citadel/serv_extensions.c

   1 /*
   2  * $Id$
   3  *
   4  * Citadel Dynamic Loading Module
   5  * Written by Brian Costello <btx@calyx.net>
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <sys/types.h>
  14 #include <dirent.h>
  15 #include <string.h>
  16 #include <limits.h>
  17 #include <ctype.h>
  18 #include "citadel.h"
  19 #include "server.h"
  20 #include "serv_extensions.h"
  21 #include "sysdep_decls.h"
  22 #include "msgbase.h"
  23 #include "tools.h"
  24 #include "config.h"
  25
  26 #ifndef HAVE_SNPRINTF
  27 #include <stdarg.h>
  28 #include "snprintf.h"
  29 #endif
  30
  31 struct CleanupFunctionHook *CleanupHookTable = NULL;
  32 struct SessionFunctionHook *SessionHookTable = NULL;
  33 struct UserFunctionHook *UserHookTable = NULL;
  34 struct XmsgFunctionHook *XmsgHookTable = NULL;
  35 struct MessageFunctionHook *MessageHookTable = NULL;
  36 struct NetprocFunctionHook *NetprocHookTable = NULL;
  37 struct DeleteFunctionHook *DeleteHookTable = NULL;
  38 struct ServiceFunctionHook *ServiceHookTable = NULL;
  39 struct FixedOutputHook *FixedOutputTable = NULL;
  40 struct RoomFunctionHook *RoomHookTable = NULL;
  41
  42
  43 struct ProtoFunctionHook {
  44         void (*handler) (char *cmdbuf);
  45         char *cmd;
  46         char *desc;
  47         struct ProtoFunctionHook *next;
  48 } *ProtoHookList = NULL;
  49
  50
  51 #define ERR_PORT (1 << 1)
  52
  53
  54 static char *portlist = NULL;
  55 static size_t nSizPort = 0;
  56
  57 static char *errormessages = NULL;
  58 static size_t nSizErrmsg = 0;
  59
  60
  61 static long   DetailErrorFlags;
  62
  63 char *ErrSubject = "Startup Problems";
  64 char *ErrGeneral = "Citadel had trouble on starting up. %s This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
  65 "If you don't want citadel to provide these services, turn them off in WebCit via %s%s\n\n%s\n\n"
  66 "To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
  67 "The errors returned by the system were:\n%s\n"
  68 "You can recheck the above if you follow this faq item:\n"
  69 "http://www.citadel.org/doku.php/faq:mastering_your_os:net#netstat";
  70
  71
  72 char *ErrPortShort = "We couldn't bind all ports you configured to be provided by citadel server.";
  73 char *ErrPortWhere = "Admin->System Preferences->Network.\n\nThe failed ports and sockets are: ";
  74 char *ErrPortHint = "If you want citadel to provide you with that functionality, "
  75 "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
  76 " and stop the programm, that binds these ports. You should eventually remove "
  77 " their initscripts in /etc/init.d so that you won't get this trouble once more.\n";
  78
  79
  80 void LogPrintMessages(long err)
  81 {
  82         char *List, *DetailList, *Short, *Where, *Hint, *Message;
  83         int n = nSizPort + nSizErrmsg + 5;
  84
  85         Message = (char*) malloc(n * SIZ);
  86
  87         switch (err)
  88         {
  89         case ERR_PORT:
  90                 Short = ErrPortShort;
  91                 Where = ErrPortWhere;
  92                 Hint  = ErrPortHint;
  93                 List  = portlist;
  94                 DetailList = errormessages;
  95                 break;
  96         default:
  97                 Short = "";
  98                 Where = "";
  99                 Hint  = "";
 100                 List  = "";
 101                 DetailList = "";
 102         }
 103
 104
 105         snprintf(Message, n * SIZ, ErrGeneral, Short, Where, List, Hint, DetailList);
 106
 107         quickie_message("Citadel", NULL, NULL, AIDEROOM, Message, FMT_FIXED, ErrSubject);
 108         if (errormessages!=NULL) free (errormessages);
 109         errormessages = NULL;
 110         if (portlist!=NULL) free (portlist);
 111         portlist = NULL;
 112         free(Message);
 113 }
 114
 115
 116
 117 void AppendString(char **target, char *append, size_t *len, size_t rate)
 118 {
 119         size_t oLen = 0;
 120         long AddLen;
 121         long RelPtr = 0;
 122
 123         AddLen = strlen(append);
 124
 125         if (*len == 0)
 126         {
 127                 *len = rate;
 128
 129                 *target = (char*)malloc (*len * SIZ);
 130         }
 131         else
 132         {
 133                 oLen = strlen(*target);
 134                 RelPtr = strlen(*target);
 135                 if (oLen + AddLen + 2 > *len * SIZ)
 136                 {
 137                         char *Buff = *target;
 138                         size_t NewSiz = *len + 10;
