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) 2000-2015 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 <libcitadel.h>
  64 #include "citadel.h"
  65 #include "server.h"
  66 #include "citserver.h"
  67 #include "support.h"
  68 #include "config.h"
  69 #include "user_ops.h"
  70 #include "database.h"
  71 #include "msgbase.h"
  72 #include "internet_addressing.h"
  73 #include "serv_network.h"
  74 #include "clientsocket.h"
  75 #include "citadel_dirs.h"
  76 #include "threads.h"
  77 #include "context.h"
  78
  79 #include "ctdl_module.h"
  80
  81 #include "netspool.h"
  82 #include "netmail.h"
  83
  84
  85 #ifndef DT_UNKNOWN
  86 #define DT_UNKNOWN     0
  87 #define DT_DIR         4
  88 #define DT_REG         8
  89 #define DT_LNK         10
  90
  91 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
  92 #define DTTOIF(dirtype)        ((dirtype) << 12)
  93 #endif
  94
  95
  96 /*
  97  * Bounce a message back to the sender
  98  */
  99 void network_bounce(struct CtdlMessage **pMsg, char *reason)
 100 {
 101         struct CitContext *CCC = CC;
 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         QNM_syslog(LOG_DEBUG, "entering network_bounce()\n");
 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         QNM_syslog(LOG_DEBUG, "leaving network_bounce()\n");
 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         struct CitContext *CCC = CC;
 268         SpoolControl *sc;
 269         int i = 0;
 270
 271         sc = (SpoolControl*)malloc(sizeof(SpoolControl));
 272         memset(sc, 0, sizeof(SpoolControl));
 273         sc->RNCfg = room_to_spool->OneRNCfg;
 274         sc->lastsent = room_to_spool->lastsent;
 275         sc->working_ignetcfg = working_ignetcfg;
 276         sc->the_netmap = the_netmap;
 277
 278         /*
 279          * If the room doesn't exist, don't try to perform its networking tasks.
 280          * Normally this should never happen, but once in a while maybe a room gets
 281          * queued for networking and then deleted before it can happen.
 282          */
 283         if (CtdlGetRoom(&sc->room, room_to_spool->name) != 0) {
 284                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 285                 free(sc);
 286                 return;
 287         }
 288         if (sc->room.QRhighest <= sc->lastsent)
 289         {
 290                 QN_syslog(LOG_DEBUG, "nothing to do for <%s>\n", room_to_spool->name);
 291                 free(sc);
 292                 return;
 293         }
 294
 295         begin_critical_section(S_NETCONFIGS);
 296         if (sc->RNCfg == NULL)
 297                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 298
 299         if (!HaveSpoolConfig(sc->RNCfg))
 300         {
 301                 end_critical_section(S_NETCONFIGS);
 302                 free(sc);
 303                 /* nothing to do for this room... */
 304                 return;
 305         }
 306
 307         /* Now lets remember whats needed for the actual work... */
 308
 309         for (i=0; i < 4; i++)
 310         {
 311                 aggregate_recipients(&sc->Users[SpoolCfgs[i]],
 312                                      SpoolCfgs[i],
 313                                      sc->RNCfg,
 314                                      SpoolCfgsCopyN[i]);
 315         }
 316
 317         if (StrLength(sc->RNCfg->Sender) > 0)
 318                 sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
 319         end_critical_section(S_NETCONFIGS);
 320
 321         sc->next = *pSC;
 322         *pSC = sc;
 323
 324 }
 325
 326 void CalcListID(SpoolControl *sc)
 327 {
 328         StrBuf *RoomName;
 329         const char *err;
 330         int fd;
 331         struct CitContext *CCC = CC;
 332         char filename[PATH_MAX];
 333 #define MAX_LISTIDLENGTH 150
 334
 335         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 336         fd = open(filename, 0);
 337
 338         if (fd > 0) {
 339                 struct stat stbuf;
 340
 341                 if ((fstat(fd, &stbuf) == 0) &&
 342                     (stbuf.st_size > 0))
 343                 {
 344                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 345                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 346                 }
 347                 close(fd);
 348         }
 349
 350         sc->ListID = NewStrBufPlain(NULL, 1024);
 351         if (StrLength(sc->RoomInfo) > 0)
 352         {
 353                 const char *Pos = NULL;
 354                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 355
 356                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 357                 {
 358                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 359                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 360                 }
 361                 StrBufAsciify(sc->ListID, ' ');
 362         }
