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 typedef struct __LogDebugEntry {
  46         CtdlDbgFunction F;
  47         const char *Name;
  48         long Len;
  49         const int *LogP;
  50 } LogDebugEntry;
  51 HashList *LogDebugEntryTable = NULL;
  52
  53 typedef struct LogFunctionHook LogFunctionHook;
  54 struct LogFunctionHook {
  55         LogFunctionHook *next;
  56         int loglevel;
  57         void (*h_function_pointer) (char *);
  58 };
  59
  60 LogFunctionHook *LogHookTable = NULL;
  61
  62 typedef struct FixedOutputHook FixedOutputHook;
  63 struct FixedOutputHook {
  64         FixedOutputHook *next;
  65         char content_type[64];
  66         void (*h_function_pointer) (char *, int);
  67 };
  68 FixedOutputHook *FixedOutputTable = NULL;
  69
  70
  71
  72 /*
  73  * TDAPVetoHookFunctionHook extensions are used for any type of hook for which
  74  * may prevent the autopurger to run for this specific data class.
  75  * the function should at least LOG_INFO that it does so.
  76  */
  77 typedef struct TDAPVetoHookFunctionHook TDAPVetoHookFunctionHook;
  78 struct TDAPVetoHookFunctionHook {
  79         TDAPVetoHookFunctionHook *next;
  80         int Priority;
  81         int (*h_function_pointer) (StrBuf *);
  82         int eventtype;
  83 };
  84 TDAPVetoHookFunctionHook *TDAPVetoHookTable = NULL;
  85
  86
  87
  88 /*
  89  * SessionFunctionHook extensions are used for any type of hook for which
  90  * the context in which it's being called (which is determined by the event
  91  * type) will make it obvious for the hook function to know where to look for
  92  * pertinent data.
  93  */
  94 typedef struct SessionFunctionHook SessionFunctionHook;
  95 struct SessionFunctionHook {
  96         SessionFunctionHook *next;
  97         int Priority;
  98         void (*h_function_pointer) (void);
  99         int eventtype;
 100 };
 101 SessionFunctionHook *SessionHookTable = NULL;
 102
 103 /*
 104  * UserFunctionHook extensions are used for any type of hook which implements
 105  * an operation on a user or username (potentially) other than the one
 106  * operating the current session.
 107  */
 108 typedef struct UserFunctionHook UserFunctionHook;
 109 struct UserFunctionHook {
 110         UserFunctionHook *next;
 111         void (*h_function_pointer) (struct ctdluser *usbuf);
 112         int eventtype;
 113 };
 114 UserFunctionHook *UserHookTable = NULL;
 115
 116 /*
 117  * MessageFunctionHook extensions are used for hooks which implement handlers
 118  * for various types of message operations (save, read, etc.)
 119  */
 120 typedef struct MessageFunctionHook MessageFunctionHook;
 121 struct MessageFunctionHook {
 122         MessageFunctionHook *next;
 123         int (*h_function_pointer) (struct CtdlMessage *msg);
 124         int eventtype;
 125 };
 126 MessageFunctionHook *MessageHookTable = NULL;
 127
 128
 129 /*
 130  * NetprocFunctionHook extensions are used for hooks which implement handlers
 131  * for incoming network messages.
 132  */
 133 typedef struct NetprocFunctionHook NetprocFunctionHook;
 134 struct NetprocFunctionHook {
 135         NetprocFunctionHook *next;
 136         int (*h_function_pointer) (struct CtdlMessage *msg, char *target_room);
 137 };
 138 NetprocFunctionHook *NetprocHookTable = NULL;
 139
 140
 141 /*
 142  * DeleteFunctionHook extensions are used for hooks which get called when a
 143  * message is about to be deleted.
 144  */
 145 typedef struct DeleteFunctionHook DeleteFunctionHook;
 146 struct DeleteFunctionHook {
 147         DeleteFunctionHook *next;
 148         void (*h_function_pointer) (char *target_room, long msgnum);
 149 };
 150 DeleteFunctionHook *DeleteHookTable = NULL;
 151
 152
 153 /*
 154  * ExpressMessageFunctionHook extensions are used for hooks which implement
 155  * the sending of an instant message through various channels.  Any function
 156  * registered should return the number of recipients to whom the message was
 157  * successfully transmitted.
 158  */
 159 typedef struct XmsgFunctionHook XmsgFunctionHook;
 160 struct XmsgFunctionHook {
 161         XmsgFunctionHook *next;
 162         int (*h_function_pointer) (char *, char *, char *, char *);
 163         int order;
 164 };
 165 XmsgFunctionHook *XmsgHookTable = NULL;
 166
 167
 168
 169
 170 /*
 171  * RoomFunctionHook extensions are used for hooks which impliment room
 172  * processing functions when new messages are added EG. SIEVE.
