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) 2000-2017 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->working_ignetcfg = working_ignetcfg;
 275         sc->the_netmap = the_netmap;
 276
 277         /*
 278          * If the room doesn't exist, don't try to perform its networking tasks.
 279          * Normally this should never happen, but once in a while maybe a room gets
 280          * queued for networking and then deleted before it can happen.
 281          */
 282         if (CtdlGetRoom(&sc->room, room_to_spool->name) != 0) {
 283                 syslog(LOG_INFO, "ERROR: cannot load <%s>", room_to_spool->name);
 284                 free(sc);
 285                 return;
 286         }
 287
 288         assert(sc->RNCfg == NULL);      // checking to make sure we cleared it from last time
 289
 290         sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 291
 292         syslog(LOG_DEBUG, "Room <%s> highest=%ld lastsent=%ld", room_to_spool->name, sc->room.QRhighest, sc->RNCfg->lastsent);
 293         if ( (!HaveSpoolConfig(sc->RNCfg)) || (sc->room.QRhighest <= sc->RNCfg->lastsent) )
 294         {
 295                 // There is nothing to send from this room.
 296                 MARK_syslog(LOG_DEBUG, "Nothing to do for <%s>", room_to_spool->name);
 297                 FreeRoomNetworkStruct(&sc->RNCfg);
 298                 sc->RNCfg = NULL;
 299                 free(sc);
 300                 return;
 301         }
 302
 303         sc->lastsent = sc->RNCfg->lastsent;
 304         room_to_spool->lastsent = sc->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         struct CitContext *CCC = CC;
 329 #define MAX_LISTIDLENGTH 150
 330
 331         // Load the room banner as the list description
 332         struct CtdlMessage *msg = CtdlFetchMessage(sc->room.msgnum_info, 1, 1);
 333         if (msg != NULL) {
 334                 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
 335                 CtdlOutputPreLoadedMsg(msg, MT_CITADEL, HEADERS_NONE, 0, 0, 0);
 336                 CM_Free(msg);
 337                 sc->RoomInfo = CC->redirect_buffer;
 338                 CC->redirect_buffer = NULL;
 339         }
 340         else {
 341                 sc->RoomInfo = NewStrBufPlain(NULL, SIZ);
 342         }
 343
 344         // Calculate the List ID
 345         sc->ListID = NewStrBufPlain(NULL, 1024);
 346         if (StrLength(sc->RoomInfo) > 0)
 347         {
 348                 const char *Pos = NULL;
 349                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 350
 351                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 352                 {
 353                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 354                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 355                 }
 356                 StrBufAsciify(sc->ListID, ' ');
 357         }
 358         else
 359         {
 360                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 361         }
 362
 363         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 364         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 365         StrBufAsciify(RoomName, '_');
 366         StrBufReplaceChars(RoomName, ' ', '_');
 367
 368         if (StrLength(sc->Users[roommailalias]) > 0)
 369         {
 370                 long Pos;
 371                 const char *AtPos;
 372
 373                 Pos = StrLength(sc->ListID);
 374                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 375                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 376
 377                 if (AtPos != NULL)
 378                 {
 379                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 380                 }
 381         }
 382         else
 383         {
 384                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 385                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 386                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 387                 StrBufAppendBufPlain(sc->ListID, CtdlGetConfigStr("c_fqdn"), -1, 0);
 388                 /*
 389                  * this used to be:
 390                  * roomname <Room-Number.list-id.fqdn>
 391                  * according to rfc2919.txt it only has to be a uniq identifier
 392                  * under the domain of the system;
 393                  * in general MUAs use it to calculate the reply address nowadays.
 394                  */
 395         }
 396         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 397
 398         if (StrLength(sc->Users[roommailalias]) == 0)
 399         {
 400                 sc->Users[roommailalias] = NewStrBuf();
 401
 402                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 403                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 404                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 405                 StrBufAppendBufPlain(sc->Users[roommailalias], CtdlGetConfigStr("c_fqdn"), -1, 0);
 406
 407                 StrBufLowerCase(sc->Users[roommailalias]);
 408         }
 409
 410         FreeStrBuf(&RoomName);
 411 }
 412
 413
 414 /*
 415  * Batch up and send all outbound traffic from the current room
 416  */
 417 void network_spoolout_room(SpoolControl *sc)
 418 {
 419         struct CitContext *CCC = CC;
 420         char buf[SIZ];
 421         int i;
 422         long lastsent;
 423
 424         /*
 425          * If the room doesn't exist, don't try to perform its networking tasks.
