citadel/modules/network/serv_netspool.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2017 by the citadel.org team
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License, version 3.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  16  * This is a fairly high-level type of critical section.  It ensures that no
  17  * two threads work on the netconfigs files at the same time.  Since we do
  18  * so many things inside these, here are the rules:
  19  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  20  *  2. Do *not* perform any I/O with the client during these sections.
  21  *
  22  */
  23
  24 /*
  25  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  26  * requests that have not been confirmed will be deleted.
  27  */
  28 #define EXP     259200  /* three days */
  29
  30 #include "sysdep.h"
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <fcntl.h>
  35 #include <ctype.h>
  36 #include <signal.h>
  37 #include <pwd.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <dirent.h>
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52 #ifdef HAVE_SYSCALL_H
  53 # include <syscall.h>
  54 #else
  55 # if HAVE_SYS_SYSCALL_H
  56 #  include <sys/syscall.h>
  57 # endif
  58 #endif
  59
  60 #include <sys/wait.h>
  61 #include <string.h>
  62 #include <limits.h>
  63 #include <assert.h>
  64 #include <libcitadel.h>
  65 #include "citadel.h"
  66 #include "server.h"
  67 #include "citserver.h"
  68 #include "support.h"
  69 #include "config.h"
  70 #include "user_ops.h"
  71 #include "database.h"
  72 #include "msgbase.h"
  73 #include "internet_addressing.h"
  74 #include "serv_network.h"
  75 #include "clientsocket.h"
  76 #include "citadel_dirs.h"
  77 #include "threads.h"
  78 #include "context.h"
  79
  80 #include "ctdl_module.h"
  81
  82 #include "netspool.h"
  83 #include "netmail.h"
  84
  85
  86 #ifndef DT_UNKNOWN
  87 #define DT_UNKNOWN     0
  88 #define DT_DIR         4
  89 #define DT_REG         8
  90 #define DT_LNK         10
  91
  92 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
  93 #define DTTOIF(dirtype)        ((dirtype) << 12)
  94 #endif
  95
  96
  97 /*
  98  * Bounce a message back to the sender
  99  */
 100 void network_bounce(struct CtdlMessage **pMsg, char *reason)
 101 {
 102         char buf[SIZ];
 103         char bouncesource[SIZ];
 104         char recipient[SIZ];
 105         recptypes *valid = NULL;
 106         char force_room[ROOMNAMELEN];
 107         static int serialnum = 0;
 108         long len;
 109         struct CtdlMessage *msg = *pMsg;
 110         *pMsg = NULL;
 111         syslog(LOG_DEBUG, "netspool: 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, "netspool: 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, "netspool: 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, "netspool: 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, "netspool: 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                 syslog(LOG_DEBUG, "netspool: 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, "netspool: 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, "netspool: 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
 502         /* Bail out if we can't generate a message ID */
 503         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 504         {
 505                 return(0);
 506         }
 507
 508         /* Generate the message ID */
 509         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 510         if (haschar(ChrPtr(msgid), '@') == 0) {
 511                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 512                 if (!CM_IsEmpty(msg, eNodeName)) {
 513                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 514                 }
 515                 else {
 516                         FreeStrBuf(&msgid);
 517                         return(0);
 518                 }
 519         }
 520         if (CheckIfAlreadySeen(msgid)) {
 521                 FreeStrBuf(&msgid);
 522                 return(1);
 523         }
 524         FreeStrBuf(&msgid);
 525
 526         return(0);
 527 }
 528
 529
 530 /*
 531  * Process a buffer containing a single message from a single file
 532  * from the inbound queue
 533  */
 534 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 535 {
 536         long len;
 537         StrBuf *Buf = NULL;
 538         struct CtdlMessage *msg = NULL;
 539         long pos;
 540         int field;
 541         recptypes *recp = NULL;
 542         char target_room[ROOMNAMELEN];
 543         struct ser_ret sermsg;
 544         char filename[PATH_MAX];
 545         FILE *fp;
 546         const StrBuf *nexthop = NULL;
 547         unsigned char firstbyte;
 548         unsigned char lastbyte;
 549
 550         syslog(LOG_DEBUG, "netspool: network_process_buffer() processing %ld bytes", size);
 551
 552         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 553         firstbyte = buffer[0];
 554         lastbyte = buffer[size-1];
 555         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 556                 syslog(LOG_ERR, "netspool: corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d", size, firstbyte, lastbyte);
 557                 return;
 558         }
 559
 560         /* Set default target room to trash */
 561         strcpy(target_room, TWITROOM);
 562
 563         /* Load the message into memory */
 564         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 565         memset(msg, 0, sizeof(struct CtdlMessage));
