citadel/serv_extensions.c

   1 /*
   2  * Citadel Extension Loader
   3  * Written by Brian Costello <btx@calyx.net>
   4  *
   5  * Copyright (c) 1987-2015 by the citadel.org team
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License, version 3.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <stdio.h>
  17 #include <libcitadel.h>
  18
  19 #include "sysdep_decls.h"
  20 #include "modules/crypto/serv_crypto.h" /* Needed until a universal crypto startup hook is implimented for CtdlStartTLS */
  21
  22 #include "serv_extensions.h"
  23 #include "ctdl_module.h"
  24 #include "config.h"
  25
  26
  27 int DebugModules = 0;
  28
  29 /*
  30  * Structure defentitions for hook tables
  31  */
  32
  33 HashList *LogDebugEntryTable = NULL;
  34
  35 typedef struct LogFunctionHook LogFunctionHook;
  36 struct LogFunctionHook {
  37         LogFunctionHook *next;
  38         int loglevel;
  39         void (*h_function_pointer) (char *);
  40 };
  41
  42 LogFunctionHook *LogHookTable = NULL;
  43
  44 typedef struct FixedOutputHook FixedOutputHook;
  45 struct FixedOutputHook {
  46         FixedOutputHook *next;
  47         char content_type[64];
  48         void (*h_function_pointer) (char *, int);
  49 };
  50 FixedOutputHook *FixedOutputTable = NULL;
  51
  52
  53
  54 /*
  55  * TDAPVetoHookFunctionHook extensions are used for any type of hook for which
  56  * may prevent the autopurger to run for this specific data class.
  57  * the function should at least LOG_INFO that it does so.
  58  */
  59 typedef struct TDAPVetoHookFunctionHook TDAPVetoHookFunctionHook;
  60 struct TDAPVetoHookFunctionHook {
  61         TDAPVetoHookFunctionHook *next;
  62         int Priority;
  63         int (*h_function_pointer) (StrBuf *);
  64         int eventtype;
  65 };
  66 TDAPVetoHookFunctionHook *TDAPVetoHookTable = NULL;
  67
  68
  69
  70 /*
  71  * SessionFunctionHook extensions are used for any type of hook for which
  72  * the context in which it's being called (which is determined by the event
  73  * type) will make it obvious for the hook function to know where to look for
  74  * pertinent data.
  75  */
  76 typedef struct SessionFunctionHook SessionFunctionHook;
  77 struct SessionFunctionHook {
  78         SessionFunctionHook *next;
  79         int Priority;
  80         void (*h_function_pointer) (void);
  81         int eventtype;
  82 };
  83 SessionFunctionHook *SessionHookTable = NULL;
  84
  85 /*
  86  * UserFunctionHook extensions are used for any type of hook which implements
  87  * an operation on a user or username (potentially) other than the one
  88  * operating the current session.
  89  */
  90 typedef struct UserFunctionHook UserFunctionHook;
  91 struct UserFunctionHook {
  92         UserFunctionHook *next;
  93         void (*h_function_pointer) (struct ctdluser *usbuf);
  94         int eventtype;
  95 };
  96 UserFunctionHook *UserHookTable = NULL;
  97
  98 /*
  99  * MessageFunctionHook extensions are used for hooks which implement handlers
 100  * for various types of message operations (save, read, etc.)
 101  */
 102 typedef struct MessageFunctionHook MessageFunctionHook;
 103 struct MessageFunctionHook {
 104         MessageFunctionHook *next;
 105         int (*h_function_pointer) (struct CtdlMessage *msg, recptypes *recps);
 106         int eventtype;
 107 };
 108 MessageFunctionHook *MessageHookTable = NULL;
 109
 110
 111 /*
 112  * NetprocFunctionHook extensions are used for hooks which implement handlers
 113  * for incoming network messages.
 114  */
 115 typedef struct NetprocFunctionHook NetprocFunctionHook;
 116 struct NetprocFunctionHook {
 117         NetprocFunctionHook *next;
 118         int (*h_function_pointer) (struct CtdlMessage *msg, char *target_room);
 119 };
 120 NetprocFunctionHook *NetprocHookTable = NULL;
 121
 122
 123 /*
 124  * DeleteFunctionHook extensions are used for hooks which get called when a
 125  * message is about to be deleted.
 126  */
 127 typedef struct DeleteFunctionHook DeleteFunctionHook;
 128 struct DeleteFunctionHook {
 129         DeleteFunctionHook *next;
 130         void (*h_function_pointer) (char *target_room, long msgnum);
 131 };
 132 DeleteFunctionHook *DeleteHookTable = NULL;
 133
 134
 135 /*
 136  * ExpressMessageFunctionHook extensions are used for hooks which implement
 137  * the sending of an instant message through various channels.  Any function
 138  * registered should return the number of recipients to whom the message was
 139  * successfully transmitted.
 140  */
 141 typedef struct XmsgFunctionHook XmsgFunctionHook;
 142 struct XmsgFunctionHook {
 143         XmsgFunctionHook *next;
 144         int (*h_function_pointer) (char *, char *, char *, char *);
 145         int order;
 146 };
 147 XmsgFunctionHook *XmsgHookTable = NULL;
 148
 149
 150
 151
 152 /*
 153  * RoomFunctionHook extensions are used for hooks which impliment room
 154  * processing functions when new messages are added EG. SIEVE.
