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 *, int);
  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 int so;
  77
  78 int f_forever = 0;
  79 int f_all = 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 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()
  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(ac, av)
 107         int ac;
 108         char **av;
 109 {
 110         FILE *fp = stdin;
 111         int c;
 112
 113         if (ac == 1) {
 114                 usage();
 115                 /* NOTREACHED */
 116         }
 117
 118         thiszone = gmt2local(0);
 119
 120         while ((c = getopt(ac, av, "acdf:ghltvxDFP")) != -1) {
 121                 switch (c) {
 122                 case 'c':
 123                         f_mode = MODE_SCRIPT;
 124                         fp = stdin;
 125                         break;
 126                 case 'f':
 127                         f_mode = MODE_SCRIPT;
 128                         if ((fp = fopen(optarg, "r")) == NULL) {
 129                                 err(-1, "fopen");
 130                                 /*NOTREACHED*/
 131                         }
 132                         break;
 133                 case 'D':
 134                         f_mode = MODE_CMDDUMP;
 135                         break;
 136                 case 'F':
 137                         f_mode = MODE_CMDFLUSH;
 138                         break;
 139                 case 'a':
 140                         f_all = 1;
 141                         break;
 142                 case 'l':
 143                         f_forever = 1;
 144                         break;
 145                 case 'h':
 146                         f_hexdump = 1;
 147                         break;
 148                 case 'x':
 149                         f_mode = MODE_PROMISC;
 150                         f_tflag++;
 151                         break;
 152                 case 'P':
 153                         f_policy = 1;
 154                         break;
 155                 case 'g': /* global */
 156                         f_scope |= IPSEC_POLICYSCOPE_GLOBAL;
 157                         break;
 158                 case 't': /* tunnel */
 159                         f_scope |= IPSEC_POLICYSCOPE_IFNET;
 160                         break;
 161                 case 'v':
 162                         f_verbose = 1;
 163                         break;
 164                 default:
 165                         usage();
 166                         /*NOTREACHED*/
 167                 }
 168         }
 169
 170         so = pfkey_open();
 171         if (so < 0) {
 172                 perror("pfkey_open");
 173                 exit(1);
 174         }
 175
 176         switch (f_mode) {
 177         case MODE_CMDDUMP:
 178                 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP,
 179                     f_policy ? f_scope: SADB_SATYPE_UNSPEC);
 180                 break;
 181         case MODE_CMDFLUSH:
 182                 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH,
 183                     SADB_SATYPE_UNSPEC);
 184                 break;
 185         case MODE_SCRIPT:
 186                 if (get_supported() < 0) {
 187                         errx(-1, "%s", ipsec_strerror());
 188                         /*NOTREACHED*/
 189                 }
 190                 if (parse(&fp))
 191                         exit (1);
 192                 break;
 193         case MODE_PROMISC:
 194                 promisc();
 195                 /*NOTREACHED*/
 196         default:
 197                 usage();
 198                 /*NOTREACHED*/
 199         }
 200
 201         exit(0);
 202 }
 203
 204 int
 205 get_supported()
 206 {
 207
 208         if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
 209                 return -1;
 210
 211         if (pfkey_recv_register(so) < 0)
 212                 return -1;
 213
 214         return 0;
 215 }
 216
 217 void
 218 sendkeyshort(u_int type, uint8_t satype)
 219 {
 220         struct sadb_msg msg;
 221
 222         msg.sadb_msg_version = PF_KEY_V2;
 223         msg.sadb_msg_type = type;
 224         msg.sadb_msg_errno = 0;
 225         msg.sadb_msg_satype = satype;
 226         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 227         msg.sadb_msg_reserved = 0;
 228         msg.sadb_msg_seq = 0;
 229         msg.sadb_msg_pid = getpid();
 230
 231         sendkeymsg((char *)&msg, sizeof(msg));
 232
 233         return;
 234 }
 235
 236 void
 237 promisc()
 238 {
 239         struct sadb_msg msg;
 240         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 241         ssize_t l;
 242
 243         msg.sadb_msg_version = PF_KEY_V2;
 244         msg.sadb_msg_type = SADB_X_PROMISC;
