citadel/modules/network/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 <libcitadel.h>
  52 #include "citadel.h"
  53 #include "server.h"
  54 #include "citserver.h"
  55 #include "support.h"
  56 #include "config.h"
  57 #include "room_ops.h"
  58 #include "user_ops.h"
  59 #include "policy.h"
  60 #include "database.h"
  61 #include "msgbase.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 #include "threads.h"
  68
  69 #ifndef HAVE_SNPRINTF
  70 #include "snprintf.h"
  71 #endif
  72
  73
  74 #include "ctdl_module.h"
  75
  76
  77
  78 /* Nonzero while we are doing network processing */
  79 static int doing_queue = 0;
  80
  81 /*
  82  * When we do network processing, it's accomplished in two passes; one to
  83  * gather a list of rooms and one to actually do them.  It's ok that rplist
  84  * is global; we have a mutex that keeps it safe.
  85  */
  86 struct RoomProcList *rplist = NULL;
  87
  88 /*
  89  * We build a map of network nodes during processing.
  90  */
  91 NetMap *the_netmap = NULL;
  92 int netmap_changed = 0;
  93 char *working_ignetcfg = NULL;
  94
  95 /*
  96  * Load or refresh the Citadel network (IGnet) configuration for this node.
  97  */
  98 void load_working_ignetcfg(void) {
  99         char *cfg;
 100         char *oldcfg;
 101
 102         cfg = CtdlGetSysConfig(IGNETCFG);
 103         if (cfg == NULL) {
 104                 cfg = strdup("");
 105         }
 106
 107         oldcfg = working_ignetcfg;
 108         working_ignetcfg = cfg;
 109         if (oldcfg != NULL) {
 110                 free(oldcfg);
 111         }
 112 }
 113
 114
 115
 116
 117
 118 /*
 119  * Keep track of what messages to reject
 120  */
 121 FilterList *load_filter_list(void) {
 122         char *serialized_list = NULL;
 123         int i;
 124         char buf[SIZ];
 125         FilterList *newlist = NULL;
 126         FilterList *nptr;
 127
 128         serialized_list = CtdlGetSysConfig(FILTERLIST);
 129         if (serialized_list == NULL) return(NULL); /* if null, no entries */
 130
 131         /* Use the string tokenizer to grab one line at a time */
 132         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
 133                 extract_token(buf, serialized_list, i, '\n', sizeof buf);
 134                 nptr = (FilterList *) malloc(sizeof(FilterList));
 135                 extract_token(nptr->fl_user, buf, 0, '|', sizeof nptr->fl_user);
 136                 striplt(nptr->fl_user);
 137                 extract_token(nptr->fl_room, buf, 1, '|', sizeof nptr->fl_room);
 138                 striplt(nptr->fl_room);
 139                 extract_token(nptr->fl_node, buf, 2, '|', sizeof nptr->fl_node);
 140                 striplt(nptr->fl_node);
 141
 142                 /* Cowardly refuse to add an any/any/any entry that would
 143                  * end up filtering every single message.
 144                  */
 145                 if (IsEmptyStr(nptr->fl_user) &&
 146                     IsEmptyStr(nptr->fl_room) &&
 147                     IsEmptyStr(nptr->fl_node)) {
 148                         free(nptr);
 149                 }
 150                 else {
 151                         nptr->next = newlist;
 152                         newlist = nptr;
 153                 }
 154         }
 155
 156         free(serialized_list);
 157         return newlist;
 158 }
 159
 160
 161 void free_filter_list(FilterList *fl) {
 162         if (fl == NULL) return;
 163         free_filter_list(fl->next);
 164         free(fl);
 165 }
 166
 167
 168
 169 /*
 170  * Check the use table.  This is a list of messages which have recently
 171  * arrived on the system.  It is maintained and queried to prevent the same
 172  * message from being entered into the database multiple times if it happens
 173  * to arrive multiple times by accident.
 174  */
 175 int network_usetable(struct CtdlMessage *msg) {
 176
 177         char msgid[SIZ];
 178         struct cdbdata *cdbut;
 179         struct UseTable ut;
 180
 181         /* Bail out if we can't generate a message ID */
 182         if (msg == NULL) {
 183                 return(0);
 184         }
 185         if (msg->cm_fields['I'] == NULL) {
 186                 return(0);
 187         }
 188         if (IsEmptyStr(msg->cm_fields['I'])) {
 189                 return(0);
 190         }
 191
 192         /* Generate the message ID */
 193         strcpy(msgid, msg->cm_fields['I']);
 194         if (haschar(msgid, '@') == 0) {
 195                 strcat(msgid, "@");
 196                 if (msg->cm_fields['N'] != NULL) {
 197                         strcat(msgid, msg->cm_fields['N']);
 198                 }
 199                 else {
 200                         return(0);
 201                 }
 202         }
 203
 204         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 205         if (cdbut != NULL) {
 206                 cdb_free(cdbut);
 207                 return(1);
 208         }
 209
 210         /* If we got to this point, it's unique: add it. */
 211         strcpy(ut.ut_msgid, msgid);
 212         ut.ut_timestamp = time(NULL);
 213         cdb_store(CDB_USETABLE, msgid, strlen(msgid),
 214                 &ut, sizeof(struct UseTable) );
 215         return(0);
 216 }
 217
 218
 219 /*
 220  * Read the network map from its configuration file into memory.
 221  */
 222 void read_network_map(void) {
 223         char *serialized_map = NULL;
 224         int i;
 225         char buf[SIZ];
 226         NetMap *nmptr;
 227
 228         serialized_map = CtdlGetSysConfig(IGNETMAP);
 229         if (serialized_map == NULL) return;     /* if null, no entries */
 230
 231         /* Use the string tokenizer to grab one line at a time */
 232         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 233                 extract_token(buf, serialized_map, i, '\n', sizeof buf);
 234                 nmptr = (NetMap *) malloc(sizeof(NetMap));
 235                 extract_token(nmptr->nodename, buf, 0, '|', sizeof nmptr->nodename);
 236                 nmptr->lastcontact = extract_long(buf, 1);
 237                 extract_token(nmptr->nexthop, buf, 2, '|', sizeof nmptr->nexthop);
 238                 nmptr->next = the_netmap;
 239                 the_netmap = nmptr;
 240         }
 241
 242         free(serialized_map);
 243         netmap_changed = 0;
 244 }
 245
 246
 247 /*
 248  * Write the network map from memory back to the configuration file.
 249  */
 250 void write_network_map(void) {
 251         char *serialized_map = NULL;
 252         NetMap *nmptr;
 253
 254
 255         if (netmap_changed) {
 256                 serialized_map = strdup("");
 257
 258                 if (the_netmap != NULL) {
 259                         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 260                                 serialized_map = realloc(serialized_map,
 261                                                         (strlen(serialized_map)+SIZ) );
 262                                 if (!IsEmptyStr(nmptr->nodename)) {
 263                                         snprintf(&serialized_map[strlen(serialized_map)],
 264                                                 SIZ,
 265                                                 "%s|%ld|%s\n",
 266                                                 nmptr->nodename,
 267                                                 (long)nmptr->lastcontact,
 268                                                 nmptr->nexthop);
 269                                 }
 270                         }
 271                 }
 272
 273                 CtdlPutSysConfig(IGNETMAP, serialized_map);
 274                 free(serialized_map);
 275         }
 276
 277         /* Now free the list */
 278         while (the_netmap != NULL) {
 279                 nmptr = the_netmap->next;
 280                 free(the_netmap);
 281                 the_netmap = nmptr;
 282         }
 283         netmap_changed = 0;
 284 }
 285
 286
 287
 288 /*
 289  * Check the network map and determine whether the supplied node name is
 290  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 291  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 292  * shared secret.