 155  */
 156 typedef struct RoomFunctionHook RoomFunctionHook;
 157 struct RoomFunctionHook {
 158         RoomFunctionHook *next;
 159         int (*fcn_ptr) (struct ctdlroom *);
 160 };
 161 RoomFunctionHook *RoomHookTable = NULL;
 162
 163
 164
 165 typedef struct SearchFunctionHook SearchFunctionHook;
 166 struct SearchFunctionHook {
 167         SearchFunctionHook *next;
 168         void (*fcn_ptr) (int *, long **, const char *);
 169         char *name;
 170 };
 171 SearchFunctionHook *SearchFunctionHookTable = NULL;
 172
 173 CleanupFunctionHook *CleanupHookTable = NULL;
 174 CleanupFunctionHook *EVCleanupHookTable = NULL;
 175
 176 ServiceFunctionHook *ServiceHookTable = NULL;
 177
 178 typedef struct ProtoFunctionHook ProtoFunctionHook;
 179 struct ProtoFunctionHook {
 180         void (*handler) (char *cmdbuf);
 181         const char *cmd;
 182         const char *desc;
 183 };
 184
 185 HashList *ProtoHookList = NULL;
 186
 187
 188 #define ERR_PORT (1 << 1)
 189
 190
 191 static StrBuf *portlist = NULL;
 192
 193 static StrBuf *errormessages = NULL;
 194
 195
 196 long   DetailErrorFlags;
 197 ConstStr Empty = {HKEY("")};
 198 char *ErrSubject = "Startup Problems";
 199 ConstStr ErrGeneral[] = {
 200         {HKEY("Citadel had trouble on starting up. ")},
 201         {HKEY(" This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
 202               "If you don't want citadel to provide these services, turn them off in WebCit via: ")},
 203         {HKEY("To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
 204               "The errors returned by the system were:\n")},
 205         {HKEY("You can recheck the above if you follow this faq item:\n"
 206               "http://www.citadel.org/doku.php?id=faq:mastering_your_os:net#netstat")}
 207 };
 208
 209 ConstStr ErrPortShort = { HKEY("We couldn't bind all ports you configured to be provided by citadel server.\n")};
 210 ConstStr ErrPortWhere = { HKEY("\"Admin->System Preferences->Network\".\n\nThe failed ports and sockets are: ")};
 211 ConstStr ErrPortHint  = { HKEY("If you want citadel to provide you with that functionality, "
 212                                "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
 213                                " and stop the program that binds these ports.\n You should eventually remove "
 214                                " their initscripts in /etc/init.d so that you won't get this trouble once more.\n"
 215                                " After that goto \"Administration -> Shutdown Citadel\" to make Citadel restart & retry to bind this port.\n")};
 216
 217
 218 void LogPrintMessages(long err)
 219 {
 220         StrBuf *Message;
 221         StrBuf *List, *DetailList;
 222         ConstStr *Short, *Where, *Hint;
 223
 224
 225         Message = NewStrBufPlain(NULL,
 226                                  StrLength(portlist) + StrLength(errormessages));
 227
 228         DetailErrorFlags = DetailErrorFlags & ~err;
 229
 230         switch (err)
 231         {
 232         case ERR_PORT:
 233                 Short = &ErrPortShort;
 234                 Where = &ErrPortWhere;
 235                 Hint  = &ErrPortHint;
 236                 List  = portlist;
 237                 DetailList = errormessages;
 238                 break;
 239         default:
 240                 Short = &Empty;
 241                 Where = &Empty;
 242                 Hint  = &Empty;
 243                 List  = NULL;
 244                 DetailList = NULL;
 245         }
 246
 247         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[0]), 0);
 248         StrBufAppendBufPlain(Message, CKEY(*Short), 0);
 249         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[1]), 0);
 250         StrBufAppendBufPlain(Message, CKEY(*Where), 0);
 251         StrBufAppendBuf(Message, List, 0);
 252         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 253         StrBufAppendBufPlain(Message, CKEY(*Hint), 0);
 254         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 255         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[2]), 0);
 256         StrBufAppendBuf(Message, DetailList, 0);
 257         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 258         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[3]), 0);
 259
 260         MOD_syslog(LOG_EMERG, "%s", ChrPtr(Message));
 261         MOD_syslog(LOG_EMERG, "%s", ErrSubject);
 262         quickie_message("Citadel", NULL, NULL, AIDEROOM, ChrPtr(Message), FMT_FIXED, ErrSubject);
 263
 264         FreeStrBuf(&Message);
 265         FreeStrBuf(&List);
 266         FreeStrBuf(&DetailList);
 267 }
 268
 269
 270 void AddPortError(char *Port, char *ErrorMessage)
 271 {
 272         long len;
 273
 274         DetailErrorFlags |= ERR_PORT;
 275
 276         len = StrLength(errormessages);
 277         if (len > 0) StrBufAppendBufPlain(errormessages, HKEY("; "), 0);
 278         else errormessages = NewStrBuf();
 279         StrBufAppendBufPlain(errormessages, ErrorMessage, -1, 0);
 280
 281
 282         len = StrLength(portlist);
 283         if (len > 0) StrBufAppendBufPlain(portlist, HKEY(";"), 0);
 284         else portlist = NewStrBuf();
 285         StrBufAppendBufPlain(portlist, Port, -1, 0);
 286 }
 287
 288
 289 int DLoader_Exec_Cmd(char *cmdbuf)
 290 {
 291         void *vP;
 292         ProtoFunctionHook *p;
 293
 294         if (GetHash(ProtoHookList, cmdbuf, 4, &vP) && (vP != NULL)) {
 295                 p = (ProtoFunctionHook*) vP;
 296                 p->handler(&cmdbuf[5]);
 297                 return 1;
 298         }
 299         return 0;
 300 }
 301
 302 void CtdlRegisterDebugFlagHook(const char *Name, long Len, CtdlDbgFunction F, const int *LogP)
 303 {
 304         LogDebugEntry *E;
 305         if (LogDebugEntryTable == NULL)
 306                 LogDebugEntryTable = NewHash(1, NULL);
 307         E = (LogDebugEntry*) malloc(sizeof(LogDebugEntry));
 308         E->F = F;
 309         E->Name = Name;
 310         E->Len = Len;
 311         E->LogP = LogP;
 312         Put(LogDebugEntryTable, Name, Len, E, NULL);
 313
 314 }
 315 void CtdlSetDebugLogFacilities(const char **Str, long n)
 316 {
 317         StrBuf *Token = NULL;
 318         StrBuf *Buf = NULL;
 319         const char *ch;
 320         int i;
 321         int DoAll = 0;
 322         void *vptr;
 323
 324         for (i=0; i < n; i++){
 325                 if ((Str[i] != NULL) && !IsEmptyStr(Str[i])) {
 326                         if (strcmp(Str[i], "all") == 0) {
 327                                 DoAll = 1;
 328                                 continue;
