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