 293  */
 294 int is_valid_node(char *nexthop, char *secret, char *node) {
 295         int i;
 296         char linebuf[SIZ];
 297         char buf[SIZ];
 298         int retval;
 299         NetMap *nmptr;
 300
 301         if (node == NULL) {
 302                 return(-1);
 303         }
 304
 305         /*
 306          * First try the neighbor nodes
 307          */
 308         if (working_ignetcfg == NULL) {
 309                 lprintf(CTDL_ERR, "working_ignetcfg is NULL!\n");
 310                 if (nexthop != NULL) {
 311                         strcpy(nexthop, "");
 312                 }
 313                 return(-1);
 314         }
 315
 316         retval = (-1);
 317         if (nexthop != NULL) {
 318                 strcpy(nexthop, "");
 319         }
 320
 321         /* Use the string tokenizer to grab one line at a time */
 322         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
 323                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
 324                 extract_token(buf, linebuf, 0, '|', sizeof buf);
 325                 if (!strcasecmp(buf, node)) {
 326                         if (nexthop != NULL) {
 327                                 strcpy(nexthop, "");
 328                         }
 329                         if (secret != NULL) {
 330                                 extract_token(secret, linebuf, 1, '|', 256);
 331                         }
 332                         retval = 0;
 333                 }
 334         }
 335
 336         if (retval == 0) {
 337                 return(retval);         /* yup, it's a direct neighbor */
 338         }
 339
 340         /*
 341          * If we get to this point we have to see if we know the next hop
 342          */
 343         if (the_netmap != NULL) {
 344                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 345                         if (!strcasecmp(nmptr->nodename, node)) {
 346                                 if (nexthop != NULL) {
 347                                         strcpy(nexthop, nmptr->nexthop);
 348                                 }
 349                                 return(0);
 350                         }
 351                 }
 352         }
 353
 354         /*
 355          * If we get to this point, the supplied node name is bogus.
 356          */
 357         lprintf(CTDL_ERR, "Invalid node name <%s>\n", node);
 358         return(-1);
 359 }
 360
 361
 362
 363
 364
 365 void cmd_gnet(char *argbuf) {
 366         char filename[SIZ];
 367         char buf[SIZ];
 368         FILE *fp;
 369
 370         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 371                 /* users can edit the netconfigs for their own mailbox rooms */
 372         }
 373         else if (CtdlAccessCheck(ac_room_aide)) return;
 374
 375         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 376         cprintf("%d Network settings for room #%ld <%s>\n",
 377                 LISTING_FOLLOWS,
 378                 CC->room.QRnumber, CC->room.QRname);
 379
 380         fp = fopen(filename, "r");
 381         if (fp != NULL) {
 382                 while (fgets(buf, sizeof buf, fp) != NULL) {
 383                         buf[strlen(buf)-1] = 0;
 384                         cprintf("%s\n", buf);
 385                 }
 386                 fclose(fp);
 387         }
 388
 389         cprintf("000\n");
 390 }
 391
 392
 393 void cmd_snet(char *argbuf) {
 394         char tempfilename[SIZ];
 395         char filename[SIZ];
 396         char buf[SIZ];
 397         FILE *fp, *newfp;
 398
 399         unbuffer_output();
 400
 401         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 402                 /* users can edit the netconfigs for their own mailbox rooms */
 403         }
 404         else if (CtdlAccessCheck(ac_room_aide)) return;
 405
 406         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
 407         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 408
 409         fp = fopen(tempfilename, "w");
 410         if (fp == NULL) {
 411                 cprintf("%d Cannot open %s: %s\n",
 412                         ERROR + INTERNAL_ERROR,
 413                         tempfilename,
 414                         strerror(errno));
 415         }
 416
 417         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 418         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 419                 fprintf(fp, "%s\n", buf);
 420         }
 421         fclose(fp);
 422
 423         /* Now copy the temp file to its permanent location.
 424          * (We copy instead of link because they may be on different filesystems)
 425          */
 426         begin_critical_section(S_NETCONFIGS);
 427         fp = fopen(tempfilename, "r");
 428         if (fp != NULL) {
 429                 newfp = fopen(filename, "w");
 430                 if (newfp != NULL) {
 431                         while (fgets(buf, sizeof buf, fp) != NULL) {
 432                                 fprintf(newfp, "%s", buf);
 433                         }
 434                         fclose(newfp);
 435                 }
 436                 fclose(fp);
 437         }
 438         end_critical_section(S_NETCONFIGS);
 439         unlink(tempfilename);
 440 }
 441
 442
 443 /*
 444  * Deliver digest messages
 445  */
 446 void network_deliver_digest(SpoolControl *sc) {
 447         char buf[SIZ];
 448         int i;
 449         struct CtdlMessage *msg = NULL;
 450         long msglen;
 451         char *recps = NULL;
 452         size_t recps_len = SIZ;
 453         struct recptypes *valid;
 454         namelist *nptr;
 455
 456         if (sc->num_msgs_spooled < 1) {
 457                 fclose(sc->digestfp);
 458                 sc->digestfp = NULL;
 459                 return;
 460         }
 461
 462         msg = malloc(sizeof(struct CtdlMessage));
 463         memset(msg, 0, sizeof(struct CtdlMessage));
 464         msg->cm_magic = CTDLMESSAGE_MAGIC;
 465         msg->cm_format_type = FMT_RFC822;
 466         msg->cm_anon_type = MES_NORMAL;
 467
 468         sprintf(buf, "%ld", time(NULL));
 469         msg->cm_fields['T'] = strdup(buf);
 470         msg->cm_fields['A'] = strdup(CC->room.QRname);
 471         snprintf(buf, sizeof buf, "[%s]", CC->room.QRname);
 472         msg->cm_fields['U'] = strdup(buf);
 473         sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
 474         for (i=0; buf[i]; ++i) {
 475                 if (isspace(buf[i])) buf[i]='_';
 476                 buf[i] = tolower(buf[i]);
 477         }
 478         msg->cm_fields['F'] = strdup(buf);
 479         msg->cm_fields['R'] = strdup(buf);
 480
 481         /*
 482          * Go fetch the contents of the digest
 483          */
 484         fseek(sc->digestfp, 0L, SEEK_END);
 485         msglen = ftell(sc->digestfp);
 486
 487         msg->cm_fields['M'] = malloc(msglen + 1);
 488         fseek(sc->digestfp, 0L, SEEK_SET);
 489         fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 490         msg->cm_fields['M'][msglen] = 0;
 491
 492         fclose(sc->digestfp);
 493         sc->digestfp = NULL;
 494
 495         /* Now generate the delivery instructions */
 496
 497         /*
 498          * Figure out how big a buffer we need to allocate
 499          */
 500         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 501                 recps_len = recps_len + strlen(nptr->name) + 2;
 502         }
 503
 504         recps = malloc(recps_len);
 505
 506         if (recps == NULL) {
 507                 lprintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 508                 abort();
 509         }
 510
 511         strcpy(recps, "");
 512
 513         /* Each recipient */
 514         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 515                 if (nptr != sc->digestrecps) {
 516                         strcat(recps, ",");
 517                 }
 518                 strcat(recps, nptr->name);
 519         }
 520
 521         /* Now submit the message */
 522         valid = validate_recipients(recps, NULL, 0);
 523         free(recps);
 524         CtdlSubmitMsg(msg, valid, NULL);
 525         CtdlFreeMessage(msg);
 526         free_recipients(valid);
 527 }
 528
 529
 530 /*
 531  * Deliver list messages to everyone on the list ... efficiently
 532  */
 533 void network_deliver_list(struct CtdlMessage *msg, SpoolControl *sc) {
 534         char *recps = NULL;
 535         size_t recps_len = SIZ;
 536         struct recptypes *valid;
 537         namelist *nptr;
 538
 539         /* Don't do this if there were no recipients! */
 540         if (sc->listrecps == NULL) return;
 541
 542         /* Now generate the delivery instructions */
 543
 544         /*
 545          * Figure out how big a buffer we need to allocate
 546          */
 547         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 548                 recps_len = recps_len + strlen(nptr->name) + 2;
 549         }
 550
 551         recps = malloc(recps_len);
 552
 553         if (recps == NULL) {
 554                 lprintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 555                 abort();
 556         }
 557
 558         strcpy(recps, "");
 559
 560         /* Each recipient */
 561         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 562                 if (nptr != sc->listrecps) {
 563                         strcat(recps, ",");
 564                 }
 565                 strcat(recps, nptr->name);
 566         }
 567
 568         /* Now submit the message */
 569         valid = validate_recipients(recps, NULL, 0);
 570         free(recps);
 571         CtdlSubmitMsg(msg, valid, NULL);
 572         free_recipients(valid);
 573         /* Do not call CtdlFreeMessage(msg) here; the caller will free it. */
 574 }
 575
 576
 577
 578
 579 /*
 580  * Spools out one message from the list.
 581  */
 582 void network_spool_msg(long msgnum, void *userdata) {
 583         SpoolControl *sc;
 584         int i;
 585         char *newpath = NULL;
 586         size_t instr_len = SIZ;
 587         struct CtdlMessage *msg = NULL;
 588         namelist *nptr;
 589         maplist *mptr;
 590         struct ser_ret sermsg;
 591         FILE *fp;
 592         char filename[SIZ];
 593         char buf[SIZ];
 594         int bang = 0;
 595         int send = 1;
 596         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 597         int ok_to_participate = 0;
 598         struct recptypes *valid;
 599
 600         sc = (SpoolControl *)userdata;
 601
 602         /*
 603          * Process mailing list recipients
 604          */
 605         instr_len = SIZ;
 606         if (sc->listrecps != NULL) {
 607                 /* Fetch the message.  We're going to need to modify it
 608                  * in order to insert the [list name] in it, etc.
