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         CM_SetField(msg, eMesageText, reason, strlen(reason));
 134         msg->cm_format_type = 0;
 135
 136         /*
 137          * Turn the message around
 138          */
 139         CM_FlushField(msg, eRecipient);
 140         CM_FlushField(msg, eDestination);
 141
 142         len = snprintf(recipient, sizeof(recipient), "%s@%s",
 143                        msg->cm_fields[eAuthor],
 144                        msg->cm_fields[eNodeName]);
 145
 146         CM_SetField(msg, eAuthor, HKEY(BOUNCESOURCE));
 147         CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
 148         CM_SetField(msg, eMsgSubject, HKEY("Delivery Status Notification (Failure)"));
 149
 150         Netmap_AddMe(msg, HKEY("unknown_user"));
 151
 152         /* Now submit the message */
 153         valid = validate_recipients(recipient, NULL, 0);
 154         if (valid != NULL) if (valid->num_error != 0) {
 155                 free_recipients(valid);
 156                 valid = NULL;
 157         }
 158         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 159                 strcpy(force_room, CtdlGetConfigStr("c_aideroom"));
 160         }
 161         else {
 162                 strcpy(force_room, "");
 163         }
 164         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
 165                 strcpy(force_room, CtdlGetConfigStr("c_aideroom"));
 166         }
 167         CtdlSubmitMsg(msg, valid, force_room, 0);
 168
 169         /* Clean up */
 170         if (valid != NULL) free_recipients(valid);
 171         CM_Free(msg);
 172         QNM_syslog(LOG_DEBUG, "leaving network_bounce()\n");
 173 }
 174
 175
 176 void ParseLastSent(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 177 {
 178         RoomNetCfgLine *nptr;
 179         nptr = (RoomNetCfgLine *)
 180                 malloc(sizeof(RoomNetCfgLine));
 181         memset(nptr, 0, sizeof(RoomNetCfgLine));
 182         OneRNCFG->lastsent = extract_long(LinePos, 0);
 183         OneRNCFG->NetConfigs[ThisOne->C] = nptr;
 184 }
 185
 186 void ParseRoomAlias(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *rncfg)
 187 {
 188         if (rncfg->Sender != NULL)
 189                 return;
 190
 191         ParseGeneric(ThisOne, Line, LinePos, rncfg);
 192         rncfg->Sender = NewStrBufDup(rncfg->NetConfigs[roommailalias]->Value[0]);
 193 }
 194
 195 void ParseSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 196 {
 197         if (time(NULL) - extract_long(LinePos, 3) > EXP)
 198                 return; /* expired subscription... */
 199
 200         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 201 }
 202 void ParseUnSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 203 {
 204         if (time(NULL) - extract_long(LinePos, 2) > EXP)
 205                 return; /* expired subscription... */
 206
 207         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 208 }
 209
 210
 211 void SerializeLastSent(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *RNCfg, RoomNetCfgLine *data)
 212 {
 213         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 214         StrBufAppendPrintf(OutputBuffer, "|%ld\n", RNCfg->lastsent);
 215 }
 216
 217 void DeleteLastSent(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 218 {
 219         free(*data);
 220         *data = NULL;
 221 }
 222
 223 static const RoomNetCfg SpoolCfgs [4] = {
 224         listrecp,
 225         digestrecp,
 226         participate,
 227         ignet_push_share
 228 };
 229
 230 static const long SpoolCfgsCopyN [4] = {
 231         1, 1, 1, 2
 232 };
 233
 234 int HaveSpoolConfig(OneRoomNetCfg* RNCfg)
 235 {
 236         int i;
 237         int interested = 0;
 238         for (i=0; i < 4; i++) if (RNCfg->NetConfigs[SpoolCfgs[i]] == NULL) interested = 1;
 239         return interested;
 240 }
 241
 242 void Netmap_AddMe(struct CtdlMessage *msg, const char *defl, long defllen)
 243 {
 244         long node_len;
 245         char buf[SIZ];
 246
 247         /* prepend our node to the path */
 248         if (CM_IsEmpty(msg, eMessagePath)) {
 249                 CM_SetField(msg, eMessagePath, defl, defllen);
 250         }
 251         node_len = strlen(CtdlGetConfigStr("c_nodename"));
 252         if (node_len >= SIZ)
 253                 node_len = SIZ - 1;
 254         memcpy(buf, CtdlGetConfigStr("c_nodename"), node_len);
 255         buf[node_len] = '!';
 256         buf[node_len + 1] = '\0';
 257         CM_PrependToField(msg, eMessagePath, buf, node_len + 1);
 258 }
 259
 260 void InspectQueuedRoom(SpoolControl **pSC,
 261                        RoomProcList *room_to_spool,
 262                        HashList *working_ignetcfg,
 263                        HashList *the_netmap)
 264 {
 265         struct CitContext *CCC = CC;
 266         SpoolControl *sc;
 267         int i = 0;
 268
 269         sc = (SpoolControl*)malloc(sizeof(SpoolControl));
 270         memset(sc, 0, sizeof(SpoolControl));
 271         sc->RNCfg = room_to_spool->OneRNCfg;
 272         sc->lastsent = room_to_spool->lastsent;
 273         sc->working_ignetcfg = working_ignetcfg;
 274         sc->the_netmap = the_netmap;
 275
 276         /*
 277          * If the room doesn't exist, don't try to perform its networking tasks.
