citadel/modules/network/serv_netspool.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2016 by the citadel.org team
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License, version 3.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  16  * This is a fairly high-level type of critical section.  It ensures that no
  17  * two threads work on the netconfigs files at the same time.  Since we do
  18  * so many things inside these, here are the rules:
  19  *  1. begin_critical_section(S_NETCONFIGS) *before* begin_ any others.
  20  *  2. Do *not* perform any I/O with the client during these sections.
  21  *
  22  */
  23
  24 /*
  25  * Duration of time (in seconds) after which pending list subscribe/unsubscribe
  26  * requests that have not been confirmed will be deleted.
  27  */
  28 #define EXP     259200  /* three days */
  29
  30 #include "sysdep.h"
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <fcntl.h>
  35 #include <ctype.h>
  36 #include <signal.h>
  37 #include <pwd.h>
  38 #include <errno.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <dirent.h>
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52 #ifdef HAVE_SYSCALL_H
  53 # include <syscall.h>
  54 #else
  55 # if HAVE_SYS_SYSCALL_H
  56 #  include <sys/syscall.h>
  57 # endif
  58 #endif
  59
  60 #include <sys/wait.h>
  61 #include <string.h>
  62 #include <limits.h>
  63 #include <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()");
 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()");
 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>", 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>", 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
 300         if (!HaveSpoolConfig(sc->RNCfg))
 301         {
 302                 end_critical_section(S_NETCONFIGS);
 303                 free(sc);
 304                 /* nothing to do for this room... */
 305                 return;
 306         }
 307
 308         /* Now lets remember whats needed for the actual work... */
 309
 310         for (i=0; i < 4; i++)
 311         {
 312                 aggregate_recipients(&sc->Users[SpoolCfgs[i]],
 313                                      SpoolCfgs[i],
 314                                      sc->RNCfg,
 315                                      SpoolCfgsCopyN[i]
 316                 );
 317         }
 318
 319         if (StrLength(sc->RNCfg->Sender) > 0) {
 320                 sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
 321         }
 322         end_critical_section(S_NETCONFIGS);
 323
 324         sc->next = *pSC;
 325         *pSC = sc;
 326
 327 }
 328
 329 void CalcListID(SpoolControl *sc)
 330 {
 331         StrBuf *RoomName;
 332         const char *err;
 333         int fd;
 334         struct CitContext *CCC = CC;
 335         char filename[PATH_MAX];
 336 #define MAX_LISTIDLENGTH 150
 337
 338         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 339         fd = open(filename, 0);
 340
 341         if (fd > 0) {
 342                 struct stat stbuf;
 343
 344                 if ((fstat(fd, &stbuf) == 0) &&
 345                     (stbuf.st_size > 0))
 346                 {
 347                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 348                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 349                 }
 350                 close(fd);
 351         }
 352
 353         sc->ListID = NewStrBufPlain(NULL, 1024);
 354         if (StrLength(sc->RoomInfo) > 0)
 355         {
 356                 const char *Pos = NULL;
 357                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 358
 359                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 360                 {
 361                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 362                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 363                 }
 364                 StrBufAsciify(sc->ListID, ' ');
 365         }
 366         else
 367         {
 368                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 369         }
 370
 371         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 372         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 373         StrBufAsciify(RoomName, '_');
 374         StrBufReplaceChars(RoomName, ' ', '_');
 375
 376         if (StrLength(sc->Users[roommailalias]) > 0)
 377         {
 378                 long Pos;
 379                 const char *AtPos;
 380
 381                 Pos = StrLength(sc->ListID);
 382                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 383                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 384
 385                 if (AtPos != NULL)
 386                 {
 387                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 388                 }
 389         }
 390         else
 391         {
 392                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 393                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 394                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 395                 StrBufAppendBufPlain(sc->ListID, CtdlGetConfigStr("c_fqdn"), -1, 0);
 396                 /*
 397                  * this used to be:
 398                  * roomname <Room-Number.list-id.fqdn>
 399                  * according to rfc2919.txt it only has to be a uniq identifier
 400                  * under the domain of the system;
 401                  * in general MUAs use it to calculate the reply address nowadays.