 609                  */
 610                 msg = CtdlFetchMessage(msgnum, 1);
 611                 if (msg != NULL) {
 612
 613                         /* Prepend "[List name]" to the subject */
 614                         if (msg->cm_fields['U'] == NULL) {
 615                                 msg->cm_fields['U'] = strdup("(no subject)");
 616                         }
 617                         snprintf(buf, sizeof buf, "[%s] %s", CC->room.QRname, msg->cm_fields['U']);
 618                         free(msg->cm_fields['U']);
 619                         msg->cm_fields['U'] = strdup(buf);
 620
 621                         /* Set the recipient of the list message to the
 622                          * email address of the room itself.
 623                          * FIXME ... I want to be able to pick any address
 624                          */
 625                         if (msg->cm_fields['R'] != NULL) {
 626                                 free(msg->cm_fields['R']);
 627                         }
 628                         msg->cm_fields['R'] = malloc(256);
 629                         snprintf(msg->cm_fields['R'], 256,
 630                                 "room_%s@%s", CC->room.QRname,
 631                                 config.c_fqdn);
 632                         for (i=0; msg->cm_fields['R'][i]; ++i) {
 633                                 if (isspace(msg->cm_fields['R'][i])) {
 634                                         msg->cm_fields['R'][i] = '_';
 635                                 }
 636                         }
 637
 638                         /* Handle delivery */
 639                         network_deliver_list(msg, sc);
 640                         CtdlFreeMessage(msg);
 641                 }
 642         }
 643
 644         /*
 645          * Process digest recipients
 646          */
 647         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 648                 msg = CtdlFetchMessage(msgnum, 1);
 649                 if (msg != NULL) {
 650                         fprintf(sc->digestfp,   " -----------------------------------"
 651                                                 "------------------------------------"
 652                                                 "-------\n");
 653                         fprintf(sc->digestfp, "From: ");
 654                         if (msg->cm_fields['A'] != NULL) {
 655                                 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
 656                         }
 657                         if (msg->cm_fields['F'] != NULL) {
 658                                 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
 659                         }
 660                         else if (msg->cm_fields['N'] != NULL) {
 661                                 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
 662                         }
 663                         fprintf(sc->digestfp, "\n");
 664                         if (msg->cm_fields['U'] != NULL) {
 665                                 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
 666                         }
 667
 668                         CC->redirect_buffer = malloc(SIZ);
 669                         CC->redirect_len = 0;
 670                         CC->redirect_alloc = SIZ;
 671
 672                         safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
 673                         CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0);
 674
 675                         striplt(CC->redirect_buffer);
 676                         fprintf(sc->digestfp, "\n%s\n", CC->redirect_buffer);
 677
 678                         free(CC->redirect_buffer);
 679                         CC->redirect_buffer = NULL;
 680                         CC->redirect_len = 0;
 681                         CC->redirect_alloc = 0;
 682
 683                         sc->num_msgs_spooled += 1;
 684                         free(msg);
 685                 }
 686         }
 687
 688         /*
 689          * Process client-side list participations for this room
 690          */
 691         instr_len = SIZ;
 692         if (sc->participates != NULL) {
 693                 msg = CtdlFetchMessage(msgnum, 1);
 694                 if (msg != NULL) {
 695
 696                         /* Only send messages which originated on our own Citadel
 697                          * network, otherwise we'll end up sending the remote
 698                          * mailing list's messages back to it, which is rude...
 699                          */
 700                         ok_to_participate = 0;
 701                         if (msg->cm_fields['N'] != NULL) {
 702                                 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
 703                                         ok_to_participate = 1;
 704                                 }
 705                                 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
 706                                         ok_to_participate = 1;
 707                                 }
 708                         }
 709                         if (ok_to_participate) {
 710                                 if (msg->cm_fields['F'] != NULL) {
 711                                         free(msg->cm_fields['F']);
 712                                 }
 713                                 msg->cm_fields['F'] = malloc(SIZ);
 714                                 /* Replace the Internet email address of the actual
 715                                 * author with the email address of the room itself,
 716                                 * so the remote listserv doesn't reject us.
 717                                 * FIXME ... I want to be able to pick any address
 718                                 */
 719                                 snprintf(msg->cm_fields['F'], SIZ,
 720                                         "room_%s@%s", CC->room.QRname,
 721                                         config.c_fqdn);
 722                                 for (i=0; msg->cm_fields['F'][i]; ++i) {
 723                                         if (isspace(msg->cm_fields['F'][i])) {
 724                                                 msg->cm_fields['F'][i] = '_';
 725                                         }
 726                                 }
 727
 728                                 /*
 729                                  * Figure out how big a buffer we need to allocate
 730                                  */
 731                                 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
 732
 733                                         if (msg->cm_fields['R'] == NULL) {
 734                                                 free(msg->cm_fields['R']);
 735                                         }
 736                                         msg->cm_fields['R'] = strdup(nptr->name);
 737
 738                                         valid = validate_recipients(nptr->name, NULL, 0);
 739                                         CtdlSubmitMsg(msg, valid, "");
 740                                         free_recipients(valid);
 741                                 }
 742
 743                         }
 744                         CtdlFreeMessage(msg);
 745                 }
 746         }
 747
 748         /*
 749          * Process IGnet push shares
 750          */
 751         msg = CtdlFetchMessage(msgnum, 1);
 752         if (msg != NULL) {
 753                 size_t newpath_len;
 754
 755                 /* Prepend our node name to the Path field whenever
 756                  * sending a message to another IGnet node
 757                  */
 758                 if (msg->cm_fields['P'] == NULL) {
 759                         msg->cm_fields['P'] = strdup("username");
 760                 }
 761                 newpath_len = strlen(msg->cm_fields['P']) +
 762                          strlen(config.c_nodename) + 2;
 763                 newpath = malloc(newpath_len);
 764                 snprintf(newpath, newpath_len, "%s!%s",
 765                          config.c_nodename, msg->cm_fields['P']);
 766                 free(msg->cm_fields['P']);
 767                 msg->cm_fields['P'] = newpath;
 768
 769                 /*
 770                  * Determine if this message is set to be deleted
 771                  * after sending out on the network
 772                  */
 773                 if (msg->cm_fields['S'] != NULL) {
 774                         if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
 775                                 delete_after_send = 1;
 776                         }
 777                 }
 778
 779                 /* Now send it to every node */
 780                 if (sc->ignet_push_shares != NULL)
 781                   for (mptr = sc->ignet_push_shares; mptr != NULL;
 782                     mptr = mptr->next) {
 783
 784                         send = 1;
 785
 786                         /* Check for valid node name */
 787                         if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
 788                                 lprintf(CTDL_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
 789                                 send = 0;
 790                         }
 791
 792                         /* Check for split horizon */
 793                         lprintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
 794                         bang = num_tokens(msg->cm_fields['P'], '!');
 795                         if (bang > 1) for (i=0; i<(bang-1); ++i) {
 796                                 extract_token(buf, msg->cm_fields['P'],
 797                                         i, '!', sizeof buf);
 798                                 if (!strcasecmp(buf, mptr->remote_nodename)) {
 799                                         send = 0;
 800                                 }
 801                         }
 802
 803                         /* Send the message */
 804                         if (send == 1) {
 805
 806                                 /*
 807                                  * Force the message to appear in the correct room
 808                                  * on the far end by setting the C field correctly
 809                                  */
 810                                 if (msg->cm_fields['C'] != NULL) {
 811                                         free(msg->cm_fields['C']);
 812                                 }
 813                                 if (!IsEmptyStr(mptr->remote_roomname)) {
 814                                         msg->cm_fields['C'] = strdup(mptr->remote_roomname);
 815                                 }
 816                                 else {
 817                                         msg->cm_fields['C'] = strdup(CC->room.QRname);
 818                                 }
 819
 820                                 /* serialize it for transmission */
 821                                 serialize_message(&sermsg, msg);
 822                                 if (sermsg.len > 0) {
 823
 824                                         /* write it to the spool file */
