citadel/serv_network.c

   1 /*
   2  * $Id$
   3  *
   4  * This module will eventually replace netproc and some of its utilities.  In
   5  * the meantime, it serves as a mailing list manager.
   6  *
   7  * Copyright (C) 2000-2001 by Art Cancro and others.
   8  * This code is released under the terms of the GNU General Public License.
   9  *
  10  */
  11
  12 #include "sysdep.h"
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <stdio.h>
  16 #include <fcntl.h>
  17 #include <signal.h>
  18 #include <pwd.h>
  19 #include <errno.h>
  20 #include <sys/types.h>
  21 #include <dirent.h>
  22 #if TIME_WITH_SYS_TIME
  23 # include <sys/time.h>
  24 # include <time.h>
  25 #else
  26 # if HAVE_SYS_TIME_H
  27 #  include <sys/time.h>
  28 # else
  29 #  include <time.h>
  30 # endif
  31 #endif
  32
  33 #include <sys/wait.h>
  34 #include <string.h>
  35 #include <limits.h>
  36 #include "citadel.h"
  37 #include "server.h"
  38 #include "sysdep_decls.h"
  39 #include "citserver.h"
  40 #include "support.h"
  41 #include "config.h"
  42 #include "dynloader.h"
  43 #include "room_ops.h"
  44 #include "user_ops.h"
  45 #include "policy.h"
  46 #include "database.h"
  47 #include "msgbase.h"
  48 #include "tools.h"
  49 #include "internet_addressing.h"
  50 #include "serv_network.h"
  51
  52
  53 /*
  54  * When we do network processing, it's accomplished in two passes; one to
  55  * gather a list of rooms and one to actually do them.  It's ok that rplist
  56  * is global; this process *only* runs as part of the housekeeping loop and
  57  * therefore only one will run at a time.
  58  */
  59 struct RoomProcList {
  60         struct RoomProcList *next;
  61         char name[ROOMNAMELEN];
  62 };
  63
  64 struct RoomProcList *rplist = NULL;
  65
  66
  67 /*
  68  * We build a map of the Citadel network during network runs.
  69  */
  70 struct NetMap {
  71         struct NetMap *next;
  72         char nodename[SIZ];
  73         time_t lastcontact;
  74         char nexthop[SIZ];
  75 };
  76
  77 struct NetMap *the_netmap = NULL;
  78
  79
  80
  81 /*
  82  * Read the network map from its configuration file into memory.
  83  */
  84 void read_network_map(void) {
  85         char *serialized_map = NULL;
  86         int i;
  87         char buf[SIZ];
  88         struct NetMap *nmptr;
  89
  90         serialized_map = CtdlGetSysConfig(IGNETMAP);
  91         if (serialized_map == NULL) return;     /* if null, no entries */
  92
  93         /* Use the string tokenizer to grab one line at a time */
  94         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
  95                 extract_token(buf, serialized_map, i, '\n');
  96                 nmptr = (struct NetMap *) mallok(sizeof(struct NetMap));
  97                 extract(nmptr->nodename, buf, 0);
  98                 nmptr->lastcontact = extract_long(buf, 1);
  99                 extract(nmptr->nexthop, buf, 2);
 100                 nmptr->next = the_netmap;
 101                 the_netmap = nmptr;
 102         }
 103
 104         phree(serialized_map);
 105 }
 106
 107
 108 /*
 109  * Write the network map from memory back to the configuration file.
 110  */
 111 void write_network_map(void) {
 112         char *serialized_map = NULL;
 113         struct NetMap *nmptr;
 114
 115         serialized_map = strdoop("");
 116
 117         if (the_netmap != NULL) {
 118                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 119                         serialized_map = reallok(serialized_map,
 120                                                 (strlen(serialized_map)+SIZ) );
 121                         if (strlen(nmptr->nodename) > 0) {
 122                                 sprintf(&serialized_map[strlen(serialized_map)],
 123                                         "%s|%ld|%s\n",
 124                                         nmptr->nodename,
 125                                         nmptr->lastcontact,
 126                                         nmptr->nexthop);
 127                         }
 128                 }
 129         }
 130
 131         CtdlPutSysConfig(IGNETMAP, serialized_map);
 132         phree(serialized_map);
 133
 134         /* Now free the list */
 135         while (the_netmap != NULL) {
 136                 nmptr = the_netmap->next;
 137                 phree(the_netmap);
 138                 the_netmap = nmptr;
 139         }
 140 }
 141
 142
 143
 144 /*
 145  * Check the network map and determine whether the supplied node name is
 146  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 147  * which is the next hop.