 363         else
 364         {
 365                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 366         }
 367
 368         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 369         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 370         StrBufAsciify(RoomName, '_');
 371         StrBufReplaceChars(RoomName, ' ', '_');
 372
 373         if (StrLength(sc->Users[roommailalias]) > 0)
 374         {
 375                 long Pos;
 376                 const char *AtPos;
 377
 378                 Pos = StrLength(sc->ListID);
 379                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 380                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 381
 382                 if (AtPos != NULL)
 383                 {
 384                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 385                 }
 386         }
 387         else
 388         {
 389                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 390                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 391                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 392                 StrBufAppendBufPlain(sc->ListID, CtdlGetConfigStr("c_fqdn"), -1, 0);
 393                 /*
 394                  * this used to be:
 395                  * roomname <Room-Number.list-id.fqdn>
 396                  * according to rfc2919.txt it only has to be a uniq identifier
 397                  * under the domain of the system;
 398                  * in general MUAs use it to calculate the reply address nowadays.
 399                  */
 400         }
 401         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 402
 403         if (StrLength(sc->Users[roommailalias]) == 0)
 404         {
 405                 sc->Users[roommailalias] = NewStrBuf();
 406
 407                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 408                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 409                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 410                 StrBufAppendBufPlain(sc->Users[roommailalias], CtdlGetConfigStr("c_fqdn"), -1, 0);
 411
 412                 StrBufLowerCase(sc->Users[roommailalias]);
 413         }
 414
 415         FreeStrBuf(&RoomName);
 416 }
 417
 418 static time_t last_digest_delivery = 0;
 419
 420 /*
 421  * Batch up and send all outbound traffic from the current room
 422  */
 423 void network_spoolout_room(SpoolControl *sc)
 424 {
 425         struct CitContext *CCC = CC;
 426         char buf[SIZ];
 427         int i;
 428         long lastsent;
 429
 430         /*
 431          * If the room doesn't exist, don't try to perform its networking tasks.
 432          * Normally this should never happen, but once in a while maybe a room gets
 433          * queued for networking and then deleted before it can happen.
 434          */
 435         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 436
 437         syslog(LOG_INFO, "Networking started for <%s>\n", CCC->room.QRname);
 438
 439         CalcListID(sc);
 440
 441         /* remember where we started... */
 442         lastsent = sc->lastsent;
 443
 444         /* Fetch the messages we ought to send & prepare them. */
 445         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 446                 network_spool_msg, sc);
 447
 448         if (StrLength(sc->Users[roommailalias]) > 0)
 449         {
 450                 long len;
 451                 len = StrLength(sc->Users[roommailalias]);
 452                 if (len + 1 > sizeof(buf))
 453                         len = sizeof(buf) - 1;
 454                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 455                 buf[len] = '\0';
 456         }
 457         else
 458         {
 459                 snprintf(buf, sizeof buf, "room_%s@%s",
 460                          CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
 461         }
 462
 463         for (i=0; buf[i]; ++i) {
 464                 buf[i] = tolower(buf[i]);
 465                 if (isspace(buf[i])) buf[i] = '_';
 466         }
 467
 468
 469         /* If we wrote a digest, deliver it and then close it */
 470         if (sc->Users[digestrecp] != NULL) {
 471                 time_t now = time(NULL);
 472                 time_t secs_today = now % (24 * 60 * 60);
 473                 long delta = 0;
 474
 475                 if (last_digest_delivery != 0) {
 476                         delta = now - last_digest_delivery;
 477                         delta = (24 * 60 * 60) - delta;
 478                 }
 479
 480                 if ((secs_today < 300) &&
 481                     (delta < 300))
 482                 {
 483                         if (sc->digestfp == NULL) {
 484                                 sc->digestfp = create_digest_file(&sc->room, 0);
 485                         }
 486                         if (sc->digestfp != NULL) {
