citadel/serv_network.c

   1 /*
   2  * $Id$
   3  *
   4  * This module handles shared rooms, inter-Citadel mail, and outbound
   5  * mailing list processing.
   6  *
   7  * Copyright (C) 2000-2002 by Art Cancro and others.
   8  * This code is released under the terms of the GNU General Public License.
   9  *
  10  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  11  * This is a fairly high-level type of critical section.  It ensures that no
  12  * two threads work on the netconfigs files at the same time.  Since we do
  13  * so many things inside these, here are the rules:
  14  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  15  *  2. Do *not* perform any I/O with the client during these sections.
  16  *
  17  */
  18
  19 /*
  20  * 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/types.h>
  35 #include <dirent.h>
  36 #if TIME_WITH_SYS_TIME
  37 # include <sys/time.h>
  38 # include <time.h>
  39 #else
  40 # if HAVE_SYS_TIME_H
  41 #  include <sys/time.h>
  42 # else
  43 #  include <time.h>
  44 # endif
  45 #endif
  46
  47 #include <sys/wait.h>
  48 #include <string.h>
  49 #include <limits.h>
  50 #include "citadel.h"
  51 #include "server.h"
  52 #include "sysdep_decls.h"
  53 #include "citserver.h"
  54 #include "support.h"
  55 #include "config.h"
  56 #include "serv_extensions.h"
  57 #include "room_ops.h"
  58 #include "user_ops.h"
  59 #include "policy.h"
  60 #include "database.h"
  61 #include "msgbase.h"
  62 #include "tools.h"
  63 #include "internet_addressing.h"
  64 #include "serv_network.h"
  65 #include "clientsocket.h"
  66 #include "file_ops.h"
  67
  68 #ifndef HAVE_SNPRINTF
  69 #include "snprintf.h"
  70 #endif
  71
  72 /* Nonzero while we are doing outbound network processing */
  73 static int doing_queue = 0;
  74
  75 /*
  76  * When we do network processing, it's accomplished in two passes; one to
  77  * gather a list of rooms and one to actually do them.  It's ok that rplist
  78  * is global; this process *only* runs as part of the housekeeping loop and
  79  * therefore only one will run at a time.
  80  */
  81 struct RoomProcList *rplist = NULL;
  82
  83 /*
  84  * We build a map of network nodes during processing.
  85  */
  86 struct NetMap *the_netmap = NULL;
  87
  88 /*
  89  * Keep track of what messages to reject
  90  */
  91 struct FilterList *load_filter_list(void) {
  92         char *serialized_list = NULL;
  93         int i;
  94         char buf[SIZ];
  95         struct FilterList *newlist = NULL;
  96         struct FilterList *nptr;
  97
  98         serialized_list = CtdlGetSysConfig(FILTERLIST);
  99         if (serialized_list == NULL) return(NULL); /* if null, no entries */
 100
 101         /* Use the string tokenizer to grab one line at a time */
 102         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
 103                 extract_token(buf, serialized_list, i, '\n');
 104                 nptr = (struct FilterList *) mallok(sizeof(struct FilterList));
 105                 extract(nptr->fl_user, buf, 0);
 106                 striplt(nptr->fl_user);
 107                 extract(nptr->fl_room, buf, 1);
 108                 striplt(nptr->fl_room);
 109                 extract(nptr->fl_node, buf, 2);
 110                 striplt(nptr->fl_node);
 111
 112                 /* Cowardly refuse to add an any/any/any entry that would
 113                  * end up filtering every single message.
 114                  */
 115                 if (strlen(nptr->fl_user) + strlen(nptr->fl_room)
 116                    + strlen(nptr->fl_node) == 0) {
 117                         phree(nptr);
 118                 }
 119                 else {
 120                         nptr->next = newlist;
 121                         newlist = nptr;
 122                 }
 123         }
 124
 125         phree(serialized_list);
 126         return newlist;
 127 }
 128
 129
 130 void free_filter_list(struct FilterList *fl) {
 131         if (fl == NULL) return;
 132         free_filter_list(fl->next);
 133         phree(fl);
 134 }
 135
 136
 137
 138 /*
 139  * Check the use table.  This is a list of messages which have recently
 140  * arrived on the system.  It is maintained and queried to prevent the same
 141  * message from being entered into the database multiple times if it happens
 142  * to arrive multiple times by accident.
 143  */
 144 int network_usetable(struct CtdlMessage *msg) {
 145
 146         char msgid[SIZ];
 147         struct cdbdata *cdbut;
 148         struct UseTable ut;
 149
 150         /* Bail out if we can't generate a message ID */
 151         if (msg == NULL) {
 152                 return(0);
 153         }
 154         if (msg->cm_fields['I'] == NULL) {
 155                 return(0);
 156         }
 157         if (strlen(msg->cm_fields['I']) == 0) {
 158                 return(0);
 159         }
 160
 161         /* Generate the message ID */
 162         strcpy(msgid, msg->cm_fields['I']);
 163         if (haschar(msgid, '@') == 0) {
 164                 strcat(msgid, "@");
 165                 if (msg->cm_fields['N'] != NULL) {
 166                         strcat(msgid, msg->cm_fields['N']);
 167                 }
 168                 else {
 169                         return(0);
 170                 }
 171         }
 172
 173         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 174         if (cdbut != NULL) {
 175                 cdb_free(cdbut);
 176                 return(1);
 177         }
 178
 179         /* If we got to this point, it's unique: add it. */
 180         strcpy(ut.ut_msgid, msgid);
 181         ut.ut_timestamp = time(NULL);
 182         cdb_store(CDB_USETABLE, msgid, strlen(msgid),
 183                 &ut, sizeof(struct UseTable) );
 184         return(0);
 185 }
 186
 187
 188 /*
 189  * Read the network map from its configuration file into memory.
 190  */
 191 void read_network_map(void) {
 192         char *serialized_map = NULL;
 193         int i;
 194         char buf[SIZ];
 195         struct NetMap *nmptr;
 196
 197         serialized_map = CtdlGetSysConfig(IGNETMAP);
 198         if (serialized_map == NULL) return;     /* if null, no entries */
 199
 200         /* Use the string tokenizer to grab one line at a time */
 201         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 202                 extract_token(buf, serialized_map, i, '\n');
 203                 nmptr = (struct NetMap *) mallok(sizeof(struct NetMap));
 204                 extract(nmptr->nodename, buf, 0);
 205                 nmptr->lastcontact = extract_long(buf, 1);
 206                 extract(nmptr->nexthop, buf, 2);
 207                 nmptr->next = the_netmap;
 208                 the_netmap = nmptr;
 209         }
 210
 211         phree(serialized_map);
 212 }
 213
 214
 215 /*
 216  * Write the network map from memory back to the configuration file.
