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",
 789                                         mptr->remote_nodename);
 790                                 send = 0;
 791                         }
 792
 793                         /* Check for split horizon */
 794                         lprintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
 795                         bang = num_tokens(msg->cm_fields['P'], '!');
 796                         if (bang > 1) for (i=0; i<(bang-1); ++i) {
 797                                 extract_token(buf, msg->cm_fields['P'],
 798                                         i, '!', sizeof buf);
 799                                 if (!strcasecmp(buf, mptr->remote_nodename)) {
 800                                         send = 0;
 801                                 }
 802                         }
 803
 804                         /* Send the message */
 805                         if (send == 1) {
 806
 807                                 /*
 808                                  * Force the message to appear in the correct room
 809                                  * on the far end by setting the C field correctly
 810                                  */
 811                                 if (msg->cm_fields['C'] != NULL) {
 812                                         free(msg->cm_fields['C']);
 813                                 }
 814                                 if (!IsEmptyStr(mptr->remote_roomname)) {
 815                                         msg->cm_fields['C'] = strdup(mptr->remote_roomname);
 816                                 }
 817                                 else {
 818                                         msg->cm_fields['C'] = strdup(CC->room.QRname);
 819                                 }
 820
 821                                 /* serialize it for transmission */
 822                                 serialize_message(&sermsg, msg);
 823                                 if (sermsg.len > 0) {
 824
 825                                         /* write it to the spool file */
 826                                         snprintf(filename, sizeof filename,"%s/%s",
 827                                                         ctdl_netout_dir,
 828                                                         mptr->remote_nodename);
 829                                         lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
 830                                         fp = fopen(filename, "ab");
 831                                         if (fp != NULL) {
 832                                                 fwrite(sermsg.ser,
 833                                                         sermsg.len, 1, fp);
 834                                                 fclose(fp);
 835                                         }
 836                                         else {
 837                                                 lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
 838                                         }
 839
 840                                         /* free the serialized version */
 841                                         free(sermsg.ser);
 842                                 }
 843
 844                         }
 845                 }
 846                 CtdlFreeMessage(msg);
 847         }
 848
 849         /* update lastsent */
 850         sc->lastsent = msgnum;
 851
 852         /* Delete this message if delete-after-send is set */
 853         if (delete_after_send) {
 854                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 855         }
 856
 857 }
 858
 859
 860 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 861 {
 862         FILE *fp;
 863         char instr[SIZ];
 864         char buf[SIZ];
 865         char nodename[256];
 866         char roomname[ROOMNAMELEN];
 867         char nexthop[256];
 868         size_t miscsize = 0;
 869         size_t linesize = 0;
 870         int skipthisline = 0;
 871         namelist *nptr = NULL;
 872         maplist *mptr = NULL;
 873         SpoolControl *sc;
 874
 875         fp = fopen(filename, "r");
 876         if (fp == NULL) {
 877                 return 0;
 878         }
 879         sc = malloc(sizeof(SpoolControl));
 880         memset(sc, 0, sizeof(SpoolControl));
 881         *scc = sc;
 882
 883         while (fgets(buf, sizeof buf, fp) != NULL) {
 884                 buf[strlen(buf)-1] = 0;
 885
 886                 extract_token(instr, buf, 0, '|', sizeof instr);
 887                 if (!strcasecmp(instr, "lastsent")) {
 888                         sc->lastsent = extract_long(buf, 1);
 889                 }
 890                 else if (!strcasecmp(instr, "listrecp")) {
 891                         nptr = (namelist *)
 892                                 malloc(sizeof(namelist));
 893                         nptr->next = sc->listrecps;
 894                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 895                         sc->listrecps = nptr;
 896                 }
 897                 else if (!strcasecmp(instr, "participate")) {
 898                         nptr = (namelist *)
 899                                 malloc(sizeof(namelist));
 900                         nptr->next = sc->participates;
 901                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 902                         sc->participates = nptr;
 903                 }
 904                 else if (!strcasecmp(instr, "digestrecp")) {
 905                         nptr = (namelist *)
 906                                 malloc(sizeof(namelist));
 907                         nptr->next = sc->digestrecps;
 908                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 909                         sc->digestrecps = nptr;
 910                 }
 911                 else if (!strcasecmp(instr, "ignet_push_share")) {
 912                         /* by checking each node's validity, we automatically
 913                          * purge nodes which do not exist from room network
 914                          * configurations at this time.
 915                          */
 916                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 917                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 918                         strcpy(nexthop, "xxx");
 919                         if (is_valid_node(nexthop, NULL, nodename) == 0) {
 920                                 if (IsEmptyStr(nexthop)) {
 921                                         mptr = (maplist *)
 922                                                 malloc(sizeof(maplist));
 923                                         mptr->next = sc->ignet_push_shares;
 924                                         strcpy(mptr->remote_nodename, nodename);
 925                                         strcpy(mptr->remote_roomname, roomname);
 926                                         sc->ignet_push_shares = mptr;
 927                                 }
 928                         }
 929                 }
 930                 else {
 931                         /* Preserve 'other' lines ... *unless* they happen to
 932                          * be subscribe/unsubscribe pendings with expired
 933                          * timestamps.