 402                  */
 403         }
 404         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 405
 406         if (StrLength(sc->Users[roommailalias]) == 0)
 407         {
 408                 sc->Users[roommailalias] = NewStrBuf();
 409
 410                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 411                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 412                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 413                 StrBufAppendBufPlain(sc->Users[roommailalias], CtdlGetConfigStr("c_fqdn"), -1, 0);
 414
 415                 StrBufLowerCase(sc->Users[roommailalias]);
 416         }
 417
 418         FreeStrBuf(&RoomName);
 419 }
 420
 421 static time_t last_digest_delivery = 0;
 422
 423 /*
 424  * Batch up and send all outbound traffic from the current room
 425  */
 426 void network_spoolout_room(SpoolControl *sc)
 427 {
 428         struct CitContext *CCC = CC;
 429         char buf[SIZ];
 430         int i;
 431         long lastsent;
 432
 433         /*
 434          * If the room doesn't exist, don't try to perform its networking tasks.
 435          * Normally this should never happen, but once in a while maybe a room gets
 436          * queued for networking and then deleted before it can happen.
 437          */
 438         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 439
 440         syslog(LOG_INFO, "Networking started for <%s>", CCC->room.QRname);
 441
 442         CalcListID(sc);
 443
 444         /* remember where we started... */
 445         lastsent = sc->lastsent;
 446
 447         /* Fetch the messages we ought to send & prepare them. */
 448         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 449                 network_spool_msg, sc);
 450
 451         if (StrLength(sc->Users[roommailalias]) > 0)
 452         {
 453                 long len;
 454                 len = StrLength(sc->Users[roommailalias]);
 455                 if (len + 1 > sizeof(buf))
 456                         len = sizeof(buf) - 1;
 457                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 458                 buf[len] = '\0';
 459         }
 460         else
 461         {
 462                 snprintf(buf, sizeof buf, "room_%s@%s",
 463                          CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
 464         }
 465
 466         for (i=0; buf[i]; ++i) {
 467                 buf[i] = tolower(buf[i]);
 468                 if (isspace(buf[i])) buf[i] = '_';
 469         }
 470
 471
 472         /* If we wrote a digest, deliver it and then close it */
 473         if (sc->Users[digestrecp] != NULL) {
 474                 time_t now = time(NULL);
 475                 time_t secs_today = now % (24 * 60 * 60);
 476                 long delta = 0;
 477
 478                 if (last_digest_delivery != 0) {
 479                         delta = now - last_digest_delivery;
 480                         delta = (24 * 60 * 60) - delta;
 481                 }
 482
 483                 if ((secs_today < 300) &&
 484                     (delta < 300))
 485                 {
 486                         if (sc->digestfp == NULL) {
 487                                 sc->digestfp = create_digest_file(&sc->room, 0);
 488                         }
 489                         if (sc->digestfp != NULL) {
 490                                 last_digest_delivery = now;
 491                                 fprintf(sc->digestfp,
 492                                         " -----------------------------------"
 493                                         "------------------------------------"
 494                                         "-------\n"
 495                                         "You are subscribed to the '%s' "
 496                                         "list.\n"
 497                                         "To post to the list: %s\n",
 498                                         CCC->room.QRname, buf
 499                                         );
 500                                 network_deliver_digest(sc);     /* deliver */
 501                                 remove_digest_file(&sc->room);
 502                         }
 503                 }
 504         }
 505         if (sc->digestfp != NULL) {
 506                 fclose(sc->digestfp);
 507                 sc->digestfp = NULL;
 508         }
 509
 510         /* Now rewrite the netconfig */
 511
 512         // THIS IS THE ONLY PLACE WHERE WE HAVE TO REWRITE THE NETCONFIG.
