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                 CtdlLogPrintf(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         CtdlLogPrintf(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) >= 0 && 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                 CtdlLogPrintf(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                 CtdlLogPrintf(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                                 CtdlLogPrintf(CTDL_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
 789                                 send = 0;
 790                         }
 791
 792                         /* Check for split horizon */
 793                         CtdlLogPrintf(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                                         CtdlLogPrintf(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                                                 CtdlLogPrintf(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         size_t miscsize = 0;
 867         size_t linesize = 0;
 868         int skipthisline = 0;
 869         namelist *nptr = NULL;
 870         maplist *mptr = NULL;
 871         SpoolControl *sc;
 872
 873         fp = fopen(filename, "r");
 874         if (fp == NULL) {
 875                 return 0;
 876         }
 877         sc = malloc(sizeof(SpoolControl));
 878         memset(sc, 0, sizeof(SpoolControl));
 879         *scc = sc;
 880
 881         while (fgets(buf, sizeof buf, fp) != NULL) {
 882                 buf[strlen(buf)-1] = 0;
 883
 884                 extract_token(instr, buf, 0, '|', sizeof instr);
 885                 if (!strcasecmp(instr, "lastsent")) {
 886                         sc->lastsent = extract_long(buf, 1);
 887                 }
 888                 else if (!strcasecmp(instr, "listrecp")) {
 889                         nptr = (namelist *)
 890                                 malloc(sizeof(namelist));
 891                         nptr->next = sc->listrecps;
 892                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 893                         sc->listrecps = nptr;
 894                 }
 895                 else if (!strcasecmp(instr, "participate")) {
 896                         nptr = (namelist *)
 897                                 malloc(sizeof(namelist));
 898                         nptr->next = sc->participates;
 899                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 900                         sc->participates = nptr;
 901                 }
 902                 else if (!strcasecmp(instr, "digestrecp")) {
 903                         nptr = (namelist *)
 904                                 malloc(sizeof(namelist));
 905                         nptr->next = sc->digestrecps;
 906                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 907                         sc->digestrecps = nptr;
 908                 }
 909                 else if (!strcasecmp(instr, "ignet_push_share")) {
 910                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 911                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 912                         mptr = (maplist *) malloc(sizeof(maplist));
 913                         mptr->next = sc->ignet_push_shares;
 914                         strcpy(mptr->remote_nodename, nodename);
 915                         strcpy(mptr->remote_roomname, roomname);
 916                         sc->ignet_push_shares = mptr;
 917                 }
 918                 else {
 919                         /* Preserve 'other' lines ... *unless* they happen to
 920                          * be subscribe/unsubscribe pendings with expired
 921                          * timestamps.
 922                          */
 923                         skipthisline = 0;
 924                         if (!strncasecmp(buf, "subpending|", 11)) {
 925                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 926                                         skipthisline = 1;
 927                                 }
 928                         }
 929                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 930                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 931                                         skipthisline = 1;
 932                                 }
 933                         }
 934
 935                         if (skipthisline == 0) {
 936                                 linesize = strlen(buf);
 937                                 sc->misc = realloc(sc->misc,
 938                                         (miscsize + linesize + 2) );
 939                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 940                                 miscsize = miscsize + linesize + 1;
 941                         }
 942                 }
 943
 944
 945         }
 946         fclose(fp);
 947         return 1;
 948 }
 949
 950 void free_spoolcontrol_struct(SpoolControl **scc)
 951 {
 952         SpoolControl *sc;
 953         namelist *nptr = NULL;
 954         maplist *mptr = NULL;
 955
 956         sc = *scc;
 957         while (sc->listrecps != NULL) {
 958                 nptr = sc->listrecps->next;
 959                 free(sc->listrecps);
 960                 sc->listrecps = nptr;
 961         }
 962         /* Do the same for digestrecps */
 963         while (sc->digestrecps != NULL) {
 964                 nptr = sc->digestrecps->next;
 965                 free(sc->digestrecps);
 966                 sc->digestrecps = nptr;
 967         }
 968         /* Do the same for participates */
 969         while (sc->participates != NULL) {
 970                 nptr = sc->participates->next;
 971                 free(sc->participates);
 972                 sc->participates = nptr;
 973         }
 974         while (sc->ignet_push_shares != NULL) {
 975                 mptr = sc->ignet_push_shares->next;
 976                 free(sc->ignet_push_shares);
 977                 sc->ignet_push_shares = mptr;
 978         }
 979         free(sc->misc);
 980         free(sc);
 981         *scc=NULL;
 982 }
 983
 984 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 985 {
 986         FILE *fp;
 987         SpoolControl *sc;
 988         namelist *nptr = NULL;
 989         maplist *mptr = NULL;
 990
 991         sc = *scc;
 992         fp = fopen(filename, "w");
 993         if (fp == NULL) {
