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; we have a mutex that keeps it safe.
  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, ctdl_netcfg_dir);
 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, ctdl_netcfg_dir);
 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         msg = CtdlFetchMessage(msgnum, 1);
 765         if (msg != NULL) {
 766                 size_t newpath_len;
 767
 768                 /* Prepend our node name to the Path field whenever
 769                  * sending a message to another IGnet node
 770                  */
 771                 if (msg->cm_fields['P'] == NULL) {
 772                         msg->cm_fields['P'] = strdup("username");
 773                 }
 774                 newpath_len = strlen(msg->cm_fields['P']) +
 775                          strlen(config.c_nodename) + 2;
 776                 newpath = malloc(newpath_len);
 777                 snprintf(newpath, newpath_len, "%s!%s",
 778                          config.c_nodename, msg->cm_fields['P']);
 779                 free(msg->cm_fields['P']);
 780                 msg->cm_fields['P'] = newpath;
 781
 782                 /*
 783                  * Determine if this message is set to be deleted
 784                  * after sending out on the network
 785                  */
 786                 if (msg->cm_fields['S'] != NULL) {
 787                         if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
 788                                 delete_after_send = 1;
 789                         }
 790                 }
 791
 792                 /* Now send it to every node */
 793                 if (sc->ignet_push_shares != NULL)
 794                   for (mptr = sc->ignet_push_shares; mptr != NULL;
 795                     mptr = mptr->next) {
 796
 797                         send = 1;
 798
 799                         /* Check for valid node name */
 800                         if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
 801                                 lprintf(CTDL_ERR, "Invalid node <%s>\n",
 802                                         mptr->remote_nodename);
 803                                 send = 0;
 804                         }
 805
 806                         /* Check for split horizon */
 807                         lprintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
 808                         bang = num_tokens(msg->cm_fields['P'], '!');
 809                         if (bang > 1) for (i=0; i<(bang-1); ++i) {
 810                                 extract_token(buf, msg->cm_fields['P'],
 811                                         i, '!', sizeof buf);
 812                                 if (!strcasecmp(buf, mptr->remote_nodename)) {
 813                                         send = 0;
 814                                 }
 815                         }
 816
 817                         /* Send the message */
 818                         if (send == 1) {
 819
 820                                 /*
 821                                  * Force the message to appear in the correct room
 822                                  * on the far end by setting the C field correctly
 823                                  */
 824                                 if (msg->cm_fields['C'] != NULL) {
 825                                         free(msg->cm_fields['C']);
 826                                 }
 827                                 if (strlen(mptr->remote_roomname) > 0) {
 828                                         msg->cm_fields['C'] = strdup(mptr->remote_roomname);
 829                                 }
 830                                 else {
 831                                         msg->cm_fields['C'] = strdup(CC->room.QRname);
 832                                 }
 833
 834                                 /* serialize it for transmission */
 835                                 serialize_message(&sermsg, msg);
 836                                 if (sermsg.len > 0) {
 837
 838                                         /* write it to the spool file */
 839                                         snprintf(filename, sizeof filename,"%s/%s",
 840                                                         ctdl_netout_dir,
 841                                                         mptr->remote_nodename);
 842                                         lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
 843                                         fp = fopen(filename, "ab");
 844                                         if (fp != NULL) {
 845                                                 fwrite(sermsg.ser,
 846                                                         sermsg.len, 1, fp);
 847                                                 fclose(fp);
 848                                         }
 849                                         else {
 850                                                 lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
 851                                         }
 852
 853                                         /* free the serialized version */
 854                                         free(sermsg.ser);
 855                                 }
 856
 857                         }
 858                 }
 859                 CtdlFreeMessage(msg);
 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, 1, "", 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         /*
 893          * If the room doesn't exist, don't try to perform its networking tasks.
 894          * Normally this should never happen, but once in a while maybe a room gets
 895          * queued for networking and then deleted before it can happen.
 896          */
 897         if (getroom(&CC->room, room_to_spool) != 0) {
 898                 lprintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
 899                 return;
 900         }
 901
 902         memset(&sc, 0, sizeof(struct SpoolControl));
 903         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 904
 905         begin_critical_section(S_NETCONFIGS);
 906
 907         /* Only do net processing for rooms that have netconfigs */
 908         fp = fopen(filename, "r");
 909         if (fp == NULL) {
 910                 end_critical_section(S_NETCONFIGS);
 911                 return;
 912         }
 913
 914         lprintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
 915
 916         while (fgets(buf, sizeof buf, fp) != NULL) {
 917                 buf[strlen(buf)-1] = 0;
 918
 919                 extract_token(instr, buf, 0, '|', sizeof instr);
 920                 if (!strcasecmp(instr, "lastsent")) {
 921                         sc.lastsent = extract_long(buf, 1);
 922                 }
 923                 else if (!strcasecmp(instr, "listrecp")) {
 924                         nptr = (struct namelist *)
 925                                 malloc(sizeof(struct namelist));
 926                         nptr->next = sc.listrecps;
 927                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 928                         sc.listrecps = nptr;
 929                 }
 930                 else if (!strcasecmp(instr, "participate")) {
 931                         nptr = (struct namelist *)
 932                                 malloc(sizeof(struct namelist));
 933                         nptr->next = sc.participates;
 934                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 935                         sc.participates = nptr;
 936                 }
 937                 else if (!strcasecmp(instr, "digestrecp")) {
 938                         nptr = (struct namelist *)
 939                                 malloc(sizeof(struct namelist));
 940                         nptr->next = sc.digestrecps;
 941                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 942                         sc.digestrecps = nptr;
 943                 }
 944                 else if (!strcasecmp(instr, "ignet_push_share")) {
 945                         /* by checking each node's validity, we automatically
 946                          * purge nodes which do not exist from room network
 947                          * configurations at this time.
