src/main/radclient.c

   1 /*
   2  * radclient.c  General radius packet debug 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Copyright 2000  The FreeRADIUS server project
  21  * Copyright 2000  Miquel van Smoorenburg <miquels@cistron.nl>
  22  * Copyright 2000  Alan DeKok <aland@ox.org>
  23  */
  24 static const char rcsid[] = "$Id$";
  25
  26 #include "autoconf.h"
  27 #include "libradius.h"
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31
  32 #if HAVE_UNISTD_H
  33 #       include <unistd.h>
  34 #endif
  35
  36 #include <string.h>
  37 #include <ctype.h>
  38 #include <netdb.h>
  39 #include <sys/socket.h>
  40
  41 #if HAVE_NETINET_IN_H
  42 #       include <netinet/in.h>
  43 #endif
  44
  45 #if HAVE_SYS_SELECT_H
  46 #       include <sys/select.h>
  47 #endif
  48
  49 #if HAVE_GETOPT_H
  50 #       include <getopt.h>
  51 #endif
  52
  53 #include "conf.h"
  54 #include "radpaths.h"
  55 #include "missing.h"
  56
  57 static int retries = 10;
  58 static float timeout = 3;
  59 static const char *secret = NULL;
  60 static int do_output = 1;
  61 static int do_summary = 0;
  62 static int filedone = 0;
  63 static int totalapp = 0;
  64 static int totaldeny = 0;
  65 static char filesecret[256];
  66
  67 /*
  68  *      Read valuepairs from the fp up to End-Of-File.
  69  */
  70 static VALUE_PAIR *readvp(FILE *fp)
  71 {
  72         char buf[8192];
  73         LRAD_TOKEN last_token;
  74         char *p;
  75         VALUE_PAIR *vp;
  76         VALUE_PAIR *list;
  77         int error = 0;
  78
  79         list = NULL;
  80
  81         while (!error && fgets(buf, sizeof(buf), fp) != NULL) {
  82
  83                 p = buf;
  84
  85                 /* If we get a '\n' by itself, we assume that's the end of that VP */
  86                 if((buf[0] == '\n') && (list)) {
  87                         return error ? NULL: list;
  88                 }
  89                 if((buf[0] == '\n') && (!list)) {
  90                         continue;
  91                 } else {
  92                         do {
  93                                 if ((vp = pairread(&p, &last_token)) == NULL) {
  94                                         librad_perror("radclient:");
  95                                         error = 1;
  96                                         break;
  97                                 }
  98                                 pairadd(&list, vp);
  99                         } while (last_token == T_COMMA);
 100                 }
 101         }
 102         filedone = 1;
 103         return error ? NULL: list;
 104 }
 105
 106 static void usage(void)
 107 {
 108         fprintf(stderr, "Usage: radclient [-c count] [-d raddb] [-f file] [-r retries] [-t timeout]\n"
 109                         "[-i id] [-qvxS] server[:port] acct|auth [<secret>]\n");
 110
 111         fprintf(stderr, " -c count    Send each packet 'count' times.\n");
 112         fprintf(stderr, " -d raddb    Set dictionary directory.\n");
 113         fprintf(stderr, " -f file     Read packets from file, not stdin.\n");
 114         fprintf(stderr, " -r retries  If timeout, retry sending the packet 'retires' times.\n");
 115         fprintf(stderr, " -t timeout  Wait 'timeout' seconds before retrying.\n");
 116         fprintf(stderr, " -i id       Set request id to 'id'.  Values may be 0..255\n");
 117         fprintf(stderr, " -S file     read secret from file, not command line.\n");
 118         fprintf(stderr, " -q          Do not print anything out.\n");
 119         fprintf(stderr, " -s          Print out summary information of auth results.\n");
 120         fprintf(stderr, " -v          Show program version information.\n");
 121         fprintf(stderr, " -x          Debugging mode.\n");
 122
 123         exit(1);
 124 }
 125
 126 static int getport(const char *name)
 127 {
 128         struct  servent         *svp;
 129
 130         svp = getservbyname (name, "udp");
 131         if (!svp) {
 132                 return 0;
 133         }
 134
 135         return ntohs(svp->s_port);
 136 }
 137
 138 static int send_packet(RADIUS_PACKET *req, RADIUS_PACKET **rep)
 139 {
 140         int i;
 141         struct timeval  tv;
 142
 143         for (i = 0; i < retries; i++) {