 426          * Normally this should never happen, but once in a while maybe a room gets
 427          * queued for networking and then deleted before it can happen.
 428          */
 429         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 430
 431         syslog(LOG_INFO, "network_spoolout_room(room=%s, lastsent=%ld)", CCC->room.QRname, sc->lastsent);
 432
 433         CalcListID(sc);
 434
 435         /* remember where we started... */
 436         lastsent = sc->lastsent;
 437
 438         /* Fetch the messages we ought to send & prepare them. */
 439         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL, network_spool_msg, sc);
 440
 441         if (StrLength(sc->Users[roommailalias]) > 0)
 442         {
 443                 long len;
 444                 len = StrLength(sc->Users[roommailalias]);
 445                 if (len + 1 > sizeof(buf))
 446                         len = sizeof(buf) - 1;
 447                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 448                 buf[len] = '\0';
 449         }
 450         else
 451         {
 452                 snprintf(buf, sizeof buf, "room_%s@%s", CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
 453         }
 454
 455         for (i=0; buf[i]; ++i) {
 456                 buf[i] = tolower(buf[i]);
 457                 if (isspace(buf[i])) buf[i] = '_';
 458         }
 459
 460
 461         /* If we wrote a digest, deliver it and then close it */
 462         if ( (sc->Users[digestrecp] != NULL) && (sc->digestfp != NULL) )
 463         {
 464                 fprintf(sc->digestfp,
 465                         " ------------------------------------------------------------------------------\n"
 466                         "You are subscribed to the '%s' list.\n"
 467                         "To post to the list: %s\n",
 468                         CCC->room.QRname, buf
 469                 );
 470                 network_deliver_digest(sc);     /* deliver */
 471                 fclose(sc->digestfp);
 472                 sc->digestfp = NULL;
 473                 remove_digest_file(&sc->room);
 474         }
 475
 476         /* Now rewrite the netconfig */
 477         syslog(LOG_DEBUG, "lastsent was %ld , now it is %ld", lastsent, sc->lastsent);
 478         if (sc->lastsent != lastsent)
 479         {
 480                 OneRoomNetCfg *r;
 481
 482                 begin_critical_section(S_NETCONFIGS);
 483                 r = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 484                 r->lastsent = sc->lastsent;
 485                 SaveRoomNetConfigFile(r, sc->room.QRnumber);
 486                 FreeRoomNetworkStruct(&r);
 487                 end_critical_section(S_NETCONFIGS);
 488         }
 489 }
 490
 491
 492 /*
 493  * Check the use table.  This is a list of messages which have recently
 494  * arrived on the system.  It is maintained and queried to prevent the same
 495  * message from being entered into the database multiple times if it happens
 496  * to arrive multiple times by accident.
