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 /*      $DragonFly: src/usr.sbin/setkey/setkey.c,v 1.2 2003/06/17 04:30:03 dillon Exp $ */
   3 /*      $KAME: setkey.c,v 1.18 2001/05/08 04:36:39 itojun Exp $ */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/types.h>
  35 #include <sys/param.h>
  36 #include <sys/socket.h>
  37 #include <sys/time.h>
  38 #include <err.h>
  39 #include <net/route.h>
  40 #include <netinet/in.h>
  41 #include <net/pfkeyv2.h>
  42 #include <netkey/keydb.h>
  43 #include <netkey/key_debug.h>
  44 #include <netinet6/ipsec.h>
  45
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <limits.h>
  49 #include <string.h>
  50 #include <ctype.h>
  51 #include <unistd.h>
  52 #include <errno.h>
  53 #include <netdb.h>
  54
  55 #include "libpfkey.h"
  56
  57 void Usage __P((void));
  58 int main __P((int, char **));
  59 int get_supported __P((void));
  60 void sendkeyshort __P((u_int));
  61 void promisc __P((void));
  62 int sendkeymsg __P((void));
  63 int postproc __P((struct sadb_msg *, int));
  64 const char *numstr __P((int));
  65 void shortdump_hdr __P((void));
  66 void shortdump __P((struct sadb_msg *));
  67 static void printdate __P((void));
  68 static int32_t gmt2local __P((time_t));
  69
  70 #define MODE_SCRIPT     1
  71 #define MODE_CMDDUMP    2
  72 #define MODE_CMDFLUSH   3
  73 #define MODE_PROMISC    4
  74
  75 int so;
  76
  77 int f_forever = 0;
  78 int f_all = 0;
  79 int f_debug = 0;
  80 int f_verbose = 0;
  81 int f_mode = 0;
  82 int f_cmddump = 0;
  83 int f_policy = 0;
  84 int f_hexdump = 0;
  85 int f_tflag = 0;
  86 char *pname;
  87
  88 u_char m_buf[BUFSIZ];
  89 u_int m_len;
  90
  91 static time_t thiszone;
  92
  93 extern int lineno;
  94
  95 extern int parse __P((FILE **));
  96
  97 void
  98 Usage()
  99 {
 100         printf("Usage:\t%s [-dv] -c\n", pname);
 101         printf("\t%s [-dv] -f (file)\n", pname);
 102         printf("\t%s [-Padlv] -D\n", pname);
 103         printf("\t%s [-Pdv] -F\n", pname);
 104         printf("\t%s [-h] -x\n", pname);
 105         pfkey_close(so);
 106         exit(1);
 107 }
 108
 109 int
 110 main(ac, av)
 111         int ac;
 112         char **av;
 113 {
 114         FILE *fp = stdin;
 115         int c;
 116
 117         pname = *av;
 118
 119         if (ac == 1) Usage();
 120
 121         thiszone = gmt2local(0);
 122
 123         while ((c = getopt(ac, av, "acdf:hlvxDFP")) != -1) {
 124                 switch (c) {
 125                 case 'c':
 126                         f_mode = MODE_SCRIPT;
 127                         fp = stdin;
 128                         break;
 129                 case 'f':
 130                         f_mode = MODE_SCRIPT;
 131                         if ((fp = fopen(optarg, "r")) == NULL) {
 132                                 err(-1, "fopen");
 133                                 /*NOTREACHED*/
 134                         }
 135                         break;
 136                 case 'D':
 137                         f_mode = MODE_CMDDUMP;
 138                         break;
 139                 case 'F':
 140                         f_mode = MODE_CMDFLUSH;
 141                         break;
 142                 case 'a':
 143                         f_all = 1;
 144                         break;
 145                 case 'l':
 146                         f_forever = 1;
 147                         break;
 148                 case 'h':
 149                         f_hexdump = 1;
 150                         break;
 151                 case 'x':
 152                         f_mode = MODE_PROMISC;
 153                         f_tflag++;
 154                         break;
 155                 case 'P':
 156                         f_policy = 1;
 157                         break;
 158                 case 'd':
 159                         f_debug = 1;
 160                         break;
 161                 case 'v':
 162                         f_verbose = 1;
 163                         break;
 164                 default:
 165                         Usage();
 166                         /*NOTREACHED*/
 167                 }
 168         }
 169
 170         switch (f_mode) {
 171         case MODE_CMDDUMP:
 172                 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP);
 173                 break;
 174         case MODE_CMDFLUSH:
 175                 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH);
 176                 pfkey_close(so);
 177                 break;
 178         case MODE_SCRIPT:
 179                 if (get_supported() < 0) {
 180                         errx(-1, "%s", ipsec_strerror());
 181                         /*NOTREACHED*/
 182                 }
 183                 if (parse(&fp))
 184                         exit (1);
 185                 break;
 186         case MODE_PROMISC:
 187                 promisc();
 188                 /*NOTREACHED*/
 189         default:
 190                 Usage();
 191                 /*NOTREACHED*/
 192         }
 193
 194         exit(0);
 195 }
 196
 197 int
 198 get_supported()
 199 {
 200         int so;
 201
 202         if ((so = pfkey_open()) < 0) {
