citadel/modules/network/serv_network.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2012 by the citadel.org team
   6  *
   7  *  This program is open source software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License, version 3.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  16  * This is a fairly high-level type of critical section.  It ensures that no
  17  * two threads work on the netconfigs files at the same time.  Since we do
  18  * so many things inside these, here are the rules:
  19  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  20  *  2. Do *not* perform any I/O with the client during these sections.
  21  *
  22  */
  23
  24 /*
  25  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  26  * requests that have not been confirmed will be deleted.
  27  */
  28 #define EXP     259200  /* three days */
  29
  30 #include "sysdep.h"
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <fcntl.h>
  35 #include <ctype.h>
  36 #include <signal.h>
  37 #include <pwd.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <dirent.h>
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52 #ifdef HAVE_SYSCALL_H
  53 # include <syscall.h>
  54 #else
  55 # if HAVE_SYS_SYSCALL_H
  56 #  include <sys/syscall.h>
  57 # endif
  58 #endif
  59
  60 #include <sys/wait.h>
  61 #include <string.h>
  62 #include <limits.h>
  63 #include <libcitadel.h>
  64 #include "citadel.h"
  65 #include "server.h"
  66 #include "citserver.h"
  67 #include "support.h"
  68 #include "config.h"
  69 #include "user_ops.h"
  70 #include "database.h"
  71 #include "msgbase.h"
  72 #include "internet_addressing.h"
  73 #include "serv_network.h"
  74 #include "clientsocket.h"
  75 #include "file_ops.h"
  76 #include "citadel_dirs.h"
  77 #include "threads.h"
  78 #include "context.h"
  79 #include "ctdl_module.h"
  80 #include "netspool.h"
  81 #include "netmail.h"
  82
  83 int NetQDebugEnabled = 0;
  84 struct CitContext networker_spool_CC;
  85
  86 /* comes from lookup3.c from libcitadel... */
  87 extern uint32_t hashlittle( const void *key, size_t length, uint32_t initval);
  88
  89 typedef struct __roomlists {
  90         RoomProcList *rplist;
  91 }roomlists;
  92 /*
  93  * When we do network processing, it's accomplished in two passes; one to
  94  * gather a list of rooms and one to actually do them.  It's ok that rplist
  95  * is global; we have a mutex that keeps it safe.
  96  */
  97 struct RoomProcList *rplist = NULL;
  98
  99
 100
 101 /*
 102  * Check the use table.  This is a list of messages which have recently
 103  * arrived on the system.  It is maintained and queried to prevent the same
 104  * message from being entered into the database multiple times if it happens
 105  * to arrive multiple times by accident.
 106  */
 107 int network_usetable(struct CtdlMessage *msg)
 108 {
 109         struct CitContext *CCC = CC;
 110         char msgid[SIZ];
 111         struct cdbdata *cdbut;
 112         struct UseTable ut;
 113
 114         /* Bail out if we can't generate a message ID */
 115         if (msg == NULL) {
 116                 return(0);
 117         }
 118         if (msg->cm_fields['I'] == NULL) {
 119                 return(0);
 120         }
 121         if (IsEmptyStr(msg->cm_fields['I'])) {
 122                 return(0);
 123         }
 124
 125         /* Generate the message ID */
 126         strcpy(msgid, msg->cm_fields['I']);
 127         if (haschar(msgid, '@') == 0) {
 128                 strcat(msgid, "@");
 129                 if (msg->cm_fields['N'] != NULL) {
 130                         strcat(msgid, msg->cm_fields['N']);
 131                 }
 132                 else {
 133                         return(0);
 134                 }
 135         }
 136
 137         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 138         if (cdbut != NULL) {
 139                 cdb_free(cdbut);
 140                 QN_syslog(LOG_DEBUG, "network_usetable() : we already have %s\n", msgid);
