sbin/setkey/setkey.c

   1 /*      $KAME: setkey.c,v 1.28 2003/06/27 07:15:45 itojun Exp $ */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-3-Clause
   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/linker.h>
  37 #include <sys/module.h>
  38 #include <sys/socket.h>
  39 #include <sys/time.h>
  40 #include <err.h>
  41 #include <net/route.h>
  42 #include <netinet/in.h>
  43 #include <net/pfkeyv2.h>
  44 #include <netipsec/keydb.h>
  45 #include <netipsec/key_debug.h>
  46 #include <netipsec/ipsec.h>
  47
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <limits.h>
  51 #include <string.h>
  52 #include <ctype.h>
  53 #include <unistd.h>
  54 #include <errno.h>
  55 #include <netdb.h>
  56
  57 #include "libpfkey.h"
  58
  59 void usage(void);
  60 int main(int, char **);
  61 int get_supported(void);
  62 void sendkeyshort(u_int, uint8_t);
  63 void promisc(void);
  64 int sendkeymsg(char *, size_t);
  65 int postproc(struct sadb_msg *);
  66 const char *numstr(int);
  67 void shortdump_hdr(void);
  68 void shortdump(struct sadb_msg *);
  69 static void printdate(void);
  70 static int32_t gmt2local(time_t);
  71 static int modload(const char *name);
  72
  73 #define MODE_SCRIPT     1
  74 #define MODE_CMDDUMP    2
  75 #define MODE_CMDFLUSH   3
  76 #define MODE_PROMISC    4
  77
  78 static int so;
  79
  80 static int f_forever = 0;
  81 static int f_all = 0;
  82 static int f_verbose = 0;
  83 static int f_mode = 0;
  84 static int f_cmddump = 0;
  85 static int f_policy = 0;
  86 static int f_hexdump = 0;
  87 static int f_tflag = 0;
  88 static int f_scope = 0;
  89 static time_t thiszone;
  90
  91 extern int lineno;
  92
  93 extern int parse(FILE **);
  94
  95 void
  96 usage(void)
  97 {
  98
  99         printf("usage: setkey [-v] -c\n");
 100         printf("       setkey [-v] -f filename\n");
 101         printf("       setkey [-v] -e \"<script>\"\n");
 102         printf("       setkey [-Pagltv] -D\n");
 103         printf("       setkey [-Pv] -F\n");
 104         printf("       setkey [-h] -x\n");
 105         exit(1);
 106 }
 107
 108 static int
 109 modload(const char *name)
 110 {
 111         if (modfind(name) < 0)
 112                 if (kldload(name) < 0 || modfind(name) < 0) {
 113                         warn("%s: module not found", name);
 114                         return 0;
 115         }
 116         return 1;
 117 }
 118
 119 int
 120 main(int ac, char **av)
 121 {
 122         FILE *fp = stdin;
 123         int c;
 124
 125         if (ac == 1) {
 126                 usage();
 127                 /* NOTREACHED */
 128         }
 129
 130         thiszone = gmt2local(0);
 131
 132         while ((c = getopt(ac, av, "acde:f:ghltvxDFP")) != -1) {
 133                 switch (c) {
 134                 case 'c':
 135                         f_mode = MODE_SCRIPT;
 136                         fp = stdin;
 137                         break;
 138                 case 'e':
 139                         if (fp != stdin) {
 140                                 err(-1, "only one -f/-e option is accepted");
 141                         }
 142                         f_mode = MODE_SCRIPT;
 143                         fp = fmemopen(optarg, strlen(optarg), "r");
 144                         if (fp == NULL) {
 145                                 err(-1, "fmemopen");
 146                                 /*NOTREACHED*/
 147                         }
 148                         break;
 149                 case 'f':
 150                         if (fp != stdin) {
 151                                 err(-1, "only one -f/-e option is accepted");
 152                         }
 153                         f_mode = MODE_SCRIPT;
 154                         if ((fp = fopen(optarg, "r")) == NULL) {
 155                                 err(-1, "fopen");
 156                                 /*NOTREACHED*/
 157                         }
 158                         break;
 159                 case 'D':
 160                         f_mode = MODE_CMDDUMP;
 161                         break;
 162                 case 'F':
 163                         f_mode = MODE_CMDFLUSH;
 164                         break;
 165                 case 'a':
 166                         f_all = 1;
 167                         break;
 168                 case 'l':
 169                         f_forever = 1;
