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 "file_ops.h"
  76 #include "citadel_dirs.h"
  77 #include "threads.h"
  78 #include "context.h"
  79 #include "netconfig.h"
  80 #include "netspool.h"
  81 #include "netmail.h"
  82 #include "ctdl_module.h"
  83
  84
  85 HashList *CfgTypeHash = NULL;
  86 typedef struct CfgLineType CfgLineType;
  87 typedef void (*CfgLineParser)(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc);
  88 typedef void (*CfgLineSerializer)(const CfgLineType *ThisOne, StrBuf *OuptputBuffer, SpoolControl *sc, namelist *data);
  89 typedef void (*CfgLineDeAllocator)(const CfgLineType *ThisOne, namelist **data);
  90 struct CfgLineType {
  91         RoomNetCfg C;
  92         CfgLineParser Parser;
  93         CfgLineSerializer Serializer;
  94         CfgLineDeAllocator DeAllocator;
  95         ConstStr Str;
  96         int IsSingleLine;
  97 };
  98 #define REGISTERRoomCfgType(a, p, uniq, s, d) RegisterRoomCfgType(#a, sizeof(#a) - 1, a, p, uniq, s, d);
  99
 100 void RegisterRoomCfgType(const char* Name, long len, RoomNetCfg eCfg, CfgLineParser p, int uniq, CfgLineSerializer s, CfgLineDeAllocator d)
 101 {
 102         CfgLineType *pCfg;
 103
 104         pCfg = (CfgLineType*) malloc(sizeof(CfgLineType));
 105         pCfg->Parser = p;
 106         pCfg->Serializer = s;
 107         pCfg->C = eCfg;
 108         pCfg->Str.Key = Name;
 109         pCfg->Str.len = len;
 110         pCfg->IsSingleLine = uniq;
 111
 112         if (CfgTypeHash == NULL)
 113                 CfgTypeHash = NewHash(1, NULL);
 114         Put(CfgTypeHash, Name, len, pCfg, NULL);
 115 }
 116
 117 const CfgLineType *GetCfgTypeByStr(const char *Key, long len)
 118 {
 119         void *pv;
 120
 121         if (GetHash(CfgTypeHash, Key, len, &pv) && (pv != NULL))
 122         {
 123                 return (const CfgLineType *) pv;
 124         }
 125         else
 126         {
 127                 return NULL;
 128         }
 129 }
 130
 131 const CfgLineType *GetCfgTypeByEnum(RoomNetCfg eCfg, HashPos *It)
 132 {
 133         const char *Key;
 134         long len;
 135         void *pv;
 136         CfgLineType *pCfg;
 137
 138         RewindHashPos(CfgTypeHash, It, 1);
 139         while (GetNextHashPos(CfgTypeHash, It, &len, &Key, &pv) && (pv != NULL))
 140         {
 141                 pCfg = (CfgLineType*) pv;
 142                 if (pCfg->C == eCfg)
 143                         return pCfg;
 144         }
 145         return NULL;
 146 }
 147 void ParseDefault(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc)
 148 {
 149         namelist *nptr;
 150
 151         nptr = (namelist *)
 152                 malloc(sizeof(namelist));
 153         nptr->next = sc->NetConfigs[ThisOne->C];
 154         nptr->Value = NewStrBufPlain(LinePos, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 155         sc->NetConfigs[ThisOne->C] = nptr;
 156 }
 157
 158 void ParseLastSent(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc)
 159 {
 160         sc->lastsent = extract_long(LinePos, 0);
 161 }
 162 void ParseIgnetPushShare(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc)
 163 {
 164 /*
 165         extract_token(nodename, LinePos, 0, '|', sizeof nodename);
 166         extract_token(roomname, LinePos, 1, '|', sizeof roomname);
 167         mptr = (maplist *) malloc(sizeof(maplist));
 168         mptr->next = sc->ignet_push_shares;
 169         strcpy(mptr->remote_nodename, nodename);
 170         strcpy(mptr->remote_roomname, roomname);
 171         sc->ignet_push_shares = mptr;
 172 */
 173 }
 174
 175 void ParseRoomAlias(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc)
 176 {
 177 /*
 178         if (sc->sender != NULL)
 179                 continue; / * just one alowed... * /
 180         extract_token(nptr->name, buf, 1, '|', sizeof nptr->name);
 181         sc->sender = nptr;
 182 */
 183 }
 184
 185 void ParseSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc)
 186 {
 187
 188         if (time(NULL) - extract_long(LinePos, 3) > EXP) {
 189                 //      skipthisline = 1;
 190         }
 191         else
 192         {
 193         }
 194
 195 }
 196 void ParseUnSubPendingLine(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, SpoolControl *sc)
 197 {
 198         ///int skipthisline = 0;
 199         if (time(NULL) - extract_long(LinePos, 2) > EXP) {
 200                 //      skipthisline = 1;
 201         }
 202
 203 }
 204
 205 void DeleteGenericCfgLine(const CfgLineType *ThisOne, namelist **data)
 206 {
 207         FreeStrBuf(&(*data)->Value);
 208         free(*data);
 209         *data = NULL;
 210 }
 211 int read_spoolcontrol_file(SpoolControl **scc, char *filename)
 212 {
 213         int fd;
 214         const char *ErrStr = NULL;
 215         const char *Pos;
 216         const CfgLineType *pCfg;
 217         StrBuf *Line;
 218         StrBuf *InStr;
 219         SpoolControl *sc;
 220
