citadel/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) 2000-2002 by Art Cancro and others.
   8  * This code is released under the terms of the GNU General Public License.
   9  *
  10  */
  11
  12 /*
  13  * FIXME
  14  * Don't allow polls during network processing
  15  */
  16
  17 #include "sysdep.h"
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <stdio.h>
  21 #include <fcntl.h>
  22 #include <ctype.h>
  23 #include <signal.h>
  24 #include <pwd.h>
  25 #include <errno.h>
  26 #include <sys/types.h>
  27 #include <dirent.h>
  28 #if TIME_WITH_SYS_TIME
  29 # include <sys/time.h>
  30 # include <time.h>
  31 #else
  32 # if HAVE_SYS_TIME_H
  33 #  include <sys/time.h>
  34 # else
  35 #  include <time.h>
  36 # endif
  37 #endif
  38
  39 #include <sys/wait.h>
  40 #include <string.h>
  41 #include <limits.h>
  42 #include "citadel.h"
  43 #include "server.h"
  44 #include "sysdep_decls.h"
  45 #include "citserver.h"
  46 #include "support.h"
  47 #include "config.h"
  48 #include "dynloader.h"
  49 #include "room_ops.h"
  50 #include "user_ops.h"
  51 #include "policy.h"
  52 #include "database.h"
  53 #include "msgbase.h"
  54 #include "tools.h"
  55 #include "internet_addressing.h"
  56 #include "serv_network.h"
  57 #include "clientsocket.h"
  58 #include "file_ops.h"
  59
  60 #ifndef HAVE_SNPRINTF
  61 #include "snprintf.h"
  62 #endif
  63
  64
  65 /*
  66  * When we do network processing, it's accomplished in two passes; one to
  67  * gather a list of rooms and one to actually do them.  It's ok that rplist
  68  * is global; this process *only* runs as part of the housekeeping loop and
  69  * therefore only one will run at a time.
  70  */
  71 struct RoomProcList *rplist = NULL;
  72
  73 /*
  74  * We build a map of network nodes during processing.
  75  */
  76 struct NetMap *the_netmap = NULL;
  77
  78 /*
  79  * Keep track of what messages to reject
  80  */
  81 struct FilterList *load_filter_list(void) {
  82         char *serialized_list = NULL;
  83         int i;
  84         char buf[SIZ];
  85         struct FilterList *newlist = NULL;
  86         struct FilterList *nptr;
  87
  88         serialized_list = CtdlGetSysConfig(FILTERLIST);
  89         if (serialized_list == NULL) return(NULL); /* if null, no entries */
  90
  91         /* Use the string tokenizer to grab one line at a time */
  92         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
  93                 extract_token(buf, serialized_list, i, '\n');
  94                 nptr = (struct FilterList *) mallok(sizeof(struct FilterList));
  95                 extract(nptr->fl_user, buf, 0);
  96                 striplt(nptr->fl_user);
  97                 extract(nptr->fl_room, buf, 1);
  98                 striplt(nptr->fl_room);
  99                 extract(nptr->fl_node, buf, 2);
 100                 striplt(nptr->fl_node);
 101
 102                 /* Cowardly refuse to add an any/any/any entry that would
 103                  * end up filtering every single message.
 104                  */
 105                 if (strlen(nptr->fl_user) + strlen(nptr->fl_room)
 106                    + strlen(nptr->fl_node) == 0) {
 107                         phree(nptr);
 108                 }
 109                 else {
 110                         nptr->next = newlist;
 111                         newlist = nptr;
 112                 }
 113         }
 114
 115         phree(serialized_list);
 116         return newlist;
 117 }
 118
 119
 120 void free_filter_list(struct FilterList *fl) {
 121         if (fl == NULL) return;
 122         free_filter_list(fl->next);
 123         phree(fl);
 124 }
 125
 126
 127
 128 /*
 129  * Check the use table.  This is a list of messages which have recently
 130  * arrived on the system.  It is maintained and queried to prevent the same
 131  * message from being entered into the database multiple times if it happens
 132  * to arrive multiple times by accident.
 133  */
 134 int network_usetable(struct CtdlMessage *msg) {
 135
 136         char msgid[SIZ];
 137         struct cdbdata *cdbut;
 138         struct UseTable ut;
 139
 140         /* Bail out if we can't generate a message ID */
 141         if (msg == NULL) {
 142                 return(0);
 143         }
 144         if (msg->cm_fields['I'] == NULL) {
 145                 return(0);
 146         }
 147         if (strlen(msg->cm_fields['I']) == 0) {
 148                 return(0);
 149         }
 150
 151         /* Generate the message ID */
 152         strcpy(msgid, msg->cm_fields['I']);
 153         if (haschar(msgid, '@') == 0) {
 154                 strcat(msgid, "@");
 155                 if (msg->cm_fields['N'] != NULL) {
 156                         strcat(msgid, msg->cm_fields['N']);
 157                 }
 158                 else {
 159                         return(0);
 160                 }
 161         }
 162
 163         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 164         if (cdbut != NULL) {
 165                 cdb_free(cdbut);
 166                 return(1);
 167         }
 168
 169         /* If we got to this point, it's unique: add it. */
 170         strcpy(ut.ut_msgid, msgid);
 171         ut.ut_timestamp = time(NULL);
 172         cdb_store(CDB_USETABLE, msgid, strlen(msgid),
 173                 &ut, sizeof(struct UseTable) );
 174         return(0);
 175 }
 176
 177
 178 /*
 179  * Read the network map from its configuration file into memory.
 180  */
 181 void read_network_map(void) {
 182         char *serialized_map = NULL;
 183         int i;
 184         char buf[SIZ];
 185         struct NetMap *nmptr;
 186
 187         serialized_map = CtdlGetSysConfig(IGNETMAP);
 188         if (serialized_map == NULL) return;     /* if null, no entries */
 189
 190         /* Use the string tokenizer to grab one line at a time */
 191         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 192                 extract_token(buf, serialized_map, i, '\n');
 193                 nmptr = (struct NetMap *) mallok(sizeof(struct NetMap));
 194                 extract(nmptr->nodename, buf, 0);
 195                 nmptr->lastcontact = extract_long(buf, 1);
 196                 extract(nmptr->nexthop, buf, 2);
 197                 nmptr->next = the_netmap;
 198                 the_netmap = nmptr;
 199         }
 200
 201         phree(serialized_map);
 202 }
 203
 204
 205 /*
 206  * Write the network map from memory back to the configuration file.