 217  */
 218 void write_network_map(void) {
 219         char *serialized_map = NULL;
 220         struct NetMap *nmptr;
 221
 222         serialized_map = strdoop("");
 223
 224         if (the_netmap != NULL) {
 225                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 226                         serialized_map = reallok(serialized_map,
 227                                                 (strlen(serialized_map)+SIZ) );
 228                         if (strlen(nmptr->nodename) > 0) {
 229                                 snprintf(&serialized_map[strlen(serialized_map)],
 230                                         SIZ,
 231                                         "%s|%ld|%s\n",
 232                                         nmptr->nodename,
 233                                         (long)nmptr->lastcontact,
 234                                         nmptr->nexthop);
 235                         }
 236                 }
 237         }
 238
 239         CtdlPutSysConfig(IGNETMAP, serialized_map);
 240         phree(serialized_map);
 241
 242         /* Now free the list */
 243         while (the_netmap != NULL) {
 244                 nmptr = the_netmap->next;
 245                 phree(the_netmap);
 246                 the_netmap = nmptr;
 247         }
 248 }
 249
 250
 251
 252 /*
 253  * Check the network map and determine whether the supplied node name is
 254  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 255  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 256  * shared secret.
 257  */
 258 int is_valid_node(char *nexthop, char *secret, char *node) {
 259         char *ignetcfg = NULL;
 260         int i;
 261         char linebuf[SIZ];
 262         char buf[SIZ];
 263         int retval;
 264         struct NetMap *nmptr;
 265
 266         if (node == NULL) {
 267                 return(-1);
 268         }
 269
 270         /*
 271          * First try the neighbor nodes
 272          */
 273         ignetcfg = CtdlGetSysConfig(IGNETCFG);
 274         if (ignetcfg == NULL) {
 275                 if (nexthop != NULL) {
 276                         strcpy(nexthop, "");
 277                 }
 278                 return(-1);
 279         }
 280
 281         retval = (-1);
 282         if (nexthop != NULL) {
 283                 strcpy(nexthop, "");
 284         }
 285
 286         /* Use the string tokenizer to grab one line at a time */
 287         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
 288                 extract_token(linebuf, ignetcfg, i, '\n');
 289                 extract(buf, linebuf, 0);
 290                 if (!strcasecmp(buf, node)) {
 291                         if (nexthop != NULL) {
 292                                 strcpy(nexthop, "");
 293                         }
 294                         if (secret != NULL) {
 295                                 extract(secret, linebuf, 1);
 296                         }
 297                         retval = 0;
 298                 }
 299         }
 300
 301         phree(ignetcfg);
 302         if (retval == 0) {
 303                 return(retval);         /* yup, it's a direct neighbor */
 304         }
 305
 306         /*
 307          * If we get to this point we have to see if we know the next hop
 308          */
 309         if (the_netmap != NULL) {
 310                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 311                         if (!strcasecmp(nmptr->nodename, node)) {
 312                                 if (nexthop != NULL) {
 313                                         strcpy(nexthop, nmptr->nexthop);
 314                                 }
 315                                 return(0);
 316                         }
 317                 }
 318         }
 319
 320         /*
 321          * If we get to this point, the supplied node name is bogus.
 322          */
 323         lprintf(5, "Invalid node name <%s>\n", node);
 324         return(-1);
 325 }
 326
 327
 328
 329
 330
 331 void cmd_gnet(char *argbuf) {
 332         char filename[SIZ];
 333         char buf[SIZ];
 334         FILE *fp;
 335
 336         if (CtdlAccessCheck(ac_room_aide)) return;
 337         assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
 338         cprintf("%d Network settings for room #%ld <%s>\n",
 339                 LISTING_FOLLOWS,
 340                 CC->room.QRnumber, CC->room.QRname);
 341
 342         fp = fopen(filename, "r");
 343         if (fp != NULL) {
 344                 while (fgets(buf, sizeof buf, fp) != NULL) {
 345                         buf[strlen(buf)-1] = 0;
 346                         cprintf("%s\n", buf);
 347                 }
 348                 fclose(fp);
 349         }
 350
 351         cprintf("000\n");
 352 }
 353
 354
 355 void cmd_snet(char *argbuf) {
 356         char tempfilename[SIZ];
 357         char filename[SIZ];
 358         char buf[SIZ];
 359         FILE *fp;
 360
 361         if (CtdlAccessCheck(ac_room_aide)) return;
 362         safestrncpy(tempfilename, tmpnam(NULL), sizeof tempfilename);
 363         assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
 364
 365         fp = fopen(tempfilename, "w");
 366         if (fp == NULL) {
 367                 cprintf("%d Cannot open %s: %s\n",
 368                         ERROR+INTERNAL_ERROR,
 369                         tempfilename,
 370                         strerror(errno));
 371         }
 372
 373         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 374         while (client_gets(buf), strcmp(buf, "000")) {
 375                 fprintf(fp, "%s\n", buf);
 376         }
 377         fclose(fp);
 378
 379         /* Now copy the temp file to its permanent location
 380          * (We use /bin/mv instead of link() because they may be on
 381          * different filesystems)
 382          */
 383         unlink(filename);
 384         snprintf(buf, sizeof buf, "/bin/mv %s %s", tempfilename, filename);
 385         begin_critical_section(S_NETCONFIGS);
 386         system(buf);
 387         end_critical_section(S_NETCONFIGS);
 388 }
 389
 390
 391 /*
 392  * Spools out one message from the list.
 393  */
 394 void network_spool_msg(long msgnum, void *userdata) {
 395         struct SpoolControl *sc;
 396         int err;
 397         int i;
 398         char *newpath = NULL;
 399         char *instr = NULL;
 400         size_t instr_len = SIZ;
 401         struct CtdlMessage *msg = NULL;
 402         struct CtdlMessage *imsg;
 403         struct namelist *nptr;
 404         struct ser_ret sermsg;
 405         FILE *fp;
 406         char filename[SIZ];
 407         char buf[SIZ];
 408         int bang = 0;
 409         int send = 1;
 410         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 411
 412         sc = (struct SpoolControl *)userdata;
 413
 414         /*
 415          * Process mailing list recipients
 416          */
 417         if (sc->listrecps != NULL) {
 418
 419                 /* First, copy it to the spoolout room */
 420                 err = CtdlSaveMsgPointerInRoom(SMTP_SPOOLOUT_ROOM, msgnum, 0);
 421                 if (err != 0) return;
 422
 423                 /*
 424                  * Figure out how big a buffer we need to allocate
 425                  */
 426                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 427                         instr_len = instr_len + strlen(nptr->name);
 428                 }
 429
 430                 /*
 431                  * allocate...