 144                 fd_set          rdfdesc;
 145
 146                 rad_send(req, NULL, secret);
 147
 148                 /* And wait for reply, timing out as necessary */
 149                 FD_ZERO(&rdfdesc);
 150                 FD_SET(req->sockfd, &rdfdesc);
 151
 152                 tv.tv_sec = (int)timeout;
 153                 tv.tv_usec = 1000000 * (timeout - (int)timeout);
 154
 155                 /* Something's wrong if we don't get exactly one fd. */
 156                 if (select(req->sockfd + 1, &rdfdesc, NULL, NULL, &tv) != 1) {
 157                         continue;
 158                 }
 159
 160                 *rep = rad_recv(req->sockfd);
 161                 if (*rep != NULL) {
 162                         break;
 163                 } else {        /* NULL: couldn't receive the packet */
 164                         librad_perror("radclient:");
 165                         exit(1);
 166                 }
 167         }
 168
 169         /* No response or no data read (?) */
 170         if (i == retries) {
 171                 fprintf(stderr, "radclient: no response from server\n");
 172                 exit(1);
 173         }
 174
 175         if (rad_decode(*rep, req, secret) != 0) {
 176                 librad_perror("rad_decode");
 177                 exit(1);
 178         }
 179
 180         /* libradius debug already prints out the value pairs for us */
 181         if (!librad_debug && do_output) {
 182                 printf("Received response ID %d, code %d, length = %d\n",
 183                                 (*rep)->id, (*rep)->code, (*rep)->data_len);
 184                 vp_printlist(stdout, (*rep)->vps);
 185         }
 186         if((*rep)->code == PW_AUTHENTICATION_ACK) {
 187                 totalapp++;
 188         } else {
 189                 totaldeny++;
 190         }
 191
 192         return 0;
 193 }
 194
 195 int main(int argc, char **argv)
 196 {
 197         RADIUS_PACKET *req;
 198         RADIUS_PACKET *rep = NULL;
 199         char *p;
 200         int c;
 201         int port = 0;
 202         const char *radius_dir = RADDBDIR;
 203         char *filename = NULL;
 204         FILE *fp;
 205         int count = 1;
 206         int loop;
 207         char password[256];
 208         VALUE_PAIR *vp;
 209         int id;
 210
 211         id = ((int)getpid() & 0xff);
 212         librad_debug = 0;
 213
 214         while ((c = getopt(argc, argv, "c:d:f:hi:qst:r:S:xv")) != EOF) switch(c) {
 215                 case 'c':
 216                         if (!isdigit(*optarg))
 217                                 usage();
 218                         count = atoi(optarg);
 219                         break;
 220                 case 'd':
 221                         radius_dir = optarg;
 222                         break;
 223                 case 'f':
 224                         filename = optarg;
 225                         break;
 226                 case 'q':
 227                         do_output = 0;
 228                         break;
 229                 case 'x':
 230                         librad_debug++;
 231                         break;
 232                 case 'r':
 233                         if (!isdigit(*optarg))
 234                                 usage();
 235                         retries = atoi(optarg);
 236                         break;
 237                 case 'i':
 238                         if (!isdigit(*optarg))
 239                                 usage();
 240                         id = atoi(optarg);
 241                         if ((id < 0) || (id > 255)) {
 242                                 usage();
 243                         }
 244                         break;
 245                 case 's':
 246                         do_summary = 1;
 247                         break;
 248                 case 't':
 249                         if (!isdigit(*optarg))
 250                                 usage();
 251                         timeout = atof(optarg);
 252                         break;
 253                 case 'v':
 254                         printf("radclient: $Id$ built on " __DATE__ " at " __TIME__ "\n");
 255                         exit(0);
 256                         break;
 257                case 'S':