 173  */
 174 typedef struct RoomFunctionHook RoomFunctionHook;
 175 struct RoomFunctionHook {
 176         RoomFunctionHook *next;
 177         int (*fcn_ptr) (struct ctdlroom *);
 178 };
 179 RoomFunctionHook *RoomHookTable = NULL;
 180
 181
 182
 183 typedef struct SearchFunctionHook SearchFunctionHook;
 184 struct SearchFunctionHook {
 185         SearchFunctionHook *next;
 186         void (*fcn_ptr) (int *, long **, const char *);
 187         char *name;
 188 };
 189 SearchFunctionHook *SearchFunctionHookTable = NULL;
 190
 191 CleanupFunctionHook *CleanupHookTable = NULL;
 192 CleanupFunctionHook *EVCleanupHookTable = NULL;
 193
 194 ServiceFunctionHook *ServiceHookTable = NULL;
 195
 196 typedef struct ProtoFunctionHook ProtoFunctionHook;
 197 struct ProtoFunctionHook {
 198         void (*handler) (char *cmdbuf);
 199         const char *cmd;
 200         const char *desc;
 201 };
 202
 203 HashList *ProtoHookList = NULL;
 204
 205
 206 #define ERR_PORT (1 << 1)
 207
 208
 209 static StrBuf *portlist = NULL;
 210
 211 static StrBuf *errormessages = NULL;
 212
 213
 214 long   DetailErrorFlags;
 215 ConstStr Empty = {HKEY("")};
 216 char *ErrSubject = "Startup Problems";
 217 ConstStr ErrGeneral[] = {
 218         {HKEY("Citadel had trouble on starting up. ")},
 219         {HKEY(" This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
 220               "If you don't want citadel to provide these services, turn them off in WebCit via: ")},
 221         {HKEY("To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
 222               "The errors returned by the system were:\n")},
 223         {HKEY("You can recheck the above if you follow this faq item:\n"
 224               "http://www.citadel.org/doku.php?id=faq:mastering_your_os:net#netstat")}
 225 };
 226
 227 ConstStr ErrPortShort = { HKEY("We couldn't bind all ports you configured to be provided by citadel server.\n")};
 228 ConstStr ErrPortWhere = { HKEY("\"Admin->System Preferences->Network\".\n\nThe failed ports and sockets are: ")};
 229 ConstStr ErrPortHint  = { HKEY("If you want citadel to provide you with that functionality, "
 230                                "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
 231                                " and stop the program that binds these ports.\n You should eventually remove "
 232                                " their initscripts in /etc/init.d so that you won't get this trouble once more.\n"
 233                                " After that goto \"Administration -> Shutdown Citadel\" to make Citadel restart & retry to bind this port.\n")};
 234
 235
 236 void LogPrintMessages(long err)
 237 {
 238         StrBuf *Message;
 239         StrBuf *List, *DetailList;
 240         ConstStr *Short, *Where, *Hint;
 241
 242
 243         Message = NewStrBufPlain(NULL,
 244                                  StrLength(portlist) + StrLength(errormessages));
 245
 246         DetailErrorFlags = DetailErrorFlags & ~err;
 247
 248         switch (err)
 249         {
 250         case ERR_PORT:
 251                 Short = &ErrPortShort;
 252                 Where = &ErrPortWhere;
 253                 Hint  = &ErrPortHint;
 254                 List  = portlist;
 255                 DetailList = errormessages;
 256                 break;
 257         default:
 258                 Short = &Empty;
 259                 Where = &Empty;
 260                 Hint  = &Empty;
 261                 List  = NULL;
 262                 DetailList = NULL;
 263         }
 264
 265         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[0]), 0);
 266         StrBufAppendBufPlain(Message, CKEY(*Short), 0);
 267         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[1]), 0);
 268         StrBufAppendBufPlain(Message, CKEY(*Where), 0);
 269         StrBufAppendBuf(Message, List, 0);
 270         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 271         StrBufAppendBufPlain(Message, CKEY(*Hint), 0);
 272         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 273         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[2]), 0);
 274         StrBufAppendBuf(Message, DetailList, 0);
 275         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 276         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[3]), 0);
 277
 278         MOD_syslog(LOG_EMERG, "%s", ChrPtr(Message));
 279         MOD_syslog(LOG_EMERG, "%s", ErrSubject);
 280         quickie_message("Citadel", NULL, NULL, AIDEROOM, ChrPtr(Message), FMT_FIXED, ErrSubject);
 281
 282         FreeStrBuf(&Message);
 283         FreeStrBuf(&List);
 284         FreeStrBuf(&DetailList);
 285 }
 286
 287
 288 void AddPortError(char *Port, char *ErrorMessage)
 289 {
 290         long len;
 291
 292         DetailErrorFlags |= ERR_PORT;
 293
 294         len = StrLength(errormessages);
 295         if (len > 0) StrBufAppendBufPlain(errormessages, HKEY("; "), 0);
 296         else errormessages = NewStrBuf();
 297         StrBufAppendBufPlain(errormessages, ErrorMessage, -1, 0);
 298
 299
 300         len = StrLength(portlist);
 301         if (len > 0) StrBufAppendBufPlain(portlist, HKEY(";"), 0);
 302         else portlist = NewStrBuf();
 303         StrBufAppendBufPlain(portlist, Port, -1, 0);
 304 }
 305
 306
 307 int DLoader_Exec_Cmd(char *cmdbuf)
 308 {
 309         void *vP;
 310         ProtoFunctionHook *p;
 311
 312         if (GetHash(ProtoHookList, cmdbuf, 4, &vP) && (vP != NULL)) {
 313                 p = (ProtoFunctionHook*) vP;
 314                 p->handler(&cmdbuf[5]);
 315                 return 1;
 316         }
 317         return 0;
 318 }
 319
 320 long FourHash(const char *key, long length)
 321 {
 322         int i;
 323         int ret = 0;
 324         const unsigned char *ptr = (const unsigned char*)key;
 325
 326         for (i = 0; i < 4; i++, ptr ++)
 327                 ret = (ret << 8) |
 328                         ( ((*ptr >= 'a') &&
 329                            (*ptr <= 'z'))?
