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  * ** 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  * FIXME
  21  * Don't allow polls during network processing
  22  */
  23
  24 #include "sysdep.h"
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <stdio.h>
  28 #include <fcntl.h>
  29 #include <ctype.h>
  30 #include <signal.h>
  31 #include <pwd.h>
  32 #include <errno.h>
  33 #include <sys/types.h>
  34 #include <dirent.h>
  35 #if TIME_WITH_SYS_TIME
  36 # include <sys/time.h>
  37 # include <time.h>
  38 #else
  39 # if HAVE_SYS_TIME_H
  40 #  include <sys/time.h>
  41 # else
  42 #  include <time.h>
  43 # endif
  44 #endif
  45
  46 #include <sys/wait.h>
  47 #include <string.h>
  48 #include <limits.h>
  49 #include "citadel.h"
  50 #include "server.h"
  51 #include "sysdep_decls.h"
  52 #include "citserver.h"
  53 #include "support.h"
  54 #include "config.h"
  55 #include "dynloader.h"
  56 #include "room_ops.h"
  57 #include "user_ops.h"
  58 #include "policy.h"
  59 #include "database.h"
  60 #include "msgbase.h"
  61 #include "tools.h"
  62 #include "internet_addressing.h"
  63 #include "serv_network.h"
  64 #include "clientsocket.h"
  65 #include "file_ops.h"
  66
  67 #ifndef HAVE_SNPRINTF
  68 #include "snprintf.h"
  69 #endif
  70
  71
  72 /*
  73  * When we do network processing, it's accomplished in two passes; one to
  74  * gather a list of rooms and one to actually do them.  It's ok that rplist
  75  * is global; this process *only* runs as part of the housekeeping loop and
  76  * therefore only one will run at a time.
  77  */
  78 struct RoomProcList *rplist = NULL;
  79
  80 /*
  81  * We build a map of network nodes during processing.
  82  */
  83 struct NetMap *the_netmap = NULL;
  84
  85 /*
  86  * Keep track of what messages to reject
  87  */
  88 struct FilterList *load_filter_list(void) {
  89         char *serialized_list = NULL;
  90         int i;
  91         char buf[SIZ];
  92         struct FilterList *newlist = NULL;
  93         struct FilterList *nptr;
  94
  95         serialized_list = CtdlGetSysConfig(FILTERLIST);
  96         if (serialized_list == NULL) return(NULL); /* if null, no entries */
  97
  98         /* Use the string tokenizer to grab one line at a time */
  99         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
 100                 extract_token(buf, serialized_list, i, '\n');
 101                 nptr = (struct FilterList *) mallok(sizeof(struct FilterList));
 102                 extract(nptr->fl_user, buf, 0);
 103                 striplt(nptr->fl_user);
 104                 extract(nptr->fl_room, buf, 1);
 105                 striplt(nptr->fl_room);
 106                 extract(nptr->fl_node, buf, 2);
 107                 striplt(nptr->fl_node);
 108
 109                 /* Cowardly refuse to add an any/any/any entry that would
 110                  * end up filtering every single message.
 111                  */
 112                 if (strlen(nptr->fl_user) + strlen(nptr->fl_room)
 113                    + strlen(nptr->fl_node) == 0) {
 114                         phree(nptr);
 115                 }
 116                 else {
 117                         nptr->next = newlist;
 118                         newlist = nptr;
 119                 }
 120         }
 121
 122         phree(serialized_list);
 123         return newlist;
 124 }
 125
 126
 127 void free_filter_list(struct FilterList *fl) {
 128         if (fl == NULL) return;
 129         free_filter_list(fl->next);
 130         phree(fl);
 131 }
 132
 133
 134
 135 /*
 136  * Check the use table.  This is a list of messages which have recently
 137  * arrived on the system.  It is maintained and queried to prevent the same
 138  * message from being entered into the database multiple times if it happens
 139  * to arrive multiple times by accident.
 140  */
 141 int network_usetable(struct CtdlMessage *msg) {
 142
 143         char msgid[SIZ];
 144         struct cdbdata *cdbut;
 145         struct UseTable ut;
 146
 147         /* Bail out if we can't generate a message ID */
 148         if (msg == NULL) {
 149                 return(0);
 150         }
 151         if (msg->cm_fields['I'] == NULL) {
 152                 return(0);
 153         }
 154         if (strlen(msg->cm_fields['I']) == 0) {
 155                 return(0);
 156         }
 157
 158         /* Generate the message ID */
 159         strcpy(msgid, msg->cm_fields['I']);
 160         if (haschar(msgid, '@') == 0) {
 161                 strcat(msgid, "@");
 162                 if (msg->cm_fields['N'] != NULL) {
 163                         strcat(msgid, msg->cm_fields['N']);
 164                 }
 165                 else {
 166                         return(0);
 167                 }
 168         }
 169
 170         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 171         if (cdbut != NULL) {
 172                 cdb_free(cdbut);
 173                 return(1);
 174         }
 175
 176         /* If we got to this point, it's unique: add it. */
 177         strcpy(ut.ut_msgid, msgid);
 178         ut.ut_timestamp = time(NULL);
 179         cdb_store(CDB_USETABLE, msgid, strlen(msgid),
 180                 &ut, sizeof(struct UseTable) );
 181         return(0);
 182 }
 183
 184
 185 /*
 186  * Read the network map from its configuration file into memory.
 187  */
 188 void read_network_map(void) {
 189         char *serialized_map = NULL;
 190         int i;
 191         char buf[SIZ];
 192         struct NetMap *nmptr;
 193
 194         serialized_map = CtdlGetSysConfig(IGNETMAP);
 195         if (serialized_map == NULL) return;     /* if null, no entries */
 196
 197         /* Use the string tokenizer to grab one line at a time */
 198         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 199                 extract_token(buf, serialized_map, i, '\n');
 200                 nmptr = (struct NetMap *) mallok(sizeof(struct NetMap));
 201                 extract(nmptr->nodename, buf, 0);
 202                 nmptr->lastcontact = extract_long(buf, 1);
 203                 extract(nmptr->nexthop, buf, 2);
 204                 nmptr->next = the_netmap;
 205                 the_netmap = nmptr;
 206         }
 207
 208         phree(serialized_map);
 209 }
 210
 211
 212 /*
 213  * Write the network map from memory back to the configuration file.