 258                        fp = fopen(optarg, "r");
 259                        if (!fp) {
 260                                fprintf(stderr, "radclient: Error opening %s: %s\n",
 261                                        optarg, strerror(errno));
 262                                exit(1);
 263                        }
 264                        if (fgets(filesecret, sizeof(filesecret), fp) == NULL) {
 265                                fprintf(stderr, "radclient: Error reading %s: %s\n",
 266                                        optarg, strerror(errno));
 267                                exit(1);
 268                        }
 269                        fclose(fp);
 270
 271                        /* truncate newline */
 272                        p = filesecret + strlen(filesecret) - 1;
 273                        while ((p >= filesecret) &&
 274                               (*p < ' ')) {
 275                                *p = '\0';
 276                                --p;
 277                        }
 278
 279                        if (strlen(filesecret) < 2) {
 280                                fprintf(stderr, "radclient: Secret in %s is too short\n", optarg);
 281                                exit(1);
 282                        }
 283                        secret = filesecret;
 284                        break;
 285                 case 'h':
 286                 default:
 287                         usage();
 288                         break;
 289         }
 290         argc -= (optind - 1);
 291         argv += (optind - 1);
 292
 293         if ((argc < 3)  ||
 294             ((secret == NULL) && (argc < 4))) {
 295                 usage();
 296         }
 297
 298         if (dict_init(radius_dir, RADIUS_DICTIONARY) < 0) {
 299                 librad_perror("radclient");
 300                 return 1;
 301         }
 302
 303         if ((req = rad_alloc(1)) == NULL) {
 304                 librad_perror("radclient");
 305                 exit(1);
 306         }
 307
 308         req->id = id;
 309
 310         /*
 311          *      Strip port from hostname if needed.
 312          */
 313         if ((p = strchr(argv[1], ':')) != NULL) {
 314                 *p++ = 0;
 315                 port = atoi(p);
 316         }
 317
 318         /*
 319          *      See what kind of request we want to send.
 320          */
 321         if (strcmp(argv[2], "auth") == 0) {
 322                 if (port == 0) port = getport("radius");
 323                 if (port == 0) port = PW_AUTH_UDP_PORT;
 324                 req->code = PW_AUTHENTICATION_REQUEST;
 325         } else if (strcmp(argv[2], "acct") == 0) {
 326                 if (port == 0) port = getport("radacct");
 327                 if (port == 0) port = PW_ACCT_UDP_PORT;
 328                 req->code = PW_ACCOUNTING_REQUEST;
 329                 do_summary = 0;
 330         } else if (isdigit(argv[2][0])) {
 331                 if (port == 0) port = getport("radius");
 332                 if (port == 0) port = PW_AUTH_UDP_PORT;
 333                 req->code = atoi(argv[2]);
 334         } else {
 335                 usage();
 336         }
 337
 338         /*
 339          *      Resolve hostname.
 340          */
 341         req->dst_port = port;
 342         req->dst_ipaddr = ip_getaddr(argv[1]);
 343         if (req->dst_ipaddr == INADDR_NONE) {
 344                 librad_perror("radclient: %s: ", argv[1]);
 345                 exit(1);
 346         }
 347
 348         /*
 349          *      Add the secret.
 350          */
 351         if (argv[3]) secret = argv[3];
 352
 353         /*
 354          *      Read valuepairs.
 355          *      Maybe read them, from stdin, if there's no
 356          *      filename, or if the filename is '-'.
 357          */
 358         if (filename && (strcmp(filename, "-") != 0)) {
 359                 fp = fopen(filename, "r");
 360                 if (!fp) {
 361                         fprintf(stderr, "radclient: Error opening %s: %s\n",
 362                                 filename, strerror(errno));
 363                         exit(1);
 364                 }
 365         } else {
 366                 fp = stdin;
 367         }
 368
 369         /*
 370          *      Send request.