 994                 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
 995                         filename, strerror(errno));
 996                 free_spoolcontrol_struct(scc);
 997         }
 998         else {
 999                 fprintf(fp, "lastsent|%ld\n", sc->lastsent);
1000
1001                 /* Write out the listrecps while freeing from memory at the
1002                  * same time.  Am I clever or what?  :)
1003                  */
1004                 while (sc->listrecps != NULL) {
1005                         fprintf(fp, "listrecp|%s\n", sc->listrecps->name);
1006                         nptr = sc->listrecps->next;
1007                         free(sc->listrecps);
1008                         sc->listrecps = nptr;
1009                 }
1010                 /* Do the same for digestrecps */
1011                 while (sc->digestrecps != NULL) {
1012                         fprintf(fp, "digestrecp|%s\n", sc->digestrecps->name);
1013                         nptr = sc->digestrecps->next;
1014                         free(sc->digestrecps);
1015                         sc->digestrecps = nptr;
1016                 }
1017                 /* Do the same for participates */
1018                 while (sc->participates != NULL) {
1019                         fprintf(fp, "participate|%s\n", sc->participates->name);
1020                         nptr = sc->participates->next;
1021                         free(sc->participates);
1022                         sc->participates = nptr;
1023                 }
1024                 while (sc->ignet_push_shares != NULL) {
1025                         fprintf(fp, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1026                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1027                                 fprintf(fp, "|%s", sc->ignet_push_shares->remote_roomname);
1028                         }
1029                         fprintf(fp, "\n");
1030                         mptr = sc->ignet_push_shares->next;
1031                         free(sc->ignet_push_shares);
1032                         sc->ignet_push_shares = mptr;
1033                 }
1034                 if (sc->misc != NULL) {
1035                         fwrite(sc->misc, strlen(sc->misc), 1, fp);
1036                 }
1037                 free(sc->misc);
1038
1039                 fclose(fp);
1040                 free(sc);
1041                 *scc=NULL;
1042         }
1043         return 1;
1044 }
1045 int is_recipient(SpoolControl *sc, const char *Name)
1046 {
1047         namelist *nptr;
1048         size_t len;
1049
1050         len = strlen(Name);
1051         nptr = sc->listrecps;
1052         while (nptr != NULL) {
1053                 if (strncmp(Name, nptr->name, len)==0)
1054                         return 1;
1055                 nptr = nptr->next;
1056         }
1057         /* Do the same for digestrecps */
1058         nptr = sc->digestrecps;
1059         while (nptr != NULL) {
1060                 if (strncmp(Name, nptr->name, len)==0)
1061                         return 1;
1062                 nptr = nptr->next;
1063         }
1064         /* Do the same for participates */
1065         nptr = sc->participates;
1066         while (nptr != NULL) {
1067                 if (strncmp(Name, nptr->name, len)==0)
1068                         return 1;
1069                 nptr = nptr->next;
1070         }
1071         return 0;
1072 }
1073
1074
1075 /*
1076  * Batch up and send all outbound traffic from the current room
1077  */
1078 void network_spoolout_room(char *room_to_spool) {
1079         char buf[SIZ];
1080         char filename[SIZ];
1081         SpoolControl *sc;
1082         int i;
1083
1084         /*
1085          * If the room doesn't exist, don't try to perform its networking tasks.
1086          * Normally this should never happen, but once in a while maybe a room gets
1087          * queued for networking and then deleted before it can happen.
1088          */
1089         if (getroom(&CC->room, room_to_spool) != 0) {
1090                 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1091                 return;
1092         }
1093
1094         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1095
1096         CtdlLogPrintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
1097         begin_critical_section(S_NETCONFIGS);
1098
1099         /* Only do net processing for rooms that have netconfigs */
1100
1101         if (!read_spoolcontrol_file(&sc, filename))
1102         {
1103                 end_critical_section(S_NETCONFIGS);
1104                 return;
1105         }
1106
1107         /* If there are digest recipients, we have to build a digest */
1108         if (sc->digestrecps != NULL) {
1109                 sc->digestfp = tmpfile();
1110                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1111         }
1112
1113         /* Do something useful */
1114         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1115                 network_spool_msg, sc);
1116
1117         /* If we wrote a digest, deliver it and then close it */
1118         snprintf(buf, sizeof buf, "room_%s@%s",
1119                 CC->room.QRname, config.c_fqdn);
1120         for (i=0; buf[i]; ++i) {
1121                 buf[i] = tolower(buf[i]);
1122                 if (isspace(buf[i])) buf[i] = '_';
1123         }
1124         if (sc->digestfp != NULL) {
1125                 fprintf(sc->digestfp,   " -----------------------------------"
1126                                         "------------------------------------"
1127                                         "-------\n"
1128                                         "You are subscribed to the '%s' "
1129                                         "list.\n"
1130                                         "To post to the list: %s\n",
1131                                         CC->room.QRname, buf
1132                 );
1133                 network_deliver_digest(sc);     /* deliver and close */
1134         }
1135
1136         /* Now rewrite the config file */
1137         writenfree_spoolcontrol_file (&sc, filename);
1138         end_critical_section(S_NETCONFIGS);
1139 }
1140
1141
1142
1143 /*
1144  * Send the *entire* contents of the current room to one specific network node,
1145  * ignoring anything we know about which messages have already undergone
1146  * network processing.  This can be used to bring a new node into sync.