 214  */
 215 void write_network_map(void) {
 216         char *serialized_map = NULL;
 217         struct NetMap *nmptr;
 218
 219         serialized_map = strdoop("");
 220
 221         if (the_netmap != NULL) {
 222                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 223                         serialized_map = reallok(serialized_map,
 224                                                 (strlen(serialized_map)+SIZ) );
 225                         if (strlen(nmptr->nodename) > 0) {
 226                                 snprintf(&serialized_map[strlen(serialized_map)],
 227                                         SIZ,
 228                                         "%s|%ld|%s\n",
 229                                         nmptr->nodename,
 230                                         (long)nmptr->lastcontact,
 231                                         nmptr->nexthop);
 232                         }
 233                 }
 234         }
 235
 236         CtdlPutSysConfig(IGNETMAP, serialized_map);
 237         phree(serialized_map);
 238
 239         /* Now free the list */
 240         while (the_netmap != NULL) {
 241                 nmptr = the_netmap->next;
 242                 phree(the_netmap);
 243                 the_netmap = nmptr;
 244         }
 245 }
 246
 247
 248
 249 /*
 250  * Check the network map and determine whether the supplied node name is
 251  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 252  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 253  * shared secret.
 254  */
 255 int is_valid_node(char *nexthop, char *secret, char *node) {
 256         char *ignetcfg = NULL;
 257         int i;
 258         char linebuf[SIZ];
 259         char buf[SIZ];
 260         int retval;
 261         struct NetMap *nmptr;
 262
 263         if (node == NULL) {
 264                 return(-1);
 265         }
 266
 267         /*
 268          * First try the neighbor nodes
 269          */
 270         ignetcfg = CtdlGetSysConfig(IGNETCFG);
 271         if (ignetcfg == NULL) {
 272                 if (nexthop != NULL) {
 273                         strcpy(nexthop, "");
 274                 }
 275                 return(-1);
 276         }
 277
 278         retval = (-1);
 279         if (nexthop != NULL) {
 280                 strcpy(nexthop, "");
 281         }
 282
 283         /* Use the string tokenizer to grab one line at a time */
 284         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
 285                 extract_token(linebuf, ignetcfg, i, '\n');
 286                 extract(buf, linebuf, 0);
 287                 if (!strcasecmp(buf, node)) {
 288                         if (nexthop != NULL) {
 289                                 strcpy(nexthop, "");
 290                         }
 291                         if (secret != NULL) {
 292                                 extract(secret, linebuf, 1);
 293                         }
 294                         retval = 0;
 295                 }
 296         }
 297
 298         phree(ignetcfg);
 299         if (retval == 0) {
 300                 return(retval);         /* yup, it's a direct neighbor */
 301         }
 302
 303         /*
 304          * If we get to this point we have to see if we know the next hop
 305          */
 306         if (the_netmap != NULL) {
 307                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 308                         if (!strcasecmp(nmptr->nodename, node)) {
 309                                 if (nexthop != NULL) {
 310                                         strcpy(nexthop, nmptr->nexthop);
 311                                 }
 312                                 return(0);
 313                         }
 314                 }
 315         }
 316
 317         /*
 318          * If we get to this point, the supplied node name is bogus.
 319          */
 320         lprintf(5, "Invalid node name <%s>\n", node);
 321         return(-1);
 322 }
 323
 324
 325
 326
 327
 328 void cmd_gnet(char *argbuf) {
 329         char filename[SIZ];
 330         char buf[SIZ];
 331         FILE *fp;
 332
 333         if (CtdlAccessCheck(ac_room_aide)) return;
 334         assoc_file_name(filename, sizeof filename, &CC->quickroom, "netconfigs");
 335         cprintf("%d Network settings for room #%ld <%s>\n",
 336                 LISTING_FOLLOWS,
 337                 CC->quickroom.QRnumber, CC->quickroom.QRname);
 338
 339         fp = fopen(filename, "r");
 340         if (fp != NULL) {
 341                 while (fgets(buf, sizeof buf, fp) != NULL) {
 342                         buf[strlen(buf)-1] = 0;
 343                         cprintf("%s\n", buf);
 344                 }
 345                 fclose(fp);
 346         }
 347
 348         cprintf("000\n");
 349 }
 350
 351
 352 void cmd_snet(char *argbuf) {
 353         char tempfilename[SIZ];
 354         char filename[SIZ];
 355         char buf[SIZ];
 356         FILE *fp;
 357
 358         if (CtdlAccessCheck(ac_room_aide)) return;
 359         safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
 360         assoc_file_name(filename, sizeof filename, &CC->quickroom, "netconfigs");
 361
 362         fp = fopen(tempfilename, "w");
 363         if (fp == NULL) {
 364                 cprintf("%d Cannot open %s: %s\n",
 365                         ERROR+INTERNAL_ERROR,
 366                         tempfilename,
 367                         strerror(errno));
 368         }
 369
 370         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 371         while (client_gets(buf), strcmp(buf, "000")) {
 372                 fprintf(fp, "%s\n", buf);
 373         }
 374         fclose(fp);
 375
 376         /* Now copy the temp file to its permanent location
 377          * (We use /bin/mv instead of link() because they may be on
 378          * different filesystems)
 379          */
 380         unlink(filename);
 381         snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
 382         begin_critical_section(S_NETCONFIGS);
 383         system(buf);
 384         end_critical_section(S_NETCONFIGS);
 385 }
 386
 387
 388 /*
 389  * Spools out one message from the list.
 390  */
 391 void network_spool_msg(long msgnum, void *userdata) {
 392         struct SpoolControl *sc;
 393         int err;
 394         int i;
 395         char *newpath = NULL;
 396         char *instr = NULL;
 397         size_t instr_len = SIZ;
 398         struct CtdlMessage *msg = NULL;
 399         struct CtdlMessage *imsg;
 400         struct namelist *nptr;
 401         struct ser_ret sermsg;
 402         FILE *fp;
 403         char filename[SIZ];
 404         char buf[SIZ];
 405         int bang = 0;
 406         int send = 1;
 407         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 408
 409         sc = (struct SpoolControl *)userdata;
 410
 411         /*
 412          * Process mailing list recipients
 413          */
 414         if (sc->listrecps != NULL) {
 415
 416                 /* First, copy it to the spoolout room */
 417                 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
 418                 if (err != 0) return;
 419
 420                 /*
 421                  * Figure out how big a buffer we need to allocate
 422                  */
 423                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 424                         instr_len = instr_len + strlen(nptr->name);
 425                 }
 426
 427                 /*
 428                  * allocate...
