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 int EnableMarkers = 0;
  29 int EnableCtlProto = 0;
  30
  31 /*
  32  * Structure defentitions for hook tables
  33  */
  34
  35 HashList *LogDebugEntryTable = NULL;
  36
  37 typedef struct LogFunctionHook LogFunctionHook;
  38 struct LogFunctionHook {
  39         LogFunctionHook *next;
  40         int loglevel;
  41         void (*h_function_pointer) (char *);
  42 };
  43
  44 LogFunctionHook *LogHookTable = NULL;
  45
  46 typedef struct FixedOutputHook FixedOutputHook;
  47 struct FixedOutputHook {
  48         FixedOutputHook *next;
  49         char content_type[64];
  50         void (*h_function_pointer) (char *, int);
  51 };
  52 FixedOutputHook *FixedOutputTable = NULL;
  53
  54
  55
  56 /*
  57  * TDAPVetoHookFunctionHook extensions are used for any type of hook for which
  58  * may prevent the autopurger to run for this specific data class.
  59  * the function should at least LOG_INFO that it does so.
  60  */
  61 typedef struct TDAPVetoHookFunctionHook TDAPVetoHookFunctionHook;
  62 struct TDAPVetoHookFunctionHook {
  63         TDAPVetoHookFunctionHook *next;
  64         int Priority;
  65         int (*h_function_pointer) (StrBuf *);
  66         int eventtype;
  67 };
  68 TDAPVetoHookFunctionHook *TDAPVetoHookTable = NULL;
  69
  70
  71
  72 /*
  73  * SessionFunctionHook extensions are used for any type of hook for which
  74  * the context in which it's being called (which is determined by the event
  75  * type) will make it obvious for the hook function to know where to look for
  76  * pertinent data.
  77  */
  78 typedef struct SessionFunctionHook SessionFunctionHook;
  79 struct SessionFunctionHook {
  80         SessionFunctionHook *next;
  81         int Priority;
  82         void (*h_function_pointer) (void);
  83         int eventtype;
  84 };
  85 SessionFunctionHook *SessionHookTable = NULL;
  86
  87 /*
  88  * UserFunctionHook extensions are used for any type of hook which implements
  89  * an operation on a user or username (potentially) other than the one
  90  * operating the current session.
  91  */
  92 typedef struct UserFunctionHook UserFunctionHook;
  93 struct UserFunctionHook {
  94         UserFunctionHook *next;
  95         void (*h_function_pointer) (struct ctdluser *usbuf);
  96         int eventtype;
  97 };
  98 UserFunctionHook *UserHookTable = NULL;
  99
 100 /*
 101  * MessageFunctionHook extensions are used for hooks which implement handlers
 102  * for various types of message operations (save, read, etc.)
 103  */
 104 typedef struct MessageFunctionHook MessageFunctionHook;
 105 struct MessageFunctionHook {
 106         MessageFunctionHook *next;
 107         int (*h_function_pointer) (struct CtdlMessage *msg, recptypes *recps);
 108         int eventtype;
 109 };
 110 MessageFunctionHook *MessageHookTable = NULL;
 111
 112
 113 /*
 114  * NetprocFunctionHook extensions are used for hooks which implement handlers
 115  * for incoming network messages.
 116  */
 117 typedef struct NetprocFunctionHook NetprocFunctionHook;
 118 struct NetprocFunctionHook {
 119         NetprocFunctionHook *next;
 120         int (*h_function_pointer) (struct CtdlMessage *msg, char *target_room);
 121 };
 122 NetprocFunctionHook *NetprocHookTable = NULL;
 123
 124
 125 /*
 126  * DeleteFunctionHook extensions are used for hooks which get called when a
 127  * message is about to be deleted.
 128  */
 129 typedef struct DeleteFunctionHook DeleteFunctionHook;
 130 struct DeleteFunctionHook {
 131         DeleteFunctionHook *next;
 132         void (*h_function_pointer) (char *target_room, long msgnum);
 133 };
 134 DeleteFunctionHook *DeleteHookTable = NULL;
 135
 136
 137 /*
 138  * ExpressMessageFunctionHook extensions are used for hooks which implement
 139  * the sending of an instant message through various channels.  Any function
 140  * registered should return the number of recipients to whom the message was
 141  * successfully transmitted.
 142  */
 143 typedef struct XmsgFunctionHook XmsgFunctionHook;
 144 struct XmsgFunctionHook {
 145         XmsgFunctionHook *next;
 146         int (*h_function_pointer) (char *, char *, char *, char *);
 147         int order;
 148 };
 149 XmsgFunctionHook *XmsgHookTable = NULL;
 150
 151
 152
 153
 154 /*
 155  * RoomFunctionHook extensions are used for hooks which impliment room
 156  * processing functions when new messages are added EG. SIEVE.