 245         msg.sadb_msg_errno = 0;
 246         msg.sadb_msg_satype = 1;
 247         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 248         msg.sadb_msg_reserved = 0;
 249         msg.sadb_msg_seq = 0;
 250         msg.sadb_msg_pid = getpid();
 251
 252         if ((l = send(so, &msg, sizeof(msg), 0)) < 0) {
 253                 err(1, "send");
 254                 /*NOTREACHED*/
 255         }
 256
 257         while (1) {
 258                 struct sadb_msg *base;
 259
 260                 if ((l = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
 261                         err(1, "recv");
 262                         /*NOTREACHED*/
 263                 }
 264
 265                 if (l != sizeof(*base))
 266                         continue;
 267
 268                 base = (struct sadb_msg *)rbuf;
 269                 if ((l = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
 270                                 0)) < 0) {
 271                         err(1, "recv");
 272                         /*NOTREACHED*/
 273                 }
 274                 printdate();
 275                 if (f_hexdump) {
 276                         int i;
 277                         for (i = 0; i < l; i++) {
 278                                 if (i % 16 == 0)
 279                                         printf("%08x: ", i);
 280                                 printf("%02x ", rbuf[i] & 0xff);
 281                                 if (i % 16 == 15)
 282                                         printf("\n");
 283                         }
 284                         if (l % 16)
 285                                 printf("\n");
 286                 }
 287                 /* adjust base pointer for promisc mode */
 288                 if (base->sadb_msg_type == SADB_X_PROMISC) {
 289                         if ((ssize_t)sizeof(*base) < l)
 290                                 base++;
 291                         else
 292                                 base = NULL;
 293                 }
 294                 if (base) {
 295                         kdebug_sadb(base);
 296                         printf("\n");
 297                         fflush(stdout);
 298                 }
 299         }
 300 }
 301
 302 int
 303 sendkeymsg(buf, len)
 304         char *buf;
 305         size_t len;
 306 {
 307         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 308         ssize_t l;
 309         struct sadb_msg *msg;
 310
 311     {
 312         struct timeval tv;
 313         tv.tv_sec = 1;
 314         tv.tv_usec = 0;
 315         if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
 316                 perror("setsockopt");
 317                 goto end;
 318         }
 319     }
 320
 321         if (f_forever)
 322                 shortdump_hdr();
 323 again:
 324         if (f_verbose) {
 325                 kdebug_sadb((struct sadb_msg *)buf);
 326                 printf("\n");
 327         }
 328         if (f_hexdump) {
 329                 int i;
 330                 for (i = 0; i < len; i++) {
 331                         if (i % 16 == 0)
 332                                 printf("%08x: ", i);
 333                         printf("%02x ", buf[i] & 0xff);
 334                         if (i % 16 == 15)
 335                                 printf("\n");
 336                 }
 337                 if (len % 16)
 338                         printf("\n");
 339         }
 340
 341         if ((l = send(so, buf, len, 0)) < 0) {
 342                 perror("send");
 343                 goto end;
 344         }
 345
 346         msg = (struct sadb_msg *)rbuf;
 347         do {
 348                 if ((l = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
 349                         perror("recv");
 350                         goto end;
 351                 }
 352
 353                 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != l) {
 354                         warnx("invalid keymsg length");
 355                         break;
 356                 }
 357
 358                 if (f_verbose) {
 359                         kdebug_sadb((struct sadb_msg *)rbuf);
 360                         printf("\n");
 361                 }
 362                 if (postproc(msg, l) < 0)
 363                         break;
 364         } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
 365
 366         if (f_forever) {
 367                 fflush(stdout);
 368                 sleep(1);
 369                 goto again;
 370         }
 371
 372 end:
 373         return(0);
 374 }
 375
 376 int
 377 postproc(msg, len)
 378         struct sadb_msg *msg;
 379         int len;
 380 {
 381
 382         if (msg->sadb_msg_errno != 0) {
 383                 char inf[80];
 384                 const char *errmsg = NULL;
 385