 170                         break;
 171                 case 'h':
 172                         f_hexdump = 1;
 173                         break;
 174                 case 'x':
 175                         f_mode = MODE_PROMISC;
 176                         f_tflag++;
 177                         break;
 178                 case 'P':
 179                         f_policy = 1;
 180                         break;
 181                 case 'g': /* global */
 182                         f_scope |= IPSEC_POLICYSCOPE_GLOBAL;
 183                         break;
 184                 case 't': /* tunnel */
 185                         f_scope |= IPSEC_POLICYSCOPE_IFNET;
 186                         break;
 187                 case 'v':
 188                         f_verbose = 1;
 189                         break;
 190                 default:
 191                         usage();
 192                         /*NOTREACHED*/
 193                 }
 194         }
 195
 196         modload("ipsec");
 197         so = pfkey_open();
 198         if (so < 0) {
 199                 perror("pfkey_open");
 200                 exit(1);
 201         }
 202
 203         switch (f_mode) {
 204         case MODE_CMDDUMP:
 205                 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP,
 206                     f_policy ? f_scope: SADB_SATYPE_UNSPEC);
 207                 break;
 208         case MODE_CMDFLUSH:
 209                 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH,
 210                     SADB_SATYPE_UNSPEC);
 211                 break;
 212         case MODE_SCRIPT:
 213                 if (get_supported() < 0) {
 214                         errx(-1, "%s", ipsec_strerror());
 215                         /*NOTREACHED*/
 216                 }
 217                 if (parse(&fp))
 218                         exit (1);
 219                 break;
 220         case MODE_PROMISC:
 221                 promisc();
 222                 /*NOTREACHED*/
 223         default:
 224                 usage();
 225                 /*NOTREACHED*/
 226         }
 227
 228         exit(0);
 229 }
 230
 231 int
 232 get_supported(void)
 233 {
 234
 235         if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
 236                 return -1;
 237
 238         if (pfkey_recv_register(so) < 0)
 239                 return -1;
 240
 241         return 0;
 242 }
 243
 244 void
 245 sendkeyshort(u_int type, uint8_t satype)
 246 {
 247         struct sadb_msg msg;
 248
 249         msg.sadb_msg_version = PF_KEY_V2;
 250         msg.sadb_msg_type = type;
 251         msg.sadb_msg_errno = 0;
 252         msg.sadb_msg_satype = satype;
 253         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 254         msg.sadb_msg_reserved = 0;
 255         msg.sadb_msg_seq = 0;
 256         msg.sadb_msg_pid = getpid();
 257
 258         sendkeymsg((char *)&msg, sizeof(msg));
 259
 260         return;
 261 }
 262
 263 void
 264 promisc(void)
 265 {
 266         struct sadb_msg msg;
 267         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 268         ssize_t l;
 269
 270         msg.sadb_msg_version = PF_KEY_V2;
 271         msg.sadb_msg_type = SADB_X_PROMISC;
 272         msg.sadb_msg_errno = 0;
 273         msg.sadb_msg_satype = 1;
 274         msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
 275         msg.sadb_msg_reserved = 0;
 276         msg.sadb_msg_seq = 0;
 277         msg.sadb_msg_pid = getpid();
 278
 279         if ((l = send(so, &msg, sizeof(msg), 0)) < 0) {
 280                 err(1, "send");
 281                 /*NOTREACHED*/
 282         }
 283
 284         while (1) {
 285                 struct sadb_msg *base;
 286
 287                 if ((l = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
 288                         err(1, "recv");
 289                         /*NOTREACHED*/
 290                 }
 291
 292                 if (l != sizeof(*base))
 293                         continue;
 294
 295                 base = (struct sadb_msg *)rbuf;
 296                 if ((l = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
 297                                 0)) < 0) {
 298                         err(1, "recv");
 299                         /*NOTREACHED*/
 300                 }
 301                 printdate();
 302                 if (f_hexdump) {
 303                         int i;