 487                                 last_digest_delivery = now;
 488                                 fprintf(sc->digestfp,
 489                                         " -----------------------------------"
 490                                         "------------------------------------"
 491                                         "-------\n"
 492                                         "You are subscribed to the '%s' "
 493                                         "list.\n"
 494                                         "To post to the list: %s\n",
 495                                         CCC->room.QRname, buf
 496                                         );
 497                                 network_deliver_digest(sc);     /* deliver */
 498                                 remove_digest_file(&sc->room);
 499                         }
 500                 }
 501         }
 502         if (sc->digestfp != NULL) {
 503                 fclose(sc->digestfp);
 504                 sc->digestfp = NULL;
 505         }
 506
 507         /* Now rewrite the config file */
 508         if (sc->lastsent != lastsent)
 509         {
 510                 begin_critical_section(S_NETCONFIGS);
 511                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 512
 513                 sc->RNCfg->lastsent = sc->lastsent;
 514                 sc->RNCfg->changed = 1;
 515                 end_critical_section(S_NETCONFIGS);
 516         }
 517 }
 518
 519
 520 /*
 521  * Check the use table.  This is a list of messages which have recently
 522  * arrived on the system.  It is maintained and queried to prevent the same
 523  * message from being entered into the database multiple times if it happens
 524  * to arrive multiple times by accident.
 525  */
 526 int network_usetable(struct CtdlMessage *msg)
 527 {
 528         StrBuf *msgid;
 529         struct CitContext *CCC = CC;
 530         time_t now;
 531
 532         /* Bail out if we can't generate a message ID */
 533         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 534         {
 535                 return(0);
 536         }
 537
 538         /* Generate the message ID */
 539         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 540         if (haschar(ChrPtr(msgid), '@') == 0) {
 541                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 542                 if (!CM_IsEmpty(msg, eNodeName)) {
 543                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 544                 }
 545                 else {
 546                         FreeStrBuf(&msgid);
 547                         return(0);
 548                 }
 549         }
 550         now = time(NULL);
 551         if (CheckIfAlreadySeen("Networker Import",
 552                                msgid,
 553                                now, 0,
 554                                eUpdate,
 555                                CCC->cs_pid, 0) != 0)
 556         {
 557                 FreeStrBuf(&msgid);
 558                 return(1);
 559         }
 560         FreeStrBuf(&msgid);
 561
 562         return(0);
 563 }
 564
 565
 566 /*
 567  * Process a buffer containing a single message from a single file
 568  * from the inbound queue
 569  */
 570 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 571 {
 572         long len;
 573         struct CitContext *CCC = CC;
 574         StrBuf *Buf = NULL;
 575         struct CtdlMessage *msg = NULL;
 576         long pos;
 577         int field;
 578         recptypes *recp = NULL;
 579         char target_room[ROOMNAMELEN];
 580         struct ser_ret sermsg;
 581         char filename[PATH_MAX];
 582         FILE *fp;
 583         const StrBuf *nexthop = NULL;
 584         unsigned char firstbyte;
 585         unsigned char lastbyte;
 586
 587         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 588
 589         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 590         firstbyte = buffer[0];
 591         lastbyte = buffer[size-1];
 592         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 593                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 594                           size, firstbyte, lastbyte);
 595                 return;
 596         }
 597
 598         /* Set default target room to trash */
 599         strcpy(target_room, TWITROOM);
 600
 601         /* Load the message into memory */
 602         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 603         memset(msg, 0, sizeof(struct CtdlMessage));
 604         msg->cm_magic = CTDLMESSAGE_MAGIC;
 605         msg->cm_anon_type = buffer[1];
 606         msg->cm_format_type = buffer[2];
 607
 608         for (pos = 3; pos < size; ++pos) {
 609                 field = buffer[pos];
 610                 len = strlen(buffer + pos + 1);
 611                 CM_SetField(msg, field, buffer + pos + 1, len);
 612                 pos = pos + len + 1;
 613         }
