citadel/serv_extensions.c

   1 /*
   2  * $Id$
   3  *
   4  * Citadel Dynamic Loading Module
   5  * Written by Brian Costello <btx@calyx.net>
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <sys/types.h>
  14 #include <dirent.h>
  15 #include <string.h>
  16 #include <limits.h>
  17 #include <ctype.h>
  18 #include "citadel.h"
  19 #include "server.h"
  20 #include "serv_extensions.h"
  21 #include "sysdep_decls.h"
  22 #include "msgbase.h"
  23 #include "tools.h"
  24 #include "config.h"
  25
  26 #include "modules/crypto/serv_crypto.h" /* Needed until a universal crypto startup hook is implimented for CtdlStartTLS */
  27
  28 #ifndef HAVE_SNPRINTF
  29 #include <stdarg.h>
  30 #include "snprintf.h"
  31 #endif
  32
  33 struct CleanupFunctionHook *CleanupHookTable = NULL;
  34 struct SessionFunctionHook *SessionHookTable = NULL;
  35 struct UserFunctionHook *UserHookTable = NULL;
  36 struct XmsgFunctionHook *XmsgHookTable = NULL;
  37 struct MessageFunctionHook *MessageHookTable = NULL;
  38 struct NetprocFunctionHook *NetprocHookTable = NULL;
  39 struct DeleteFunctionHook *DeleteHookTable = NULL;
  40 struct ServiceFunctionHook *ServiceHookTable = NULL;
  41 struct FixedOutputHook *FixedOutputTable = NULL;
  42 struct RoomFunctionHook *RoomHookTable = NULL;
  43 struct MaintenanceThreadHook *MaintenanceThreadHookTable = NULL;
  44 struct SearchFunctionHook *SearchFunctionHookTable = NULL;
  45
  46 struct ProtoFunctionHook {
  47         void (*handler) (char *cmdbuf);
  48         char *cmd;
  49         char *desc;
  50         struct ProtoFunctionHook *next;
  51 } *ProtoHookList = NULL;
  52
  53
  54 #define ERR_PORT (1 << 1)
  55
  56
  57 static char *portlist = NULL;
  58 static size_t nSizPort = 0;
  59
  60 static char *errormessages = NULL;
  61 size_t nSizErrmsg = 0;
  62
  63
  64 long   DetailErrorFlags;
  65
  66 char *ErrSubject = "Startup Problems";
  67 char *ErrGeneral = "Citadel had trouble on starting up. %s This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
  68 "If you don't want citadel to provide these services, turn them off in WebCit via %s%s\n\n%s\n\n"
  69 "To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
  70 "The errors returned by the system were:\n%s\n"
  71 "You can recheck the above if you follow this faq item:\n"
  72 "http://www.citadel.org/doku.php/faq:mastering_your_os:net#netstat";
  73
  74
  75 char *ErrPortShort = "We couldn't bind all ports you configured to be provided by citadel server.";
  76 char *ErrPortWhere = "Admin->System Preferences->Network.\n\nThe failed ports and sockets are: ";
  77 char *ErrPortHint = "If you want citadel to provide you with that functionality, "
  78 "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
  79 " and stop the programm, that binds these ports. You should eventually remove "
  80 " their initscripts in /etc/init.d so that you won't get this trouble once more.\n";
  81
  82
  83 void LogPrintMessages(long err)
  84 {
  85         char *List, *DetailList, *Short, *Where, *Hint, *Message;
  86         int n = nSizPort + nSizErrmsg + 5;
  87
  88         Message = (char*) malloc(n * SIZ);
  89
  90         switch (err)
  91         {
  92         case ERR_PORT:
  93                 Short = ErrPortShort;
  94                 Where = ErrPortWhere;
  95                 Hint  = ErrPortHint;
  96                 List  = portlist;
  97                 DetailList = errormessages;
  98                 break;
  99         default:
 100                 Short = "";
 101                 Where = "";
 102                 Hint  = "";
 103                 List  = "";
 104                 DetailList = "";
 105         }
 106
 107
 108         snprintf(Message, n * SIZ, ErrGeneral, Short, Where, List, Hint, DetailList);
 109
 110         lprintf(0,Message);
 111         lprintf(0,ErrSubject);
 112         quickie_message("Citadel", NULL, NULL, AIDEROOM, Message, FMT_FIXED, ErrSubject);
 113         if (errormessages!=NULL) free (errormessages);
 114         errormessages = NULL;
 115         if (portlist!=NULL) free (portlist);
 116         portlist = NULL;
 117         free(Message);
 118 }
 119
 120
 121
 122 void AppendString(char **target, char *append, size_t *len, size_t rate)
 123 {
 124         size_t oLen = 0;
 125         long AddLen;
 126         long RelPtr = 0;
 127
 128         AddLen = strlen(append);
 129
 130         if (*len == 0)
 131         {
 132                 *len = rate;
 133
 134                 *target = (char*)malloc (*len * SIZ);
 135         }
 136         else
 137         {
 138                 oLen = strlen(*target);
 139                 RelPtr = strlen(*target);
 140                 if (oLen + AddLen + 2 > *len * SIZ)
 141                 {
 142                         char *Buff = *target;
 143                         size_t NewSiz = *len + 10;
 144                         *target = malloc (NewSiz * SIZ);
 145                         memcpy (*target, Buff, NewSiz * SIZ);
 146                         *len = NewSiz;
 147                 }
