sbin/setkey/setkey.c

   1 /*      $FreeBSD$       */
   2 /*      $KAME: setkey.c,v 1.28 2003/06/27 07:15:45 itojun Exp $ */
   3
   4 /*-
   5  * SPDX-License-Identifier: BSD-3-Clause
   6  *
   7  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the project nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/socket.h>
  38 #include <sys/time.h>
  39 #include <err.h>
  40 #include <net/route.h>
  41 #include <netinet/in.h>
  42 #include <net/pfkeyv2.h>
  43 #include <netipsec/keydb.h>
  44 #include <netipsec/key_debug.h>
  45 #include <netipsec/ipsec.h>
  46
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <limits.h>
  50 #include <string.h>
  51 #include <ctype.h>
  52 #include <unistd.h>
  53 #include <errno.h>
  54 #include <netdb.h>
  55
  56 #include "libpfkey.h"
  57
  58 void usage(void);
  59 int main(int, char **);
  60 int get_supported(void);
  61 void sendkeyshort(u_int, uint8_t);
  62 void promisc(void);
  63 int sendkeymsg(char *, size_t);
  64 int postproc(struct sadb_msg *);
  65 const char *numstr(int);
  66 void shortdump_hdr(void);
  67 void shortdump(struct sadb_msg *);
  68 static void printdate(void);
  69 static int32_t gmt2local(time_t);
  70
  71 #define MODE_SCRIPT     1
  72 #define MODE_CMDDUMP    2
  73 #define MODE_CMDFLUSH   3
  74 #define MODE_PROMISC    4
  75
  76 static int so;
  77
  78 static int f_forever = 0;
  79 static int f_all = 0;
  80 static int f_verbose = 0;
  81 static int f_mode = 0;
  82 static int f_cmddump = 0;
  83 static int f_policy = 0;
  84 static int f_hexdump = 0;
  85 static int f_tflag = 0;
  86 static int f_scope = 0;
  87 static time_t thiszone;
  88
  89 extern int lineno;
  90
  91 extern int parse(FILE **);
  92
  93 void
  94 usage(void)
  95 {
  96
  97         printf("usage: setkey [-v] -c\n");
  98         printf("       setkey [-v] -f filename\n");
  99         printf("       setkey [-Pagltv] -D\n");
 100         printf("       setkey [-Pv] -F\n");
 101         printf("       setkey [-h] -x\n");
 102         exit(1);
 103 }
 104
 105 int
 106 main(int ac, char **av)
 107 {
 108         FILE *fp = stdin;
 109         int c;
 110
 111         if (ac == 1) {
 112                 usage();
 113                 /* NOTREACHED */
 114         }
 115
 116         thiszone = gmt2local(0);
 117
 118         while ((c = getopt(ac, av, "acdf:ghltvxDFP")) != -1) {
 119                 switch (c) {
 120                 case 'c':
 121                         f_mode = MODE_SCRIPT;
 122                         fp = stdin;
 123                         break;
 124                 case 'f':
 125                         f_mode = MODE_SCRIPT;
 126                         if ((fp = fopen(optarg, "r")) == NULL) {
 127                                 err(-1, "fopen");
 128                                 /*NOTREACHED*/
 129                         }
 130                         break;
 131                 case 'D':
 132                         f_mode = MODE_CMDDUMP;
 133                         break;
 134                 case 'F':
 135                         f_mode = MODE_CMDFLUSH;
 136                         break;
 137                 case 'a':
 138                         f_all = 1;
 139                         break;
 140                 case 'l':
 141                         f_forever = 1;
 142                         break;
 143                 case 'h':
 144                         f_hexdump = 1;
 145                         break;
 146                 case 'x':
 147                         f_mode = MODE_PROMISC;
 148                         f_tflag++;
 149                         break;
 150                 case 'P':
 151                         f_policy = 1;
 152                         break;
 153                 case 'g': /* global */
 154                         f_scope |= IPSEC_POLICYSCOPE_GLOBAL;
 155                         break;
 156                 case 't': /* tunnel */
 157                         f_scope |= IPSEC_POLICYSCOPE_IFNET;
 158                         break;
 159                 case 'v':
 160                         f_verbose = 1;
 161                         break;
 162                 default:
 163                         usage();
 164                         /*NOTREACHED*/
 165                 }
 166         }
 167
 168         so = pfkey_open();
 169         if (so < 0) {
 170                 perror("pfkey_open");
 171                 exit(1);
 172         }
 173
 174         switch (f_mode) {
 175         case MODE_CMDDUMP:
 176                 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP,
 177                     f_policy ? f_scope: SADB_SATYPE_UNSPEC);
 178                 break;
 179         case MODE_CMDFLUSH:
 180                 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH,
 181                     SADB_SATYPE_UNSPEC);
 182                 break;
 183         case MODE_SCRIPT:
 184                 if (get_supported() < 0) {
 185                         errx(-1, "%s", ipsec_strerror());
 186                         /*NOTREACHED*/
 187                 }
 188                 if (parse(&fp))
 189                         exit (1);
 190                 break;
 191         case MODE_PROMISC:
 192                 promisc();
 193                 /*NOTREACHED*/
 194         default:
 195                 usage();
 196                 /*NOTREACHED*/
 197         }
 198
 199         exit(0);
 200 }
 201
 202 int
 203 get_supported(void)
 204 {
 205
 206         if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
 207                 return -1;
 208
 209         if (pfkey_recv_register(so) < 0)
 210                 return -1;
 211
 212         return 0;
 213 }
 214
 215 void
 216 sendkeyshort(u_int type, uint8_t satype)
 217 {
 218         struct sadb_msg msg;
 219
 220         msg.sadb_msg_version = PF_KEY_V2;
 221         msg.sadb_msg_type = type;
 222         msg.sadb_msg_errno = 0;
 223         msg.sadb_msg_satype = satype;
 224         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 225         msg.sadb_msg_reserved = 0;
 226         msg.sadb_msg_seq = 0;
 227         msg.sadb_msg_pid = getpid();
 228
 229         sendkeymsg((char *)&msg, sizeof(msg));
 230
 231         return;
 232 }
 233
 234 void
 235 promisc(void)
 236 {
 237         struct sadb_msg msg;
 238         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 239         ssize_t l;
 240
 241         msg.sadb_msg_version = PF_KEY_V2;
 242         msg.sadb_msg_type = SADB_X_PROMISC;
 243         msg.sadb_msg_errno = 0;
 244         msg.sadb_msg_satype = 1;
 245         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 246         msg.sadb_msg_reserved = 0;
 247         msg.sadb_msg_seq = 0;
 248         msg.sadb_msg_pid = getpid();
 249
 250         if ((l = send(so, &msg, sizeof(msg), 0)) < 0) {
 251                 err(1, "send");
 252                 /*NOTREACHED*/
 253         }
 254
 255         while (1) {
 256                 struct sadb_msg *base;
 257
 258                 if ((l = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
 259                         err(1, "recv");
 260                         /*NOTREACHED*/
 261                 }
 262
 263                 if (l != sizeof(*base))
 264                         continue;
 265
 266                 base = (struct sadb_msg *)rbuf;
 267                 if ((l = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
 268                                 0)) < 0) {
 269                         err(1, "recv");
 270                         /*NOTREACHED*/
 271                 }
 272                 printdate();
 273                 if (f_hexdump) {
 274                         int i;
 275                         for (i = 0; i < l; i++) {
 276                                 if (i % 16 == 0)
 277                                         printf("%08x: ", i);
 278                                 printf("%02x ", rbuf[i] & 0xff);
 279                                 if (i % 16 == 15)
 280                                         printf("\n");
 281                         }
 282                         if (l % 16)
 283                                 printf("\n");
 284                 }
 285                 /* adjust base pointer for promisc mode */
 286                 if (base->sadb_msg_type == SADB_X_PROMISC) {
 287                         if ((ssize_t)sizeof(*base) < l)
 288                                 base++;
 289                         else
 290                                 base = NULL;
 291                 }
 292                 if (base) {
 293                         kdebug_sadb(base);
 294                         printf("\n");
 295                         fflush(stdout);
 296                 }
 297         }
 298 }
 299
 300 int
 301 sendkeymsg(char *buf, size_t len)
 302 {
 303         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 304         ssize_t l;
 305         struct sadb_msg *msg;
 306
 307     {
 308         struct timeval tv;
 309         tv.tv_sec = 1;
 310         tv.tv_usec = 0;
 311         if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
 312                 perror("setsockopt");
 313                 goto end;
 314         }
 315     }
 316
 317         if (f_forever)
 318                 shortdump_hdr();
 319 again:
 320         if (f_verbose) {
 321                 kdebug_sadb((struct sadb_msg *)buf);
 322                 printf("\n");
 323         }
 324         if (f_hexdump) {
 325                 size_t i;
 326                 for (i = 0; i < len; i++) {
 327                         if (i % 16 == 0)
 328                                 printf("%08x: ", (u_int)i);
 329                         printf("%02x ", buf[i] & 0xff);
 330                         if (i % 16 == 15)
 331                                 printf("\n");
 332                 }
 333                 if (len % 16)
 334                         printf("\n");
 335         }
 336
 337         if ((l = send(so, buf, len, 0)) < 0) {
 338                 perror("send");
 339                 goto end;
 340         }
 341
 342         msg = (struct sadb_msg *)rbuf;
 343         do {
 344                 if ((l = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
 345                         perror("recv");
 346                         goto end;
 347                 }
 348
 349                 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != l) {