 278          * Normally this should never happen, but once in a while maybe a room gets
 279          * queued for networking and then deleted before it can happen.
 280          */
 281         if (CtdlGetRoom(&sc->room, room_to_spool->name) != 0) {
 282                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 283                 free(sc);
 284                 return;
 285         }
 286         if (sc->room.QRhighest <= sc->lastsent)
 287         {
 288                 QN_syslog(LOG_DEBUG, "nothing to do for <%s>\n", room_to_spool->name);
 289                 free(sc);
 290                 return;
 291         }
 292
 293         begin_critical_section(S_NETCONFIGS);
 294         if (sc->RNCfg == NULL)
 295                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 296
 297         if (!HaveSpoolConfig(sc->RNCfg))
 298         {
 299                 end_critical_section(S_NETCONFIGS);
 300                 free(sc);
 301                 /* nothing to do for this room... */
 302                 return;
 303         }
 304
 305         /* Now lets remember whats needed for the actual work... */
 306
 307         for (i=0; i < 4; i++)
 308         {
 309                 aggregate_recipients(&sc->Users[SpoolCfgs[i]],
 310                                      SpoolCfgs[i],
 311                                      sc->RNCfg,
 312                                      SpoolCfgsCopyN[i]);
 313         }
 314
 315         if (StrLength(sc->RNCfg->Sender) > 0)
 316                 sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
 317         end_critical_section(S_NETCONFIGS);
 318
 319         sc->next = *pSC;
 320         *pSC = sc;
 321
 322 }
 323
 324 void CalcListID(SpoolControl *sc)
 325 {
 326         StrBuf *RoomName;
 327         const char *err;
 328         int fd;
 329         struct CitContext *CCC = CC;
 330         char filename[PATH_MAX];
 331 #define MAX_LISTIDLENGTH 150
 332
 333         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 334         fd = open(filename, 0);
 335
 336         if (fd > 0) {
 337                 struct stat stbuf;
 338
 339                 if ((fstat(fd, &stbuf) == 0) &&
 340                     (stbuf.st_size > 0))
 341                 {
 342                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 343                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 344                 }
 345                 close(fd);
 346         }
 347
 348         sc->ListID = NewStrBufPlain(NULL, 1024);
 349         if (StrLength(sc->RoomInfo) > 0)
 350         {
 351                 const char *Pos = NULL;
 352                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 353
 354                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 355                 {
 356                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 357                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 358                 }
 359                 StrBufAsciify(sc->ListID, ' ');
 360         }
 361         else
 362         {
 363                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 364         }
 365
 366         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 367         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 368         StrBufAsciify(RoomName, '_');
 369         StrBufReplaceChars(RoomName, ' ', '_');
 370
 371         if (StrLength(sc->Users[roommailalias]) > 0)
 372         {
 373                 long Pos;
 374                 const char *AtPos;
 375
 376                 Pos = StrLength(sc->ListID);
 377                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 378                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 379
 380                 if (AtPos != NULL)
 381                 {
 382                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 383                 }
 384         }
 385         else
 386         {
 387                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 388                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 389                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 390                 StrBufAppendBufPlain(sc->ListID, CtdlGetConfigStr("c_fqdn"), -1, 0);
 391                 /*
 392                  * this used to be:
 393                  * roomname <Room-Number.list-id.fqdn>
 394                  * according to rfc2919.txt it only has to be a uniq identifier
 395                  * under the domain of the system;
 396                  * in general MUAs use it to calculate the reply address nowadays.