 513
 514
 515         if (sc->lastsent != lastsent)
 516         {
 517                 begin_critical_section(S_NETCONFIGS);
 518                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 519
 520                 sc->RNCfg->lastsent = sc->lastsent;
 521                 sc->RNCfg->changed = 1;
 522                 end_critical_section(S_NETCONFIGS);
 523         }
 524 }
 525
 526
 527 /*
 528  * Check the use table.  This is a list of messages which have recently
 529  * arrived on the system.  It is maintained and queried to prevent the same
 530  * message from being entered into the database multiple times if it happens
 531  * to arrive multiple times by accident.
 532  */
 533 int network_usetable(struct CtdlMessage *msg)
 534 {
 535         StrBuf *msgid;
 536         struct CitContext *CCC = CC;
 537         time_t now;
 538
 539         /* Bail out if we can't generate a message ID */
 540         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 541         {
 542                 return(0);
 543         }
 544
 545         /* Generate the message ID */
 546         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 547         if (haschar(ChrPtr(msgid), '@') == 0) {
 548                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 549                 if (!CM_IsEmpty(msg, eNodeName)) {
 550                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 551                 }
 552                 else {
 553                         FreeStrBuf(&msgid);
 554                         return(0);
 555                 }
 556         }
 557         now = time(NULL);
 558         if (CheckIfAlreadySeen("Networker Import",
 559                                msgid,
 560                                now, 0,
 561                                eUpdate,
 562                                CCC->cs_pid, 0) != 0)
 563         {
 564                 FreeStrBuf(&msgid);
 565                 return(1);
 566         }
 567         FreeStrBuf(&msgid);
 568
 569         return(0);
 570 }
 571
 572
 573 /*
 574  * Process a buffer containing a single message from a single file
 575  * from the inbound queue
 576  */
 577 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 578 {
 579         long len;
 580         struct CitContext *CCC = CC;
 581         StrBuf *Buf = NULL;
 582         struct CtdlMessage *msg = NULL;
 583         long pos;
 584         int field;
 585         recptypes *recp = NULL;
 586         char target_room[ROOMNAMELEN];
 587         struct ser_ret sermsg;
 588         char filename[PATH_MAX];
 589         FILE *fp;
 590         const StrBuf *nexthop = NULL;
 591         unsigned char firstbyte;
 592         unsigned char lastbyte;
 593
 594         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes", size);
 595
 596         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 597         firstbyte = buffer[0];
 598         lastbyte = buffer[size-1];
 599         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 600                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d", size, firstbyte, lastbyte);
 601                 return;
 602         }
 603
 604         /* Set default target room to trash */
 605         strcpy(target_room, TWITROOM);
 606
 607         /* Load the message into memory */
 608         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 609         memset(msg, 0, sizeof(struct CtdlMessage));
 610         msg->cm_magic = CTDLMESSAGE_MAGIC;
 611         msg->cm_anon_type = buffer[1];
 612         msg->cm_format_type = buffer[2];
 613
 614         for (pos = 3; pos < size; ++pos) {
 615                 field = buffer[pos];
 616                 len = strlen(buffer + pos + 1);
 617                 CM_SetField(msg, field, buffer + pos + 1, len);
 618                 pos = pos + len + 1;
 619         }
 620
 621         /* Check for message routing */
 622         if (!CM_IsEmpty(msg, eDestination)) {
 623                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 624
 625                         /* route the message */
 626                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 627                         if (CtdlIsValidNode(&nexthop,
 628                                             NULL,
 629                                             Buf,
 630                                             working_ignetcfg,
 631                                             the_netmap) == 0)
 632                         {
 633                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 634
 635                                 /* serialize the message */
 636                                 CtdlSerializeMessage(&sermsg, msg);
 637
 638                                 /* now send it */
 639                                 if (StrLength(nexthop) == 0) {
 640                                         nexthop = Buf;
 641                                 }
 642                                 snprintf(filename,
 643                                          sizeof filename,
 644                                          "%s/%s@%lx%x",
 645                                          ctdl_netout_dir,
 646                                          ChrPtr(nexthop),
 647                                          time(NULL),
 648                                          rand()
 649                                 );
 650                                 QN_syslog(LOG_DEBUG, "Appending to %s", filename);
 651                                 fp = fopen(filename, "ab");
 652                                 if (fp != NULL) {
 653                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 654                                         fclose(fp);
 655                                 }
 656                                 else {
 657                                         QN_syslog(LOG_ERR, "%s: %s", filename, strerror(errno));
 658                                 }
 659                                 free(sermsg.ser);
 660                                 CM_Free(msg);
 661                                 FreeStrBuf(&Buf);
 662                                 return;
 663                         }
 664
 665                         else {  /* invalid destination node name */
 666                                 FreeStrBuf(&Buf);
 667
 668                                 network_bounce(&msg,
 669 "A message you sent could not be delivered due to an invalid destination node"
 670 " name.  Please check the address and try sending the message again.\n");
 671                                 return;
 672
 673                         }
 674                 }
 675         }
 676
 677         /*
 678          * Check to see if we already have a copy of this message, and
 679          * abort its processing if so.  (We used to post a warning to Aide>
 680          * every time this happened, but the network is now so densely
 681          * connected that it's inevitable.)
