citadel/serv_network.c

   1 /*
   2  * $Id$
   3  *
   4  * This module handles shared rooms, inter-Citadel mail, and outbound
   5  * mailing list processing.
   6  *
   7  * Copyright (C) 2000-2005 by Art Cancro and others.
   8  * This code is released under the terms of the GNU General Public License.
   9  *
  10  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  11  * This is a fairly high-level type of critical section.  It ensures that no
  12  * two threads work on the netconfigs files at the same time.  Since we do
  13  * so many things inside these, here are the rules:
  14  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  15  *  2. Do *not* perform any I/O with the client during these sections.
  16  *
  17  */
  18
  19 /*
  20  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  21  * requests that have not been confirmed will be deleted.
  22  */
  23 #define EXP     259200  /* three days */
  24
  25 #include "sysdep.h"
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28 #include <stdio.h>
  29 #include <fcntl.h>
  30 #include <ctype.h>
  31 #include <signal.h>
  32 #include <pwd.h>
  33 #include <errno.h>
  34 #include <sys/stat.h>
  35 #include <sys/types.h>
  36 #include <dirent.h>
  37 #if TIME_WITH_SYS_TIME
  38 # include <sys/time.h>
  39 # include <time.h>
  40 #else
  41 # if HAVE_SYS_TIME_H
  42 #  include <sys/time.h>
  43 # else
  44 #  include <time.h>
  45 # endif
  46 #endif
  47
  48 #include <sys/wait.h>
  49 #include <string.h>
  50 #include <limits.h>
  51 #include "citadel.h"
  52 #include "server.h"
  53 #include "citserver.h"
  54 #include "support.h"
  55 #include "config.h"
  56 #include "room_ops.h"
  57 #include "user_ops.h"
  58 #include "policy.h"
  59 #include "database.h"
  60 #include "msgbase.h"
  61 #include "tools.h"
  62 #include "internet_addressing.h"
  63 #include "serv_network.h"
  64 #include "clientsocket.h"
  65 #include "file_ops.h"
  66 #include "citadel_dirs.h"
  67
  68 #ifndef HAVE_SNPRINTF
  69 #include "snprintf.h"
  70 #endif
  71
  72
  73 #include "ctdl_module.h"
  74
  75
  76
  77 /* Nonzero while we are doing network processing */
  78 static int doing_queue = 0;
  79
  80 /*
  81  * When we do network processing, it's accomplished in two passes; one to
  82  * gather a list of rooms and one to actually do them.  It's ok that rplist
  83  * is global; we have a mutex that keeps it safe.
  84  */
  85 struct RoomProcList *rplist = NULL;
  86
  87 /*
  88  * We build a map of network nodes during processing.
  89  */
  90 struct NetMap *the_netmap = NULL;
  91 int netmap_changed = 0;
  92 char *working_ignetcfg = NULL;
  93
  94 /*
  95  * Load or refresh the Citadel network (IGnet) configuration for this node.
  96  */
  97 void load_working_ignetcfg(void) {
  98         char *cfg;
  99         char *oldcfg;
 100
 101         cfg = CtdlGetSysConfig(IGNETCFG);
 102         if (cfg == NULL) {
 103                 cfg = strdup("");
 104         }
 105
 106         oldcfg = working_ignetcfg;
 107         working_ignetcfg = cfg;
 108         if (oldcfg != NULL) {
 109                 free(oldcfg);
 110         }
 111 }
 112
 113
 114
 115
 116
 117 /*
 118  * Keep track of what messages to reject
 119  */
 120 struct FilterList *load_filter_list(void) {
 121         char *serialized_list = NULL;
 122         int i;
 123         char buf[SIZ];
 124         struct FilterList *newlist = NULL;
 125         struct FilterList *nptr;
 126
 127         serialized_list = CtdlGetSysConfig(FILTERLIST);
 128         if (serialized_list == NULL) return(NULL); /* if null, no entries */
 129
 130         /* Use the string tokenizer to grab one line at a time */
 131         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
 132                 extract_token(buf, serialized_list, i, '\n', sizeof buf);
 133                 nptr = (struct FilterList *) malloc(sizeof(struct FilterList));
 134                 extract_token(nptr->fl_user, buf, 0, '|', sizeof nptr->fl_user);
 135                 striplt(nptr->fl_user);
 136                 extract_token(nptr->fl_room, buf, 1, '|', sizeof nptr->fl_room);
 137                 striplt(nptr->fl_room);
 138                 extract_token(nptr->fl_node, buf, 2, '|', sizeof nptr->fl_node);
 139                 striplt(nptr->fl_node);
 140
 141                 /* Cowardly refuse to add an any/any/any entry that would
 142                  * end up filtering every single message.
 143                  */
 144                 if (strlen(nptr->fl_user) + strlen(nptr->fl_room)
 145                    + strlen(nptr->fl_node) == 0) {
 146                         free(nptr);
 147                 }
 148                 else {
 149                         nptr->next = newlist;
 150                         newlist = nptr;
 151                 }
 152         }
 153
 154         free(serialized_list);
 155         return newlist;
 156 }
 157
 158
 159 void free_filter_list(struct FilterList *fl) {
 160         if (fl == NULL) return;
 161         free_filter_list(fl->next);
 162         free(fl);
 163 }
 164
 165
 166
 167 /*
 168  * Check the use table.  This is a list of messages which have recently
 169  * arrived on the system.  It is maintained and queried to prevent the same
 170  * message from being entered into the database multiple times if it happens
 171  * to arrive multiple times by accident.
 172  */
 173 int network_usetable(struct CtdlMessage *msg) {
 174
 175         char msgid[SIZ];
 176         struct cdbdata *cdbut;
 177         struct UseTable ut;
 178
 179         /* Bail out if we can't generate a message ID */
 180         if (msg == NULL) {
 181                 return(0);
 182         }
 183         if (msg->cm_fields['I'] == NULL) {
 184                 return(0);
 185         }
 186         if (strlen(msg->cm_fields['I']) == 0) {
 187                 return(0);
 188         }
 189
 190         /* Generate the message ID */
 191         strcpy(msgid, msg->cm_fields['I']);
 192         if (haschar(msgid, '@') == 0) {
 193                 strcat(msgid, "@");
 194                 if (msg->cm_fields['N'] != NULL) {
 195                         strcat(msgid, msg->cm_fields['N']);
 196                 }
 197                 else {
 198                         return(0);
 199                 }
 200         }
 201
 202         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 203         if (cdbut != NULL) {
 204                 cdb_free(cdbut);
 205                 return(1);
 206         }
 207
 208         /* If we got to this point, it's unique: add it. */
 209         strcpy(ut.ut_msgid, msgid);
 210         ut.ut_timestamp = time(NULL);
 211         cdb_store(CDB_USETABLE, msgid, strlen(msgid),
 212                 &ut, sizeof(struct UseTable) );
 213         return(0);
 214 }
 215
 216
 217 /*
 218  * Read the network map from its configuration file into memory.
 219  */
 220 void read_network_map(void) {
 221         char *serialized_map = NULL;
 222         int i;
 223         char buf[SIZ];
 224         struct NetMap *nmptr;
 225
 226         serialized_map = CtdlGetSysConfig(IGNETMAP);
 227         if (serialized_map == NULL) return;     /* if null, no entries */
 228
 229         /* Use the string tokenizer to grab one line at a time */
 230         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 231                 extract_token(buf, serialized_map, i, '\n', sizeof buf);
 232                 nmptr = (struct NetMap *) malloc(sizeof(struct NetMap));
 233                 extract_token(nmptr->nodename, buf, 0, '|', sizeof nmptr->nodename);
 234                 nmptr->lastcontact = extract_long(buf, 1);
 235                 extract_token(nmptr->nexthop, buf, 2, '|', sizeof nmptr->nexthop);
 236                 nmptr->next = the_netmap;
 237                 the_netmap = nmptr;
 238         }
 239
 240         free(serialized_map);
 241         netmap_changed = 0;
 242 }
 243
 244
 245 /*
 246  * Write the network map from memory back to the configuration file.