 207  */
 208 void write_network_map(void) {
 209         char *serialized_map = NULL;
 210         struct NetMap *nmptr;
 211
 212         serialized_map = strdoop("");
 213
 214         if (the_netmap != NULL) {
 215                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 216                         serialized_map = reallok(serialized_map,
 217                                                 (strlen(serialized_map)+SIZ) );
 218                         if (strlen(nmptr->nodename) > 0) {
 219                                 snprintf(&serialized_map[strlen(serialized_map)],
 220                                         SIZ,
 221                                         "%s|%ld|%s\n",
 222                                         nmptr->nodename,
 223                                         (long)nmptr->lastcontact,
 224                                         nmptr->nexthop);
 225                         }
 226                 }
 227         }
 228
 229         CtdlPutSysConfig(IGNETMAP, serialized_map);
 230         phree(serialized_map);
 231
 232         /* Now free the list */
 233         while (the_netmap != NULL) {
 234                 nmptr = the_netmap->next;
 235                 phree(the_netmap);
 236                 the_netmap = nmptr;
 237         }
 238 }
 239
 240
 241
 242 /*
 243  * Check the network map and determine whether the supplied node name is
 244  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 245  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 246  * shared secret.
 247  */
 248 int is_valid_node(char *nexthop, char *secret, char *node) {
 249         char *ignetcfg = NULL;
 250         int i;
 251         char linebuf[SIZ];
 252         char buf[SIZ];
 253         int retval;
 254         struct NetMap *nmptr;
 255
 256         if (node == NULL) {
 257                 return(-1);
 258         }
 259
 260         /*
 261          * First try the neighbor nodes
 262          */
 263         ignetcfg = CtdlGetSysConfig(IGNETCFG);
 264         if (ignetcfg == NULL) {
 265                 if (nexthop != NULL) {
 266                         strcpy(nexthop, "");
 267                 }
 268                 return(-1);
 269         }
 270
 271         retval = (-1);
 272         if (nexthop != NULL) {
 273                 strcpy(nexthop, "");
 274         }
 275
 276         /* Use the string tokenizer to grab one line at a time */
 277         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
 278                 extract_token(linebuf, ignetcfg, i, '\n');
 279                 extract(buf, linebuf, 0);
 280                 if (!strcasecmp(buf, node)) {
 281                         if (nexthop != NULL) {
 282                                 strcpy(nexthop, "");
 283                         }
 284                         if (secret != NULL) {
 285                                 extract(secret, linebuf, 1);
 286                         }
 287                         retval = 0;
 288                 }
 289         }
 290
 291         phree(ignetcfg);
 292         if (retval == 0) {
 293                 return(retval);         /* yup, it's a direct neighbor */
 294         }
 295
 296         /*
 297          * If we get to this point we have to see if we know the next hop
 298          */
 299         if (the_netmap != NULL) {
 300                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 301                         if (!strcasecmp(nmptr->nodename, node)) {
 302                                 if (nexthop != NULL) {
 303                                         strcpy(nexthop, nmptr->nexthop);
 304                                 }
 305                                 return(0);
 306                         }
 307                 }
 308         }
 309
 310         /*
 311          * If we get to this point, the supplied node name is bogus.
 312          */
 313         lprintf(5, "Invalid node name <%s>\n", node);
 314         return(-1);
 315 }
 316
 317
 318
 319
 320
 321 void cmd_gnet(char *argbuf) {
 322         char filename[SIZ];
 323         char buf[SIZ];
 324         FILE *fp;
 325
 326         if (CtdlAccessCheck(ac_room_aide)) return;
 327         assoc_file_name(filename, sizeof filename, &CC->quickroom, "netconfigs");
 328         cprintf("%d Network settings for room #%ld <%s>\n",
 329                 LISTING_FOLLOWS,
 330                 CC->quickroom.QRnumber, CC->quickroom.QRname);
 331
 332         fp = fopen(filename, "r");
 333         if (fp != NULL) {
 334                 while (fgets(buf, sizeof buf, fp) != NULL) {
 335                         buf[strlen(buf)-1] = 0;
 336                         cprintf("%s\n", buf);
 337                 }
 338                 fclose(fp);
 339         }
 340
 341         cprintf("000\n");
 342 }
 343
 344
 345 void cmd_snet(char *argbuf) {
 346         char tempfilename[SIZ];
 347         char filename[SIZ];
 348         char buf[SIZ];
 349         FILE *fp;
 350
 351         if (CtdlAccessCheck(ac_room_aide)) return;
 352         safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
 353         assoc_file_name(filename, sizeof filename, &CC->quickroom, "netconfigs");
 354
 355         fp = fopen(tempfilename, "w");
 356         if (fp == NULL) {
 357                 cprintf("%d Cannot open %s: %s\n",
 358                         ERROR+INTERNAL_ERROR,
 359                         tempfilename,
 360                         strerror(errno));
 361         }
 362
 363         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 364         while (client_gets(buf), strcmp(buf, "000")) {
 365                 fprintf(fp, "%s\n", buf);
 366         }
 367         fclose(fp);
 368
 369         /* Now copy the temp file to its permanent location
 370          * (We use /bin/mv instead of link() because they may be on
 371          * different filesystems)
 372          */
 373         unlink(filename);
 374         snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
 375         system(buf);
 376 }
 377
 378
 379 /*
 380  * Spools out one message from the list.
 381  */
 382 void network_spool_msg(long msgnum, void *userdata) {
 383         struct SpoolControl *sc;
 384         int err;
 385         int i;
 386         char *newpath = NULL;
 387         char *instr = NULL;
 388         size_t instr_len = SIZ;
 389         struct CtdlMessage *msg = NULL;
 390         struct CtdlMessage *imsg;
 391         struct namelist *nptr;
 392         struct ser_ret sermsg;
 393         FILE *fp;
 394         char filename[SIZ];
 395         char buf[SIZ];
 396         int bang = 0;
 397         int send = 1;
 398         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 399
 400         sc = (struct SpoolControl *)userdata;
 401
 402         /*
 403          * Process mailing list recipients
 404          */
 405         if (sc->listrecps != NULL) {
 406
 407                 /* First, copy it to the spoolout room */
 408                 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
 409                 if (err != 0) return;
 410
 411                 /*
 412                  * Figure out how big a buffer we need to allocate
 413                  */
 414                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 415                         instr_len = instr_len + strlen(nptr->name);
 416                 }
 417
 418                 /*
 419                  * allocate...
