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