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) 2000-2016 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 <assert.h>
  64 #include <libcitadel.h>
  65 #include "citadel.h"
  66 #include "server.h"
  67 #include "citserver.h"
  68 #include "support.h"
  69 #include "config.h"
  70 #include "user_ops.h"
  71 #include "database.h"
  72 #include "msgbase.h"
  73 #include "internet_addressing.h"
  74 #include "serv_network.h"
  75 #include "clientsocket.h"
  76 #include "citadel_dirs.h"
  77 #include "threads.h"
  78 #include "context.h"
  79
  80 #include "ctdl_module.h"
  81
  82 #include "netspool.h"
  83 #include "netmail.h"
  84
  85
  86 #ifndef DT_UNKNOWN
  87 #define DT_UNKNOWN     0
  88 #define DT_DIR         4
  89 #define DT_REG         8
  90 #define DT_LNK         10
  91
  92 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
  93 #define DTTOIF(dirtype)        ((dirtype) << 12)
  94 #endif
  95
  96
  97 /*
  98  * Bounce a message back to the sender
  99  */
 100 void network_bounce(struct CtdlMessage **pMsg, char *reason)
 101 {
 102         char buf[SIZ];
 103         char bouncesource[SIZ];
 104         char recipient[SIZ];
 105         recptypes *valid = NULL;
 106         char force_room[ROOMNAMELEN];
 107         static int serialnum = 0;
 108         long len;
 109         struct CtdlMessage *msg = *pMsg;
 110         *pMsg = NULL;
 111         syslog(LOG_DEBUG, "entering network_bounce()");
 112
 113         if (msg == NULL) return;
 114
 115         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, CtdlGetConfigStr("c_nodename"));
 116
 117         /*
 118          * Give it a fresh message ID
 119          */
 120         len = snprintf(buf, sizeof(buf),
 121                        "%ld.%04lx.%04x@%s",
 122                        (long)time(NULL),
 123                        (long)getpid(),
 124                        ++serialnum,
 125                        CtdlGetConfigStr("c_fqdn"));
 126
 127         CM_SetField(msg, emessageId, buf, len);
 128
 129         /*
 130          * FIXME ... right now we're just sending a bounce; we really want to
 131          * include the text of the bounced message.
 132          */
 133         if (!IsEmptyStr(reason)) {
 134                 CM_SetField(msg, eMesageText, reason, strlen(reason));
 135         }
 136         msg->cm_format_type = 0;
 137
 138         /*
 139          * Turn the message around
 140          */
 141         CM_FlushField(msg, eRecipient);
 142         CM_FlushField(msg, eDestination);
 143
 144         len = snprintf(recipient, sizeof(recipient), "%s@%s",
 145                        msg->cm_fields[eAuthor],
 146                        msg->cm_fields[eNodeName]);
 147
 148         CM_SetField(msg, eAuthor, HKEY(BOUNCESOURCE));
 149         CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
 150         CM_SetField(msg, eMsgSubject, HKEY("Delivery Status Notification (Failure)"));
 151
 152         Netmap_AddMe(msg, HKEY("unknown_user"));
 153
 154         /* Now submit the message */
 155         valid = validate_recipients(recipient, NULL, 0);
 156         if (valid != NULL) if (valid->num_error != 0) {
 157                 free_recipients(valid);
 158                 valid = NULL;
 159         }
 160         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 161                 strcpy(force_room, CtdlGetConfigStr("c_aideroom"));
 162         }
 163         else {
 164                 strcpy(force_room, "");
 165         }
 166         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
 167                 strcpy(force_room, CtdlGetConfigStr("c_aideroom"));
 168         }
 169         CtdlSubmitMsg(msg, valid, force_room, 0);
 170
 171         /* Clean up */
 172         if (valid != NULL) free_recipients(valid);
 173         CM_Free(msg);
 174         syslog(LOG_DEBUG, "leaving network_bounce()");
 175 }
 176
 177
 178 void ParseLastSent(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 179 {
 180         RoomNetCfgLine *nptr;
 181         nptr = (RoomNetCfgLine *)
 182                 malloc(sizeof(RoomNetCfgLine));
 183         memset(nptr, 0, sizeof(RoomNetCfgLine));
 184         OneRNCFG->lastsent = extract_long(LinePos, 0);
