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 static time_t last_digest_delivery = 0;
 414
 415 /*
 416  * Batch up and send all outbound traffic from the current room
 417  */
 418 void network_spoolout_room(SpoolControl *sc)
 419 {
 420         struct CitContext *CCC = CC;
 421         char buf[SIZ];
 422         int i;
 423         long lastsent;
 424
 425         /*
 426          * If the room doesn't exist, don't try to perform its networking tasks.
 427          * Normally this should never happen, but once in a while maybe a room gets
 428          * queued for networking and then deleted before it can happen.
 429          */
 430         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 431
 432         syslog(LOG_INFO, "network_spoolout_room(room=%s, lastsent=%ld)", CCC->room.QRname, sc->lastsent);
 433
 434         CalcListID(sc);
 435
 436         /* remember where we started... */
 437         lastsent = sc->lastsent;
 438
 439         /* Fetch the messages we ought to send & prepare them. */
 440         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL, network_spool_msg, sc);
 441
 442         if (StrLength(sc->Users[roommailalias]) > 0)
 443         {
 444                 long len;
 445                 len = StrLength(sc->Users[roommailalias]);
 446                 if (len + 1 > sizeof(buf))
 447                         len = sizeof(buf) - 1;
 448                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 449                 buf[len] = '\0';
 450         }
 451         else
 452         {
 453                 snprintf(buf, sizeof buf, "room_%s@%s",
 454                          CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
 455         }
 456
 457         for (i=0; buf[i]; ++i) {
 458                 buf[i] = tolower(buf[i]);
 459                 if (isspace(buf[i])) buf[i] = '_';
 460         }
 461
 462
 463         /* If we wrote a digest, deliver it and then close it */
 464         if (sc->Users[digestrecp] != NULL) {
 465                 time_t now = time(NULL);
 466                 time_t secs_today = now % (24 * 60 * 60);
 467                 long delta = 0;
 468
 469                 if (last_digest_delivery != 0) {
 470                         delta = now - last_digest_delivery;
 471                         delta = (24 * 60 * 60) - delta;
 472                 }
 473
 474                 if ((secs_today < 300) &&
 475                     (delta < 300))
 476                 {
 477                         if (sc->digestfp == NULL) {
 478                                 sc->digestfp = create_digest_file(&sc->room, 0);
 479                         }
 480                         if (sc->digestfp != NULL) {
 481                                 last_digest_delivery = now;
 482                                 fprintf(sc->digestfp,
 483                                         " -----------------------------------"
 484                                         "------------------------------------"
 485                                         "-------\n"
 486                                         "You are subscribed to the '%s' "
 487                                         "list.\n"
 488                                         "To post to the list: %s\n",
 489                                         CCC->room.QRname, buf
 490                                         );
 491                                 network_deliver_digest(sc);     /* deliver */
 492                                 remove_digest_file(&sc->room);
 493                         }
 494                 }
 495         }
 496         if (sc->digestfp != NULL) {
 497                 fclose(sc->digestfp);
 498                 sc->digestfp = NULL;
 499         }
 500
 501         /* Now rewrite the netconfig */
 502         syslog(LOG_DEBUG, "lastsent was %ld , now it is %ld", lastsent, sc->lastsent);
 503         if (sc->lastsent != lastsent)
 504         {
 505                 OneRoomNetCfg *r;
 506
 507                 begin_critical_section(S_NETCONFIGS);
 508                 r = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 509                 r->lastsent = sc->lastsent;
 510                 SaveRoomNetConfigFile(r, sc->room.QRnumber);
 511                 FreeRoomNetworkStruct(&r);
 512                 end_critical_section(S_NETCONFIGS);
 513         }
 514 }
 515
 516
 517 /*
 518  * Check the use table.  This is a list of messages which have recently
 519  * arrived on the system.  It is maintained and queried to prevent the same
 520  * message from being entered into the database multiple times if it happens
 521  * to arrive multiple times by accident.
