citadel/modules/network/serv_network.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2010 by the citadel.org team
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  22  * This is a fairly high-level type of critical section.  It ensures that no
  23  * two threads work on the netconfigs files at the same time.  Since we do
  24  * so many things inside these, here are the rules:
  25  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  26  *  2. Do *not* perform any I/O with the client during these sections.
  27  *
  28  */
  29
  30 /*
  31  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  32  * requests that have not been confirmed will be deleted.
  33  */
  34 #define EXP     259200  /* three days */
  35
  36 #include "sysdep.h"
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39 #include <stdio.h>
  40 #include <fcntl.h>
  41 #include <ctype.h>
  42 #include <signal.h>
  43 #include <pwd.h>
  44 #include <errno.h>
  45 #include <sys/stat.h>
  46 #include <sys/types.h>
  47 #include <dirent.h>
  48 #if TIME_WITH_SYS_TIME
  49 # include <sys/time.h>
  50 # include <time.h>
  51 #else
  52 # if HAVE_SYS_TIME_H
  53 #  include <sys/time.h>
  54 # else
  55 #  include <time.h>
  56 # endif
  57 #endif
  58 #ifdef HAVE_SYSCALL_H
  59 # include <syscall.h>
  60 #else
  61 # if HAVE_SYS_SYSCALL_H
  62 #  include <sys/syscall.h>
  63 # endif
  64 #endif
  65
  66 #include <sys/wait.h>
  67 #include <string.h>
  68 #include <limits.h>
  69 #include <libcitadel.h>
  70 #include "citadel.h"
  71 #include "server.h"
  72 #include "citserver.h"
  73 #include "support.h"
  74 #include "config.h"
  75 #include "user_ops.h"
  76 #include "database.h"
  77 #include "msgbase.h"
  78 #include "internet_addressing.h"
  79 #include "serv_network.h"
  80 #include "clientsocket.h"
  81 #include "file_ops.h"
  82 #include "citadel_dirs.h"
  83 #include "threads.h"
  84
  85 #ifndef HAVE_SNPRINTF
  86 #include "snprintf.h"
  87 #endif
  88
  89 #include "context.h"
  90
  91 #include "ctdl_module.h"
  92
  93
  94
  95 /* Nonzero while we are doing network processing */
  96 static int doing_queue = 0;
  97
  98 /*
  99  * When we do network processing, it's accomplished in two passes; one to
 100  * gather a list of rooms and one to actually do them.  It's ok that rplist
 101  * is global; we have a mutex that keeps it safe.
 102  */
 103 struct RoomProcList *rplist = NULL;
 104
 105 /*
 106  * We build a map of network nodes during processing.
 107  */
 108 NetMap *the_netmap = NULL;
 109 int netmap_changed = 0;
 110 char *working_ignetcfg = NULL;
 111
 112 /*
 113  * Load or refresh the Citadel network (IGnet) configuration for this node.
 114  */
 115 void load_working_ignetcfg(void) {
 116         char *cfg;
 117         char *oldcfg;
 118
 119         cfg = CtdlGetSysConfig(IGNETCFG);
 120         if (cfg == NULL) {
 121                 cfg = strdup("");
 122         }
 123
 124         oldcfg = working_ignetcfg;
 125         working_ignetcfg = cfg;
 126         if (oldcfg != NULL) {
 127                 free(oldcfg);
 128         }
 129 }
 130
 131
 132
 133
 134
 135 /*
 136  * Keep track of what messages to reject
 137  */
 138 FilterList *load_filter_list(void) {
 139         char *serialized_list = NULL;
 140         int i;
 141         char buf[SIZ];
 142         FilterList *newlist = NULL;
 143         FilterList *nptr;
 144
 145         serialized_list = CtdlGetSysConfig(FILTERLIST);
 146         if (serialized_list == NULL) return(NULL); /* if null, no entries */
 147
 148         /* Use the string tokenizer to grab one line at a time */
 149         for (i=0; i<num_tokens(serialized_list, '\n'); ++i) {
 150                 extract_token(buf, serialized_list, i, '\n', sizeof buf);
 151                 nptr = (FilterList *) malloc(sizeof(FilterList));
 152                 extract_token(nptr->fl_user, buf, 0, '|', sizeof nptr->fl_user);
 153                 striplt(nptr->fl_user);
 154                 extract_token(nptr->fl_room, buf, 1, '|', sizeof nptr->fl_room);
 155                 striplt(nptr->fl_room);
 156                 extract_token(nptr->fl_node, buf, 2, '|', sizeof nptr->fl_node);
 157                 striplt(nptr->fl_node);
 158
 159                 /* Cowardly refuse to add an any/any/any entry that would
 160                  * end up filtering every single message.
 161                  */
 162                 if (IsEmptyStr(nptr->fl_user) &&
 163                     IsEmptyStr(nptr->fl_room) &&
 164                     IsEmptyStr(nptr->fl_node)) {
 165                         free(nptr);
 166                 }
 167                 else {
 168                         nptr->next = newlist;
 169                         newlist = nptr;
 170                 }
 171         }
 172
 173         free(serialized_list);
 174         return newlist;
 175 }
 176
 177
 178 void free_filter_list(FilterList *fl) {
 179         if (fl == NULL) return;
 180         free_filter_list(fl->next);
 181         free(fl);
 182 }
 183
 184
 185
 186 /*
 187  * Check the use table.  This is a list of messages which have recently
 188  * arrived on the system.  It is maintained and queried to prevent the same
 189  * message from being entered into the database multiple times if it happens
 190  * to arrive multiple times by accident.
 191  */
 192 int network_usetable(struct CtdlMessage *msg) {
 193
 194         char msgid[SIZ];
 195         struct cdbdata *cdbut;
 196         struct UseTable ut;
 197
 198         /* Bail out if we can't generate a message ID */
 199         if (msg == NULL) {
 200                 return(0);
 201         }
 202         if (msg->cm_fields['I'] == NULL) {
 203                 return(0);
 204         }
 205         if (IsEmptyStr(msg->cm_fields['I'])) {
 206                 return(0);
 207         }
 208
 209         /* Generate the message ID */
 210         strcpy(msgid, msg->cm_fields['I']);
 211         if (haschar(msgid, '@') == 0) {
 212                 strcat(msgid, "@");
 213                 if (msg->cm_fields['N'] != NULL) {
 214                         strcat(msgid, msg->cm_fields['N']);
 215                 }
 216                 else {
 217                         return(0);
 218                 }
 219         }
 220
 221         cdbut = cdb_fetch(CDB_USETABLE, msgid, strlen(msgid));
 222         if (cdbut != NULL) {
 223                 cdb_free(cdbut);
 224                 CtdlLogPrintf(CTDL_DEBUG, "network_usetable() : we already have %s\n", msgid);
 225                 return(1);
 226         }
 227
 228         /* If we got to this point, it's unique: add it. */
 229         strcpy(ut.ut_msgid, msgid);
 230         ut.ut_timestamp = time(NULL);
 231         cdb_store(CDB_USETABLE, msgid, strlen(msgid), &ut, sizeof(struct UseTable) );
 232         return(0);
 233 }
 234
 235
 236 /*
 237  * Read the network map from its configuration file into memory.
 238  */
 239 void read_network_map(void) {
 240         char *serialized_map = NULL;
 241         int i;
 242         char buf[SIZ];
 243         NetMap *nmptr;
 244
 245         serialized_map = CtdlGetSysConfig(IGNETMAP);
 246         if (serialized_map == NULL) return;     /* if null, no entries */
 247
 248         /* Use the string tokenizer to grab one line at a time */
 249         for (i=0; i<num_tokens(serialized_map, '\n'); ++i) {
 250                 extract_token(buf, serialized_map, i, '\n', sizeof buf);
 251                 nmptr = (NetMap *) malloc(sizeof(NetMap));
 252                 extract_token(nmptr->nodename, buf, 0, '|', sizeof nmptr->nodename);
 253                 nmptr->lastcontact = extract_long(buf, 1);
 254                 extract_token(nmptr->nexthop, buf, 2, '|', sizeof nmptr->nexthop);
 255                 nmptr->next = the_netmap;
 256                 the_netmap = nmptr;
 257         }
 258
 259         free(serialized_map);
 260         netmap_changed = 0;
 261 }
 262
 263
 264 /*
 265  * Write the network map from memory back to the configuration file.
 266  */
 267 void write_network_map(void) {
 268         char *serialized_map = NULL;
 269         NetMap *nmptr;
 270
 271
 272         if (netmap_changed) {
 273                 serialized_map = strdup("");
 274
 275                 if (the_netmap != NULL) {
 276                         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 277                                 serialized_map = realloc(serialized_map,
 278                                                         (strlen(serialized_map)+SIZ) );
 279                                 if (!IsEmptyStr(nmptr->nodename)) {
 280                                         snprintf(&serialized_map[strlen(serialized_map)],
 281                                                 SIZ,
 282                                                 "%s|%ld|%s\n",
 283                                                 nmptr->nodename,
 284                                                 (long)nmptr->lastcontact,
 285                                                 nmptr->nexthop);
 286                                 }
 287                         }
 288                 }
 289
 290                 CtdlPutSysConfig(IGNETMAP, serialized_map);
 291                 free(serialized_map);
 292         }
 293
 294         /* Now free the list */
 295         while (the_netmap != NULL) {
 296                 nmptr = the_netmap->next;
 297                 free(the_netmap);
 298                 the_netmap = nmptr;
 299         }
 300         netmap_changed = 0;
 301 }
 302
 303
 304
 305 /*
 306  * Check the network map and determine whether the supplied node name is
 307  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 308  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 309  * shared secret.
 310  */
 311 int is_valid_node(char *nexthop, char *secret, char *node) {
 312         int i;
 313         char linebuf[SIZ];
 314         char buf[SIZ];
 315         int retval;
 316         NetMap *nmptr;
 317
 318         if (node == NULL) {
 319                 return(-1);
 320         }
 321
 322         /*
 323          * First try the neighbor nodes
 324          */
 325         if (working_ignetcfg == NULL) {
 326                 CtdlLogPrintf(CTDL_ERR, "working_ignetcfg is NULL!\n");
 327                 if (nexthop != NULL) {
 328                         strcpy(nexthop, "");
 329                 }
 330                 return(-1);
 331         }
 332
 333         retval = (-1);
 334         if (nexthop != NULL) {
 335                 strcpy(nexthop, "");
 336         }
 337
 338         /* Use the string tokenizer to grab one line at a time */
 339         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
 340                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
 341                 extract_token(buf, linebuf, 0, '|', sizeof buf);
 342                 if (!strcasecmp(buf, node)) {
 343                         if (nexthop != NULL) {
 344                                 strcpy(nexthop, "");
 345                         }
 346                         if (secret != NULL) {
 347                                 extract_token(secret, linebuf, 1, '|', 256);
 348                         }
 349                         retval = 0;
 350                 }
 351         }
 352
 353         if (retval == 0) {
 354                 return(retval);         /* yup, it's a direct neighbor */
 355         }
 356
 357         /*
 358          * If we get to this point we have to see if we know the next hop
 359          */
 360         if (the_netmap != NULL) {
 361                 for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
 362                         if (!strcasecmp(nmptr->nodename, node)) {
 363                                 if (nexthop != NULL) {
 364                                         strcpy(nexthop, nmptr->nexthop);
 365                                 }
 366                                 return(0);
 367                         }
 368                 }
 369         }
 370
 371         /*
 372          * If we get to this point, the supplied node name is bogus.
