citadel/modules/network/serv_netspool.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2012 by the citadel.org team
   6  *
   7  *  This program is open source software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License, version 3.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  16  * This is a fairly high-level type of critical section.  It ensures that no
  17  * two threads work on the netconfigs files at the same time.  Since we do
  18  * so many things inside these, here are the rules:
  19  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  20  *  2. Do *not* perform any I/O with the client during these sections.
  21  *
  22  */
  23
  24 /*
  25  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  26  * requests that have not been confirmed will be deleted.
  27  */
  28 #define EXP     259200  /* three days */
  29
  30 #include "sysdep.h"
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <fcntl.h>
  35 #include <ctype.h>
  36 #include <signal.h>
  37 #include <pwd.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <dirent.h>
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52 #ifdef HAVE_SYSCALL_H
  53 # include <syscall.h>
  54 #else
  55 # if HAVE_SYS_SYSCALL_H
  56 #  include <sys/syscall.h>
  57 # endif
  58 #endif
  59
  60 #include <sys/wait.h>
  61 #include <string.h>
  62 #include <limits.h>
  63 #include <libcitadel.h>
  64 #include "citadel.h"
  65 #include "server.h"
  66 #include "citserver.h"
  67 #include "support.h"
  68 #include "config.h"
  69 #include "user_ops.h"
  70 #include "database.h"
  71 #include "msgbase.h"
  72 #include "internet_addressing.h"
  73 #include "serv_network.h"
  74 #include "clientsocket.h"
  75 #include "citadel_dirs.h"
  76 #include "threads.h"
  77 #include "context.h"
  78
  79 #include "ctdl_module.h"
  80
  81 #include "netspool.h"
  82 #include "netmail.h"
  83
  84
  85 #ifndef DT_UNKNOWN
  86 #define DT_UNKNOWN     0
  87 #define DT_DIR         4
  88 #define DT_REG         8
  89 #define DT_LNK         10
  90
  91 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
  92 #define DTTOIF(dirtype)        ((dirtype) << 12)
  93 #endif
  94
  95
  96 void ParseLastSent(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
  97 {
  98         RoomNetCfgLine *nptr;
  99         nptr = (RoomNetCfgLine *)
 100                 malloc(sizeof(RoomNetCfgLine));
 101         memset(nptr, 0, sizeof(RoomNetCfgLine));
 102         OneRNCFG->lastsent = extract_long(LinePos, 0);
 103         OneRNCFG->NetConfigs[ThisOne->C] = nptr;
 104 }
 105
 106 void ParseRoomAlias(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *rncfg)
 107 {
 108         if (rncfg->Sender != NULL)
 109                 return;
 110
 111         ParseGeneric(ThisOne, Line, LinePos, rncfg);
 112         rncfg->Sender = NewStrBufDup(rncfg->NetConfigs[roommailalias]->Value[0]);
 113 }
 114
 115 void ParseSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 116 {
 117         if (time(NULL) - extract_long(LinePos, 3) > EXP)
 118                 return; /* expired subscription... */
 119
 120         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 121 }
 122 void ParseUnSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 123 {
 124         if (time(NULL) - extract_long(LinePos, 2) > EXP)
 125                 return; /* expired subscription... */
 126
 127         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 128 }
 129
 130
 131 void SerializeLastSent(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *RNCfg, RoomNetCfgLine *data)
 132 {
 133         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 134         StrBufAppendPrintf(OutputBuffer, "|%ld\n", RNCfg->lastsent);
 135 }
 136
 137 void DeleteLastSent(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 138 {
 139         free(*data);
 140         *data = NULL;
 141 }
 142
 143 static const RoomNetCfg SpoolCfgs [4] = {
 144         listrecp,
 145         digestrecp,
 146         participate,
 147         ignet_push_share
 148 };
 149
 150 static const long SpoolCfgsCopyN [4] = {
 151         1, 1, 1, 2
 152 };
 153
 154 int HaveSpoolConfig(OneRoomNetCfg* RNCfg)
 155 {
 156         int i;
 157         int interested = 0;
 158         for (i=0; i < 4; i++) if (RNCfg->NetConfigs[SpoolCfgs[i]] == NULL) interested = 1;
 159         return interested;
 160 }
 161
 162 void Netmap_AddMe(struct CtdlMessage *msg, const char *defl, long defllen)
 163 {
 164         long node_len;
 165         char buf[SIZ];
 166
 167         /* prepend our node to the path */
 168         if (CM_IsEmpty(msg, eMessagePath)) {
 169                 CM_SetField(msg, eMessagePath, defl, defllen);
 170         }
 171         node_len = configlen.c_nodename;
 172         if (node_len >= SIZ)
 173                 node_len = SIZ - 1;
 174         memcpy(buf, config.c_nodename, node_len);
 175         buf[node_len] = '!';
 176         buf[node_len + 1] = '\0';
 177         CM_PrependToField(msg, eMessagePath, buf, node_len + 1);
 178 }
 179
 180 void InspectQueuedRoom(SpoolControl **pSC,
 181                        RoomProcList *room_to_spool,
 182                        HashList *working_ignetcfg,