1147  */
1148 int network_sync_to(char *target_node) {
1149         SpoolControl sc;
1150         int num_spooled = 0;
1151         int found_node = 0;
1152         char buf[256];
1153         char sc_type[256];
1154         char sc_node[256];
1155         char sc_room[256];
1156         char filename[256];
1157         FILE *fp;
1158
1159         /* Grab the configuration line we're looking for */
1160         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1161         begin_critical_section(S_NETCONFIGS);
1162         fp = fopen(filename, "r");
1163         if (fp == NULL) {
1164                 end_critical_section(S_NETCONFIGS);
1165                 return(-1);
1166         }
1167         while (fgets(buf, sizeof buf, fp) != NULL) {
1168                 buf[strlen(buf)-1] = 0;
1169                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1170                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1171                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1172                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1173                    && (!strcasecmp(sc_node, target_node)) ) {
1174                         found_node = 1;
1175
1176                         /* Concise syntax because we don't need a full linked-list */
1177                         memset(&sc, 0, sizeof(SpoolControl));
1178                         sc.ignet_push_shares = (maplist *)
1179                                 malloc(sizeof(maplist));
1180                         sc.ignet_push_shares->next = NULL;
1181                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1182                                 sc_node,
1183                                 sizeof sc.ignet_push_shares->remote_nodename);
1184                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1185                                 sc_room,
1186                                 sizeof sc.ignet_push_shares->remote_roomname);
1187                 }
1188         }
1189         fclose(fp);
1190         end_critical_section(S_NETCONFIGS);
1191
1192         if (!found_node) return(-1);
1193
1194         /* Send ALL messages */
1195         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1196                 network_spool_msg, &sc);
1197
1198         /* Concise cleanup because we know there's only one node in the sc */
1199         free(sc.ignet_push_shares);
1200
1201         CtdlLogPrintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1202                 num_spooled, target_node);
1203         return(num_spooled);
1204 }
1205
1206
1207 /*
1208  * Implements the NSYN command
1209  */
1210 void cmd_nsyn(char *argbuf) {
1211         int num_spooled;
1212         char target_node[256];
1213
1214         if (CtdlAccessCheck(ac_aide)) return;
1215
1216         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1217         num_spooled = network_sync_to(target_node);
1218         if (num_spooled >= 0) {
1219                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1220         }
1221         else {
1222                 cprintf("%d No such room/node share exists.\n",
1223                         ERROR + ROOM_NOT_FOUND);
1224         }
1225 }
1226
1227
1228
1229 /*
1230  * Batch up and send all outbound traffic from the current room
1231  */
1232 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1233         struct RoomProcList *ptr;
1234
1235         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1236         if (ptr == NULL) return;
1237
1238         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1239         begin_critical_section(S_RPLIST);
1240         ptr->next = rplist;
1241         rplist = ptr;
1242         end_critical_section(S_RPLIST);
1243 }
1244
1245 void destroy_network_queue_room(void)
1246 {
1247         struct RoomProcList *cur, *p;
1248         NetMap *nmcur, *nmp;
1249
1250         cur = rplist;
1251         begin_critical_section(S_RPLIST);
1252         while (cur != NULL)
1253         {
1254                 p = cur->next;
1255                 free (cur);
1256                 cur = p;
1257         }
1258         rplist = NULL;
1259         end_critical_section(S_RPLIST);
1260
1261         nmcur = the_netmap;
1262         while (nmcur != NULL)
1263         {
1264                 nmp = nmcur->next;
1265                 free (nmcur);
1266                 nmcur = nmp;
1267         }
1268         the_netmap = NULL;
1269         if (working_ignetcfg != NULL)
1270                 free (working_ignetcfg);
1271         working_ignetcfg = NULL;
1272 }
1273
1274
1275 /*
1276  * Learn topology from path fields
1277  */
1278 void network_learn_topology(char *node, char *path) {
1279         char nexthop[256];
1280         NetMap *nmptr;
1281
1282         strcpy(nexthop, "");
1283
1284         if (num_tokens(path, '!') < 3) return;
1285         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1286                 if (!strcasecmp(nmptr->nodename, node)) {
1287                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1288                         nmptr->lastcontact = time(NULL);
1289                         ++netmap_changed;
1290                         return;
1291                 }
1292         }
1293
1294         /* If we got here then it's not in the map, so add it. */
1295         nmptr = (NetMap *) malloc(sizeof (NetMap));
1296         strcpy(nmptr->nodename, node);
1297         nmptr->lastcontact = time(NULL);
1298         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1299         nmptr->next = the_netmap;
1300         the_netmap = nmptr;
1301         ++netmap_changed;
1302 }
1303
1304
1305
1306
1307 /*
1308  * Bounce a message back to the sender
1309  */
1310 void network_bounce(struct CtdlMessage *msg, char *reason) {
1311         char *oldpath = NULL;
1312         char buf[SIZ];
1313         char bouncesource[SIZ];
1314         char recipient[SIZ];
1315         struct recptypes *valid = NULL;
1316         char force_room[ROOMNAMELEN];
1317         static int serialnum = 0;
1318         size_t size;
1319
1320         CtdlLogPrintf(CTDL_DEBUG, "entering network_bounce()\n");
1321
1322         if (msg == NULL) return;
1323
1324         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1325
1326         /*
1327          * Give it a fresh message ID
1328          */
1329         if (msg->cm_fields['I'] != NULL) {
1330                 free(msg->cm_fields['I']);
1331         }
1332         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1333                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1334         msg->cm_fields['I'] = strdup(buf);
1335
1336         /*
1337          * FIXME ... right now we're just sending a bounce; we really want to
1338          * include the text of the bounced message.