 825                                         snprintf(filename, sizeof filename,"%s/%s",
 826                                                         ctdl_netout_dir,
 827                                                         mptr->remote_nodename);
 828                                         lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
 829                                         fp = fopen(filename, "ab");
 830                                         if (fp != NULL) {
 831                                                 fwrite(sermsg.ser,
 832                                                         sermsg.len, 1, fp);
 833                                                 fclose(fp);
 834                                         }
 835                                         else {
 836                                                 lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
 837                                         }
 838
 839                                         /* free the serialized version */
 840                                         free(sermsg.ser);
 841                                 }
 842
 843                         }
 844                 }
 845                 CtdlFreeMessage(msg);
 846         }
 847
 848         /* update lastsent */
 849         sc->lastsent = msgnum;
 850
 851         /* Delete this message if delete-after-send is set */
 852         if (delete_after_send) {
 853                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 854         }
 855
 856 }
 857
 858
 859 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 860 {
 861         FILE *fp;
 862         char instr[SIZ];
 863         char buf[SIZ];
 864         char nodename[256];
 865         char roomname[ROOMNAMELEN];
 866         char nexthop[256];
 867         size_t miscsize = 0;
 868         size_t linesize = 0;
 869         int skipthisline = 0;
 870         namelist *nptr = NULL;
 871         maplist *mptr = NULL;
 872         SpoolControl *sc;
 873
 874         fp = fopen(filename, "r");
 875         if (fp == NULL) {
 876                 return 0;
 877         }
 878         sc = malloc(sizeof(SpoolControl));
 879         memset(sc, 0, sizeof(SpoolControl));
 880         *scc = sc;
 881
 882         while (fgets(buf, sizeof buf, fp) != NULL) {
 883                 buf[strlen(buf)-1] = 0;
 884
 885                 extract_token(instr, buf, 0, '|', sizeof instr);
 886                 if (!strcasecmp(instr, "lastsent")) {
 887                         sc->lastsent = extract_long(buf, 1);
 888                 }
 889                 else if (!strcasecmp(instr, "listrecp")) {
 890                         nptr = (namelist *)
 891                                 malloc(sizeof(namelist));
 892                         nptr->next = sc->listrecps;
 893                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 894                         sc->listrecps = nptr;
 895                 }
 896                 else if (!strcasecmp(instr, "participate")) {
 897                         nptr = (namelist *)
 898                                 malloc(sizeof(namelist));
 899                         nptr->next = sc->participates;
 900                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 901                         sc->participates = nptr;
 902                 }
 903                 else if (!strcasecmp(instr, "digestrecp")) {
 904                         nptr = (namelist *)
 905                                 malloc(sizeof(namelist));
 906                         nptr->next = sc->digestrecps;
 907                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 908                         sc->digestrecps = nptr;
 909                 }
 910                 else if (!strcasecmp(instr, "ignet_push_share")) {
 911                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 912                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 913                         mptr = (maplist *) malloc(sizeof(maplist));
 914                         mptr->next = sc->ignet_push_shares;
 915                         strcpy(mptr->remote_nodename, nodename);
 916                         strcpy(mptr->remote_roomname, roomname);
 917                         sc->ignet_push_shares = mptr;
 918                 }
 919                 else {
 920                         /* Preserve 'other' lines ... *unless* they happen to
 921                          * be subscribe/unsubscribe pendings with expired
 922                          * timestamps.
 923                          */
 924                         skipthisline = 0;
 925                         if (!strncasecmp(buf, "subpending|", 11)) {
 926                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 927                                         skipthisline = 1;
 928                                 }
 929                         }
 930                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 931                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 932                                         skipthisline = 1;
 933                                 }
 934                         }
 935
 936                         if (skipthisline == 0) {
 937                                 linesize = strlen(buf);
 938                                 sc->misc = realloc(sc->misc,
 939                                         (miscsize + linesize + 2) );
 940                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 941                                 miscsize = miscsize + linesize + 1;
 942                         }
 943                 }
 944
 945
 946         }
 947         fclose(fp);
 948         return 1;
 949 }
 950
 951 void free_spoolcontrol_struct(SpoolControl **scc)
 952 {
 953         SpoolControl *sc;
 954         namelist *nptr = NULL;
 955         maplist *mptr = NULL;
 956
 957         sc = *scc;
 958         while (sc->listrecps != NULL) {
 959                 nptr = sc->listrecps->next;
 960                 free(sc->listrecps);
 961                 sc->listrecps = nptr;
 962         }
 963         /* Do the same for digestrecps */
 964         while (sc->digestrecps != NULL) {
 965                 nptr = sc->digestrecps->next;
 966                 free(sc->digestrecps);
 967                 sc->digestrecps = nptr;
 968         }
 969         /* Do the same for participates */
 970         while (sc->participates != NULL) {
 971                 nptr = sc->participates->next;
 972                 free(sc->participates);
 973                 sc->participates = nptr;
 974         }
 975         while (sc->ignet_push_shares != NULL) {
 976                 mptr = sc->ignet_push_shares->next;
 977                 free(sc->ignet_push_shares);
 978                 sc->ignet_push_shares = mptr;
 979         }
 980         free(sc->misc);
 981         free(sc);
 982         *scc=NULL;
 983 }
 984
 985 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 986 {
 987         FILE *fp;
 988         SpoolControl *sc;
 989         namelist *nptr = NULL;
 990         maplist *mptr = NULL;
 991
 992         sc = *scc;
 993         fp = fopen(filename, "w");
 994         if (fp == NULL) {
 995                 lprintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
 996                         filename, strerror(errno));
 997                 free_spoolcontrol_struct(scc);
 998         }
 999         else {
1000                 fprintf(fp, "lastsent|%ld\n", sc->lastsent);
1001
1002                 /* Write out the listrecps while freeing from memory at the
1003                  * same time.  Am I clever or what?  :)
1004                  */
1005                 while (sc->listrecps != NULL) {
1006                         fprintf(fp, "listrecp|%s\n", sc->listrecps->name);
1007                         nptr = sc->listrecps->next;
1008                         free(sc->listrecps);
1009                         sc->listrecps = nptr;
1010                 }
1011                 /* Do the same for digestrecps */
1012                 while (sc->digestrecps != NULL) {
1013                         fprintf(fp, "digestrecp|%s\n", sc->digestrecps->name);
1014                         nptr = sc->digestrecps->next;
1015                         free(sc->digestrecps);
1016                         sc->digestrecps = nptr;
1017                 }
1018                 /* Do the same for participates */
1019                 while (sc->participates != NULL) {
1020                         fprintf(fp, "participate|%s\n", sc->participates->name);
1021                         nptr = sc->participates->next;
1022                         free(sc->participates);
1023                         sc->participates = nptr;
1024                 }
1025                 while (sc->ignet_push_shares != NULL) {
1026                         fprintf(fp, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1027                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1028                                 fprintf(fp, "|%s", sc->ignet_push_shares->remote_roomname);
1029                         }
1030                         fprintf(fp, "\n");
1031                         mptr = sc->ignet_push_shares->next;
1032                         free(sc->ignet_push_shares);
1033                         sc->ignet_push_shares = mptr;
1034                 }
1035                 if (sc->misc != NULL) {
1036                         fwrite(sc->misc, strlen(sc->misc), 1, fp);
1037                 }
1038                 free(sc->misc);
1039
1040                 fclose(fp);
1041                 free(sc);
1042                 *scc=NULL;
1043         }
1044         return 1;
1045 }
1046 int is_recipient(SpoolControl *sc, const char *Name)
1047 {
1048         namelist *nptr;
1049         size_t len;
1050
1051         len = strlen(Name);
1052         nptr = sc->listrecps;
1053         while (nptr != NULL) {
1054                 if (strncmp(Name, nptr->name, len)==0)
1055                         return 1;
1056                 nptr = nptr->next;
1057         }
1058         /* Do the same for digestrecps */
1059         nptr = sc->digestrecps;
1060         while (nptr != NULL) {
1061                 if (strncmp(Name, nptr->name, len)==0)
1062                         return 1;
1063                 nptr = nptr->next;
1064         }
1065         /* Do the same for participates */
1066         nptr = sc->participates;
1067         while (nptr != NULL) {
1068                 if (strncmp(Name, nptr->name, len)==0)
1069                         return 1;
1070                 nptr = nptr->next;
1071         }
1072         return 0;
1073 }
1074
1075
1076 /*
1077  * Batch up and send all outbound traffic from the current room
1078  */
1079 void network_spoolout_room(char *room_to_spool) {
1080         char buf[SIZ];
1081         char filename[SIZ];
1082         SpoolControl *sc;
1083         int i;
1084
1085         /*
1086          * If the room doesn't exist, don't try to perform its networking tasks.
1087          * Normally this should never happen, but once in a while maybe a room gets
1088          * queued for networking and then deleted before it can happen.