 386                 if (f_mode == MODE_SCRIPT)
 387                         snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
 388                 else
 389                         inf[0] = '\0';
 390
 391                 switch (msg->sadb_msg_errno) {
 392                 case ENOENT:
 393                         switch (msg->sadb_msg_type) {
 394                         case SADB_DELETE:
 395                         case SADB_GET:
 396                         case SADB_X_SPDDELETE:
 397                                 errmsg = "No entry";
 398                                 break;
 399                         case SADB_DUMP:
 400                                 errmsg = "No SAD entries";
 401                                 break;
 402                         case SADB_X_SPDDUMP:
 403                                 errmsg = "No SPD entries";
 404                                 break;
 405                         }
 406                         break;
 407                 default:
 408                         errmsg = strerror(msg->sadb_msg_errno);
 409                 }
 410                 printf("%s%s.\n", inf, errmsg);
 411                 return(-1);
 412         }
 413
 414         switch (msg->sadb_msg_type) {
 415         case SADB_GET:
 416                 pfkey_sadump(msg);
 417                 break;
 418
 419         case SADB_DUMP:
 420                 /* filter out DEAD SAs */
 421                 if (!f_all) {
 422                         caddr_t mhp[SADB_EXT_MAX + 1];
 423                         struct sadb_sa *sa;
 424                         pfkey_align(msg, mhp);
 425                         pfkey_check(mhp);
 426                         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 427                                 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
 428                                         break;
 429                         }
 430                 }
 431                 if (f_forever)
 432                         shortdump(msg);
 433                 else
 434                         pfkey_sadump(msg);
 435                 msg = (struct sadb_msg *)((caddr_t)msg +
 436                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 437                 if (f_verbose) {
 438                         kdebug_sadb((struct sadb_msg *)msg);
 439                         printf("\n");
 440                 }
 441                 break;
 442
 443         case SADB_X_SPDDUMP:
 444                 pfkey_spdump(msg);
 445                 if (msg->sadb_msg_seq == 0) break;
 446                 msg = (struct sadb_msg *)((caddr_t)msg +
 447                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 448                 if (f_verbose) {
 449                         kdebug_sadb((struct sadb_msg *)msg);
 450                         printf("\n");
 451                 }
 452                 break;
 453         }
 454
 455         return(0);
 456 }
 457
 458 /*------------------------------------------------------------*/
 459 static const char *satype[] = {
 460         NULL, NULL, "ah", "esp"
 461 };
 462 static const char *sastate[] = {
 463         "L", "M", "D", "d"
 464 };
 465 static const char *ipproto[] = {
 466 /*0*/   "ip", "icmp", "igmp", "ggp", "ip4",
 467         NULL, "tcp", NULL, "egp", NULL,
 468 /*10*/  NULL, NULL, NULL, NULL, NULL,
 469         NULL, NULL, "udp", NULL, NULL,
 470 /*20*/  NULL, NULL, "idp", NULL, NULL,
 471         NULL, NULL, NULL, NULL, "tp",
 472 /*30*/  NULL, NULL, NULL, NULL, NULL,
 473         NULL, NULL, NULL, NULL, NULL,
 474 /*40*/  NULL, "ip6", NULL, "rt6", "frag6",
 475         NULL, "rsvp", "gre", NULL, NULL,
 476 /*50*/  "esp", "ah", NULL, NULL, NULL,
 477         NULL, NULL, NULL, "icmp6", "none",
 478 /*60*/  "dst6",
 479 };
 480
 481 #define STR_OR_ID(x, tab) \
 482         (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
 483
 484 const char *
 485 numstr(x)
 486         int x;
 487 {
 488         static char buf[20];
 489         snprintf(buf, sizeof(buf), "#%d", x);
 490         return buf;
 491 }
 492
 493 void
 494 shortdump_hdr()
 495 {
 496         printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
 497                 "time", "p", "s", "spi", "ltime", "src", "dst");
 498 }
 499
 500 void
 501 shortdump(msg)
 502         struct sadb_msg *msg;
 503 {
 504         caddr_t mhp[SADB_EXT_MAX + 1];
 505         char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
 506         struct sadb_sa *sa;
 507         struct sadb_address *saddr;
 508         struct sadb_lifetime *lts, *lth, *ltc;
 509         struct sockaddr *s;
 510         u_int t;
 511         time_t cur = time(0);
 512
 513         pfkey_align(msg, mhp);
 514         pfkey_check(mhp);
 515
 516         printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