 139                         *target = malloc (NewSiz * SIZ);
 140                         memcpy (*target, Buff, NewSiz * SIZ);
 141                         *len = NewSiz;
 142                 }
 143         }
 144         memcpy (*target + oLen, append, AddLen);
 145         (*target)[oLen + AddLen + 1] = '\n';
 146         (*target)[oLen + AddLen + 2] = '\0';
 147 }
 148
 149 void AddPortError(char *Port, char *ErrorMessage)
 150 {
 151         char *pos;
 152         long len;
 153
 154         DetailErrorFlags |= ERR_PORT;
 155
 156         AppendString(&errormessages, ErrorMessage, &nSizErrmsg, 10);
 157         AppendString(&portlist, Port, &nSizPort, 2);
 158
 159         pos = strchr (portlist, ':');
 160         if (pos != NULL) *pos = ';';
 161
 162         len = strlen (errormessages);
 163         if (nSizErrmsg * SIZ > len + 3)
 164         {
 165                 errormessages[len] = ';';
 166                 errormessages[len+1] = ' ';
 167                 errormessages[len+2] = '\0';
 168         }
 169 }
 170
 171
 172 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 173 {
 174         struct ProtoFunctionHook *p;
 175
 176         p = (struct ProtoFunctionHook *)
 177                 malloc(sizeof(struct ProtoFunctionHook));
 178
 179         if (p == NULL) {
 180                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 181                 exit(EXIT_FAILURE);
 182         }
 183         p->handler = handler;
 184         p->cmd = cmd;
 185         p->desc = desc;
 186         p->next = ProtoHookList;
 187         ProtoHookList = p;
 188         lprintf(CTDL_INFO, "Registered server command %s (%s)\n", cmd, desc);
 189 }
 190
 191
 192 void CtdlUnregisterProtoHook(void (*handler) (char *), char *cmd)
 193 {
 194         struct ProtoFunctionHook *cur = NULL;
 195         struct ProtoFunctionHook *p = NULL;
 196         struct ProtoFunctionHook *lastcur = NULL;
 197
 198         for (cur = ProtoHookList;
 199              cur != NULL;
 200              cur = (cur != NULL)? cur->next: NULL) {
 201                 /* This will also remove duplicates if any */
 202                 while (cur != NULL &&
 203                                 handler == cur->handler &&
 204                                 !strcmp(cmd, cur->cmd)) {
 205                         lprintf(CTDL_INFO, "Unregistered server command %s (%s)\n",
 206                                         cmd, cur->desc);
 207                         p = cur->next;
 208                         if (cur == ProtoHookList) {
 209                                 ProtoHookList = p;
 210                         }
 211                         else if (lastcur != NULL)
 212                         {
 213                                 lastcur->next = p;
 214                         }
 215                         free(cur);
 216                         cur = p;
 217                 }
 218                 lastcur = cur;
 219         }
 220 }
 221
 222 void CtdlDestroyProtoHooks(void)
 223 {
 224         struct ProtoFunctionHook *cur, *p;
 225
 226         cur = ProtoHookList;
 227         while (cur != NULL)
 228         {
 229                 lprintf(CTDL_INFO, "Destroyed server command %s (%s)\n",
 230                         cur->cmd, cur->desc);
 231                 p = cur->next;
 232                 free(cur);
 233                 cur = p;
 234         }
 235         ProtoHookList = NULL;
 236 }
 237
 238
 239 int DLoader_Exec_Cmd(char *cmdbuf)
 240 {
 241         struct ProtoFunctionHook *p;
 242
 243         for (p = ProtoHookList; p; p = p->next) {
 244                 if (!strncasecmp(cmdbuf, p->cmd, 4)) {
 245                         p->handler(&cmdbuf[5]);
 246                         return 1;
 247                 }
 248         }
 249         return 0;
 250 }
 251
 252 #if 0
 253 void initialize_server_extensions(void)
 254 {
 255         long filter;
 256
 257         nSizErrmsg = 0;
 258
 259         /*lprintf(CTDL_INFO, "%s\n", serv_bio_init());
 260         lprintf(CTDL_INFO, "%s\n", serv_calendar_init());
 261         lprintf(CTDL_INFO, "%s\n", serv_notes_init());
 262         lprintf(CTDL_INFO, "%s\n", serv_ldap_init());
 263         lprintf(CTDL_INFO, "%s\n", serv_chat_init());
 264         lprintf(CTDL_INFO, "%s\n", serv_expire_init());
 265         lprintf(CTDL_INFO, "%s\n", serv_imap_init());
 266         lprintf(CTDL_INFO, "%s\n", serv_upgrade_init());
 267         lprintf(CTDL_INFO, "%s\n", serv_inetcfg_init());
 268         lprintf(CTDL_INFO, "%s\n", serv_listsub_init());