 221         fd = open(filename, O_NONBLOCK|O_RDONLY);
 222         if (fd == -1) {
 223                 *scc = NULL;
 224                 return 0;
 225         }
 226         sc = malloc(sizeof(SpoolControl));
 227         memset(sc, 0, sizeof(SpoolControl));
 228         *scc = sc;
 229
 230         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 231                 if (StrLength(Line) == 0)
 232                         continue;
 233                 Pos = NULL;
 234                 InStr = NewStrBufPlain(NULL, StrLength(Line));
 235                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 236
 237                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 238                 if (pCfg != NULL)
 239                 {
 240                         pCfg->Parser(pCfg, Line, Pos, sc);
 241                 }
 242                 else
 243                 {
 244                         if (sc->misc == NULL)
 245                         {
 246                                 sc->misc = NewStrBufDup(Line);
 247                         }
 248                         else
 249                         {
 250                                 if(StrLength(sc->misc) > 0)
 251                                         StrBufAppendBufPlain(sc->misc, HKEY("\n"), 0);
 252                                 StrBufAppendBuf(sc->misc, Line, 0);
 253                         }
 254                 }
 255         }
 256         if (fd > 0)
 257                 close(fd);
 258         FreeStrBuf(&InStr);
 259         FreeStrBuf(&Line);
 260         return 1;
 261 }
 262
 263 void SerializeLastSent(const CfgLineType *ThisOne, StrBuf *OutputBuffer, SpoolControl *sc, namelist *data)
 264 {
 265         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 266         StrBufAppendPrintf(OutputBuffer, "|%ld\n", sc->lastsent);
 267 }
 268
 269 void SerializeGeneric(const CfgLineType *ThisOne, StrBuf *OutputBuffer, SpoolControl *sc, namelist *data)
 270 {
 271         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 272         StrBufAppendBuf(OutputBuffer, data->Value, 0);
 273         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 274 }
 275 void SerializeIgnetPushShare(const CfgLineType *ThisOne, StrBuf *OutputBuffer, SpoolControl *sc, namelist *data)
 276 {
 277         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 278 /*
 279                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
 280                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
 281                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
 282                         }
 283                         StrBufAppendPrintf(Cfg, "\n");
 284                         mptr = sc->ignet_push_shares->next;
 285                         free(sc->ignet_push_shares);
 286                         sc->ignet_push_shares = mptr;
 287 */
 288         StrBufAppendBuf(OutputBuffer, data->Value, 0);
 289         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 290 }
 291
 292 int save_spoolcontrol_file(SpoolControl *sc, char *filename)
 293 {
 294         RoomNetCfg eCfg;
 295         StrBuf *Cfg;
 296         char tempfilename[PATH_MAX];
 297         int TmpFD;
 298         long len;
 299         time_t unixtime;
 300         struct timeval tv;
 301         long reltid; /* if we don't have SYS_gettid, use "random" value */
 302         StrBuf *OutBuffer;
 303         int rc;
 304         HashPos *CfgIt;
 305
 306         len = strlen(filename);
 307         memcpy(tempfilename, filename, len + 1);
 308
 309
 310 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 311         reltid = syscall(SYS_gettid);
 312 #endif
 313         gettimeofday(&tv, NULL);
 314         /* Promote to time_t; types differ on some OSes (like darwin) */
 315         unixtime = tv.tv_sec;
 316
 317         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 318         errno = 0;
 319         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 320         Cfg = NewStrBuf();
 321         if ((TmpFD < 0) || (errno != 0)) {
 322                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 323                         filename, strerror(errno));
 324                 unlink(tempfilename);
 325                 return 0;
 326         }
 327         else {
 328                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 329                 fchown(TmpFD, config.c_ctdluid, 0);
 330                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 331                 {
 332                         const CfgLineType *pCfg;
 333                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 334                         if (pCfg->IsSingleLine)
 335                         {
 336                                 pCfg->Serializer(pCfg, OutBuffer, sc, NULL);
 337                         }
 338                         else
 339                         {
 340                                 namelist *pName = sc->NetConfigs[pCfg->C];