 373          */
 374         CtdlLogPrintf(CTDL_ERR, "Invalid node name <%s>\n", node);
 375         return(-1);
 376 }
 377
 378
 379
 380
 381
 382 void cmd_gnet(char *argbuf) {
 383         char filename[PATH_MAX];
 384         char buf[SIZ];
 385         FILE *fp;
 386
 387         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 388                 /* users can edit the netconfigs for their own mailbox rooms */
 389         }
 390         else if (CtdlAccessCheck(ac_room_aide)) return;
 391
 392         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 393         cprintf("%d Network settings for room #%ld <%s>\n",
 394                 LISTING_FOLLOWS,
 395                 CC->room.QRnumber, CC->room.QRname);
 396
 397         fp = fopen(filename, "r");
 398         if (fp != NULL) {
 399                 while (fgets(buf, sizeof buf, fp) != NULL) {
 400                         buf[strlen(buf)-1] = 0;
 401                         cprintf("%s\n", buf);
 402                 }
 403                 fclose(fp);
 404         }
 405
 406         cprintf("000\n");
 407 }
 408
 409
 410 void cmd_snet(char *argbuf) {
 411         char tempfilename[PATH_MAX];
 412         char filename[PATH_MAX];
 413         int TmpFD;
 414         StrBuf *Line;
 415         struct stat StatBuf;
 416         long len;
 417         int rc;
 418
 419         unbuffer_output();
 420
 421         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 422                 /* users can edit the netconfigs for their own mailbox rooms */
 423         }
 424         else if (CtdlAccessCheck(ac_room_aide)) return;
 425
 426         len = assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 427         memcpy(tempfilename, filename, len + 1);
 428
 429         memset(&StatBuf, 0, sizeof(struct stat));
 430         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 431                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 432
 433         sprintf(tempfilename + len, ".%d", CC->cs_pid);
 434         errno = 0;
 435         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 436
 437         if ((TmpFD > 0) && (errno == 0))
 438         {
 439                 char *tmp = malloc(StatBuf.st_size * 2);
 440                 memset(tmp, ' ', StatBuf.st_size * 2);
 441                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 442                 free(tmp);
 443                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 444                 {
 445                         close(TmpFD);
 446                         cprintf("%d Unable to allocate the space required for %s: %s\n",
 447                                 ERROR + INTERNAL_ERROR,
 448                                 tempfilename,
 449                                 strerror(errno));
 450                         unlink(tempfilename);
 451                         return;
 452                 }
 453                 lseek(TmpFD, SEEK_SET, 0);
 454         }
 455         else {
 456                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 457                         ERROR + INTERNAL_ERROR,
 458                         tempfilename,
 459                         strerror(errno));
 460                 unlink(tempfilename);
 461         }
 462         Line = NewStrBuf();
 463
 464         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 465
 466         len = 0;
 467         while (rc = CtdlClientGetLine(Line),
 468                (rc >= 0))
 469         {
 470                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 471                         break;
 472                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 473                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 474                 len += StrLength(Line);
 475         }
 476         FreeStrBuf(&Line);
 477         ftruncate(TmpFD, len);
 478         close(TmpFD);
 479
 480         /* Now copy the temp file to its permanent location.
 481          * (We copy instead of link because they may be on different filesystems)
 482          */
 483         begin_critical_section(S_NETCONFIGS);
 484         rename(tempfilename, filename);
 485         end_critical_section(S_NETCONFIGS);
 486 }
 487
 488
 489 /*
 490  * Deliver digest messages
 491  */
 492 void network_deliver_digest(SpoolControl *sc) {
 493         char buf[SIZ];
 494         int i;
 495         struct CtdlMessage *msg = NULL;
 496         long msglen;
 497         char *recps = NULL;
 498         size_t recps_len = SIZ;
 499         size_t siz;
 500         struct recptypes *valid;
 501         namelist *nptr;
 502         char bounce_to[256];
 503
 504         if (sc->num_msgs_spooled < 1) {
 505                 fclose(sc->digestfp);
 506                 sc->digestfp = NULL;
 507                 return;
 508         }
 509
 510         msg = malloc(sizeof(struct CtdlMessage));
 511         memset(msg, 0, sizeof(struct CtdlMessage));
 512         msg->cm_magic = CTDLMESSAGE_MAGIC;
 513         msg->cm_format_type = FMT_RFC822;
 514         msg->cm_anon_type = MES_NORMAL;
 515
 516         sprintf(buf, "%ld", time(NULL));
 517         msg->cm_fields['T'] = strdup(buf);
 518         msg->cm_fields['A'] = strdup(CC->room.QRname);
 519         snprintf(buf, sizeof buf, "[%s]", CC->room.QRname);
 520         msg->cm_fields['U'] = strdup(buf);
 521         sprintf(buf, "room_%s@%s", CC->room.QRname, config.c_fqdn);
 522         for (i=0; buf[i]; ++i) {
 523                 if (isspace(buf[i])) buf[i]='_';
 524                 buf[i] = tolower(buf[i]);
 525         }
 526         msg->cm_fields['F'] = strdup(buf);
 527         msg->cm_fields['R'] = strdup(buf);
 528
 529         /* Set the 'List-ID' header */
 530         msg->cm_fields['L'] = malloc(1024);
 531         snprintf(msg->cm_fields['L'], 1024,
 532                 "%s <%ld.list-id.%s>",
 533                 CC->room.QRname,
 534                 CC->room.QRnumber,
 535                 config.c_fqdn
 536         );
 537
 538         /*
 539          * Go fetch the contents of the digest
 540          */
 541         fseek(sc->digestfp, 0L, SEEK_END);
 542         msglen = ftell(sc->digestfp);
 543
 544         msg->cm_fields['M'] = malloc(msglen + 1);
 545         fseek(sc->digestfp, 0L, SEEK_SET);
 546         siz = fread(msg->cm_fields['M'], (size_t)msglen, 1, sc->digestfp);
 547         msg->cm_fields['M'][msglen] = '\0';
 548
 549         fclose(sc->digestfp);
 550         sc->digestfp = NULL;
 551
 552         /* Now generate the delivery instructions */
 553
 554         /*
 555          * Figure out how big a buffer we need to allocate
 556          */
 557         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 558                 recps_len = recps_len + strlen(nptr->name) + 2;
 559         }
 560
 561         recps = malloc(recps_len);
 562
 563         if (recps == NULL) {
 564                 CtdlLogPrintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 565                 abort();
 566         }
 567
 568         strcpy(recps, "");
 569
 570         /* Each recipient */
 571         for (nptr = sc->digestrecps; nptr != NULL; nptr = nptr->next) {
 572                 if (nptr != sc->digestrecps) {
 573                         strcat(recps, ",");
 574                 }
 575                 strcat(recps, nptr->name);
 576         }
 577
 578         /* Where do we want bounces and other noise to be heard?  Surely not the list members! */
 579         snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
 580
 581         /* Now submit the message */
 582         valid = validate_recipients(recps, NULL, 0);
 583         free(recps);
 584         if (valid != NULL) {
 585                 valid->bounce_to = strdup(bounce_to);
 586                 valid->envelope_from = strdup(bounce_to);
 587                 CtdlSubmitMsg(msg, valid, NULL, 0);
 588         }
 589         CtdlFreeMessage(msg);
 590         free_recipients(valid);
 591 }
 592
 593
 594 /*
 595  * Deliver list messages to everyone on the list ... efficiently
 596  */
 597 void network_deliver_list(struct CtdlMessage *msg, SpoolControl *sc) {
 598         char *recps = NULL;
 599         size_t recps_len = SIZ;
 600         struct recptypes *valid;
 601         namelist *nptr;
 602         char bounce_to[256];
 603
 604         /* Don't do this if there were no recipients! */
 605         if (sc->listrecps == NULL) return;
 606
 607         /* Now generate the delivery instructions */
 608
 609         /*
 610          * Figure out how big a buffer we need to allocate
 611          */
 612         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 613                 recps_len = recps_len + strlen(nptr->name) + 2;
 614         }
 615
 616         recps = malloc(recps_len);
 617
 618         if (recps == NULL) {
 619                 CtdlLogPrintf(CTDL_EMERG, "Cannot allocate %ld bytes for recps...\n", (long)recps_len);
 620                 abort();
 621         }
 622
 623         strcpy(recps, "");
 624
 625         /* Each recipient */
 626         for (nptr = sc->listrecps; nptr != NULL; nptr = nptr->next) {
 627                 if (nptr != sc->listrecps) {
 628                         strcat(recps, ",");
 629                 }
 630                 strcat(recps, nptr->name);
 631         }
 632
 633         /* Where do we want bounces and other noise to be heard?  Surely not the list members! */
 634         snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", config.c_fqdn);
 635
 636         /* Now submit the message */
 637         valid = validate_recipients(recps, NULL, 0);
 638         free(recps);
 639         if (valid != NULL) {
 640                 valid->bounce_to = strdup(bounce_to);
 641                 valid->envelope_from = strdup(bounce_to);
 642                 CtdlSubmitMsg(msg, valid, NULL, 0);
 643                 free_recipients(valid);
 644         }
 645         /* Do not call CtdlFreeMessage(msg) here; the caller will free it. */
 646 }
 647
 648
 649
 650
 651 /*
 652  * Spools out one message from the list.
 653  */
 654 void network_spool_msg(long msgnum, void *userdata) {
 655         SpoolControl *sc;
 656         int i;
 657         char *newpath = NULL;
 658         size_t instr_len = SIZ;
 659         struct CtdlMessage *msg = NULL;
 660         namelist *nptr;
 661         maplist *mptr;
 662         struct ser_ret sermsg;
 663         FILE *fp;
 664         char filename[PATH_MAX];
 665         char buf[SIZ];
 666         int bang = 0;
 667         int send = 1;
 668         int delete_after_send = 0;      /* Set to 1 to delete after spooling */
 669         int ok_to_participate = 0;
 670         struct recptypes *valid;
 671
 672         sc = (SpoolControl *)userdata;
 673
 674         /*
 675          * Process mailing list recipients
 676          */
 677         instr_len = SIZ;
 678         if (sc->listrecps != NULL) {
 679                 /* Fetch the message.  We're going to need to modify it
 680                  * in order to insert the [list name] in it, etc.
