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) 2000-2012 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 *msg, 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
 110         QNM_syslog(LOG_DEBUG, "entering network_bounce()\n");
 111
 112         if (msg == NULL) return;
 113
 114         snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, config.c_nodename);
 115
 116         /*
 117          * Give it a fresh message ID
 118          */
 119         len = snprintf(buf, sizeof(buf),
 120                        "%ld.%04lx.%04x@%s",
 121                        (long)time(NULL),
 122                        (long)getpid(),
 123                        ++serialnum,
 124                        config.c_fqdn);
 125
 126         CM_SetField(msg, emessageId, buf, len);
 127
 128         /*
 129          * FIXME ... right now we're just sending a bounce; we really want to
 130          * include the text of the bounced message.
 131          */
 132         CM_SetField(msg, eMesageText, reason, strlen(reason));
 133         msg->cm_format_type = 0;
 134
 135         /*
 136          * Turn the message around
 137          */
 138         CM_FlushField(msg, eRecipient);
 139         CM_FlushField(msg, eDestination);
 140
 141         len = snprintf(recipient, sizeof(recipient), "%s@%s",
 142                        msg->cm_fields[eAuthor],
 143                        msg->cm_fields[eNodeName]);
 144
 145         CM_SetField(msg, eAuthor, HKEY(BOUNCESOURCE));
 146         CM_SetField(msg, eNodeName, CFG_KEY(c_nodename));
 147         CM_SetField(msg, eMsgSubject, HKEY("Delivery Status Notification (Failure)"));
 148
 149         Netmap_AddMe(msg, HKEY("unknown_user"));
 150
 151         /* Now submit the message */
 152         valid = validate_recipients(recipient, NULL, 0);
 153         if (valid != NULL) if (valid->num_error != 0) {
 154                 free_recipients(valid);
 155                 valid = NULL;
 156         }
 157         if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
 158                 strcpy(force_room, config.c_aideroom);
 159         }
 160         else {
 161                 strcpy(force_room, "");
 162         }
 163         if ( (valid == NULL) && IsEmptyStr(force_room) ) {
 164                 strcpy(force_room, config.c_aideroom);
 165         }
 166         CtdlSubmitMsg(msg, valid, force_room, 0);
 167
 168         /* Clean up */
 169         if (valid != NULL) free_recipients(valid);
 170         CM_Free(msg);
 171         QNM_syslog(LOG_DEBUG, "leaving network_bounce()\n");
 172 }
 173
 174
 175 void ParseLastSent(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 176 {
 177         RoomNetCfgLine *nptr;
 178         nptr = (RoomNetCfgLine *)
 179                 malloc(sizeof(RoomNetCfgLine));
 180         memset(nptr, 0, sizeof(RoomNetCfgLine));
 181         OneRNCFG->lastsent = extract_long(LinePos, 0);
 182         OneRNCFG->NetConfigs[ThisOne->C] = nptr;
 183 }
 184
 185 void ParseRoomAlias(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *rncfg)
 186 {
 187         if (rncfg->Sender != NULL)
 188                 return;
 189
 190         ParseGeneric(ThisOne, Line, LinePos, rncfg);
 191         rncfg->Sender = NewStrBufDup(rncfg->NetConfigs[roommailalias]->Value[0]);
 192 }
 193
 194 void ParseSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 195 {
 196         if (time(NULL) - extract_long(LinePos, 3) > EXP)
 197                 return; /* expired subscription... */
 198
 199         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 200 }
 201 void ParseUnSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 202 {
 203         if (time(NULL) - extract_long(LinePos, 2) > EXP)
 204                 return; /* expired subscription... */
 205
 206         ParseGeneric(ThisOne, Line, LinePos, OneRNCFG);
 207 }
 208
 209
 210 void SerializeLastSent(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *RNCfg, RoomNetCfgLine *data)
 211 {
 212         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 213         StrBufAppendPrintf(OutputBuffer, "|%ld\n", RNCfg->lastsent);
 214 }
 215
 216 void DeleteLastSent(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 217 {
 218         free(*data);
 219         *data = NULL;
 220 }
 221
 222 static const RoomNetCfg SpoolCfgs [4] = {
 223         listrecp,
 224         digestrecp,
 225         participate,
 226         ignet_push_share
 227 };
 228
 229 static const long SpoolCfgsCopyN [4] = {
 230         1, 1, 1, 2
 231 };
 232
 233 int HaveSpoolConfig(OneRoomNetCfg* RNCfg)
 234 {
 235         int i;
 236         int interested = 0;
 237         for (i=0; i < 4; i++) if (RNCfg->NetConfigs[SpoolCfgs[i]] == NULL) interested = 1;
 238         return interested;
 239 }
 240
 241 void Netmap_AddMe(struct CtdlMessage *msg, const char *defl, long defllen)
 242 {
 243         long node_len;
 244         char buf[SIZ];
 245
 246         /* prepend our node to the path */
 247         if (CM_IsEmpty(msg, eMessagePath)) {
 248                 CM_SetField(msg, eMessagePath, defl, defllen);
 249         }
 250         node_len = configlen.c_nodename;
 251         if (node_len >= SIZ)
 252                 node_len = SIZ - 1;
 253         memcpy(buf, config.c_nodename, node_len);
 254         buf[node_len] = '!';