 247  */
 248 void write_network_map(void) {
 249         char *serialized_map = NULL;
 250         struct NetMap *nmptr;
 251
 252
 253         if (netmap_changed) {
 254                 serialized_map = strdup("");
 255
 256                 if (the_netmap != NULL) {
 257                         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 258                                 serialized_map = realloc(serialized_map,
 259                                                         (strlen(serialized_map)+SIZ) );
 260                                 if (strlen(nmptr->nodename) > 0) {
 261                                         snprintf(&serialized_map[strlen(serialized_map)],
 262                                                 SIZ,
 263                                                 "%s|%ld|%s\n",
 264                                                 nmptr->nodename,
 265                                                 (long)nmptr->lastcontact,
 266                                                 nmptr->nexthop);
 267                                 }
 268                         }
 269                 }
 270
 271                 CtdlPutSysConfig(IGNETMAP, serialized_map);
 272                 free(serialized_map);
 273         }
 274
 275         /* Now free the list */
 276         while (the_netmap != NULL) {
 277                 nmptr = the_netmap->next;
 278                 free(the_netmap);
 279                 the_netmap = nmptr;
 280         }
 281         netmap_changed = 0;
 282 }
 283
 284
 285
 286 /*
 287  * Check the network map and determine whether the supplied node name is
 288  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 289  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 290  * shared secret.
 291  */
 292 int is_valid_node(char *nexthop, char *secret, char *node) {
 293         int i;
 294         char linebuf[SIZ];
 295         char buf[SIZ];
 296         int retval;
 297         struct NetMap *nmptr;
 298
 299         if (node == NULL) {
 300                 return(-1);
 301         }
 302
 303         /*
 304          * First try the neighbor nodes
 305          */
 306         if (working_ignetcfg == NULL) {
 307                 lprintf(CTDL_ERR, "working_ignetcfg is NULL!\n");
 308                 if (nexthop != NULL) {
 309                         strcpy(nexthop, "");
 310                 }
 311                 return(-1);
 312         }
 313
 314         retval = (-1);
 315         if (nexthop != NULL) {
 316                 strcpy(nexthop, "");
 317         }
 318
 319         /* Use the string tokenizer to grab one line at a time */
 320         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
 321                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
 322                 extract_token(buf, linebuf, 0, '|', sizeof buf);
 323                 if (!strcasecmp(buf, node)) {
 324                         if (nexthop != NULL) {
 325                                 strcpy(nexthop, "");
 326                         }
 327                         if (secret != NULL) {
 328                                 extract_token(secret, linebuf, 1, '|', 256);
 329                         }
 330                         retval = 0;
 331                 }
 332         }
 333
 334         if (retval == 0) {
 335                 return(retval);         /* yup, it's a direct neighbor */
 336         }
 337
 338         /*
 339          * If we get to this point we have to see if we know the next hop
 340          */
 341         if (the_netmap != NULL) {
 342                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 343                         if (!strcasecmp(nmptr->nodename, node)) {
 344                                 if (nexthop != NULL) {
 345                                         strcpy(nexthop, nmptr->nexthop);
 346                                 }
 347                                 return(0);
 348                         }
 349                 }
 350         }
 351
 352         /*
 353          * If we get to this point, the supplied node name is bogus.
 354          */
 355         lprintf(CTDL_ERR, "Invalid node name <%s>\n", node);
 356         return(-1);
 357 }
 358
 359
 360
 361
 362
 363 void cmd_gnet(char *argbuf) {
 364         char filename[SIZ];
 365         char buf[SIZ];
 366         FILE *fp;
 367
 368         if (CtdlAccessCheck(ac_room_aide)) return;
 369         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 370         cprintf("%d Network settings for room #%ld <%s>\n",
 371                 LISTING_FOLLOWS,
 372                 CC->room.QRnumber, CC->room.QRname);
 373
 374         fp = fopen(filename, "r");
 375         if (fp != NULL) {
 376                 while (fgets(buf, sizeof buf, fp) != NULL) {
 377                         buf[strlen(buf)-1] = 0;
 378                         cprintf("%s\n", buf);
 379                 }
 380                 fclose(fp);
 381         }
 382
 383         cprintf("000\n");
 384 }
 385
 386
 387 void cmd_snet(char *argbuf) {
 388         char tempfilename[SIZ];
 389         char filename[SIZ];
 390         char buf[SIZ];
 391         FILE *fp;
 392
 393         unbuffer_output();
 394
 395         if (CtdlAccessCheck(ac_room_aide)) return;
 396         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
 397         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 398
 399         fp = fopen(tempfilename, "w");
 400         if (fp == NULL) {
 401                 cprintf("%d Cannot open %s: %s\n",
 402                         ERROR + INTERNAL_ERROR,
 403                         tempfilename,
 404                         strerror(errno));
 405         }
 406
 407         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 408         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 409                 fprintf(fp, "%s\n", buf);
 410         }
 411         fclose(fp);
 412
 413         /* Now copy the temp file to its permanent location
 414          * (We use /bin/mv instead of link() because they may be on
 415          * different filesystems)
 416          */
 417         unlink(filename);
 418         snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
 419         begin_critical_section(S_NETCONFIGS);
 420         system(buf);
 421         end_critical_section(S_NETCONFIGS);
 422 }
 423
 424
 425 /*
 426  * Deliver digest messages
 427  */
 428 void network_deliver_digest(struct SpoolControl *sc) {
 429         char buf[SIZ];
 430         int i;
 431         struct CtdlMessage *msg = NULL;
 432         long msglen;
 433         char *recps = NULL;
 434         size_t recps_len = SIZ;
 435         struct recptypes *valid;
 436         struct namelist *nptr;
 437
 438         if (sc->num_msgs_spooled < 1) {
 439                 fclose(sc->digestfp);
 440                 sc->digestfp = NULL;
 441                 return;
 442         }
 443
 444         msg = malloc(sizeof(struct CtdlMessage));
 445         memset(msg, 0, sizeof(struct CtdlMessage));
 446         msg->cm_magic = CTDLMESSAGE_MAGIC;
 447         msg->cm_format_type = FMT_RFC822;
 448         msg->cm_anon_type = MES_NORMAL;
 449
 450         sprintf(buf, "%ld", time(NULL));
 451         msg->cm_fields['T'] = strdup(buf);
 452         msg->cm_fields['A'] = strdup(CC->room.QRname);
 453         snprintf(buf, sizeof buf, "[%s]", CC->room.QRname);
 454         msg->cm_fields['U'] = strdup(buf);
 455         sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
 456         for (i=0; i<strlen(buf); ++i) {
 457                 if (isspace(buf[i])) buf[i]='_';
 458                 buf[i] = tolower(buf[i]);
 459         }
 460         msg->cm_fields['F'] = strdup(buf);
 461         msg->cm_fields['R'] = strdup(buf);
 462
 463         /*
 464          * Go fetch the contents of the digest
 465          */
 466         fseek(sc->digestfp, 0L, SEEK_END);
 467         msglen = ftell(sc->digestfp);
 468
 469         msg->cm_fields['M'] = malloc(msglen + 1);
 470         fseek(sc->digestfp, 0L, SEEK_SET);
 471         fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 472         msg->cm_fields['M'][msglen] = 0;
 473
 474         fclose(sc->digestfp);
 475         sc->digestfp = NULL;
 476
 477         /* Now generate the delivery instructions */
 478
 479         /*
 480          * Figure out how big a buffer we need to allocate
 481          */
 482         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 483                 recps_len = recps_len + strlen(nptr->name) + 2;
 484         }
 485
 486         recps = malloc(recps_len);
 487
 488         if (recps == NULL) {
 489                 lprintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 490                 abort();
 491         }
 492
 493         strcpy(recps, "");
 494
 495         /* Each recipient */
 496         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 497                 if (nptr != sc->digestrecps) {
 498                         strcat(recps, ",");
 499                 }
 500                 strcat(recps, nptr->name);
 501         }
 502
 503         /* Now submit the message */
 504         valid = validate_recipients(recps);
 505         free(recps);
 506         CtdlSubmitMsg(msg, valid, NULL);
 507         CtdlFreeMessage(msg);
 508         free_recipients(valid);
 509 }
 510
 511
 512 /*
 513  * Deliver list messages to everyone on the list ... efficiently
 514  */
 515 void network_deliver_list(struct CtdlMessage *msg, struct SpoolControl *sc) {
 516         char *recps = NULL;
 517         size_t recps_len = SIZ;
 518         struct recptypes *valid;
 519         struct namelist *nptr;
 520
 521         /* Don't do this if there were no recipients! */
 522         if (sc->listrecps == NULL) return;
 523
 524         /* Now generate the delivery instructions */
 525
 526         /*
 527          * Figure out how big a buffer we need to allocate
 528          */
 529         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 530                 recps_len = recps_len + strlen(nptr->name) + 2;
 531         }
 532
 533         recps = malloc(recps_len);
 534
 535         if (recps == NULL) {
 536                 lprintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 537                 abort();
 538         }
 539
 540         strcpy(recps, "");
 541
 542         /* Each recipient */
 543         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 544                 if (nptr != sc->listrecps) {
 545                         strcat(recps, ",");
 546                 }
 547                 strcat(recps, nptr->name);
 548         }
 549
 550         /* Now submit the message */
 551         valid = validate_recipients(recps);
 552         free(recps);
 553         CtdlSubmitMsg(msg, valid, NULL);
 554         free_recipients(valid);
 555         /* Do not call CtdlFreeMessage(msg) here; the caller will free it. */
 556 }
 557
 558
 559
 560
 561 /*
 562  * Spools out one message from the list.