 203                 perror("pfkey_open");
 204                 return -1;
 205         }
 206
 207         /* debug mode ? */
 208         if (f_debug)
 209                 return 0;
 210
 211         if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
 212                 return -1;
 213
 214         if (pfkey_recv_register(so) < 0)
 215                 return -1;
 216
 217         return 0;
 218 }
 219
 220 void
 221 sendkeyshort(type)
 222         u_int type;
 223 {
 224         struct sadb_msg *m_msg = (struct sadb_msg *)m_buf;
 225
 226         m_len = sizeof(struct sadb_msg);
 227
 228         m_msg->sadb_msg_version = PF_KEY_V2;
 229         m_msg->sadb_msg_type = type;
 230         m_msg->sadb_msg_errno = 0;
 231         m_msg->sadb_msg_satype = SADB_SATYPE_UNSPEC;
 232         m_msg->sadb_msg_len = PFKEY_UNIT64(m_len);
 233         m_msg->sadb_msg_reserved = 0;
 234         m_msg->sadb_msg_seq = 0;
 235         m_msg->sadb_msg_pid = getpid();
 236
 237         sendkeymsg();
 238
 239         return;
 240 }
 241
 242 void
 243 promisc()
 244 {
 245         struct sadb_msg *m_msg = (struct sadb_msg *)m_buf;
 246         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 247         int so, len;
 248
 249         m_len = sizeof(struct sadb_msg);
 250
 251         m_msg->sadb_msg_version = PF_KEY_V2;
 252         m_msg->sadb_msg_type = SADB_X_PROMISC;
 253         m_msg->sadb_msg_errno = 0;
 254         m_msg->sadb_msg_satype = 1;
 255         m_msg->sadb_msg_len = PFKEY_UNIT64(m_len);
 256         m_msg->sadb_msg_reserved = 0;
 257         m_msg->sadb_msg_seq = 0;
 258         m_msg->sadb_msg_pid = getpid();
 259
 260         if ((so = socket(PF_KEY, SOCK_RAW, PF_KEY_V2)) < 0) {
 261                 err(1, "socket(PF_KEY)");
 262                 /*NOTREACHED*/
 263         }
 264
 265         if ((len = send(so, m_buf, m_len, 0)) < 0) {
 266                 err(1, "send");
 267                 /*NOTREACHED*/
 268         }
 269
 270         while (1) {
 271                 struct sadb_msg *base;
 272
 273                 if ((len = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
 274                         err(1, "recv");
 275                         /*NOTREACHED*/
 276                 }
 277
 278                 if (len != sizeof(*base))
 279                         continue;
 280
 281                 base = (struct sadb_msg *)rbuf;
 282                 if ((len = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
 283                                 0)) < 0) {
 284                         err(1, "recv");
 285                         /*NOTREACHED*/
 286                 }
 287                 printdate();
 288                 if (f_hexdump) {
 289                         int i;
 290                         for (i = 0; i < len; i++) {
 291                                 if (i % 16 == 0)
 292                                         printf("%08x: ", i);
 293                                 printf("%02x ", rbuf[i] & 0xff);
 294                                 if (i % 16 == 15)
 295                                         printf("\n");
 296                         }
 297                         if (len % 16)
 298                                 printf("\n");
 299                 }
 300                 /* adjust base pointer for promisc mode */
 301                 if (base->sadb_msg_type == SADB_X_PROMISC) {
 302                         if (sizeof(*base) < len)
 303                                 base++;
 304                         else
 305                                 base = NULL;
 306                 }
 307                 if (base) {
 308                         kdebug_sadb(base);
 309                         printf("\n");
 310                         fflush(stdout);
 311                 }
 312         }
 313 }
 314
 315 int
 316 sendkeymsg()
 317 {
 318         int so;
 319
 320         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 321         int len;
 322         struct sadb_msg *msg;
 323
 324         if ((so = pfkey_open()) < 0) {
 325                 perror("pfkey_open");
 326                 return -1;
 327         }
 328
 329     {
 330         struct timeval tv;
 331         tv.tv_sec = 1;
 332         tv.tv_usec = 0;
 333         if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
 334                 perror("setsockopt");
 335                 goto end;
 336         }
 337     }
 338
 339         if (f_forever)
 340                 shortdump_hdr();
 341 again:
 342         if (f_verbose) {
 343                 kdebug_sadb((struct sadb_msg *)m_buf);
 344                 printf("\n");
 345         }
 346
 347         if ((len = send(so, m_buf, m_len, 0)) < 0) {
 348                 perror("send");
 349                 goto end;
 350         }
 351
 352         msg = (struct sadb_msg *)rbuf;
 353         do {
 354                 if ((len = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
 355                         perror("recv");
 356                         goto end;
 357                 }
 358
 359                 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != len) {
 360                         warnx("invalid keymsg length");
 361                         break;