 183                        HashList *the_netmap)
 184 {
 185         struct CitContext *CCC = CC;
 186         SpoolControl *sc;
 187         int i = 0;
 188
 189         sc = (SpoolControl*)malloc(sizeof(SpoolControl));
 190         memset(sc, 0, sizeof(SpoolControl));
 191         sc->RNCfg = room_to_spool->OneRNCfg;
 192         sc->lastsent = room_to_spool->lastsent;
 193         sc->working_ignetcfg = working_ignetcfg;
 194         sc->the_netmap = the_netmap;
 195
 196         /*
 197          * If the room doesn't exist, don't try to perform its networking tasks.
 198          * Normally this should never happen, but once in a while maybe a room gets
 199          * queued for networking and then deleted before it can happen.
 200          */
 201         if (CtdlGetRoom(&sc->room, room_to_spool->name) != 0) {
 202                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 203                 free(sc);
 204                 return;
 205         }
 206         if (sc->room.QRhighest <= sc->lastsent)
 207         {
 208                 QN_syslog(LOG_DEBUG, "nothing to do for <%s>\n", room_to_spool->name);
 209                 free(sc);
 210                 return;
 211         }
 212
 213         begin_critical_section(S_NETCONFIGS);
 214         if (sc->RNCfg == NULL)
 215                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 216
 217         if (!HaveSpoolConfig(sc->RNCfg))
 218         {
 219                 end_critical_section(S_NETCONFIGS);
 220                 free(sc);
 221                 /* nothing to do for this room... */
 222                 return;
 223         }
 224
 225         /* Now lets remember whats needed for the actual work... */
 226
 227         for (i=0; i < 4; i++)
 228         {
 229                 aggregate_recipients(&sc->Users[SpoolCfgs[i]],
 230                                      SpoolCfgs[i],
 231                                      sc->RNCfg,
 232                                      SpoolCfgsCopyN[i]);
 233         }
 234
 235         if (StrLength(sc->RNCfg->Sender) > 0)
 236                 sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
 237         end_critical_section(S_NETCONFIGS);
 238
 239         sc->next = *pSC;
 240         *pSC = sc;
 241
 242 }
 243
 244 void CalcListID(SpoolControl *sc)
 245 {
 246         StrBuf *RoomName;
 247         const char *err;
 248         int fd;
 249         struct CitContext *CCC = CC;
 250         char filename[PATH_MAX];
 251 #define MAX_LISTIDLENGTH 150
 252
 253         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 254         fd = open(filename, 0);
 255
 256         if (fd > 0) {
 257                 struct stat stbuf;
 258
 259                 if ((fstat(fd, &stbuf) == 0) &&
 260                     (stbuf.st_size > 0))
 261                 {
 262                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 263                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 264                 }
 265                 close(fd);
 266         }
 267
 268         sc->ListID = NewStrBufPlain(NULL, 1024);
 269         if (StrLength(sc->RoomInfo) > 0)
 270         {
 271                 const char *Pos = NULL;
 272                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 273
 274                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 275                 {
 276                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 277                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 278                 }
 279                 StrBufAsciify(sc->ListID, ' ');
 280         }
 281         else
 282         {
 283                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 284         }
 285
 286         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 287         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 288         StrBufAsciify(RoomName, '_');
 289         StrBufReplaceChars(RoomName, ' ', '_');
 290
 291         if (StrLength(sc->Users[roommailalias]) > 0)
 292         {
 293                 long Pos;
 294                 const char *AtPos;
 295
 296                 Pos = StrLength(sc->ListID);
 297                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 298                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 299
 300                 if (AtPos != NULL)
 301                 {
 302                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 303                 }
 304         }
 305         else
 306         {
 307                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 308                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 309                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 310                 StrBufAppendBufPlain(sc->ListID, config.c_fqdn, -1, 0);
 311                 /*
 312                  * this used to be:
 313                  * roomname <Room-Number.list-id.fqdn>
 314                  * according to rfc2919.txt it only has to be a uniq identifier
 315                  * under the domain of the system;
 316                  * in general MUAs use it to calculate the reply address nowadays.