 429                  */
 430                 lprintf(9, "Generating delivery instructions\n");
 431                 instr = mallok(instr_len);
 432                 if (instr == NULL) {
 433                         lprintf(1, "Cannot allocate %ld bytes for instr...\n",
 434                                 (long)instr_len);
 435                         abort();
 436                 }
 437                 snprintf(instr, instr_len,
 438                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 439                         "bounceto|postmaster@%s\n" ,
 440                         SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
 441
 442                 /* Generate delivery instructions for each recipient */
 443                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 444                         size_t tmp = strlen(instr);
 445                         snprintf(&instr[tmp], instr_len - tmp,
 446                                  "remote|%s|0||\n", nptr->name);
 447                 }
 448
 449                 /*
 450                  * Generate a message from the instructions
 451                  */
 452                 imsg = mallok(sizeof(struct CtdlMessage));
 453                 memset(imsg, 0, sizeof(struct CtdlMessage));
 454                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
 455                 imsg->cm_anon_type = MES_NORMAL;
 456                 imsg->cm_format_type = FMT_RFC822;
 457                 imsg->cm_fields['A'] = strdoop("Citadel");
 458                 imsg->cm_fields['M'] = instr;
 459
 460                 /* Save delivery instructions in spoolout room */
 461                 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 462                 CtdlFreeMessage(imsg);
 463         }
 464
 465         /*
 466          * Process digest recipients
 467          */
 468         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 469                 fprintf(sc->digestfp,   " -----------------------------------"
 470                                         "------------------------------------"
 471                                         "-------\n");
 472                 CtdlRedirectOutput(sc->digestfp, -1);
 473                 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 0);
 474                 CtdlRedirectOutput(NULL, -1);
 475                 sc->num_msgs_spooled += 1;
 476         }
 477
 478         /*
 479          * Process IGnet push shares
 480          */
 481         if (sc->ignet_push_shares != NULL) {
 482
 483                 msg = CtdlFetchMessage(msgnum);
 484                 if (msg != NULL) {
 485                         size_t newpath_len;
 486
 487                         /* Prepend our node name to the Path field whenever
 488                          * sending a message to another IGnet node
 489                          */
 490                         if (msg->cm_fields['P'] == NULL) {
 491                                 msg->cm_fields['P'] = strdoop("username");
 492                         }
 493                         newpath_len = strlen(msg->cm_fields['P']) +
 494                                  strlen(config.c_nodename) + 2;
 495                         newpath = mallok(newpath_len);
 496                         snprintf(newpath, newpath_len, "%s!%s",
 497                                  config.c_nodename, msg->cm_fields['P']);
 498                         phree(msg->cm_fields['P']);
 499                         msg->cm_fields['P'] = newpath;
 500
 501                         /*
 502                          * Force the message to appear in the correct room
 503                          * on the far end by setting the C field correctly
 504                          */
 505                         if (msg->cm_fields['C'] != NULL) {
 506                                 phree(msg->cm_fields['C']);
 507                         }
 508                         msg->cm_fields['C'] = strdoop(CC->quickroom.QRname);
 509
 510                         /*
 511                          * Determine if this message is set to be deleted
 512                          * after sending out on the network
 513                          */
 514                         if (msg->cm_fields['S'] != NULL) {
 515                                 if (!strcasecmp(msg->cm_fields['S'],
 516                                    "CANCEL")) {
 517                                         delete_after_send = 1;
 518                                 }
 519                         }
 520
 521                         /*
 522                          * Now serialize it for transmission
 523                          */
 524                         serialize_message(&sermsg, msg);
 525
 526                         /* Now send it to every node */
 527                         for (nptr = sc->ignet_push_shares; nptr != NULL;
 528                             nptr = nptr->next) {
 529
 530                                 send = 1;
 531
 532                                 /* Check for valid node name */
 533                                 if (is_valid_node(NULL,NULL,nptr->name) != 0) {
 534                                         lprintf(3, "Invalid node <%s>\n",
 535                                                 nptr->name);
 536                                         send = 0;
 537                                 }
 538
 539                                 /* Check for split horizon */
 540                                 lprintf(9, "Path is %s\n", msg->cm_fields['P']);
 541                                 bang = num_tokens(msg->cm_fields['P'], '!');
 542                                 if (bang > 1) for (i=0; i<(bang-1); ++i) {
 543                                         extract_token(buf, msg->cm_fields['P'],
 544                                                 i, '!');
 545                                         if (!strcasecmp(buf, nptr->name)) {
 546                                                 send = 0;
 547                                         }
 548                                 }
 549
 550                                 /* Send the message */
 551                                 if (send == 1) {
 552                                         snprintf(filename, sizeof filename,
 553                                                 "./network/spoolout/%s",
 554                                                 nptr->name);
 555                                         fp = fopen(filename, "ab");
 556                                         if (fp != NULL) {
 557                                                 fwrite(sermsg.ser,
 558                                                         sermsg.len, 1, fp);
 559                                                 fclose(fp);
 560                                         }
 561                                 }
 562                         }
 563                         phree(sermsg.ser);
 564                         CtdlFreeMessage(msg);
 565                 }
 566         }
 567
 568         /* update lastsent */
 569         sc->lastsent = msgnum;
 570
 571         /* Delete this message if delete-after-send is set */
 572         if (delete_after_send) {
 573                 CtdlDeleteMessages(CC->quickroom.QRname, msgnum, "");
 574         }
 575
 576 }
 577
 578
 579 /*
 580  * Deliver digest messages
 581  */
 582 void network_deliver_digest(struct SpoolControl *sc) {
 583         char buf[SIZ];
 584         int i;
 585         struct CtdlMessage *msg;
 586         long msglen;
 587         long msgnum;
 588         char *instr = NULL;
 589         size_t instr_len = SIZ;
 590         struct CtdlMessage *imsg;
 591         struct namelist *nptr;
 592
 593         if (sc->num_msgs_spooled < 1) {
 594                 fclose(sc->digestfp);
 595                 sc->digestfp = NULL;
 596                 return;
 597         }
 598
 599         msg = mallok(sizeof(struct CtdlMessage));
 600         memset(msg, 0, sizeof(struct CtdlMessage));
 601         msg->cm_magic = CTDLMESSAGE_MAGIC;
 602         msg->cm_format_type = FMT_RFC822;
 603         msg->cm_anon_type = MES_NORMAL;
 604
 605         sprintf(buf, "%ld", time(NULL));
 606         msg->cm_fields['T'] = strdoop(buf);
 607         msg->cm_fields['A'] = strdoop(CC->quickroom.QRname);
 608         msg->cm_fields['U'] = strdoop(CC->quickroom.QRname);
 609         sprintf(buf, "room_%s@%s", CC->quickroom.QRname, config.c_fqdn);
 610         for (i=0; i<strlen(buf); ++i) {
 611                 if (isspace(buf[i])) buf[i]='_';
 612                 buf[i] = tolower(buf[i]);
 613         }
 614         msg->cm_fields['F'] = strdoop(buf);
 615
 616         fseek(sc->digestfp, 0L, SEEK_END);
 617         msglen = ftell(sc->digestfp);
 618
 619         msg->cm_fields['M'] = mallok(msglen + 1);
 620         fseek(sc->digestfp, 0L, SEEK_SET);
 621         fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 622         msg->cm_fields['M'][msglen] = 0;
 623
 624         fclose(sc->digestfp);
 625         sc->digestfp = NULL;
 626
 627         msgnum = CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
 628         CtdlFreeMessage(msg);
 629
 630         /* Now generate the delivery instructions */
 631
 632         /*
 633          * Figure out how big a buffer we need to allocate
 634          */
 635         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 636                 instr_len = instr_len + strlen(nptr->name);
 637         }
 638
 639         /*
 640          * allocate...
