citadel/serv_extensions.c

   1 /*
   2  * Citadel Dynamic Loading Module
   3  * Written by Brian Costello <btx@calyx.net>
   4  *
   5  * Copyright (c) 1987-2011 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 "sysdep.h"
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <sys/types.h>
  21 #include <dirent.h>
  22 #include <string.h>
  23 #include <limits.h>
  24 #include <ctype.h>
  25 #include <syslog.h>
  26 #include <libcitadel.h>
  27 #include "citadel.h"
  28 #include "server.h"
  29 #include "serv_extensions.h"
  30 #include "sysdep_decls.h"
  31 #include "msgbase.h"
  32 #include "config.h"
  33
  34 #include "modules/crypto/serv_crypto.h" /* Needed until a universal crypto startup hook is implimented for CtdlStartTLS */
  35
  36 #include "ctdl_module.h"
  37
  38
  39 int DebugModules = 0;
  40
  41 /*
  42  * Structure defentitions for hook tables
  43  */
  44
  45 HashList *LogDebugEntryTable = NULL;
  46
  47 typedef struct LogFunctionHook LogFunctionHook;
  48 struct LogFunctionHook {
  49         LogFunctionHook *next;
  50         int loglevel;
  51         void (*h_function_pointer) (char *);
  52 };
  53
  54 LogFunctionHook *LogHookTable = NULL;
  55
  56 typedef struct FixedOutputHook FixedOutputHook;
  57 struct FixedOutputHook {
  58         FixedOutputHook *next;
  59         char content_type[64];
  60         void (*h_function_pointer) (char *, int);
  61 };
  62 FixedOutputHook *FixedOutputTable = NULL;
  63
  64
  65
  66 /*
  67  * TDAPVetoHookFunctionHook extensions are used for any type of hook for which
  68  * may prevent the autopurger to run for this specific data class.
  69  * the function should at least LOG_INFO that it does so.
  70  */
  71 typedef struct TDAPVetoHookFunctionHook TDAPVetoHookFunctionHook;
  72 struct TDAPVetoHookFunctionHook {
  73         TDAPVetoHookFunctionHook *next;
  74         int Priority;
  75         int (*h_function_pointer) (StrBuf *);
  76         int eventtype;
  77 };
  78 TDAPVetoHookFunctionHook *TDAPVetoHookTable = NULL;
  79
  80
  81
  82 /*
  83  * SessionFunctionHook extensions are used for any type of hook for which
  84  * the context in which it's being called (which is determined by the event
  85  * type) will make it obvious for the hook function to know where to look for
  86  * pertinent data.
  87  */
  88 typedef struct SessionFunctionHook SessionFunctionHook;
  89 struct SessionFunctionHook {
  90         SessionFunctionHook *next;
  91         int Priority;
  92         void (*h_function_pointer) (void);
  93         int eventtype;
  94 };
  95 SessionFunctionHook *SessionHookTable = NULL;
  96
  97 /*
  98  * UserFunctionHook extensions are used for any type of hook which implements
  99  * an operation on a user or username (potentially) other than the one
 100  * operating the current session.
 101  */
 102 typedef struct UserFunctionHook UserFunctionHook;
 103 struct UserFunctionHook {
 104         UserFunctionHook *next;
 105         void (*h_function_pointer) (struct ctdluser *usbuf);
 106         int eventtype;
 107 };
 108 UserFunctionHook *UserHookTable = NULL;
 109
 110 /*
 111  * MessageFunctionHook extensions are used for hooks which implement handlers
 112  * for various types of message operations (save, read, etc.)
 113  */
 114 typedef struct MessageFunctionHook MessageFunctionHook;
 115 struct MessageFunctionHook {
 116         MessageFunctionHook *next;
 117         int (*h_function_pointer) (struct CtdlMessage *msg);
 118         int eventtype;
 119 };
 120 MessageFunctionHook *MessageHookTable = NULL;
 121
 122
 123 /*
 124  * NetprocFunctionHook extensions are used for hooks which implement handlers
 125  * for incoming network messages.
 126  */
 127 typedef struct NetprocFunctionHook NetprocFunctionHook;
 128 struct NetprocFunctionHook {
 129         NetprocFunctionHook *next;
 130         int (*h_function_pointer) (struct CtdlMessage *msg, char *target_room);
 131 };
 132 NetprocFunctionHook *NetprocHookTable = NULL;
 133
 134
 135 /*
 136  * DeleteFunctionHook extensions are used for hooks which get called when a
 137  * message is about to be deleted.
 138  */
 139 typedef struct DeleteFunctionHook DeleteFunctionHook;
 140 struct DeleteFunctionHook {
 141         DeleteFunctionHook *next;
 142         void (*h_function_pointer) (char *target_room, long msgnum);
 143 };
 144 DeleteFunctionHook *DeleteHookTable = NULL;
 145
 146
 147 /*
 148  * ExpressMessageFunctionHook extensions are used for hooks which implement
 149  * the sending of an instant message through various channels.  Any function
 150  * registered should return the number of recipients to whom the message was
 151  * successfully transmitted.
 152  */
 153 typedef struct XmsgFunctionHook XmsgFunctionHook;
 154 struct XmsgFunctionHook {
 155         XmsgFunctionHook *next;
 156         int (*h_function_pointer) (char *, char *, char *, char *);
 157         int order;
 158 };
 159 XmsgFunctionHook *XmsgHookTable = NULL;
 160
 161
 162
 163
 164 /*
 165  * RoomFunctionHook extensions are used for hooks which impliment room
 166  * processing functions when new messages are added EG. SIEVE.