 420                  */
 421                 lprintf(9, "Generating delivery instructions\n");
 422                 instr = mallok(instr_len);
 423                 if (instr == NULL) {
 424                         lprintf(1, "Cannot allocate %ld bytes for instr...\n",
 425                                 (long)instr_len);
 426                         abort();
 427                 }
 428                 snprintf(instr, instr_len,
 429                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 430                         "bounceto|postmaster@%s\n" ,
 431                         SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
 432
 433                 /* Generate delivery instructions for each recipient */
 434                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 435                         size_t tmp = strlen(instr);
 436                         snprintf(&instr[tmp], instr_len - tmp,
 437                                  "remote|%s|0||\n", nptr->name);
 438                 }
 439
 440                 /*
 441                  * Generate a message from the instructions
 442                  */
 443                 imsg = mallok(sizeof(struct CtdlMessage));
 444                 memset(imsg, 0, sizeof(struct CtdlMessage));
 445                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
 446                 imsg->cm_anon_type = MES_NORMAL;
 447                 imsg->cm_format_type = FMT_RFC822;
 448                 imsg->cm_fields['A'] = strdoop("Citadel");
 449                 imsg->cm_fields['M'] = instr;
 450
 451                 /* Save delivery instructions in spoolout room */
 452                 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 453                 CtdlFreeMessage(imsg);
 454         }
 455
 456         /*
 457          * Process digest recipients
 458          */
 459         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 460                 fprintf(sc->digestfp,   " -----------------------------------"
 461                                         "------------------------------------"
 462                                         "-------\n");
 463                 CtdlRedirectOutput(sc->digestfp, -1);
 464                 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 0);
 465                 CtdlRedirectOutput(NULL, -1);
 466                 sc->num_msgs_spooled += 1;
 467         }
 468
 469         /*
 470          * Process IGnet push shares
 471          */
 472         if (sc->ignet_push_shares != NULL) {
 473
 474                 msg = CtdlFetchMessage(msgnum);
 475                 if (msg != NULL) {
 476                         size_t newpath_len;
 477
 478                         /* Prepend our node name to the Path field whenever
 479                          * sending a message to another IGnet node
 480                          */
 481                         if (msg->cm_fields['P'] == NULL) {
 482                                 msg->cm_fields['P'] = strdoop("username");
 483                         }
 484                         newpath_len = strlen(msg->cm_fields['P']) +
 485                                  strlen(config.c_nodename) + 2;
 486                         newpath = mallok(newpath_len);
 487                         snprintf(newpath, newpath_len, "%s!%s",
 488                                  config.c_nodename, msg->cm_fields['P']);
 489                         phree(msg->cm_fields['P']);
 490                         msg->cm_fields['P'] = newpath;
 491
 492                         /*
 493                          * Force the message to appear in the correct room
 494                          * on the far end by setting the C field correctly
 495                          */
 496                         if (msg->cm_fields['C'] != NULL) {
 497                                 phree(msg->cm_fields['C']);
 498                         }
 499                         msg->cm_fields['C'] = strdoop(CC->quickroom.QRname);
 500
 501                         /*
 502                          * Determine if this message is set to be deleted
 503                          * after sending out on the network
 504                          */
 505                         if (msg->cm_fields['S'] != NULL) {
 506                                 if (!strcasecmp(msg->cm_fields['S'],
 507                                    "CANCEL")) {
 508                                         delete_after_send = 1;
 509                                 }
 510                         }
 511
 512                         /*
 513                          * Now serialize it for transmission
 514                          */
 515                         serialize_message(&sermsg, msg);
 516
 517                         /* Now send it to every node */
 518                         for (nptr = sc->ignet_push_shares; nptr != NULL;
 519                             nptr = nptr->next) {
 520
 521                                 send = 1;
 522
 523                                 /* Check for valid node name */
 524                                 if (is_valid_node(NULL,NULL,nptr->name) != 0) {
 525                                         lprintf(3, "Invalid node <%s>\n",
 526                                                 nptr->name);
 527                                         send = 0;
 528                                 }
 529
 530                                 /* Check for split horizon */
 531                                 lprintf(9, "Path is %s\n", msg->cm_fields['P']);
 532                                 bang = num_tokens(msg->cm_fields['P'], '!');
 533                                 if (bang > 1) for (i=0; i<(bang-1); ++i) {
 534                                         extract_token(buf, msg->cm_fields['P'],
 535                                                 i, '!');
 536                                         if (!strcasecmp(buf, nptr->name)) {
 537                                                 send = 0;
 538                                         }
 539                                 }
 540
 541                                 /* Send the message */
 542                                 if (send == 1) {
 543                                         snprintf(filename, sizeof filename,
 544                                                 "./network/spoolout/%s",
 545                                                 nptr->name);
 546                                         fp = fopen(filename, "ab");
 547                                         if (fp != NULL) {
 548                                                 fwrite(sermsg.ser,
 549                                                         sermsg.len, 1, fp);
 550                                                 fclose(fp);
 551                                         }
 552                                 }
 553                         }
 554                         phree(sermsg.ser);
 555                         CtdlFreeMessage(msg);
 556                 }
 557         }
 558
 559         /* update lastsent */
 560         sc->lastsent = msgnum;
 561
 562         /* Delete this message if delete-after-send is set */
 563         if (delete_after_send) {
 564                 CtdlDeleteMessages(CC->quickroom.QRname, msgnum, "");
 565         }
 566
 567 }
 568
 569
 570 /*
 571  * Deliver digest messages
 572  */
 573 void network_deliver_digest(struct SpoolControl *sc) {
 574         char buf[SIZ];
 575         int i;
 576         struct CtdlMessage *msg;
 577         long msglen;
 578         long msgnum;
 579         char *instr = NULL;
 580         size_t instr_len = SIZ;
 581         struct CtdlMessage *imsg;
 582         struct namelist *nptr;
 583
 584         if (sc->num_msgs_spooled < 1) {
 585                 fclose(sc->digestfp);
 586                 sc->digestfp = NULL;
 587                 return;
 588         }
 589
 590         msg = mallok(sizeof(struct CtdlMessage));
 591         memset(msg, 0, sizeof(struct CtdlMessage));
 592         msg->cm_magic = CTDLMESSAGE_MAGIC;
 593         msg->cm_format_type = FMT_RFC822;
 594         msg->cm_anon_type = MES_NORMAL;
 595
 596         sprintf(buf, "%ld", time(NULL));
 597         msg->cm_fields['T'] = strdoop(buf);
 598         msg->cm_fields['A'] = strdoop(CC->quickroom.QRname);
 599         msg->cm_fields['U'] = strdoop(CC->quickroom.QRname);
 600         sprintf(buf, "room_%s@%s", CC->quickroom.QRname, config.c_fqdn);
 601         for (i=0; i<strlen(buf); ++i) {
 602                 if (isspace(buf[i])) buf[i]='_';
 603                 buf[i] = tolower(buf[i]);
 604         }
 605         msg->cm_fields['F'] = strdoop(buf);
 606
 607         fseek(sc->digestfp, 0L, SEEK_END);
 608         msglen = ftell(sc->digestfp);
 609
 610         msg->cm_fields['M'] = mallok(msglen + 1);
 611         fseek(sc->digestfp, 0L, SEEK_SET);
 612         fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 613         msg->cm_fields['M'][msglen] = 0;
 614
 615         fclose(sc->digestfp);
 616         sc->digestfp = NULL;
 617
 618         msgnum = CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
 619         CtdlFreeMessage(msg);
 620
 621         /* Now generate the delivery instructions */
 622
 623         /*
 624          * Figure out how big a buffer we need to allocate
 625          */
 626         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 627                 instr_len = instr_len + strlen(nptr->name);
 628         }
 629
 630         /*
 631          * allocate...