 641          */
 642         lprintf(9, "Generating delivery instructions\n");
 643         instr = mallok(instr_len);
 644         if (instr == NULL) {
 645                 lprintf(1, "Cannot allocate %ld bytes for instr...\n",
 646                         (long)instr_len);
 647                 abort();
 648         }
 649         snprintf(instr, instr_len,
 650                 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 651                 "bounceto|postmaster@%s\n" ,
 652                 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
 653
 654         /* Generate delivery instructions for each recipient */
 655         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 656                 size_t tmp = strlen(instr);
 657                 snprintf(&instr[tmp], instr_len - tmp,
 658                          "remote|%s|0||\n", nptr->name);
 659         }
 660
 661         /*
 662          * Generate a message from the instructions
 663          */
 664         imsg = mallok(sizeof(struct CtdlMessage));
 665         memset(imsg, 0, sizeof(struct CtdlMessage));
 666         imsg->cm_magic = CTDLMESSAGE_MAGIC;
 667         imsg->cm_anon_type = MES_NORMAL;
 668         imsg->cm_format_type = FMT_RFC822;
 669         imsg->cm_fields['A'] = strdoop("Citadel");
 670         imsg->cm_fields['M'] = instr;
 671
 672         /* Save delivery instructions in spoolout room */
 673         CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 674         CtdlFreeMessage(imsg);
 675 }
 676
 677
 678 /*
 679  * Batch up and send all outbound traffic from the current room
 680  */
 681 void network_spoolout_room(char *room_to_spool) {
 682         char filename[SIZ];
 683         char buf[SIZ];
 684         char instr[SIZ];
 685         FILE *fp;
 686         struct SpoolControl sc;
 687         struct namelist *nptr;
 688         size_t miscsize = 0;
 689         size_t linesize = 0;
 690
 691         lprintf(7, "Spooling <%s>\n", room_to_spool);
 692         if (getroom(&CC->quickroom, room_to_spool) != 0) {
 693                 lprintf(1, "ERROR: cannot load <%s>\n", room_to_spool);
 694                 return;
 695         }
 696
 697         memset(&sc, 0, sizeof(struct SpoolControl));
 698         assoc_file_name(filename, sizeof filename, &CC->quickroom, "netconfigs");
 699
 700         begin_critical_section(S_NETCONFIGS);
 701         end_critical_section(S_NETCONFIGS);
 702
 703         fp = fopen(filename, "r");
 704         if (fp == NULL) {
 705                 lprintf(7, "Outbound batch processing skipped for <%s>\n",
 706                         CC->quickroom.QRname);
 707                 end_critical_section(S_NETCONFIGS);
 708                 return;
 709         }
 710
 711         lprintf(5, "Outbound batch processing started for <%s>\n",
 712                 CC->quickroom.QRname);
 713
 714         while (fgets(buf, sizeof buf, fp) != NULL) {
 715                 buf[strlen(buf)-1] = 0;
 716
 717                 extract(instr, buf, 0);
 718                 if (!strcasecmp(instr, "lastsent")) {
 719                         sc.lastsent = extract_long(buf, 1);
 720                 }
 721                 else if (!strcasecmp(instr, "listrecp")) {
 722                         nptr = (struct namelist *)
 723                                 mallok(sizeof(struct namelist));
 724                         nptr->next = sc.listrecps;
 725                         extract(nptr->name, buf, 1);
 726                         sc.listrecps = nptr;
 727                 }
 728                 else if (!strcasecmp(instr, "digestrecp")) {
 729                         nptr = (struct namelist *)
 730                                 mallok(sizeof(struct namelist));
 731                         nptr->next = sc.digestrecps;
 732                         extract(nptr->name, buf, 1);
 733                         sc.digestrecps = nptr;
 734                 }
 735                 else if (!strcasecmp(instr, "ignet_push_share")) {
 736                         nptr = (struct namelist *)
 737                                 mallok(sizeof(struct namelist));
 738                         nptr->next = sc.ignet_push_shares;
 739                         extract(nptr->name, buf, 1);
 740                         sc.ignet_push_shares = nptr;
 741                 }
 742                 else {
 743                         linesize = strlen(buf);
 744                         sc.misc = realloc(sc.misc,
 745                                 (miscsize + linesize + 2) );
 746                         sprintf(&sc.misc[miscsize], "%s\n", buf);
 747                         miscsize = miscsize + linesize + 1;
 748                 }
 749
 750
 751         }
 752         fclose(fp);
 753
 754         /* If there are digest recipients, we have to build a digest */
 755         if (sc.digestrecps != NULL) {
 756                 sc.digestfp = tmpfile();
 757                 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
 758         }
 759
 760         /* Do something useful */
 761         CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL,
 762                 network_spool_msg, &sc);
 763
 764         /* If we wrote a digest, deliver it and then close it */
 765         if (sc.digestfp != NULL) {
 766                 fprintf(sc.digestfp,    " -----------------------------------"
 767                                         "------------------------------------"
 768                                         "-------\n"
 769                                         "You are subscribed to the '%s' "
 770                                         "list.\n",
 771                                         CC->quickroom.QRname
 772                 );
 773                 network_deliver_digest(&sc);    /* deliver and close */
 774         }
 775
 776         /* Now rewrite the config file */
 777         fp = fopen(filename, "w");
 778         if (fp == NULL) {
 779                 lprintf(1, "ERROR: cannot open %s: %s\n",
 780                         filename, strerror(errno));
 781         }
 782         else {
 783                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
 784
 785                 /* Write out the listrecps while freeing from memory at the
 786                  * same time.  Am I clever or what?  :)
 787                  */
 788                 while (sc.listrecps != NULL) {
 789                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
 790                         nptr = sc.listrecps->next;
 791                         phree(sc.listrecps);
 792                         sc.listrecps = nptr;
 793                 }
 794                 /* Do the same for digestrecps */
 795                 while (sc.digestrecps != NULL) {