 167  */
 168 typedef struct RoomFunctionHook RoomFunctionHook;
 169 struct RoomFunctionHook {
 170         RoomFunctionHook *next;
 171         int (*fcn_ptr) (struct ctdlroom *);
 172 };
 173 RoomFunctionHook *RoomHookTable = NULL;
 174
 175
 176
 177 typedef struct SearchFunctionHook SearchFunctionHook;
 178 struct SearchFunctionHook {
 179         SearchFunctionHook *next;
 180         void (*fcn_ptr) (int *, long **, const char *);
 181         char *name;
 182 };
 183 SearchFunctionHook *SearchFunctionHookTable = NULL;
 184
 185 CleanupFunctionHook *CleanupHookTable = NULL;
 186 CleanupFunctionHook *EVCleanupHookTable = NULL;
 187
 188 ServiceFunctionHook *ServiceHookTable = NULL;
 189
 190 typedef struct ProtoFunctionHook ProtoFunctionHook;
 191 struct ProtoFunctionHook {
 192         void (*handler) (char *cmdbuf);
 193         const char *cmd;
 194         const char *desc;
 195 };
 196
 197 HashList *ProtoHookList = NULL;
 198
 199
 200 #define ERR_PORT (1 << 1)
 201
 202
 203 static StrBuf *portlist = NULL;
 204
 205 static StrBuf *errormessages = NULL;
 206
 207
 208 long   DetailErrorFlags;
 209 ConstStr Empty = {HKEY("")};
 210 char *ErrSubject = "Startup Problems";
 211 ConstStr ErrGeneral[] = {
 212         {HKEY("Citadel had trouble on starting up. ")},
 213         {HKEY(" This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
 214               "If you don't want citadel to provide these services, turn them off in WebCit via: ")},
 215         {HKEY("To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
 216               "The errors returned by the system were:\n")},
 217         {HKEY("You can recheck the above if you follow this faq item:\n"
 218               "http://www.citadel.org/doku.php?id=faq:mastering_your_os:net#netstat")}
 219 };
 220
 221 ConstStr ErrPortShort = { HKEY("We couldn't bind all ports you configured to be provided by citadel server.\n")};
 222 ConstStr ErrPortWhere = { HKEY("\"Admin->System Preferences->Network\".\n\nThe failed ports and sockets are: ")};
 223 ConstStr ErrPortHint  = { HKEY("If you want citadel to provide you with that functionality, "
 224                                "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
 225                                " and stop the program that binds these ports.\n You should eventually remove "
 226                                " their initscripts in /etc/init.d so that you won't get this trouble once more.\n"
 227                                " After that goto \"Administration -> Shutdown Citadel\" to make Citadel restart & retry to bind this port.\n")};
 228
 229
 230 void LogPrintMessages(long err)
 231 {
 232         StrBuf *Message;
 233         StrBuf *List, *DetailList;
 234         ConstStr *Short, *Where, *Hint;
 235
 236
 237         Message = NewStrBufPlain(NULL,
 238                                  StrLength(portlist) + StrLength(errormessages));
 239
 240         DetailErrorFlags = DetailErrorFlags & ~err;
 241
 242         switch (err)
 243         {
 244         case ERR_PORT:
 245                 Short = &ErrPortShort;
 246                 Where = &ErrPortWhere;
 247                 Hint  = &ErrPortHint;
 248                 List  = portlist;
 249                 DetailList = errormessages;
 250                 break;
 251         default:
 252                 Short = &Empty;
 253                 Where = &Empty;
 254                 Hint  = &Empty;
 255                 List  = NULL;
 256                 DetailList = NULL;
 257         }
 258
 259         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[0]), 0);
 260         StrBufAppendBufPlain(Message, CKEY(*Short), 0);
 261         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[1]), 0);
 262         StrBufAppendBufPlain(Message, CKEY(*Where), 0);
 263         StrBufAppendBuf(Message, List, 0);
 264         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 265         StrBufAppendBufPlain(Message, CKEY(*Hint), 0);
 266         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 267         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[2]), 0);
 268         StrBufAppendBuf(Message, DetailList, 0);
 269         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 270         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[3]), 0);
 271
 272         MOD_syslog(LOG_EMERG, "%s", ChrPtr(Message));
 273         MOD_syslog(LOG_EMERG, "%s", ErrSubject);
 274         quickie_message("Citadel", NULL, NULL, AIDEROOM, ChrPtr(Message), FMT_FIXED, ErrSubject);
 275
 276         FreeStrBuf(&Message);
 277         FreeStrBuf(&List);
 278         FreeStrBuf(&DetailList);
 279 }
 280
 281
 282 void AddPortError(char *Port, char *ErrorMessage)
 283 {
 284         long len;
 285
 286         DetailErrorFlags |= ERR_PORT;
 287
 288         len = StrLength(errormessages);
 289         if (len > 0) StrBufAppendBufPlain(errormessages, HKEY("; "), 0);
 290         else errormessages = NewStrBuf();
 291         StrBufAppendBufPlain(errormessages, ErrorMessage, -1, 0);
 292
 293
 294         len = StrLength(portlist);
 295         if (len > 0) StrBufAppendBufPlain(portlist, HKEY(";"), 0);
 296         else portlist = NewStrBuf();
 297         StrBufAppendBufPlain(portlist, Port, -1, 0);
 298 }
 299
 300
 301 int DLoader_Exec_Cmd(char *cmdbuf)
 302 {
 303         void *vP;
 304         ProtoFunctionHook *p;
 305
 306         if (GetHash(ProtoHookList, cmdbuf, 4, &vP) && (vP != NULL)) {
 307                 p = (ProtoFunctionHook*) vP;
 308                 p->handler(&cmdbuf[5]);
 309                 return 1;
 310         }
 311         return 0;
 312 }
 313
 314 long FourHash(const char *key, long length)
 315 {
 316         int i;
 317         int ret = 0;
 318         const unsigned char *ptr = (const unsigned char*)key;
 319
 320         for (i = 0; i < 4; i++, ptr ++)
 321                 ret = (ret << 8) |
 322                         ( ((*ptr >= 'a') &&
 323                            (*ptr <= 'z'))?
