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;
 366
 367                                 addattr_l(&req.n, sizeof(req.buf), type,
 368                                           (void *)&alg, len);
 369                                 break;
 370                         }
 371                         default:
 372                                 /* try to assume ID */
 373                                 if (idp)
 374                                         invarg("unknown", *argv);
 375                                 idp = *argv;
 376
 377                                 /* ID */
 378                                 xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
 379                                               &req.xsinfo.family, 0, &argc, &argv);
 380                                 if (preferred_family == AF_UNSPEC)
 381                                         preferred_family = req.xsinfo.family;
 382                         }
 383                 }
 384                 argc--; argv++;
 385         }
 386
 387         if (!idp) {
 388                 fprintf(stderr, "Not enough information: \"ID\" is required\n");
 389                 exit(1);
 390         }
 391
 392         switch (req.xsinfo.mode) {
 393         case XFRM_MODE_TRANSPORT:
 394         case XFRM_MODE_TUNNEL:
 395                 if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
 396                         fprintf(stderr, "\"mode\" is invalid with proto=%s\n",
 397                                 strxf_xfrmproto(req.xsinfo.id.proto));
 398                         exit(1);
 399                 }
 400                 break;
 401         case XFRM_MODE_ROUTEOPTIMIZATION:
 402         case XFRM_MODE_IN_TRIGGER:
 403                 if (!xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) {
 404                         fprintf(stderr, "\"mode\" is invalid with proto=%s\n",
 405                                 strxf_xfrmproto(req.xsinfo.id.proto));
 406                         exit(1);
 407                 }
 408                 if (req.xsinfo.id.spi != 0) {
 409                         fprintf(stderr, "\"spi\" must be 0 with proto=%s\n",
 410                                 strxf_xfrmproto(req.xsinfo.id.proto));
 411                         exit(1);
 412                 }
 413                 break;
 414         default:
 415                 break;
 416         }
 417
 418         if (ealgop || aalgop || calgop) {
 419                 if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
 420                         fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n",
 421                                 strxf_xfrmproto(req.xsinfo.id.proto));
 422                         exit(1);
 423                 }
 424         } else {
 425                 if (xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
 426                         fprintf(stderr, "\"ALGO\" is required with proto=%s\n",
 427                                 strxf_xfrmproto(req.xsinfo.id.proto));
 428                         exit (1);
 429                 }
 430         }
 431
 432         if (coap) {
 433                 if (!xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) {
 434                         fprintf(stderr, "\"coa\" is invalid with proto=%s\n",
 435                                 strxf_xfrmproto(req.xsinfo.id.proto));
 436                         exit(1);
 437                 }
 438         } else {
 439                 if (xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) {
 440                         fprintf(stderr, "\"coa\" is required with proto=%s\n",
 441                                 strxf_xfrmproto(req.xsinfo.id.proto));
 442                         exit (1);
 443                 }
 444         }
 445
 446         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 447                 exit(1);
 448
 449         if (req.xsinfo.family == AF_UNSPEC)
 450                 req.xsinfo.family = AF_INET;
 451
 452         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 453                 exit(2);
 454
 455         rtnl_close(&rth);
 456
 457         return 0;
 458 }
 459
 460 static int xfrm_state_allocspi(int argc, char **argv)
 461 {
 462         struct rtnl_handle rth;
 463         struct {
 464                 struct nlmsghdr         n;