 317                  */
 318         }
 319         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 320
 321         if (StrLength(sc->Users[roommailalias]) == 0)
 322         {
 323                 sc->Users[roommailalias] = NewStrBuf();
 324
 325                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 326                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 327                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 328                 StrBufAppendBufPlain(sc->Users[roommailalias], config.c_fqdn, -1, 0);
 329
 330                 StrBufLowerCase(sc->Users[roommailalias]);
 331         }
 332
 333         FreeStrBuf(&RoomName);
 334 }
 335
 336 static time_t last_digest_delivery = 0;
 337
 338 /*
 339  * Batch up and send all outbound traffic from the current room
 340  */
 341 void network_spoolout_room(SpoolControl *sc)
 342 {
 343         struct CitContext *CCC = CC;
 344         char buf[SIZ];
 345         int i;
 346         long lastsent;
 347
 348         /*
 349          * If the room doesn't exist, don't try to perform its networking tasks.
 350          * Normally this should never happen, but once in a while maybe a room gets
 351          * queued for networking and then deleted before it can happen.
 352          */
 353         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 354
 355         syslog(LOG_INFO, "Networking started for <%s>\n", CCC->room.QRname);
 356
 357         CalcListID(sc);
 358
 359         /* remember where we started... */
 360         lastsent = sc->lastsent;
 361
 362         /* Fetch the messages we ought to send & prepare them. */
 363         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 364                 network_spool_msg, sc);
 365
 366         if (StrLength(sc->Users[roommailalias]) > 0)
 367         {
 368                 long len;
 369                 len = StrLength(sc->Users[roommailalias]);
 370                 if (len + 1 > sizeof(buf))
 371                         len = sizeof(buf) - 1;
 372                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 373                 buf[len] = '\0';
 374         }
 375         else
 376         {
 377                 snprintf(buf, sizeof buf, "room_%s@%s",
 378                          CCC->room.QRname, config.c_fqdn);
 379         }
 380
 381         for (i=0; buf[i]; ++i) {
 382                 buf[i] = tolower(buf[i]);
 383                 if (isspace(buf[i])) buf[i] = '_';
 384         }
 385
 386
 387         /* If we wrote a digest, deliver it and then close it */
 388         if (sc->Users[digestrecp] != NULL) {
 389                 time_t now = time(NULL);
 390                 time_t secs_today = now % (24 * 60 * 60);
 391                 long delta = 0;
 392
 393                 if (last_digest_delivery != 0) {
 394                         delta = now - last_digest_delivery;
 395                         delta = (24 * 60 * 60) - delta;
 396                 }
 397
 398                 if ((secs_today < 300) &&
 399                     (delta < 300))
 400                 {
 401                         if (sc->digestfp == NULL) {
 402                                 sc->digestfp = create_digest_file(&sc->room, 0);
 403                         }
 404                         if (sc->digestfp != NULL) {
 405                                 last_digest_delivery = now;
 406                                 fprintf(sc->digestfp,
 407                                         " -----------------------------------"
 408                                         "------------------------------------"
 409                                         "-------\n"
 410                                         "You are subscribed to the '%s' "
 411                                         "list.\n"
 412                                         "To post to the list: %s\n",
 413                                         CCC->room.QRname, buf
 414                                         );
 415                                 network_deliver_digest(sc);     /* deliver */
 416                                 remove_digest_file(&sc->room);
 417                         }
 418                 }
 419         }
 420         if (sc->digestfp != NULL) {
 421                 fclose(sc->digestfp);
 422                 sc->digestfp = NULL;
 423         }
 424
 425         /* Now rewrite the config file */
 426         if (sc->lastsent != lastsent)
 427         {
 428                 begin_critical_section(S_NETCONFIGS);
 429                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 430
 431                 sc->RNCfg->lastsent = sc->lastsent;
 432                 sc->RNCfg->changed = 1;
 433                 end_critical_section(S_NETCONFIGS);
 434         }
 435 }
 436
 437 /*
 438  * Process a buffer containing a single message from a single file