 269         lprintf(CTDL_INFO, "%s\n", serv_mrtg_init());
 270         lprintf(CTDL_INFO, "%s\n", serv_netfilter_init());
 271         lprintf(CTDL_INFO, "%s\n", serv_network_init());
 272         lprintf(CTDL_INFO, "%s\n", serv_newuser_init());
 273         lprintf(CTDL_INFO, "%s\n", serv_pas2_init());
 274         lprintf(CTDL_INFO, "%s\n", serv_smtp_init());
 275         lprintf(CTDL_INFO, "%s\n", serv_pop3_init());
 276         lprintf(CTDL_INFO, "%s\n", serv_rwho_init());
 277         lprintf(CTDL_INFO, "%s\n", serv_spam_init());*/
 278         /* lprintf(CTDL_INFO, "%s\n", serv_test_init()); */
 279         /*lprintf(CTDL_INFO, "%s\n", serv_vandelay_init());
 280         lprintf(CTDL_INFO, "%s\n", serv_vcard_init());
 281         lprintf(CTDL_INFO, "%s\n", serv_fulltext_init());
 282         lprintf(CTDL_INFO, "%s\n", serv_autocompletion_init());
 283         lprintf(CTDL_INFO, "%s\n", serv_postfix_tcpdict());
 284         lprintf(CTDL_INFO, "%s\n", serv_sieve_init());
 285         lprintf(CTDL_INFO, "%s\n", serv_managesieve_init());
 286         lprintf(CTDL_INFO, "%s\n", serv_funambol_init());*/
 287         for (filter = 1; filter != 0; filter = filter << 1)
 288                 if ((filter & DetailErrorFlags) != 0)
 289                         LogPrintMessages(filter);
 290 }
 291
 292 #endif
 293
 294 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 295 {
 296
 297         struct CleanupFunctionHook *newfcn;
 298
 299         newfcn = (struct CleanupFunctionHook *)
 300             malloc(sizeof(struct CleanupFunctionHook));
 301         newfcn->next = CleanupHookTable;
 302         newfcn->h_function_pointer = fcn_ptr;
 303         CleanupHookTable = newfcn;
 304
 305         lprintf(CTDL_INFO, "Registered a new cleanup function\n");
 306 }
 307
 308
 309 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 310 {
 311         struct CleanupFunctionHook *cur, *p;
 312
 313         for (cur = CleanupHookTable; cur != NULL; cur = cur->next) {
 314                 /* This will also remove duplicates if any */
 315                 while (cur != NULL &&
 316                                 fcn_ptr == cur->h_function_pointer) {
 317                         lprintf(CTDL_INFO, "Unregistered cleanup function\n");
 318                         p = cur->next;
 319                         if (cur == CleanupHookTable) {
 320                                 CleanupHookTable = p;
 321                         }
 322                         free(cur);
 323                         cur = p;
 324                 }
 325         }
 326 }
 327
 328 void CtdlDestroyCleanupHooks(void)
 329 {
 330         struct CleanupFunctionHook *cur, *p;
 331
 332         cur = CleanupHookTable;
 333         while (cur != NULL)
 334         {
 335                 lprintf(CTDL_INFO, "Destroyed cleanup function\n");
 336                 p = cur->next;
 337                 free(cur);
 338                 cur = p;
 339         }
 340         CleanupHookTable = NULL;
 341 }
 342
 343
 344 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType)
 345 {
 346
 347         struct SessionFunctionHook *newfcn;
 348
 349         newfcn = (struct SessionFunctionHook *)
 350             malloc(sizeof(struct SessionFunctionHook));
 351         newfcn->next = SessionHookTable;
 352         newfcn->h_function_pointer = fcn_ptr;
 353         newfcn->eventtype = EventType;
 354         SessionHookTable = newfcn;
 355
 356         lprintf(CTDL_INFO, "Registered a new session function (type %d)\n",
 357                 EventType);
 358 }
 359
 360
 361 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 362 {
 363         struct SessionFunctionHook *cur, *p;
 364
 365         for (cur = SessionHookTable; cur != NULL; cur = cur->next) {
 366                 /* This will also remove duplicates if any */
 367                 while (cur != NULL &&
 368                                 fcn_ptr == cur->h_function_pointer &&
 369                                 EventType == cur->eventtype) {
 370                         lprintf(CTDL_INFO, "Unregistered session function (type %d)\n",
 371                                         EventType);
 372                         p = cur->next;
 373                         if (cur == SessionHookTable) {
 374                                 SessionHookTable = p;
 375                         }
 376                         free(cur);
 377                         cur = p;
 378                 }
 379         }
 380 }
 381
 382 void CtdlDestroySessionHooks(void)
 383 {
 384         struct SessionFunctionHook *cur, *p;