 255         buf[node_len + 1] = '\0';
 256         CM_PrependToField(msg, eMessagePath, buf, node_len + 1);
 257 }
 258
 259 void InspectQueuedRoom(SpoolControl **pSC,
 260                        RoomProcList *room_to_spool,
 261                        HashList *working_ignetcfg,
 262                        HashList *the_netmap)
 263 {
 264         struct CitContext *CCC = CC;
 265         SpoolControl *sc;
 266         int i = 0;
 267
 268         sc = (SpoolControl*)malloc(sizeof(SpoolControl));
 269         memset(sc, 0, sizeof(SpoolControl));
 270         sc->RNCfg = room_to_spool->OneRNCfg;
 271         sc->lastsent = room_to_spool->lastsent;
 272         sc->working_ignetcfg = working_ignetcfg;
 273         sc->the_netmap = the_netmap;
 274
 275         /*
 276          * If the room doesn't exist, don't try to perform its networking tasks.
 277          * Normally this should never happen, but once in a while maybe a room gets
 278          * queued for networking and then deleted before it can happen.
 279          */
 280         if (CtdlGetRoom(&sc->room, room_to_spool->name) != 0) {
 281                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 282                 free(sc);
 283                 return;
 284         }
 285         if (sc->room.QRhighest <= sc->lastsent)
 286         {
 287                 QN_syslog(LOG_DEBUG, "nothing to do for <%s>\n", room_to_spool->name);
 288                 free(sc);
 289                 return;
 290         }
 291
 292         begin_critical_section(S_NETCONFIGS);
 293         if (sc->RNCfg == NULL)
 294                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 295
 296         if (!HaveSpoolConfig(sc->RNCfg))
 297         {
 298                 end_critical_section(S_NETCONFIGS);
 299                 free(sc);
 300                 /* nothing to do for this room... */
 301                 return;
 302         }
 303
 304         /* Now lets remember whats needed for the actual work... */
 305
 306         for (i=0; i < 4; i++)
 307         {
 308                 aggregate_recipients(&sc->Users[SpoolCfgs[i]],
 309                                      SpoolCfgs[i],
 310                                      sc->RNCfg,
 311                                      SpoolCfgsCopyN[i]);
 312         }
 313
 314         if (StrLength(sc->RNCfg->Sender) > 0)
 315                 sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
 316         end_critical_section(S_NETCONFIGS);
 317
 318         sc->next = *pSC;
 319         *pSC = sc;
 320
 321 }
 322
 323 void CalcListID(SpoolControl *sc)
 324 {
 325         StrBuf *RoomName;
 326         const char *err;
 327         int fd;
 328         struct CitContext *CCC = CC;
 329         char filename[PATH_MAX];
 330 #define MAX_LISTIDLENGTH 150
 331
 332         assoc_file_name(filename, sizeof filename, &sc->room, ctdl_info_dir);
 333         fd = open(filename, 0);
 334
 335         if (fd > 0) {
 336                 struct stat stbuf;
 337
 338                 if ((fstat(fd, &stbuf) == 0) &&
 339                     (stbuf.st_size > 0))
 340                 {
 341                         sc->RoomInfo = NewStrBufPlain(NULL, stbuf.st_size + 1);
 342                         StrBufReadBLOB(sc->RoomInfo, &fd, 0, stbuf.st_size, &err);
 343                 }
 344                 close(fd);
 345         }
 346
 347         sc->ListID = NewStrBufPlain(NULL, 1024);
 348         if (StrLength(sc->RoomInfo) > 0)
 349         {
 350                 const char *Pos = NULL;
 351                 StrBufSipLine(sc->ListID, sc->RoomInfo, &Pos);
 352
 353                 if (StrLength(sc->ListID) > MAX_LISTIDLENGTH)
 354                 {
 355                         StrBufCutAt(sc->ListID, MAX_LISTIDLENGTH, NULL);
 356                         StrBufAppendBufPlain(sc->ListID, HKEY("..."), 0);
 357                 }
 358                 StrBufAsciify(sc->ListID, ' ');
 359         }
 360         else
 361         {
 362                 StrBufAppendBufPlain(sc->ListID, CCC->room.QRname, -1, 0);
 363         }
 364
 365         StrBufAppendBufPlain(sc->ListID, HKEY("<"), 0);
 366         RoomName = NewStrBufPlain (sc->room.QRname, -1);
 367         StrBufAsciify(RoomName, '_');
 368         StrBufReplaceChars(RoomName, ' ', '_');
 369
 370         if (StrLength(sc->Users[roommailalias]) > 0)
 371         {
 372                 long Pos;
 373                 const char *AtPos;
 374
 375                 Pos = StrLength(sc->ListID);
 376                 StrBufAppendBuf(sc->ListID, sc->Users[roommailalias], 0);
 377                 AtPos = strchr(ChrPtr(sc->ListID) + Pos, '@');
 378
 379                 if (AtPos != NULL)
 380                 {
 381                         StrBufPeek(sc->ListID, AtPos, 0, '.');
 382                 }
 383         }
 384         else
 385         {
 386                 StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
 387                 StrBufAppendBuf(sc->ListID, RoomName, 0);
 388                 StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
 389                 StrBufAppendBufPlain(sc->ListID, config.c_fqdn, -1, 0);
 390                 /*
 391                  * this used to be:
 392                  * roomname <Room-Number.list-id.fqdn>