 522  */
 523 int network_usetable(struct CtdlMessage *msg)
 524 {
 525         StrBuf *msgid;
 526         struct CitContext *CCC = CC;
 527         time_t now;
 528
 529         /* Bail out if we can't generate a message ID */
 530         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 531         {
 532                 return(0);
 533         }
 534
 535         /* Generate the message ID */
 536         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 537         if (haschar(ChrPtr(msgid), '@') == 0) {
 538                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 539                 if (!CM_IsEmpty(msg, eNodeName)) {
 540                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 541                 }
 542                 else {
 543                         FreeStrBuf(&msgid);
 544                         return(0);
 545                 }
 546         }
 547         now = time(NULL);
 548         if (CheckIfAlreadySeen("Networker Import",
 549                                msgid,
 550                                now, 0,
 551                                eUpdate,
 552                                CCC->cs_pid, 0) != 0)
 553         {
 554                 FreeStrBuf(&msgid);
 555                 return(1);
 556         }
 557         FreeStrBuf(&msgid);
 558
 559         return(0);
 560 }
 561
 562
 563 /*
 564  * Process a buffer containing a single message from a single file
 565  * from the inbound queue
 566  */
 567 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 568 {
 569         long len;
 570         StrBuf *Buf = NULL;
 571         struct CtdlMessage *msg = NULL;
 572         long pos;
 573         int field;
 574         recptypes *recp = NULL;
 575         char target_room[ROOMNAMELEN];
 576         struct ser_ret sermsg;
 577         char filename[PATH_MAX];
 578         FILE *fp;
 579         const StrBuf *nexthop = NULL;
 580         unsigned char firstbyte;
 581         unsigned char lastbyte;
 582
 583         syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes", size);
 584
 585         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 586         firstbyte = buffer[0];
 587         lastbyte = buffer[size-1];
 588         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 589                 syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d", size, firstbyte, lastbyte);
 590                 return;
 591         }
 592
 593         /* Set default target room to trash */
 594         strcpy(target_room, TWITROOM);
 595
 596         /* Load the message into memory */
 597         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 598         memset(msg, 0, sizeof(struct CtdlMessage));
 599         msg->cm_magic = CTDLMESSAGE_MAGIC;
 600         msg->cm_anon_type = buffer[1];
 601         msg->cm_format_type = buffer[2];
 602
 603         for (pos = 3; pos < size; ++pos) {
 604                 field = buffer[pos];
 605                 len = strlen(buffer + pos + 1);
 606                 CM_SetField(msg, field, buffer + pos + 1, len);
 607                 pos = pos + len + 1;
 608         }
 609
 610         /* Check for message routing */
 611         if (!CM_IsEmpty(msg, eDestination)) {
 612                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 613
 614                         /* route the message */
 615                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 616                         if (CtdlIsValidNode(&nexthop,
 617                                             NULL,
 618                                             Buf,
 619                                             working_ignetcfg,
 620                                             the_netmap) == 0)
 621                         {
 622                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 623
 624                                 /* serialize the message */
 625                                 CtdlSerializeMessage(&sermsg, msg);
 626
 627                                 /* now send it */
 628                                 if (StrLength(nexthop) == 0) {
 629                                         nexthop = Buf;
 630                                 }
 631                                 snprintf(filename,
 632                                          sizeof filename,
 633                                          "%s/%s@%lx%x",
 634                                          ctdl_netout_dir,
 635                                          ChrPtr(nexthop),
 636                                          time(NULL),
 637                                          rand()
 638                                 );
 639                                 syslog(LOG_DEBUG, "Appending to %s", filename);
 640                                 fp = fopen(filename, "ab");
 641                                 if (fp != NULL) {
 642                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 643                                         fclose(fp);
 644                                 }
 645                                 else {
 646                                         syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 647                                 }
 648                                 free(sermsg.ser);
 649                                 CM_Free(msg);
 650                                 FreeStrBuf(&Buf);
 651                                 return;
 652                         }
 653
 654                         else {  /* invalid destination node name */
 655                                 FreeStrBuf(&Buf);
 656
 657                                 network_bounce(&msg,
 658 "A message you sent could not be delivered due to an invalid destination node"
 659 " name.  Please check the address and try sending the message again.\n");
 660                                 return;
 661
 662                         }
 663                 }
 664         }
 665
 666         /*
 667          * Check to see if we already have a copy of this message, and
 668          * abort its processing if so.  (We used to post a warning to Aide>
 669          * every time this happened, but the network is now so densely
 670          * connected that it's inevitable.)