 385
 386         cur = SessionHookTable;
 387         while (cur != NULL)
 388         {
 389                 lprintf(CTDL_INFO, "Destroyed session function\n");
 390                 p = cur->next;
 391                 free(cur);
 392                 cur = p;
 393         }
 394         SessionHookTable = NULL;
 395 }
 396
 397
 398 void CtdlRegisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 399 {
 400
 401         struct UserFunctionHook *newfcn;
 402
 403         newfcn = (struct UserFunctionHook *)
 404             malloc(sizeof(struct UserFunctionHook));
 405         newfcn->next = UserHookTable;
 406         newfcn->h_function_pointer = fcn_ptr;
 407         newfcn->eventtype = EventType;
 408         UserHookTable = newfcn;
 409
 410         lprintf(CTDL_INFO, "Registered a new user function (type %d)\n",
 411                 EventType);
 412 }
 413
 414
 415 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 416 {
 417         struct UserFunctionHook *cur, *p;
 418
 419         for (cur = UserHookTable; cur != NULL; cur = cur->next) {
 420                 /* This will also remove duplicates if any */
 421                 while (cur != NULL &&
 422                                 fcn_ptr == cur->h_function_pointer &&
 423                                 EventType == cur->eventtype) {
 424                         lprintf(CTDL_INFO, "Unregistered user function (type %d)\n",
 425                                         EventType);
 426                         p = cur->next;
 427                         if (cur == UserHookTable) {
 428                                 UserHookTable = p;
 429                         }
 430                         free(cur);
 431                         cur = p;
 432                 }
 433         }
 434 }
 435
 436 void CtdlDestroyUserHooks(void)
 437 {
 438         struct UserFunctionHook *cur, *p;
 439
 440         cur = UserHookTable;
 441         while (cur != NULL)
 442         {
 443                 lprintf(CTDL_INFO, "Destroyed user function \n");
 444                 p = cur->next;
 445                 free(cur);
 446                 cur = p;
 447         }
 448         UserHookTable = NULL;
 449 }
 450
 451
 452 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *),
 453                                 int EventType)
 454 {
 455
 456         struct MessageFunctionHook *newfcn;
 457
 458         newfcn = (struct MessageFunctionHook *)
 459             malloc(sizeof(struct MessageFunctionHook));
 460         newfcn->next = MessageHookTable;
 461         newfcn->h_function_pointer = handler;
 462         newfcn->eventtype = EventType;
 463         MessageHookTable = newfcn;
 464
 465         lprintf(CTDL_INFO, "Registered a new message function (type %d)\n",
 466                 EventType);
 467 }
 468
 469
 470 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *),
 471                 int EventType)
 472 {
 473         struct MessageFunctionHook *cur, *p;
 474
 475         for (cur = MessageHookTable; cur != NULL; cur = cur->next) {
 476                 /* This will also remove duplicates if any */
 477                 while (cur != NULL &&
 478                                 handler == cur->h_function_pointer &&
 479                                 EventType == cur->eventtype) {
 480                         lprintf(CTDL_INFO, "Unregistered message function (type %d)\n",
 481                                         EventType);
 482                         p = cur->next;
 483                         if (cur == MessageHookTable) {
 484                                 MessageHookTable = p;
 485                         }
 486                         free(cur);
 487                         cur = p;
 488                 }
 489         }
 490 }
 491
 492 void CtdlDestroyMessageHook(void)
 493 {
 494         struct MessageFunctionHook *cur, *p;
 495
 496         cur = MessageHookTable;
 497         while (cur != NULL)
 498         {
 499                 lprintf(CTDL_INFO, "Destroyed message function \n");
 500                 p = cur->next;
 501                 free(cur);
 502                 cur = p;
 503         }
 504         MessageHookTable = NULL;
 505 }
 506
 507
 508 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 509 {
 510         struct RoomFunctionHook *newfcn;
 511
 512         newfcn = (struct RoomFunctionHook *)
 513             malloc(sizeof(struct RoomFunctionHook));
 514         newfcn->next = RoomHookTable;
 515         newfcn->fcn_ptr = fcn_ptr;
 516         RoomHookTable = newfcn;