 465                 struct xfrm_userspi_info xspi;
 466                 char                    buf[RTA_BUF_SIZE];
 467         } req;
 468         char *idp = NULL;
 469         char *minp = NULL;
 470         char *maxp = NULL;
 471         char res_buf[NLMSG_BUF_SIZE];
 472         struct nlmsghdr *res_n = (struct nlmsghdr *)res_buf;
 473
 474         memset(res_buf, 0, sizeof(res_buf));
 475
 476         memset(&req, 0, sizeof(req));
 477
 478         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xspi));
 479         req.n.nlmsg_flags = NLM_F_REQUEST;
 480         req.n.nlmsg_type = XFRM_MSG_ALLOCSPI;
 481         req.xspi.info.family = preferred_family;
 482
 483 #if 0
 484         req.xsinfo.lft.soft_byte_limit = XFRM_INF;
 485         req.xsinfo.lft.hard_byte_limit = XFRM_INF;
 486         req.xsinfo.lft.soft_packet_limit = XFRM_INF;
 487         req.xsinfo.lft.hard_packet_limit = XFRM_INF;
 488 #endif
 489
 490         while (argc > 0) {
 491                 if (strcmp(*argv, "mode") == 0) {
 492                         NEXT_ARG();
 493                         xfrm_mode_parse(&req.xspi.info.mode, &argc, &argv);
 494                 } else if (strcmp(*argv, "reqid") == 0) {
 495                         NEXT_ARG();
 496                         xfrm_reqid_parse(&req.xspi.info.reqid, &argc, &argv);
 497                 } else if (strcmp(*argv, "seq") == 0) {
 498                         NEXT_ARG();
 499                         xfrm_seq_parse(&req.xspi.info.seq, &argc, &argv);
 500                 } else if (strcmp(*argv, "min") == 0) {
 501                         if (minp)
 502                                 duparg("min", *argv);
 503                         minp = *argv;
 504
 505                         NEXT_ARG();
 506
 507                         if (get_u32(&req.xspi.min, *argv, 0))
 508                                 invarg("\"min\" value is invalid", *argv);
 509                 } else if (strcmp(*argv, "max") == 0) {
 510                         if (maxp)
 511                                 duparg("max", *argv);
 512                         maxp = *argv;
 513
 514                         NEXT_ARG();
 515
 516                         if (get_u32(&req.xspi.max, *argv, 0))
 517                                 invarg("\"max\" value is invalid", *argv);
 518                 } else {
 519                         /* try to assume ID */
 520                         if (idp)
 521                                 invarg("unknown", *argv);
 522                         idp = *argv;
 523
 524                         /* ID */
 525                         xfrm_id_parse(&req.xspi.info.saddr, &req.xspi.info.id,
 526                                       &req.xspi.info.family, 0, &argc, &argv);
 527                         if (req.xspi.info.id.spi) {
 528                                 fprintf(stderr, "\"SPI\" must be zero\n");
 529                                 exit(1);
 530                         }
 531                         if (preferred_family == AF_UNSPEC)
 532                                 preferred_family = req.xspi.info.family;
 533                 }
 534                 argc--; argv++;
 535         }
 536
 537         if (!idp) {
 538                 fprintf(stderr, "Not enough information: \"ID\" is required\n");
 539                 exit(1);
 540         }
 541
 542         if (minp) {
 543                 if (!maxp) {
 544                         fprintf(stderr, "\"max\" is missing\n");
 545                         exit(1);
 546                 }
 547                 if (req.xspi.min > req.xspi.max) {
 548                         fprintf(stderr, "\"min\" valie is larger than \"max\" one\n");
 549                         exit(1);
 550                 }
 551         } else {
 552                 if (maxp) {
 553                         fprintf(stderr, "\"min\" is missing\n");
 554                         exit(1);
 555                 }
 556
 557                 /* XXX: Default value defined in PF_KEY;
 558                  * See kernel's net/key/af_key.c(pfkey_getspi).
 559                  */
 560                 req.xspi.min = 0x100;
 561                 req.xspi.max = 0x0fffffff;
 562
 563                 /* XXX: IPCOMP spi is 16-bits;
 564                  * See kernel's net/xfrm/xfrm_user(verify_userspi_info).