 671          */
 672         if (network_usetable(msg) != 0) {
 673                 CM_Free(msg);
 674                 return;
 675         }
 676
 677         /* Learn network topology from the path */
 678         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 679                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 680                                      msg->cm_fields[eMessagePath],
 681                                      the_netmap,
 682                                      netmap_changed);
 683         }
 684
 685         /* Is the sending node giving us a very persuasive suggestion about
 686          * which room this message should be saved in?  If so, go with that.
 687          */
 688         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 689                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 690         }
 691
 692         /* Otherwise, does it have a recipient?  If so, validate it... */
 693         else if (!CM_IsEmpty(msg, eRecipient)) {
 694                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 695                 if (recp != NULL) if (recp->num_error != 0) {
 696                         network_bounce(&msg,
 697                                 "A message you sent could not be delivered due to an invalid address.\n"
 698                                 "Please check the address and try sending the message again.\n");
 699                         free_recipients(recp);
 700                         syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.");
 701                         return;
 702                 }
 703                 strcpy(target_room, "");        /* no target room if mail */
 704         }
 705
 706         /* Our last shot at finding a home for this message is to see if
 707          * it has the eOriginalRoom (O) field (Originating room) set.
 708          */
 709         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 710                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 711         }
 712
 713         /* Strip out fields that are only relevant during transit */
 714         CM_FlushField(msg, eDestination);
 715         CM_FlushField(msg, eRemoteRoom);
 716
 717         /* save the message into a room */
 718         if (PerformNetprocHooks(msg, target_room) == 0) {
 719                 msg->cm_flags = CM_SKIP_HOOKS;
 720                 CtdlSubmitMsg(msg, recp, target_room, 0);
 721         }
 722         CM_Free(msg);
 723         free_recipients(recp);
 724 }
 725
 726
 727 /*
 728  * Process a single message from a single file from the inbound queue
 729  */
 730 void network_process_message(FILE *fp,
 731                              long msgstart,
 732                              long msgend,
 733                              HashList *working_ignetcfg,
 734                              HashList *the_netmap,
 735                              int *netmap_changed)
 736 {
 737         long hold_pos;
 738         long size;
 739         char *buffer;
 740
 741         hold_pos = ftell(fp);
 742         size = msgend - msgstart + 1;
 743         buffer = malloc(size);
 744         if (buffer != NULL) {
 745                 fseek(fp, msgstart, SEEK_SET);
 746                 if (fread(buffer, size, 1, fp) > 0) {
 747                         network_process_buffer(buffer,
 748                                                size,
 749                                                working_ignetcfg,
 750                                                the_netmap,
 751                                                netmap_changed);
 752                 }
 753                 free(buffer);
 754         }
 755
 756         fseek(fp, hold_pos, SEEK_SET);
 757 }
 758
 759
 760 /*
 761  * Process a single file from the inbound queue
 762  */
 763 void network_process_file(char *filename,
 764                           HashList *working_ignetcfg,
 765                           HashList *the_netmap,
 766                           int *netmap_changed)
 767 {
 768         FILE *fp;
 769         long msgstart = (-1L);
 770         long msgend = (-1L);
 771         long msgcur = 0L;
 772         int ch;
 773         int nMessages = 0;
 774
 775         fp = fopen(filename, "rb");
 776         if (fp == NULL) {
 777                 syslog(LOG_CRIT, "Error opening %s: %s", filename, strerror(errno));
 778                 return;
 779         }
 780
 781         fseek(fp, 0L, SEEK_END);
 782         syslog(LOG_INFO, "network: processing %ld bytes from %s", ftell(fp), filename);
 783         rewind(fp);
 784
 785         /* Look for messages in the data stream and break them out */
 786         while (ch = getc(fp), ch >= 0) {
 787
 788                 if (ch == 255) {
 789                         if (msgstart >= 0L) {
 790                                 msgend = msgcur - 1;
 791                                 network_process_message(fp,
 792                                                         msgstart,
 793                                                         msgend,
 794                                                         working_ignetcfg,
 795                                                         the_netmap,
 796                                                         netmap_changed);
 797                         }
 798                         msgstart = msgcur;
 799                 }
 800
 801                 ++msgcur;
 802                 nMessages ++;
 803         }
 804
 805         msgend = msgcur - 1;
 806         if (msgstart >= 0L) {
 807                 network_process_message(fp,
 808                                         msgstart,
 809                                         msgend,
 810                                         working_ignetcfg,
 811                                         the_netmap,
 812                                         netmap_changed);
 813                 nMessages ++;
 814         }
 815
 816         if (nMessages > 0)
 817                 syslog(LOG_INFO, "network: processed %d messages in %s", nMessages, filename);
 818
 819         fclose(fp);
 820         unlink(filename);
 821 }
 822
 823
 824 /*
 825  * Process anything in the inbound queue
 826  */
 827 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 828 {
 829         DIR *dp;
 830         struct dirent *d;
 831         struct dirent *filedir_entry;
 832         struct stat statbuf;
 833         char filename[PATH_MAX];
 834         static time_t last_spoolin_mtime = 0L;
 835         int d_type = 0;
 836         int d_namelen;
 837
 838         /*
 839          * Check the spoolin directory's modification time.  If it hasn't
 840          * been touched, we don't need to scan it.