 157  */
 158 typedef struct RoomFunctionHook RoomFunctionHook;
 159 struct RoomFunctionHook {
 160         RoomFunctionHook *next;
 161         int (*fcn_ptr) (struct ctdlroom *);
 162 };
 163 RoomFunctionHook *RoomHookTable = NULL;
 164
 165
 166
 167 typedef struct SearchFunctionHook SearchFunctionHook;
 168 struct SearchFunctionHook {
 169         SearchFunctionHook *next;
 170         void (*fcn_ptr) (int *, long **, const char *);
 171         char *name;
 172 };
 173 SearchFunctionHook *SearchFunctionHookTable = NULL;
 174
 175 CleanupFunctionHook *CleanupHookTable = NULL;
 176 CleanupFunctionHook *EVCleanupHookTable = NULL;
 177
 178 ServiceFunctionHook *ServiceHookTable = NULL;
 179
 180 typedef struct ProtoFunctionHook ProtoFunctionHook;
 181 struct ProtoFunctionHook {
 182         void (*handler) (char *cmdbuf);
 183         const char *cmd;
 184         const char *desc;
 185 };
 186
 187 HashList *ProtoHookList = NULL;
 188
 189
 190 #define ERR_PORT (1 << 1)
 191
 192
 193 static StrBuf *portlist = NULL;
 194
 195 static StrBuf *errormessages = NULL;
 196
 197
 198 long   DetailErrorFlags;
 199 ConstStr Empty = {HKEY("")};
 200 char *ErrSubject = "Startup Problems";
 201 ConstStr ErrGeneral[] = {
 202         {HKEY("Citadel had trouble on starting up. ")},
 203         {HKEY(" This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
 204               "If you don't want citadel to provide these services, turn them off in WebCit via: ")},
 205         {HKEY("To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
 206               "The errors returned by the system were:\n")},
 207         {HKEY("You can recheck the above if you follow this faq item:\n"
 208               "http://www.citadel.org/doku.php?id=faq:mastering_your_os:net#netstat")}
 209 };
 210
 211 ConstStr ErrPortShort = { HKEY("We couldn't bind all ports you configured to be provided by citadel server.\n")};
 212 ConstStr ErrPortWhere = { HKEY("\"Admin->System Preferences->Network\".\n\nThe failed ports and sockets are: ")};
 213 ConstStr ErrPortHint  = { HKEY("If you want citadel to provide you with that functionality, "
 214                                "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
 215                                " and stop the program that binds these ports.\n You should eventually remove "
 216                                " their initscripts in /etc/init.d so that you won't get this trouble once more.\n"
 217                                " After that goto \"Administration -> Shutdown Citadel\" to make Citadel restart & retry to bind this port.\n")};
 218
 219
 220 void LogPrintMessages(long err)
 221 {
 222         StrBuf *Message;
 223         StrBuf *List, *DetailList;
 224         ConstStr *Short, *Where, *Hint;
 225
 226
 227         Message = NewStrBufPlain(NULL,
 228                                  StrLength(portlist) + StrLength(errormessages));
 229
 230         DetailErrorFlags = DetailErrorFlags & ~err;
 231
 232         switch (err)
 233         {
 234         case ERR_PORT:
 235                 Short = &ErrPortShort;
 236                 Where = &ErrPortWhere;
 237                 Hint  = &ErrPortHint;
 238                 List  = portlist;
 239                 DetailList = errormessages;
 240                 break;
 241         default:
 242                 Short = &Empty;
 243                 Where = &Empty;
 244                 Hint  = &Empty;
 245                 List  = NULL;
 246                 DetailList = NULL;
 247         }
 248
 249         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[0]), 0);
 250         StrBufAppendBufPlain(Message, CKEY(*Short), 0);
 251         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[1]), 0);
 252         StrBufAppendBufPlain(Message, CKEY(*Where), 0);
 253         StrBufAppendBuf(Message, List, 0);
 254         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 255         StrBufAppendBufPlain(Message, CKEY(*Hint), 0);
 256         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 257         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[2]), 0);
 258         StrBufAppendBuf(Message, DetailList, 0);
 259         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 260         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[3]), 0);
 261
 262         MOD_syslog(LOG_EMERG, "%s", ChrPtr(Message));
 263         MOD_syslog(LOG_EMERG, "%s", ErrSubject);
 264         quickie_message("Citadel", NULL, NULL, AIDEROOM, ChrPtr(Message), FMT_FIXED, ErrSubject);
 265
 266         FreeStrBuf(&Message);
 267         FreeStrBuf(&List);
 268         FreeStrBuf(&DetailList);
 269 }
 270
 271
 272 void AddPortError(char *Port, char *ErrorMessage)
 273 {
 274         long len;
 275
 276         DetailErrorFlags |= ERR_PORT;
 277
 278         len = StrLength(errormessages);
 279         if (len > 0) StrBufAppendBufPlain(errormessages, HKEY("; "), 0);
 280         else errormessages = NewStrBuf();
 281         StrBufAppendBufPlain(errormessages, ErrorMessage, -1, 0);
 282
 283
 284         len = StrLength(portlist);
 285         if (len > 0) StrBufAppendBufPlain(portlist, HKEY(";"), 0);
 286         else portlist = NewStrBuf();
 287         StrBufAppendBufPlain(portlist, Port, -1, 0);
 288 }
 289
 290
 291 int DLoader_Exec_Cmd(char *cmdbuf)
 292 {
 293         void *vP;
 294         ProtoFunctionHook *p;
 295
 296         if (GetHash(ProtoHookList, cmdbuf, 4, &vP) && (vP != NULL)) {
 297                 p = (ProtoFunctionHook*) vP;
 298                 p->handler(&cmdbuf[5]);
 299                 return 1;
 300         }
 301         return 0;
 302 }
 303
 304 void CtdlRegisterDebugFlagHook(const char *Name, long Len, CtdlDbgFunction F, const int *LogP)
 305 {
 306         LogDebugEntry *E;
 307         if (LogDebugEntryTable == NULL)
 308                 LogDebugEntryTable = NewHash(1, NULL);
 309         E = (LogDebugEntry*) malloc(sizeof(LogDebugEntry));
 310         E->F = F;
 311         E->Name = Name;
 312         E->Len = Len;
 313         E->LogP = LogP;
 314         Put(LogDebugEntryTable, Name, Len, E, NULL);
 315
 316 }
 317 void CtdlSetDebugLogFacilities(const char **Str, long n)
 318 {
 319         StrBuf *Token = NULL;
 320         StrBuf *Buf = NULL;
 321         const char *ch;
 322         int i;
 323         int DoAll = 0;
 324         void *vptr;
 325
 326         for (i=0; i < n; i++){
 327                 if ((Str[i] != NULL) && !IsEmptyStr(Str[i])) {
 328                         if (strcmp(Str[i], "all") == 0) {
 329                                 DoAll = 1;
 330                                 continue;
 331                         }
 332                         Buf = NewStrBufPlain(Str[i], -1);
