usr.sbin/setkey/setkey.c

   1 /*      $FreeBSD: src/usr.sbin/setkey/setkey.c,v 1.1.2.3 2003/04/26 23:53:54 sumikawa Exp $     */
   2 /*      $KAME: setkey.c,v 1.18 2001/05/08 04:36:39 itojun Exp $ */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/param.h>
  35 #include <sys/socket.h>
  36 #include <sys/time.h>
  37 #include <err.h>
  38 #include <net/route.h>
  39 #include <netinet/in.h>
  40 #include <net/pfkeyv2.h>
  41 #include <netkey/keydb.h>
  42 #include <netkey/key_debug.h>
  43 #include <netinet6/ipsec.h>
  44
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <limits.h>
  48 #include <string.h>
  49 #include <ctype.h>
  50 #include <unistd.h>
  51 #include <errno.h>
  52 #include <netdb.h>
  53
  54 #include "libpfkey.h"
  55
  56 void Usage __P((void));
  57 int main __P((int, char **));
  58 int get_supported __P((void));
  59 void sendkeyshort __P((u_int));
  60 void promisc __P((void));
  61 int sendkeymsg __P((void));
  62 int postproc __P((struct sadb_msg *, int));
  63 const char *numstr __P((int));
  64 void shortdump_hdr __P((void));
  65 void shortdump __P((struct sadb_msg *));
  66 static void printdate __P((void));
  67 static int32_t gmt2local __P((time_t));
  68
  69 #define MODE_SCRIPT     1
  70 #define MODE_CMDDUMP    2
  71 #define MODE_CMDFLUSH   3
  72 #define MODE_PROMISC    4
  73
  74 int so;
  75
  76 int f_forever = 0;
  77 int f_all = 0;
  78 int f_debug = 0;
  79 int f_verbose = 0;
  80 int f_mode = 0;
  81 int f_cmddump = 0;
  82 int f_policy = 0;
  83 int f_hexdump = 0;
  84 int f_tflag = 0;
  85 char *pname;
  86
  87 u_char m_buf[BUFSIZ];
  88 u_int m_len;
  89
  90 static time_t thiszone;
  91
  92 extern int lineno;
  93
  94 extern int parse __P((FILE **));
  95
  96 void
  97 Usage()
  98 {
  99         printf("Usage:\t%s [-dv] -c\n", pname);
 100         printf("\t%s [-dv] -f (file)\n", pname);
 101         printf("\t%s [-Padlv] -D\n", pname);
 102         printf("\t%s [-Pdv] -F\n", pname);
 103         printf("\t%s [-h] -x\n", pname);
 104         pfkey_close(so);
 105         exit(1);
 106 }
 107
 108 int
 109 main(ac, av)
 110         int ac;
 111         char **av;
 112 {
 113         FILE *fp = stdin;
 114         int c;
 115
 116         pname = *av;
 117
 118         if (ac == 1) Usage();
 119
 120         thiszone = gmt2local(0);
 121
 122         while ((c = getopt(ac, av, "acdf:hlvxDFP")) != -1) {
 123                 switch (c) {
 124                 case 'c':
 125                         f_mode = MODE_SCRIPT;
 126                         fp = stdin;
 127                         break;
 128                 case 'f':
 129                         f_mode = MODE_SCRIPT;
 130                         if ((fp = fopen(optarg, "r")) == NULL) {
 131                                 err(-1, "fopen");
 132                                 /*NOTREACHED*/
 133                         }
 134                         break;
 135                 case 'D':
 136                         f_mode = MODE_CMDDUMP;
 137                         break;
 138                 case 'F':
 139                         f_mode = MODE_CMDFLUSH;
 140                         break;
 141                 case 'a':
 142                         f_all = 1;
 143                         break;
 144                 case 'l':
 145                         f_forever = 1;
 146                         break;
 147                 case 'h':
 148                         f_hexdump = 1;
 149                         break;
 150                 case 'x':
 151                         f_mode = MODE_PROMISC;
 152                         f_tflag++;
 153                         break;
 154                 case 'P':
 155                         f_policy = 1;
 156                         break;
 157                 case 'd':
 158                         f_debug = 1;
 159                         break;
 160                 case 'v':
 161                         f_verbose = 1;
 162                         break;
 163                 default:
 164                         Usage();
 165                         /*NOTREACHED*/
 166                 }
 167         }
 168
 169         switch (f_mode) {
 170         case MODE_CMDDUMP:
 171                 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP);
 172                 break;
 173         case MODE_CMDFLUSH:
 174                 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH);
 175                 pfkey_close(so);
 176                 break;
 177         case MODE_SCRIPT:
 178                 if (get_supported() < 0) {
 179                         errx(-1, "%s", ipsec_strerror());
 180                         /*NOTREACHED*/
 181                 }
 182                 if (parse(&fp))
 183                         exit (1);
 184                 break;
 185         case MODE_PROMISC:
 186                 promisc();
 187                 /*NOTREACHED*/
 188         default:
 189                 Usage();
 190                 /*NOTREACHED*/
 191         }
 192
 193         exit(0);
 194 }
 195
 196 int
 197 get_supported()
 198 {
 199         int so;
 200
 201         if ((so = pfkey_open()) < 0) {
 202                 perror("pfkey_open");