 563  */
 564 void network_spool_msg(long msgnum, void *userdata) {
 565         struct SpoolControl *sc;
 566         int i;
 567         char *newpath = NULL;
 568         size_t instr_len = SIZ;
 569         struct CtdlMessage *msg = NULL;
 570         struct namelist *nptr;
 571         struct maplist *mptr;
 572         struct ser_ret sermsg;
 573         FILE *fp;
 574         char filename[SIZ];
 575         char buf[SIZ];
 576         int bang = 0;
 577         int send = 1;
 578         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 579         int ok_to_participate = 0;
 580         struct recptypes *valid;
 581
 582         sc = (struct SpoolControl *)userdata;
 583
 584         /*
 585          * Process mailing list recipients
 586          */
 587         instr_len = SIZ;
 588         if (sc->listrecps != NULL) {
 589                 /* Fetch the message.  We're going to need to modify it
 590                  * in order to insert the [list name] in it, etc.
 591                  */
 592                 msg = CtdlFetchMessage(msgnum, 1);
 593                 if (msg != NULL) {
 594
 595                         /* Prepend "[List name]" to the subject */
 596                         if (msg->cm_fields['U'] == NULL) {
 597                                 msg->cm_fields['U'] = strdup("(no subject)");
 598                         }
 599                         snprintf(buf, sizeof buf, "[%s] %s", CC->room.QRname, msg->cm_fields['U']);
 600                         free(msg->cm_fields['U']);
 601                         msg->cm_fields['U'] = strdup(buf);
 602
 603                         /* Set the recipient of the list message to the
 604                          * email address of the room itself.
 605                          * FIXME ... I want to be able to pick any address
 606                          */
 607                         if (msg->cm_fields['R'] != NULL) {
 608                                 free(msg->cm_fields['R']);
 609                         }
 610                         msg->cm_fields['R'] = malloc(256);
 611                         snprintf(msg->cm_fields['R'], 256,
 612                                 "room_%s@%s", CC->room.QRname,
 613                                 config.c_fqdn);
 614                         for (i=0; i<strlen(msg->cm_fields['R']); ++i) {
 615                                 if (isspace(msg->cm_fields['R'][i])) {
 616                                         msg->cm_fields['R'][i] = '_';
 617                                 }
 618                         }
 619
 620                         /* Handle delivery */
 621                         network_deliver_list(msg, sc);
 622                         CtdlFreeMessage(msg);
 623                 }
 624         }
 625
 626         /*
 627          * Process digest recipients
 628          */
 629         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 630                 msg = CtdlFetchMessage(msgnum, 1);
 631                 if (msg != NULL) {
 632                         fprintf(sc->digestfp,   " -----------------------------------"
 633                                                 "------------------------------------"
 634                                                 "-------\n");
 635                         fprintf(sc->digestfp, "From: ");
 636                         if (msg->cm_fields['A'] != NULL) {
 637                                 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
 638                         }
 639                         if (msg->cm_fields['F'] != NULL) {
 640                                 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
 641                         }
 642                         else if (msg->cm_fields['N'] != NULL) {
 643                                 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
 644                         }
 645                         fprintf(sc->digestfp, "\n");
 646                         if (msg->cm_fields['U'] != NULL) {
 647                                 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
 648                         }
 649
 650                         CC->redirect_buffer = malloc(SIZ);
 651                         CC->redirect_len = 0;
 652                         CC->redirect_alloc = SIZ;
 653
 654                         safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
 655                         CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0);
 656
 657                         striplt(CC->redirect_buffer);
 658                         fprintf(sc->digestfp, "\n%s\n", CC->redirect_buffer);
 659
 660                         free(CC->redirect_buffer);
 661                         CC->redirect_buffer = NULL;
 662                         CC->redirect_len = 0;
 663                         CC->redirect_alloc = 0;
 664
 665                         sc->num_msgs_spooled += 1;
 666                         free(msg);
 667                 }
 668         }
 669
 670         /*
 671          * Process client-side list participations for this room
 672          */
 673         instr_len = SIZ;
 674         if (sc->participates != NULL) {
 675                 msg = CtdlFetchMessage(msgnum, 1);
 676                 if (msg != NULL) {
 677
 678                         /* Only send messages which originated on our own Citadel
 679                          * network, otherwise we'll end up sending the remote
 680                          * mailing list's messages back to it, which is rude...
 681                          */
 682                         ok_to_participate = 0;
 683                         if (msg->cm_fields['N'] != NULL) {
 684                                 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
 685                                         ok_to_participate = 1;
 686                                 }
 687                                 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
 688                                         ok_to_participate = 1;
 689                                 }
 690                         }
 691                         if (ok_to_participate) {
 692                                 if (msg->cm_fields['F'] != NULL) {
 693                                         free(msg->cm_fields['F']);
 694                                 }
 695                                 msg->cm_fields['F'] = malloc(SIZ);
 696                                 /* Replace the Internet email address of the actual
 697                                 * author with the email address of the room itself,
 698                                 * so the remote listserv doesn't reject us.
 699                                 * FIXME ... I want to be able to pick any address
 700                                 */
 701                                 snprintf(msg->cm_fields['F'], SIZ,
 702                                         "room_%s@%s", CC->room.QRname,
 703                                         config.c_fqdn);
 704                                 for (i=0; i<strlen(msg->cm_fields['F']); ++i) {
 705                                         if (isspace(msg->cm_fields['F'][i])) {
 706                                                 msg->cm_fields['F'][i] = '_';
 707                                         }
 708                                 }
 709
 710                                 /*
 711                                  * Figure out how big a buffer we need to allocate
 712                                  */
 713                                 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
 714
 715                                         if (msg->cm_fields['R'] == NULL) {
 716                                                 free(msg->cm_fields['R']);
 717                                         }
 718                                         msg->cm_fields['R'] = strdup(nptr->name);
 719
 720                                         valid = validate_recipients(nptr->name);
 721                                         CtdlSubmitMsg(msg, valid, "");
 722                                         free_recipients(valid);
 723                                 }
 724
 725                         }
 726                         CtdlFreeMessage(msg);
 727                 }
 728         }
 729
 730         /*
 731          * Process IGnet push shares
 732          */
 733         msg = CtdlFetchMessage(msgnum, 1);
 734         if (msg != NULL) {
 735                 size_t newpath_len;
 736
 737                 /* Prepend our node name to the Path field whenever
 738                  * sending a message to another IGnet node
 739                  */
 740                 if (msg->cm_fields['P'] == NULL) {
 741                         msg->cm_fields['P'] = strdup("username");
 742                 }
 743                 newpath_len = strlen(msg->cm_fields['P']) +
 744                          strlen(config.c_nodename) + 2;
 745                 newpath = malloc(newpath_len);
 746                 snprintf(newpath, newpath_len, "%s!%s",
 747                          config.c_nodename, msg->cm_fields['P']);
 748                 free(msg->cm_fields['P']);
 749                 msg->cm_fields['P'] = newpath;
 750
 751                 /*
 752                  * Determine if this message is set to be deleted
 753                  * after sending out on the network
 754                  */
 755                 if (msg->cm_fields['S'] != NULL) {
 756                         if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
 757                                 delete_after_send = 1;
 758                         }
 759                 }
 760
 761                 /* Now send it to every node */
 762                 if (sc->ignet_push_shares != NULL)
 763                   for (mptr = sc->ignet_push_shares; mptr != NULL;
 764                     mptr = mptr->next) {
 765
 766                         send = 1;
 767
 768                         /* Check for valid node name */
 769                         if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
 770                                 lprintf(CTDL_ERR, "Invalid node <%s>\n",
 771                                         mptr->remote_nodename);
 772                                 send = 0;
 773                         }
 774
 775                         /* Check for split horizon */
 776                         lprintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
 777                         bang = num_tokens(msg->cm_fields['P'], '!');
 778                         if (bang > 1) for (i=0; i<(bang-1); ++i) {
 779                                 extract_token(buf, msg->cm_fields['P'],
 780                                         i, '!', sizeof buf);
 781                                 if (!strcasecmp(buf, mptr->remote_nodename)) {
 782                                         send = 0;
 783                                 }
 784                         }
 785
 786                         /* Send the message */
 787                         if (send == 1) {
 788
 789                                 /*
 790                                  * Force the message to appear in the correct room
 791                                  * on the far end by setting the C field correctly
 792                                  */
 793                                 if (msg->cm_fields['C'] != NULL) {