 333                         ch = NULL;
 334                         if (Token == NULL)
 335                                 Token = NewStrBufPlain(NULL, StrLength(Buf));
 336                         while ((ch != StrBufNOTNULL) &&
 337                                StrBufExtract_NextToken(Token, Buf, &ch, ',')) {
 338                                 if (GetHash(LogDebugEntryTable, SKEY(Token), &vptr) &&
 339                                     (vptr != NULL))
 340                                 {
 341                                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 342                                         E->F(1);
 343                                 }
 344                         }
 345                 }
 346                 FreeStrBuf(&Buf);
 347         }
 348         FreeStrBuf(&Token);
 349         if (DoAll) {
 350                 long HKLen;
 351                 const char *ch;
 352                 HashPos *Pos;
 353
 354                 Pos = GetNewHashPos(LogDebugEntryTable, 0);
 355                 while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 356                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 357                         E->F(1);
 358                 }
 359
 360                 DeleteHashPos(&Pos);
 361         }
 362 }
 363 void CtdlDestroyDebugTable(void)
 364 {
 365
 366         DeleteHash(&LogDebugEntryTable);
 367 }
 368
 369 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 370 {
 371         ProtoFunctionHook *p;
 372
 373         if (ProtoHookList == NULL)
 374                 ProtoHookList = NewHash (1, FourHash);
 375
 376
 377         p = (ProtoFunctionHook *)
 378                 malloc(sizeof(ProtoFunctionHook));
 379
 380         if (p == NULL) {
 381                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 382                 exit(EXIT_FAILURE);
 383         }
 384         p->handler = handler;
 385         p->cmd = cmd;
 386         p->desc = desc;
 387
 388         Put(ProtoHookList, cmd, 4, p, NULL);
 389         MOD_syslog(LOG_DEBUG, "Registered server command %s (%s)\n", cmd, desc);
 390 }
 391
 392 void CtdlDestroyProtoHooks(void)
 393 {
 394
 395         DeleteHash(&ProtoHookList);
 396 }
 397
 398
 399 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 400 {
 401
 402         CleanupFunctionHook *newfcn;
 403
 404         newfcn = (CleanupFunctionHook *)
 405             malloc(sizeof(CleanupFunctionHook));
 406         newfcn->next = CleanupHookTable;
 407         newfcn->h_function_pointer = fcn_ptr;
 408         CleanupHookTable = newfcn;
 409
 410         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 411 }
 412
 413
 414 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 415 {
 416         CleanupFunctionHook *cur, *p, *last;
 417         last = NULL;
 418         cur = CleanupHookTable;
 419         while (cur != NULL)
 420         {
 421                 if (fcn_ptr == cur->h_function_pointer)
 422                 {
 423                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 424                         p = cur->next;
 425
 426                         free(cur);
 427                         cur = NULL;
 428
 429                         if (last != NULL)
 430                                 last->next = p;
 431                         else
 432                                 CleanupHookTable = p;
 433                         cur = p;
 434                 }
 435                 else {
 436                         last = cur;
 437                         cur = cur->next;
 438                 }
 439         }
 440 }
 441
 442
 443 void CtdlDestroyCleanupHooks(void)
 444 {
 445         CleanupFunctionHook *cur, *p;
 446
 447         cur = CleanupHookTable;
 448         while (cur != NULL)
 449         {
 450                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 451                 p = cur->next;
 452                 free(cur);
 453                 cur = p;
 454         }
 455         CleanupHookTable = NULL;
 456 }
 457
 458 void CtdlRegisterEVCleanupHook(void (*fcn_ptr) (void))
 459 {
 460
 461         CleanupFunctionHook *newfcn;
 462
 463         newfcn = (CleanupFunctionHook *)
 464             malloc(sizeof(CleanupFunctionHook));
 465         newfcn->next = EVCleanupHookTable;
 466         newfcn->h_function_pointer = fcn_ptr;
 467         EVCleanupHookTable = newfcn;
 468
 469         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 470 }
 471
 472
 473 void CtdlUnregisterEVCleanupHook(void (*fcn_ptr) (void))
 474 {
 475         CleanupFunctionHook *cur, *p, *last;
 476         last = NULL;
 477         cur = EVCleanupHookTable;
 478         while (cur != NULL)
 479         {
 480                 if (fcn_ptr == cur->h_function_pointer)
 481                 {
 482                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 483                         p = cur->next;
 484
 485                         free(cur);
 486                         cur = NULL;
 487
 488                         if (last != NULL)
 489                                 last->next = p;
 490                         else
 491                                 EVCleanupHookTable = p;
 492                         cur = p;
 493                 }
 494                 else {
 495                         last = cur;
 496                         cur = cur->next;
 497                 }
 498         }
 499 }
 500
 501
 502 void CtdlDestroyEVCleanupHooks(void)
 503 {
 504         CleanupFunctionHook *cur, *p;
 505
 506         cur = EVCleanupHookTable;
 507         while (cur != NULL)
 508         {
 509                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 510                 p = cur->next;
 511                 cur->h_function_pointer();
 512                 free(cur);
 513                 cur = p;
 514         }
 515         EVCleanupHookTable = NULL;
 516 }
 517
 518 void CtdlRegisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType, int Priority)
 519 {
 520         TDAPVetoHookFunctionHook *newfcn;
 521
 522         newfcn = (TDAPVetoHookFunctionHook *)
 523             malloc(sizeof(TDAPVetoHookFunctionHook));
 524         newfcn->Priority = Priority;
 525         newfcn->h_function_pointer = fcn_ptr;
 526         newfcn->eventtype = EventType;
 527
 528         TDAPVetoHookFunctionHook **pfcn;
 529         pfcn = &TDAPVetoHookTable;
 530         while ((*pfcn != NULL) &&
 531                ((*pfcn)->Priority < newfcn->Priority) &&
 532                ((*pfcn)->next != NULL))
 533                 pfcn = &(*pfcn)->next;
 534
 535         newfcn->next = *pfcn;
 536         *pfcn = newfcn;
 537
