ip/ipxfrm.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 ip.c, 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 <sys/types.h>
  32 #include <sys/socket.h>
  33 #include <time.h>
  34 #include <netdb.h>
  35 #include <net/if.h>
  36 #include <linux/netlink.h>
  37 #include <linux/rtnetlink.h>
  38 #include <linux/xfrm.h>
  39
  40 #include "utils.h"
  41 #include "xfrm.h"
  42
  43 #define STRBUF_SIZE     (128)
  44 #define STRBUF_CAT(buf, str) \
  45         do { \
  46                 int rest = sizeof(buf) - 1 - strlen(buf); \
  47                 if (rest > 0) { \
  48                         int len = strlen(str); \
  49                         if (len > rest) \
  50                                 len = rest; \
  51                         strncat(buf, str, len); \
  52                         buf[sizeof(buf) - 1] = '\0'; \
  53                 } \
  54         } while(0);
  55
  56 struct xfrm_filter filter;
  57
  58 static void usage(void) __attribute__((noreturn));
  59
  60 static void usage(void)
  61 {
  62         fprintf(stderr,
  63                 "Usage: ip xfrm XFRM_OBJECT { COMMAND | help }\n"
  64                 "where  XFRM_OBJECT := { state | policy | monitor }\n");
  65         exit(-1);
  66 }
  67
  68 /* This is based on utils.c(inet_addr_match) */
  69 int xfrm_addr_match(xfrm_address_t *x1, xfrm_address_t *x2, int bits)
  70 {
  71         __u32 *a1 = (__u32 *)x1;
  72         __u32 *a2 = (__u32 *)x2;
  73         int words = bits >> 0x05;
  74
  75         bits &= 0x1f;
  76
  77         if (words)
  78                 if (memcmp(a1, a2, words << 2))
  79                         return -1;
  80
  81         if (bits) {
  82                 __u32 w1, w2;
  83                 __u32 mask;
  84
  85                 w1 = a1[words];
  86                 w2 = a2[words];
  87
  88                 mask = htonl((0xffffffff) << (0x20 - bits));
  89
  90                 if ((w1 ^ w2) & mask)
  91                         return 1;
  92         }
  93
  94         return 0;
  95 }
  96
  97 struct typeent {
  98         const char *t_name;
  99         int t_type;
 100 };
 101
 102 static const struct typeent xfrmproto_types[]= {
 103         { "esp", IPPROTO_ESP }, { "ah", IPPROTO_AH }, { "comp", IPPROTO_COMP },
 104         { NULL, -1 }
 105 };
 106
 107 int xfrm_xfrmproto_getbyname(char *name)
 108 {
 109         int i;
 110
 111         for (i = 0; ; i++) {
 112                 const struct typeent *t = &xfrmproto_types[i];
 113                 if (!t->t_name || t->t_type == -1)
 114                         break;
 115
 116                 if (strcmp(t->t_name, name) == 0)
 117                         return t->t_type;
 118         }
 119
 120         return -1;
 121 }
 122
 123 const char *strxf_xfrmproto(__u8 proto)
 124 {
 125         int i;
 126
 127         for (i = 0; ; i++) {
 128                 const struct typeent *t = &xfrmproto_types[i];
 129                 if (!t->t_name || t->t_type == -1)
 130                         break;
 131
 132                 if (t->t_type == proto)
 133                         return t->t_name;
 134         }
 135
 136         return NULL;
 137 }
 138
 139 static const struct typeent algo_types[]= {
 140         { "enc", XFRMA_ALG_CRYPT }, { "auth", XFRMA_ALG_AUTH },
 141         { "comp", XFRMA_ALG_COMP }, { NULL, -1 }
 142 };
 143
 144 int xfrm_algotype_getbyname(char *name)
 145 {
 146         int i;
 147
 148         for (i = 0; ; i++) {
 149                 const struct typeent *t = &algo_types[i];
 150                 if (!t->t_name || t->t_type == -1)
 151                         break;
 152
 153                 if (strcmp(t->t_name, name) == 0)
 154                         return t->t_type;
 155         }
 156
 157         return -1;
 158 }
 159
 160 const char *strxf_algotype(int type)
 161 {
 162         int i;
 163
 164         for (i = 0; ; i++) {
 165                 const struct typeent *t = &algo_types[i];
 166                 if (!t->t_name || t->t_type == -1)
 167                         break;
 168
 169                 if (t->t_type == type)
 170                         return t->t_name;
 171         }
 172
 173         return NULL;
 174 }
 175
 176 const char *strxf_mask8(__u8 mask)
 177 {
 178         static char str[16];
 179         const int sn = sizeof(mask) * 8 - 1;
 180         __u8 b;
 181         int i = 0;
 182
 183         for (b = (1 << sn); b > 0; b >>= 1)
 184                 str[i++] = ((b & mask) ? '1' : '0');
 185         str[i] = '\0';
 186
 187         return str;
 188 }
 189
 190 const char *strxf_mask32(__u32 mask)
 191 {
 192         static char str[16];
 193
 194         sprintf(str, "%.8x", mask);
 195
 196         return str;
 197 }
 198
 199 const char *strxf_share(__u8 share)
 200 {
 201         static char str[32];
 202
 203         switch (share) {
 204         case XFRM_SHARE_ANY:
 205                 strcpy(str, "any");
 206                 break;
 207         case XFRM_SHARE_SESSION:
 208                 strcpy(str, "session");
 209                 break;
 210         case XFRM_SHARE_USER:
 211                 strcpy(str, "user");
 212                 break;
 213         case XFRM_SHARE_UNIQUE:
 214                 strcpy(str, "unique");