 330                           *ptr - 'a' + 'A':
 331                           *ptr);
 332
 333         return ret;
 334 }
 335
 336 void CtdlRegisterDebugFlagHook(const char *Name, long Len, CtdlDbgFunction F, const int *LogP)
 337 {
 338         LogDebugEntry *E;
 339         if (LogDebugEntryTable == NULL)
 340                 LogDebugEntryTable = NewHash(1, NULL);
 341         E = (LogDebugEntry*) malloc(sizeof(LogDebugEntry));
 342         E->F = F;
 343         E->Name = Name;
 344         E->Len = Len;
 345         E->LogP = LogP;
 346         Put(LogDebugEntryTable, Name, Len, E, NULL);
 347
 348 }
 349 void CtdlSetDebugLogFacilities(const char **Str, long n)
 350 {
 351         StrBuf *Token = NULL;
 352         StrBuf *Buf = NULL;
 353         const char *ch;
 354         int i;
 355         int DoAll = 0;
 356         void *vptr;
 357
 358         for (i=0; i < n; i++){
 359                 if ((Str[i] != NULL) && !IsEmptyStr(Str[i])) {
 360                         if (strcmp(Str[i], "all") == 0) {
 361                                 DoAll = 1;
 362                                 continue;
 363                         }
 364                         Buf = NewStrBufPlain(Str[i], -1);
 365                         ch = NULL;
 366                         if (Token == NULL)
 367                                 Token = NewStrBufPlain(NULL, StrLength(Buf));
 368                         while ((ch != StrBufNOTNULL) &&
 369                                StrBufExtract_NextToken(Token, Buf, &ch, ',')) {
 370                                 if (GetHash(LogDebugEntryTable, SKEY(Token), &vptr) &&
 371                                     (vptr != NULL))
 372                                 {
 373                                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 374                                         E->F(1);
 375                                 }
 376                         }
 377                 }
 378                 FreeStrBuf(&Buf);
 379         }
 380         FreeStrBuf(&Token);
 381         if (DoAll) {
 382                 long HKLen;
 383                 const char *ch;
 384                 HashPos *Pos;
 385
 386                 Pos = GetNewHashPos(LogDebugEntryTable, 0);
 387                 while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 388                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 389                         E->F(1);
 390                 }
 391
 392                 DeleteHashPos(&Pos);
 393         }
 394 }
 395 void cmd_log_get(char *argbuf)
 396 {
 397         long HKLen;
 398         const char *ch;
 399         HashPos *Pos;
 400         void *vptr;
 401
 402         if (CtdlAccessCheck(ac_aide)) return;
 403
 404         cprintf("%d Log modules enabled:\n", LISTING_FOLLOWS);
 405
 406         Pos = GetNewHashPos(LogDebugEntryTable, 0);
 407
 408         while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 409                 LogDebugEntry *E = (LogDebugEntry*)vptr;
 410                 cprintf("%s|%d\n", ch, *E->LogP);
 411         }
 412
 413         DeleteHashPos(&Pos);
 414         cprintf("000\n");
 415 }
 416 void cmd_log_set(char *argbuf)
 417 {
 418         void *vptr;
 419         int lset;
 420         int wlen;
 421         char which[SIZ] = "";
 422
 423         if (CtdlAccessCheck(ac_aide)) return;
 424
 425         wlen = extract_token(which, argbuf, 0, '|', sizeof(which));
 426         if (wlen < 0) wlen = 0;
 427         lset = extract_int(argbuf, 1);
 428         if (lset != 0) lset = 1;
 429         if (GetHash(LogDebugEntryTable, which, wlen, &vptr) &&
 430             (vptr != NULL))
 431         {
 432                 LogDebugEntry *E = (LogDebugEntry*)vptr;
 433                 E->F(lset);
 434                 cprintf("%d %s|%d\n", CIT_OK, which, lset);
 435         }
 436         else {
 437                 cprintf("%d Log setting %s not known\n",
 438                         ERROR, which);
 439         }
 440 }
 441 void CtdlDestroyDebugTable(void)
 442 {
 443
 444         DeleteHash(&LogDebugEntryTable);
 445 }
 446
 447 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 448 {
 449         ProtoFunctionHook *p;
 450
 451         if (ProtoHookList == NULL)
 452                 ProtoHookList = NewHash (1, FourHash);
 453
 454
 455         p = (ProtoFunctionHook *)
 456                 malloc(sizeof(ProtoFunctionHook));
 457
 458         if (p == NULL) {
 459                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 460                 exit(EXIT_FAILURE);
 461         }
 462         p->handler = handler;
 463         p->cmd = cmd;
 464         p->desc = desc;
 465
 466         Put(ProtoHookList, cmd, 4, p, NULL);
 467         MOD_syslog(LOG_DEBUG, "Registered server command %s (%s)\n", cmd, desc);
 468 }
 469
 470 void CtdlDestroyProtoHooks(void)
 471 {
 472
 473         DeleteHash(&ProtoHookList);
 474 }
 475
 476
 477 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 478 {
 479
 480         CleanupFunctionHook *newfcn;
 481
 482         newfcn = (CleanupFunctionHook *)
 483             malloc(sizeof(CleanupFunctionHook));
 484         newfcn->next = CleanupHookTable;
 485         newfcn->h_function_pointer = fcn_ptr;
 486         CleanupHookTable = newfcn;
 487
 488         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 489 }
 490
 491
 492 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 493 {
 494         CleanupFunctionHook *cur, *p, *last;
 495         last = NULL;
 496         cur = CleanupHookTable;
 497         while (cur != NULL)
 498         {
 499                 if (fcn_ptr == cur->h_function_pointer)
 500                 {
 501                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 502                         p = cur->next;
 503
 504                         free(cur);
 505                         cur = NULL;
 506
 507                         if (last != NULL)
 508                                 last->next = p;
 509                         else
 510                                 CleanupHookTable = p;
 511                         cur = p;
 512                 }
 513                 else {
 514                         last = cur;
 515                         cur = cur->next;
 516                 }
 517         }
 518 }
 519
 520
 521 void CtdlDestroyCleanupHooks(void)
 522 {
 523         CleanupFunctionHook *cur, *p;
 524
 525         cur = CleanupHookTable;
 526         while (cur != NULL)
 527         {
 528                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 529                 p = cur->next;
 530                 free(cur);
 531                 cur = p;
 532         }
 533         CleanupHookTable = NULL;
 534 }
 535
 536 void CtdlRegisterEVCleanupHook(void (*fcn_ptr) (void))
 537 {
 538
 539         CleanupFunctionHook *newfcn;
 540
 541         newfcn = (CleanupFunctionHook *)
 542             malloc(sizeof(CleanupFunctionHook));
 543         newfcn->next = EVCleanupHookTable;
 544         newfcn->h_function_pointer = fcn_ptr;
 545         EVCleanupHookTable = newfcn;
 546