1339          */
1340         if (msg->cm_fields['M'] != NULL) {
1341                 free(msg->cm_fields['M']);
1342         }
1343         msg->cm_fields['M'] = strdup(reason);
1344         msg->cm_format_type = 0;
1345
1346         /*
1347          * Turn the message around
1348          */
1349         if (msg->cm_fields['R'] == NULL) {
1350                 free(msg->cm_fields['R']);
1351         }
1352
1353         if (msg->cm_fields['D'] == NULL) {
1354                 free(msg->cm_fields['D']);
1355         }
1356
1357         snprintf(recipient, sizeof recipient, "%s@%s",
1358                 msg->cm_fields['A'], msg->cm_fields['N']);
1359
1360         if (msg->cm_fields['A'] == NULL) {
1361                 free(msg->cm_fields['A']);
1362         }
1363
1364         if (msg->cm_fields['N'] == NULL) {
1365                 free(msg->cm_fields['N']);
1366         }
1367
1368         if (msg->cm_fields['U'] == NULL) {
1369                 free(msg->cm_fields['U']);
1370         }
1371
1372         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1373         msg->cm_fields['N'] = strdup(config.c_nodename);
1374         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1375
1376         /* prepend our node to the path */
1377         if (msg->cm_fields['P'] != NULL) {
1378                 oldpath = msg->cm_fields['P'];
1379                 msg->cm_fields['P'] = NULL;
1380         }
1381         else {
1382                 oldpath = strdup("unknown_user");
1383         }
1384         size = strlen(oldpath) + SIZ;
1385         msg->cm_fields['P'] = malloc(size);
1386         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1387         free(oldpath);
1388
1389         /* Now submit the message */
1390         valid = validate_recipients(recipient, NULL, 0);
1391         if (valid != NULL) if (valid->num_error != 0) {
1392                 free_recipients(valid);
1393                 valid = NULL;
1394         }
1395         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1396                 strcpy(force_room, config.c_aideroom);
1397         }
1398         else {
1399                 strcpy(force_room, "");
1400         }
1401         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1402                 strcpy(force_room, config.c_aideroom);
1403         }
1404         CtdlSubmitMsg(msg, valid, force_room);
1405
1406         /* Clean up */
1407         if (valid != NULL) free_recipients(valid);
1408         CtdlFreeMessage(msg);
1409         CtdlLogPrintf(CTDL_DEBUG, "leaving network_bounce()\n");
1410 }
1411
1412
1413
1414
1415 /*
1416  * Process a buffer containing a single message from a single file
1417  * from the inbound queue
1418  */
1419 void network_process_buffer(char *buffer, long size) {
1420         struct CtdlMessage *msg = NULL;
1421         long pos;
1422         int field;
1423         struct recptypes *recp = NULL;
1424         char target_room[ROOMNAMELEN];
1425         struct ser_ret sermsg;
1426         char *oldpath = NULL;
1427         char filename[SIZ];
1428         FILE *fp;
1429         char nexthop[SIZ];
1430         unsigned char firstbyte;
1431         unsigned char lastbyte;
1432
1433         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
1434         firstbyte = buffer[0];
1435         lastbyte = buffer[size-1];
1436         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1437                 CtdlLogPrintf(CTDL_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
1438                         size, firstbyte, lastbyte);
1439                 return;
1440         }
1441
1442         /* Set default target room to trash */
1443         strcpy(target_room, TWITROOM);
1444
1445         /* Load the message into memory */
1446         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1447         memset(msg, 0, sizeof(struct CtdlMessage));
1448         msg->cm_magic = CTDLMESSAGE_MAGIC;
1449         msg->cm_anon_type = buffer[1];
1450         msg->cm_format_type = buffer[2];
1451
1452         for (pos = 3; pos < size; ++pos) {
1453                 field = buffer[pos];
1454                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1455                 pos = pos + strlen(&buffer[(int)pos]);
1456         }
1457
1458         /* Check for message routing */
1459         if (msg->cm_fields['D'] != NULL) {
1460                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1461
1462                         /* route the message */
1463                         strcpy(nexthop, "");
1464                         if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1465                                 /* prepend our node to the path */
1466                                 if (msg->cm_fields['P'] != NULL) {
1467                                         oldpath = msg->cm_fields['P'];
1468                                         msg->cm_fields['P'] = NULL;
1469                                 }
1470                                 else {
1471                                         oldpath = strdup("unknown_user");
1472                                 }
1473                                 size = strlen(oldpath) + SIZ;
1474                                 msg->cm_fields['P'] = malloc(size);
1475                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1476                                         config.c_nodename, oldpath);
1477                                 free(oldpath);
1478
1479                                 /* serialize the message */
1480                                 serialize_message(&sermsg, msg);
1481
1482                                 /* now send it */
1483                                 if (IsEmptyStr(nexthop)) {
1484                                         strcpy(nexthop, msg->cm_fields['D']);
1485                                 }
1486                                 snprintf(filename,
1487                                                  sizeof filename,
1488                                                  "%s/%s",
1489                                                  ctdl_netout_dir,
1490                                                  nexthop);
1491                                 CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
1492                                 fp = fopen(filename, "ab");
1493                                 if (fp != NULL) {
1494                                         fwrite(sermsg.ser,
1495                                                 sermsg.len, 1, fp);
1496                                         fclose(fp);
1497                                 }
1498                                 else {
1499                                         CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1500                                 }
1501                                 free(sermsg.ser);
1502                                 CtdlFreeMessage(msg);
1503                                 return;
1504                         }
1505
1506                         else {  /* invalid destination node name */
1507
1508                                 network_bounce(msg,
1509 "A message you sent could not be delivered due to an invalid destination node"
1510 " name.  Please check the address and try sending the message again.\n");
1511                                 msg = NULL;
1512                                 return;
1513
1514                         }
1515                 }
1516         }
1517
1518         /*
1519          * Check to see if we already have a copy of this message, and
1520          * abort its processing if so.  (We used to post a warning to Aide>
1521          * every time this happened, but the network is now so densely
1522          * connected that it's inevitable.)
1523          */
1524         if (network_usetable(msg) != 0) {
1525                 CtdlFreeMessage(msg);
1526                 return;
1527         }
1528
1529         /* Learn network topology from the path */
1530         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1531                 network_learn_topology(msg->cm_fields['N'],
1532                                         msg->cm_fields['P']);
1533         }
1534
1535         /* Is the sending node giving us a very persuasive suggestion about
1536          * which room this message should be saved in?  If so, go with that.