 215                 break;
 216         default:
 217                 sprintf(str, "%u", share);
 218                 break;
 219         }
 220
 221         return str;
 222 }
 223
 224 const char *strxf_proto(__u8 proto)
 225 {
 226         static char buf[32];
 227         struct protoent *pp;
 228         const char *p;
 229
 230         pp = getprotobynumber(proto);
 231         if (pp)
 232                 p = pp->p_name;
 233         else {
 234                 sprintf(buf, "%u", proto);
 235                 p = buf;
 236         }
 237
 238         return p;
 239 }
 240
 241 void xfrm_id_info_print(xfrm_address_t *saddr, struct xfrm_id *id,
 242                         __u8 mode, __u32 reqid, __u16 family, int force_spi,
 243                         FILE *fp, const char *prefix, const char *title)
 244 {
 245         char abuf[256];
 246
 247         if (title)
 248                 fprintf(fp, title);
 249
 250         memset(abuf, '\0', sizeof(abuf));
 251         fprintf(fp, "src %s ", rt_addr_n2a(family, sizeof(*saddr),
 252                                            saddr, abuf, sizeof(abuf)));
 253         memset(abuf, '\0', sizeof(abuf));
 254         fprintf(fp, "dst %s", rt_addr_n2a(family, sizeof(id->daddr),
 255                                           &id->daddr, abuf, sizeof(abuf)));
 256         fprintf(fp, "%s", _SL_);
 257
 258         if (prefix)
 259                 fprintf(fp, prefix);
 260         fprintf(fp, "\t");
 261
 262         fprintf(fp, "proto %s ", strxf_xfrmproto(id->proto));
 263
 264         if (show_stats > 0 || force_spi || id->spi) {
 265                 __u32 spi = ntohl(id->spi);
 266                 fprintf(fp, "spi 0x%08x", spi);
 267                 if (show_stats > 0)
 268                         fprintf(fp, "(%u)", spi);
 269                 fprintf(fp, " ");
 270         }
 271
 272         fprintf(fp, "reqid %u", reqid);
 273         if (show_stats > 0)
 274                 fprintf(fp, "(0x%08x)", reqid);
 275         fprintf(fp, " ");
 276
 277         fprintf(fp, "mode ");
 278         switch (mode) {
 279         case 0:
 280                 fprintf(fp, "transport");
 281                 break;
 282         case 1:
 283                 fprintf(fp, "tunnel");
 284                 break;
 285         case 4:
 286                 fprintf(fp, "beet");
 287                 break;
 288         default:
 289                 fprintf(fp, "%u", mode);
 290                 break;
 291         }
 292         fprintf(fp, "%s", _SL_);
 293 }
 294
 295 static const char *strxf_limit(__u64 limit)
 296 {
 297         static char str[32];
 298         if (limit == XFRM_INF)
 299                 strcpy(str, "(INF)");
 300         else
 301                 sprintf(str, "%llu", (unsigned long long) limit);
 302
 303         return str;
 304 }
 305
 306 void xfrm_stats_print(struct xfrm_stats *s, FILE *fp, const char *prefix)
 307 {
 308         if (prefix)
 309                 fprintf(fp, prefix);
 310         fprintf(fp, "stats:");
 311         fprintf(fp, "%s", _SL_);
 312
 313         if (prefix)
 314                 fprintf(fp, prefix);
 315         fprintf(fp, "  ");
 316         fprintf(fp, "replay-window %u ", s->replay_window);
 317         fprintf(fp, "replay %u ", s->replay);
 318         fprintf(fp, "failed %u", s->integrity_failed);
 319         fprintf(fp, "%s", _SL_);
 320 }
 321
 322 static const char *strxf_time(__u64 time)
 323 {
 324         static char str[32];
 325
 326         if (time == 0)
 327                 strcpy(str, "-");
 328         else {
 329                 time_t t;
 330                 struct tm *tp;
 331
 332                 /* XXX: treat time in the same manner of kernel's
 333                  * net/xfrm/xfrm_{user,state}.c
 334                  */
 335                 t = (long)time;
 336                 tp = localtime(&t);
 337
 338                 strftime(str, sizeof(str), "%Y-%m-%d %T", tp);
 339         }
 340
 341         return str;
 342 }
 343
 344 void xfrm_lifetime_print(struct xfrm_lifetime_cfg *cfg,
 345                          struct xfrm_lifetime_cur *cur,
 346                          FILE *fp, const char *prefix)
 347 {
 348         if (cfg) {
 349                 if (prefix)
 350                         fprintf(fp, prefix);
 351                 fprintf(fp, "lifetime config:");
 352                 fprintf(fp, "%s", _SL_);
 353
 354                 if (prefix)
 355                         fprintf(fp, prefix);
 356                 fprintf(fp, "  ");
 357                 fprintf(fp, "limit: ");
 358                 fprintf(fp, "soft ");
 359                 fprintf(fp, strxf_limit(cfg->soft_byte_limit));
 360                 fprintf(fp, "(bytes), hard ");
 361                 fprintf(fp, strxf_limit(cfg->hard_byte_limit));
 362                 fprintf(fp, "(bytes)");
 363                 fprintf(fp, "%s", _SL_);
 364
 365                 if (prefix)
 366                         fprintf(fp, prefix);
 367                 fprintf(fp, "  ");
 368                 fprintf(fp, "limit: ");
 369                 fprintf(fp, "soft ");
 370                 fprintf(fp, strxf_limit(cfg->soft_packet_limit));
 371                 fprintf(fp, "(packets), hard ");
 372                 fprintf(fp, strxf_limit(cfg->hard_packet_limit));