 841          */
 842         if (stat(ctdl_netin_dir, &statbuf)) return;
 843         if (statbuf.st_mtime == last_spoolin_mtime) {
 844                 MARKM_syslog(LOG_DEBUG, "network: nothing in inbound queue");
 845                 return;
 846         }
 847         last_spoolin_mtime = statbuf.st_mtime;
 848         MARKM_syslog(LOG_DEBUG, "network: processing inbound queue");
 849
 850         /*
 851          * Ok, there's something interesting in there, so scan it.
 852          */
 853         dp = opendir(ctdl_netin_dir);
 854         if (dp == NULL) return;
 855
 856         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 857         if (d == NULL) {
 858                 closedir(dp);
 859                 return;
 860         }
 861
 862         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 863                (filedir_entry != NULL))
 864         {
 865 #ifdef _DIRENT_HAVE_D_NAMLEN
 866                 d_namelen = filedir_entry->d_namlen;
 867
 868 #else
 869                 d_namelen = strlen(filedir_entry->d_name);
 870 #endif
 871
 872 #ifdef _DIRENT_HAVE_D_TYPE
 873                 d_type = filedir_entry->d_type;
 874 #else
 875                 d_type = DT_UNKNOWN;
 876 #endif
 877                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 878                         continue; /* Ignore backup files... */
 879
 880                 if ((d_namelen == 1) &&
 881                     (filedir_entry->d_name[0] == '.'))
 882                         continue;
 883
 884                 if ((d_namelen == 2) &&
 885                     (filedir_entry->d_name[0] == '.') &&
 886                     (filedir_entry->d_name[1] == '.'))
 887                         continue;
 888
 889                 if (d_type == DT_UNKNOWN) {
 890                         struct stat s;
 891                         char path[PATH_MAX];
 892
 893                         snprintf(path,
 894                                  PATH_MAX,
 895                                  "%s/%s",
 896                                  ctdl_netin_dir,
 897                                  filedir_entry->d_name);
 898
 899                         if (lstat(path, &s) == 0) {
 900                                 d_type = IFTODT(s.st_mode);
 901                         }
 902                 }
 903
 904                 switch (d_type)
 905                 {
 906                 case DT_DIR:
 907                         break;
 908                 case DT_LNK: /* TODO: check whether its a file or a directory */
 909                 case DT_REG:
 910                         snprintf(filename,
 911                                 sizeof filename,
 912                                 "%s/%s",
 913                                 ctdl_netin_dir,
 914                                 d->d_name
 915                         );
 916                         network_process_file(filename,
 917                                              working_ignetcfg,
 918                                              the_netmap,
 919                                              netmap_changed);
 920                 }
 921         }
 922
 923         closedir(dp);
 924         free(d);
 925 }
 926
 927 /*
 928  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 929  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 930  */
 931 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 932 {
 933         IOBuffer IOB;
 934         FDIOBuffer FDIO;
 935         int d_namelen;
 936         DIR *dp;
 937         struct dirent *d;
 938         struct dirent *filedir_entry;
 939         const char *pch;
 940         char spooloutfilename[PATH_MAX];
 941         char filename[PATH_MAX];
 942         const StrBuf *nexthop;
 943         StrBuf *NextHop;
 944         int i;
 945         struct stat statbuf;
 946         int nFailed = 0;
 947         int d_type = 0;
 948
 949
 950         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 951         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 952         if (d == NULL)  return;
 953
 954         dp = opendir(ctdl_netout_dir);
 955         if (dp == NULL) {
 956                 free(d);
 957                 return;
 958         }
 959
 960         NextHop = NewStrBuf();
 961         memset(&IOB, 0, sizeof(IOBuffer));
 962         memset(&FDIO, 0, sizeof(FDIOBuffer));
 963         FDIO.IOB = &IOB;
 964
 965         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 966                (filedir_entry != NULL))
 967         {
 968 #ifdef _DIRENT_HAVE_D_NAMLEN
 969                 d_namelen = filedir_entry->d_namlen;
 970
 971 #else
 972                 d_namelen = strlen(filedir_entry->d_name);
 973 #endif
 974
 975 #ifdef _DIRENT_HAVE_D_TYPE
 976                 d_type = filedir_entry->d_type;
 977 #else
 978                 d_type = DT_UNKNOWN;
 979 #endif
 980                 if (d_type == DT_DIR)
 981                         continue;
 982
 983                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 984                         continue; /* Ignore backup files... */
 985