 632          */
 633         lprintf(9, "Generating delivery instructions\n");
 634         instr = mallok(instr_len);
 635         if (instr == NULL) {
 636                 lprintf(1, "Cannot allocate %ld bytes for instr...\n",
 637                         (long)instr_len);
 638                 abort();
 639         }
 640         snprintf(instr, instr_len,
 641                 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 642                 "bounceto|postmaster@%s\n" ,
 643                 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
 644
 645         /* Generate delivery instructions for each recipient */
 646         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 647                 size_t tmp = strlen(instr);
 648                 snprintf(&instr[tmp], instr_len - tmp,
 649                          "remote|%s|0||\n", nptr->name);
 650         }
 651
 652         /*
 653          * Generate a message from the instructions
 654          */
 655         imsg = mallok(sizeof(struct CtdlMessage));
 656         memset(imsg, 0, sizeof(struct CtdlMessage));
 657         imsg->cm_magic = CTDLMESSAGE_MAGIC;
 658         imsg->cm_anon_type = MES_NORMAL;
 659         imsg->cm_format_type = FMT_RFC822;
 660         imsg->cm_fields['A'] = strdoop("Citadel");
 661         imsg->cm_fields['M'] = instr;
 662
 663         /* Save delivery instructions in spoolout room */
 664         CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 665         CtdlFreeMessage(imsg);
 666 }
 667
 668
 669 /*
 670  * Batch up and send all outbound traffic from the current room
 671  */
 672 void network_spoolout_room(char *room_to_spool) {
 673         char filename[SIZ];
 674         char buf[SIZ];
 675         char instr[SIZ];
 676         FILE *fp;
 677         struct SpoolControl sc;
 678         struct namelist *nptr;
 679         size_t miscsize = 0;
 680         size_t linesize = 0;
 681
 682         lprintf(7, "Spooling <%s>\n", room_to_spool);
 683         if (getroom(&CC->quickroom, room_to_spool) != 0) {
 684                 lprintf(1, "ERROR: cannot load <%s>\n", room_to_spool);
 685                 return;
 686         }
 687
 688         memset(&sc, 0, sizeof(struct SpoolControl));
 689         assoc_file_name(filename, sizeof filename, &CC->quickroom, "netconfigs");
 690
 691         fp = fopen(filename, "r");
 692         if (fp == NULL) {
 693                 lprintf(7, "Outbound batch processing skipped for <%s>\n",
 694                         CC->quickroom.QRname);
 695                 return;
 696         }
 697
 698         lprintf(5, "Outbound batch processing started for <%s>\n",
 699                 CC->quickroom.QRname);
 700
 701         while (fgets(buf, sizeof buf, fp) != NULL) {
 702                 buf[strlen(buf)-1] = 0;
 703
 704                 extract(instr, buf, 0);
 705                 if (!strcasecmp(instr, "lastsent")) {
 706                         sc.lastsent = extract_long(buf, 1);
 707                 }
 708                 else if (!strcasecmp(instr, "listrecp")) {
 709                         nptr = (struct namelist *)
 710                                 mallok(sizeof(struct namelist));
 711                         nptr->next = sc.listrecps;
 712                         extract(nptr->name, buf, 1);
 713                         sc.listrecps = nptr;
 714                 }
 715                 else if (!strcasecmp(instr, "digestrecp")) {
 716                         nptr = (struct namelist *)
 717                                 mallok(sizeof(struct namelist));
 718                         nptr->next = sc.digestrecps;
 719                         extract(nptr->name, buf, 1);
 720                         sc.digestrecps = nptr;
 721                 }
 722                 else if (!strcasecmp(instr, "ignet_push_share")) {
 723                         nptr = (struct namelist *)
 724                                 mallok(sizeof(struct namelist));
 725                         nptr->next = sc.ignet_push_shares;
 726                         extract(nptr->name, buf, 1);
 727                         sc.ignet_push_shares = nptr;
 728                 }
 729                 else {
 730                         linesize = strlen(buf);
 731                         sc.misc = realloc(sc.misc,
 732                                 (miscsize + linesize + 2) );
 733                         sprintf(&sc.misc[miscsize], "%s\n", buf);
 734                         miscsize = miscsize + linesize + 1;
 735                 }
 736
 737
 738         }
 739         fclose(fp);
 740
 741         /* If there are digest recipients, we have to build a digest */
 742         if (sc.digestrecps != NULL) {
 743                 sc.digestfp = tmpfile();
 744                 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
 745         }
 746
 747         /* Do something useful */
 748         CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL,
 749                 network_spool_msg, &sc);
 750
 751         /* If we wrote a digest, deliver it and then close it */
 752         if (sc.digestfp != NULL) {
 753                 fprintf(sc.digestfp,    " -----------------------------------"
 754                                         "------------------------------------"
 755                                         "-------\n"
 756                                         "You are subscribed to the '%s' "
 757                                         "list.\n",
 758                                         CC->quickroom.QRname
 759                 );
 760                 network_deliver_digest(&sc);    /* deliver and close */
 761         }
 762
 763         /* Now rewrite the config file */
 764         fp = fopen(filename, "w");
 765         if (fp == NULL) {
 766                 lprintf(1, "ERROR: cannot open %s: %s\n",
 767                         filename, strerror(errno));
 768         }
 769         else {
 770                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
 771
 772                 /* Write out the listrecps while freeing from memory at the
 773                  * same time.  Am I clever or what?  :)
 774                  */
 775                 while (sc.listrecps != NULL) {
 776                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
 777                         nptr = sc.listrecps->next;
 778                         phree(sc.listrecps);
 779                         sc.listrecps = nptr;
 780                 }
 781                 /* Do the same for digestrecps */
 782                 while (sc.digestrecps != NULL) {
 783                         fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
 784                         nptr = sc.digestrecps->next;