 148  */
 149 int is_valid_node(char *nexthop, char *node) {
 150         char *ignetcfg = NULL;
 151         int i;
 152         char linebuf[SIZ];
 153         char buf[SIZ];
 154         int retval;
 155         struct NetMap *nmptr;
 156
 157         if (node == NULL) {
 158                 return(-1);
 159         }
 160
 161         /*
 162          * First try the neighbor nodes
 163          */
 164         ignetcfg = CtdlGetSysConfig(IGNETCFG);
 165         if (ignetcfg == NULL) {
 166                 if (nexthop != NULL) {
 167                         strcpy(nexthop, "");
 168                 }
 169                 return(-1);
 170         }
 171
 172         retval = (-1);
 173         if (nexthop != NULL) {
 174                 strcpy(nexthop, "");
 175         }
 176
 177         /* Use the string tokenizer to grab one line at a time */
 178         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
 179                 extract_token(linebuf, ignetcfg, i, '\n');
 180                 extract(buf, linebuf, 0);
 181                 if (!strcasecmp(buf, node)) {
 182                         if (nexthop != NULL) {
 183                                 strcpy(nexthop, "");
 184                         }
 185                         retval = 0;
 186                 }
 187         }
 188
 189         phree(ignetcfg);
 190         if (retval == 0) {
 191                 return(retval);         /* yup, it's a direct neighbor */
 192         }
 193
 194         /*
 195          * If we get to this point we have to see if we know the next hop
 196          */
 197         if (the_netmap != NULL) {
 198                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 199                         if (!strcasecmp(nmptr->nodename, node)) {
 200                                 if (nexthop != NULL) {
 201                                         strcpy(nexthop, nmptr->nexthop);
 202                                 }
 203                                 return(0);
 204                         }
 205                 }
 206         }
 207
 208         /*
 209          * If we get to this point, the supplied node name is bogus.
 210          */
 211         lprintf(5, "Invalid node name <%s>\n", node);
 212         return(-1);
 213 }
 214
 215
 216
 217
 218
 219 void cmd_gnet(char *argbuf) {
 220         char filename[SIZ];
 221         char buf[SIZ];
 222         FILE *fp;
 223
 224         if (CtdlAccessCheck(ac_room_aide)) return;
 225         assoc_file_name(filename, &CC->quickroom, "netconfigs");
 226         cprintf("%d Network settings for room #%ld <%s>\n",
 227                 LISTING_FOLLOWS,
 228                 CC->quickroom.QRnumber, CC->quickroom.QRname);
 229
 230         fp = fopen(filename, "r");
 231         if (fp != NULL) {
 232                 while (fgets(buf, sizeof buf, fp) != NULL) {
 233                         buf[strlen(buf)-1] = 0;
 234                         cprintf("%s\n", buf);
 235                 }
 236                 fclose(fp);
 237         }
 238
 239         cprintf("000\n");
 240 }
 241
 242
 243 void cmd_snet(char *argbuf) {
 244         char tempfilename[SIZ];
 245         char filename[SIZ];
 246         char buf[SIZ];
 247         FILE *fp;
 248
 249         if (CtdlAccessCheck(ac_room_aide)) return;
 250         safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
 251         assoc_file_name(filename, &CC->quickroom, "netconfigs");
 252
 253         fp = fopen(tempfilename, "w");
 254         if (fp == NULL) {
 255                 cprintf("%d Cannot open %s: %s\n",
 256                         ERROR+INTERNAL_ERROR,
 257                         tempfilename,
 258                         strerror(errno));
 259         }
 260
 261         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 262         while (client_gets(buf), strcmp(buf, "000")) {
 263                 fprintf(fp, "%s\n", buf);
 264         }
 265         fclose(fp);
 266
 267         /* Now copy the temp file to its permanent location
 268          * (We use /bin/mv instead of link() because they may be on
 269          * different filesystems)
 270          */
 271         unlink(filename);
 272         snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
 273         system(buf);
 274 }
 275
 276
 277
 278 /*
 279  * Spools out one message from the list.
