sbin/setkey/setkey.c

   1 /*      $FreeBSD$       */
   2 /*      $KAME: setkey.c,v 1.28 2003/06/27 07:15:45 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 <netipsec/keydb.h>
  42 #include <netipsec/key_debug.h>
  43 #include <netipsec/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(void);
  57 int main(int, char **);
  58 int get_supported(void);
  59 void sendkeyshort(u_int);
  60 void promisc(void);
  61 int sendkeymsg(char *, size_t);
  62 int postproc(struct sadb_msg *, int);
  63 const char *numstr(int);
  64 void shortdump_hdr(void);
  65 void shortdump(struct sadb_msg *);
  66 static void printdate(void);
  67 static int32_t gmt2local(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_verbose = 0;
  79 int f_mode = 0;
  80 int f_cmddump = 0;
  81 int f_policy = 0;
  82 int f_hexdump = 0;
  83 int f_tflag = 0;
  84 static time_t thiszone;
  85
  86 extern int lineno;
  87
  88 extern int parse(FILE **);
  89
  90 void
  91 usage()
  92 {
  93
  94         printf("usage: setkey [-v] -c\n");
  95         printf("       setkey [-v] -f filename\n");
  96         printf("       setkey [-Palv] -D\n");
  97         printf("       setkey [-Pv] -F\n");
  98         printf("       setkey [-h] -x\n");
  99         exit(1);
 100 }
 101
 102 int
 103 main(ac, av)
 104         int ac;
 105         char **av;
 106 {
 107         FILE *fp = stdin;
 108         int c;
 109
 110         if (ac == 1) {
 111                 usage();
 112                 /* NOTREACHED */
 113         }
 114
 115         thiszone = gmt2local(0);
 116
 117         while ((c = getopt(ac, av, "acdf:hlvxDFP")) != -1) {
 118                 switch (c) {
 119                 case 'c':
 120                         f_mode = MODE_SCRIPT;
 121                         fp = stdin;
 122                         break;
 123                 case 'f':
 124                         f_mode = MODE_SCRIPT;
 125                         if ((fp = fopen(optarg, "r")) == NULL) {
 126                                 err(-1, "fopen");
 127                                 /*NOTREACHED*/
 128                         }
 129                         break;
 130                 case 'D':
 131                         f_mode = MODE_CMDDUMP;
 132                         break;
 133                 case 'F':
 134                         f_mode = MODE_CMDFLUSH;
 135                         break;
 136                 case 'a':
 137                         f_all = 1;
 138                         break;
 139                 case 'l':
 140                         f_forever = 1;
 141                         break;
 142                 case 'h':
 143                         f_hexdump = 1;
 144                         break;
 145                 case 'x':
 146                         f_mode = MODE_PROMISC;
 147                         f_tflag++;
 148                         break;
 149                 case 'P':
 150                         f_policy = 1;
 151                         break;
 152                 case 'v':
 153                         f_verbose = 1;
 154                         break;
 155                 default:
 156                         usage();
 157                         /*NOTREACHED*/
 158                 }
 159         }
 160
 161         so = pfkey_open();
 162         if (so < 0) {
 163                 perror("pfkey_open");
 164                 exit(1);
 165         }
 166
 167         switch (f_mode) {
 168         case MODE_CMDDUMP:
 169                 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP);
 170                 break;
 171         case MODE_CMDFLUSH:
 172                 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH);
 173                 break;
 174         case MODE_SCRIPT:
 175                 if (get_supported() < 0) {
 176                         errx(-1, "%s", ipsec_strerror());
 177                         /*NOTREACHED*/
 178                 }
 179                 if (parse(&fp))
 180                         exit (1);
 181                 break;
 182         case MODE_PROMISC:
 183                 promisc();
 184                 /*NOTREACHED*/
 185         default:
 186                 usage();
 187                 /*NOTREACHED*/
 188         }
 189
 190         exit(0);
 191 }
 192
 193 int
 194 get_supported()
 195 {
 196
 197         if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
 198                 return -1;
 199
 200         if (pfkey_recv_register(so) < 0)
 201                 return -1;
 202
 203         return 0;
 204 }
 205
 206 void
 207 sendkeyshort(type)
 208         u_int type;
 209 {
 210         struct sadb_msg msg;
 211
 212         msg.sadb_msg_version = PF_KEY_V2;
 213         msg.sadb_msg_type = type;
 214         msg.sadb_msg_errno = 0;
 215         msg.sadb_msg_satype = SADB_SATYPE_UNSPEC;
