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