 934                          */
 935                         skipthisline = 0;
 936                         if (!strncasecmp(buf, "subpending|", 11)) {
 937                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 938                                         skipthisline = 1;
 939                                 }
 940                         }
 941                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 942                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 943                                         skipthisline = 1;
 944                                 }
 945                         }
 946
 947                         if (skipthisline == 0) {
 948                                 linesize = strlen(buf);
 949                                 sc->misc = realloc(sc->misc,
 950                                         (miscsize + linesize + 2) );
 951                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 952                                 miscsize = miscsize + linesize + 1;
 953                         }
 954                 }
 955
 956
 957         }
 958         fclose(fp);
 959         return 1;
 960 }
 961
 962 void free_spoolcontrol_struct(SpoolControl **scc)
 963 {
 964         SpoolControl *sc;
 965         namelist *nptr = NULL;
 966         maplist *mptr = NULL;
 967
 968         sc = *scc;
 969         while (sc->listrecps != NULL) {
 970                 nptr = sc->listrecps->next;
 971                 free(sc->listrecps);
 972                 sc->listrecps = nptr;
 973         }
 974         /* Do the same for digestrecps */
 975         while (sc->digestrecps != NULL) {
 976                 nptr = sc->digestrecps->next;
 977                 free(sc->digestrecps);
 978                 sc->digestrecps = nptr;
 979         }
 980         /* Do the same for participates */
 981         while (sc->participates != NULL) {
 982                 nptr = sc->participates->next;
 983                 free(sc->participates);
 984                 sc->participates = nptr;
 985         }
 986         while (sc->ignet_push_shares != NULL) {
 987                 mptr = sc->ignet_push_shares->next;
 988                 free(sc->ignet_push_shares);
 989                 sc->ignet_push_shares = mptr;
 990         }
 991         free(sc->misc);
 992         free(sc);
 993         *scc=NULL;
 994 }
 995
 996 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 997 {
 998         FILE *fp;
 999         SpoolControl *sc;
1000         namelist *nptr = NULL;
1001         maplist *mptr = NULL;
1002
1003         sc = *scc;
1004         fp = fopen(filename, "w");
1005         if (fp == NULL) {
1006                 lprintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
1007                         filename, strerror(errno));
1008                 free_spoolcontrol_struct(scc);
1009         }
1010         else {
1011                 fprintf(fp, "lastsent|%ld\n", sc->lastsent);
1012
1013                 /* Write out the listrecps while freeing from memory at the
1014                  * same time.  Am I clever or what?  :)
1015                  */
1016                 while (sc->listrecps != NULL) {
1017                         fprintf(fp, "listrecp|%s\n", sc->listrecps->name);
1018                         nptr = sc->listrecps->next;
1019                         free(sc->listrecps);
1020                         sc->listrecps = nptr;
1021                 }
1022                 /* Do the same for digestrecps */
1023                 while (sc->digestrecps != NULL) {
1024                         fprintf(fp, "digestrecp|%s\n", sc->digestrecps->name);
1025                         nptr = sc->digestrecps->next;
1026                         free(sc->digestrecps);
1027                         sc->digestrecps = nptr;
1028                 }
1029                 /* Do the same for participates */
1030                 while (sc->participates != NULL) {
1031                         fprintf(fp, "participate|%s\n", sc->participates->name);
1032                         nptr = sc->participates->next;
1033                         free(sc->participates);
1034                         sc->participates = nptr;
1035                 }
1036                 while (sc->ignet_push_shares != NULL) {
1037                         /* by checking each node's validity, we automatically
1038                          * purge nodes which do not exist from room network
1039                          * configurations at this time.
1040                          */
1041                         if (is_valid_node(NULL, NULL, sc->ignet_push_shares->remote_nodename) == 0) {
1042                         }
1043                         fprintf(fp, "ignet_push_share|%s",
1044                                 sc->ignet_push_shares->remote_nodename);
1045                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1046                                 fprintf(fp, "|%s", sc->ignet_push_shares->remote_roomname);
1047                         }
1048                         fprintf(fp, "\n");
1049                         mptr = sc->ignet_push_shares->next;
1050                         free(sc->ignet_push_shares);
1051                         sc->ignet_push_shares = mptr;
1052                 }
1053                 if (sc->misc != NULL) {
1054                         fwrite(sc->misc, strlen(sc->misc), 1, fp);
1055                 }
1056                 free(sc->misc);
1057
1058                 fclose(fp);
1059                 free(sc);
1060                 *scc=NULL;
1061         }
1062         return 1;
1063 }
1064 int is_recipient(SpoolControl *sc, const char *Name)
1065 {
1066         namelist *nptr;
1067         size_t len;
1068
1069         len = strlen(Name);
1070         nptr = sc->listrecps;
1071         while (nptr != NULL) {
1072                 if (strncmp(Name, nptr->name, len)==0)
1073                         return 1;
1074                 nptr = nptr->next;
1075         }
1076         /* Do the same for digestrecps */
1077         nptr = sc->digestrecps;
1078         while (nptr != NULL) {
1079                 if (strncmp(Name, nptr->name, len)==0)
1080                         return 1;
1081                 nptr = nptr->next;
1082         }
1083         /* Do the same for participates */
1084         nptr = sc->participates;
1085         while (nptr != NULL) {
1086                 if (strncmp(Name, nptr->name, len)==0)
1087                         return 1;
1088                 nptr = nptr->next;
1089         }
1090         return 0;
1091 }
1092
1093
1094 /*
1095  * Batch up and send all outbound traffic from the current room
1096  */
1097 void network_spoolout_room(char *room_to_spool) {
1098         char buf[SIZ];
1099         char filename[SIZ];
1100         SpoolControl *sc;
1101         int i;
1102
1103         /*
1104          * If the room doesn't exist, don't try to perform its networking tasks.
1105          * Normally this should never happen, but once in a while maybe a room gets
1106          * queued for networking and then deleted before it can happen.