 362                 }
 363
 364                 if (f_verbose) {
 365                         kdebug_sadb((struct sadb_msg *)rbuf);
 366                         printf("\n");
 367                 }
 368                 if (postproc(msg, len) < 0)
 369                         break;
 370         } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
 371
 372         if (f_forever) {
 373                 fflush(stdout);
 374                 sleep(1);
 375                 goto again;
 376         }
 377
 378 end:
 379         pfkey_close(so);
 380         return(0);
 381 }
 382
 383 int
 384 postproc(msg, len)
 385         struct sadb_msg *msg;
 386         int len;
 387 {
 388
 389         if (msg->sadb_msg_errno != 0) {
 390                 char inf[80];
 391                 char *errmsg = NULL;
 392
 393                 if (f_mode == MODE_SCRIPT)
 394                         snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
 395                 else
 396                         inf[0] = '\0';
 397
 398                 switch (msg->sadb_msg_errno) {
 399                 case ENOENT:
 400                         switch (msg->sadb_msg_type) {
 401                         case SADB_DELETE:
 402                         case SADB_GET:
 403                         case SADB_X_SPDDELETE:
 404                                 errmsg = "No entry";
 405                                 break;
 406                         case SADB_DUMP:
 407                                 errmsg = "No SAD entries";
 408                                 break;
 409                         case SADB_X_SPDDUMP:
 410                                 errmsg = "No SPD entries";
 411                                 break;
 412                         }
 413                         break;
 414                 default:
 415                         errmsg = strerror(msg->sadb_msg_errno);
 416                 }
 417                 printf("%s%s.\n", inf, errmsg);
 418                 return(-1);
 419         }
 420
 421         switch (msg->sadb_msg_type) {
 422         case SADB_GET:
 423                 pfkey_sadump(msg);
 424                 break;
 425
 426         case SADB_DUMP:
 427                 /* filter out DEAD SAs */
 428                 if (!f_all) {
 429                         caddr_t mhp[SADB_EXT_MAX + 1];
 430                         struct sadb_sa *sa;
 431                         pfkey_align(msg, mhp);
 432                         pfkey_check(mhp);
 433                         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 434                                 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
 435                                         break;
 436                         }
 437                 }
 438                 if (f_forever)
 439                         shortdump(msg);
 440                 else
 441                         pfkey_sadump(msg);
 442                 msg = (struct sadb_msg *)((caddr_t)msg +
 443                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 444                 if (f_verbose) {
 445                         kdebug_sadb((struct sadb_msg *)msg);
 446                         printf("\n");
 447                 }
 448                 break;
 449
 450         case SADB_X_SPDDUMP:
 451                 pfkey_spdump(msg);
 452                 if (msg->sadb_msg_seq == 0) break;
 453                 msg = (struct sadb_msg *)((caddr_t)msg +
 454                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 455                 if (f_verbose) {
 456                         kdebug_sadb((struct sadb_msg *)msg);
 457                         printf("\n");
 458                 }
 459                 break;
 460         }
 461
 462         return(0);
 463 }
 464
 465 /*------------------------------------------------------------*/
 466 static char *satype[] = {
 467         NULL, NULL, "ah", "esp"
 468 };
 469 static char *sastate[] = {
 470         "L", "M", "D", "d"
 471 };
 472 static char *ipproto[] = {
 473 /*0*/   "ip", "icmp", "igmp", "ggp", "ip4",
 474         NULL, "tcp", NULL, "egp", NULL,
 475 /*10*/  NULL, NULL, NULL, NULL, NULL,
 476         NULL, NULL, "udp", NULL, NULL,
 477 /*20*/  NULL, NULL, "idp", NULL, NULL,
 478         NULL, NULL, NULL, NULL, "tp",
 479 /*30*/  NULL, NULL, NULL, NULL, NULL,
 480         NULL, NULL, NULL, NULL, NULL,
 481 /*40*/  NULL, "ip6", NULL, "rt6", "frag6",
 482         NULL, "rsvp", "gre", NULL, NULL,
 483 /*50*/  "esp", "ah", NULL, NULL, NULL,
 484         NULL, NULL, NULL, "icmp6", "none",
 485 /*60*/  "dst6",
 486 };
 487
 488 #define STR_OR_ID(x, tab) \
 489         (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
 490
 491 const char *
 492 numstr(x)
 493         int x;
 494 {
 495         static char buf[20];
 496         snprintf(buf, sizeof(buf), "#%d", x);
 497         return buf;
 498 }
 499
 500 void
 501 shortdump_hdr()
 502 {
 503         printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
 504                 "time", "p", "s", "spi", "ltime", "src", "dst");
 505 }
 506
 507 void
 508 shortdump(msg)
 509         struct sadb_msg *msg;
 510 {
 511         caddr_t mhp[SADB_EXT_MAX + 1];