 341                                 while (pName != NULL)
 342                                 {
 343                                         pCfg->Serializer(pCfg, OutBuffer, sc, pName);
 344                                         pName = pName->next;
 345                                 }
 346
 347
 348                         }
 349
 350                 }
 351                 DeleteHashPos(&CfgIt);
 352
 353
 354                 if (sc->misc != NULL) {
 355                         StrBufAppendBuf(OutBuffer, sc->misc, 0);
 356                 }
 357
 358                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 359                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
 360                 {
 361                         close(TmpFD);
 362                         rename(tempfilename, filename);
 363                         rc = 1;
 364                 }
 365                 else {
 366                         syslog(LOG_EMERG,
 367                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 368                                       tempfilename,
 369                                       strerror(errno));
 370                         close(TmpFD);
 371                         unlink(tempfilename);
 372                         rc = 0;
 373                 }
 374                 FreeStrBuf(&OutBuffer);
 375
 376         }
 377         return rc;
 378 }
 379
 380
 381
 382 void free_spoolcontrol_struct(SpoolControl **scc)
 383 {
 384         RoomNetCfg eCfg;
 385         HashPos *CfgIt;
 386         SpoolControl *sc;
 387
 388         sc = *scc;
 389         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 390         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 391         {
 392                 const CfgLineType *pCfg;
 393                 namelist *pNext, *pName;
 394
 395                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 396                 pName= sc->NetConfigs[pCfg->C];
 397                 while (pName != NULL)
 398                 {
 399                         pNext = pName->next;
 400                         pCfg->DeAllocator(pCfg, &pName);
 401                         pName = pNext;
 402                 }
 403         }
 404         DeleteHashPos(&CfgIt);
 405
 406         FreeStrBuf(&sc->Sender);
 407         FreeStrBuf(&sc->RoomInfo);
 408         FreeStrBuf(&sc->misc);
 409         free(sc);
 410         *scc=NULL;
 411 }
 412
 413 #if 0
 414 int writenfree_spoolcontrol_file(SpoolControl **scc, char *filename)
 415 {
 416         char tempfilename[PATH_MAX];
 417         int TmpFD;
 418         SpoolControl *sc;
 419         namelist *nptr = NULL;
 420         maplist *mptr = NULL;
 421         long len;
 422         time_t unixtime;
 423         struct timeval tv;
 424         long reltid; /* if we don't have SYS_gettid, use "random" value */
 425         StrBuf *Cfg;
 426         int rc;
 427
 428         len = strlen(filename);
 429         memcpy(tempfilename, filename, len + 1);
 430
 431
 432 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 433         reltid = syscall(SYS_gettid);
 434 #endif
 435         gettimeofday(&tv, NULL);
 436         /* Promote to time_t; types differ on some OSes (like darwin) */
 437         unixtime = tv.tv_sec;
 438
 439         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 440         sc = *scc;
 441         errno = 0;
 442         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 443         Cfg = NewStrBuf();
 444         if ((TmpFD < 0) || (errno != 0)) {
 445                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 446                         filename, strerror(errno));
 447                 free_spoolcontrol_struct(scc);
 448                 unlink(tempfilename);
 449         }
 450         else {
 451                 fchown(TmpFD, config.c_ctdluid, 0);
 452                 StrBufAppendPrintf(Cfg, "lastsent|%ld\n", sc->lastsent);
 453
 454                 /* Write out the listrecps while freeing from memory at the
 455                  * same time.  Am I clever or what?  :)
 456                  */
 457                 while (sc->listrecps != NULL) {
 458                     StrBufAppendPrintf(Cfg, "listrecp|%s\n", sc->listrecps->name);
 459                         nptr = sc->listrecps->next;
 460                         free(sc->listrecps);
 461                         sc->listrecps = nptr;
 462                 }
 463                 /* Do the same for digestrecps */
 464                 while (sc->digestrecps != NULL) {
 465                         StrBufAppendPrintf(Cfg, "digestrecp|%s\n", sc->digestrecps->name);
 466                         nptr = sc->digestrecps->next;
 467                         free(sc->digestrecps);
 468                         sc->digestrecps = nptr;
 469                 }
 470                 /* Do the same for participates */
 471                 while (sc->participates != NULL) {