 185         OneRNCFG->NetConfigs[ThisOne->C] = nptr;
 186 }
 187
 188 void ParseRoomAlias(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *rncfg)
 189 {
 190         if (rncfg->Sender != NULL)
 191                 return;
 192
 193         ParseGeneric(ThisOne, Line, LinePos, rncfg);
 194         rncfg->Sender = NewStrBufDup(rncfg->NetConfigs[roommailalias]->Value[0]);
 195 }
 196
 197 void ParseSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 198 {
 199         if (time(NULL) - extract_long(LinePos, 3) > EXP)
 200                 return; /* expired subscription... */
 201
 202         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 203 }
 204 void ParseUnSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 205 {
 206         if (time(NULL) - extract_long(LinePos, 2) > EXP)
 207                 return; /* expired subscription... */
 208
 209         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 210 }
 211
 212
 213 void SerializeLastSent(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *RNCfg, RoomNetCfgLine *data)
 214 {
 215         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 216         StrBufAppendPrintf(OutputBuffer, "|%ld\n", RNCfg->lastsent);
 217 }
 218
 219 void DeleteLastSent(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 220 {
 221         free(*data);
 222         *data = NULL;
 223 }
 224
 225 static const RoomNetCfg SpoolCfgs [4] = {
 226         listrecp,
 227         digestrecp,
 228         participate,
 229         ignet_push_share
 230 };
 231
 232 static const long SpoolCfgsCopyN [4] = {
 233         1, 1, 1, 2
 234 };
 235
 236 int HaveSpoolConfig(OneRoomNetCfg* RNCfg)
 237 {
 238         int i;
 239         int interested = 0;
 240         for (i=0; i < 4; i++) if (RNCfg->NetConfigs[SpoolCfgs[i]] == NULL) interested = 1;
 241         return interested;
 242 }
 243
 244 void Netmap_AddMe(struct CtdlMessage *msg, const char *defl, long defllen)
 245 {
 246         long node_len;
 247         char buf[SIZ];
 248
 249         /* prepend our node to the path */
 250         if (CM_IsEmpty(msg, eMessagePath)) {
 251                 CM_SetField(msg, eMessagePath, defl, defllen);
 252         }
 253         node_len = strlen(CtdlGetConfigStr("c_nodename"));
 254         if (node_len >= SIZ)
 255                 node_len = SIZ - 1;
 256         memcpy(buf, CtdlGetConfigStr("c_nodename"), node_len);
 257         buf[node_len] = '!';
 258         buf[node_len + 1] = '\0';
 259         CM_PrependToField(msg, eMessagePath, buf, node_len + 1);
 260 }
 261
 262 void InspectQueuedRoom(SpoolControl **pSC,
 263                        RoomProcList *room_to_spool,
 264                        HashList *working_ignetcfg,
 265                        HashList *the_netmap)
 266 {
 267         SpoolControl *sc;
 268         int i = 0;
 269
 270         syslog(LOG_INFO, "InspectQueuedRoom(%s)", room_to_spool->name);
 271
 272         sc = (SpoolControl*)malloc(sizeof(SpoolControl));
 273         memset(sc, 0, sizeof(SpoolControl));
 274         sc->lastsent = room_to_spool->lastsent;
 275         sc->working_ignetcfg = working_ignetcfg;
 276         sc->the_netmap = the_netmap;
 277
 278         /*
 279          * If the room doesn't exist, don't try to perform its networking tasks.
 280          * Normally this should never happen, but once in a while maybe a room gets
 281          * queued for networking and then deleted before it can happen.
 282          */
 283         if (CtdlGetRoom(&sc->room, room_to_spool->name) != 0) {
 284                 syslog(LOG_INFO, "ERROR: cannot load <%s>", room_to_spool->name);
 285                 free(sc);
 286                 return;
 287         }
 288
 289         assert(sc->RNCfg == NULL);      // checking to make sure we cleared it from last time
 290
 291         sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 292
 293         syslog(LOG_DEBUG, "Room <%s> highest=%ld lastsent=%ld", room_to_spool->name, sc->room.QRhighest, sc->RNCfg->lastsent);
 294         if ( (!HaveSpoolConfig(sc->RNCfg)) || (sc->room.QRhighest <= sc->RNCfg->lastsent) )
 295         {
 296                 // There is nothing to send from this room.