1107          */
1108         if (getroom(&CC->room, room_to_spool) != 0) {
1109                 lprintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1110                 return;
1111         }
1112
1113         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1114
1115         lprintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
1116         begin_critical_section(S_NETCONFIGS);
1117
1118         /* Only do net processing for rooms that have netconfigs */
1119
1120         if (!read_spoolcontrol_file(&sc, filename))
1121         {
1122                 end_critical_section(S_NETCONFIGS);
1123                 return;
1124         }
1125
1126         /* If there are digest recipients, we have to build a digest */
1127         if (sc->digestrecps != NULL) {
1128                 sc->digestfp = tmpfile();
1129                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1130         }
1131
1132         /* Do something useful */
1133         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1134                 network_spool_msg, sc);
1135
1136         /* If we wrote a digest, deliver it and then close it */
1137         snprintf(buf, sizeof buf, "room_%s@%s",
1138                 CC->room.QRname, config.c_fqdn);
1139         for (i=0; buf[i]; ++i) {
1140                 buf[i] = tolower(buf[i]);
1141                 if (isspace(buf[i])) buf[i] = '_';
1142         }
1143         if (sc->digestfp != NULL) {
1144                 fprintf(sc->digestfp,   " -----------------------------------"
1145                                         "------------------------------------"
1146                                         "-------\n"
1147                                         "You are subscribed to the '%s' "
1148                                         "list.\n"
1149                                         "To post to the list: %s\n",
1150                                         CC->room.QRname, buf
1151                 );
1152                 network_deliver_digest(sc);     /* deliver and close */
1153         }
1154
1155         /* Now rewrite the config file */
1156         writenfree_spoolcontrol_file (&sc, filename);
1157         end_critical_section(S_NETCONFIGS);
1158 }
1159
1160
1161
1162 /*
1163  * Send the *entire* contents of the current room to one specific network node,
1164  * ignoring anything we know about which messages have already undergone
1165  * network processing.  This can be used to bring a new node into sync.
1166  */
1167 int network_sync_to(char *target_node) {
1168         SpoolControl sc;
1169         int num_spooled = 0;
1170         int found_node = 0;
1171         char buf[256];
1172         char sc_type[256];
1173         char sc_node[256];
1174         char sc_room[256];
1175         char filename[256];
1176         FILE *fp;
1177
1178         /* Grab the configuration line we're looking for */
1179         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1180         begin_critical_section(S_NETCONFIGS);
1181         fp = fopen(filename, "r");
1182         if (fp == NULL) {
1183                 end_critical_section(S_NETCONFIGS);
1184                 return(-1);
1185         }
1186         while (fgets(buf, sizeof buf, fp) != NULL) {
1187                 buf[strlen(buf)-1] = 0;
1188                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1189                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1190                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1191                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1192                    && (!strcasecmp(sc_node, target_node)) ) {
1193                         found_node = 1;
1194
1195                         /* Concise syntax because we don't need a full linked-list */
1196                         memset(&sc, 0, sizeof(SpoolControl));
1197                         sc.ignet_push_shares = (maplist *)
1198                                 malloc(sizeof(maplist));
1199                         sc.ignet_push_shares->next = NULL;
1200                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1201                                 sc_node,
1202                                 sizeof sc.ignet_push_shares->remote_nodename);
1203                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1204                                 sc_room,
1205                                 sizeof sc.ignet_push_shares->remote_roomname);
1206                 }
1207         }
1208         fclose(fp);
1209         end_critical_section(S_NETCONFIGS);
1210
1211         if (!found_node) return(-1);
1212
1213         /* Send ALL messages */
1214         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1215                 network_spool_msg, &sc);
1216
1217         /* Concise cleanup because we know there's only one node in the sc */
1218         free(sc.ignet_push_shares);
1219
1220         lprintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1221                 num_spooled, target_node);
1222         return(num_spooled);
1223 }
1224
1225
1226 /*
1227  * Implements the NSYN command
1228  */
1229 void cmd_nsyn(char *argbuf) {
1230         int num_spooled;
1231         char target_node[256];
1232
1233         if (CtdlAccessCheck(ac_aide)) return;
1234
1235         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1236         num_spooled = network_sync_to(target_node);
1237         if (num_spooled >= 0) {
1238                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1239         }
1240         else {
1241                 cprintf("%d No such room/node share exists.\n",
1242                         ERROR + ROOM_NOT_FOUND);
1243         }
1244 }
1245
1246
1247
1248 /*
1249  * Batch up and send all outbound traffic from the current room
1250  */
1251 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1252         struct RoomProcList *ptr;
1253
1254         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1255         if (ptr == NULL) return;
1256
1257         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1258         begin_critical_section(S_RPLIST);
1259         ptr->next = rplist;
1260         rplist = ptr;
1261         end_critical_section(S_RPLIST);
1262 }
1263
1264 void destroy_network_queue_room(void)
1265 {
1266         struct RoomProcList *cur, *p;
1267         NetMap *nmcur, *nmp;
1268
1269         cur = rplist;
1270         begin_critical_section(S_RPLIST);
1271         while (cur != NULL)
1272         {
1273                 p = cur->next;
1274                 free (cur);
1275                 cur = p;
1276         }
1277         rplist = NULL;
1278         end_critical_section(S_RPLIST);
1279
1280         nmcur = the_netmap;
1281         while (nmcur != NULL)
1282         {
1283                 nmp = nmcur->next;
1284                 free (nmcur);
1285                 nmcur = nmp;
1286         }
1287         the_netmap = NULL;
1288         if (working_ignetcfg != NULL)
1289                 free (working_ignetcfg);
1290         working_ignetcfg = NULL;
1291 }
1292
1293
1294 /*
1295  * Learn topology from path fields
1296  */
1297 void network_learn_topology(char *node, char *path) {
1298         char nexthop[256];
1299         NetMap *nmptr;
1300
1301         strcpy(nexthop, "");
1302
1303         if (num_tokens(path, '!') < 3) return;
1304         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1305                 if (!strcasecmp(nmptr->nodename, node)) {
1306                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1307                         nmptr->lastcontact = time(NULL);
1308                         ++netmap_changed;
1309                         return;
1310                 }
1311         }
1312
1313         /* If we got here then it's not in the map, so add it. */
1314         nmptr = (NetMap *) malloc(sizeof (NetMap));
1315         strcpy(nmptr->nodename, node);
1316         nmptr->lastcontact = time(NULL);
1317         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1318         nmptr->next = the_netmap;
1319         the_netmap = nmptr;
1320         ++netmap_changed;
1321 }
1322
1323
1324
1325
1326 /*
1327  * Bounce a message back to the sender
1328  */
1329 void network_bounce(struct CtdlMessage *msg, char *reason) {
1330         char *oldpath = NULL;
1331         char buf[SIZ];
1332         char bouncesource[SIZ];
1333         char recipient[SIZ];
1334         struct recptypes *valid = NULL;
1335         char force_room[ROOMNAMELEN];
1336         static int serialnum = 0;
1337         size_t size;
1338
1339         lprintf(CTDL_DEBUG, "entering network_bounce()\n");
1340
1341         if (msg == NULL) return;
1342
1343         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1344
1345         /*
1346          * Give it a fresh message ID
1347          */
1348         if (msg->cm_fields['I'] != NULL) {
1349                 free(msg->cm_fields['I']);
1350         }
1351         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1352                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1353         msg->cm_fields['I'] = strdup(buf);
1354
1355         /*
1356          * FIXME ... right now we're just sending a bounce; we really want to
1357          * include the text of the bounced message.