 393                  * according to rfc2919.txt it only has to be a uniq identifier
 394                  * under the domain of the system;
 395                  * in general MUAs use it to calculate the reply address nowadays.
 396                  */
 397         }
 398         StrBufAppendBufPlain(sc->ListID, HKEY(">"), 0);
 399
 400         if (StrLength(sc->Users[roommailalias]) == 0)
 401         {
 402                 sc->Users[roommailalias] = NewStrBuf();
 403
 404                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
 405                 StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
 406                 StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
 407                 StrBufAppendBufPlain(sc->Users[roommailalias], config.c_fqdn, -1, 0);
 408
 409                 StrBufLowerCase(sc->Users[roommailalias]);
 410         }
 411
 412         FreeStrBuf(&RoomName);
 413 }
 414
 415 static time_t last_digest_delivery = 0;
 416
 417 /*
 418  * Batch up and send all outbound traffic from the current room
 419  */
 420 void network_spoolout_room(SpoolControl *sc)
 421 {
 422         struct CitContext *CCC = CC;
 423         char buf[SIZ];
 424         int i;
 425         long lastsent;
 426
 427         /*
 428          * If the room doesn't exist, don't try to perform its networking tasks.
 429          * Normally this should never happen, but once in a while maybe a room gets
 430          * queued for networking and then deleted before it can happen.
 431          */
 432         memcpy (&CCC->room, &sc->room, sizeof(ctdlroom));
 433
 434         syslog(LOG_INFO, "Networking started for <%s>\n", CCC->room.QRname);
 435
 436         CalcListID(sc);
 437
 438         /* remember where we started... */
 439         lastsent = sc->lastsent;
 440
 441         /* Fetch the messages we ought to send & prepare them. */
 442         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 443                 network_spool_msg, sc);
 444
 445         if (StrLength(sc->Users[roommailalias]) > 0)
 446         {
 447                 long len;
 448                 len = StrLength(sc->Users[roommailalias]);
 449                 if (len + 1 > sizeof(buf))
 450                         len = sizeof(buf) - 1;
 451                 memcpy(buf, ChrPtr(sc->Users[roommailalias]), len);
 452                 buf[len] = '\0';
 453         }
 454         else
 455         {
 456                 snprintf(buf, sizeof buf, "room_%s@%s",
 457                          CCC->room.QRname, config.c_fqdn);
 458         }
 459
 460         for (i=0; buf[i]; ++i) {
 461                 buf[i] = tolower(buf[i]);
 462                 if (isspace(buf[i])) buf[i] = '_';
 463         }
 464
 465
 466         /* If we wrote a digest, deliver it and then close it */
 467         if (sc->Users[digestrecp] != NULL) {
 468                 time_t now = time(NULL);
 469                 time_t secs_today = now % (24 * 60 * 60);
 470                 long delta = 0;
 471
 472                 if (last_digest_delivery != 0) {
 473                         delta = now - last_digest_delivery;
 474                         delta = (24 * 60 * 60) - delta;
 475                 }
 476
 477                 if ((secs_today < 300) &&
 478                     (delta < 300))
 479                 {
 480                         if (sc->digestfp == NULL) {
 481                                 sc->digestfp = create_digest_file(&sc->room, 0);
 482                         }
 483                         if (sc->digestfp != NULL) {
 484                                 last_digest_delivery = now;
 485                                 fprintf(sc->digestfp,
 486                                         " -----------------------------------"
 487                                         "------------------------------------"
 488                                         "-------\n"
 489                                         "You are subscribed to the '%s' "
 490                                         "list.\n"
 491                                         "To post to the list: %s\n",
 492                                         CCC->room.QRname, buf
 493                                         );
 494                                 network_deliver_digest(sc);     /* deliver */
 495                                 remove_digest_file(&sc->room);
 496                         }
 497                 }
 498         }
 499         if (sc->digestfp != NULL) {
 500                 fclose(sc->digestfp);
 501                 sc->digestfp = NULL;
 502         }
 503
 504         /* Now rewrite the config file */
 505         if (sc->lastsent != lastsent)
 506         {
 507                 begin_critical_section(S_NETCONFIGS);
 508                 sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 509
 510                 sc->RNCfg->lastsent = sc->lastsent;
 511                 sc->RNCfg->changed = 1;
 512                 end_critical_section(S_NETCONFIGS);
 513         }
 514 }
 515
 516
 517 /*
 518  * Check the use table.  This is a list of messages which have recently
 519  * arrived on the system.  It is maintained and queried to prevent the same
 520  * message from being entered into the database multiple times if it happens
 521  * to arrive multiple times by accident.