 497  */
 498 int network_usetable(struct CtdlMessage *msg)
 499 {
 500         StrBuf *msgid;
 501         struct CitContext *CCC = CC;
 502         time_t now;
 503
 504         /* Bail out if we can't generate a message ID */
 505         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 506         {
 507                 return(0);
 508         }
 509
 510         /* Generate the message ID */
 511         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 512         if (haschar(ChrPtr(msgid), '@') == 0) {
 513                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 514                 if (!CM_IsEmpty(msg, eNodeName)) {
 515                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 516                 }
 517                 else {
 518                         FreeStrBuf(&msgid);
 519                         return(0);
 520                 }
 521         }
 522         now = time(NULL);
 523         if (CheckIfAlreadySeen(msgid, now, 0, eUpdate)) {
 524                 FreeStrBuf(&msgid);
 525                 return(1);
 526         }
 527         FreeStrBuf(&msgid);
 528
 529         return(0);
 530 }
 531
 532
 533 /*
 534  * Process a buffer containing a single message from a single file
 535  * from the inbound queue
 536  */
 537 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 538 {
 539         long len;
 540         StrBuf *Buf = NULL;
 541         struct CtdlMessage *msg = NULL;
 542         long pos;
 543         int field;
 544         recptypes *recp = NULL;
 545         char target_room[ROOMNAMELEN];
 546         struct ser_ret sermsg;
 547         char filename[PATH_MAX];
 548         FILE *fp;
 549         const StrBuf *nexthop = NULL;
 550         unsigned char firstbyte;
 551         unsigned char lastbyte;
 552
 553         syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes", size);
 554
 555         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 556         firstbyte = buffer[0];
 557         lastbyte = buffer[size-1];
 558         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 559                 syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d", size, firstbyte, lastbyte);
 560                 return;
 561         }
 562
 563         /* Set default target room to trash */
 564         strcpy(target_room, TWITROOM);
 565
 566         /* Load the message into memory */
 567         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 568         memset(msg, 0, sizeof(struct CtdlMessage));
 569         msg->cm_magic = CTDLMESSAGE_MAGIC;
 570         msg->cm_anon_type = buffer[1];
 571         msg->cm_format_type = buffer[2];
 572
 573         for (pos = 3; pos < size; ++pos) {
 574                 field = buffer[pos];
 575                 len = strlen(buffer + pos + 1);
 576                 CM_SetField(msg, field, buffer + pos + 1, len);
 577                 pos = pos + len + 1;
 578         }
 579
 580         /* Check for message routing */
 581         if (!CM_IsEmpty(msg, eDestination)) {
 582                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 583
 584                         /* route the message */
 585                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 586                         if (CtdlIsValidNode(&nexthop,
 587                                             NULL,
 588                                             Buf,
 589                                             working_ignetcfg,
 590                                             the_netmap) == 0)
 591                         {
 592                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 593
 594                                 /* serialize the message */
 595                                 CtdlSerializeMessage(&sermsg, msg);
 596
 597                                 /* now send it */
 598                                 if (StrLength(nexthop) == 0) {
 599                                         nexthop = Buf;
 600                                 }
 601                                 snprintf(filename,
 602                                          sizeof filename,
 603                                          "%s/%s@%lx%x",
 604                                          ctdl_netout_dir,
 605                                          ChrPtr(nexthop),
 606                                          time(NULL),
 607                                          rand()
 608                                 );
 609                                 syslog(LOG_DEBUG, "Appending to %s", filename);
 610                                 fp = fopen(filename, "ab");
 611                                 if (fp != NULL) {
 612                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 613                                         fclose(fp);
 614                                 }
 615                                 else {
 616                                         syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 617                                 }
 618                                 free(sermsg.ser);
 619                                 CM_Free(msg);
 620                                 FreeStrBuf(&Buf);
 621                                 return;
 622                         }
 623
 624                         else {  /* invalid destination node name */
 625                                 FreeStrBuf(&Buf);
 626
 627                                 network_bounce(&msg,
 628 "A message you sent could not be delivered due to an invalid destination node"
 629 " name.  Please check the address and try sending the message again.\n");
 630                                 return;
 631
 632                         }
 633                 }
 634         }
 635
 636         /*
 637          * Check to see if we already have a copy of this message, and
 638          * abort its processing if so.  (We used to post a warning to Aide>
 639          * every time this happened, but the network is now so densely
 640          * connected that it's inevitable.)
 641          */
 642         if (network_usetable(msg) != 0) {
 643                 CM_Free(msg);
 644                 return;
 645         }
 646
 647         /* Learn network topology from the path */
 648         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 649                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 650                                      msg->cm_fields[eMessagePath],
 651                                      the_netmap,
 652                                      netmap_changed);
 653         }
 654
 655         /* Is the sending node giving us a very persuasive suggestion about
 656          * which room this message should be saved in?  If so, go with that.