1358          */
1359         if (msg->cm_fields['M'] != NULL) {
1360                 free(msg->cm_fields['M']);
1361         }
1362         msg->cm_fields['M'] = strdup(reason);
1363         msg->cm_format_type = 0;
1364
1365         /*
1366          * Turn the message around
1367          */
1368         if (msg->cm_fields['R'] == NULL) {
1369                 free(msg->cm_fields['R']);
1370         }
1371
1372         if (msg->cm_fields['D'] == NULL) {
1373                 free(msg->cm_fields['D']);
1374         }
1375
1376         snprintf(recipient, sizeof recipient, "%s@%s",
1377                 msg->cm_fields['A'], msg->cm_fields['N']);
1378
1379         if (msg->cm_fields['A'] == NULL) {
1380                 free(msg->cm_fields['A']);
1381         }
1382
1383         if (msg->cm_fields['N'] == NULL) {
1384                 free(msg->cm_fields['N']);
1385         }
1386
1387         if (msg->cm_fields['U'] == NULL) {
1388                 free(msg->cm_fields['U']);
1389         }
1390
1391         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1392         msg->cm_fields['N'] = strdup(config.c_nodename);
1393         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1394
1395         /* prepend our node to the path */
1396         if (msg->cm_fields['P'] != NULL) {
1397                 oldpath = msg->cm_fields['P'];
1398                 msg->cm_fields['P'] = NULL;
1399         }
1400         else {
1401                 oldpath = strdup("unknown_user");
1402         }
1403         size = strlen(oldpath) + SIZ;
1404         msg->cm_fields['P'] = malloc(size);
1405         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1406         free(oldpath);
1407
1408         /* Now submit the message */
1409         valid = validate_recipients(recipient, NULL, 0);
1410         if (valid != NULL) if (valid->num_error != 0) {
1411                 free_recipients(valid);
1412                 valid = NULL;
1413         }
1414         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1415                 strcpy(force_room, config.c_aideroom);
1416         }
1417         else {
1418                 strcpy(force_room, "");
1419         }
1420         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1421                 strcpy(force_room, config.c_aideroom);
1422         }
1423         CtdlSubmitMsg(msg, valid, force_room);
1424
1425         /* Clean up */
1426         if (valid != NULL) free_recipients(valid);
1427         CtdlFreeMessage(msg);
1428         lprintf(CTDL_DEBUG, "leaving network_bounce()\n");
1429 }
1430
1431
1432
1433
1434 /*
1435  * Process a buffer containing a single message from a single file
1436  * from the inbound queue
1437  */
1438 void network_process_buffer(char *buffer, long size) {
1439         struct CtdlMessage *msg = NULL;
1440         long pos;
1441         int field;
1442         struct recptypes *recp = NULL;
1443         char target_room[ROOMNAMELEN];
1444         struct ser_ret sermsg;
1445         char *oldpath = NULL;
1446         char filename[SIZ];
1447         FILE *fp;
1448         char nexthop[SIZ];
1449         unsigned char firstbyte;
1450         unsigned char lastbyte;
1451
1452         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
1453         firstbyte = buffer[0];
1454         lastbyte = buffer[size-1];
1455         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1456                 lprintf(CTDL_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
1457                         size, firstbyte, lastbyte);
1458                 return;
1459         }
1460
1461         /* Set default target room to trash */
1462         strcpy(target_room, TWITROOM);
1463
1464         /* Load the message into memory */
1465         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1466         memset(msg, 0, sizeof(struct CtdlMessage));
1467         msg->cm_magic = CTDLMESSAGE_MAGIC;
1468         msg->cm_anon_type = buffer[1];
1469         msg->cm_format_type = buffer[2];
1470
1471         for (pos = 3; pos < size; ++pos) {
1472                 field = buffer[pos];
1473                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1474                 pos = pos + strlen(&buffer[(int)pos]);
1475         }
1476
1477         /* Check for message routing */
1478         if (msg->cm_fields['D'] != NULL) {
1479                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1480
1481                         /* route the message */
1482                         strcpy(nexthop, "");
1483                         if (is_valid_node(nexthop, NULL,
1484                            msg->cm_fields['D']) == 0) {
1485
1486                                 /* prepend our node to the path */
1487                                 if (msg->cm_fields['P'] != NULL) {
1488                                         oldpath = msg->cm_fields['P'];
1489                                         msg->cm_fields['P'] = NULL;
1490                                 }
1491                                 else {
1492                                         oldpath = strdup("unknown_user");
1493                                 }
1494                                 size = strlen(oldpath) + SIZ;
1495                                 msg->cm_fields['P'] = malloc(size);
1496                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1497                                         config.c_nodename, oldpath);
1498                                 free(oldpath);
1499
1500                                 /* serialize the message */
1501                                 serialize_message(&sermsg, msg);
1502
1503                                 /* now send it */
1504                                 if (IsEmptyStr(nexthop)) {
1505                                         strcpy(nexthop, msg->cm_fields['D']);
1506                                 }
1507                                 snprintf(filename,
1508                                                  sizeof filename,
1509                                                  "%s/%s",
1510                                                  ctdl_netout_dir,
1511                                                  nexthop);
1512                                 lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
1513                                 fp = fopen(filename, "ab");
1514                                 if (fp != NULL) {
1515                                         fwrite(sermsg.ser,
1516                                                 sermsg.len, 1, fp);
1517                                         fclose(fp);
1518                                 }
1519                                 else {
1520                                         lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1521                                 }
1522                                 free(sermsg.ser);
1523                                 CtdlFreeMessage(msg);
1524                                 return;
1525                         }
1526
1527                         else {  /* invalid destination node name */
1528
1529                                 network_bounce(msg,
1530 "A message you sent could not be delivered due to an invalid destination node"
1531 " name.  Please check the address and try sending the message again.\n");
1532                                 msg = NULL;
1533                                 return;
1534
1535                         }
1536                 }
1537         }
1538
1539         /*
1540          * Check to see if we already have a copy of this message, and
1541          * abort its processing if so.  (We used to post a warning to Aide>
1542          * every time this happened, but the network is now so densely
1543          * connected that it's inevitable.)