 141                 return(1);
 142         }
 143
 144         /* If we got to this point, it's unique: add it. */
 145         strcpy(ut.ut_msgid, msgid);
 146         ut.ut_timestamp = time(NULL);
 147         cdb_store(CDB_USETABLE, msgid, strlen(msgid), &ut, sizeof(struct UseTable) );
 148         return(0);
 149 }
 150
 151
 152 void CalcListID(SpoolControl *sc)
 153 {
 154         const char *err;
 155         int fd;
 156         struct CitContext *CCC = CC;
 157         char filename[PATH_MAX];
 158 #define MAX_LISTIDLENGTH 150
 159
 160         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 161         fd = open(filename, 0);
 162
 163         if (fd != 0) {
 164                 struct stat stbuf;
 165
 166                 fstat(fd, &stbuf);
 167                 if (stbuf.st_size > 0)
 168                 {
 169                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 170                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 171                 }
 172                 close(fd);
 173         }
 174
 175         sc->ListID = NewStrBufPlain(NULL, 1024);
 176         if (StrLength(sc->RoomInfo) > 0)
 177         {
 178                 const char *Pos = NULL;
 179                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 180
 181                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 182                 {
 183                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 184                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 185                 }
 186                 StrBufAsciify(sc->ListID, ' ');
 187         }
 188         else
 189         {
 190                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 191         }
 192
 193         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 194
 195         if (StrLength(sc->Users[roommailalias]) > 0)
 196         {
 197                 long Pos;
 198                 const char *AtPos;
 199
 200                 Pos = StrLength(sc->ListID);
 201                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 202                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 203
 204                 if (AtPos != NULL)
 205                 {
 206                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 207                 }
 208         }
 209         else
 210         {
 211                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 212                 StrBufAppendBufPlain(sc->ListID, sc->room.QRname, -1, 0);
 213                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 214                 StrBufAppendBufPlain(sc->ListID, config.c_fqdn, -1, 0);
 215                 /*
 216                  * this used to be:
 217                  * roomname <Room-Number.list-id.fqdn>
 218                  * according to rfc2919.txt it only has to be a uniq identifier
 219                  * under the domain of the system;
 220                  * in general MUAs use it to calculate the reply address nowadays.
 221                  */
 222         }
 223         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 224
 225         if (StrLength(sc->Users[roommailalias]) == 0)
 226         {
 227                 sc->Users[roommailalias] = NewStrBuf();
 228
 229                 StrBufPrintf(sc->Users[roommailalias],
 230                              "room_%s@%s",
 231                              CCC->room.QRname,
 232                              config.c_fqdn);
 233
 234                 StrBufAsciify(sc->Users[roommailalias], '_');
 235                 StrBufLowerCase(sc->Users[roommailalias]);
 236         }
 237
 238 }
 239
 240 /*
 241  * Send the *entire* contents of the current room to one specific network node,
 242  * ignoring anything we know about which messages have already undergone
 243  * network processing.  This can be used to bring a new node into sync.