 512         char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
 513         struct sadb_sa *sa;
 514         struct sadb_address *saddr;
 515         struct sadb_lifetime *lts, *lth, *ltc;
 516         struct sockaddr *s;
 517         u_int t;
 518         time_t cur = time(0);
 519
 520         pfkey_align(msg, mhp);
 521         pfkey_check(mhp);
 522
 523         printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
 524
 525         printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
 526
 527         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 528                 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
 529                 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
 530         } else
 531                 printf("%-1s %-8s", "?", "?");
 532
 533         lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
 534         lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
 535         ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
 536         if (lts && lth && ltc) {
 537                 if (ltc->sadb_lifetime_addtime == 0)
 538                         t = (u_long)0;
 539                 else
 540                         t = (u_long)(cur - ltc->sadb_lifetime_addtime);
 541                 if (t >= 1000)
 542                         strcpy(buf, " big/");
 543                 else
 544                         snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
 545                 printf("%s", buf);
 546
 547                 t = (u_long)lth->sadb_lifetime_addtime;
 548                 if (t >= 1000)
 549                         strcpy(buf, "big");
 550                 else
 551                         snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
 552                 printf("%s", buf);
 553         } else
 554                 printf(" ??\?/???");    /* backslash to avoid trigraph ??/ */
 555
 556         printf(" ");
 557
 558         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
 559                 if (saddr->sadb_address_proto)
 560                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 561                 s = (struct sockaddr *)(saddr + 1);
 562                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 563                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 564                 if (strcmp(pbuf, "0") != 0)
 565                         printf("%s[%s]", buf, pbuf);
 566                 else
 567                         printf("%s", buf);
 568         } else
 569                 printf("?");
 570
 571         printf(" -> ");
 572
 573         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
 574                 if (saddr->sadb_address_proto)
 575                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 576
 577                 s = (struct sockaddr *)(saddr + 1);
 578                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 579                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 580                 if (strcmp(pbuf, "0") != 0)
 581                         printf("%s[%s]", buf, pbuf);
 582                 else
 583                         printf("%s", buf);
 584         } else
 585                 printf("?");
 586
 587         printf("\n");
 588 }
 589
 590 /* From: tcpdump(1):gmt2local.c and util.c */
 591 /*
 592  * Print the timestamp
 593  */
 594 static void
 595 printdate()
 596 {
 597         struct timeval tp;
 598         int s;
 599
 600         if (gettimeofday(&tp, NULL) == -1) {
 601                 perror("gettimeofday");
 602                 return;
 603         }
 604
 605         if (f_tflag == 1) {
 606                 /* Default */
 607                 s = (tp.tv_sec + thiszone ) % 86400;
 608                 (void)printf("%02d:%02d:%02d.%06u ",
 609                     s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
 610         } else if (f_tflag > 1) {
 611                 /* Unix timeval style */
 612                 (void)printf("%u.%06u ",
 613                     (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
 614         }
 615
 616         printf("\n");
 617 }
 618
 619 /*
 620  * Returns the difference between gmt and local time in seconds.
 621  * Use gmtime() and localtime() to keep things simple.
 622  */
 623 int32_t
 624 gmt2local(time_t t)
 625 {
 626         register int dt, dir;
 627         register struct tm *gmt, *loc;
 628         struct tm sgmt;
 629
 630         if (t == 0)
 631                 t = time(NULL);
 632         gmt = &sgmt;
 633         *gmt = *gmtime(&t);
 634         loc = localtime(&t);
 635         dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
 636             (loc->tm_min - gmt->tm_min) * 60;
 637
 638         /*
 639          * If the year or julian day is different, we span 00:00 GMT
 640          * and must add or subtract a day. Check the year first to
 641          * avoid problems when the julian day wraps.
 642          */
 643         dir = loc->tm_year - gmt->tm_year;
 644         if (dir == 0)
 645                 dir = loc->tm_yday - gmt->tm_yday;
 646         dt += dir * 24 * 60 * 60;
 647
 648         return (dt);
 649 }