 681                  */
 682                 msg = CtdlFetchMessage(msgnum, 1);
 683                 if (msg != NULL) {
 684                         if (msg->cm_fields['V'] == NULL){
 685                                 /* local message, no enVelope */
 686                                 StrBuf *Buf;
 687                                 Buf = NewStrBuf();
 688                                 StrBufAppendBufPlain(Buf, msg->cm_fields['O'], -1, 0);
 689                                 StrBufAppendBufPlain(Buf, HKEY("@"), 0);
 690                                 StrBufAppendBufPlain(Buf, config.c_fqdn, -1, 0);
 691
 692                                 msg->cm_fields['K'] = SmashStrBuf(&Buf);
 693                         }
 694                         else {
 695                                 msg->cm_fields['K'] = strdup (msg->cm_fields['V']);
 696                         }
 697                         /* Set the 'List-ID' header */
 698                         if (msg->cm_fields['L'] != NULL) {
 699                                 free(msg->cm_fields['L']);
 700                         }
 701                         msg->cm_fields['L'] = malloc(1024);
 702                         snprintf(msg->cm_fields['L'], 1024,
 703                                 "%s <%ld.list-id.%s>",
 704                                 CC->room.QRname,
 705                                 CC->room.QRnumber,
 706                                 config.c_fqdn
 707                         );
 708
 709                         /* Prepend "[List name]" to the subject */
 710                         if (msg->cm_fields['U'] == NULL) {
 711                                 msg->cm_fields['U'] = strdup("(no subject)");
 712                         }
 713                         snprintf(buf, sizeof buf, "[%s] %s", CC->room.QRname, msg->cm_fields['U']);
 714                         free(msg->cm_fields['U']);
 715                         msg->cm_fields['U'] = strdup(buf);
 716
 717                         /* Set the recipient of the list message to the
 718                          * email address of the room itself.
 719                          * FIXME ... I want to be able to pick any address
 720                          */
 721                         if (msg->cm_fields['R'] != NULL) {
 722                                 free(msg->cm_fields['R']);
 723                         }
 724                         msg->cm_fields['R'] = malloc(256);
 725                         snprintf(msg->cm_fields['R'], 256,
 726                                 "room_%s@%s", CC->room.QRname,
 727                                 config.c_fqdn);
 728                         for (i=0; msg->cm_fields['R'][i]; ++i) {
 729                                 if (isspace(msg->cm_fields['R'][i])) {
 730                                         msg->cm_fields['R'][i] = '_';
 731                                 }
 732                         }
 733
 734                         /* Handle delivery */
 735                         network_deliver_list(msg, sc);
 736                         CtdlFreeMessage(msg);
 737                 }
 738         }
 739
 740         /*
 741          * Process digest recipients
 742          */
 743         if ((sc->digestrecps != NULL) && (sc->digestfp != NULL)) {
 744                 msg = CtdlFetchMessage(msgnum, 1);
 745                 if (msg != NULL) {
 746                         fprintf(sc->digestfp,   " -----------------------------------"
 747                                                 "------------------------------------"
 748                                                 "-------\n");
 749                         fprintf(sc->digestfp, "From: ");
 750                         if (msg->cm_fields['A'] != NULL) {
 751                                 fprintf(sc->digestfp, "%s ", msg->cm_fields['A']);
 752                         }
 753                         if (msg->cm_fields['F'] != NULL) {
 754                                 fprintf(sc->digestfp, "<%s> ", msg->cm_fields['F']);
 755                         }
 756                         else if (msg->cm_fields['N'] != NULL) {
 757                                 fprintf(sc->digestfp, "@%s ", msg->cm_fields['N']);
 758                         }
 759                         fprintf(sc->digestfp, "\n");
 760                         if (msg->cm_fields['U'] != NULL) {
 761                                 fprintf(sc->digestfp, "Subject: %s\n", msg->cm_fields['U']);
 762                         }
 763
 764                         CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
 765
 766                         safestrncpy(CC->preferred_formats, "text/plain", sizeof CC->preferred_formats);
 767                         CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
 768
 769                         StrBufTrim(CC->redirect_buffer);
 770                         fwrite(HKEY("\n"), 1, sc->digestfp);
 771                         fwrite(SKEY(CC->redirect_buffer), 1, sc->digestfp);
 772                         fwrite(HKEY("\n"), 1, sc->digestfp);
 773
 774                         FreeStrBuf(&CC->redirect_buffer);
 775
 776                         sc->num_msgs_spooled += 1;
 777                         free(msg);
 778                 }
 779         }
 780
 781         /*
 782          * Process client-side list participations for this room
 783          */
 784         instr_len = SIZ;
 785         if (sc->participates != NULL) {
 786                 msg = CtdlFetchMessage(msgnum, 1);
 787                 if (msg != NULL) {
 788
 789                         /* Only send messages which originated on our own Citadel
 790                          * network, otherwise we'll end up sending the remote
 791                          * mailing list's messages back to it, which is rude...
 792                          */
 793                         ok_to_participate = 0;
 794                         if (msg->cm_fields['N'] != NULL) {
 795                                 if (!strcasecmp(msg->cm_fields['N'], config.c_nodename)) {
 796                                         ok_to_participate = 1;
 797                                 }
 798                                 if (is_valid_node(NULL, NULL, msg->cm_fields['N']) == 0) {
 799                                         ok_to_participate = 1;
 800                                 }
 801                         }
 802                         if (ok_to_participate) {
 803                                 if (msg->cm_fields['F'] != NULL) {
 804                                         free(msg->cm_fields['F']);
 805                                 }
 806                                 msg->cm_fields['F'] = malloc(SIZ);
 807                                 /* Replace the Internet email address of the actual
 808                                 * author with the email address of the room itself,
 809                                 * so the remote listserv doesn't reject us.
 810                                 * FIXME ... I want to be able to pick any address
 811                                 */
 812                                 snprintf(msg->cm_fields['F'], SIZ,
 813                                         "room_%s@%s", CC->room.QRname,
 814                                         config.c_fqdn);
 815                                 for (i=0; msg->cm_fields['F'][i]; ++i) {
 816                                         if (isspace(msg->cm_fields['F'][i])) {
 817                                                 msg->cm_fields['F'][i] = '_';
 818                                         }
 819                                 }
 820
 821                                 /*
 822                                  * Figure out how big a buffer we need to allocate
 823                                  */
 824                                 for (nptr = sc->participates; nptr != NULL; nptr = nptr->next) {
 825
 826                                         if (msg->cm_fields['R'] == NULL) {
 827                                                 free(msg->cm_fields['R']);
 828                                         }
 829                                         msg->cm_fields['R'] = strdup(nptr->name);
 830
 831                                         valid = validate_recipients(nptr->name, NULL, 0);
 832                                         CtdlSubmitMsg(msg, valid, "", 0);
 833                                         free_recipients(valid);
 834                                 }
 835
 836                         }
 837                         CtdlFreeMessage(msg);
 838                 }
 839         }
 840
 841         /*
 842          * Process IGnet push shares
 843          */
 844         msg = CtdlFetchMessage(msgnum, 1);
 845         if (msg != NULL) {
 846                 size_t newpath_len;
 847
 848                 /* Prepend our node name to the Path field whenever
 849                  * sending a message to another IGnet node
 850                  */
 851                 if (msg->cm_fields['P'] == NULL) {
 852                         msg->cm_fields['P'] = strdup("username");
 853                 }
 854                 newpath_len = strlen(msg->cm_fields['P']) +
 855                          strlen(config.c_nodename) + 2;
 856                 newpath = malloc(newpath_len);
 857                 snprintf(newpath, newpath_len, "%s!%s",
 858                          config.c_nodename, msg->cm_fields['P']);
 859                 free(msg->cm_fields['P']);
 860                 msg->cm_fields['P'] = newpath;
 861
 862                 /*
 863                  * Determine if this message is set to be deleted
 864                  * after sending out on the network
 865                  */
 866                 if (msg->cm_fields['S'] != NULL) {
 867                         if (!strcasecmp(msg->cm_fields['S'], "CANCEL")) {
 868                                 delete_after_send = 1;
 869                         }
 870                 }
 871
 872                 /* Now send it to every node */
 873                 if (sc->ignet_push_shares != NULL)
 874                   for (mptr = sc->ignet_push_shares; mptr != NULL;
 875                     mptr = mptr->next) {
 876
 877                         send = 1;
 878
 879                         /* Check for valid node name */
 880                         if (is_valid_node(NULL, NULL, mptr->remote_nodename) != 0) {
 881                                 CtdlLogPrintf(CTDL_ERR, "Invalid node <%s>\n", mptr->remote_nodename);
 882                                 send = 0;
 883                         }
 884
 885                         /* Check for split horizon */
 886                         CtdlLogPrintf(CTDL_DEBUG, "Path is %s\n", msg->cm_fields['P']);
 887                         bang = num_tokens(msg->cm_fields['P'], '!');
 888                         if (bang > 1) for (i=0; i<(bang-1); ++i) {
 889                                 extract_token(buf, msg->cm_fields['P'], i, '!', sizeof buf);
 890                                 CtdlLogPrintf(CTDL_DEBUG, "Compare <%s> to <%s>\n",
 891                                         buf, mptr->remote_nodename) ;
 892                                 if (!strcasecmp(buf, mptr->remote_nodename)) {
 893                                         send = 0;
 894                                         CtdlLogPrintf(CTDL_DEBUG, "Not sending to %s\n",
 895                                                 mptr->remote_nodename);
 896                                 }
 897                                 else {
 898                                         CtdlLogPrintf(CTDL_DEBUG, "Sending to %s\n", mptr->remote_nodename);
 899                                 }
 900                         }
 901
 902                         /* Send the message */
 903                         if (send == 1) {
 904
 905                                 /*
 906                                  * Force the message to appear in the correct room
 907                                  * on the far end by setting the C field correctly
 908                                  */
 909                                 if (msg->cm_fields['C'] != NULL) {
 910                                         free(msg->cm_fields['C']);
 911                                 }
 912                                 if (!IsEmptyStr(mptr->remote_roomname)) {
 913                                         msg->cm_fields['C'] = strdup(mptr->remote_roomname);
 914                                 }
 915                                 else {
 916                                         msg->cm_fields['C'] = strdup(CC->room.QRname);
 917                                 }
 918
 919                                 /* serialize it for transmission */
 920                                 serialize_message(&sermsg, msg);
 921                                 if (sermsg.len > 0) {
 922
 923                                         /* write it to a spool file */