 203                 return -1;
 204         }
 205
 206         /* debug mode ? */
 207         if (f_debug)
 208                 return 0;
 209
 210         if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
 211                 return -1;
 212
 213         if (pfkey_recv_register(so) < 0)
 214                 return -1;
 215
 216         return 0;
 217 }
 218
 219 void
 220 sendkeyshort(type)
 221         u_int type;
 222 {
 223         struct sadb_msg *m_msg = (struct sadb_msg *)m_buf;
 224
 225         m_len = sizeof(struct sadb_msg);
 226
 227         m_msg->sadb_msg_version = PF_KEY_V2;
 228         m_msg->sadb_msg_type = type;
 229         m_msg->sadb_msg_errno = 0;
 230         m_msg->sadb_msg_satype = SADB_SATYPE_UNSPEC;
 231         m_msg->sadb_msg_len = PFKEY_UNIT64(m_len);
 232         m_msg->sadb_msg_reserved = 0;
 233         m_msg->sadb_msg_seq = 0;
 234         m_msg->sadb_msg_pid = getpid();
 235
 236         sendkeymsg();
 237
 238         return;
 239 }
 240
 241 void
 242 promisc()
 243 {
 244         struct sadb_msg *m_msg = (struct sadb_msg *)m_buf;
 245         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 246         int so, len;
 247
 248         m_len = sizeof(struct sadb_msg);
 249
 250         m_msg->sadb_msg_version = PF_KEY_V2;
 251         m_msg->sadb_msg_type = SADB_X_PROMISC;
 252         m_msg->sadb_msg_errno = 0;
 253         m_msg->sadb_msg_satype = 1;
 254         m_msg->sadb_msg_len = PFKEY_UNIT64(m_len);
 255         m_msg->sadb_msg_reserved = 0;
 256         m_msg->sadb_msg_seq = 0;
 257         m_msg->sadb_msg_pid = getpid();
 258
 259         if ((so = socket(PF_KEY, SOCK_RAW, PF_KEY_V2)) < 0) {
 260                 err(1, "socket(PF_KEY)");
 261                 /*NOTREACHED*/
 262         }
 263
 264         if ((len = send(so, m_buf, m_len, 0)) < 0) {
 265                 err(1, "send");
 266                 /*NOTREACHED*/
 267         }
 268
 269         while (1) {
 270                 struct sadb_msg *base;
 271
 272                 if ((len = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
 273                         err(1, "recv");
 274                         /*NOTREACHED*/
 275                 }
 276
 277                 if (len != sizeof(*base))
 278                         continue;
 279
 280                 base = (struct sadb_msg *)rbuf;
 281                 if ((len = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
 282                                 0)) < 0) {
 283                         err(1, "recv");
 284                         /*NOTREACHED*/
 285                 }
 286                 printdate();
 287                 if (f_hexdump) {
 288                         int i;
 289                         for (i = 0; i < len; i++) {
 290                                 if (i % 16 == 0)
 291                                         printf("%08x: ", i);
 292                                 printf("%02x ", rbuf[i] & 0xff);
 293                                 if (i % 16 == 15)
 294                                         printf("\n");
 295                         }
 296                         if (len % 16)
 297                                 printf("\n");
 298                 }
 299                 /* adjust base pointer for promisc mode */
 300                 if (base->sadb_msg_type == SADB_X_PROMISC) {
 301                         if (sizeof(*base) < len)
 302                                 base++;
 303                         else
 304                                 base = NULL;
 305                 }
 306                 if (base) {
 307                         kdebug_sadb(base);
 308                         printf("\n");
 309                         fflush(stdout);
 310                 }
 311         }
 312 }
 313
 314 int
 315 sendkeymsg()
 316 {
 317         int so;
 318
 319         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 320         int len;
 321         struct sadb_msg *msg;
 322
 323         if ((so = pfkey_open()) < 0) {
 324                 perror("pfkey_open");
 325                 return -1;
 326         }
 327
 328     {
 329         struct timeval tv;
 330         tv.tv_sec = 1;
 331         tv.tv_usec = 0;
 332         if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
 333                 perror("setsockopt");
 334                 goto end;
 335         }
 336     }
 337
 338         if (f_forever)
 339                 shortdump_hdr();
 340 again:
 341         if (f_verbose) {
 342                 kdebug_sadb((struct sadb_msg *)m_buf);
 343                 printf("\n");
 344         }
 345
 346         if ((len = send(so, m_buf, m_len, 0)) < 0) {
 347                 perror("send");
 348                 goto end;
 349         }
 350
 351         msg = (struct sadb_msg *)rbuf;
 352         do {
 353                 if ((len = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
 354                         perror("recv");
 355                         goto end;
 356                 }
 357
 358                 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != len) {
 359                         warnx("invalid keymsg length");
 360                         break;