 148         }
 149         memcpy (*target + oLen, append, AddLen);
 150         (*target)[oLen + AddLen + 1] = '\n';
 151         (*target)[oLen + AddLen + 2] = '\0';
 152 }
 153
 154 void AddPortError(char *Port, char *ErrorMessage)
 155 {
 156         char *pos;
 157         long len;
 158
 159         DetailErrorFlags |= ERR_PORT;
 160
 161         AppendString(&errormessages, ErrorMessage, &nSizErrmsg, 10);
 162         AppendString(&portlist, Port, &nSizPort, 2);
 163
 164         pos = strchr (portlist, ':');
 165         if (pos != NULL) *pos = ';';
 166
 167         len = strlen (errormessages);
 168         if (nSizErrmsg * SIZ > len + 3)
 169         {
 170                 errormessages[len] = ';';
 171                 errormessages[len+1] = ' ';
 172                 errormessages[len+2] = '\0';
 173         }
 174 }
 175
 176
 177 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 178 {
 179         struct ProtoFunctionHook *p;
 180
 181         p = (struct ProtoFunctionHook *)
 182                 malloc(sizeof(struct ProtoFunctionHook));
 183
 184         if (p == NULL) {
 185                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 186                 exit(EXIT_FAILURE);
 187         }
 188         p->handler = handler;
 189         p->cmd = cmd;
 190         p->desc = desc;
 191         p->next = ProtoHookList;
 192         ProtoHookList = p;
 193         lprintf(CTDL_INFO, "Registered server command %s (%s)\n", cmd, desc);
 194 }
 195
 196
 197 void CtdlUnregisterProtoHook(void (*handler) (char *), char *cmd)
 198 {
 199         struct ProtoFunctionHook *cur = NULL;
 200         struct ProtoFunctionHook *p = NULL;
 201         struct ProtoFunctionHook *lastcur = NULL;
 202
 203         for (cur = ProtoHookList;
 204              cur != NULL;
 205              cur = (cur != NULL)? cur->next: NULL) {
 206                 /* This will also remove duplicates if any */
 207                 while (cur != NULL &&
 208                                 handler == cur->handler &&
 209                                 !strcmp(cmd, cur->cmd)) {
 210                         lprintf(CTDL_INFO, "Unregistered server command %s (%s)\n",
 211                                         cmd, cur->desc);
 212                         p = cur->next;
 213                         if (cur == ProtoHookList) {
 214                                 ProtoHookList = p;
 215                         }
 216                         else if (lastcur != NULL)
 217                         {
 218                                 lastcur->next = p;
 219                         }
 220                         free(cur);
 221                         cur = p;
 222                 }
 223                 lastcur = cur;
 224         }
 225 }
 226
 227 void CtdlDestroyProtoHooks(void)
 228 {
 229         struct ProtoFunctionHook *cur, *p;
 230
 231         cur = ProtoHookList;
 232         while (cur != NULL)
 233         {
 234                 lprintf(CTDL_INFO, "Destroyed server command %s (%s)\n",
 235                         cur->cmd, cur->desc);
 236                 p = cur->next;
 237                 free(cur);
 238                 cur = p;
 239         }
 240         ProtoHookList = NULL;
 241 }
 242
 243
 244 int DLoader_Exec_Cmd(char *cmdbuf)
 245 {
 246         struct ProtoFunctionHook *p;
 247
 248         for (p = ProtoHookList; p; p = p->next) {
 249                 if (!strncasecmp(cmdbuf, p->cmd, 4)) {
 250                         p->handler(&cmdbuf[5]);
 251                         return 1;
 252                 }
 253         }
 254         return 0;
 255 }
 256
 257 #if 0
 258 void initialize_server_extensions(void)
 259 {
 260         long filter;
 261
 262         nSizErrmsg = 0;
 263
 264         /*lprintf(CTDL_INFO, "%s\n", serv_bio_init());
 265         lprintf(CTDL_INFO, "%s\n", serv_calendar_init());
 266         lprintf(CTDL_INFO, "%s\n", serv_notes_init());
 267         lprintf(CTDL_INFO, "%s\n", serv_ldap_init());
 268         lprintf(CTDL_INFO, "%s\n", serv_chat_init());
 269         lprintf(CTDL_INFO, "%s\n", serv_expire_init());
 270         lprintf(CTDL_INFO, "%s\n", serv_imap_init());
 271         lprintf(CTDL_INFO, "%s\n", serv_upgrade_init());
 272         lprintf(CTDL_INFO, "%s\n", serv_inetcfg_init());
 273         lprintf(CTDL_INFO, "%s\n", serv_listsub_init());
 274         lprintf(CTDL_INFO, "%s\n", serv_mrtg_init());
 275         lprintf(CTDL_INFO, "%s\n", serv_netfilter_init());
 276         lprintf(CTDL_INFO, "%s\n", serv_network_init());
 277         lprintf(CTDL_INFO, "%s\n", serv_newuser_init());
 278         lprintf(CTDL_INFO, "%s\n", serv_pas2_init());
 279         lprintf(CTDL_INFO, "%s\n", serv_smtp_init());
 280         lprintf(CTDL_INFO, "%s\n", serv_pop3_init());
 281         lprintf(CTDL_INFO, "%s\n", serv_rwho_init());
 282         lprintf(CTDL_INFO, "%s\n", serv_spam_init());*/
 283         /* lprintf(CTDL_INFO, "%s\n", serv_test_init()); */
 284         /*lprintf(CTDL_INFO, "%s\n", serv_vandelay_init());
 285         lprintf(CTDL_INFO, "%s\n", serv_vcard_init());