 948                          */
 949                         extract_token(nodename, buf, 1, '|', sizeof nodename);
 950                         extract_token(roomname, buf, 2, '|', sizeof roomname);
 951                         strcpy(nexthop, "xxx");
 952                         if (is_valid_node(nexthop, NULL, nodename) == 0) {
 953                                 if (strlen(nexthop) == 0) {
 954                                         mptr = (struct maplist *)
 955                                                 malloc(sizeof(struct maplist));
 956                                         mptr->next = sc.ignet_push_shares;
 957                                         strcpy(mptr->remote_nodename, nodename);
 958                                         strcpy(mptr->remote_roomname, roomname);
 959                                         sc.ignet_push_shares = mptr;
 960                                 }
 961                         }
 962                 }
 963                 else {
 964                         /* Preserve 'other' lines ... *unless* they happen to
 965                          * be subscribe/unsubscribe pendings with expired
 966                          * timestamps.
 967                          */
 968                         skipthisline = 0;
 969                         if (!strncasecmp(buf, "subpending|", 11)) {
 970                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 971                                         skipthisline = 1;
 972                                 }
 973                         }
 974                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 975                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 976                                         skipthisline = 1;
 977                                 }
 978                         }
 979
 980                         if (skipthisline == 0) {
 981                                 linesize = strlen(buf);
 982                                 sc.misc = realloc(sc.misc,
 983                                         (miscsize + linesize + 2) );
 984                                 sprintf(&sc.misc[miscsize], "%s\n", buf);
 985                                 miscsize = miscsize + linesize + 1;
 986                         }
 987                 }
 988
 989
 990         }
 991         fclose(fp);
 992
 993         /* If there are digest recipients, we have to build a digest */
 994         if (sc.digestrecps != NULL) {
 995                 sc.digestfp = tmpfile();
 996                 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
 997         }
 998
 999         /* Do something useful */
1000         CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL, NULL,
1001                 network_spool_msg, &sc);
1002
1003         /* If we wrote a digest, deliver it and then close it */
1004         snprintf(buf, sizeof buf, "room_%s@%s",
1005                 CC->room.QRname, config.c_fqdn);
1006         for (i=0; i<strlen(buf); ++i) {
1007                 buf[i] = tolower(buf[i]);
1008                 if (isspace(buf[i])) buf[i] = '_';
1009         }
1010         if (sc.digestfp != NULL) {
1011                 fprintf(sc.digestfp,    " -----------------------------------"
1012                                         "------------------------------------"
1013                                         "-------\n"
1014                                         "You are subscribed to the '%s' "
1015                                         "list.\n"
1016                                         "To post to the list: %s\n",
1017                                         CC->room.QRname, buf
1018                 );
1019                 network_deliver_digest(&sc);    /* deliver and close */
1020         }
1021
1022         /* Now rewrite the config file */
1023         fp = fopen(filename, "w");
1024         if (fp == NULL) {
1025                 lprintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
1026                         filename, strerror(errno));
1027         }
1028         else {
1029                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
1030
1031                 /* Write out the listrecps while freeing from memory at the
1032                  * same time.  Am I clever or what?  :)
1033                  */
1034                 while (sc.listrecps != NULL) {
1035                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
1036                         nptr = sc.listrecps->next;
1037                         free(sc.listrecps);
1038                         sc.listrecps = nptr;
1039                 }
1040                 /* Do the same for digestrecps */
1041                 while (sc.digestrecps != NULL) {
1042                         fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
1043                         nptr = sc.digestrecps->next;
1044                         free(sc.digestrecps);
1045                         sc.digestrecps = nptr;
1046                 }
1047                 /* Do the same for participates */
1048                 while (sc.participates != NULL) {
1049                         fprintf(fp, "participate|%s\n", sc.participates->name);
1050                         nptr = sc.participates->next;
1051                         free(sc.participates);
1052                         sc.participates = nptr;
1053                 }
1054                 while (sc.ignet_push_shares != NULL) {
1055                         /* by checking each node's validity, we automatically
1056                          * purge nodes which do not exist from room network
1057                          * configurations at this time.
1058                          */
1059                         if (is_valid_node(NULL, NULL, sc.ignet_push_shares->remote_nodename) == 0) {
1060                         }
1061                         fprintf(fp, "ignet_push_share|%s",
1062                                 sc.ignet_push_shares->remote_nodename);
1063                         if (strlen(sc.ignet_push_shares->remote_roomname) > 0) {
1064                                 fprintf(fp, "|%s", sc.ignet_push_shares->remote_roomname);
1065                         }
1066                         fprintf(fp, "\n");
1067                         mptr = sc.ignet_push_shares->next;
1068                         free(sc.ignet_push_shares);
1069                         sc.ignet_push_shares = mptr;
1070                 }
1071                 if (sc.misc != NULL) {
1072                         fwrite(sc.misc, strlen(sc.misc), 1, fp);
1073                 }
1074                 free(sc.misc);
1075
1076                 fclose(fp);
1077         }
1078         end_critical_section(S_NETCONFIGS);
1079 }
1080
1081
1082
1083 /*
1084  * Send the *entire* contents of the current room to one specific network node,
1085  * ignoring anything we know about which messages have already undergone
1086  * network processing.  This can be used to bring a new node into sync.