 657          */
 658         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 659                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 660         }
 661
 662         /* Otherwise, does it have a recipient?  If so, validate it... */
 663         else if (!CM_IsEmpty(msg, eRecipient)) {
 664                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 665                 if (recp != NULL) if (recp->num_error != 0) {
 666                         network_bounce(&msg,
 667                                 "A message you sent could not be delivered due to an invalid address.\n"
 668                                 "Please check the address and try sending the message again.\n");
 669                         free_recipients(recp);
 670                         syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.");
 671                         return;
 672                 }
 673                 strcpy(target_room, "");        /* no target room if mail */
 674         }
 675
 676         /* Our last shot at finding a home for this message is to see if
 677          * it has the eOriginalRoom (O) field (Originating room) set.
 678          */
 679         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 680                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 681         }
 682
 683         /* Strip out fields that are only relevant during transit */
 684         CM_FlushField(msg, eDestination);
 685         CM_FlushField(msg, eRemoteRoom);
 686
 687         /* save the message into a room */
 688         if (PerformNetprocHooks(msg, target_room) == 0) {
 689                 msg->cm_flags = CM_SKIP_HOOKS;
 690                 CtdlSubmitMsg(msg, recp, target_room, 0);
 691         }
 692         CM_Free(msg);
 693         free_recipients(recp);
 694 }
 695
 696
 697 /*
 698  * Process a single message from a single file from the inbound queue
 699  */
 700 void network_process_message(FILE *fp,
 701                              long msgstart,
 702                              long msgend,
 703                              HashList *working_ignetcfg,
 704                              HashList *the_netmap,
 705                              int *netmap_changed)
 706 {
 707         long hold_pos;
 708         long size;
 709         char *buffer;
 710
 711         hold_pos = ftell(fp);
 712         size = msgend - msgstart + 1;
 713         buffer = malloc(size);
 714         if (buffer != NULL) {
 715                 fseek(fp, msgstart, SEEK_SET);
 716                 if (fread(buffer, size, 1, fp) > 0) {
 717                         network_process_buffer(buffer,
 718                                                size,
 719                                                working_ignetcfg,
 720                                                the_netmap,
 721                                                netmap_changed);
 722                 }
 723                 free(buffer);
 724         }
 725
 726         fseek(fp, hold_pos, SEEK_SET);
 727 }
 728
 729
 730 /*
 731  * Process a single file from the inbound queue
 732  */
 733 void network_process_file(char *filename,
 734                           HashList *working_ignetcfg,
 735                           HashList *the_netmap,
 736                           int *netmap_changed)
 737 {
 738         FILE *fp;
 739         long msgstart = (-1L);
 740         long msgend = (-1L);
 741         long msgcur = 0L;
 742         int ch;
 743         int nMessages = 0;
 744
 745         fp = fopen(filename, "rb");
 746         if (fp == NULL) {
 747                 syslog(LOG_CRIT, "Error opening %s: %s", filename, strerror(errno));
 748                 return;
 749         }
 750
 751         fseek(fp, 0L, SEEK_END);
 752         syslog(LOG_INFO, "network: processing %ld bytes from %s", ftell(fp), filename);
 753         rewind(fp);
 754
 755         /* Look for messages in the data stream and break them out */
 756         while (ch = getc(fp), ch >= 0) {
 757
 758                 if (ch == 255) {
 759                         if (msgstart >= 0L) {
 760                                 msgend = msgcur - 1;
 761                                 network_process_message(fp,
 762                                                         msgstart,
 763                                                         msgend,
 764                                                         working_ignetcfg,
 765                                                         the_netmap,
 766                                                         netmap_changed);
 767                         }
 768                         msgstart = msgcur;
 769                 }
 770
 771                 ++msgcur;
 772                 nMessages ++;
 773         }
 774
 775         msgend = msgcur - 1;
 776         if (msgstart >= 0L) {
 777                 network_process_message(fp,
 778                                         msgstart,
 779                                         msgend,
 780                                         working_ignetcfg,
 781                                         the_netmap,
 782                                         netmap_changed);
 783                 nMessages ++;
 784         }
 785
 786         if (nMessages > 0)
 787                 syslog(LOG_INFO, "network: processed %d messages in %s", nMessages, filename);
 788
 789         fclose(fp);
 790         unlink(filename);
 791 }
 792
 793
 794 /*
 795  * Process anything in the inbound queue
 796  */
 797 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 798 {
 799         DIR *dp;
 800         struct dirent *d;
 801         struct dirent *filedir_entry;
 802         struct stat statbuf;
 803         char filename[PATH_MAX];
 804         static time_t last_spoolin_mtime = 0L;
 805         int d_type = 0;
 806         int d_namelen;
 807
 808         /*
 809          * Check the spoolin directory's modification time.  If it hasn't
 810          * been touched, we don't need to scan it.