 397                  */
 398         }
 399         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 400
 401         if (StrLength(sc->Users[roommailalias]) == 0)
 402         {
 403                 sc->Users[roommailalias] = NewStrBuf();
 404
 405                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 406                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 407                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 408                 StrBufAppendBufPlain(sc->Users[roommailalias], CtdlGetConfigStr("c_fqdn"), -1, 0);
 409
 410                 StrBufLowerCase(sc->Users[roommailalias]);
 411         }
 412
 413         FreeStrBuf(&RoomName);
 414 }
 415
 416 static time_t last_digest_delivery = 0;
 417
 418 /*
 419  * Batch up and send all outbound traffic from the current room
 420  */
 421 void network_spoolout_room(SpoolControl *sc)
 422 {
 423         struct CitContext *CCC = CC;
 424         char buf[SIZ];
 425         int i;
 426         long lastsent;
 427
 428         /*
 429          * If the room doesn't exist, don't try to perform its networking tasks.
 430          * Normally this should never happen, but once in a while maybe a room gets
 431          * queued for networking and then deleted before it can happen.
 432          */
 433         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 434
 435         syslog(LOG_INFO, "Networking started for <%s>\n", CCC->room.QRname);
 436
 437         CalcListID(sc);
 438
 439         /* remember where we started... */
 440         lastsent = sc->lastsent;
 441
 442         /* Fetch the messages we ought to send & prepare them. */
 443         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 444                 network_spool_msg, sc);
 445
 446         if (StrLength(sc->Users[roommailalias]) > 0)
 447         {
 448                 long len;
 449                 len = StrLength(sc->Users[roommailalias]);
 450                 if (len + 1 > sizeof(buf))
 451                         len = sizeof(buf) - 1;
 452                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 453                 buf[len] = '\0';
 454         }
 455         else
 456         {
 457                 snprintf(buf, sizeof buf, "room_%s@%s",
 458                          CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
 459         }
 460
 461         for (i=0; buf[i]; ++i) {
 462                 buf[i] = tolower(buf[i]);
 463                 if (isspace(buf[i])) buf[i] = '_';
 464         }
 465
 466
 467         /* If we wrote a digest, deliver it and then close it */
 468         if (sc->Users[digestrecp] != NULL) {
 469                 time_t now = time(NULL);
 470                 time_t secs_today = now % (24 * 60 * 60);
 471                 long delta = 0;
 472
 473                 if (last_digest_delivery != 0) {
 474                         delta = now - last_digest_delivery;
 475                         delta = (24 * 60 * 60) - delta;
 476                 }
 477
 478                 if ((secs_today < 300) &&
 479                     (delta < 300))
 480                 {
 481                         if (sc->digestfp == NULL) {
 482                                 sc->digestfp = create_digest_file(&sc->room, 0);
 483                         }
 484                         if (sc->digestfp != NULL) {
 485                                 last_digest_delivery = now;
 486                                 fprintf(sc->digestfp,
 487                                         " -----------------------------------"
 488                                         "------------------------------------"
 489                                         "-------\n"
 490                                         "You are subscribed to the '%s' "
 491                                         "list.\n"
 492                                         "To post to the list: %s\n",
 493                                         CCC->room.QRname, buf
 494                                         );
 495                                 network_deliver_digest(sc);     /* deliver */
 496                                 remove_digest_file(&sc->room);
 497                         }
 498                 }
 499         }
 500         if (sc->digestfp != NULL) {
 501                 fclose(sc->digestfp);
 502                 sc->digestfp = NULL;
 503         }
 504
 505         /* Now rewrite the config file */
 506         if (sc->lastsent != lastsent)
 507         {
 508                 begin_critical_section(S_NETCONFIGS);
 509                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 510
 511                 sc->RNCfg->lastsent = sc->lastsent;
 512                 sc->RNCfg->changed = 1;
 513                 end_critical_section(S_NETCONFIGS);
 514         }
 515 }
 516
 517
 518 /*
 519  * Check the use table.  This is a list of messages which have recently
 520  * arrived on the system.  It is maintained and queried to prevent the same
 521  * message from being entered into the database multiple times if it happens
 522  * to arrive multiple times by accident.