 517
 518         printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
 519
 520         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 521                 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
 522                 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
 523         } else
 524                 printf("%-1s %-8s", "?", "?");
 525
 526         lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
 527         lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
 528         ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
 529         if (lts && lth && ltc) {
 530                 if (ltc->sadb_lifetime_addtime == 0)
 531                         t = (u_long)0;
 532                 else
 533                         t = (u_long)(cur - ltc->sadb_lifetime_addtime);
 534                 if (t >= 1000)
 535                         strlcpy(buf, " big/", sizeof(buf));
 536                 else
 537                         snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
 538                 printf("%s", buf);
 539
 540                 t = (u_long)lth->sadb_lifetime_addtime;
 541                 if (t >= 1000)
 542                         strlcpy(buf, "big", sizeof(buf));
 543                 else
 544                         snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
 545                 printf("%s", buf);
 546         } else
 547                 printf(" ??\?/???");    /* backslash to avoid trigraph ??/ */
 548
 549         printf(" ");
 550
 551         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
 552                 if (saddr->sadb_address_proto)
 553                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 554                 s = (struct sockaddr *)(saddr + 1);
 555                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 556                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 557                 if (strcmp(pbuf, "0") != 0)
 558                         printf("%s[%s]", buf, pbuf);
 559                 else
 560                         printf("%s", buf);
 561         } else
 562                 printf("?");
 563
 564         printf(" -> ");
 565
 566         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
 567                 if (saddr->sadb_address_proto)
 568                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 569
 570                 s = (struct sockaddr *)(saddr + 1);
 571                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 572                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 573                 if (strcmp(pbuf, "0") != 0)
 574                         printf("%s[%s]", buf, pbuf);
 575                 else
 576                         printf("%s", buf);
 577         } else
 578                 printf("?");
 579
 580         printf("\n");
 581 }
 582
 583 /* From: tcpdump(1):gmt2local.c and util.c */
 584 /*
 585  * Print the timestamp
 586  */
 587 static void
 588 printdate()
 589 {
 590         struct timeval tp;
 591         int s;
 592
 593         if (gettimeofday(&tp, NULL) == -1) {
 594                 perror("gettimeofday");
 595                 return;
 596         }
 597
 598         if (f_tflag == 1) {
 599                 /* Default */
 600                 s = (tp.tv_sec + thiszone ) % 86400;
 601                 (void)printf("%02d:%02d:%02d.%06u ",
 602                     s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
 603         } else if (f_tflag > 1) {
 604                 /* Unix timeval style */
 605                 (void)printf("%u.%06u ",
 606                     (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
 607         }
 608
 609         printf("\n");
 610 }
 611
 612 /*
 613  * Returns the difference between gmt and local time in seconds.
 614  * Use gmtime() and localtime() to keep things simple.
 615  */
 616 int32_t
 617 gmt2local(time_t t)
 618 {
 619         register int dt, dir;
 620         register struct tm *gmt, *loc;
 621         struct tm sgmt;
 622
 623         if (t == 0)
 624                 t = time(NULL);
 625         gmt = &sgmt;
 626         *gmt = *gmtime(&t);
 627         loc = localtime(&t);
 628         dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
 629             (loc->tm_min - gmt->tm_min) * 60;
 630
 631         /*
 632          * If the year or julian day is different, we span 00:00 GMT
 633          * and must add or subtract a day. Check the year first to
 634          * avoid problems when the julian day wraps.
 635          */
 636         dir = loc->tm_year - gmt->tm_year;
 637         if (dir == 0)
 638                 dir = loc->tm_yday - gmt->tm_yday;
 639         dt += dir * 24 * 60 * 60;
 640
 641         return (dt);
 642 }