 924                                         snprintf(filename, sizeof filename,"%s/%s@%lx%x",
 925                                                 ctdl_netout_dir,
 926                                                 mptr->remote_nodename,
 927                                                 time(NULL),
 928                                                 rand()
 929                                         );
 930                                         CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
 931                                         fp = fopen(filename, "ab");
 932                                         if (fp != NULL) {
 933                                                 fwrite(sermsg.ser,
 934                                                         sermsg.len, 1, fp);
 935                                                 fclose(fp);
 936                                         }
 937                                         else {
 938                                                 CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
 939                                         }
 940
 941                                         /* free the serialized version */
 942                                         free(sermsg.ser);
 943                                 }
 944
 945                         }
 946                 }
 947                 CtdlFreeMessage(msg);
 948         }
 949
 950         /* update lastsent */
 951         sc->lastsent = msgnum;
 952
 953         /* Delete this message if delete-after-send is set */
 954         if (delete_after_send) {
 955                 CtdlDeleteMessages(CC->room.QRname, &msgnum, 1, "");
 956         }
 957
 958 }
 959
 960
 961 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 962 {
 963         FILE *fp;
 964         char instr[SIZ];
 965         char buf[SIZ];
 966         char nodename[256];
 967         char roomname[ROOMNAMELEN];
 968         size_t miscsize = 0;
 969         size_t linesize = 0;
 970         int skipthisline = 0;
 971         namelist *nptr = NULL;
 972         maplist *mptr = NULL;
 973         SpoolControl *sc;
 974
 975         fp = fopen(filename, "r");
 976         if (fp == NULL) {
 977                 return 0;
 978         }
 979         sc = malloc(sizeof(SpoolControl));
 980         memset(sc, 0, sizeof(SpoolControl));
 981         *scc = sc;
 982
 983         while (fgets(buf, sizeof buf, fp) != NULL) {
 984                 buf[strlen(buf)-1] = 0;
 985
 986                 extract_token(instr, buf, 0, '|', sizeof instr);
 987                 if (!strcasecmp(instr, strof(lastsent))) {
 988                         sc->lastsent = extract_long(buf, 1);
 989                 }
 990                 else if (!strcasecmp(instr, strof(listrecp))) {
 991                         nptr = (namelist *)
 992                                 malloc(sizeof(namelist));
 993                         nptr->next = sc->listrecps;
 994                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 995                         sc->listrecps = nptr;
 996                 }
 997                 else if (!strcasecmp(instr, strof(participate))) {
 998                         nptr = (namelist *)
 999                                 malloc(sizeof(namelist));
1000                         nptr->next = sc->participates;
1001                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1002                         sc->participates = nptr;
1003                 }
1004                 else if (!strcasecmp(instr, strof(digestrecp))) {
1005                         nptr = (namelist *)
1006                                 malloc(sizeof(namelist));
1007                         nptr->next = sc->digestrecps;
1008                         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
1009                         sc->digestrecps = nptr;
1010                 }
1011                 else if (!strcasecmp(instr, strof(ignet_push_share))) {
1012                         extract_token(nodename, buf, 1, '|', sizeof nodename);
1013                         extract_token(roomname, buf, 2, '|', sizeof roomname);
1014                         mptr = (maplist *) malloc(sizeof(maplist));
1015                         mptr->next = sc->ignet_push_shares;
1016                         strcpy(mptr->remote_nodename, nodename);
1017                         strcpy(mptr->remote_roomname, roomname);
1018                         sc->ignet_push_shares = mptr;
1019                 }
1020                 else {
1021                         /* Preserve 'other' lines ... *unless* they happen to
1022                          * be subscribe/unsubscribe pendings with expired
1023                          * timestamps.
1024                          */
1025                         skipthisline = 0;
1026                         if (!strncasecmp(buf, strof(subpending)"|", 11)) {
1027                                 if (time(NULL) - extract_long(buf, 4) > EXP) {
1028                                         skipthisline = 1;
1029                                 }
1030                         }
1031                         if (!strncasecmp(buf, strof(unsubpending)"|", 13)) {
1032                                 if (time(NULL) - extract_long(buf, 3) > EXP) {
1033                                         skipthisline = 1;
1034                                 }
1035                         }
1036
1037                         if (skipthisline == 0) {
1038                                 linesize = strlen(buf);
1039                                 sc->misc = realloc(sc->misc,
1040                                         (miscsize + linesize + 2) );
1041                                 sprintf(&sc->misc[miscsize], "%s\n", buf);
1042                                 miscsize = miscsize + linesize + 1;
1043                         }
1044                 }
1045
1046
1047         }
1048         fclose(fp);
1049         return 1;
1050 }
1051
1052 void free_spoolcontrol_struct(SpoolControl **scc)
1053 {
1054         SpoolControl *sc;
1055         namelist *nptr = NULL;
1056         maplist *mptr = NULL;
1057
1058         sc = *scc;
1059         while (sc->listrecps != NULL) {
1060                 nptr = sc->listrecps->next;
1061                 free(sc->listrecps);
1062                 sc->listrecps = nptr;
1063         }
1064         /* Do the same for digestrecps */
1065         while (sc->digestrecps != NULL) {
1066                 nptr = sc->digestrecps->next;
1067                 free(sc->digestrecps);
1068                 sc->digestrecps = nptr;
1069         }
1070         /* Do the same for participates */
1071         while (sc->participates != NULL) {
1072                 nptr = sc->participates->next;
1073                 free(sc->participates);
1074                 sc->participates = nptr;
1075         }
1076         while (sc->ignet_push_shares != NULL) {
1077                 mptr = sc->ignet_push_shares->next;
1078                 free(sc->ignet_push_shares);
1079                 sc->ignet_push_shares = mptr;
1080         }
1081         free(sc->misc);
1082         free(sc);
1083         *scc=NULL;
1084 }
1085
1086 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
1087 {
1088         char tempfilename[PATH_MAX];
1089         int TmpFD;
1090         SpoolControl *sc;
1091         namelist *nptr = NULL;
1092         maplist *mptr = NULL;
1093         long len;
1094         time_t unixtime;
1095         struct timeval tv;
1096         long reltid; /* if we don't have SYS_gettid, use "random" value */
1097         StrBuf *Cfg;
1098         int rc;
1099
1100         len = strlen(filename);
1101         memcpy(tempfilename, filename, len + 1);
1102
1103
1104 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
1105         reltid = syscall(SYS_gettid);
1106 #endif
1107         gettimeofday(&tv, NULL);
1108         /* Promote to time_t; types differ on some OSes (like darwin) */
1109         unixtime = tv.tv_sec;
1110
1111         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
1112         sc = *scc;
1113         errno = 0;
1114         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
1115         Cfg = NewStrBuf();
1116         if ((TmpFD < 0) || (errno != 0)) {
1117                 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot open %s: %s\n",
1118                         filename, strerror(errno));
1119                 free_spoolcontrol_struct(scc);
1120                 unlink(tempfilename);
1121         }
1122         else {
1123                 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
1124
1125                 /* Write out the listrecps while freeing from memory at the
1126                  * same time.  Am I clever or what?  :)
1127                  */
1128                 while (sc->listrecps != NULL) {
1129                         StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
1130                         nptr = sc->listrecps->next;
1131                         free(sc->listrecps);
1132                         sc->listrecps = nptr;
1133                 }
1134                 /* Do the same for digestrecps */
1135                 while (sc->digestrecps != NULL) {
1136                         StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
1137                         nptr = sc->digestrecps->next;
1138                         free(sc->digestrecps);
1139                         sc->digestrecps = nptr;
1140                 }
1141                 /* Do the same for participates */
1142                 while (sc->participates != NULL) {
1143                         StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
1144                         nptr = sc->participates->next;
1145                         free(sc->participates);
1146                         sc->participates = nptr;
1147                 }
1148                 while (sc->ignet_push_shares != NULL) {
1149                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
1150                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
1151                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
1152                         }
1153                         StrBufAppendPrintf(Cfg, "\n");
1154                         mptr = sc->ignet_push_shares->next;
1155                         free(sc->ignet_push_shares);
1156                         sc->ignet_push_shares = mptr;
1157                 }
1158                 if (sc->misc != NULL) {
1159                         StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
1160                 }
1161                 free(sc->misc);
1162
1163                 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
1164                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
1165                 {
1166                         close(TmpFD);
1167                         rename(tempfilename, filename);
1168                 }
1169                 else {
1170                         CtdlLogPrintf(CTDL_EMERG,
1171                                       "unable to write %s; [%s]; not enough space on the disk?\n",
1172                                       tempfilename,
1173                                       strerror(errno));
1174                         close(TmpFD);
1175                         unlink(tempfilename);
1176                 }
1177                 FreeStrBuf(&Cfg);
1178                 free(sc);
1179                 *scc=NULL;
1180         }
1181         return 1;
1182 }
1183 int is_recipient(SpoolControl *sc, const char *Name)
1184 {
1185         namelist *nptr;
1186         size_t len;
1187
1188         len = strlen(Name);
1189         nptr = sc->listrecps;
1190         while (nptr != NULL) {
1191                 if (strncmp(Name, nptr->name, len)==0)
1192                         return 1;
1193                 nptr = nptr->next;
1194         }
1195         /* Do the same for digestrecps */
1196         nptr = sc->digestrecps;
1197         while (nptr != NULL) {
1198                 if (strncmp(Name, nptr->name, len)==0)
1199                         return 1;
1200                 nptr = nptr->next;
1201         }
1202         /* Do the same for participates */
1203         nptr = sc->participates;
1204         while (nptr != NULL) {
1205                 if (strncmp(Name, nptr->name, len)==0)
1206                         return 1;
1207                 nptr = nptr->next;
1208         }
1209         return 0;
1210 }
1211
1212
1213 /*
1214  * Batch up and send all outbound traffic from the current room
1215  */
1216 void network_spoolout_room(char *room_to_spool) {
1217         char buf[SIZ];
1218         char filename[PATH_MAX];
1219         SpoolControl *sc;
1220         int i;
1221
1222         /*
1223          * If the room doesn't exist, don't try to perform its networking tasks.
1224          * Normally this should never happen, but once in a while maybe a room gets
1225          * queued for networking and then deleted before it can happen.