 794                                         free(msg->cm_fields['C']);
 795                                 }
 796                                 if (strlen(mptr->remote_roomname) > 0) {
 797                                         msg->cm_fields['C'] = strdup(mptr->remote_roomname);
 798                                 }
 799                                 else {
 800                                         msg->cm_fields['C'] = strdup(CC->room.QRname);
 801                                 }
 802
 803                                 /* serialize it for transmission */
 804                                 serialize_message(&sermsg, msg);
 805                                 if (sermsg.len > 0) {
 806
 807                                         /* write it to the spool file */
 808                                         snprintf(filename, sizeof filename,"%s/%s",
 809                                                         ctdl_netout_dir,
 810                                                         mptr->remote_nodename);
 811                                         lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
 812                                         fp = fopen(filename, "ab");
 813                                         if (fp != NULL) {
 814                                                 fwrite(sermsg.ser,
 815                                                         sermsg.len, 1, fp);
 816                                                 fclose(fp);
 817                                         }
 818                                         else {
 819                                                 lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
 820                                         }
 821
 822                                         /* free the serialized version */
 823                                         free(sermsg.ser);
 824                                 }
 825
 826                         }
 827                 }
 828                 CtdlFreeMessage(msg);
 829         }
 830
 831         /* update lastsent */
 832         sc->lastsent = msgnum;
 833
 834         /* Delete this message if delete-after-send is set */
 835         if (delete_after_send) {
 836                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 837         }
 838
 839 }
 840
 841
 842 /*
 843  * Batch up and send all outbound traffic from the current room
 844  */
 845 void network_spoolout_room(char *room_to_spool) {
 846         char filename[SIZ];
 847         char buf[SIZ];
 848         char instr[SIZ];
 849         char nodename[256];
 850         char roomname[ROOMNAMELEN];
 851         char nexthop[256];
 852         FILE *fp;
 853         struct SpoolControl sc;
 854         struct namelist *nptr = NULL;
 855         struct maplist *mptr = NULL;
 856         size_t miscsize = 0;
 857         size_t linesize = 0;
 858         int skipthisline = 0;
 859         int i;
 860
 861         /*
 862          * If the room doesn't exist, don't try to perform its networking tasks.
 863          * Normally this should never happen, but once in a while maybe a room gets
 864          * queued for networking and then deleted before it can happen.
 865          */
 866         if (getroom(&CC->room, room_to_spool) != 0) {
 867                 lprintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
 868                 return;
 869         }
 870
 871         memset(&sc, 0, sizeof(struct SpoolControl));
 872         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 873
 874         begin_critical_section(S_NETCONFIGS);
 875
 876         /* Only do net processing for rooms that have netconfigs */
 877         fp = fopen(filename, "r");
 878         if (fp == NULL) {
 879                 end_critical_section(S_NETCONFIGS);
 880                 return;
 881         }
 882
 883         lprintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
 884
 885         while (fgets(buf, sizeof buf, fp) != NULL) {
 886                 buf[strlen(buf)-1] = 0;
 887
 888                 extract_token(instr, buf, 0, '|', sizeof instr);
 889                 if (!strcasecmp(instr, "lastsent")) {
 890                         sc.lastsent = extract_long(buf, 1);
 891                 }
 892                 else if (!strcasecmp(instr, "listrecp")) {
 893                         nptr = (struct namelist *)
 894                                 malloc(sizeof(struct namelist));
 895                         nptr->next = sc.listrecps;
 896                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 897                         sc.listrecps = nptr;
 898                 }
 899                 else if (!strcasecmp(instr, "participate")) {
 900                         nptr = (struct namelist *)
 901                                 malloc(sizeof(struct namelist));
 902                         nptr->next = sc.participates;
 903                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 904                         sc.participates = nptr;
 905                 }
 906                 else if (!strcasecmp(instr, "digestrecp")) {
 907                         nptr = (struct namelist *)
 908                                 malloc(sizeof(struct namelist));
 909                         nptr->next = sc.digestrecps;
 910                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 911                         sc.digestrecps = nptr;
 912                 }
 913                 else if (!strcasecmp(instr, "ignet_push_share")) {
 914                         /* by checking each node's validity, we automatically
 915                          * purge nodes which do not exist from room network
 916                          * configurations at this time.
 917                          */
 918                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 919                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 920                         strcpy(nexthop, "xxx");
 921                         if (is_valid_node(nexthop, NULL, nodename) == 0) {
 922                                 if (strlen(nexthop) == 0) {
 923                                         mptr = (struct maplist *)
 924                                                 malloc(sizeof(struct maplist));
 925                                         mptr->next = sc.ignet_push_shares;
 926                                         strcpy(mptr->remote_nodename, nodename);
 927                                         strcpy(mptr->remote_roomname, roomname);
 928                                         sc.ignet_push_shares = mptr;
 929                                 }
 930                         }
 931                 }
 932                 else {
 933                         /* Preserve 'other' lines ... *unless* they happen to
 934                          * be subscribe/unsubscribe pendings with expired
 935                          * timestamps.
 936                          */
 937                         skipthisline = 0;
 938                         if (!strncasecmp(buf, "subpending|", 11)) {
 939                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 940                                         skipthisline = 1;
 941                                 }
 942                         }
 943                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 944                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 945                                         skipthisline = 1;
 946                                 }
 947                         }
 948
 949                         if (skipthisline == 0) {
 950                                 linesize = strlen(buf);
 951                                 sc.misc = realloc(sc.misc,
 952                                         (miscsize + linesize + 2) );
 953                                 sprintf(&sc.misc[miscsize], "%s\n", buf);
 954                                 miscsize = miscsize + linesize + 1;
 955                         }
 956                 }
 957
 958
 959         }
 960         fclose(fp);
 961
 962         /* If there are digest recipients, we have to build a digest */
 963         if (sc.digestrecps != NULL) {
 964                 sc.digestfp = tmpfile();
 965                 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
 966         }
 967
 968         /* Do something useful */
 969         CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL, NULL,
 970                 network_spool_msg, &sc);
 971
 972         /* If we wrote a digest, deliver it and then close it */
 973         snprintf(buf, sizeof buf, "room_%s@%s",
 974                 CC->room.QRname, config.c_fqdn);
 975         for (i=0; i<strlen(buf); ++i) {
 976                 buf[i] = tolower(buf[i]);
 977                 if (isspace(buf[i])) buf[i] = '_';
 978         }
 979         if (sc.digestfp != NULL) {
 980                 fprintf(sc.digestfp,    " -----------------------------------"
 981                                         "------------------------------------"
 982                                         "-------\n"
 983                                         "You are subscribed to the '%s' "
 984                                         "list.\n"
 985                                         "To post to the list: %s\n",
 986                                         CC->room.QRname, buf
 987                 );
 988                 network_deliver_digest(&sc);    /* deliver and close */
 989         }
 990
 991         /* Now rewrite the config file */
 992         fp = fopen(filename, "w");
 993         if (fp == NULL) {
 994                 lprintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
 995                         filename, strerror(errno));
 996         }
 997         else {
 998                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
 999
1000                 /* Write out the listrecps while freeing from memory at the
1001                  * same time.  Am I clever or what?  :)
1002                  */
1003                 while (sc.listrecps != NULL) {
1004                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
1005                         nptr = sc.listrecps->next;
1006                         free(sc.listrecps);
1007                         sc.listrecps = nptr;
1008                 }
1009                 /* Do the same for digestrecps */
1010                 while (sc.digestrecps != NULL) {
1011                         fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
1012                         nptr = sc.digestrecps->next;
1013                         free(sc.digestrecps);
1014                         sc.digestrecps = nptr;
1015                 }
1016                 /* Do the same for participates */
1017                 while (sc.participates != NULL) {
1018                         fprintf(fp, "participate|%s\n", sc.participates->name);
1019                         nptr = sc.participates->next;
1020                         free(sc.participates);
1021                         sc.participates = nptr;
1022                 }
1023                 while (sc.ignet_push_shares != NULL) {
1024                         /* by checking each node's validity, we automatically
1025                          * purge nodes which do not exist from room network
1026                          * configurations at this time.