 324                           *ptr - 'a' + 'A':
 325                           *ptr);
 326
 327         return ret;
 328 }
 329
 330 void CtdlRegisterDebugFlagHook(const char *Name, long Len, CtdlDbgFunction F, const int *LogP)
 331 {
 332         LogDebugEntry *E;
 333         if (LogDebugEntryTable == NULL)
 334                 LogDebugEntryTable = NewHash(1, NULL);
 335         E = (LogDebugEntry*) malloc(sizeof(LogDebugEntry));
 336         E->F = F;
 337         E->Name = Name;
 338         E->Len = Len;
 339         E->LogP = LogP;
 340         Put(LogDebugEntryTable, Name, Len, E, NULL);
 341
 342 }
 343 void CtdlSetDebugLogFacilities(const char **Str, long n)
 344 {
 345         StrBuf *Token = NULL;
 346         StrBuf *Buf = NULL;
 347         const char *ch;
 348         int i;
 349         int DoAll = 0;
 350         void *vptr;
 351
 352         for (i=0; i < n; i++){
 353                 if ((Str[i] != NULL) && !IsEmptyStr(Str[i])) {
 354                         if (strcmp(Str[i], "all") == 0) {
 355                                 DoAll = 1;
 356                                 continue;
 357                         }
 358                         Buf = NewStrBufPlain(Str[i], -1);
 359                         ch = NULL;
 360                         if (Token == NULL)
 361                                 Token = NewStrBufPlain(NULL, StrLength(Buf));
 362                         while ((ch != StrBufNOTNULL) &&
 363                                StrBufExtract_NextToken(Token, Buf, &ch, ',')) {
 364                                 if (GetHash(LogDebugEntryTable, SKEY(Token), &vptr) &&
 365                                     (vptr != NULL))
 366                                 {
 367                                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 368                                         E->F(1);
 369                                 }
 370                         }
 371                 }
 372                 FreeStrBuf(&Buf);
 373         }
 374         FreeStrBuf(&Token);
 375         if (DoAll) {
 376                 long HKLen;
 377                 const char *ch;
 378                 HashPos *Pos;
 379
 380                 Pos = GetNewHashPos(LogDebugEntryTable, 0);
 381                 while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 382                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 383                         E->F(1);
 384                 }
 385
 386                 DeleteHashPos(&Pos);
 387         }
 388 }
 389 void CtdlDestroyDebugTable(void)
 390 {
 391
 392         DeleteHash(&LogDebugEntryTable);
 393 }
 394
 395 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 396 {
 397         ProtoFunctionHook *p;
 398
 399         if (ProtoHookList == NULL)
 400                 ProtoHookList = NewHash (1, FourHash);
 401
 402
 403         p = (ProtoFunctionHook *)
 404                 malloc(sizeof(ProtoFunctionHook));
 405
 406         if (p == NULL) {
 407                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 408                 exit(EXIT_FAILURE);
 409         }
 410         p->handler = handler;
 411         p->cmd = cmd;
 412         p->desc = desc;
 413
 414         Put(ProtoHookList, cmd, 4, p, NULL);
 415         MOD_syslog(LOG_DEBUG, "Registered server command %s (%s)\n", cmd, desc);
 416 }
 417
 418 void CtdlDestroyProtoHooks(void)
 419 {
 420
 421         DeleteHash(&ProtoHookList);
 422 }
 423
 424
 425 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 426 {
 427
 428         CleanupFunctionHook *newfcn;
 429
 430         newfcn = (CleanupFunctionHook *)
 431             malloc(sizeof(CleanupFunctionHook));
 432         newfcn->next = CleanupHookTable;
 433         newfcn->h_function_pointer = fcn_ptr;
 434         CleanupHookTable = newfcn;
 435
 436         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 437 }
 438
 439
 440 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 441 {
 442         CleanupFunctionHook *cur, *p, *last;
 443         last = NULL;
 444         cur = CleanupHookTable;
 445         while (cur != NULL)
 446         {
 447                 if (fcn_ptr == cur->h_function_pointer)
 448                 {
 449                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 450                         p = cur->next;
 451
 452                         free(cur);
 453                         cur = NULL;
 454
 455                         if (last != NULL)
 456                                 last->next = p;
 457                         else
 458                                 CleanupHookTable = p;
 459                         cur = p;
 460                 }
 461                 else {
 462                         last = cur;
 463                         cur = cur->next;
 464                 }
 465         }
 466 }
 467
 468
 469 void CtdlDestroyCleanupHooks(void)
 470 {
 471         CleanupFunctionHook *cur, *p;
 472
 473         cur = CleanupHookTable;
 474         while (cur != NULL)
 475         {
 476                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 477                 p = cur->next;
 478                 free(cur);
 479                 cur = p;
 480         }
 481         CleanupHookTable = NULL;
 482 }
 483
 484 void CtdlRegisterEVCleanupHook(void (*fcn_ptr) (void))
 485 {
 486
 487         CleanupFunctionHook *newfcn;
 488
 489         newfcn = (CleanupFunctionHook *)
 490             malloc(sizeof(CleanupFunctionHook));
 491         newfcn->next = EVCleanupHookTable;
 492         newfcn->h_function_pointer = fcn_ptr;
 493         EVCleanupHookTable = newfcn;
 494
 495         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 496 }
 497
 498
 499 void CtdlUnregisterEVCleanupHook(void (*fcn_ptr) (void))
 500 {
 501         CleanupFunctionHook *cur, *p, *last;
 502         last = NULL;
 503         cur = EVCleanupHookTable;
 504         while (cur != NULL)
 505         {
 506                 if (fcn_ptr == cur->h_function_pointer)
 507                 {
 508                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 509                         p = cur->next;
 510
 511                         free(cur);
 512                         cur = NULL;
 513
 514                         if (last != NULL)
 515                                 last->next = p;
 516                         else
 517                                 EVCleanupHookTable = p;
 518                         cur = p;
 519                 }
 520                 else {
 521                         last = cur;
 522                         cur = cur->next;
 523                 }
 524         }
 525 }
 526
 527
 528 void CtdlDestroyEVCleanupHooks(void)
 529 {
 530         CleanupFunctionHook *cur, *p;
 531
 532         cur = EVCleanupHookTable;
 533         while (cur != NULL)