1226          */
1227         if (CtdlGetRoom(&CC->room, room_to_spool) != 0) {
1228                 CtdlLogPrintf(CTDL_CRIT, "ERROR: cannot load <%s>\n", room_to_spool);
1229                 return;
1230         }
1231
1232         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1233         begin_critical_section(S_NETCONFIGS);
1234
1235         /* Only do net processing for rooms that have netconfigs */
1236         if (!read_spoolcontrol_file(&sc, filename))
1237         {
1238                 end_critical_section(S_NETCONFIGS);
1239                 return;
1240         }
1241         CtdlLogPrintf(CTDL_INFO, "Networking started for <%s>\n", CC->room.QRname);
1242
1243         /* If there are digest recipients, we have to build a digest */
1244         if (sc->digestrecps != NULL) {
1245                 sc->digestfp = tmpfile();
1246                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
1247         }
1248
1249         /* Do something useful */
1250         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
1251                 network_spool_msg, sc);
1252
1253         /* If we wrote a digest, deliver it and then close it */
1254         snprintf(buf, sizeof buf, "room_%s@%s",
1255                 CC->room.QRname, config.c_fqdn);
1256         for (i=0; buf[i]; ++i) {
1257                 buf[i] = tolower(buf[i]);
1258                 if (isspace(buf[i])) buf[i] = '_';
1259         }
1260         if (sc->digestfp != NULL) {
1261                 fprintf(sc->digestfp,   " -----------------------------------"
1262                                         "------------------------------------"
1263                                         "-------\n"
1264                                         "You are subscribed to the '%s' "
1265                                         "list.\n"
1266                                         "To post to the list: %s\n",
1267                                         CC->room.QRname, buf
1268                 );
1269                 network_deliver_digest(sc);     /* deliver and close */
1270         }
1271
1272         /* Now rewrite the config file */
1273         writenfree_spoolcontrol_file (&sc, filename);
1274         end_critical_section(S_NETCONFIGS);
1275 }
1276
1277
1278
1279 /*
1280  * Send the *entire* contents of the current room to one specific network node,
1281  * ignoring anything we know about which messages have already undergone
1282  * network processing.  This can be used to bring a new node into sync.
1283  */
1284 int network_sync_to(char *target_node) {
1285         SpoolControl sc;
1286         int num_spooled = 0;
1287         int found_node = 0;
1288         char buf[256];
1289         char sc_type[256];
1290         char sc_node[256];
1291         char sc_room[256];
1292         char filename[PATH_MAX];
1293         FILE *fp;
1294
1295         /* Grab the configuration line we're looking for */
1296         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
1297         begin_critical_section(S_NETCONFIGS);
1298         fp = fopen(filename, "r");
1299         if (fp == NULL) {
1300                 end_critical_section(S_NETCONFIGS);
1301                 return(-1);
1302         }
1303         while (fgets(buf, sizeof buf, fp) != NULL) {
1304                 buf[strlen(buf)-1] = 0;
1305                 extract_token(sc_type, buf, 0, '|', sizeof sc_type);
1306                 extract_token(sc_node, buf, 1, '|', sizeof sc_node);
1307                 extract_token(sc_room, buf, 2, '|', sizeof sc_room);
1308                 if ( (!strcasecmp(sc_type, "ignet_push_share"))
1309                    && (!strcasecmp(sc_node, target_node)) ) {
1310                         found_node = 1;
1311
1312                         /* Concise syntax because we don't need a full linked-list */
1313                         memset(&sc, 0, sizeof(SpoolControl));
1314                         sc.ignet_push_shares = (maplist *)
1315                                 malloc(sizeof(maplist));
1316                         sc.ignet_push_shares->next = NULL;
1317                         safestrncpy(sc.ignet_push_shares->remote_nodename,
1318                                 sc_node,
1319                                 sizeof sc.ignet_push_shares->remote_nodename);
1320                         safestrncpy(sc.ignet_push_shares->remote_roomname,
1321                                 sc_room,
1322                                 sizeof sc.ignet_push_shares->remote_roomname);
1323                 }
1324         }
1325         fclose(fp);
1326         end_critical_section(S_NETCONFIGS);
1327
1328         if (!found_node) return(-1);
1329
1330         /* Send ALL messages */
1331         num_spooled = CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
1332                 network_spool_msg, &sc);
1333
1334         /* Concise cleanup because we know there's only one node in the sc */
1335         free(sc.ignet_push_shares);
1336
1337         CtdlLogPrintf(CTDL_NOTICE, "Synchronized %d messages to <%s>\n",
1338                 num_spooled, target_node);
1339         return(num_spooled);
1340 }
1341
1342
1343 /*
1344  * Implements the NSYN command
1345  */
1346 void cmd_nsyn(char *argbuf) {
1347         int num_spooled;
1348         char target_node[256];
1349
1350         if (CtdlAccessCheck(ac_aide)) return;
1351
1352         extract_token(target_node, argbuf, 0, '|', sizeof target_node);
1353         num_spooled = network_sync_to(target_node);
1354         if (num_spooled >= 0) {
1355                 cprintf("%d Spooled %d messages.\n", CIT_OK, num_spooled);
1356         }
1357         else {
1358                 cprintf("%d No such room/node share exists.\n",
1359                         ERROR + ROOM_NOT_FOUND);
1360         }
1361 }
1362
1363
1364
1365 /*
1366  * Batch up and send all outbound traffic from the current room
1367  */
1368 void network_queue_room(struct ctdlroom *qrbuf, void *data) {
1369         struct RoomProcList *ptr;
1370
1371         ptr = (struct RoomProcList *) malloc(sizeof (struct RoomProcList));
1372         if (ptr == NULL) return;
1373
1374         safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
1375         begin_critical_section(S_RPLIST);
1376         ptr->next = rplist;
1377         rplist = ptr;
1378         end_critical_section(S_RPLIST);
1379 }
1380
1381 void destroy_network_queue_room(void)
1382 {
1383         struct RoomProcList *cur, *p;
1384         NetMap *nmcur, *nmp;
1385
1386         cur = rplist;
1387         begin_critical_section(S_RPLIST);
1388         while (cur != NULL)
1389         {
1390                 p = cur->next;
1391                 free (cur);
1392                 cur = p;
1393         }
1394         rplist = NULL;
1395         end_critical_section(S_RPLIST);
1396
1397         nmcur = the_netmap;
1398         while (nmcur != NULL)
1399         {
1400                 nmp = nmcur->next;
1401                 free (nmcur);
1402                 nmcur = nmp;
1403         }
1404         the_netmap = NULL;
1405         if (working_ignetcfg != NULL)
1406                 free (working_ignetcfg);
1407         working_ignetcfg = NULL;
1408 }
1409
1410
1411 /*
1412  * Learn topology from path fields
1413  */
1414 void network_learn_topology(char *node, char *path) {
1415         char nexthop[256];
1416         NetMap *nmptr;
1417
1418         strcpy(nexthop, "");
1419
1420         if (num_tokens(path, '!') < 3) return;
1421         for (nmptr = the_netmap; nmptr != NULL; nmptr = nmptr->next) {
1422                 if (!strcasecmp(nmptr->nodename, node)) {
1423                         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1424                         nmptr->lastcontact = time(NULL);
1425                         ++netmap_changed;
1426                         return;
1427                 }
1428         }
1429
1430         /* If we got here then it's not in the map, so add it. */
1431         nmptr = (NetMap *) malloc(sizeof (NetMap));
1432         strcpy(nmptr->nodename, node);
1433         nmptr->lastcontact = time(NULL);
1434         extract_token(nmptr->nexthop, path, 0, '!', sizeof nmptr->nexthop);
1435         nmptr->next = the_netmap;
1436         the_netmap = nmptr;
1437         ++netmap_changed;
1438 }
1439
1440
1441
1442
1443 /*
1444  * Bounce a message back to the sender
1445  */
1446 void network_bounce(struct CtdlMessage *msg, char *reason) {
1447         char *oldpath = NULL;
1448         char buf[SIZ];
1449         char bouncesource[SIZ];
1450         char recipient[SIZ];
1451         struct recptypes *valid = NULL;
1452         char force_room[ROOMNAMELEN];
1453         static int serialnum = 0;
1454         size_t size;
1455
1456         CtdlLogPrintf(CTDL_DEBUG, "entering network_bounce()\n");
1457
1458         if (msg == NULL) return;
1459
1460         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
1461
1462         /*
1463          * Give it a fresh message ID
1464          */
1465         if (msg->cm_fields['I'] != NULL) {
1466                 free(msg->cm_fields['I']);
1467         }
1468         snprintf(buf, sizeof buf, "%ld.%04lx.%04x@%s",
1469                 (long)time(NULL), (long)getpid(), ++serialnum, config.c_fqdn);
1470         msg->cm_fields['I'] = strdup(buf);
1471
1472         /*
1473          * FIXME ... right now we're just sending a bounce; we really want to
1474          * include the text of the bounced message.