1087  */
1088 int network_sync_to(char *target_node) {
1089         struct SpoolControl sc;
1090         int num_spooled = 0;
1091         int found_node = 0;
1092         char buf[256];
1093         char sc_type[256];
1094         char sc_node[256];
1095         char sc_room[256];
1096         char filename[256];
1097         FILE *fp;
1098
1099         /* Grab the configuration line we're looking for */
1100         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1101         begin_critical_section(S_NETCONFIGS);
1102         fp = fopen(filename, "r");
1103         if (fp == NULL) {
1104                 end_critical_section(S_NETCONFIGS);
1105                 return(-1);
1106         }
1107         while (fgets(buf, sizeof buf, fp) != NULL) {
1108                 buf[strlen(buf)-1] = 0;
1109                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1110                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1111                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1112                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1113                    && (!strcasecmp(sc_node, target_node)) ) {
1114                         found_node = 1;
1115
1116                         /* Concise syntax because we don't need a full linked-list */
1117                         memset(&sc, 0, sizeof(struct SpoolControl));
1118                         sc.ignet_push_shares = (struct maplist *)
1119                                 malloc(sizeof(struct maplist));
1120                         sc.ignet_push_shares->next = NULL;
1121                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1122                                 sc_node,
1123                                 sizeof sc.ignet_push_shares->remote_nodename);
1124                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1125                                 sc_room,
1126                                 sizeof sc.ignet_push_shares->remote_roomname);
1127                 }
1128         }
1129         fclose(fp);
1130         end_critical_section(S_NETCONFIGS);
1131
1132         if (!found_node) return(-1);
1133
1134         /* Send ALL messages */
1135         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1136                 network_spool_msg, &sc);
1137
1138         /* Concise cleanup because we know there's only one node in the sc */
1139         free(sc.ignet_push_shares);
1140
1141         lprintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1142                 num_spooled, target_node);
1143         return(num_spooled);
1144 }
1145
1146
1147 /*
1148  * Implements the NSYN command
1149  */
1150 void cmd_nsyn(char *argbuf) {
1151         int num_spooled;
1152         char target_node[256];
1153
1154         if (CtdlAccessCheck(ac_aide)) return;
1155
1156         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1157         num_spooled = network_sync_to(target_node);
1158         if (num_spooled >= 0) {
1159                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1160         }
1161         else {
1162                 cprintf("%d No such room/node share exists.\n",
1163                         ERROR + ROOM_NOT_FOUND);
1164         }
1165 }
1166
1167
1168
1169 /*
1170  * Batch up and send all outbound traffic from the current room
1171  */
1172 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1173         struct RoomProcList *ptr;
1174
1175         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1176         if (ptr == NULL) return;
1177
1178         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1179         begin_critical_section(S_RPLIST);
1180         ptr->next = rplist;
1181         rplist = ptr;
1182         end_critical_section(S_RPLIST);
1183 }
1184
1185
1186 /*
1187  * Learn topology from path fields
1188  */
1189 void network_learn_topology(char *node, char *path) {
1190         char nexthop[256];
1191         struct NetMap *nmptr;
1192
1193         strcpy(nexthop, "");
1194
1195         if (num_tokens(path, '!') < 3) return;
1196         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1197                 if (!strcasecmp(nmptr->nodename, node)) {
1198                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1199                         nmptr->lastcontact = time(NULL);
1200                         ++netmap_changed;
1201                         return;
1202                 }
1203         }
1204
1205         /* If we got here then it's not in the map, so add it. */
1206         nmptr = (struct NetMap *) malloc(sizeof (struct NetMap));
1207         strcpy(nmptr->nodename, node);
1208         nmptr->lastcontact = time(NULL);
1209         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1210         nmptr->next = the_netmap;
1211         the_netmap = nmptr;
1212         ++netmap_changed;
1213 }
1214
1215
1216
1217
1218 /*
1219  * Bounce a message back to the sender
1220  */
1221 void network_bounce(struct CtdlMessage *msg, char *reason) {
1222         char *oldpath = NULL;
1223         char buf[SIZ];
1224         char bouncesource[SIZ];
1225         char recipient[SIZ];
1226         struct recptypes *valid = NULL;
1227         char force_room[ROOMNAMELEN];
1228         static int serialnum = 0;
1229         size_t size;
1230
1231         lprintf(CTDL_DEBUG, "entering network_bounce()\n");
1232
1233         if (msg == NULL) return;
1234
1235         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1236
1237         /*
1238          * Give it a fresh message ID
1239          */
1240         if (msg->cm_fields['I'] != NULL) {
1241                 free(msg->cm_fields['I']);
1242         }
1243         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1244                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1245         msg->cm_fields['I'] = strdup(buf);
1246
1247         /*
1248          * FIXME ... right now we're just sending a bounce; we really want to
1249          * include the text of the bounced message.