 547         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 548 }
 549
 550
 551 void CtdlUnregisterEVCleanupHook(void (*fcn_ptr) (void))
 552 {
 553         CleanupFunctionHook *cur, *p, *last;
 554         last = NULL;
 555         cur = EVCleanupHookTable;
 556         while (cur != NULL)
 557         {
 558                 if (fcn_ptr == cur->h_function_pointer)
 559                 {
 560                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 561                         p = cur->next;
 562
 563                         free(cur);
 564                         cur = NULL;
 565
 566                         if (last != NULL)
 567                                 last->next = p;
 568                         else
 569                                 EVCleanupHookTable = p;
 570                         cur = p;
 571                 }
 572                 else {
 573                         last = cur;
 574                         cur = cur->next;
 575                 }
 576         }
 577 }
 578
 579
 580 void CtdlDestroyEVCleanupHooks(void)
 581 {
 582         CleanupFunctionHook *cur, *p;
 583
 584         cur = EVCleanupHookTable;
 585         while (cur != NULL)
 586         {
 587                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 588                 p = cur->next;
 589                 cur->h_function_pointer();
 590                 free(cur);
 591                 cur = p;
 592         }
 593         EVCleanupHookTable = NULL;
 594 }
 595
 596 void CtdlRegisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType, int Priority)
 597 {
 598         TDAPVetoHookFunctionHook *newfcn;
 599
 600         newfcn = (TDAPVetoHookFunctionHook *)
 601             malloc(sizeof(TDAPVetoHookFunctionHook));
 602         newfcn->Priority = Priority;
 603         newfcn->h_function_pointer = fcn_ptr;
 604         newfcn->eventtype = EventType;
 605
 606         TDAPVetoHookFunctionHook **pfcn;
 607         pfcn = &TDAPVetoHookTable;
 608         while ((*pfcn != NULL) &&
 609                ((*pfcn)->Priority < newfcn->Priority) &&
 610                ((*pfcn)->next != NULL))
 611                 pfcn = &(*pfcn)->next;
 612
 613         newfcn->next = *pfcn;
 614         *pfcn = newfcn;
 615
 616         MOD_syslog(LOG_DEBUG, "Registered a new TDAP Veto function (type %d Priority %d)\n",
 617                    EventType, Priority);
 618 }
 619
 620
 621 void CtdlUnregisterTDAPVetoHook(int (*fcn_ptr) (StrBuf*), int EventType)
 622 {
 623         TDAPVetoHookFunctionHook *cur, *p, *last;
 624         last = NULL;
 625         cur = TDAPVetoHookTable;
 626         while  (cur != NULL) {
 627                 if ((fcn_ptr == cur->h_function_pointer) &&
 628                     (EventType == cur->eventtype))
 629                 {
 630                         MOD_syslog(LOG_DEBUG, "Unregistered TDAP Veto function (type %d)\n",
 631                                    EventType);
 632                         p = cur->next;
 633
 634                         free(cur);
 635                         cur = NULL;
 636
 637                         if (last != NULL)
 638                                 last->next = p;
 639                         else
 640                                 TDAPVetoHookTable = p;
 641                         cur = p;
 642                 }
 643                 else {
 644                         last = cur;
 645                         cur = cur->next;
 646                 }
 647         }
 648 }
 649
 650 void CtdlDestroyTDAPVetoHooks(void)
 651 {
 652         TDAPVetoHookFunctionHook *cur, *p;
 653
 654         cur = TDAPVetoHookTable;
 655         while (cur != NULL)
 656         {
 657                 MODM_syslog(LOG_DEBUG, "Destroyed TDAP Veto function\n");
 658                 p = cur->next;
 659                 free(cur);
 660                 cur = p;
 661         }
 662         TDAPVetoHookTable = NULL;
 663 }
 664
 665
 666 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType, int Priority)
 667 {
 668         SessionFunctionHook *newfcn;
 669
 670         newfcn = (SessionFunctionHook *)
 671             malloc(sizeof(SessionFunctionHook));
 672         newfcn->Priority = Priority;
 673         newfcn->h_function_pointer = fcn_ptr;
 674         newfcn->eventtype = EventType;
 675
 676         SessionFunctionHook **pfcn;
 677         pfcn = &SessionHookTable;
 678         while ((*pfcn != NULL) &&
 679                ((*pfcn)->Priority < newfcn->Priority) &&
 680                ((*pfcn)->next != NULL))
 681                 pfcn = &(*pfcn)->next;
 682
 683         newfcn->next = *pfcn;
 684         *pfcn = newfcn;
 685
 686         MOD_syslog(LOG_DEBUG, "Registered a new session function (type %d Priority %d)\n",
 687                    EventType, Priority);
 688 }
 689
 690
 691 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 692 {
 693         SessionFunctionHook *cur, *p, *last;
 694         last = NULL;
 695         cur = SessionHookTable;
 696         while  (cur != NULL) {
 697                 if ((fcn_ptr == cur->h_function_pointer) &&
 698                     (EventType == cur->eventtype))
 699                 {
 700                         MOD_syslog(LOG_DEBUG, "Unregistered session function (type %d)\n",
 701                                    EventType);
 702                         p = cur->next;
 703
 704                         free(cur);
 705                         cur = NULL;
 706
 707                         if (last != NULL)
 708                                 last->next = p;
 709                         else
 710                                 SessionHookTable = p;
 711                         cur = p;
 712                 }
 713                 else {
 714                         last = cur;
 715                         cur = cur->next;
 716                 }
 717         }
 718 }
 719
 720 void CtdlDestroySessionHooks(void)
 721 {
 722         SessionFunctionHook *cur, *p;
 723
 724         cur = SessionHookTable;
 725         while (cur != NULL)
 726         {
 727                 MODM_syslog(LOG_DEBUG, "Destroyed session function\n");
 728                 p = cur->next;
 729                 free(cur);
 730                 cur = p;
 731         }
 732         SessionHookTable = NULL;
 733 }
 734
 735
 736 void CtdlRegisterUserHook(void (*fcn_ptr) (ctdluser *), int EventType)
 737 {
 738
 739         UserFunctionHook *newfcn;
 740
 741         newfcn = (UserFunctionHook *)
 742             malloc(sizeof(UserFunctionHook));
 743         newfcn->next = UserHookTable;
 744         newfcn->h_function_pointer = fcn_ptr;
 745         newfcn->eventtype = EventType;
 746         UserHookTable = newfcn;
 747
 748         MOD_syslog(LOG_DEBUG, "Registered a new user function (type %d)\n",
 749                    EventType);
 750 }
 751
 752
 753 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 754 {
 755         UserFunctionHook *cur, *p, *last;
 756         last = NULL;
 757         cur = UserHookTable;
 758         while (cur != NULL) {
 759                 if ((fcn_ptr == cur->h_function_pointer) &&