1475          */
1476         if (msg->cm_fields['M'] != NULL) {
1477                 free(msg->cm_fields['M']);
1478         }
1479         msg->cm_fields['M'] = strdup(reason);
1480         msg->cm_format_type = 0;
1481
1482         /*
1483          * Turn the message around
1484          */
1485         if (msg->cm_fields['R'] == NULL) {
1486                 free(msg->cm_fields['R']);
1487         }
1488
1489         if (msg->cm_fields['D'] == NULL) {
1490                 free(msg->cm_fields['D']);
1491         }
1492
1493         snprintf(recipient, sizeof recipient, "%s@%s",
1494                 msg->cm_fields['A'], msg->cm_fields['N']);
1495
1496         if (msg->cm_fields['A'] == NULL) {
1497                 free(msg->cm_fields['A']);
1498         }
1499
1500         if (msg->cm_fields['N'] == NULL) {
1501                 free(msg->cm_fields['N']);
1502         }
1503
1504         if (msg->cm_fields['U'] == NULL) {
1505                 free(msg->cm_fields['U']);
1506         }
1507
1508         msg->cm_fields['A'] = strdup(BOUNCESOURCE);
1509         msg->cm_fields['N'] = strdup(config.c_nodename);
1510         msg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1511
1512         /* prepend our node to the path */
1513         if (msg->cm_fields['P'] != NULL) {
1514                 oldpath = msg->cm_fields['P'];
1515                 msg->cm_fields['P'] = NULL;
1516         }
1517         else {
1518                 oldpath = strdup("unknown_user");
1519         }
1520         size = strlen(oldpath) + SIZ;
1521         msg->cm_fields['P'] = malloc(size);
1522         snprintf(msg->cm_fields['P'], size, "%s!%s", config.c_nodename, oldpath);
1523         free(oldpath);
1524
1525         /* Now submit the message */
1526         valid = validate_recipients(recipient, NULL, 0);
1527         if (valid != NULL) if (valid->num_error != 0) {
1528                 free_recipients(valid);
1529                 valid = NULL;
1530         }
1531         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
1532                 strcpy(force_room, config.c_aideroom);
1533         }
1534         else {
1535                 strcpy(force_room, "");
1536         }
1537         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
1538                 strcpy(force_room, config.c_aideroom);
1539         }
1540         CtdlSubmitMsg(msg, valid, force_room, 0);
1541
1542         /* Clean up */
1543         if (valid != NULL) free_recipients(valid);
1544         CtdlFreeMessage(msg);
1545         CtdlLogPrintf(CTDL_DEBUG, "leaving network_bounce()\n");
1546 }
1547
1548
1549
1550
1551 /*
1552  * Process a buffer containing a single message from a single file
1553  * from the inbound queue
1554  */
1555 void network_process_buffer(char *buffer, long size) {
1556         struct CtdlMessage *msg = NULL;
1557         long pos;
1558         int field;
1559         struct recptypes *recp = NULL;
1560         char target_room[ROOMNAMELEN];
1561         struct ser_ret sermsg;
1562         char *oldpath = NULL;
1563         char filename[PATH_MAX];
1564         FILE *fp;
1565         char nexthop[SIZ];
1566         unsigned char firstbyte;
1567         unsigned char lastbyte;
1568
1569         CtdlLogPrintf(CTDL_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
1570
1571         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
1572         firstbyte = buffer[0];
1573         lastbyte = buffer[size-1];
1574         if ( (firstbyte != 255) || (lastbyte != 0) ) {
1575                 CtdlLogPrintf(CTDL_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
1576                         size, firstbyte, lastbyte);
1577                 return;
1578         }
1579
1580         /* Set default target room to trash */
1581         strcpy(target_room, TWITROOM);
1582
1583         /* Load the message into memory */
1584         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1585         memset(msg, 0, sizeof(struct CtdlMessage));
1586         msg->cm_magic = CTDLMESSAGE_MAGIC;
1587         msg->cm_anon_type = buffer[1];
1588         msg->cm_format_type = buffer[2];
1589
1590         for (pos = 3; pos < size; ++pos) {
1591                 field = buffer[pos];
1592                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
1593                 pos = pos + strlen(&buffer[(int)pos]);
1594         }
1595
1596         /* Check for message routing */
1597         if (msg->cm_fields['D'] != NULL) {
1598                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
1599
1600                         /* route the message */
1601                         strcpy(nexthop, "");
1602                         if (is_valid_node(nexthop, NULL, msg->cm_fields['D']) == 0) {
1603                                 /* prepend our node to the path */
1604                                 if (msg->cm_fields['P'] != NULL) {
1605                                         oldpath = msg->cm_fields['P'];
1606                                         msg->cm_fields['P'] = NULL;
1607                                 }
1608                                 else {
1609                                         oldpath = strdup("unknown_user");
1610                                 }
1611                                 size = strlen(oldpath) + SIZ;
1612                                 msg->cm_fields['P'] = malloc(size);
1613                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
1614                                         config.c_nodename, oldpath);
1615                                 free(oldpath);
1616
1617                                 /* serialize the message */
1618                                 serialize_message(&sermsg, msg);
1619
1620                                 /* now send it */
1621                                 if (IsEmptyStr(nexthop)) {
1622                                         strcpy(nexthop, msg->cm_fields['D']);
1623                                 }
1624                                 snprintf(filename,
1625                                         sizeof filename,
1626                                         "%s/%s@%lx%x",
1627                                         ctdl_netout_dir,
1628                                         nexthop,
1629                                         time(NULL),
1630                                         rand()
1631                                 );
1632                                 CtdlLogPrintf(CTDL_DEBUG, "Appending to %s\n", filename);
1633                                 fp = fopen(filename, "ab");
1634                                 if (fp != NULL) {
1635                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
1636                                         fclose(fp);
1637                                 }
1638                                 else {
1639                                         CtdlLogPrintf(CTDL_ERR, "%s: %s\n", filename, strerror(errno));
1640                                 }
1641                                 free(sermsg.ser);
1642                                 CtdlFreeMessage(msg);
1643                                 return;
1644                         }
1645
1646                         else {  /* invalid destination node name */
1647
1648                                 network_bounce(msg,
1649 "A message you sent could not be delivered due to an invalid destination node"
1650 " name.  Please check the address and try sending the message again.\n");
1651                                 msg = NULL;
1652                                 return;
1653
1654                         }
1655                 }
1656         }
1657
1658         /*
1659          * Check to see if we already have a copy of this message, and
1660          * abort its processing if so.  (We used to post a warning to Aide>
1661          * every time this happened, but the network is now so densely
1662          * connected that it's inevitable.)
1663          */
1664         if (network_usetable(msg) != 0) {
1665                 CtdlFreeMessage(msg);
1666                 return;
1667         }
1668
1669         /* Learn network topology from the path */
1670         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
1671                 network_learn_topology(msg->cm_fields['N'], msg->cm_fields['P']);
1672         }
1673
1674         /* Is the sending node giving us a very persuasive suggestion about
1675          * which room this message should be saved in?  If so, go with that.
1676          */
1677         if (msg->cm_fields['C'] != NULL) {
1678                 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
1679         }
1680
1681         /* Otherwise, does it have a recipient?  If so, validate it... */
1682         else if (msg->cm_fields['R'] != NULL) {
1683                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
1684                 if (recp != NULL) if (recp->num_error != 0) {
1685                         network_bounce(msg,
1686                                 "A message you sent could not be delivered due to an invalid address.\n"
1687                                 "Please check the address and try sending the message again.\n");
1688                         msg = NULL;
1689                         free_recipients(recp);
1690                         CtdlLogPrintf(CTDL_DEBUG, "Bouncing message due to invalid recipient address.\n");
1691                         return;
1692                 }
1693                 strcpy(target_room, "");        /* no target room if mail */
1694         }
1695
1696         /* Our last shot at finding a home for this message is to see if
1697          * it has the O field (Originating room) set.
1698          */
1699         else if (msg->cm_fields['O'] != NULL) {
1700                 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
1701         }
1702
1703         /* Strip out fields that are only relevant during transit */
1704         if (msg->cm_fields['D'] != NULL) {
1705                 free(msg->cm_fields['D']);
1706                 msg->cm_fields['D'] = NULL;
1707         }
1708         if (msg->cm_fields['C'] != NULL) {
1709                 free(msg->cm_fields['C']);
1710                 msg->cm_fields['C'] = NULL;
1711         }
1712
1713         /* save the message into a room */
1714         if (PerformNetprocHooks(msg, target_room) == 0) {
1715                 msg->cm_flags = CM_SKIP_HOOKS;
1716                 CtdlSubmitMsg(msg, recp, target_room, 0);
1717         }
1718         CtdlFreeMessage(msg);
1719         free_recipients(recp);
1720 }
1721
1722
1723 /*
1724  * Process a single message from a single file from the inbound queue
1725  */
1726 void network_process_message(FILE *fp, long msgstart, long msgend) {
1727         long hold_pos;
1728         long size;
1729         char *buffer;
1730
1731         hold_pos = ftell(fp);
1732         size = msgend - msgstart + 1;
1733         buffer = malloc(size);
1734         if (buffer != NULL) {
1735                 fseek(fp, msgstart, SEEK_SET);
1736                 if (fread(buffer, size, 1, fp) > 0) {
1737                         network_process_buffer(buffer, size);
1738                 }
1739                 free(buffer);
1740         }
1741
1742         fseek(fp, hold_pos, SEEK_SET);
1743 }
1744
1745
1746 /*
1747  * Process a single file from the inbound queue
1748  */
1749 void network_process_file(char *filename) {
1750         FILE *fp;
1751         long msgstart = (-1L);
1752         long msgend = (-1L);
1753         long msgcur = 0L;
1754         int ch;
1755
1756
1757         fp = fopen(filename, "rb");
1758         if (fp == NULL) {
1759                 CtdlLogPrintf(CTDL_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
1760                 return;
1761         }
1762
1763         fseek(fp, 0L, SEEK_END);
1764         CtdlLogPrintf(CTDL_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
1765         rewind(fp);
1766
1767         /* Look for messages in the data stream and break them out */
1768         while (ch = getc(fp), ch >= 0) {
1769
1770                 if (ch == 255) {
1771                         if (msgstart >= 0L) {
1772                                 msgend = msgcur - 1;
1773                                 network_process_message(fp, msgstart, msgend);
1774                         }
1775                         msgstart = msgcur;
1776                 }
1777
1778                 ++msgcur;
1779         }
1780
1781         msgend = msgcur - 1;
1782         if (msgstart >= 0L) {
1783                 network_process_message(fp, msgstart, msgend);
1784         }
1785
1786         fclose(fp);
1787         unlink(filename);
1788 }
1789
1790
1791 /*
1792  * Process anything in the inbound queue
1793  */
1794 void network_do_spoolin(void) {
1795         DIR *dp;
1796         struct dirent *d;
1797         struct stat statbuf;
1798         char filename[PATH_MAX];
1799         static time_t last_spoolin_mtime = 0L;
1800
1801         /*
1802          * Check the spoolin directory's modification time.  If it hasn't
1803          * been touched, we don't need to scan it.
1804          */
1805         if (stat(ctdl_netin_dir, &statbuf)) return;
1806         if (statbuf.st_mtime == last_spoolin_mtime) {
1807                 CtdlLogPrintf(CTDL_DEBUG, "network: nothing in inbound queue\n");
1808                 return;
1809         }
1810         last_spoolin_mtime = statbuf.st_mtime;
1811         CtdlLogPrintf(CTDL_DEBUG, "network: processing inbound queue\n");
1812
1813         /*
1814          * Ok, there's something interesting in there, so scan it.
1815          */
1816         dp = opendir(ctdl_netin_dir);
1817         if (dp == NULL) return;
1818
1819         while (d = readdir(dp), d != NULL) {
1820                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
1821                         snprintf(filename,
1822                                 sizeof filename,
1823                                 "%s/%s",
1824                                 ctdl_netin_dir,
1825                                 d->d_name
1826                         );
1827                         network_process_file(filename);
1828                 }
1829         }
1830
1831         closedir(dp);
1832 }
1833
1834 /*
1835  * Step 1: consolidate files in the outbound queue into one file per neighbor node
1836  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
1837  */
1838 void network_consolidate_spoolout(void) {
1839         DIR *dp;
1840         struct dirent *d;
1841         char filename[PATH_MAX];
1842         char cmd[PATH_MAX];
1843         char nexthop[256];
1844         int i;
1845         char *ptr;
1846
1847         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
1848         dp = opendir(ctdl_netout_dir);
1849         if (dp == NULL) return;
1850         while (d = readdir(dp), d != NULL) {
1851                 if (
1852                         (strcmp(d->d_name, "."))
1853                         && (strcmp(d->d_name, ".."))