1250          */
1251         if (msg->cm_fields['M'] != NULL) {
1252                 free(msg->cm_fields['M']);
1253         }
1254         msg->cm_fields['M'] = strdup(reason);
1255         msg->cm_format_type = 0;
1256
1257         /*
1258          * Turn the message around
1259          */
1260         if (msg->cm_fields['R'] == NULL) {
1261                 free(msg->cm_fields['R']);
1262         }
1263
1264         if (msg->cm_fields['D'] == NULL) {
1265                 free(msg->cm_fields['D']);
1266         }
1267
1268         snprintf(recipient, sizeof recipient, "%s@%s",
1269                 msg->cm_fields['A'], msg->cm_fields['N']);
1270
1271         if (msg->cm_fields['A'] == NULL) {
1272                 free(msg->cm_fields['A']);
1273         }
1274
1275         if (msg->cm_fields['N'] == NULL) {
1276                 free(msg->cm_fields['N']);
1277         }
1278
1279         if (msg->cm_fields['U'] == NULL) {
1280                 free(msg->cm_fields['U']);
1281         }
1282
1283         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1284         msg->cm_fields['N'] = strdup(config.c_nodename);
1285         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1286
1287         /* prepend our node to the path */
1288         if (msg->cm_fields['P'] != NULL) {
1289                 oldpath = msg->cm_fields['P'];
1290                 msg->cm_fields['P'] = NULL;
1291         }
1292         else {
1293                 oldpath = strdup("unknown_user");
1294         }
1295         size = strlen(oldpath) + SIZ;
1296         msg->cm_fields['P'] = malloc(size);
1297         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1298         free(oldpath);
1299
1300         /* Now submit the message */
1301         valid = validate_recipients(recipient);
1302         if (valid != NULL) if (valid->num_error != 0) {
1303                 free(valid);
1304                 valid = NULL;
1305         }
1306         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1307                 strcpy(force_room, config.c_aideroom);
1308         }
1309         else {
1310                 strcpy(force_room, "");
1311         }
1312         if ( (valid == NULL) && (strlen(force_room) == 0) ) {
1313                 strcpy(force_room, config.c_aideroom);
1314         }
1315         CtdlSubmitMsg(msg, valid, force_room);
1316
1317         /* Clean up */
1318         if (valid != NULL) free(valid);
1319         CtdlFreeMessage(msg);
1320         lprintf(CTDL_DEBUG, "leaving network_bounce()\n");
1321 }
1322
1323
1324
1325
1326 /*
1327  * Process a buffer containing a single message from a single file
1328  * from the inbound queue
1329  */
1330 void network_process_buffer(char *buffer, long size) {
1331         struct CtdlMessage *msg;
1332         long pos;
1333         int field;
1334         struct recptypes *recp = NULL;
1335         char target_room[ROOMNAMELEN];
1336         struct ser_ret sermsg;
1337         char *oldpath = NULL;
1338         char filename[SIZ];
1339         FILE *fp;
1340         char nexthop[SIZ];
1341         unsigned char firstbyte;
1342         unsigned char lastbyte;
1343
1344         /* Validate just a little bit.  First byte should be FF and
1345          * last byte should be 00.
1346          */
1347         memcpy(&firstbyte, &buffer[0], 1);
1348         memcpy(&lastbyte, &buffer[size-1], 1);
1349         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1350                 lprintf(CTDL_ERR, "Corrupt message!  Ignoring.\n");
1351                 return;
1352         }
1353
1354         /* Set default target room to trash */
1355         strcpy(target_room, TWITROOM);
1356
1357         /* Load the message into memory */
1358         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1359         memset(msg, 0, sizeof(struct CtdlMessage));
1360         msg->cm_magic = CTDLMESSAGE_MAGIC;
1361         msg->cm_anon_type = buffer[1];
1362         msg->cm_format_type = buffer[2];
1363
1364         for (pos = 3; pos < size; ++pos) {
1365                 field = buffer[pos];
1366                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1367                 pos = pos + strlen(&buffer[(int)pos]);
1368         }
1369
1370         /* Check for message routing */
1371         if (msg->cm_fields['D'] != NULL) {
1372                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1373
1374                         /* route the message */
1375                         strcpy(nexthop, "");
1376                         if (is_valid_node(nexthop, NULL,
1377                            msg->cm_fields['D']) == 0) {
1378
1379                                 /* prepend our node to the path */
1380                                 if (msg->cm_fields['P'] != NULL) {
1381                                         oldpath = msg->cm_fields['P'];
1382                                         msg->cm_fields['P'] = NULL;
1383                                 }
1384                                 else {
1385                                         oldpath = strdup("unknown_user");
1386                                 }
1387                                 size = strlen(oldpath) + SIZ;
1388                                 msg->cm_fields['P'] = malloc(size);
1389                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1390                                         config.c_nodename, oldpath);
1391                                 free(oldpath);
1392
1393                                 /* serialize the message */
1394                                 serialize_message(&sermsg, msg);
1395
1396                                 /* now send it */
1397                                 if (strlen(nexthop) == 0) {
1398                                         strcpy(nexthop, msg->cm_fields['D']);
1399                                 }
1400                                 snprintf(filename,
1401                                                  sizeof filename,
1402                                                  "%s/%s",
1403                                                  ctdl_netout_dir,
1404                                                  nexthop);
1405                                 lprintf(CTDL_DEBUG, "Appending to %s\n", filename);
1406                                 fp = fopen(filename, "ab");
1407                                 if (fp != NULL) {
1408                                         fwrite(sermsg.ser,
1409                                                 sermsg.len, 1, fp);
1410                                         fclose(fp);
1411                                 }
1412                                 else {
1413                                         lprintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1414                                 }
1415                                 free(sermsg.ser);
1416                                 CtdlFreeMessage(msg);
1417                                 return;
1418                         }
1419
1420                         else {  /* invalid destination node name */
1421
1422                                 network_bounce(msg,
1423 "A message you sent could not be delivered due to an invalid destination node"
1424 " name.  Please check the address and try sending the message again.\n");
1425                                 msg = NULL;
1426                                 return;
1427
1428                         }
1429                 }
1430         }
1431
1432         /*
1433          * Check to see if we already have a copy of this message, and
1434          * abort its processing if so.  (We used to post a warning to Aide>
1435          * every time this happened, but the network is now so densely
1436          * connected that it's inevitable.)