 522  */
 523 int network_usetable(struct CtdlMessage *msg)
 524 {
 525         StrBuf *msgid;
 526         struct CitContext *CCC = CC;
 527         time_t now;
 528
 529         /* Bail out if we can't generate a message ID */
 530         if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
 531         {
 532                 return(0);
 533         }
 534
 535         /* Generate the message ID */
 536         msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
 537         if (haschar(ChrPtr(msgid), '@') == 0) {
 538                 StrBufAppendBufPlain(msgid, HKEY("@"), 0);
 539                 if (!CM_IsEmpty(msg, eNodeName)) {
 540                         StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
 541                 }
 542                 else {
 543                         FreeStrBuf(&msgid);
 544                         return(0);
 545                 }
 546         }
 547         now = time(NULL);
 548         if (CheckIfAlreadySeen("Networker Import",
 549                                msgid,
 550                                now, 0,
 551                                eCheckUpdate,
 552                                CCC->cs_pid, 0) != 0)
 553         {
 554                 FreeStrBuf(&msgid);
 555                 return(1);
 556         }
 557         FreeStrBuf(&msgid);
 558
 559         return(0);
 560 }
 561
 562
 563 /*
 564  * Process a buffer containing a single message from a single file
 565  * from the inbound queue
 566  */
 567 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 568 {
 569         long len;
 570         struct CitContext *CCC = CC;
 571         StrBuf *Buf = NULL;
 572         struct CtdlMessage *msg = NULL;
 573         long pos;
 574         int field;
 575         recptypes *recp = NULL;
 576         char target_room[ROOMNAMELEN];
 577         struct ser_ret sermsg;
 578         char filename[PATH_MAX];
 579         FILE *fp;
 580         const StrBuf *nexthop = NULL;
 581         unsigned char firstbyte;
 582         unsigned char lastbyte;
 583
 584         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 585
 586         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 587         firstbyte = buffer[0];
 588         lastbyte = buffer[size-1];
 589         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 590                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 591                           size, firstbyte, lastbyte);
 592                 return;
 593         }
 594
 595         /* Set default target room to trash */
 596         strcpy(target_room, TWITROOM);
 597
 598         /* Load the message into memory */
 599         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 600         memset(msg, 0, sizeof(struct CtdlMessage));
 601         msg->cm_magic = CTDLMESSAGE_MAGIC;
 602         msg->cm_anon_type = buffer[1];
 603         msg->cm_format_type = buffer[2];
 604
 605         for (pos = 3; pos < size; ++pos) {
 606                 field = buffer[pos];
 607                 len = strlen(buffer + pos + 1);
 608                 CM_SetField(msg, field, buffer + pos + 1, len);
 609                 pos = pos + len + 1;
 610         }
 611
 612         /* Check for message routing */
 613         if (!CM_IsEmpty(msg, eDestination)) {
 614                 if (strcasecmp(msg->cm_fields[eDestination], config.c_nodename)) {
 615
 616                         /* route the message */
 617                         Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
 618                         if (CtdlIsValidNode(&nexthop,
 619                                             NULL,
 620                                             Buf,
 621                                             working_ignetcfg,
 622                                             the_netmap) == 0)
 623                         {
 624                                 Netmap_AddMe(msg, HKEY("unknown_user"));
 625
 626                                 /* serialize the message */
 627                                 CtdlSerializeMessage(&sermsg, msg);
 628
 629                                 /* now send it */
 630                                 if (StrLength(nexthop) == 0) {
 631                                         nexthop = Buf;
 632                                 }
 633                                 snprintf(filename,
 634                                          sizeof filename,
 635                                          "%s/%s@%lx%x",
 636                                          ctdl_netout_dir,
 637                                          ChrPtr(nexthop),
 638                                          time(NULL),
 639                                          rand()
 640                                 );
 641                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 642                                 fp = fopen(filename, "ab");
 643                                 if (fp != NULL) {
 644                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 645                                         fclose(fp);
 646                                 }
 647                                 else {
 648                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 649                                 }
 650                                 free(sermsg.ser);
 651                                 CM_Free(msg);
 652                                 FreeStrBuf(&Buf);
 653                                 return;
 654                         }
 655
 656                         else {  /* invalid destination node name */
 657                                 FreeStrBuf(&Buf);
 658
 659                                 network_bounce(msg,