 216         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 217         msg.sadb_msg_reserved = 0;
 218         msg.sadb_msg_seq = 0;
 219         msg.sadb_msg_pid = getpid();
 220
 221         sendkeymsg((char *)&msg, sizeof(msg));
 222
 223         return;
 224 }
 225
 226 void
 227 promisc()
 228 {
 229         struct sadb_msg msg;
 230         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 231         ssize_t l;
 232
 233         msg.sadb_msg_version = PF_KEY_V2;
 234         msg.sadb_msg_type = SADB_X_PROMISC;
 235         msg.sadb_msg_errno = 0;
 236         msg.sadb_msg_satype = 1;
 237         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 238         msg.sadb_msg_reserved = 0;
 239         msg.sadb_msg_seq = 0;
 240         msg.sadb_msg_pid = getpid();
 241
 242         if ((l = send(so, &msg, sizeof(msg), 0)) < 0) {
 243                 err(1, "send");
 244                 /*NOTREACHED*/
 245         }
 246
 247         while (1) {
 248                 struct sadb_msg *base;
 249
 250                 if ((l = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
 251                         err(1, "recv");
 252                         /*NOTREACHED*/
 253                 }
 254
 255                 if (l != sizeof(*base))
 256                         continue;
 257
 258                 base = (struct sadb_msg *)rbuf;
 259                 if ((l = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
 260                                 0)) < 0) {
 261                         err(1, "recv");
 262                         /*NOTREACHED*/
 263                 }
 264                 printdate();
 265                 if (f_hexdump) {
 266                         int i;
 267                         for (i = 0; i < l; i++) {
 268                                 if (i % 16 == 0)
 269                                         printf("%08x: ", i);
 270                                 printf("%02x ", rbuf[i] & 0xff);
 271                                 if (i % 16 == 15)
 272                                         printf("\n");
 273                         }
 274                         if (l % 16)
 275                                 printf("\n");
 276                 }
 277                 /* adjust base pointer for promisc mode */
 278                 if (base->sadb_msg_type == SADB_X_PROMISC) {
 279                         if ((ssize_t)sizeof(*base) < l)
 280                                 base++;
 281                         else
 282                                 base = NULL;
 283                 }
 284                 if (base) {
 285                         kdebug_sadb(base);
 286                         printf("\n");
 287                         fflush(stdout);
 288                 }
 289         }
 290 }
 291
 292 int
 293 sendkeymsg(buf, len)
 294         char *buf;
 295         size_t len;
 296 {
 297         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 298         ssize_t l;
 299         struct sadb_msg *msg;
 300
 301     {
 302         struct timeval tv;
 303         tv.tv_sec = 1;
 304         tv.tv_usec = 0;
 305         if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
 306                 perror("setsockopt");
 307                 goto end;
 308         }
 309     }
 310
 311         if (f_forever)
 312                 shortdump_hdr();
 313 again:
 314         if (f_verbose) {
 315                 kdebug_sadb((struct sadb_msg *)buf);
 316                 printf("\n");
 317         }
 318         if (f_hexdump) {
 319                 int i;
 320                 for (i = 0; i < len; i++) {
 321                         if (i % 16 == 0)
 322                                 printf("%08x: ", i);
 323                         printf("%02x ", buf[i] & 0xff);
 324                         if (i % 16 == 15)
 325                                 printf("\n");
 326                 }
 327                 if (len % 16)
 328                         printf("\n");
 329         }
 330
 331         if ((l = send(so, buf, len, 0)) < 0) {
 332                 perror("send");
 333                 goto end;
 334         }
 335
 336         msg = (struct sadb_msg *)rbuf;
 337         do {
 338                 if ((l = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
 339                         perror("recv");
 340                         goto end;
 341                 }
 342
 343                 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != l) {
 344                         warnx("invalid keymsg length");
 345                         break;
 346                 }
 347
 348                 if (f_verbose) {
 349                         kdebug_sadb((struct sadb_msg *)rbuf);
 350                         printf("\n");
 351                 }
 352                 if (postproc(msg, l) < 0)
 353                         break;