 811          */
 812         if (stat(ctdl_netin_dir, &statbuf)) return;
 813         if (statbuf.st_mtime == last_spoolin_mtime) {
 814                 MARKM_syslog(LOG_DEBUG, "network: nothing in inbound queue");
 815                 return;
 816         }
 817         last_spoolin_mtime = statbuf.st_mtime;
 818         MARKM_syslog(LOG_DEBUG, "network: processing inbound queue");
 819
 820         /*
 821          * Ok, there's something interesting in there, so scan it.
 822          */
 823         dp = opendir(ctdl_netin_dir);
 824         if (dp == NULL) return;
 825
 826         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 827         if (d == NULL) {
 828                 closedir(dp);
 829                 return;
 830         }
 831
 832         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 833                (filedir_entry != NULL))
 834         {
 835 #ifdef _DIRENT_HAVE_D_NAMLEN
 836                 d_namelen = filedir_entry->d_namlen;
 837
 838 #else
 839                 d_namelen = strlen(filedir_entry->d_name);
 840 #endif
 841
 842 #ifdef _DIRENT_HAVE_D_TYPE
 843                 d_type = filedir_entry->d_type;
 844 #else
 845                 d_type = DT_UNKNOWN;
 846 #endif
 847                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 848                         continue; /* Ignore backup files... */
 849
 850                 if ((d_namelen == 1) &&
 851                     (filedir_entry->d_name[0] == '.'))
 852                         continue;
 853
 854                 if ((d_namelen == 2) &&
 855                     (filedir_entry->d_name[0] == '.') &&
 856                     (filedir_entry->d_name[1] == '.'))
 857                         continue;
 858
 859                 if (d_type == DT_UNKNOWN) {
 860                         struct stat s;
 861                         char path[PATH_MAX];
 862
 863                         snprintf(path,
 864                                  PATH_MAX,
 865                                  "%s/%s",
 866                                  ctdl_netin_dir,
 867                                  filedir_entry->d_name);
 868
 869                         if (lstat(path, &s) == 0) {
 870                                 d_type = IFTODT(s.st_mode);
 871                         }
 872                 }
 873
 874                 switch (d_type)
 875                 {
 876                 case DT_DIR:
 877                         break;
 878                 case DT_LNK: /* TODO: check whether its a file or a directory */
 879                 case DT_REG:
 880                         snprintf(filename,
 881                                 sizeof filename,
 882                                 "%s/%s",
 883                                 ctdl_netin_dir,
 884                                 d->d_name
 885                         );
 886                         network_process_file(filename,
 887                                              working_ignetcfg,
 888                                              the_netmap,
 889                                              netmap_changed);
 890                 }
 891         }
 892
 893         closedir(dp);
 894         free(d);
 895 }
 896
 897 /*
 898  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 899  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 900  */
 901 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 902 {
 903         IOBuffer IOB;
 904         FDIOBuffer FDIO;
 905         int d_namelen;
 906         DIR *dp;
 907         struct dirent *d;
 908         struct dirent *filedir_entry;
 909         const char *pch;
 910         char spooloutfilename[PATH_MAX];
 911         char filename[PATH_MAX];
 912         const StrBuf *nexthop;
 913         StrBuf *NextHop;
 914         int i;
 915         struct stat statbuf;
 916         int nFailed = 0;
 917         int d_type = 0;
 918
 919
 920         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 921         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 922         if (d == NULL)  return;
 923
 924         dp = opendir(ctdl_netout_dir);
 925         if (dp == NULL) {
 926                 free(d);
 927                 return;
 928         }
 929
 930         NextHop = NewStrBuf();
 931         memset(&IOB, 0, sizeof(IOBuffer));
 932         memset(&FDIO, 0, sizeof(FDIOBuffer));
 933         FDIO.IOB = &IOB;
 934
 935         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 936                (filedir_entry != NULL))
 937         {
 938 #ifdef _DIRENT_HAVE_D_NAMLEN
 939                 d_namelen = filedir_entry->d_namlen;
 940
 941 #else
 942                 d_namelen = strlen(filedir_entry->d_name);
 943 #endif
 944
 945 #ifdef _DIRENT_HAVE_D_TYPE
 946                 d_type = filedir_entry->d_type;
 947 #else
 948                 d_type = DT_UNKNOWN;
 949 #endif
 950                 if (d_type == DT_DIR)
 951                         continue;
 952
 953                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 954                         continue; /* Ignore backup files... */
 955
 956                 if ((d_namelen == 1) &&
 957                     (filedir_entry->d_name[0] == '.'))