 785                         phree(sc.digestrecps);
 786                         sc.digestrecps = nptr;
 787                 }
 788                 while (sc.ignet_push_shares != NULL) {
 789                         fprintf(fp, "ignet_push_share|%s\n",
 790                                 sc.ignet_push_shares->name);
 791                         nptr = sc.ignet_push_shares->next;
 792                         phree(sc.ignet_push_shares);
 793                         sc.ignet_push_shares = nptr;
 794                 }
 795                 fwrite(sc.misc, strlen(sc.misc), 1, fp);
 796                 phree(sc.misc);
 797
 798                 fclose(fp);
 799         }
 800
 801         lprintf(5, "Outbound batch processing finished for <%s>\n",
 802                 CC->quickroom.QRname);
 803 }
 804
 805
 806 /*
 807  * Batch up and send all outbound traffic from the current room
 808  */
 809 void network_queue_room(struct quickroom *qrbuf, void *data) {
 810         struct RoomProcList *ptr;
 811
 812         ptr = (struct RoomProcList *) mallok(sizeof (struct RoomProcList));
 813         if (ptr == NULL) return;
 814
 815         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
 816         ptr->next = rplist;
 817         rplist = ptr;
 818 }
 819
 820
 821 /*
 822  * Learn topology from path fields
 823  */
 824 void network_learn_topology(char *node, char *path) {
 825         char nexthop[SIZ];
 826         struct NetMap *nmptr;
 827
 828         strcpy(nexthop, "");
 829
 830         if (num_tokens(path, '!') < 3) return;
 831         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 832                 if (!strcasecmp(nmptr->nodename, node)) {
 833                         extract_token(nmptr->nexthop, path, 0, '!');
 834                         nmptr->lastcontact = time(NULL);
 835                         return;
 836                 }
 837         }
 838
 839         /* If we got here then it's not in the map, so add it. */
 840         nmptr = (struct NetMap *) mallok(sizeof (struct NetMap));
 841         strcpy(nmptr->nodename, node);
 842         nmptr->lastcontact = time(NULL);
 843         extract_token(nmptr->nexthop, path, 0, '!');
 844         nmptr->next = the_netmap;
 845         the_netmap = nmptr;
 846 }
 847
 848
 849
 850
 851 /*
 852  * Bounce a message back to the sender
 853  */
 854 void network_bounce(struct CtdlMessage *msg, char *reason) {
 855         char *oldpath = NULL;
 856         char buf[SIZ];
 857         char bouncesource[SIZ];
 858         char recipient[SIZ];
 859         struct recptypes *valid = NULL;
 860         char force_room[ROOMNAMELEN];
 861         static int serialnum = 0;
 862         size_t size;
 863
 864         lprintf(9, "entering network_bounce()\n");
 865
 866         if (msg == NULL) return;
 867
 868         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
 869
 870         /*
 871          * Give it a fresh message ID
 872          */
 873         if (msg->cm_fields['I'] != NULL) {
 874                 phree(msg->cm_fields['I']);
 875         }
 876         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
 877                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
 878         msg->cm_fields['I'] = strdoop(buf);
 879
 880         /*
 881          * FIXME ... right now we're just sending a bounce; we really want to
 882          * include the text of the bounced message.
 883          */
 884         if (msg->cm_fields['M'] != NULL) {
 885                 phree(msg->cm_fields['M']);
 886         }
 887         msg->cm_fields['M'] = strdoop(reason);
 888         msg->cm_format_type = 0;
 889
 890         /*
 891          * Turn the message around
 892          */
 893         if (msg->cm_fields['R'] == NULL) {
 894                 phree(msg->cm_fields['R']);
 895         }
 896
 897         if (msg->cm_fields['D'] == NULL) {
 898                 phree(msg->cm_fields['D']);
 899         }
 900
 901         snprintf(recipient, sizeof recipient, "%s@%s",
 902                 msg->cm_fields['A'], msg->cm_fields['N']);
 903
 904         if (msg->cm_fields['A'] == NULL) {
 905                 phree(msg->cm_fields['A']);
 906         }
 907
 908         if (msg->cm_fields['N'] == NULL) {
 909                 phree(msg->cm_fields['N']);
 910         }
 911
 912         msg->cm_fields['A'] = strdoop(BOUNCESOURCE);
 913         msg->cm_fields['N'] = strdoop(config.c_nodename);
 914
 915
 916         /* prepend our node to the path */
 917         if (msg->cm_fields['P'] != NULL) {
 918                 oldpath = msg->cm_fields['P'];
 919                 msg->cm_fields['P'] = NULL;
 920         }
 921         else {
 922                 oldpath = strdoop("unknown_user");
 923         }
 924         size = strlen(oldpath) + SIZ;
 925         msg->cm_fields['P'] = mallok(size);
 926         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
 927         phree(oldpath);
 928
 929         /* Now submit the message */
 930         valid = validate_recipients(recipient);
 931         if (valid != NULL) if (valid->num_error > 0) {
 932                 phree(valid);
 933                 valid = NULL;
 934         }
 935         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 936                 strcpy(force_room, config.c_aideroom);
 937         }
 938         else {
 939                 strcpy(force_room, "");
 940         }
 941         if ( (valid == NULL) && (strlen(force_room) == 0) ) {
 942                 strcpy(force_room, config.c_aideroom);
 943         }
 944         CtdlSubmitMsg(msg, valid, force_room);
 945
 946         /* Clean up */
 947         if (valid != NULL) phree(valid);
 948         CtdlFreeMessage(msg);
 949         lprintf(9, "leaving network_bounce()\n");
 950 }
 951
 952
 953
 954
 955 /*
 956  * Process a buffer containing a single message from a single file
 957  * from the inbound queue
 958  */
 959 void network_process_buffer(char *buffer, long size) {
 960         struct CtdlMessage *msg;
 961         long pos;
 962         int field;
 963         struct recptypes *recp = NULL;
 964         char target_room[ROOMNAMELEN];
 965         struct ser_ret sermsg;
 966         char *oldpath = NULL;
 967         char filename[SIZ];
 968         FILE *fp;
 969         char buf[SIZ];
 970
 971         /* Set default target room to trash */
 972         strcpy(target_room, TWITROOM);
 973
 974         /* Load the message into memory */
 975         msg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
 976         memset(msg, 0, sizeof(struct CtdlMessage));
 977         msg->cm_magic = CTDLMESSAGE_MAGIC;
 978         msg->cm_anon_type = buffer[1];