 660 "A message you sent could not be delivered due to an invalid destination node"
 661 " name.  Please check the address and try sending the message again.\n");
 662                                 msg = NULL;
 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                         msg = NULL;
 703                         free_recipients(recp);
 704                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 705                         return;
 706                 }
 707                 strcpy(target_room, "");        /* no target room if mail */
 708         }
 709
 710         /* Our last shot at finding a home for this message is to see if
 711          * it has the eOriginalRoom (O) field (Originating room) set.
 712          */
 713         else if (!CM_IsEmpty(msg, eOriginalRoom)) {
 714                 safestrncpy(target_room, msg->cm_fields[eOriginalRoom], sizeof target_room);
 715         }
 716
 717         /* Strip out fields that are only relevant during transit */
 718         CM_FlushField(msg, eDestination);
 719         CM_FlushField(msg, eRemoteRoom);
 720
 721         /* save the message into a room */
 722         if (PerformNetprocHooks(msg, target_room) == 0) {
 723                 msg->cm_flags = CM_SKIP_HOOKS;
 724                 CtdlSubmitMsg(msg, recp, target_room, 0);
 725         }
 726         CM_Free(msg);
 727         free_recipients(recp);
 728 }
 729
 730
 731 /*
 732  * Process a single message from a single file from the inbound queue
 733  */
 734 void network_process_message(FILE *fp,
 735                              long msgstart,
 736                              long msgend,
 737                              HashList *working_ignetcfg,
 738                              HashList *the_netmap,
 739                              int *netmap_changed)
 740 {
 741         long hold_pos;
 742         long size;
 743         char *buffer;
 744
 745         hold_pos = ftell(fp);
 746         size = msgend - msgstart + 1;
 747         buffer = malloc(size);
 748         if (buffer != NULL) {
 749                 fseek(fp, msgstart, SEEK_SET);
 750                 if (fread(buffer, size, 1, fp) > 0) {
 751                         network_process_buffer(buffer,
 752                                                size,
 753                                                working_ignetcfg,
 754                                                the_netmap,
 755                                                netmap_changed);
 756                 }
 757                 free(buffer);
 758         }
 759
 760         fseek(fp, hold_pos, SEEK_SET);
 761 }
 762
 763
 764 /*
 765  * Process a single file from the inbound queue
 766  */
 767 void network_process_file(char *filename,
 768                           HashList *working_ignetcfg,
 769                           HashList *the_netmap,
 770                           int *netmap_changed)
 771 {
 772         struct CitContext *CCC = CC;
 773         FILE *fp;
 774         long msgstart = (-1L);
 775         long msgend = (-1L);
 776         long msgcur = 0L;
 777         int ch;
 778         int nMessages = 0;
 779
 780         fp = fopen(filename, "rb");
 781         if (fp == NULL) {
 782                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 783                 return;
 784         }
 785
 786         fseek(fp, 0L, SEEK_END);
 787         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 788         rewind(fp);
 789
 790         /* Look for messages in the data stream and break them out */
 791         while (ch = getc(fp), ch >= 0) {
 792
 793                 if (ch == 255) {
 794                         if (msgstart >= 0L) {
 795                                 msgend = msgcur - 1;
 796                                 network_process_message(fp,
 797                                                         msgstart,
 798                                                         msgend,
 799                                                         working_ignetcfg,
 800                                                         the_netmap,
 801                                                         netmap_changed);
 802                         }
 803                         msgstart = msgcur;
 804                 }
 805
 806                 ++msgcur;
 807                 nMessages ++;
 808         }
 809
 810         msgend = msgcur - 1;
 811         if (msgstart >= 0L) {
 812                 network_process_message(fp,
 813                                         msgstart,
 814                                         msgend,
 815                                         working_ignetcfg,
 816                                         the_netmap,
 817                                         netmap_changed);
 818                 nMessages ++;
 819         }
 820
 821         if (nMessages > 0)
 822                 QN_syslog(LOG_INFO,
 823                           "network: processed %d messages in %s\n",
 824                           nMessages,
 825                           filename);
 826
 827         fclose(fp);
 828         unlink(filename);
 829 }
 830
 831
 832 /*
 833  * Process anything in the inbound queue
 834  */
 835 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 836 {
 837         struct CitContext *CCC = CC;
 838         DIR *dp;
 839         struct dirent *d;
 840         struct dirent *filedir_entry;
 841         struct stat statbuf;
 842         char filename[PATH_MAX];
 843         static time_t last_spoolin_mtime = 0L;
 844         int d_type = 0;
 845         int d_namelen;
 846
 847         /*
 848          * Check the spoolin directory's modification time.  If it hasn't
 849          * been touched, we don't need to scan it.