 517
 518         lprintf(CTDL_INFO, "Registered a new room function\n");
 519 }
 520
 521
 522 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 523 {
 524         struct RoomFunctionHook *cur, *p;
 525
 526         for (cur = RoomHookTable; cur != NULL; cur = cur->next) {
 527                 while (cur != NULL && fcn_ptr == cur->fcn_ptr) {
 528                         lprintf(CTDL_INFO, "Unregistered room function\n");
 529                         p = cur->next;
 530                         if (cur == RoomHookTable) {
 531                                 RoomHookTable = p;
 532                         }
 533                         free(cur);
 534                         cur = p;
 535                 }
 536         }
 537 }
 538
 539
 540 void CtdlDestroyRoomHooks(void)
 541 {
 542         struct RoomFunctionHook *cur, *p;
 543
 544         cur = RoomHookTable;
 545         while (cur != NULL)
 546         {
 547                 lprintf(CTDL_INFO, "Unregistered room function\n");
 548                 p = cur->next;
 549                 free(cur);
 550                 cur = p;
 551         }
 552         RoomHookTable = NULL;
 553 }
 554
 555 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 556 {
 557         struct NetprocFunctionHook *newfcn;
 558
 559         newfcn = (struct NetprocFunctionHook *)
 560             malloc(sizeof(struct NetprocFunctionHook));
 561         newfcn->next = NetprocHookTable;
 562         newfcn->h_function_pointer = handler;
 563         NetprocHookTable = newfcn;
 564
 565         lprintf(CTDL_INFO, "Registered a new netproc function\n");
 566 }
 567
 568
 569 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 570 {
 571         struct NetprocFunctionHook *cur, *p;
 572
 573         for (cur = NetprocHookTable; cur != NULL; cur = cur->next) {
 574                 /* This will also remove duplicates if any */
 575                 while (cur != NULL &&
 576                                 handler == cur->h_function_pointer ) {
 577                         lprintf(CTDL_INFO, "Unregistered netproc function\n");
 578                         p = cur->next;
 579                         if (cur == NetprocHookTable) {
 580                                 NetprocHookTable = p;
 581                         }
 582                         free(cur);
 583                         cur = p;
 584                 }
 585         }
 586 }
 587
 588 void CtdlDestroyNetprocHooks(void)
 589 {
 590         struct NetprocFunctionHook *cur, *p;
 591
 592         cur = NetprocHookTable;
 593         while (cur != NULL)
 594         {
 595                 lprintf(CTDL_INFO, "Unregistered netproc function\n");
 596                 p = cur->next;
 597                 free(cur);
 598                 cur = p;
 599         }
 600         NetprocHookTable = NULL;
 601 }
 602
 603
 604 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 605 {
 606         struct DeleteFunctionHook *newfcn;
 607
 608         newfcn = (struct DeleteFunctionHook *)
 609             malloc(sizeof(struct DeleteFunctionHook));
 610         newfcn->next = DeleteHookTable;
 611         newfcn->h_function_pointer = handler;
 612         DeleteHookTable = newfcn;
 613
 614         lprintf(CTDL_INFO, "Registered a new netproc function\n");
 615 }
 616
 617
 618 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 619 {
 620         struct DeleteFunctionHook *cur, *p;
 621
 622         for (cur = DeleteHookTable; cur != NULL; cur = cur->next) {
 623                 /* This will also remove duplicates if any */
 624                 while (cur != NULL &&
 625                                 handler == cur->h_function_pointer ) {
 626                         lprintf(CTDL_INFO, "Unregistered netproc function\n");
 627                         p = cur->next;
 628                         if (cur == DeleteHookTable) {
 629                                 DeleteHookTable = p;
 630                         }
 631                         free(cur);
 632                         cur = p;
 633                 }
 634         }
 635 }
 636 void CtdlDestroyDeleteHooks(void)
 637 {
 638         struct DeleteFunctionHook *cur, *p;
 639
 640         cur = DeleteHookTable;
 641         while (cur != NULL)
 642         {
 643                 lprintf(CTDL_INFO, "Destroyed netproc function\n");
 644                 p = cur->next;
 645                 free(cur);
 646                 cur = p;
 647         }
 648         DeleteHookTable = NULL;
 649 }
 650
 651
 652
 653
 654 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