 538         MOD_syslog(LOG_DEBUG, "Registered a new TDAP Veto function (type %d Priority %d)\n",
 539                    EventType, Priority);
 540 }
 541
 542
 543 void CtdlUnregisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType)
 544 {
 545         TDAPVetoHookFunctionHook *cur, *p, *last;
 546         last = NULL;
 547         cur = TDAPVetoHookTable;
 548         while  (cur != NULL) {
 549                 if ((fcn_ptr == cur->h_function_pointer) &&
 550                     (EventType == cur->eventtype))
 551                 {
 552                         MOD_syslog(LOG_DEBUG, "Unregistered TDAP Veto function (type %d)\n",
 553                                    EventType);
 554                         p = cur->next;
 555
 556                         free(cur);
 557                         cur = NULL;
 558
 559                         if (last != NULL)
 560                                 last->next = p;
 561                         else
 562                                 TDAPVetoHookTable = p;
 563                         cur = p;
 564                 }
 565                 else {
 566                         last = cur;
 567                         cur = cur->next;
 568                 }
 569         }
 570 }
 571
 572 void CtdlDestroyTDAPVetoHooks(void)
 573 {
 574         TDAPVetoHookFunctionHook *cur, *p;
 575
 576         cur = TDAPVetoHookTable;
 577         while (cur != NULL)
 578         {
 579                 MODM_syslog(LOG_DEBUG, "Destroyed TDAP Veto function\n");
 580                 p = cur->next;
 581                 free(cur);
 582                 cur = p;
 583         }
 584         TDAPVetoHookTable = NULL;
 585 }
 586
 587
 588 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType, int Priority)
 589 {
 590         SessionFunctionHook *newfcn;
 591
 592         newfcn = (SessionFunctionHook *)
 593             malloc(sizeof(SessionFunctionHook));
 594         newfcn->Priority = Priority;
 595         newfcn->h_function_pointer = fcn_ptr;
 596         newfcn->eventtype = EventType;
 597
 598         SessionFunctionHook **pfcn;
 599         pfcn = &SessionHookTable;
 600         while ((*pfcn != NULL) &&
 601                ((*pfcn)->Priority < newfcn->Priority) &&
 602                ((*pfcn)->next != NULL))
 603                 pfcn = &(*pfcn)->next;
 604
 605         newfcn->next = *pfcn;
 606         *pfcn = newfcn;
 607
 608         MOD_syslog(LOG_DEBUG, "Registered a new session function (type %d Priority %d)\n",
 609                    EventType, Priority);
 610 }
 611
 612
 613 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 614 {
 615         SessionFunctionHook *cur, *p, *last;
 616         last = NULL;
 617         cur = SessionHookTable;
 618         while  (cur != NULL) {
 619                 if ((fcn_ptr == cur->h_function_pointer) &&
 620                     (EventType == cur->eventtype))
 621                 {
 622                         MOD_syslog(LOG_DEBUG, "Unregistered session function (type %d)\n",
 623                                    EventType);
 624                         p = cur->next;
 625
 626                         free(cur);
 627                         cur = NULL;
 628
 629                         if (last != NULL)
 630                                 last->next = p;
 631                         else
 632                                 SessionHookTable = p;
 633                         cur = p;
 634                 }
 635                 else {
 636                         last = cur;
 637                         cur = cur->next;
 638                 }
 639         }
 640 }
 641
 642 void CtdlDestroySessionHooks(void)
 643 {
 644         SessionFunctionHook *cur, *p;
 645
 646         cur = SessionHookTable;
 647         while (cur != NULL)
 648         {
 649                 MODM_syslog(LOG_DEBUG, "Destroyed session function\n");
 650                 p = cur->next;
 651                 free(cur);
 652                 cur = p;
 653         }
 654         SessionHookTable = NULL;
 655 }
 656
 657
 658 void CtdlRegisterUserHook(void (*fcn_ptr) (ctdluser *), int EventType)
 659 {
 660
 661         UserFunctionHook *newfcn;
 662
 663         newfcn = (UserFunctionHook *)
 664             malloc(sizeof(UserFunctionHook));
 665         newfcn->next = UserHookTable;
 666         newfcn->h_function_pointer = fcn_ptr;
 667         newfcn->eventtype = EventType;
 668         UserHookTable = newfcn;
 669
 670         MOD_syslog(LOG_DEBUG, "Registered a new user function (type %d)\n",
 671                    EventType);
 672 }
 673
 674
 675 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 676 {
 677         UserFunctionHook *cur, *p, *last;
 678         last = NULL;
 679         cur = UserHookTable;
 680         while (cur != NULL) {
 681                 if ((fcn_ptr == cur->h_function_pointer) &&
 682                     (EventType == cur->eventtype))
 683                 {
 684                         MOD_syslog(LOG_DEBUG, "Unregistered user function (type %d)\n",
 685                                    EventType);
 686                         p = cur->next;
 687
 688                         free(cur);
 689                         cur = NULL;
 690
 691                         if (last != NULL)
 692                                 last->next = p;
 693                         else
 694                                 UserHookTable = p;
 695                         cur = p;
 696                 }
 697                 else {
 698                         last = cur;
 699                         cur = cur->next;
 700                 }
 701         }
 702 }
 703
 704 void CtdlDestroyUserHooks(void)
 705 {
 706         UserFunctionHook *cur, *p;
 707
 708         cur = UserHookTable;
 709         while (cur != NULL)
 710         {
 711                 MODM_syslog(LOG_DEBUG, "Destroyed user function \n");
 712                 p = cur->next;
 713                 free(cur);
 714                 cur = p;
 715         }
 716         UserHookTable = NULL;
 717 }
 718
 719
 720 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *, recptypes *),
 721                                 int EventType)
 722 {
 723
 724         MessageFunctionHook *newfcn;
 725
 726         newfcn = (MessageFunctionHook *)
 727             malloc(sizeof(MessageFunctionHook));
 728         newfcn->next = MessageHookTable;
 729         newfcn->h_function_pointer = handler;
 730         newfcn->eventtype = EventType;
 731         MessageHookTable = newfcn;
 732
 733         MOD_syslog(LOG_DEBUG, "Registered a new message function (type %d)\n",
 734                    EventType);
 735 }
 736
 737
 738 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *, recptypes *),