 304                         for (i = 0; i < l; i++) {
 305                                 if (i % 16 == 0)
 306                                         printf("%08x: ", i);
 307                                 printf("%02x ", rbuf[i] & 0xff);
 308                                 if (i % 16 == 15)
 309                                         printf("\n");
 310                         }
 311                         if (l % 16)
 312                                 printf("\n");
 313                 }
 314                 /* adjust base pointer for promisc mode */
 315                 if (base->sadb_msg_type == SADB_X_PROMISC) {
 316                         if ((ssize_t)sizeof(*base) < l)
 317                                 base++;
 318                         else
 319                                 base = NULL;
 320                 }
 321                 if (base) {
 322                         kdebug_sadb(base);
 323                         printf("\n");
 324                         fflush(stdout);
 325                 }
 326         }
 327 }
 328
 329 int
 330 sendkeymsg(char *buf, size_t len)
 331 {
 332         u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
 333         ssize_t l;
 334         struct sadb_msg *msg;
 335
 336     {
 337         struct timeval tv;
 338         tv.tv_sec = 1;
 339         tv.tv_usec = 0;
 340         if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
 341                 perror("setsockopt");
 342                 goto end;
 343         }
 344     }
 345
 346         if (f_forever)
 347                 shortdump_hdr();
 348 again:
 349         if (f_verbose) {
 350                 kdebug_sadb((struct sadb_msg *)buf);
 351                 printf("\n");
 352         }
 353         if (f_hexdump) {
 354                 size_t i;
 355                 for (i = 0; i < len; i++) {
 356                         if (i % 16 == 0)
 357                                 printf("%08x: ", (u_int)i);
 358                         printf("%02x ", buf[i] & 0xff);
 359                         if (i % 16 == 15)
 360                                 printf("\n");
 361                 }
 362                 if (len % 16)
 363                         printf("\n");
 364         }
 365
 366         if ((l = send(so, buf, len, 0)) < 0) {
 367                 perror("send");
 368                 goto end;
 369         }
 370
 371         msg = (struct sadb_msg *)rbuf;
 372         do {
 373                 if ((l = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
 374                         perror("recv");
 375                         goto end;
 376                 }
 377
 378                 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != l) {
 379                         warnx("invalid keymsg length");
 380                         break;
 381                 }
 382
 383                 if (f_verbose) {
 384                         kdebug_sadb((struct sadb_msg *)rbuf);
 385                         printf("\n");
 386                 }
 387                 if (postproc(msg) < 0)
 388                         break;
 389         } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
 390
 391         if (f_forever) {
 392                 fflush(stdout);
 393                 sleep(1);
 394                 goto again;
 395         }
 396
 397 end:
 398         return(0);
 399 }
 400
 401 int
 402 postproc(struct sadb_msg *msg)
 403 {
 404
 405         if (msg->sadb_msg_errno != 0) {
 406                 char inf[80];
 407                 const char *errmsg = NULL;
 408
 409                 if (f_mode == MODE_SCRIPT)
 410                         snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
 411                 else
 412                         inf[0] = '\0';
 413
 414                 switch (msg->sadb_msg_errno) {
 415                 case ENOENT:
 416                         switch (msg->sadb_msg_type) {
 417                         case SADB_DELETE:
 418                         case SADB_GET:
 419                         case SADB_X_SPDDELETE:
 420                                 errmsg = "No entry";
 421                                 break;
 422                         case SADB_DUMP:
 423                                 errmsg = "No SAD entries";
 424                                 break;
 425                         case SADB_X_SPDDUMP:
 426                                 errmsg = "No SPD entries";
 427                                 break;
 428                         }
 429                         break;
 430                 default:
 431                         errmsg = strerror(msg->sadb_msg_errno);
 432                 }
 433                 printf("%s%s.\n", inf, errmsg);
 434                 return(-1);
 435         }
 436
 437         switch (msg->sadb_msg_type) {
 438         case SADB_GET:
 439                 pfkey_sadump(msg);
 440                 break;
 441
 442         case SADB_DUMP:
 443                 /* filter out DEAD SAs */
 444                 if (!f_all) {
 445                         caddr_t mhp[SADB_EXT_MAX + 1];
 446                         struct sadb_sa *sa;
 447                         pfkey_align(msg, mhp);
 448                         pfkey_check(mhp);
 449                         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 450                                 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
 451                                         break;
 452                         }
 453                 }
 454                 if (f_forever)
 455                         shortdump(msg);
 456                 else
 457                         pfkey_sadump(msg);
 458                 msg = (struct sadb_msg *)((caddr_t)msg +
 459                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 460                 if (f_verbose) {
 461                         kdebug_sadb((struct sadb_msg *)msg);
 462                         printf("\n");
 463                 }
 464                 break;
 465
 466         case SADB_X_SPDDUMP:
 467                 pfkey_spdump(msg);
 468                 if (msg->sadb_msg_seq == 0) break;
 469                 msg = (struct sadb_msg *)((caddr_t)msg +
 470                                      PFKEY_UNUNIT64(msg->sadb_msg_len));
 471                 if (f_verbose) {
 472                         kdebug_sadb((struct sadb_msg *)msg);
 473                         printf("\n");
 474                 }
 475                 break;
 476         }
 477
 478         return(0);
 479 }
 480
 481 /*------------------------------------------------------------*/
 482 static const char *satype[] = {
 483         NULL, NULL, "ah", "esp"
 484 };
 485 static const char *sastate[] = {
 486         "L", "M", "D", "d"
 487 };
 488 static const char *ipproto[] = {
 489 /*0*/   "ip", "icmp", "igmp", "ggp", "ip4",
 490         NULL, "tcp", NULL, "egp", NULL,
 491 /*10*/  NULL, NULL, NULL, NULL, NULL,
 492         NULL, NULL, "udp", NULL, NULL,
 493 /*20*/  NULL, NULL, "idp", NULL, NULL,
 494         NULL, NULL, NULL, NULL, "tp",
 495 /*30*/  NULL, NULL, NULL, NULL, NULL,
 496         NULL, NULL, NULL, NULL, NULL,
 497 /*40*/  NULL, "ip6", NULL, "rt6", "frag6",
 498         NULL, "rsvp", "gre", NULL, NULL,
 499 /*50*/  "esp", "ah", NULL, NULL, NULL,
 500         NULL, NULL, NULL, "icmp6", "none",
 501 /*60*/  "dst6",
 502 };
 503
 504 #define STR_OR_ID(x, tab) \
 505         (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
 506
 507 const char *
 508 numstr(int x)
 509 {
 510         static char buf[20];
 511         snprintf(buf, sizeof(buf), "#%d", x);
 512         return buf;
 513 }
 514
 515 void
 516 shortdump_hdr(void)
 517 {
 518         printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
 519                 "time", "p", "s", "spi", "ltime", "src", "dst");
 520 }
 521
 522 void
 523 shortdump(struct sadb_msg *msg)
 524 {
 525         caddr_t mhp[SADB_EXT_MAX + 1];
 526         char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
 527         struct sadb_sa *sa;
 528         struct sadb_address *saddr;
 529         struct sadb_lifetime *lts, *lth, *ltc;
 530         struct sockaddr *s;
 531         u_int t;
 532         time_t cur = time(0);
 533
 534         pfkey_align(msg, mhp);
 535         pfkey_check(mhp);
 536
 537         printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
 538
 539         printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
 540
 541         if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
 542                 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
 543                 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
 544         } else
 545                 printf("%-1s %-8s", "?", "?");
 546
 547         lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