1544          */
1545         if (network_usetable(msg) != 0) {
1546                 CtdlFreeMessage(msg);
1547                 return;
1548         }
1549
1550         /* Learn network topology from the path */
1551         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1552                 network_learn_topology(msg->cm_fields['N'],
1553                                         msg->cm_fields['P']);
1554         }
1555
1556         /* Is the sending node giving us a very persuasive suggestion about
1557          * which room this message should be saved in?  If so, go with that.
1558          */
1559         if (msg->cm_fields['C'] != NULL) {
1560                 safestrncpy(target_room,
1561                         msg->cm_fields['C'],
1562                         sizeof target_room);
1563         }
1564
1565         /* Otherwise, does it have a recipient?  If so, validate it... */
1566         else if (msg->cm_fields['R'] != NULL) {
1567                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1568                 if (recp != NULL) if (recp->num_error != 0) {
1569                         network_bounce(msg,
1570                                 "A message you sent could not be delivered due to an invalid address.\n"
1571                                 "Please check the address and try sending the message again.\n");
1572                         msg = NULL;
1573                         free_recipients(recp);
1574                         return;
1575                 }
1576                 strcpy(target_room, "");        /* no target room if mail */
1577         }
1578
1579         /* Our last shot at finding a home for this message is to see if
1580          * it has the O field (Originating room) set.
1581          */
1582         else if (msg->cm_fields['O'] != NULL) {
1583                 safestrncpy(target_room,
1584                         msg->cm_fields['O'],
1585                         sizeof target_room);
1586         }
1587
1588         /* Strip out fields that are only relevant during transit */
1589         if (msg->cm_fields['D'] != NULL) {
1590                 free(msg->cm_fields['D']);
1591                 msg->cm_fields['D'] = NULL;
1592         }
1593         if (msg->cm_fields['C'] != NULL) {
1594                 free(msg->cm_fields['C']);
1595                 msg->cm_fields['C'] = NULL;
1596         }
1597
1598         /* save the message into a room */
1599         if (PerformNetprocHooks(msg, target_room) == 0) {
1600                 msg->cm_flags = CM_SKIP_HOOKS;
1601                 CtdlSubmitMsg(msg, recp, target_room);
1602         }
1603         CtdlFreeMessage(msg);
1604         free_recipients(recp);
1605 }
1606
1607
1608 /*
1609  * Process a single message from a single file from the inbound queue
1610  */
1611 void network_process_message(FILE *fp, long msgstart, long msgend) {
1612         long hold_pos;
1613         long size;
1614         char *buffer;
1615
1616         hold_pos = ftell(fp);
1617         size = msgend - msgstart + 1;
1618         buffer = malloc(size);
1619         if (buffer != NULL) {
1620                 fseek(fp, msgstart, SEEK_SET);
1621                 fread(buffer, size, 1, fp);
1622                 network_process_buffer(buffer, size);
1623                 free(buffer);
1624         }
1625
1626         fseek(fp, hold_pos, SEEK_SET);
1627 }
1628
1629
1630 /*
1631  * Process a single file from the inbound queue
1632  */
1633 void network_process_file(char *filename) {
1634         FILE *fp;
1635         long msgstart = (-1L);
1636         long msgend = (-1L);
1637         long msgcur = 0L;
1638         int ch;
1639
1640
1641         fp = fopen(filename, "rb");
1642         if (fp == NULL) {
1643                 lprintf(CTDL_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1644                 return;
1645         }
1646
1647         fseek(fp, 0L, SEEK_END);
1648         lprintf(CTDL_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1649         rewind(fp);
1650
1651         /* Look for messages in the data stream and break them out */
1652         while (ch = getc(fp), ch >= 0) {
1653
1654                 if (ch == 255) {
1655                         if (msgstart >= 0L) {
1656                                 msgend = msgcur - 1;
1657                                 network_process_message(fp, msgstart, msgend);
1658                         }
1659                         msgstart = msgcur;
1660                 }
1661
1662                 ++msgcur;
1663         }
1664
1665         msgend = msgcur - 1;
1666         if (msgstart >= 0L) {
1667                 network_process_message(fp, msgstart, msgend);
1668         }
1669
1670         fclose(fp);
1671         unlink(filename);
1672 }
1673
1674
1675 /*
1676  * Process anything in the inbound queue
1677  */
1678 void network_do_spoolin(void) {
1679         DIR *dp;
1680         struct dirent *d;
1681         struct stat statbuf;
1682         char filename[256];
1683         static time_t last_spoolin_mtime = 0L;
1684
1685         /*
1686          * Check the spoolin directory's modification time.  If it hasn't
1687          * been touched, we don't need to scan it.