 523  */
 524 int network_usetable(struct CtdlMessage *msg)
 525 {
 526         StrBuf *msgid;
 527         struct CitContext *CCC = CC;
 528         time_t now;
 529
 530         /* Bail out if we can't generate a message ID */
 531         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 532         {
 533                 return(0);
 534         }
 535
 536         /* Generate the message ID */
 537         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 538         if (haschar(ChrPtr(msgid), '@') == 0) {
 539                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 540                 if (!CM_IsEmpty(msg, eNodeName)) {
 541                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 542                 }
 543                 else {
 544                         FreeStrBuf(&msgid);
 545                         return(0);
 546                 }
 547         }
 548         now = time(NULL);
 549         if (CheckIfAlreadySeen("Networker Import",
 550                                msgid,
 551                                now, 0,
 552                                eUpdate,
 553                                CCC->cs_pid, 0) != 0)
 554         {
 555                 FreeStrBuf(&msgid);
 556                 return(1);
 557         }
 558         FreeStrBuf(&msgid);
 559
 560         return(0);
 561 }
 562
 563
 564 /*
 565  * Process a buffer containing a single message from a single file
 566  * from the inbound queue
 567  */
 568 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 569 {
 570         long len;
 571         struct CitContext *CCC = CC;
 572         StrBuf *Buf = NULL;
 573         struct CtdlMessage *msg = NULL;
 574         long pos;
 575         int field;
 576         recptypes *recp = NULL;
 577         char target_room[ROOMNAMELEN];
 578         struct ser_ret sermsg;
 579         char filename[PATH_MAX];
 580         FILE *fp;
 581         const StrBuf *nexthop = NULL;
 582         unsigned char firstbyte;
 583         unsigned char lastbyte;
 584
 585         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 586
 587         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 588         firstbyte = buffer[0];
 589         lastbyte = buffer[size-1];
 590         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 591                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 592                           size, firstbyte, lastbyte);
 593                 return;
 594         }
 595
 596         /* Set default target room to trash */
 597         strcpy(target_room, TWITROOM);
 598
 599         /* Load the message into memory */
 600         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 601         memset(msg, 0, sizeof(struct CtdlMessage));
 602         msg->cm_magic = CTDLMESSAGE_MAGIC;
 603         msg->cm_anon_type = buffer[1];
 604         msg->cm_format_type = buffer[2];
 605
 606         for (pos = 3; pos < size; ++pos) {
 607                 field = buffer[pos];
 608                 len = strlen(buffer + pos + 1);
 609                 CM_SetField(msg, field, buffer + pos + 1, len);
 610                 pos = pos + len + 1;
 611         }
 612
 613         /* Check for message routing */
 614         if (!CM_IsEmpty(msg, eDestination)) {
 615                 if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 616
 617                         /* route the message */
 618                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 619                         if (CtdlIsValidNode(&nexthop,
 620                                             NULL,
 621                                             Buf,
 622                                             working_ignetcfg,
 623                                             the_netmap) == 0)
 624                         {
 625                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 626
 627                                 /* serialize the message */
 628                                 CtdlSerializeMessage(&sermsg, msg);
 629
 630                                 /* now send it */
 631                                 if (StrLength(nexthop) == 0) {
 632                                         nexthop = Buf;
 633                                 }
 634                                 snprintf(filename,
 635                                          sizeof filename,
 636                                          "%s/%s@%lx%x",
 637                                          ctdl_netout_dir,
 638                                          ChrPtr(nexthop),
 639                                          time(NULL),
 640                                          rand()
 641                                 );
 642                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 643                                 fp = fopen(filename, "ab");
 644                                 if (fp != NULL) {
 645                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 646                                         fclose(fp);
 647                                 }
 648                                 else {
 649                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 650                                 }
 651                                 free(sermsg.ser);
 652                                 CM_Free(msg);
 653                                 FreeStrBuf(&Buf);
 654                                 return;
 655                         }
 656
 657                         else {  /* invalid destination node name */
 658                                 FreeStrBuf(&Buf);
 659
 660                                 network_bounce(&msg,
 661 "A message you sent could not be delivered due to an invalid destination node"
 662 " name.  Please check the address and try sending the message again.\n");
 663                                 return;
 664
 665                         }
 666                 }
 667         }
 668
 669         /*
 670          * Check to see if we already have a copy of this message, and
 671          * abort its processing if so.  (We used to post a warning to Aide>
 672          * every time this happened, but the network is now so densely
 673          * connected that it's inevitable.)