 760                     (EventType == cur->eventtype))
 761                 {
 762                         MOD_syslog(LOG_DEBUG, "Unregistered user function (type %d)\n",
 763                                    EventType);
 764                         p = cur->next;
 765
 766                         free(cur);
 767                         cur = NULL;
 768
 769                         if (last != NULL)
 770                                 last->next = p;
 771                         else
 772                                 UserHookTable = p;
 773                         cur = p;
 774                 }
 775                 else {
 776                         last = cur;
 777                         cur = cur->next;
 778                 }
 779         }
 780 }
 781
 782 void CtdlDestroyUserHooks(void)
 783 {
 784         UserFunctionHook *cur, *p;
 785
 786         cur = UserHookTable;
 787         while (cur != NULL)
 788         {
 789                 MODM_syslog(LOG_DEBUG, "Destroyed user function \n");
 790                 p = cur->next;
 791                 free(cur);
 792                 cur = p;
 793         }
 794         UserHookTable = NULL;
 795 }
 796
 797
 798 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *),
 799                                 int EventType)
 800 {
 801
 802         MessageFunctionHook *newfcn;
 803
 804         newfcn = (MessageFunctionHook *)
 805             malloc(sizeof(MessageFunctionHook));
 806         newfcn->next = MessageHookTable;
 807         newfcn->h_function_pointer = handler;
 808         newfcn->eventtype = EventType;
 809         MessageHookTable = newfcn;
 810
 811         MOD_syslog(LOG_DEBUG, "Registered a new message function (type %d)\n",
 812                    EventType);
 813 }
 814
 815
 816 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *),
 817                 int EventType)
 818 {
 819         MessageFunctionHook *cur, *p, *last;
 820         last = NULL;
 821         cur = MessageHookTable;
 822         while (cur != NULL) {
 823                 if ((handler == cur->h_function_pointer) &&
 824                     (EventType == cur->eventtype))
 825                 {
 826                         MOD_syslog(LOG_DEBUG, "Unregistered message function (type %d)\n",
 827                                    EventType);
 828                         p = cur->next;
 829                         free(cur);
 830                         cur = NULL;
 831
 832                         if (last != NULL)
 833                                 last->next = p;
 834                         else
 835                                 MessageHookTable = p;
 836                         cur = p;
 837                 }
 838                 else {
 839                         last = cur;
 840                         cur = cur->next;
 841                 }
 842         }
 843 }
 844
 845 void CtdlDestroyMessageHook(void)
 846 {
 847         MessageFunctionHook *cur, *p;
 848
 849         cur = MessageHookTable;
 850         while (cur != NULL)
 851         {
 852                 MOD_syslog(LOG_DEBUG, "Destroyed message function (type %d)\n", cur->eventtype);
 853                 p = cur->next;
 854                 free(cur);
 855                 cur = p;
 856         }
 857         MessageHookTable = NULL;
 858 }
 859
 860
 861 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 862 {
 863         RoomFunctionHook *newfcn;
 864
 865         newfcn = (RoomFunctionHook *)
 866             malloc(sizeof(RoomFunctionHook));
 867         newfcn->next = RoomHookTable;
 868         newfcn->fcn_ptr = fcn_ptr;
 869         RoomHookTable = newfcn;
 870
 871         MODM_syslog(LOG_DEBUG, "Registered a new room function\n");
 872 }
 873
 874
 875 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 876 {
 877         RoomFunctionHook *cur, *p, *last;
 878         last = NULL;
 879         cur = RoomHookTable;
 880         while (cur != NULL)
 881         {
 882                 if (fcn_ptr == cur->fcn_ptr) {
 883                         MODM_syslog(LOG_DEBUG, "Unregistered room function\n");
 884                         p = cur->next;
 885
 886                         free(cur);
 887                         cur = NULL;
 888
 889                         if (last != NULL)
 890                                 last->next = p;
 891                         else
 892                                 RoomHookTable = p;
 893                         cur = p;
 894                 }
 895                 else {
 896                         last = cur;
 897                         cur = cur->next;
 898                 }
 899         }
 900 }
 901
 902
 903 void CtdlDestroyRoomHooks(void)
 904 {
 905         RoomFunctionHook *cur, *p;
 906
 907         cur = RoomHookTable;
 908         while (cur != NULL)
 909         {
 910                 MODM_syslog(LOG_DEBUG, "Destroyed room function\n");
 911                 p = cur->next;
 912                 free(cur);
 913                 cur = p;
 914         }
 915         RoomHookTable = NULL;
 916 }
 917
 918 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 919 {
 920         NetprocFunctionHook *newfcn;
 921
 922         newfcn = (NetprocFunctionHook *)
 923             malloc(sizeof(NetprocFunctionHook));
 924         newfcn->next = NetprocHookTable;
 925         newfcn->h_function_pointer = handler;
 926         NetprocHookTable = newfcn;
 927
 928         MODM_syslog(LOG_DEBUG, "Registered a new netproc function\n");
 929 }
 930
 931
 932 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 933 {
 934         NetprocFunctionHook *cur, *p, *last;
 935
 936         cur = NetprocHookTable;
 937         last = NULL;
 938
 939         while (cur != NULL) {
 940                 if (handler == cur->h_function_pointer)
 941                 {
 942                         MODM_syslog(LOG_DEBUG, "Unregistered netproc function\n");
 943                         p = cur->next;
 944                         free(cur);
 945                         if (last != NULL) {
 946                                 last->next = p;
 947                         }
 948                         else {
 949                                 NetprocHookTable = p;
 950                         }
 951                         cur = p;
 952                 }
 953                 else {
 954                         last = cur;
 955                         cur = cur->next;
 956                 }
 957         }
 958 }
 959
 960 void CtdlDestroyNetprocHooks(void)
 961 {
 962         NetprocFunctionHook *cur, *p;
 963
 964         cur = NetprocHookTable;
 965         while (cur != NULL)
 966         {
 967                 MODM_syslog(LOG_DEBUG, "Destroyed netproc function\n");
 968                 p = cur->next;
 969                 free(cur);
 970                 cur = p;
 971         }
 972         NetprocHookTable = NULL;
 973 }
 974
 975
 976 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 977 {
 978         DeleteFunctionHook *newfcn;
 979
 980         newfcn = (DeleteFunctionHook *)
