src/main/radmin.c

   1 /*
   2  * radmin.c     RADIUS Administration tool.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2008   The FreeRADIUS server project
  21  * Copyright 2008   Alan DeKok <aland@deployingradius.com>
  22  */
  23
  24 #include <freeradius-devel/ident.h>
  25 RCSID("$Id$")
  26
  27 #include <freeradius-devel/radiusd.h>
  28 #include <freeradius-devel/radpaths.h>
  29
  30 #ifdef HAVE_SYS_SOCKET_H
  31 #include <sys/socket.h>
  32 #endif
  33
  34 #ifdef HAVE_NETINET_IN_H
  35 #include <netinet/in.h>
  36 #endif
  37
  38 #ifdef HAVE_SYS_UN_H
  39 #include <sys/un.h>
  40 #ifndef SUN_LEN
  41 #define SUN_LEN(su)  (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
  42 #endif
  43 #endif
  44
  45 #ifdef HAVE_GETOPT_H
  46 #include <getopt.h>
  47 #endif
  48
  49 #ifdef HAVE_SYS_STAT_H
  50 #include <sys/stat.h>
  51 #endif
  52
  53 #ifdef HAVE_LIBREADLINE
  54
  55 #if defined(HAVE_READLINE_READLINE_H)
  56 #include <readline/readline.h>
  57 #define USE_READLINE (1)
  58 #elif defined(HAVE_READLINE_H)
  59 #include <readline.h>
  60 #define USE_READLINE (1)
  61 #endif /* !defined(HAVE_READLINE_H) */
  62
  63 #endif /* HAVE_LIBREADLINE */
  64
  65 #ifdef HAVE_READLINE_HISTORY
  66 #if defined(HAVE_READLINE_HISTORY_H)
  67 #include <readline/history.h>
  68 #define USE_READLINE_HISTORY (1)
  69 #elif defined(HAVE_HISTORY_H)
  70 #include <history.h>
  71 #define USE_READLINE_HISTORY (1)
  72 #endif /* defined(HAVE_READLINE_HISTORY_H) */
  73
  74 #endif /* HAVE_READLINE_HISTORY */
  75
  76 /*
  77  *      For configuration file stuff.
  78  */
  79 char *radius_dir = RADDBDIR;
  80 const char *progname = "radmin";
  81
  82 /*
  83  *      The rest of this is because the conffile.c, etc. assume
  84  *      they're running inside of the server.  And we don't (yet)
  85  *      have a "libfreeradius-server", or "libfreeradius-util".
  86  */
  87 int debug_flag = 0;
  88 struct main_config_t mainconfig;
  89 char *request_log_file = NULL;
  90 char *debug_log_file = NULL;
  91 int radius_xlat(UNUSED char *out, UNUSED int outlen, UNUSED const char *fmt,
  92                 UNUSED REQUEST *request, UNUSED RADIUS_ESCAPE_STRING func)
  93 {
  94         return -1;
  95 }
  96 int check_config = FALSE;
  97
  98 static FILE *outputfp = NULL;
  99 static int echo = FALSE;
 100 static const char *secret = "testing123";
 101
 102 static int fr_domain_socket(const char *path)
 103 {
 104         int sockfd = -1;
 105 #ifdef HAVE_SYS_UN_H
 106         size_t len;
 107         socklen_t socklen;
 108         struct sockaddr_un saremote;
 109
 110         len = strlen(path);
 111         if (len >= sizeof(saremote.sun_path)) {
 112                 fprintf(stderr, "%s: Path too long in filename\n", progname);
 113                 return -1;
 114         }
 115
 116         if ((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
 117                 fprintf(stderr, "%s: Failed creating socket: %s\n",
 118                         progname, strerror(errno));
 119                 return -1;
 120         }
 121
 122         saremote.sun_family = AF_UNIX;
 123         memcpy(saremote.sun_path, path, len + 1); /* SUN_LEN does strlen */
 124
 125         socklen = SUN_LEN(&saremote);
 126
 127         if (connect(sockfd, (struct sockaddr *)&saremote, socklen) < 0) {
 128                 struct stat buf;
 129
 130                 close(sockfd);
 131                 fprintf(stderr, "%s: Failed connecting to %s: %s\n",
 132                         progname, path, strerror(errno));
 133
 134                 /*
 135                  *      The file doesn't exist.  Tell the user how to
 136                  *      fix it.