 565                  */
 566                 if (req.xspi.info.id.proto == IPPROTO_COMP)
 567                         req.xspi.max = 0xffff;
 568         }
 569
 570         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 571                 exit(1);
 572
 573         if (req.xspi.info.family == AF_UNSPEC)
 574                 req.xspi.info.family = AF_INET;
 575
 576
 577         if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
 578                 exit(2);
 579
 580         if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
 581                 fprintf(stderr, "An error :-)\n");
 582                 exit(1);
 583         }
 584
 585         rtnl_close(&rth);
 586
 587         return 0;
 588 }
 589
 590 static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo)
 591 {
 592         if (!filter.use)
 593                 return 1;
 594
 595         if (filter.id_src_mask)
 596                 if (xfrm_addr_match(&xsinfo->saddr, &filter.xsinfo.saddr,
 597                                     filter.id_src_mask))
 598                         return 0;
 599         if (filter.id_dst_mask)
 600                 if (xfrm_addr_match(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
 601                                     filter.id_dst_mask))
 602                         return 0;
 603         if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask)
 604                 return 0;
 605         if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask)
 606                 return 0;
 607         if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask)
 608                 return 0;
 609         if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask)
 610                 return 0;
 611         if (filter.state_flags_mask)
 612                 if ((xsinfo->flags & filter.xsinfo.flags) == 0)
 613                         return 0;
 614
 615         return 1;
 616 }
 617
 618 int xfrm_state_print(const struct sockaddr_nl *who, struct nlmsghdr *n,
 619                      void *arg)
 620 {
 621         FILE *fp = (FILE*)arg;
 622         struct rtattr * tb[XFRMA_MAX+1];
 623         struct rtattr * rta;
 624         struct xfrm_usersa_info *xsinfo = NULL;
 625         struct xfrm_user_expire *xexp = NULL;
 626         struct xfrm_usersa_id   *xsid = NULL;
 627         int len = n->nlmsg_len;
 628
 629         if (n->nlmsg_type != XFRM_MSG_NEWSA &&
 630             n->nlmsg_type != XFRM_MSG_DELSA &&
 631             n->nlmsg_type != XFRM_MSG_UPDSA &&
 632             n->nlmsg_type != XFRM_MSG_EXPIRE) {
 633                 fprintf(stderr, "Not a state: %08x %08x %08x\n",
 634                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 635                 return 0;
 636         }
 637
 638         if (n->nlmsg_type == XFRM_MSG_DELSA) {
 639                 /* Dont blame me for this .. Herbert made me do it */
 640                 xsid = NLMSG_DATA(n);
 641                 len -= NLMSG_SPACE(sizeof(*xsid));
 642         } else if (n->nlmsg_type == XFRM_MSG_EXPIRE) {
 643                 xexp = NLMSG_DATA(n);
 644                 xsinfo = &xexp->state;
 645                 len -= NLMSG_SPACE(sizeof(*xexp));
 646         } else {
 647                 xexp = NULL;
 648                 xsinfo = NLMSG_DATA(n);
 649                 len -= NLMSG_SPACE(sizeof(*xsinfo));
 650         }
 651
 652         if (len < 0) {
 653                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 654                 return -1;
 655         }
 656
 657         if (xsinfo && !xfrm_state_filter_match(xsinfo))
 658                 return 0;
 659
 660         if (n->nlmsg_type == XFRM_MSG_DELSA)
 661                 fprintf(fp, "Deleted ");
 662         else if (n->nlmsg_type == XFRM_MSG_UPDSA)
 663                 fprintf(fp, "Updated ");
 664         else if (n->nlmsg_type == XFRM_MSG_EXPIRE)
 665                 fprintf(fp, "Expired ");
 666
 667         if (n->nlmsg_type == XFRM_MSG_DELSA)
 668                 rta = XFRMSID_RTA(xsid);
 669         else if (n->nlmsg_type == XFRM_MSG_EXPIRE)
 670                 rta = XFRMEXP_RTA(xexp);
 671         else
 672                 rta = XFRMS_RTA(xsinfo);
 673
 674         parse_rtattr(tb, XFRMA_MAX, rta, len);
 675
 676         if (n->nlmsg_type == XFRM_MSG_DELSA) {
 677                 //xfrm_policy_id_print();
 678
 679                 if (!tb[XFRMA_SA]) {
 680                         fprintf(stderr, "Buggy XFRM_MSG_DELSA: no XFRMA_SA\n");
 681                         return -1;
 682                 }
 683                 if (RTA_PAYLOAD(tb[XFRMA_SA]) < sizeof(*xsinfo)) {
 684                         fprintf(stderr, "Buggy XFRM_MSG_DELPOLICY: too short XFRMA_POLICY len\n");
 685                         return -1;
 686                 }
 687                 xsinfo = RTA_DATA(tb[XFRMA_SA]);
 688         }
 689
 690         xfrm_state_info_print(xsinfo, tb, fp, NULL, NULL);
 691
 692         if (n->nlmsg_type == XFRM_MSG_EXPIRE) {
 693                 fprintf(fp, "\t");