1027                          */
1028                         if (is_valid_node(NULL, NULL, sc.ignet_push_shares->remote_nodename) == 0) {
1029                         }
1030                         fprintf(fp, "ignet_push_share|%s",
1031                                 sc.ignet_push_shares->remote_nodename);
1032                         if (strlen(sc.ignet_push_shares->remote_roomname) > 0) {
1033                                 fprintf(fp, "|%s", sc.ignet_push_shares->remote_roomname);
1034                         }
1035                         fprintf(fp, "\n");
1036                         mptr = sc.ignet_push_shares->next;
1037                         free(sc.ignet_push_shares);
1038                         sc.ignet_push_shares = mptr;
1039                 }
1040                 if (sc.misc != NULL) {
1041                         fwrite(sc.misc, strlen(sc.misc), 1, fp);
1042                 }
1043                 free(sc.misc);
1044
1045                 fclose(fp);
1046         }
1047         end_critical_section(S_NETCONFIGS);
1048 }
1049
1050
1051
1052 /*
1053  * Send the *entire* contents of the current room to one specific network node,
1054  * ignoring anything we know about which messages have already undergone
1055  * network processing.  This can be used to bring a new node into sync.
1056  */
1057 int network_sync_to(char *target_node) {
1058         struct SpoolControl sc;
1059         int num_spooled = 0;
1060         int found_node = 0;
1061         char buf[256];
1062         char sc_type[256];
1063         char sc_node[256];
1064         char sc_room[256];
1065         char filename[256];
1066         FILE *fp;
1067
1068         /* Grab the configuration line we're looking for */
1069         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1070         begin_critical_section(S_NETCONFIGS);
1071         fp = fopen(filename, "r");
1072         if (fp == NULL) {
1073                 end_critical_section(S_NETCONFIGS);
1074                 return(-1);
1075         }
1076         while (fgets(buf, sizeof buf, fp) != NULL) {
1077                 buf[strlen(buf)-1] = 0;
1078                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1079                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1080                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1081                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1082                    && (!strcasecmp(sc_node, target_node)) ) {
1083                         found_node = 1;
1084
1085                         /* Concise syntax because we don't need a full linked-list */
1086                         memset(&sc, 0, sizeof(struct SpoolControl));
1087                         sc.ignet_push_shares = (struct maplist *)
1088                                 malloc(sizeof(struct maplist));
1089                         sc.ignet_push_shares->next = NULL;
1090                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1091                                 sc_node,
1092                                 sizeof sc.ignet_push_shares->remote_nodename);
1093                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1094                                 sc_room,
1095                                 sizeof sc.ignet_push_shares->remote_roomname);
1096                 }
1097         }
1098         fclose(fp);
1099         end_critical_section(S_NETCONFIGS);
1100
1101         if (!found_node) return(-1);
1102
1103         /* Send ALL messages */
1104         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1105                 network_spool_msg, &sc);
1106
1107         /* Concise cleanup because we know there's only one node in the sc */
1108         free(sc.ignet_push_shares);
1109
1110         lprintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1111                 num_spooled, target_node);
1112         return(num_spooled);
1113 }
1114
1115
1116 /*
1117  * Implements the NSYN command
1118  */
1119 void cmd_nsyn(char *argbuf) {
1120         int num_spooled;
1121         char target_node[256];
1122
1123         if (CtdlAccessCheck(ac_aide)) return;
1124
1125         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1126         num_spooled = network_sync_to(target_node);
1127         if (num_spooled >= 0) {
1128                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1129         }
1130         else {
1131                 cprintf("%d No such room/node share exists.\n",
1132                         ERROR + ROOM_NOT_FOUND);
1133         }
1134 }
1135
1136
1137
1138 /*
1139  * Batch up and send all outbound traffic from the current room
1140  */
1141 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1142         struct RoomProcList *ptr;
1143
1144         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1145         if (ptr == NULL) return;
1146
1147         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1148         begin_critical_section(S_RPLIST);
1149         ptr->next = rplist;
1150         rplist = ptr;
1151         end_critical_section(S_RPLIST);
1152 }
1153
1154 void destroy_network_queue_room(void)
1155 {
1156         struct RoomProcList *cur, *p;
1157         struct NetMap *nmcur, *nmp;
1158
1159         cur = rplist;
1160         begin_critical_section(S_RPLIST);
1161         while (cur != NULL)
1162         {
1163                 p = cur->next;
1164                 free (cur);
1165                 cur = p;
1166         }
1167         rplist = NULL;
1168         end_critical_section(S_RPLIST);
1169
1170         nmcur = the_netmap;
1171         while (nmcur != NULL)
1172         {
1173                 nmp = nmcur->next;
1174                 free (nmcur);
1175                 nmcur = nmp;
1176         }
1177         the_netmap = NULL;
1178         if (working_ignetcfg != NULL)
1179                 free (working_ignetcfg);
1180         working_ignetcfg = NULL;
1181 }
1182
1183
1184 /*
1185  * Learn topology from path fields
1186  */
1187 void network_learn_topology(char *node, char *path) {
1188         char nexthop[256];
1189         struct NetMap *nmptr;
1190
1191         strcpy(nexthop, "");
1192
1193         if (num_tokens(path, '!') < 3) return;
1194         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1195                 if (!strcasecmp(nmptr->nodename, node)) {
1196                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1197                         nmptr->lastcontact = time(NULL);
1198                         ++netmap_changed;
1199                         return;
1200                 }
1201         }
1202
1203         /* If we got here then it's not in the map, so add it. */
1204         nmptr = (struct NetMap *) malloc(sizeof (struct NetMap));
1205         strcpy(nmptr->nodename, node);
1206         nmptr->lastcontact = time(NULL);
1207         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1208         nmptr->next = the_netmap;
1209         the_netmap = nmptr;
1210         ++netmap_changed;
1211 }
1212
1213
1214
1215
1216 /*
1217  * Bounce a message back to the sender
1218  */
1219 void network_bounce(struct CtdlMessage *msg, char *reason) {
1220         char *oldpath = NULL;
1221         char buf[SIZ];
1222         char bouncesource[SIZ];
1223         char recipient[SIZ];
1224         struct recptypes *valid = NULL;
1225         char force_room[ROOMNAMELEN];
1226         static int serialnum = 0;
1227         size_t size;
1228
1229         lprintf(CTDL_DEBUG, "entering network_bounce()\n");
1230
1231         if (msg == NULL) return;
1232
1233         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1234
1235         /*
1236          * Give it a fresh message ID
1237          */
1238         if (msg->cm_fields['I'] != NULL) {
1239                 free(msg->cm_fields['I']);
1240         }
1241         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1242                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1243         msg->cm_fields['I'] = strdup(buf);
1244
1245         /*
1246          * FIXME ... right now we're just sending a bounce; we really want to
1247          * include the text of the bounced message.