 439  * from the inbound queue
 440  */
 441 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 442 {
 443         long len;
 444         struct CitContext *CCC = CC;
 445         StrBuf *Buf = NULL;
 446         struct CtdlMessage *msg = NULL;
 447         long pos;
 448         int field;
 449         recptypes *recp = NULL;
 450         char target_room[ROOMNAMELEN];
 451         struct ser_ret sermsg;
 452         char filename[PATH_MAX];
 453         FILE *fp;
 454         const StrBuf *nexthop = NULL;
 455         unsigned char firstbyte;
 456         unsigned char lastbyte;
 457
 458         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 459
 460         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 461         firstbyte = buffer[0];
 462         lastbyte = buffer[size-1];
 463         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 464                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 465                           size, firstbyte, lastbyte);
 466                 return;
 467         }
 468
 469         /* Set default target room to trash */
 470         strcpy(target_room, TWITROOM);
 471
 472         /* Load the message into memory */
 473         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 474         memset(msg, 0, sizeof(struct CtdlMessage));
 475         msg->cm_magic = CTDLMESSAGE_MAGIC;
 476         msg->cm_anon_type = buffer[1];
 477         msg->cm_format_type = buffer[2];
 478
 479         for (pos = 3; pos < size; ++pos) {
 480                 field = buffer[pos];
 481                 len = strlen(buffer + pos + 1);
 482                 CM_SetField(msg, field, buffer + pos + 1, len);
 483                 pos = pos + len + 1;
 484         }
 485
 486         /* Check for message routing */
 487         if (!CM_IsEmpty(msg, eDestination)) {
 488                 if (strcasecmp(msg->cm_fields[eDestination], config.c_nodename)) {
 489
 490                         /* route the message */
 491                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 492                         if (CtdlIsValidNode(&nexthop,
 493                                             NULL,
 494                                             Buf,
 495                                             working_ignetcfg,
 496                                             the_netmap) == 0)
 497                         {
 498                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 499
 500                                 /* serialize the message */
 501                                 CtdlSerializeMessage(&sermsg, msg);
 502
 503                                 /* now send it */
 504                                 if (StrLength(nexthop) == 0) {
 505                                         nexthop = Buf;
 506                                 }
 507                                 snprintf(filename,
 508                                          sizeof filename,
 509                                          "%s/%s@%lx%x",
 510                                          ctdl_netout_dir,
 511                                          ChrPtr(nexthop),
 512                                          time(NULL),
 513                                          rand()
 514                                 );
 515                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 516                                 fp = fopen(filename, "ab");
 517                                 if (fp != NULL) {
 518                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 519                                         fclose(fp);
 520                                 }
 521                                 else {
 522                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 523                                 }
 524                                 free(sermsg.ser);
 525                                 CM_Free(msg);
 526                                 FreeStrBuf(&Buf);
 527                                 return;
 528                         }
 529
 530                         else {  /* invalid destination node name */
 531                                 FreeStrBuf(&Buf);
 532
 533                                 network_bounce(msg,
 534 "A message you sent could not be delivered due to an invalid destination node"
 535 " name.  Please check the address and try sending the message again.\n");
 536                                 msg = NULL;
 537                                 return;
 538
 539                         }
 540                 }
 541         }
 542
 543         /*
 544          * Check to see if we already have a copy of this message, and
 545          * abort its processing if so.  (We used to post a warning to Aide>
 546          * every time this happened, but the network is now so densely
 547          * connected that it's inevitable.)
