src/modules/rlm_detail/rlm_detail.c

   1 /*
   2  * rlm_detail.c accounting:    Write the "detail" files.
   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  */
  22
  23 static const char rcsid[] = "$Id$";
  24
  25 #include        "autoconf.h"
  26 #include        "libradius.h"
  27
  28 #include        <sys/stat.h>
  29 #include        <sys/select.h>
  30
  31 #include        <stdlib.h>
  32 #include        <string.h>
  33 #include        <ctype.h>
  34 #include        <fcntl.h>
  35
  36 #include        "radiusd.h"
  37 #include        "modules.h"
  38 #define         DIRLEN  8192
  39
  40 static const char *packet_codes[] = {
  41   "",
  42   "Access-Request",
  43   "Access-Accept",
  44   "Access-Reject",
  45   "Accounting-Request",
  46   "Accounting-Response",
  47   "Accounting-Status",
  48   "Password-Request",
  49   "Password-Accept",
  50   "Password-Reject",
  51   "Accounting-Message",
  52   "Access-Challenge"
  53 };
  54
  55
  56 struct detail_instance {
  57         /* detail file */
  58         char *detailfile;
  59
  60         /* detail file permissions */
  61         int detailperm;
  62
  63         /* directory permissions */
  64         int dirperm;
  65
  66         /* last made directory */
  67         char *last_made_directory;
  68
  69         /* if we want file locking */
  70         int locking;
  71 };
  72
  73 static CONF_PARSER module_config[] = {
  74         { "detailfile",    PW_TYPE_STRING_PTR,
  75           offsetof(struct detail_instance,detailfile), NULL, "%A/%{Client-IP-Address}/detail" },
  76         { "detailperm",    PW_TYPE_INTEGER,
  77           offsetof(struct detail_instance,detailperm), NULL, "0600" },
  78         { "dirperm",       PW_TYPE_INTEGER,
  79           offsetof(struct detail_instance,dirperm),    NULL, "0755" },
  80         { "locking",       PW_TYPE_BOOLEAN,
  81           offsetof(struct detail_instance,locking),    NULL, "no" },
  82         { NULL, -1, 0, NULL, NULL }
  83 };
  84
  85 /*
  86  *      (Re-)read radiusd.conf into memory.
  87  */
  88 static int detail_instantiate(CONF_SECTION *conf, void **instance)
  89 {
  90         struct detail_instance *inst;
  91
  92         inst = rad_malloc(sizeof(*inst));
  93         if (!inst) {
  94                 return -1;
  95         }
  96         memset(inst, 0, sizeof(*inst));
  97
  98         if (cf_section_parse(conf, inst, module_config) < 0) {
  99                 free(inst);
 100                 return -1;
 101         }
 102
 103         inst->last_made_directory = NULL;
 104
 105         *instance = inst;
 106         return 0;
 107 }
 108
 109 /*
 110  *      Do detail, compatible with old accounting
 111  */
 112 static int do_detail(void *instance, REQUEST *request, RADIUS_PACKET *packet,
 113                      int compat)
 114 {
 115         int             outfd;
 116         FILE            *outfp;
 117         char            buffer[DIRLEN];
 118         char            *p;
 119         struct stat     st;
 120         int             locked;
 121         int             lock_count;
 122         struct timeval  tv;
 123         REALM           *proxy_realm;
 124         char            proxy_buffer[16];
 125         VALUE_PAIR      *pair = packet->vps;
 126
 127         struct detail_instance *inst = instance;
 128
 129         /*
 130          *      Nothing to log: don't do anything.
 131          */
 132         if (!packet) {
 133                 return RLM_MODULE_NOOP;
 134         }
 135
 136         /*
 137          *      Create a directory for this nas.
 138          *
 139          *      Generate the path for the detail file.  Use the
 140          *      same format, but truncate at the last /.  Then
 141          *      feed it through radius_xlat() to expand the
 142          *      variables.
 143          */
 144         radius_xlat(buffer, sizeof(buffer), inst->detailfile, request, NULL);
 145         DEBUG2("rlm_detail: %s expands to %s", inst->detailfile, buffer);
 146
 147         /*
 148          *      Grab the last directory delimiter.
 149          */
 150         p = strrchr(buffer,'/');
 151
 152         /*
 153          *      There WAS a directory delimiter there, and
 154          *      the file doesn't exist, so
 155          *      we prolly must create it the dir(s)
 156          */
 157         if ((p) && (stat(buffer, &st) < 0)) {
 158                 *p = '\0';
 159                 /*
 160                  *      NO previously cached directory name, so we've
 161                  *      got to create a new one.