 674          */
 675         if (network_usetable(msg) != 0) {
 676                 CM_Free(msg);
 677                 return;
 678         }
 679
 680         /* Learn network topology from the path */
 681         if (!CM_IsEmpty(msg, eNodeName) && !CM_IsEmpty(msg, eMessagePath)) {
 682                 NetworkLearnTopology(msg->cm_fields[eNodeName],
 683                                      msg->cm_fields[eMessagePath],
 684                                      the_netmap,
 685                                      netmap_changed);
 686         }
 687
 688         /* Is the sending node giving us a very persuasive suggestion about
 689          * which room this message should be saved in?  If so, go with that.
 690          */
 691         if (!CM_IsEmpty(msg, eRemoteRoom)) {
 692                 safestrncpy(target_room, msg->cm_fields[eRemoteRoom], sizeof target_room);
 693         }
 694
 695         /* Otherwise, does it have a recipient?  If so, validate it... */
 696         else if (!CM_IsEmpty(msg, eRecipient)) {
 697                 recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
 698                 if (recp != NULL) if (recp->num_error != 0) {
 699                         network_bounce(&msg,
 700                                 "A message you sent could not be delivered due to an invalid address.\n"
 701                                 "Please check the address and try sending the message again.\n");
 702                         free_recipients(recp);
 703                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 704                         return;
 705                 }
 706                 strcpy(target_room, "");        /* no target room if mail */
 707         }
 708
 709         /* Our last shot at finding a home for this message is to see if
 710          * it has the eOriginalRoom (O) field (Originating room) set.
 711          */
 712         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 713                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 714         }
 715
 716         /* Strip out fields that are only relevant during transit */
 717         CM_FlushField(msg, eDestination);
 718         CM_FlushField(msg, eRemoteRoom);
 719
 720         /* save the message into a room */
 721         if (PerformNetprocHooks(msg, target_room) == 0) {
 722                 msg->cm_flags = CM_SKIP_HOOKS;
 723                 CtdlSubmitMsg(msg, recp, target_room, 0);
 724         }
 725         CM_Free(msg);
 726         free_recipients(recp);
 727 }
 728
 729
 730 /*
 731  * Process a single message from a single file from the inbound queue
 732  */
 733 void network_process_message(FILE *fp,
 734                              long msgstart,
 735                              long msgend,
 736                              HashList *working_ignetcfg,
 737                              HashList *the_netmap,
 738                              int *netmap_changed)
 739 {
 740         long hold_pos;
 741         long size;
 742         char *buffer;
 743
 744         hold_pos = ftell(fp);
 745         size = msgend - msgstart + 1;
 746         buffer = malloc(size);
 747         if (buffer != NULL) {
 748                 fseek(fp, msgstart, SEEK_SET);
 749                 if (fread(buffer, size, 1, fp) > 0) {
 750                         network_process_buffer(buffer,
 751                                                size,
 752                                                working_ignetcfg,
 753                                                the_netmap,
 754                                                netmap_changed);
 755                 }
 756                 free(buffer);
 757         }
 758
 759         fseek(fp, hold_pos, SEEK_SET);
 760 }
 761
 762
 763 /*
 764  * Process a single file from the inbound queue
 765  */
 766 void network_process_file(char *filename,
 767                           HashList *working_ignetcfg,
 768                           HashList *the_netmap,
 769                           int *netmap_changed)
 770 {
 771         struct CitContext *CCC = CC;
 772         FILE *fp;
 773         long msgstart = (-1L);
 774         long msgend = (-1L);
 775         long msgcur = 0L;
 776         int ch;
 777         int nMessages = 0;
 778
 779         fp = fopen(filename, "rb");
 780         if (fp == NULL) {
 781                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 782                 return;
 783         }
 784
 785         fseek(fp, 0L, SEEK_END);
 786         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 787         rewind(fp);
 788
 789         /* Look for messages in the data stream and break them out */
 790         while (ch = getc(fp), ch >= 0) {
 791
 792                 if (ch == 255) {
 793                         if (msgstart >= 0L) {
 794                                 msgend = msgcur - 1;
 795                                 network_process_message(fp,
 796                                                         msgstart,
 797                                                         msgend,
 798                                                         working_ignetcfg,
 799                                                         the_netmap,
 800                                                         netmap_changed);
 801                         }
 802                         msgstart = msgcur;
 803                 }
 804
 805                 ++msgcur;
 806                 nMessages ++;
 807         }
 808
 809         msgend = msgcur - 1;
 810         if (msgstart >= 0L) {
 811                 network_process_message(fp,
 812                                         msgstart,