 548          */
 549         if (network_usetable(msg) != 0) {
 550                 CM_Free(msg);
 551                 return;
 552         }
 553
 554         /* Learn network topology from the path */
 555         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 556                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 557                                      msg->cm_fields[eMessagePath],
 558                                      the_netmap,
 559                                      netmap_changed);
 560         }
 561
 562         /* Is the sending node giving us a very persuasive suggestion about
 563          * which room this message should be saved in?  If so, go with that.
 564          */
 565         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 566                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 567         }
 568
 569         /* Otherwise, does it have a recipient?  If so, validate it... */
 570         else if (!CM_IsEmpty(msg, eRecipient)) {
 571                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 572                 if (recp != NULL) if (recp->num_error != 0) {
 573                         network_bounce(msg,
 574                                 "A message you sent could not be delivered due to an invalid address.\n"
 575                                 "Please check the address and try sending the message again.\n");
 576                         msg = NULL;
 577                         free_recipients(recp);
 578                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 579                         return;
 580                 }
 581                 strcpy(target_room, "");        /* no target room if mail */
 582         }
 583
 584         /* Our last shot at finding a home for this message is to see if
 585          * it has the eOriginalRoom (O) field (Originating room) set.
 586          */
 587         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 588                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 589         }
 590
 591         /* Strip out fields that are only relevant during transit */
 592         CM_FlushField(msg, eDestination);
 593         CM_FlushField(msg, eRemoteRoom);
 594
 595         /* save the message into a room */
 596         if (PerformNetprocHooks(msg, target_room) == 0) {
 597                 msg->cm_flags = CM_SKIP_HOOKS;
 598                 CtdlSubmitMsg(msg, recp, target_room, 0);
 599         }
 600         CM_Free(msg);
 601         free_recipients(recp);
 602 }
 603
 604
 605 /*
 606  * Process a single message from a single file from the inbound queue
 607  */
 608 void network_process_message(FILE *fp,
 609                              long msgstart,
 610                              long msgend,
 611                              HashList *working_ignetcfg,
 612                              HashList *the_netmap,
 613                              int *netmap_changed)
 614 {
 615         long hold_pos;
 616         long size;
 617         char *buffer;
 618
 619         hold_pos = ftell(fp);
 620         size = msgend - msgstart + 1;
 621         buffer = malloc(size);
 622         if (buffer != NULL) {
 623                 fseek(fp, msgstart, SEEK_SET);
 624                 if (fread(buffer, size, 1, fp) > 0) {
 625                         network_process_buffer(buffer,
 626                                                size,
 627                                                working_ignetcfg,
 628                                                the_netmap,
 629                                                netmap_changed);
 630                 }
 631                 free(buffer);
 632         }
 633
 634         fseek(fp, hold_pos, SEEK_SET);
 635 }
 636
 637
 638 /*
 639  * Process a single file from the inbound queue
 640  */
 641 void network_process_file(char *filename,
 642                           HashList *working_ignetcfg,
 643                           HashList *the_netmap,
 644                           int *netmap_changed)
 645 {
 646         struct CitContext *CCC = CC;
 647         FILE *fp;
 648         long msgstart = (-1L);
 649         long msgend = (-1L);
 650         long msgcur = 0L;
 651         int ch;
 652         int nMessages = 0;
 653
 654         fp = fopen(filename, "rb");
 655         if (fp == NULL) {
 656                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 657                 return;
 658         }
 659
 660         fseek(fp, 0L, SEEK_END);
 661         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 662         rewind(fp);
 663
 664         /* Look for messages in the data stream and break them out */
 665         while (ch = getc(fp), ch >= 0) {
 666
 667                 if (ch == 255) {
 668                         if (msgstart >= 0L) {
 669                                 msgend = msgcur - 1;
 670                                 network_process_message(fp,
 671                                                         msgstart,
 672                                                         msgend,
 673                                                         working_ignetcfg,
 674                                                         the_netmap,
 675                                                         netmap_changed);
 676                         }
 677                         msgstart = msgcur;
 678                 }
 679
 680                 ++msgcur;
 681                 nMessages ++;
 682         }
 683
 684         msgend = msgcur - 1;
 685         if (msgstart >= 0L) {
 686                 network_process_message(fp,
 687                                         msgstart,
 688                                         msgend,
 689                                         working_ignetcfg,
 690                                         the_netmap,
 691                                         netmap_changed);
 692                 nMessages ++;
 693         }
 694
 695         if (nMessages > 0)
 696                 QN_syslog(LOG_INFO,
 697                           "network: processed %d messages in %s\n",
 698                           nMessages,
 699                           filename);
 700
 701         fclose(fp);
 702         unlink(filename);
 703 }
 704
 705
 706 /*
 707  * Process anything in the inbound queue
 708  */
 709 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 710 {
 711         struct CitContext *CCC = CC;
 712         DIR *dp;
 713         struct dirent *d;
 714         struct dirent *filedir_entry;
 715         struct stat statbuf;
 716         char filename[PATH_MAX];
 717         static time_t last_spoolin_mtime = 0L;
 718         int d_type = 0;
 719         int d_namelen;
 720
 721         /*
 722          * Check the spoolin directory's modification time.  If it hasn't
 723          * been touched, we don't need to scan it.