 979         msg->cm_format_type = buffer[2];
 980
 981         for (pos = 3; pos < size; ++pos) {
 982                 field = buffer[pos];
 983                 msg->cm_fields[field] = strdoop(&buffer[pos+1]);
 984                 pos = pos + strlen(&buffer[(int)pos]);
 985         }
 986
 987         /* Check for message routing */
 988         if (msg->cm_fields['D'] != NULL) {
 989                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 990
 991                         /* route the message */
 992                         if (is_valid_node(NULL, NULL,
 993                            msg->cm_fields['D']) == 0) {
 994
 995                                 /* prepend our node to the path */
 996                                 if (msg->cm_fields['P'] != NULL) {
 997                                         oldpath = msg->cm_fields['P'];
 998                                         msg->cm_fields['P'] = NULL;
 999                                 }
1000                                 else {
1001                                         oldpath = strdoop("unknown_user");
1002                                 }
1003                                 size = strlen(oldpath) + SIZ;
1004                                 msg->cm_fields['P'] = mallok(size);
1005                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1006                                         config.c_nodename, oldpath);
1007                                 phree(oldpath);
1008
1009                                 /* serialize the message */
1010                                 serialize_message(&sermsg, msg);
1011
1012                                 /* now send it */
1013                                 snprintf(filename, sizeof filename,
1014                                         "./network/spoolout/%s",
1015                                         msg->cm_fields['D']);
1016                                 fp = fopen(filename, "ab");
1017                                 if (fp != NULL) {
1018                                         fwrite(sermsg.ser,
1019                                                 sermsg.len, 1, fp);
1020                                         fclose(fp);
1021                                 }
1022                                 phree(sermsg.ser);
1023                                 CtdlFreeMessage(msg);
1024                                 return;
1025                         }
1026
1027                         else {  /* invalid destination node name */
1028
1029                                 network_bounce(msg,
1030 "A message you sent could not be delivered due to an invalid destination node"
1031 " name.  Please check the address and try sending the message again.\n");
1032                                 msg = NULL;
1033                                 return;
1034
1035                         }
1036                 }
1037         }
1038
1039         /*
1040          * Check to see if we already have a copy of this message
1041          */
1042         if (network_usetable(msg) != 0) {
1043                 snprintf(buf, sizeof buf,
1044                         "Loopzapper rejected message <%s> "
1045                         "from <%s> in <%s> @ <%s>\n",
1046                         ((msg->cm_fields['I']!=NULL)?(msg->cm_fields['I']):""),
1047                         ((msg->cm_fields['A']!=NULL)?(msg->cm_fields['A']):""),
1048                         ((msg->cm_fields['O']!=NULL)?(msg->cm_fields['O']):""),
1049                         ((msg->cm_fields['N']!=NULL)?(msg->cm_fields['N']):"")
1050                 );
1051                 aide_message(buf);
1052                 CtdlFreeMessage(msg);
1053                 msg = NULL;
1054                 return;
1055         }
1056
1057         /* Learn network topology from the path */
1058         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1059                 network_learn_topology(msg->cm_fields['N'],
1060                                         msg->cm_fields['P']);
1061         }
1062
1063         /* Does it have a recipient?  If so, validate it... */
1064         if (msg->cm_fields['R'] != NULL) {
1065                 recp = validate_recipients(msg->cm_fields['R']);
1066                 if (recp != NULL) if (recp->num_error > 0) {
1067                         network_bounce(msg,
1068 "A message you sent could not be delivered due to an invalid address.\n"
1069 "Please check the address and try sending the message again.\n");
1070                         msg = NULL;
1071                         phree(recp);
1072                         return;
1073                 }
1074                 strcpy(target_room, "");        /* no target room if mail */
1075         }
1076
1077         else if (msg->cm_fields['C'] != NULL) {
1078                 safestrncpy(target_room,
1079                         msg->cm_fields['C'],
1080                         sizeof target_room);
1081         }
1082
1083         else if (msg->cm_fields['O'] != NULL) {
1084                 safestrncpy(target_room,
1085                         msg->cm_fields['O'],
1086                         sizeof target_room);
1087         }
1088
1089         /* Strip out fields that are only relevant during transit */
1090         if (msg->cm_fields['D'] != NULL) {
1091                 phree(msg->cm_fields['D']);
1092                 msg->cm_fields['D'] = NULL;
1093         }
1094         if (msg->cm_fields['C'] != NULL) {
1095                 phree(msg->cm_fields['C']);
1096                 msg->cm_fields['C'] = NULL;
1097         }
1098
1099         /* save the message into a room */
1100         if (PerformNetprocHooks(msg, target_room) == 0) {
1101                 msg->cm_flags = CM_SKIP_HOOKS;
1102                 CtdlSubmitMsg(msg, recp, target_room);
1103         }
1104         CtdlFreeMessage(msg);
1105         phree(recp);
1106 }
1107
1108
1109 /*
1110  * Process a single message from a single file from the inbound queue
1111  */
1112 void network_process_message(FILE *fp, long msgstart, long msgend) {
1113         long hold_pos;
1114         long size;
1115         char *buffer;
1116
1117         hold_pos = ftell(fp);
1118         size = msgend - msgstart + 1;
1119         buffer = mallok(size);
1120         if (buffer != NULL) {
1121                 fseek(fp, msgstart, SEEK_SET);
1122                 fread(buffer, size, 1, fp);
1123                 network_process_buffer(buffer, size);
1124                 phree(buffer);
1125         }
1126
1127         fseek(fp, hold_pos, SEEK_SET);
1128 }
1129
1130
1131 /*
1132  * Process a single file from the inbound queue
1133  */
1134 void network_process_file(char *filename) {
1135         FILE *fp;