 958                         continue;
 959
 960                 if ((d_namelen == 2) &&
 961                     (filedir_entry->d_name[0] == '.') &&
 962                     (filedir_entry->d_name[1] == '.'))
 963                         continue;
 964
 965                 pch = strchr(filedir_entry->d_name, '@');
 966                 if (pch == NULL)
 967                         continue;
 968
 969                 snprintf(filename,
 970                          sizeof filename,
 971                          "%s/%s",
 972                          ctdl_netout_dir,
 973                          filedir_entry->d_name);
 974
 975                 StrBufPlain(NextHop,
 976                             filedir_entry->d_name,
 977                             pch - filedir_entry->d_name);
 978
 979                 snprintf(spooloutfilename,
 980                          sizeof spooloutfilename,
 981                          "%s/%s",
 982                          ctdl_netout_dir,
 983                          ChrPtr(NextHop));
 984
 985                 syslog(LOG_DEBUG, "Consolidate %s to %s", filename, ChrPtr(NextHop));
 986                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
 987                         nFailed++;
 988                         syslog(LOG_DEBUG, "Currently online with %s - skipping for now", ChrPtr(NextHop));
 989                 }
 990                 else {
 991                         size_t dsize;
 992                         size_t fsize;
 993                         int infd, outfd;
 994                         const char *err = NULL;
 995                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
 996
 997                         infd = open(filename, O_RDONLY);
 998                         if (infd == -1) {
 999                                 nFailed++;
1000                                 syslog(LOG_ERR,
1001                                           "failed to open %s for reading due to %s; skipping.",
1002                                           filename, strerror(errno)
1003                                 );
1004                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1005                                 continue;
1006                         }
1007
1008                         outfd = open(spooloutfilename,
1009                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1010                                   S_IRUSR|S_IWUSR);
1011                         if (outfd == -1)
1012                         {
1013                                 outfd = open(spooloutfilename,
1014                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1015                                              S_IRUSR | S_IWUSR);
1016                         }
1017                         if (outfd == -1) {
1018                                 nFailed++;
1019                                 syslog(LOG_ERR,
1020                                           "failed to open %s for reading due to %s; skipping.",
1021                                           spooloutfilename, strerror(errno)
1022                                 );
1023                                 close(infd);
1024                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1025                                 continue;
1026                         }
1027
1028                         dsize = lseek(outfd, 0, SEEK_END);
1029                         lseek(outfd, -dsize, SEEK_SET);
1030
1031                         fstat(infd, &statbuf);
1032                         fsize = statbuf.st_size;
1033 /*
1034                         fsize = lseek(infd, 0, SEEK_END);
1035 */
1036                         IOB.fd = infd;
1037                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1038                         FDIO.ChunkSendRemain = fsize;
1039                         FDIO.TotalSentAlready = dsize;
1040                         err = NULL;
1041                         errno = 0;
1042                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1043                         if (err == NULL) {
1044                                 unlink(filename);
1045                                 syslog(LOG_DEBUG, "Spoolfile %s now "SIZE_T_FMT" KB", spooloutfilename, (dsize + fsize)/1024);
1046                         }
1047                         else {
1048                                 nFailed++;
1049                                 syslog(LOG_ERR, "failed to append to %s [%s]; rolling back..", spooloutfilename, strerror(errno));
1050                                 /* whoops partial append?? truncate spooloutfilename again! */
1051                                 ftruncate(outfd, dsize);
1052                         }
1053                         FDIOBufferDelete(&FDIO);
1054                         close(infd);
1055                         close(outfd);
1056                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1057                 }
1058         }
1059         closedir(dp);
1060
1061         if (nFailed > 0) {
1062                 FreeStrBuf(&NextHop);
