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->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("Networker Import",
 524                                msgid,
 525                                now, 0,
 526                                eUpdate,
 527                                CCC->cs_pid, 0) != 0)
 528         {
 529                 FreeStrBuf(&msgid);
 530                 return(1);
 531         }
 532         FreeStrBuf(&msgid);
 533
 534         return(0);
 535 }
 536
 537
 538 /*
 539  * Process a buffer containing a single message from a single file
 540  * from the inbound queue
 541  */
 542 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 543 {
 544         long len;
 545         StrBuf *Buf = NULL;
 546         struct CtdlMessage *msg = NULL;
 547         long pos;
 548         int field;
 549         recptypes *recp = NULL;
 550         char target_room[ROOMNAMELEN];
 551         struct ser_ret sermsg;
 552         char filename[PATH_MAX];
 553         FILE *fp;
 554         const StrBuf *nexthop = NULL;
 555         unsigned char firstbyte;
 556         unsigned char lastbyte;
 557
 558         syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes", size);
 559
 560         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 561         firstbyte = buffer[0];
 562         lastbyte = buffer[size-1];
 563         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 564                 syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d", size, firstbyte, lastbyte);
 565                 return;
 566         }
 567
 568         /* Set default target room to trash */
 569         strcpy(target_room, TWITROOM);
 570
 571         /* Load the message into memory */
 572         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 573         memset(msg, 0, sizeof(struct CtdlMessage));
 574         msg->cm_magic = CTDLMESSAGE_MAGIC;
 575         msg->cm_anon_type = buffer[1];
 576         msg->cm_format_type = buffer[2];
 577
 578         for (pos = 3; pos < size; ++pos) {
 579                 field = buffer[pos];
 580                 len = strlen(buffer + pos + 1);
 581                 CM_SetField(msg, field, buffer + pos + 1, len);
 582                 pos = pos + len + 1;
 583         }
 584
 585         /* Check for message routing */
 586         if (!CM_IsEmpty(msg, eDestination)) {
 587                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 588
 589                         /* route the message */
 590                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 591                         if (CtdlIsValidNode(&nexthop,
 592                                             NULL,
 593                                             Buf,
 594                                             working_ignetcfg,
 595                                             the_netmap) == 0)
 596                         {
 597                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 598
 599                                 /* serialize the message */
 600                                 CtdlSerializeMessage(&sermsg, msg);
 601
 602                                 /* now send it */
 603                                 if (StrLength(nexthop) == 0) {
 604                                         nexthop = Buf;
 605                                 }
 606                                 snprintf(filename,
 607                                          sizeof filename,
 608                                          "%s/%s@%lx%x",
 609                                          ctdl_netout_dir,
 610                                          ChrPtr(nexthop),
 611                                          time(NULL),
 612                                          rand()
 613                                 );
 614                                 syslog(LOG_DEBUG, "Appending to %s", filename);
 615                                 fp = fopen(filename, "ab");
 616                                 if (fp != NULL) {
 617                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 618                                         fclose(fp);
 619                                 }
 620                                 else {
 621                                         syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 622                                 }
 623                                 free(sermsg.ser);
 624                                 CM_Free(msg);
 625                                 FreeStrBuf(&Buf);
 626                                 return;
 627                         }
 628
 629                         else {  /* invalid destination node name */
 630                                 FreeStrBuf(&Buf);
 631
 632                                 network_bounce(&msg,
 633 "A message you sent could not be delivered due to an invalid destination node"
 634 " name.  Please check the address and try sending the message again.\n");
 635                                 return;
 636
 637                         }
 638                 }
 639         }
 640
 641         /*
 642          * Check to see if we already have a copy of this message, and
 643          * abort its processing if so.  (We used to post a warning to Aide>
 644          * every time this happened, but the network is now so densely
 645          * connected that it's inevitable.)
 646          */
 647         if (network_usetable(msg) != 0) {
 648                 CM_Free(msg);
 649                 return;
 650         }
 651
 652         /* Learn network topology from the path */
 653         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 654                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 655                                      msg->cm_fields[eMessagePath],
 656                                      the_netmap,
 657                                      netmap_changed);
 658         }
 659
 660         /* Is the sending node giving us a very persuasive suggestion about
 661          * which room this message should be saved in?  If so, go with that.