 162                  *
 163                  *      OR the new directory name is different than the old,
 164                  *      so we've got to create a new one.
 165                  *
 166                  *      OR the cached directory has somehow gotten removed,
 167                  *      so we've got to create a new one.
 168                  */
 169                 if ((inst->last_made_directory == NULL) ||
 170                     (strcmp(inst->last_made_directory, buffer) != 0)) {
 171
 172                         /*
 173                          *      Free any previously cached name.
 174                          */
 175                         if (inst->last_made_directory != NULL) {
 176                                 free((char *) inst->last_made_directory);
 177                                 inst->last_made_directory = NULL;
 178                         }
 179
 180                         /*
 181                          *      Go create possibly multiple directories.
 182                          */
 183                         if (rad_mkdir(buffer, inst->dirperm) < 0) {
 184                                 radlog(L_ERR, "rlm_detail: Failed to create directory %s: %s", buffer, strerror(errno));
 185                                 return RLM_MODULE_FAIL;
 186                         }
 187                         inst->last_made_directory = strdup(buffer);
 188                 }
 189
 190                 *p = '/';
 191         } /* else there was no directory delimiter. */
 192
 193         /*
 194          *      Open & create the file, with the given permissions.
 195          */
 196         if ((outfd = open(buffer, O_WRONLY | O_APPEND | O_CREAT,
 197                           inst->detailperm)) < 0) {
 198                 radlog(L_ERR, "rlm_detail: Couldn't open file %s: %s",
 199                        buffer, strerror(errno));
 200                 return RLM_MODULE_FAIL;
 201         }
 202
 203         /*
 204          *      If we're not using locking, we'll just pass straight though
 205          *      the while loop.
 206          *      If we fail to aquire the filelock in 80 tries (approximately
 207          *      two seconds) we bail out.
 208          */
 209         locked = 0;
 210         lock_count = 0;
 211         do {
 212                 if (inst->locking) {
 213                         lseek(outfd, 0L, SEEK_SET);
 214                         if (rad_lockfd_nonblock(outfd, 0) < 0) {
 215                                 close(outfd);
 216                                 tv.tv_sec = 0;
 217                                 tv.tv_usec = 25000;
 218                                 select(0, NULL, NULL, NULL, &tv);
 219                                 lock_count++;
 220                         } else {
 221                                 DEBUG("rlm_detail: Acquired filelock, tried %d time(s)",
 222                                       lock_count + 1);
 223                                 locked = 1;
 224                         }
 225                 }
 226         } while (!locked && inst->locking && lock_count < 80);
 227
 228         if (!locked && inst->locking && lock_count >= 80) {
 229                 radlog(L_ERR, "rlm_detail: Failed to aquire filelock for %s, giving up",
 230                        buffer);
 231                 return RLM_MODULE_FAIL;
 232         }
 233
 234         /*
 235          *      Convert the FD to FP.  The FD is no longer valid
 236          *      after this operation.
 237          */
 238         if ((outfp = fdopen(outfd, "a")) == NULL) {
 239                 radlog(L_ERR, "rlm_detail: Couldn't open file %s: %s",
 240                        buffer, strerror(errno));
 241                 if (inst->locking) {
 242                         lseek(outfd, 0L, SEEK_SET);
 243                         rad_unlockfd(outfd, 0);
 244                         DEBUG("rlm_detail: Released filelock");
 245                 }
 246                 close(outfd);
 247
 248                 return RLM_MODULE_FAIL;
 249         }
 250
 251         /*
 252          *      Write the information to the file.
 253          */
 254         if (!compat) {
 255                 /*
 256                  *      Print out names, if they're OK.
 257                  *      Numbers, if not.
 258                  */
 259                 if ((packet->code > 0) &&
 260                     (packet->code <= PW_ACCESS_CHALLENGE)) {
 261                         fprintf(outfp, "Packet-Type = %s\n",
 262                                 packet_codes[packet->code]);
 263                 } else {
 264                         fprintf(outfp, "Packet-Type = %d\n", packet->code);
 265                 }
 266         }
 267
 268         /*
 269          *      Post a timestamp
 270          */
 271         fseek(outfp, 0L, SEEK_END);
 272         fputs(CTIME_R(&request->timestamp, buffer, DIRLEN), outfp);
 273
 274         /* Write each attribute/value to the log file */
 275         while (pair) {
 276                 /*
 277                  *      Don't print passwords in old format...
 278                  */
 279                 if (compat && (pair->attribute == PW_PASSWORD)) {
 280                         pair = pair->next;
 281                         continue;
 282                 }
 283
 284                 /*
 285                  *      Print all of the attributes.