 137                  */
 138                 if ((stat(path, &buf) < 0) &&
 139                     (errno == ENOENT)) {
 140                         fprintf(stderr, "  Perhaps you need to run the commands:\n\tcd /etc/raddb\n\tln -s sites-available/control-socket sites-enabled/control-socket\n  and then re-start the server?\n");
 141                 }
 142
 143                 return -1;
 144         }
 145
 146 #ifdef O_NONBLOCK
 147         {
 148                 int flags;
 149
 150                 if ((flags = fcntl(sockfd, F_GETFL, NULL)) < 0)  {
 151                         fprintf(stderr, "%s: Failure getting socket flags: %s",
 152                                 progname, strerror(errno));
 153                         close(sockfd);
 154                         return -1;
 155                 }
 156
 157                 flags |= O_NONBLOCK;
 158                 if( fcntl(sockfd, F_SETFL, flags) < 0) {
 159                         fprintf(stderr, "%s: Failure setting socket flags: %s",
 160                                 progname, strerror(errno));
 161                         close(sockfd);
 162                         return -1;
 163                 }
 164         }
 165 #endif
 166 #endif
 167         return sockfd;
 168 }
 169
 170 static int client_socket(const char *server)
 171 {
 172         int sockfd, port;
 173         fr_ipaddr_t ipaddr;
 174         char *p, buffer[1024];
 175
 176         strlcpy(buffer, server, sizeof(buffer));
 177
 178         p = strchr(buffer, ':');
 179         if (!p) {
 180                 port = PW_RADMIN_PORT;
 181         } else {
 182                 port = atoi(p + 1);
 183                 *p = '\0';
 184         }
 185
 186         if (ip_hton(buffer, AF_INET, &ipaddr) < 0) {
 187                 fprintf(stderr, "%s: Failed looking up host %s: %s\n",
 188                         progname, buffer, strerror(errno));
 189                 exit(1);
 190         }
 191
 192         sockfd = fr_tcp_client_socket(NULL, &ipaddr, port);
 193         if (sockfd < 0) {
 194                 fprintf(stderr, "%s: Failed opening socket %s: %s\n",
 195                         progname, server, strerror(errno));
 196                 exit(1);
 197         }
 198
 199         return sockfd;
 200 }
 201
 202 static void do_challenge(int sockfd)
 203 {
 204         ssize_t total, r;
 205         uint8_t challenge[16];
 206
 207         for (total = 0; total < sizeof(challenge); ) {
 208                 r = read(sockfd, challenge + total, sizeof(challenge) - total);
 209                 if (r == 0) exit(1);
 210
 211                 if (r < 0) {
 212 #ifdef ECONNRESET
 213                         if (errno == ECONNRESET) {
 214                                 fprintf(stderr, "%s: Connection reset",
 215                                         progname);
 216                                 exit(1);
 217                         }
 218 #endif
 219                         if (errno == EINTR) continue;
 220
 221                         fprintf(stderr, "%s: Failed reading data: %s\n",
 222                                 progname, strerror(errno));
 223                         exit(1);
 224                 }
 225                 total += r;
 226                 fflush(stdout);
 227         }
 228
 229         fr_hmac_md5(secret, strlen(secret), challenge, sizeof(challenge),
 230                     challenge);
 231
 232         write(sockfd, challenge, sizeof(challenge));
 233 }
 234
 235
 236 static int usage(void)
 237 {
 238         printf("Usage: %s [ args ]\n", progname);
 239         printf("  -d raddb_dir    Configuration files are in \"raddbdir/*\".\n");
 240         printf("  -e command      Execute 'command' and then exit.\n");
 241         printf("  -E              Echo commands as they are being executed.\n");
 242         printf("  -f socket_file  Open socket_file directly, without reading radius.conf\n");
 243         printf("  -h              Print usage help information.\n");
 244         printf("  -i input_file   Read commands from 'input_file'.\n");
 245         printf("  -n name         Read raddb/name.conf instead of raddb/radiusd.conf\n");
 246         printf("  -o output_file  Write commands to 'output_file'.\n");
 247         printf("  -q              Quiet mode.\n");
 248
 249         exit(1);
 250 }
 251
 252 static ssize_t run_command(int sockfd, const char *command,
 253                            char *buffer, size_t bufsize)
 254 {
 255         char *p;
 256         ssize_t size, len;
 257
 258         if (echo) {
 259                 fprintf(outputfp, "%s\n", command);
 260         }
 261
 262         /*
 263          *      Write the text to the socket.