 796                         fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
 797                         nptr = sc.digestrecps->next;
 798                         phree(sc.digestrecps);
 799                         sc.digestrecps = nptr;
 800                 }
 801                 while (sc.ignet_push_shares != NULL) {
 802                         fprintf(fp, "ignet_push_share|%s\n",
 803                                 sc.ignet_push_shares->name);
 804                         nptr = sc.ignet_push_shares->next;
 805                         phree(sc.ignet_push_shares);
 806                         sc.ignet_push_shares = nptr;
 807                 }
 808                 if (sc.misc != NULL) {
 809                         fwrite(sc.misc, strlen(sc.misc), 1, fp);
 810                 }
 811                 phree(sc.misc);
 812
 813                 fclose(fp);
 814         }
 815         end_critical_section(S_NETCONFIGS);
 816
 817         lprintf(5, "Outbound batch processing finished for <%s>\n",
 818                 CC->quickroom.QRname);
 819 }
 820
 821
 822 /*
 823  * Batch up and send all outbound traffic from the current room
 824  */
 825 void network_queue_room(struct quickroom *qrbuf, void *data) {
 826         struct RoomProcList *ptr;
 827
 828         ptr = (struct RoomProcList *) mallok(sizeof (struct RoomProcList));
 829         if (ptr == NULL) return;
 830
 831         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
 832         ptr->next = rplist;
 833         rplist = ptr;
 834 }
 835
 836
 837 /*
 838  * Learn topology from path fields
 839  */
 840 void network_learn_topology(char *node, char *path) {
 841         char nexthop[SIZ];
 842         struct NetMap *nmptr;
 843
 844         strcpy(nexthop, "");
 845
 846         if (num_tokens(path, '!') < 3) return;
 847         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 848                 if (!strcasecmp(nmptr->nodename, node)) {
 849                         extract_token(nmptr->nexthop, path, 0, '!');
 850                         nmptr->lastcontact = time(NULL);
 851                         return;
 852                 }
 853         }
 854
 855         /* If we got here then it's not in the map, so add it. */
 856         nmptr = (struct NetMap *) mallok(sizeof (struct NetMap));
 857         strcpy(nmptr->nodename, node);
 858         nmptr->lastcontact = time(NULL);
 859         extract_token(nmptr->nexthop, path, 0, '!');
 860         nmptr->next = the_netmap;
 861         the_netmap = nmptr;
 862 }
 863
 864
 865
 866
 867 /*
 868  * Bounce a message back to the sender
 869  */
 870 void network_bounce(struct CtdlMessage *msg, char *reason) {
 871         char *oldpath = NULL;
 872         char buf[SIZ];
 873         char bouncesource[SIZ];
 874         char recipient[SIZ];
 875         struct recptypes *valid = NULL;
 876         char force_room[ROOMNAMELEN];
 877         static int serialnum = 0;
 878         size_t size;
 879
 880         lprintf(9, "entering network_bounce()\n");
 881
 882         if (msg == NULL) return;
 883
 884         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
 885
 886         /*
 887          * Give it a fresh message ID
 888          */
 889         if (msg->cm_fields['I'] != NULL) {
 890                 phree(msg->cm_fields['I']);
 891         }
 892         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
 893                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
 894         msg->cm_fields['I'] = strdoop(buf);
 895
 896         /*
 897          * FIXME ... right now we're just sending a bounce; we really want to
 898          * include the text of the bounced message.
 899          */
 900         if (msg->cm_fields['M'] != NULL) {
 901                 phree(msg->cm_fields['M']);
 902         }
 903         msg->cm_fields['M'] = strdoop(reason);
 904         msg->cm_format_type = 0;
 905
 906         /*
 907          * Turn the message around
 908          */
 909         if (msg->cm_fields['R'] == NULL) {
 910                 phree(msg->cm_fields['R']);
 911         }
 912
 913         if (msg->cm_fields['D'] == NULL) {
 914                 phree(msg->cm_fields['D']);
 915         }
 916
 917         snprintf(recipient, sizeof recipient, "%s@%s",
 918                 msg->cm_fields['A'], msg->cm_fields['N']);
 919
 920         if (msg->cm_fields['A'] == NULL) {
 921                 phree(msg->cm_fields['A']);
 922         }
 923
 924         if (msg->cm_fields['N'] == NULL) {
 925                 phree(msg->cm_fields['N']);
 926         }
 927
 928         msg->cm_fields['A'] = strdoop(BOUNCESOURCE);
 929         msg->cm_fields['N'] = strdoop(config.c_nodename);
 930
 931
 932         /* prepend our node to the path */
 933         if (msg->cm_fields['P'] != NULL) {
 934                 oldpath = msg->cm_fields['P'];
 935                 msg->cm_fields['P'] = NULL;
 936         }
 937         else {
 938                 oldpath = strdoop("unknown_user");
 939         }
 940         size = strlen(oldpath) + SIZ;
 941         msg->cm_fields['P'] = mallok(size);
 942         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
 943         phree(oldpath);
 944
 945         /* Now submit the message */
 946         valid = validate_recipients(recipient);
 947         if (valid != NULL) if (valid->num_error > 0) {
 948                 phree(valid);
 949                 valid = NULL;
 950         }
 951         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 952                 strcpy(force_room, config.c_aideroom);
 953         }
 954         else {
 955                 strcpy(force_room, "");
 956         }
 957         if ( (valid == NULL) && (strlen(force_room) == 0) ) {
 958                 strcpy(force_room, config.c_aideroom);
 959         }
 960         CtdlSubmitMsg(msg, valid, force_room);
 961
 962         /* Clean up */
 963         if (valid != NULL) phree(valid);
 964         CtdlFreeMessage(msg);
 965         lprintf(9, "leaving network_bounce()\n");
 966 }
 967
 968
 969
 970
 971 /*
 972  * Process a buffer containing a single message from a single file
 973  * from the inbound queue
 974  */
 975 void network_process_buffer(char *buffer, long size) {
 976         struct CtdlMessage *msg;
 977         long pos;
 978         int field;
 979         struct recptypes *recp = NULL;
 980         char target_room[ROOMNAMELEN];
 981         struct ser_ret sermsg;
 982         char *oldpath = NULL;
 983         char filename[SIZ];
 984         FILE *fp;
 985         char buf[SIZ];
 986
 987         /* Set default target room to trash */
 988         strcpy(target_room, TWITROOM);
 989
 990         /* Load the message into memory */
 991         msg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