1136         long msgstart = (-1L);
1137         long msgend = (-1L);
1138         long msgcur = 0L;
1139         int ch;
1140
1141         lprintf(7, "network: processing <%s>\n", filename);
1142
1143         fp = fopen(filename, "rb");
1144         if (fp == NULL) {
1145                 lprintf(5, "Error opening %s: %s\n",
1146                         filename, strerror(errno));
1147                 return;
1148         }
1149
1150         /* Look for messages in the data stream and break them out */
1151         while (ch = getc(fp), ch >= 0) {
1152
1153                 if (ch == 255) {
1154                         if (msgstart >= 0L) {
1155                                 msgend = msgcur - 1;
1156                                 network_process_message(fp, msgstart, msgend);
1157                         }
1158                         msgstart = msgcur;
1159                 }
1160
1161                 ++msgcur;
1162         }
1163
1164         msgend = msgcur - 1;
1165         if (msgstart >= 0L) {
1166                 network_process_message(fp, msgstart, msgend);
1167         }
1168
1169         fclose(fp);
1170         unlink(filename);
1171 }
1172
1173
1174 /*
1175  * Process anything in the inbound queue
1176  */
1177 void network_do_spoolin(void) {
1178         DIR *dp;
1179         struct dirent *d;
1180         char filename[SIZ];
1181
1182         dp = opendir("./network/spoolin");
1183         if (dp == NULL) return;
1184
1185         while (d = readdir(dp), d != NULL) {
1186                 snprintf(filename, sizeof filename, "./network/spoolin/%s", d->d_name);
1187                 network_process_file(filename);
1188         }
1189
1190
1191         closedir(dp);
1192 }
1193
1194
1195
1196
1197
1198 /*
1199  * receive network spool from the remote system
1200  */
1201 void receive_spool(int sock, char *remote_nodename) {
1202         long download_len;
1203         long bytes_received;
1204         char buf[SIZ];
1205         static char pbuf[IGNET_PACKET_SIZE];
1206         char tempfilename[PATH_MAX];
1207         long plen;
1208         FILE *fp;
1209
1210         strcpy(tempfilename, tmpnam(NULL));
1211         if (sock_puts(sock, "NDOP") < 0) return;
1212         if (sock_gets(sock, buf) < 0) return;
1213         lprintf(9, "<%s\n", buf);
1214         if (buf[0] != '2') {
1215                 return;
1216         }
1217         download_len = extract_long(&buf[4], 0);
1218
1219         bytes_received = 0L;
1220         fp = fopen(tempfilename, "w");
1221         if (fp == NULL) {
1222                 lprintf(9, "cannot open download file locally: %s\n",
1223                         strerror(errno));
1224                 return;
1225         }
1226
1227         while (bytes_received < download_len) {
1228                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1229                         bytes_received,
1230                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1231                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1232                 if (sock_puts(sock, buf) < 0) {
1233                         fclose(fp);
1234                         unlink(tempfilename);
1235                         return;
1236                 }
1237                 if (sock_gets(sock, buf) < 0) {
1238                         fclose(fp);
1239                         unlink(tempfilename);
1240                         return;
1241                 }
1242                 if (buf[0] == '6') {
1243                         plen = extract_long(&buf[4], 0);
1244                         if (sock_read(sock, pbuf, plen) < 0) {
1245                                 fclose(fp);
1246                                 unlink(tempfilename);
1247                                 return;
1248                         }
1249                         fwrite((char *) pbuf, plen, 1, fp);
1250                         bytes_received = bytes_received + plen;
1251                 }
1252         }
1253
1254         fclose(fp);
1255         if (sock_puts(sock, "CLOS") < 0) {
1256                 unlink(tempfilename);
1257                 return;
1258         }
1259         if (sock_gets(sock, buf) < 0) {
1260                 unlink(tempfilename);
1261                 return;
1262         }
1263         lprintf(9, "%s\n", buf);
1264         snprintf(buf, sizeof buf, "mv %s ./network/spoolin/%s.%ld",
1265                 tempfilename, remote_nodename, (long) getpid());
1266         system(buf);
1267 }
1268
1269
1270
1271 /*
1272  * transmit network spool to the remote system
1273  */
1274 void transmit_spool(int sock, char *remote_nodename)
1275 {
1276         char buf[SIZ];
1277         char pbuf[4096];
1278         long plen;
1279         long bytes_to_write, thisblock;
1280         int fd;
1281         char sfname[128];
1282
1283         if (sock_puts(sock, "NUOP") < 0) return;
1284         if (sock_gets(sock, buf) < 0) return;
1285         lprintf(9, "<%s\n", buf);
1286         if (buf[0] != '2') {
1287                 return;
1288         }
1289
1290         snprintf(sfname, sizeof sfname, "./network/spoolout/%s", remote_nodename);
1291         fd = open(sfname, O_RDONLY);
1292         if (fd < 0) {
1293                 if (errno == ENOENT) {
1294                         lprintf(9, "Nothing to send.\n");
1295                 } else {
1296                         lprintf(5, "cannot open upload file locally: %s\n",
1297                                 strerror(errno));
1298                 }
1299                 return;
1300         }
1301         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1302                 bytes_to_write = plen;
1303                 while (bytes_to_write > 0L) {
1304                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1305                         if (sock_puts(sock, buf) < 0) {
1306                                 close(fd);
1307                                 return;
1308                         }
1309                         if (sock_gets(sock, buf) < 0) {
1310                                 close(fd);
1311                                 return;
1312                         }
1313                         thisblock = atol(&buf[4]);
1314                         if (buf[0] == '7') {
1315                                 if (sock_write(sock, pbuf,
1316                                    (int) thisblock) < 0) {
1317                                         close(fd);
1318                                         return;
1319                                 }
1320                                 bytes_to_write = bytes_to_write - thisblock;
1321                         } else {
1322                                 goto ABORTUPL;
1323                         }