1437          */
1438         if (network_usetable(msg) != 0) {
1439                 return;
1440         }
1441
1442         /* Learn network topology from the path */
1443         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1444                 network_learn_topology(msg->cm_fields['N'],
1445                                         msg->cm_fields['P']);
1446         }
1447
1448         /* Is the sending node giving us a very persuasive suggestion about
1449          * which room this message should be saved in?  If so, go with that.
1450          */
1451         if (msg->cm_fields['C'] != NULL) {
1452                 safestrncpy(target_room,
1453                         msg->cm_fields['C'],
1454                         sizeof target_room);
1455         }
1456
1457         /* Otherwise, does it have a recipient?  If so, validate it... */
1458         else if (msg->cm_fields['R'] != NULL) {
1459                 recp = validate_recipients(msg->cm_fields['R']);
1460                 if (recp != NULL) if (recp->num_error != 0) {
1461                         network_bounce(msg,
1462 "A message you sent could not be delivered due to an invalid address.\n"
1463 "Please check the address and try sending the message again.\n");
1464                         msg = NULL;
1465                         free(recp);
1466                         return;
1467                 }
1468                 strcpy(target_room, "");        /* no target room if mail */
1469         }
1470
1471         /* Our last shot at finding a home for this message is to see if
1472          * it has the O field (Originating room) set.
1473          */
1474         else if (msg->cm_fields['O'] != NULL) {
1475                 safestrncpy(target_room,
1476                         msg->cm_fields['O'],
1477                         sizeof target_room);
1478         }
1479
1480         /* Strip out fields that are only relevant during transit */
1481         if (msg->cm_fields['D'] != NULL) {
1482                 free(msg->cm_fields['D']);
1483                 msg->cm_fields['D'] = NULL;
1484         }
1485         if (msg->cm_fields['C'] != NULL) {
1486                 free(msg->cm_fields['C']);
1487                 msg->cm_fields['C'] = NULL;
1488         }
1489
1490         /* save the message into a room */
1491         if (PerformNetprocHooks(msg, target_room) == 0) {
1492                 msg->cm_flags = CM_SKIP_HOOKS;
1493                 CtdlSubmitMsg(msg, recp, target_room);
1494         }
1495         CtdlFreeMessage(msg);
1496         free(recp);
1497 }
1498
1499
1500 /*
1501  * Process a single message from a single file from the inbound queue
1502  */
1503 void network_process_message(FILE *fp, long msgstart, long msgend) {
1504         long hold_pos;
1505         long size;
1506         char *buffer;
1507
1508         hold_pos = ftell(fp);
1509         size = msgend - msgstart + 1;
1510         buffer = malloc(size);
1511         if (buffer != NULL) {
1512                 fseek(fp, msgstart, SEEK_SET);
1513                 fread(buffer, size, 1, fp);
1514                 network_process_buffer(buffer, size);
1515                 free(buffer);
1516         }
1517
1518         fseek(fp, hold_pos, SEEK_SET);
1519 }
1520
1521
1522 /*
1523  * Process a single file from the inbound queue
1524  */
1525 void network_process_file(char *filename) {
1526         FILE *fp;
1527         long msgstart = (-1L);
1528         long msgend = (-1L);
1529         long msgcur = 0L;
1530         int ch;
1531
1532
1533         fp = fopen(filename, "rb");
1534         if (fp == NULL) {
1535                 lprintf(CTDL_CRIT, "Error opening %s: %s\n",
1536                         filename, strerror(errno));
1537                 return;
1538         }
1539
1540         lprintf(CTDL_INFO, "network: processing <%s>\n", filename);
1541
1542         /* Look for messages in the data stream and break them out */
1543         while (ch = getc(fp), ch >= 0) {
1544
1545                 if (ch == 255) {
1546                         if (msgstart >= 0L) {
1547                                 msgend = msgcur - 1;
1548                                 network_process_message(fp, msgstart, msgend);
1549                         }
1550                         msgstart = msgcur;
1551                 }
1552
1553                 ++msgcur;
1554         }
1555
1556         msgend = msgcur - 1;
1557         if (msgstart >= 0L) {
1558                 network_process_message(fp, msgstart, msgend);
1559         }
1560
1561         fclose(fp);
1562         unlink(filename);
1563 }
1564
1565
1566 /*
1567  * Process anything in the inbound queue
1568  */
1569 void network_do_spoolin(void) {
1570         DIR *dp;
1571         struct dirent *d;
1572         struct stat statbuf;
1573         char filename[256];
1574         static time_t last_spoolin_mtime = 0L;
1575
1576         /*
1577          * Check the spoolin directory's modification time.  If it hasn't
1578          * been touched, we don't need to scan it.