 373                 fprintf(fp, "(packets)");
 374                 fprintf(fp, "%s", _SL_);
 375
 376                 if (prefix)
 377                         fprintf(fp, prefix);
 378                 fprintf(fp, "  ");
 379                 fprintf(fp, "expire add: ");
 380                 fprintf(fp, "soft ");
 381                 fprintf(fp, "%llu", (unsigned long long) cfg->soft_add_expires_seconds);
 382                 fprintf(fp, "(sec), hard ");
 383                 fprintf(fp, "%llu", (unsigned long long) cfg->hard_add_expires_seconds);
 384                 fprintf(fp, "(sec)");
 385                 fprintf(fp, "%s", _SL_);
 386
 387                 if (prefix)
 388                         fprintf(fp, prefix);
 389                 fprintf(fp, "  ");
 390                 fprintf(fp, "expire use: ");
 391                 fprintf(fp, "soft ");
 392                 fprintf(fp, "%llu", (unsigned long long) cfg->soft_use_expires_seconds);
 393                 fprintf(fp, "(sec), hard ");
 394                 fprintf(fp, "%llu", (unsigned long long) cfg->hard_use_expires_seconds);
 395                 fprintf(fp, "(sec)");
 396                 fprintf(fp, "%s", _SL_);
 397         }
 398         if (cur) {
 399                 if (prefix)
 400                         fprintf(fp, prefix);
 401                 fprintf(fp, "lifetime current:");
 402                 fprintf(fp, "%s", _SL_);
 403
 404                 if (prefix)
 405                         fprintf(fp, prefix);
 406                 fprintf(fp, "  ");
 407                 fprintf(fp, "%llu(bytes), ", (unsigned long long) cur->bytes);
 408                 fprintf(fp, "%llu(packets)", (unsigned long long) cur->packets);
 409                 fprintf(fp, "%s", _SL_);
 410
 411                 if (prefix)
 412                         fprintf(fp, prefix);
 413                 fprintf(fp, "  ");
 414                 fprintf(fp, "add %s ", strxf_time(cur->add_time));
 415                 fprintf(fp, "use %s", strxf_time(cur->use_time));
 416                 fprintf(fp, "%s", _SL_);
 417         }
 418 }
 419
 420 void xfrm_selector_print(struct xfrm_selector *sel, __u16 family,
 421                          FILE *fp, const char *prefix)
 422 {
 423         char abuf[256];
 424         __u16 f;
 425
 426         f = sel->family;
 427         if (f == AF_UNSPEC)
 428                 f = family;
 429         if (f == AF_UNSPEC)
 430                 f = preferred_family;
 431
 432         if (prefix)
 433                 fprintf(fp, prefix);
 434
 435         memset(abuf, '\0', sizeof(abuf));
 436         fprintf(fp, "src %s/%u ", rt_addr_n2a(f, sizeof(sel->saddr),
 437                                               &sel->saddr, abuf, sizeof(abuf)),
 438                 sel->prefixlen_s);
 439
 440         memset(abuf, '\0', sizeof(abuf));
 441         fprintf(fp, "dst %s/%u ", rt_addr_n2a(f, sizeof(sel->daddr),
 442                                               &sel->daddr, abuf, sizeof(abuf)),
 443                 sel->prefixlen_d);
 444
 445         if (sel->proto)
 446                 fprintf(fp, "proto %s ", strxf_proto(sel->proto));
 447         switch (sel->proto) {
 448         case IPPROTO_TCP:
 449         case IPPROTO_UDP:
 450         case IPPROTO_SCTP:
 451         case IPPROTO_DCCP:
 452         default: /* XXX */
 453                 if (sel->sport_mask)
 454                         fprintf(fp, "sport %u ", ntohs(sel->sport));
 455                 if (sel->dport_mask)
 456                         fprintf(fp, "dport %u ", ntohs(sel->dport));
 457                 break;
 458         case IPPROTO_ICMP:
 459         case IPPROTO_ICMPV6:
 460                 /* type/code is stored at sport/dport in selector */
 461                 if (sel->sport_mask)
 462                         fprintf(fp, "type %u ", ntohs(sel->sport));
 463                 if (sel->dport_mask)
 464                         fprintf(fp, "code %u ", ntohs(sel->dport));
 465                 break;
 466         }
 467
 468         if (sel->ifindex > 0) {
 469                 char buf[IFNAMSIZ];
 470
 471                 memset(buf, '\0', sizeof(buf));
 472                 if_indextoname(sel->ifindex, buf);
 473                 fprintf(fp, "dev %s ", buf);
 474         }
 475
 476         if (show_stats > 0)
 477                 fprintf(fp, "uid %u", sel->user);
 478
 479         fprintf(fp, "%s", _SL_);
 480 }
 481
 482 static void xfrm_algo_print(struct xfrm_algo *algo, int type, int len,
 483                             FILE *fp, const char *prefix)
 484 {
 485         int keylen;
 486         int i;
 487
 488         if (prefix)
 489                 fprintf(fp, prefix);
 490
 491         fprintf(fp, "%s ", strxf_algotype(type));
 492
 493         if (len < sizeof(*algo)) {
 494                 fprintf(fp, "(ERROR truncated)");
 495                 goto fin;
 496         }
 497         len -= sizeof(*algo);
 498
 499         fprintf(fp, "%s ", algo->alg_name);
 500
 501         keylen = algo->alg_key_len / 8;
 502         if (len < keylen) {
 503                 fprintf(fp, "(ERROR truncated)");
 504                 goto fin;
 505         }
 506
 507         fprintf(fp, "0x");
 508         for (i = 0; i < keylen; i ++)