 813                                         msgend,
 814                                         working_ignetcfg,
 815                                         the_netmap,
 816                                         netmap_changed);
 817                 nMessages ++;
 818         }
 819
 820         if (nMessages > 0)
 821                 QN_syslog(LOG_INFO,
 822                           "network: processed %d messages in %s\n",
 823                           nMessages,
 824                           filename);
 825
 826         fclose(fp);
 827         unlink(filename);
 828 }
 829
 830
 831 /*
 832  * Process anything in the inbound queue
 833  */
 834 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 835 {
 836         struct CitContext *CCC = CC;
 837         DIR *dp;
 838         struct dirent *d;
 839         struct dirent *filedir_entry;
 840         struct stat statbuf;
 841         char filename[PATH_MAX];
 842         static time_t last_spoolin_mtime = 0L;
 843         int d_type = 0;
 844         int d_namelen;
 845
 846         /*
 847          * Check the spoolin directory's modification time.  If it hasn't
 848          * been touched, we don't need to scan it.
 849          */
 850         if (stat(ctdl_netin_dir, &statbuf)) return;
 851         if (statbuf.st_mtime == last_spoolin_mtime) {
 852                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 853                 return;
 854         }
 855         last_spoolin_mtime = statbuf.st_mtime;
 856         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 857
 858         /*
 859          * Ok, there's something interesting in there, so scan it.
 860          */
 861         dp = opendir(ctdl_netin_dir);
 862         if (dp == NULL) return;
 863
 864         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 865         if (d == NULL) {
 866                 closedir(dp);
 867                 return;
 868         }
 869
 870         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 871                (filedir_entry != NULL))
 872         {
 873 #ifdef _DIRENT_HAVE_D_NAMLEN
 874                 d_namelen = filedir_entry->d_namlen;
 875
 876 #else
 877                 d_namelen = strlen(filedir_entry->d_name);
 878 #endif
 879
 880 #ifdef _DIRENT_HAVE_D_TYPE
 881                 d_type = filedir_entry->d_type;
 882 #else
 883                 d_type = DT_UNKNOWN;
 884 #endif
 885                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 886                         continue; /* Ignore backup files... */
 887
 888                 if ((d_namelen == 1) &&
 889                     (filedir_entry->d_name[0] == '.'))
 890                         continue;
 891
 892                 if ((d_namelen == 2) &&
 893                     (filedir_entry->d_name[0] == '.') &&
 894                     (filedir_entry->d_name[1] == '.'))
 895                         continue;
 896
 897                 if (d_type == DT_UNKNOWN) {
 898                         struct stat s;
 899                         char path[PATH_MAX];
 900
 901                         snprintf(path,
 902                                  PATH_MAX,
 903                                  "%s/%s",
 904                                  ctdl_netin_dir,
 905                                  filedir_entry->d_name);
 906
 907                         if (lstat(path, &s) == 0) {
 908                                 d_type = IFTODT(s.st_mode);
 909                         }
 910                 }
 911
 912                 switch (d_type)
 913                 {
 914                 case DT_DIR:
 915                         break;
 916                 case DT_LNK: /* TODO: check whether its a file or a directory */
 917                 case DT_REG:
 918                         snprintf(filename,
 919                                 sizeof filename,
 920                                 "%s/%s",
 921                                 ctdl_netin_dir,
 922                                 d->d_name
 923                         );
 924                         network_process_file(filename,
 925                                              working_ignetcfg,
 926                                              the_netmap,
 927                                              netmap_changed);
 928                 }
 929         }
 930
 931         closedir(dp);
 932         free(d);
 933 }
 934
 935 /*
 936  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 937  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 938  */
 939 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 940 {
 941         struct CitContext *CCC = CC;
 942         IOBuffer IOB;
 943         FDIOBuffer FDIO;
 944         int d_namelen;
 945         DIR *dp;
 946         struct dirent *d;
 947         struct dirent *filedir_entry;
 948         const char *pch;
 949         char spooloutfilename[PATH_MAX];
 950         char filename[PATH_MAX];
 951         const StrBuf *nexthop;
 952         StrBuf *NextHop;
 953         int i;
 954         struct stat statbuf;
 955         int nFailed = 0;
 956         int d_type = 0;
 957
 958
 959         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 960         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 961         if (d == NULL)  return;
 962
 963         dp = opendir(ctdl_netout_dir);
 964         if (dp == NULL) {
 965                 free(d);
 966                 return;
 967         }
 968
 969         NextHop = NewStrBuf();
 970         memset(&IOB, 0, sizeof(IOBuffer));
 971         memset(&FDIO, 0, sizeof(FDIOBuffer));
 972         FDIO.IOB = &IOB;
 973
 974         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 975                (filedir_entry != NULL))