 662          */
 663         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 664                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 665         }
 666
 667         /* Otherwise, does it have a recipient?  If so, validate it... */
 668         else if (!CM_IsEmpty(msg, eRecipient)) {
 669                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 670                 if (recp != NULL) if (recp->num_error != 0) {
 671                         network_bounce(&msg,
 672                                 "A message you sent could not be delivered due to an invalid address.\n"
 673                                 "Please check the address and try sending the message again.\n");
 674                         free_recipients(recp);
 675                         syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.");
 676                         return;
 677                 }
 678                 strcpy(target_room, "");        /* no target room if mail */
 679         }
 680
 681         /* Our last shot at finding a home for this message is to see if
 682          * it has the eOriginalRoom (O) field (Originating room) set.
 683          */
 684         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 685                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 686         }
 687
 688         /* Strip out fields that are only relevant during transit */
 689         CM_FlushField(msg, eDestination);
 690         CM_FlushField(msg, eRemoteRoom);
 691
 692         /* save the message into a room */
 693         if (PerformNetprocHooks(msg, target_room) == 0) {
 694                 msg->cm_flags = CM_SKIP_HOOKS;
 695                 CtdlSubmitMsg(msg, recp, target_room, 0);
 696         }
 697         CM_Free(msg);
 698         free_recipients(recp);
 699 }
 700
 701
 702 /*
 703  * Process a single message from a single file from the inbound queue
 704  */
 705 void network_process_message(FILE *fp,
 706                              long msgstart,
 707                              long msgend,
 708                              HashList *working_ignetcfg,
 709                              HashList *the_netmap,
 710                              int *netmap_changed)
 711 {
 712         long hold_pos;
 713         long size;
 714         char *buffer;
 715
 716         hold_pos = ftell(fp);
 717         size = msgend - msgstart + 1;
 718         buffer = malloc(size);
 719         if (buffer != NULL) {
 720                 fseek(fp, msgstart, SEEK_SET);
 721                 if (fread(buffer, size, 1, fp) > 0) {
 722                         network_process_buffer(buffer,
 723                                                size,
 724                                                working_ignetcfg,
 725                                                the_netmap,
 726                                                netmap_changed);
 727                 }
 728                 free(buffer);
 729         }
 730
 731         fseek(fp, hold_pos, SEEK_SET);
 732 }
 733
 734
 735 /*
 736  * Process a single file from the inbound queue
 737  */
 738 void network_process_file(char *filename,
 739                           HashList *working_ignetcfg,
 740                           HashList *the_netmap,
 741                           int *netmap_changed)
 742 {
 743         FILE *fp;
 744         long msgstart = (-1L);
 745         long msgend = (-1L);
 746         long msgcur = 0L;
 747         int ch;
 748         int nMessages = 0;
 749
 750         fp = fopen(filename, "rb");
 751         if (fp == NULL) {
 752                 syslog(LOG_CRIT, "Error opening %s: %s", filename, strerror(errno));
 753                 return;
 754         }
 755
 756         fseek(fp, 0L, SEEK_END);
 757         syslog(LOG_INFO, "network: processing %ld bytes from %s", ftell(fp), filename);
 758         rewind(fp);
 759
 760         /* Look for messages in the data stream and break them out */
 761         while (ch = getc(fp), ch >= 0) {
 762
 763                 if (ch == 255) {
 764                         if (msgstart >= 0L) {
 765                                 msgend = msgcur - 1;
 766                                 network_process_message(fp,
 767                                                         msgstart,
 768                                                         msgend,
 769                                                         working_ignetcfg,
 770                                                         the_netmap,
 771                                                         netmap_changed);
 772                         }
 773                         msgstart = msgcur;
 774                 }
 775
 776                 ++msgcur;
 777                 nMessages ++;
 778         }
 779
 780         msgend = msgcur - 1;
 781         if (msgstart >= 0L) {
 782                 network_process_message(fp,
 783                                         msgstart,
 784                                         msgend,
 785                                         working_ignetcfg,
 786                                         the_netmap,
 787                                         netmap_changed);
 788                 nMessages ++;
 789         }
 790
 791         if (nMessages > 0)
 792                 syslog(LOG_INFO, "network: processed %d messages in %s", nMessages, filename);
 793
 794         fclose(fp);
 795         unlink(filename);
 796 }
 797
 798
 799 /*
 800  * Process anything in the inbound queue
 801  */
 802 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 803 {
 804         DIR *dp;
 805         struct dirent *d;
 806         struct dirent *filedir_entry;
 807         struct stat statbuf;
 808         char filename[PATH_MAX];
 809         static time_t last_spoolin_mtime = 0L;
 810         int d_type = 0;
 811         int d_namelen;
 812
 813         /*
 814          * Check the spoolin directory's modification time.  If it hasn't
 815          * been touched, we don't need to scan it.