 682          */
 683         if (network_usetable(msg) != 0) {
 684                 CM_Free(msg);
 685                 return;
 686         }
 687
 688         /* Learn network topology from the path */
 689         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 690                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 691                                      msg->cm_fields[eMessagePath],
 692                                      the_netmap,
 693                                      netmap_changed);
 694         }
 695
 696         /* Is the sending node giving us a very persuasive suggestion about
 697          * which room this message should be saved in?  If so, go with that.
 698          */
 699         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 700                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 701         }
 702
 703         /* Otherwise, does it have a recipient?  If so, validate it... */
 704         else if (!CM_IsEmpty(msg, eRecipient)) {
 705                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 706                 if (recp != NULL) if (recp->num_error != 0) {
 707                         network_bounce(&msg,
 708                                 "A message you sent could not be delivered due to an invalid address.\n"
 709                                 "Please check the address and try sending the message again.\n");
 710                         free_recipients(recp);
 711                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.");
 712                         return;
 713                 }
 714                 strcpy(target_room, "");        /* no target room if mail */
 715         }
 716
 717         /* Our last shot at finding a home for this message is to see if
 718          * it has the eOriginalRoom (O) field (Originating room) set.
 719          */
 720         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 721                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 722         }
 723
 724         /* Strip out fields that are only relevant during transit */
 725         CM_FlushField(msg, eDestination);
 726         CM_FlushField(msg, eRemoteRoom);
 727
 728         /* save the message into a room */
 729         if (PerformNetprocHooks(msg, target_room) == 0) {
 730                 msg->cm_flags = CM_SKIP_HOOKS;
 731                 CtdlSubmitMsg(msg, recp, target_room, 0);
 732         }
 733         CM_Free(msg);
 734         free_recipients(recp);
 735 }
 736
 737
 738 /*
 739  * Process a single message from a single file from the inbound queue
 740  */
 741 void network_process_message(FILE *fp,
 742                              long msgstart,
 743                              long msgend,
 744                              HashList *working_ignetcfg,
 745                              HashList *the_netmap,
 746                              int *netmap_changed)
 747 {
 748         long hold_pos;
 749         long size;
 750         char *buffer;
 751
 752         hold_pos = ftell(fp);
 753         size = msgend - msgstart + 1;
 754         buffer = malloc(size);
 755         if (buffer != NULL) {
 756                 fseek(fp, msgstart, SEEK_SET);
 757                 if (fread(buffer, size, 1, fp) > 0) {
 758                         network_process_buffer(buffer,
 759                                                size,
 760                                                working_ignetcfg,
 761                                                the_netmap,
 762                                                netmap_changed);
 763                 }
 764                 free(buffer);
 765         }
 766
 767         fseek(fp, hold_pos, SEEK_SET);
 768 }
 769
 770
 771 /*
 772  * Process a single file from the inbound queue
 773  */
 774 void network_process_file(char *filename,
 775                           HashList *working_ignetcfg,
 776                           HashList *the_netmap,
 777                           int *netmap_changed)
 778 {
 779         struct CitContext *CCC = CC;
 780         FILE *fp;
 781         long msgstart = (-1L);
 782         long msgend = (-1L);
 783         long msgcur = 0L;
 784         int ch;
 785         int nMessages = 0;