 739                 int EventType)
 740 {
 741         MessageFunctionHook *cur, *p, *last;
 742         last = NULL;
 743         cur = MessageHookTable;
 744         while (cur != NULL) {
 745                 if ((handler == cur->h_function_pointer) &&
 746                     (EventType == cur->eventtype))
 747                 {
 748                         MOD_syslog(LOG_DEBUG, "Unregistered message function (type %d)\n",
 749                                    EventType);
 750                         p = cur->next;
 751                         free(cur);
 752                         cur = NULL;
 753
 754                         if (last != NULL)
 755                                 last->next = p;
 756                         else
 757                                 MessageHookTable = p;
 758                         cur = p;
 759                 }
 760                 else {
 761                         last = cur;
 762                         cur = cur->next;
 763                 }
 764         }
 765 }
 766
 767 void CtdlDestroyMessageHook(void)
 768 {
 769         MessageFunctionHook *cur, *p;
 770
 771         cur = MessageHookTable;
 772         while (cur != NULL)
 773         {
 774                 MOD_syslog(LOG_DEBUG, "Destroyed message function (type %d)\n", cur->eventtype);
 775                 p = cur->next;
 776                 free(cur);
 777                 cur = p;
 778         }
 779         MessageHookTable = NULL;
 780 }
 781
 782
 783 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 784 {
 785         RoomFunctionHook *newfcn;
 786
 787         newfcn = (RoomFunctionHook *)
 788             malloc(sizeof(RoomFunctionHook));
 789         newfcn->next = RoomHookTable;
 790         newfcn->fcn_ptr = fcn_ptr;
 791         RoomHookTable = newfcn;
 792
 793         MODM_syslog(LOG_DEBUG, "Registered a new room function\n");
 794 }
 795
 796
 797 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 798 {
 799         RoomFunctionHook *cur, *p, *last;
 800         last = NULL;
 801         cur = RoomHookTable;
 802         while (cur != NULL)
 803         {
 804                 if (fcn_ptr == cur->fcn_ptr) {
 805                         MODM_syslog(LOG_DEBUG, "Unregistered room function\n");
 806                         p = cur->next;
 807
 808                         free(cur);
 809                         cur = NULL;
 810
 811                         if (last != NULL)
 812                                 last->next = p;
 813                         else
 814                                 RoomHookTable = p;
 815                         cur = p;
 816                 }
 817                 else {
 818                         last = cur;
 819                         cur = cur->next;
 820                 }
 821         }
 822 }
 823
 824
 825 void CtdlDestroyRoomHooks(void)
 826 {
 827         RoomFunctionHook *cur, *p;
 828
 829         cur = RoomHookTable;
 830         while (cur != NULL)
 831         {
 832                 MODM_syslog(LOG_DEBUG, "Destroyed room function\n");
 833                 p = cur->next;
 834                 free(cur);
 835                 cur = p;
 836         }
 837         RoomHookTable = NULL;
 838 }
 839
 840 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 841 {
 842         NetprocFunctionHook *newfcn;
 843
 844         newfcn = (NetprocFunctionHook *)
 845             malloc(sizeof(NetprocFunctionHook));
 846         newfcn->next = NetprocHookTable;
 847         newfcn->h_function_pointer = handler;
 848         NetprocHookTable = newfcn;
 849
 850         MODM_syslog(LOG_DEBUG, "Registered a new netproc function\n");
 851 }
 852
 853
 854 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 855 {
 856         NetprocFunctionHook *cur, *p, *last;
 857
 858         cur = NetprocHookTable;
 859         last = NULL;
 860
 861         while (cur != NULL) {
 862                 if (handler == cur->h_function_pointer)
 863                 {
 864                         MODM_syslog(LOG_DEBUG, "Unregistered netproc function\n");
 865                         p = cur->next;
 866                         free(cur);
 867                         if (last != NULL) {
 868                                 last->next = p;
 869                         }
 870                         else {
 871                                 NetprocHookTable = p;
 872                         }
 873                         cur = p;
 874                 }
 875                 else {
 876                         last = cur;
 877                         cur = cur->next;
 878                 }
 879         }
 880 }
 881
 882 void CtdlDestroyNetprocHooks(void)
 883 {
 884         NetprocFunctionHook *cur, *p;
 885
 886         cur = NetprocHookTable;
 887         while (cur != NULL)
 888         {
 889                 MODM_syslog(LOG_DEBUG, "Destroyed netproc function\n");
 890                 p = cur->next;
 891                 free(cur);
 892                 cur = p;
 893         }
 894         NetprocHookTable = NULL;
 895 }
 896
 897
 898 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 899 {
 900         DeleteFunctionHook *newfcn;
 901
 902         newfcn = (DeleteFunctionHook *)
 903             malloc(sizeof(DeleteFunctionHook));
 904         newfcn->next = DeleteHookTable;
 905         newfcn->h_function_pointer = handler;
 906         DeleteHookTable = newfcn;
 907
 908         MODM_syslog(LOG_DEBUG, "Registered a new delete function\n");
 909 }
 910
 911
 912 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 913 {
 914         DeleteFunctionHook *cur, *p, *last;
 915
 916         last = NULL;
 917         cur = DeleteHookTable;
 918         while (cur != NULL) {
 919                 if (handler == cur->h_function_pointer )
 920                 {
 921                         MODM_syslog(LOG_DEBUG, "Unregistered delete function\n");
 922                         p = cur->next;
 923                         free(cur);
 924
 925                         if (last != NULL)
 926                                 last->next = p;
 927                         else
 928                                 DeleteHookTable = p;
 929
 930                         cur = p;
 931                 }
 932                 else {
 933                         last = cur;
 934                         cur = cur->next;
 935                 }
 936         }
 937 }
 938 void CtdlDestroyDeleteHooks(void)
 939 {
 940         DeleteFunctionHook *cur, *p;
 941
 942         cur = DeleteHookTable;
 943         while (cur != NULL)
 944         {
 945                 MODM_syslog(LOG_DEBUG, "Destroyed delete function\n");
 946                 p = cur->next;