 816          */
 817         if (stat(ctdl_netin_dir, &statbuf)) return;
 818         if (statbuf.st_mtime == last_spoolin_mtime) {
 819                 MARKM_syslog(LOG_DEBUG, "network: nothing in inbound queue");
 820                 return;
 821         }
 822         last_spoolin_mtime = statbuf.st_mtime;
 823         MARKM_syslog(LOG_DEBUG, "network: processing inbound queue");
 824
 825         /*
 826          * Ok, there's something interesting in there, so scan it.
 827          */
 828         dp = opendir(ctdl_netin_dir);
 829         if (dp == NULL) return;
 830
 831         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 832         if (d == NULL) {
 833                 closedir(dp);
 834                 return;
 835         }
 836
 837         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 838                (filedir_entry != NULL))
 839         {
 840 #ifdef _DIRENT_HAVE_D_NAMLEN
 841                 d_namelen = filedir_entry->d_namlen;
 842
 843 #else
 844                 d_namelen = strlen(filedir_entry->d_name);
 845 #endif
 846
 847 #ifdef _DIRENT_HAVE_D_TYPE
 848                 d_type = filedir_entry->d_type;
 849 #else
 850                 d_type = DT_UNKNOWN;
 851 #endif
 852                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 853                         continue; /* Ignore backup files... */
 854
 855                 if ((d_namelen == 1) &&
 856                     (filedir_entry->d_name[0] == '.'))
 857                         continue;
 858
 859                 if ((d_namelen == 2) &&
 860                     (filedir_entry->d_name[0] == '.') &&
 861                     (filedir_entry->d_name[1] == '.'))
 862                         continue;
 863
 864                 if (d_type == DT_UNKNOWN) {
 865                         struct stat s;
 866                         char path[PATH_MAX];
 867
 868                         snprintf(path,
 869                                  PATH_MAX,
 870                                  "%s/%s",
 871                                  ctdl_netin_dir,
 872                                  filedir_entry->d_name);
 873
 874                         if (lstat(path, &s) == 0) {
 875                                 d_type = IFTODT(s.st_mode);
 876                         }
 877                 }
 878
 879                 switch (d_type)
 880                 {
 881                 case DT_DIR:
 882                         break;
 883                 case DT_LNK: /* TODO: check whether its a file or a directory */
 884                 case DT_REG:
 885                         snprintf(filename,
 886                                 sizeof filename,
 887                                 "%s/%s",
 888                                 ctdl_netin_dir,
 889                                 d->d_name
 890                         );
 891                         network_process_file(filename,
 892                                              working_ignetcfg,
 893                                              the_netmap,
 894                                              netmap_changed);
 895                 }
 896         }
 897
 898         closedir(dp);
 899         free(d);
 900 }
 901
 902 /*
 903  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 904  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 905  */
 906 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 907 {
 908         IOBuffer IOB;
 909         FDIOBuffer FDIO;
 910         int d_namelen;
 911         DIR *dp;
 912         struct dirent *d;
 913         struct dirent *filedir_entry;
 914         const char *pch;
 915         char spooloutfilename[PATH_MAX];
 916         char filename[PATH_MAX];
 917         const StrBuf *nexthop;
 918         StrBuf *NextHop;
 919         int i;
 920         struct stat statbuf;
 921         int nFailed = 0;
 922         int d_type = 0;
 923
 924
 925         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 926         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 927         if (d == NULL)  return;
 928
 929         dp = opendir(ctdl_netout_dir);
 930         if (dp == NULL) {
 931                 free(d);
 932                 return;
 933         }
 934
 935         NextHop = NewStrBuf();
 936         memset(&IOB, 0, sizeof(IOBuffer));
 937         memset(&FDIO, 0, sizeof(FDIOBuffer));
 938         FDIO.IOB = &IOB;
 939
 940         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 941                (filedir_entry != NULL))
 942         {
 943 #ifdef _DIRENT_HAVE_D_NAMLEN
 944                 d_namelen = filedir_entry->d_namlen;
 945
 946 #else
 947                 d_namelen = strlen(filedir_entry->d_name);
 948 #endif
 949
 950 #ifdef _DIRENT_HAVE_D_TYPE
 951                 d_type = filedir_entry->d_type;
 952 #else
 953                 d_type = DT_UNKNOWN;
 954 #endif
 955                 if (d_type == DT_DIR)
 956                         continue;
 957
 958                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 959                         continue; /* Ignore backup files... */
 960
 961                 if ((d_namelen == 1) &&
 962                     (filedir_entry->d_name[0] == '.'))