 566         msg->cm_magic = CTDLMESSAGE_MAGIC;
 567         msg->cm_anon_type = buffer[1];
 568         msg->cm_format_type = buffer[2];
 569
 570         for (pos = 3; pos < size; ++pos) {
 571                 field = buffer[pos];
 572                 len = strlen(buffer + pos + 1);
 573                 CM_SetField(msg, field, buffer + pos + 1, len);
 574                 pos = pos + len + 1;
 575         }
 576
 577         /* Check for message routing */
 578         if (!CM_IsEmpty(msg, eDestination)) {
 579                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 580
 581                         /* route the message */
 582                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 583                         if (CtdlIsValidNode(&nexthop,
 584                                             NULL,
 585                                             Buf,
 586                                             working_ignetcfg,
 587                                             the_netmap) == 0)
 588                         {
 589                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 590
 591                                 /* serialize the message */
 592                                 CtdlSerializeMessage(&sermsg, msg);
 593
 594                                 /* now send it */
 595                                 if (StrLength(nexthop) == 0) {
 596                                         nexthop = Buf;
 597                                 }
 598                                 snprintf(filename,
 599                                          sizeof filename,
 600                                          "%s/%s@%lx%x",
 601                                          ctdl_netout_dir,
 602                                          ChrPtr(nexthop),
 603                                          time(NULL),
 604                                          rand()
 605                                 );
 606                                 syslog(LOG_DEBUG, "netspool: appending to %s", filename);
 607                                 fp = fopen(filename, "ab");
 608                                 if (fp != NULL) {
 609                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 610                                         fclose(fp);
 611                                 }
 612                                 else {
 613                                         syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 614                                 }
 615                                 free(sermsg.ser);
 616                                 CM_Free(msg);
 617                                 FreeStrBuf(&Buf);
 618                                 return;
 619                         }
 620
 621                         else {  /* invalid destination node name */
 622                                 FreeStrBuf(&Buf);
 623
 624                                 network_bounce(&msg,
 625 "A message you sent could not be delivered due to an invalid destination node"
 626 " name.  Please check the address and try sending the message again.\n");
 627                                 return;
 628
 629                         }
 630                 }
 631         }
 632
 633         /*
 634          * Check to see if we already have a copy of this message, and
 635          * abort its processing if so.  (We used to post a warning to Aide>
 636          * every time this happened, but the network is now so densely
 637          * connected that it's inevitable.)
 638          */
 639         if (network_usetable(msg) != 0) {
 640                 CM_Free(msg);
 641                 return;
 642         }
 643
 644         /* Learn network topology from the path */
 645         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 646                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 647                                      msg->cm_fields[eMessagePath],
 648                                      the_netmap,
 649                                      netmap_changed);
 650         }
 651
 652         /* Is the sending node giving us a very persuasive suggestion about
 653          * which room this message should be saved in?  If so, go with that.
 654          */
 655         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 656                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 657         }
 658
 659         /* Otherwise, does it have a recipient?  If so, validate it... */
 660         else if (!CM_IsEmpty(msg, eRecipient)) {
 661                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 662                 if (recp != NULL) if (recp->num_error != 0) {
 663                         network_bounce(&msg,
 664                                 "A message you sent could not be delivered due to an invalid address.\n"
 665                                 "Please check the address and try sending the message again.\n");
 666                         free_recipients(recp);
 667                         syslog(LOG_DEBUG, "netspool: bouncing message due to invalid recipient address.");
 668                         return;
 669                 }
 670                 strcpy(target_room, "");        /* no target room if mail */
 671         }
 672
 673         /* Our last shot at finding a home for this message is to see if
 674          * it has the eOriginalRoom (O) field (Originating room) set.