 992         memset(msg, 0, sizeof(struct CtdlMessage));
 993         msg->cm_magic = CTDLMESSAGE_MAGIC;
 994         msg->cm_anon_type = buffer[1];
 995         msg->cm_format_type = buffer[2];
 996
 997         for (pos = 3; pos < size; ++pos) {
 998                 field = buffer[pos];
 999                 msg->cm_fields[field] = strdoop(&buffer[pos+1]);
1000                 pos = pos + strlen(&buffer[(int)pos]);
1001         }
1002
1003         /* Check for message routing */
1004         if (msg->cm_fields['D'] != NULL) {
1005                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1006
1007                         /* route the message */
1008                         if (is_valid_node(NULL, NULL,
1009                            msg->cm_fields['D']) == 0) {
1010
1011                                 /* prepend our node to the path */
1012                                 if (msg->cm_fields['P'] != NULL) {
1013                                         oldpath = msg->cm_fields['P'];
1014                                         msg->cm_fields['P'] = NULL;
1015                                 }
1016                                 else {
1017                                         oldpath = strdoop("unknown_user");
1018                                 }
1019                                 size = strlen(oldpath) + SIZ;
1020                                 msg->cm_fields['P'] = mallok(size);
1021                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1022                                         config.c_nodename, oldpath);
1023                                 phree(oldpath);
1024
1025                                 /* serialize the message */
1026                                 serialize_message(&sermsg, msg);
1027
1028                                 /* now send it */
1029                                 snprintf(filename, sizeof filename,
1030                                         "./network/spoolout/%s",
1031                                         msg->cm_fields['D']);
1032                                 fp = fopen(filename, "ab");
1033                                 if (fp != NULL) {
1034                                         fwrite(sermsg.ser,
1035                                                 sermsg.len, 1, fp);
1036                                         fclose(fp);
1037                                 }
1038                                 phree(sermsg.ser);
1039                                 CtdlFreeMessage(msg);
1040                                 return;
1041                         }
1042
1043                         else {  /* invalid destination node name */
1044
1045                                 network_bounce(msg,
1046 "A message you sent could not be delivered due to an invalid destination node"
1047 " name.  Please check the address and try sending the message again.\n");
1048                                 msg = NULL;
1049                                 return;
1050
1051                         }
1052                 }
1053         }
1054
1055         /*
1056          * Check to see if we already have a copy of this message
1057          */
1058         if (network_usetable(msg) != 0) {
1059                 snprintf(buf, sizeof buf,
1060                         "Loopzapper rejected message <%s> "
1061                         "from <%s> in <%s> @ <%s>\n",
1062                         ((msg->cm_fields['I']!=NULL)?(msg->cm_fields['I']):""),
1063                         ((msg->cm_fields['A']!=NULL)?(msg->cm_fields['A']):""),
1064                         ((msg->cm_fields['O']!=NULL)?(msg->cm_fields['O']):""),
1065                         ((msg->cm_fields['N']!=NULL)?(msg->cm_fields['N']):"")
1066                 );
1067                 aide_message(buf);
1068                 CtdlFreeMessage(msg);
1069                 msg = NULL;
1070                 return;
1071         }
1072
1073         /* Learn network topology from the path */
1074         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1075                 network_learn_topology(msg->cm_fields['N'],
1076                                         msg->cm_fields['P']);
1077         }
1078
1079         /* Does it have a recipient?  If so, validate it... */
1080         if (msg->cm_fields['R'] != NULL) {
1081                 recp = validate_recipients(msg->cm_fields['R']);
1082                 if (recp != NULL) if (recp->num_error > 0) {
1083                         network_bounce(msg,
1084 "A message you sent could not be delivered due to an invalid address.\n"
1085 "Please check the address and try sending the message again.\n");
1086                         msg = NULL;
1087                         phree(recp);
1088                         return;
1089                 }
1090                 strcpy(target_room, "");        /* no target room if mail */
1091         }
1092
1093         else if (msg->cm_fields['C'] != NULL) {
1094                 safestrncpy(target_room,
1095                         msg->cm_fields['C'],
1096                         sizeof target_room);
1097         }
1098
1099         else if (msg->cm_fields['O'] != NULL) {
1100                 safestrncpy(target_room,
1101                         msg->cm_fields['O'],
1102                         sizeof target_room);
1103         }
1104
1105         /* Strip out fields that are only relevant during transit */
1106         if (msg->cm_fields['D'] != NULL) {
1107                 phree(msg->cm_fields['D']);
1108                 msg->cm_fields['D'] = NULL;
1109         }
1110         if (msg->cm_fields['C'] != NULL) {
1111                 phree(msg->cm_fields['C']);
1112                 msg->cm_fields['C'] = NULL;
1113         }
1114
1115         /* save the message into a room */
1116         if (PerformNetprocHooks(msg, target_room) == 0) {
1117                 msg->cm_flags = CM_SKIP_HOOKS;
1118                 CtdlSubmitMsg(msg, recp, target_room);
1119         }
1120         CtdlFreeMessage(msg);
1121         phree(recp);
1122 }
1123
1124
1125 /*
1126  * Process a single message from a single file from the inbound queue
1127  */
1128 void network_process_message(FILE *fp, long msgstart, long msgend) {
1129         long hold_pos;
1130         long size;
1131         char *buffer;
1132
1133         hold_pos = ftell(fp);
1134         size = msgend - msgstart + 1;
1135         buffer = mallok(size);
1136         if (buffer != NULL) {
1137                 fseek(fp, msgstart, SEEK_SET);
1138                 fread(buffer, size, 1, fp);
1139                 network_process_buffer(buffer, size);
1140                 phree(buffer);
1141         }
1142
1143         fseek(fp, hold_pos, SEEK_SET);
1144 }
1145
1146
1147 /*
1148  * Process a single file from the inbound queue