 432                  */
 433                 lprintf(9, "Generating delivery instructions\n");
 434                 instr = mallok(instr_len);
 435                 if (instr == NULL) {
 436                         lprintf(1, "Cannot allocate %ld bytes for instr...\n",
 437                                 (long)instr_len);
 438                         abort();
 439                 }
 440                 snprintf(instr, instr_len,
 441                         "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 442                         "bounceto|postmaster@%s\n" ,
 443                         SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
 444
 445                 /* Generate delivery instructions for each recipient */
 446                 for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 447                         size_t tmp = strlen(instr);
 448                         snprintf(&instr[tmp], instr_len - tmp,
 449                                  "remote|%s|0||\n", nptr->name);
 450                 }
 451
 452                 /*
 453                  * Generate a message from the instructions
 454                  */
 455                 imsg = mallok(sizeof(struct CtdlMessage));
 456                 memset(imsg, 0, sizeof(struct CtdlMessage));
 457                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
 458                 imsg->cm_anon_type = MES_NORMAL;
 459                 imsg->cm_format_type = FMT_RFC822;
 460                 imsg->cm_fields['A'] = strdoop("Citadel");
 461                 imsg->cm_fields['M'] = instr;
 462
 463                 /* Save delivery instructions in spoolout room */
 464                 CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 465                 CtdlFreeMessage(imsg);
 466         }
 467
 468         /*
 469          * Process digest recipients
 470          */
 471         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 472                 fprintf(sc->digestfp,   " -----------------------------------"
 473                                         "------------------------------------"
 474                                         "-------\n");
 475                 CtdlRedirectOutput(sc->digestfp, -1);
 476                 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 0);
 477                 CtdlRedirectOutput(NULL, -1);
 478                 sc->num_msgs_spooled += 1;
 479         }
 480
 481         /*
 482          * Process IGnet push shares
 483          */
 484         if (sc->ignet_push_shares != NULL) {
 485
 486                 msg = CtdlFetchMessage(msgnum);
 487                 if (msg != NULL) {
 488                         size_t newpath_len;
 489
 490                         /* Prepend our node name to the Path field whenever
 491                          * sending a message to another IGnet node
 492                          */
 493                         if (msg->cm_fields['P'] == NULL) {
 494                                 msg->cm_fields['P'] = strdoop("username");
 495                         }
 496                         newpath_len = strlen(msg->cm_fields['P']) +
 497                                  strlen(config.c_nodename) + 2;
 498                         newpath = mallok(newpath_len);
 499                         snprintf(newpath, newpath_len, "%s!%s",
 500                                  config.c_nodename, msg->cm_fields['P']);
 501                         phree(msg->cm_fields['P']);
 502                         msg->cm_fields['P'] = newpath;
 503
 504                         /*
 505                          * Force the message to appear in the correct room
 506                          * on the far end by setting the C field correctly
 507                          */
 508                         if (msg->cm_fields['C'] != NULL) {
 509                                 phree(msg->cm_fields['C']);
 510                         }
 511                         msg->cm_fields['C'] = strdoop(CC->room.QRname);
 512
 513                         /*
 514                          * Determine if this message is set to be deleted
 515                          * after sending out on the network
 516                          */
 517                         if (msg->cm_fields['S'] != NULL) {
 518                                 if (!strcasecmp(msg->cm_fields['S'],
 519                                    "CANCEL")) {
 520                                         delete_after_send = 1;
 521                                 }
 522                         }
 523
 524                         /*
 525                          * Now serialize it for transmission
 526                          */
 527                         serialize_message(&sermsg, msg);
 528
 529                         /* Now send it to every node */
 530                         for (nptr = sc->ignet_push_shares; nptr != NULL;
 531                             nptr = nptr->next) {
 532
 533                                 send = 1;
 534
 535                                 /* Check for valid node name */
 536                                 if (is_valid_node(NULL,NULL,nptr->name) != 0) {
 537                                         lprintf(3, "Invalid node <%s>\n",
 538                                                 nptr->name);
 539                                         send = 0;
 540                                 }
 541
 542                                 /* Check for split horizon */
 543                                 lprintf(9, "Path is %s\n", msg->cm_fields['P']);
 544                                 bang = num_tokens(msg->cm_fields['P'], '!');
 545                                 if (bang > 1) for (i=0; i<(bang-1); ++i) {
 546                                         extract_token(buf, msg->cm_fields['P'],
 547                                                 i, '!');
 548                                         if (!strcasecmp(buf, nptr->name)) {
 549                                                 send = 0;
 550                                         }
 551                                 }
 552
 553                                 /* Send the message */
 554                                 if (send == 1) {
 555                                         snprintf(filename, sizeof filename,
 556                                                 "./network/spoolout/%s",
 557                                                 nptr->name);
 558                                         fp = fopen(filename, "ab");
 559                                         if (fp != NULL) {
 560                                                 fwrite(sermsg.ser,
 561                                                         sermsg.len, 1, fp);
 562                                                 fclose(fp);
 563                                         }
 564                                 }
 565                         }
 566                         phree(sermsg.ser);
 567                         CtdlFreeMessage(msg);
 568                 }
 569         }
 570
 571         /* update lastsent */
 572         sc->lastsent = msgnum;
 573
 574         /* Delete this message if delete-after-send is set */
 575         if (delete_after_send) {
 576                 CtdlDeleteMessages(CC->room.QRname, msgnum, "");
 577         }
 578
 579 }
 580
 581
 582 /*
 583  * Deliver digest messages
 584  */
 585 void network_deliver_digest(struct SpoolControl *sc) {
 586         char buf[SIZ];
 587         int i;
 588         struct CtdlMessage *msg;
 589         long msglen;
 590         long msgnum;
 591         char *instr = NULL;
 592         size_t instr_len = SIZ;
 593         struct CtdlMessage *imsg;
 594         struct namelist *nptr;
 595
 596         if (sc->num_msgs_spooled < 1) {
 597                 fclose(sc->digestfp);
 598                 sc->digestfp = NULL;
 599                 return;
 600         }
 601
 602         msg = mallok(sizeof(struct CtdlMessage));
 603         memset(msg, 0, sizeof(struct CtdlMessage));
 604         msg->cm_magic = CTDLMESSAGE_MAGIC;
 605         msg->cm_format_type = FMT_RFC822;
 606         msg->cm_anon_type = MES_NORMAL;
 607
 608         sprintf(buf, "%ld", time(NULL));
 609         msg->cm_fields['T'] = strdoop(buf);
 610         msg->cm_fields['A'] = strdoop(CC->room.QRname);
 611         msg->cm_fields['U'] = strdoop(CC->room.QRname);
 612         sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
 613         for (i=0; i<strlen(buf); ++i) {
 614                 if (isspace(buf[i])) buf[i]='_';
 615                 buf[i] = tolower(buf[i]);
 616         }
 617         msg->cm_fields['F'] = strdoop(buf);
 618
 619         fseek(sc->digestfp, 0L, SEEK_END);
 620         msglen = ftell(sc->digestfp);
 621
 622         msg->cm_fields['M'] = mallok(msglen + 1);
 623         fseek(sc->digestfp, 0L, SEEK_SET);
 624         fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 625         msg->cm_fields['M'][msglen] = 0;
 626
 627         fclose(sc->digestfp);
 628         sc->digestfp = NULL;
 629
 630         msgnum = CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
 631         CtdlFreeMessage(msg);
 632
 633         /* Now generate the delivery instructions */
 634
 635         /*
 636          * Figure out how big a buffer we need to allocate
 637          */
 638         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 639                 instr_len = instr_len + strlen(nptr->name);
 640         }
 641
 642         /*
 643          * allocate...