 244  */
 245 int network_sync_to(char *target_node, long len)
 246 {
 247         struct CitContext *CCC = CC;
 248         OneRoomNetCfg OneRNCFG;
 249         OneRoomNetCfg *pRNCFG;
 250         const RoomNetCfgLine *pCfgLine;
 251         SpoolControl sc;
 252         int num_spooled = 0;
 253
 254         /* Grab the configuration line we're looking for */
 255         begin_critical_section(S_NETCONFIGS);
 256         pRNCFG = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 257         if ((pRNCFG == NULL) ||
 258             (pRNCFG->NetConfigs[ignet_push_share] == NULL))
 259         {
 260                 return -1;
 261         }
 262
 263         pCfgLine = pRNCFG->NetConfigs[ignet_push_share];
 264         while (pCfgLine != NULL)
 265         {
 266                 if (strcmp(ChrPtr(pCfgLine->Value[0]), target_node))
 267                         break;
 268                 pCfgLine = pCfgLine->next;
 269         }
 270         if (pCfgLine == NULL)
 271         {
 272                 return -1;
 273         }
 274         memset(&sc, 0, sizeof(SpoolControl));
 275         memset(&OneRNCFG, 0, sizeof(OneRoomNetCfg));
 276         sc.RNCfg = &OneRNCFG;
 277         sc.RNCfg->NetConfigs[ignet_push_share] = DuplicateOneGenericCfgLine(pCfgLine);
 278
 279         end_critical_section(S_NETCONFIGS);
 280
 281         sc.working_ignetcfg = CtdlLoadIgNetCfg();
 282         sc.the_netmap = CtdlReadNetworkMap();
 283
 284         CalcListID(&sc);
 285         /* Send ALL messages */
 286         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
 287                 network_spool_msg, &sc);
 288
 289         /* Concise cleanup because we know there's only one node in the sc */
 290         DeleteGenericCfgLine(NULL/*TODO*/, &sc.RNCfg->NetConfigs[ignet_push_share]);
 291
 292         DeleteHash(&sc.working_ignetcfg);
 293         DeleteHash(&sc.the_netmap);
 294
 295         QN_syslog(LOG_NOTICE, "Synchronized %d messages to <%s>\n",
 296                   num_spooled, target_node);
 297         return(num_spooled);
 298 }
 299
 300
 301 /*
 302  * Implements the NSYN command
 303  */
 304 void cmd_nsyn(char *argbuf) {
 305         int num_spooled;
 306         long len;
 307         char target_node[256];
 308
 309         if (CtdlAccessCheck(ac_aide)) return;
 310
 311         len = extract_token(target_node, argbuf, 0, '|', sizeof target_node);
 312         num_spooled = network_sync_to(target_node, len);
 313         if (num_spooled >= 0) {
 314                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
 315         }
 316         else {
 317                 cprintf("%d No such room/node share exists.\n",
 318                         ERROR + ROOM_NOT_FOUND);
 319         }
 320 }
 321
 322 RoomProcList *CreateRoomProcListEntry(struct ctdlroom *qrbuf, OneRoomNetCfg *OneRNCFG)
 323 {
 324         int i;
 325         struct RoomProcList *ptr;
 326
 327         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
 328         if (ptr == NULL) return NULL;
 329
 330         ptr->namelen = strlen(qrbuf->QRname);
 331         if (ptr->namelen > ROOMNAMELEN)
 332                 ptr->namelen = ROOMNAMELEN - 1;
 333
 334         memcpy (ptr->name, qrbuf->QRname, ptr->namelen);
 335         ptr->name[ptr->namelen] = '\0';
 336         ptr->QRNum = qrbuf->QRnumber;
 337
 338         for (i = 0; i < ptr->namelen; i++)
 339         {
 340                 ptr->lcname[i] = tolower(ptr->name[i]);
 341         }
 342
 343         ptr->lcname[ptr->namelen] = '\0';
 344         ptr->key = hashlittle(ptr->lcname, ptr->namelen, 9872345);
 345         ptr->lastsent = OneRNCFG->lastsent;
 346         ptr->OneRNCfg = OneRNCFG;
 347         return ptr;
 348 }
 349
 350 /*
 351  * Batch up and send all outbound traffic from the current room
 352  */
 353 void network_queue_interesting_rooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 354 {
 355         struct RoomProcList *ptr;
 356         roomlists *RP = (roomlists*) data;
 357
 358         if (!HaveSpoolConfig(OneRNCfg))
 359                 return;
 360
 361         ptr = CreateRoomProcListEntry(qrbuf, OneRNCfg);
 362
 363         if (ptr != NULL)
