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) 2000-2009 by the citadel.org team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 3 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  24  * This is a fairly high-level type of critical section.  It ensures that no
  25  * two threads work on the netconfigs files at the same time.  Since we do
  26  * so many things inside these, here are the rules:
  27  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  28  *  2. Do *not* perform any I/O with the client during these sections.
  29  *
  30  */
  31
  32 /*
  33  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  34  * requests that have not been confirmed will be deleted.
  35  */
  36 #define EXP     259200  /* three days */
  37
  38 #include "sysdep.h"
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include <stdio.h>
  42 #include <fcntl.h>
  43 #include <ctype.h>
  44 #include <signal.h>
  45 #include <pwd.h>
  46 #include <errno.h>
  47 #include <sys/stat.h>
  48 #include <sys/types.h>
  49 #include <dirent.h>
  50 #if TIME_WITH_SYS_TIME
  51 # include <sys/time.h>
  52 # include <time.h>
  53 #else
  54 # if HAVE_SYS_TIME_H
  55 #  include <sys/time.h>
  56 # else
  57 #  include <time.h>
  58 # endif
  59 #endif
  60
  61 #include <sys/wait.h>
  62 #include <string.h>
  63 #include <limits.h>
  64 #include <libcitadel.h>
  65 #include "citadel.h"
  66 #include "server.h"
  67 #include "citserver.h"
  68 #include "support.h"
  69 #include "config.h"
  70 #include "room_ops.h"
  71 #include "user_ops.h"
  72 #include "policy.h"
  73 #include "database.h"
  74 #include "msgbase.h"
  75 #include "internet_addressing.h"
  76 #include "serv_network.h"
  77 #include "clientsocket.h"
  78 #include "file_ops.h"
  79 #include "citadel_dirs.h"
  80 #include "threads.h"
  81
  82 #ifndef HAVE_SNPRINTF
  83 #include "snprintf.h"
  84 #endif
  85
  86
  87 #include "ctdl_module.h"
  88
  89
  90
  91 /* Nonzero while we are doing network processing */
  92 static int doing_queue = 0;
  93
  94 /*
  95  * When we do network processing, it's accomplished in two passes; one to
  96  * gather a list of rooms and one to actually do them.  It's ok that rplist
  97  * is global; we have a mutex that keeps it safe.
  98  */
  99 struct RoomProcList *rplist = NULL;
 100
 101 /*
 102  * We build a map of network nodes during processing.
 103  */
 104 NetMap *the_netmap = NULL;
 105 int netmap_changed = 0;
 106 char *working_ignetcfg = NULL;
 107
 108 /*
 109  * Load or refresh the Citadel network (IGnet) configuration for this node.
 110  */
 111 void load_working_ignetcfg(void) {
 112         char *cfg;
 113         char *oldcfg;
 114
 115         cfg = CtdlGetSysConfig(IGNETCFG);
 116         if (cfg == NULL) {
 117                 cfg = strdup("");
 118         }
 119
 120         oldcfg = working_ignetcfg;
 121         working_ignetcfg = cfg;
 122         if (oldcfg != NULL) {
 123                 free(oldcfg);
 124         }
 125 }
 126
 127
 128
 129
 130
 131 /*
 132  * Keep track of what messages to reject
 133  */
 134 FilterList *load_filter_list(void) {
 135         char *serialized_list = NULL;
 136         int i;
 137         char buf[SIZ];
 138         FilterList *newlist = NULL;
 139         FilterList *nptr;
 140
 141         serialized_list = CtdlGetSysConfig(FILTERLIST);
 142         if (serialized_list == NULL) return(NULL); /* if null, no entries */
 143
 144         /* Use the string tokenizer to grab one line at a time */
 145         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
 146                 extract_token(buf, serialized_list, i, '\n', sizeof buf);
 147                 nptr = (FilterList *) malloc(sizeof(FilterList));
 148                 extract_token(nptr->fl_user, buf, 0, '|', sizeof nptr->fl_user);
 149                 striplt(nptr->fl_user);
 150                 extract_token(nptr->fl_room, buf, 1, '|', sizeof nptr->fl_room);
 151                 striplt(nptr->fl_room);
 152                 extract_token(nptr->fl_node, buf, 2, '|', sizeof nptr->fl_node);
 153                 striplt(nptr->fl_node);
 154
 155                 /* Cowardly refuse to add an any/any/any entry that would
 156                  * end up filtering every single message.
 157                  */
 158                 if (IsEmptyStr(nptr->fl_user) &&
 159                     IsEmptyStr(nptr->fl_room) &&
 160                     IsEmptyStr(nptr->fl_node)) {
 161                         free(nptr);
 162                 }
 163                 else {
 164                         nptr->next = newlist;
 165                         newlist = nptr;
 166                 }
 167         }
 168
 169         free(serialized_list);
 170         return newlist;
 171 }
 172
 173
 174 void free_filter_list(FilterList *fl) {
 175         if (fl == NULL) return;
 176         free_filter_list(fl->next);
 177         free(fl);
 178 }
 179
 180
 181
 182 /*
 183  * Check the use table.  This is a list of messages which have recently
 184  * arrived on the system.  It is maintained and queried to prevent the same
 185  * message from being entered into the database multiple times if it happens
 186  * to arrive multiple times by accident.
 187  */
 188 int network_usetable(struct CtdlMessage *msg) {
 189
 190         char msgid[SIZ];
 191         struct cdbdata *cdbut;
 192         struct UseTable ut;
 193
 194         /* Bail out if we can't generate a message ID */
 195         if (msg == NULL) {
 196                 return(0);
 197         }
 198         if (msg->cm_fields['I'] == NULL) {
 199                 return(0);
 200         }
 201         if (IsEmptyStr(msg->cm_fields['I'])) {
 202                 return(0);
 203         }
 204
 205         /* Generate the message ID */
 206         strcpy(msgid, msg->cm_fields['I']);
 207         if (haschar(msgid, '@') == 0) {
 208                 strcat(msgid, "@");
 209                 if (msg->cm_fields['N'] != NULL) {
 210                         strcat(msgid, msg->cm_fields['N']);
 211                 }
 212                 else {
 213                         return(0);
 214                 }
 215         }
 216
 217         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 218         if (cdbut != NULL) {
 219                 cdb_free(cdbut);
 220                 return(1);
 221         }
 222
 223         /* If we got to this point, it's unique: add it. */
 224         strcpy(ut.ut_msgid, msgid);
 225         ut.ut_timestamp = time(NULL);
 226         cdb_store(CDB_USETABLE, msgid, strlen(msgid),
 227                 &ut, sizeof(struct UseTable) );
 228         return(0);
 229 }
 230
 231
 232 /*
 233  * Read the network map from its configuration file into memory.
 234  */
 235 void read_network_map(void) {
 236         char *serialized_map = NULL;
 237         int i;
 238         char buf[SIZ];
 239         NetMap *nmptr;
 240
 241         serialized_map = CtdlGetSysConfig(IGNETMAP);
 242         if (serialized_map == NULL) return;     /* if null, no entries */
 243
 244         /* Use the string tokenizer to grab one line at a time */
 245         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 246                 extract_token(buf, serialized_map, i, '\n', sizeof buf);
 247                 nmptr = (NetMap *) malloc(sizeof(NetMap));
 248                 extract_token(nmptr->nodename, buf, 0, '|', sizeof nmptr->nodename);
 249                 nmptr->lastcontact = extract_long(buf, 1);
 250                 extract_token(nmptr->nexthop, buf, 2, '|', sizeof nmptr->nexthop);
 251                 nmptr->next = the_netmap;
 252                 the_netmap = nmptr;
 253         }
 254
 255         free(serialized_map);
 256         netmap_changed = 0;
 257 }
 258
 259
 260 /*
 261  * Write the network map from memory back to the configuration file.
 262  */
 263 void write_network_map(void) {
 264         char *serialized_map = NULL;
 265         NetMap *nmptr;
 266
 267
 268         if (netmap_changed) {
 269                 serialized_map = strdup("");
 270
 271                 if (the_netmap != NULL) {
 272                         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 273                                 serialized_map = realloc(serialized_map,
 274                                                         (strlen(serialized_map)+SIZ) );
 275                                 if (!IsEmptyStr(nmptr->nodename)) {
 276                                         snprintf(&serialized_map[strlen(serialized_map)],
 277                                                 SIZ,
 278                                                 "%s|%ld|%s\n",
 279                                                 nmptr->nodename,
 280                                                 (long)nmptr->lastcontact,
 281                                                 nmptr->nexthop);
 282                                 }
 283                         }
 284                 }
 285
 286                 CtdlPutSysConfig(IGNETMAP, serialized_map);
 287                 free(serialized_map);
 288         }
 289
 290         /* Now free the list */
 291         while (the_netmap != NULL) {
 292                 nmptr = the_netmap->next;
 293                 free(the_netmap);
 294                 the_netmap = nmptr;
 295         }
 296         netmap_changed = 0;
 297 }
 298
 299
 300
 301 /*
 302  * Check the network map and determine whether the supplied node name is
 303  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 304  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 305  * shared secret.