 675          */
 676         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 677                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 678         }
 679
 680         /* Strip out fields that are only relevant during transit */
 681         CM_FlushField(msg, eDestination);
 682         CM_FlushField(msg, eRemoteRoom);
 683
 684         /* save the message into a room */
 685         if (PerformNetprocHooks(msg, target_room) == 0) {
 686                 msg->cm_flags = CM_SKIP_HOOKS;
 687                 CtdlSubmitMsg(msg, recp, target_room, 0);
 688         }
 689         CM_Free(msg);
 690         free_recipients(recp);
 691 }
 692
 693
 694 /*
 695  * Process a single message from a single file from the inbound queue
 696  */
 697 void network_process_message(FILE *fp,
 698                              long msgstart,
 699                              long msgend,
 700                              HashList *working_ignetcfg,
 701                              HashList *the_netmap,
 702                              int *netmap_changed)
 703 {
 704         long hold_pos;
 705         long size;
 706         char *buffer;
 707
 708         hold_pos = ftell(fp);
 709         size = msgend - msgstart + 1;
 710         buffer = malloc(size);
 711         if (buffer != NULL) {
 712                 fseek(fp, msgstart, SEEK_SET);
 713                 if (fread(buffer, size, 1, fp) > 0) {
 714                         network_process_buffer(buffer,
 715                                                size,
 716                                                working_ignetcfg,
 717                                                the_netmap,
 718                                                netmap_changed);
 719                 }
 720                 free(buffer);
 721         }
 722
 723         fseek(fp, hold_pos, SEEK_SET);
 724 }
 725
 726
 727 /*
 728  * Process a single file from the inbound queue
 729  */
 730 void network_process_file(char *filename,
 731                           HashList *working_ignetcfg,
 732                           HashList *the_netmap,
 733                           int *netmap_changed)
 734 {
 735         FILE *fp;
 736         long msgstart = (-1L);
 737         long msgend = (-1L);
 738         long msgcur = 0L;
 739         int ch;
 740         int nMessages = 0;
 741
 742         fp = fopen(filename, "rb");
 743         if (fp == NULL) {
 744                 syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 745                 return;
 746         }
 747
 748         fseek(fp, 0L, SEEK_END);
 749         syslog(LOG_INFO, "netspool: processing %ld bytes from %s", ftell(fp), filename);
 750         rewind(fp);
 751
 752         /* Look for messages in the data stream and break them out */
 753         while (ch = getc(fp), ch >= 0) {
 754
 755                 if (ch == 255) {
 756                         if (msgstart >= 0L) {
 757                                 msgend = msgcur - 1;
 758                                 network_process_message(fp,
 759                                                         msgstart,
 760                                                         msgend,
 761                                                         working_ignetcfg,
 762                                                         the_netmap,
 763                                                         netmap_changed);
 764                         }
 765                         msgstart = msgcur;
 766                 }
 767
 768                 ++msgcur;
 769                 nMessages ++;
 770         }
 771
 772         msgend = msgcur - 1;
 773         if (msgstart >= 0L) {
 774                 network_process_message(fp,
 775                                         msgstart,
 776                                         msgend,
 777                                         working_ignetcfg,
 778                                         the_netmap,
 779                                         netmap_changed);
 780                 nMessages ++;
 781         }
 782
 783         if (nMessages > 0)
 784                 syslog(LOG_INFO, "netspool: processed %d messages in %s", nMessages, filename);
 785
 786         fclose(fp);
 787         unlink(filename);
 788 }
 789
 790
 791 /*
 792  * Process anything in the inbound queue
 793  */
 794 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 795 {
 796         DIR *dp;
 797         struct dirent *d;
 798         struct dirent *filedir_entry;
 799         struct stat statbuf;
 800         char filename[PATH_MAX];
 801         static time_t last_spoolin_mtime = 0L;
 802         int d_type = 0;
 803         int d_namelen;
 804
 805         /*
 806          * Check the spoolin directory's modification time.  If it hasn't
 807          * been touched, we don't need to scan it.