 364         {
 365                 ptr->next = RP->rplist;
 366                 RP->rplist = ptr;
 367         }
 368 }
 369
 370 /*
 371  * Batch up and send all outbound traffic from the current room
 372  */
 373 int network_room_handler (struct ctdlroom *qrbuf)
 374 {
 375         struct RoomProcList *ptr;
 376         OneRoomNetCfg* RNCfg;
 377
 378         if (qrbuf->QRdefaultview == VIEW_QUEUE)
 379                 return 1;
 380
 381         RNCfg = CtdlGetNetCfgForRoom(qrbuf->QRnumber);
 382         if (RNCfg == NULL)
 383                 return 1;
 384
 385         if (!HaveSpoolConfig(RNCfg))
 386                 return 1;
 387
 388         ptr = CreateRoomProcListEntry(qrbuf, RNCfg);
 389         if (ptr == NULL)
 390                 return 1;
 391
 392         ptr->OneRNCfg = NULL;
 393         begin_critical_section(S_RPLIST);
 394         ptr->next = rplist;
 395         rplist = ptr;
 396         end_critical_section(S_RPLIST);
 397         return 1;
 398 }
 399
 400 void destroy_network_queue_room(RoomProcList *rplist)
 401 {
 402         struct RoomProcList *cur, *p;
 403
 404         cur = rplist;
 405         while (cur != NULL)
 406         {
 407                 p = cur->next;
 408                 free (cur);
 409                 cur = p;
 410         }
 411 }
 412
 413 void destroy_network_queue_room_locked (void)
 414 {
 415         begin_critical_section(S_RPLIST);
 416         destroy_network_queue_room(rplist);
 417         end_critical_section(S_RPLIST);
 418 }
 419
 420
 421
 422 /*
 423  * Bounce a message back to the sender
 424  */
 425 void network_bounce(struct CtdlMessage *msg, char *reason)
 426 {
 427         struct CitContext *CCC = CC;
 428         char *oldpath = NULL;
 429         char buf[SIZ];
 430         char bouncesource[SIZ];
 431         char recipient[SIZ];
 432         struct recptypes *valid = NULL;
 433         char force_room[ROOMNAMELEN];
 434         static int serialnum = 0;
 435         size_t size;
 436
 437         QNM_syslog(LOG_DEBUG, "entering network_bounce()\n");
 438
 439         if (msg == NULL) return;
 440
 441         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
 442
 443         /*
 444          * Give it a fresh message ID
 445          */
 446         if (msg->cm_fields['I'] != NULL) {
 447                 free(msg->cm_fields['I']);
 448         }
 449         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
 450                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
 451         msg->cm_fields['I'] = strdup(buf);
 452
 453         /*
 454          * FIXME ... right now we're just sending a bounce; we really want to
 455          * include the text of the bounced message.
 456          */
 457         if (msg->cm_fields['M'] != NULL) {
 458                 free(msg->cm_fields['M']);
 459         }
 460         msg->cm_fields['M'] = strdup(reason);
 461         msg->cm_format_type = 0;
 462
 463         /*
 464          * Turn the message around
 465          */
 466         if (msg->cm_fields['R'] == NULL) {
 467                 free(msg->cm_fields['R']);
 468         }
 469
 470         if (msg->cm_fields['D'] == NULL) {
 471                 free(msg->cm_fields['D']);
 472         }
 473
 474         snprintf(recipient, sizeof recipient, "%s@%s",
 475                 msg->cm_fields['A'], msg->cm_fields['N']);
 476
 477         if (msg->cm_fields['A'] == NULL) {
 478                 free(msg->cm_fields['A']);
 479         }
 480
 481         if (msg->cm_fields['N'] == NULL) {
 482                 free(msg->cm_fields['N']);
 483         }
 484
 485         if (msg->cm_fields['U'] == NULL) {
 486                 free(msg->cm_fields['U']);
 487         }
 488
 489         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
 490         msg->cm_fields['N'] = strdup(config.c_nodename);
 491         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
 492
 493         /* prepend our node to the path */
 494         if (msg->cm_fields['P'] != NULL) {
 495                 oldpath = msg->cm_fields['P'];
 496                 msg->cm_fields['P'] = NULL;
 497         }
 498         else {