 694                 fprintf(fp, "hard %u", xexp->hard);
 695                 fprintf(fp, "%s", _SL_);
 696         }
 697
 698         if (oneline)
 699                 fprintf(fp, "\n");
 700         fflush(fp);
 701
 702         return 0;
 703 }
 704
 705 static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
 706 {
 707         struct rtnl_handle rth;
 708         struct {
 709                 struct nlmsghdr         n;
 710                 struct xfrm_usersa_id   xsid;
 711                 char                    buf[RTA_BUF_SIZE];
 712         } req;
 713         struct xfrm_id id;
 714         char *idp = NULL;
 715
 716         memset(&req, 0, sizeof(req));
 717
 718         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
 719         req.n.nlmsg_flags = NLM_F_REQUEST;
 720         req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
 721         req.xsid.family = preferred_family;
 722
 723         while (argc > 0) {
 724                 xfrm_address_t saddr;
 725
 726                 if (idp)
 727                         invarg("unknown", *argv);
 728                 idp = *argv;
 729
 730                 /* ID */
 731                 memset(&id, 0, sizeof(id));
 732                 memset(&saddr, 0, sizeof(saddr));
 733                 xfrm_id_parse(&saddr, &id, &req.xsid.family, 0,
 734                               &argc, &argv);
 735
 736                 memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
 737                 req.xsid.spi = id.spi;
 738                 req.xsid.proto = id.proto;
 739
 740                 addattr_l(&req.n, sizeof(req.buf), XFRMA_SRCADDR,
 741                           (void *)&saddr, sizeof(saddr));
 742
 743                 argc--; argv++;
 744         }
 745
 746         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 747                 exit(1);
 748
 749         if (req.xsid.family == AF_UNSPEC)
 750                 req.xsid.family = AF_INET;
 751
 752         if (delete) {
 753                 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
 754                         exit(2);
 755         } else {
 756                 char buf[NLMSG_BUF_SIZE];
 757                 struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
 758
 759                 memset(buf, 0, sizeof(buf));
 760
 761                 if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
 762                         exit(2);
 763
 764                 if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
 765                         fprintf(stderr, "An error :-)\n");
 766                         exit(1);
 767                 }
 768         }
 769
 770         rtnl_close(&rth);
 771
 772         return 0;
 773 }
 774
 775 /*
 776  * With an existing state of nlmsg, make new nlmsg for deleting the state
 777  * and store it to buffer.
 778  */
 779 static int xfrm_state_keep(const struct sockaddr_nl *who,
 780                            struct nlmsghdr *n,
 781                            void *arg)
 782 {
 783         struct xfrm_buffer *xb = (struct xfrm_buffer *)arg;
 784         struct rtnl_handle *rth = xb->rth;
 785         struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
 786         int len = n->nlmsg_len;
 787         struct nlmsghdr *new_n;
 788         struct xfrm_usersa_id *xsid;
 789
 790         if (n->nlmsg_type != XFRM_MSG_NEWSA) {
 791                 fprintf(stderr, "Not a state: %08x %08x %08x\n",
 792                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 793                 return 0;
 794         }
 795
 796         len -= NLMSG_LENGTH(sizeof(*xsinfo));
 797         if (len < 0) {
 798                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 799                 return -1;
 800         }
 801
 802         if (!xfrm_state_filter_match(xsinfo))
 803                 return 0;
 804
 805         if (xb->offset > xb->size) {
 806                 fprintf(stderr, "State buffer overflow\n");
 807                 return -1;
 808         }
 809
 810         new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
 811         new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid));
 812         new_n->nlmsg_flags = NLM_F_REQUEST;
 813         new_n->nlmsg_type = XFRM_MSG_DELSA;
 814         new_n->nlmsg_seq = ++rth->seq;
 815
 816         xsid = NLMSG_DATA(new_n);
 817         xsid->family = xsinfo->family;
 818         memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr));
 819         xsid->spi = xsinfo->id.spi;
 820         xsid->proto = xsinfo->id.proto;
 821
 822         addattr_l(new_n, xb->size, XFRMA_SRCADDR, &xsinfo->saddr,
 823                   sizeof(xsid->daddr));
 824
 825         xb->offset += new_n->nlmsg_len;
 826         xb->nlmsg_count ++;
 827
 828         return 0;
 829 }
 830
 831 static int xfrm_state_list_or_deleteall(int argc, char **argv, int deleteall)
 832 {
 833         char *idp = NULL;
 834         struct rtnl_handle rth;
 835
 836         if(argc > 0)
 837                 filter.use = 1;