1248          */
1249         if (msg->cm_fields['M'] != NULL) {
1250                 free(msg->cm_fields['M']);
1251         }
1252         msg->cm_fields['M'] = strdup(reason);
1253         msg->cm_format_type = 0;
1254
1255         /*
1256          * Turn the message around
1257          */
1258         if (msg->cm_fields['R'] == NULL) {
1259                 free(msg->cm_fields['R']);
1260         }
1261
1262         if (msg->cm_fields['D'] == NULL) {
1263                 free(msg->cm_fields['D']);
1264         }
1265
1266         snprintf(recipient, sizeof recipient, "%s@%s",
1267                 msg->cm_fields['A'], msg->cm_fields['N']);
1268
1269         if (msg->cm_fields['A'] == NULL) {
1270                 free(msg->cm_fields['A']);
1271         }
1272
1273         if (msg->cm_fields['N'] == NULL) {
1274                 free(msg->cm_fields['N']);
1275         }
1276
1277         if (msg->cm_fields['U'] == NULL) {
1278                 free(msg->cm_fields['U']);
1279         }
1280
1281         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1282         msg->cm_fields['N'] = strdup(config.c_nodename);
1283         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1284
1285         /* prepend our node to the path */
1286         if (msg->cm_fields['P'] != NULL) {
1287                 oldpath = msg->cm_fields['P'];
1288                 msg->cm_fields['P'] = NULL;
1289         }
1290         else {
1291                 oldpath = strdup("unknown_user");
1292         }
1293         size = strlen(oldpath) + SIZ;
1294         msg->cm_fields['P'] = malloc(size);
1295         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1296         free(oldpath);
1297
1298         /* Now submit the message */
1299         valid = validate_recipients(recipient);
1300         if (valid != NULL) if (valid->num_error != 0) {
1301                 free_recipients(valid);
1302                 valid = NULL;
1303         }
1304         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1305                 strcpy(force_room, config.c_aideroom);
1306         }
1307         else {
1308                 strcpy(force_room, "");
1309         }
1310         if ( (valid == NULL) && (strlen(force_room) == 0) ) {
1311                 strcpy(force_room, config.c_aideroom);
1312         }
1313         CtdlSubmitMsg(msg, valid, force_room);
1314
1315         /* Clean up */
1316         if (valid != NULL) free_recipients(valid);
1317         CtdlFreeMessage(msg);
1318         lprintf(CTDL_DEBUG, "leaving network_bounce()\n");
1319 }
1320
1321
1322
1323
1324 /*
1325  * Process a buffer containing a single message from a single file
1326  * from the inbound queue
1327  */
1328 void network_process_buffer(char *buffer, long size) {
1329         struct CtdlMessage *msg = NULL;
1330         long pos;
1331         int field;
1332         struct recptypes *recp = NULL;
1333         char target_room[ROOMNAMELEN];
1334         struct ser_ret sermsg;
1335         char *oldpath = NULL;
1336         char filename[SIZ];
1337         FILE *fp;
1338         char nexthop[SIZ];
1339         unsigned char firstbyte;
1340         unsigned char lastbyte;
1341
1342         /* Validate just a little bit.  First byte should be FF and
1343          * last byte should be 00.
1344          */
1345         memcpy(&firstbyte, &buffer[0], 1);
1346         memcpy(&lastbyte, &buffer[size-1], 1);
1347         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1348                 lprintf(CTDL_ERR, "Corrupt message!  Ignoring.\n");
1349                 return;
1350         }
1351
1352         /* Set default target room to trash */
1353         strcpy(target_room, TWITROOM);
1354
1355         /* Load the message into memory */
1356         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1357         memset(msg, 0, sizeof(struct CtdlMessage));
1358         msg->cm_magic = CTDLMESSAGE_MAGIC;
1359         msg->cm_anon_type = buffer[1];
1360         msg->cm_format_type = buffer[2];
1361
1362         for (pos = 3; pos < size; ++pos) {
1363                 field = buffer[pos];
1364                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1365                 pos = pos + strlen(&buffer[(int)pos]);
1366         }
1367
1368         /* Check for message routing */
1369         if (msg->cm_fields['D'] != NULL) {
1370                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1371
1372                         /* route the message */
1373                         strcpy(nexthop, "");
1374                         if (is_valid_node(nexthop, NULL,
1375                            msg->cm_fields['D']) == 0) {
1376
1377                                 /* prepend our node to the path */
1378                                 if (msg->cm_fields['P'] != NULL) {
1379                                         oldpath = msg->cm_fields['P'];
1380                                         msg->cm_fields['P'] = NULL;
1381                                 }
1382                                 else {
1383                                         oldpath = strdup("unknown_user");
1384                                 }
1385                                 size = strlen(oldpath) + SIZ;
1386                                 msg->cm_fields['P'] = malloc(size);
1387                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1388                                         config.c_nodename, oldpath);
1389                                 free(oldpath);
1390
1391                                 /* serialize the message */
1392                                 serialize_message(&sermsg, msg);
1393
1394                                 /* now send it */
1395                                 if (strlen(nexthop) == 0) {
1396                                         strcpy(nexthop, msg->cm_fields['D']);
1397                                 }
1398                                 snprintf(filename,
1399                                                  sizeof filename,
1400                                                  "%s/%s",
1401                                                  ctdl_netout_dir,
1402                                                  nexthop);
1403                                 lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
1404                                 fp = fopen(filename, "ab");
1405                                 if (fp != NULL) {
1406                                         fwrite(sermsg.ser,
1407                                                 sermsg.len, 1, fp);
1408                                         fclose(fp);
1409                                 }
1410                                 else {
1411                                         lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1412                                 }
1413                                 free(sermsg.ser);
1414                                 CtdlFreeMessage(msg);
1415                                 return;
1416                         }
1417
1418                         else {  /* invalid destination node name */
1419
1420                                 network_bounce(msg,
1421 "A message you sent could not be delivered due to an invalid destination node"
1422 " name.  Please check the address and try sending the message again.\n");
1423                                 msg = NULL;
1424                                 return;
1425
1426                         }
1427                 }
1428         }
1429
1430         /*
1431          * Check to see if we already have a copy of this message, and
1432          * abort its processing if so.  (We used to post a warning to Aide>
1433          * every time this happened, but the network is now so densely
1434          * connected that it's inevitable.)
1435          */
1436         if (network_usetable(msg) != 0) {
1437                 return;
1438         }
1439
1440         /* Learn network topology from the path */
1441         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1442                 network_learn_topology(msg->cm_fields['N'],
1443                                         msg->cm_fields['P']);
1444         }
1445
1446         /* Is the sending node giving us a very persuasive suggestion about
1447          * which room this message should be saved in?  If so, go with that.
1448          */
1449         if (msg->cm_fields['C'] != NULL) {
1450                 safestrncpy(target_room,
1451                         msg->cm_fields['C'],
1452                         sizeof target_room);
1453         }
1454
1455         /* Otherwise, does it have a recipient?  If so, validate it... */
1456         else if (msg->cm_fields['R'] != NULL) {
1457                 recp = validate_recipients(msg->cm_fields['R']);
1458                 if (recp != NULL) if (recp->num_error != 0) {
1459                         network_bounce(msg,
1460                                 "A message you sent could not be delivered due to an invalid address.\n"
1461                                 "Please check the address and try sending the message again.\n");
1462                         msg = NULL;
1463                         free_recipients(recp);
1464                         return;
1465                 }
1466                 strcpy(target_room, "");        /* no target room if mail */
1467         }
1468
1469         /* Our last shot at finding a home for this message is to see if
1470          * it has the O field (Originating room) set.
1471          */
1472         else if (msg->cm_fields['O'] != NULL) {
1473                 safestrncpy(target_room,
1474                         msg->cm_fields['O'],
1475                         sizeof target_room);
1476         }
1477
1478         /* Strip out fields that are only relevant during transit */
1479         if (msg->cm_fields['D'] != NULL) {
1480                 free(msg->cm_fields['D']);
1481                 msg->cm_fields['D'] = NULL;
1482         }
1483         if (msg->cm_fields['C'] != NULL) {
1484                 free(msg->cm_fields['C']);
1485                 msg->cm_fields['C'] = NULL;
1486         }
1487
1488         /* save the message into a room */
1489         if (PerformNetprocHooks(msg, target_room) == 0) {
1490                 msg->cm_flags = CM_SKIP_HOOKS;
1491                 CtdlSubmitMsg(msg, recp, target_room);
1492         }
1493         CtdlFreeMessage(msg);
1494         free_recipients(recp);
1495 }
1496
1497
1498 /*
1499  * Process a single message from a single file from the inbound queue
1500  */
1501 void network_process_message(FILE *fp, long msgstart, long msgend) {
1502         long hold_pos;
1503         long size;
1504         char *buffer;
1505
1506         hold_pos = ftell(fp);
1507         size = msgend - msgstart + 1;
1508         buffer = malloc(size);
1509         if (buffer != NULL) {
1510                 fseek(fp, msgstart, SEEK_SET);
1511                 fread(buffer, size, 1, fp);
1512                 network_process_buffer(buffer, size);
1513                 free(buffer);
1514         }
1515
1516         fseek(fp, hold_pos, SEEK_SET);
1517 }
1518
1519
1520 /*
1521  * Process a single file from the inbound queue
1522  */
1523 void network_process_file(char *filename) {
1524         FILE *fp;
1525         long msgstart = (-1L);
1526         long msgend = (-1L);
1527         long msgcur = 0L;
1528         int ch;
1529
1530
1531         fp = fopen(filename, "rb");
1532         if (fp == NULL) {
1533                 lprintf(CTDL_CRIT, "Error opening %s: %s\n",
1534                         filename, strerror(errno));
1535                 return;
1536         }
1537
1538         lprintf(CTDL_INFO, "network: processing <%s>\n", filename);
1539
1540         /* Look for messages in the data stream and break them out */
1541         while (ch = getc(fp), ch >= 0) {
1542
1543                 if (ch == 255) {
1544                         if (msgstart >= 0L) {
1545                                 msgend = msgcur - 1;
1546                                 network_process_message(fp, msgstart, msgend);
1547                         }
1548                         msgstart = msgcur;
1549                 }
1550
1551                 ++msgcur;
1552         }
1553
1554         msgend = msgcur - 1;
1555         if (msgstart >= 0L) {
1556                 network_process_message(fp, msgstart, msgend);
1557         }
1558
1559         fclose(fp);
1560         unlink(filename);
1561 }
1562
1563
1564 /*
1565  * Process anything in the inbound queue
1566  */
1567 void network_do_spoolin(void) {
1568         DIR *dp;
1569         struct dirent *d;
1570         struct stat statbuf;
1571         char filename[256];
1572         static time_t last_spoolin_mtime = 0L;
1573
1574         /*
1575          * Check the spoolin directory's modification time.  If it hasn't
1576          * been touched, we don't need to scan it.