 509                 fprintf(fp, "%.2x", (unsigned char)algo->alg_key[i]);
 510
 511         if (show_stats > 0)
 512                 fprintf(fp, " (%d bits)", algo->alg_key_len);
 513
 514  fin:
 515         fprintf(fp, "%s", _SL_);
 516 }
 517
 518 static void xfrm_tmpl_print(struct xfrm_user_tmpl *tmpls, int len,
 519                             __u16 family, FILE *fp, const char *prefix)
 520 {
 521         int ntmpls = len / sizeof(struct xfrm_user_tmpl);
 522         int i;
 523
 524         if (ntmpls <= 0) {
 525                 if (prefix)
 526                         fprintf(fp, prefix);
 527                 fprintf(fp, "(ERROR \"tmpl\" truncated)");
 528                 fprintf(fp, "%s", _SL_);
 529                 return;
 530         }
 531
 532         for (i = 0; i < ntmpls; i++) {
 533                 struct xfrm_user_tmpl *tmpl = &tmpls[i];
 534
 535                 if (prefix)
 536                         fprintf(fp, prefix);
 537
 538                 xfrm_id_info_print(&tmpl->saddr, &tmpl->id, tmpl->mode,
 539                                    tmpl->reqid, family, 0, fp, prefix, "tmpl ");
 540
 541                 if (show_stats > 0 || tmpl->optional) {
 542                         if (prefix)
 543                                 fprintf(fp, prefix);
 544                         fprintf(fp, "\t");
 545                         switch (tmpl->optional) {
 546                         case 0:
 547                                 if (show_stats > 0)
 548                                         fprintf(fp, "level required ");
 549                                 break;
 550                         case 1:
 551                                 fprintf(fp, "level use ");
 552                                 break;
 553                         default:
 554                                 fprintf(fp, "level %u ", tmpl->optional);
 555                                 break;
 556                         }
 557
 558                         if (show_stats > 0)
 559                                 fprintf(fp, "share %s ", strxf_share(tmpl->share));
 560
 561                         fprintf(fp, "%s", _SL_);
 562                 }
 563
 564                 if (show_stats > 0) {
 565                         if (prefix)
 566                                 fprintf(fp, prefix);
 567                         fprintf(fp, "\t");
 568                         fprintf(fp, "%s-mask %s ",
 569                                 strxf_algotype(XFRMA_ALG_CRYPT),
 570                                 strxf_mask32(tmpl->ealgos));
 571                         fprintf(fp, "%s-mask %s ",
 572                                 strxf_algotype(XFRMA_ALG_AUTH),
 573                                 strxf_mask32(tmpl->aalgos));
 574                         fprintf(fp, "%s-mask %s",
 575                                 strxf_algotype(XFRMA_ALG_COMP),
 576                                 strxf_mask32(tmpl->calgos));
 577
 578                         fprintf(fp, "%s", _SL_);
 579                 }
 580         }
 581 }
 582
 583 void xfrm_xfrma_print(struct rtattr *tb[], __u16 family,
 584                       FILE *fp, const char *prefix)
 585 {
 586         if (tb[XFRMA_ALG_AUTH]) {
 587                 struct rtattr *rta = tb[XFRMA_ALG_AUTH];
 588                 xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
 589                                 XFRMA_ALG_AUTH, RTA_PAYLOAD(rta), fp, prefix);
 590         }
 591
 592         if (tb[XFRMA_ALG_CRYPT]) {
 593                 struct rtattr *rta = tb[XFRMA_ALG_CRYPT];
 594                 xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
 595                                 XFRMA_ALG_CRYPT, RTA_PAYLOAD(rta), fp, prefix);
 596         }
 597
 598         if (tb[XFRMA_ALG_COMP]) {
 599                 struct rtattr *rta = tb[XFRMA_ALG_COMP];
 600                 xfrm_algo_print((struct xfrm_algo *) RTA_DATA(rta),
 601                                 XFRMA_ALG_COMP, RTA_PAYLOAD(rta), fp, prefix);
 602         }
 603
 604         if (tb[XFRMA_ENCAP]) {
 605                 struct xfrm_encap_tmpl *e;
 606                 char abuf[256];
 607
 608                 if (prefix)
 609                         fprintf(fp, prefix);
 610                 fprintf(fp, "encap ");
 611
 612                 if (RTA_PAYLOAD(tb[XFRMA_ENCAP]) < sizeof(*e)) {
 613                         fprintf(fp, "(ERROR truncated)");
 614                         fprintf(fp, "%s", _SL_);
 615                         return;
 616                 }
 617                 e = (struct xfrm_encap_tmpl *) RTA_DATA(tb[XFRMA_ENCAP]);
 618
 619                 fprintf(fp, "type ");
 620                 switch (e->encap_type) {
 621                 case 1:
 622                         fprintf(fp, "espinudp-nonike ");
 623                         break;
 624                 case 2:
 625                         fprintf(fp, "espinudp ");
 626                         break;
 627                 default:
 628                         fprintf(fp, "%u ", e->encap_type);
 629                         break;
 630                 }
 631                 fprintf(fp, "sport %u ", ntohs(e->encap_sport));
 632                 fprintf(fp, "dport %u ", ntohs(e->encap_dport));
 633
 634                 memset(abuf, '\0', sizeof(abuf));