1537          */
1538         if (msg->cm_fields['C'] != NULL) {
1539                 safestrncpy(target_room,
1540                         msg->cm_fields['C'],
1541                         sizeof target_room);
1542         }
1543
1544         /* Otherwise, does it have a recipient?  If so, validate it... */
1545         else if (msg->cm_fields['R'] != NULL) {
1546                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1547                 if (recp != NULL) if (recp->num_error != 0) {
1548                         network_bounce(msg,
1549                                 "A message you sent could not be delivered due to an invalid address.\n"
1550                                 "Please check the address and try sending the message again.\n");
1551                         msg = NULL;
1552                         free_recipients(recp);
1553                         return;
1554                 }
1555                 strcpy(target_room, "");        /* no target room if mail */
1556         }
1557
1558         /* Our last shot at finding a home for this message is to see if
1559          * it has the O field (Originating room) set.
1560          */
1561         else if (msg->cm_fields['O'] != NULL) {
1562                 safestrncpy(target_room,
1563                         msg->cm_fields['O'],
1564                         sizeof target_room);
1565         }
1566
1567         /* Strip out fields that are only relevant during transit */
1568         if (msg->cm_fields['D'] != NULL) {
1569                 free(msg->cm_fields['D']);
1570                 msg->cm_fields['D'] = NULL;
1571         }
1572         if (msg->cm_fields['C'] != NULL) {
1573                 free(msg->cm_fields['C']);
1574                 msg->cm_fields['C'] = NULL;
1575         }
1576
1577         /* save the message into a room */
1578         if (PerformNetprocHooks(msg, target_room) == 0) {
1579                 msg->cm_flags = CM_SKIP_HOOKS;
1580                 CtdlSubmitMsg(msg, recp, target_room);
1581         }
1582         CtdlFreeMessage(msg);
1583         free_recipients(recp);
1584 }
1585
1586
1587 /*
1588  * Process a single message from a single file from the inbound queue
1589  */
1590 void network_process_message(FILE *fp, long msgstart, long msgend) {
1591         long hold_pos;
1592         long size;
1593         char *buffer;
1594
1595         hold_pos = ftell(fp);
1596         size = msgend - msgstart + 1;
1597         buffer = malloc(size);
1598         if (buffer != NULL) {
1599                 fseek(fp, msgstart, SEEK_SET);
1600                 fread(buffer, size, 1, fp);
1601                 network_process_buffer(buffer, size);
1602                 free(buffer);
1603         }
1604
1605         fseek(fp, hold_pos, SEEK_SET);
1606 }
1607
1608
1609 /*
1610  * Process a single file from the inbound queue
1611  */
1612 void network_process_file(char *filename) {
1613         FILE *fp;
1614         long msgstart = (-1L);
1615         long msgend = (-1L);
1616         long msgcur = 0L;
1617         int ch;
1618
1619
1620         fp = fopen(filename, "rb");
1621         if (fp == NULL) {
1622                 CtdlLogPrintf(CTDL_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1623                 return;
1624         }
1625
1626         fseek(fp, 0L, SEEK_END);
1627         CtdlLogPrintf(CTDL_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1628         rewind(fp);
1629
1630         /* Look for messages in the data stream and break them out */
1631         while (ch = getc(fp), ch >= 0) {
1632
1633                 if (ch == 255) {
1634                         if (msgstart >= 0L) {
1635                                 msgend = msgcur - 1;
1636                                 network_process_message(fp, msgstart, msgend);
1637                         }
1638                         msgstart = msgcur;
1639                 }
1640
1641                 ++msgcur;
1642         }
1643
1644         msgend = msgcur - 1;
1645         if (msgstart >= 0L) {
1646                 network_process_message(fp, msgstart, msgend);
1647         }
1648
1649         fclose(fp);
1650         unlink(filename);
1651 }
1652
1653
1654 /*
1655  * Process anything in the inbound queue
1656  */
1657 void network_do_spoolin(void) {
1658         DIR *dp;
1659         struct dirent *d;
1660         struct stat statbuf;
1661         char filename[256];
1662         static time_t last_spoolin_mtime = 0L;
1663
1664         /*
1665          * Check the spoolin directory's modification time.  If it hasn't
1666          * been touched, we don't need to scan it.
1667          */
1668         if (stat(ctdl_netin_dir, &statbuf)) return;
1669         if (statbuf.st_mtime == last_spoolin_mtime) {
1670                 CtdlLogPrintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1671                 return;
1672         }
1673         last_spoolin_mtime = statbuf.st_mtime;
1674         CtdlLogPrintf(CTDL_DEBUG, "network: processing inbound queue\n");
1675
1676         /*
1677          * Ok, there's something interesting in there, so scan it.
1678          */
1679         dp = opendir(ctdl_netin_dir);
1680         if (dp == NULL) return;
1681
1682         while (d = readdir(dp), d != NULL) {
1683                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1684                         snprintf(filename,
1685                                          sizeof filename,
1686                                          "%s/%s",
1687                                          ctdl_netin_dir,
1688                                          d->d_name);
1689                         network_process_file(filename);
1690                 }
1691         }
1692
1693         closedir(dp);
1694 }
1695
1696 /*
1697  * Delete any files in the outbound queue that were intended
1698  * to be sent to nodes which no longer exist.