 297                 syslog(LOG_DEBUG, "nothing to do for <%s>", room_to_spool->name);
 298                 FreeRoomNetworkStruct(&sc->RNCfg);
 299                 sc->RNCfg = NULL;
 300                 free(sc);
 301                 return;
 302         }
 303
 304         sc->lastsent = sc->RNCfg->lastsent;
 305
 306         /* Now lets remember whats needed for the actual work... */
 307
 308         for (i=0; i < 4; i++)
 309         {
 310                 aggregate_recipients(&sc->Users[SpoolCfgs[i]], SpoolCfgs[i], sc->RNCfg, SpoolCfgsCopyN[i]);
 311         }
 312
 313         if (StrLength(sc->RNCfg->Sender) > 0) {
 314                 sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
 315         }
 316
 317         sc->next = *pSC;
 318         *pSC = sc;
 319
 320         FreeRoomNetworkStruct(&sc->RNCfg);      // done with this for now, we'll grab it again next time
 321         sc->RNCfg = NULL;
 322 }
 323
 324
 325 void CalcListID(SpoolControl *sc)
 326 {
 327         StrBuf *RoomName;
 328         const char *err;
 329         int fd;
 330         struct CitContext *CCC = CC;
 331         char filename[PATH_MAX];
 332 #define MAX_LISTIDLENGTH 150
 333
 334         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 335         fd = open(filename, 0);
 336
 337         if (fd > 0) {
 338                 struct stat stbuf;
 339
 340                 if ((fstat(fd, &stbuf) == 0) &&
 341                     (stbuf.st_size > 0))
 342                 {
 343                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 344                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 345                 }
 346                 close(fd);
 347         }
 348
 349         sc->ListID = NewStrBufPlain(NULL, 1024);
 350         if (StrLength(sc->RoomInfo) > 0)
 351         {
 352                 const char *Pos = NULL;
 353                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 354
 355                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 356                 {
 357                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 358                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 359                 }
 360                 StrBufAsciify(sc->ListID, ' ');
 361         }
 362         else
 363         {
 364                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 365         }
 366
 367         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 368         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 369         StrBufAsciify(RoomName, '_');
 370         StrBufReplaceChars(RoomName, ' ', '_');
 371
 372         if (StrLength(sc->Users[roommailalias]) > 0)
 373         {
 374                 long Pos;
 375                 const char *AtPos;
 376
 377                 Pos = StrLength(sc->ListID);
 378                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 379                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 380
 381                 if (AtPos != NULL)
 382                 {
 383                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 384                 }
 385         }
 386         else
 387         {
 388                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 389                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 390                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 391                 StrBufAppendBufPlain(sc->ListID, CtdlGetConfigStr("c_fqdn"), -1, 0);
 392                 /*
 393                  * this used to be:
 394                  * roomname <Room-Number.list-id.fqdn>
 395                  * according to rfc2919.txt it only has to be a uniq identifier
 396                  * under the domain of the system;
 397                  * in general MUAs use it to calculate the reply address nowadays.
 398                  */
 399         }
 400         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 401
 402         if (StrLength(sc->Users[roommailalias]) == 0)
 403         {
 404                 sc->Users[roommailalias] = NewStrBuf();
 405
 406                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 407                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 408                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 409                 StrBufAppendBufPlain(sc->Users[roommailalias], CtdlGetConfigStr("c_fqdn"), -1, 0);
 410
 411                 StrBufLowerCase(sc->Users[roommailalias]);
 412         }
 413
 414         FreeStrBuf(&RoomName);
 415 }
 416
 417 static time_t last_digest_delivery = 0;
 418
 419 /*
 420  * Batch up and send all outbound traffic from the current room
 421  */
 422 void network_spoolout_room(SpoolControl *sc)
 423 {
 424         struct CitContext *CCC = CC;
 425         char buf[SIZ];
 426         int i;
 427         long lastsent;
 428
 429         /*
 430          * If the room doesn't exist, don't try to perform its networking tasks.
 431          * Normally this should never happen, but once in a while maybe a room gets
 432          * queued for networking and then deleted before it can happen.
 433          */
 434         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 435
 436         syslog(LOG_INFO, "network_spoolout_room(%s)", CCC->room.QRname);
 437
 438         CalcListID(sc);
 439
 440         /* remember where we started... */
 441         lastsent = sc->lastsent;
 442
 443         /* Fetch the messages we ought to send & prepare them. */
 444         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 445                 network_spool_msg, sc);
 446
 447         if (StrLength(sc->Users[roommailalias]) > 0)
 448         {
 449                 long len;
 450                 len = StrLength(sc->Users[roommailalias]);
 451                 if (len + 1 > sizeof(buf))
 452                         len = sizeof(buf) - 1;
 453                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 454                 buf[len] = '\0';
 455         }
 456         else
 457         {
 458                 snprintf(buf, sizeof buf, "room_%s@%s",
 459                          CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
 460         }
 461
 462         for (i=0; buf[i]; ++i) {
 463                 buf[i] = tolower(buf[i]);
 464                 if (isspace(buf[i])) buf[i] = '_';
 465         }
 466
 467
 468         /* If we wrote a digest, deliver it and then close it */
 469         if (sc->Users[digestrecp] != NULL) {
 470                 time_t now = time(NULL);
 471                 time_t secs_today = now % (24 * 60 * 60);
 472                 long delta = 0;
 473
 474                 if (last_digest_delivery != 0) {
 475                         delta = now - last_digest_delivery;
 476                         delta = (24 * 60 * 60) - delta;
 477                 }
 478
 479                 if ((secs_today < 300) &&
 480                     (delta < 300))
 481                 {
 482                         if (sc->digestfp == NULL) {
 483                                 sc->digestfp = create_digest_file(&sc->room, 0);
 484                         }
 485                         if (sc->digestfp != NULL) {
 486                                 last_digest_delivery = now;
 487                                 fprintf(sc->digestfp,
 488                                         " -----------------------------------"
 489                                         "------------------------------------"
 490                                         "-------\n"
 491                                         "You are subscribed to the '%s' "
 492                                         "list.\n"
 493                                         "To post to the list: %s\n",
 494                                         CCC->room.QRname, buf
 495                                         );
 496                                 network_deliver_digest(sc);     /* deliver */
 497                                 remove_digest_file(&sc->room);
 498                         }
 499                 }
 500         }
 501         if (sc->digestfp != NULL) {
 502                 fclose(sc->digestfp);
 503                 sc->digestfp = NULL;
 504         }
 505
 506         /* Now rewrite the netconfig */
 507
 508         // THIS IS THE ONLY PLACE WHERE WE HAVE TO REWRITE THE NETCONFIG.