 534         {
 535                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 536                 p = cur->next;
 537                 cur->h_function_pointer();
 538                 free(cur);
 539                 cur = p;
 540         }
 541         EVCleanupHookTable = NULL;
 542 }
 543
 544 void CtdlRegisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType, int Priority)
 545 {
 546         TDAPVetoHookFunctionHook *newfcn;
 547
 548         newfcn = (TDAPVetoHookFunctionHook *)
 549             malloc(sizeof(TDAPVetoHookFunctionHook));
 550         newfcn->Priority = Priority;
 551         newfcn->h_function_pointer = fcn_ptr;
 552         newfcn->eventtype = EventType;
 553
 554         TDAPVetoHookFunctionHook **pfcn;
 555         pfcn = &TDAPVetoHookTable;
 556         while ((*pfcn != NULL) &&
 557                ((*pfcn)->Priority < newfcn->Priority) &&
 558                ((*pfcn)->next != NULL))
 559                 pfcn = &(*pfcn)->next;
 560
 561         newfcn->next = *pfcn;
 562         *pfcn = newfcn;
 563
 564         MOD_syslog(LOG_DEBUG, "Registered a new TDAP Veto function (type %d Priority %d)\n",
 565                    EventType, Priority);
 566 }
 567
 568
 569 void CtdlUnregisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType)
 570 {
 571         TDAPVetoHookFunctionHook *cur, *p, *last;
 572         last = NULL;
 573         cur = TDAPVetoHookTable;
 574         while  (cur != NULL) {
 575                 if ((fcn_ptr == cur->h_function_pointer) &&
 576                     (EventType == cur->eventtype))
 577                 {
 578                         MOD_syslog(LOG_DEBUG, "Unregistered TDAP Veto function (type %d)\n",
 579                                    EventType);
 580                         p = cur->next;
 581
 582                         free(cur);
 583                         cur = NULL;
 584
 585                         if (last != NULL)
 586                                 last->next = p;
 587                         else
 588                                 TDAPVetoHookTable = p;
 589                         cur = p;
 590                 }
 591                 else {
 592                         last = cur;
 593                         cur = cur->next;
 594                 }
 595         }
 596 }
 597
 598 void CtdlDestroyTDAPVetoHooks(void)
 599 {
 600         TDAPVetoHookFunctionHook *cur, *p;
 601
 602         cur = TDAPVetoHookTable;
 603         while (cur != NULL)
 604         {
 605                 MODM_syslog(LOG_DEBUG, "Destroyed TDAP Veto function\n");
 606                 p = cur->next;
 607                 free(cur);
 608                 cur = p;
 609         }
 610         TDAPVetoHookTable = NULL;
 611 }
 612
 613
 614 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType, int Priority)
 615 {
 616         SessionFunctionHook *newfcn;
 617
 618         newfcn = (SessionFunctionHook *)
 619             malloc(sizeof(SessionFunctionHook));
 620         newfcn->Priority = Priority;
 621         newfcn->h_function_pointer = fcn_ptr;
 622         newfcn->eventtype = EventType;
 623
 624         SessionFunctionHook **pfcn;
 625         pfcn = &SessionHookTable;
 626         while ((*pfcn != NULL) &&
 627                ((*pfcn)->Priority < newfcn->Priority) &&
 628                ((*pfcn)->next != NULL))
 629                 pfcn = &(*pfcn)->next;
 630
 631         newfcn->next = *pfcn;
 632         *pfcn = newfcn;
 633
 634         MOD_syslog(LOG_DEBUG, "Registered a new session function (type %d Priority %d)\n",
 635                    EventType, Priority);
 636 }
 637
 638
 639 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 640 {
 641         SessionFunctionHook *cur, *p, *last;
 642         last = NULL;
 643         cur = SessionHookTable;
 644         while  (cur != NULL) {
 645                 if ((fcn_ptr == cur->h_function_pointer) &&
 646                     (EventType == cur->eventtype))
 647                 {
 648                         MOD_syslog(LOG_DEBUG, "Unregistered session function (type %d)\n",
 649                                    EventType);
 650                         p = cur->next;
 651
 652                         free(cur);
 653                         cur = NULL;
 654
 655                         if (last != NULL)
 656                                 last->next = p;
 657                         else
 658                                 SessionHookTable = p;
 659                         cur = p;
 660                 }
 661                 else {
 662                         last = cur;
 663                         cur = cur->next;
 664                 }
 665         }
 666 }
 667
 668 void CtdlDestroySessionHooks(void)
 669 {
 670         SessionFunctionHook *cur, *p;
 671
 672         cur = SessionHookTable;
 673         while (cur != NULL)
 674         {
 675                 MODM_syslog(LOG_DEBUG, "Destroyed session function\n");
 676                 p = cur->next;
 677                 free(cur);
 678                 cur = p;
 679         }
 680         SessionHookTable = NULL;
 681 }
 682
 683
 684 void CtdlRegisterUserHook(void (*fcn_ptr) (ctdluser *), int EventType)
 685 {
 686
 687         UserFunctionHook *newfcn;
 688
 689         newfcn = (UserFunctionHook *)
 690             malloc(sizeof(UserFunctionHook));
 691         newfcn->next = UserHookTable;
 692         newfcn->h_function_pointer = fcn_ptr;
 693         newfcn->eventtype = EventType;
 694         UserHookTable = newfcn;
 695
 696         MOD_syslog(LOG_DEBUG, "Registered a new user function (type %d)\n",
 697                    EventType);
 698 }
 699
 700
 701 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 702 {
 703         UserFunctionHook *cur, *p, *last;
 704         last = NULL;
 705         cur = UserHookTable;
 706         while (cur != NULL) {
 707                 if ((fcn_ptr == cur->h_function_pointer) &&
 708                     (EventType == cur->eventtype))
 709                 {
 710                         MOD_syslog(LOG_DEBUG, "Unregistered user function (type %d)\n",
 711                                    EventType);
 712                         p = cur->next;
 713
 714                         free(cur);
 715                         cur = NULL;
 716
 717                         if (last != NULL)
 718                                 last->next = p;
 719                         else
 720                                 UserHookTable = p;
 721                         cur = p;
 722                 }
 723                 else {
 724                         last = cur;
 725                         cur = cur->next;
 726                 }
 727         }
 728 }
 729
 730 void CtdlDestroyUserHooks(void)
 731 {
 732         UserFunctionHook *cur, *p;
 733
 734         cur = UserHookTable;
