citadel/modules/network/serv_network.c

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