 306  */
 307 int is_valid_node(char *nexthop, char *secret, char *node) {
 308         int i;
 309         char linebuf[SIZ];
 310         char buf[SIZ];
 311         int retval;
 312         NetMap *nmptr;
 313
 314         if (node == NULL) {
 315                 return(-1);
 316         }
 317
 318         /*
 319          * First try the neighbor nodes
 320          */
 321         if (working_ignetcfg == NULL) {
 322                 CtdlLogPrintf(CTDL_ERR, "working_ignetcfg is NULL!\n");
 323                 if (nexthop != NULL) {
 324                         strcpy(nexthop, "");
 325                 }
 326                 return(-1);
 327         }
 328
 329         retval = (-1);
 330         if (nexthop != NULL) {
 331                 strcpy(nexthop, "");
 332         }
 333
 334         /* Use the string tokenizer to grab one line at a time */
 335         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
 336                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
 337                 extract_token(buf, linebuf, 0, '|', sizeof buf);
 338                 if (!strcasecmp(buf, node)) {
 339                         if (nexthop != NULL) {
 340                                 strcpy(nexthop, "");
 341                         }
 342                         if (secret != NULL) {
 343                                 extract_token(secret, linebuf, 1, '|', 256);
 344                         }
 345                         retval = 0;
 346                 }
 347         }
 348
 349         if (retval == 0) {
 350                 return(retval);         /* yup, it's a direct neighbor */
 351         }
 352
 353         /*
 354          * If we get to this point we have to see if we know the next hop
 355          */
 356         if (the_netmap != NULL) {
 357                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 358                         if (!strcasecmp(nmptr->nodename, node)) {
 359                                 if (nexthop != NULL) {
 360                                         strcpy(nexthop, nmptr->nexthop);
 361                                 }
 362                                 return(0);
 363                         }
 364                 }
 365         }
 366
 367         /*
 368          * If we get to this point, the supplied node name is bogus.
 369          */
 370         CtdlLogPrintf(CTDL_ERR, "Invalid node name <%s>\n", node);
 371         return(-1);
 372 }
 373
 374
 375
 376
 377
 378 void cmd_gnet(char *argbuf) {
 379         char filename[PATH_MAX];
 380         char buf[SIZ];
 381         FILE *fp;
 382
 383         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 384                 /* users can edit the netconfigs for their own mailbox rooms */
 385         }
 386         else if (CtdlAccessCheck(ac_room_aide)) return;
 387
 388         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 389         cprintf("%d Network settings for room #%ld <%s>\n",
 390                 LISTING_FOLLOWS,
 391                 CC->room.QRnumber, CC->room.QRname);
 392
 393         fp = fopen(filename, "r");
 394         if (fp != NULL) {
 395                 while (fgets(buf, sizeof buf, fp) != NULL) {
 396                         buf[strlen(buf)-1] = 0;
 397                         cprintf("%s\n", buf);
 398                 }
 399                 fclose(fp);
 400         }
 401
 402         cprintf("000\n");
 403 }
 404
 405
 406 void cmd_snet(char *argbuf) {
 407         char tempfilename[PATH_MAX];
 408         char filename[PATH_MAX];
 409         char buf[SIZ];
 410         FILE *fp, *newfp;
 411
 412         unbuffer_output();
 413
 414         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 415                 /* users can edit the netconfigs for their own mailbox rooms */
 416         }
 417         else if (CtdlAccessCheck(ac_room_aide)) return;
 418
 419         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
 420         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 421
 422         fp = fopen(tempfilename, "w");
 423         if (fp == NULL) {
 424                 cprintf("%d Cannot open %s: %s\n",
 425                         ERROR + INTERNAL_ERROR,
 426                         tempfilename,
 427                         strerror(errno));
 428         }
 429
 430         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 431         while (client_getln(buf, sizeof buf) >= 0 && strcmp(buf, "000")) {
 432                 fprintf(fp, "%s\n", buf);
 433         }
 434         fclose(fp);
 435
 436         /* Now copy the temp file to its permanent location.
 437          * (We copy instead of link because they may be on different filesystems)
 438          */
 439         begin_critical_section(S_NETCONFIGS);
 440         fp = fopen(tempfilename, "r");
 441         if (fp != NULL) {
 442                 newfp = fopen(filename, "w");
 443                 if (newfp != NULL) {
 444                         while (fgets(buf, sizeof buf, fp) != NULL) {
 445                                 fprintf(newfp, "%s", buf);
 446                         }
 447                         fclose(newfp);
 448                 }
 449                 fclose(fp);
 450         }
 451         end_critical_section(S_NETCONFIGS);
 452         unlink(tempfilename);
 453 }
 454
 455
 456 /*
 457  * Deliver digest messages
 458  */
 459 void network_deliver_digest(SpoolControl *sc) {
 460         char buf[SIZ];
 461         int i;
 462         struct CtdlMessage *msg = NULL;
 463         long msglen;
 464         char *recps = NULL;
 465         size_t recps_len = SIZ;
 466         struct recptypes *valid;
 467         namelist *nptr;
 468         char bounce_to[256];
 469
 470         if (sc->num_msgs_spooled < 1) {
 471                 fclose(sc->digestfp);
 472                 sc->digestfp = NULL;
 473                 return;
 474         }
 475
 476         msg = malloc(sizeof(struct CtdlMessage));
 477         memset(msg, 0, sizeof(struct CtdlMessage));
 478         msg->cm_magic = CTDLMESSAGE_MAGIC;
 479         msg->cm_format_type = FMT_RFC822;
 480         msg->cm_anon_type = MES_NORMAL;
 481
 482         sprintf(buf, "%ld", time(NULL));
 483         msg->cm_fields['T'] = strdup(buf);
 484         msg->cm_fields['A'] = strdup(CC->room.QRname);
 485         snprintf(buf, sizeof buf, "[%s]", CC->room.QRname);
 486         msg->cm_fields['U'] = strdup(buf);
 487         sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
 488         for (i=0; buf[i]; ++i) {
 489                 if (isspace(buf[i])) buf[i]='_';
 490                 buf[i] = tolower(buf[i]);
 491         }
 492         msg->cm_fields['F'] = strdup(buf);
 493         msg->cm_fields['R'] = strdup(buf);
 494
 495         /* Set the 'List-ID' header */
 496         msg->cm_fields['L'] = malloc(1024);
 497         snprintf(msg->cm_fields['L'], 1024,
 498                 "%s <%ld.list-id.%s>",
 499                 CC->room.QRname,
 500                 CC->room.QRnumber,
 501                 config.c_fqdn
 502         );
 503
 504         /*
 505          * Go fetch the contents of the digest
 506          */
 507         fseek(sc->digestfp, 0L, SEEK_END);
 508         msglen = ftell(sc->digestfp);
 509
 510         msg->cm_fields['M'] = malloc(msglen + 1);
 511         fseek(sc->digestfp, 0L, SEEK_SET);
 512         fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 513         msg->cm_fields['M'][msglen] = 0;
 514
 515         fclose(sc->digestfp);
 516         sc->digestfp = NULL;
 517
 518         /* Now generate the delivery instructions */
 519
 520         /*
 521          * Figure out how big a buffer we need to allocate
 522          */
 523         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 524                 recps_len = recps_len + strlen(nptr->name) + 2;
 525         }
 526
 527         recps = malloc(recps_len);
 528
 529         if (recps == NULL) {
 530                 CtdlLogPrintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 531                 abort();
 532         }
 533
 534         strcpy(recps, "");
 535
 536         /* Each recipient */
 537         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 538                 if (nptr != sc->digestrecps) {
 539                         strcat(recps, ",");
 540                 }
 541                 strcat(recps, nptr->name);
 542         }
 543
 544         /* Where do we want bounces and other noise to be heard?  Surely not the list members! */
 545         snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
 546
 547         /* Now submit the message */
 548         valid = validate_recipients(recps, NULL, 0);
 549         free(recps);
 550         if (valid != NULL) {
 551                 valid->bounce_to = strdup(bounce_to);
 552                 valid->envelope_from = strdup(bounce_to);
 553                 CtdlSubmitMsg(msg, valid, NULL, 0);
 554         }
 555         CtdlFreeMessage(msg);
 556         free_recipients(valid);
 557 }
 558
 559
 560 /*
 561  * Deliver list messages to everyone on the list ... efficiently
 562  */
 563 void network_deliver_list(struct CtdlMessage *msg, SpoolControl *sc) {
 564         char *recps = NULL;
 565         size_t recps_len = SIZ;
 566         struct recptypes *valid;
 567         namelist *nptr;
 568         char bounce_to[256];
 569
 570         /* Don't do this if there were no recipients! */
 571         if (sc->listrecps == NULL) return;
 572
 573         /* Now generate the delivery instructions */
 574
 575         /*
 576          * Figure out how big a buffer we need to allocate
 577          */
 578         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 579                 recps_len = recps_len + strlen(nptr->name) + 2;
 580         }
 581
 582         recps = malloc(recps_len);
 583
 584         if (recps == NULL) {
 585                 CtdlLogPrintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 586                 abort();
 587         }
 588
 589         strcpy(recps, "");
 590
 591         /* Each recipient */
 592         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 593                 if (nptr != sc->listrecps) {
 594                         strcat(recps, ",");
 595                 }
 596                 strcat(recps, nptr->name);
 597         }
 598
 599         /* Where do we want bounces and other noise to be heard?  Surely not the list members! */
 600         snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
 601
 602         /* Now submit the message */
 603         valid = validate_recipients(recps, NULL, 0);
 604         free(recps);
 605         if (valid != NULL) {
 606                 valid->bounce_to = strdup(bounce_to);
 607                 valid->envelope_from = strdup(bounce_to);
 608                 CtdlSubmitMsg(msg, valid, NULL, 0);
 609                 free_recipients(valid);
 610         }
 611         /* Do not call CtdlFreeMessage(msg) here; the caller will free it. */
 612 }
 613
 614
 615
 616
 617 /*
 618  * Spools out one message from the list.