 361                 }
 362
 363                 if (f_verbose) {
 364                         kdebug_sadb((struct sadb_msg *)rbuf);
 365                         printf("\n");
 366                 }
 367                 if (postproc(msg, len) < 0)
 368                         break;
 369         } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
 370
 371         if (f_forever) {
 372                 fflush(stdout);
 373                 sleep(1);
 374                 goto again;
 375         }
 376
 377 end:
 378         pfkey_close(so);
 379         return(0);
 380 }
 381
 382 int
 383 postproc(msg, len)
 384         struct sadb_msg *msg;
 385         int len;
 386 {
 387
 388         if (msg->sadb_msg_errno != 0) {
 389                 char inf[80];
 390                 char *errmsg = NULL;
 391
 392                 if (f_mode == MODE_SCRIPT)
 393                         snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
 394                 else
 395                         inf[0] = '\0';
 396
 397                 switch (msg->sadb_msg_errno) {
 398                 case ENOENT:
 399                         switch (msg->sadb_msg_type) {
 400                         case SADB_DELETE:
 401                         case SADB_GET:
 402                         case SADB_X_SPDDELETE:
 403                                 errmsg = "No entry";
 404                                 break;
 405                         case SADB_DUMP:
 406                                 errmsg = "No SAD entries";
 407                                 break;
 408                         case SADB_X_SPDDUMP:
 409                                 errmsg = "No SPD entries";
 410                                 break;
 411                         }
 412                         break;
 413                 default:
 414                         errmsg = strerror(msg->sadb_msg_errno);
 415                 }
 416                 printf("%s%s.\n", inf, errmsg);
 417                 return(-1);
 418         }
 419
 420         switch (msg->sadb_msg_type) {
 421         case SADB_GET:
 422                 pfkey_sadump(msg);
 423                 break;
 424
 425         case SADB_DUMP:
 426                 /* filter out DEAD SAs */
 427                 if (!f_all) {
 428                         caddr_t mhp[SADB_EXT_MAX + 1];
 429                         struct sadb_sa *sa;
 430                         pfkey_align(msg, mhp);
 431                         pfkey_check(mhp);
 432                         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 433                                 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
 434                                         break;
 435                         }
 436                 }
 437                 if (f_forever)
 438                         shortdump(msg);
 439                 else
 440                         pfkey_sadump(msg);
 441                 msg = (struct sadb_msg *)((caddr_t)msg +
 442                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 443                 if (f_verbose) {
 444                         kdebug_sadb((struct sadb_msg *)msg);
 445                         printf("\n");
 446                 }
 447                 break;
 448
 449         case SADB_X_SPDDUMP:
 450                 pfkey_spdump(msg);
 451                 if (msg->sadb_msg_seq == 0) break;
 452                 msg = (struct sadb_msg *)((caddr_t)msg +
 453                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 454                 if (f_verbose) {
 455                         kdebug_sadb((struct sadb_msg *)msg);
 456                         printf("\n");
 457                 }
 458                 break;
 459         }
 460
 461         return(0);
 462 }
 463
 464 /*------------------------------------------------------------*/
 465 static char *satype[] = {
 466         NULL, NULL, "ah", "esp"
 467 };
 468 static char *sastate[] = {
 469         "L", "M", "D", "d"
 470 };
 471 static char *ipproto[] = {
 472 /*0*/   "ip", "icmp", "igmp", "ggp", "ip4",
 473         NULL, "tcp", NULL, "egp", NULL,
 474 /*10*/  NULL, NULL, NULL, NULL, NULL,
 475         NULL, NULL, "udp", NULL, NULL,
 476 /*20*/  NULL, NULL, "idp", NULL, NULL,
 477         NULL, NULL, NULL, NULL, "tp",
 478 /*30*/  NULL, NULL, NULL, NULL, NULL,
 479         NULL, NULL, NULL, NULL, NULL,
 480 /*40*/  NULL, "ip6", NULL, "rt6", "frag6",
 481         NULL, "rsvp", "gre", NULL, NULL,
 482 /*50*/  "esp", "ah", NULL, NULL, NULL,
 483         NULL, NULL, NULL, "icmp6", "none",
 484 /*60*/  "dst6",
 485 };
 486
 487 #define STR_OR_ID(x, tab) \
 488         (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
 489
 490 const char *
 491 numstr(x)
 492         int x;
 493 {
 494         static char buf[20];
 495         snprintf(buf, sizeof(buf), "#%d", x);
 496         return buf;
 497 }
 498
 499 void
 500 shortdump_hdr()
 501 {
 502         printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
 503                 "time", "p", "s", "spi", "ltime", "src", "dst");
 504 }
 505
 506 void
 507 shortdump(msg)
 508         struct sadb_msg *msg;
 509 {
 510         caddr_t mhp[SADB_EXT_MAX + 1];