1579          */
1580         if (stat(ctdl_netin_dir, &statbuf)) return;
1581         if (statbuf.st_mtime == last_spoolin_mtime) {
1582                 lprintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1583                 return;
1584         }
1585         last_spoolin_mtime = statbuf.st_mtime;
1586         lprintf(CTDL_DEBUG, "network: processing inbound queue\n");
1587
1588         /*
1589          * Ok, there's something interesting in there, so scan it.
1590          */
1591         dp = opendir(ctdl_netin_dir);
1592         if (dp == NULL) return;
1593
1594         while (d = readdir(dp), d != NULL) {
1595                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1596                         snprintf(filename,
1597                                          sizeof filename,
1598                                          "%s/%s",
1599                                          ctdl_netin_dir,
1600                                          d->d_name);
1601                         network_process_file(filename);
1602                 }
1603         }
1604
1605         closedir(dp);
1606 }
1607
1608 /*
1609  * Delete any files in the outbound queue that were intended
1610  * to be sent to nodes which no longer exist.
1611  */
1612 void network_purge_spoolout(void) {
1613         DIR *dp;
1614         struct dirent *d;
1615         char filename[256];
1616         char nexthop[256];
1617         int i;
1618
1619         dp = opendir(ctdl_netout_dir);
1620         if (dp == NULL) return;
1621
1622         while (d = readdir(dp), d != NULL) {
1623                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1624                         continue;
1625                 snprintf(filename,
1626                                  sizeof filename,
1627                                  "%s/%s",
1628                                  ctdl_netout_dir,
1629                                  d->d_name);
1630
1631                 strcpy(nexthop, "");
1632                 i = is_valid_node(nexthop, NULL, d->d_name);
1633
1634                 if ( (i != 0) || (strlen(nexthop) > 0) ) {
1635                         unlink(filename);
1636                 }
1637         }
1638
1639
1640         closedir(dp);
1641 }
1642
1643
1644 /*
1645  * receive network spool from the remote system
1646  */
1647 void receive_spool(int sock, char *remote_nodename) {
1648         long download_len;
1649         long bytes_received;
1650         char buf[SIZ];
1651         static char pbuf[IGNET_PACKET_SIZE];
1652         char tempfilename[PATH_MAX];
1653         long plen;
1654         FILE *fp;
1655
1656         CtdlMakeTempFileName(tempfilename, sizeof tempfilename);
1657         if (sock_puts(sock, "NDOP") < 0) return;
1658         if (sock_gets(sock, buf) < 0) return;
1659         lprintf(CTDL_DEBUG, "<%s\n", buf);
1660         if (buf[0] != '2') {
1661                 return;
1662         }
1663         download_len = extract_long(&buf[4], 0);
1664
1665         bytes_received = 0L;
1666         fp = fopen(tempfilename, "w");
1667         if (fp == NULL) {
1668                 lprintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1669                         strerror(errno));
1670                 return;
1671         }
1672
1673         while (bytes_received < download_len) {
1674                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1675                         bytes_received,
1676                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1677                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1678                 if (sock_puts(sock, buf) < 0) {
1679                         fclose(fp);
1680                         unlink(tempfilename);
1681                         return;
1682                 }
1683                 if (sock_gets(sock, buf) < 0) {
1684                         fclose(fp);
1685                         unlink(tempfilename);
1686                         return;
1687                 }
1688                 if (buf[0] == '6') {
1689                         plen = extract_long(&buf[4], 0);
1690                         if (sock_read(sock, pbuf, plen) < 0) {
1691                                 fclose(fp);
1692                                 unlink(tempfilename);
1693                                 return;
1694                         }
1695                         fwrite((char *) pbuf, plen, 1, fp);
1696                         bytes_received = bytes_received + plen;
1697                 }
1698         }
1699
1700         fclose(fp);
1701         if (sock_puts(sock, "CLOS") < 0) {
1702                 unlink(tempfilename);
1703                 return;
1704         }
1705         if (sock_gets(sock, buf) < 0) {
1706                 unlink(tempfilename);
1707                 return;
1708         }
1709         if (download_len > 0)
1710                 lprintf(CTDL_NOTICE, "Received %ld octets from <%s>",
1711                                 download_len, remote_nodename);
1712         lprintf(CTDL_DEBUG, "%s", buf);
1713         /* TODO: make move inline. forking is verry expensive. */
1714         snprintf(buf,
1715                          sizeof buf,
1716                          "mv %s %s/%s.%ld",
1717                          tempfilename,
1718                          ctdl_netin_dir,
1719                          remote_nodename,
1720                          (long) getpid());
1721         system(buf);
1722 }
1723
1724
1725
1726 /*
1727  * transmit network spool to the remote system
1728  */
1729 void transmit_spool(int sock, char *remote_nodename)
1730 {
1731         char buf[SIZ];
1732         char pbuf[4096];
1733         long plen;
1734         long bytes_to_write, thisblock, bytes_written;
1735         int fd;
1736         char sfname[128];
1737
1738         if (sock_puts(sock, "NUOP") < 0) return;
1739         if (sock_gets(sock, buf) < 0) return;
1740         lprintf(CTDL_DEBUG, "<%s\n", buf);
1741         if (buf[0] != '2') {
1742                 return;
1743         }
1744
1745         snprintf(sfname, sizeof sfname,