 619  */
 620 void network_spool_msg(long msgnum, void *userdata) {
 621         SpoolControl *sc;
 622         int i;
 623         char *newpath = NULL;
 624         size_t instr_len = SIZ;
 625         struct CtdlMessage *msg = NULL;
 626         namelist *nptr;
 627         maplist *mptr;
 628         struct ser_ret sermsg;
 629         FILE *fp;
 630         char filename[PATH_MAX];
 631         char buf[SIZ];
 632         int bang = 0;
 633         int send = 1;
 634         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 635         int ok_to_participate = 0;
 636         struct recptypes *valid;
 637
 638         sc = (SpoolControl *)userdata;
 639
 640         /*
 641          * Process mailing list recipients
 642          */
 643         instr_len = SIZ;
 644         if (sc->listrecps != NULL) {
 645                 /* Fetch the message.  We're going to need to modify it
 646                  * in order to insert the [list name] in it, etc.
 647                  */
 648                 msg = CtdlFetchMessage(msgnum, 1);
 649                 if (msg != NULL) {
 650
 651                         /* Set the 'List-ID' header */
 652                         if (msg->cm_fields['L'] != NULL) {
 653                                 free(msg->cm_fields['L']);
 654                         }
 655                         msg->cm_fields['L'] = malloc(1024);
 656                         snprintf(msg->cm_fields['L'], 1024,
 657                                 "%s <%ld.list-id.%s>",
 658                                 CC->room.QRname,
 659                                 CC->room.QRnumber,
 660                                 config.c_fqdn
 661                         );
 662
 663                         /* Prepend "[List name]" to the subject */
 664                         if (msg->cm_fields['U'] == NULL) {
 665                                 msg->cm_fields['U'] = strdup("(no subject)");
 666                         }
 667                         snprintf(buf, sizeof buf, "[%s] %s", CC->room.QRname, msg->cm_fields['U']);
 668                         free(msg->cm_fields['U']);
 669                         msg->cm_fields['U'] = strdup(buf);
 670
 671                         /* Set the recipient of the list message to the
 672                          * email address of the room itself.
 673                          * FIXME ... I want to be able to pick any address
 674                          */
 675                         if (msg->cm_fields['R'] != NULL) {
 676                                 free(msg->cm_fields['R']);
 677                         }
 678                         msg->cm_fields['R'] = malloc(256);
 679                         snprintf(msg->cm_fields['R'], 256,
 680                                 "room_%s@%s", CC->room.QRname,
 681                                 config.c_fqdn);
 682                         for (i=0; msg->cm_fields['R'][i]; ++i) {
 683                                 if (isspace(msg->cm_fields['R'][i])) {
 684                                         msg->cm_fields['R'][i] = '_';
 685                                 }
 686                         }
 687
 688                         /* Handle delivery */
 689                         network_deliver_list(msg, sc);
 690                         CtdlFreeMessage(msg);
 691                 }
 692         }
 693
 694         /*
 695          * Process digest recipients
 696          */
 697         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 698                 msg = CtdlFetchMessage(msgnum, 1);
 699                 if (msg != NULL) {
 700                         fprintf(sc->digestfp,   " -----------------------------------"
 701                                                 "------------------------------------"
 702                                                 "-------\n");
 703                         fprintf(sc->digestfp, "From: ");
 704                         if (msg->cm_fields['A'] != NULL) {
 705                                 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
 706                         }
 707                         if (msg->cm_fields['F'] != NULL) {
 708                                 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
 709                         }
 710                         else if (msg->cm_fields['N'] != NULL) {
 711                                 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
 712                         }
 713                         fprintf(sc->digestfp, "\n");
 714                         if (msg->cm_fields['U'] != NULL) {
 715                                 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
 716                         }
 717
 718                         CC->redirect_buffer = malloc(SIZ);
 719                         CC->redirect_len = 0;
 720                         CC->redirect_alloc = SIZ;
 721
 722                         safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
 723                         CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
 724
 725                         striplt(CC->redirect_buffer);
 726                         fprintf(sc->digestfp, "\n%s\n", CC->redirect_buffer);
 727
 728                         free(CC->redirect_buffer);
 729                         CC->redirect_buffer = NULL;
 730                         CC->redirect_len = 0;
 731                         CC->redirect_alloc = 0;
 732
 733                         sc->num_msgs_spooled += 1;
 734                         free(msg);
 735                 }
 736         }
 737
 738         /*
 739          * Process client-side list participations for this room
 740          */
 741         instr_len = SIZ;
 742         if (sc->participates != NULL) {
 743                 msg = CtdlFetchMessage(msgnum, 1);
 744                 if (msg != NULL) {
 745
 746                         /* Only send messages which originated on our own Citadel
 747                          * network, otherwise we'll end up sending the remote
 748                          * mailing list's messages back to it, which is rude...
 749                          */
 750                         ok_to_participate = 0;
 751                         if (msg->cm_fields['N'] != NULL) {
 752                                 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
 753                                         ok_to_participate = 1;
 754                                 }
 755                                 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
 756                                         ok_to_participate = 1;
 757                                 }
 758                         }
 759                         if (ok_to_participate) {
 760                                 if (msg->cm_fields['F'] != NULL) {
 761                                         free(msg->cm_fields['F']);
 762                                 }
 763                                 msg->cm_fields['F'] = malloc(SIZ);
 764                                 /* Replace the Internet email address of the actual
 765                                 * author with the email address of the room itself,
 766                                 * so the remote listserv doesn't reject us.
 767                                 * FIXME ... I want to be able to pick any address
 768                                 */
 769                                 snprintf(msg->cm_fields['F'], SIZ,
 770                                         "room_%s@%s", CC->room.QRname,
 771                                         config.c_fqdn);
 772                                 for (i=0; msg->cm_fields['F'][i]; ++i) {
 773                                         if (isspace(msg->cm_fields['F'][i])) {
 774                                                 msg->cm_fields['F'][i] = '_';
 775                                         }
 776                                 }
 777
 778                                 /*
 779                                  * Figure out how big a buffer we need to allocate
 780                                  */
 781                                 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
 782
 783                                         if (msg->cm_fields['R'] == NULL) {
 784                                                 free(msg->cm_fields['R']);
 785                                         }
 786                                         msg->cm_fields['R'] = strdup(nptr->name);
 787
 788                                         valid = validate_recipients(nptr->name, NULL, 0);
 789                                         CtdlSubmitMsg(msg, valid, "", 0);
 790                                         free_recipients(valid);
 791                                 }
 792
 793                         }
 794                         CtdlFreeMessage(msg);
 795                 }
 796         }
 797
 798         /*
 799          * Process IGnet push shares
 800          */
 801         msg = CtdlFetchMessage(msgnum, 1);
 802         if (msg != NULL) {
 803                 size_t newpath_len;
 804
 805                 /* Prepend our node name to the Path field whenever
 806                  * sending a message to another IGnet node
 807                  */
 808                 if (msg->cm_fields['P'] == NULL) {
 809                         msg->cm_fields['P'] = strdup("username");
 810                 }
 811                 newpath_len = strlen(msg->cm_fields['P']) +
 812                          strlen(config.c_nodename) + 2;
 813                 newpath = malloc(newpath_len);
 814                 snprintf(newpath, newpath_len, "%s!%s",
 815                          config.c_nodename, msg->cm_fields['P']);
 816                 free(msg->cm_fields['P']);
 817                 msg->cm_fields['P'] = newpath;
 818
 819                 /*
 820                  * Determine if this message is set to be deleted
 821                  * after sending out on the network
 822                  */
 823                 if (msg->cm_fields['S'] != NULL) {
 824                         if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
 825                                 delete_after_send = 1;
 826                         }
 827                 }
 828
 829                 /* Now send it to every node */
 830                 if (sc->ignet_push_shares != NULL)
 831                   for (mptr = sc->ignet_push_shares; mptr != NULL;
 832                     mptr = mptr->next) {
 833
 834                         send = 1;
 835
 836                         /* Check for valid node name */
 837                         if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
 838                                 CtdlLogPrintf(CTDL_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
 839                                 send = 0;
 840                         }
 841
 842                         /* Check for split horizon */
 843                         CtdlLogPrintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
 844                         bang = num_tokens(msg->cm_fields['P'], '!');
 845                         if (bang > 1) for (i=0; i<(bang-1); ++i) {
 846                                 extract_token(buf, msg->cm_fields['P'], i, '!', sizeof buf);
 847                                 CtdlLogPrintf(CTDL_DEBUG, "Compare <%s> to <%s>\n",
 848                                         buf, mptr->remote_nodename) ;
 849                                 if (!strcasecmp(buf, mptr->remote_nodename)) {
 850                                         send = 0;
 851                                         CtdlLogPrintf(CTDL_DEBUG, "Not sending to %s\n",
 852                                                 mptr->remote_nodename);
 853                                 }
 854                                 else {
 855                                         CtdlLogPrintf(CTDL_DEBUG, "Sending to %s\n", mptr->remote_nodename);
 856                                 }
 857                         }
 858
 859                         /* Send the message */
 860                         if (send == 1) {
 861