 509
 510
 511         if (sc->lastsent != lastsent)
 512         {
 513                 OneRoomNetCfg *r;
 514
 515                 begin_critical_section(S_NETCONFIGS);
 516                 r = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 517
 518                 r->lastsent = sc->lastsent;             // FIXME we have to do something here !!!!!!!
 519
 520                 SaveRoomNetConfigFile(r, sc->room.QRnumber);
 521                 FreeRoomNetworkStruct(&r);
 522                 end_critical_section(S_NETCONFIGS);
 523         }
 524 }
 525
 526
 527 /*
 528  * Check the use table.  This is a list of messages which have recently
 529  * arrived on the system.  It is maintained and queried to prevent the same
 530  * message from being entered into the database multiple times if it happens
 531  * to arrive multiple times by accident.
 532  */
 533 int network_usetable(struct CtdlMessage *msg)
 534 {
 535         StrBuf *msgid;
 536         struct CitContext *CCC = CC;
 537         time_t now;
 538
 539         /* Bail out if we can't generate a message ID */
 540         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 541         {
 542                 return(0);
 543         }
 544
 545         /* Generate the message ID */
 546         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 547         if (haschar(ChrPtr(msgid), '@') == 0) {
 548                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 549                 if (!CM_IsEmpty(msg, eNodeName)) {
 550                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 551                 }
 552                 else {
 553                         FreeStrBuf(&msgid);
 554                         return(0);
 555                 }
 556         }
 557         now = time(NULL);
 558         if (CheckIfAlreadySeen("Networker Import",
 559                                msgid,
 560                                now, 0,
 561                                eUpdate,
 562                                CCC->cs_pid, 0) != 0)
 563         {
 564                 FreeStrBuf(&msgid);
 565                 return(1);
 566         }
 567         FreeStrBuf(&msgid);
 568
 569         return(0);
 570 }
 571
 572
 573 /*
 574  * Process a buffer containing a single message from a single file
 575  * from the inbound queue
 576  */
 577 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 578 {
 579         long len;
 580         StrBuf *Buf = NULL;
 581         struct CtdlMessage *msg = NULL;
 582         long pos;
 583         int field;
 584         recptypes *recp = NULL;
 585         char target_room[ROOMNAMELEN];
 586         struct ser_ret sermsg;
 587         char filename[PATH_MAX];
 588         FILE *fp;
 589         const StrBuf *nexthop = NULL;
 590         unsigned char firstbyte;
 591         unsigned char lastbyte;
 592
 593         syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes", size);
 594
 595         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 596         firstbyte = buffer[0];
 597         lastbyte = buffer[size-1];
 598         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 599                 syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d", size, firstbyte, lastbyte);
 600                 return;
 601         }
 602
 603         /* Set default target room to trash */
 604         strcpy(target_room, TWITROOM);
 605
 606         /* Load the message into memory */
 607         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 608         memset(msg, 0, sizeof(struct CtdlMessage));
 609         msg->cm_magic = CTDLMESSAGE_MAGIC;
 610         msg->cm_anon_type = buffer[1];
 611         msg->cm_format_type = buffer[2];
 612
 613         for (pos = 3; pos < size; ++pos) {
 614                 field = buffer[pos];
 615                 len = strlen(buffer + pos + 1);
 616                 CM_SetField(msg, field, buffer + pos + 1, len);
 617                 pos = pos + len + 1;
 618         }
 619
 620         /* Check for message routing */
 621         if (!CM_IsEmpty(msg, eDestination)) {
 622                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 623
 624                         /* route the message */
 625                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 626                         if (CtdlIsValidNode(&nexthop,
 627                                             NULL,
 628                                             Buf,
 629                                             working_ignetcfg,
 630                                             the_netmap) == 0)
 631                         {
 632                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 633
 634                                 /* serialize the message */
 635                                 CtdlSerializeMessage(&sermsg, msg);
 636
 637                                 /* now send it */
 638                                 if (StrLength(nexthop) == 0) {
 639                                         nexthop = Buf;
 640                                 }
 641                                 snprintf(filename,
 642                                          sizeof filename,