 735         while (cur != NULL)
 736         {
 737                 MODM_syslog(LOG_DEBUG, "Destroyed user function \n");
 738                 p = cur->next;
 739                 free(cur);
 740                 cur = p;
 741         }
 742         UserHookTable = NULL;
 743 }
 744
 745
 746 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *),
 747                                 int EventType)
 748 {
 749
 750         MessageFunctionHook *newfcn;
 751
 752         newfcn = (MessageFunctionHook *)
 753             malloc(sizeof(MessageFunctionHook));
 754         newfcn->next = MessageHookTable;
 755         newfcn->h_function_pointer = handler;
 756         newfcn->eventtype = EventType;
 757         MessageHookTable = newfcn;
 758
 759         MOD_syslog(LOG_DEBUG, "Registered a new message function (type %d)\n",
 760                    EventType);
 761 }
 762
 763
 764 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *),
 765                 int EventType)
 766 {
 767         MessageFunctionHook *cur, *p, *last;
 768         last = NULL;
 769         cur = MessageHookTable;
 770         while (cur != NULL) {
 771                 if ((handler == cur->h_function_pointer) &&
 772                     (EventType == cur->eventtype))
 773                 {
 774                         MOD_syslog(LOG_DEBUG, "Unregistered message function (type %d)\n",
 775                                    EventType);
 776                         p = cur->next;
 777                         free(cur);
 778                         cur = NULL;
 779
 780                         if (last != NULL)
 781                                 last->next = p;
 782                         else
 783                                 MessageHookTable = p;
 784                         cur = p;
 785                 }
 786                 else {
 787                         last = cur;
 788                         cur = cur->next;
 789                 }
 790         }
 791 }
 792
 793 void CtdlDestroyMessageHook(void)
 794 {
 795         MessageFunctionHook *cur, *p;
 796
 797         cur = MessageHookTable;
 798         while (cur != NULL)
 799         {
 800                 MOD_syslog(LOG_DEBUG, "Destroyed message function (type %d)\n", cur->eventtype);
 801                 p = cur->next;
 802                 free(cur);
 803                 cur = p;
 804         }
 805         MessageHookTable = NULL;
 806 }
 807
 808
 809 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 810 {
 811         RoomFunctionHook *newfcn;
 812
 813         newfcn = (RoomFunctionHook *)
 814             malloc(sizeof(RoomFunctionHook));
 815         newfcn->next = RoomHookTable;
 816         newfcn->fcn_ptr = fcn_ptr;
 817         RoomHookTable = newfcn;
 818
 819         MODM_syslog(LOG_DEBUG, "Registered a new room function\n");
 820 }
 821
 822
 823 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 824 {
 825         RoomFunctionHook *cur, *p, *last;
 826         last = NULL;
 827         cur = RoomHookTable;
 828         while (cur != NULL)
 829         {
 830                 if (fcn_ptr == cur->fcn_ptr) {
 831                         MODM_syslog(LOG_DEBUG, "Unregistered room function\n");
 832                         p = cur->next;
 833
 834                         free(cur);
 835                         cur = NULL;
 836
 837                         if (last != NULL)
 838                                 last->next = p;
 839                         else
 840                                 RoomHookTable = p;
 841                         cur = p;
 842                 }
 843                 else {
 844                         last = cur;
 845                         cur = cur->next;
 846                 }
 847         }
 848 }
 849
 850
 851 void CtdlDestroyRoomHooks(void)
 852 {
 853         RoomFunctionHook *cur, *p;
 854
 855         cur = RoomHookTable;
 856         while (cur != NULL)
 857         {
 858                 MODM_syslog(LOG_DEBUG, "Destroyed room function\n");
 859                 p = cur->next;
 860                 free(cur);
 861                 cur = p;
 862         }
 863         RoomHookTable = NULL;
 864 }
 865
 866 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 867 {
 868         NetprocFunctionHook *newfcn;
 869
 870         newfcn = (NetprocFunctionHook *)
 871             malloc(sizeof(NetprocFunctionHook));
 872         newfcn->next = NetprocHookTable;
 873         newfcn->h_function_pointer = handler;
 874         NetprocHookTable = newfcn;
 875
 876         MODM_syslog(LOG_DEBUG, "Registered a new netproc function\n");
 877 }
 878
 879
 880 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 881 {
 882         NetprocFunctionHook *cur, *p, *last;
 883
 884         cur = NetprocHookTable;
 885         last = NULL;
 886
 887         while (cur != NULL) {
 888                 if (handler == cur->h_function_pointer)
 889                 {
 890                         MODM_syslog(LOG_DEBUG, "Unregistered netproc function\n");
 891                         p = cur->next;
 892                         free(cur);
 893                         if (last != NULL) {
 894                                 last->next = p;
 895                         }
 896                         else {
 897                                 NetprocHookTable = p;
 898                         }
 899                         cur = p;
 900                 }
 901                 else {
 902                         last = cur;
 903                         cur = cur->next;
 904                 }
 905         }
 906 }
 907
 908 void CtdlDestroyNetprocHooks(void)
 909 {
 910         NetprocFunctionHook *cur, *p;
 911
 912         cur = NetprocHookTable;
 913         while (cur != NULL)
 914         {
 915                 MODM_syslog(LOG_DEBUG, "Destroyed netproc function\n");
 916                 p = cur->next;
 917                 free(cur);
 918                 cur = p;
 919         }
 920         NetprocHookTable = NULL;
 921 }
 922
 923
 924 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 925 {
 926         DeleteFunctionHook *newfcn;
 927
 928         newfcn = (DeleteFunctionHook *)
 929             malloc(sizeof(DeleteFunctionHook));
 930         newfcn->next = DeleteHookTable;
 931         newfcn->h_function_pointer = handler;
 932         DeleteHookTable = newfcn;
 933
 934         MODM_syslog(LOG_DEBUG, "Registered a new delete function\n");
 935 }
 936
 937
 938 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 939 {
 940         DeleteFunctionHook *cur, *p, *last;
 941
 942         last = NULL;
 943         cur = DeleteHookTable;
 944         while (cur != NULL) {
 945                 if (handler == cur->h_function_pointer )
 946                 {
 947                         MODM_syslog(LOG_DEBUG, "Unregistered delete function\n");