 947                 free(cur);
 948                 cur = p;
 949         }
 950         DeleteHookTable = NULL;
 951 }
 952
 953
 954
 955
 956 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
 957 {
 958         FixedOutputHook *newfcn;
 959
 960         newfcn = (FixedOutputHook *)
 961             malloc(sizeof(FixedOutputHook));
 962         newfcn->next = FixedOutputTable;
 963         newfcn->h_function_pointer = handler;
 964         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
 965         FixedOutputTable = newfcn;
 966
 967         MOD_syslog(LOG_DEBUG, "Registered a new fixed output function for %s\n", newfcn->content_type);
 968 }
 969
 970
 971 void CtdlUnregisterFixedOutputHook(char *content_type)
 972 {
 973         FixedOutputHook *cur, *p, *last;
 974
 975         last = NULL;
 976         cur = FixedOutputTable;
 977         while (cur != NULL) {
 978                 /* This will also remove duplicates if any */
 979                 if (!strcasecmp(content_type, cur->content_type)) {
 980                         MOD_syslog(LOG_DEBUG,
 981                                    "Unregistered fixed output function for %s\n",
 982                                    content_type);
 983
 984                         p = cur->next;
 985                         free(cur);
 986
 987                         if (last != NULL)
 988                                 last->next = p;
 989                         else
 990                                 FixedOutputTable = p;
 991
 992                         cur = p;
 993                 }
 994                 else
 995                 {
 996                         last = cur;
 997                         cur = cur->next;
 998                 }
 999         }
1000 }
1001
1002 void CtdlDestroyFixedOutputHooks(void)
1003 {
1004         FixedOutputHook *cur, *p;
1005
1006         cur = FixedOutputTable;
1007         while (cur != NULL)
1008         {
1009                 MOD_syslog(LOG_DEBUG, "Destroyed fixed output function for %s\n", cur->content_type);
1010                 p = cur->next;
1011                 free(cur);
1012                 cur = p;
1013
1014         }
1015         FixedOutputTable = NULL;
1016 }
1017
1018 /* returns nonzero if we found a hook and used it */
1019 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
1020 {
1021         FixedOutputHook *fcn;
1022
1023         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
1024                 if (!strcasecmp(content_type, fcn->content_type)) {
1025                         (*fcn->h_function_pointer) (content, content_length);
1026                         return(1);
1027                 }
1028         }
1029         return(0);
1030 }
1031
1032
1033
1034
1035
1036 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1037 {
1038
1039         XmsgFunctionHook *newfcn;
1040
1041         newfcn = (XmsgFunctionHook *) malloc(sizeof(XmsgFunctionHook));
1042         newfcn->next = XmsgHookTable;
1043         newfcn->order = order;
1044         newfcn->h_function_pointer = fcn_ptr;
1045         XmsgHookTable = newfcn;
1046         MOD_syslog(LOG_DEBUG, "Registered a new x-msg function (priority %d)\n", order);
1047 }
1048
1049
1050 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1051 {
1052         XmsgFunctionHook *cur, *p, *last;
1053
1054         last = NULL;
1055         cur = XmsgHookTable;
1056         while (cur != NULL) {
1057                 /* This will also remove duplicates if any */
1058                 if (fcn_ptr == cur->h_function_pointer &&
1059                     order == cur->order) {
1060                         MOD_syslog(LOG_DEBUG, "Unregistered x-msg function "
1061                                    "(priority %d)\n", order);
1062                         p = cur->next;
1063                         free(cur);
1064
1065                         if (last != NULL)
1066                                 last->next = p;
1067                         else
1068                                 XmsgHookTable = p;
1069
1070                         cur = p;
1071                 }
1072                 else {
1073                         last = cur;
1074                         cur = cur->next;
1075                 }
1076         }
1077 }
1078
1079 void CtdlDestroyXmsgHooks(void)
1080 {
1081         XmsgFunctionHook *cur, *p;
1082
1083         cur = XmsgHookTable;
1084         while (cur != NULL)
1085         {
1086                 MOD_syslog(LOG_DEBUG, "Destroyed x-msg function "
1087                         "(priority %d)\n", cur->order);
1088                 p = cur->next;
1089
1090                 free(cur);
1091                 cur = p;
1092         }
1093         XmsgHookTable = NULL;
1094 }
1095
1096
1097 void CtdlRegisterServiceHook(int tcp_port,
1098                              char *sockpath,
1099                              void (*h_greeting_function) (void),
1100                              void (*h_command_function) (void),
1101                              void (*h_async_function) (void),
1102                              const char *ServiceName)
1103 {
1104         ServiceFunctionHook *newfcn;
1105         char *message;
1106         char error[SIZ];
1107
1108         strcpy(error, "");
1109         newfcn = (ServiceFunctionHook *) malloc(sizeof(ServiceFunctionHook));
1110         message = (char*) malloc (SIZ + SIZ);
1111
1112         newfcn->next = ServiceHookTable;
1113         newfcn->tcp_port = tcp_port;
1114         newfcn->sockpath = sockpath;
1115         newfcn->h_greeting_function = h_greeting_function;
1116         newfcn->h_command_function = h_command_function;
1117         newfcn->h_async_function = h_async_function;
1118         newfcn->ServiceName = ServiceName;
1119
1120         if (sockpath != NULL) {
1121                 newfcn->msock = ctdl_uds_server(sockpath, CtdlGetConfigInt("c_maxsessions"), error);
1122                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
1123         }
1124         else if (tcp_port <= 0) {       /* port -1 to disable */
1125                 MOD_syslog(LOG_INFO, "Service %s has been manually disabled, skipping\n", ServiceName);
1126                 free (message);
1127                 free(newfcn);
1128                 return;
1129         }
1130         else {
1131                 newfcn->msock = ctdl_tcp_server(CtdlGetConfigStr("c_ip_addr"),
1132                                               tcp_port,
1133                                               CtdlGetConfigInt("c_maxsessions"),
1134                                               error);
1135                 snprintf(message, SIZ, "TCP port %s:%d: (%s) ",
1136                          CtdlGetConfigStr("c_ip_addr"), tcp_port, ServiceName);