1854                         && (strchr(d->d_name, '@') != NULL)
1855                 ) {
1856                         safestrncpy(nexthop, d->d_name, sizeof nexthop);
1857                         ptr = strchr(nexthop, '@');
1858                         if (ptr) *ptr = 0;
1859
1860                         snprintf(filename,
1861                                 sizeof filename,
1862                                 "%s/%s",
1863                                 ctdl_netout_dir,
1864                                 d->d_name
1865                         );
1866
1867                         CtdlLogPrintf(CTDL_DEBUG, "Consolidate %s to %s\n", filename, nexthop);
1868                         if (network_talking_to(nexthop, NTT_CHECK)) {
1869                                 CtdlLogPrintf(CTDL_DEBUG,
1870                                         "Currently online with %s - skipping for now\n",
1871                                         nexthop
1872                                 );
1873                         }
1874                         else {
1875                                 network_talking_to(nexthop, NTT_ADD);
1876                                 snprintf(cmd, sizeof cmd, "/bin/cat %s >>%s/%s && /bin/rm -f %s",
1877                                         filename,
1878                                         ctdl_netout_dir, nexthop,
1879                                         filename
1880                                 );
1881                                 system(cmd);
1882                                 network_talking_to(nexthop, NTT_REMOVE);
1883                         }
1884                 }
1885         }
1886         closedir(dp);
1887
1888         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1889
1890         dp = opendir(ctdl_netout_dir);
1891         if (dp == NULL) return;
1892
1893         while (d = readdir(dp), d != NULL) {
1894                 if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
1895                         continue;
1896                 ptr = strchr(d->d_name, '@');
1897                 if (d != NULL)
1898                         continue;
1899                 snprintf(filename,
1900                         sizeof filename,
1901                         "%s/%s",
1902                         ctdl_netout_dir,
1903                         d->d_name
1904                 );
1905
1906                 strcpy(nexthop, "");
1907                 i = is_valid_node(nexthop, NULL, d->d_name);
1908
1909                 if ( (i != 0) || !IsEmptyStr(nexthop) ) {
1910                         unlink(filename);
1911                 }
1912         }
1913
1914
1915         closedir(dp);
1916 }
1917
1918
1919 /*
1920  * receive network spool from the remote system
1921  */
1922 void receive_spool(int *sock, char *remote_nodename) {
1923         long download_len = 0L;
1924         long bytes_received = 0L;
1925         char buf[SIZ];
1926         static char pbuf[IGNET_PACKET_SIZE];
1927         char tempfilename[PATH_MAX];
1928         char permfilename[PATH_MAX];
1929         long plen;
1930         FILE *fp;
1931
1932         snprintf(tempfilename,
1933                 sizeof tempfilename,
1934                 "%s/%s.%lx%x",
1935                 ctdl_nettmp_dir,
1936                 remote_nodename,
1937                 time(NULL),
1938                 rand()
1939         );
1940
1941         snprintf(permfilename,
1942                 sizeof permfilename,
1943                 "%s/%s.%lx%x",
1944                 ctdl_netin_dir,
1945                 remote_nodename,
1946                 time(NULL),
1947                 rand()
1948         );
1949
1950         if (sock_puts(sock, "NDOP") < 0) return;
1951         if (sock_getln(sock, buf, sizeof buf) < 0) return;
1952         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1953         if (buf[0] != '2') {
1954                 return;
1955         }
1956         download_len = extract_long(&buf[4], 0);
1957
1958         if (download_len>0) {
1959                 bytes_received = 0L;
1960                 fp = fopen(tempfilename, "w");
1961                 if (fp == NULL) {
1962                         CtdlLogPrintf(CTDL_CRIT, "cannot open download file locally: %s\n",
1963                                       strerror(errno));
1964                         return;
1965                 }
1966
1967                 CtdlLogPrintf(CTDL_DEBUG, "For this download we are expecting %d bytes\n", download_len);
1968                 while (bytes_received < download_len) {
1969                         /*
1970                          * If shutting down we can exit here and unlink the temp file.
1971                          * this shouldn't loose us any messages.
1972                          */
1973                         if (CtdlThreadCheckStop())
1974                         {
1975                                 fclose(fp);
1976                                 unlink(tempfilename);
1977                                 return;
1978                         }
1979                         snprintf(buf, sizeof buf, "READ %ld|%ld",
1980                                  bytes_received,
1981                                  ((download_len - bytes_received > IGNET_PACKET_SIZE)
1982                                   ? IGNET_PACKET_SIZE : (download_len - bytes_received)));
1983
1984                         if (sock_puts(sock, buf) < 0) {
1985                                 fclose(fp);
1986                                 unlink(tempfilename);
1987                                 return;
1988                         }
1989                         if (sock_getln(sock, buf, sizeof buf) < 0) {
1990                                 fclose(fp);
1991                                 unlink(tempfilename);
1992                                 return;
1993                         }
1994
1995                         if (buf[0] == '6') {
1996                                 plen = extract_long(&buf[4], 0);
1997                                 if (sock_read(sock, pbuf, plen, 1) < 0) {
1998                                         fclose(fp);
1999                                         unlink(tempfilename);
2000                                         return;
2001                                 }
2002                                 fwrite((char *) pbuf, plen, 1, fp);
2003                                 bytes_received = bytes_received + plen;
2004                         }
2005                 }
2006
2007                 fclose(fp);
2008         }
2009         /* Last chance for shutdown exit */
2010         if (CtdlThreadCheckStop())
2011         {
2012                 unlink(tempfilename);
2013                 return;
2014         }
2015
2016         if (sock_puts(sock, "CLOS") < 0) {
2017                 unlink(tempfilename);
2018                 return;
2019         }
2020
2021         /*
2022          * From here on we must complete or messages will get lost
2023          */
2024         if (sock_getln(sock, buf, sizeof buf) < 0) {
2025                 unlink(tempfilename);
2026                 return;
2027         }
2028         if (download_len > 0) {
2029                 CtdlLogPrintf(CTDL_NOTICE, "Received %ld octets from <%s>\n", download_len, remote_nodename);
2030         }
2031         CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
2032
2033         /* Now move the temp file to its permanent location.
2034          */
2035         if (link(tempfilename, permfilename) != 0) {
2036                 CtdlLogPrintf(CTDL_ALERT, "Could not link %s to %s: %s\n",
2037                         tempfilename, permfilename, strerror(errno)
2038                 );
2039         }
2040         unlink(tempfilename);
2041 }
2042
2043
2044
2045 /*
2046  * transmit network spool to the remote system
2047  */
2048 void transmit_spool(int *sock, char *remote_nodename)
2049 {
2050         char buf[SIZ];
2051         char pbuf[4096];
2052         long plen;
2053         long bytes_to_write, thisblock, bytes_written;
2054         int fd;
2055         char sfname[128];
2056
2057         if (sock_puts(sock, "NUOP") < 0) return;
2058         if (sock_getln(sock, buf, sizeof buf) < 0) return;
2059         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2060         if (buf[0] != '2') {
2061                 return;
2062         }
2063
2064         snprintf(sfname, sizeof sfname,
2065                 "%s/%s",
2066                 ctdl_netout_dir,
2067                 remote_nodename
2068         );
2069         fd = open(sfname, O_RDONLY);
2070         if (fd < 0) {
2071                 if (errno != ENOENT) {
2072                         CtdlLogPrintf(CTDL_CRIT, "cannot open %s: %s\n", sfname, strerror(errno));
2073                 }
2074                 return;
2075         }
2076         bytes_written = 0;
2077         while (plen = (long) read(fd, pbuf, IGNET_PACKET_SIZE), plen > 0L) {
2078                 bytes_to_write = plen;
2079                 while (bytes_to_write > 0L) {
2080                         /* Exit if shutting down */
2081                         if (CtdlThreadCheckStop())
2082                         {
2083                                 close(fd);
2084                                 return;
2085                         }
2086
2087                         snprintf(buf, sizeof buf, "WRIT %ld", bytes_to_write);
2088                         if (sock_puts(sock, buf) < 0) {
2089                                 close(fd);
2090                                 return;
2091                         }
2092                         if (sock_getln(sock, buf, sizeof buf) < 0) {
2093                                 close(fd);
2094                                 return;
2095                         }
2096                         thisblock = atol(&buf[4]);
2097                         if (buf[0] == '7') {
2098                                 if (sock_write(sock, pbuf, (int) thisblock) < 0) {
2099                                         close(fd);
2100                                         return;
2101                                 }
2102                                 bytes_to_write -= thisblock;
2103                                 bytes_written += thisblock;
2104                         } else {
2105                                 goto ABORTUPL;
2106                         }
2107                 }
2108         }
2109
2110 ABORTUPL:
2111         close(fd);
2112
2113         /* Last chance for shutdown exit */
2114         if(CtdlThreadCheckStop())
2115                 return;
2116
2117         if (sock_puts(sock, "UCLS 1") < 0) return;
2118
2119         /*
2120          * From here on we must complete or messages will get lost
2121          */
2122         if (sock_getln(sock, buf, sizeof buf) < 0) return;
2123         CtdlLogPrintf(CTDL_NOTICE, "Sent %ld octets to <%s>\n", bytes_written, remote_nodename);
2124         CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2125         if (buf[0] == '2') {
2126                 CtdlLogPrintf(CTDL_DEBUG, "Removing <%s>\n", sfname);
2127                 unlink(sfname);
2128         }
2129 }
2130
2131
2132
2133 /*
2134  * Poll one Citadel node (called by network_poll_other_citadel_nodes() below)
2135  */
2136 void network_poll_node(char *node, char *secret, char *host, char *port) {
2137         int sock;
2138         char buf[SIZ];
2139         char err_buf[SIZ];
2140         char connected_to[SIZ];
2141         CitContext *CCC=CC;
2142
2143         if (network_talking_to(node, NTT_CHECK)) return;
2144         network_talking_to(node, NTT_ADD);
2145         CtdlLogPrintf(CTDL_DEBUG, "network: polling <%s>\n", node);
2146         CtdlLogPrintf(CTDL_NOTICE, "Connecting to <%s> at %s:%s\n", node, host, port);
2147
2148         sock = sock_connect(host, port);
2149         if (sock < 0) {
2150                 CtdlLogPrintf(CTDL_ERR, "Could not connect: %s\n", strerror(errno));
2151                 network_talking_to(node, NTT_REMOVE);
2152                 return;
2153         }
2154
2155         CtdlLogPrintf(CTDL_DEBUG, "Connected!\n");
2156         CCC->sReadBuf = NewStrBuf();
2157         CCC->sMigrateBuf = NewStrBuf();
2158         CCC->sPos = NULL;
2159
2160         /* Read the server greeting */
2161         if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2162         CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
2163
2164         /* Check that the remote is who we think it is and warn the Aide if not */
2165         extract_token (connected_to, buf, 1, ' ', sizeof connected_to);
2166         if (strcmp(connected_to, node))
2167         {
2168                 snprintf(err_buf, sizeof(err_buf),
2169                         "Connected to node \"%s\" but I was expecting to connect to node \"%s\".",
2170                         connected_to, node
2171                 );
2172                 CtdlLogPrintf(CTDL_ERR, "%s\n", err_buf);
2173                 CtdlAideMessage(err_buf, "Network error");
2174         }
2175         else {
2176                 /* We're talking to the correct node.  Now identify ourselves. */
2177                 snprintf(buf, sizeof buf, "NETP %s|%s", config.c_nodename, secret);
2178                 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
2179                 if (sock_puts(&sock, buf) <0) goto bail;
2180                 if (sock_getln(&sock, buf, sizeof buf) < 0) goto bail;
2181                 CtdlLogPrintf(CTDL_DEBUG, ">%s\n", buf);
2182                 if (buf[0] != '2') {
2183                         goto bail;
2184                 }
2185
2186                 /* At this point we are authenticated. */
2187                 if (!CtdlThreadCheckStop())
2188                         receive_spool(&sock, node);
2189                 if (!CtdlThreadCheckStop())
2190                         transmit_spool(&sock, node);
2191         }
2192
2193         sock_puts(&sock, "QUIT");
2194 bail:
2195         FreeStrBuf(&CCC->sReadBuf);
2196         FreeStrBuf(&CCC->sMigrateBuf);
2197         if (sock != -1)
2198                 sock_close(sock);
2199         network_talking_to(node, NTT_REMOVE);
2200 }
2201
2202
2203
2204 /*
2205  * Poll other Citadel nodes and transfer inbound/outbound network data.