 264          */
 265         if (write(sockfd, command, strlen(command)) < 0) return -1;
 266         if (write(sockfd, "\r\n", 2) < 0) return -1;
 267
 268         /*
 269          *      Read the response
 270          */
 271         size = 0;
 272         buffer[0] = '\0';
 273
 274         memset(buffer, 0, bufsize);
 275
 276         while (1) {
 277                 int rcode;
 278                 fd_set readfds;
 279
 280                 FD_ZERO(&readfds);
 281                 FD_SET(sockfd, &readfds);
 282
 283                 rcode = select(sockfd + 1, &readfds, NULL, NULL, NULL);
 284                 if (rcode < 0) {
 285                         if (errno == EINTR) continue;
 286
 287                         fprintf(stderr, "%s: Failed selecting: %s\n",
 288                                 progname, strerror(errno));
 289                         exit(1);
 290                 }
 291
 292                 if (rcode == 0) {
 293                         fprintf(stderr, "%s: Server closed the connection.\n",
 294                                 progname);
 295                         exit(1);
 296                 }
 297
 298 #ifdef MSG_DONTWAIT
 299                 len = recv(sockfd, buffer + size,
 300                            bufsize - size - 1, MSG_DONTWAIT);
 301 #else
 302                 /*
 303                  *      Read one byte at a time (ugh)
 304                  */
 305                 len = recv(sockfd, buffer + size, 1, 0);
 306 #endif
 307                 if (len < 0) {
 308                         /*
 309                          *      No data: keep looping
 310                          */
 311                         if ((errno == EAGAIN) || (errno == EINTR)) {
 312                                 continue;
 313                         }
 314
 315                         fprintf(stderr, "%s: Error reading socket: %s\n",
 316                                 progname, strerror(errno));
 317                         exit(1);
 318                 }
 319                 if (len == 0) return 0; /* clean exit */
 320
 321                 size += len;
 322                 buffer[size] = '\0';
 323
 324                 /*
 325                  *      There really is a better way of doing this.
 326                  */
 327                 p = strstr(buffer, "radmin> ");
 328                 if (p &&
 329                     ((p == buffer) ||
 330                      (p[-1] == '\n') ||
 331                      (p[-1] == '\r'))) {
 332                         *p = '\0';
 333
 334                         if (p[-1] == '\n') p[-1] = '\0';
 335                         break;
 336                 }
 337         }
 338
 339         /*
 340          *      Blank prompt.  Go get another command.