 644          */
 645         lprintf(9, "Generating delivery instructions\n");
 646         instr = mallok(instr_len);
 647         if (instr == NULL) {
 648                 lprintf(1, "Cannot allocate %ld bytes for instr...\n",
 649                         (long)instr_len);
 650                 abort();
 651         }
 652         snprintf(instr, instr_len,
 653                 "Content-type: %s\n\nmsgid|%ld\nsubmitted|%ld\n"
 654                 "bounceto|postmaster@%s\n" ,
 655                 SPOOLMIME, msgnum, (long)time(NULL), config.c_fqdn );
 656
 657         /* Generate delivery instructions for each recipient */
 658         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 659                 size_t tmp = strlen(instr);
 660                 snprintf(&instr[tmp], instr_len - tmp,
 661                          "remote|%s|0||\n", nptr->name);
 662         }
 663
 664         /*
 665          * Generate a message from the instructions
 666          */
 667         imsg = mallok(sizeof(struct CtdlMessage));
 668         memset(imsg, 0, sizeof(struct CtdlMessage));
 669         imsg->cm_magic = CTDLMESSAGE_MAGIC;
 670         imsg->cm_anon_type = MES_NORMAL;
 671         imsg->cm_format_type = FMT_RFC822;
 672         imsg->cm_fields['A'] = strdoop("Citadel");
 673         imsg->cm_fields['M'] = instr;
 674
 675         /* Save delivery instructions in spoolout room */
 676         CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 677         CtdlFreeMessage(imsg);
 678 }
 679
 680
 681 /*
 682  * Batch up and send all outbound traffic from the current room
 683  */
 684 void network_spoolout_room(char *room_to_spool) {
 685         char filename[SIZ];
 686         char buf[SIZ];
 687         char instr[SIZ];
 688         FILE *fp;
 689         struct SpoolControl sc;
 690         struct namelist *nptr;
 691         size_t miscsize = 0;
 692         size_t linesize = 0;
 693         int skipthisline = 0;
 694         int i;
 695
 696         if (getroom(&CC->room, room_to_spool) != 0) {
 697                 lprintf(1, "ERROR: cannot load <%s>\n", room_to_spool);
 698                 return;
 699         }
 700
 701         memset(&sc, 0, sizeof(struct SpoolControl));
 702         assoc_file_name(filename, sizeof filename, &CC->room, "netconfigs");
 703
 704         begin_critical_section(S_NETCONFIGS);
 705         end_critical_section(S_NETCONFIGS);
 706
 707         fp = fopen(filename, "r");
 708         if (fp == NULL) {
 709                 end_critical_section(S_NETCONFIGS);
 710                 return;
 711         }
 712
 713         lprintf(5, "Networking started for <%s>\n", CC->room.QRname);
 714
 715         while (fgets(buf, sizeof buf, fp) != NULL) {
 716                 buf[strlen(buf)-1] = 0;
 717
 718                 extract(instr, buf, 0);
 719                 if (!strcasecmp(instr, "lastsent")) {
 720                         sc.lastsent = extract_long(buf, 1);
 721                 }
 722                 else if (!strcasecmp(instr, "listrecp")) {
 723                         nptr = (struct namelist *)
 724                                 mallok(sizeof(struct namelist));
 725                         nptr->next = sc.listrecps;
 726                         extract(nptr->name, buf, 1);
 727                         sc.listrecps = nptr;
 728                 }
 729                 else if (!strcasecmp(instr, "digestrecp")) {
 730                         nptr = (struct namelist *)
 731                                 mallok(sizeof(struct namelist));
 732                         nptr->next = sc.digestrecps;
 733                         extract(nptr->name, buf, 1);
 734                         sc.digestrecps = nptr;
 735                 }
 736                 else if (!strcasecmp(instr, "ignet_push_share")) {
 737                         nptr = (struct namelist *)
 738                                 mallok(sizeof(struct namelist));
 739                         nptr->next = sc.ignet_push_shares;
 740                         extract(nptr->name, buf, 1);
 741                         sc.ignet_push_shares = nptr;
 742                 }
 743                 else {
 744                         /* Preserve 'other' lines ... *unless* they happen to
 745                          * be subscribe/unsubscribe pendings with expired
 746                          * timestamps.