 329                         }
 330                         Buf = NewStrBufPlain(Str[i], -1);
 331                         ch = NULL;
 332                         if (Token == NULL)
 333                                 Token = NewStrBufPlain(NULL, StrLength(Buf));
 334                         while ((ch != StrBufNOTNULL) &&
 335                                StrBufExtract_NextToken(Token, Buf, &ch, ',')) {
 336                                 if (GetHash(LogDebugEntryTable, SKEY(Token), &vptr) &&
 337                                     (vptr != NULL))
 338                                 {
 339                                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 340                                         E->F(1);
 341                                 }
 342                         }
 343                 }
 344                 FreeStrBuf(&Buf);
 345         }
 346         FreeStrBuf(&Token);
 347         if (DoAll) {
 348                 long HKLen;
 349                 const char *ch;
 350                 HashPos *Pos;
 351
 352                 Pos = GetNewHashPos(LogDebugEntryTable, 0);
 353                 while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 354                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 355                         E->F(1);
 356                 }
 357
 358                 DeleteHashPos(&Pos);
 359         }
 360 }
 361 void CtdlDestroyDebugTable(void)
 362 {
 363
 364         DeleteHash(&LogDebugEntryTable);
 365 }
 366
 367 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 368 {
 369         ProtoFunctionHook *p;
 370
 371         if (ProtoHookList == NULL)
 372                 ProtoHookList = NewHash (1, FourHash);
 373
 374
 375         p = (ProtoFunctionHook *)
 376                 malloc(sizeof(ProtoFunctionHook));
 377
 378         if (p == NULL) {
 379                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 380                 exit(EXIT_FAILURE);
 381         }
 382         p->handler = handler;
 383         p->cmd = cmd;
 384         p->desc = desc;
 385
 386         Put(ProtoHookList, cmd, 4, p, NULL);
 387         MOD_syslog(LOG_DEBUG, "Registered server command %s (%s)\n", cmd, desc);
 388 }
 389
 390 void CtdlDestroyProtoHooks(void)
 391 {
 392
 393         DeleteHash(&ProtoHookList);
 394 }
 395
 396
 397 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 398 {
 399
 400         CleanupFunctionHook *newfcn;
 401
 402         newfcn = (CleanupFunctionHook *)
 403             malloc(sizeof(CleanupFunctionHook));
 404         newfcn->next = CleanupHookTable;
 405         newfcn->h_function_pointer = fcn_ptr;
 406         CleanupHookTable = newfcn;
 407
 408         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 409 }
 410
 411
 412 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 413 {
 414         CleanupFunctionHook *cur, *p, *last;
 415         last = NULL;
 416         cur = CleanupHookTable;
 417         while (cur != NULL)
 418         {
 419                 if (fcn_ptr == cur->h_function_pointer)
 420                 {
 421                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 422                         p = cur->next;
 423
 424                         free(cur);
 425                         cur = NULL;
 426
 427                         if (last != NULL)
 428                                 last->next = p;
 429                         else
 430                                 CleanupHookTable = p;
 431                         cur = p;
 432                 }
 433                 else {
 434                         last = cur;
 435                         cur = cur->next;
 436                 }
 437         }
 438 }
 439
 440
 441 void CtdlDestroyCleanupHooks(void)
 442 {
 443         CleanupFunctionHook *cur, *p;
 444
 445         cur = CleanupHookTable;
 446         while (cur != NULL)
 447         {
 448                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 449                 p = cur->next;
 450                 free(cur);
 451                 cur = p;
 452         }
 453         CleanupHookTable = NULL;
 454 }
 455
 456 void CtdlRegisterEVCleanupHook(void (*fcn_ptr) (void))
 457 {
 458
 459         CleanupFunctionHook *newfcn;
 460
 461         newfcn = (CleanupFunctionHook *)
 462             malloc(sizeof(CleanupFunctionHook));
 463         newfcn->next = EVCleanupHookTable;
 464         newfcn->h_function_pointer = fcn_ptr;
 465         EVCleanupHookTable = newfcn;
 466
 467         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 468 }
 469
 470
 471 void CtdlUnregisterEVCleanupHook(void (*fcn_ptr) (void))
 472 {
 473         CleanupFunctionHook *cur, *p, *last;
 474         last = NULL;
 475         cur = EVCleanupHookTable;
 476         while (cur != NULL)
 477         {
 478                 if (fcn_ptr == cur->h_function_pointer)
 479                 {
 480                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 481                         p = cur->next;
 482
 483                         free(cur);
 484                         cur = NULL;
 485
 486                         if (last != NULL)
 487                                 last->next = p;
 488                         else
 489                                 EVCleanupHookTable = p;
 490                         cur = p;
 491                 }
 492                 else {
 493                         last = cur;
 494                         cur = cur->next;
 495                 }
 496         }
 497 }
 498
 499
 500 void CtdlDestroyEVCleanupHooks(void)
 501 {
 502         CleanupFunctionHook *cur, *p;
 503
 504         cur = EVCleanupHookTable;
 505         while (cur != NULL)
 506         {
 507                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 508                 p = cur->next;
 509                 cur->h_function_pointer();
 510                 free(cur);
 511                 cur = p;
 512         }
 513         EVCleanupHookTable = NULL;
 514 }
 515
 516 void CtdlRegisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType, int Priority)
 517 {
 518         TDAPVetoHookFunctionHook *newfcn;
 519
 520         newfcn = (TDAPVetoHookFunctionHook *)
 521             malloc(sizeof(TDAPVetoHookFunctionHook));
 522         newfcn->Priority = Priority;
 523         newfcn->h_function_pointer = fcn_ptr;
 524         newfcn->eventtype = EventType;
 525
 526         TDAPVetoHookFunctionHook **pfcn;
 527         pfcn = &TDAPVetoHookTable;
 528         while ((*pfcn != NULL) &&
 529                ((*pfcn)->Priority < newfcn->Priority) &&
 530                ((*pfcn)->next != NULL))