 635                 fprintf(fp, "addr %s",
 636                         rt_addr_n2a(family, sizeof(e->encap_oa),
 637                                     &e->encap_oa, abuf, sizeof(abuf)));
 638                 fprintf(fp, "%s", _SL_);
 639         }
 640
 641         if (tb[XFRMA_TMPL]) {
 642                 struct rtattr *rta = tb[XFRMA_TMPL];
 643                 xfrm_tmpl_print((struct xfrm_user_tmpl *) RTA_DATA(rta),
 644                                 RTA_PAYLOAD(rta), family, fp, prefix);
 645         }
 646 }
 647
 648 static int xfrm_selector_iszero(struct xfrm_selector *s)
 649 {
 650         struct xfrm_selector s0;
 651
 652         memset(&s0, 0, sizeof(s0));
 653
 654         return (memcmp(&s0, s, sizeof(s0)) == 0);
 655 }
 656
 657 void xfrm_state_info_print(struct xfrm_usersa_info *xsinfo,
 658                             struct rtattr *tb[], FILE *fp, const char *prefix,
 659                             const char *title)
 660 {
 661         char buf[STRBUF_SIZE];
 662
 663         memset(buf, '\0', sizeof(buf));
 664
 665         xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
 666                            xsinfo->reqid, xsinfo->family, 1, fp, prefix,
 667                            title);
 668
 669         if (prefix)
 670                 STRBUF_CAT(buf, prefix);
 671         STRBUF_CAT(buf, "\t");
 672
 673         fprintf(fp, buf);
 674         fprintf(fp, "replay-window %u ", xsinfo->replay_window);
 675         if (show_stats > 0)
 676                 fprintf(fp, "seq 0x%08u ", xsinfo->seq);
 677         if (show_stats > 0 || xsinfo->flags) {
 678                 __u8 flags = xsinfo->flags;
 679
 680                 fprintf(fp, "flag ");
 681                 XFRM_FLAG_PRINT(fp, flags, XFRM_STATE_NOECN, "noecn");
 682                 XFRM_FLAG_PRINT(fp, flags, XFRM_STATE_DECAP_DSCP, "decap-dscp");
 683                 if (flags)
 684                         fprintf(fp, "%x", flags);
 685                 if (show_stats > 0)
 686                         fprintf(fp, " (0x%s)", strxf_mask8(flags));
 687         }
 688         fprintf(fp, "%s", _SL_);
 689
 690         xfrm_xfrma_print(tb, xsinfo->family, fp, buf);
 691
 692         if (!xfrm_selector_iszero(&xsinfo->sel)) {
 693                 char sbuf[STRBUF_SIZE];
 694
 695                 memcpy(sbuf, buf, sizeof(sbuf));
 696                 STRBUF_CAT(sbuf, "sel ");
 697
 698                 xfrm_selector_print(&xsinfo->sel, xsinfo->family, fp, sbuf);
 699         }
 700
 701         if (show_stats > 0) {
 702                 xfrm_lifetime_print(&xsinfo->lft, &xsinfo->curlft, fp, buf);
 703                 xfrm_stats_print(&xsinfo->stats, fp, buf);
 704         }
 705 }
 706
 707 void xfrm_policy_info_print(struct xfrm_userpolicy_info *xpinfo,
 708                             struct rtattr *tb[], FILE *fp, const char *prefix,
 709                             const char *title)
 710 {
 711         char buf[STRBUF_SIZE];
 712
 713         memset(buf, '\0', sizeof(buf));
 714
 715         xfrm_selector_print(&xpinfo->sel, preferred_family, fp, title);
 716
 717         if (prefix)
 718                 STRBUF_CAT(buf, prefix);
 719         STRBUF_CAT(buf, "\t");
 720
 721         fprintf(fp, buf);
 722         fprintf(fp, "dir ");
 723         switch (xpinfo->dir) {
 724         case XFRM_POLICY_IN:
 725                 fprintf(fp, "in");
 726                 break;
 727         case XFRM_POLICY_OUT:
 728                 fprintf(fp, "out");
 729                 break;
 730         case XFRM_POLICY_FWD:
 731                 fprintf(fp, "fwd");
 732                 break;
 733         default:
 734                 fprintf(fp, "%u", xpinfo->dir);
 735                 break;
 736         }
 737         fprintf(fp, " ");
 738
 739         switch (xpinfo->action) {
 740         case XFRM_POLICY_ALLOW:
 741                 if (show_stats > 0)
 742                         fprintf(fp, "action allow ");
 743                 break;
 744         case XFRM_POLICY_BLOCK:
 745                 fprintf(fp, "action block ");
 746                 break;
 747         default:
 748                 fprintf(fp, "action %u ", xpinfo->action);
 749                 break;
 750         }
 751
 752         if (show_stats)
 753                 fprintf(fp, "index %u ", xpinfo->index);
 754         fprintf(fp, "priority %u ", xpinfo->priority);
 755         if (show_stats > 0) {
 756                 fprintf(fp, "share %s ", strxf_share(xpinfo->share));
 757                 fprintf(fp, "flag 0x%s", strxf_mask8(xpinfo->flags));
 758         }
 759         fprintf(fp, "%s", _SL_);
 760
 761         if (show_stats > 0)
 762                 xfrm_lifetime_print(&xpinfo->lft, &xpinfo->curlft, fp, buf);
 763
 764         xfrm_xfrma_print(tb, xpinfo->sel.family, fp, buf);
 765 }
 766
 767 int xfrm_id_parse(xfrm_address_t *saddr, struct xfrm_id *id, __u16 *family,
 768                   int loose, int *argcp, char ***argvp)
 769 {
 770         int argc = *argcp;
 771         char **argv = *argvp;
 772         inet_prefix dst;
 773         inet_prefix src;
 774
 775         memset(&dst, 0, sizeof(dst));
 776         memset(&src, 0, sizeof(src));
 777
 778         while (1) {
 779                 if (strcmp(*argv, "src") == 0) {