 286         lprintf(CTDL_INFO, "%s\n", serv_fulltext_init());
 287         lprintf(CTDL_INFO, "%s\n", serv_autocompletion_init());
 288         lprintf(CTDL_INFO, "%s\n", serv_postfix_tcpdict());
 289         lprintf(CTDL_INFO, "%s\n", serv_sieve_init());
 290         lprintf(CTDL_INFO, "%s\n", serv_managesieve_init());
 291         lprintf(CTDL_INFO, "%s\n", serv_funambol_init());*/
 292         for (filter = 1; filter != 0; filter = filter << 1)
 293                 if ((filter & DetailErrorFlags) != 0)
 294                         LogPrintMessages(filter);
 295 }
 296
 297 #endif
 298
 299 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 300 {
 301
 302         struct CleanupFunctionHook *newfcn;
 303
 304         newfcn = (struct CleanupFunctionHook *)
 305             malloc(sizeof(struct CleanupFunctionHook));
 306         newfcn->next = CleanupHookTable;
 307         newfcn->h_function_pointer = fcn_ptr;
 308         CleanupHookTable = newfcn;
 309
 310         lprintf(CTDL_INFO, "Registered a new cleanup function\n");
 311 }
 312
 313
 314 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 315 {
 316         struct CleanupFunctionHook *cur, *p;
 317
 318         for (cur = CleanupHookTable; cur != NULL; cur = cur->next) {
 319                 /* This will also remove duplicates if any */
 320                 while (cur != NULL &&
 321                                 fcn_ptr == cur->h_function_pointer) {
 322                         lprintf(CTDL_INFO, "Unregistered cleanup function\n");
 323                         p = cur->next;
 324                         if (cur == CleanupHookTable) {
 325                                 CleanupHookTable = p;
 326                         }
 327                         free(cur);
 328                         cur = p;
 329                 }
 330         }
 331 }
 332
 333 void CtdlDestroyCleanupHooks(void)
 334 {
 335         struct CleanupFunctionHook *cur, *p;
 336
 337         cur = CleanupHookTable;
 338         while (cur != NULL)
 339         {
 340                 lprintf(CTDL_INFO, "Destroyed cleanup function\n");
 341                 p = cur->next;
 342                 free(cur);
 343                 cur = p;
 344         }
 345         CleanupHookTable = NULL;
 346 }
 347
 348
 349 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType)
 350 {
 351
 352         struct SessionFunctionHook *newfcn;
 353
 354         newfcn = (struct SessionFunctionHook *)
 355             malloc(sizeof(struct SessionFunctionHook));
 356         newfcn->next = SessionHookTable;
 357         newfcn->h_function_pointer = fcn_ptr;
 358         newfcn->eventtype = EventType;
 359         SessionHookTable = newfcn;
 360
 361         lprintf(CTDL_INFO, "Registered a new session function (type %d)\n",
 362                 EventType);
 363 }
 364
 365
 366 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 367 {
 368         struct SessionFunctionHook *cur, *p;
 369
 370         for (cur = SessionHookTable; cur != NULL; cur = cur->next) {
 371                 /* This will also remove duplicates if any */
 372                 while (cur != NULL &&
 373                                 fcn_ptr == cur->h_function_pointer &&
 374                                 EventType == cur->eventtype) {
 375                         lprintf(CTDL_INFO, "Unregistered session function (type %d)\n",
 376                                         EventType);
 377                         p = cur->next;
 378                         if (cur == SessionHookTable) {
 379                                 SessionHookTable = p;
 380                         }
 381                         free(cur);
 382                         cur = p;
 383                 }
 384         }
 385 }
 386
 387 void CtdlDestroySessionHooks(void)
 388 {
 389         struct SessionFunctionHook *cur, *p;
 390
 391         cur = SessionHookTable;
 392         while (cur != NULL)
 393         {
 394                 lprintf(CTDL_INFO, "Destroyed session function\n");
 395                 p = cur->next;
 396                 free(cur);
 397                 cur = p;
 398         }
 399         SessionHookTable = NULL;
 400 }
 401
 402
 403 void CtdlRegisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 404 {
 405
 406         struct UserFunctionHook *newfcn;
 407
 408         newfcn = (struct UserFunctionHook *)
 409             malloc(sizeof(struct UserFunctionHook));
 410         newfcn->next = UserHookTable;
 411         newfcn->h_function_pointer = fcn_ptr;
 412         newfcn->eventtype = EventType;
 413         UserHookTable = newfcn;
 414
 415         lprintf(CTDL_INFO, "Registered a new user function (type %d)\n",
 416                 EventType);
 417 }
 418
 419
 420 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 421 {
 422         struct UserFunctionHook *cur, *p;
 423
 424         for (cur = UserHookTable; cur != NULL; cur = cur->next) {
 425                 /* This will also remove duplicates if any */
 426                 while (cur != NULL &&