 511         char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
 512         struct sadb_sa *sa;
 513         struct sadb_address *saddr;
 514         struct sadb_lifetime *lts, *lth, *ltc;
 515         struct sockaddr *s;
 516         u_int t;
 517         time_t cur = time(0);
 518
 519         pfkey_align(msg, mhp);
 520         pfkey_check(mhp);
 521
 522         printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
 523
 524         printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
 525
 526         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 527                 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
 528                 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
 529         } else
 530                 printf("%-1s %-8s", "?", "?");
 531
 532         lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
 533         lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
 534         ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
 535         if (lts && lth && ltc) {
 536                 if (ltc->sadb_lifetime_addtime == 0)
 537                         t = (u_long)0;
 538                 else
 539                         t = (u_long)(cur - ltc->sadb_lifetime_addtime);
 540                 if (t >= 1000)
 541                         strcpy(buf, " big/");
 542                 else
 543                         snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
 544                 printf("%s", buf);
 545
 546                 t = (u_long)lth->sadb_lifetime_addtime;
 547                 if (t >= 1000)
 548                         strcpy(buf, "big");
 549                 else
 550                         snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
 551                 printf("%s", buf);
 552         } else
 553                 printf(" ??\?/???");    /* backslash to avoid trigraph ??/ */
 554
 555         printf(" ");
 556
 557         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
 558                 if (saddr->sadb_address_proto)
 559                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 560                 s = (struct sockaddr *)(saddr + 1);
 561                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 562                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 563                 if (strcmp(pbuf, "0") != 0)
 564                         printf("%s[%s]", buf, pbuf);
 565                 else
 566                         printf("%s", buf);
 567         } else
 568                 printf("?");
 569
 570         printf(" -> ");
 571
 572         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
 573                 if (saddr->sadb_address_proto)
 574                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 575
 576                 s = (struct sockaddr *)(saddr + 1);
 577                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 578                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 579                 if (strcmp(pbuf, "0") != 0)
 580                         printf("%s[%s]", buf, pbuf);
 581                 else
 582                         printf("%s", buf);
 583         } else
 584                 printf("?");
 585
 586         printf("\n");
 587 }
 588
 589 /* From: tcpdump(1):gmt2local.c and util.c */
 590 /*
 591  * Print the timestamp
 592  */
 593 static void
 594 printdate()
 595 {
 596         struct timeval tp;
 597         int s;
 598
 599         if (gettimeofday(&tp, NULL) == -1) {
 600                 perror("gettimeofday");
 601                 return;
 602         }
 603
 604         if (f_tflag == 1) {
 605                 /* Default */
 606                 s = (tp.tv_sec + thiszone ) % 86400;
 607                 (void)printf("%02d:%02d:%02d.%06u ",
 608                     s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
 609         } else if (f_tflag > 1) {
 610                 /* Unix timeval style */
 611                 (void)printf("%u.%06u ",
 612                     (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
 613         }
 614
 615         printf("\n");
 616 }
 617
 618 /*
 619  * Returns the difference between gmt and local time in seconds.
 620  * Use gmtime() and localtime() to keep things simple.
 621  */
 622 int32_t
 623 gmt2local(time_t t)
 624 {
 625         register int dt, dir;
 626         register struct tm *gmt, *loc;
 627         struct tm sgmt;
 628
 629         if (t == 0)
 630                 t = time(NULL);
 631         gmt = &sgmt;
 632         *gmt = *gmtime(&t);
 633         loc = localtime(&t);
 634         dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
 635             (loc->tm_min - gmt->tm_min) * 60;
 636
 637         /*
 638          * If the year or julian day is different, we span 00:00 GMT
 639          * and must add or subtract a day. Check the year first to
 640          * avoid problems when the julian day wraps.
 641          */
 642         dir = loc->tm_year - gmt->tm_year;
 643         if (dir == 0)
 644                 dir = loc->tm_yday - gmt->tm_yday;
 645         dt += dir * 24 * 60 * 60;
 646
 647         return (dt);
 648 }