 280  */
 281 void network_spool_msg(long msgnum, void *userdata) {
 282         struct SpoolControl *sc;
 283         struct namelist *nptr;
 284         int err;
 285         int i;
 286         char *instr = NULL;
 287         char *newpath = NULL;
 288         size_t instr_len = SIZ;
 289         struct CtdlMessage *msg;
 290         struct CtdlMessage *imsg;
 291         struct ser_ret sermsg;
 292         FILE *fp;
 293         char filename[SIZ];
 294         char buf[SIZ];
 295         int bang = 0;
 296         int send = 1;
 297         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 298
 299         sc = (struct SpoolControl *)userdata;
 300
 301         /*
 302          * Process mailing list recipients
 303          */
 304         if (sc->listrecps != NULL) {
 305
 306                 /* First, copy it to the spoolout room */
 307                 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
 308                 if (err != 0) return;
 309
 310                 /*
 311                  * Figure out how big a buffer we need to allocate
 312                  */
 313                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 314                         instr_len = instr_len + strlen(nptr->name);
 315                 }
 316
 317                 /*
 318                  * allocate...
 319                  */
 320                 lprintf(9, "Generating delivery instructions\n");
 321                 instr = mallok(instr_len);
 322                 if (instr == NULL) {
 323                         lprintf(1, "Cannot allocate %d bytes for instr...\n",
 324                                 instr_len);
 325                         abort();
 326                 }
 327                 sprintf(instr,
 328                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 329                         "bounceto|postmaster@%s\n" ,
 330                         SPOOLMIME, msgnum, time(NULL), config.c_fqdn );
 331
 332                 /* Generate delivery instructions for each recipient */
 333                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 334                         sprintf(&instr[strlen(instr)], "remote|%s|0||\n",
 335                                 nptr->name);
 336                 }
 337
 338                 /*
 339                  * Generate a message from the instructions
 340                  */
 341                 imsg = mallok(sizeof(struct CtdlMessage));
 342                 memset(imsg, 0, sizeof(struct CtdlMessage));
 343                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
 344                 imsg->cm_anon_type = MES_NORMAL;
 345                 imsg->cm_format_type = FMT_RFC822;
 346                 imsg->cm_fields['A'] = strdoop("Citadel");
 347                 imsg->cm_fields['M'] = instr;
 348
 349                 /* Save delivery instructions in spoolout room */
 350                 CtdlSaveMsg(imsg, "", SMTP_SPOOLOUT_ROOM, MES_LOCAL);
 351                 CtdlFreeMessage(imsg);
 352         }
 353
 354         /*
 355          * Process IGnet push shares
 356          */
 357         if (sc->ignet_push_shares != NULL) {
 358
 359                 msg = CtdlFetchMessage(msgnum);
 360                 if (msg != NULL) {
 361
 362                         /* Prepend our node name to the Path field whenever
 363                          * sending a message to another IGnet node
 364                          */
 365                         if (msg->cm_fields['P'] == NULL) {
 366                                 msg->cm_fields['P'] = strdoop("username");
 367                         }
 368                         newpath = mallok(strlen(msg->cm_fields['P']) +
 369                                         strlen(config.c_nodename) + 2);
 370                         sprintf(newpath, "%s!%s", config.c_nodename,
 371                                         msg->cm_fields['P']);
 372                         phree(msg->cm_fields['P']);
 373                         msg->cm_fields['P'] = newpath;
 374
 375                         /*
 376                          * Force the message to appear in the correct room
 377                          * on the far end by setting the C field correctly
 378                          */
 379                         if (msg->cm_fields['C'] != NULL) {
 380                                 phree(msg->cm_fields['C']);
 381                         }
 382                         msg->cm_fields['C'] = strdoop(CC->quickroom.QRname);
 383
 384                         /*
 385                          * Determine if this message is set to be deleted
 386                          * after sending out on the network
 387                          */
 388                         if (msg->cm_fields['S'] != NULL) {
 389                                 if (!strcasecmp(msg->cm_fields['S'],
 390                                    "CANCEL")) {
 391                                         delete_after_send = 1;
 392                                 }
 393                         }
 394
 395                         /*
 396                          * Now serialize it for transmission
 397                          */