 850          */
 851         if (stat(ctdl_netin_dir, &statbuf)) return;
 852         if (statbuf.st_mtime == last_spoolin_mtime) {
 853                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 854                 return;
 855         }
 856         last_spoolin_mtime = statbuf.st_mtime;
 857         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 858
 859         /*
 860          * Ok, there's something interesting in there, so scan it.
 861          */
 862         dp = opendir(ctdl_netin_dir);
 863         if (dp == NULL) return;
 864
 865         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 866         if (d == NULL) {
 867                 closedir(dp);
 868                 return;
 869         }
 870
 871         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 872                (filedir_entry != NULL))
 873         {
 874 #ifdef _DIRENT_HAVE_D_NAMLEN
 875                 d_namelen = filedir_entry->d_namlen;
 876
 877 #else
 878                 d_namelen = strlen(filedir_entry->d_name);
 879 #endif
 880
 881 #ifdef _DIRENT_HAVE_D_TYPE
 882                 d_type = filedir_entry->d_type;
 883 #else
 884                 d_type = DT_UNKNOWN;
 885 #endif
 886                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 887                         continue; /* Ignore backup files... */
 888
 889                 if ((d_namelen == 1) &&
 890                     (filedir_entry->d_name[0] == '.'))
 891                         continue;
 892
 893                 if ((d_namelen == 2) &&
 894                     (filedir_entry->d_name[0] == '.') &&
 895                     (filedir_entry->d_name[1] == '.'))
 896                         continue;
 897
 898                 if (d_type == DT_UNKNOWN) {
 899                         struct stat s;
 900                         char path[PATH_MAX];
 901
 902                         snprintf(path,
 903                                  PATH_MAX,
 904                                  "%s/%s",
 905                                  ctdl_netin_dir,
 906                                  filedir_entry->d_name);
 907
 908                         if (lstat(path, &s) == 0) {
 909                                 d_type = IFTODT(s.st_mode);
 910                         }
 911                 }
 912
 913                 switch (d_type)
 914                 {
 915                 case DT_DIR:
 916                         break;
 917                 case DT_LNK: /* TODO: check whether its a file or a directory */
 918                 case DT_REG:
 919                         snprintf(filename,
 920                                 sizeof filename,
 921                                 "%s/%s",
 922                                 ctdl_netin_dir,
 923                                 d->d_name
 924                         );
 925                         network_process_file(filename,
 926                                              working_ignetcfg,
 927                                              the_netmap,
 928                                              netmap_changed);
 929                 }
 930         }
 931
 932         closedir(dp);
 933         free(d);
 934 }
 935
 936 /*
 937  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 938  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 939  */
 940 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 941 {
 942         struct CitContext *CCC = CC;
 943         IOBuffer IOB;
 944         FDIOBuffer FDIO;
 945         int d_namelen;
 946         DIR *dp;
 947         struct dirent *d;
 948         struct dirent *filedir_entry;
 949         const char *pch;
 950         char spooloutfilename[PATH_MAX];
 951         char filename[PATH_MAX];
 952         const StrBuf *nexthop;
 953         StrBuf *NextHop;
 954         int i;
 955         struct stat statbuf;
 956         int nFailed = 0;
 957         int d_type = 0;
 958
 959
 960         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 961         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 962         if (d == NULL)  return;
 963
 964         dp = opendir(ctdl_netout_dir);
 965         if (dp == NULL) {
 966                 free(d);
 967                 return;
 968         }
 969
 970         NextHop = NewStrBuf();
 971         memset(&IOB, 0, sizeof(IOBuffer));
 972         memset(&FDIO, 0, sizeof(FDIOBuffer));
 973         FDIO.IOB = &IOB;
 974
 975         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 976                (filedir_entry != NULL))
 977         {
 978 #ifdef _DIRENT_HAVE_D_NAMLEN
 979                 d_namelen = filedir_entry->d_namlen;
 980
 981 #else
 982                 d_namelen = strlen(filedir_entry->d_name);
 983 #endif
 984
 985 #ifdef _DIRENT_HAVE_D_TYPE
 986                 d_type = filedir_entry->d_type;
 987 #else
 988                 d_type = DT_UNKNOWN;
 989 #endif
 990                 if (d_type == DT_DIR)
 991                         continue;
 992
 993                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 994                         continue; /* Ignore backup files... */
 995
 996                 if ((d_namelen == 1) &&
 997                     (filedir_entry->d_name[0] == '.'))