 548         lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
 549         ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
 550         if (lts && lth && ltc) {
 551                 if (ltc->sadb_lifetime_addtime == 0)
 552                         t = (u_long)0;
 553                 else
 554                         t = (u_long)(cur - ltc->sadb_lifetime_addtime);
 555                 if (t >= 1000)
 556                         strlcpy(buf, " big/", sizeof(buf));
 557                 else
 558                         snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
 559                 printf("%s", buf);
 560
 561                 t = (u_long)lth->sadb_lifetime_addtime;
 562                 if (t >= 1000)
 563                         strlcpy(buf, "big", sizeof(buf));
 564                 else
 565                         snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
 566                 printf("%s", buf);
 567         } else
 568                 printf(" ??\?/???");    /* backslash to avoid trigraph ??/ */
 569
 570         printf(" ");
 571
 572         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
 573                 if (saddr->sadb_address_proto)
 574                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 575                 s = (struct sockaddr *)(saddr + 1);
 576                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 577                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 578                 if (strcmp(pbuf, "0") != 0)
 579                         printf("%s[%s]", buf, pbuf);
 580                 else
 581                         printf("%s", buf);
 582         } else
 583                 printf("?");
 584
 585         printf(" -> ");
 586
 587         if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
 588                 if (saddr->sadb_address_proto)
 589                         printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
 590
 591                 s = (struct sockaddr *)(saddr + 1);
 592                 getnameinfo(s, s->sa_len, buf, sizeof(buf),
 593                         pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
 594                 if (strcmp(pbuf, "0") != 0)
 595                         printf("%s[%s]", buf, pbuf);
 596                 else
 597                         printf("%s", buf);
 598         } else
 599                 printf("?");
 600
 601         printf("\n");
 602 }
 603
 604 /* From: tcpdump(1):gmt2local.c and util.c */
 605 /*
 606  * Print the timestamp
 607  */
 608 static void
 609 printdate(void)
 610 {
 611         struct timeval tp;
 612         int s;
 613
 614         if (gettimeofday(&tp, NULL) == -1) {
 615                 perror("gettimeofday");
 616                 return;
 617         }
 618
 619         if (f_tflag == 1) {
 620                 /* Default */
 621                 s = (tp.tv_sec + thiszone ) % 86400;
 622                 (void)printf("%02d:%02d:%02d.%06u ",
 623                     s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
 624         } else if (f_tflag > 1) {
 625                 /* Unix timeval style */
 626                 (void)printf("%u.%06u ",
 627                     (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
 628         }
 629
 630         printf("\n");
 631 }
 632
 633 /*
 634  * Returns the difference between gmt and local time in seconds.
 635  * Use gmtime() and localtime() to keep things simple.
 636  */
 637 int32_t
 638 gmt2local(time_t t)
 639 {
 640         register int dt, dir;
 641         register struct tm *gmt, *loc;
 642         struct tm sgmt;
 643
 644         if (t == 0)
 645                 t = time(NULL);
 646         gmt = &sgmt;
 647         *gmt = *gmtime(&t);
 648         loc = localtime(&t);
 649         dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
 650             (loc->tm_min - gmt->tm_min) * 60;
 651
 652         /*
 653          * If the year or julian day is different, we span 00:00 GMT
 654          * and must add or subtract a day. Check the year first to
 655          * avoid problems when the julian day wraps.
 656          */
 657         dir = loc->tm_year - gmt->tm_year;
 658         if (dir == 0)
 659                 dir = loc->tm_yday - gmt->tm_yday;
 660         dt += dir * 24 * 60 * 60;
 661
 662         return (dt);
 663 }