1688          */
1689         if (stat(ctdl_netin_dir, &statbuf)) return;
1690         if (statbuf.st_mtime == last_spoolin_mtime) {
1691                 lprintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1692                 return;
1693         }
1694         last_spoolin_mtime = statbuf.st_mtime;
1695         lprintf(CTDL_DEBUG, "network: processing inbound queue\n");
1696
1697         /*
1698          * Ok, there's something interesting in there, so scan it.
1699          */
1700         dp = opendir(ctdl_netin_dir);
1701         if (dp == NULL) return;
1702
1703         while (d = readdir(dp), d != NULL) {
1704                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1705                         snprintf(filename,
1706                                          sizeof filename,
1707                                          "%s/%s",
1708                                          ctdl_netin_dir,
1709                                          d->d_name);
1710                         network_process_file(filename);
1711                 }
1712         }
1713
1714         closedir(dp);
1715 }
1716
1717 /*
1718  * Delete any files in the outbound queue that were intended
1719  * to be sent to nodes which no longer exist.
1720  */
1721 void network_purge_spoolout(void) {
1722         DIR *dp;
1723         struct dirent *d;
1724         char filename[256];
1725         char nexthop[256];
1726         int i;
1727
1728         dp = opendir(ctdl_netout_dir);
1729         if (dp == NULL) return;
1730
1731         while (d = readdir(dp), d != NULL) {
1732                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1733                         continue;
1734                 snprintf(filename,
1735                                  sizeof filename,
1736                                  "%s/%s",
1737                                  ctdl_netout_dir,
1738                                  d->d_name);
1739
1740                 strcpy(nexthop, "");
1741                 i = is_valid_node(nexthop, NULL, d->d_name);
1742
1743                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1744                         unlink(filename);
1745                 }
1746         }
1747
1748
1749         closedir(dp);
1750 }
1751
1752
1753 /*
1754  * receive network spool from the remote system
1755  */
1756 void receive_spool(int sock, char *remote_nodename) {
1757         long download_len = 0L;
1758         long bytes_received = 0L;
1759         long bytes_copied = 0L;
1760         char buf[SIZ];
1761         static char pbuf[IGNET_PACKET_SIZE];
1762         char tempfilename[PATH_MAX];
1763         char filename[PATH_MAX];
1764         long plen;
1765         FILE *fp, *newfp;
1766
1767         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
1768         if (sock_puts(sock, "NDOP") < 0) return;
1769         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1770         lprintf(CTDL_DEBUG, "<%s\n", buf);
1771         if (buf[0] != '2') {
1772                 return;
1773         }
1774         download_len = extract_long(&buf[4], 0);
1775
1776         bytes_received = 0L;
1777         fp = fopen(tempfilename, "w");
1778         if (fp == NULL) {
1779                 lprintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1780                         strerror(errno));
1781                 return;
1782         }
1783
1784         while (bytes_received < download_len) {
1785                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1786                         bytes_received,
1787                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1788                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1789                 if (sock_puts(sock, buf) < 0) {
1790                         fclose(fp);
1791                         unlink(tempfilename);
1792                         return;
1793                 }
1794                 if (sock_getln(sock, buf, sizeof buf) < 0) {
1795                         fclose(fp);
1796                         unlink(tempfilename);
1797                         return;
1798                 }
1799                 if (buf[0] == '6') {
1800                         plen = extract_long(&buf[4], 0);
1801                         if (sock_read(sock, pbuf, plen, 1) < 0) {
1802                                 fclose(fp);
1803                                 unlink(tempfilename);
1804                                 return;
1805                         }
1806                         fwrite((char *) pbuf, plen, 1, fp);
1807                         bytes_received = bytes_received + plen;
1808                 }
1809         }
1810
1811         fclose(fp);
1812         if (sock_puts(sock, "CLOS") < 0) {
1813                 unlink(tempfilename);
1814                 return;
1815         }
1816         if (sock_getln(sock, buf, sizeof buf) < 0) {
1817                 unlink(tempfilename);
1818                 return;
1819         }
1820         if (download_len > 0) {
1821                 lprintf(CTDL_NOTICE, "Received %ld octets from <%s>\n", download_len, remote_nodename);
1822         }
1823         lprintf(CTDL_DEBUG, "%s\n", buf);
1824
1825         /* Now copy the temp file to its permanent location.