 747                          */
 748                         skipthisline = 0;
 749                         if (!strncasecmp(buf, "subpending|", 11)) {
 750                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
 751                                         skipthisline = 1;
 752                                 }
 753                         }
 754                         if (!strncasecmp(buf, "unsubpending|", 13)) {
 755                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
 756                                         skipthisline = 1;
 757                                 }
 758                         }
 759
 760                         if (skipthisline == 0) {
 761                                 linesize = strlen(buf);
 762                                 sc.misc = realloc(sc.misc,
 763                                         (miscsize + linesize + 2) );
 764                                 sprintf(&sc.misc[miscsize], "%s\n", buf);
 765                                 miscsize = miscsize + linesize + 1;
 766                         }
 767                 }
 768
 769
 770         }
 771         fclose(fp);
 772
 773         /* If there are digest recipients, we have to build a digest */
 774         if (sc.digestrecps != NULL) {
 775                 sc.digestfp = tmpfile();
 776                 fprintf(sc.digestfp, "Content-type: text/plain\n\n");
 777         }
 778
 779         /* Do something useful */
 780         CtdlForEachMessage(MSGS_GT, sc.lastsent, NULL, NULL,
 781                 network_spool_msg, &sc);
 782
 783         /* If we wrote a digest, deliver it and then close it */
 784         snprintf(buf, sizeof buf, "room_%s@%s",
 785                 CC->room.QRname, config.c_fqdn);
 786         for (i=0; i<strlen(buf); ++i) {
 787                 buf[i] = tolower(buf[i]);
 788                 if (isspace(buf[i])) buf[i] = '_';
 789         }
 790         if (sc.digestfp != NULL) {
 791                 fprintf(sc.digestfp,    " -----------------------------------"
 792                                         "------------------------------------"
 793                                         "-------\n"
 794                                         "You are subscribed to the '%s' "
 795                                         "list.\n"
 796                                         "To post to the list: %s\n",
 797                                         CC->room.QRname, buf
 798                 );
 799                 network_deliver_digest(&sc);    /* deliver and close */
 800         }
 801
 802         /* Now rewrite the config file */
 803         fp = fopen(filename, "w");
 804         if (fp == NULL) {
 805                 lprintf(1, "ERROR: cannot open %s: %s\n",
 806                         filename, strerror(errno));
 807         }
 808         else {
 809                 fprintf(fp, "lastsent|%ld\n", sc.lastsent);
 810
 811                 /* Write out the listrecps while freeing from memory at the
 812                  * same time.  Am I clever or what?  :)
 813                  */
 814                 while (sc.listrecps != NULL) {
 815                         fprintf(fp, "listrecp|%s\n", sc.listrecps->name);
 816                         nptr = sc.listrecps->next;
 817                         phree(sc.listrecps);
 818                         sc.listrecps = nptr;
 819                 }
 820                 /* Do the same for digestrecps */
 821                 while (sc.digestrecps != NULL) {
 822                         fprintf(fp, "digestrecp|%s\n", sc.digestrecps->name);
 823                         nptr = sc.digestrecps->next;
 824                         phree(sc.digestrecps);
 825                         sc.digestrecps = nptr;
 826                 }
 827                 while (sc.ignet_push_shares != NULL) {
 828                         fprintf(fp, "ignet_push_share|%s\n",
 829                                 sc.ignet_push_shares->name);
 830                         nptr = sc.ignet_push_shares->next;
 831                         phree(sc.ignet_push_shares);
 832                         sc.ignet_push_shares = nptr;
 833                 }
 834                 if (sc.misc != NULL) {
 835                         fwrite(sc.misc, strlen(sc.misc), 1, fp);
 836                 }
 837                 phree(sc.misc);
 838
 839                 fclose(fp);
 840         }
 841         end_critical_section(S_NETCONFIGS);
 842 }
 843
 844
 845 /*
 846  * Batch up and send all outbound traffic from the current room
 847  */
 848 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
 849         struct RoomProcList *ptr;
 850
 851         ptr = (struct RoomProcList *) mallok(sizeof (struct RoomProcList));
 852         if (ptr == NULL) return;
 853
 854         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
 855         ptr->next = rplist;
 856         rplist = ptr;
 857 }
 858
 859
 860 /*
 861  * Learn topology from path fields
 862  */
 863 void network_learn_topology(char *node, char *path) {
 864         char nexthop[SIZ];
 865         struct NetMap *nmptr;
 866
 867         strcpy(nexthop, "");
 868
 869         if (num_tokens(path, '!') < 3) return;
 870         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 871                 if (!strcasecmp(nmptr->nodename, node)) {
 872                         extract_token(nmptr->nexthop, path, 0, '!');
 873                         nmptr->lastcontact = time(NULL);
 874                         return;
 875                 }
 876         }
 877
 878         /* If we got here then it's not in the map, so add it. */
 879         nmptr = (struct NetMap *) mallok(sizeof (struct NetMap));
 880         strcpy(nmptr->nodename, node);
 881         nmptr->lastcontact = time(NULL);
 882         extract_token(nmptr->nexthop, path, 0, '!');
 883         nmptr->next = the_netmap;
 884         the_netmap = nmptr;
 885 }
 886
 887
 888
 889
 890 /*
 891  * Bounce a message back to the sender
 892  */
 893 void network_bounce(struct CtdlMessage *msg, char *reason) {
 894         char *oldpath = NULL;
 895         char buf[SIZ];
 896         char bouncesource[SIZ];
 897         char recipient[SIZ];
 898         struct recptypes *valid = NULL;
 899         char force_room[ROOMNAMELEN];
 900         static int serialnum = 0;
 901         size_t size;
 902
 903         lprintf(9, "entering network_bounce()\n");
 904
 905         if (msg == NULL) return;
 906
 907         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
 908
 909         /*
 910          * Give it a fresh message ID
 911          */
 912         if (msg->cm_fields['I'] != NULL) {
 913                 phree(msg->cm_fields['I']);
 914         }
 915         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
 916                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
 917         msg->cm_fields['I'] = strdoop(buf);
 918
 919         /*
 920          * FIXME ... right now we're just sending a bounce; we really want to
 921          * include the text of the bounced message.