 976         {
 977 #ifdef _DIRENT_HAVE_D_NAMLEN
 978                 d_namelen = filedir_entry->d_namlen;
 979
 980 #else
 981                 d_namelen = strlen(filedir_entry->d_name);
 982 #endif
 983
 984 #ifdef _DIRENT_HAVE_D_TYPE
 985                 d_type = filedir_entry->d_type;
 986 #else
 987                 d_type = DT_UNKNOWN;
 988 #endif
 989                 if (d_type == DT_DIR)
 990                         continue;
 991
 992                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 993                         continue; /* Ignore backup files... */
 994
 995                 if ((d_namelen == 1) &&
 996                     (filedir_entry->d_name[0] == '.'))
 997                         continue;
 998
 999                 if ((d_namelen == 2) &&
1000                     (filedir_entry->d_name[0] == '.') &&
1001                     (filedir_entry->d_name[1] == '.'))
1002                         continue;
1003
1004                 pch = strchr(filedir_entry->d_name, '@');
1005                 if (pch == NULL)
1006                         continue;
1007
1008                 snprintf(filename,
1009                          sizeof filename,
1010                          "%s/%s",
1011                          ctdl_netout_dir,
1012                          filedir_entry->d_name);
1013
1014                 StrBufPlain(NextHop,
1015                             filedir_entry->d_name,
1016                             pch - filedir_entry->d_name);
1017
1018                 snprintf(spooloutfilename,
1019                          sizeof spooloutfilename,
1020                          "%s/%s",
1021                          ctdl_netout_dir,
1022                          ChrPtr(NextHop));
1023
1024                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
1025                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
1026                         nFailed++;
1027                         QN_syslog(LOG_DEBUG,
1028                                   "Currently online with %s - skipping for now\n",
1029                                   ChrPtr(NextHop)
1030                                 );
1031                 }
1032                 else {
1033                         size_t dsize;
1034                         size_t fsize;
1035                         int infd, outfd;
1036                         const char *err = NULL;
1037                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
1038
1039                         infd = open(filename, O_RDONLY);
1040                         if (infd == -1) {
1041                                 nFailed++;
1042                                 QN_syslog(LOG_ERR,
1043                                           "failed to open %s for reading due to %s; skipping.\n",
1044                                           filename, strerror(errno)
1045                                         );
1046                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1047                                 continue;
1048                         }
1049
1050                         outfd = open(spooloutfilename,
1051                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1052                                   S_IRUSR|S_IWUSR);
1053                         if (outfd == -1)
1054                         {
1055                                 outfd = open(spooloutfilename,
1056                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1057                                              S_IRUSR | S_IWUSR);
1058                         }
1059                         if (outfd == -1) {
1060                                 nFailed++;
1061                                 QN_syslog(LOG_ERR,
1062                                           "failed to open %s for reading due to %s; skipping.\n",
1063                                           spooloutfilename, strerror(errno)
1064                                         );
1065                                 close(infd);
1066                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1067                                 continue;
1068                         }
1069
1070                         dsize = lseek(outfd, 0, SEEK_END);
1071                         lseek(outfd, -dsize, SEEK_SET);
1072
1073                         fstat(infd, &statbuf);
1074                         fsize = statbuf.st_size;
1075 /*
1076                         fsize = lseek(infd, 0, SEEK_END);
1077 */
1078                         IOB.fd = infd;
1079                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1080                         FDIO.ChunkSendRemain = fsize;
1081                         FDIO.TotalSentAlready = dsize;
1082                         err = NULL;
1083                         errno = 0;
1084                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1085                         if (err == NULL) {
1086                                 unlink(filename);
1087                                 QN_syslog(LOG_DEBUG,
1088                                           "Spoolfile %s now "SIZE_T_FMT" k\n",
1089                                           spooloutfilename,
1090                                           (dsize + fsize)/1024
1091                                         );
1092                         }
1093                         else {
1094                                 nFailed++;
1095                                 QN_syslog(LOG_ERR,
1096                                           "failed to append to %s [%s]; rolling back..\n",
1097                                           spooloutfilename, strerror(errno)
1098                                         );