1063                 syslog(LOG_INFO, "skipping Spoolcleanup because of %d files unprocessed.", nFailed);
1064
1065                 return;
1066         }
1067
1068         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1069         dp = opendir(ctdl_netout_dir);
1070         if (dp == NULL) {
1071                 FreeStrBuf(&NextHop);
1072                 free(d);
1073                 return;
1074         }
1075
1076         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1077                (filedir_entry != NULL))
1078         {
1079 #ifdef _DIRENT_HAVE_D_NAMLEN
1080                 d_namelen = filedir_entry->d_namlen;
1081
1082 #else
1083                 d_namelen = strlen(filedir_entry->d_name);
1084 #endif
1085
1086 #ifdef _DIRENT_HAVE_D_TYPE
1087                 d_type = filedir_entry->d_type;
1088 #else
1089                 d_type = DT_UNKNOWN;
1090 #endif
1091                 if (d_type == DT_DIR)
1092                         continue;
1093
1094                 if ((d_namelen == 1) &&
1095                     (filedir_entry->d_name[0] == '.'))
1096                         continue;
1097
1098                 if ((d_namelen == 2) &&
1099                     (filedir_entry->d_name[0] == '.') &&
1100                     (filedir_entry->d_name[1] == '.'))
1101                         continue;
1102
1103                 pch = strchr(filedir_entry->d_name, '@');
1104                 if (pch == NULL) /* no @ in name? consolidated file. */
1105                         continue;
1106
1107                 StrBufPlain(NextHop,
1108                             filedir_entry->d_name,
1109                             pch - filedir_entry->d_name);
1110
1111                 snprintf(filename,
1112                         sizeof filename,
1113                         "%s/%s",
1114                         ctdl_netout_dir,
1115                         filedir_entry->d_name
1116                 );
1117
1118                 i = CtdlIsValidNode(&nexthop,
1119                                     NULL,
1120                                     NextHop,
1121                                     working_ignetcfg,
1122                                     the_netmap);
1123
1124                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1125                         unlink(filename);
1126                 }
1127         }
1128         FreeStrBuf(&NextHop);
1129         free(d);
1130         closedir(dp);
1131 }
1132
1133 void free_spoolcontrol_struct(SpoolControl **sc)
1134 {
1135         free_spoolcontrol_struct_members(*sc);
1136         free(*sc);
1137         *sc = NULL;
1138 }
1139
1140 void free_spoolcontrol_struct_members(SpoolControl *sc)
1141 {
1142         int i;
1143         FreeStrBuf(&sc->RoomInfo);
1144         FreeStrBuf(&sc->ListID);
1145         for (i = 0; i < maxRoomNetCfg; i++)
1146                 FreeStrBuf(&sc->Users[i]);
1147 }
1148
1149
1150
1151 /*
1152  * It's ok if these directories already exist.  Just fail silently.
1153  */
1154 void create_spool_dirs(void) {
1155         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1156                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1157         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1158                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1159         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1160                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1161         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1162                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1163         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1164                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1165         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1166                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1167         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1168                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1169         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1170                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1171 }
1172
1173 /*
1174  * Module entry point
1175  */
1176 CTDL_MODULE_INIT(network_spool)
1177 {
1178         if (!threading)
1179         {
1180                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1181                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1182                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1183                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1184                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1185                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1186                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1187                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1188
1189                 create_spool_dirs();
1190 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1191         }
1192         return "network_spool";
1193 }