 643                                          "%s/%s@%lx%x",
 644                                          ctdl_netout_dir,
 645                                          ChrPtr(nexthop),
 646                                          time(NULL),
 647                                          rand()
 648                                 );
 649                                 syslog(LOG_DEBUG, "Appending to %s", filename);
 650                                 fp = fopen(filename, "ab");
 651                                 if (fp != NULL) {
 652                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 653                                         fclose(fp);
 654                                 }
 655                                 else {
 656                                         syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 657                                 }
 658                                 free(sermsg.ser);
 659                                 CM_Free(msg);
 660                                 FreeStrBuf(&Buf);
 661                                 return;
 662                         }
 663
 664                         else {  /* invalid destination node name */
 665                                 FreeStrBuf(&Buf);
 666
 667                                 network_bounce(&msg,
 668 "A message you sent could not be delivered due to an invalid destination node"
 669 " name.  Please check the address and try sending the message again.\n");
 670                                 return;
 671
 672                         }
 673                 }
 674         }
 675
 676         /*
 677          * Check to see if we already have a copy of this message, and
 678          * abort its processing if so.  (We used to post a warning to Aide>
 679          * every time this happened, but the network is now so densely
 680          * connected that it's inevitable.)
 681          */
 682         if (network_usetable(msg) != 0) {
 683                 CM_Free(msg);
 684                 return;
 685         }
 686
 687         /* Learn network topology from the path */
 688         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 689                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 690                                      msg->cm_fields[eMessagePath],
 691                                      the_netmap,
 692                                      netmap_changed);
 693         }
 694
 695         /* Is the sending node giving us a very persuasive suggestion about
 696          * which room this message should be saved in?  If so, go with that.
 697          */
 698         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 699                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 700         }
 701
 702         /* Otherwise, does it have a recipient?  If so, validate it... */
 703         else if (!CM_IsEmpty(msg, eRecipient)) {
 704                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 705                 if (recp != NULL) if (recp->num_error != 0) {
 706                         network_bounce(&msg,
 707                                 "A message you sent could not be delivered due to an invalid address.\n"
 708                                 "Please check the address and try sending the message again.\n");
 709                         free_recipients(recp);
 710                         syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.");
 711                         return;
 712                 }
 713                 strcpy(target_room, "");        /* no target room if mail */
 714         }
 715
 716         /* Our last shot at finding a home for this message is to see if
 717          * it has the eOriginalRoom (O) field (Originating room) set.
 718          */
 719         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 720                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 721         }
 722
 723         /* Strip out fields that are only relevant during transit */
 724         CM_FlushField(msg, eDestination);
 725         CM_FlushField(msg, eRemoteRoom);
 726
 727         /* save the message into a room */
 728         if (PerformNetprocHooks(msg, target_room) == 0) {
 729                 msg->cm_flags = CM_SKIP_HOOKS;
 730                 CtdlSubmitMsg(msg, recp, target_room, 0);
 731         }
 732         CM_Free(msg);
 733         free_recipients(recp);
 734 }
 735
 736
 737 /*
 738  * Process a single message from a single file from the inbound queue
 739  */
 740 void network_process_message(FILE *fp,
 741                              long msgstart,
 742                              long msgend,
 743                              HashList *working_ignetcfg,
 744                              HashList *the_netmap,
 745                              int *netmap_changed)
 746 {
 747         long hold_pos;
 748         long size;
 749         char *buffer;
 750
 751         hold_pos = ftell(fp);
 752         size = msgend - msgstart + 1;
 753         buffer = malloc(size);
 754         if (buffer != NULL) {
 755                 fseek(fp, msgstart, SEEK_SET);