 862                                 /*
 863                                  * Force the message to appear in the correct room
 864                                  * on the far end by setting the C field correctly
 865                                  */
 866                                 if (msg->cm_fields['C'] != NULL) {
 867                                         free(msg->cm_fields['C']);
 868                                 }
 869                                 if (!IsEmptyStr(mptr->remote_roomname)) {
 870                                         msg->cm_fields['C'] = strdup(mptr->remote_roomname);
 871                                 }
 872                                 else {
 873                                         msg->cm_fields['C'] = strdup(CC->room.QRname);
 874                                 }
 875
 876                                 /* serialize it for transmission */
 877                                 serialize_message(&sermsg, msg);
 878                                 if (sermsg.len > 0) {
 879
 880                                         /* write it to the spool file */
 881                                         snprintf(filename, sizeof filename,"%s/%s",
 882                                                         ctdl_netout_dir,
 883                                                         mptr->remote_nodename);
 884                                         CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
 885                                         fp = fopen(filename, "ab");
 886                                         if (fp != NULL) {
 887                                                 fwrite(sermsg.ser,
 888                                                         sermsg.len, 1, fp);
 889                                                 fclose(fp);
 890                                         }
 891                                         else {
 892                                                 CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
 893                                         }
 894
 895                                         /* free the serialized version */
 896                                         free(sermsg.ser);
 897                                 }
 898
 899                         }
 900                 }
 901                 CtdlFreeMessage(msg);
 902         }
 903
 904         /* update lastsent */
 905         sc->lastsent = msgnum;
 906
 907         /* Delete this message if delete-after-send is set */
 908         if (delete_after_send) {
 909                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 910         }
 911
 912 }
 913
 914
 915 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 916 {
 917         FILE *fp;
 918         char instr[SIZ];
 919         char buf[SIZ];
 920         char nodename[256];
 921         char roomname[ROOMNAMELEN];
 922         size_t miscsize = 0;
 923         size_t linesize = 0;
 924         int skipthisline = 0;
 925         namelist *nptr = NULL;
 926         maplist *mptr = NULL;
 927         SpoolControl *sc;
 928
 929         fp = fopen(filename, "r");
 930         if (fp == NULL) {
 931                 return 0;
 932         }
 933         sc = malloc(sizeof(SpoolControl));
 934         memset(sc, 0, sizeof(SpoolControl));
 935         *scc = sc;
 936
 937         while (fgets(buf, sizeof buf, fp) != NULL) {
 938                 buf[strlen(buf)-1] = 0;
 939
 940                 extract_token(instr, buf, 0, '|', sizeof instr);
 941                 if (!strcasecmp(instr, "lastsent")) {
 942                         sc->lastsent = extract_long(buf, 1);
 943                 }
 944                 else if (!strcasecmp(instr, "listrecp")) {
 945                         nptr = (namelist *)
 946                                 malloc(sizeof(namelist));
 947                         nptr->next = sc->listrecps;
 948                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 949                         sc->listrecps = nptr;
 950                 }
 951                 else if (!strcasecmp(instr, "participate")) {
 952                         nptr = (namelist *)
 953                                 malloc(sizeof(namelist));
 954                         nptr->next = sc->participates;
 955                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 956                         sc->participates = nptr;
 957                 }
 958                 else if (!strcasecmp(instr, "digestrecp")) {
 959                         nptr = (namelist *)
 960                                 malloc(sizeof(namelist));
 961                         nptr->next = sc->digestrecps;
 962                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 963                         sc->digestrecps = nptr;
 964                 }
 965                 else if (!strcasecmp(instr, "ignet_push_share")) {
 966                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 967                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 968                         mptr = (maplist *) malloc(sizeof(maplist));
 969                         mptr->next = sc->ignet_push_shares;
 970                         strcpy(mptr->remote_nodename, nodename);
 971                         strcpy(mptr->remote_roomname, roomname);
 972                         sc->ignet_push_shares = mptr;
 973                 }
 974                 else {
 975                         /* Preserve 'other' lines ... *unless* they happen to
 976                          * be subscribe/unsubscribe pendings with expired
 977                          * timestamps.
 978                          */
 979                         skipthisline = 0;
 980                         if (!strncasecmp(buf, "subpending|", 11)) {
 981                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 982                                         skipthisline = 1;
 983                                 }
 984                         }
 985                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 986                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 987                                         skipthisline = 1;
 988                                 }
 989                         }
 990
 991                         if (skipthisline == 0) {
 992                                 linesize = strlen(buf);
 993                                 sc->misc = realloc(sc->misc,
 994                                         (miscsize + linesize + 2) );
 995                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
 996                                 miscsize = miscsize + linesize + 1;
 997                         }
 998                 }
 999
1000
1001         }
1002         fclose(fp);
1003         return 1;
1004 }
1005
1006 void free_spoolcontrol_struct(SpoolControl **scc)
1007 {
1008         SpoolControl *sc;
1009         namelist *nptr = NULL;
1010         maplist *mptr = NULL;
1011
1012         sc = *scc;
1013         while (sc->listrecps != NULL) {
1014                 nptr = sc->listrecps->next;
1015                 free(sc->listrecps);
1016                 sc->listrecps = nptr;
1017         }
1018         /* Do the same for digestrecps */
1019         while (sc->digestrecps != NULL) {
1020                 nptr = sc->digestrecps->next;
1021                 free(sc->digestrecps);
1022                 sc->digestrecps = nptr;
1023         }
1024         /* Do the same for participates */
1025         while (sc->participates != NULL) {
1026                 nptr = sc->participates->next;
1027                 free(sc->participates);
1028                 sc->participates = nptr;
1029         }
1030         while (sc->ignet_push_shares != NULL) {
1031                 mptr = sc->ignet_push_shares->next;
1032                 free(sc->ignet_push_shares);
1033                 sc->ignet_push_shares = mptr;
1034         }
1035         free(sc->misc);
1036         free(sc);
1037         *scc=NULL;
1038 }
1039
1040 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
1041 {
1042         FILE *fp;
1043         SpoolControl *sc;
1044         namelist *nptr = NULL;
1045         maplist *mptr = NULL;
1046
1047         sc = *scc;
1048         fp = fopen(filename, "w");
1049         if (fp == NULL) {
1050                 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
1051                         filename, strerror(errno));
1052                 free_spoolcontrol_struct(scc);
1053         }
1054         else {
1055                 fprintf(fp, "lastsent|%ld\n", sc->lastsent);
1056
1057                 /* Write out the listrecps while freeing from memory at the
1058                  * same time.  Am I clever or what?  :)
1059                  */
1060                 while (sc->listrecps != NULL) {
1061                         fprintf(fp, "listrecp|%s\n", sc->listrecps->name);
1062                         nptr = sc->listrecps->next;
1063                         free(sc->listrecps);
1064                         sc->listrecps = nptr;
1065                 }
1066                 /* Do the same for digestrecps */
1067                 while (sc->digestrecps != NULL) {
1068                         fprintf(fp, "digestrecp|%s\n", sc->digestrecps->name);
1069                         nptr = sc->digestrecps->next;
1070                         free(sc->digestrecps);
1071                         sc->digestrecps = nptr;
1072                 }
1073                 /* Do the same for participates */
1074                 while (sc->participates != NULL) {
1075                         fprintf(fp, "participate|%s\n", sc->participates->name);
1076                         nptr = sc->participates->next;
1077                         free(sc->participates);
1078                         sc->participates = nptr;
1079                 }
1080                 while (sc->ignet_push_shares != NULL) {
1081                         fprintf(fp, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1082                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1083                                 fprintf(fp, "|%s", sc->ignet_push_shares->remote_roomname);
1084                         }
1085                         fprintf(fp, "\n");
1086                         mptr = sc->ignet_push_shares->next;
1087                         free(sc->ignet_push_shares);
1088                         sc->ignet_push_shares = mptr;
1089                 }
1090                 if (sc->misc != NULL) {
1091                         fwrite(sc->misc, strlen(sc->misc), 1, fp);
1092                 }
1093                 free(sc->misc);
1094
1095                 fclose(fp);
1096                 free(sc);
1097                 *scc=NULL;
1098         }
1099         return 1;
1100 }
1101 int is_recipient(SpoolControl *sc, const char *Name)
1102 {
1103         namelist *nptr;
1104         size_t len;
1105
1106         len = strlen(Name);
1107         nptr = sc->listrecps;
1108         while (nptr != NULL) {
1109                 if (strncmp(Name, nptr->name, len)==0)
1110                         return 1;
1111                 nptr = nptr->next;
1112         }
1113         /* Do the same for digestrecps */
1114         nptr = sc->digestrecps;
1115         while (nptr != NULL) {
1116                 if (strncmp(Name, nptr->name, len)==0)
1117                         return 1;
1118                 nptr = nptr->next;
1119         }
1120         /* Do the same for participates */
1121         nptr = sc->participates;
1122         while (nptr != NULL) {
1123                 if (strncmp(Name, nptr->name, len)==0)
1124                         return 1;
1125                 nptr = nptr->next;
1126         }
1127         return 0;
1128 }
1129
1130
1131 /*
1132  * Batch up and send all outbound traffic from the current room
1133  */
1134 void network_spoolout_room(char *room_to_spool) {
1135         char buf[SIZ];
1136         char filename[PATH_MAX];
1137         SpoolControl *sc;
1138         int i;
1139
1140         /*
1141          * If the room doesn't exist, don't try to perform its networking tasks.