 786
 787         fp = fopen(filename, "rb");
 788         if (fp == NULL) {
 789                 QN_syslog(LOG_CRIT, "Error opening %s: %s", filename, strerror(errno));
 790                 return;
 791         }
 792
 793         fseek(fp, 0L, SEEK_END);
 794         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s", ftell(fp), filename);
 795         rewind(fp);
 796
 797         /* Look for messages in the data stream and break them out */
 798         while (ch = getc(fp), ch >= 0) {
 799
 800                 if (ch == 255) {
 801                         if (msgstart >= 0L) {
 802                                 msgend = msgcur - 1;
 803                                 network_process_message(fp,
 804                                                         msgstart,
 805                                                         msgend,
 806                                                         working_ignetcfg,
 807                                                         the_netmap,
 808                                                         netmap_changed);
 809                         }
 810                         msgstart = msgcur;
 811                 }
 812
 813                 ++msgcur;
 814                 nMessages ++;
 815         }
 816
 817         msgend = msgcur - 1;
 818         if (msgstart >= 0L) {
 819                 network_process_message(fp,
 820                                         msgstart,
 821                                         msgend,
 822                                         working_ignetcfg,
 823                                         the_netmap,
 824                                         netmap_changed);
 825                 nMessages ++;
 826         }
 827
 828         if (nMessages > 0)
 829                 QN_syslog(LOG_INFO, "network: processed %d messages in %s", nMessages, filename);
 830
 831         fclose(fp);
 832         unlink(filename);
 833 }
 834
 835
 836 /*
 837  * Process anything in the inbound queue
 838  */
 839 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 840 {
 841         struct CitContext *CCC = CC;
 842         DIR *dp;
 843         struct dirent *d;
 844         struct dirent *filedir_entry;
 845         struct stat statbuf;
 846         char filename[PATH_MAX];
 847         static time_t last_spoolin_mtime = 0L;
 848         int d_type = 0;
 849         int d_namelen;
 850
 851         /*
 852          * Check the spoolin directory's modification time.  If it hasn't
 853          * been touched, we don't need to scan it.
 854          */
 855         if (stat(ctdl_netin_dir, &statbuf)) return;
 856         if (statbuf.st_mtime == last_spoolin_mtime) {
 857                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue");
 858                 return;
 859         }
 860         last_spoolin_mtime = statbuf.st_mtime;
 861         QNM_syslog(LOG_DEBUG, "network: processing inbound queue");
 862
 863         /*
 864          * Ok, there's something interesting in there, so scan it.
 865          */
 866         dp = opendir(ctdl_netin_dir);
 867         if (dp == NULL) return;
 868
 869         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 870         if (d == NULL) {
 871                 closedir(dp);
 872                 return;
 873         }
 874
 875         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 876                (filedir_entry != NULL))
 877         {
 878 #ifdef _DIRENT_HAVE_D_NAMLEN
 879                 d_namelen = filedir_entry->d_namlen;
 880
 881 #else
 882                 d_namelen = strlen(filedir_entry->d_name);
 883 #endif
 884
 885 #ifdef _DIRENT_HAVE_D_TYPE
 886                 d_type = filedir_entry->d_type;
 887 #else
 888                 d_type = DT_UNKNOWN;
 889 #endif
 890                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 891                         continue; /* Ignore backup files... */
 892
 893                 if ((d_namelen == 1) &&
 894                     (filedir_entry->d_name[0] == '.'))
 895                         continue;
 896
 897                 if ((d_namelen == 2) &&
 898                     (filedir_entry->d_name[0] == '.') &&
 899                     (filedir_entry->d_name[1] == '.'))