 963                         continue;
 964
 965                 if ((d_namelen == 2) &&
 966                     (filedir_entry->d_name[0] == '.') &&
 967                     (filedir_entry->d_name[1] == '.'))
 968                         continue;
 969
 970                 pch = strchr(filedir_entry->d_name, '@');
 971                 if (pch == NULL)
 972                         continue;
 973
 974                 snprintf(filename,
 975                          sizeof filename,
 976                          "%s/%s",
 977                          ctdl_netout_dir,
 978                          filedir_entry->d_name);
 979
 980                 StrBufPlain(NextHop,
 981                             filedir_entry->d_name,
 982                             pch - filedir_entry->d_name);
 983
 984                 snprintf(spooloutfilename,
 985                          sizeof spooloutfilename,
 986                          "%s/%s",
 987                          ctdl_netout_dir,
 988                          ChrPtr(NextHop));
 989
 990                 syslog(LOG_DEBUG, "Consolidate %s to %s", filename, ChrPtr(NextHop));
 991                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
 992                         nFailed++;
 993                         syslog(LOG_DEBUG, "Currently online with %s - skipping for now", ChrPtr(NextHop));
 994                 }
 995                 else {
 996                         size_t dsize;
 997                         size_t fsize;
 998                         int infd, outfd;
 999                         const char *err = NULL;
1000                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
1001
1002                         infd = open(filename, O_RDONLY);
1003                         if (infd == -1) {
1004                                 nFailed++;
1005                                 syslog(LOG_ERR,
1006                                           "failed to open %s for reading due to %s; skipping.",
1007                                           filename, strerror(errno)
1008                                 );
1009                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1010                                 continue;
1011                         }
1012
1013                         outfd = open(spooloutfilename,
1014                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1015                                   S_IRUSR|S_IWUSR);
1016                         if (outfd == -1)
1017                         {
1018                                 outfd = open(spooloutfilename,
1019                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1020                                              S_IRUSR | S_IWUSR);
1021                         }
1022                         if (outfd == -1) {
1023                                 nFailed++;
1024                                 syslog(LOG_ERR,
1025                                           "failed to open %s for reading due to %s; skipping.",
1026                                           spooloutfilename, strerror(errno)
1027                                 );
1028                                 close(infd);
1029                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1030                                 continue;
1031                         }
1032
1033                         dsize = lseek(outfd, 0, SEEK_END);
1034                         lseek(outfd, -dsize, SEEK_SET);
1035
1036                         fstat(infd, &statbuf);
1037                         fsize = statbuf.st_size;
1038 /*
1039                         fsize = lseek(infd, 0, SEEK_END);
1040 */
1041                         IOB.fd = infd;
1042                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1043                         FDIO.ChunkSendRemain = fsize;
1044                         FDIO.TotalSentAlready = dsize;
1045                         err = NULL;
1046                         errno = 0;
1047                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1048                         if (err == NULL) {
1049                                 unlink(filename);
1050                                 syslog(LOG_DEBUG, "Spoolfile %s now "SIZE_T_FMT" KB", spooloutfilename, (dsize + fsize)/1024);
1051                         }
1052                         else {
1053                                 nFailed++;
1054                                 syslog(LOG_ERR, "failed to append to %s [%s]; rolling back..", spooloutfilename, strerror(errno));
1055                                 /* whoops partial append?? truncate spooloutfilename again! */
1056                                 ftruncate(outfd, dsize);
1057                         }
1058                         FDIOBufferDelete(&FDIO);
1059                         close(infd);
1060                         close(outfd);
1061                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1062                 }
1063         }
1064         closedir(dp);
1065
1066         if (nFailed > 0) {
1067                 FreeStrBuf(&NextHop);