1142          * Normally this should never happen, but once in a while maybe a room gets
1143          * queued for networking and then deleted before it can happen.
1144          */
1145         if (getroom(&CC->room, room_to_spool) != 0) {
1146                 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1147                 return;
1148         }
1149
1150         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1151         begin_critical_section(S_NETCONFIGS);
1152
1153         /* Only do net processing for rooms that have netconfigs */
1154         if (!read_spoolcontrol_file(&sc, filename))
1155         {
1156                 end_critical_section(S_NETCONFIGS);
1157                 return;
1158         }
1159         CtdlLogPrintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
1160
1161         /* If there are digest recipients, we have to build a digest */
1162         if (sc->digestrecps != NULL) {
1163                 sc->digestfp = tmpfile();
1164                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1165         }
1166
1167         /* Do something useful */
1168         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1169                 network_spool_msg, sc);
1170
1171         /* If we wrote a digest, deliver it and then close it */
1172         snprintf(buf, sizeof buf, "room_%s@%s",
1173                 CC->room.QRname, config.c_fqdn);
1174         for (i=0; buf[i]; ++i) {
1175                 buf[i] = tolower(buf[i]);
1176                 if (isspace(buf[i])) buf[i] = '_';
1177         }
1178         if (sc->digestfp != NULL) {
1179                 fprintf(sc->digestfp,   " -----------------------------------"
1180                                         "------------------------------------"
1181                                         "-------\n"
1182                                         "You are subscribed to the '%s' "
1183                                         "list.\n"
1184                                         "To post to the list: %s\n",
1185                                         CC->room.QRname, buf
1186                 );
1187                 network_deliver_digest(sc);     /* deliver and close */
1188         }
1189
1190         /* Now rewrite the config file */
1191         writenfree_spoolcontrol_file (&sc, filename);
1192         end_critical_section(S_NETCONFIGS);
1193 }
1194
1195
1196
1197 /*
1198  * Send the *entire* contents of the current room to one specific network node,
1199  * ignoring anything we know about which messages have already undergone
1200  * network processing.  This can be used to bring a new node into sync.
1201  */
1202 int network_sync_to(char *target_node) {
1203         SpoolControl sc;
1204         int num_spooled = 0;
1205         int found_node = 0;
1206         char buf[256];
1207         char sc_type[256];
1208         char sc_node[256];
1209         char sc_room[256];
1210         char filename[PATH_MAX];
1211         FILE *fp;
1212
1213         /* Grab the configuration line we're looking for */
1214         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1215         begin_critical_section(S_NETCONFIGS);
1216         fp = fopen(filename, "r");
1217         if (fp == NULL) {
1218                 end_critical_section(S_NETCONFIGS);
1219                 return(-1);
1220         }
1221         while (fgets(buf, sizeof buf, fp) != NULL) {
1222                 buf[strlen(buf)-1] = 0;
1223                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1224                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1225                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1226                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1227                    && (!strcasecmp(sc_node, target_node)) ) {
1228                         found_node = 1;
1229
1230                         /* Concise syntax because we don't need a full linked-list */
1231                         memset(&sc, 0, sizeof(SpoolControl));
1232                         sc.ignet_push_shares = (maplist *)
1233                                 malloc(sizeof(maplist));
1234                         sc.ignet_push_shares->next = NULL;
1235                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1236                                 sc_node,
1237                                 sizeof sc.ignet_push_shares->remote_nodename);
1238                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1239                                 sc_room,
1240                                 sizeof sc.ignet_push_shares->remote_roomname);
1241                 }
1242         }
1243         fclose(fp);
1244         end_critical_section(S_NETCONFIGS);
1245
1246         if (!found_node) return(-1);
1247
1248         /* Send ALL messages */
1249         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1250                 network_spool_msg, &sc);
1251
1252         /* Concise cleanup because we know there's only one node in the sc */
1253         free(sc.ignet_push_shares);
1254
1255         CtdlLogPrintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1256                 num_spooled, target_node);
1257         return(num_spooled);
1258 }
1259
1260
1261 /*
1262  * Implements the NSYN command
1263  */
1264 void cmd_nsyn(char *argbuf) {
1265         int num_spooled;
1266         char target_node[256];
1267
1268         if (CtdlAccessCheck(ac_aide)) return;
1269
1270         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1271         num_spooled = network_sync_to(target_node);
1272         if (num_spooled >= 0) {
1273                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1274         }
1275         else {
1276                 cprintf("%d No such room/node share exists.\n",
1277                         ERROR + ROOM_NOT_FOUND);
1278         }
1279 }
1280
1281
1282
1283 /*
1284  * Batch up and send all outbound traffic from the current room
1285  */
1286 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1287         struct RoomProcList *ptr;
1288
1289         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1290         if (ptr == NULL) return;
1291
1292         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1293         begin_critical_section(S_RPLIST);
1294         ptr->next = rplist;
1295         rplist = ptr;
1296         end_critical_section(S_RPLIST);
1297 }
1298
1299 void destroy_network_queue_room(void)
1300 {
1301         struct RoomProcList *cur, *p;
1302         NetMap *nmcur, *nmp;
1303
1304         cur = rplist;
1305         begin_critical_section(S_RPLIST);
1306         while (cur != NULL)
1307         {
1308                 p = cur->next;
1309                 free (cur);
1310                 cur = p;
1311         }
1312         rplist = NULL;
1313         end_critical_section(S_RPLIST);
1314
1315         nmcur = the_netmap;
1316         while (nmcur != NULL)
1317         {
1318                 nmp = nmcur->next;
1319                 free (nmcur);
1320                 nmcur = nmp;
1321         }
1322         the_netmap = NULL;
1323         if (working_ignetcfg != NULL)
1324                 free (working_ignetcfg);
1325         working_ignetcfg = NULL;
1326 }
1327
1328
1329 /*
1330  * Learn topology from path fields
1331  */
1332 void network_learn_topology(char *node, char *path) {
1333         char nexthop[256];
1334         NetMap *nmptr;
1335
1336         strcpy(nexthop, "");
1337
1338         if (num_tokens(path, '!') < 3) return;
1339         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1340                 if (!strcasecmp(nmptr->nodename, node)) {
1341                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1342                         nmptr->lastcontact = time(NULL);
1343                         ++netmap_changed;
1344                         return;
1345                 }
1346         }
1347
1348         /* If we got here then it's not in the map, so add it. */
1349         nmptr = (NetMap *) malloc(sizeof (NetMap));
1350         strcpy(nmptr->nodename, node);
1351         nmptr->lastcontact = time(NULL);
1352         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1353         nmptr->next = the_netmap;
1354         the_netmap = nmptr;
1355         ++netmap_changed;
1356 }
1357
1358
1359
1360
1361 /*
1362  * Bounce a message back to the sender
1363  */
1364 void network_bounce(struct CtdlMessage *msg, char *reason) {
1365         char *oldpath = NULL;
1366         char buf[SIZ];
1367         char bouncesource[SIZ];
1368         char recipient[SIZ];
1369         struct recptypes *valid = NULL;
1370         char force_room[ROOMNAMELEN];
1371         static int serialnum = 0;
1372         size_t size;
1373
1374         CtdlLogPrintf(CTDL_DEBUG, "entering network_bounce()\n");
1375
1376         if (msg == NULL) return;
1377
1378         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1379
1380         /*
1381          * Give it a fresh message ID
1382          */
1383         if (msg->cm_fields['I'] != NULL) {
1384                 free(msg->cm_fields['I']);
1385         }
1386         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1387                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1388         msg->cm_fields['I'] = strdup(buf);
1389
1390         /*
1391          * FIXME ... right now we're just sending a bounce; we really want to
1392          * include the text of the bounced message.