 981             malloc(sizeof(DeleteFunctionHook));
 982         newfcn->next = DeleteHookTable;
 983         newfcn->h_function_pointer = handler;
 984         DeleteHookTable = newfcn;
 985
 986         MODM_syslog(LOG_DEBUG, "Registered a new delete function\n");
 987 }
 988
 989
 990 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 991 {
 992         DeleteFunctionHook *cur, *p, *last;
 993
 994         last = NULL;
 995         cur = DeleteHookTable;
 996         while (cur != NULL) {
 997                 if (handler == cur->h_function_pointer )
 998                 {
 999                         MODM_syslog(LOG_DEBUG, "Unregistered delete function\n");
1000                         p = cur->next;
1001                         free(cur);
1002
1003                         if (last != NULL)
1004                                 last->next = p;
1005                         else
1006                                 DeleteHookTable = p;
1007
1008                         cur = p;
1009                 }
1010                 else {
1011                         last = cur;
1012                         cur = cur->next;
1013                 }
1014         }
1015 }
1016 void CtdlDestroyDeleteHooks(void)
1017 {
1018         DeleteFunctionHook *cur, *p;
1019
1020         cur = DeleteHookTable;
1021         while (cur != NULL)
1022         {
1023                 MODM_syslog(LOG_DEBUG, "Destroyed delete function\n");
1024                 p = cur->next;
1025                 free(cur);
1026                 cur = p;
1027         }
1028         DeleteHookTable = NULL;
1029 }
1030
1031
1032
1033
1034 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
1035 {
1036         FixedOutputHook *newfcn;
1037
1038         newfcn = (FixedOutputHook *)
1039             malloc(sizeof(FixedOutputHook));
1040         newfcn->next = FixedOutputTable;
1041         newfcn->h_function_pointer = handler;
1042         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
1043         FixedOutputTable = newfcn;
1044
1045         MOD_syslog(LOG_DEBUG, "Registered a new fixed output function for %s\n", newfcn->content_type);
1046 }
1047
1048
1049 void CtdlUnregisterFixedOutputHook(char *content_type)
1050 {
1051         FixedOutputHook *cur, *p, *last;
1052
1053         last = NULL;
1054         cur = FixedOutputTable;
1055         while (cur != NULL) {
1056                 /* This will also remove duplicates if any */
1057                 if (!strcasecmp(content_type, cur->content_type)) {
1058                         MOD_syslog(LOG_DEBUG,
1059                                    "Unregistered fixed output function for %s\n",
1060                                    content_type);
1061
1062                         p = cur->next;
1063                         free(cur);
1064
1065                         if (last != NULL)
1066                                 last->next = p;
1067                         else
1068                                 FixedOutputTable = p;
1069
1070                         cur = p;
1071                 }
1072                 else
1073                 {
1074                         last = cur;
1075                         cur = cur->next;
1076                 }
1077         }
1078 }
1079
1080 void CtdlDestroyFixedOutputHooks(void)
1081 {
1082         FixedOutputHook *cur, *p;
1083
1084         cur = FixedOutputTable;
1085         while (cur != NULL)
1086         {
1087                 MOD_syslog(LOG_DEBUG, "Destroyed fixed output function for %s\n", cur->content_type);
1088                 p = cur->next;
1089                 free(cur);
1090                 cur = p;
1091
1092         }
1093         FixedOutputTable = NULL;
1094 }
1095
1096 /* returns nonzero if we found a hook and used it */
1097 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
1098 {
1099         FixedOutputHook *fcn;
1100
1101         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
1102                 if (!strcasecmp(content_type, fcn->content_type)) {
1103                         (*fcn->h_function_pointer) (content, content_length);
1104                         return(1);
1105                 }
1106         }
1107         return(0);
1108 }
1109
1110
1111
1112
1113
1114 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1115 {
1116
1117         XmsgFunctionHook *newfcn;
1118
1119         newfcn = (XmsgFunctionHook *) malloc(sizeof(XmsgFunctionHook));
1120         newfcn->next = XmsgHookTable;
1121         newfcn->order = order;
1122         newfcn->h_function_pointer = fcn_ptr;
1123         XmsgHookTable = newfcn;
1124         MOD_syslog(LOG_DEBUG, "Registered a new x-msg function (priority %d)\n", order);
1125 }
1126
1127
1128 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
1129 {
1130         XmsgFunctionHook *cur, *p, *last;
1131
1132         last = NULL;
1133         cur = XmsgHookTable;
1134         while (cur != NULL) {
1135                 /* This will also remove duplicates if any */
1136                 if (fcn_ptr == cur->h_function_pointer &&
1137                     order == cur->order) {
1138                         MOD_syslog(LOG_DEBUG, "Unregistered x-msg function "
1139                                    "(priority %d)\n", order);
1140                         p = cur->next;
1141                         free(cur);
1142
1143                         if (last != NULL)
1144                                 last->next = p;
1145                         else
1146                                 XmsgHookTable = p;
1147
1148                         cur = p;
1149                 }
1150                 else {
1151                         last = cur;
1152                         cur = cur->next;
1153                 }
1154         }
1155 }
1156
1157 void CtdlDestroyXmsgHooks(void)
1158 {
1159         XmsgFunctionHook *cur, *p;
1160
1161         cur = XmsgHookTable;
1162         while (cur != NULL)
1163         {
1164                 MOD_syslog(LOG_DEBUG, "Destroyed x-msg function "
1165                         "(priority %d)\n", cur->order);
1166                 p = cur->next;
1167
1168                 free(cur);
1169                 cur = p;
1170         }
1171         XmsgHookTable = NULL;
1172 }
1173
1174
1175 void CtdlRegisterServiceHook(int tcp_port,
1176                              char *sockpath,
1177                              void (*h_greeting_function) (void),
1178                              void (*h_command_function) (void),
1179                              void (*h_async_function) (void),
1180                              const char *ServiceName)
1181 {
1182         ServiceFunctionHook *newfcn;
1183         char *message;
1184         char error[SIZ];
1185
1186         strcpy(error, "");
1187         newfcn = (ServiceFunctionHook *) malloc(sizeof(ServiceFunctionHook));
1188         message = (char*) malloc (SIZ + SIZ);
1189
1190         newfcn->next = ServiceHookTable;
1191         newfcn->tcp_port = tcp_port;
1192         newfcn->sockpath = sockpath;
1193         newfcn->h_greeting_function = h_greeting_function;
1194         newfcn->h_command_function = h_command_function;
