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