 341          */
 342         if (!buffer[0]) return 1;
 343
 344         buffer[size] = '\0'; /* this is at least right */
 345
 346         return 2;
 347 }
 348
 349 #define MAX_COMMANDS (4)
 350
 351 int main(int argc, char **argv)
 352 {
 353         int argval, quiet = 0;
 354         int done_license = 0;
 355         int sockfd;
 356         uint32_t magic, needed;
 357         char *line = NULL;
 358         ssize_t len, size;
 359         const char *file = NULL;
 360         const char *name = "radiusd";
 361         char *p, buffer[65536];
 362         const char *input_file = NULL;
 363         FILE *inputfp = stdin;
 364         const char *output_file = NULL;
 365         const char *server = NULL;
 366
 367         char *commands[MAX_COMMANDS];
 368         int num_commands = -1;
 369
 370         outputfp = stdout;      /* stdout is not a constant value... */
 371
 372         if ((progname = strrchr(argv[0], FR_DIR_SEP)) == NULL)
 373                 progname = argv[0];
 374         else
 375                 progname++;
 376
 377         while ((argval = getopt(argc, argv, "d:hi:e:Ef:n:o:qs:S")) != EOF) {
 378                 switch(argval) {
 379                 case 'd':
 380                         if (file) {
 381                                 fprintf(stderr, "%s: -d and -f cannot be used together.\n", progname);
 382                                 exit(1);
 383                         }
 384                         if (server) {
 385                                 fprintf(stderr, "%s: -d and -s cannot be used together.\n", progname);
 386                                 exit(1);
 387                         }
 388                         radius_dir = optarg;
 389                         break;
 390
 391                 case 'e':
 392                         num_commands++; /* starts at -1 */
 393                         if (num_commands >= MAX_COMMANDS) {
 394                                 fprintf(stderr, "%s: Too many '-e'\n",
 395                                         progname);
 396                                 exit(1);
 397                         }
 398                         commands[num_commands] = optarg;
 399                         break;
 400
 401                 case 'E':
 402                         echo = TRUE;
 403                         break;
 404
 405                 case 'f':
 406                         radius_dir = NULL;
 407                         file = optarg;
 408                         break;
 409
 410                 default:
 411                 case 'h':
 412                         usage();
 413                         break;
 414
 415                 case 'i':
 416                         if (strcmp(optarg, "-") != 0) {
 417                                 input_file = optarg;
 418                         }
 419                         quiet = 1;
 420                         break;
 421
 422                 case 'n':
 423                         name = optarg;
 424                         break;
 425
 426                 case 'o':
 427                         if (strcmp(optarg, "-") != 0) {
 428                                 output_file = optarg;
 429                         }
 430                         quiet = 1;
 431                         break;
 432
 433                 case 'q':
 434                         quiet = 1;
 435                         break;
 436
 437                 case 's':
 438                         if (file) {
 439                                 fprintf(stderr, "%s: -s and -f cannot be used together.\n", progname);
 440                                 exit(1);
 441                         }
 442                         radius_dir = NULL;
 443                         server = optarg;
 444                         break;
 445
 446                 case 'S':
 447                         secret = NULL;
 448                         break;
 449                 }
 450         }
 451
 452         if (radius_dir) {
 453                 int rcode;
 454                 CONF_SECTION *cs, *subcs;
 455
 456                 file = NULL;    /* MUST read it from the conffile now */
 457
 458                 snprintf(buffer, sizeof(buffer), "%s/%s.conf",
 459                          radius_dir, name);
 460
 461                 cs = cf_file_read(buffer);
 462                 if (!cs) {
 463                         fprintf(stderr, "%s: Errors reading %s\n",
 464                                 progname, buffer);
 465                         exit(1);
 466                 }
 467