1089          */
1090         if (getroom(&CC->room, room_to_spool) != 0) {
1091                 lprintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1092                 return;
1093         }
1094
1095         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1096
1097         lprintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
1098         begin_critical_section(S_NETCONFIGS);
1099
1100         /* Only do net processing for rooms that have netconfigs */
1101
1102         if (!read_spoolcontrol_file(&sc, filename))
1103         {
1104                 end_critical_section(S_NETCONFIGS);
1105                 return;
1106         }
1107
1108         /* If there are digest recipients, we have to build a digest */
1109         if (sc->digestrecps != NULL) {
1110                 sc->digestfp = tmpfile();
1111                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1112         }
1113
1114         /* Do something useful */
1115         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1116                 network_spool_msg, sc);
1117
1118         /* If we wrote a digest, deliver it and then close it */
1119         snprintf(buf, sizeof buf, "room_%s@%s",
1120                 CC->room.QRname, config.c_fqdn);
1121         for (i=0; buf[i]; ++i) {
1122                 buf[i] = tolower(buf[i]);
1123                 if (isspace(buf[i])) buf[i] = '_';
1124         }
1125         if (sc->digestfp != NULL) {
1126                 fprintf(sc->digestfp,   " -----------------------------------"
1127                                         "------------------------------------"
1128                                         "-------\n"
1129                                         "You are subscribed to the '%s' "
1130                                         "list.\n"
1131                                         "To post to the list: %s\n",
1132                                         CC->room.QRname, buf
1133                 );
1134                 network_deliver_digest(sc);     /* deliver and close */
1135         }
1136
1137         /* Now rewrite the config file */
1138         writenfree_spoolcontrol_file (&sc, filename);
1139         end_critical_section(S_NETCONFIGS);
1140 }
1141
1142
1143
1144 /*
1145  * Send the *entire* contents of the current room to one specific network node,
1146  * ignoring anything we know about which messages have already undergone
1147  * network processing.  This can be used to bring a new node into sync.
1148  */
1149 int network_sync_to(char *target_node) {
1150         SpoolControl sc;
1151         int num_spooled = 0;
1152         int found_node = 0;
1153         char buf[256];
1154         char sc_type[256];
1155         char sc_node[256];
1156         char sc_room[256];
1157         char filename[256];
1158         FILE *fp;
1159
1160         /* Grab the configuration line we're looking for */
1161         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1162         begin_critical_section(S_NETCONFIGS);
1163         fp = fopen(filename, "r");
1164         if (fp == NULL) {
1165                 end_critical_section(S_NETCONFIGS);
1166                 return(-1);
1167         }
1168         while (fgets(buf, sizeof buf, fp) != NULL) {
1169                 buf[strlen(buf)-1] = 0;
1170                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1171                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1172                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1173                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1174                    && (!strcasecmp(sc_node, target_node)) ) {
1175                         found_node = 1;
1176
1177                         /* Concise syntax because we don't need a full linked-list */
1178                         memset(&sc, 0, sizeof(SpoolControl));
1179                         sc.ignet_push_shares = (maplist *)
1180                                 malloc(sizeof(maplist));
1181                         sc.ignet_push_shares->next = NULL;
1182                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1183                                 sc_node,
1184                                 sizeof sc.ignet_push_shares->remote_nodename);
1185                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1186                                 sc_room,
1187                                 sizeof sc.ignet_push_shares->remote_roomname);
1188                 }
1189         }
1190         fclose(fp);
1191         end_critical_section(S_NETCONFIGS);
1192
1193         if (!found_node) return(-1);
1194
1195         /* Send ALL messages */
1196         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1197                 network_spool_msg, &sc);
1198
1199         /* Concise cleanup because we know there's only one node in the sc */
1200         free(sc.ignet_push_shares);
1201
1202         lprintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1203                 num_spooled, target_node);
1204         return(num_spooled);
1205 }
1206
1207
1208 /*
1209  * Implements the NSYN command
1210  */
1211 void cmd_nsyn(char *argbuf) {
1212         int num_spooled;
1213         char target_node[256];
1214
1215         if (CtdlAccessCheck(ac_aide)) return;
1216
1217         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1218         num_spooled = network_sync_to(target_node);
1219         if (num_spooled >= 0) {
1220                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1221         }
1222         else {
1223                 cprintf("%d No such room/node share exists.\n",
1224                         ERROR + ROOM_NOT_FOUND);
1225         }
1226 }
1227
1228
1229
1230 /*
1231  * Batch up and send all outbound traffic from the current room
1232  */
1233 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1234         struct RoomProcList *ptr;
1235
1236         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1237         if (ptr == NULL) return;
1238
1239         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1240         begin_critical_section(S_RPLIST);
1241         ptr->next = rplist;
1242         rplist = ptr;
1243         end_critical_section(S_RPLIST);
1244 }
1245
1246 void destroy_network_queue_room(void)
1247 {
1248         struct RoomProcList *cur, *p;
1249         NetMap *nmcur, *nmp;
1250
1251         cur = rplist;
1252         begin_critical_section(S_RPLIST);
1253         while (cur != NULL)
1254         {
1255                 p = cur->next;
1256                 free (cur);
1257                 cur = p;
1258         }
1259         rplist = NULL;
1260         end_critical_section(S_RPLIST);
1261
1262         nmcur = the_netmap;
1263         while (nmcur != NULL)
1264         {
1265                 nmp = nmcur->next;
1266                 free (nmcur);
1267                 nmcur = nmp;
1268         }
1269         the_netmap = NULL;
1270         if (working_ignetcfg != NULL)
1271                 free (working_ignetcfg);
1272         working_ignetcfg = NULL;
1273 }
1274
1275
1276 /*
1277  * Learn topology from path fields
1278  */
1279 void network_learn_topology(char *node, char *path) {
1280         char nexthop[256];
1281         NetMap *nmptr;
1282
1283         strcpy(nexthop, "");
1284
1285         if (num_tokens(path, '!') < 3) return;
1286         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1287                 if (!strcasecmp(nmptr->nodename, node)) {
1288                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1289                         nmptr->lastcontact = time(NULL);
1290                         ++netmap_changed;
1291                         return;
1292                 }
1293         }
1294
1295         /* If we got here then it's not in the map, so add it. */
1296         nmptr = (NetMap *) malloc(sizeof (NetMap));
1297         strcpy(nmptr->nodename, node);
1298         nmptr->lastcontact = time(NULL);
1299         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1300         nmptr->next = the_netmap;
1301         the_netmap = nmptr;
1302         ++netmap_changed;
1303 }
1304
1305
1306
1307
1308 /*
1309  * Bounce a message back to the sender
1310  */
1311 void network_bounce(struct CtdlMessage *msg, char *reason) {
1312         char *oldpath = NULL;
1313         char buf[SIZ];
1314         char bouncesource[SIZ];
1315         char recipient[SIZ];
1316         struct recptypes *valid = NULL;
1317         char force_room[ROOMNAMELEN];
1318         static int serialnum = 0;
1319         size_t size;
1320
1321         lprintf(CTDL_DEBUG, "entering network_bounce()\n");
1322
1323         if (msg == NULL) return;
1324
1325         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1326
1327         /*
1328          * Give it a fresh message ID
1329          */
1330         if (msg->cm_fields['I'] != NULL) {
1331                 free(msg->cm_fields['I']);
1332         }
1333         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1334                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1335         msg->cm_fields['I'] = strdup(buf);
1336
1337         /*
1338          * FIXME ... right now we're just sending a bounce; we really want to
1339          * include the text of the bounced message.