1137         }
1138
1139         if (newfcn->msock > 0) {
1140                 ServiceHookTable = newfcn;
1141                 strcat(message, "registered.");
1142                 MOD_syslog(LOG_INFO, "%s\n", message);
1143         }
1144         else {
1145                 AddPortError(message, error);
1146                 strcat(message, "FAILED.");
1147                 MOD_syslog(LOG_CRIT, "%s\n", message);
1148                 free(newfcn);
1149         }
1150         free(message);
1151 }
1152
1153
1154 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
1155                         void (*h_greeting_function) (void),
1156                         void (*h_command_function) (void),
1157                         void (*h_async_function) (void)
1158                         )
1159 {
1160         ServiceFunctionHook *cur, *p, *last;
1161
1162         last = NULL;
1163         cur = ServiceHookTable;
1164         while (cur != NULL) {
1165                 /* This will also remove duplicates if any */
1166                 if (h_greeting_function == cur->h_greeting_function &&
1167                     h_command_function == cur->h_command_function &&
1168                     h_async_function == cur->h_async_function &&
1169                     tcp_port == cur->tcp_port &&
1170                     !(sockpath && cur->sockpath && strcmp(sockpath, cur->sockpath)) )
1171                 {
1172                         if (cur->msock > 0)
1173                                 close(cur->msock);
1174                         if (sockpath) {
1175                                 MOD_syslog(LOG_INFO, "Closed UNIX domain socket %s\n",
1176                                            sockpath);
1177                                 unlink(sockpath);
1178                         } else if (tcp_port) {
1179                                 MOD_syslog(LOG_INFO, "Closed TCP port %d\n", tcp_port);
1180                         } else {
1181                                 MOD_syslog(LOG_INFO, "Unregistered service \"%s\"\n", cur->ServiceName);
1182                         }
1183                         p = cur->next;
1184                         free(cur);
1185                         if (last != NULL)
1186                                 last->next = p;
1187                         else
1188                                 ServiceHookTable = p;
1189                         cur = p;
1190                 }
1191                 else {
1192                         last = cur;
1193                         cur = cur->next;
1194                 }
1195         }
1196 }
1197
1198
1199 void CtdlShutdownServiceHooks(void)
1200 {
1201         /* sort of a duplicate of close_masters() but called earlier */
1202         ServiceFunctionHook *cur;
1203
1204         cur = ServiceHookTable;
1205         while (cur != NULL)
1206         {
1207                 if (cur->msock != -1)
1208                 {
1209                         close(cur->msock);
1210                         cur->msock = -1;
1211                         if (cur->sockpath != NULL){
1212                                 MOD_syslog(LOG_INFO, "[%s] Closed UNIX domain socket %s\n",
1213                                            cur->ServiceName,
1214                                            cur->sockpath);
1215                                 unlink(cur->sockpath);
1216                         } else {
1217                                 MOD_syslog(LOG_INFO, "[%s] closing service\n",
1218                                            cur->ServiceName);
1219                         }
1220                 }
1221                 cur = cur->next;
1222         }
1223 }
1224
1225 void CtdlDestroyServiceHook(void)
1226 {
1227         const char *Text;
1228         ServiceFunctionHook *cur, *p;
1229
1230         cur = ServiceHookTable;
1231         while (cur != NULL)
1232         {
1233                 if (cur->msock != -1)
1234                 {
1235                         close(cur->msock);
1236                         Text = "Closed";
1237                 }
1238                 else
1239                 {
1240                         Text = " Not closing again";
1241                 }
1242
1243                 if (cur->sockpath) {
1244                         MOD_syslog(LOG_INFO, "%s UNIX domain socket %s\n",
1245                                    Text,
1246                                    cur->sockpath);
1247                         unlink(cur->sockpath);
1248                 } else if (cur->tcp_port) {
1249                         MOD_syslog(LOG_INFO, "%s TCP port %d\n", Text, cur->tcp_port);
1250                 } else {
1251                         MOD_syslog(LOG_INFO, "Destroyed service \"%s\"\n", cur->ServiceName);
1252                 }
1253                 p = cur->next;
1254                 free(cur);
1255                 cur = p;
1256         }
1257         ServiceHookTable = NULL;
1258 }
1259
1260 void CtdlRegisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1261 {
1262         SearchFunctionHook *newfcn;
1263
1264         if (!name || !fcn_ptr) {
1265                 return;
1266         }
1267
1268         newfcn = (SearchFunctionHook *)
1269             malloc(sizeof(SearchFunctionHook));
1270         newfcn->next = SearchFunctionHookTable;
1271         newfcn->name = name;
1272         newfcn->fcn_ptr = fcn_ptr;
1273         SearchFunctionHookTable = newfcn;
1274
1275         MOD_syslog(LOG_DEBUG, "Registered a new search function (%s)\n", name);
1276 }
1277
1278 void CtdlUnregisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1279 {
1280         SearchFunctionHook *cur, *p, *last;
1281
1282         last = NULL;
1283         cur = SearchFunctionHookTable;
1284         while (cur != NULL) {
1285                 if (fcn_ptr &&
1286                     (cur->fcn_ptr == fcn_ptr) &&
1287                     name && !strcmp(name, cur->name))
1288                 {
1289                         MOD_syslog(LOG_DEBUG, "Unregistered search function(%s)\n", name);
1290                         p = cur->next;
1291                         free (cur);
1292                         if (last != NULL)
1293                                 last->next = p;
1294                         else
1295                                 SearchFunctionHookTable = p;
1296                         cur = p;
1297                 }
1298                 else {
1299                         last = cur;
1300                         cur = cur->next;
1301                 }
1302         }
1303 }
1304
1305 void CtdlDestroySearchHooks(void)
1306 {
1307         SearchFunctionHook *cur, *p;
1308
1309         cur = SearchFunctionHookTable;
1310         SearchFunctionHookTable = NULL;