 780                         NEXT_ARG();
 781
 782                         get_prefix(&src, *argv, preferred_family);
 783                         if (src.family == AF_UNSPEC)
 784                                 invarg("\"src\" address family is AF_UNSPEC", *argv);
 785                         if (family)
 786                                 *family = src.family;
 787
 788                         memcpy(saddr, &src.data, sizeof(*saddr));
 789
 790                         filter.id_src_mask = src.bitlen;
 791
 792                 } else if (strcmp(*argv, "dst") == 0) {
 793                         NEXT_ARG();
 794
 795                         get_prefix(&dst, *argv, preferred_family);
 796                         if (dst.family == AF_UNSPEC)
 797                                 invarg("\"dst\" address family is AF_UNSPEC", *argv);
 798                         if (family)
 799                                 *family = dst.family;
 800
 801                         memcpy(&id->daddr, &dst.data, sizeof(id->daddr));
 802
 803                         filter.id_dst_mask = dst.bitlen;
 804
 805                 } else if (strcmp(*argv, "proto") == 0) {
 806                         int ret;
 807
 808                         NEXT_ARG();
 809
 810                         ret = xfrm_xfrmproto_getbyname(*argv);
 811                         if (ret < 0)
 812                                 invarg("\"XFRM_PROTO\" is invalid", *argv);
 813
 814                         id->proto = (__u8)ret;
 815
 816                         filter.id_proto_mask = XFRM_FILTER_MASK_FULL;
 817
 818                 } else if (strcmp(*argv, "spi") == 0) {
 819                         __u32 spi;
 820
 821                         NEXT_ARG();
 822                         if (get_u32(&spi, *argv, 0))
 823                                 invarg("\"SPI\" is invalid", *argv);
 824
 825                         spi = htonl(spi);
 826                         id->spi = spi;
 827
 828                         filter.id_spi_mask = XFRM_FILTER_MASK_FULL;
 829
 830                 } else {
 831                         PREV_ARG(); /* back track */
 832                         break;
 833                 }
 834
 835                 if (!NEXT_ARG_OK())
 836                         break;
 837                 NEXT_ARG();
 838         }
 839
 840         if (src.family && dst.family && (src.family != dst.family))
 841                 invarg("the same address family is required between \"src\" and \"dst\"", *argv);
 842
 843         if (loose == 0 && id->proto == 0)
 844                 missarg("XFRM_PROTO");
 845         if (argc == *argcp)
 846                 missarg("ID");
 847
 848         *argcp = argc;
 849         *argvp = argv;
 850
 851         return 0;
 852 }
 853
 854 int xfrm_mode_parse(__u8 *mode, int *argcp, char ***argvp)
 855 {
 856         int argc = *argcp;
 857         char **argv = *argvp;
 858
 859         if (matches(*argv, "transport") == 0)
 860                 *mode = 0;
 861         else if (matches(*argv, "tunnel") == 0)
 862                 *mode = 1;
 863         else if (matches(*argv, "beet") == 0)
 864                 *mode = 4;
 865         else
 866                 invarg("\"MODE\" is invalid", *argv);
 867
 868         *argcp = argc;
 869         *argvp = argv;
 870
 871         return 0;
 872 }
 873
 874 int xfrm_encap_type_parse(__u16 *type, int *argcp, char ***argvp)
 875 {
 876         int argc = *argcp;
 877         char **argv = *argvp;
 878
 879         if (strcmp(*argv, "espinudp-nonike") == 0)
 880                 *type = 1;
 881         else if (strcmp(*argv, "espinudp") == 0)
 882                 *type = 2;
 883         else
 884                 invarg("\"ENCAP-TYPE\" is invalid", *argv);
 885
 886         *argcp = argc;
 887         *argvp = argv;
 888
 889         return 0;
 890 }
 891
 892 /* NOTE: reqid is used by host-byte order */
 893 int xfrm_reqid_parse(__u32 *reqid, int *argcp, char ***argvp)
 894 {
 895         int argc = *argcp;
 896         char **argv = *argvp;
 897
 898         if (get_u32(reqid, *argv, 0))
 899                 invarg("\"REQID\" is invalid", *argv);
 900
 901         *argcp = argc;
 902         *argvp = argv;
 903
 904         return 0;
 905 }
 906
 907 static int xfrm_selector_upspec_parse(struct xfrm_selector *sel,
 908                                       int *argcp, char ***argvp)
 909 {
 910         int argc = *argcp;
 911         char **argv = *argvp;
 912         char *sportp = NULL;
 913         char *dportp = NULL;
 914         char *typep = NULL;
 915         char *codep = NULL;
 916
 917         while (1) {
 918                 if (strcmp(*argv, "proto") == 0) {
 919                         __u8 upspec;
 920
 921                         NEXT_ARG();
 922
 923                         if (strcmp(*argv, "any") == 0)
 924                                 upspec = 0;
 925                         else {
 926                                 struct protoent *pp;
 927                                 pp = getprotobyname(*argv);
 928                                 if (pp)
 929                                         upspec = pp->p_proto;
 930                                 else {
 931                                         if (get_u8(&upspec, *argv, 0))