1340          */
1341         if (msg->cm_fields['M'] != NULL) {
1342                 free(msg->cm_fields['M']);
1343         }
1344         msg->cm_fields['M'] = strdup(reason);
1345         msg->cm_format_type = 0;
1346
1347         /*
1348          * Turn the message around
1349          */
1350         if (msg->cm_fields['R'] == NULL) {
1351                 free(msg->cm_fields['R']);
1352         }
1353
1354         if (msg->cm_fields['D'] == NULL) {
1355                 free(msg->cm_fields['D']);
1356         }
1357
1358         snprintf(recipient, sizeof recipient, "%s@%s",
1359                 msg->cm_fields['A'], msg->cm_fields['N']);
1360
1361         if (msg->cm_fields['A'] == NULL) {
1362                 free(msg->cm_fields['A']);
1363         }
1364
1365         if (msg->cm_fields['N'] == NULL) {
1366                 free(msg->cm_fields['N']);
1367         }
1368
1369         if (msg->cm_fields['U'] == NULL) {
1370                 free(msg->cm_fields['U']);
1371         }
1372
1373         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1374         msg->cm_fields['N'] = strdup(config.c_nodename);
1375         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
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", config.c_nodename, oldpath);
1388         free(oldpath);
1389
1390         /* Now submit the message */
1391         valid = validate_recipients(recipient, NULL, 0);
1392         if (valid != NULL) if (valid->num_error != 0) {
1393                 free_recipients(valid);
1394                 valid = NULL;
1395         }
1396         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1397                 strcpy(force_room, config.c_aideroom);
1398         }
1399         else {
1400                 strcpy(force_room, "");
1401         }
1402         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1403                 strcpy(force_room, config.c_aideroom);
1404         }
1405         CtdlSubmitMsg(msg, valid, force_room);
1406
1407         /* Clean up */
1408         if (valid != NULL) free_recipients(valid);
1409         CtdlFreeMessage(msg);
1410         lprintf(CTDL_DEBUG, "leaving network_bounce()\n");
1411 }
1412
1413
1414
1415
1416 /*
1417  * Process a buffer containing a single message from a single file
1418  * from the inbound queue
1419  */
1420 void network_process_buffer(char *buffer, long size) {
1421         struct CtdlMessage *msg = NULL;
1422         long pos;
1423         int field;
1424         struct recptypes *recp = NULL;
1425         char target_room[ROOMNAMELEN];
1426         struct ser_ret sermsg;
1427         char *oldpath = NULL;
1428         char filename[SIZ];
1429         FILE *fp;
1430         char nexthop[SIZ];
1431         unsigned char firstbyte;
1432         unsigned char lastbyte;
1433
1434         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
1435         firstbyte = buffer[0];
1436         lastbyte = buffer[size-1];
1437         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1438                 lprintf(CTDL_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
1439                         size, firstbyte, lastbyte);
1440                 return;
1441         }
1442
1443         /* Set default target room to trash */
1444         strcpy(target_room, TWITROOM);
1445
1446         /* Load the message into memory */
1447         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1448         memset(msg, 0, sizeof(struct CtdlMessage));
1449         msg->cm_magic = CTDLMESSAGE_MAGIC;
1450         msg->cm_anon_type = buffer[1];
1451         msg->cm_format_type = buffer[2];
1452
1453         for (pos = 3; pos < size; ++pos) {
1454                 field = buffer[pos];
1455                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1456                 pos = pos + strlen(&buffer[(int)pos]);
1457         }
1458
1459         /* Check for message routing */
1460         if (msg->cm_fields['D'] != NULL) {
1461                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1462
1463                         /* route the message */
1464                         strcpy(nexthop, "");
1465                         if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1466                                 /* prepend our node to the path */
1467                                 if (msg->cm_fields['P'] != NULL) {
1468                                         oldpath = msg->cm_fields['P'];
1469                                         msg->cm_fields['P'] = NULL;
1470                                 }
1471                                 else {
1472                                         oldpath = strdup("unknown_user");
1473                                 }
1474                                 size = strlen(oldpath) + SIZ;
1475                                 msg->cm_fields['P'] = malloc(size);
1476                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1477                                         config.c_nodename, oldpath);
1478                                 free(oldpath);
1479
1480                                 /* serialize the message */
1481                                 serialize_message(&sermsg, msg);
1482
1483                                 /* now send it */
1484                                 if (IsEmptyStr(nexthop)) {
1485                                         strcpy(nexthop, msg->cm_fields['D']);
1486                                 }
1487                                 snprintf(filename,
1488                                                  sizeof filename,
1489                                                  "%s/%s",
1490                                                  ctdl_netout_dir,
1491                                                  nexthop);
1492                                 lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
1493                                 fp = fopen(filename, "ab");
1494                                 if (fp != NULL) {
1495                                         fwrite(sermsg.ser,
1496                                                 sermsg.len, 1, fp);
1497                                         fclose(fp);
1498                                 }
1499                                 else {
1500                                         lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1501                                 }
1502                                 free(sermsg.ser);
1503                                 CtdlFreeMessage(msg);
1504                                 return;
1505                         }
1506
1507                         else {  /* invalid destination node name */
1508
1509                                 network_bounce(msg,
1510 "A message you sent could not be delivered due to an invalid destination node"
1511 " name.  Please check the address and try sending the message again.\n");
1512                                 msg = NULL;
1513                                 return;
1514
1515                         }
1516                 }
1517         }
1518
1519         /*
1520          * Check to see if we already have a copy of this message, and
1521          * abort its processing if so.  (We used to post a warning to Aide>
1522          * every time this happened, but the network is now so densely
1523          * connected that it's inevitable.)
1524          */
1525         if (network_usetable(msg) != 0) {
1526                 CtdlFreeMessage(msg);
1527                 return;
1528         }
1529
1530         /* Learn network topology from the path */
1531         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1532                 network_learn_topology(msg->cm_fields['N'],
1533                                         msg->cm_fields['P']);
1534         }
1535
1536         /* Is the sending node giving us a very persuasive suggestion about
1537          * which room this message should be saved in?  If so, go with that.
1538          */
1539         if (msg->cm_fields['C'] != NULL) {
1540                 safestrncpy(target_room,
1541                         msg->cm_fields['C'],
1542                         sizeof target_room);
1543         }
1544
1545         /* Otherwise, does it have a recipient?  If so, validate it... */
1546         else if (msg->cm_fields['R'] != NULL) {
1547                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1548                 if (recp != NULL) if (recp->num_error != 0) {
1549                         network_bounce(msg,
1550                                 "A message you sent could not be delivered due to an invalid address.\n"
1551                                 "Please check the address and try sending the message again.\n");
1552                         msg = NULL;
1553                         free_recipients(recp);
1554                         return;
1555                 }
1556                 strcpy(target_room, "");        /* no target room if mail */
1557         }
1558
1559         /* Our last shot at finding a home for this message is to see if
1560          * it has the O field (Originating room) set.
1561          */
1562         else if (msg->cm_fields['O'] != NULL) {
1563                 safestrncpy(target_room,
1564                         msg->cm_fields['O'],
1565                         sizeof target_room);
1566         }
1567
1568         /* Strip out fields that are only relevant during transit */
1569         if (msg->cm_fields['D'] != NULL) {
1570                 free(msg->cm_fields['D']);
1571                 msg->cm_fields['D'] = NULL;
1572         }
1573         if (msg->cm_fields['C'] != NULL) {
1574                 free(msg->cm_fields['C']);
1575                 msg->cm_fields['C'] = NULL;
1576         }
1577
1578         /* save the message into a room */
1579         if (PerformNetprocHooks(msg, target_room) == 0) {
1580                 msg->cm_flags = CM_SKIP_HOOKS;
1581                 CtdlSubmitMsg(msg, recp, target_room);
1582         }
1583         CtdlFreeMessage(msg);
1584         free_recipients(recp);
1585 }
1586
1587
1588 /*
1589  * Process a single message from a single file from the inbound queue
1590  */
1591 void network_process_message(FILE *fp, long msgstart, long msgend) {
1592         long hold_pos;
1593         long size;
1594         char *buffer;
1595
1596         hold_pos = ftell(fp);
1597         size = msgend - msgstart + 1;
1598         buffer = malloc(size);
1599         if (buffer != NULL) {
1600                 fseek(fp, msgstart, SEEK_SET);
1601                 fread(buffer, size, 1, fp);
1602                 network_process_buffer(buffer, size);
1603                 free(buffer);
1604         }
1605
1606         fseek(fp, hold_pos, SEEK_SET);
1607 }
1608
1609
1610 /*
1611  * Process a single file from the inbound queue
1612  */
1613 void network_process_file(char *filename) {
1614         FILE *fp;
1615         long msgstart = (-1L);
1616         long msgend = (-1L);
1617         long msgcur = 0L;
1618         int ch;
1619
1620
1621         fp = fopen(filename, "rb");
1622         if (fp == NULL) {
1623                 lprintf(CTDL_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1624                 return;
1625         }
1626
1627         fseek(fp, 0L, SEEK_END);
1628         lprintf(CTDL_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1629         rewind(fp);
1630
1631         /* Look for messages in the data stream and break them out */
1632         while (ch = getc(fp), ch >= 0) {
1633
1634                 if (ch == 255) {
1635                         if (msgstart >= 0L) {
1636                                 msgend = msgcur - 1;
1637                                 network_process_message(fp, msgstart, msgend);
1638                         }
1639                         msgstart = msgcur;
1640                 }
1641
1642                 ++msgcur;
1643         }
1644
1645         msgend = msgcur - 1;
1646         if (msgstart >= 0L) {
1647                 network_process_message(fp, msgstart, msgend);
1648         }
1649
1650         fclose(fp);
1651         unlink(filename);
1652 }
1653
1654
1655 /*
1656  * Process anything in the inbound queue
1657  */
1658 void network_do_spoolin(void) {
1659         DIR *dp;
1660         struct dirent *d;
1661         struct stat statbuf;
1662         char filename[256];
1663         static time_t last_spoolin_mtime = 0L;
1664
1665         /*
1666          * Check the spoolin directory's modification time.  If it hasn't
1667          * been touched, we don't need to scan it.