1311         while (cur != NULL) {
1312                 p = cur->next;
1313                 free(cur);
1314                 cur = p;
1315         }
1316 }
1317
1318 void CtdlModuleDoSearch(int *num_msgs, long **search_msgs, const char *search_string, const char *func_name)
1319 {
1320         SearchFunctionHook *fcn = NULL;
1321
1322         for (fcn = SearchFunctionHookTable; fcn != NULL; fcn = fcn->next) {
1323                 if (!func_name || !strcmp(func_name, fcn->name)) {
1324                         (*fcn->fcn_ptr) (num_msgs, search_msgs, search_string);
1325                         return;
1326                 }
1327         }
1328         *num_msgs = 0;
1329 }
1330
1331 int CheckTDAPVeto (int DBType, StrBuf *ErrMsg)
1332 {
1333         int Result = 0;
1334         TDAPVetoHookFunctionHook *fcn = NULL;
1335
1336         for (fcn = TDAPVetoHookTable; (fcn != NULL) && (Result == 0); fcn = fcn->next) {
1337                 if (fcn->eventtype == DBType) {
1338                         Result = (*fcn->h_function_pointer) (ErrMsg);
1339                 }
1340         }
1341         return Result;
1342 }
1343
1344 void PerformSessionHooks(int EventType)
1345 {
1346         SessionFunctionHook *fcn = NULL;
1347
1348         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
1349                 if (fcn->eventtype == EventType) {
1350                         if (EventType == EVT_TIMER) {
1351                                 pthread_setspecific(MyConKey, NULL);    /* for every hook */
1352                         }
1353                         (*fcn->h_function_pointer) ();
1354                 }
1355         }
1356 }
1357
1358 void PerformUserHooks(ctdluser *usbuf, int EventType)
1359 {
1360         UserFunctionHook *fcn = NULL;
1361
1362         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
1363                 if (fcn->eventtype == EventType) {
1364                         (*fcn->h_function_pointer) (usbuf);
1365                 }
1366         }
1367 }
1368
1369 int PerformMessageHooks(struct CtdlMessage *msg, recptypes *recps, int EventType)
1370 {
1371         MessageFunctionHook *fcn = NULL;
1372         int total_retval = 0;
1373
1374         /* Other code may elect to protect this message from server-side
1375          * handlers; if this is the case, don't do anything.
1376         MOD_syslog(LOG_DEBUG, "** Event type is %d, flags are %d\n", EventType, msg->cm_flags);
1377          */
1378         if (msg->cm_flags & CM_SKIP_HOOKS) {
1379                 MODM_syslog(LOG_DEBUG, "Skipping hooks\n");
1380                 return(0);
1381         }
1382
1383         /* Otherwise, run all the hooks appropriate to this event type.
1384          */
1385         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
1386                 if (fcn->eventtype == EventType) {
1387                         total_retval = total_retval + (*fcn->h_function_pointer) (msg, recps);
1388                 }
1389         }
1390
1391         /* Return the sum of the return codes from the hook functions.  If
1392          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
1393          * the save operation to abort.
1394          */
1395         return total_retval;
1396 }
1397
1398
1399 int PerformRoomHooks(struct ctdlroom *target_room)
1400 {
1401         RoomFunctionHook *fcn;
1402         int total_retval = 0;
1403
1404         MOD_syslog(LOG_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
1405
1406         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
1407                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
1408         }
1409
1410         /* Return the sum of the return codes from the hook functions.
1411          */
1412         return total_retval;
1413 }
1414
1415
1416 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
1417 {
1418         NetprocFunctionHook *fcn;
1419         int total_retval = 0;
1420
1421         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
1422                 total_retval = total_retval +
1423                         (*fcn->h_function_pointer) (msg, target_room);
1424         }
1425
1426         /* Return the sum of the return codes from the hook functions.
1427          * A nonzero return code will cause the message to *not* be imported.
1428          */
1429         return total_retval;
1430 }
1431
1432
1433 void PerformDeleteHooks(char *room, long msgnum)
1434 {
1435         DeleteFunctionHook *fcn;
1436
1437         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
1438                 (*fcn->h_function_pointer) (room, msgnum);
1439         }
1440 }
1441
1442
1443
1444
1445
1446 int PerformXmsgHooks(char *sender, char *sender_email, char *recp, char *msg)
1447 {
1448         XmsgFunctionHook *fcn;
1449         int total_sent = 0;
1450         int p;
1451
1452         for (p=0; p<MAX_XMSG_PRI; ++p) {
1453                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1454                         if (fcn->order == p) {
1455                                 total_sent +=
1456                                         (*fcn->h_function_pointer)
1457                                                 (sender, sender_email, recp, msg);
1458                         }
1459                 }
1460                 /* Break out of the loop if a higher-priority function
1461                  * successfully delivered the message.  This prevents duplicate
1462                  * deliveries to local users simultaneously signed onto
1463                  * remote services.
1464                  */
1465                 if (total_sent) break;
1466         }
1467         return total_sent;
1468 }
1469
1470
1471 /*
1472  * Dirty hack until we impliment a hook mechanism for this
1473  */
1474 void CtdlModuleStartCryptoMsgs(char *ok_response, char *nosup_response, char *error_response)
1475 {
1476 #ifdef HAVE_OPENSSL
1477         CtdlStartTLS (ok_response, nosup_response, error_response);
1478 #endif
1479 }
1480
1481 void DebugModulesEnable(const int n)
1482 {
1483         DebugModules = n;
1484 }
1485 void MarkersEnable(const int n)
1486 {
1487         EnableMarkers = n;
1488 }
1489 void DebugCitadelProtoEnable(const int n)
1490 {
1491         EnableCtlProto = n;
1492 }
1493
1494 CTDL_MODULE_INIT(modules)
1495 {
1496         if (!threading) {
1497                 CtdlRegisterDebugFlagHook(HKEY("modules"), DebugModulesEnable, &DebugModules);
1498                 CtdlRegisterDebugFlagHook(HKEY("periodicmarkers"), MarkersEnable, &EnableMarkers);
1499                 CtdlRegisterDebugFlagHook(HKEY("citadelprotocol"), DebugCitadelProtoEnable, &EnableCtlProto);
1500         }
1501         return "modules";
1502 }