2206  * Set "full" to nonzero to force a poll of every node, or to zero to poll
2207  * only nodes to which we have data to send.
2208  */
2209 void network_poll_other_citadel_nodes(int full_poll) {
2210         int i;
2211         char linebuf[256];
2212         char node[SIZ];
2213         char host[256];
2214         char port[256];
2215         char secret[256];
2216         int poll = 0;
2217         char spoolfile[256];
2218
2219         if (working_ignetcfg == NULL) {
2220                 CtdlLogPrintf(CTDL_DEBUG, "network: no neighbor nodes are configured - not polling.\n");
2221                 return;
2222         }
2223
2224         /* Use the string tokenizer to grab one line at a time */
2225         for (i=0; i<num_tokens(working_ignetcfg, '\n'); ++i) {
2226                 if(CtdlThreadCheckStop())
2227                         return;
2228                 extract_token(linebuf, working_ignetcfg, i, '\n', sizeof linebuf);
2229                 extract_token(node, linebuf, 0, '|', sizeof node);
2230                 extract_token(secret, linebuf, 1, '|', sizeof secret);
2231                 extract_token(host, linebuf, 2, '|', sizeof host);
2232                 extract_token(port, linebuf, 3, '|', sizeof port);
2233                 if ( !IsEmptyStr(node) && !IsEmptyStr(secret)
2234                    && !IsEmptyStr(host) && !IsEmptyStr(port)) {
2235                         poll = full_poll;
2236                         if (poll == 0) {
2237                                 snprintf(spoolfile,
2238                                          sizeof spoolfile,
2239                                          "%s/%s",
2240                                          ctdl_netout_dir,
2241                                          node
2242                                 );
2243                                 if (access(spoolfile, R_OK) == 0) {
2244                                         poll = 1;
2245                                 }
2246                         }
2247                         if (poll) {
2248                                 network_poll_node(node, secret, host, port);
2249                         }
2250                 }
2251         }
2252
2253 }
2254
2255
2256
2257
2258 /*
2259  * It's ok if these directories already exist.  Just fail silently.
2260  */
2261 void create_spool_dirs(void) {
2262         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
2263                 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
2264         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
2265                 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
2266         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
2267                 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
2268         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
2269                 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
2270         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
2271                 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2272         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
2273                 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
2274         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
2275                 CtdlLogPrintf(CTDL_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
2276         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
2277                 CtdlLogPrintf(CTDL_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
2278 }
2279
2280
2281
2282
2283
2284 /*
2285  * network_do_queue()
2286  *
2287  * Run through the rooms doing various types of network stuff.
2288  */
2289 void network_do_queue(void) {
2290         static time_t last_run = 0L;
2291         struct RoomProcList *ptr;
2292         int full_processing = 1;
2293
2294         /*
2295          * Run the full set of processing tasks no more frequently
2296          * than once every n seconds
2297          */
2298         if ( (time(NULL) - last_run) < config.c_net_freq ) {
2299                 full_processing = 0;
2300                 CtdlLogPrintf(CTDL_DEBUG, "Network full processing in %ld seconds.\n",
2301                         config.c_net_freq - (time(NULL)- last_run)
2302                 );
2303         }
2304
2305         /*
2306          * This is a simple concurrency check to make sure only one queue run
2307          * is done at a time.  We could do this with a mutex, but since we
2308          * don't really require extremely fine granularity here, we'll do it
2309          * with a static variable instead.
2310          */
2311         if (doing_queue) {
2312                 return;
2313         }
2314         doing_queue = 1;
2315
2316         /* Load the IGnet Configuration into memory */
2317         load_working_ignetcfg();
2318
2319         /*
2320          * Poll other Citadel nodes.  Maybe.  If "full_processing" is set
2321          * then we poll everyone.  Otherwise we only poll nodes we have stuff
2322          * to send to.
2323          */
2324         network_poll_other_citadel_nodes(full_processing);
2325
2326         /*
2327          * Load the network map and filter list into memory.
2328          */
2329         read_network_map();
2330         filterlist = load_filter_list();
2331
2332         /*
2333          * Go ahead and run the queue
2334          */
2335         if (full_processing && !CtdlThreadCheckStop()) {
2336                 CtdlLogPrintf(CTDL_DEBUG, "network: loading outbound queue\n");
2337                 CtdlForEachRoom(network_queue_room, NULL);
2338         }
2339
2340         if (rplist != NULL) {
2341                 CtdlLogPrintf(CTDL_DEBUG, "network: running outbound queue\n");
2342                 while (rplist != NULL && !CtdlThreadCheckStop()) {
2343                         char spoolroomname[ROOMNAMELEN];
2344                         safestrncpy(spoolroomname, rplist->name, sizeof spoolroomname);
2345                         begin_critical_section(S_RPLIST);
2346
2347                         /* pop this record off the list */
2348                         ptr = rplist;
2349                         rplist = rplist->next;
2350                         free(ptr);
2351
2352                         /* invalidate any duplicate entries to prevent double processing */
2353                         for (ptr=rplist; ptr!=NULL; ptr=ptr->next) {
2354                                 if (!strcasecmp(ptr->name, spoolroomname)) {
2355                                         ptr->name[0] = 0;
2356                                 }
2357                         }
2358
2359                         end_critical_section(S_RPLIST);
2360                         if (spoolroomname[0] != 0) {
2361                                 network_spoolout_room(spoolroomname);
2362                         }
2363                 }
2364         }
2365
2366         /* If there is anything in the inbound queue, process it */
2367         if (!CtdlThreadCheckStop()) {
2368                 network_do_spoolin();
2369         }
2370
2371         /* Save the network map back to disk */
2372         write_network_map();
2373
2374         /* Free the filter list in memory */
2375         free_filter_list(filterlist);
2376         filterlist = NULL;
2377
2378         network_consolidate_spoolout();
2379
2380         CtdlLogPrintf(CTDL_DEBUG, "network: queue run completed\n");
2381
2382         if (full_processing) {
2383                 last_run = time(NULL);
2384         }
2385
2386         doing_queue = 0;
2387 }
2388
2389
2390 /*
2391  * cmd_netp() - authenticate to the server as another Citadel node polling
2392  *            for network traffic
2393  */
2394 void cmd_netp(char *cmdbuf)
2395 {
2396         char node[256];
2397         char pass[256];
2398         int v;
2399
2400         char secret[256];
2401         char nexthop[256];
2402         char err_buf[SIZ];
2403
2404         /* Authenticate */
2405         extract_token(node, cmdbuf, 0, '|', sizeof node);
2406         extract_token(pass, cmdbuf, 1, '|', sizeof pass);
2407
2408         /* load the IGnet Configuration to check node validity */
2409         load_working_ignetcfg();
2410         v = is_valid_node(nexthop, secret, node);
2411
2412         if (v != 0) {
2413                 snprintf(err_buf, sizeof err_buf,
2414                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
2415                         node, CC->cs_host, CC->cs_addr
2416                 );
2417                 CtdlLogPrintf(CTDL_WARNING, err_buf);
2418                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2419                 CtdlAideMessage(err_buf, "IGNet Networking.");
2420                 return;
2421         }
2422
2423         if (strcasecmp(pass, secret)) {
2424                 snprintf(err_buf, sizeof err_buf,
2425                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
2426                         CC->cs_host, CC->cs_addr, node
2427                 );
2428                 CtdlLogPrintf(CTDL_WARNING, err_buf);
2429                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
2430                 CtdlAideMessage(err_buf, "IGNet Networking.");
2431                 return;
2432         }
2433
2434         if (network_talking_to(node, NTT_CHECK)) {
2435                 CtdlLogPrintf(CTDL_WARNING, "Duplicate session for network node <%s>", node);
2436                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
2437                 return;
2438         }
2439
2440         safestrncpy(CC->net_node, node, sizeof CC->net_node);
2441         network_talking_to(node, NTT_ADD);
2442         CtdlLogPrintf(CTDL_NOTICE, "Network node <%s> logged in from %s [%s]\n",
2443                 CC->net_node, CC->cs_host, CC->cs_addr
2444         );
2445         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CC->net_node);
2446 }
2447
2448
2449 int network_room_handler (struct ctdlroom *room)
2450 {
2451         network_queue_room(room, NULL);
2452         return 0;
2453 }
2454
2455 void *ignet_thread(void *arg) {
2456         struct CitContext ignet_thread_CC;
2457
2458         CtdlLogPrintf(CTDL_DEBUG, "ignet_thread() initializing\n");
2459         CtdlFillSystemContext(&ignet_thread_CC, "IGnet Queue");
2460         citthread_setspecific(MyConKey, (void *)&ignet_thread_CC);
2461
2462         while (!CtdlThreadCheckStop()) {
2463                 network_do_queue();
2464                 CtdlThreadSleep(60);
2465         }
2466
2467         CtdlClearSystemContext();
2468         return(NULL);
2469 }
2470
2471
2472
2473
2474 /*
2475  * Module entry point
2476  */
2477 CTDL_MODULE_INIT(network)
2478 {
2479         if (!threading)
2480         {
2481                 create_spool_dirs();
2482                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
2483                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
2484                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
2485                 CtdlRegisterProtoHook(cmd_nsyn, "NSYN", "Synchronize room to node");
2486                 CtdlRegisterRoomHook(network_room_handler);
2487                 CtdlRegisterCleanupHook(destroy_network_queue_room);
2488                 CtdlThreadCreate("SMTP Send", CTDLTHREAD_BIGSTACK, ignet_thread, NULL);
2489         }
2490         return "network";
2491 }