 900                         continue;
 901
 902                 if (d_type == DT_UNKNOWN) {
 903                         struct stat s;
 904                         char path[PATH_MAX];
 905
 906                         snprintf(path,
 907                                  PATH_MAX,
 908                                  "%s/%s",
 909                                  ctdl_netin_dir,
 910                                  filedir_entry->d_name);
 911
 912                         if (lstat(path, &s) == 0) {
 913                                 d_type = IFTODT(s.st_mode);
 914                         }
 915                 }
 916
 917                 switch (d_type)
 918                 {
 919                 case DT_DIR:
 920                         break;
 921                 case DT_LNK: /* TODO: check whether its a file or a directory */
 922                 case DT_REG:
 923                         snprintf(filename,
 924                                 sizeof filename,
 925                                 "%s/%s",
 926                                 ctdl_netin_dir,
 927                                 d->d_name
 928                         );
 929                         network_process_file(filename,
 930                                              working_ignetcfg,
 931                                              the_netmap,
 932                                              netmap_changed);
 933                 }
 934         }
 935
 936         closedir(dp);
 937         free(d);
 938 }
 939
 940 /*
 941  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 942  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 943  */
 944 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 945 {
 946         struct CitContext *CCC = CC;
 947         IOBuffer IOB;
 948         FDIOBuffer FDIO;
 949         int d_namelen;
 950         DIR *dp;
 951         struct dirent *d;
 952         struct dirent *filedir_entry;
 953         const char *pch;
 954         char spooloutfilename[PATH_MAX];
 955         char filename[PATH_MAX];
 956         const StrBuf *nexthop;
 957         StrBuf *NextHop;
 958         int i;
 959         struct stat statbuf;
 960         int nFailed = 0;
 961         int d_type = 0;
 962
 963
 964         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 965         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 966         if (d == NULL)  return;
 967
 968         dp = opendir(ctdl_netout_dir);
 969         if (dp == NULL) {
 970                 free(d);
 971                 return;
 972         }
 973
 974         NextHop = NewStrBuf();
 975         memset(&IOB, 0, sizeof(IOBuffer));
 976         memset(&FDIO, 0, sizeof(FDIOBuffer));
 977         FDIO.IOB = &IOB;
 978
 979         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 980                (filedir_entry != NULL))
 981         {
 982 #ifdef _DIRENT_HAVE_D_NAMLEN
 983                 d_namelen = filedir_entry->d_namlen;
 984
 985 #else
 986                 d_namelen = strlen(filedir_entry->d_name);
 987 #endif
 988
 989 #ifdef _DIRENT_HAVE_D_TYPE
 990                 d_type = filedir_entry->d_type;
 991 #else
 992                 d_type = DT_UNKNOWN;
 993 #endif
 994                 if (d_type == DT_DIR)
 995                         continue;
 996
 997                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 998                         continue; /* Ignore backup files... */
 999
1000                 if ((d_namelen == 1) &&
1001                     (filedir_entry->d_name[0] == '.'))
1002                         continue;
1003
1004                 if ((d_namelen == 2) &&
1005                     (filedir_entry->d_name[0] == '.') &&
1006                     (filedir_entry->d_name[1] == '.'))