 808          */
 809         if (stat(ctdl_netin_dir, &statbuf)) return;
 810         if (statbuf.st_mtime == last_spoolin_mtime) {
 811                 syslog(LOG_DEBUG, "netspool: nothing in inbound queue");
 812                 return;
 813         }
 814         last_spoolin_mtime = statbuf.st_mtime;
 815         syslog(LOG_DEBUG, "netspool: processing inbound queue");
 816
 817         /*
 818          * Ok, there's something interesting in there, so scan it.
 819          */
 820         dp = opendir(ctdl_netin_dir);
 821         if (dp == NULL) return;
 822
 823         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 824         if (d == NULL) {
 825                 closedir(dp);
 826                 return;
 827         }
 828
 829         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 830                (filedir_entry != NULL))
 831         {
 832 #ifdef _DIRENT_HAVE_D_NAMLEN
 833                 d_namelen = filedir_entry->d_namlen;
 834
 835 #else
 836                 d_namelen = strlen(filedir_entry->d_name);
 837 #endif
 838
 839 #ifdef _DIRENT_HAVE_D_TYPE
 840                 d_type = filedir_entry->d_type;
 841 #else
 842                 d_type = DT_UNKNOWN;
 843 #endif
 844                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 845                         continue; /* Ignore backup files... */
 846
 847                 if ((d_namelen == 1) &&
 848                     (filedir_entry->d_name[0] == '.'))
 849                         continue;
 850
 851                 if ((d_namelen == 2) &&
 852                     (filedir_entry->d_name[0] == '.') &&
 853                     (filedir_entry->d_name[1] == '.'))
 854                         continue;
 855
 856                 if (d_type == DT_UNKNOWN) {
 857                         struct stat s;
 858                         char path[PATH_MAX];
 859
 860                         snprintf(path,
 861                                  PATH_MAX,
 862                                  "%s/%s",
 863                                  ctdl_netin_dir,
 864                                  filedir_entry->d_name);
 865
 866                         if (lstat(path, &s) == 0) {
 867                                 d_type = IFTODT(s.st_mode);
 868                         }
 869                 }
 870
 871                 switch (d_type)
 872                 {
 873                 case DT_DIR:
 874                         break;
 875                 case DT_LNK: /* TODO: check whether its a file or a directory */
 876                 case DT_REG:
 877                         snprintf(filename,
 878                                 sizeof filename,
 879                                 "%s/%s",
 880                                 ctdl_netin_dir,
 881                                 d->d_name
 882                         );
 883                         network_process_file(filename,
 884                                              working_ignetcfg,
 885                                              the_netmap,
 886                                              netmap_changed);
 887                 }
 888         }
 889
 890         closedir(dp);
 891         free(d);
 892 }
 893
 894 /*
 895  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 896  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 897  */
 898 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 899 {
 900         IOBuffer IOB;
 901         FDIOBuffer FDIO;
 902         int d_namelen;
 903         DIR *dp;
 904         struct dirent *d;
 905         struct dirent *filedir_entry;
 906         const char *pch;
 907         char spooloutfilename[PATH_MAX];
 908         char filename[PATH_MAX];
 909         const StrBuf *nexthop;
 910         StrBuf *NextHop;
 911         int i;
 912         struct stat statbuf;
 913         int nFailed = 0;
 914         int d_type = 0;
 915
 916         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 917         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 918         if (d == NULL)  return;
 919
 920         dp = opendir(ctdl_netout_dir);
 921         if (dp == NULL) {
 922                 free(d);
 923                 return;
 924         }
 925
 926         NextHop = NewStrBuf();
 927         memset(&IOB, 0, sizeof(IOBuffer));
 928         memset(&FDIO, 0, sizeof(FDIOBuffer));
 929         FDIO.IOB = &IOB;
 930
 931         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 932                (filedir_entry != NULL))
 933         {
 934 #ifdef _DIRENT_HAVE_D_NAMLEN
 935                 d_namelen = filedir_entry->d_namlen;
 936
 937 #else
 938                 d_namelen = strlen(filedir_entry->d_name);
 939 #endif
 940
 941 #ifdef _DIRENT_HAVE_D_TYPE
 942                 d_type = filedir_entry->d_type;
 943 #else
 944                 d_type = DT_UNKNOWN;
 945 #endif
 946                 if (d_type == DT_DIR)
 947                         continue;
 948
 949                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 950                         continue; /* Ignore backup files... */
 951
 952                 if ((d_namelen == 1) &&
 953                     (filedir_entry->d_name[0] == '.'))