 350                         warnx("invalid keymsg length");
 351                         break;
 352                 }
 353
 354                 if (f_verbose) {
 355                         kdebug_sadb((struct sadb_msg *)rbuf);
 356                         printf("\n");
 357                 }
 358                 if (postproc(msg) < 0)
 359                         break;
 360         } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
 361
 362         if (f_forever) {
 363                 fflush(stdout);
 364                 sleep(1);
 365                 goto again;
 366         }
 367
 368 end:
 369         return(0);
 370 }
 371
 372 int
 373 postproc(struct sadb_msg *msg)
 374 {
 375
 376         if (msg->sadb_msg_errno != 0) {
 377                 char inf[80];
 378                 const char *errmsg = NULL;
 379
 380                 if (f_mode == MODE_SCRIPT)
 381                         snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
 382                 else
 383                         inf[0] = '\0';
 384
 385                 switch (msg->sadb_msg_errno) {
 386                 case ENOENT:
 387                         switch (msg->sadb_msg_type) {
 388                         case SADB_DELETE:
 389                         case SADB_GET:
 390                         case SADB_X_SPDDELETE:
 391                                 errmsg = "No entry";
 392                                 break;
 393                         case SADB_DUMP:
 394                                 errmsg = "No SAD entries";
 395                                 break;
 396                         case SADB_X_SPDDUMP:
 397                                 errmsg = "No SPD entries";
 398                                 break;
 399                         }
 400                         break;
 401                 default:
 402                         errmsg = strerror(msg->sadb_msg_errno);
 403                 }
 404                 printf("%s%s.\n", inf, errmsg);
 405                 return(-1);
 406         }
 407
 408         switch (msg->sadb_msg_type) {
 409         case SADB_GET:
 410                 pfkey_sadump(msg);
 411                 break;
 412
 413         case SADB_DUMP:
 414                 /* filter out DEAD SAs */
 415                 if (!f_all) {
 416                         caddr_t mhp[SADB_EXT_MAX + 1];
 417                         struct sadb_sa *sa;
 418                         pfkey_align(msg, mhp);
 419                         pfkey_check(mhp);
 420                         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 421                                 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
 422                                         break;
 423                         }
 424                 }
 425                 if (f_forever)
 426                         shortdump(msg);
 427                 else
 428                         pfkey_sadump(msg);
 429                 msg = (struct sadb_msg *)((caddr_t)msg +
 430                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 431                 if (f_verbose) {
 432                         kdebug_sadb((struct sadb_msg *)msg);
 433                         printf("\n");
 434                 }
 435                 break;
 436
 437         case SADB_X_SPDDUMP:
 438                 pfkey_spdump(msg);
 439                 if (msg->sadb_msg_seq == 0) break;
 440                 msg = (struct sadb_msg *)((caddr_t)msg +
 441                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 442                 if (f_verbose) {
 443                         kdebug_sadb((struct sadb_msg *)msg);
 444                         printf("\n");
 445                 }
 446                 break;
 447         }
 448
 449         return(0);
 450 }
 451
 452 /*------------------------------------------------------------*/
 453 static const char *satype[] = {
 454         NULL, NULL, "ah", "esp"
 455 };
 456 static const char *sastate[] = {
 457         "L", "M", "D", "d"
 458 };
 459 static const char *ipproto[] = {
 460 /*0*/   "ip", "icmp", "igmp", "ggp", "ip4",
 461         NULL, "tcp", NULL, "egp", NULL,
 462 /*10*/  NULL, NULL, NULL, NULL, NULL,
 463         NULL, NULL, "udp", NULL, NULL,
 464 /*20*/  NULL, NULL, "idp", NULL, NULL,
 465         NULL, NULL, NULL, NULL, "tp",
 466 /*30*/  NULL, NULL, NULL, NULL, NULL,
 467         NULL, NULL, NULL, NULL, NULL,
 468 /*40*/  NULL, "ip6", NULL, "rt6", "frag6",
 469         NULL, "rsvp", "gre", NULL, NULL,
 470 /*50*/  "esp", "ah", NULL, NULL, NULL,
 471         NULL, NULL, NULL, "icmp6", "none",
 472 /*60*/  "dst6",
 473 };
 474
 475 #define STR_OR_ID(x, tab) \
 476         (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
 477
 478 const char *
 479 numstr(int x)
 480 {
 481         static char buf[20];
 482         snprintf(buf, sizeof(buf), "#%d", x);
 483         return buf;
 484 }
 485
 486 void
 487 shortdump_hdr(void)
 488 {
 489         printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
 490                 "time", "p", "s", "spi", "ltime", "src", "dst");
 491 }
 492
 493 void
 494 shortdump(struct sadb_msg *msg)
 495 {
 496         caddr_t mhp[SADB_EXT_MAX + 1];