 354         } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
 355
 356         if (f_forever) {
 357                 fflush(stdout);
 358                 sleep(1);
 359                 goto again;
 360         }
 361
 362 end:
 363         return(0);
 364 }
 365
 366 int
 367 postproc(msg, len)
 368         struct sadb_msg *msg;
 369         int len;
 370 {
 371
 372         if (msg->sadb_msg_errno != 0) {
 373                 char inf[80];
 374                 const char *errmsg = NULL;
 375
 376                 if (f_mode == MODE_SCRIPT)
 377                         snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
 378                 else
 379                         inf[0] = '\0';
 380
 381                 switch (msg->sadb_msg_errno) {
 382                 case ENOENT:
 383                         switch (msg->sadb_msg_type) {
 384                         case SADB_DELETE:
 385                         case SADB_GET:
 386                         case SADB_X_SPDDELETE:
 387                                 errmsg = "No entry";
 388                                 break;
 389                         case SADB_DUMP:
 390                                 errmsg = "No SAD entries";
 391                                 break;
 392                         case SADB_X_SPDDUMP:
 393                                 errmsg = "No SPD entries";
 394                                 break;
 395                         }
 396                         break;
 397                 default:
 398                         errmsg = strerror(msg->sadb_msg_errno);
 399                 }
 400                 printf("%s%s.\n", inf, errmsg);
 401                 return(-1);
 402         }
 403
 404         switch (msg->sadb_msg_type) {
 405         case SADB_GET:
 406                 pfkey_sadump(msg);
 407                 break;
 408
 409         case SADB_DUMP:
 410                 /* filter out DEAD SAs */
 411                 if (!f_all) {
 412                         caddr_t mhp[SADB_EXT_MAX + 1];
 413                         struct sadb_sa *sa;
 414                         pfkey_align(msg, mhp);
 415                         pfkey_check(mhp);
 416                         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 417                                 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
 418                                         break;
 419                         }
 420                 }
 421                 if (f_forever)
 422                         shortdump(msg);
 423                 else
 424                         pfkey_sadump(msg);
 425                 msg = (struct sadb_msg *)((caddr_t)msg +
 426                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 427                 if (f_verbose) {
 428                         kdebug_sadb((struct sadb_msg *)msg);
 429                         printf("\n");
 430                 }
 431                 break;
 432
 433         case SADB_X_SPDDUMP:
 434                 pfkey_spdump(msg);
 435                 if (msg->sadb_msg_seq == 0) break;
 436                 msg = (struct sadb_msg *)((caddr_t)msg +
 437                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 438                 if (f_verbose) {
 439                         kdebug_sadb((struct sadb_msg *)msg);
 440                         printf("\n");
 441                 }
 442                 break;
 443         }
 444
 445         return(0);
 446 }
 447
 448 /*------------------------------------------------------------*/
 449 static const char *satype[] = {
 450         NULL, NULL, "ah", "esp"
 451 };
 452 static const char *sastate[] = {
 453         "L", "M", "D", "d"
 454 };
 455 static const char *ipproto[] = {
 456 /*0*/   "ip", "icmp", "igmp", "ggp", "ip4",
 457         NULL, "tcp", NULL, "egp", NULL,
 458 /*10*/  NULL, NULL, NULL, NULL, NULL,
 459         NULL, NULL, "udp", NULL, NULL,
 460 /*20*/  NULL, NULL, "idp", NULL, NULL,
 461         NULL, NULL, NULL, NULL, "tp",
 462 /*30*/  NULL, NULL, NULL, NULL, NULL,
 463         NULL, NULL, NULL, NULL, NULL,
 464 /*40*/  NULL, "ip6", NULL, "rt6", "frag6",
 465         NULL, "rsvp", "gre", NULL, NULL,
 466 /*50*/  "esp", "ah", NULL, NULL, NULL,
 467         NULL, NULL, NULL, "icmp6", "none",
 468 /*60*/  "dst6",
 469 };
 470
 471 #define STR_OR_ID(x, tab) \
 472         (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
 473
 474 const char *
 475 numstr(x)
 476         int x;
 477 {
 478         static char buf[20];
 479         snprintf(buf, sizeof(buf), "#%d", x);
 480         return buf;
 481 }
 482
 483 void
 484 shortdump_hdr()
 485 {
 486         printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
 487                 "time", "p", "s", "spi", "ltime", "src", "dst");
 488 }
 489
 490 void
 491 shortdump(msg)
 492         struct sadb_msg *msg;
 493 {