 932                                                 invarg("\"PROTO\" is invalid", *argv);
 933                                 }
 934                         }
 935                         sel->proto = upspec;
 936
 937                         filter.upspec_proto_mask = XFRM_FILTER_MASK_FULL;
 938
 939                 } else if (strcmp(*argv, "sport") == 0) {
 940                         sportp = *argv;
 941
 942                         NEXT_ARG();
 943
 944                         if (get_u16(&sel->sport, *argv, 0))
 945                                 invarg("\"PORT\" is invalid", *argv);
 946                         sel->sport = htons(sel->sport);
 947                         if (sel->sport)
 948                                 sel->sport_mask = ~((__u16)0);
 949
 950                         filter.upspec_sport_mask = XFRM_FILTER_MASK_FULL;
 951
 952                 } else if (strcmp(*argv, "dport") == 0) {
 953                         dportp = *argv;
 954
 955                         NEXT_ARG();
 956
 957                         if (get_u16(&sel->dport, *argv, 0))
 958                                 invarg("\"PORT\" is invalid", *argv);
 959                         sel->dport = htons(sel->dport);
 960                         if (sel->dport)
 961                                 sel->dport_mask = ~((__u16)0);
 962
 963                         filter.upspec_dport_mask = XFRM_FILTER_MASK_FULL;
 964
 965                 } else if (strcmp(*argv, "type") == 0) {
 966                         typep = *argv;
 967
 968                         NEXT_ARG();
 969
 970                         if (get_u16(&sel->sport, *argv, 0) ||
 971                             (sel->sport & ~((__u16)0xff)))
 972                                 invarg("\"type\" value is invalid", *argv);
 973                         sel->sport = htons(sel->sport);
 974                         sel->sport_mask = ~((__u16)0);
 975
 976                         filter.upspec_sport_mask = XFRM_FILTER_MASK_FULL;
 977
 978
 979                 } else if (strcmp(*argv, "code") == 0) {
 980                         codep = *argv;
 981
 982                         NEXT_ARG();
 983
 984                         if (get_u16(&sel->dport, *argv, 0) ||
 985                             (sel->dport & ~((__u16)0xff)))
 986                                 invarg("\"code\" value is invalid", *argv);
 987                         sel->dport = htons(sel->dport);
 988                         sel->dport_mask = ~((__u16)0);
 989
 990                         filter.upspec_dport_mask = XFRM_FILTER_MASK_FULL;
 991
 992                 } else {
 993                         PREV_ARG(); /* back track */
 994                         break;
 995                 }
 996
 997                 if (!NEXT_ARG_OK())
 998                         break;
 999                 NEXT_ARG();
1000         }
1001         if (argc == *argcp)
1002                 missarg("UPSPEC");
1003         if (sportp || dportp) {
1004                 switch (sel->proto) {
1005                 case IPPROTO_TCP:
1006                 case IPPROTO_UDP:
1007                 case IPPROTO_SCTP:
1008                 case IPPROTO_DCCP:
1009                         break;
1010                 default:
1011                         fprintf(stderr, "\"sport\" and \"dport\" are invalid with proto=%s\n", strxf_proto(sel->proto));
1012                         exit(1);
1013                 }
1014         }
1015         if (typep || codep) {
1016                 switch (sel->proto) {
1017                 case IPPROTO_ICMP:
1018                 case IPPROTO_ICMPV6:
1019                         break;
1020                 default:
1021                         fprintf(stderr, "\"type\" and \"code\" are invalid with proto=%s\n", strxf_proto(sel->proto));
1022                         exit(1);
1023                 }
1024         }
1025
1026         *argcp = argc;
1027         *argvp = argv;
1028
1029         return 0;
1030 }
1031
1032 int xfrm_selector_parse(struct xfrm_selector *sel, int *argcp, char ***argvp)
1033 {
1034         int argc = *argcp;
1035         char **argv = *argvp;
1036         inet_prefix dst;
1037         inet_prefix src;
1038         char *upspecp = NULL;
1039
1040         memset(&dst, 0, sizeof(dst));
1041         memset(&src, 0, sizeof(src));
1042
1043         while (1) {
1044                 if (strcmp(*argv, "src") == 0) {
1045                         NEXT_ARG();
1046
1047                         get_prefix(&src, *argv, preferred_family);
1048                         if (src.family == AF_UNSPEC)
1049                                 invarg("\"src\" address family is AF_UNSPEC", *argv);
1050                         sel->family = src.family;
1051
1052                         memcpy(&sel->saddr, &src.data, sizeof(sel->saddr));
1053                         sel->prefixlen_s = src.bitlen;
1054
1055                         filter.sel_src_mask = src.bitlen;
1056
1057                 } else if (strcmp(*argv, "dst") == 0) {
1058                         NEXT_ARG();
1059
1060                         get_prefix(&dst, *argv, preferred_family);
1061                         if (dst.family == AF_UNSPEC)
1062                                 invarg("\"dst\" address family is AF_UNSPEC", *argv);