 655 {
 656         struct FixedOutputHook *newfcn;
 657
 658         newfcn = (struct FixedOutputHook *)
 659             malloc(sizeof(struct FixedOutputHook));
 660         newfcn->next = FixedOutputTable;
 661         newfcn->h_function_pointer = handler;
 662         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
 663         FixedOutputTable = newfcn;
 664
 665         lprintf(CTDL_INFO, "Registered a new fixed output function for %s\n", newfcn->content_type);
 666 }
 667
 668
 669 void CtdlUnregisterFixedOutputHook(char *content_type)
 670 {
 671         struct FixedOutputHook *cur, *p;
 672
 673         for (cur = FixedOutputTable; cur != NULL; cur = cur->next) {
 674                 /* This will also remove duplicates if any */
 675                 while (cur != NULL && (!strcasecmp(content_type, cur->content_type))) {
 676                         lprintf(CTDL_INFO, "Unregistered fixed output function for %s\n", content_type);
 677                         p = cur->next;
 678                         if (cur == FixedOutputTable) {
 679                                 FixedOutputTable = p;
 680                         }
 681                         free(cur);
 682                         cur = p;
 683                 }
 684         }
 685 }
 686
 687 void CtdlDestroyFixedOutputHooks(void)
 688 {
 689         struct FixedOutputHook *cur, *p;
 690
 691         cur = FixedOutputTable;
 692         while (cur != NULL)
 693         {
 694                 lprintf(CTDL_INFO, "Destroyed fixed output function for %s\n", cur->content_type);
 695                 p = cur->next;
 696                 free(cur);
 697                 cur = p;
 698
 699         }
 700         FixedOutputTable = NULL;
 701 }
 702
 703 /* returns nonzero if we found a hook and used it */
 704 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
 705 {
 706         struct FixedOutputHook *fcn;
 707
 708         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
 709                 if (!strcasecmp(content_type, fcn->content_type)) {
 710                         (*fcn->h_function_pointer) (content, content_length);
 711                         return(1);
 712                 }
 713         }
 714         return(0);
 715 }
 716
 717
 718
 719
 720
 721 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *), int order)
 722 {
 723
 724         struct XmsgFunctionHook *newfcn;
 725
 726         newfcn = (struct XmsgFunctionHook *)
 727             malloc(sizeof(struct XmsgFunctionHook));
 728         newfcn->next = XmsgHookTable;
 729         newfcn->order = order;
 730         newfcn->h_function_pointer = fcn_ptr;
 731         XmsgHookTable = newfcn;
 732         lprintf(CTDL_INFO, "Registered a new x-msg function (priority %d)\n", order);
 733 }
 734
 735
 736 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *), int order)
 737 {
 738         struct XmsgFunctionHook *cur, *p;
 739
 740         for (cur = XmsgHookTable; cur != NULL; cur = cur->next) {
 741                 /* This will also remove duplicates if any */
 742                 while (cur != NULL &&
 743                                 fcn_ptr == cur->h_function_pointer &&
 744                                 order == cur->order) {
 745                         lprintf(CTDL_INFO, "Unregistered x-msg function "
 746                                         "(priority %d)\n", order);
 747                         p = cur->next;
 748                         if (cur == XmsgHookTable) {
 749                                 XmsgHookTable = p;
 750                         }
 751                         free(cur);
 752                         cur = p;
 753                 }
 754         }
 755 }
 756
 757 void CtdlDestroyXmsgHooks(void)
 758 {
 759         struct XmsgFunctionHook *cur, *p;
 760
 761         cur = XmsgHookTable;
 762         while (cur != NULL)
 763         {
 764                 lprintf(CTDL_INFO, "Destroyed x-msg function "
 765                         "(priority %d)\n", cur->order);
 766                 p = cur->next;
 767
 768                 free(cur);
 769                 cur = p;
 770         }
 771         XmsgHookTable = NULL;
 772 }
 773
 774
 775 void CtdlRegisterServiceHook(int tcp_port,
 776                         char *sockpath,
 777                         void (*h_greeting_function) (void),
 778                         void (*h_command_function) (void),
 779                         void (*h_async_function) (void)
 780                         )
 781 {
 782         struct ServiceFunctionHook *newfcn;