 756                 if (fread(buffer, size, 1, fp) > 0) {
 757                         network_process_buffer(buffer,
 758                                                size,
 759                                                working_ignetcfg,
 760                                                the_netmap,
 761                                                netmap_changed);
 762                 }
 763                 free(buffer);
 764         }
 765
 766         fseek(fp, hold_pos, SEEK_SET);
 767 }
 768
 769
 770 /*
 771  * Process a single file from the inbound queue
 772  */
 773 void network_process_file(char *filename,
 774                           HashList *working_ignetcfg,
 775                           HashList *the_netmap,
 776                           int *netmap_changed)
 777 {
 778         FILE *fp;
 779         long msgstart = (-1L);
 780         long msgend = (-1L);
 781         long msgcur = 0L;
 782         int ch;
 783         int nMessages = 0;
 784
 785         fp = fopen(filename, "rb");
 786         if (fp == NULL) {
 787                 syslog(LOG_CRIT, "Error opening %s: %s", filename, strerror(errno));
 788                 return;
 789         }
 790
 791         fseek(fp, 0L, SEEK_END);
 792         syslog(LOG_INFO, "network: processing %ld bytes from %s", ftell(fp), filename);
 793         rewind(fp);
 794
 795         /* Look for messages in the data stream and break them out */
 796         while (ch = getc(fp), ch >= 0) {
 797
 798                 if (ch == 255) {
 799                         if (msgstart >= 0L) {
 800                                 msgend = msgcur - 1;
 801                                 network_process_message(fp,
 802                                                         msgstart,
 803                                                         msgend,
 804                                                         working_ignetcfg,
 805                                                         the_netmap,
 806                                                         netmap_changed);
 807                         }
 808                         msgstart = msgcur;
 809                 }
 810
 811                 ++msgcur;
 812                 nMessages ++;
 813         }
 814
 815         msgend = msgcur - 1;
 816         if (msgstart >= 0L) {
 817                 network_process_message(fp,
 818                                         msgstart,
 819                                         msgend,
 820                                         working_ignetcfg,
 821                                         the_netmap,
 822                                         netmap_changed);
 823                 nMessages ++;
 824         }
 825
 826         if (nMessages > 0)
 827                 syslog(LOG_INFO, "network: processed %d messages in %s", nMessages, filename);
 828
 829         fclose(fp);
 830         unlink(filename);
 831 }
 832
 833
 834 /*
 835  * Process anything in the inbound queue
 836  */
 837 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 838 {
 839         DIR *dp;
 840         struct dirent *d;
 841         struct dirent *filedir_entry;
 842         struct stat statbuf;
 843         char filename[PATH_MAX];
 844         static time_t last_spoolin_mtime = 0L;
 845         int d_type = 0;
 846         int d_namelen;
 847
 848         /*
 849          * Check the spoolin directory's modification time.  If it hasn't
 850          * been touched, we don't need to scan it.
 851          */
 852         if (stat(ctdl_netin_dir, &statbuf)) return;
 853         if (statbuf.st_mtime == last_spoolin_mtime) {
 854                 syslog(LOG_DEBUG, "network: nothing in inbound queue");
 855                 return;
 856         }
 857         last_spoolin_mtime = statbuf.st_mtime;
 858         syslog(LOG_DEBUG, "network: processing inbound queue");
 859
 860         /*
 861          * Ok, there's something interesting in there, so scan it.
 862          */
 863         dp = opendir(ctdl_netin_dir);
 864         if (dp == NULL) return;
 865
 866         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 867         if (d == NULL) {
 868                 closedir(dp);
 869                 return;
 870         }
 871
 872         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 873                (filedir_entry != NULL))
 874         {
 875 #ifdef _DIRENT_HAVE_D_NAMLEN
 876                 d_namelen = filedir_entry->d_namlen;
 877
 878 #else
 879                 d_namelen = strlen(filedir_entry->d_name);
 880 #endif
 881
 882 #ifdef _DIRENT_HAVE_D_TYPE
 883                 d_type = filedir_entry->d_type;
 884 #else
 885                 d_type = DT_UNKNOWN;
 886 #endif
 887                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 888                         continue; /* Ignore backup files... */
 889
 890                 if ((d_namelen == 1) &&
 891                     (filedir_entry->d_name[0] == '.'))
 892                         continue;
 893
 894                 if ((d_namelen == 2) &&
 895                     (filedir_entry->d_name[0] == '.') &&
 896                     (filedir_entry->d_name[1] == '.'))