1195         newfcn->h_async_function = h_async_function;
1196         newfcn->ServiceName = ServiceName;
1197
1198         if (sockpath != NULL) {
1199                 newfcn->msock = ctdl_uds_server(sockpath, config.c_maxsessions, error);
1200                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
1201         }
1202         else if (tcp_port <= 0) {       /* port -1 to disable */
1203                 MOD_syslog(LOG_INFO, "Service %s has been manually disabled, skipping\n", ServiceName);
1204                 free (message);
1205                 free(newfcn);
1206                 return;
1207         }
1208         else {
1209                 newfcn->msock = ctdl_tcp_server(config.c_ip_addr,
1210                                               tcp_port,
1211                                               config.c_maxsessions,
1212                                               error);
1213                 snprintf(message, SIZ, "TCP port %s:%d: (%s) ",
1214                          config.c_ip_addr, tcp_port, ServiceName);
1215         }
1216
1217         if (newfcn->msock > 0) {
1218                 ServiceHookTable = newfcn;
1219                 strcat(message, "registered.");
1220                 MOD_syslog(LOG_INFO, "%s\n", message);
1221         }
1222         else {
1223                 AddPortError(message, error);
1224                 strcat(message, "FAILED.");
1225                 MOD_syslog(LOG_CRIT, "%s\n", message);
1226                 free(newfcn);
1227         }
1228         free(message);
1229 }
1230
1231
1232 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
1233                         void (*h_greeting_function) (void),
1234                         void (*h_command_function) (void),
1235                         void (*h_async_function) (void)
1236                         )
1237 {
1238         ServiceFunctionHook *cur, *p, *last;
1239
1240         last = NULL;
1241         cur = ServiceHookTable;
1242         while (cur != NULL) {
1243                 /* This will also remove duplicates if any */
1244                 if (h_greeting_function == cur->h_greeting_function &&
1245                     h_command_function == cur->h_command_function &&
1246                     h_async_function == cur->h_async_function &&
1247                     tcp_port == cur->tcp_port &&
1248                     !(sockpath && cur->sockpath && strcmp(sockpath, cur->sockpath)) )
1249                 {
1250                         if (cur->msock > 0)
1251                                 close(cur->msock);
1252                         if (sockpath) {
1253                                 MOD_syslog(LOG_INFO, "Closed UNIX domain socket %s\n",
1254                                            sockpath);
1255                                 unlink(sockpath);
1256                         } else if (tcp_port) {
1257                                 MOD_syslog(LOG_INFO, "Closed TCP port %d\n", tcp_port);
1258                         } else {
1259                                 MOD_syslog(LOG_INFO, "Unregistered service \"%s\"\n", cur->ServiceName);
1260                         }
1261                         p = cur->next;
1262                         free(cur);
1263                         if (last != NULL)
1264                                 last->next = p;
1265                         else
1266                                 ServiceHookTable = p;
1267                         cur = p;
1268                 }
1269                 else {
1270                         last = cur;
1271                         cur = cur->next;
1272                 }
1273         }
1274 }
1275
1276
1277 void CtdlShutdownServiceHooks(void)
1278 {
1279         /* sort of a duplicate of close_masters() but called earlier */
1280         ServiceFunctionHook *cur;
1281
1282         cur = ServiceHookTable;
1283         while (cur != NULL)
1284         {
1285                 if (cur->msock != -1)
1286                 {
1287                         close(cur->msock);
1288                         cur->msock = -1;
1289                         if (cur->sockpath != NULL){
1290                                 MOD_syslog(LOG_INFO, "[%s] Closed UNIX domain socket %s\n",
1291                                            cur->ServiceName,
1292                                            cur->sockpath);
1293                                 unlink(cur->sockpath);
1294                         } else {
1295                                 MOD_syslog(LOG_INFO, "[%s] closing service\n",
1296                                            cur->ServiceName);
1297                         }
1298                 }
1299                 cur = cur->next;
1300         }
1301 }
1302
1303 void CtdlDestroyServiceHook(void)
1304 {
1305         const char *Text;
1306         ServiceFunctionHook *cur, *p;
1307
1308         cur = ServiceHookTable;
1309         while (cur != NULL)
1310         {
1311                 if (cur->msock != -1)
1312                 {
1313                         close(cur->msock);
1314                         Text = "Closed";
1315                 }
1316                 else
1317                 {
1318                         Text = " Not closing again";
1319                 }
1320
1321                 if (cur->sockpath) {
1322                         MOD_syslog(LOG_INFO, "%s UNIX domain socket %s\n",
1323                                    Text,
1324                                    cur->sockpath);
1325                         unlink(cur->sockpath);
1326                 } else if (cur->tcp_port) {
1327                         MOD_syslog(LOG_INFO, "%s TCP port %d\n", Text, cur->tcp_port);
1328                 } else {
1329                         MOD_syslog(LOG_INFO, "Destroyed service \"%s\"\n", cur->ServiceName);
1330                 }
1331                 p = cur->next;
1332                 free(cur);
1333                 cur = p;
1334         }
1335         ServiceHookTable = NULL;
1336 }
1337
1338 void CtdlRegisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1339 {
1340         SearchFunctionHook *newfcn;
1341
1342         if (!name || !fcn_ptr) {
1343                 return;
1344         }
1345
1346         newfcn = (SearchFunctionHook *)
1347             malloc(sizeof(SearchFunctionHook));
1348         newfcn->next = SearchFunctionHookTable;
1349         newfcn->name = name;
1350         newfcn->fcn_ptr = fcn_ptr;
1351         SearchFunctionHookTable = newfcn;
1352
1353         MOD_syslog(LOG_DEBUG, "Registered a new search function (%s)\n", name);
1354 }
1355
1356 void CtdlUnregisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1357 {
1358         SearchFunctionHook *cur, *p, *last;
1359
1360         last = NULL;
1361         cur = SearchFunctionHookTable;
1362         while (cur != NULL) {
1363                 if (fcn_ptr &&
1364                     (cur->fcn_ptr == fcn_ptr) &&
1365                     name && !strcmp(name, cur->name))
1366                 {
1367                         MOD_syslog(LOG_DEBUG, "Unregistered search function(%s)\n", name);
1368                         p = cur->next;