1393          */
1394         if (msg->cm_fields['M'] != NULL) {
1395                 free(msg->cm_fields['M']);
1396         }
1397         msg->cm_fields['M'] = strdup(reason);
1398         msg->cm_format_type = 0;
1399
1400         /*
1401          * Turn the message around
1402          */
1403         if (msg->cm_fields['R'] == NULL) {
1404                 free(msg->cm_fields['R']);
1405         }
1406
1407         if (msg->cm_fields['D'] == NULL) {
1408                 free(msg->cm_fields['D']);
1409         }
1410
1411         snprintf(recipient, sizeof recipient, "%s@%s",
1412                 msg->cm_fields['A'], msg->cm_fields['N']);
1413
1414         if (msg->cm_fields['A'] == NULL) {
1415                 free(msg->cm_fields['A']);
1416         }
1417
1418         if (msg->cm_fields['N'] == NULL) {
1419                 free(msg->cm_fields['N']);
1420         }
1421
1422         if (msg->cm_fields['U'] == NULL) {
1423                 free(msg->cm_fields['U']);
1424         }
1425
1426         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1427         msg->cm_fields['N'] = strdup(config.c_nodename);
1428         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1429
1430         /* prepend our node to the path */
1431         if (msg->cm_fields['P'] != NULL) {
1432                 oldpath = msg->cm_fields['P'];
1433                 msg->cm_fields['P'] = NULL;
1434         }
1435         else {
1436                 oldpath = strdup("unknown_user");
1437         }
1438         size = strlen(oldpath) + SIZ;
1439         msg->cm_fields['P'] = malloc(size);
1440         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1441         free(oldpath);
1442
1443         /* Now submit the message */
1444         valid = validate_recipients(recipient, NULL, 0);
1445         if (valid != NULL) if (valid->num_error != 0) {
1446                 free_recipients(valid);
1447                 valid = NULL;
1448         }
1449         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1450                 strcpy(force_room, config.c_aideroom);
1451         }
1452         else {
1453                 strcpy(force_room, "");
1454         }
1455         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1456                 strcpy(force_room, config.c_aideroom);
1457         }
1458         CtdlSubmitMsg(msg, valid, force_room, 0);
1459
1460         /* Clean up */
1461         if (valid != NULL) free_recipients(valid);
1462         CtdlFreeMessage(msg);
1463         CtdlLogPrintf(CTDL_DEBUG, "leaving network_bounce()\n");
1464 }
1465
1466
1467
1468
1469 /*
1470  * Process a buffer containing a single message from a single file
1471  * from the inbound queue
1472  */
1473 void network_process_buffer(char *buffer, long size) {
1474         struct CtdlMessage *msg = NULL;
1475         long pos;
1476         int field;
1477         struct recptypes *recp = NULL;
1478         char target_room[ROOMNAMELEN];
1479         struct ser_ret sermsg;
1480         char *oldpath = NULL;
1481         char filename[PATH_MAX];
1482         FILE *fp;
1483         char nexthop[SIZ];
1484         unsigned char firstbyte;
1485         unsigned char lastbyte;
1486
1487         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
1488         firstbyte = buffer[0];
1489         lastbyte = buffer[size-1];
1490         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1491                 CtdlLogPrintf(CTDL_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
1492                         size, firstbyte, lastbyte);
1493                 return;
1494         }
1495
1496         /* Set default target room to trash */
1497         strcpy(target_room, TWITROOM);
1498
1499         /* Load the message into memory */
1500         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1501         memset(msg, 0, sizeof(struct CtdlMessage));
1502         msg->cm_magic = CTDLMESSAGE_MAGIC;
1503         msg->cm_anon_type = buffer[1];
1504         msg->cm_format_type = buffer[2];
1505
1506         for (pos = 3; pos < size; ++pos) {
1507                 field = buffer[pos];
1508                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1509                 pos = pos + strlen(&buffer[(int)pos]);
1510         }
1511
1512         /* Check for message routing */
1513         if (msg->cm_fields['D'] != NULL) {
1514                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1515
1516                         /* route the message */
1517                         strcpy(nexthop, "");
1518                         if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1519                                 /* prepend our node to the path */
1520                                 if (msg->cm_fields['P'] != NULL) {
1521                                         oldpath = msg->cm_fields['P'];
1522                                         msg->cm_fields['P'] = NULL;
1523                                 }
1524                                 else {
1525                                         oldpath = strdup("unknown_user");
1526                                 }
1527                                 size = strlen(oldpath) + SIZ;
1528                                 msg->cm_fields['P'] = malloc(size);
1529                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1530                                         config.c_nodename, oldpath);
1531                                 free(oldpath);
1532
1533                                 /* serialize the message */
1534                                 serialize_message(&sermsg, msg);
1535
1536                                 /* now send it */
1537                                 if (IsEmptyStr(nexthop)) {
1538                                         strcpy(nexthop, msg->cm_fields['D']);
1539                                 }
1540                                 snprintf(filename,
1541                                                  sizeof filename,
1542                                                  "%s/%s",
1543                                                  ctdl_netout_dir,
1544                                                  nexthop);
1545                                 CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
1546                                 fp = fopen(filename, "ab");
1547                                 if (fp != NULL) {
1548                                         fwrite(sermsg.ser,
1549                                                 sermsg.len, 1, fp);
1550                                         fclose(fp);
1551                                 }
1552                                 else {
1553                                         CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1554                                 }
1555                                 free(sermsg.ser);
1556                                 CtdlFreeMessage(msg);
1557                                 return;
1558                         }
1559
1560                         else {  /* invalid destination node name */
1561
1562                                 network_bounce(msg,
1563 "A message you sent could not be delivered due to an invalid destination node"
1564 " name.  Please check the address and try sending the message again.\n");
1565                                 msg = NULL;
1566                                 return;
1567
1568                         }
1569                 }
1570         }
1571
1572         /*
1573          * Check to see if we already have a copy of this message, and
1574          * abort its processing if so.  (We used to post a warning to Aide>
1575          * every time this happened, but the network is now so densely
1576          * connected that it's inevitable.)
1577          */
1578         if (network_usetable(msg) != 0) {
1579                 CtdlFreeMessage(msg);
1580                 return;
1581         }
1582
1583         /* Learn network topology from the path */
1584         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1585                 network_learn_topology(msg->cm_fields['N'],
1586                                         msg->cm_fields['P']);
1587         }
1588
1589         /* Is the sending node giving us a very persuasive suggestion about
1590          * which room this message should be saved in?  If so, go with that.
1591          */
1592         if (msg->cm_fields['C'] != NULL) {
1593                 safestrncpy(target_room,
1594                         msg->cm_fields['C'],
1595                         sizeof target_room);
1596         }
1597
1598         /* Otherwise, does it have a recipient?  If so, validate it... */
1599         else if (msg->cm_fields['R'] != NULL) {
1600                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1601                 if (recp != NULL) if (recp->num_error != 0) {
1602                         network_bounce(msg,
1603                                 "A message you sent could not be delivered due to an invalid address.\n"
1604                                 "Please check the address and try sending the message again.\n");
1605                         msg = NULL;
1606                         free_recipients(recp);
1607                         return;
1608                 }
1609                 strcpy(target_room, "");        /* no target room if mail */
1610         }
1611
1612         /* Our last shot at finding a home for this message is to see if
1613          * it has the O field (Originating room) set.
1614          */
1615         else if (msg->cm_fields['O'] != NULL) {
1616                 safestrncpy(target_room,
1617                         msg->cm_fields['O'],
1618                         sizeof target_room);
1619         }
1620
1621         /* Strip out fields that are only relevant during transit */
1622         if (msg->cm_fields['D'] != NULL) {
1623                 free(msg->cm_fields['D']);
1624                 msg->cm_fields['D'] = NULL;
1625         }
1626         if (msg->cm_fields['C'] != NULL) {
1627                 free(msg->cm_fields['C']);
1628                 msg->cm_fields['C'] = NULL;
1629         }
1630
1631         /* save the message into a room */
1632         if (PerformNetprocHooks(msg, target_room) == 0) {
1633                 msg->cm_flags = CM_SKIP_HOOKS;
1634                 CtdlSubmitMsg(msg, recp, target_room, 0);
1635         }
1636         CtdlFreeMessage(msg);
1637         free_recipients(recp);
1638 }
1639
1640
1641 /*
1642  * Process a single message from a single file from the inbound queue
1643  */
1644 void network_process_message(FILE *fp, long msgstart, long msgend) {
1645         long hold_pos;
1646         long size;
1647         char *buffer;
1648
1649         hold_pos = ftell(fp);
1650         size = msgend - msgstart + 1;
1651         buffer = malloc(size);
1652         if (buffer != NULL) {
1653                 fseek(fp, msgstart, SEEK_SET);
1654                 fread(buffer, size, 1, fp);
1655                 network_process_buffer(buffer, size);
1656                 free(buffer);
1657         }
1658
1659         fseek(fp, hold_pos, SEEK_SET);
1660 }
1661
1662
1663 /*
1664  * Process a single file from the inbound queue
1665  */
1666 void network_process_file(char *filename) {
1667         FILE *fp;
1668         long msgstart = (-1L);
1669         long msgend = (-1L);
1670         long msgcur = 0L;
1671         int ch;
1672
1673
1674         fp = fopen(filename, "rb");
1675         if (fp == NULL) {
1676                 CtdlLogPrintf(CTDL_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1677                 return;
1678         }
1679
1680         fseek(fp, 0L, SEEK_END);
1681         CtdlLogPrintf(CTDL_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1682         rewind(fp);
1683
1684         /* Look for messages in the data stream and break them out */
1685         while (ch = getc(fp), ch >= 0) {
1686
1687                 if (ch == 255) {
1688                         if (msgstart >= 0L) {
1689                                 msgend = msgcur - 1;
1690                                 network_process_message(fp, msgstart, msgend);
1691                         }
1692                         msgstart = msgcur;
1693                 }
1694
1695                 ++msgcur;
1696         }
1697
1698         msgend = msgcur - 1;
1699         if (msgstart >= 0L) {
1700                 network_process_message(fp, msgstart, msgend);
1701         }
1702
1703         fclose(fp);
1704         unlink(filename);
1705 }
1706
1707
1708 /*
1709  * Process anything in the inbound queue
1710  */
1711 void network_do_spoolin(void) {
1712         DIR *dp;
1713         struct dirent *d;
1714         struct stat statbuf;
1715         char filename[PATH_MAX];
1716         static time_t last_spoolin_mtime = 0L;
1717
1718         /*
1719          * Check the spoolin directory's modification time.  If it hasn't
1720          * been touched, we don't need to scan it.
1721          */
1722         if (stat(ctdl_netin_dir, &statbuf)) return;
1723         if (statbuf.st_mtime == last_spoolin_mtime) {
1724                 CtdlLogPrintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1725                 return;
1726         }
1727         last_spoolin_mtime = statbuf.st_mtime;
1728         CtdlLogPrintf(CTDL_DEBUG, "network: processing inbound queue\n");
1729
1730         /*
1731          * Ok, there's something interesting in there, so scan it.