1068                 syslog(LOG_INFO, "skipping Spoolcleanup because of %d files unprocessed.", nFailed);
1069
1070                 return;
1071         }
1072
1073         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1074         dp = opendir(ctdl_netout_dir);
1075         if (dp == NULL) {
1076                 FreeStrBuf(&NextHop);
1077                 free(d);
1078                 return;
1079         }
1080
1081         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1082                (filedir_entry != NULL))
1083         {
1084 #ifdef _DIRENT_HAVE_D_NAMLEN
1085                 d_namelen = filedir_entry->d_namlen;
1086
1087 #else
1088                 d_namelen = strlen(filedir_entry->d_name);
1089 #endif
1090
1091 #ifdef _DIRENT_HAVE_D_TYPE
1092                 d_type = filedir_entry->d_type;
1093 #else
1094                 d_type = DT_UNKNOWN;
1095 #endif
1096                 if (d_type == DT_DIR)
1097                         continue;
1098
1099                 if ((d_namelen == 1) &&
1100                     (filedir_entry->d_name[0] == '.'))
1101                         continue;
1102
1103                 if ((d_namelen == 2) &&
1104                     (filedir_entry->d_name[0] == '.') &&
1105                     (filedir_entry->d_name[1] == '.'))
1106                         continue;
1107
1108                 pch = strchr(filedir_entry->d_name, '@');
1109                 if (pch == NULL) /* no @ in name? consolidated file. */
1110                         continue;
1111
1112                 StrBufPlain(NextHop,
1113                             filedir_entry->d_name,
1114                             pch - filedir_entry->d_name);
1115
1116                 snprintf(filename,
1117                         sizeof filename,
1118                         "%s/%s",
1119                         ctdl_netout_dir,
1120                         filedir_entry->d_name
1121                 );
1122
1123                 i = CtdlIsValidNode(&nexthop,
1124                                     NULL,
1125                                     NextHop,
1126                                     working_ignetcfg,
1127                                     the_netmap);
1128
1129                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1130                         unlink(filename);
1131                 }
1132         }
1133         FreeStrBuf(&NextHop);
1134         free(d);
1135         closedir(dp);
1136 }
1137
1138 void free_spoolcontrol_struct(SpoolControl **sc)
1139 {
1140         free_spoolcontrol_struct_members(*sc);
1141         free(*sc);
1142         *sc = NULL;
1143 }
1144
1145 void free_spoolcontrol_struct_members(SpoolControl *sc)
1146 {
1147         int i;
1148         FreeStrBuf(&sc->RoomInfo);
1149         FreeStrBuf(&sc->ListID);
1150         for (i = 0; i < maxRoomNetCfg; i++)
1151                 FreeStrBuf(&sc->Users[i]);
1152 }
1153
1154
1155
1156 /*
1157  * It's ok if these directories already exist.  Just fail silently.
1158  */
1159 void create_spool_dirs(void) {
1160         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1161                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1162         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1163                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1164         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1165                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1166         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1167                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1168         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1169                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1170         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1171                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1172         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1173                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1174         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1175                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1176 }
1177
1178 /*
1179  * Module entry point
1180  */
1181 CTDL_MODULE_INIT(network_spool)
1182 {
1183         if (!threading)
1184         {
1185                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1186                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1187                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1188                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1189                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1190                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1191                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1192                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1193
1194                 create_spool_dirs();
1195 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1196         }
1197         return "network_spool";
1198 }