 614
 615         /* Check for message routing */
 616         if (!CM_IsEmpty(msg, eDestination)) {
 617                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 618
 619                         /* route the message */
 620                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 621                         if (CtdlIsValidNode(&nexthop,
 622                                             NULL,
 623                                             Buf,
 624                                             working_ignetcfg,
 625                                             the_netmap) == 0)
 626                         {
 627                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 628
 629                                 /* serialize the message */
 630                                 CtdlSerializeMessage(&sermsg, msg);
 631
 632                                 /* now send it */
 633                                 if (StrLength(nexthop) == 0) {
 634                                         nexthop = Buf;
 635                                 }
 636                                 snprintf(filename,
 637                                          sizeof filename,
 638                                          "%s/%s@%lx%x",
 639                                          ctdl_netout_dir,
 640                                          ChrPtr(nexthop),
 641                                          time(NULL),
 642                                          rand()
 643                                 );
 644                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 645                                 fp = fopen(filename, "ab");
 646                                 if (fp != NULL) {
 647                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 648                                         fclose(fp);
 649                                 }
 650                                 else {
 651                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 652                                 }
 653                                 free(sermsg.ser);
 654                                 CM_Free(msg);
 655                                 FreeStrBuf(&Buf);
 656                                 return;
 657                         }
 658
 659                         else {  /* invalid destination node name */
 660                                 FreeStrBuf(&Buf);
 661
 662                                 network_bounce(&msg,
 663 "A message you sent could not be delivered due to an invalid destination node"
 664 " name.  Please check the address and try sending the message again.\n");
 665                                 return;
 666
 667                         }
 668                 }
 669         }
 670
 671         /*
 672          * Check to see if we already have a copy of this message, and
 673          * abort its processing if so.  (We used to post a warning to Aide>
 674          * every time this happened, but the network is now so densely
 675          * connected that it's inevitable.)
 676          */
 677         if (network_usetable(msg) != 0) {
 678                 CM_Free(msg);
 679                 return;
 680         }
 681
 682         /* Learn network topology from the path */
 683         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 684                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 685                                      msg->cm_fields[eMessagePath],
 686                                      the_netmap,
 687                                      netmap_changed);
 688         }
 689
 690         /* Is the sending node giving us a very persuasive suggestion about
 691          * which room this message should be saved in?  If so, go with that.
 692          */
 693         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 694                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 695         }
 696
 697         /* Otherwise, does it have a recipient?  If so, validate it... */
 698         else if (!CM_IsEmpty(msg, eRecipient)) {
 699                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 700                 if (recp != NULL) if (recp->num_error != 0) {
 701                         network_bounce(&msg,
 702                                 "A message you sent could not be delivered due to an invalid address.\n"
 703                                 "Please check the address and try sending the message again.\n");
 704                         free_recipients(recp);
 705                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 706                         return;
 707                 }
 708                 strcpy(target_room, "");        /* no target room if mail */
 709         }
 710
 711         /* Our last shot at finding a home for this message is to see if
 712          * it has the eOriginalRoom (O) field (Originating room) set.