 922          */
 923         if (msg->cm_fields['M'] != NULL) {
 924                 phree(msg->cm_fields['M']);
 925         }
 926         msg->cm_fields['M'] = strdoop(reason);
 927         msg->cm_format_type = 0;
 928
 929         /*
 930          * Turn the message around
 931          */
 932         if (msg->cm_fields['R'] == NULL) {
 933                 phree(msg->cm_fields['R']);
 934         }
 935
 936         if (msg->cm_fields['D'] == NULL) {
 937                 phree(msg->cm_fields['D']);
 938         }
 939
 940         snprintf(recipient, sizeof recipient, "%s@%s",
 941                 msg->cm_fields['A'], msg->cm_fields['N']);
 942
 943         if (msg->cm_fields['A'] == NULL) {
 944                 phree(msg->cm_fields['A']);
 945         }
 946
 947         if (msg->cm_fields['N'] == NULL) {
 948                 phree(msg->cm_fields['N']);
 949         }
 950
 951         msg->cm_fields['A'] = strdoop(BOUNCESOURCE);
 952         msg->cm_fields['N'] = strdoop(config.c_nodename);
 953
 954
 955         /* prepend our node to the path */
 956         if (msg->cm_fields['P'] != NULL) {
 957                 oldpath = msg->cm_fields['P'];
 958                 msg->cm_fields['P'] = NULL;
 959         }
 960         else {
 961                 oldpath = strdoop("unknown_user");
 962         }
 963         size = strlen(oldpath) + SIZ;
 964         msg->cm_fields['P'] = mallok(size);
 965         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
 966         phree(oldpath);
 967
 968         /* Now submit the message */
 969         valid = validate_recipients(recipient);
 970         if (valid != NULL) if (valid->num_error > 0) {
 971                 phree(valid);
 972                 valid = NULL;
 973         }
 974         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 975                 strcpy(force_room, config.c_aideroom);
 976         }
 977         else {
 978                 strcpy(force_room, "");
 979         }
 980         if ( (valid == NULL) && (strlen(force_room) == 0) ) {
 981                 strcpy(force_room, config.c_aideroom);
 982         }
 983         CtdlSubmitMsg(msg, valid, force_room);
 984
 985         /* Clean up */
 986         if (valid != NULL) phree(valid);
 987         CtdlFreeMessage(msg);
 988         lprintf(9, "leaving network_bounce()\n");
 989 }
 990
 991
 992
 993
 994 /*
 995  * Process a buffer containing a single message from a single file
 996  * from the inbound queue
 997  */
 998 void network_process_buffer(char *buffer, long size) {
 999         struct CtdlMessage *msg;
1000         long pos;
1001         int field;
1002         struct recptypes *recp = NULL;
1003         char target_room[ROOMNAMELEN];
1004         struct ser_ret sermsg;
1005         char *oldpath = NULL;
1006         char filename[SIZ];
1007         FILE *fp;
1008         char buf[SIZ];
1009
1010         /* Set default target room to trash */
1011         strcpy(target_room, TWITROOM);
1012
1013         /* Load the message into memory */
1014         msg = (struct CtdlMessage *) mallok(sizeof(struct CtdlMessage));
1015         memset(msg, 0, sizeof(struct CtdlMessage));
1016         msg->cm_magic = CTDLMESSAGE_MAGIC;
1017         msg->cm_anon_type = buffer[1];
1018         msg->cm_format_type = buffer[2];
1019
1020         for (pos = 3; pos < size; ++pos) {
1021                 field = buffer[pos];
1022                 msg->cm_fields[field] = strdoop(&buffer[pos+1]);
1023                 pos = pos + strlen(&buffer[(int)pos]);
1024         }
1025
1026         /* Check for message routing */
1027         if (msg->cm_fields['D'] != NULL) {
1028                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1029
1030                         /* route the message */
1031                         if (is_valid_node(NULL, NULL,
1032                            msg->cm_fields['D']) == 0) {
1033
1034                                 /* prepend our node to the path */
1035                                 if (msg->cm_fields['P'] != NULL) {
1036                                         oldpath = msg->cm_fields['P'];
1037                                         msg->cm_fields['P'] = NULL;
1038                                 }
1039                                 else {
1040                                         oldpath = strdoop("unknown_user");
1041                                 }
1042                                 size = strlen(oldpath) + SIZ;
1043                                 msg->cm_fields['P'] = mallok(size);
1044                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1045                                         config.c_nodename, oldpath);
1046                                 phree(oldpath);
1047
1048                                 /* serialize the message */
1049                                 serialize_message(&sermsg, msg);
1050
1051                                 /* now send it */
1052                                 snprintf(filename, sizeof filename,
1053                                         "./network/spoolout/%s",
1054                                         msg->cm_fields['D']);
1055                                 fp = fopen(filename, "ab");
1056                                 if (fp != NULL) {
1057                                         fwrite(sermsg.ser,
1058                                                 sermsg.len, 1, fp);
1059                                         fclose(fp);
1060                                 }
1061                                 phree(sermsg.ser);
1062                                 CtdlFreeMessage(msg);
1063                                 return;
1064                         }
1065
1066                         else {  /* invalid destination node name */
1067
1068                                 network_bounce(msg,
1069 "A message you sent could not be delivered due to an invalid destination node"
1070 " name.  Please check the address and try sending the message again.\n");
1071                                 msg = NULL;
1072                                 return;
1073
1074                         }
1075                 }
1076         }
1077
1078         /*
1079          * Check to see if we already have a copy of this message
1080          */
1081         if (network_usetable(msg) != 0) {
1082                 snprintf(buf, sizeof buf,
1083                         "Loopzapper rejected message <%s> "
1084                         "from <%s> in <%s> @ <%s>\n",
1085                         ((msg->cm_fields['I']!=NULL)?(msg->cm_fields['I']):""),
1086                         ((msg->cm_fields['A']!=NULL)?(msg->cm_fields['A']):""),
1087                         ((msg->cm_fields['O']!=NULL)?(msg->cm_fields['O']):""),
1088                         ((msg->cm_fields['N']!=NULL)?(msg->cm_fields['N']):"")
1089                 );
1090                 aide_message(buf);
1091                 CtdlFreeMessage(msg);
1092                 msg = NULL;
1093                 return;
1094         }
1095
1096         /* Learn network topology from the path */
1097         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1098                 network_learn_topology(msg->cm_fields['N'],
1099                                         msg->cm_fields['P']);
1100         }
1101
1102         /* Does it have a recipient?  If so, validate it... */
1103         if (msg->cm_fields['R'] != NULL) {
1104                 recp = validate_recipients(msg->cm_fields['R']);
1105                 if (recp != NULL) if (recp->num_error > 0) {
1106                         network_bounce(msg,
1107 "A message you sent could not be delivered due to an invalid address.\n"
1108 "Please check the address and try sending the message again.\n");
1109                         msg = NULL;
1110                         phree(recp);
1111                         return;
1112                 }
1113                 strcpy(target_room, "");        /* no target room if mail */
1114         }
1115
1116         else if (msg->cm_fields['C'] != NULL) {
1117                 safestrncpy(target_room,
1118                         msg->cm_fields['C'],
1119                         sizeof target_room);
1120         }
1121
1122         else if (msg->cm_fields['O'] != NULL) {
1123                 safestrncpy(target_room,
1124                         msg->cm_fields['O'],
1125                         sizeof target_room);
1126         }
1127
1128         /* Strip out fields that are only relevant during transit */
1129         if (msg->cm_fields['D'] != NULL) {
1130                 phree(msg->cm_fields['D']);
1131                 msg->cm_fields['D'] = NULL;
1132         }
1133         if (msg->cm_fields['C'] != NULL) {
1134                 phree(msg->cm_fields['C']);
1135                 msg->cm_fields['C'] = NULL;
1136         }
1137
1138         /* save the message into a room */
1139         if (PerformNetprocHooks(msg, target_room) == 0) {
1140                 msg->cm_flags = CM_SKIP_HOOKS;
1141                 CtdlSubmitMsg(msg, recp, target_room);
1142         }
1143         CtdlFreeMessage(msg);
1144         phree(recp);
1145 }
1146
1147
1148 /*
1149  * Process a single message from a single file from the inbound queue
1150  */
1151 void network_process_message(FILE *fp, long msgstart, long msgend) {