1149  */
1150 void network_process_file(char *filename) {
1151         FILE *fp;
1152         long msgstart = (-1L);
1153         long msgend = (-1L);
1154         long msgcur = 0L;
1155         int ch;
1156
1157         lprintf(7, "network: processing <%s>\n", filename);
1158
1159         fp = fopen(filename, "rb");
1160         if (fp == NULL) {
1161                 lprintf(5, "Error opening %s: %s\n",
1162                         filename, strerror(errno));
1163                 return;
1164         }
1165
1166         /* Look for messages in the data stream and break them out */
1167         while (ch = getc(fp), ch >= 0) {
1168
1169                 if (ch == 255) {
1170                         if (msgstart >= 0L) {
1171                                 msgend = msgcur - 1;
1172                                 network_process_message(fp, msgstart, msgend);
1173                         }
1174                         msgstart = msgcur;
1175                 }
1176
1177                 ++msgcur;
1178         }
1179
1180         msgend = msgcur - 1;
1181         if (msgstart >= 0L) {
1182                 network_process_message(fp, msgstart, msgend);
1183         }
1184
1185         fclose(fp);
1186         unlink(filename);
1187 }
1188
1189
1190 /*
1191  * Process anything in the inbound queue
1192  */
1193 void network_do_spoolin(void) {
1194         DIR *dp;
1195         struct dirent *d;
1196         char filename[SIZ];
1197
1198         dp = opendir("./network/spoolin");
1199         if (dp == NULL) return;
1200
1201         while (d = readdir(dp), d != NULL) {
1202                 snprintf(filename, sizeof filename, "./network/spoolin/%s", d->d_name);
1203                 network_process_file(filename);
1204         }
1205
1206
1207         closedir(dp);
1208 }
1209
1210
1211
1212
1213
1214 /*
1215  * receive network spool from the remote system
1216  */
1217 void receive_spool(int sock, char *remote_nodename) {
1218         long download_len;
1219         long bytes_received;
1220         char buf[SIZ];
1221         static char pbuf[IGNET_PACKET_SIZE];
1222         char tempfilename[PATH_MAX];
1223         long plen;
1224         FILE *fp;
1225
1226         strcpy(tempfilename, tmpnam(NULL));
1227         if (sock_puts(sock, "NDOP") < 0) return;
1228         if (sock_gets(sock, buf) < 0) return;
1229         lprintf(9, "<%s\n", buf);
1230         if (buf[0] != '2') {
1231                 return;
1232         }
1233         download_len = extract_long(&buf[4], 0);
1234
1235         bytes_received = 0L;
1236         fp = fopen(tempfilename, "w");
1237         if (fp == NULL) {
1238                 lprintf(9, "cannot open download file locally: %s\n",
1239                         strerror(errno));
1240                 return;
1241         }
1242
1243         while (bytes_received < download_len) {
1244                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1245                         bytes_received,
1246                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1247                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1248                 if (sock_puts(sock, buf) < 0) {
1249                         fclose(fp);
1250                         unlink(tempfilename);
1251                         return;
1252                 }
1253                 if (sock_gets(sock, buf) < 0) {
1254                         fclose(fp);
1255                         unlink(tempfilename);
1256                         return;
1257                 }
1258                 if (buf[0] == '6') {
1259                         plen = extract_long(&buf[4], 0);
1260                         if (sock_read(sock, pbuf, plen) < 0) {
1261                                 fclose(fp);
1262                                 unlink(tempfilename);
1263                                 return;
1264                         }
1265                         fwrite((char *) pbuf, plen, 1, fp);
1266                         bytes_received = bytes_received + plen;
1267                 }
1268         }
1269
1270         fclose(fp);
1271         if (sock_puts(sock, "CLOS") < 0) {
1272                 unlink(tempfilename);
1273                 return;
1274         }
1275         if (sock_gets(sock, buf) < 0) {
1276                 unlink(tempfilename);
1277                 return;
1278         }
1279         lprintf(9, "%s\n", buf);
1280         snprintf(buf, sizeof buf, "mv %s ./network/spoolin/%s.%ld",
1281                 tempfilename, remote_nodename, (long) getpid());
1282         system(buf);
1283 }
1284
1285
1286
1287 /*
1288  * transmit network spool to the remote system
1289  */
1290 void transmit_spool(int sock, char *remote_nodename)
1291 {
1292         char buf[SIZ];
1293         char pbuf[4096];
1294         long plen;
1295         long bytes_to_write, thisblock;
1296         int fd;
1297         char sfname[128];
1298
1299         if (sock_puts(sock, "NUOP") < 0) return;
1300         if (sock_gets(sock, buf) < 0) return;
1301         lprintf(9, "<%s\n", buf);
1302         if (buf[0] != '2') {
1303                 return;
1304         }
1305
1306         snprintf(sfname, sizeof sfname, "./network/spoolout/%s", remote_nodename);
1307         fd = open(sfname, O_RDONLY);
1308         if (fd < 0) {
1309                 if (errno == ENOENT) {
1310                         lprintf(9, "Nothing to send.\n");
1311                 } else {
1312                         lprintf(5, "cannot open upload file locally: %s\n",
1313                                 strerror(errno));
1314                 }
1315                 return;
1316         }
1317         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1318                 bytes_to_write = plen;
1319                 while (bytes_to_write > 0L) {
1320                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1321                         if (sock_puts(sock, buf) < 0) {
1322                                 close(fd);
1323                                 return;
1324                         }
1325                         if (sock_gets(sock, buf) < 0) {
1326                                 close(fd);
1327                                 return;
1328                         }
1329                         thisblock = atol(&buf[4]);
1330                         if (buf[0] == '7') {
1331                                 if (sock_write(sock, pbuf,
1332                                    (int) thisblock) < 0) {
1333                                         close(fd);
1334                                         return;
1335                                 }
1336                                 bytes_to_write = bytes_to_write - thisblock;
1337                         } else {