 998                         continue;
 999
1000                 if ((d_namelen == 2) &&
1001                     (filedir_entry->d_name[0] == '.') &&
1002                     (filedir_entry->d_name[1] == '.'))
1003                         continue;
1004
1005                 pch = strchr(filedir_entry->d_name, '@');
1006                 if (pch == NULL)
1007                         continue;
1008
1009                 snprintf(filename,
1010                          sizeof filename,
1011                          "%s/%s",
1012                          ctdl_netout_dir,
1013                          filedir_entry->d_name);
1014
1015                 StrBufPlain(NextHop,
1016                             filedir_entry->d_name,
1017                             pch - filedir_entry->d_name);
1018
1019                 snprintf(spooloutfilename,
1020                          sizeof spooloutfilename,
1021                          "%s/%s",
1022                          ctdl_netout_dir,
1023                          ChrPtr(NextHop));
1024
1025                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
1026                 if (CtdlNetworkTalkingTo(SKEY(NextHop), NTT_CHECK)) {
1027                         nFailed++;
1028                         QN_syslog(LOG_DEBUG,
1029                                   "Currently online with %s - skipping for now\n",
1030                                   ChrPtr(NextHop)
1031                                 );
1032                 }
1033                 else {
1034                         size_t dsize;
1035                         size_t fsize;
1036                         int infd, outfd;
1037                         const char *err = NULL;
1038                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_ADD);
1039
1040                         infd = open(filename, O_RDONLY);
1041                         if (infd == -1) {
1042                                 nFailed++;
1043                                 QN_syslog(LOG_ERR,
1044                                           "failed to open %s for reading due to %s; skipping.\n",
1045                                           filename, strerror(errno)
1046                                         );
1047                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1048                                 continue;
1049                         }
1050
1051                         outfd = open(spooloutfilename,
1052                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1053                                   S_IRUSR|S_IWUSR);
1054                         if (outfd == -1)
1055                         {
1056                                 outfd = open(spooloutfilename,
1057                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1058                                              S_IRUSR | S_IWUSR);
1059                         }
1060                         if (outfd == -1) {
1061                                 nFailed++;
1062                                 QN_syslog(LOG_ERR,
1063                                           "failed to open %s for reading due to %s; skipping.\n",
1064                                           spooloutfilename, strerror(errno)
1065                                         );
1066                                 close(infd);
1067                                 CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1068                                 continue;
1069                         }
1070
1071                         dsize = lseek(outfd, 0, SEEK_END);
1072                         lseek(outfd, -dsize, SEEK_SET);
1073
1074                         fstat(infd, &statbuf);
1075                         fsize = statbuf.st_size;
1076 /*
1077                         fsize = lseek(infd, 0, SEEK_END);
1078 */
1079                         IOB.fd = infd;
1080                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1081                         FDIO.ChunkSendRemain = fsize;
1082                         FDIO.TotalSentAlready = dsize;
1083                         err = NULL;
1084                         errno = 0;
1085                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1086                         if (err == NULL) {
1087                                 unlink(filename);
1088                                 QN_syslog(LOG_DEBUG,
1089                                           "Spoolfile %s now "SIZE_T_FMT" k\n",
1090                                           spooloutfilename,
1091                                           (dsize + fsize)/1024
1092                                         );
1093                         }
1094                         else {
1095                                 nFailed++;
1096                                 QN_syslog(LOG_ERR,
1097                                           "failed to append to %s [%s]; rolling back..\n",
1098                                           spooloutfilename, strerror(errno)
1099                                         );
1100                                 /* whoops partial append?? truncate spooloutfilename again! */
1101                                 ftruncate(outfd, dsize);
1102                         }
1103                         FDIOBufferDelete(&FDIO);
1104                         close(infd);
1105                         close(outfd);
1106                         CtdlNetworkTalkingTo(SKEY(NextHop), NTT_REMOVE);
1107                 }
1108         }
1109         closedir(dp);
1110
1111         if (nFailed > 0) {
1112                 FreeStrBuf(&NextHop);
1113                 QN_syslog(LOG_INFO,
1114                           "skipping Spoolcleanup because of %d files unprocessed.\n",
1115                           nFailed
1116                         );
1117
1118                 return;
1119         }
1120
1121         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1122         dp = opendir(ctdl_netout_dir);
1123         if (dp == NULL) {
1124                 FreeStrBuf(&NextHop);
1125                 free(d);
1126                 return;
1127         }
1128
1129         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1130                (filedir_entry != NULL))
1131         {
1132 #ifdef _DIRENT_HAVE_D_NAMLEN
1133                 d_namelen = filedir_entry->d_namlen;
1134
1135 #else
1136                 d_namelen = strlen(filedir_entry->d_name);
1137 #endif
1138
1139 #ifdef _DIRENT_HAVE_D_TYPE
1140                 d_type = filedir_entry->d_type;
1141 #else
1142                 d_type = DT_UNKNOWN;
1143 #endif
1144                 if (d_type == DT_DIR)
1145                         continue;
1146
1147                 if ((d_namelen == 1) &&
1148                     (filedir_entry->d_name[0] == '.'))