 838         filter.xsinfo.family = preferred_family;
 839
 840         while (argc > 0) {
 841                 if (strcmp(*argv, "mode") == 0) {
 842                         NEXT_ARG();
 843                         xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv);
 844
 845                         filter.mode_mask = XFRM_FILTER_MASK_FULL;
 846
 847                 } else if (strcmp(*argv, "reqid") == 0) {
 848                         NEXT_ARG();
 849                         xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv);
 850
 851                         filter.reqid_mask = XFRM_FILTER_MASK_FULL;
 852
 853                 } else if (strcmp(*argv, "flag") == 0) {
 854                         NEXT_ARG();
 855                         xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv);
 856
 857                         filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
 858
 859                 } else {
 860                         if (idp)
 861                                 invarg("unknown", *argv);
 862                         idp = *argv;
 863
 864                         /* ID */
 865                         xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id,
 866                                       &filter.xsinfo.family, 1, &argc, &argv);
 867                         if (preferred_family == AF_UNSPEC)
 868                                 preferred_family = filter.xsinfo.family;
 869                 }
 870                 argc--; argv++;
 871         }
 872
 873         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
 874                 exit(1);
 875
 876         if (deleteall) {
 877                 struct xfrm_buffer xb;
 878                 char buf[NLMSG_DELETEALL_BUF_SIZE];
 879                 int i;
 880
 881                 xb.buf = buf;
 882                 xb.size = sizeof(buf);
 883                 xb.rth = &rth;
 884
 885                 for (i = 0; ; i++) {
 886                         xb.offset = 0;
 887                         xb.nlmsg_count = 0;
 888
 889                         if (show_stats > 1)
 890                                 fprintf(stderr, "Delete-all round = %d\n", i);
 891
 892                         if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 893                                 perror("Cannot send dump request");
 894                                 exit(1);
 895                         }
 896
 897                         if (rtnl_dump_filter(&rth, xfrm_state_keep, &xb, NULL, NULL) < 0) {
 898                                 fprintf(stderr, "Delete-all terminated\n");
 899                                 exit(1);
 900                         }
 901                         if (xb.nlmsg_count == 0) {
 902                                 if (show_stats > 1)
 903                                         fprintf(stderr, "Delete-all completed\n");
 904                                 break;
 905                         }
 906
 907                         if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
 908                                 perror("Failed to send delete-all request\n");
 909                                 exit(1);
 910                         }
 911                         if (show_stats > 1)
 912                                 fprintf(stderr, "Delete-all nlmsg count = %d\n", xb.nlmsg_count);
 913
 914                         xb.offset = 0;
 915                         xb.nlmsg_count = 0;
 916                 }
 917
 918         } else {
 919                 if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 920                         perror("Cannot send dump request");
 921                         exit(1);
 922                 }
 923
 924                 if (rtnl_dump_filter(&rth, xfrm_state_print, stdout, NULL, NULL) < 0) {
 925                         fprintf(stderr, "Dump terminated\n");
 926                         exit(1);
 927                 }
 928         }
 929
 930         rtnl_close(&rth);
 931
 932         exit(0);
 933 }
 934
 935 int print_sadinfo(struct nlmsghdr *n, void *arg)
 936 {
 937         FILE *fp = (FILE*)arg;
 938         __u32 *f = NLMSG_DATA(n);
 939         struct rtattr *tb[XFRMA_SAD_MAX+1];
 940         struct rtattr *rta;
 941         __u32 *cnt;
 942
 943         int len = n->nlmsg_len;
 944
 945         len -= NLMSG_LENGTH(sizeof(__u32));
 946         if (len < 0) {
 947                 fprintf(stderr, "SADinfo: Wrong len %d\n", len);
 948                 return -1;
 949         }
 950
 951         rta = XFRMSAPD_RTA(f);
 952         parse_rtattr(tb, XFRMA_SAD_MAX, rta, len);
 953
 954         if (tb[XFRMA_SAD_CNT]) {
 955                 fprintf(fp,"\t SAD");
 956                 cnt = (__u32 *)RTA_DATA(tb[XFRMA_SAD_CNT]);
 957                 fprintf(fp," count %d", *cnt);
 958         } else {
 959                 fprintf(fp,"BAD SAD info returned\n");
 960                 return -1;
 961         }
 962
 963         if (show_stats) {
 964                 if (tb[XFRMA_SAD_HINFO]) {