 531                 pfcn = &(*pfcn)->next;
 532
 533         newfcn->next = *pfcn;
 534         *pfcn = newfcn;
 535
 536         MOD_syslog(LOG_DEBUG, "Registered a new TDAP Veto function (type %d Priority %d)\n",
 537                    EventType, Priority);
 538 }
 539
 540
 541 void CtdlUnregisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType)
 542 {
 543         TDAPVetoHookFunctionHook *cur, *p, *last;
 544         last = NULL;
 545         cur = TDAPVetoHookTable;
 546         while  (cur != NULL) {
 547                 if ((fcn_ptr == cur->h_function_pointer) &&
 548                     (EventType == cur->eventtype))
 549                 {
 550                         MOD_syslog(LOG_DEBUG, "Unregistered TDAP Veto function (type %d)\n",
 551                                    EventType);
 552                         p = cur->next;
 553
 554                         free(cur);
 555                         cur = NULL;
 556
 557                         if (last != NULL)
 558                                 last->next = p;
 559                         else
 560                                 TDAPVetoHookTable = p;
 561                         cur = p;
 562                 }
 563                 else {
 564                         last = cur;
 565                         cur = cur->next;
 566                 }
 567         }
 568 }
 569
 570 void CtdlDestroyTDAPVetoHooks(void)
 571 {
 572         TDAPVetoHookFunctionHook *cur, *p;
 573
 574         cur = TDAPVetoHookTable;
 575         while (cur != NULL)
 576         {
 577                 MODM_syslog(LOG_DEBUG, "Destroyed TDAP Veto function\n");
 578                 p = cur->next;
 579                 free(cur);
 580                 cur = p;
 581         }
 582         TDAPVetoHookTable = NULL;
 583 }
 584
 585
 586 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType, int Priority)
 587 {
 588         SessionFunctionHook *newfcn;
 589
 590         newfcn = (SessionFunctionHook *)
 591             malloc(sizeof(SessionFunctionHook));
 592         newfcn->Priority = Priority;
 593         newfcn->h_function_pointer = fcn_ptr;
 594         newfcn->eventtype = EventType;
 595
 596         SessionFunctionHook **pfcn;
 597         pfcn = &SessionHookTable;
 598         while ((*pfcn != NULL) &&
 599                ((*pfcn)->Priority < newfcn->Priority) &&
 600                ((*pfcn)->next != NULL))
 601                 pfcn = &(*pfcn)->next;
 602
 603         newfcn->next = *pfcn;
 604         *pfcn = newfcn;
 605
 606         MOD_syslog(LOG_DEBUG, "Registered a new session function (type %d Priority %d)\n",
 607                    EventType, Priority);
 608 }
 609
 610
 611 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 612 {
 613         SessionFunctionHook *cur, *p, *last;
 614         last = NULL;
 615         cur = SessionHookTable;
 616         while  (cur != NULL) {
 617                 if ((fcn_ptr == cur->h_function_pointer) &&
 618                     (EventType == cur->eventtype))
 619                 {
 620                         MOD_syslog(LOG_DEBUG, "Unregistered session function (type %d)\n",
 621                                    EventType);
 622                         p = cur->next;
 623
 624                         free(cur);
 625                         cur = NULL;
 626
 627                         if (last != NULL)
 628                                 last->next = p;
 629                         else
 630                                 SessionHookTable = p;
 631                         cur = p;
 632                 }
 633                 else {
 634                         last = cur;
 635                         cur = cur->next;
 636                 }
 637         }
 638 }
 639
 640 void CtdlDestroySessionHooks(void)
 641 {
 642         SessionFunctionHook *cur, *p;
 643
 644         cur = SessionHookTable;
 645         while (cur != NULL)
 646         {
 647                 MODM_syslog(LOG_DEBUG, "Destroyed session function\n");
 648                 p = cur->next;
 649                 free(cur);
 650                 cur = p;
 651         }
 652         SessionHookTable = NULL;
 653 }
 654
 655
 656 void CtdlRegisterUserHook(void (*fcn_ptr) (ctdluser *), int EventType)
 657 {
 658
 659         UserFunctionHook *newfcn;
 660
 661         newfcn = (UserFunctionHook *)
 662             malloc(sizeof(UserFunctionHook));
 663         newfcn->next = UserHookTable;
 664         newfcn->h_function_pointer = fcn_ptr;
 665         newfcn->eventtype = EventType;
 666         UserHookTable = newfcn;
 667
 668         MOD_syslog(LOG_DEBUG, "Registered a new user function (type %d)\n",
 669                    EventType);
 670 }
 671
 672
 673 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 674 {
 675         UserFunctionHook *cur, *p, *last;
 676         last = NULL;
 677         cur = UserHookTable;
 678         while (cur != NULL) {
 679                 if ((fcn_ptr == cur->h_function_pointer) &&
 680                     (EventType == cur->eventtype))
 681                 {
 682                         MOD_syslog(LOG_DEBUG, "Unregistered user function (type %d)\n",
 683                                    EventType);
 684                         p = cur->next;
 685
 686                         free(cur);
 687                         cur = NULL;
 688
 689                         if (last != NULL)
 690                                 last->next = p;
 691                         else
 692                                 UserHookTable = p;
 693                         cur = p;
 694                 }
 695                 else {
 696                         last = cur;
 697                         cur = cur->next;
 698                 }
 699         }
 700 }
 701
 702 void CtdlDestroyUserHooks(void)
 703 {
 704         UserFunctionHook *cur, *p;
 705
 706         cur = UserHookTable;
 707         while (cur != NULL)
 708         {
 709                 MODM_syslog(LOG_DEBUG, "Destroyed user function \n");
 710                 p = cur->next;
 711                 free(cur);
 712                 cur = p;
 713         }
 714         UserHookTable = NULL;
 715 }
 716
 717
 718 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *, recptypes *),
 719                                 int EventType)
 720 {
 721
 722         MessageFunctionHook *newfcn;
 723
 724         newfcn = (MessageFunctionHook *)
 725             malloc(sizeof(MessageFunctionHook));
 726         newfcn->next = MessageHookTable;
 727         newfcn->h_function_pointer = handler;
 728         newfcn->eventtype = EventType;
 729         MessageHookTable = newfcn;
 730