 427                                 fcn_ptr == cur->h_function_pointer &&
 428                                 EventType == cur->eventtype) {
 429                         lprintf(CTDL_INFO, "Unregistered user function (type %d)\n",
 430                                         EventType);
 431                         p = cur->next;
 432                         if (cur == UserHookTable) {
 433                                 UserHookTable = p;
 434                         }
 435                         free(cur);
 436                         cur = p;
 437                 }
 438         }
 439 }
 440
 441 void CtdlDestroyUserHooks(void)
 442 {
 443         struct UserFunctionHook *cur, *p;
 444
 445         cur = UserHookTable;
 446         while (cur != NULL)
 447         {
 448                 lprintf(CTDL_INFO, "Destroyed user function \n");
 449                 p = cur->next;
 450                 free(cur);
 451                 cur = p;
 452         }
 453         UserHookTable = NULL;
 454 }
 455
 456
 457 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *),
 458                                 int EventType)
 459 {
 460
 461         struct MessageFunctionHook *newfcn;
 462
 463         newfcn = (struct MessageFunctionHook *)
 464             malloc(sizeof(struct MessageFunctionHook));
 465         newfcn->next = MessageHookTable;
 466         newfcn->h_function_pointer = handler;
 467         newfcn->eventtype = EventType;
 468         MessageHookTable = newfcn;
 469
 470         lprintf(CTDL_INFO, "Registered a new message function (type %d)\n",
 471                 EventType);
 472 }
 473
 474
 475 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *),
 476                 int EventType)
 477 {
 478         struct MessageFunctionHook *cur, *p;
 479
 480         for (cur = MessageHookTable; cur != NULL; cur = cur->next) {
 481                 /* This will also remove duplicates if any */
 482                 while (cur != NULL &&
 483                                 handler == cur->h_function_pointer &&
 484                                 EventType == cur->eventtype) {
 485                         lprintf(CTDL_INFO, "Unregistered message function (type %d)\n",
 486                                         EventType);
 487                         p = cur->next;
 488                         if (cur == MessageHookTable) {
 489                                 MessageHookTable = p;
 490                         }
 491                         free(cur);
 492                         cur = p;
 493                 }
 494         }
 495 }
 496
 497 void CtdlDestroyMessageHook(void)
 498 {
 499         struct MessageFunctionHook *cur, *p;
 500
 501         cur = MessageHookTable;
 502         while (cur != NULL)
 503         {
 504                 lprintf(CTDL_INFO, "Destroyed message function \n");
 505                 p = cur->next;
 506                 free(cur);
 507                 cur = p;
 508         }
 509         MessageHookTable = NULL;
 510 }
 511
 512
 513 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 514 {
 515         struct RoomFunctionHook *newfcn;
 516
 517         newfcn = (struct RoomFunctionHook *)
 518             malloc(sizeof(struct RoomFunctionHook));
 519         newfcn->next = RoomHookTable;
 520         newfcn->fcn_ptr = fcn_ptr;
 521         RoomHookTable = newfcn;
 522
 523         lprintf(CTDL_INFO, "Registered a new room function\n");
 524 }
 525
 526
 527 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 528 {
 529         struct RoomFunctionHook *cur, *p;
 530
 531         for (cur = RoomHookTable; cur != NULL; cur = cur->next) {
 532                 while (cur != NULL && fcn_ptr == cur->fcn_ptr) {
 533                         lprintf(CTDL_INFO, "Unregistered room function\n");
 534                         p = cur->next;
 535                         if (cur == RoomHookTable) {
 536                                 RoomHookTable = p;
 537                         }
 538                         free(cur);
 539                         cur = p;
 540                 }
 541         }
 542 }
 543
 544
 545 void CtdlDestroyRoomHooks(void)
 546 {
 547         struct RoomFunctionHook *cur, *p;
 548
 549         cur = RoomHookTable;
 550         while (cur != NULL)
 551         {
 552                 lprintf(CTDL_INFO, "Unregistered room function\n");
 553                 p = cur->next;
 554                 free(cur);
 555                 cur = p;
 556         }
 557         RoomHookTable = NULL;
 558 }
 559
 560 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 561 {
 562         struct NetprocFunctionHook *newfcn;
 563
 564         newfcn = (struct NetprocFunctionHook *)
 565             malloc(sizeof(struct NetprocFunctionHook));
 566         newfcn->next = NetprocHookTable;
 567         newfcn->h_function_pointer = handler;
 568         NetprocHookTable = newfcn;
 569
 570         lprintf(CTDL_INFO, "Registered a new netproc function\n");
 571 }
 572
 573
 574 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 575 {