1732          */
1733         dp = opendir(ctdl_netin_dir);
1734         if (dp == NULL) return;
1735
1736         while (d = readdir(dp), d != NULL) {
1737                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1738                         snprintf(filename,
1739                                          sizeof filename,
1740                                          "%s/%s",
1741                                          ctdl_netin_dir,
1742                                          d->d_name);
1743                         network_process_file(filename);
1744                 }
1745         }
1746
1747         closedir(dp);
1748 }
1749
1750 /*
1751  * Delete any files in the outbound queue that were intended
1752  * to be sent to nodes which no longer exist.
1753  */
1754 void network_purge_spoolout(void) {
1755         DIR *dp;
1756         struct dirent *d;
1757         char filename[PATH_MAX];
1758         char nexthop[256];
1759         int i;
1760
1761         dp = opendir(ctdl_netout_dir);
1762         if (dp == NULL) return;
1763
1764         while (d = readdir(dp), d != NULL) {
1765                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1766                         continue;
1767                 snprintf(filename,
1768                                  sizeof filename,
1769                                  "%s/%s",
1770                                  ctdl_netout_dir,
1771                                  d->d_name);
1772
1773                 strcpy(nexthop, "");
1774                 i = is_valid_node(nexthop, NULL, d->d_name);
1775
1776                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1777                         unlink(filename);
1778                 }
1779         }
1780
1781
1782         closedir(dp);
1783 }
1784
1785
1786 /*
1787  * receive network spool from the remote system
1788  */
1789 void receive_spool(int sock, char *remote_nodename) {
1790         long download_len = 0L;
1791         long bytes_received = 0L;
1792         long bytes_copied = 0L;
1793         char buf[SIZ];
1794         static char pbuf[IGNET_PACKET_SIZE];
1795         char tempfilename[PATH_MAX];
1796         char filename[PATH_MAX];
1797         long plen;
1798         FILE *fp, *newfp;
1799
1800         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
1801         if (sock_puts(sock, "NDOP") < 0) return;
1802         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1803         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1804         if (buf[0] != '2') {
1805                 return;
1806         }
1807         download_len = extract_long(&buf[4], 0);
1808
1809         bytes_received = 0L;
1810         fp = fopen(tempfilename, "w");
1811         if (fp == NULL) {
1812                 CtdlLogPrintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1813                         strerror(errno));
1814                 return;
1815         }
1816
1817         while (bytes_received < download_len) {
1818                 /**
1819                  * If shutting down we can exit here and unlink the temp file.
1820                  * this shouldn't loose us any messages.
1821                  */
1822                 if (CtdlThreadCheckStop())
1823                 {
1824                         fclose(fp);
1825                         unlink(tempfilename);
1826                         return;
1827                 }
1828                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1829                         bytes_received,
1830                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1831                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1832                 if (sock_puts(sock, buf) < 0) {
1833                         fclose(fp);
1834                         unlink(tempfilename);
1835                         return;
1836                 }
1837                 if (sock_getln(sock, buf, sizeof buf) < 0) {
1838                         fclose(fp);
1839                         unlink(tempfilename);
1840                         return;
1841                 }
1842                 if (buf[0] == '6') {
1843                         plen = extract_long(&buf[4], 0);
1844                         if (sock_read(sock, pbuf, plen, 1) < 0) {
1845                                 fclose(fp);
1846                                 unlink(tempfilename);
1847                                 return;
1848                         }
1849                         fwrite((char *) pbuf, plen, 1, fp);
1850                         bytes_received = bytes_received + plen;
1851                 }
1852         }
1853
1854         fclose(fp);
1855         /** Last chance for shutdown exit */
1856         if (CtdlThreadCheckStop())
1857         {
1858                 unlink(tempfilename);
1859                 return;
1860         }
1861         if (sock_puts(sock, "CLOS") < 0) {
1862                 unlink(tempfilename);
1863                 return;
1864         }
1865         /**
1866          * From here on we must complete or messages will get lost
1867          */
1868         if (sock_getln(sock, buf, sizeof buf) < 0) {
1869                 unlink(tempfilename);
1870                 return;
1871         }
1872         if (download_len > 0) {
1873                 CtdlLogPrintf(CTDL_NOTICE, "Received %ld octets from <%s>\n", download_len, remote_nodename);
1874         }
1875         CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
1876
1877         /* Now copy the temp file to its permanent location.
1878          * (We copy instead of link because they may be on different filesystems)
1879          */
1880         begin_critical_section(S_NETSPOOL);
1881         snprintf(filename,
1882                          sizeof filename,
1883                          "%s/%s.%ld",
1884                          ctdl_netin_dir,
1885                          remote_nodename,
1886                          (long) getpid()
1887         );
1888         fp = fopen(tempfilename, "r");
1889         if (fp != NULL) {
1890                 newfp = fopen(filename, "w");
1891                 if (newfp != NULL) {
1892                         bytes_copied = 0L;
1893                         while (bytes_copied < download_len) {
1894                                 plen = download_len - bytes_copied;
1895                                 if (plen > sizeof buf) {
1896                                         plen = sizeof buf;
1897                                 }
1898                                 fread(buf, plen, 1, fp);
1899                                 fwrite(buf, plen, 1, newfp);
1900                                 bytes_copied += plen;
1901                         }
1902                         fclose(newfp);
1903                 }
1904                 fclose(fp);
1905         }
1906         end_critical_section(S_NETSPOOL);
1907         unlink(tempfilename);
1908 }
1909
1910
1911
1912 /*
1913  * transmit network spool to the remote system
1914  */
1915 void transmit_spool(int sock, char *remote_nodename)
1916 {
1917         char buf[SIZ];
1918         char pbuf[4096];
1919         long plen;
1920         long bytes_to_write, thisblock, bytes_written;
1921         int fd;
1922         char sfname[128];
1923
1924         if (sock_puts(sock, "NUOP") < 0) return;
1925         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1926         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1927         if (buf[0] != '2') {
1928                 return;
1929         }
1930
1931         snprintf(sfname, sizeof sfname,
1932                          "%s/%s",
1933                          ctdl_netout_dir,
1934                          remote_nodename);
1935         fd = open(sfname, O_RDONLY);
1936         if (fd < 0) {
1937                 if (errno != ENOENT) {
1938                         CtdlLogPrintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1939                                 strerror(errno));
1940                 }
1941                 return;
1942         }
1943         bytes_written = 0;
1944         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1945                 bytes_to_write = plen;
1946                 while (bytes_to_write > 0L) {
1947                         /** Exit if shutting down */
1948                         if (CtdlThreadCheckStop())
1949                         {
1950                                 close(fd);
1951                                 return;
1952                         }
1953
1954                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1955                         if (sock_puts(sock, buf) < 0) {
1956                                 close(fd);
1957                                 return;
1958                         }
1959                         if (sock_getln(sock, buf, sizeof buf) < 0) {
1960                                 close(fd);
1961                                 return;
1962                         }
1963                         thisblock = atol(&buf[4]);
1964                         if (buf[0] == '7') {
1965                                 if (sock_write(sock, pbuf,
1966                                    (int) thisblock) < 0) {
1967                                         close(fd);
1968                                         return;
1969                                 }
1970                                 bytes_to_write -= thisblock;
1971                                 bytes_written += thisblock;
1972                         } else {
1973                                 goto ABORTUPL;
1974                         }
1975                 }
1976         }
1977
1978 ABORTUPL:
1979         close(fd);
1980         /** Last chance for shutdown exit */
1981         if(CtdlThreadCheckStop())
1982                 return;
1983
1984         if (sock_puts(sock, "UCLS 1") < 0) return;
1985         /**
1986          * From here on we must complete or messages will get lost
1987          */
1988         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1989         CtdlLogPrintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n",
1990                         bytes_written, remote_nodename);
1991         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1992         if (buf[0] == '2') {
1993                 CtdlLogPrintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
1994                 unlink(sfname);
1995         }
1996 }
1997
1998
1999
2000 /*
2001  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
2002  */
2003 void network_poll_node(char *node, char *secret, char *host, char *port) {
2004         int sock;
2005         char buf[SIZ];
2006         char err_buf[SIZ];
2007         char connected_to[SIZ];
2008
2009         if (network_talking_to(node, NTT_CHECK)) return;
2010         network_talking_to(node, NTT_ADD);
2011         CtdlLogPrintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
2012
2013         sock = sock_connect(host, port, "tcp");
2014         if (sock < 0) {
2015                 CtdlLogPrintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
2016                 network_talking_to(node, NTT_REMOVE);
2017                 return;
2018         }
2019
2020         CtdlLogPrintf(CTDL_DEBUG, "Connected!\n");
2021
2022         /* Read the server greeting */
2023         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
2024         CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
2025
2026         /* Check that the remote is who we think it is and warn the Aide if not */
2027         extract_token (connected_to, buf, 1, ' ', sizeof connected_to);
2028         if (strcmp(connected_to, node))
2029         {
2030                 snprintf (err_buf, sizeof(err_buf), "Connected to node \"%s\" but I was expecting to connect to node \"%s\".", connected_to, node);
2031                 aide_message(err_buf, "IGNet Networking error.");
2032         }
2033
2034         /* Identify ourselves */
2035         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
2036         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2037         if (sock_puts(sock, buf) <0) goto bail;
2038         if (sock_getln(sock, buf, sizeof buf) < 0) goto bail;
2039         CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
2040         if (buf[0] != '2') goto bail;
2041
2042         /* At this point we are authenticated. */
2043         if (!CtdlThreadCheckStop())
2044                 receive_spool(sock, node);
2045         if (!CtdlThreadCheckStop())
2046                 transmit_spool(sock, node);
2047
2048         sock_puts(sock, "QUIT");
2049 bail:   sock_close(sock);
2050         network_talking_to(node, NTT_REMOVE);
2051 }
2052
2053
2054
2055 /*
2056  * Poll other Citadel nodes and transfer inbound/outbound network data.