 731         MOD_syslog(LOG_DEBUG, "Registered a new message function (type %d)\n",
 732                    EventType);
 733 }
 734
 735
 736 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *, recptypes *),
 737                 int EventType)
 738 {
 739         MessageFunctionHook *cur, *p, *last;
 740         last = NULL;
 741         cur = MessageHookTable;
 742         while (cur != NULL) {
 743                 if ((handler == cur->h_function_pointer) &&
 744                     (EventType == cur->eventtype))
 745                 {
 746                         MOD_syslog(LOG_DEBUG, "Unregistered message function (type %d)\n",
 747                                    EventType);
 748                         p = cur->next;
 749                         free(cur);
 750                         cur = NULL;
 751
 752                         if (last != NULL)
 753                                 last->next = p;
 754                         else
 755                                 MessageHookTable = p;
 756                         cur = p;
 757                 }
 758                 else {
 759                         last = cur;
 760                         cur = cur->next;
 761                 }
 762         }
 763 }
 764
 765 void CtdlDestroyMessageHook(void)
 766 {
 767         MessageFunctionHook *cur, *p;
 768
 769         cur = MessageHookTable;
 770         while (cur != NULL)
 771         {
 772                 MOD_syslog(LOG_DEBUG, "Destroyed message function (type %d)\n", cur->eventtype);
 773                 p = cur->next;
 774                 free(cur);
 775                 cur = p;
 776         }
 777         MessageHookTable = NULL;
 778 }
 779
 780
 781 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 782 {
 783         RoomFunctionHook *newfcn;
 784
 785         newfcn = (RoomFunctionHook *)
 786             malloc(sizeof(RoomFunctionHook));
 787         newfcn->next = RoomHookTable;
 788         newfcn->fcn_ptr = fcn_ptr;
 789         RoomHookTable = newfcn;
 790
 791         MODM_syslog(LOG_DEBUG, "Registered a new room function\n");
 792 }
 793
 794
 795 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 796 {
 797         RoomFunctionHook *cur, *p, *last;
 798         last = NULL;
 799         cur = RoomHookTable;
 800         while (cur != NULL)
 801         {
 802                 if (fcn_ptr == cur->fcn_ptr) {
 803                         MODM_syslog(LOG_DEBUG, "Unregistered room function\n");
 804                         p = cur->next;
 805
 806                         free(cur);
 807                         cur = NULL;
 808
 809                         if (last != NULL)
 810                                 last->next = p;
 811                         else
 812                                 RoomHookTable = p;
 813                         cur = p;
 814                 }
 815                 else {
 816                         last = cur;
 817                         cur = cur->next;
 818                 }
 819         }
 820 }
 821
 822
 823 void CtdlDestroyRoomHooks(void)
 824 {
 825         RoomFunctionHook *cur, *p;
 826
 827         cur = RoomHookTable;
 828         while (cur != NULL)
 829         {
 830                 MODM_syslog(LOG_DEBUG, "Destroyed room function\n");
 831                 p = cur->next;
 832                 free(cur);
 833                 cur = p;
 834         }
 835         RoomHookTable = NULL;
 836 }
 837
 838 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 839 {
 840         NetprocFunctionHook *newfcn;
 841
 842         newfcn = (NetprocFunctionHook *)
 843             malloc(sizeof(NetprocFunctionHook));
 844         newfcn->next = NetprocHookTable;
 845         newfcn->h_function_pointer = handler;
 846         NetprocHookTable = newfcn;
 847
 848         MODM_syslog(LOG_DEBUG, "Registered a new netproc function\n");
 849 }
 850
 851
 852 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 853 {
 854         NetprocFunctionHook *cur, *p, *last;
 855
 856         cur = NetprocHookTable;
 857         last = NULL;
 858
 859         while (cur != NULL) {
 860                 if (handler == cur->h_function_pointer)
 861                 {
 862                         MODM_syslog(LOG_DEBUG, "Unregistered netproc function\n");
 863                         p = cur->next;
 864                         free(cur);
 865                         if (last != NULL) {
 866                                 last->next = p;
 867                         }
 868                         else {
 869                                 NetprocHookTable = p;
 870                         }
 871                         cur = p;
 872                 }
 873                 else {
 874                         last = cur;
 875                         cur = cur->next;
 876                 }
 877         }
 878 }
 879
 880 void CtdlDestroyNetprocHooks(void)
 881 {
 882         NetprocFunctionHook *cur, *p;
 883
 884         cur = NetprocHookTable;
 885         while (cur != NULL)
 886         {
 887                 MODM_syslog(LOG_DEBUG, "Destroyed netproc function\n");
 888                 p = cur->next;
 889                 free(cur);
 890                 cur = p;
 891         }
 892         NetprocHookTable = NULL;
 893 }
 894
 895
 896 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 897 {
 898         DeleteFunctionHook *newfcn;
 899
 900         newfcn = (DeleteFunctionHook *)
 901             malloc(sizeof(DeleteFunctionHook));
 902         newfcn->next = DeleteHookTable;
 903         newfcn->h_function_pointer = handler;
 904         DeleteHookTable = newfcn;
 905
 906         MODM_syslog(LOG_DEBUG, "Registered a new delete function\n");
 907 }
 908
 909
 910 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 911 {
 912         DeleteFunctionHook *cur, *p, *last;
 913
 914         last = NULL;
 915         cur = DeleteHookTable;
 916         while (cur != NULL) {
 917                 if (handler == cur->h_function_pointer )
 918                 {
 919                         MODM_syslog(LOG_DEBUG, "Unregistered delete function\n");
 920                         p = cur->next;
 921                         free(cur);
 922
 923                         if (last != NULL)
 924                                 last->next = p;
 925                         else
 926                                 DeleteHookTable = p;
 927
 928                         cur = p;
 929                 }
 930                 else {
 931                         last = cur;
 932                         cur = cur->next;
 933                 }
 934         }
 935 }
 936 void CtdlDestroyDeleteHooks(void)
 937 {
 938         DeleteFunctionHook *cur, *p;