 499                 oldpath = strdup("unknown_user");
 500         }
 501         size = strlen(oldpath) + SIZ;
 502         msg->cm_fields['P'] = malloc(size);
 503         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
 504         free(oldpath);
 505
 506         /* Now submit the message */
 507         valid = validate_recipients(recipient, NULL, 0);
 508         if (valid != NULL) if (valid->num_error != 0) {
 509                 free_recipients(valid);
 510                 valid = NULL;
 511         }
 512         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 513                 strcpy(force_room, config.c_aideroom);
 514         }
 515         else {
 516                 strcpy(force_room, "");
 517         }
 518         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
 519                 strcpy(force_room, config.c_aideroom);
 520         }
 521         CtdlSubmitMsg(msg, valid, force_room, 0);
 522
 523         /* Clean up */
 524         if (valid != NULL) free_recipients(valid);
 525         CtdlFreeMessage(msg);
 526         QNM_syslog(LOG_DEBUG, "leaving network_bounce()\n");
 527 }
 528
 529
 530 void free_network_spoolout_room(SpoolControl *sc)
 531 {
 532         if (sc != NULL)
 533         {
 534                 int i;
 535                 for (i = subpending; i < maxRoomNetCfg; i++)
 536                         FreeStrBuf(&sc->Users[i]);
 537                 free(sc);
 538         }
 539 }
 540
 541
 542
 543
 544 /*
 545  * network_do_queue()
 546  *
 547  * Run through the rooms doing various types of network stuff.
 548  */
 549 void network_do_queue(void)
 550 {
 551         struct CitContext *CCC = CC;
 552         static time_t last_run = 0L;
 553         int full_processing = 1;
 554         HashList *working_ignetcfg;
 555         HashList *the_netmap = NULL;
 556         int netmap_changed = 0;
 557         roomlists RL;
 558         SpoolControl *sc = NULL;
 559         SpoolControl *pSC;
 560
 561         /*
 562          * Run the full set of processing tasks no more frequently
 563          * than once every n seconds
 564          */
 565         if ( (time(NULL) - last_run) < config.c_net_freq ) {
 566                 full_processing = 0;
 567                 syslog(LOG_DEBUG, "Network full processing in %ld seconds.\n",
 568                        config.c_net_freq - (time(NULL)- last_run)
 569                 );
 570         }
 571
 572         become_session(&networker_spool_CC);
 573         begin_critical_section(S_RPLIST);
 574         RL.rplist = rplist;
 575         rplist = NULL;
 576         end_critical_section(S_RPLIST);
 577 ///TODO hm, check whether we have a config at all here?
 578         /* Load the IGnet Configuration into memory */
 579         working_ignetcfg = CtdlLoadIgNetCfg();
 580
 581         /*
 582          * Load the network map and filter list into memory.
 583          */
 584         if (!server_shutting_down)
 585                 the_netmap = CtdlReadNetworkMap();
 586 #if 0
 587         /* filterlist isn't supported anymore
 588         if (!server_shutting_down)
 589                 load_network_filter_list();
 590         */
 591 #endif
 592
 593         /*
 594          * Go ahead and run the queue
 595          */
 596         if (full_processing && !server_shutting_down) {
 597                 QNM_syslog(LOG_DEBUG, "network: loading outbound queue");
 598                 CtdlForEachNetCfgRoom(network_queue_interesting_rooms, &RL, maxRoomNetCfg);
 599         }
 600
 601         if ((RL.rplist != NULL) && (!server_shutting_down)) {
 602                 RoomProcList *ptr, *cmp;
 603                 ptr = RL.rplist;
 604                 QNM_syslog(LOG_DEBUG, "network: running outbound queue");
 605                 while (ptr != NULL && !server_shutting_down) {
 606
 607                         cmp = ptr->next;
 608                         /* filter duplicates from the list... */
 609                         while (cmp != NULL) {
 610                                 if ((cmp->namelen > 0) &&
 611                                     (cmp->key == ptr->key) &&
 612                                     (cmp->namelen == ptr->namelen) &&