 494         caddr_t mhp[SADB_EXT_MAX + 1];
 495         char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
 496         struct sadb_sa *sa;
 497         struct sadb_address *saddr;
 498         struct sadb_lifetime *lts, *lth, *ltc;
 499         struct sockaddr *s;
 500         u_int t;
 501         time_t cur = time(0);
 502
 503         pfkey_align(msg, mhp);
 504         pfkey_check(mhp);
 505
 506         printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
 507
 508         printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
 509
 510         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 511                 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
 512                 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
 513         } else
 514                 printf("%-1s %-8s", "?", "?");
 515
 516         lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
 517         lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
 518         ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
 519         if (lts && lth && ltc) {
 520                 if (ltc->sadb_lifetime_addtime == 0)
 521                         t = (u_long)0;
 522                 else
 523                         t = (u_long)(cur - ltc->sadb_lifetime_addtime);
 524                 if (t >= 1000)
 525                         strlcpy(buf, " big/", sizeof(buf));
 526                 else
 527                         snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
 528                 printf("%s", buf);
 529
 530                 t = (u_long)lth->sadb_lifetime_addtime;
 531                 if (t >= 1000)
 532                         strlcpy(buf, "big", sizeof(buf));
 533                 else
 534                         snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
 535                 printf("%s", buf);
 536         } else
 537                 printf(" ??\?/???");    /* backslash to avoid trigraph ??/ */
 538
 539         printf(" ");
 540
 541         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
 542                 if (saddr->sadb_address_proto)
 543                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 544                 s = (struct sockaddr *)(saddr + 1);
 545                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 546                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 547                 if (strcmp(pbuf, "0") != 0)
 548                         printf("%s[%s]", buf, pbuf);
 549                 else
 550                         printf("%s", buf);
 551         } else
 552                 printf("?");
 553
 554         printf(" -> ");
 555
 556         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
 557                 if (saddr->sadb_address_proto)
 558                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 559
 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("\n");
 571 }
 572
 573 /* From: tcpdump(1):gmt2local.c and util.c */
 574 /*
 575  * Print the timestamp
 576  */
 577 static void
 578 printdate()
 579 {
 580         struct timeval tp;
 581         int s;
 582
 583         if (gettimeofday(&tp, NULL) == -1) {
 584                 perror("gettimeofday");
 585                 return;
 586         }
 587
 588         if (f_tflag == 1) {
 589                 /* Default */
 590                 s = (tp.tv_sec + thiszone ) % 86400;
 591                 (void)printf("%02d:%02d:%02d.%06u ",
 592                     s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
 593         } else if (f_tflag > 1) {
 594                 /* Unix timeval style */
 595                 (void)printf("%u.%06u ",
 596                     (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
 597         }
 598
 599         printf("\n");
 600 }
 601
 602 /*
 603  * Returns the difference between gmt and local time in seconds.
 604  * Use gmtime() and localtime() to keep things simple.
 605  */
 606 int32_t
 607 gmt2local(time_t t)
 608 {
 609         register int dt, dir;
 610         register struct tm *gmt, *loc;
 611         struct tm sgmt;
 612
 613         if (t == 0)
 614                 t = time(NULL);
 615         gmt = &sgmt;
 616         *gmt = *gmtime(&t);
 617         loc = localtime(&t);
 618         dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
 619             (loc->tm_min - gmt->tm_min) * 60;
 620
 621         /*
 622          * If the year or julian day is different, we span 00:00 GMT
 623          * and must add or subtract a day. Check the year first to
 624          * avoid problems when the julian day wraps.
 625          */
 626         dir = loc->tm_year - gmt->tm_year;
 627         if (dir == 0)
 628                 dir = loc->tm_yday - gmt->tm_yday;
 629         dt += dir * 24 * 60 * 60;
 630
 631         return (dt);
 632 }