 398                         serialize_message(&sermsg, msg);
 399                         CtdlFreeMessage(msg);
 400
 401                         /* Now send it to every node */
 402                         for (nptr = sc->ignet_push_shares; nptr != NULL;
 403                             nptr = nptr->next) {
 404
 405                                 send = 1;
 406
 407                                 /* Check for valid node name */
 408                                 if (is_valid_node(NULL, nptr->name) != 0) {
 409                                         lprintf(3, "Invalid node <%s>\n",
 410                                                 nptr->name);
 411                                         send = 0;
 412                                 }
 413
 414                                 /* Check for split horizon */
 415                                 bang = num_tokens(msg->cm_fields['P'], '!');
 416                                 if (bang > 1) for (i=0; i<(bang-1); ++i) {
 417                                         extract_token(buf, msg->cm_fields['P'],
 418                                                 i, '!');
 419                                         if (!strcasecmp(buf, nptr->name)) {
 420                                                 send = 0;
 421                                         }
 422                                 }
 423
 424                                 /* Send the message */
 425                                 if (send == 1) {
 426                                         sprintf(filename,
 427                                                 "./network/spoolout/%s",
 428                                                 nptr->name);
 429                                         fp = fopen(filename, "ab");
 430                                         if (fp != NULL) {
 431                                                 fwrite(sermsg.ser,
 432                                                         sermsg.len, 1, fp);
 433                                                 fclose(fp);
 434                                         }
 435                                 }
 436                         }
 437                 }
 438         }
 439
 440         /* update lastsent */
 441         sc->lastsent = msgnum;
 442
 443         /* Delete this message if delete-after-send is set */
 444         if (delete_after_send) {
 445                 CtdlDeleteMessages(CC->quickroom.QRname, msgnum, "");
 446         }
 447
 448 }
 449
 450
 451
 452
 453 /*
 454  * Batch up and send all outbound traffic from the current room
 455  */
 456 void network_spoolout_room(char *room_to_spool) {
 457         char filename[SIZ];
 458         char buf[SIZ];
 459         char instr[SIZ];
 460         FILE *fp;
 461         struct SpoolControl sc;
 462         /* struct namelist *digestrecps = NULL; */
 463         struct namelist *nptr;
 464
 465         lprintf(7, "Spooling <%s>\n", room_to_spool);
 466         if (getroom(&CC->quickroom, room_to_spool) != 0) {
 467                 lprintf(1, "ERROR: cannot load <%s>\n", room_to_spool);
 468                 return;
 469         }
 470
 471         memset(&sc, 0, sizeof(struct SpoolControl));
 472         assoc_file_name(filename, &CC->quickroom, "netconfigs");
 473
 474         fp = fopen(filename, "r");
 475         if (fp == NULL) {
 476                 lprintf(7, "Outbound batch processing skipped for <%s>\n",
 477                         CC->quickroom.QRname);
 478                 return;
 479         }
 480
 481         lprintf(5, "Outbound batch processing started for <%s>\n",
 482                 CC->quickroom.QRname);
 483
 484         while (fgets(buf, sizeof buf, fp) != NULL) {
 485                 buf[strlen(buf)-1] = 0;
 486
 487                 extract(instr, buf, 0);
 488                 if (!strcasecmp(instr, "lastsent")) {
 489                         sc.lastsent = extract_long(buf, 1);
 490                 }
 491                 else if (!strcasecmp(instr, "listrecp")) {
 492                         nptr = (struct namelist *)
 493                                 mallok(sizeof(struct namelist));
 494                         nptr->next = sc.listrecps;
 495                         extract(nptr->name, buf, 1);
 496                         sc.listrecps = nptr;
 497                 }
 498                 else if (!strcasecmp(instr, "ignet_push_share")) {
 499                         nptr = (struct namelist *)
 500                                 mallok(sizeof(struct namelist));
 501                         nptr->next = sc.ignet_push_shares;
 502                         extract(nptr->name, buf, 1);
 503                         sc.ignet_push_shares = nptr;
 504                 }
 505
 506
 507         }
 508         fclose(fp);
 509
 510
 511         /* Do something useful */
 512         CtdlForEachMessage(MSGS_GT, sc.lastsent, (-63), NULL, NULL,
 513                 network_spool_msg, &sc);
 514
 515
 516         /* Now rewrite the config file */
 517         fp = fopen(filename, "w");
 518         if (fp == NULL) {
 519                 lprintf(1, "ERROR: cannot open %s: %s\n",
 520                         filename, strerror(errno));