 939
 940         cur = DeleteHookTable;
 941         while (cur != NULL)
 942         {
 943                 MODM_syslog(LOG_DEBUG, "Destroyed delete function\n");
 944                 p = cur->next;
 945                 free(cur);
 946                 cur = p;
 947         }
 948         DeleteHookTable = NULL;
 949 }
 950
 951
 952
 953
 954 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
 955 {
 956         FixedOutputHook *newfcn;
 957
 958         newfcn = (FixedOutputHook *)
 959             malloc(sizeof(FixedOutputHook));
 960         newfcn->next = FixedOutputTable;
 961         newfcn->h_function_pointer = handler;
 962         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
 963         FixedOutputTable = newfcn;
 964
 965         MOD_syslog(LOG_DEBUG, "Registered a new fixed output function for %s\n", newfcn->content_type);
 966 }
 967
 968
 969 void CtdlUnregisterFixedOutputHook(char *content_type)
 970 {
 971         FixedOutputHook *cur, *p, *last;
 972
 973         last = NULL;
 974         cur = FixedOutputTable;
 975         while (cur != NULL) {
 976                 /* This will also remove duplicates if any */
 977                 if (!strcasecmp(content_type, cur->content_type)) {
 978                         MOD_syslog(LOG_DEBUG,
 979                                    "Unregistered fixed output function for %s\n",
 980                                    content_type);
 981
 982                         p = cur->next;
 983                         free(cur);
 984
 985                         if (last != NULL)
 986                                 last->next = p;
 987                         else
 988                                 FixedOutputTable = p;
 989
 990                         cur = p;
 991                 }
 992                 else
 993                 {
 994                         last = cur;
 995                         cur = cur->next;
 996                 }
 997         }
 998 }
 999
1000 void CtdlDestroyFixedOutputHooks(void)
1001 {
1002         FixedOutputHook *cur, *p;
1003
1004         cur = FixedOutputTable;
1005         while (cur != NULL)
1006         {
1007                 MOD_syslog(LOG_DEBUG, "Destroyed fixed output function for %s\n", cur->content_type);
1008                 p = cur->next;
1009                 free(cur);
1010                 cur = p;
1011
1012         }
1013         FixedOutputTable = NULL;
1014 }
1015
1016 /* returns nonzero if we found a hook and used it */
1017 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
1018 {
1019         FixedOutputHook *fcn;
1020
1021         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
1022                 if (!strcasecmp(content_type, fcn->content_type)) {
1023                         (*fcn->h_function_pointer) (content, content_length);
1024                         return(1);
1025                 }
1026         }
1027         return(0);
1028 }
1029
1030
1031
1032
1033
1034 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1035 {
1036
1037         XmsgFunctionHook *newfcn;
1038
1039         newfcn = (XmsgFunctionHook *) malloc(sizeof(XmsgFunctionHook));
1040         newfcn->next = XmsgHookTable;
1041         newfcn->order = order;
1042         newfcn->h_function_pointer = fcn_ptr;
1043         XmsgHookTable = newfcn;
1044         MOD_syslog(LOG_DEBUG, "Registered a new x-msg function (priority %d)\n", order);
1045 }
1046
1047
1048 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1049 {
1050         XmsgFunctionHook *cur, *p, *last;
1051
1052         last = NULL;
1053         cur = XmsgHookTable;
1054         while (cur != NULL) {
1055                 /* This will also remove duplicates if any */
1056                 if (fcn_ptr == cur->h_function_pointer &&
1057                     order == cur->order) {
1058                         MOD_syslog(LOG_DEBUG, "Unregistered x-msg function "
1059                                    "(priority %d)\n", order);
1060                         p = cur->next;
1061                         free(cur);
1062
1063                         if (last != NULL)
1064                                 last->next = p;
1065                         else
1066                                 XmsgHookTable = p;
1067
1068                         cur = p;
1069                 }
1070                 else {
1071                         last = cur;
1072                         cur = cur->next;
1073                 }
1074         }
1075 }
1076
1077 void CtdlDestroyXmsgHooks(void)
1078 {
1079         XmsgFunctionHook *cur, *p;
1080
1081         cur = XmsgHookTable;
1082         while (cur != NULL)
1083         {
1084                 MOD_syslog(LOG_DEBUG, "Destroyed x-msg function "
1085                         "(priority %d)\n", cur->order);
1086                 p = cur->next;
1087
1088                 free(cur);
1089                 cur = p;
1090         }
1091         XmsgHookTable = NULL;
1092 }
1093
1094
1095 void CtdlRegisterServiceHook(int tcp_port,
1096                              char *sockpath,
1097                              void (*h_greeting_function) (void),
1098                              void (*h_command_function) (void),
1099                              void (*h_async_function) (void),
1100                              const char *ServiceName)
1101 {
1102         ServiceFunctionHook *newfcn;
1103         char *message;
1104         char error[SIZ];
1105
1106         strcpy(error, "");
1107         newfcn = (ServiceFunctionHook *) malloc(sizeof(ServiceFunctionHook));
1108         message = (char*) malloc (SIZ + SIZ);
1109
1110         newfcn->next = ServiceHookTable;
1111         newfcn->tcp_port = tcp_port;
1112         newfcn->sockpath = sockpath;
1113         newfcn->h_greeting_function = h_greeting_function;
1114         newfcn->h_command_function = h_command_function;
1115         newfcn->h_async_function = h_async_function;
1116         newfcn->ServiceName = ServiceName;
1117
1118         if (sockpath != NULL) {
1119                 newfcn->msock = ctdl_uds_server(sockpath, CtdlGetConfigInt("c_maxsessions"), error);
1120                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
1121         }
1122         else if (tcp_port <= 0) {       /* port -1 to disable */
1123                 MOD_syslog(LOG_INFO, "Service %s has been manually disabled, skipping\n", ServiceName);
1124                 free (message);
1125                 free(newfcn);
1126                 return;
1127         }
1128         else {
1129                 newfcn->msock = ctdl_tcp_server(CtdlGetConfigStr("c_ip_addr"),
1130                                               tcp_port,