 371          */
 372         if ((req->sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
 373                 perror("radclient: socket: ");
 374                 exit(1);
 375         }
 376
 377         while(!filedone) {
 378                 if(req->vps) pairfree(&req->vps);
 379
 380                 if ((req->vps = readvp(fp)) == NULL) {
 381                         break;
 382                 }
 383
 384
 385                 /*
 386                  *      Keep a copy of the the User-Password attribute.
 387                  */
 388                 if ((vp = pairfind(req->vps, PW_PASSWORD)) != NULL) {
 389                         strNcpy(password, (char *)vp->strvalue, sizeof(vp->strvalue));
 390                 /*
 391                  *      Otherwise keep a copy of the CHAP-Password attribute.
 392                  */
 393                 } else if ((vp = pairfind(req->vps, PW_CHAP_PASSWORD)) != NULL) {
 394                         strNcpy(password, (char *)vp->strvalue, sizeof(vp->strvalue));
 395                 } else {
 396                         *password = '\0';
 397                 }
 398
 399                 /*
 400                  *  Fix up Digest-Attributes issues
 401                  */
 402                 for (vp = req->vps; vp != NULL; vp = vp->next) {
 403                   switch (vp->attribute) {
 404                   default:
 405                     break;
 406
 407                   case PW_DIGEST_REALM:
 408                   case PW_DIGEST_NONCE:
 409                   case PW_DIGEST_METHOD:
 410                   case PW_DIGEST_URI:
 411                   case PW_DIGEST_QOP:
 412                   case PW_DIGEST_ALGORITHM:
 413                   case PW_DIGEST_BODY_DIGEST:
 414                   case PW_DIGEST_CNONCE:
 415                   case PW_DIGEST_NONCE_COUNT:
 416                   case PW_DIGEST_USER_NAME:
 417                     /* overlapping! */
 418                     memmove(&vp->strvalue[2], &vp->strvalue[0], vp->length);
 419                     vp->strvalue[0] = vp->attribute - PW_DIGEST_REALM + 1;
 420                     vp->length += 2;
 421                     vp->strvalue[1] = vp->length;
 422                     vp->attribute = PW_DIGEST_ATTRIBUTES;
 423                     break;
 424                   }
 425                 }
 426
 427                 /*
 428                  *      Loop, sending the packet N times.
 429                  */
 430                 for (loop = 0; loop < count; loop++) {
 431                         req->id++;
 432
 433                         /*
 434                          *      If we've already sent a packet, free up the old
 435                          *      one, and ensure that the next packet has a unique
 436                          *      ID and authentication vector.
 437                          */
 438                         if (req->data) {
 439                                 free(req->data);
 440                                 req->data = NULL;
 441                         }
 442
 443                         librad_md5_calc(req->vector, req->vector,
 444                                         sizeof(req->vector));
 445
 446                         if (*password != '\0') {
 447                                 vp = pairfind(req->vps, PW_PASSWORD);
 448                                 if (vp) {
 449                                         strNcpy((char *)vp->strvalue, password, vp->length + 1);
 450                                         vp->length = strlen(password);
 451
 452                                         rad_pwencode((char *)vp->strvalue,
 453                                                      &(vp->length),
 454                                                      secret, (char *)req->vector);
 455                                 } else if ((vp = pairfind(req->vps, PW_CHAP_PASSWORD)) != NULL) {
 456                                         strNcpy((char *)vp->strvalue, password, vp->length + 1);
 457                                         vp->length = strlen(password);
 458
 459                                         rad_chap_encode(req, (char *) vp->strvalue, req->id, vp);
 460                                         vp->length = 17;
 461                                 }
 462                         } /* there WAS a password */
 463                         send_packet(req, &rep);
 464                         rad_free(&rep);
 465                 }
 466         }
 467         if(do_summary) {
 468                 printf("\n\t   Total approved auths:  %d\n", totalapp);
 469                 printf("\t     Total denied auths:  %d\n", totaldeny);
 470         }
 471         return 0;
 472 }