 897                         continue;
 898
 899                 if (d_type == DT_UNKNOWN) {
 900                         struct stat s;
 901                         char path[PATH_MAX];
 902
 903                         snprintf(path,
 904                                  PATH_MAX,
 905                                  "%s/%s",
 906                                  ctdl_netin_dir,
 907                                  filedir_entry->d_name);
 908
 909                         if (lstat(path, &s) == 0) {
 910                                 d_type = IFTODT(s.st_mode);
 911                         }
 912                 }
 913
 914                 switch (d_type)
 915                 {
 916                 case DT_DIR:
 917                         break;
 918                 case DT_LNK: /* TODO: check whether its a file or a directory */
 919                 case DT_REG:
 920                         snprintf(filename,
 921                                 sizeof filename,
 922                                 "%s/%s",
 923                                 ctdl_netin_dir,
 924                                 d->d_name
 925                         );
 926                         network_process_file(filename,
 927                                              working_ignetcfg,
 928                                              the_netmap,
 929                                              netmap_changed);
 930                 }
 931         }
 932
 933         closedir(dp);
 934         free(d);
 935 }
 936
 937 /*
 938  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 939  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 940  */
 941 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 942 {
 943         IOBuffer IOB;
 944         FDIOBuffer FDIO;
 945         int d_namelen;
 946         DIR *dp;
 947         struct dirent *d;
 948         struct dirent *filedir_entry;
 949         const char *pch;
 950         char spooloutfilename[PATH_MAX];
 951         char filename[PATH_MAX];
 952         const StrBuf *nexthop;
 953         StrBuf *NextHop;
 954         int i;
 955         struct stat statbuf;
 956         int nFailed = 0;
 957         int d_type = 0;
 958
 959
 960         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 961         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 962         if (d == NULL)  return;
 963
 964         dp = opendir(ctdl_netout_dir);
 965         if (dp == NULL) {
 966                 free(d);
 967                 return;
 968         }
 969
 970         NextHop = NewStrBuf();
 971         memset(&IOB, 0, sizeof(IOBuffer));
 972         memset(&FDIO, 0, sizeof(FDIOBuffer));
 973         FDIO.IOB = &IOB;
 974
 975         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 976                (filedir_entry != NULL))
 977         {
 978 #ifdef _DIRENT_HAVE_D_NAMLEN
 979                 d_namelen = filedir_entry->d_namlen;
 980
 981 #else
 982                 d_namelen = strlen(filedir_entry->d_name);
 983 #endif
 984
 985 #ifdef _DIRENT_HAVE_D_TYPE
 986                 d_type = filedir_entry->d_type;
 987 #else
 988                 d_type = DT_UNKNOWN;
 989 #endif
 990                 if (d_type == DT_DIR)
 991                         continue;
 992
 993                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 994                         continue; /* Ignore backup files... */
 995
 996                 if ((d_namelen == 1) &&
 997                     (filedir_entry->d_name[0] == '.'))
 998                         continue;
 999
1000                 if ((d_namelen == 2) &&
1001                     (filedir_entry->d_name[0] == '.') &&
1002                     (filedir_entry->d_name[1] == '.'))
1003                         continue;
1004
1005                 pch = strchr(filedir_entry->d_name, '@');
1006                 if (pch == NULL)
1007                         continue;
1008
1009                 snprintf(filename,
1010                          sizeof filename,
1011                          "%s/%s",
1012                          ctdl_netout_dir,
1013                          filedir_entry->d_name);
1014
1015                 StrBufPlain(NextHop,
1016                             filedir_entry->d_name,
1017                             pch - filedir_entry->d_name);
1018
1019                 snprintf(spooloutfilename,
1020                          sizeof spooloutfilename,
1021                          "%s/%s",
1022                          ctdl_netout_dir,
1023                          ChrPtr(NextHop));
1024
1025                 syslog(LOG_DEBUG, "Consolidate %s to %s", filename, ChrPtr(NextHop));
1026                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
1027                         nFailed++;
1028                         syslog(LOG_DEBUG, "Currently online with %s - skipping for now", ChrPtr(NextHop));
1029                 }
1030                 else {
1031                         size_t dsize;
1032                         size_t fsize;
1033                         int infd, outfd;
1034                         const char *err = NULL;
1035                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
1036
1037                         infd = open(filename, O_RDONLY);
1038                         if (infd == -1) {
1039                                 nFailed++;
1040                                 syslog(LOG_ERR,
1041                                           "failed to open %s for reading due to %s; skipping.",
1042                                           filename, strerror(errno)
1043                                 );
1044                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1045                                 continue;
1046                         }
1047
1048                         outfd = open(spooloutfilename,
1049                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1050                                   S_IRUSR|S_IWUSR);
1051                         if (outfd == -1)
1052                         {
1053                                 outfd = open(spooloutfilename,
1054                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1055                                              S_IRUSR | S_IWUSR);
1056                         }
1057                         if (outfd == -1) {
1058                                 nFailed++;
1059                                 syslog(LOG_ERR,
1060                                           "failed to open %s for reading due to %s; skipping.",
1061                                           spooloutfilename, strerror(errno)
1062                                 );
1063                                 close(infd);
1064                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1065                                 continue;
