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