 724          */
 725         if (stat(ctdl_netin_dir, &statbuf)) return;
 726         if (statbuf.st_mtime == last_spoolin_mtime) {
 727                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 728                 return;
 729         }
 730         last_spoolin_mtime = statbuf.st_mtime;
 731         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 732
 733         /*
 734          * Ok, there's something interesting in there, so scan it.
 735          */
 736         dp = opendir(ctdl_netin_dir);
 737         if (dp == NULL) return;
 738
 739         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 740         if (d == NULL) {
 741                 closedir(dp);
 742                 return;
 743         }
 744
 745         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 746                (filedir_entry != NULL))
 747         {
 748 #ifdef _DIRENT_HAVE_D_NAMLEN
 749                 d_namelen = filedir_entry->d_namlen;
 750
 751 #else
 752                 d_namelen = strlen(filedir_entry->d_name);
 753 #endif
 754
 755 #ifdef _DIRENT_HAVE_D_TYPE
 756                 d_type = filedir_entry->d_type;
 757 #else
 758                 d_type = DT_UNKNOWN;
 759 #endif
 760                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 761                         continue; /* Ignore backup files... */
 762
 763                 if ((d_namelen == 1) &&
 764                     (filedir_entry->d_name[0] == '.'))
 765                         continue;
 766
 767                 if ((d_namelen == 2) &&
 768                     (filedir_entry->d_name[0] == '.') &&
 769                     (filedir_entry->d_name[1] == '.'))
 770                         continue;
 771
 772                 if (d_type == DT_UNKNOWN) {
 773                         struct stat s;
 774                         char path[PATH_MAX];
 775
 776                         snprintf(path,
 777                                  PATH_MAX,
 778                                  "%s/%s",
 779                                  ctdl_netin_dir,
 780                                  filedir_entry->d_name);
 781
 782                         if (lstat(path, &s) == 0) {
 783                                 d_type = IFTODT(s.st_mode);
 784                         }
 785                 }
 786
 787                 switch (d_type)
 788                 {
 789                 case DT_DIR:
 790                         break;
 791                 case DT_LNK: /* TODO: check whether its a file or a directory */
 792                 case DT_REG:
 793                         snprintf(filename,
 794                                 sizeof filename,
 795                                 "%s/%s",
 796                                 ctdl_netin_dir,
 797                                 d->d_name
 798                         );
 799                         network_process_file(filename,
 800                                              working_ignetcfg,
 801                                              the_netmap,
 802                                              netmap_changed);
 803                 }
 804         }
 805
 806         closedir(dp);
 807         free(d);
 808 }
 809
 810 /*
 811  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 812  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 813  */
 814 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 815 {
 816         struct CitContext *CCC = CC;
 817         IOBuffer IOB;
 818         FDIOBuffer FDIO;
 819         int d_namelen;
 820         DIR *dp;
 821         struct dirent *d;
 822         struct dirent *filedir_entry;
 823         const char *pch;
 824         char spooloutfilename[PATH_MAX];
 825         char filename[PATH_MAX];
 826         const StrBuf *nexthop;
 827         StrBuf *NextHop;
 828         int i;
 829         struct stat statbuf;
 830         int nFailed = 0;
 831         int d_type = 0;
 832
 833
 834         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 835         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 836         if (d == NULL)  return;
 837
 838         dp = opendir(ctdl_netout_dir);
 839         if (dp == NULL) {
 840                 free(d);
 841                 return;
 842         }
 843
 844         NextHop = NewStrBuf();
 845         memset(&IOB, 0, sizeof(IOBuffer));
 846         memset(&FDIO, 0, sizeof(FDIOBuffer));
 847         FDIO.IOB = &IOB;
 848
 849         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 850                (filedir_entry != NULL))
 851         {
 852 #ifdef _DIRENT_HAVE_D_NAMLEN
 853                 d_namelen = filedir_entry->d_namlen;
 854
 855 #else
 856                 d_namelen = strlen(filedir_entry->d_name);
 857 #endif
 858
 859 #ifdef _DIRENT_HAVE_D_TYPE
 860                 d_type = filedir_entry->d_type;
 861 #else
 862                 d_type = DT_UNKNOWN;
 863 #endif
 864                 if (d_type == DT_DIR)
 865                         continue;
 866
 867                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 868                         continue; /* Ignore backup files... */
 869
 870                 if ((d_namelen == 1) &&
 871                     (filedir_entry->d_name[0] == '.'))