1577          */
1578         if (stat(ctdl_netin_dir, &statbuf)) return;
1579         if (statbuf.st_mtime == last_spoolin_mtime) {
1580                 lprintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1581                 return;
1582         }
1583         last_spoolin_mtime = statbuf.st_mtime;
1584         lprintf(CTDL_DEBUG, "network: processing inbound queue\n");
1585
1586         /*
1587          * Ok, there's something interesting in there, so scan it.
1588          */
1589         dp = opendir(ctdl_netin_dir);
1590         if (dp == NULL) return;
1591
1592         while (d = readdir(dp), d != NULL) {
1593                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1594                         snprintf(filename,
1595                                          sizeof filename,
1596                                          "%s/%s",
1597                                          ctdl_netin_dir,
1598                                          d->d_name);
1599                         network_process_file(filename);
1600                 }
1601         }
1602
1603         closedir(dp);
1604 }
1605
1606 /*
1607  * Delete any files in the outbound queue that were intended
1608  * to be sent to nodes which no longer exist.
1609  */
1610 void network_purge_spoolout(void) {
1611         DIR *dp;
1612         struct dirent *d;
1613         char filename[256];
1614         char nexthop[256];
1615         int i;
1616
1617         dp = opendir(ctdl_netout_dir);
1618         if (dp == NULL) return;
1619
1620         while (d = readdir(dp), d != NULL) {
1621                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1622                         continue;
1623                 snprintf(filename,
1624                                  sizeof filename,
1625                                  "%s/%s",
1626                                  ctdl_netout_dir,
1627                                  d->d_name);
1628
1629                 strcpy(nexthop, "");
1630                 i = is_valid_node(nexthop, NULL, d->d_name);
1631
1632                 if ( (i != 0) || (strlen(nexthop) > 0) ) {
1633                         unlink(filename);
1634                 }
1635         }
1636
1637
1638         closedir(dp);
1639 }
1640
1641
1642 /*
1643  * receive network spool from the remote system
1644  */
1645 void receive_spool(int sock, char *remote_nodename) {
1646         long download_len;
1647         long bytes_received;
1648         char buf[SIZ];
1649         static char pbuf[IGNET_PACKET_SIZE];
1650         char tempfilename[PATH_MAX];
1651         long plen;
1652         FILE *fp;
1653
1654         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
1655         if (sock_puts(sock, "NDOP") < 0) return;
1656         if (sock_gets(sock, buf) < 0) return;
1657         lprintf(CTDL_DEBUG, "<%s\n", buf);
1658         if (buf[0] != '2') {
1659                 return;
1660         }
1661         download_len = extract_long(&buf[4], 0);
1662
1663         bytes_received = 0L;
1664         fp = fopen(tempfilename, "w");
1665         if (fp == NULL) {
1666                 lprintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1667                         strerror(errno));
1668                 return;
1669         }
1670
1671         while (bytes_received < download_len) {
1672                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1673                         bytes_received,
1674                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1675                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1676                 if (sock_puts(sock, buf) < 0) {
1677                         fclose(fp);
1678                         unlink(tempfilename);
1679                         return;
1680                 }
1681                 if (sock_gets(sock, buf) < 0) {
1682                         fclose(fp);
1683                         unlink(tempfilename);
1684                         return;
1685                 }
1686                 if (buf[0] == '6') {
1687                         plen = extract_long(&buf[4], 0);
1688                         if (sock_read(sock, pbuf, plen) < 0) {
1689                                 fclose(fp);
1690                                 unlink(tempfilename);
1691                                 return;
1692                         }
1693                         fwrite((char *) pbuf, plen, 1, fp);
1694                         bytes_received = bytes_received + plen;
1695                 }
1696         }
1697
1698         fclose(fp);
1699         if (sock_puts(sock, "CLOS") < 0) {
1700                 unlink(tempfilename);
1701                 return;
1702         }
1703         if (sock_gets(sock, buf) < 0) {
1704                 unlink(tempfilename);
1705                 return;
1706         }
1707         if (download_len > 0)
1708                 lprintf(CTDL_NOTICE, "Received %ld octets from <%s>",
1709                                 download_len, remote_nodename);
1710         lprintf(CTDL_DEBUG, "%s", buf);
1711         /* TODO: make move inline. forking is verry expensive. */
1712         snprintf(buf,
1713                          sizeof buf,
1714                          "mv %s %s/%s.%ld",
1715                          tempfilename,
1716                          ctdl_netin_dir,
1717                          remote_nodename,
1718                          (long) getpid());
1719         system(buf);
1720 }
1721
1722
1723
1724 /*
1725  * transmit network spool to the remote system
1726  */
1727 void transmit_spool(int sock, char *remote_nodename)
1728 {
1729         char buf[SIZ];
1730         char pbuf[4096];
1731         long plen;
1732         long bytes_to_write, thisblock, bytes_written;
1733         int fd;
1734         char sfname[128];
1735
1736         if (sock_puts(sock, "NUOP") < 0) return;
1737         if (sock_gets(sock, buf) < 0) return;
1738         lprintf(CTDL_DEBUG, "<%s\n", buf);
1739         if (buf[0] != '2') {
1740                 return;
1741         }
1742
1743         snprintf(sfname, sizeof sfname,
1744                          "%s/%s",
1745                          ctdl_netout_dir,
1746                          remote_nodename);
1747         fd = open(sfname, O_RDONLY);
1748         if (fd < 0) {
1749                 if (errno != ENOENT) {
1750                         lprintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1751                                 strerror(errno));
1752                 }
1753                 return;
1754         }
1755         bytes_written = 0;
1756         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1757                 bytes_to_write = plen;
1758                 while (bytes_to_write > 0L) {
1759                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1760                         if (sock_puts(sock, buf) < 0) {
1761                                 close(fd);
1762                                 return;
1763                         }
1764                         if (sock_gets(sock, buf) < 0) {
1765                                 close(fd);
1766                                 return;
1767                         }
1768                         thisblock = atol(&buf[4]);
1769                         if (buf[0] == '7') {
1770                                 if (sock_write(sock, pbuf,
1771                                    (int) thisblock) < 0) {
1772                                         close(fd);
1773                                         return;
1774                                 }
1775                                 bytes_to_write -= thisblock;
1776                                 bytes_written += thisblock;
1777                         } else {
1778                                 goto ABORTUPL;
1779                         }
1780                 }
1781         }
1782
1783 ABORTUPL:
1784         close(fd);
1785         if (sock_puts(sock, "UCLS 1") < 0) return;
1786         if (sock_gets(sock, buf) < 0) return;
1787         lprintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n",
1788                         bytes_written, remote_nodename);
1789         lprintf(CTDL_DEBUG, "<%s\n", buf);
1790         if (buf[0] == '2') {
1791                 lprintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
1792                 unlink(sfname);
1793         }
1794 }
1795
1796
1797
1798 /*
1799  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1800  */
1801 void network_poll_node(char *node, char *secret, char *host, char *port) {
1802         int sock;
1803         char buf[SIZ];
1804
1805         if (network_talking_to(node, NTT_CHECK)) return;
1806         network_talking_to(node, NTT_ADD);
1807         lprintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
1808
1809         sock = sock_connect(host, port, "tcp");
1810         if (sock < 0) {
1811                 lprintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
1812                 network_talking_to(node, NTT_REMOVE);
1813                 return;
1814         }
1815
1816         lprintf(CTDL_DEBUG, "Connected!\n");
1817
1818         /* Read the server greeting */
1819         if (sock_gets(sock, buf) < 0) goto bail;
1820         lprintf(CTDL_DEBUG, ">%s\n", buf);
1821
1822         /* Identify ourselves */
1823         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1824         lprintf(CTDL_DEBUG, "<%s\n", buf);
1825         if (sock_puts(sock, buf) <0) goto bail;
1826         if (sock_gets(sock, buf) < 0) goto bail;
1827         lprintf(CTDL_DEBUG, ">%s\n", buf);
1828         if (buf[0] != '2') goto bail;
1829
1830         /* At this point we are authenticated. */
1831         receive_spool(sock, node);
1832         transmit_spool(sock, node);
1833
1834         sock_puts(sock, "QUIT");
1835 bail:   sock_close(sock);
1836         network_talking_to(node, NTT_REMOVE);
1837 }
1838
1839
1840
1841 /*
1842  * Poll other Citadel nodes and transfer inbound/outbound network data.