2057  * Set "full" to nonzero to force a poll of every node, or to zero to poll
2058  * only nodes to which we have data to send.
2059  */
2060 void network_poll_other_citadel_nodes(int full_poll) {
2061         int i;
2062         char linebuf[256];
2063         char node[SIZ];
2064         char host[256];
2065         char port[256];
2066         char secret[256];
2067         int poll = 0;
2068         char spoolfile[256];
2069
2070         if (working_ignetcfg == NULL) {
2071                 CtdlLogPrintf(CTDL_DEBUG, "No nodes defined - not polling\n");
2072                 return;
2073         }
2074
2075         /* Use the string tokenizer to grab one line at a time */
2076         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2077                 if(CtdlThreadCheckStop())
2078                         return;
2079                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2080                 extract_token(node, linebuf, 0, '|', sizeof node);
2081                 extract_token(secret, linebuf, 1, '|', sizeof secret);
2082                 extract_token(host, linebuf, 2, '|', sizeof host);
2083                 extract_token(port, linebuf, 3, '|', sizeof port);
2084                 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2085                    && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2086                         poll = full_poll;
2087                         if (poll == 0) {
2088                                 snprintf(spoolfile,
2089                                                  sizeof spoolfile,
2090                                                  "%s/%s",
2091                                                  ctdl_netout_dir,
2092                                                  node);
2093                                 if (access(spoolfile, R_OK) == 0) {
2094                                         poll = 1;
2095                                 }
2096                         }
2097                         if (poll) {
2098                                 network_poll_node(node, secret, host, port);
2099                         }
2100                 }
2101         }
2102
2103 }
2104
2105
2106
2107
2108 /*
2109  * It's ok if these directories already exist.  Just fail silently.
2110  */
2111 void create_spool_dirs(void) {
2112         mkdir(ctdl_spool_dir, 0700);
2113         chown(ctdl_spool_dir, CTDLUID, (-1));
2114         mkdir(ctdl_netin_dir, 0700);
2115         chown(ctdl_netin_dir, CTDLUID, (-1));
2116         mkdir(ctdl_netout_dir, 0700);
2117         chown(ctdl_netout_dir, CTDLUID, (-1));
2118 }
2119
2120
2121
2122
2123
2124 /*
2125  * network_do_queue()
2126  *
2127  * Run through the rooms doing various types of network stuff.
2128  */
2129 void *network_do_queue(void *args) {
2130         static time_t last_run = 0L;
2131         struct RoomProcList *ptr;
2132         int full_processing = 1;
2133         struct CitContext networkerCC;
2134
2135         /* Give the networker its own private CitContext */
2136         CtdlFillSystemContext(&networkerCC, "network");
2137         citthread_setspecific(MyConKey, (void *)&networkerCC );
2138
2139         /*
2140          * Run the full set of processing tasks no more frequently
2141          * than once every n seconds
2142          */
2143         if ( (time(NULL) - last_run) < config.c_net_freq ) {
2144                 full_processing = 0;
2145                 CtdlLogPrintf(CTDL_DEBUG, "Network full processing in %ld seconds.\n", config.c_net_freq - (time(NULL)- last_run));
2146         }
2147
2148         /*
2149          * This is a simple concurrency check to make sure only one queue run
2150          * is done at a time.  We could do this with a mutex, but since we
2151          * don't really require extremely fine granularity here, we'll do it
2152          * with a static variable instead.
2153          */
2154         if (doing_queue) return NULL;
2155         doing_queue = 1;
2156
2157         /* Load the IGnet Configuration into memory */
2158         load_working_ignetcfg();
2159
2160         /*
2161          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
2162          * then we poll everyone.  Otherwise we only poll nodes we have stuff
2163          * to send to.
2164          */
2165         network_poll_other_citadel_nodes(full_processing);
2166
2167         /*
2168          * Load the network map and filter list into memory.
2169          */
2170         read_network_map();
2171         filterlist = load_filter_list();
2172
2173         /*
2174          * Go ahead and run the queue
2175          */
2176         if (full_processing && !CtdlThreadCheckStop()) {
2177                 CtdlLogPrintf(CTDL_DEBUG, "network: loading outbound queue\n");
2178                 ForEachRoom(network_queue_room, NULL);
2179         }
2180
2181         if (rplist != NULL) {
2182                 CtdlLogPrintf(CTDL_DEBUG, "network: running outbound queue\n");
2183                 while (rplist != NULL && !CtdlThreadCheckStop()) {
2184                         char spoolroomname[ROOMNAMELEN];
2185                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2186                         begin_critical_section(S_RPLIST);
2187
2188                         /* pop this record off the list */
2189                         ptr = rplist;
2190                         rplist = rplist->next;
2191                         free(ptr);
2192
2193                         /* invalidate any duplicate entries to prevent double processing */
2194                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2195                                 if (!strcasecmp(ptr->name, spoolroomname)) {
2196                                         ptr->name[0] = 0;
2197                                 }
2198                         }
2199
2200                         end_critical_section(S_RPLIST);
2201                         if (spoolroomname[0] != 0) {
2202                                 network_spoolout_room(spoolroomname);
2203                         }
2204                 }
2205         }
2206
2207         /* If there is anything in the inbound queue, process it */
2208         if (!CtdlThreadCheckStop())
2209                 network_do_spoolin();
2210
2211         /* Save the network map back to disk */
2212         write_network_map();
2213
2214         /* Free the filter list in memory */
2215         free_filter_list(filterlist);
2216         filterlist = NULL;
2217
2218         network_purge_spoolout();
2219
2220         CtdlLogPrintf(CTDL_DEBUG, "network: queue run completed\n");
2221
2222         if (full_processing) {
2223                 last_run = time(NULL);
2224         }
2225
2226         doing_queue = 0;
2227         if (!CtdlThreadCheckStop()) // Only reschedule if system is not stopping
2228                 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, time(NULL) + 60);
2229         else
2230                 CtdlLogPrintf(CTDL_DEBUG, "network: Task STOPPED.\n");
2231         return NULL;
2232 }
2233
2234
2235 /*
2236  * cmd_netp() - authenticate to the server as another Citadel node polling
2237  *            for network traffic
2238  */
2239 void cmd_netp(char *cmdbuf)
2240 {
2241         char node[256];
2242         char pass[256];
2243         int v;
2244
2245         char secret[256];
2246         char nexthop[256];
2247         char err_buf[SIZ];
2248
2249         /* Authenticate */
2250         extract_token(node, cmdbuf, 0, '|', sizeof node);
2251         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2252
2253         if (doing_queue) {
2254                 CtdlLogPrintf(CTDL_WARNING, "Network node <%s> refused - spooling\n", node);
2255                 cprintf("%d spooling - try again in a few minutes\n", ERROR + RESOURCE_BUSY);
2256                 return;
2257         }
2258
2259         /* load the IGnet Configuration to check node validity */
2260         load_working_ignetcfg();
2261         v = is_valid_node(nexthop, secret, node);
2262
2263         if (v != 0) {
2264                 snprintf(err_buf, sizeof err_buf,
2265                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
2266                         node, CC->cs_host, CC->cs_addr
2267                 );
2268                 CtdlLogPrintf(CTDL_WARNING, err_buf);
2269                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2270                 aide_message(err_buf, "IGNet Networking.");
2271                 return;
2272         }
2273
2274         if (strcasecmp(pass, secret)) {
2275                 snprintf(err_buf, sizeof err_buf,
2276                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
2277                         CC->cs_host, CC->cs_addr, node
2278                 );
2279                 CtdlLogPrintf(CTDL_WARNING, err_buf);
2280                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2281                 aide_message(err_buf, "IGNet Networking.");
2282                 return;
2283         }
2284
2285         if (network_talking_to(node, NTT_CHECK)) {
2286                 CtdlLogPrintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2287                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2288                 return;
2289         }
2290
2291         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2292         network_talking_to(node, NTT_ADD);
2293         CtdlLogPrintf(CTDL_NOTICE, "Network node <%s> logged in from %s [%s]\n",
2294                 CC->net_node, CC->cs_host, CC->cs_addr
2295         );
2296         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
2297 }
2298
2299
2300 int network_room_handler (struct ctdlroom *room)
2301 {
2302         network_queue_room(room, NULL);
2303         return 0;
2304 }
2305
2306
2307 /*
2308  * Module entry point
2309  */
2310 CTDL_MODULE_INIT(network)
2311 {
2312         if (!threading)
2313         {
2314                 create_spool_dirs();
2315                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2316                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2317                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2318                 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2319                 CtdlRegisterRoomHook(network_room_handler);
2320                 CtdlRegisterCleanupHook(destroy_network_queue_room);
2321         }
2322         else
2323                 CtdlThreadSchedule("IGnet Network", CTDLTHREAD_BIGSTACK, network_do_queue, NULL, 0);
2324         /* return our Subversion id for the Log */
2325         return "$Id$";
2326 }