1668          */
1669         if (stat(ctdl_netin_dir, &statbuf)) return;
1670         if (statbuf.st_mtime == last_spoolin_mtime) {
1671                 lprintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1672                 return;
1673         }
1674         last_spoolin_mtime = statbuf.st_mtime;
1675         lprintf(CTDL_DEBUG, "network: processing inbound queue\n");
1676
1677         /*
1678          * Ok, there's something interesting in there, so scan it.
1679          */
1680         dp = opendir(ctdl_netin_dir);
1681         if (dp == NULL) return;
1682
1683         while (d = readdir(dp), d != NULL) {
1684                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1685                         snprintf(filename,
1686                                          sizeof filename,
1687                                          "%s/%s",
1688                                          ctdl_netin_dir,
1689                                          d->d_name);
1690                         network_process_file(filename);
1691                 }
1692         }
1693
1694         closedir(dp);
1695 }
1696
1697 /*
1698  * Delete any files in the outbound queue that were intended
1699  * to be sent to nodes which no longer exist.
1700  */
1701 void network_purge_spoolout(void) {
1702         DIR *dp;
1703         struct dirent *d;
1704         char filename[256];
1705         char nexthop[256];
1706         int i;
1707
1708         dp = opendir(ctdl_netout_dir);
1709         if (dp == NULL) return;
1710
1711         while (d = readdir(dp), d != NULL) {
1712                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1713                         continue;
1714                 snprintf(filename,
1715                                  sizeof filename,
1716                                  "%s/%s",
1717                                  ctdl_netout_dir,
1718                                  d->d_name);
1719
1720                 strcpy(nexthop, "");
1721                 i = is_valid_node(nexthop, NULL, d->d_name);
1722
1723                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1724                         unlink(filename);
1725                 }
1726         }
1727
1728
1729         closedir(dp);
1730 }
1731
1732
1733 /*
1734  * receive network spool from the remote system
1735  */
1736 void receive_spool(int sock, char *remote_nodename) {
1737         long download_len = 0L;
1738         long bytes_received = 0L;
1739         long bytes_copied = 0L;
1740         char buf[SIZ];
1741         static char pbuf[IGNET_PACKET_SIZE];
1742         char tempfilename[PATH_MAX];
1743         char filename[PATH_MAX];
1744         long plen;
1745         FILE *fp, *newfp;
1746
1747         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
1748         if (sock_puts(sock, "NDOP") < 0) return;
1749         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1750         lprintf(CTDL_DEBUG, "<%s\n", buf);
1751         if (buf[0] != '2') {
1752                 return;
1753         }
1754         download_len = extract_long(&buf[4], 0);
1755
1756         bytes_received = 0L;
1757         fp = fopen(tempfilename, "w");
1758         if (fp == NULL) {
1759                 lprintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1760                         strerror(errno));
1761                 return;
1762         }
1763
1764         while (bytes_received < download_len) {
1765                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1766                         bytes_received,
1767                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1768                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1769                 if (sock_puts(sock, buf) < 0) {
1770                         fclose(fp);
1771                         unlink(tempfilename);
1772                         return;
1773                 }
1774                 if (sock_getln(sock, buf, sizeof buf) < 0) {
1775                         fclose(fp);
1776                         unlink(tempfilename);
1777                         return;
1778                 }
1779                 if (buf[0] == '6') {
1780                         plen = extract_long(&buf[4], 0);
1781                         if (sock_read(sock, pbuf, plen, 1) < 0) {
1782                                 fclose(fp);
1783                                 unlink(tempfilename);
1784                                 return;
1785                         }
1786                         fwrite((char *) pbuf, plen, 1, fp);
1787                         bytes_received = bytes_received + plen;
1788                 }
1789         }
1790
1791         fclose(fp);
1792         if (sock_puts(sock, "CLOS") < 0) {
1793                 unlink(tempfilename);
1794                 return;
1795         }
1796         if (sock_getln(sock, buf, sizeof buf) < 0) {
1797                 unlink(tempfilename);
1798                 return;
1799         }
1800         if (download_len > 0) {
1801                 lprintf(CTDL_NOTICE, "Received %ld octets from <%s>\n", download_len, remote_nodename);
1802         }
1803         lprintf(CTDL_DEBUG, "%s\n", buf);
1804
1805         /* Now copy the temp file to its permanent location.
1806          * (We copy instead of link because they may be on different filesystems)
1807          */
1808         begin_critical_section(S_NETSPOOL);
1809         snprintf(filename,
1810                          sizeof filename,
1811                          "%s/%s.%ld",
1812                          ctdl_netin_dir,
1813                          remote_nodename,
1814                          (long) getpid()
1815         );
1816         fp = fopen(tempfilename, "r");
1817         if (fp != NULL) {
1818                 newfp = fopen(filename, "w");
1819                 if (newfp != NULL) {
1820                         bytes_copied = 0L;
1821                         while (bytes_copied < download_len) {
1822                                 plen = download_len - bytes_copied;
1823                                 if (plen > sizeof buf) {
1824                                         plen = sizeof buf;
1825                                 }
1826                                 fread(buf, plen, 1, fp);
1827                                 fwrite(buf, plen, 1, newfp);
1828                                 bytes_copied += plen;
1829                         }
1830                         fclose(newfp);
1831                 }
1832                 fclose(fp);
1833         }
1834         end_critical_section(S_NETSPOOL);
1835         unlink(tempfilename);
1836 }
1837
1838
1839
1840 /*
1841  * transmit network spool to the remote system
1842  */
1843 void transmit_spool(int sock, char *remote_nodename)
1844 {
1845         char buf[SIZ];
1846         char pbuf[4096];
1847         long plen;
1848         long bytes_to_write, thisblock, bytes_written;
1849         int fd;
1850         char sfname[128];
1851
1852         if (sock_puts(sock, "NUOP") < 0) return;
1853         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1854         lprintf(CTDL_DEBUG, "<%s\n", buf);
1855         if (buf[0] != '2') {
1856                 return;
1857         }
1858
1859         snprintf(sfname, sizeof sfname,
1860                          "%s/%s",
1861                          ctdl_netout_dir,
1862                          remote_nodename);
1863         fd = open(sfname, O_RDONLY);
1864         if (fd < 0) {
1865                 if (errno != ENOENT) {
1866                         lprintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1867                                 strerror(errno));
1868                 }
1869                 return;
1870         }
1871         bytes_written = 0;
1872         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1873                 bytes_to_write = plen;
1874                 while (bytes_to_write > 0L) {
1875                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1876                         if (sock_puts(sock, buf) < 0) {
1877                                 close(fd);
1878                                 return;
1879                         }
1880                         if (sock_getln(sock, buf, sizeof buf) < 0) {
1881                                 close(fd);
1882                                 return;
1883                         }
1884                         thisblock = atol(&buf[4]);
1885                         if (buf[0] == '7') {
1886                                 if (sock_write(sock, pbuf,
1887                                    (int) thisblock) < 0) {
1888                                         close(fd);
1889                                         return;
1890                                 }
1891                                 bytes_to_write -= thisblock;
1892                                 bytes_written += thisblock;
1893                         } else {
1894                                 goto ABORTUPL;
1895                         }
1896                 }
1897         }
1898
1899 ABORTUPL:
1900         close(fd);
1901         if (sock_puts(sock, "UCLS 1") < 0) return;
1902         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1903         lprintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n",
1904                         bytes_written, remote_nodename);
1905         lprintf(CTDL_DEBUG, "<%s\n", buf);
1906         if (buf[0] == '2') {
1907                 lprintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
1908                 unlink(sfname);
1909         }
1910 }
1911
1912
1913
1914 /*
1915  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1916  */
1917 void network_poll_node(char *node, char *secret, char *host, char *port) {
1918         int sock;
1919         char buf[SIZ];
1920
1921         if (network_talking_to(node, NTT_CHECK)) return;
1922         network_talking_to(node, NTT_ADD);
1923         lprintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
1924
1925         sock = sock_connect(host, port, "tcp");
1926         if (sock < 0) {
1927                 lprintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
1928                 network_talking_to(node, NTT_REMOVE);
1929                 return;
1930         }
1931
1932         lprintf(CTDL_DEBUG, "Connected!\n");
1933
1934         /* Read the server greeting */
1935         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
1936         lprintf(CTDL_DEBUG, ">%s\n", buf);
1937
1938         /* Identify ourselves */
1939         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1940         lprintf(CTDL_DEBUG, "<%s\n", buf);
1941         if (sock_puts(sock, buf) <0) goto bail;
1942         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
1943         lprintf(CTDL_DEBUG, ">%s\n", buf);
1944         if (buf[0] != '2') goto bail;
1945
1946         /* At this point we are authenticated. */
1947         receive_spool(sock, node);
1948         transmit_spool(sock, node);
1949
1950         sock_puts(sock, "QUIT");
1951 bail:   sock_close(sock);
1952         network_talking_to(node, NTT_REMOVE);
1953 }
1954
1955
1956
1957 /*
1958  * Poll other Citadel nodes and transfer inbound/outbound network data.