 872                         continue;
 873
 874                 if ((d_namelen == 2) &&
 875                     (filedir_entry->d_name[0] == '.') &&
 876                     (filedir_entry->d_name[1] == '.'))
 877                         continue;
 878
 879                 pch = strchr(filedir_entry->d_name, '@');
 880                 if (pch == NULL)
 881                         continue;
 882
 883                 snprintf(filename,
 884                          sizeof filename,
 885                          "%s/%s",
 886                          ctdl_netout_dir,
 887                          filedir_entry->d_name);
 888
 889                 StrBufPlain(NextHop,
 890                             filedir_entry->d_name,
 891                             pch - filedir_entry->d_name);
 892
 893                 snprintf(spooloutfilename,
 894                          sizeof spooloutfilename,
 895                          "%s/%s",
 896                          ctdl_netout_dir,
 897                          ChrPtr(NextHop));
 898
 899                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
 900                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
 901                         nFailed++;
 902                         QN_syslog(LOG_DEBUG,
 903                                   "Currently online with %s - skipping for now\n",
 904                                   ChrPtr(NextHop)
 905                                 );
 906                 }
 907                 else {
 908                         size_t dsize;
 909                         size_t fsize;
 910                         int infd, outfd;
 911                         const char *err = NULL;
 912                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
 913
 914                         infd = open(filename, O_RDONLY);
 915                         if (infd == -1) {
 916                                 nFailed++;
 917                                 QN_syslog(LOG_ERR,
 918                                           "failed to open %s for reading due to %s; skipping.\n",
 919                                           filename, strerror(errno)
 920                                         );
 921                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
 922                                 continue;
 923                         }
 924
 925                         outfd = open(spooloutfilename,
 926                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
 927                                   S_IRUSR|S_IWUSR);
 928                         if (outfd == -1)
 929                         {
 930                                 outfd = open(spooloutfilename,
 931                                              O_EXCL|O_NONBLOCK|O_WRONLY,
 932                                              S_IRUSR | S_IWUSR);
 933                         }
 934                         if (outfd == -1) {
 935                                 nFailed++;
 936                                 QN_syslog(LOG_ERR,
 937                                           "failed to open %s for reading due to %s; skipping.\n",
 938                                           spooloutfilename, strerror(errno)
 939                                         );
 940                                 close(infd);
 941                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
 942                                 continue;
 943                         }
 944
 945                         dsize = lseek(outfd, 0, SEEK_END);
 946                         lseek(outfd, -dsize, SEEK_SET);
 947
 948                         fstat(infd, &statbuf);
 949                         fsize = statbuf.st_size;
 950 /*
 951                         fsize = lseek(infd, 0, SEEK_END);
 952 */
 953                         IOB.fd = infd;
 954                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
 955                         FDIO.ChunkSendRemain = fsize;
 956                         FDIO.TotalSentAlready = dsize;
 957                         err = NULL;
 958                         errno = 0;
 959                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
 960                         if (err == NULL) {
 961                                 unlink(filename);
 962                                 QN_syslog(LOG_DEBUG,
 963                                           "Spoolfile %s now "SIZE_T_FMT" k\n",
 964                                           spooloutfilename,
 965                                           (dsize + fsize)/1024
 966                                         );
 967                         }
 968                         else {
 969                                 nFailed++;
 970                                 QN_syslog(LOG_ERR,
 971                                           "failed to append to %s [%s]; rolling back..\n",
 972                                           spooloutfilename, strerror(errno)
 973                                         );
 974                                 /* whoops partial append?? truncate spooloutfilename again! */
 975                                 ftruncate(outfd, dsize);
 976                         }
 977                         FDIOBufferDelete(&FDIO);
 978                         close(infd);
 979                         close(outfd);