 576         struct NetprocFunctionHook *cur, *p;
 577
 578         for (cur = NetprocHookTable; cur != NULL; cur = cur->next) {
 579                 /* This will also remove duplicates if any */
 580                 while (cur != NULL &&
 581                                 handler == cur->h_function_pointer ) {
 582                         lprintf(CTDL_INFO, "Unregistered netproc function\n");
 583                         p = cur->next;
 584                         if (cur == NetprocHookTable) {
 585                                 NetprocHookTable = p;
 586                         }
 587                         free(cur);
 588                         cur = p;
 589                 }
 590         }
 591 }
 592
 593 void CtdlDestroyNetprocHooks(void)
 594 {
 595         struct NetprocFunctionHook *cur, *p;
 596
 597         cur = NetprocHookTable;
 598         while (cur != NULL)
 599         {
 600                 lprintf(CTDL_INFO, "Unregistered netproc function\n");
 601                 p = cur->next;
 602                 free(cur);
 603                 cur = p;
 604         }
 605         NetprocHookTable = NULL;
 606 }
 607
 608
 609 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 610 {
 611         struct DeleteFunctionHook *newfcn;
 612
 613         newfcn = (struct DeleteFunctionHook *)
 614             malloc(sizeof(struct DeleteFunctionHook));
 615         newfcn->next = DeleteHookTable;
 616         newfcn->h_function_pointer = handler;
 617         DeleteHookTable = newfcn;
 618
 619         lprintf(CTDL_INFO, "Registered a new netproc function\n");
 620 }
 621
 622
 623 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 624 {
 625         struct DeleteFunctionHook *cur, *p;
 626
 627         for (cur = DeleteHookTable; cur != NULL; cur = cur->next) {
 628                 /* This will also remove duplicates if any */
 629                 while (cur != NULL &&
 630                                 handler == cur->h_function_pointer ) {
 631                         lprintf(CTDL_INFO, "Unregistered netproc function\n");
 632                         p = cur->next;
 633                         if (cur == DeleteHookTable) {
 634                                 DeleteHookTable = p;
 635                         }
 636                         free(cur);
 637                         cur = p;
 638                 }
 639         }
 640 }
 641 void CtdlDestroyDeleteHooks(void)
 642 {
 643         struct DeleteFunctionHook *cur, *p;
 644
 645         cur = DeleteHookTable;
 646         while (cur != NULL)
 647         {
 648                 lprintf(CTDL_INFO, "Destroyed netproc function\n");
 649                 p = cur->next;
 650                 free(cur);
 651                 cur = p;
 652         }
 653         DeleteHookTable = NULL;
 654 }
 655
 656
 657
 658
 659 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
 660 {
 661         struct FixedOutputHook *newfcn;
 662
 663         newfcn = (struct FixedOutputHook *)
 664             malloc(sizeof(struct FixedOutputHook));
 665         newfcn->next = FixedOutputTable;
 666         newfcn->h_function_pointer = handler;
 667         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
 668         FixedOutputTable = newfcn;
 669
 670         lprintf(CTDL_INFO, "Registered a new fixed output function for %s\n", newfcn->content_type);
 671 }
 672
 673
 674 void CtdlUnregisterFixedOutputHook(char *content_type)
 675 {
 676         struct FixedOutputHook *cur, *p;
 677
 678         for (cur = FixedOutputTable; cur != NULL; cur = cur->next) {
 679                 /* This will also remove duplicates if any */
 680                 while (cur != NULL && (!strcasecmp(content_type, cur->content_type))) {
 681                         lprintf(CTDL_INFO, "Unregistered fixed output function for %s\n", content_type);
 682                         p = cur->next;
 683                         if (cur == FixedOutputTable) {
 684                                 FixedOutputTable = p;
 685                         }
 686                         free(cur);
 687                         cur = p;
 688                 }
 689         }
 690 }
 691
 692 void CtdlDestroyFixedOutputHooks(void)
 693 {
 694         struct FixedOutputHook *cur, *p;
 695
 696         cur = FixedOutputTable;
 697         while (cur != NULL)
 698         {
 699                 lprintf(CTDL_INFO, "Destroyed fixed output function for %s\n", cur->content_type);
 700                 p = cur->next;
 701                 free(cur);
 702                 cur = p;
 703
 704         }
 705         FixedOutputTable = NULL;
 706 }
 707
 708 /* returns nonzero if we found a hook and used it */
 709 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
 710 {
 711         struct FixedOutputHook *fcn;
 712
 713         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
 714                 if (!strcasecmp(content_type, fcn->content_type)) {
 715                         (*fcn->h_function_pointer) (content, content_length);
 716                         return(1);
 717                 }