1131                                               CtdlGetConfigInt("c_maxsessions"),
1132                                               error);
1133                 snprintf(message, SIZ, "TCP port %s:%d: (%s) ",
1134                          CtdlGetConfigStr("c_ip_addr"), tcp_port, ServiceName);
1135         }
1136
1137         if (newfcn->msock > 0) {
1138                 ServiceHookTable = newfcn;
1139                 strcat(message, "registered.");
1140                 MOD_syslog(LOG_INFO, "%s\n", message);
1141         }
1142         else {
1143                 AddPortError(message, error);
1144                 strcat(message, "FAILED.");
1145                 MOD_syslog(LOG_CRIT, "%s\n", message);
1146                 free(newfcn);
1147         }
1148         free(message);
1149 }
1150
1151
1152 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
1153                         void (*h_greeting_function) (void),
1154                         void (*h_command_function) (void),
1155                         void (*h_async_function) (void)
1156                         )
1157 {
1158         ServiceFunctionHook *cur, *p, *last;
1159
1160         last = NULL;
1161         cur = ServiceHookTable;
1162         while (cur != NULL) {
1163                 /* This will also remove duplicates if any */
1164                 if (h_greeting_function == cur->h_greeting_function &&
1165                     h_command_function == cur->h_command_function &&
1166                     h_async_function == cur->h_async_function &&
1167                     tcp_port == cur->tcp_port &&
1168                     !(sockpath && cur->sockpath && strcmp(sockpath, cur->sockpath)) )
1169                 {
1170                         if (cur->msock > 0)
1171                                 close(cur->msock);
1172                         if (sockpath) {
1173                                 MOD_syslog(LOG_INFO, "Closed UNIX domain socket %s\n",
1174                                            sockpath);
1175                                 unlink(sockpath);
1176                         } else if (tcp_port) {
1177                                 MOD_syslog(LOG_INFO, "Closed TCP port %d\n", tcp_port);
1178                         } else {
1179                                 MOD_syslog(LOG_INFO, "Unregistered service \"%s\"\n", cur->ServiceName);
1180                         }
1181                         p = cur->next;
1182                         free(cur);
1183                         if (last != NULL)
1184                                 last->next = p;
1185                         else
1186                                 ServiceHookTable = p;
1187                         cur = p;
1188                 }
1189                 else {
1190                         last = cur;
1191                         cur = cur->next;
1192                 }
1193         }
1194 }
1195
1196
1197 void CtdlShutdownServiceHooks(void)
1198 {
1199         /* sort of a duplicate of close_masters() but called earlier */
1200         ServiceFunctionHook *cur;
1201
1202         cur = ServiceHookTable;
1203         while (cur != NULL)
1204         {
1205                 if (cur->msock != -1)
1206                 {
1207                         close(cur->msock);
1208                         cur->msock = -1;
1209                         if (cur->sockpath != NULL){
1210                                 MOD_syslog(LOG_INFO, "[%s] Closed UNIX domain socket %s\n",
1211                                            cur->ServiceName,
1212                                            cur->sockpath);
1213                                 unlink(cur->sockpath);
1214                         } else {
1215                                 MOD_syslog(LOG_INFO, "[%s] closing service\n",
1216                                            cur->ServiceName);
1217                         }
1218                 }
1219                 cur = cur->next;
1220         }
1221 }
1222
1223 void CtdlDestroyServiceHook(void)
1224 {
1225         const char *Text;
1226         ServiceFunctionHook *cur, *p;
1227
1228         cur = ServiceHookTable;
1229         while (cur != NULL)
1230         {
1231                 if (cur->msock != -1)
1232                 {
1233                         close(cur->msock);
1234                         Text = "Closed";
1235                 }
1236                 else
1237                 {
1238                         Text = " Not closing again";
1239                 }
1240
1241                 if (cur->sockpath) {
1242                         MOD_syslog(LOG_INFO, "%s UNIX domain socket %s\n",
1243                                    Text,
1244                                    cur->sockpath);
1245                         unlink(cur->sockpath);
1246                 } else if (cur->tcp_port) {
1247                         MOD_syslog(LOG_INFO, "%s TCP port %d\n", Text, cur->tcp_port);
1248                 } else {
1249                         MOD_syslog(LOG_INFO, "Destroyed service \"%s\"\n", cur->ServiceName);
1250                 }
1251                 p = cur->next;
1252                 free(cur);
1253                 cur = p;
1254         }
1255         ServiceHookTable = NULL;
1256 }
1257
1258 void CtdlRegisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1259 {
1260         SearchFunctionHook *newfcn;
1261
1262         if (!name || !fcn_ptr) {
1263                 return;
1264         }
1265
1266         newfcn = (SearchFunctionHook *)
1267             malloc(sizeof(SearchFunctionHook));
1268         newfcn->next = SearchFunctionHookTable;
1269         newfcn->name = name;
1270         newfcn->fcn_ptr = fcn_ptr;
1271         SearchFunctionHookTable = newfcn;
1272
1273         MOD_syslog(LOG_DEBUG, "Registered a new search function (%s)\n", name);
1274 }
1275
1276 void CtdlUnregisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1277 {
1278         SearchFunctionHook *cur, *p, *last;
1279
1280         last = NULL;
1281         cur = SearchFunctionHookTable;
1282         while (cur != NULL) {
1283                 if (fcn_ptr &&
1284                     (cur->fcn_ptr == fcn_ptr) &&
1285                     name && !strcmp(name, cur->name))
1286                 {
1287                         MOD_syslog(LOG_DEBUG, "Unregistered search function(%s)\n", name);
1288                         p = cur->next;
1289                         free (cur);
1290                         if (last != NULL)
1291                                 last->next = p;
1292                         else
1293                                 SearchFunctionHookTable = p;
1294                         cur = p;