 521         }
 522         else {
 523                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
 524
 525                 /* Write out the listrecps while freeing from memory at the
 526                  * same time.  Am I clever or what?  :)
 527                  */
 528                 while (sc.listrecps != NULL) {
 529                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
 530                         nptr = sc.listrecps->next;
 531                         phree(sc.listrecps);
 532                         sc.listrecps = nptr;
 533                 }
 534                 while (sc.ignet_push_shares != NULL) {
 535                         fprintf(fp, "ignet_push_share|%s\n",
 536                                 sc.ignet_push_shares->name);
 537                         nptr = sc.ignet_push_shares->next;
 538                         phree(sc.ignet_push_shares);
 539                         sc.ignet_push_shares = nptr;
 540                 }
 541
 542                 fclose(fp);
 543         }
 544
 545         lprintf(5, "Outbound batch processing finished for <%s>\n",
 546                 CC->quickroom.QRname);
 547 }
 548
 549
 550 /*
 551  * Batch up and send all outbound traffic from the current room
 552  */
 553 void network_queue_room(struct quickroom *qrbuf, void *data) {
 554         struct RoomProcList *ptr;
 555
 556         ptr = (struct RoomProcList *) mallok(sizeof (struct RoomProcList));
 557         if (ptr == NULL) return;
 558
 559         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
 560         ptr->next = rplist;
 561         rplist = ptr;
 562 }
 563
 564
 565 /*
 566  * Learn topology from path fields
 567  */
 568 void network_learn_topology(char *node, char *path) {
 569         char nexthop[SIZ];
 570         struct NetMap *nmptr;
 571
 572         strcpy(nexthop, "");
 573
 574         if (num_tokens(path, '!') < 3) return;
 575         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 576                 if (!strcasecmp(nmptr->nodename, node)) {
 577                         extract_token(nmptr->nexthop, path, 0, '!');
 578                         nmptr->lastcontact = time(NULL);
 579                         return;
 580                 }
 581         }
 582
 583         /* If we got here then it's not in the map, so add it. */
 584         nmptr = (struct NetMap *) mallok(sizeof (struct NetMap));
 585         strcpy(nmptr->nodename, node);
 586         nmptr->lastcontact = time(NULL);
 587         extract_token(nmptr->nexthop, path, 0, '!');
 588         nmptr->next = the_netmap;
 589         the_netmap = nmptr;
 590 }
 591
 592
 593
 594 /*
 595  * Process a buffer containing a single message from a single file
 596  * from the inbound queue
 597  */
 598 void network_process_buffer(char *buffer, long size) {
 599         struct CtdlMessage *msg;
 600         long pos;
 601         int field;
 602         int a;
 603         int e = MES_LOCAL;
 604         struct usersupp tempUS;
 605         char recp[SIZ];
 606         char target_room[ROOMNAMELEN];
 607
 608         /* Set default target room to trash */
 609         strcpy(target_room, TWITROOM);
 610
 611         /* Load the message into memory */
 612         msg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
 613         memset(msg, 0, sizeof(struct CtdlMessage));
 614         msg->cm_magic = CTDLMESSAGE_MAGIC;
 615         msg->cm_anon_type = buffer[1];
 616         msg->cm_format_type = buffer[2];
 617
 618         for (pos = 3; pos < size; ++pos) {
 619                 field = buffer[pos];
 620                 msg->cm_fields[field] = strdoop(&buffer[pos+1]);
 621                 pos = pos + strlen(&buffer[(int)pos]);
 622         }
 623
 624         /* Check for message routing */
 625         if (msg->cm_fields['D'] != NULL) {
 626                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 627
 628                         /* FIXME route the message, stupid */
 629
 630                 }
 631         }
 632
 633         /* FIXME check to see if we already have this message */
 634
 635         /* Learn network topology from the path */
 636         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
 637                 network_learn_topology(msg->cm_fields['N'],
 638                                         msg->cm_fields['P']);
 639         }
 640
 641         /* Does it have a recipient?  If so, validate it... */
 642         if (msg->cm_fields['R'] != NULL) {
 643
 644                 safestrncpy(recp, msg->cm_fields['R'], sizeof(recp));
 645
 646                 e = alias(recp);        /* alias and mail type */
 647                 if ((recp[0] == 0) || (e == MES_ERROR)) {
 648
 649                         /* FIXME bounce the msg */
 650
 651                 }
 652                 else if (e == MES_LOCAL) {
 653                         a = getuser(&tempUS, recp);
 654                         if (a != 0) {
 655                                 /* FIXME bounce the msg */
 656                         }
 657                         else {
 658                                 MailboxName(target_room, &tempUS, MAILROOM);
 659                         }