1066                         }
1067
1068                         dsize = lseek(outfd, 0, SEEK_END);
1069                         lseek(outfd, -dsize, SEEK_SET);
1070
1071                         fstat(infd, &statbuf);
1072                         fsize = statbuf.st_size;
1073 /*
1074                         fsize = lseek(infd, 0, SEEK_END);
1075 */
1076                         IOB.fd = infd;
1077                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1078                         FDIO.ChunkSendRemain = fsize;
1079                         FDIO.TotalSentAlready = dsize;
1080                         err = NULL;
1081                         errno = 0;
1082                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1083                         if (err == NULL) {
1084                                 unlink(filename);
1085                                 syslog(LOG_DEBUG, "Spoolfile %s now "SIZE_T_FMT" KB", spooloutfilename, (dsize + fsize)/1024);
1086                         }
1087                         else {
1088                                 nFailed++;
1089                                 syslog(LOG_ERR, "failed to append to %s [%s]; rolling back..", spooloutfilename, strerror(errno));
1090                                 /* whoops partial append?? truncate spooloutfilename again! */
1091                                 ftruncate(outfd, dsize);
1092                         }
1093                         FDIOBufferDelete(&FDIO);
1094                         close(infd);
1095                         close(outfd);
1096                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1097                 }
1098         }
1099         closedir(dp);
1100
1101         if (nFailed > 0) {
1102                 FreeStrBuf(&NextHop);
1103                 syslog(LOG_INFO, "skipping Spoolcleanup because of %d files unprocessed.", nFailed);
1104
1105                 return;
1106         }
1107
1108         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1109         dp = opendir(ctdl_netout_dir);
1110         if (dp == NULL) {
1111                 FreeStrBuf(&NextHop);
1112                 free(d);
1113                 return;
1114         }
1115
1116         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1117                (filedir_entry != NULL))
1118         {
1119 #ifdef _DIRENT_HAVE_D_NAMLEN
1120                 d_namelen = filedir_entry->d_namlen;
1121
1122 #else
1123                 d_namelen = strlen(filedir_entry->d_name);
1124 #endif
1125
1126 #ifdef _DIRENT_HAVE_D_TYPE
1127                 d_type = filedir_entry->d_type;
1128 #else
1129                 d_type = DT_UNKNOWN;
1130 #endif
1131                 if (d_type == DT_DIR)
1132                         continue;
1133
1134                 if ((d_namelen == 1) &&
1135                     (filedir_entry->d_name[0] == '.'))
1136                         continue;
1137
1138                 if ((d_namelen == 2) &&
1139                     (filedir_entry->d_name[0] == '.') &&
1140                     (filedir_entry->d_name[1] == '.'))
1141                         continue;
1142
1143                 pch = strchr(filedir_entry->d_name, '@');
1144                 if (pch == NULL) /* no @ in name? consolidated file. */
1145                         continue;
1146
1147                 StrBufPlain(NextHop,
1148                             filedir_entry->d_name,
1149                             pch - filedir_entry->d_name);
1150
1151                 snprintf(filename,
1152                         sizeof filename,
1153                         "%s/%s",
1154                         ctdl_netout_dir,
1155                         filedir_entry->d_name
1156                 );
1157
1158                 i = CtdlIsValidNode(&nexthop,
1159                                     NULL,
1160                                     NextHop,
1161                                     working_ignetcfg,
1162                                     the_netmap);
1163
1164                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1165                         unlink(filename);
1166                 }
1167         }
1168         FreeStrBuf(&NextHop);
1169         free(d);
1170         closedir(dp);
1171 }
1172
1173 void free_spoolcontrol_struct(SpoolControl **sc)
1174 {
1175         free_spoolcontrol_struct_members(*sc);
1176         free(*sc);
1177         *sc = NULL;
1178 }
1179
1180 void free_spoolcontrol_struct_members(SpoolControl *sc)
1181 {
1182         int i;
1183         FreeStrBuf(&sc->RoomInfo);
1184         FreeStrBuf(&sc->ListID);
1185         for (i = 0; i < maxRoomNetCfg; i++)
1186                 FreeStrBuf(&sc->Users[i]);
1187 }
1188
1189
1190
1191 /*
1192  * It's ok if these directories already exist.  Just fail silently.
1193  */
1194 void create_spool_dirs(void) {
1195         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1196                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1197         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1198                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1199         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1200                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1201         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1202                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1203         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1204                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1205         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1206                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1207         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1208                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1209         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1210                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1211 }
1212
1213 /*
1214  * Module entry point
1215  */
1216 CTDL_MODULE_INIT(network_spool)
1217 {
1218         if (!threading)
1219         {
1220                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1221                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1222                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1223                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1224                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1225                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1226                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1227                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1228
1229                 create_spool_dirs();
1230 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1231         }
1232         return "network_spool";
1233 }