1007                         continue;
1008
1009                 pch = strchr(filedir_entry->d_name, '@');
1010                 if (pch == NULL)
1011                         continue;
1012
1013                 snprintf(filename,
1014                          sizeof filename,
1015                          "%s/%s",
1016                          ctdl_netout_dir,
1017                          filedir_entry->d_name);
1018
1019                 StrBufPlain(NextHop,
1020                             filedir_entry->d_name,
1021                             pch - filedir_entry->d_name);
1022
1023                 snprintf(spooloutfilename,
1024                          sizeof spooloutfilename,
1025                          "%s/%s",
1026                          ctdl_netout_dir,
1027                          ChrPtr(NextHop));
1028
1029                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s", filename, ChrPtr(NextHop));
1030                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
1031                         nFailed++;
1032                         QN_syslog(LOG_DEBUG, "Currently online with %s - skipping for now", ChrPtr(NextHop));
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.",
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.",
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, "Spoolfile %s now "SIZE_T_FMT" KB", spooloutfilename, (dsize + fsize)/1024);
1090                         }
1091                         else {
1092                                 nFailed++;
1093                                 QN_syslog(LOG_ERR, "failed to append to %s [%s]; rolling back..", spooloutfilename, strerror(errno));
1094                                 /* whoops partial append?? truncate spooloutfilename again! */
1095                                 ftruncate(outfd, dsize);
1096                         }
1097                         FDIOBufferDelete(&FDIO);
1098                         close(infd);
1099                         close(outfd);
1100                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1101                 }
1102         }
1103         closedir(dp);
1104
1105         if (nFailed > 0) {
1106                 FreeStrBuf(&NextHop);
1107                 QN_syslog(LOG_INFO, "skipping Spoolcleanup because of %d files unprocessed.", nFailed);
1108
1109                 return;
1110         }
1111
1112         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1113         dp = opendir(ctdl_netout_dir);
1114         if (dp == NULL) {
1115                 FreeStrBuf(&NextHop);
1116                 free(d);
1117                 return;
1118         }
1119
1120         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1121                (filedir_entry != NULL))
1122         {
1123 #ifdef _DIRENT_HAVE_D_NAMLEN
1124                 d_namelen = filedir_entry->d_namlen;
1125
1126 #else
1127                 d_namelen = strlen(filedir_entry->d_name);
1128 #endif
1129
1130 #ifdef _DIRENT_HAVE_D_TYPE
1131                 d_type = filedir_entry->d_type;
1132 #else
1133                 d_type = DT_UNKNOWN;
1134 #endif
1135                 if (d_type == DT_DIR)
1136                         continue;
1137
1138                 if ((d_namelen == 1) &&
1139                     (filedir_entry->d_name[0] == '.'))
1140                         continue;
1141
1142                 if ((d_namelen == 2) &&
1143                     (filedir_entry->d_name[0] == '.') &&
1144                     (filedir_entry->d_name[1] == '.'))
1145                         continue;
1146
1147                 pch = strchr(filedir_entry->d_name, '@');
1148                 if (pch == NULL) /* no @ in name? consolidated file. */
1149                         continue;
1150
1151                 StrBufPlain(NextHop,
1152                             filedir_entry->d_name,
1153                             pch - filedir_entry->d_name);
1154
1155                 snprintf(filename,
1156                         sizeof filename,
1157                         "%s/%s",
1158                         ctdl_netout_dir,
1159                         filedir_entry->d_name
1160                 );
1161
1162                 i = CtdlIsValidNode(&nexthop,
1163                                     NULL,
1164                                     NextHop,
1165                                     working_ignetcfg,
1166                                     the_netmap);
1167
1168                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1169                         unlink(filename);
1170                 }
1171         }
1172         FreeStrBuf(&NextHop);
1173         free(d);
1174         closedir(dp);
1175 }
1176
1177 void free_spoolcontrol_struct(SpoolControl **sc)
1178 {
1179         free_spoolcontrol_struct_members(*sc);
1180         free(*sc);
1181         *sc = NULL;
1182 }
1183
1184 void free_spoolcontrol_struct_members(SpoolControl *sc)
1185 {
1186         int i;
1187         FreeStrBuf(&sc->RoomInfo);
1188         FreeStrBuf(&sc->ListID);
1189         for (i = 0; i < maxRoomNetCfg; i++)
1190                 FreeStrBuf(&sc->Users[i]);
1191 }
1192
1193
1194
1195 /*
1196  * It's ok if these directories already exist.  Just fail silently.
1197  */
1198 void create_spool_dirs(void) {
1199         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1200                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1201         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1202                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1203         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1204                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1205         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1206                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1207         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1208                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1209         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1210                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1211         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1212                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1213         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1214                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1215 }
1216
1217 /*
1218  * Module entry point
1219  */
1220 CTDL_MODULE_INIT(network_spool)
1221 {
1222         if (!threading)
1223         {
1224                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1225                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1226                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1227                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1228                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1229                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1230                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1231                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1232
1233                 create_spool_dirs();
1234 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1235         }
1236         return "network_spool";
1237 }