 713          */
 714         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 715                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 716         }
 717
 718         /* Strip out fields that are only relevant during transit */
 719         CM_FlushField(msg, eDestination);
 720         CM_FlushField(msg, eRemoteRoom);
 721
 722         /* save the message into a room */
 723         if (PerformNetprocHooks(msg, target_room) == 0) {
 724                 msg->cm_flags = CM_SKIP_HOOKS;
 725                 CtdlSubmitMsg(msg, recp, target_room, 0);
 726         }
 727         CM_Free(msg);
 728         free_recipients(recp);
 729 }
 730
 731
 732 /*
 733  * Process a single message from a single file from the inbound queue
 734  */
 735 void network_process_message(FILE *fp,
 736                              long msgstart,
 737                              long msgend,
 738                              HashList *working_ignetcfg,
 739                              HashList *the_netmap,
 740                              int *netmap_changed)
 741 {
 742         long hold_pos;
 743         long size;
 744         char *buffer;
 745
 746         hold_pos = ftell(fp);
 747         size = msgend - msgstart + 1;
 748         buffer = malloc(size);
 749         if (buffer != NULL) {
 750                 fseek(fp, msgstart, SEEK_SET);
 751                 if (fread(buffer, size, 1, fp) > 0) {
 752                         network_process_buffer(buffer,
 753                                                size,
 754                                                working_ignetcfg,
 755                                                the_netmap,
 756                                                netmap_changed);
 757                 }
 758                 free(buffer);
 759         }
 760
 761         fseek(fp, hold_pos, SEEK_SET);
 762 }
 763
 764
 765 /*
 766  * Process a single file from the inbound queue
 767  */
 768 void network_process_file(char *filename,
 769                           HashList *working_ignetcfg,
 770                           HashList *the_netmap,
 771                           int *netmap_changed)
 772 {
 773         struct CitContext *CCC = CC;
 774         FILE *fp;
 775         long msgstart = (-1L);
 776         long msgend = (-1L);
 777         long msgcur = 0L;
 778         int ch;
 779         int nMessages = 0;
 780
 781         fp = fopen(filename, "rb");
 782         if (fp == NULL) {
 783                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 784                 return;
 785         }
 786
 787         fseek(fp, 0L, SEEK_END);
 788         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 789         rewind(fp);
 790
 791         /* Look for messages in the data stream and break them out */
 792         while (ch = getc(fp), ch >= 0) {
 793
 794                 if (ch == 255) {
 795                         if (msgstart >= 0L) {
 796                                 msgend = msgcur - 1;
 797                                 network_process_message(fp,
 798                                                         msgstart,
 799                                                         msgend,
 800                                                         working_ignetcfg,
 801                                                         the_netmap,
 802                                                         netmap_changed);
 803                         }
 804                         msgstart = msgcur;
 805                 }
 806
 807                 ++msgcur;
 808                 nMessages ++;
 809         }
 810
 811         msgend = msgcur - 1;
 812         if (msgstart >= 0L) {
 813                 network_process_message(fp,
 814                                         msgstart,
 815                                         msgend,
 816                                         working_ignetcfg,
 817                                         the_netmap,
 818                                         netmap_changed);
 819                 nMessages ++;
 820         }
 821
 822         if (nMessages > 0)
 823                 QN_syslog(LOG_INFO,
 824                           "network: processed %d messages in %s\n",
 825                           nMessages,
 826                           filename);
 827
 828         fclose(fp);
 829         unlink(filename);
 830 }
 831
 832
 833 /*
 834  * Process anything in the inbound queue
 835  */
 836 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 837 {
 838         struct CitContext *CCC = CC;
 839         DIR *dp;
 840         struct dirent *d;
 841         struct dirent *filedir_entry;
 842         struct stat statbuf;
 843         char filename[PATH_MAX];
 844         static time_t last_spoolin_mtime = 0L;
 845         int d_type = 0;
 846         int d_namelen;
 847
 848         /*
 849          * Check the spoolin directory's modification time.  If it hasn't
 850          * been touched, we don't need to scan it.