 948                         p = cur->next;
 949                         free(cur);
 950
 951                         if (last != NULL)
 952                                 last->next = p;
 953                         else
 954                                 DeleteHookTable = p;
 955
 956                         cur = p;
 957                 }
 958                 else {
 959                         last = cur;
 960                         cur = cur->next;
 961                 }
 962         }
 963 }
 964 void CtdlDestroyDeleteHooks(void)
 965 {
 966         DeleteFunctionHook *cur, *p;
 967
 968         cur = DeleteHookTable;
 969         while (cur != NULL)
 970         {
 971                 MODM_syslog(LOG_DEBUG, "Destroyed delete function\n");
 972                 p = cur->next;
 973                 free(cur);
 974                 cur = p;
 975         }
 976         DeleteHookTable = NULL;
 977 }
 978
 979
 980
 981
 982 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
 983 {
 984         FixedOutputHook *newfcn;
 985
 986         newfcn = (FixedOutputHook *)
 987             malloc(sizeof(FixedOutputHook));
 988         newfcn->next = FixedOutputTable;
 989         newfcn->h_function_pointer = handler;
 990         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
 991         FixedOutputTable = newfcn;
 992
 993         MOD_syslog(LOG_DEBUG, "Registered a new fixed output function for %s\n", newfcn->content_type);
 994 }
 995
 996
 997 void CtdlUnregisterFixedOutputHook(char *content_type)
 998 {
 999         FixedOutputHook *cur, *p, *last;
1000
1001         last = NULL;
1002         cur = FixedOutputTable;
1003         while (cur != NULL) {
1004                 /* This will also remove duplicates if any */
1005                 if (!strcasecmp(content_type, cur->content_type)) {
1006                         MOD_syslog(LOG_DEBUG,
1007                                    "Unregistered fixed output function for %s\n",
1008                                    content_type);
1009
1010                         p = cur->next;
1011                         free(cur);
1012
1013                         if (last != NULL)
1014                                 last->next = p;
1015                         else
1016                                 FixedOutputTable = p;
1017
1018                         cur = p;
1019                 }
1020                 else
1021                 {
1022                         last = cur;
1023                         cur = cur->next;
1024                 }
1025         }
1026 }
1027
1028 void CtdlDestroyFixedOutputHooks(void)
1029 {
1030         FixedOutputHook *cur, *p;
1031
1032         cur = FixedOutputTable;
1033         while (cur != NULL)
1034         {
1035                 MOD_syslog(LOG_DEBUG, "Destroyed fixed output function for %s\n", cur->content_type);
1036                 p = cur->next;
1037                 free(cur);
1038                 cur = p;
1039
1040         }
1041         FixedOutputTable = NULL;
1042 }
1043
1044 /* returns nonzero if we found a hook and used it */
1045 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
1046 {
1047         FixedOutputHook *fcn;
1048
1049         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
1050                 if (!strcasecmp(content_type, fcn->content_type)) {
1051                         (*fcn->h_function_pointer) (content, content_length);
1052                         return(1);
1053                 }
1054         }
1055         return(0);
1056 }
1057
1058
1059
1060
1061
1062 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1063 {
1064
1065         XmsgFunctionHook *newfcn;
1066
1067         newfcn = (XmsgFunctionHook *) malloc(sizeof(XmsgFunctionHook));
1068         newfcn->next = XmsgHookTable;
1069         newfcn->order = order;
1070         newfcn->h_function_pointer = fcn_ptr;
1071         XmsgHookTable = newfcn;
1072         MOD_syslog(LOG_DEBUG, "Registered a new x-msg function (priority %d)\n", order);
1073 }
1074
1075
1076 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1077 {
1078         XmsgFunctionHook *cur, *p, *last;
1079
1080         last = NULL;
1081         cur = XmsgHookTable;
1082         while (cur != NULL) {
1083                 /* This will also remove duplicates if any */
1084                 if (fcn_ptr == cur->h_function_pointer &&
1085                     order == cur->order) {
1086                         MOD_syslog(LOG_DEBUG, "Unregistered x-msg function "
1087                                    "(priority %d)\n", order);
1088                         p = cur->next;
1089                         free(cur);
1090
1091                         if (last != NULL)
1092                                 last->next = p;
1093                         else
1094                                 XmsgHookTable = p;
1095
1096                         cur = p;
1097                 }
1098                 else {
1099                         last = cur;
1100                         cur = cur->next;
1101                 }
1102         }
1103 }
1104
1105 void CtdlDestroyXmsgHooks(void)
1106 {
1107         XmsgFunctionHook *cur, *p;
1108
1109         cur = XmsgHookTable;
1110         while (cur != NULL)
1111         {
1112                 MOD_syslog(LOG_DEBUG, "Destroyed x-msg function "
1113                         "(priority %d)\n", cur->order);
1114                 p = cur->next;
1115
1116                 free(cur);
1117                 cur = p;
1118         }
1119         XmsgHookTable = NULL;
1120 }
1121
1122
1123 void CtdlRegisterServiceHook(int tcp_port,
1124                              char *sockpath,
1125                              void (*h_greeting_function) (void),
1126                              void (*h_command_function) (void),
1127                              void (*h_async_function) (void),
1128                              const char *ServiceName)
1129 {
1130         ServiceFunctionHook *newfcn;
1131         char *message;
1132         char error[SIZ];
1133
1134         strcpy(error, "");
1135         newfcn = (ServiceFunctionHook *) malloc(sizeof(ServiceFunctionHook));
1136         message = (char*) malloc (SIZ + SIZ);
1137
1138         newfcn->next = ServiceHookTable;
1139         newfcn->tcp_port = tcp_port;
1140         newfcn->sockpath = sockpath;
1141         newfcn->h_greeting_function = h_greeting_function;
1142         newfcn->h_command_function = h_command_function;
1143         newfcn->h_async_function = h_async_function;
1144         newfcn->ServiceName = ServiceName;
1145
1146         if (sockpath != NULL) {
1147                 newfcn->msock = ctdl_uds_server(sockpath, config.c_maxsessions, error);
1148                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
1149         }
1150         else if (tcp_port <= 0) {       /* port -1 to disable */