1324                 }
1325         }
1326
1327 ABORTUPL:
1328         close(fd);
1329         if (sock_puts(sock, "UCLS 1") < 0) return;
1330         if (sock_gets(sock, buf) < 0) return;
1331         lprintf(9, "<%s\n", buf);
1332         if (buf[0] == '2') {
1333                 unlink(sfname);
1334         }
1335 }
1336
1337
1338
1339 /*
1340  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1341  */
1342 void network_poll_node(char *node, char *secret, char *host, char *port) {
1343         int sock;
1344         char buf[SIZ];
1345
1346         if (network_talking_to(node, NTT_CHECK)) return;
1347         network_talking_to(node, NTT_ADD);
1348         lprintf(5, "Polling node <%s> at %s:%s\n", node, host, port);
1349
1350         sock = sock_connect(host, port, "tcp");
1351         if (sock < 0) {
1352                 lprintf(7, "Could not connect: %s\n", strerror(errno));
1353                 network_talking_to(node, NTT_REMOVE);
1354                 return;
1355         }
1356
1357         lprintf(9, "Connected!\n");
1358
1359         /* Read the server greeting */
1360         if (sock_gets(sock, buf) < 0) goto bail;
1361         lprintf(9, ">%s\n", buf);
1362
1363         /* Identify ourselves */
1364         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1365         lprintf(9, "<%s\n", buf);
1366         if (sock_puts(sock, buf) <0) goto bail;
1367         if (sock_gets(sock, buf) < 0) goto bail;
1368         lprintf(9, ">%s\n", buf);
1369         if (buf[0] != '2') goto bail;
1370
1371         /* At this point we are authenticated. */
1372         receive_spool(sock, node);
1373         transmit_spool(sock, node);
1374
1375         sock_puts(sock, "QUIT");
1376 bail:   sock_close(sock);
1377         network_talking_to(node, NTT_REMOVE);
1378 }
1379
1380
1381
1382 /*
1383  * Poll other Citadel nodes and transfer inbound/outbound network data.
1384  */
1385 void network_poll_other_citadel_nodes(void) {
1386         char *ignetcfg = NULL;
1387         int i;
1388         char linebuf[SIZ];
1389         char node[SIZ];
1390         char host[SIZ];
1391         char port[SIZ];
1392         char secret[SIZ];
1393
1394         ignetcfg = CtdlGetSysConfig(IGNETCFG);
1395         if (ignetcfg == NULL) return;   /* no nodes defined */
1396
1397         /* Use the string tokenizer to grab one line at a time */
1398         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
1399                 extract_token(linebuf, ignetcfg, i, '\n');
1400                 extract(node, linebuf, 0);
1401                 extract(secret, linebuf, 1);
1402                 extract(host, linebuf, 2);
1403                 extract(port, linebuf, 3);
1404                 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1405                    && (strlen(host) > 0) && strlen(port) > 0) {
1406                         network_poll_node(node, secret, host, port);
1407                 }
1408         }
1409
1410         phree(ignetcfg);
1411 }
1412
1413
1414
1415
1416
1417
1418
1419 /*
1420  * network_do_queue()
1421  *
1422  * Run through the rooms doing various types of network stuff.
1423  */
1424 void network_do_queue(void) {
1425         static int doing_queue = 0;
1426         static time_t last_run = 0L;
1427         struct RoomProcList *ptr;
1428
1429         /*
1430          * Run no more frequently than once every n seconds
1431          */
1432         if ( (time(NULL) - last_run) < config.c_net_freq ) return;
1433
1434         /*
1435          * This is a simple concurrency check to make sure only one queue run
1436          * is done at a time.  We could do this with a mutex, but since we
1437          * don't really require extremely fine granularity here, we'll do it
1438          * with a static variable instead.
1439          */
1440         if (doing_queue) return;
1441         doing_queue = 1;
1442         last_run = time(NULL);
1443
1444         /*
1445          * Poll other Citadel nodes.
1446          */
1447         network_poll_other_citadel_nodes();
1448
1449         /*
1450          * Load the network map and filter list into memory.
1451          */
1452         read_network_map();
1453         filterlist = load_filter_list();
1454
1455         /*
1456          * Go ahead and run the queue
1457          */
1458         lprintf(7, "network: loading outbound queue\n");
1459         ForEachRoom(network_queue_room, NULL);
1460
1461         lprintf(7, "network: running outbound queue\n");
1462         while (rplist != NULL) {
1463                 network_spoolout_room(rplist->name);
1464                 ptr = rplist;
1465                 rplist = rplist->next;
1466                 phree(ptr);
1467         }
1468
1469         lprintf(7, "network: processing inbound queue\n");
1470         network_do_spoolin();
1471
1472         /* Save the network map back to disk */
1473         write_network_map();
1474
1475         /* Free the filter list in memory */
1476         free_filter_list(filterlist);
1477         filterlist = NULL;
1478
1479         lprintf(7, "network: queue run completed\n");
1480         doing_queue = 0;
1481 }
1482
1483
1484 /*
1485  * cmd_netp() - authenticate to the server as another Citadel node polling
1486  *              for network traffic
1487  */
1488 void cmd_netp(char *cmdbuf)
1489 {
1490         char node[SIZ];
1491         char pass[SIZ];
1492
1493         char secret[SIZ];
1494         char nexthop[SIZ];
1495
1496         extract(node, cmdbuf, 0);
1497         extract(pass, cmdbuf, 1);
1498
1499         if (is_valid_node(nexthop, secret, node) != 0) {
1500                 cprintf("%d authentication failed\n", ERROR);
1501                 return;
1502         }
1503
1504         if (strcasecmp(pass, secret)) {
1505                 cprintf("%d authentication failed\n", ERROR);
1506                 return;
1507         }
1508
1509         if (network_talking_to(node, NTT_CHECK)) {
1510                 cprintf("%d Already talking to %s right now\n", ERROR, node);
1511                 return;
1512         }
1513
1514         safestrncpy(CC->net_node, node, sizeof CC->net_node);
1515         network_talking_to(node, NTT_ADD);
1516         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
1517                 CC->net_node);
1518 }
1519
1520
1521
1522
1523
1524 /*
1525  * Module entry point
1526  */
1527 char *Dynamic_Module_Init(void)
1528 {
1529         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1530         CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1531         CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1532         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
1533         return "$Id$";
1534 }