 783         char *message;
 784         char *error;
 785
 786         error = NULL;
 787         newfcn = (struct ServiceFunctionHook *)
 788             malloc(sizeof(struct ServiceFunctionHook));
 789         message = (char*) malloc (SIZ);
 790
 791         newfcn->next = ServiceHookTable;
 792         newfcn->tcp_port = tcp_port;
 793         newfcn->sockpath = sockpath;
 794         newfcn->h_greeting_function = h_greeting_function;
 795         newfcn->h_command_function = h_command_function;
 796         newfcn->h_async_function = h_async_function;
 797
 798         if (sockpath != NULL) {
 799                 newfcn->msock = ig_uds_server(sockpath, config.c_maxsessions, &error);
 800                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
 801         }
 802         else if (tcp_port <= 0) {       /* port -1 to disable */
 803                 lprintf(CTDL_INFO, "Service has been manually disabled, skipping\n");
 804                 free (message);
 805                 free(newfcn);
 806                 return;
 807         }
 808         else {
 809                 newfcn->msock = ig_tcp_server(config.c_ip_addr,
 810                                               tcp_port,
 811                                               config.c_maxsessions,
 812                                               &error);
 813                 snprintf(message, SIZ, "TCP port %s:%d: ",
 814                          config.c_ip_addr, tcp_port);
 815         }
 816
 817         if (newfcn->msock > 0) {
 818                 ServiceHookTable = newfcn;
 819                 strcat(message, "registered.");
 820                 lprintf(CTDL_INFO, "%s\n", message);
 821         }
 822         else {
 823                 AddPortError(message, error);
 824                 strcat(message, "FAILED.");
 825                 lprintf(CTDL_CRIT, "%s\n", message);
 826                 free(error);
 827                 free(newfcn);
 828         }
 829         free(message);
 830 }
 831
 832
 833 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
 834                         void (*h_greeting_function) (void),
 835                         void (*h_command_function) (void),
 836                         void (*h_async_function) (void)
 837                         )
 838 {
 839         struct ServiceFunctionHook *cur, *p;
 840
 841         for (cur = ServiceHookTable; cur != NULL; cur = cur->next) {
 842                 /* This will also remove duplicates if any */
 843                 while (cur != NULL &&
 844                                 !(sockpath && cur->sockpath &&
 845                                         strcmp(sockpath, cur->sockpath)) &&
 846                                 h_greeting_function == cur->h_greeting_function &&
 847                                 h_command_function == cur->h_command_function &&
 848                                 h_async_function == cur->h_async_function &&
 849                                 tcp_port == cur->tcp_port) {
 850                         close(cur->msock);
 851                         if (sockpath) {
 852                                 lprintf(CTDL_INFO, "Closed UNIX domain socket %s\n",
 853                                                 sockpath);
 854                         } else if (tcp_port) {
 855                                 lprintf(CTDL_INFO, "Closed TCP port %d\n", tcp_port);
 856                         } else {
 857                                 lprintf(CTDL_INFO, "Unregistered unknown service\n");
 858                         }
 859                         p = cur->next;
 860                         if (cur == ServiceHookTable) {
 861                                 ServiceHookTable = p;
 862                         }
 863                         free(cur);
 864                         cur = p;
 865                 }
 866         }
 867 }
 868
 869 void CtdlDestroyServiceHook(void)
 870 {
 871         struct ServiceFunctionHook *cur, *p;
 872
 873         cur = ServiceHookTable;
 874         while (cur != NULL)
 875         {
 876                 close(cur->msock);
 877                 if (cur->sockpath) {
 878                         lprintf(CTDL_INFO, "Closed UNIX domain socket %s\n",
 879                                 cur->sockpath);
 880                 } else if (cur->tcp_port) {
 881                         lprintf(CTDL_INFO, "Closed TCP port %d\n", cur->tcp_port);
 882                 } else {
 883                         lprintf(CTDL_INFO, "Unregistered unknown service\n");
 884                 }