1843  * Set "full" to nonzero to force a poll of every node, or to zero to poll
1844  * only nodes to which we have data to send.
1845  */
1846 void network_poll_other_citadel_nodes(int full_poll) {
1847         int i;
1848         char linebuf[256];
1849         char node[SIZ];
1850         char host[256];
1851         char port[256];
1852         char secret[256];
1853         int poll = 0;
1854         char spoolfile[256];
1855
1856         if (working_ignetcfg == NULL) {
1857                 lprintf(CTDL_DEBUG, "No nodes defined - not polling\n");
1858                 return;
1859         }
1860
1861         /* Use the string tokenizer to grab one line at a time */
1862         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
1863                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
1864                 extract_token(node, linebuf, 0, '|', sizeof node);
1865                 extract_token(secret, linebuf, 1, '|', sizeof secret);
1866                 extract_token(host, linebuf, 2, '|', sizeof host);
1867                 extract_token(port, linebuf, 3, '|', sizeof port);
1868                 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1869                    && (strlen(host) > 0) && strlen(port) > 0) {
1870                         poll = full_poll;
1871                         if (poll == 0) {
1872                                 snprintf(spoolfile,
1873                                                  sizeof spoolfile,
1874                                                  "%s/%s",
1875                                                  ctdl_netout_dir,
1876                                                  node);
1877                                 if (access(spoolfile, R_OK) == 0) {
1878                                         poll = 1;
1879                                 }
1880                         }
1881                         if (poll) {
1882                                 network_poll_node(node, secret, host, port);
1883                         }
1884                 }
1885         }
1886
1887 }
1888
1889
1890
1891
1892 /*
1893  * It's ok if these directories already exist.  Just fail silently.
1894  */
1895 void create_spool_dirs(void) {
1896         mkdir(ctdl_spool_dir, 0700);
1897         chown(ctdl_spool_dir, CTDLUID, (-1));
1898         mkdir(ctdl_netin_dir, 0700);
1899         chown(ctdl_netin_dir, CTDLUID, (-1));
1900         mkdir(ctdl_netout_dir, 0700);
1901         chown(ctdl_netout_dir, CTDLUID, (-1));
1902 }
1903
1904
1905
1906
1907
1908 /*
1909  * network_do_queue()
1910  *
1911  * Run through the rooms doing various types of network stuff.
1912  */
1913 void network_do_queue(void) {
1914         static time_t last_run = 0L;
1915         struct RoomProcList *ptr;
1916         int full_processing = 1;
1917
1918         /*
1919          * Run the full set of processing tasks no more frequently
1920          * than once every n seconds
1921          */
1922         if ( (time(NULL) - last_run) < config.c_net_freq ) {
1923                 full_processing = 0;
1924         }
1925
1926         /*
1927          * This is a simple concurrency check to make sure only one queue run
1928          * is done at a time.  We could do this with a mutex, but since we
1929          * don't really require extremely fine granularity here, we'll do it
1930          * with a static variable instead.
1931          */
1932         if (doing_queue) return;
1933         doing_queue = 1;
1934
1935         /* Load the IGnet Configuration into memory */
1936         load_working_ignetcfg();
1937
1938         /*
1939          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
1940          * then we poll everyone.  Otherwise we only poll nodes we have stuff
1941          * to send to.
1942          */
1943         network_poll_other_citadel_nodes(full_processing);
1944
1945         /*
1946          * Load the network map and filter list into memory.
1947          */
1948         read_network_map();
1949         filterlist = load_filter_list();
1950
1951         /*
1952          * Go ahead and run the queue
1953          */
1954         if (full_processing) {
1955                 lprintf(CTDL_DEBUG, "network: loading outbound queue\n");
1956                 ForEachRoom(network_queue_room, NULL);
1957         }
1958
1959         if (rplist != NULL) {
1960                 lprintf(CTDL_DEBUG, "network: running outbound queue\n");
1961                 while (rplist != NULL) {
1962                         char spoolroomname[ROOMNAMELEN];
1963                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
1964                         begin_critical_section(S_RPLIST);
1965
1966                         /* pop this record off the list */
1967                         ptr = rplist;
1968                         rplist = rplist->next;
1969                         free(ptr);
1970
1971                         /* invalidate any duplicate entries to prevent double processing */
1972                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
1973                                 if (!strcasecmp(ptr->name, spoolroomname)) {
1974                                         ptr->name[0] = 0;
1975                                 }
1976                         }
1977
1978                         end_critical_section(S_RPLIST);
1979                         if (spoolroomname[0] != 0) {
1980                                 network_spoolout_room(spoolroomname);
1981                         }
1982                 }
1983         }
1984
1985         /* If there is anything in the inbound queue, process it */
1986         network_do_spoolin();
1987
1988         /* Save the network map back to disk */
1989         write_network_map();
1990
1991         /* Free the filter list in memory */
1992         free_filter_list(filterlist);
1993         filterlist = NULL;
1994
1995         network_purge_spoolout();
1996
1997         lprintf(CTDL_DEBUG, "network: queue run completed\n");
1998
1999         if (full_processing) {
2000                 last_run = time(NULL);
2001         }
2002
2003         doing_queue = 0;
2004 }
2005
2006
2007 /*
2008  * cmd_netp() - authenticate to the server as another Citadel node polling
2009  *            for network traffic
2010  */
2011 void cmd_netp(char *cmdbuf)
2012 {
2013         char node[256];
2014         char pass[256];
2015         int v;
2016
2017         char secret[256];
2018         char nexthop[256];
2019
2020         /* Authenticate */
2021         extract_token(node, cmdbuf, 0, '|', sizeof node);
2022         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2023
2024         if (doing_queue) {
2025                 lprintf(CTDL_WARNING, "Network node <%s> refused - spooling", node);
2026                 cprintf("%d spooling - try again in a few minutes\n",
2027                         ERROR + RESOURCE_BUSY);
2028                 return;
2029         }
2030
2031         /* load the IGnet Configuration to check node validity */
2032         load_working_ignetcfg();
2033         v = is_valid_node(nexthop, secret, node);
2034
2035         if (v != 0) {
2036                 lprintf(CTDL_WARNING, "Unknown node <%s>\n", node);
2037                 cprintf("%d authentication failed\n",
2038                         ERROR + PASSWORD_REQUIRED);
2039                 return;
2040         }
2041
2042         if (strcasecmp(pass, secret)) {
2043                 lprintf(CTDL_WARNING, "Bad password for network node <%s>", node);
2044                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2045                 return;
2046         }
2047
2048         if (network_talking_to(node, NTT_CHECK)) {
2049                 lprintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2050                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2051                 return;
2052         }
2053
2054         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2055         network_talking_to(node, NTT_ADD);
2056         lprintf(CTDL_NOTICE, "Network node <%s> logged in\n", CC->net_node);
2057         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
2058                 CC->net_node);
2059 }
2060
2061 int network_room_handler (struct ctdlroom *room)
2062 {
2063         network_queue_room(room, NULL);
2064         return 0;
2065 }
2066
2067 /*
2068  * Module entry point
2069  */
2070 CTDL_MODULE_INIT(network)
2071 {
2072         create_spool_dirs();
2073         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2074         CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2075         CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2076         CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2077         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
2078         CtdlRegisterRoomHook(network_room_handler);
2079
2080         /* return our Subversion id for the Log */
2081         return "$Id$";
2082 }