1295                 }
1296                 else {
1297                         last = cur;
1298                         cur = cur->next;
1299                 }
1300         }
1301 }
1302
1303 void CtdlDestroySearchHooks(void)
1304 {
1305         SearchFunctionHook *cur, *p;
1306
1307         cur = SearchFunctionHookTable;
1308         SearchFunctionHookTable = NULL;
1309         while (cur != NULL) {
1310                 p = cur->next;
1311                 free(cur);
1312                 cur = p;
1313         }
1314 }
1315
1316 void CtdlModuleDoSearch(int *num_msgs, long **search_msgs, const char *search_string, const char *func_name)
1317 {
1318         SearchFunctionHook *fcn = NULL;
1319
1320         for (fcn = SearchFunctionHookTable; fcn != NULL; fcn = fcn->next) {
1321                 if (!func_name || !strcmp(func_name, fcn->name)) {
1322                         (*fcn->fcn_ptr) (num_msgs, search_msgs, search_string);
1323                         return;
1324                 }
1325         }
1326         *num_msgs = 0;
1327 }
1328
1329 int CheckTDAPVeto (int DBType, StrBuf *ErrMsg)
1330 {
1331         int Result = 0;
1332         TDAPVetoHookFunctionHook *fcn = NULL;
1333
1334         for (fcn = TDAPVetoHookTable; (fcn != NULL) && (Result == 0); fcn = fcn->next) {
1335                 if (fcn->eventtype == DBType) {
1336                         Result = (*fcn->h_function_pointer) (ErrMsg);
1337                 }
1338         }
1339         return Result;
1340 }
1341
1342 void PerformSessionHooks(int EventType)
1343 {
1344         SessionFunctionHook *fcn = NULL;
1345
1346         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
1347                 if (fcn->eventtype == EventType) {
1348                         if (EventType == EVT_TIMER) {
1349                                 pthread_setspecific(MyConKey, NULL);    /* for every hook */
1350                         }
1351                         (*fcn->h_function_pointer) ();
1352                 }
1353         }
1354 }
1355
1356 void PerformUserHooks(ctdluser *usbuf, int EventType)
1357 {
1358         UserFunctionHook *fcn = NULL;
1359
1360         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
1361                 if (fcn->eventtype == EventType) {
1362                         (*fcn->h_function_pointer) (usbuf);
1363                 }
1364         }
1365 }
1366
1367 int PerformMessageHooks(struct CtdlMessage *msg, recptypes *recps, int EventType)
1368 {
1369         MessageFunctionHook *fcn = NULL;
1370         int total_retval = 0;
1371
1372         /* Other code may elect to protect this message from server-side
1373          * handlers; if this is the case, don't do anything.
1374         MOD_syslog(LOG_DEBUG, "** Event type is %d, flags are %d\n", EventType, msg->cm_flags);
1375          */
1376         if (msg->cm_flags & CM_SKIP_HOOKS) {
1377                 MODM_syslog(LOG_DEBUG, "Skipping hooks\n");
1378                 return(0);
1379         }
1380
1381         /* Otherwise, run all the hooks appropriate to this event type.
1382          */
1383         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
1384                 if (fcn->eventtype == EventType) {
1385                         total_retval = total_retval + (*fcn->h_function_pointer) (msg, recps);
1386                 }
1387         }
1388
1389         /* Return the sum of the return codes from the hook functions.  If
1390          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
1391          * the save operation to abort.
1392          */
1393         return total_retval;
1394 }
1395
1396
1397 int PerformRoomHooks(struct ctdlroom *target_room)
1398 {
1399         RoomFunctionHook *fcn;
1400         int total_retval = 0;
1401
1402         MOD_syslog(LOG_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
1403
1404         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
1405                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
1406         }
1407
1408         /* Return the sum of the return codes from the hook functions.
1409          */
1410         return total_retval;
1411 }
1412
1413
1414 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
1415 {
1416         NetprocFunctionHook *fcn;
1417         int total_retval = 0;
1418
1419         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
1420                 total_retval = total_retval +
1421                         (*fcn->h_function_pointer) (msg, target_room);
1422         }
1423
1424         /* Return the sum of the return codes from the hook functions.
1425          * A nonzero return code will cause the message to *not* be imported.
1426          */
1427         return total_retval;
1428 }
1429
1430
1431 void PerformDeleteHooks(char *room, long msgnum)
1432 {
1433         DeleteFunctionHook *fcn;
1434
1435         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
1436                 (*fcn->h_function_pointer) (room, msgnum);
1437         }
1438 }
1439
1440
1441
1442
1443
1444 int PerformXmsgHooks(char *sender, char *sender_email, char *recp, char *msg)
1445 {
1446         XmsgFunctionHook *fcn;
1447         int total_sent = 0;
1448         int p;
1449
1450         for (p=0; p<MAX_XMSG_PRI; ++p) {
1451                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1452                         if (fcn->order == p) {
1453                                 total_sent +=
1454                                         (*fcn->h_function_pointer)
1455                                                 (sender, sender_email, recp, msg);
1456                         }
1457                 }
1458                 /* Break out of the loop if a higher-priority function
1459                  * successfully delivered the message.  This prevents duplicate
1460                  * deliveries to local users simultaneously signed onto
1461                  * remote services.
1462                  */
1463                 if (total_sent) break;
1464         }
1465         return total_sent;
1466 }
1467
1468
1469 /*
1470  * Dirty hack until we impliment a hook mechanism for this
1471  */
1472 void CtdlModuleStartCryptoMsgs(char *ok_response, char *nosup_response, char *error_response)
1473 {
1474 #ifdef HAVE_OPENSSL
1475         CtdlStartTLS (ok_response, nosup_response, error_response);
1476 #endif
1477 }
1478
1479 void DebugModulesEnable(const int n)
1480 {
1481         DebugModules = n;
1482 }
1483 CTDL_MODULE_INIT(modules)
1484 {
1485         if (!threading) {
1486                 CtdlRegisterDebugFlagHook(HKEY("modules"), DebugModulesEnable, &DebugModules);
1487         }
1488         return "modules";
1489 }