1826          * (We copy instead of link because they may be on different filesystems)
1827          */
1828         begin_critical_section(S_NETSPOOL);
1829         snprintf(filename,
1830                          sizeof filename,
1831                          "%s/%s.%ld",
1832                          ctdl_netin_dir,
1833                          remote_nodename,
1834                          (long) getpid()
1835         );
1836         fp = fopen(tempfilename, "r");
1837         if (fp != NULL) {
1838                 newfp = fopen(filename, "w");
1839                 if (newfp != NULL) {
1840                         bytes_copied = 0L;
1841                         while (bytes_copied < download_len) {
1842                                 plen = download_len - bytes_copied;
1843                                 if (plen > sizeof buf) {
1844                                         plen = sizeof buf;
1845                                 }
1846                                 fread(buf, plen, 1, fp);
1847                                 fwrite(buf, plen, 1, newfp);
1848                                 bytes_copied += plen;
1849                         }
1850                         fclose(newfp);
1851                 }
1852                 fclose(fp);
1853         }
1854         end_critical_section(S_NETSPOOL);
1855         unlink(tempfilename);
1856 }
1857
1858
1859
1860 /*
1861  * transmit network spool to the remote system
1862  */
1863 void transmit_spool(int sock, char *remote_nodename)
1864 {
1865         char buf[SIZ];
1866         char pbuf[4096];
1867         long plen;
1868         long bytes_to_write, thisblock, bytes_written;
1869         int fd;
1870         char sfname[128];
1871
1872         if (sock_puts(sock, "NUOP") < 0) return;
1873         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1874         lprintf(CTDL_DEBUG, "<%s\n", buf);
1875         if (buf[0] != '2') {
1876                 return;
1877         }
1878
1879         snprintf(sfname, sizeof sfname,
1880                          "%s/%s",
1881                          ctdl_netout_dir,
1882                          remote_nodename);
1883         fd = open(sfname, O_RDONLY);
1884         if (fd < 0) {
1885                 if (errno != ENOENT) {
1886                         lprintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1887                                 strerror(errno));
1888                 }
1889                 return;
1890         }
1891         bytes_written = 0;
1892         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1893                 bytes_to_write = plen;
1894                 while (bytes_to_write > 0L) {
1895                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1896                         if (sock_puts(sock, buf) < 0) {
1897                                 close(fd);
1898                                 return;
1899                         }
1900                         if (sock_getln(sock, buf, sizeof buf) < 0) {
1901                                 close(fd);
1902                                 return;
1903                         }
1904                         thisblock = atol(&buf[4]);
1905                         if (buf[0] == '7') {
1906                                 if (sock_write(sock, pbuf,
1907                                    (int) thisblock) < 0) {
1908                                         close(fd);
1909                                         return;
1910                                 }
1911                                 bytes_to_write -= thisblock;
1912                                 bytes_written += thisblock;
1913                         } else {
1914                                 goto ABORTUPL;
1915                         }
1916                 }
1917         }
1918
1919 ABORTUPL:
1920         close(fd);
1921         if (sock_puts(sock, "UCLS 1") < 0) return;
1922         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1923         lprintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n",
1924                         bytes_written, remote_nodename);
1925         lprintf(CTDL_DEBUG, "<%s\n", buf);
1926         if (buf[0] == '2') {
1927                 lprintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
1928                 unlink(sfname);
1929         }
1930 }
1931
1932
1933
1934 /*
1935  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1936  */
1937 void network_poll_node(char *node, char *secret, char *host, char *port) {
1938         int sock;
1939         char buf[SIZ];
1940
1941         if (network_talking_to(node, NTT_CHECK)) return;
1942         network_talking_to(node, NTT_ADD);
1943         lprintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
1944
1945         sock = sock_connect(host, port, "tcp");
1946         if (sock < 0) {
1947                 lprintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
1948                 network_talking_to(node, NTT_REMOVE);
1949                 return;
1950         }
1951
1952         lprintf(CTDL_DEBUG, "Connected!\n");
1953
1954         /* Read the server greeting */
1955         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
1956         lprintf(CTDL_DEBUG, ">%s\n", buf);
1957
1958         /* Identify ourselves */
1959         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1960         lprintf(CTDL_DEBUG, "<%s\n", buf);
1961         if (sock_puts(sock, buf) <0) goto bail;
1962         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
1963         lprintf(CTDL_DEBUG, ">%s\n", buf);
1964         if (buf[0] != '2') goto bail;
1965
1966         /* At this point we are authenticated. */
1967         receive_spool(sock, node);
1968         transmit_spool(sock, node);
1969
1970         sock_puts(sock, "QUIT");
1971 bail:   sock_close(sock);
1972         network_talking_to(node, NTT_REMOVE);
1973 }
1974
1975
1976
1977 /*
1978  * Poll other Citadel nodes and transfer inbound/outbound network data.
1979  * Set "full" to nonzero to force a poll of every node, or to zero to poll
1980  * only nodes to which we have data to send.
1981  */
1982 void network_poll_other_citadel_nodes(int full_poll) {
1983         int i;
1984         char linebuf[256];
1985         char node[SIZ];
1986         char host[256];
1987         char port[256];
1988         char secret[256];
1989         int poll = 0;
1990         char spoolfile[256];
1991
1992         if (working_ignetcfg == NULL) {
1993                 lprintf(CTDL_DEBUG, "No nodes defined - not polling\n");
1994                 return;
1995         }
1996
1997         /* Use the string tokenizer to grab one line at a time */
1998         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
1999                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2000                 extract_token(node, linebuf, 0, '|', sizeof node);
2001                 extract_token(secret, linebuf, 1, '|', sizeof secret);
2002                 extract_token(host, linebuf, 2, '|', sizeof host);
2003                 extract_token(port, linebuf, 3, '|', sizeof port);
2004                 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2005                    && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2006                         poll = full_poll;
2007                         if (poll == 0) {
2008                                 snprintf(spoolfile,
2009                                                  sizeof spoolfile,
2010                                                  "%s/%s",
2011                                                  ctdl_netout_dir,
2012                                                  node);
2013                                 if (access(spoolfile, R_OK) == 0) {
2014                                         poll = 1;
2015                                 }
2016                         }
2017                         if (poll) {
2018                                 network_poll_node(node, secret, host, port);
2019                         }
2020                 }
2021         }
2022
2023 }
2024
2025
2026
2027
2028 /*
2029  * It's ok if these directories already exist.  Just fail silently.
2030  */
2031 void create_spool_dirs(void) {
2032         mkdir(ctdl_spool_dir, 0700);
2033         chown(ctdl_spool_dir, CTDLUID, (-1));
2034         mkdir(ctdl_netin_dir, 0700);
2035         chown(ctdl_netin_dir, CTDLUID, (-1));
2036         mkdir(ctdl_netout_dir, 0700);
2037         chown(ctdl_netout_dir, CTDLUID, (-1));
2038 }
2039
2040
2041
2042
2043
2044 /*
2045  * network_do_queue()
2046  *
2047  * Run through the rooms doing various types of network stuff.