 980                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
 981                 }
 982         }
 983         closedir(dp);
 984
 985         if (nFailed > 0) {
 986                 FreeStrBuf(&NextHop);
 987                 QN_syslog(LOG_INFO,
 988                           "skipping Spoolcleanup because of %d files unprocessed.\n",
 989                           nFailed
 990                         );
 991
 992                 return;
 993         }
 994
 995         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
 996         dp = opendir(ctdl_netout_dir);
 997         if (dp == NULL) {
 998                 FreeStrBuf(&NextHop);
 999                 free(d);
1000                 return;
1001         }
1002
1003         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1004                (filedir_entry != NULL))
1005         {
1006 #ifdef _DIRENT_HAVE_D_NAMLEN
1007                 d_namelen = filedir_entry->d_namlen;
1008
1009 #else
1010                 d_namelen = strlen(filedir_entry->d_name);
1011 #endif
1012
1013 #ifdef _DIRENT_HAVE_D_TYPE
1014                 d_type = filedir_entry->d_type;
1015 #else
1016                 d_type = DT_UNKNOWN;
1017 #endif
1018                 if (d_type == DT_DIR)
1019                         continue;
1020
1021                 if ((d_namelen == 1) &&
1022                     (filedir_entry->d_name[0] == '.'))
1023                         continue;
1024
1025                 if ((d_namelen == 2) &&
1026                     (filedir_entry->d_name[0] == '.') &&
1027                     (filedir_entry->d_name[1] == '.'))
1028                         continue;
1029
1030                 pch = strchr(filedir_entry->d_name, '@');
1031                 if (pch == NULL) /* no @ in name? consolidated file. */
1032                         continue;
1033
1034                 StrBufPlain(NextHop,
1035                             filedir_entry->d_name,
1036                             pch - filedir_entry->d_name);
1037
1038                 snprintf(filename,
1039                         sizeof filename,
1040                         "%s/%s",
1041                         ctdl_netout_dir,
1042                         filedir_entry->d_name
1043                 );
1044
1045                 i = CtdlIsValidNode(&nexthop,
1046                                     NULL,
1047                                     NextHop,
1048                                     working_ignetcfg,
1049                                     the_netmap);
1050
1051                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1052                         unlink(filename);
1053                 }
1054         }
1055         FreeStrBuf(&NextHop);
1056         free(d);
1057         closedir(dp);
1058 }
1059
1060 void free_spoolcontrol_struct(SpoolControl **sc)
1061 {
1062         free_spoolcontrol_struct_members(*sc);
1063         free(*sc);
1064         *sc = NULL;
1065 }
1066
1067 void free_spoolcontrol_struct_members(SpoolControl *sc)
1068 {
1069         int i;
1070         FreeStrBuf(&sc->RoomInfo);
1071         FreeStrBuf(&sc->ListID);
1072         for (i = 0; i < maxRoomNetCfg; i++)
1073                 FreeStrBuf(&sc->Users[i]);
1074 }
1075
1076
1077
1078 /*
1079  * It's ok if these directories already exist.  Just fail silently.
1080  */
1081 void create_spool_dirs(void) {
1082         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1083                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1084         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1085                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1086         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1087                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1088         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1089                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1090         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1091                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1092         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1093                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1094         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1095                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1096         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1097                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1098 }
1099
1100 /*
1101  * Module entry point
1102  */
1103 CTDL_MODULE_INIT(network_spool)
1104 {
1105         if (!threading)
1106         {
1107                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1108                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1109                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1110                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1111                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1112                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1113                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1114                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1115
1116                 create_spool_dirs();
1117 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1118         }
1119         return "network_spool";
1120 }