1063                         sel->family = dst.family;
1064
1065                         memcpy(&sel->daddr, &dst.data, sizeof(sel->daddr));
1066                         sel->prefixlen_d = dst.bitlen;
1067
1068                         filter.sel_dst_mask = dst.bitlen;
1069
1070                 } else if (strcmp(*argv, "dev") == 0) {
1071                         int ifindex;
1072
1073                         NEXT_ARG();
1074
1075                         if (strcmp(*argv, "none") == 0)
1076                                 ifindex = 0;
1077                         else {
1078                                 ifindex = if_nametoindex(*argv);
1079                                 if (ifindex <= 0)
1080                                         invarg("\"DEV\" is invalid", *argv);
1081                         }
1082                         sel->ifindex = ifindex;
1083
1084                         filter.sel_dev_mask = XFRM_FILTER_MASK_FULL;
1085
1086                 } else {
1087                         if (upspecp) {
1088                                 PREV_ARG(); /* back track */
1089                                 break;
1090                         } else {
1091                                 upspecp = *argv;
1092                                 xfrm_selector_upspec_parse(sel, &argc, &argv);
1093                         }
1094                 }
1095
1096                 if (!NEXT_ARG_OK())
1097                         break;
1098
1099                 NEXT_ARG();
1100         }
1101
1102         if (src.family && dst.family && (src.family != dst.family))
1103                 invarg("the same address family is required between \"src\" and \"dst\"", *argv);
1104
1105         if (argc == *argcp)
1106                 missarg("SELECTOR");
1107
1108         *argcp = argc;
1109         *argvp = argv;
1110
1111         return 0;
1112 }
1113
1114 int xfrm_lifetime_cfg_parse(struct xfrm_lifetime_cfg *lft,
1115                             int *argcp, char ***argvp)
1116 {
1117         int argc = *argcp;
1118         char **argv = *argvp;
1119         int ret;
1120
1121         if (strcmp(*argv, "time-soft") == 0) {
1122                 NEXT_ARG();
1123                 ret = get_u64(&lft->soft_add_expires_seconds, *argv, 0);
1124                 if (ret)
1125                         invarg("\"time-soft\" value is invalid", *argv);
1126         } else if (strcmp(*argv, "time-hard") == 0) {
1127                 NEXT_ARG();
1128                 ret = get_u64(&lft->hard_add_expires_seconds, *argv, 0);
1129                 if (ret)
1130                         invarg("\"time-hard\" value is invalid", *argv);
1131         } else if (strcmp(*argv, "time-use-soft") == 0) {
1132                 NEXT_ARG();
1133                 ret = get_u64(&lft->soft_use_expires_seconds, *argv, 0);
1134                 if (ret)
1135                         invarg("\"time-use-soft\" value is invalid", *argv);
1136         } else if (strcmp(*argv, "time-use-hard") == 0) {
1137                 NEXT_ARG();
1138                 ret = get_u64(&lft->hard_use_expires_seconds, *argv, 0);
1139                 if (ret)
1140                         invarg("\"time-use-hard\" value is invalid", *argv);
1141         } else if (strcmp(*argv, "byte-soft") == 0) {
1142                 NEXT_ARG();
1143                 ret = get_u64(&lft->soft_byte_limit, *argv, 0);
1144                 if (ret)
1145                         invarg("\"byte-soft\" value is invalid", *argv);
1146         } else if (strcmp(*argv, "byte-hard") == 0) {
1147                 NEXT_ARG();
1148                 ret = get_u64(&lft->hard_byte_limit, *argv, 0);
1149                 if (ret)
1150                         invarg("\"byte-hard\" value is invalid", *argv);
1151         } else if (strcmp(*argv, "packet-soft") == 0) {
1152                 NEXT_ARG();
1153                 ret = get_u64(&lft->soft_packet_limit, *argv, 0);
1154                 if (ret)
1155                         invarg("\"packet-soft\" value is invalid", *argv);
1156         } else if (strcmp(*argv, "packet-hard") == 0) {
1157                 NEXT_ARG();
1158                 ret = get_u64(&lft->hard_packet_limit, *argv, 0);
1159                 if (ret)
1160                         invarg("\"packet-hard\" value is invalid", *argv);
1161         } else
1162                 invarg("\"LIMIT\" is invalid", *argv);
1163
1164         *argcp = argc;
1165         *argvp = argv;
1166
1167         return 0;
1168 }
1169
1170 int do_xfrm(int argc, char **argv)
1171 {
1172         memset(&filter, 0, sizeof(filter));
1173
1174         if (argc < 1)
1175                 usage();
1176
1177         if (matches(*argv, "state") == 0 ||
1178             matches(*argv, "sa") == 0)
1179                 return do_xfrm_state(argc-1, argv+1);
1180         else if (matches(*argv, "policy") == 0)
1181                 return do_xfrm_policy(argc-1, argv+1);
1182         else if (matches(*argv, "monitor") == 0)
1183                 return do_xfrm_monitor(argc-1, argv+1);
1184         else if (matches(*argv, "help") == 0) {
1185                 usage();
1186                 fprintf(stderr, "xfrm Object \"%s\" is unknown.\n", *argv);
1187                 exit(-1);
1188         }
1189         usage();
1190 }