 954                         continue;
 955
 956                 if ((d_namelen == 2) &&
 957                     (filedir_entry->d_name[0] == '.') &&
 958                     (filedir_entry->d_name[1] == '.'))
 959                         continue;
 960
 961                 pch = strchr(filedir_entry->d_name, '@');
 962                 if (pch == NULL)
 963                         continue;
 964
 965                 snprintf(filename,
 966                          sizeof filename,
 967                          "%s/%s",
 968                          ctdl_netout_dir,
 969                          filedir_entry->d_name);
 970
 971                 StrBufPlain(NextHop,
 972                             filedir_entry->d_name,
 973                             pch - filedir_entry->d_name);
 974
 975                 snprintf(spooloutfilename,
 976                          sizeof spooloutfilename,
 977                          "%s/%s",
 978                          ctdl_netout_dir,
 979                          ChrPtr(NextHop));
 980
 981                 syslog(LOG_DEBUG, "netspool: consolidate %s to %s", filename, ChrPtr(NextHop));
 982                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
 983                         nFailed++;
 984                         syslog(LOG_DEBUG, "netspool: currently online with %s - skipping for now", ChrPtr(NextHop));
 985                 }
 986                 else {
 987                         size_t dsize;
 988                         size_t fsize;
 989                         int infd, outfd;
 990                         const char *err = NULL;
 991                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
 992
 993                         infd = open(filename, O_RDONLY);
 994                         if (infd == -1) {
 995                                 nFailed++;
 996                                 syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 997                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
 998                                 continue;
 999                         }
1000
1001                         outfd = open(spooloutfilename,
1002                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1003                                   S_IRUSR|S_IWUSR);
1004                         if (outfd == -1)
1005                         {
1006                                 outfd = open(spooloutfilename,
1007                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1008                                              S_IRUSR | S_IWUSR);
1009                         }
1010                         if (outfd == -1) {
1011                                 nFailed++;
1012                                 syslog(LOG_ERR, "%s: %s", spooloutfilename, strerror(errno));
1013                                 close(infd);
1014                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1015                                 continue;
1016                         }
1017
1018                         dsize = lseek(outfd, 0, SEEK_END);
1019                         lseek(outfd, -dsize, SEEK_SET);
1020
1021                         fstat(infd, &statbuf);
1022                         fsize = statbuf.st_size;
1023                         IOB.fd = infd;
1024                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1025                         FDIO.ChunkSendRemain = fsize;
1026                         FDIO.TotalSentAlready = dsize;
1027                         err = NULL;
1028                         errno = 0;
1029                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1030                         if (err == NULL) {
1031                                 unlink(filename);
1032                                 syslog(LOG_DEBUG, "netspool: spoolfile %s now "SIZE_T_FMT" KB", spooloutfilename, (dsize + fsize)/1024);
1033                         }
1034                         else {
1035                                 nFailed++;
1036                                 syslog(LOG_ERR, "netspool: failed to append to %s [%s]; rolling back..", spooloutfilename, strerror(errno));
1037                                 /* whoops partial append?? truncate spooloutfilename again! */
1038                                 ftruncate(outfd, dsize);
1039                         }
1040                         FDIOBufferDelete(&FDIO);
1041                         close(infd);
1042                         close(outfd);
1043                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1044                 }
1045         }
1046         closedir(dp);
1047
1048         if (nFailed > 0) {
1049                 FreeStrBuf(&NextHop);
1050                 syslog(LOG_INFO, "netspool: skipping Spoolcleanup because of %d files unprocessed.", nFailed);
1051
1052                 return;
1053         }
1054
1055         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1056         dp = opendir(ctdl_netout_dir);
1057         if (dp == NULL) {