1099                                 /* whoops partial append?? truncate spooloutfilename again! */
1100                                 ftruncate(outfd, dsize);
1101                         }
1102                         FDIOBufferDelete(&FDIO);
1103                         close(infd);
1104                         close(outfd);
1105                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1106                 }
1107         }
1108         closedir(dp);
1109
1110         if (nFailed > 0) {
1111                 FreeStrBuf(&NextHop);
1112                 QN_syslog(LOG_INFO,
1113                           "skipping Spoolcleanup because of %d files unprocessed.\n",
1114                           nFailed
1115                         );
1116
1117                 return;
1118         }
1119
1120         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1121         dp = opendir(ctdl_netout_dir);
1122         if (dp == NULL) {
1123                 FreeStrBuf(&NextHop);
1124                 free(d);
1125                 return;
1126         }
1127
1128         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1129                (filedir_entry != NULL))
1130         {
1131 #ifdef _DIRENT_HAVE_D_NAMLEN
1132                 d_namelen = filedir_entry->d_namlen;
1133
1134 #else
1135                 d_namelen = strlen(filedir_entry->d_name);
1136 #endif
1137
1138 #ifdef _DIRENT_HAVE_D_TYPE
1139                 d_type = filedir_entry->d_type;
1140 #else
1141                 d_type = DT_UNKNOWN;
1142 #endif
1143                 if (d_type == DT_DIR)
1144                         continue;
1145
1146                 if ((d_namelen == 1) &&
1147                     (filedir_entry->d_name[0] == '.'))
1148                         continue;
1149
1150                 if ((d_namelen == 2) &&
1151                     (filedir_entry->d_name[0] == '.') &&
1152                     (filedir_entry->d_name[1] == '.'))
1153                         continue;
1154
1155                 pch = strchr(filedir_entry->d_name, '@');
1156                 if (pch == NULL) /* no @ in name? consolidated file. */
1157                         continue;
1158
1159                 StrBufPlain(NextHop,
1160                             filedir_entry->d_name,
1161                             pch - filedir_entry->d_name);
1162
1163                 snprintf(filename,
1164                         sizeof filename,
1165                         "%s/%s",
1166                         ctdl_netout_dir,
1167                         filedir_entry->d_name
1168                 );
1169
1170                 i = CtdlIsValidNode(&nexthop,
1171                                     NULL,
1172                                     NextHop,
1173                                     working_ignetcfg,
1174                                     the_netmap);
1175
1176                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1177                         unlink(filename);
1178                 }
1179         }
1180         FreeStrBuf(&NextHop);
1181         free(d);
1182         closedir(dp);
1183 }
1184
1185 void free_spoolcontrol_struct(SpoolControl **sc)
1186 {
1187         free_spoolcontrol_struct_members(*sc);
1188         free(*sc);
1189         *sc = NULL;
1190 }
1191
1192 void free_spoolcontrol_struct_members(SpoolControl *sc)
1193 {
1194         int i;
1195         FreeStrBuf(&sc->RoomInfo);
1196         FreeStrBuf(&sc->ListID);
1197         for (i = 0; i < maxRoomNetCfg; i++)
1198                 FreeStrBuf(&sc->Users[i]);
1199 }
1200
1201
1202
1203 /*
1204  * It's ok if these directories already exist.  Just fail silently.
1205  */
1206 void create_spool_dirs(void) {
1207         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1208                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1209         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1210                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1211         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1212                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1213         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1214                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1215         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1216                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1217         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1218                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1219         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1220                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1221         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1222                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1223 }
1224
1225 /*
1226  * Module entry point
1227  */
1228 CTDL_MODULE_INIT(network_spool)
1229 {
1230         if (!threading)
1231         {
1232                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1233                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1234                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1235                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1236                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1237                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1238                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1239                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1240
1241                 create_spool_dirs();
1242 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1243         }
1244         return "network_spool";
1245 }