1746                          "%s/%s",
1747                          ctdl_netout_dir,
1748                          remote_nodename);
1749         fd = open(sfname, O_RDONLY);
1750         if (fd < 0) {
1751                 if (errno != ENOENT) {
1752                         lprintf(CTDL_CRIT, "cannot open upload file locally: %s\n",
1753                                 strerror(errno));
1754                 }
1755                 return;
1756         }
1757         bytes_written = 0;
1758         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1759                 bytes_to_write = plen;
1760                 while (bytes_to_write > 0L) {
1761                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1762                         if (sock_puts(sock, buf) < 0) {
1763                                 close(fd);
1764                                 return;
1765                         }
1766                         if (sock_gets(sock, buf) < 0) {
1767                                 close(fd);
1768                                 return;
1769                         }
1770                         thisblock = atol(&buf[4]);
1771                         if (buf[0] == '7') {
1772                                 if (sock_write(sock, pbuf,
1773                                    (int) thisblock) < 0) {
1774                                         close(fd);
1775                                         return;
1776                                 }
1777                                 bytes_to_write -= thisblock;
1778                                 bytes_written += thisblock;
1779                         } else {
1780                                 goto ABORTUPL;
1781                         }
1782                 }
1783         }
1784
1785 ABORTUPL:
1786         close(fd);
1787         if (sock_puts(sock, "UCLS 1") < 0) return;
1788         if (sock_gets(sock, buf) < 0) return;
1789         lprintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n",
1790                         bytes_written, remote_nodename);
1791         lprintf(CTDL_DEBUG, "<%s\n", buf);
1792         if (buf[0] == '2') {
1793                 lprintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
1794                 unlink(sfname);
1795         }
1796 }
1797
1798
1799
1800 /*
1801  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1802  */
1803 void network_poll_node(char *node, char *secret, char *host, char *port) {
1804         int sock;
1805         char buf[SIZ];
1806
1807         if (network_talking_to(node, NTT_CHECK)) return;
1808         network_talking_to(node, NTT_ADD);
1809         lprintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
1810
1811         sock = sock_connect(host, port, "tcp");
1812         if (sock < 0) {
1813                 lprintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
1814                 network_talking_to(node, NTT_REMOVE);
1815                 return;
1816         }
1817
1818         lprintf(CTDL_DEBUG, "Connected!\n");
1819
1820         /* Read the server greeting */
1821         if (sock_gets(sock, buf) < 0) goto bail;
1822         lprintf(CTDL_DEBUG, ">%s\n", buf);
1823
1824         /* Identify ourselves */
1825         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1826         lprintf(CTDL_DEBUG, "<%s\n", buf);
1827         if (sock_puts(sock, buf) <0) goto bail;
1828         if (sock_gets(sock, buf) < 0) goto bail;
1829         lprintf(CTDL_DEBUG, ">%s\n", buf);
1830         if (buf[0] != '2') goto bail;
1831
1832         /* At this point we are authenticated. */
1833         receive_spool(sock, node);
1834         transmit_spool(sock, node);
1835
1836         sock_puts(sock, "QUIT");
1837 bail:   sock_close(sock);
1838         network_talking_to(node, NTT_REMOVE);
1839 }
1840
1841
1842
1843 /*
1844  * Poll other Citadel nodes and transfer inbound/outbound network data.
1845  * Set "full" to nonzero to force a poll of every node, or to zero to poll
1846  * only nodes to which we have data to send.
1847  */
1848 void network_poll_other_citadel_nodes(int full_poll) {
1849         int i;
1850         char linebuf[256];
1851         char node[SIZ];
1852         char host[256];
1853         char port[256];
1854         char secret[256];
1855         int poll = 0;
1856         char spoolfile[256];
1857
1858         if (working_ignetcfg == NULL) {
1859                 lprintf(CTDL_DEBUG, "No nodes defined - not polling\n");
1860                 return;
1861         }
1862
1863         /* Use the string tokenizer to grab one line at a time */
1864         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
1865                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
1866                 extract_token(node, linebuf, 0, '|', sizeof node);
1867                 extract_token(secret, linebuf, 1, '|', sizeof secret);
1868                 extract_token(host, linebuf, 2, '|', sizeof host);
1869                 extract_token(port, linebuf, 3, '|', sizeof port);
1870                 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1871                    && (strlen(host) > 0) && strlen(port) > 0) {
1872                         poll = full_poll;
1873                         if (poll == 0) {
1874                                 snprintf(spoolfile,
1875                                                  sizeof spoolfile,
1876                                                  "%s/%s",
1877                                                  ctdl_netout_dir,
1878                                                  node);
1879                                 if (access(spoolfile, R_OK) == 0) {
1880                                         poll = 1;
1881                                 }
1882                         }
1883                         if (poll) {
1884                                 network_poll_node(node, secret, host, port);
1885                         }
1886                 }
1887         }
1888
1889 }
1890
1891
1892
1893
1894 /*
1895  * It's ok if these directories already exist.  Just fail silently.