 851          */
 852         if (stat(ctdl_netin_dir, &statbuf)) return;
 853         if (statbuf.st_mtime == last_spoolin_mtime) {
 854                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 855                 return;
 856         }
 857         last_spoolin_mtime = statbuf.st_mtime;
 858         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 859
 860         /*
 861          * Ok, there's something interesting in there, so scan it.
 862          */
 863         dp = opendir(ctdl_netin_dir);
 864         if (dp == NULL) return;
 865
 866         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 867         if (d == NULL) {
 868                 closedir(dp);
 869                 return;
 870         }
 871
 872         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 873                (filedir_entry != NULL))
 874         {
 875 #ifdef _DIRENT_HAVE_D_NAMLEN
 876                 d_namelen = filedir_entry->d_namlen;
 877
 878 #else
 879                 d_namelen = strlen(filedir_entry->d_name);
 880 #endif
 881
 882 #ifdef _DIRENT_HAVE_D_TYPE
 883                 d_type = filedir_entry->d_type;
 884 #else
 885                 d_type = DT_UNKNOWN;
 886 #endif
 887                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 888                         continue; /* Ignore backup files... */
 889
 890                 if ((d_namelen == 1) &&
 891                     (filedir_entry->d_name[0] == '.'))
 892                         continue;
 893
 894                 if ((d_namelen == 2) &&
 895                     (filedir_entry->d_name[0] == '.') &&
 896                     (filedir_entry->d_name[1] == '.'))
 897                         continue;
 898
 899                 if (d_type == DT_UNKNOWN) {
 900                         struct stat s;
 901                         char path[PATH_MAX];
 902
 903                         snprintf(path,
 904                                  PATH_MAX,
 905                                  "%s/%s",
 906                                  ctdl_netin_dir,
 907                                  filedir_entry->d_name);
 908
 909                         if (lstat(path, &s) == 0) {
 910                                 d_type = IFTODT(s.st_mode);
 911                         }
 912                 }
 913
 914                 switch (d_type)
 915                 {
 916                 case DT_DIR:
 917                         break;
 918                 case DT_LNK: /* TODO: check whether its a file or a directory */
 919                 case DT_REG:
 920                         snprintf(filename,
 921                                 sizeof filename,
 922                                 "%s/%s",
 923                                 ctdl_netin_dir,
 924                                 d->d_name
 925                         );
 926                         network_process_file(filename,
 927                                              working_ignetcfg,
 928                                              the_netmap,
 929                                              netmap_changed);
 930                 }
 931         }
 932
 933         closedir(dp);
 934         free(d);
 935 }
 936
 937 /*
 938  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 939  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 940  */
 941 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 942 {
 943         struct CitContext *CCC = CC;
 944         IOBuffer IOB;
 945         FDIOBuffer FDIO;
 946         int d_namelen;
 947         DIR *dp;
 948         struct dirent *d;
 949         struct dirent *filedir_entry;
 950         const char *pch;
 951         char spooloutfilename[PATH_MAX];
 952         char filename[PATH_MAX];
 953         const StrBuf *nexthop;
 954         StrBuf *NextHop;
 955         int i;
 956         struct stat statbuf;
 957         int nFailed = 0;
 958         int d_type = 0;
 959
 960
 961         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 962         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 963         if (d == NULL)  return;
 964
 965         dp = opendir(ctdl_netout_dir);
 966         if (dp == NULL) {
 967                 free(d);
 968                 return;
 969         }
 970
 971         NextHop = NewStrBuf();
 972         memset(&IOB, 0, sizeof(IOBuffer));
 973         memset(&FDIO, 0, sizeof(FDIOBuffer));
 974         FDIO.IOB = &IOB;
 975
 976         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 977                (filedir_entry != NULL))
 978         {
 979 #ifdef _DIRENT_HAVE_D_NAMLEN
 980                 d_namelen = filedir_entry->d_namlen;
 981
 982 #else
 983                 d_namelen = strlen(filedir_entry->d_name);
 984 #endif
 985
 986 #ifdef _DIRENT_HAVE_D_TYPE
 987                 d_type = filedir_entry->d_type;
 988 #else
 989                 d_type = DT_UNKNOWN;
 990 #endif
 991                 if (d_type == DT_DIR)
 992                         continue;
 993
 994                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 995                         continue; /* Ignore backup files... */
 996
 997                 if ((d_namelen == 1) &&
 998                     (filedir_entry->d_name[0] == '.'))