 660                 }
 661         }
 662
 663         else if (msg->cm_fields['C'] != NULL) {
 664                 safestrncpy(target_room,
 665                         msg->cm_fields['C'],
 666                         sizeof target_room);
 667         }
 668
 669         else if (msg->cm_fields['O'] != NULL) {
 670                 safestrncpy(target_room,
 671                         msg->cm_fields['O'],
 672                         sizeof target_room);
 673         }
 674
 675         /* save the message into a room */
 676         msg->cm_flags = CM_SKIP_HOOKS;
 677         CtdlSaveMsg(msg, "", target_room, 0);
 678         CtdlFreeMessage(msg);
 679 }
 680
 681
 682 /*
 683  * Process a single message from a single file from the inbound queue
 684  */
 685 void network_process_message(FILE *fp, long msgstart, long msgend) {
 686         long hold_pos;
 687         long size;
 688         char *buffer;
 689
 690         hold_pos = ftell(fp);
 691         size = msgend - msgstart + 1;
 692         buffer = mallok(size);
 693         if (buffer != NULL) {
 694                 fseek(fp, msgstart, SEEK_SET);
 695                 fread(buffer, size, 1, fp);
 696                 network_process_buffer(buffer, size);
 697                 phree(buffer);
 698         }
 699
 700         fseek(fp, hold_pos, SEEK_SET);
 701 }
 702
 703
 704 /*
 705  * Process a single file from the inbound queue
 706  */
 707 void network_process_file(char *filename) {
 708         FILE *fp;
 709         long msgstart = (-1L);
 710         long msgend = (-1L);
 711         long msgcur = 0L;
 712         int ch;
 713
 714         lprintf(7, "network: processing <%s>\n", filename);
 715
 716         fp = fopen(filename, "rb");
 717         if (fp == NULL) {
 718                 lprintf(5, "Error opening %s: %s\n",
 719                         filename, strerror(errno));
 720                 return;
 721         }
 722
 723         /* Look for messages in the data stream and break them out */
 724         while (ch = getc(fp), ch >= 0) {
 725
 726                 if (ch == 255) {
 727                         if (msgstart >= 0L) {
 728                                 msgend = msgcur - 1;
 729                                 network_process_message(fp, msgstart, msgend);
 730                         }
 731                         msgstart = msgcur;
 732                 }
 733
 734                 ++msgcur;
 735         }
 736
 737         msgend = msgcur - 1;
 738         if (msgstart >= 0L) {
 739                 network_process_message(fp, msgstart, msgend);
 740         }
 741
 742         fclose(fp);
 743         unlink(filename);
 744 }
 745
 746
 747 /*
 748  * Process anything in the inbound queue
 749  */
 750 void network_do_spoolin(void) {
 751         DIR *dp;
 752         struct dirent *d;
 753         char filename[SIZ];
 754
 755         dp = opendir("./network/spoolin");
 756         if (dp == NULL) return;
 757
 758         while (d = readdir(dp), d != NULL) {
 759                 sprintf(filename, "./network/spoolin/%s", d->d_name);
 760                 network_process_file(filename);
 761         }
 762
 763
 764         closedir(dp);
 765 }
 766
 767
 768 /*
 769  * network_do_queue()
 770  *
 771  * Run through the rooms doing various types of network stuff.
 772  */
 773 void network_do_queue(void) {
 774         static int doing_queue = 0;
 775         static time_t last_run = 0L;
 776         struct RoomProcList *ptr;
 777
 778         /*
 779          * Run no more frequently than once every n seconds
 780          */
 781         if ( (time(NULL) - last_run) < NETWORK_QUEUE_FREQUENCY ) return;
 782
 783         /*
 784          * This is a simple concurrency check to make sure only one queue run
 785          * is done at a time.  We could do this with a mutex, but since we
 786          * don't really require extremely fine granularity here, we'll do it
 787          * with a static variable instead.
 788          */
 789         if (doing_queue) return;
 790         doing_queue = 1;
 791         last_run = time(NULL);
 792
 793         read_network_map();
 794
 795         /*
 796          * Go ahead and run the queue
 797          */
 798         lprintf(7, "network: loading outbound queue\n");
 799         ForEachRoom(network_queue_room, NULL);
 800
 801         lprintf(7, "network: running outbound queue\n");
 802         while (rplist != NULL) {
 803                 network_spoolout_room(rplist->name);
 804                 ptr = rplist;
 805                 rplist = rplist->next;
 806                 phree(ptr);
 807         }
 808
 809         lprintf(7, "network: processing inbound queue\n");
 810         network_do_spoolin();
 811
 812         write_network_map();
 813
 814         lprintf(7, "network: queue run completed\n");
 815         doing_queue = 0;
 816 }
 817
 818
 819 /*
 820  * Module entry point
 821  */
 822 char *Dynamic_Module_Init(void)
 823 {
 824         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
 825         CtdlRegisterProtoHook(cmd_snet, "SNET", "Get network config");
 826         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
 827         return "$Id$";
 828 }