 718         }
 719         return(0);
 720 }
 721
 722
 723
 724
 725
 726 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *), int order)
 727 {
 728
 729         struct XmsgFunctionHook *newfcn;
 730
 731         newfcn = (struct XmsgFunctionHook *)
 732             malloc(sizeof(struct XmsgFunctionHook));
 733         newfcn->next = XmsgHookTable;
 734         newfcn->order = order;
 735         newfcn->h_function_pointer = fcn_ptr;
 736         XmsgHookTable = newfcn;
 737         lprintf(CTDL_INFO, "Registered a new x-msg function (priority %d)\n", order);
 738 }
 739
 740
 741 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *), int order)
 742 {
 743         struct XmsgFunctionHook *cur, *p;
 744
 745         for (cur = XmsgHookTable; cur != NULL; cur = cur->next) {
 746                 /* This will also remove duplicates if any */
 747                 while (cur != NULL &&
 748                                 fcn_ptr == cur->h_function_pointer &&
 749                                 order == cur->order) {
 750                         lprintf(CTDL_INFO, "Unregistered x-msg function "
 751                                         "(priority %d)\n", order);
 752                         p = cur->next;
 753                         if (cur == XmsgHookTable) {
 754                                 XmsgHookTable = p;
 755                         }
 756                         free(cur);
 757                         cur = p;
 758                 }
 759         }
 760 }
 761
 762 void CtdlDestroyXmsgHooks(void)
 763 {
 764         struct XmsgFunctionHook *cur, *p;
 765
 766         cur = XmsgHookTable;
 767         while (cur != NULL)
 768         {
 769                 lprintf(CTDL_INFO, "Destroyed x-msg function "
 770                         "(priority %d)\n", cur->order);
 771                 p = cur->next;
 772
 773                 free(cur);
 774                 cur = p;
 775         }
 776         XmsgHookTable = NULL;
 777 }
 778
 779
 780 void CtdlRegisterServiceHook(int tcp_port,
 781                              char *sockpath,
 782                              void (*h_greeting_function) (void),
 783                              void (*h_command_function) (void),
 784                              void (*h_async_function) (void),
 785                              const char *ServiceName)
 786 {
 787         struct ServiceFunctionHook *newfcn;
 788         char *message;
 789         char *error;
 790
 791         error = NULL;
 792         newfcn = (struct ServiceFunctionHook *)
 793             malloc(sizeof(struct ServiceFunctionHook));
 794         message = (char*) malloc (SIZ);
 795
 796         newfcn->next = ServiceHookTable;
 797         newfcn->tcp_port = tcp_port;
 798         newfcn->sockpath = sockpath;
 799         newfcn->h_greeting_function = h_greeting_function;
 800         newfcn->h_command_function = h_command_function;
 801         newfcn->h_async_function = h_async_function;
 802         newfcn->ServiceName = ServiceName;
 803
 804         if (sockpath != NULL) {
 805                 newfcn->msock = ig_uds_server(sockpath, config.c_maxsessions, &error);
 806                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
 807         }
 808         else if (tcp_port <= 0) {       /* port -1 to disable */
 809                 lprintf(CTDL_INFO, "Service %s has been manually disabled, skipping\n", ServiceName);
 810                 free (message);
 811                 free(newfcn);
 812                 return;
 813         }
 814         else {
 815                 newfcn->msock = ig_tcp_server(config.c_ip_addr,
 816                                               tcp_port,
 817                                               config.c_maxsessions,
 818                                               &error);
 819                 snprintf(message, SIZ, "TCP port %s:%d: (%s) ",
 820                          config.c_ip_addr, tcp_port, ServiceName);
 821         }
 822
 823         if (newfcn->msock > 0) {
 824                 ServiceHookTable = newfcn;
 825                 strcat(message, "registered.");
 826                 lprintf(CTDL_INFO, "%s\n", message);
 827         }
 828         else {
 829                 AddPortError(message, error);
 830                 strcat(message, "FAILED.");
 831                 lprintf(CTDL_CRIT, "%s\n", message);
 832                 free(error);
 833                 free(newfcn);
 834         }
 835         free(message);
 836 }
 837
 838
 839 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
 840                         void (*h_greeting_function) (void),
 841                         void (*h_command_function) (void),
 842                         void (*h_async_function) (void)
 843                         )
 844 {
 845         struct ServiceFunctionHook *cur, *p;
 846
 847         for (cur = ServiceHookTable; cur != NULL; cur = cur->next) {
 848                 /* This will also remove duplicates if any */
 849                 while (cur != NULL &&
 850                                 !(sockpath && cur->sockpath &&