 999                         continue;
1000
1001                 if ((d_namelen == 2) &&
1002                     (filedir_entry->d_name[0] == '.') &&
1003                     (filedir_entry->d_name[1] == '.'))
1004                         continue;
1005
1006                 pch = strchr(filedir_entry->d_name, '@');
1007                 if (pch == NULL)
1008                         continue;
1009
1010                 snprintf(filename,
1011                          sizeof filename,
1012                          "%s/%s",
1013                          ctdl_netout_dir,
1014                          filedir_entry->d_name);
1015
1016                 StrBufPlain(NextHop,
1017                             filedir_entry->d_name,
1018                             pch - filedir_entry->d_name);
1019
1020                 snprintf(spooloutfilename,
1021                          sizeof spooloutfilename,
1022                          "%s/%s",
1023                          ctdl_netout_dir,
1024                          ChrPtr(NextHop));
1025
1026                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
1027                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
1028                         nFailed++;
1029                         QN_syslog(LOG_DEBUG,
1030                                   "Currently online with %s - skipping for now\n",
1031                                   ChrPtr(NextHop)
1032                                 );
1033                 }
1034                 else {
1035                         size_t dsize;
1036                         size_t fsize;
1037                         int infd, outfd;
1038                         const char *err = NULL;
1039                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
1040
1041                         infd = open(filename, O_RDONLY);
1042                         if (infd == -1) {
1043                                 nFailed++;
1044                                 QN_syslog(LOG_ERR,
1045                                           "failed to open %s for reading due to %s; skipping.\n",
1046                                           filename, strerror(errno)
1047                                         );
1048                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1049                                 continue;
1050                         }
1051
1052                         outfd = open(spooloutfilename,
1053                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1054                                   S_IRUSR|S_IWUSR);
1055                         if (outfd == -1)
1056                         {
1057                                 outfd = open(spooloutfilename,
1058                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1059                                              S_IRUSR | S_IWUSR);
1060                         }
1061                         if (outfd == -1) {
1062                                 nFailed++;
1063                                 QN_syslog(LOG_ERR,
1064                                           "failed to open %s for reading due to %s; skipping.\n",
1065                                           spooloutfilename, strerror(errno)
1066                                         );
1067                                 close(infd);
1068                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1069                                 continue;
1070                         }
1071
1072                         dsize = lseek(outfd, 0, SEEK_END);
1073                         lseek(outfd, -dsize, SEEK_SET);
1074
1075                         fstat(infd, &statbuf);
1076                         fsize = statbuf.st_size;
1077 /*
1078                         fsize = lseek(infd, 0, SEEK_END);
1079 */
1080                         IOB.fd = infd;
1081                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1082                         FDIO.ChunkSendRemain = fsize;
1083                         FDIO.TotalSentAlready = dsize;
1084                         err = NULL;
1085                         errno = 0;
1086                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1087                         if (err == NULL) {
1088                                 unlink(filename);
1089                                 QN_syslog(LOG_DEBUG,
1090                                           "Spoolfile %s now "SIZE_T_FMT" k\n",
1091                                           spooloutfilename,
1092                                           (dsize + fsize)/1024
1093                                         );
1094                         }
1095                         else {
1096                                 nFailed++;
1097                                 QN_syslog(LOG_ERR,
1098                                           "failed to append to %s [%s]; rolling back..\n",
1099                                           spooloutfilename, strerror(errno)
1100                                         );
1101                                 /* whoops partial append?? truncate spooloutfilename again! */
1102                                 ftruncate(outfd, dsize);
1103                         }
1104                         FDIOBufferDelete(&FDIO);
1105                         close(infd);
1106                         close(outfd);