1959  * Set "full" to nonzero to force a poll of every node, or to zero to poll
1960  * only nodes to which we have data to send.
1961  */
1962 void network_poll_other_citadel_nodes(int full_poll) {
1963         int i;
1964         char linebuf[256];
1965         char node[SIZ];
1966         char host[256];
1967         char port[256];
1968         char secret[256];
1969         int poll = 0;
1970         char spoolfile[256];
1971
1972         if (working_ignetcfg == NULL) {
1973                 lprintf(CTDL_DEBUG, "No nodes defined - not polling\n");
1974                 return;
1975         }
1976
1977         /* Use the string tokenizer to grab one line at a time */
1978         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
1979                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
1980                 extract_token(node, linebuf, 0, '|', sizeof node);
1981                 extract_token(secret, linebuf, 1, '|', sizeof secret);
1982                 extract_token(host, linebuf, 2, '|', sizeof host);
1983                 extract_token(port, linebuf, 3, '|', sizeof port);
1984                 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
1985                    && !IsEmptyStr(host) && !IsEmptyStr(port)) {
1986                         poll = full_poll;
1987                         if (poll == 0) {
1988                                 snprintf(spoolfile,
1989                                                  sizeof spoolfile,
1990                                                  "%s/%s",
1991                                                  ctdl_netout_dir,
1992                                                  node);
1993                                 if (access(spoolfile, R_OK) == 0) {
1994                                         poll = 1;
1995                                 }
1996                         }
1997                         if (poll) {
1998                                 network_poll_node(node, secret, host, port);
1999                         }
2000                 }
2001         }
2002
2003 }
2004
2005
2006
2007
2008 /*
2009  * It's ok if these directories already exist.  Just fail silently.
2010  */
2011 void create_spool_dirs(void) {
2012         mkdir(ctdl_spool_dir, 0700);
2013         chown(ctdl_spool_dir, CTDLUID, (-1));
2014         mkdir(ctdl_netin_dir, 0700);
2015         chown(ctdl_netin_dir, CTDLUID, (-1));
2016         mkdir(ctdl_netout_dir, 0700);
2017         chown(ctdl_netout_dir, CTDLUID, (-1));
2018 }
2019
2020
2021
2022
2023
2024 /*
2025  * network_do_queue()
2026  *
2027  * Run through the rooms doing various types of network stuff.
2028  */
2029 void *network_do_queue(void *args) {
2030         static time_t last_run = 0L;
2031         struct RoomProcList *ptr;
2032         int full_processing = 1;
2033
2034         /*
2035          * Run the full set of processing tasks no more frequently
2036          * than once every n seconds
2037          */
2038         if ( (time(NULL) - last_run) < config.c_net_freq ) {
2039                 full_processing = 0;
2040                 CtdlLogPrintf(CTDL_DEBUG, "Network full processing in %ld seconds.\n", config.c_net_freq - (time(NULL)- last_run));
2041         }
2042
2043         /*
2044          * This is a simple concurrency check to make sure only one queue run
2045          * is done at a time.  We could do this with a mutex, but since we
2046          * don't really require extremely fine granularity here, we'll do it
2047          * with a static variable instead.
2048          */
2049         if (doing_queue) return NULL;
2050         doing_queue = 1;
2051
2052         /* Load the IGnet Configuration into memory */
2053         load_working_ignetcfg();
2054
2055         /*
2056          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
2057          * then we poll everyone.  Otherwise we only poll nodes we have stuff
2058          * to send to.
2059          */
2060         network_poll_other_citadel_nodes(full_processing);
2061
2062         /*
2063          * Load the network map and filter list into memory.
2064          */
2065         read_network_map();
2066         filterlist = load_filter_list();
2067
2068         /*
2069          * Go ahead and run the queue
2070          */
2071         if (full_processing) {
2072                 lprintf(CTDL_DEBUG, "network: loading outbound queue\n");
2073                 ForEachRoom(network_queue_room, NULL);
2074         }
2075
2076         if (rplist != NULL) {
2077                 lprintf(CTDL_DEBUG, "network: running outbound queue\n");
2078                 while (rplist != NULL) {
2079                         char spoolroomname[ROOMNAMELEN];
2080                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2081                         begin_critical_section(S_RPLIST);
2082
2083                         /* pop this record off the list */
2084                         ptr = rplist;
2085                         rplist = rplist->next;
2086                         free(ptr);
2087
2088                         /* invalidate any duplicate entries to prevent double processing */
2089                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2090                                 if (!strcasecmp(ptr->name, spoolroomname)) {
2091                                         ptr->name[0] = 0;
2092                                 }
2093                         }
2094
2095                         end_critical_section(S_RPLIST);
2096                         if (spoolroomname[0] != 0) {
2097                                 network_spoolout_room(spoolroomname);
2098                         }
2099                 }
2100         }
2101
2102         /* If there is anything in the inbound queue, process it */
2103         network_do_spoolin();
2104
2105         /* Save the network map back to disk */
2106         write_network_map();
2107
2108         /* Free the filter list in memory */
2109         free_filter_list(filterlist);
2110         filterlist = NULL;
2111
2112         network_purge_spoolout();
2113
2114         lprintf(CTDL_DEBUG, "network: queue run completed\n");
2115
2116         if (full_processing) {
2117                 last_run = time(NULL);
2118         }
2119
2120         doing_queue = 0;
2121         CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, time(NULL) + 60);
2122         return NULL;
2123 }
2124
2125
2126 /*
2127  * cmd_netp() - authenticate to the server as another Citadel node polling
2128  *            for network traffic
2129  */
2130 void cmd_netp(char *cmdbuf)
2131 {
2132         char node[256];
2133         char pass[256];
2134         int v;
2135
2136         char secret[256];
2137         char nexthop[256];
2138
2139         /* Authenticate */
2140         extract_token(node, cmdbuf, 0, '|', sizeof node);
2141         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2142
2143         if (doing_queue) {
2144                 lprintf(CTDL_WARNING, "Network node <%s> refused - spooling", node);
2145                 cprintf("%d spooling - try again in a few minutes\n",
2146                         ERROR + RESOURCE_BUSY);
2147                 return;
2148         }
2149
2150         /* load the IGnet Configuration to check node validity */
2151         load_working_ignetcfg();
2152         v = is_valid_node(nexthop, secret, node);
2153
2154         if (v != 0) {
2155                 lprintf(CTDL_WARNING, "Unknown node <%s>\n", node);
2156                 cprintf("%d authentication failed\n",
2157                         ERROR + PASSWORD_REQUIRED);
2158                 return;
2159         }
2160
2161         if (strcasecmp(pass, secret)) {
2162                 lprintf(CTDL_WARNING, "Bad password for network node <%s>", node);
2163                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2164                 return;
2165         }
2166
2167         if (network_talking_to(node, NTT_CHECK)) {
2168                 lprintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2169                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2170                 return;
2171         }
2172
2173         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2174         network_talking_to(node, NTT_ADD);
2175         lprintf(CTDL_NOTICE, "Network node <%s> logged in\n", CC->net_node);
2176         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
2177                 CC->net_node);
2178 }
2179
2180 int network_room_handler (struct ctdlroom *room)
2181 {
2182         network_queue_room(room, NULL);
2183         return 0;
2184 }
2185
2186 /*
2187  * Module entry point
2188  */
2189 CTDL_MODULE_INIT(network)
2190 {
2191         if (!threading)
2192         {
2193                 create_spool_dirs();
2194                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2195                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2196                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2197                 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2198 //              CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
2199                 CtdlRegisterRoomHook(network_room_handler);
2200                 CtdlRegisterCleanupHook(destroy_network_queue_room);
2201         }
2202         else
2203                 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, 0);
2204         /* return our Subversion id for the Log */
2205         return "$Id$";
2206 }