 851                                         strcmp(sockpath, cur->sockpath)) &&
 852                                 h_greeting_function == cur->h_greeting_function &&
 853                                 h_command_function == cur->h_command_function &&
 854                                 h_async_function == cur->h_async_function &&
 855                                 tcp_port == cur->tcp_port) {
 856                         close(cur->msock);
 857                         if (sockpath) {
 858                                 lprintf(CTDL_INFO, "Closed UNIX domain socket %s\n",
 859                                                 sockpath);
 860                         } else if (tcp_port) {
 861                                 lprintf(CTDL_INFO, "Closed TCP port %d\n", tcp_port);
 862                         } else {
 863                                 lprintf(CTDL_INFO, "Unregistered unknown service\n");
 864                         }
 865                         p = cur->next;
 866                         if (cur == ServiceHookTable) {
 867                                 ServiceHookTable = p;
 868                         }
 869                         free(cur);
 870                         cur = p;
 871                 }
 872         }
 873 }
 874
 875 void CtdlDestroyServiceHook(void)
 876 {
 877         struct ServiceFunctionHook *cur, *p;
 878
 879         cur = ServiceHookTable;
 880         while (cur != NULL)
 881         {
 882                 close(cur->msock);
 883                 if (cur->sockpath) {
 884                         lprintf(CTDL_INFO, "Closed UNIX domain socket %s\n",
 885                                 cur->sockpath);
 886                 } else if (cur->tcp_port) {
 887                         lprintf(CTDL_INFO, "Closed TCP port %d\n", cur->tcp_port);
 888                 } else {
 889                         lprintf(CTDL_INFO, "Unregistered unknown service\n");
 890                 }
 891                 p = cur->next;
 892                 free(cur);
 893                 cur = p;
 894         }
 895         ServiceHookTable = NULL;
 896 }
 897
 898 void CtdlRegisterSearchFuncHook(void (*fcn_ptr)(int *, long **, char *), char *name)
 899 {
 900         struct SearchFunctionHook *newfcn;
 901
 902         if (!name || !fcn_ptr) {
 903                 return;
 904         }
 905
 906         newfcn = (struct SearchFunctionHook *)
 907             malloc(sizeof(struct SearchFunctionHook));
 908         newfcn->next = SearchFunctionHookTable;
 909         newfcn->name = name;
 910         newfcn->fcn_ptr = fcn_ptr;
 911         SearchFunctionHookTable = newfcn;
 912
 913         lprintf(CTDL_INFO, "Registered a new search function (%s)\n", name);
 914 }
 915
 916 void CtdlUnregisterSearchFuncHook(void (*fcn_ptr)(int *, long **, char *), char *name)
 917 {
 918         struct SearchFunctionHook *cur, *p;
 919
 920         for (cur = SearchFunctionHookTable; cur != NULL; cur = cur->next) {
 921                 while (fcn_ptr && (cur->fcn_ptr == fcn_ptr) && name && !strcmp(name, cur->name)) {
 922                         lprintf(CTDL_INFO, "Unregistered search function(%s)\n", name);
 923                         p = cur->next;
 924                         if (cur == SearchFunctionHookTable) {
 925                                 SearchFunctionHookTable = p;
 926                         }
 927                         free (cur);
 928                         cur = p;
 929                 }
 930         }
 931 }
 932
 933 void CtdlModuleDoSearch(int *num_msgs, long **search_msgs, char *search_string, char *func_name)
 934 {
 935         struct SearchFunctionHook *fcn = NULL;
 936
 937         for (fcn = SearchFunctionHookTable; fcn != NULL; fcn = fcn->next) {
 938                 if (!func_name || !strcmp(func_name, fcn->name)) {
 939                         (*fcn->fcn_ptr) (num_msgs, search_msgs, search_string);
 940                         return;
 941                 }
 942         }
 943         *num_msgs = 0;
 944 }
 945
 946
 947 void PerformSessionHooks(int EventType)
 948 {
 949         struct SessionFunctionHook *fcn = NULL;
 950
 951         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
 952                 if (fcn->eventtype == EventType) {
 953                         (*fcn->h_function_pointer) ();
 954                 }
 955         }
 956 }
 957
 958 void PerformUserHooks(struct ctdluser *usbuf, int EventType)
 959 {
 960         struct UserFunctionHook *fcn = NULL;
 961
 962         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
 963                 if (fcn->eventtype == EventType) {
 964                         (*fcn->h_function_pointer) (usbuf);
 965                 }
 966         }
 967 }
 968
 969 int PerformMessageHooks(struct CtdlMessage *msg, int EventType)
 970 {
 971         struct MessageFunctionHook *fcn = NULL;
 972         int total_retval = 0;
 973
 974         /* Other code may elect to protect this message from server-side
 975          * handlers; if this is the case, don't do anything.