 497         char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
 498         struct sadb_sa *sa;
 499         struct sadb_address *saddr;
 500         struct sadb_lifetime *lts, *lth, *ltc;
 501         struct sockaddr *s;
 502         u_int t;
 503         time_t cur = time(0);
 504
 505         pfkey_align(msg, mhp);
 506         pfkey_check(mhp);
 507
 508         printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
 509
 510         printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
 511
 512         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 513                 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
 514                 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
 515         } else
 516                 printf("%-1s %-8s", "?", "?");
 517
 518         lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
 519         lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
 520         ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
 521         if (lts && lth && ltc) {
 522                 if (ltc->sadb_lifetime_addtime == 0)
 523                         t = (u_long)0;
 524                 else
 525                         t = (u_long)(cur - ltc->sadb_lifetime_addtime);
 526                 if (t >= 1000)
 527                         strlcpy(buf, " big/", sizeof(buf));
 528                 else
 529                         snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
 530                 printf("%s", buf);
 531
 532                 t = (u_long)lth->sadb_lifetime_addtime;
 533                 if (t >= 1000)
 534                         strlcpy(buf, "big", sizeof(buf));
 535                 else
 536                         snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
 537                 printf("%s", buf);
 538         } else
 539                 printf(" ??\?/???");    /* backslash to avoid trigraph ??/ */
 540
 541         printf(" ");
 542
 543         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
 544                 if (saddr->sadb_address_proto)
 545                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 546                 s = (struct sockaddr *)(saddr + 1);
 547                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 548                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 549                 if (strcmp(pbuf, "0") != 0)
 550                         printf("%s[%s]", buf, pbuf);
 551                 else
 552                         printf("%s", buf);
 553         } else
 554                 printf("?");
 555
 556         printf(" -> ");
 557
 558         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
 559                 if (saddr->sadb_address_proto)
 560                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 561
 562                 s = (struct sockaddr *)(saddr + 1);
 563                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 564                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 565                 if (strcmp(pbuf, "0") != 0)
 566                         printf("%s[%s]", buf, pbuf);
 567                 else
 568                         printf("%s", buf);
 569         } else
 570                 printf("?");
 571
 572         printf("\n");
 573 }
 574
 575 /* From: tcpdump(1):gmt2local.c and util.c */
 576 /*
 577  * Print the timestamp
 578  */
 579 static void
 580 printdate(void)
 581 {
 582         struct timeval tp;
 583         int s;
 584
 585         if (gettimeofday(&tp, NULL) == -1) {
 586                 perror("gettimeofday");
 587                 return;
 588         }
 589
 590         if (f_tflag == 1) {
 591                 /* Default */
 592                 s = (tp.tv_sec + thiszone ) % 86400;
 593                 (void)printf("%02d:%02d:%02d.%06u ",
 594                     s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
 595         } else if (f_tflag > 1) {
 596                 /* Unix timeval style */
 597                 (void)printf("%u.%06u ",
 598                     (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
 599         }
 600
 601         printf("\n");
 602 }
 603
 604 /*
 605  * Returns the difference between gmt and local time in seconds.
 606  * Use gmtime() and localtime() to keep things simple.
 607  */
 608 int32_t
 609 gmt2local(time_t t)
 610 {
 611         register int dt, dir;
 612         register struct tm *gmt, *loc;
 613         struct tm sgmt;
 614
 615         if (t == 0)
 616                 t = time(NULL);
 617         gmt = &sgmt;
 618         *gmt = *gmtime(&t);
 619         loc = localtime(&t);
 620         dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
 621             (loc->tm_min - gmt->tm_min) * 60;
 622
 623         /*
 624          * If the year or julian day is different, we span 00:00 GMT
 625          * and must add or subtract a day. Check the year first to
 626          * avoid problems when the julian day wraps.
 627          */
 628         dir = loc->tm_year - gmt->tm_year;
 629         if (dir == 0)
 630                 dir = loc->tm_yday - gmt->tm_yday;
 631         dt += dir * 24 * 60 * 60;
 632
 633         return (dt);
 634 }