1338                                 goto ABORTUPL;
1339                         }
1340                 }
1341         }
1342
1343 ABORTUPL:
1344         close(fd);
1345         if (sock_puts(sock, "UCLS 1") < 0) return;
1346         if (sock_gets(sock, buf) < 0) return;
1347         lprintf(9, "<%s\n", buf);
1348         if (buf[0] == '2') {
1349                 unlink(sfname);
1350         }
1351 }
1352
1353
1354
1355 /*
1356  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1357  */
1358 void network_poll_node(char *node, char *secret, char *host, char *port) {
1359         int sock;
1360         char buf[SIZ];
1361
1362         if (network_talking_to(node, NTT_CHECK)) return;
1363         network_talking_to(node, NTT_ADD);
1364         lprintf(5, "Polling node <%s> at %s:%s\n", node, host, port);
1365
1366         sock = sock_connect(host, port, "tcp");
1367         if (sock < 0) {
1368                 lprintf(7, "Could not connect: %s\n", strerror(errno));
1369                 network_talking_to(node, NTT_REMOVE);
1370                 return;
1371         }
1372
1373         lprintf(9, "Connected!\n");
1374
1375         /* Read the server greeting */
1376         if (sock_gets(sock, buf) < 0) goto bail;
1377         lprintf(9, ">%s\n", buf);
1378
1379         /* Identify ourselves */
1380         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1381         lprintf(9, "<%s\n", buf);
1382         if (sock_puts(sock, buf) <0) goto bail;
1383         if (sock_gets(sock, buf) < 0) goto bail;
1384         lprintf(9, ">%s\n", buf);
1385         if (buf[0] != '2') goto bail;
1386
1387         /* At this point we are authenticated. */
1388         receive_spool(sock, node);
1389         transmit_spool(sock, node);
1390
1391         sock_puts(sock, "QUIT");
1392 bail:   sock_close(sock);
1393         network_talking_to(node, NTT_REMOVE);
1394 }
1395
1396
1397
1398 /*
1399  * Poll other Citadel nodes and transfer inbound/outbound network data.
1400  */
1401 void network_poll_other_citadel_nodes(void) {
1402         char *ignetcfg = NULL;
1403         int i;
1404         char linebuf[SIZ];
1405         char node[SIZ];
1406         char host[SIZ];
1407         char port[SIZ];
1408         char secret[SIZ];
1409
1410         ignetcfg = CtdlGetSysConfig(IGNETCFG);
1411         if (ignetcfg == NULL) return;   /* no nodes defined */
1412
1413         /* Use the string tokenizer to grab one line at a time */
1414         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
1415                 extract_token(linebuf, ignetcfg, i, '\n');
1416                 extract(node, linebuf, 0);
1417                 extract(secret, linebuf, 1);
1418                 extract(host, linebuf, 2);
1419                 extract(port, linebuf, 3);
1420                 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1421                    && (strlen(host) > 0) && strlen(port) > 0) {
1422                         network_poll_node(node, secret, host, port);
1423                 }
1424         }
1425
1426         phree(ignetcfg);
1427 }
1428
1429
1430
1431
1432
1433
1434
1435 /*
1436  * network_do_queue()
1437  *
1438  * Run through the rooms doing various types of network stuff.
1439  */
1440 void network_do_queue(void) {
1441         static int doing_queue = 0;
1442         static time_t last_run = 0L;
1443         struct RoomProcList *ptr;
1444
1445         /*
1446          * Run no more frequently than once every n seconds
1447          */
1448         if ( (time(NULL) - last_run) < config.c_net_freq ) return;
1449
1450         /*
1451          * This is a simple concurrency check to make sure only one queue run
1452          * is done at a time.  We could do this with a mutex, but since we
1453          * don't really require extremely fine granularity here, we'll do it
1454          * with a static variable instead.
1455          */
1456         if (doing_queue) return;
1457         doing_queue = 1;
1458         last_run = time(NULL);
1459
1460         /*
1461          * Poll other Citadel nodes.
1462          */
1463         network_poll_other_citadel_nodes();
1464
1465         /*
1466          * Load the network map and filter list into memory.
1467          */
1468         read_network_map();
1469         filterlist = load_filter_list();
1470
1471         /*
1472          * Go ahead and run the queue
1473          */
1474         lprintf(7, "network: loading outbound queue\n");
1475         ForEachRoom(network_queue_room, NULL);
1476
1477         lprintf(7, "network: running outbound queue\n");
1478         while (rplist != NULL) {
1479                 network_spoolout_room(rplist->name);
1480                 ptr = rplist;
1481                 rplist = rplist->next;
1482                 phree(ptr);
1483         }
1484
1485         lprintf(7, "network: processing inbound queue\n");
1486         network_do_spoolin();
1487
1488         /* Save the network map back to disk */
1489         write_network_map();
1490
1491         /* Free the filter list in memory */
1492         free_filter_list(filterlist);
1493         filterlist = NULL;
1494
1495         lprintf(7, "network: queue run completed\n");
1496         doing_queue = 0;
1497 }
1498
1499
1500 /*
1501  * cmd_netp() - authenticate to the server as another Citadel node polling
1502  *              for network traffic
1503  */
1504 void cmd_netp(char *cmdbuf)
1505 {
1506         char node[SIZ];
1507         char pass[SIZ];
1508
1509         char secret[SIZ];
1510         char nexthop[SIZ];
1511
1512         extract(node, cmdbuf, 0);
1513         extract(pass, cmdbuf, 1);
1514
1515         if (is_valid_node(nexthop, secret, node) != 0) {
1516                 cprintf("%d authentication failed\n", ERROR);
1517                 return;
1518         }
1519
1520         if (strcasecmp(pass, secret)) {
1521                 cprintf("%d authentication failed\n", ERROR);
1522                 return;
1523         }
1524
1525         if (network_talking_to(node, NTT_CHECK)) {
1526                 cprintf("%d Already talking to %s right now\n", ERROR, node);
1527                 return;
1528         }
1529
1530         safestrncpy(CC->net_node, node, sizeof CC->net_node);
1531         network_talking_to(node, NTT_ADD);
1532         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
1533                 CC->net_node);
1534 }
1535
1536
1537
1538
1539
1540 /*
1541  * Module entry point
1542  */
1543 char *Dynamic_Module_Init(void)
1544 {
1545         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1546         CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1547         CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1548         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
1549         return "$Id$";
1550 }