 986                 if ((d_namelen == 1) &&
 987                     (filedir_entry->d_name[0] == '.'))
 988                         continue;
 989
 990                 if ((d_namelen == 2) &&
 991                     (filedir_entry->d_name[0] == '.') &&
 992                     (filedir_entry->d_name[1] == '.'))
 993                         continue;
 994
 995                 pch = strchr(filedir_entry->d_name, '@');
 996                 if (pch == NULL)
 997                         continue;
 998
 999                 snprintf(filename,
1000                          sizeof filename,
1001                          "%s/%s",
1002                          ctdl_netout_dir,
1003                          filedir_entry->d_name);
1004
1005                 StrBufPlain(NextHop,
1006                             filedir_entry->d_name,
1007                             pch - filedir_entry->d_name);
1008
1009                 snprintf(spooloutfilename,
1010                          sizeof spooloutfilename,
1011                          "%s/%s",
1012                          ctdl_netout_dir,
1013                          ChrPtr(NextHop));
1014
1015                 syslog(LOG_DEBUG, "Consolidate %s to %s", filename, ChrPtr(NextHop));
1016                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
1017                         nFailed++;
1018                         syslog(LOG_DEBUG, "Currently online with %s - skipping for now", ChrPtr(NextHop));
1019                 }
1020                 else {
1021                         size_t dsize;
1022                         size_t fsize;
1023                         int infd, outfd;
1024                         const char *err = NULL;
1025                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
1026
1027                         infd = open(filename, O_RDONLY);
1028                         if (infd == -1) {
1029                                 nFailed++;
1030                                 syslog(LOG_ERR,
1031                                           "failed to open %s for reading due to %s; skipping.",
1032                                           filename, strerror(errno)
1033                                 );
1034                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1035                                 continue;
1036                         }
1037
1038                         outfd = open(spooloutfilename,
1039                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1040                                   S_IRUSR|S_IWUSR);
1041                         if (outfd == -1)
1042                         {
1043                                 outfd = open(spooloutfilename,
1044                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1045                                              S_IRUSR | S_IWUSR);
1046                         }
1047                         if (outfd == -1) {
1048                                 nFailed++;
1049                                 syslog(LOG_ERR,
1050                                           "failed to open %s for reading due to %s; skipping.",
1051                                           spooloutfilename, strerror(errno)
1052                                 );
1053                                 close(infd);
1054                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1055                                 continue;
1056                         }
1057
1058                         dsize = lseek(outfd, 0, SEEK_END);
1059                         lseek(outfd, -dsize, SEEK_SET);
1060
1061                         fstat(infd, &statbuf);
1062                         fsize = statbuf.st_size;
1063 /*
1064                         fsize = lseek(infd, 0, SEEK_END);
1065 */
1066                         IOB.fd = infd;
1067                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1068                         FDIO.ChunkSendRemain = fsize;
1069                         FDIO.TotalSentAlready = dsize;
1070                         err = NULL;
1071                         errno = 0;
1072                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1073                         if (err == NULL) {
1074                                 unlink(filename);
1075                                 syslog(LOG_DEBUG, "Spoolfile %s now "SIZE_T_FMT" KB", spooloutfilename, (dsize + fsize)/1024);
1076                         }
1077                         else {
1078                                 nFailed++;
1079                                 syslog(LOG_ERR, "failed to append to %s [%s]; rolling back..", spooloutfilename, strerror(errno));
1080                                 /* whoops partial append?? truncate spooloutfilename again! */
1081                                 ftruncate(outfd, dsize);
1082                         }
1083                         FDIOBufferDelete(&FDIO);
1084                         close(infd);
1085                         close(outfd);
1086                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1087                 }
1088         }
1089         closedir(dp);
1090