1152         long hold_pos;
1153         long size;
1154         char *buffer;
1155
1156         hold_pos = ftell(fp);
1157         size = msgend - msgstart + 1;
1158         buffer = mallok(size);
1159         if (buffer != NULL) {
1160                 fseek(fp, msgstart, SEEK_SET);
1161                 fread(buffer, size, 1, fp);
1162                 network_process_buffer(buffer, size);
1163                 phree(buffer);
1164         }
1165
1166         fseek(fp, hold_pos, SEEK_SET);
1167 }
1168
1169
1170 /*
1171  * Process a single file from the inbound queue
1172  */
1173 void network_process_file(char *filename) {
1174         FILE *fp;
1175         long msgstart = (-1L);
1176         long msgend = (-1L);
1177         long msgcur = 0L;
1178         int ch;
1179
1180         lprintf(7, "network: processing <%s>\n", filename);
1181
1182         fp = fopen(filename, "rb");
1183         if (fp == NULL) {
1184                 lprintf(5, "Error opening %s: %s\n",
1185                         filename, strerror(errno));
1186                 return;
1187         }
1188
1189         /* Look for messages in the data stream and break them out */
1190         while (ch = getc(fp), ch >= 0) {
1191
1192                 if (ch == 255) {
1193                         if (msgstart >= 0L) {
1194                                 msgend = msgcur - 1;
1195                                 network_process_message(fp, msgstart, msgend);
1196                         }
1197                         msgstart = msgcur;
1198                 }
1199
1200                 ++msgcur;
1201         }
1202
1203         msgend = msgcur - 1;
1204         if (msgstart >= 0L) {
1205                 network_process_message(fp, msgstart, msgend);
1206         }
1207
1208         fclose(fp);
1209         unlink(filename);
1210 }
1211
1212
1213 /*
1214  * Process anything in the inbound queue
1215  */
1216 void network_do_spoolin(void) {
1217         DIR *dp;
1218         struct dirent *d;
1219         char filename[SIZ];
1220
1221         dp = opendir("./network/spoolin");
1222         if (dp == NULL) return;
1223
1224         while (d = readdir(dp), d != NULL) {
1225                 snprintf(filename, sizeof filename, "./network/spoolin/%s", d->d_name);
1226                 network_process_file(filename);
1227         }
1228
1229
1230         closedir(dp);
1231 }
1232
1233
1234
1235
1236
1237 /*
1238  * receive network spool from the remote system
1239  */
1240 void receive_spool(int sock, char *remote_nodename) {
1241         long download_len;
1242         long bytes_received;
1243         char buf[SIZ];
1244         static char pbuf[IGNET_PACKET_SIZE];
1245         char tempfilename[PATH_MAX];
1246         long plen;
1247         FILE *fp;
1248
1249         strcpy(tempfilename, tmpnam(NULL));
1250         if (sock_puts(sock, "NDOP") < 0) return;
1251         if (sock_gets(sock, buf) < 0) return;
1252         lprintf(9, "<%s\n", buf);
1253         if (buf[0] != '2') {
1254                 return;
1255         }
1256         download_len = extract_long(&buf[4], 0);
1257
1258         bytes_received = 0L;
1259         fp = fopen(tempfilename, "w");
1260         if (fp == NULL) {
1261                 lprintf(9, "cannot open download file locally: %s\n",
1262                         strerror(errno));
1263                 return;
1264         }
1265
1266         while (bytes_received < download_len) {
1267                 snprintf(buf, sizeof buf, "READ %ld|%ld",
1268                         bytes_received,
1269                      ((download_len - bytes_received > IGNET_PACKET_SIZE)
1270                  ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1271                 if (sock_puts(sock, buf) < 0) {
1272                         fclose(fp);
1273                         unlink(tempfilename);
1274                         return;
1275                 }
1276                 if (sock_gets(sock, buf) < 0) {
1277                         fclose(fp);
1278                         unlink(tempfilename);
1279                         return;
1280                 }
1281                 if (buf[0] == '6') {
1282                         plen = extract_long(&buf[4], 0);
1283                         if (sock_read(sock, pbuf, plen) < 0) {
1284                                 fclose(fp);
1285                                 unlink(tempfilename);
1286                                 return;
1287                         }
1288                         fwrite((char *) pbuf, plen, 1, fp);
1289                         bytes_received = bytes_received + plen;
1290                 }
1291         }
1292
1293         fclose(fp);
1294         if (sock_puts(sock, "CLOS") < 0) {
1295                 unlink(tempfilename);
1296                 return;
1297         }
1298         if (sock_gets(sock, buf) < 0) {
1299                 unlink(tempfilename);
1300                 return;
1301         }
1302         lprintf(9, "%s\n", buf);
1303         snprintf(buf, sizeof buf, "mv %s ./network/spoolin/%s.%ld",
1304                 tempfilename, remote_nodename, (long) getpid());
1305         system(buf);
1306 }
1307
1308
1309
1310 /*
1311  * transmit network spool to the remote system
1312  */
1313 void transmit_spool(int sock, char *remote_nodename)
1314 {
1315         char buf[SIZ];
1316         char pbuf[4096];
1317         long plen;
1318         long bytes_to_write, thisblock;
1319         int fd;
1320         char sfname[128];
1321
1322         if (sock_puts(sock, "NUOP") < 0) return;
1323         if (sock_gets(sock, buf) < 0) return;
1324         lprintf(9, "<%s\n", buf);
1325         if (buf[0] != '2') {
1326                 return;
1327         }
1328
1329         snprintf(sfname, sizeof sfname, "./network/spoolout/%s", remote_nodename);
1330         fd = open(sfname, O_RDONLY);
1331         if (fd < 0) {
1332                 if (errno == ENOENT) {
1333                         lprintf(9, "Nothing to send.\n");
1334                 } else {
1335                         lprintf(5, "cannot open upload file locally: %s\n",
1336                                 strerror(errno));
1337                 }
1338                 return;
1339         }
1340         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
1341                 bytes_to_write = plen;
1342                 while (bytes_to_write > 0L) {
1343                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
1344                         if (sock_puts(sock, buf) < 0) {
1345                                 close(fd);
1346                                 return;
1347                         }
1348                         if (sock_gets(sock, buf) < 0) {
1349                                 close(fd);
1350                                 return;
1351                         }
1352                         thisblock = atol(&buf[4]);
1353                         if (buf[0] == '7') {
1354                                 if (sock_write(sock, pbuf,
1355                                    (int) thisblock) < 0) {
1356                                         close(fd);
1357                                         return;
1358                                 }
1359                                 bytes_to_write = bytes_to_write - thisblock;
1360                         } else {
1361                                 goto ABORTUPL;
1362                         }
1363                 }
1364         }
1365
1366 ABORTUPL:
1367         close(fd);
1368         if (sock_puts(sock, "UCLS 1") < 0) return;
1369         if (sock_gets(sock, buf) < 0) return;
1370         lprintf(9, "<%s\n", buf);
1371         if (buf[0] == '2') {
1372                 unlink(sfname);
1373         }
1374 }
1375
1376
1377
1378 /*
1379  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
1380  */
1381 void network_poll_node(char *node, char *secret, char *host, char *port) {
1382         int sock;
1383         char buf[SIZ];
1384
1385         if (network_talking_to(node, NTT_CHECK)) return;
1386         network_talking_to(node, NTT_ADD);
1387         lprintf(5, "Polling node <%s> at %s:%s\n", node, host, port);
1388
1389         sock = sock_connect(host, port, "tcp");
1390         if (sock < 0) {
1391                 lprintf(7, "Could not connect: %s\n", strerror(errno));
1392                 network_talking_to(node, NTT_REMOVE);
1393                 return;
1394         }
1395
1396         lprintf(9, "Connected!\n");
1397
1398         /* Read the server greeting */
1399         if (sock_gets(sock, buf) < 0) goto bail;
1400         lprintf(9, ">%s\n", buf);
1401
1402         /* Identify ourselves */
1403         snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
1404         lprintf(9, "<%s\n", buf);
1405         if (sock_puts(sock, buf) <0) goto bail;
1406         if (sock_gets(sock, buf) < 0) goto bail;
1407         lprintf(9, ">%s\n", buf);
1408         if (buf[0] != '2') goto bail;
1409
1410         /* At this point we are authenticated. */
1411         receive_spool(sock, node);
1412         transmit_spool(sock, node);
1413
1414         sock_puts(sock, "QUIT");
1415 bail:   sock_close(sock);
1416         network_talking_to(node, NTT_REMOVE);
1417 }
1418
1419
1420
1421 /*
1422  * Poll other Citadel nodes and transfer inbound/outbound network data.