 965                         struct xfrmu_sadhinfo *si;
 966
 967                         if (RTA_PAYLOAD(tb[XFRMA_SAD_HINFO]) < sizeof(*si)) {
 968                                 fprintf(fp,"BAD SAD length returned\n");
 969                                 return -1;
 970                         }
 971
 972                         si = RTA_DATA(tb[XFRMA_SAD_HINFO]);
 973                         fprintf(fp," (buckets ");
 974                         fprintf(fp,"count %d", si->sadhcnt);
 975                         fprintf(fp," Max %d", si->sadhmcnt);
 976                         fprintf(fp,")");
 977                 }
 978         }
 979         fprintf(fp,"\n");
 980
 981         return 0;
 982 }
 983
 984 static int xfrm_sad_getinfo(int argc, char **argv)
 985 {
 986         struct rtnl_handle rth;
 987         struct {
 988                 struct nlmsghdr                 n;
 989                 __u32                           flags;
 990                 char                            ans[64];
 991         } req;
 992
 993         memset(&req, 0, sizeof(req));
 994         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.flags));
 995         req.n.nlmsg_flags = NLM_F_REQUEST;
 996         req.n.nlmsg_type = XFRM_MSG_GETSADINFO;
 997         req.flags = 0XFFFFFFFF;
 998
 999         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
1000                 exit(1);
1001
1002         if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1003                 exit(2);
1004
1005         print_sadinfo(&req.n, (void*)stdout);
1006
1007         rtnl_close(&rth);
1008
1009         return 0;
1010 }
1011
1012 static int xfrm_state_flush(int argc, char **argv)
1013 {
1014         struct rtnl_handle rth;
1015         struct {
1016                 struct nlmsghdr                 n;
1017                 struct xfrm_usersa_flush        xsf;
1018         } req;
1019         char *protop = NULL;
1020
1021         memset(&req, 0, sizeof(req));
1022
1023         req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf));
1024         req.n.nlmsg_flags = NLM_F_REQUEST;
1025         req.n.nlmsg_type = XFRM_MSG_FLUSHSA;
1026         req.xsf.proto = 0;
1027
1028         while (argc > 0) {
1029                 if (strcmp(*argv, "proto") == 0) {
1030                         int ret;
1031
1032                         if (protop)
1033                                 duparg("proto", *argv);
1034                         protop = *argv;
1035
1036                         NEXT_ARG();
1037
1038                         ret = xfrm_xfrmproto_getbyname(*argv);
1039                         if (ret < 0)
1040                                 invarg("\"XFRM_PROTO\" is invalid", *argv);
1041
1042                         req.xsf.proto = (__u8)ret;
1043                 } else
1044                         invarg("unknown", *argv);
1045
1046                 argc--; argv++;
1047         }
1048
1049         if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
1050                 exit(1);
1051
1052         if (show_stats > 1)
1053                 fprintf(stderr, "Flush state proto=%s\n",
1054                         (req.xsf.proto == IPSEC_PROTO_ANY) ? "any" :
1055                         strxf_xfrmproto(req.xsf.proto));
1056
1057         if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
1058                 exit(2);
1059
1060         rtnl_close(&rth);
1061
1062         return 0;
1063 }
1064
1065 int do_xfrm_state(int argc, char **argv)
1066 {
1067         if (argc < 1)
1068                 return xfrm_state_list_or_deleteall(0, NULL, 0);
1069
1070         if (matches(*argv, "add") == 0)
1071                 return xfrm_state_modify(XFRM_MSG_NEWSA, 0,
1072                                          argc-1, argv+1);
1073         if (matches(*argv, "update") == 0)
1074                 return xfrm_state_modify(XFRM_MSG_UPDSA, 0,
1075                                          argc-1, argv+1);
1076         if (matches(*argv, "allocspi") == 0)
1077                 return xfrm_state_allocspi(argc-1, argv+1);
1078         if (matches(*argv, "delete") == 0)
1079                 return xfrm_state_get_or_delete(argc-1, argv+1, 1);
1080         if (matches(*argv, "deleteall") == 0 || matches(*argv, "delall") == 0)
1081                 return xfrm_state_list_or_deleteall(argc-1, argv+1, 1);
1082         if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1083             || matches(*argv, "lst") == 0)
1084                 return xfrm_state_list_or_deleteall(argc-1, argv+1, 0);
1085         if (matches(*argv, "get") == 0)
1086                 return xfrm_state_get_or_delete(argc-1, argv+1, 0);
1087         if (matches(*argv, "flush") == 0)
1088                 return xfrm_state_flush(argc-1, argv+1);
1089         if (matches(*argv, "count") == 0) {
1090                 return xfrm_sad_getinfo(argc, argv);
1091         }
1092         if (matches(*argv, "help") == 0)
1093                 usage();
1094         fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
1095         exit(-1);
1096 }