1699  */
1700 void network_purge_spoolout(void) {
1701         DIR *dp;
1702         struct dirent *d;
1703         char filename[256];
1704         char nexthop[256];
1705         int i;
1706
1707         dp = opendir(ctdl_netout_dir);
1708         if (dp == NULL) return;
1709
1710         while (d = readdir(dp), d != NULL) {
1711                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1712                         continue;
1713                 snprintf(filename,
1714                                  sizeof filename,
1715                                  "%s/%s",
1716                                  ctdl_netout_dir,
1717                                  d->d_name);
1718
1719                 strcpy(nexthop, "");
1720                 i = is_valid_node(nexthop, NULL, d->d_name);
1721
1722                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1723                         unlink(filename);
1724                 }
1725         }
1726
1727
1728         closedir(dp);
1729 }
1730
1731
1732 /*
1733  * receive network spool from the remote system
1734  */
1735 void receive_spool(int sock, char *remote_nodename) {
1736         long download_len = 0L;
1737         long bytes_received = 0L;
1738         long bytes_copied = 0L;
1739         char buf[SIZ];
1740         static char pbuf[IGNET_PACKET_SIZE];
1741         char tempfilename[PATH_MAX];
1742         char filename[PATH_MAX];
1743         long plen;
1744         FILE *fp, *newfp;
1745
1746         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
1747         if (sock_puts(sock, "NDOP") < 0) return;
1748         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1749         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1750         if (buf[0] != '2') {
1751                 return;
1752         }
1753         download_len = extract_long(&buf[4], 0);
1754
1755         bytes_received = 0L;
1756         fp = fopen(tempfilename, "w");
1757         if (fp == NULL) {
1758                 CtdlLogPrintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1759                         strerror(errno));
1760                 return;
1761         }
1762
1763         while (bytes_received < download_len) {
1764                 /**
1765                  * If shutting down we can exit here and unlink the temp file.
1766                  * this shouldn't loose us any messages.
1767                  */
1768                 if (CtdlThreadCheckStop())
1769                 {
1770                         fclose(fp);
1771                         unlink(tempfilename);
1772                         return;
1773                 }
1774                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1775                         bytes_received,
1776                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1777                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1778                 if (sock_puts(sock, buf) < 0) {
1779                         fclose(fp);
1780                         unlink(tempfilename);
1781                         return;
1782                 }
1783                 if (sock_getln(sock, buf, sizeof buf) < 0) {
1784                         fclose(fp);
1785                         unlink(tempfilename);
1786                         return;
1787                 }
1788                 if (buf[0] == '6') {
1789                         plen = extract_long(&buf[4], 0);
1790                         if (sock_read(sock, pbuf, plen, 1) < 0) {
1791                                 fclose(fp);
1792                                 unlink(tempfilename);
1793                                 return;
1794                         }
1795                         fwrite((char *) pbuf, plen, 1, fp);
1796                         bytes_received = bytes_received + plen;
1797                 }
1798         }
1799
1800         fclose(fp);
1801         /** Last chance for shutdown exit */
1802         if (CtdlThreadCheckStop())
1803         {
1804                 unlink(tempfilename);
1805                 return;
1806         }
1807         if (sock_puts(sock, "CLOS") < 0) {
1808                 unlink(tempfilename);
1809                 return;
1810         }
1811         /**
1812          * From here on we must complete or messages will get lost
1813          */
1814         if (sock_getln(sock, buf, sizeof buf) < 0) {
1815                 unlink(tempfilename);
1816                 return;
1817         }
1818         if (download_len > 0) {
1819                 CtdlLogPrintf(CTDL_NOTICE, "Received %ld octets from <%s>\n", download_len, remote_nodename);
1820         }
1821         CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
1822
1823         /* Now copy the temp file to its permanent location.
1824          * (We copy instead of link because they may be on different filesystems)
1825          */
1826         begin_critical_section(S_NETSPOOL);
1827         snprintf(filename,
1828                          sizeof filename,
1829                          "%s/%s.%ld",
1830                          ctdl_netin_dir,
1831                          remote_nodename,
1832                          (long) getpid()
1833         );
1834         fp = fopen(tempfilename, "r");
1835         if (fp != NULL) {
1836                 newfp = fopen(filename, "w");
1837                 if (newfp != NULL) {
1838                         bytes_copied = 0L;
1839                         while (bytes_copied < download_len) {
1840                                 plen = download_len - bytes_copied;
1841                                 if (plen > sizeof buf) {
1842                                         plen = sizeof buf;
1843                                 }
1844                                 fread(buf, plen, 1, fp);
1845                                 fwrite(buf, plen, 1, newfp);
1846                                 bytes_copied += plen;
1847                         }
1848                         fclose(newfp);
1849                 }
1850                 fclose(fp);
1851         }
1852         end_critical_section(S_NETSPOOL);
1853         unlink(tempfilename);
1854 }
1855
1856
1857
1858 /*
1859  * transmit network spool to the remote system
1860  */
1861 void transmit_spool(int sock, char *remote_nodename)
1862 {
1863         char buf[SIZ];
1864         char pbuf[4096];
1865         long plen;
1866         long bytes_to_write, thisblock, bytes_written;
1867         int fd;
1868         char sfname[128];
1869
1870         if (sock_puts(sock, "NUOP") < 0) return;
1871         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1872         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1873         if (buf[0] != '2') {
1874                 return;
1875         }
1876
1877         snprintf(sfname, sizeof sfname,
1878                          "%s/%s",
1879                          ctdl_netout_dir,
1880                          remote_nodename);
1881         fd = open(sfname, O_RDONLY);
1882         if (fd < 0) {
1883                 if (errno != ENOENT) {
1884                         CtdlLogPrintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1885                                 strerror(errno));
1886                 }
1887                 return;
1888         }
1889         bytes_written = 0;
1890         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1891                 bytes_to_write = plen;
1892                 while (bytes_to_write > 0L) {
1893                         /** Exit if shutting down */
1894                         if (CtdlThreadCheckStop())
1895                         {
1896                                 close(fd);
1897                                 return;
1898                         }
