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