2048  */
2049 void *network_do_queue(void *args) {
2050         static time_t last_run = 0L;
2051         struct RoomProcList *ptr;
2052         int full_processing = 1;
2053
2054         /*
2055          * Run the full set of processing tasks no more frequently
2056          * than once every n seconds
2057          */
2058         if ( (time(NULL) - last_run) < config.c_net_freq ) {
2059                 full_processing = 0;
2060                 CtdlLogPrintf(CTDL_DEBUG, "Network full processing in %ld seconds.\n", config.c_net_freq - (time(NULL)- last_run));
2061         }
2062
2063         /*
2064          * This is a simple concurrency check to make sure only one queue run
2065          * is done at a time.  We could do this with a mutex, but since we
2066          * don't really require extremely fine granularity here, we'll do it
2067          * with a static variable instead.
2068          */
2069         if (doing_queue) return NULL;
2070         doing_queue = 1;
2071
2072         /* Load the IGnet Configuration into memory */
2073         load_working_ignetcfg();
2074
2075         /*
2076          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
2077          * then we poll everyone.  Otherwise we only poll nodes we have stuff
2078          * to send to.
2079          */
2080         network_poll_other_citadel_nodes(full_processing);
2081
2082         /*
2083          * Load the network map and filter list into memory.
2084          */
2085         read_network_map();
2086         filterlist = load_filter_list();
2087
2088         /*
2089          * Go ahead and run the queue
2090          */
2091         if (full_processing) {
2092                 lprintf(CTDL_DEBUG, "network: loading outbound queue\n");
2093                 ForEachRoom(network_queue_room, NULL);
2094         }
2095
2096         if (rplist != NULL) {
2097                 lprintf(CTDL_DEBUG, "network: running outbound queue\n");
2098                 while (rplist != NULL) {
2099                         char spoolroomname[ROOMNAMELEN];
2100                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2101                         begin_critical_section(S_RPLIST);
2102
2103                         /* pop this record off the list */
2104                         ptr = rplist;
2105                         rplist = rplist->next;
2106                         free(ptr);
2107
2108                         /* invalidate any duplicate entries to prevent double processing */
2109                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2110                                 if (!strcasecmp(ptr->name, spoolroomname)) {
2111                                         ptr->name[0] = 0;
2112                                 }
2113                         }
2114
2115                         end_critical_section(S_RPLIST);
2116                         if (spoolroomname[0] != 0) {
2117                                 network_spoolout_room(spoolroomname);
2118                         }
2119                 }
2120         }
2121
2122         /* If there is anything in the inbound queue, process it */
2123         network_do_spoolin();
2124
2125         /* Save the network map back to disk */
2126         write_network_map();
2127
2128         /* Free the filter list in memory */
2129         free_filter_list(filterlist);
2130         filterlist = NULL;
2131
2132         network_purge_spoolout();
2133
2134         lprintf(CTDL_DEBUG, "network: queue run completed\n");
2135
2136         if (full_processing) {
2137                 last_run = time(NULL);
2138         }
2139
2140         doing_queue = 0;
2141         CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, time(NULL) + 60);
2142         return NULL;
2143 }
2144
2145
2146 /*
2147  * cmd_netp() - authenticate to the server as another Citadel node polling
2148  *            for network traffic
2149  */
2150 void cmd_netp(char *cmdbuf)
2151 {
2152         char node[256];
2153         char pass[256];
2154         int v;
2155
2156         char secret[256];
2157         char nexthop[256];
2158
2159         /* Authenticate */
2160         extract_token(node, cmdbuf, 0, '|', sizeof node);
2161         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2162
2163         if (doing_queue) {
2164                 lprintf(CTDL_WARNING, "Network node <%s> refused - spooling", node);
2165                 cprintf("%d spooling - try again in a few minutes\n",
2166                         ERROR + RESOURCE_BUSY);
2167                 return;
2168         }
2169
2170         /* load the IGnet Configuration to check node validity */
2171         load_working_ignetcfg();
2172         v = is_valid_node(nexthop, secret, node);
2173
2174         if (v != 0) {
2175                 lprintf(CTDL_WARNING, "Unknown node <%s>\n", node);
2176                 cprintf("%d authentication failed\n",
2177                         ERROR + PASSWORD_REQUIRED);
2178                 return;
2179         }
2180
2181         if (strcasecmp(pass, secret)) {
2182                 lprintf(CTDL_WARNING, "Bad password for network node <%s>", node);
2183                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2184                 return;
2185         }
2186
2187         if (network_talking_to(node, NTT_CHECK)) {
2188                 lprintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2189                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2190                 return;
2191         }
2192
2193         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2194         network_talking_to(node, NTT_ADD);
2195         lprintf(CTDL_NOTICE, "Network node <%s> logged in\n", CC->net_node);
2196         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
2197                 CC->net_node);
2198 }
2199
2200 int network_room_handler (struct ctdlroom *room)
2201 {
2202         network_queue_room(room, NULL);
2203         return 0;
2204 }
2205
2206 /*
2207  * Module entry point
2208  */
2209 CTDL_MODULE_INIT(network)
2210 {
2211         if (!threading)
2212         {
2213                 create_spool_dirs();
2214                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2215                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2216                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2217                 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2218 //              CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
2219                 CtdlRegisterRoomHook(network_room_handler);
2220                 CtdlRegisterCleanupHook(destroy_network_queue_room);
2221         }
2222         else
2223                 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, 0);
2224         /* return our Subversion id for the Log */
2225         return "$Id$";
2226 }