1899
1900                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1901                         if (sock_puts(sock, buf) < 0) {
1902                                 close(fd);
1903                                 return;
1904                         }
1905                         if (sock_getln(sock, buf, sizeof buf) < 0) {
1906                                 close(fd);
1907                                 return;
1908                         }
1909                         thisblock = atol(&buf[4]);
1910                         if (buf[0] == '7') {
1911                                 if (sock_write(sock, pbuf,
1912                                    (int) thisblock) < 0) {
1913                                         close(fd);
1914                                         return;
1915                                 }
1916                                 bytes_to_write -= thisblock;
1917                                 bytes_written += thisblock;
1918                         } else {
1919                                 goto ABORTUPL;
1920                         }
1921                 }
1922         }
1923
1924 ABORTUPL:
1925         close(fd);
1926         /** Last chance for shutdown exit */
1927         if(CtdlThreadCheckStop())
1928                 return;
1929
1930         if (sock_puts(sock, "UCLS 1") < 0) return;
1931         /**
1932          * From here on we must complete or messages will get lost
1933          */
1934         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1935         CtdlLogPrintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n",
1936                         bytes_written, remote_nodename);
1937         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1938         if (buf[0] == '2') {
1939                 CtdlLogPrintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
1940                 unlink(sfname);
1941         }
1942 }
1943
1944
1945
1946 /*
1947  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1948  */
1949 void network_poll_node(char *node, char *secret, char *host, char *port) {
1950         int sock;
1951         char buf[SIZ];
1952
1953         if (network_talking_to(node, NTT_CHECK)) return;
1954         network_talking_to(node, NTT_ADD);
1955         CtdlLogPrintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
1956
1957         sock = sock_connect(host, port, "tcp");
1958         if (sock < 0) {
1959                 CtdlLogPrintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
1960                 network_talking_to(node, NTT_REMOVE);
1961                 return;
1962         }
1963
1964         CtdlLogPrintf(CTDL_DEBUG, "Connected!\n");
1965
1966         /* Read the server greeting */
1967         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
1968         CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
1969
1970         /* Identify ourselves */
1971         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1972         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1973         if (sock_puts(sock, buf) <0) goto bail;
1974         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
1975         CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
1976         if (buf[0] != '2') goto bail;
1977
1978         /* At this point we are authenticated. */
1979         if (!CtdlThreadCheckStop())
1980                 receive_spool(sock, node);
1981         if (!CtdlThreadCheckStop())
1982                 transmit_spool(sock, node);
1983
1984         sock_puts(sock, "QUIT");
1985 bail:   sock_close(sock);
1986         network_talking_to(node, NTT_REMOVE);
1987 }
1988
1989
1990
1991 /*
1992  * Poll other Citadel nodes and transfer inbound/outbound network data.
1993  * Set "full" to nonzero to force a poll of every node, or to zero to poll
1994  * only nodes to which we have data to send.
1995  */
1996 void network_poll_other_citadel_nodes(int full_poll) {
1997         int i;
1998         char linebuf[256];
1999         char node[SIZ];
2000         char host[256];
2001         char port[256];
2002         char secret[256];
2003         int poll = 0;
2004         char spoolfile[256];
2005
2006         if (working_ignetcfg == NULL) {
2007                 CtdlLogPrintf(CTDL_DEBUG, "No nodes defined - not polling\n");
2008                 return;
2009         }
2010
2011         /* Use the string tokenizer to grab one line at a time */
2012         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2013                 if(CtdlThreadCheckStop())
2014                         return;
2015                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2016                 extract_token(node, linebuf, 0, '|', sizeof node);
2017                 extract_token(secret, linebuf, 1, '|', sizeof secret);
2018                 extract_token(host, linebuf, 2, '|', sizeof host);
2019                 extract_token(port, linebuf, 3, '|', sizeof port);
2020                 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2021                    && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2022                         poll = full_poll;
2023                         if (poll == 0) {
2024                                 snprintf(spoolfile,
2025                                                  sizeof spoolfile,
2026                                                  "%s/%s",
2027                                                  ctdl_netout_dir,
2028                                                  node);
2029                                 if (access(spoolfile, R_OK) == 0) {
2030                                         poll = 1;
2031                                 }
2032                         }
2033                         if (poll) {
2034                                 network_poll_node(node, secret, host, port);
2035                         }
2036                 }
2037         }
2038
2039 }
2040
2041
2042
2043
2044 /*
2045  * It's ok if these directories already exist.  Just fail silently.
2046  */
2047 void create_spool_dirs(void) {
2048         mkdir(ctdl_spool_dir, 0700);
2049         chown(ctdl_spool_dir, CTDLUID, (-1));
2050         mkdir(ctdl_netin_dir, 0700);
2051         chown(ctdl_netin_dir, CTDLUID, (-1));
2052         mkdir(ctdl_netout_dir, 0700);
2053         chown(ctdl_netout_dir, CTDLUID, (-1));
2054 }
2055
2056
2057
2058
2059
2060 /*
2061  * network_do_queue()
2062  *
2063  * Run through the rooms doing various types of network stuff.
2064  */
2065 void *network_do_queue(void *args) {
2066         static time_t last_run = 0L;
2067         struct RoomProcList *ptr;
2068         int full_processing = 1;
2069         struct CitContext networkerCC;
2070
2071         /* Give the networker its own private CitContext */
2072         memset(&networkerCC, 0, sizeof(struct CitContext));
2073         networkerCC.internal_pgm = 1;
2074         networkerCC.cs_pid = 0;
2075         pthread_setspecific(MyConKey, (void *)&networkerCC );
2076
2077         /*
2078          * Run the full set of processing tasks no more frequently
2079          * than once every n seconds
2080          */
2081         if ( (time(NULL) - last_run) < config.c_net_freq ) {
2082                 full_processing = 0;
2083                 CtdlLogPrintf(CTDL_DEBUG, "Network full processing in %ld seconds.\n", config.c_net_freq - (time(NULL)- last_run));
2084         }
2085
2086         /*
2087          * This is a simple concurrency check to make sure only one queue run
2088          * is done at a time.  We could do this with a mutex, but since we
2089          * don't really require extremely fine granularity here, we'll do it
2090          * with a static variable instead.