 613                                     (strcmp(cmp->lcname, ptr->lcname) == 0))
 614                                 {
 615                                         cmp->namelen = 0;
 616                                 }
 617                                 cmp = cmp->next;
 618                         }
 619
 620                         if (ptr->namelen > 0) {
 621                                 InspectQueuedRoom(&sc,
 622                                                   ptr,
 623                                                   working_ignetcfg,
 624                                                   the_netmap);
 625                         }
 626                         ptr = ptr->next;
 627                 }
 628         }
 629
 630
 631         pSC = sc;
 632         while (pSC != NULL)
 633         {
 634                 network_spoolout_room(pSC);
 635                 pSC = pSC->next;
 636         }
 637
 638         pSC = sc;
 639         while (pSC != NULL)
 640         {
 641                 sc = pSC->next;
 642                 free_network_spoolout_room(pSC);
 643                 pSC = sc;
 644         }
 645         /* If there is anything in the inbound queue, process it */
 646         if (!server_shutting_down) {
 647                 network_do_spoolin(working_ignetcfg,
 648                                    the_netmap,
 649                                    &netmap_changed);
 650         }
 651
 652         /* Free the filter list in memory */
 653         free_netfilter_list();
 654
 655         /* Save the network map back to disk */
 656         if (netmap_changed) {
 657                 StrBuf *MapStr = CtdlSerializeNetworkMap(the_netmap);
 658                 char *pMapStr = SmashStrBuf(&MapStr);
 659                 CtdlPutSysConfig(IGNETMAP, pMapStr);
 660                 free(pMapStr);
 661         }
 662
 663         /* combine singe message files into one spool entry per remote node. */
 664         network_consolidate_spoolout(working_ignetcfg, the_netmap);
 665
 666         /* shut down. */
 667
 668         DeleteHash(&the_netmap);
 669
 670         DeleteHash(&working_ignetcfg);
 671
 672         QNM_syslog(LOG_DEBUG, "network: queue run completed");
 673
 674         if (full_processing) {
 675                 last_run = time(NULL);
 676         }
 677         destroy_network_queue_room(RL.rplist);
 678         SaveChangedConfigs();
 679
 680 }
 681
 682
 683
 684
 685
 686
 687
 688
 689 void network_logout_hook(void)
 690 {
 691         CitContext *CCC = MyContext();
 692
 693         /*
 694          * If we were talking to a network node, we're not anymore...
 695          */
 696         if (!IsEmptyStr(CCC->net_node)) {
 697                 CtdlNetworkTalkingTo(CCC->net_node, strlen(CCC->net_node), NTT_REMOVE);
 698                 CCC->net_node[0] = '\0';
 699         }
 700 }
 701 void network_cleanup_function(void)
 702 {
 703         struct CitContext *CCC = CC;
 704
 705         if (!IsEmptyStr(CCC->net_node)) {
 706                 CtdlNetworkTalkingTo(CCC->net_node, strlen(CCC->net_node), NTT_REMOVE);
 707                 CCC->net_node[0] = '\0';
 708         }
 709 }
 710
 711
 712 /*
 713  * Module entry point
 714  */
 715
 716 void SetNetQDebugEnabled(const int n)
 717 {
 718         NetQDebugEnabled = n;
 719 }
 720
 721 CTDL_MODULE_INIT(network)
 722 {
 723         if (!threading)
 724         {
 725                 CtdlFillSystemContext(&networker_spool_CC, "CitNetSpool");
 726                 CtdlRegisterDebugFlagHook(HKEY("networkqueue"), SetNetQDebugEnabled, &NetQDebugEnabled);
 727                 CtdlRegisterSessionHook(network_cleanup_function, EVT_STOP, PRIO_STOP + 30);
 728                 CtdlRegisterSessionHook(network_logout_hook, EVT_LOGOUT, PRIO_LOGOUT + 10);
 729                 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
 730                 CtdlRegisterRoomHook(network_room_handler);
 731                 CtdlRegisterCleanupHook(destroy_network_queue_room_locked);
 732                 CtdlRegisterSessionHook(network_do_queue, EVT_TIMER, PRIO_QUEUE + 10);
 733         }
 734         return "network";
 735 }