1423  */
1424 void network_poll_other_citadel_nodes(void) {
1425         char *ignetcfg = NULL;
1426         int i;
1427         char linebuf[SIZ];
1428         char node[SIZ];
1429         char host[SIZ];
1430         char port[SIZ];
1431         char secret[SIZ];
1432
1433         ignetcfg = CtdlGetSysConfig(IGNETCFG);
1434         if (ignetcfg == NULL) return;   /* no nodes defined */
1435
1436         /* Use the string tokenizer to grab one line at a time */
1437         for (i=0; i<num_tokens(ignetcfg, '\n'); ++i) {
1438                 extract_token(linebuf, ignetcfg, i, '\n');
1439                 extract(node, linebuf, 0);
1440                 extract(secret, linebuf, 1);
1441                 extract(host, linebuf, 2);
1442                 extract(port, linebuf, 3);
1443                 if ( (strlen(node) > 0) && (strlen(secret) > 0)
1444                    && (strlen(host) > 0) && strlen(port) > 0) {
1445                         network_poll_node(node, secret, host, port);
1446                 }
1447         }
1448
1449         phree(ignetcfg);
1450 }
1451
1452
1453
1454
1455
1456
1457
1458 /*
1459  * network_do_queue()
1460  *
1461  * Run through the rooms doing various types of network stuff.
1462  */
1463 void network_do_queue(void) {
1464         static time_t last_run = 0L;
1465         struct RoomProcList *ptr;
1466
1467         /*
1468          * Run no more frequently than once every n seconds
1469          */
1470         if ( (time(NULL) - last_run) < config.c_net_freq ) return;
1471
1472         /*
1473          * This is a simple concurrency check to make sure only one queue run
1474          * is done at a time.  We could do this with a mutex, but since we
1475          * don't really require extremely fine granularity here, we'll do it
1476          * with a static variable instead.
1477          */
1478         if (doing_queue) return;
1479         doing_queue = 1;
1480         last_run = time(NULL);
1481
1482         /*
1483          * Poll other Citadel nodes.
1484          */
1485         network_poll_other_citadel_nodes();
1486
1487         /*
1488          * Load the network map and filter list into memory.
1489          */
1490         read_network_map();
1491         filterlist = load_filter_list();
1492
1493         /*
1494          * Go ahead and run the queue
1495          */
1496         lprintf(7, "network: loading outbound queue\n");
1497         ForEachRoom(network_queue_room, NULL);
1498
1499         lprintf(7, "network: running outbound queue\n");
1500         while (rplist != NULL) {
1501                 network_spoolout_room(rplist->name);
1502                 ptr = rplist;
1503                 rplist = rplist->next;
1504                 phree(ptr);
1505         }
1506
1507         lprintf(7, "network: processing inbound queue\n");
1508         network_do_spoolin();
1509
1510         /* Save the network map back to disk */
1511         write_network_map();
1512
1513         /* Free the filter list in memory */
1514         free_filter_list(filterlist);
1515         filterlist = NULL;
1516
1517         lprintf(7, "network: queue run completed\n");
1518         doing_queue = 0;
1519 }
1520
1521
1522 /*
1523  * cmd_netp() - authenticate to the server as another Citadel node polling
1524  *              for network traffic
1525  */
1526 void cmd_netp(char *cmdbuf)
1527 {
1528         char node[SIZ];
1529         char pass[SIZ];
1530
1531         char secret[SIZ];
1532         char nexthop[SIZ];
1533
1534         if (doing_queue) {
1535                 cprintf("%d spooling - try again in a few minutes\n", ERROR);
1536                 return;
1537         }
1538
1539         extract(node, cmdbuf, 0);
1540         extract(pass, cmdbuf, 1);
1541
1542         if (is_valid_node(nexthop, secret, node) != 0) {
1543                 cprintf("%d authentication failed\n", ERROR);
1544                 return;
1545         }
1546
1547         if (strcasecmp(pass, secret)) {
1548                 cprintf("%d authentication failed\n", ERROR);
1549                 return;
1550         }
1551
1552         if (network_talking_to(node, NTT_CHECK)) {
1553                 cprintf("%d Already talking to %s right now\n", ERROR, node);
1554                 return;
1555         }
1556
1557         safestrncpy(CC->net_node, node, sizeof CC->net_node);
1558         network_talking_to(node, NTT_ADD);
1559         cprintf("%d authenticated as network node '%s'\n", CIT_OK,
1560                 CC->net_node);
1561 }
1562
1563
1564
1565
1566
1567 /*
1568  * Module entry point
1569  */
1570 char *serv_network_init(void)
1571 {
1572         CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1573         CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1574         CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1575         CtdlRegisterSessionHook(network_do_queue, EVT_TIMER);
1576         return "$Id$";
1577 }