1107                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1108                 }
1109         }
1110         closedir(dp);
1111
1112         if (nFailed > 0) {
1113                 FreeStrBuf(&NextHop);
1114                 QN_syslog(LOG_INFO,
1115                           "skipping Spoolcleanup because of %d files unprocessed.\n",
1116                           nFailed
1117                         );
1118
1119                 return;
1120         }
1121
1122         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1123         dp = opendir(ctdl_netout_dir);
1124         if (dp == NULL) {
1125                 FreeStrBuf(&NextHop);
1126                 free(d);
1127                 return;
1128         }
1129
1130         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1131                (filedir_entry != NULL))
1132         {
1133 #ifdef _DIRENT_HAVE_D_NAMLEN
1134                 d_namelen = filedir_entry->d_namlen;
1135
1136 #else
1137                 d_namelen = strlen(filedir_entry->d_name);
1138 #endif
1139
1140 #ifdef _DIRENT_HAVE_D_TYPE
1141                 d_type = filedir_entry->d_type;
1142 #else
1143                 d_type = DT_UNKNOWN;
1144 #endif
1145                 if (d_type == DT_DIR)
1146                         continue;
1147
1148                 if ((d_namelen == 1) &&
1149                     (filedir_entry->d_name[0] == '.'))
1150                         continue;
1151
1152                 if ((d_namelen == 2) &&
1153                     (filedir_entry->d_name[0] == '.') &&
1154                     (filedir_entry->d_name[1] == '.'))
1155                         continue;
1156
1157                 pch = strchr(filedir_entry->d_name, '@');
1158                 if (pch == NULL) /* no @ in name? consolidated file. */
1159                         continue;
1160
1161                 StrBufPlain(NextHop,
1162                             filedir_entry->d_name,
1163                             pch - filedir_entry->d_name);
1164
1165                 snprintf(filename,
1166                         sizeof filename,
1167                         "%s/%s",
1168                         ctdl_netout_dir,
1169                         filedir_entry->d_name
1170                 );
1171
1172                 i = CtdlIsValidNode(&nexthop,
1173                                     NULL,
1174                                     NextHop,
1175                                     working_ignetcfg,
1176                                     the_netmap);
1177
1178                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1179                         unlink(filename);
1180                 }
1181         }
1182         FreeStrBuf(&NextHop);
1183         free(d);
1184         closedir(dp);
1185 }
1186
1187 void free_spoolcontrol_struct(SpoolControl **sc)
1188 {
1189         free_spoolcontrol_struct_members(*sc);
1190         free(*sc);
1191         *sc = NULL;
1192 }
1193
1194 void free_spoolcontrol_struct_members(SpoolControl *sc)
1195 {
1196         int i;
1197         FreeStrBuf(&sc->RoomInfo);
1198         FreeStrBuf(&sc->ListID);
1199         for (i = 0; i < maxRoomNetCfg; i++)
1200                 FreeStrBuf(&sc->Users[i]);
1201 }
1202
1203
1204
1205 /*
1206  * It's ok if these directories already exist.  Just fail silently.
1207  */
1208 void create_spool_dirs(void) {
1209         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1210                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1211         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1212                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1213         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1214                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1215         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1216                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1217         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1218                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1219         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1220                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1221         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1222                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1223         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1224                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1225 }
1226
1227 /*
1228  * Module entry point
1229  */
1230 CTDL_MODULE_INIT(network_spool)
1231 {
1232         if (!threading)
1233         {
1234                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1235                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1236                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1237                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1238                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1239                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1240                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1241                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1242
1243                 create_spool_dirs();
1244 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1245         }
1246         return "network_spool";
1247 }