 885                 p = cur->next;
 886                 free(cur);
 887                 cur = p;
 888         }
 889         ServiceHookTable = NULL;
 890 }
 891
 892
 893 void PerformSessionHooks(int EventType)
 894 {
 895         struct SessionFunctionHook *fcn = NULL;
 896
 897         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
 898                 if (fcn->eventtype == EventType) {
 899                         (*fcn->h_function_pointer) ();
 900                 }
 901         }
 902 }
 903
 904 void PerformUserHooks(struct ctdluser *usbuf, int EventType)
 905 {
 906         struct UserFunctionHook *fcn = NULL;
 907
 908         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
 909                 if (fcn->eventtype == EventType) {
 910                         (*fcn->h_function_pointer) (usbuf);
 911                 }
 912         }
 913 }
 914
 915 int PerformMessageHooks(struct CtdlMessage *msg, int EventType)
 916 {
 917         struct MessageFunctionHook *fcn = NULL;
 918         int total_retval = 0;
 919
 920         /* Other code may elect to protect this message from server-side
 921          * handlers; if this is the case, don't do anything.
 922         lprintf(CTDL_DEBUG, "** Event type is %d, flags are %d\n",
 923                 EventType, msg->cm_flags);
 924          */
 925         if (msg->cm_flags & CM_SKIP_HOOKS) {
 926                 lprintf(CTDL_DEBUG, "Skipping hooks\n");
 927                 return(0);
 928         }
 929
 930         /* Otherwise, run all the hooks appropriate to this event type.
 931          */
 932         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
 933                 if (fcn->eventtype == EventType) {
 934                         total_retval = total_retval +
 935                                 (*fcn->h_function_pointer) (msg);
 936                 }
 937         }
 938
 939         /* Return the sum of the return codes from the hook functions.  If
 940          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
 941          * the save operation to abort.
 942          */
 943         return total_retval;
 944 }
 945
 946
 947 int PerformRoomHooks(struct ctdlroom *target_room)
 948 {
 949         struct RoomFunctionHook *fcn;
 950         int total_retval = 0;
 951
 952         lprintf(CTDL_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
 953
 954         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
 955                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
 956         }
 957
 958         /* Return the sum of the return codes from the hook functions.
 959          */
 960         return total_retval;
 961 }
 962
 963
 964 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
 965 {
 966         struct NetprocFunctionHook *fcn;
 967         int total_retval = 0;
 968
 969         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
 970                 total_retval = total_retval +
 971                         (*fcn->h_function_pointer) (msg, target_room);
 972         }
 973
 974         /* Return the sum of the return codes from the hook functions.
 975          * A nonzero return code will cause the message to *not* be imported.
 976          */
 977         return total_retval;
 978 }
 979
 980
 981 void PerformDeleteHooks(char *room, long msgnum)
 982 {
 983         struct DeleteFunctionHook *fcn;
 984
 985         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
 986                 (*fcn->h_function_pointer) (room, msgnum);
 987         }
 988 }
 989
 990
 991
 992
 993
 994 int PerformXmsgHooks(char *sender, char *recp, char *msg)
 995 {
 996         struct XmsgFunctionHook *fcn;
 997         int total_sent = 0;
 998         int p;
 999
1000         for (p=0; p<MAX_XMSG_PRI; ++p) {
1001                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1002                         if (fcn->order == p) {
1003                                 total_sent +=
1004                                         (*fcn->h_function_pointer)
1005                                                 (sender, recp, msg);
1006                         }
1007                 }
1008                 /* Break out of the loop if a higher-priority function
1009                  * successfully delivered the message.  This prevents duplicate
1010                  * deliveries to local users simultaneously signed onto
1011                  * remote services.
1012                  */
1013                 if (total_sent) break;
1014         }
1015         return total_sent;
1016 }