1151                 MOD_syslog(LOG_INFO, "Service %s has been manually disabled, skipping\n", ServiceName);
1152                 free (message);
1153                 free(newfcn);
1154                 return;
1155         }
1156         else {
1157                 newfcn->msock = ctdl_tcp_server(config.c_ip_addr,
1158                                               tcp_port,
1159                                               config.c_maxsessions,
1160                                               error);
1161                 snprintf(message, SIZ, "TCP port %s:%d: (%s) ",
1162                          config.c_ip_addr, tcp_port, ServiceName);
1163         }
1164
1165         if (newfcn->msock > 0) {
1166                 ServiceHookTable = newfcn;
1167                 strcat(message, "registered.");
1168                 MOD_syslog(LOG_INFO, "%s\n", message);
1169         }
1170         else {
1171                 AddPortError(message, error);
1172                 strcat(message, "FAILED.");
1173                 MOD_syslog(LOG_CRIT, "%s\n", message);
1174                 free(newfcn);
1175         }
1176         free(message);
1177 }
1178
1179
1180 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
1181                         void (*h_greeting_function) (void),
1182                         void (*h_command_function) (void),
1183                         void (*h_async_function) (void)
1184                         )
1185 {
1186         ServiceFunctionHook *cur, *p, *last;
1187
1188         last = NULL;
1189         cur = ServiceHookTable;
1190         while (cur != NULL) {
1191                 /* This will also remove duplicates if any */
1192                 if (h_greeting_function == cur->h_greeting_function &&
1193                     h_command_function == cur->h_command_function &&
1194                     h_async_function == cur->h_async_function &&
1195                     tcp_port == cur->tcp_port &&
1196                     !(sockpath && cur->sockpath && strcmp(sockpath, cur->sockpath)) )
1197                 {
1198                         if (cur->msock > 0)
1199                                 close(cur->msock);
1200                         if (sockpath) {
1201                                 MOD_syslog(LOG_INFO, "Closed UNIX domain socket %s\n",
1202                                            sockpath);
1203                                 unlink(sockpath);
1204                         } else if (tcp_port) {
1205                                 MOD_syslog(LOG_INFO, "Closed TCP port %d\n", tcp_port);
1206                         } else {
1207                                 MOD_syslog(LOG_INFO, "Unregistered service \"%s\"\n", cur->ServiceName);
1208                         }
1209                         p = cur->next;
1210                         free(cur);
1211                         if (last != NULL)
1212                                 last->next = p;
1213                         else
1214                                 ServiceHookTable = p;
1215                         cur = p;
1216                 }
1217                 else {
1218                         last = cur;
1219                         cur = cur->next;
1220                 }
1221         }
1222 }
1223
1224
1225 void CtdlShutdownServiceHooks(void)
1226 {
1227         /* sort of a duplicate of close_masters() but called earlier */
1228         ServiceFunctionHook *cur;
1229
1230         cur = ServiceHookTable;
1231         while (cur != NULL)
1232         {
1233                 if (cur->msock != -1)
1234                 {
1235                         close(cur->msock);
1236                         cur->msock = -1;
1237                         if (cur->sockpath != NULL){
1238                                 MOD_syslog(LOG_INFO, "[%s] Closed UNIX domain socket %s\n",
1239                                            cur->ServiceName,
1240                                            cur->sockpath);
1241                                 unlink(cur->sockpath);
1242                         } else {
1243                                 MOD_syslog(LOG_INFO, "[%s] closing service\n",
1244                                            cur->ServiceName);
1245                         }
1246                 }
1247                 cur = cur->next;
1248         }
1249 }
1250
1251 void CtdlDestroyServiceHook(void)
1252 {
1253         const char *Text;
1254         ServiceFunctionHook *cur, *p;
1255
1256         cur = ServiceHookTable;
1257         while (cur != NULL)
1258         {
1259                 if (cur->msock != -1)
1260                 {
1261                         close(cur->msock);
1262                         Text = "Closed";
1263                 }
1264                 else
1265                 {
1266                         Text = " Not closing again";
1267                 }
1268
1269                 if (cur->sockpath) {
1270                         MOD_syslog(LOG_INFO, "%s UNIX domain socket %s\n",
1271                                    Text,
1272                                    cur->sockpath);
1273                         unlink(cur->sockpath);
1274                 } else if (cur->tcp_port) {
1275                         MOD_syslog(LOG_INFO, "%s TCP port %d\n", Text, cur->tcp_port);
1276                 } else {
1277                         MOD_syslog(LOG_INFO, "Destroyed service \"%s\"\n", cur->ServiceName);
1278                 }
1279                 p = cur->next;
1280                 free(cur);
1281                 cur = p;
1282         }
1283         ServiceHookTable = NULL;
1284 }
1285
1286 void CtdlRegisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1287 {
1288         SearchFunctionHook *newfcn;
1289
1290         if (!name || !fcn_ptr) {
1291                 return;
1292         }
1293
1294         newfcn = (SearchFunctionHook *)
1295             malloc(sizeof(SearchFunctionHook));
1296         newfcn->next = SearchFunctionHookTable;
1297         newfcn->name = name;
1298         newfcn->fcn_ptr = fcn_ptr;
1299         SearchFunctionHookTable = newfcn;
1300
1301         MOD_syslog(LOG_DEBUG, "Registered a new search function (%s)\n", name);
1302 }
1303
1304 void CtdlUnregisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1305 {
1306         SearchFunctionHook *cur, *p, *last;
1307
1308         last = NULL;
1309         cur = SearchFunctionHookTable;
1310         while (cur != NULL) {
1311                 if (fcn_ptr &&
1312                     (cur->fcn_ptr == fcn_ptr) &&
1313                     name && !strcmp(name, cur->name))
1314                 {
1315                         MOD_syslog(LOG_DEBUG, "Unregistered search function(%s)\n", name);
1316                         p = cur->next;
1317                         free (cur);
1318                         if (last != NULL)