 468                 subcs = NULL;
 469                 while ((subcs = cf_subsection_find_next(cs, subcs, "listen")) != NULL) {
 470                         const char *value;
 471                         CONF_PAIR *cp = cf_pair_find(subcs, "type");
 472
 473                         if (!cp) continue;
 474
 475                         value = cf_pair_value(cp);
 476                         if (!value) continue;
 477
 478                         if (strcmp(value, "control") != 0) continue;
 479
 480                         /*
 481                          *      Now find the socket name (sigh)
 482                          */
 483                         rcode = cf_item_parse(subcs, "socket",
 484                                               PW_TYPE_STRING_PTR,
 485                                               &file, NULL);
 486                         if (rcode < 0) {
 487                                 fprintf(stderr, "%s: Failed parsing listen section\n", progname);
 488                                 exit(1);
 489                         }
 490
 491                         if (!file) {
 492                                 fprintf(stderr, "%s: No path given for socket\n",
 493                                         progname);
 494                                 exit(1);
 495                         }
 496                         break;
 497                 }
 498
 499                 if (!file) {
 500                         fprintf(stderr, "%s: Could not find control socket in %s\n",
 501                                 progname, buffer);
 502                         exit(1);
 503                 }
 504         }
 505
 506         if (input_file) {
 507                 inputfp = fopen(input_file, "r");
 508                 if (!inputfp) {
 509                         fprintf(stderr, "%s: Failed opening %s: %s\n",
 510                                 progname, input_file, strerror(errno));
 511                         exit(1);
 512                 }
 513         }
 514
 515         if (output_file) {
 516                 outputfp = fopen(output_file, "w");
 517                 if (!outputfp) {
 518                         fprintf(stderr, "%s: Failed creating %s: %s\n",
 519                                 progname, output_file, strerror(errno));
 520                         exit(1);
 521                 }
 522         }
 523
 524         /*
 525          *      Check if stdin is a TTY only if input is from stdin
 526          */
 527         if (input_file && !quiet && !isatty(STDIN_FILENO)) quiet = 1;
 528
 529 #ifdef USE_READLINE
 530         if (!quiet) {
 531 #ifdef USE_READLINE_HISTORY
 532                 using_history();
 533 #endif
 534                 rl_bind_key('\t', rl_insert);
 535         }
 536 #endif
 537
 538  reconnect:
 539         if (file) {
 540                 /*
 541                  *      FIXME: Get destination from command line, if possible?
 542                  */
 543                 sockfd = fr_domain_socket(file);
 544                 if (sockfd < 0) {
 545                         exit(1);
 546                 }
 547         } else {
 548                 sockfd = client_socket(server);
 549         }
 550
 551         /*
 552          *      Read initial magic && version information.
 553          */
 554         for (size = 0; size < 8; size += len) {
 555                 len = read(sockfd, buffer + size, 8 - size);
 556                 if (len < 0) {
 557                         fprintf(stderr, "%s: Error reading initial data from socket: %s\n",
 558                                 progname, strerror(errno));
 559                         exit(1);
 560                 }
 561         }
 562
 563         memcpy(&magic, buffer, 4);
 564         magic = ntohl(magic);
 565         if (magic != 0xf7eead15) {
 566                 fprintf(stderr, "%s: Socket %s is not FreeRADIUS administration socket\n", progname, file);
 567                 exit(1);
 568         }
 569
 570         memcpy(&magic, buffer + 4, 4);
 571         magic = ntohl(magic);
 572
 573         if (!server) {
 574                 needed = 1;
 575         } else {
 576                 needed = 2;
 577         }
 578
 579         if (magic != needed) {
 580                 fprintf(stderr, "%s: Socket version mismatch: Need %d, got %d\n",
 581                         progname, needed, magic);
 582                 exit(1);
 583         }
 584
 585         if (server && secret) do_challenge(sockfd);
 586
 587         /*
 588          *      Run one command.