1091         if (nFailed > 0) {
1092                 FreeStrBuf(&NextHop);
1093                 syslog(LOG_INFO, "skipping Spoolcleanup because of %d files unprocessed.", nFailed);
1094
1095                 return;
1096         }
1097
1098         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1099         dp = opendir(ctdl_netout_dir);
1100         if (dp == NULL) {
1101                 FreeStrBuf(&NextHop);
1102                 free(d);
1103                 return;
1104         }
1105
1106         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1107                (filedir_entry != NULL))
1108         {
1109 #ifdef _DIRENT_HAVE_D_NAMLEN
1110                 d_namelen = filedir_entry->d_namlen;
1111
1112 #else
1113                 d_namelen = strlen(filedir_entry->d_name);
1114 #endif
1115
1116 #ifdef _DIRENT_HAVE_D_TYPE
1117                 d_type = filedir_entry->d_type;
1118 #else
1119                 d_type = DT_UNKNOWN;
1120 #endif
1121                 if (d_type == DT_DIR)
1122                         continue;
1123
1124                 if ((d_namelen == 1) &&
1125                     (filedir_entry->d_name[0] == '.'))
1126                         continue;
1127
1128                 if ((d_namelen == 2) &&
1129                     (filedir_entry->d_name[0] == '.') &&
1130                     (filedir_entry->d_name[1] == '.'))
1131                         continue;
1132
1133                 pch = strchr(filedir_entry->d_name, '@');
1134                 if (pch == NULL) /* no @ in name? consolidated file. */
1135                         continue;
1136
1137                 StrBufPlain(NextHop,
1138                             filedir_entry->d_name,
1139                             pch - filedir_entry->d_name);
1140
1141                 snprintf(filename,
1142                         sizeof filename,
1143                         "%s/%s",
1144                         ctdl_netout_dir,
1145                         filedir_entry->d_name
1146                 );
1147
1148                 i = CtdlIsValidNode(&nexthop,
1149                                     NULL,
1150                                     NextHop,
1151                                     working_ignetcfg,
1152                                     the_netmap);
1153
1154                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1155                         unlink(filename);
1156                 }
1157         }
1158         FreeStrBuf(&NextHop);
1159         free(d);
1160         closedir(dp);
1161 }
1162
1163 void free_spoolcontrol_struct(SpoolControl **sc)
1164 {
1165         free_spoolcontrol_struct_members(*sc);
1166         free(*sc);
1167         *sc = NULL;
1168 }
1169
1170 void free_spoolcontrol_struct_members(SpoolControl *sc)
1171 {
1172         int i;
1173         FreeStrBuf(&sc->RoomInfo);
1174         FreeStrBuf(&sc->ListID);
1175         for (i = 0; i < maxRoomNetCfg; i++)
1176                 FreeStrBuf(&sc->Users[i]);
1177 }
1178
1179
1180
1181 /*
1182  * It's ok if these directories already exist.  Just fail silently.
1183  */
1184 void create_spool_dirs(void) {
1185         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1186                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1187         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1188                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1189         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1190                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1191         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1192                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1193         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1194                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1195         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1196                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1197         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1198                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1199         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1200                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1201 }
1202
1203 /*
1204  * Module entry point
1205  */
1206 CTDL_MODULE_INIT(network_spool)
1207 {
1208         if (!threading)
1209         {
1210                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1211                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1212                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1213                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1214                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1215                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1216                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1217                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1218
1219                 create_spool_dirs();
1220 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1221         }
1222         return "network_spool";
1223 }