1319                                 last->next = p;
1320                         else
1321                                 SearchFunctionHookTable = p;
1322                         cur = p;
1323                 }
1324                 else {
1325                         last = cur;
1326                         cur = cur->next;
1327                 }
1328         }
1329 }
1330
1331 void CtdlDestroySearchHooks(void)
1332 {
1333         SearchFunctionHook *cur, *p;
1334
1335         cur = SearchFunctionHookTable;
1336         SearchFunctionHookTable = NULL;
1337         while (cur != NULL) {
1338                 p = cur->next;
1339                 free(cur);
1340                 cur = p;
1341         }
1342 }
1343
1344 void CtdlModuleDoSearch(int *num_msgs, long **search_msgs, const char *search_string, const char *func_name)
1345 {
1346         SearchFunctionHook *fcn = NULL;
1347
1348         for (fcn = SearchFunctionHookTable; fcn != NULL; fcn = fcn->next) {
1349                 if (!func_name || !strcmp(func_name, fcn->name)) {
1350                         (*fcn->fcn_ptr) (num_msgs, search_msgs, search_string);
1351                         return;
1352                 }
1353         }
1354         *num_msgs = 0;
1355 }
1356
1357 int CheckTDAPVeto (int DBType, StrBuf *ErrMsg)
1358 {
1359         int Result = 0;
1360         TDAPVetoHookFunctionHook *fcn = NULL;
1361
1362         for (fcn = TDAPVetoHookTable; (fcn != NULL) && (Result == 0); fcn = fcn->next) {
1363                 if (fcn->eventtype == DBType) {
1364                         Result = (*fcn->h_function_pointer) (ErrMsg);
1365                 }
1366         }
1367         return Result;
1368 }
1369
1370 void PerformSessionHooks(int EventType)
1371 {
1372         SessionFunctionHook *fcn = NULL;
1373
1374         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
1375                 if (fcn->eventtype == EventType) {
1376                         if (EventType == EVT_TIMER) {
1377                                 pthread_setspecific(MyConKey, NULL);    /* for every hook */
1378                         }
1379                         (*fcn->h_function_pointer) ();
1380                 }
1381         }
1382 }
1383
1384 void PerformUserHooks(ctdluser *usbuf, int EventType)
1385 {
1386         UserFunctionHook *fcn = NULL;
1387
1388         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
1389                 if (fcn->eventtype == EventType) {
1390                         (*fcn->h_function_pointer) (usbuf);
1391                 }
1392         }
1393 }
1394
1395 int PerformMessageHooks(struct CtdlMessage *msg, int EventType)
1396 {
1397         MessageFunctionHook *fcn = NULL;
1398         int total_retval = 0;
1399
1400         /* Other code may elect to protect this message from server-side
1401          * handlers; if this is the case, don't do anything.
1402         MOD_syslog(LOG_DEBUG, "** Event type is %d, flags are %d\n", EventType, msg->cm_flags);
1403          */
1404         if (msg->cm_flags & CM_SKIP_HOOKS) {
1405                 MODM_syslog(LOG_DEBUG, "Skipping hooks\n");
1406                 return(0);
1407         }
1408
1409         /* Otherwise, run all the hooks appropriate to this event type.
1410          */
1411         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
1412                 if (fcn->eventtype == EventType) {
1413                         total_retval = total_retval + (*fcn->h_function_pointer) (msg);
1414                 }
1415         }
1416
1417         /* Return the sum of the return codes from the hook functions.  If
1418          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
1419          * the save operation to abort.
1420          */
1421         return total_retval;
1422 }
1423
1424
1425 int PerformRoomHooks(struct ctdlroom *target_room)
1426 {
1427         RoomFunctionHook *fcn;
1428         int total_retval = 0;
1429
1430         MOD_syslog(LOG_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
1431
1432         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
1433                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
1434         }
1435
1436         /* Return the sum of the return codes from the hook functions.
1437          */
1438         return total_retval;
1439 }
1440
1441
1442 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
1443 {
1444         NetprocFunctionHook *fcn;
1445         int total_retval = 0;
1446
1447         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
1448                 total_retval = total_retval +
1449                         (*fcn->h_function_pointer) (msg, target_room);
1450         }
1451
1452         /* Return the sum of the return codes from the hook functions.
1453          * A nonzero return code will cause the message to *not* be imported.
1454          */
1455         return total_retval;
1456 }
1457
1458
1459 void PerformDeleteHooks(char *room, long msgnum)
1460 {
1461         DeleteFunctionHook *fcn;
1462
1463         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
1464                 (*fcn->h_function_pointer) (room, msgnum);
1465         }
1466 }
1467
1468
1469
1470
1471
1472 int PerformXmsgHooks(char *sender, char *sender_email, char *recp, char *msg)
1473 {
1474         XmsgFunctionHook *fcn;
1475         int total_sent = 0;
1476         int p;
1477
1478         for (p=0; p<MAX_XMSG_PRI; ++p) {
1479                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1480                         if (fcn->order == p) {
1481                                 total_sent +=
1482                                         (*fcn->h_function_pointer)
1483                                                 (sender, sender_email, recp, msg);
1484                         }
1485                 }
1486                 /* Break out of the loop if a higher-priority function
1487                  * successfully delivered the message.  This prevents duplicate
1488                  * deliveries to local users simultaneously signed onto
1489                  * remote services.
1490                  */
1491                 if (total_sent) break;
1492         }
1493         return total_sent;
1494 }
1495
1496
1497 /*
1498  * Dirty hack until we impliment a hook mechanism for this
1499  */
1500 void CtdlModuleStartCryptoMsgs(char *ok_response, char *nosup_response, char *error_response)
1501 {
1502 #ifdef HAVE_OPENSSL
1503         CtdlStartTLS (ok_response, nosup_response, error_response);
1504 #endif
1505 }
1506
1507 void DebugModulesEnable(const int n)
1508 {
1509         DebugModules = n;
1510 }
1511 CTDL_MODULE_INIT(modules)
1512 {
1513         if (!threading) {
1514                 CtdlRegisterDebugFlagHook(HKEY("modules"), DebugModulesEnable, &DebugModules);
1515         }
1516         return "modules";
1517 }