 589          */
 590         if (num_commands >= 0) {
 591                 int i;
 592
 593                 for (i = 0; i <= num_commands; i++) {
 594                         size = run_command(sockfd, commands[i],
 595                                            buffer, sizeof(buffer));
 596                         if (size < 0) exit(1);
 597
 598                         if (buffer[0]) {
 599                                 fputs(buffer, outputfp);
 600                                 fprintf(outputfp, "\n");
 601                                 fflush(outputfp);
 602                         }
 603                 }
 604                 exit(0);
 605         }
 606
 607         if (!done_license && !quiet) {
 608                 printf("radmin " RADIUSD_VERSION " - FreeRADIUS Server administration tool.\n");
 609                 printf("Copyright (C) 2008-2011 The FreeRADIUS server project and contributors.\n");
 610                 printf("There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n");
 611                 printf("PARTICULAR PURPOSE.\n");
 612                 printf("You may redistribute copies of FreeRADIUS under the terms of the\n");
 613                 printf("GNU General Public License v2.\n");
 614
 615                 done_license = 1;
 616         }
 617
 618         /*
 619          *      FIXME: Do login?
 620          */
 621
 622         while (1) {
 623 #ifndef USE_READLINE
 624                 if (!quiet) {
 625                         printf("radmin> ");
 626                         fflush(stdout);
 627                 }
 628 #else
 629                 if (!quiet) {
 630                         line = readline("radmin> ");
 631
 632                         if (!line) break;
 633
 634                         if (!*line) {
 635                                 free(line);
 636                                 continue;
 637                         }
 638
 639 #ifdef USE_READLINE_HISTORY
 640                         add_history(line);
 641 #endif
 642                 } else          /* quiet, or no readline */
 643 #endif
 644                 {
 645                         line = fgets(buffer, sizeof(buffer), inputfp);
 646                         if (!line) break;
 647
 648                         p = strchr(buffer, '\n');
 649                         if (!p) {
 650                                 fprintf(stderr, "%s: Input line too long\n",
 651                                         progname);
 652                                 exit(1);
 653                         }
 654
 655                         *p = '\0';
 656
 657                         /*
 658                          *      Strip off leading spaces.
 659                          */
 660                         for (p = line; *p != '\0'; p++) {
 661                                 if ((p[0] == ' ') ||
 662                                     (p[0] == '\t')) {
 663                                         line = p + 1;
 664                                         continue;
 665                                 }
 666
 667                                 if (p[0] == '#') {
 668                                         line = NULL;
 669                                         break;
 670                                 }
 671
 672                                 break;
 673                         }
 674
 675                         /*
 676                          *      Comments: keep going.
 677                          */
 678                         if (!line) continue;
 679
 680                         /*
 681                          *      Strip off CR / LF
 682                          */
 683                         for (p = line; *p != '\0'; p++) {
 684                                 if ((p[0] == '\r') ||
 685                                     (p[0] == '\n')) {
 686                                         p[0] = '\0';
 687                                         break;
 688                                 }
 689                         }
 690                 }
 691
 692                 if (strcmp(line, "reconnect") == 0) {
 693                         close(sockfd);
 694                         line = NULL;
 695                         goto reconnect;
 696                 }
 697
 698                 if (memcmp(line, "secret ", 7) == 0) {
 699                         if (!secret) {
 700                                 secret = line + 7;
 701                                 do_challenge(sockfd);
 702                         }
 703                         line = NULL;
 704                         continue;
 705                 }
 706
 707                 /*
 708                  *      Exit, done, etc.
 709                  */
 710                 if ((strcmp(line, "exit") == 0) ||
 711                     (strcmp(line, "quit") == 0)) {
 712                         break;
 713                 }
 714
 715                 if (server && !secret) {
 716                         fprintf(stderr, "ERROR: You must enter 'secret <SECRET>' before running any commands\n");
 717                         line = NULL;
 718                         continue;
 719                 }
 720
 721                 size = run_command(sockfd, line, buffer, sizeof(buffer));
 722                 if (size <= 0) break; /* error, or clean exit */
 723
 724                 if (size == 1) continue; /* no output. */
 725
 726                 fputs(buffer, outputfp);
 727                 fflush(outputfp);
 728                 fprintf(outputfp, "\n");
 729         }
 730
 731         fprintf(outputfp, "\n");
 732
 733         return 0;
 734 }
 735