1058                 FreeStrBuf(&NextHop);
1059                 free(d);
1060                 return;
1061         }
1062
1063         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1064                (filedir_entry != NULL))
1065         {
1066 #ifdef _DIRENT_HAVE_D_NAMLEN
1067                 d_namelen = filedir_entry->d_namlen;
1068
1069 #else
1070                 d_namelen = strlen(filedir_entry->d_name);
1071 #endif
1072
1073 #ifdef _DIRENT_HAVE_D_TYPE
1074                 d_type = filedir_entry->d_type;
1075 #else
1076                 d_type = DT_UNKNOWN;
1077 #endif
1078                 if (d_type == DT_DIR)
1079                         continue;
1080
1081                 if ((d_namelen == 1) &&
1082                     (filedir_entry->d_name[0] == '.'))
1083                         continue;
1084
1085                 if ((d_namelen == 2) &&
1086                     (filedir_entry->d_name[0] == '.') &&
1087                     (filedir_entry->d_name[1] == '.'))
1088                         continue;
1089
1090                 pch = strchr(filedir_entry->d_name, '@');
1091                 if (pch == NULL) /* no @ in name? consolidated file. */
1092                         continue;
1093
1094                 StrBufPlain(NextHop,
1095                             filedir_entry->d_name,
1096                             pch - filedir_entry->d_name);
1097
1098                 snprintf(filename,
1099                         sizeof filename,
1100                         "%s/%s",
1101                         ctdl_netout_dir,
1102                         filedir_entry->d_name
1103                 );
1104
1105                 i = CtdlIsValidNode(&nexthop,
1106                                     NULL,
1107                                     NextHop,
1108                                     working_ignetcfg,
1109                                     the_netmap);
1110
1111                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1112                         unlink(filename);
1113                 }
1114         }
1115         FreeStrBuf(&NextHop);
1116         free(d);
1117         closedir(dp);
1118 }
1119
1120 void free_spoolcontrol_struct(SpoolControl **sc)
1121 {
1122         free_spoolcontrol_struct_members(*sc);
1123         free(*sc);
1124         *sc = NULL;
1125 }
1126
1127 void free_spoolcontrol_struct_members(SpoolControl *sc)
1128 {
1129         int i;
1130         FreeStrBuf(&sc->RoomInfo);
1131         FreeStrBuf(&sc->ListID);
1132         for (i = 0; i < maxRoomNetCfg; i++)
1133                 FreeStrBuf(&sc->Users[i]);
1134 }
1135
1136
1137 /*
1138  * It's ok if these directories already exist.  Just fail silently.
1139  */
1140 void create_spool_dirs(void) {
1141         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1142                 syslog(LOG_EMERG, "netspool: unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1143         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1144                 syslog(LOG_EMERG, "netspool: unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1145         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1146                 syslog(LOG_EMERG, "netspool: unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1147         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1148                 syslog(LOG_EMERG, "netspool: unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1149         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1150                 syslog(LOG_EMERG, "netspool: unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1151         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1152                 syslog(LOG_EMERG, "netspool: unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1153         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1154                 syslog(LOG_EMERG, "netspool: unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1155         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1156                 syslog(LOG_EMERG, "netspool: unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1157 }
1158
1159 /*
1160  * Module entry point
1161  */
1162 CTDL_MODULE_INIT(network_spool)
1163 {
1164         if (!threading)
1165         {
1166                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1167                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1168                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1169                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1170                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1171                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1172                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1173                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1174
1175                 create_spool_dirs();
1176 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1177         }
1178         return "network_spool";
1179 }