 976         lprintf(CTDL_DEBUG, "** Event type is %d, flags are %d\n",
 977                 EventType, msg->cm_flags);
 978          */
 979         if (msg->cm_flags & CM_SKIP_HOOKS) {
 980                 lprintf(CTDL_DEBUG, "Skipping hooks\n");
 981                 return(0);
 982         }
 983
 984         /* Otherwise, run all the hooks appropriate to this event type.
 985          */
 986         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
 987                 if (fcn->eventtype == EventType) {
 988                         total_retval = total_retval +
 989                                 (*fcn->h_function_pointer) (msg);
 990                 }
 991         }
 992
 993         /* Return the sum of the return codes from the hook functions.  If
 994          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
 995          * the save operation to abort.
 996          */
 997         return total_retval;
 998 }
 999
1000
1001 int PerformRoomHooks(struct ctdlroom *target_room)
1002 {
1003         struct RoomFunctionHook *fcn;
1004         int total_retval = 0;
1005
1006         lprintf(CTDL_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
1007
1008         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
1009                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
1010         }
1011
1012         /* Return the sum of the return codes from the hook functions.
1013          */
1014         return total_retval;
1015 }
1016
1017
1018 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
1019 {
1020         struct NetprocFunctionHook *fcn;
1021         int total_retval = 0;
1022
1023         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
1024                 total_retval = total_retval +
1025                         (*fcn->h_function_pointer) (msg, target_room);
1026         }
1027
1028         /* Return the sum of the return codes from the hook functions.
1029          * A nonzero return code will cause the message to *not* be imported.
1030          */
1031         return total_retval;
1032 }
1033
1034
1035 void PerformDeleteHooks(char *room, long msgnum)
1036 {
1037         struct DeleteFunctionHook *fcn;
1038
1039         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
1040                 (*fcn->h_function_pointer) (room, msgnum);
1041         }
1042 }
1043
1044
1045
1046
1047
1048 int PerformXmsgHooks(char *sender, char *recp, char *msg)
1049 {
1050         struct XmsgFunctionHook *fcn;
1051         int total_sent = 0;
1052         int p;
1053
1054         for (p=0; p<MAX_XMSG_PRI; ++p) {
1055                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1056                         if (fcn->order == p) {
1057                                 total_sent +=
1058                                         (*fcn->h_function_pointer)
1059                                                 (sender, recp, msg);
1060                         }
1061                 }
1062                 /* Break out of the loop if a higher-priority function
1063                  * successfully delivered the message.  This prevents duplicate
1064                  * deliveries to local users simultaneously signed onto
1065                  * remote services.
1066                  */
1067                 if (total_sent) break;
1068         }
1069         return total_sent;
1070 }
1071
1072 void CtdlRegisterMaintenanceThread(char *name, void *(*thread_proc)(void *arg))
1073 {
1074         struct MaintenanceThreadHook *newfcn;
1075
1076         newfcn = (struct MaintenanceThreadHook *)
1077             malloc(sizeof(struct MaintenanceThreadHook));
1078         newfcn->name = name;
1079         newfcn->next = MaintenanceThreadHookTable;
1080         newfcn->fcn_ptr = thread_proc;
1081         MaintenanceThreadHookTable = newfcn;
1082
1083         lprintf(CTDL_INFO, "Registered a new maintenance thread function\n");
1084 }
1085
1086
1087 /*
1088  * Dirty hack until we impliment a hook mechanism for this
1089  */
1090 void CtdlModuleStartCryptoMsgs(char *ok_response, char *nosup_response, char *error_response)
1091 {
1092 #ifdef HAVE_OPENSSL
1093         CtdlStartTLS (ok_response, nosup_response, error_response);
1094 #endif
1095 }