1896  */
1897 void create_spool_dirs(void) {
1898         mkdir(ctdl_spool_dir, 0700);
1899         chown(ctdl_spool_dir, CTDLUID, (-1));
1900         mkdir(ctdl_netin_dir, 0700);
1901         chown(ctdl_netin_dir, CTDLUID, (-1));
1902         mkdir(ctdl_netout_dir, 0700);
1903         chown(ctdl_netout_dir, CTDLUID, (-1));
1904 }
1905
1906
1907
1908
1909
1910 /*
1911  * network_do_queue()
1912  *
1913  * Run through the rooms doing various types of network stuff.
1914  */
1915 void network_do_queue(void) {
1916         static time_t last_run = 0L;
1917         struct RoomProcList *ptr;
1918         int full_processing = 1;
1919
1920         /*
1921          * Run the full set of processing tasks no more frequently
1922          * than once every n seconds
1923          */
1924         if ( (time(NULL) - last_run) < config.c_net_freq ) {
1925                 full_processing = 0;
1926         }
1927
1928         /*
1929          * This is a simple concurrency check to make sure only one queue run
1930          * is done at a time.  We could do this with a mutex, but since we
1931          * don't really require extremely fine granularity here, we'll do it
1932          * with a static variable instead.
1933          */
1934         if (doing_queue) return;
1935         doing_queue = 1;
1936
1937         /* Load the IGnet Configuration into memory */
1938         load_working_ignetcfg();
1939
1940         /*
1941          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
1942          * then we poll everyone.  Otherwise we only poll nodes we have stuff
1943          * to send to.
1944          */
1945         network_poll_other_citadel_nodes(full_processing);
1946
1947         /*
1948          * Load the network map and filter list into memory.
1949          */
1950         read_network_map();
1951         filterlist = load_filter_list();
1952
1953         /*
1954          * Go ahead and run the queue
1955          */
1956         if (full_processing) {
1957                 lprintf(CTDL_DEBUG, "network: loading outbound queue\n");
1958                 ForEachRoom(network_queue_room, NULL);
1959         }
1960
1961         if (rplist != NULL) {
1962                 lprintf(CTDL_DEBUG, "network: running outbound queue\n");
1963                 while (rplist != NULL) {
1964                         char spoolroomname[ROOMNAMELEN];
1965                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
1966                         begin_critical_section(S_RPLIST);
1967
1968                         /* pop this record off the list */
1969                         ptr = rplist;
1970                         rplist = rplist->next;
1971                         free(ptr);
1972
1973                         /* invalidate any duplicate entries to prevent double processing */
1974                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
1975                                 if (!strcasecmp(ptr->name, spoolroomname)) {
1976                                         ptr->name[0] = 0;
1977                                 }
1978                         }
1979
1980                         end_critical_section(S_RPLIST);
1981                         if (spoolroomname[0] != 0) {
1982                                 network_spoolout_room(spoolroomname);
1983                         }
1984                 }
1985         }
1986
1987         /* If there is anything in the inbound queue, process it */
1988         network_do_spoolin();
1989
1990         /* Save the network map back to disk */
1991         write_network_map();
1992
1993         /* Free the filter list in memory */
1994         free_filter_list(filterlist);
1995         filterlist = NULL;
1996
1997         network_purge_spoolout();
1998
1999         lprintf(CTDL_DEBUG, "network: queue run completed\n");
2000
2001         if (full_processing) {
2002                 last_run = time(NULL);
2003         }
2004
2005         doing_queue = 0;
2006 }
2007
2008
2009 /*
2010  * cmd_netp() - authenticate to the server as another Citadel node polling
2011  *            for network traffic
2012  */
2013 void cmd_netp(char *cmdbuf)
2014 {
2015         char node[256];
2016         char pass[256];
2017         int v;
2018
2019         char secret[256];
2020         char nexthop[256];
2021
2022         /* Authenticate */
2023         extract_token(node, cmdbuf, 0, '|', sizeof node);
2024         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2025
2026         if (doing_queue) {
2027                 lprintf(CTDL_WARNING, "Network node <%s> refused - spooling", node);
2028                 cprintf("%d spooling - try again in a few minutes\n",
2029                         ERROR + RESOURCE_BUSY);
2030                 return;
2031         }
2032
2033         /* load the IGnet Configuration to check node validity */
2034         load_working_ignetcfg();
2035         v = is_valid_node(nexthop, secret, node);
2036
2037         if (v != 0) {
2038                 lprintf(CTDL_WARNING, "Unknown node <%s>\n", node);
2039                 cprintf("%d authentication failed\n",
2040                         ERROR + PASSWORD_REQUIRED);
2041                 return;
2042         }
2043
2044         if (strcasecmp(pass, secret)) {
2045                 lprintf(CTDL_WARNING, "Bad password for network node <%s>", node);
2046                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2047                 return;
2048         }
2049
2050         if (network_talking_to(node, NTT_CHECK)) {
2051                 lprintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2052                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2053                 return;
2054         }
2055
2056         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2057         network_talking_to(node, NTT_ADD);
2058         lprintf(CTDL_NOTICE, "Network node <%s> logged in\n", CC->net_node);
2059         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
2060                 CC->net_node);
2061 }
2062
2063 /*
2064  * Module entry point
2065  */
2066 char *serv_network_init(void)
2067 {
2068         create_spool_dirs();
2069         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2070         CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2071         CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2072         CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2073         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
2074         return "$Id$";
2075 }