2091          */
2092         if (doing_queue) return NULL;
2093         doing_queue = 1;
2094
2095         /* Load the IGnet Configuration into memory */
2096         load_working_ignetcfg();
2097
2098         /*
2099          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
2100          * then we poll everyone.  Otherwise we only poll nodes we have stuff
2101          * to send to.
2102          */
2103         network_poll_other_citadel_nodes(full_processing);
2104
2105         /*
2106          * Load the network map and filter list into memory.
2107          */
2108         read_network_map();
2109         filterlist = load_filter_list();
2110
2111         /*
2112          * Go ahead and run the queue
2113          */
2114         if (full_processing && !CtdlThreadCheckStop()) {
2115                 CtdlLogPrintf(CTDL_DEBUG, "network: loading outbound queue\n");
2116                 ForEachRoom(network_queue_room, NULL);
2117         }
2118
2119         if (rplist != NULL) {
2120                 CtdlLogPrintf(CTDL_DEBUG, "network: running outbound queue\n");
2121                 while (rplist != NULL && !CtdlThreadCheckStop()) {
2122                         char spoolroomname[ROOMNAMELEN];
2123                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2124                         begin_critical_section(S_RPLIST);
2125
2126                         /* pop this record off the list */
2127                         ptr = rplist;
2128                         rplist = rplist->next;
2129                         free(ptr);
2130
2131                         /* invalidate any duplicate entries to prevent double processing */
2132                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2133                                 if (!strcasecmp(ptr->name, spoolroomname)) {
2134                                         ptr->name[0] = 0;
2135                                 }
2136                         }
2137
2138                         end_critical_section(S_RPLIST);
2139                         if (spoolroomname[0] != 0) {
2140                                 network_spoolout_room(spoolroomname);
2141                         }
2142                 }
2143         }
2144
2145         /* If there is anything in the inbound queue, process it */
2146         if (!CtdlThreadCheckStop())
2147                 network_do_spoolin();
2148
2149         /* Save the network map back to disk */
2150         write_network_map();
2151
2152         /* Free the filter list in memory */
2153         free_filter_list(filterlist);
2154         filterlist = NULL;
2155
2156         network_purge_spoolout();
2157
2158         CtdlLogPrintf(CTDL_DEBUG, "network: queue run completed\n");
2159
2160         if (full_processing) {
2161                 last_run = time(NULL);
2162         }
2163
2164         doing_queue = 0;
2165         if (!CtdlThreadCheckStop()) // Only reschedule if system is not stopping
2166                 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, time(NULL) + 60);
2167         else
2168                 CtdlLogPrintf(CTDL_DEBUG, "network: Task STOPPED.\n");
2169         return NULL;
2170 }
2171
2172
2173 /*
2174  * cmd_netp() - authenticate to the server as another Citadel node polling
2175  *            for network traffic
2176  */
2177 void cmd_netp(char *cmdbuf)
2178 {
2179         char node[256];
2180         char pass[256];
2181         int v;
2182
2183         char secret[256];
2184         char nexthop[256];
2185
2186         /* Authenticate */
2187         extract_token(node, cmdbuf, 0, '|', sizeof node);
2188         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2189
2190         if (doing_queue) {
2191                 CtdlLogPrintf(CTDL_WARNING, "Network node <%s> refused - spooling", node);
2192                 cprintf("%d spooling - try again in a few minutes\n",
2193                         ERROR + RESOURCE_BUSY);
2194                 return;
2195         }
2196
2197         /* load the IGnet Configuration to check node validity */
2198         load_working_ignetcfg();
2199         v = is_valid_node(nexthop, secret, node);
2200
2201         if (v != 0) {
2202                 CtdlLogPrintf(CTDL_WARNING, "Unknown node <%s>\n", node);
2203                 cprintf("%d authentication failed\n",
2204                         ERROR + PASSWORD_REQUIRED);
2205                 return;
2206         }
2207
2208         if (strcasecmp(pass, secret)) {
2209                 CtdlLogPrintf(CTDL_WARNING, "Bad password for network node <%s>", node);
2210                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2211                 return;
2212         }
2213
2214         if (network_talking_to(node, NTT_CHECK)) {
2215                 CtdlLogPrintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2216                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2217                 return;
2218         }
2219
2220         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2221         network_talking_to(node, NTT_ADD);
2222         CtdlLogPrintf(CTDL_NOTICE, "Network node <%s> logged in\n", CC->net_node);
2223         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
2224                 CC->net_node);
2225 }
2226
2227 int network_room_handler (struct ctdlroom *room)
2228 {
2229         network_queue_room(room, NULL);
2230         return 0;
2231 }
2232
2233 /*
2234  * Module entry point
2235  */
2236 CTDL_MODULE_INIT(network)
2237 {
2238         if (!threading)
2239         {
2240                 create_spool_dirs();
2241                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2242                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2243                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2244                 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2245                 CtdlRegisterRoomHook(network_room_handler);
2246                 CtdlRegisterCleanupHook(destroy_network_queue_room);
2247         }
2248         else
2249                 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, 0);
2250         /* return our Subversion id for the Log */
2251         return "$Id$";
2252 }