1149                         continue;
1150
1151                 if ((d_namelen == 2) &&
1152                     (filedir_entry->d_name[0] == '.') &&
1153                     (filedir_entry->d_name[1] == '.'))
1154                         continue;
1155
1156                 pch = strchr(filedir_entry->d_name, '@');
1157                 if (pch == NULL) /* no @ in name? consolidated file. */
1158                         continue;
1159
1160                 StrBufPlain(NextHop,
1161                             filedir_entry->d_name,
1162                             pch - filedir_entry->d_name);
1163
1164                 snprintf(filename,
1165                         sizeof filename,
1166                         "%s/%s",
1167                         ctdl_netout_dir,
1168                         filedir_entry->d_name
1169                 );
1170
1171                 i = CtdlIsValidNode(&nexthop,
1172                                     NULL,
1173                                     NextHop,
1174                                     working_ignetcfg,
1175                                     the_netmap);
1176
1177                 if ( (i != 0) || (StrLength(nexthop) > 0) ) {
1178                         unlink(filename);
1179                 }
1180         }
1181         FreeStrBuf(&NextHop);
1182         free(d);
1183         closedir(dp);
1184 }
1185
1186 void free_spoolcontrol_struct(SpoolControl **sc)
1187 {
1188         free_spoolcontrol_struct_members(*sc);
1189         free(*sc);
1190         *sc = NULL;
1191 }
1192
1193 void free_spoolcontrol_struct_members(SpoolControl *sc)
1194 {
1195         int i;
1196         FreeStrBuf(&sc->RoomInfo);
1197         FreeStrBuf(&sc->ListID);
1198         for (i = 0; i < maxRoomNetCfg; i++)
1199                 FreeStrBuf(&sc->Users[i]);
1200 }
1201
1202
1203
1204 /*
1205  * It's ok if these directories already exist.  Just fail silently.
1206  */
1207 void create_spool_dirs(void) {
1208         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1209                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1210         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1211                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1212         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1213                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1214         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1215                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1216         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1217                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1218         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1219                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1220         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1221                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1222         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1223                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1224 }
1225
1226 /*
1227  * Module entry point
1228  */
1229 CTDL_MODULE_INIT(network_spool)
1230 {
1231         if (!threading)
1232         {
1233                 CtdlREGISTERRoomCfgType(subpending,       ParseSubPendingLine,   0, 5, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1234                 CtdlREGISTERRoomCfgType(unsubpending,     ParseUnSubPendingLine, 0, 4, SerializeGeneric,  DeleteGenericCfgLine); /// todo: move this to mailinglist manager
1235                 CtdlREGISTERRoomCfgType(lastsent,         ParseLastSent,         1, 1, SerializeLastSent, DeleteLastSent);
1236                 CtdlREGISTERRoomCfgType(ignet_push_share, ParseGeneric,          0, 2, SerializeGeneric,  DeleteGenericCfgLine); // [remotenode|remoteroomname (optional)]// todo: move this to the ignet client
1237                 CtdlREGISTERRoomCfgType(listrecp,         ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1238                 CtdlREGISTERRoomCfgType(digestrecp,       ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1239                 CtdlREGISTERRoomCfgType(participate,      ParseGeneric,          0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1240                 CtdlREGISTERRoomCfgType(roommailalias,    ParseRoomAlias,        0, 1, SerializeGeneric,  DeleteGenericCfgLine);
1241
1242                 create_spool_dirs();
1243 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1244         }
1245         return "network_spool";
1246 }