 286                  */
 287                 fputs("\t", outfp);
 288                 vp_print(outfp, pair);
 289                 fputs("\n", outfp);
 290                 pair = pair->next;
 291         }
 292
 293         /*
 294          *      Add non-protocol attibutes.
 295          */
 296         if (compat) {
 297                 if ((pair = pairfind(request->config_items,
 298                                      PW_PROXY_TO_REALM)) != NULL) {
 299                         proxy_realm = realm_find(pair->strvalue, TRUE);
 300                         if (proxy_realm) {
 301                                 memset((char *) proxy_buffer, 0, 16);
 302                                 ip_ntoa(proxy_buffer, proxy_realm->acct_ipaddr);
 303                                 fprintf(outfp, "\tFreeradius-Proxied-To = %s\n",
 304                                         proxy_buffer);
 305                                 DEBUG("rlm_detail: Freeradius-Proxied-To set to %s",
 306                                       proxy_buffer);
 307                         }
 308                 }
 309                 fprintf(outfp, "\tTimestamp = %ld\n", request->timestamp);
 310
 311                 if (request->packet->verified == 2)
 312                         fputs("\tRequest-Authenticator = Verified\n", outfp);
 313                 else if (request->packet->verified == 1)
 314                         fputs("\tRequest-Authenticator = None\n", outfp);
 315         }
 316
 317         fputs("\n", outfp);
 318
 319         if (inst->locking) {
 320                 fflush(outfp);
 321                 lseek(outfd, 0L, SEEK_SET);
 322                 rad_unlockfd(outfd, 0);
 323                 DEBUG("rlm_detail: Released filelock");
 324         }
 325
 326         fclose(outfp);
 327
 328         /*
 329          *      And everything is fine.
 330          */
 331         return RLM_MODULE_OK;
 332 }
 333
 334 /*
 335  *      Accounting - write the detail files.
 336  */
 337 static int detail_accounting(void *instance, REQUEST *request)
 338 {
 339
 340         return do_detail(instance,request,request->packet, TRUE);
 341 }
 342
 343 /*
 344  *      Incoming Access Request - write the detail files.
 345  */
 346 static int detail_authorize(void *instance, REQUEST *request)
 347 {
 348         return do_detail(instance,request,request->packet, FALSE);
 349 }
 350
 351 /*
 352  *      Outgoing Access-Request Reply - write the detail files.
 353  */
 354 static int detail_postauth(void *instance, REQUEST *request)
 355 {
 356         return do_detail(instance,request,request->reply, FALSE);
 357 }
 358
 359
 360 /*
 361  *      Outgoing Access-Request to home server - write the detail files.
 362  */
 363 static int detail_pre_proxy(void *instance, REQUEST *request)
 364 {
 365         if (request->proxy &&
 366             request->proxy->vps) {
 367                 return do_detail(instance,request,request->proxy, FALSE);
 368         }
 369
 370         return RLM_MODULE_NOOP;
 371 }
 372
 373
 374 /*
 375  *      Outgoing Access-Request Reply - write the detail files.
 376  */
 377 static int detail_post_proxy(void *instance, REQUEST *request)
 378 {
 379         if (request->proxy_reply &&
 380             request->proxy_reply->vps) {
 381                 return do_detail(instance,request,request->proxy_reply, FALSE);
 382         }
 383
 384         return RLM_MODULE_NOOP;
 385 }
 386
 387
 388 /*
 389  *      Clean up.
 390  */
 391 static int detail_detach(void *instance)
 392 {
 393         struct detail_instance *inst = instance;
 394         free((char *) inst->detailfile);
 395
 396         if (inst->last_made_directory)
 397                 free((char*) inst->last_made_directory);
 398         free(inst);
 399         return 0;
 400 }
 401
 402
 403 /* globally exported name */
 404 module_t rlm_detail = {
 405         "detail",
 406         RLM_TYPE_THREAD_UNSAFE,        /* type: reserved */
 407         NULL,                           /* initialization */
 408         detail_instantiate,             /* instantiation */
 409         {
 410                 NULL,                   /* authentication */
 411                 detail_authorize,       /* authorization */
 412                 NULL,                   /* preaccounting */
 413                 detail_accounting,      /* accounting */
 414                 NULL,                   /* checksimul */
 415                 detail_pre_proxy,       /* pre-proxy */
 416                 detail_post_proxy,      /* post-proxy */
 417                 detail_postauth         /* post-auth */
 418         },
 419         detail_detach,                  /* detach */
 420         NULL                            /* destroy */
 421 };
 422