1369                         free (cur);
1370                         if (last != NULL)
1371                                 last->next = p;
1372                         else
1373                                 SearchFunctionHookTable = p;
1374                         cur = p;
1375                 }
1376                 else {
1377                         last = cur;
1378                         cur = cur->next;
1379                 }
1380         }
1381 }
1382
1383 void CtdlDestroySearchHooks(void)
1384 {
1385         SearchFunctionHook *cur, *p;
1386
1387         cur = SearchFunctionHookTable;
1388         SearchFunctionHookTable = NULL;
1389         while (cur != NULL) {
1390                 p = cur->next;
1391                 free(cur);
1392                 cur = p;
1393         }
1394 }
1395
1396 void CtdlModuleDoSearch(int *num_msgs, long **search_msgs, const char *search_string, const char *func_name)
1397 {
1398         SearchFunctionHook *fcn = NULL;
1399
1400         for (fcn = SearchFunctionHookTable; fcn != NULL; fcn = fcn->next) {
1401                 if (!func_name || !strcmp(func_name, fcn->name)) {
1402                         (*fcn->fcn_ptr) (num_msgs, search_msgs, search_string);
1403                         return;
1404                 }
1405         }
1406         *num_msgs = 0;
1407 }
1408
1409 int CheckTDAPVeto (int DBType, StrBuf *ErrMsg)
1410 {
1411         int Result = 0;
1412         TDAPVetoHookFunctionHook *fcn = NULL;
1413
1414         for (fcn = TDAPVetoHookTable; (fcn != NULL) && (Result == 0); fcn = fcn->next) {
1415                 if (fcn->eventtype == DBType) {
1416                         Result = (*fcn->h_function_pointer) (ErrMsg);
1417                 }
1418         }
1419         return Result;
1420 }
1421
1422 void PerformSessionHooks(int EventType)
1423 {
1424         SessionFunctionHook *fcn = NULL;
1425
1426         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
1427                 if (fcn->eventtype == EventType) {
1428                         if (EventType == EVT_TIMER) {
1429                                 pthread_setspecific(MyConKey, NULL);    /* for every hook */
1430                         }
1431                         (*fcn->h_function_pointer) ();
1432                 }
1433         }
1434 }
1435
1436 void PerformUserHooks(ctdluser *usbuf, int EventType)
1437 {
1438         UserFunctionHook *fcn = NULL;
1439
1440         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
1441                 if (fcn->eventtype == EventType) {
1442                         (*fcn->h_function_pointer) (usbuf);
1443                 }
1444         }
1445 }
1446
1447 int PerformMessageHooks(struct CtdlMessage *msg, int EventType)
1448 {
1449         MessageFunctionHook *fcn = NULL;
1450         int total_retval = 0;
1451
1452         /* Other code may elect to protect this message from server-side
1453          * handlers; if this is the case, don't do anything.
1454         MOD_syslog(LOG_DEBUG, "** Event type is %d, flags are %d\n", EventType, msg->cm_flags);
1455          */
1456         if (msg->cm_flags & CM_SKIP_HOOKS) {
1457                 MODM_syslog(LOG_DEBUG, "Skipping hooks\n");
1458                 return(0);
1459         }
1460
1461         /* Otherwise, run all the hooks appropriate to this event type.
1462          */
1463         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
1464                 if (fcn->eventtype == EventType) {
1465                         total_retval = total_retval + (*fcn->h_function_pointer) (msg);
1466                 }
1467         }
1468
1469         /* Return the sum of the return codes from the hook functions.  If
1470          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
1471          * the save operation to abort.
1472          */
1473         return total_retval;
1474 }
1475
1476
1477 int PerformRoomHooks(struct ctdlroom *target_room)
1478 {
1479         RoomFunctionHook *fcn;
1480         int total_retval = 0;
1481
1482         MOD_syslog(LOG_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
1483
1484         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
1485                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
1486         }
1487
1488         /* Return the sum of the return codes from the hook functions.
1489          */
1490         return total_retval;
1491 }
1492
1493
1494 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
1495 {
1496         NetprocFunctionHook *fcn;
1497         int total_retval = 0;
1498
1499         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
1500                 total_retval = total_retval +
1501                         (*fcn->h_function_pointer) (msg, target_room);
1502         }
1503
1504         /* Return the sum of the return codes from the hook functions.
1505          * A nonzero return code will cause the message to *not* be imported.
1506          */
1507         return total_retval;
1508 }
1509
1510
1511 void PerformDeleteHooks(char *room, long msgnum)
1512 {
1513         DeleteFunctionHook *fcn;
1514
1515         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
1516                 (*fcn->h_function_pointer) (room, msgnum);
1517         }
1518 }
1519
1520
1521
1522
1523
1524 int PerformXmsgHooks(char *sender, char *sender_email, char *recp, char *msg)
1525 {
1526         XmsgFunctionHook *fcn;
1527         int total_sent = 0;
1528         int p;
1529
1530         for (p=0; p<MAX_XMSG_PRI; ++p) {
1531                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1532                         if (fcn->order == p) {
1533                                 total_sent +=
1534                                         (*fcn->h_function_pointer)
1535                                                 (sender, sender_email, recp, msg);
1536                         }
1537                 }
1538                 /* Break out of the loop if a higher-priority function
1539                  * successfully delivered the message.  This prevents duplicate
1540                  * deliveries to local users simultaneously signed onto
1541                  * remote services.
1542                  */
1543                 if (total_sent) break;
1544         }
1545         return total_sent;
1546 }
1547
1548
1549 /*
1550  * Dirty hack until we impliment a hook mechanism for this
1551  */
1552 void CtdlModuleStartCryptoMsgs(char *ok_response, char *nosup_response, char *error_response)
1553 {
1554 #ifdef HAVE_OPENSSL
1555         CtdlStartTLS (ok_response, nosup_response, error_response);
1556 #endif
1557 }
1558
1559 void DebugModulesEnable(const int n)
1560 {
1561         DebugModules = n;
1562 }
1563 CTDL_MODULE_INIT(modules)
1564 {
1565         if (!threading) {
1566                 CtdlRegisterDebugFlagHook(HKEY("modules"), DebugModulesEnable, &DebugModules);
1567
1568                 CtdlRegisterProtoHook(cmd_log_get, "LOGP", "Print Log-parameters");
1569                 CtdlRegisterProtoHook(cmd_log_set, "LOGS", "Set Log-parameters");
1570         }
1571         return "modules";
1572 }