 472                         StrBufAppendPrintf(Cfg, "participate|%s\n", sc->participates->name);
 473                         nptr = sc->participates->next;
 474                         free(sc->participates);
 475                         sc->participates = nptr;
 476                 }
 477                 while (sc->ignet_push_shares != NULL) {
 478                         StrBufAppendPrintf(Cfg, "ignet_push_share|%s", sc->ignet_push_shares->remote_nodename);
 479                         if (!IsEmptyStr(sc->ignet_push_shares->remote_roomname)) {
 480                                 StrBufAppendPrintf(Cfg, "|%s", sc->ignet_push_shares->remote_roomname);
 481                         }
 482                         StrBufAppendPrintf(Cfg, "\n");
 483                         mptr = sc->ignet_push_shares->next;
 484                         free(sc->ignet_push_shares);
 485                         sc->ignet_push_shares = mptr;
 486                 }
 487                 if (sc->misc != NULL) {
 488                         StrBufAppendBufPlain(Cfg, sc->misc, -1, 0);
 489                 }
 490                 free(sc->misc);
 491
 492                 rc = write(TmpFD, ChrPtr(Cfg), StrLength(Cfg));
 493                 if ((rc >=0 ) && (rc == StrLength(Cfg)))
 494                 {
 495                         close(TmpFD);
 496                         rename(tempfilename, filename);
 497                 }
 498                 else {
 499                         syslog(LOG_EMERG,
 500                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 501                                       tempfilename,
 502                                       strerror(errno));
 503                         close(TmpFD);
 504                         unlink(tempfilename);
 505                 }
 506                 FreeStrBuf(&Cfg);
 507                 free(sc);
 508                 *scc=NULL;
 509         }
 510         return 1;
 511 }
 512 #endif
 513 int is_recipient(SpoolControl *sc, const char *Name)
 514 {
 515         const RoomNetCfg RecipientCfgs[] = {
 516                 listrecp,
 517                 digestrecp,
 518                 participate,
 519                 maxRoomNetCfg
 520         };
 521         int i;
 522         namelist *nptr;
 523         size_t len;
 524
 525         len = strlen(Name);
 526         i = 0;
 527         while (RecipientCfgs[i] != maxRoomNetCfg)
 528         {
 529                 nptr = sc->NetConfigs[RecipientCfgs[i]];
 530
 531                 while (nptr != NULL)
 532                 {
 533                         if ((StrLength(nptr->Value) == len) &&
 534                             (!strcmp(Name, ChrPtr(nptr->Value))))
 535                         {
 536                                 return 1;
 537                         }
 538                         nptr = nptr->next;
 539                 }
 540         }
 541         return 0;
 542 }
 543
 544
 545 /*
 546  * Batch up and send all outbound traffic from the current room
 547  */
 548 void network_spoolout_room(RoomProcList *room_to_spool,
 549                            HashList *working_ignetcfg,
 550                            HashList *the_netmap)
 551 {
 552         char buf[SIZ];
 553         char filename[PATH_MAX];
 554         SpoolControl *sc;
 555         int i;
 556
 557         /*
 558          * If the room doesn't exist, don't try to perform its networking tasks.
 559          * Normally this should never happen, but once in a while maybe a room gets
 560          * queued for networking and then deleted before it can happen.
 561          */
 562         if (CtdlGetRoom(&CC->room, room_to_spool->name) != 0) {
 563                 syslog(LOG_CRIT, "ERROR: cannot load <%s>\n", room_to_spool->name);
 564                 return;
 565         }
 566
 567         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 568         begin_critical_section(S_NETCONFIGS);
 569
 570         /* Only do net processing for rooms that have netconfigs */
 571         if (!read_spoolcontrol_file(&sc, filename))
 572         {
 573                 end_critical_section(S_NETCONFIGS);
 574                 return;
 575         }
 576         syslog(LOG_INFO, "Networking started for <%s>\n", CC->room.QRname);
 577
 578         sc->working_ignetcfg = working_ignetcfg;
 579         sc->the_netmap = the_netmap;
 580
 581         /* If there are digest recipients, we have to build a digest */
 582         if (sc->NetConfigs[digestrecp] != NULL) {
 583                 sc->digestfp = tmpfile();
 584                 fprintf(sc->digestfp, "Content-type: text/plain\n\n");
 585         }
 586
 587         /* Do something useful */
 588         CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
 589                 network_spool_msg, sc);
 590
 591         /* If we wrote a digest, deliver it and then close it */
 592         snprintf(buf, sizeof buf, "room_%s@%s",
 593                 CC->room.QRname, config.c_fqdn);
 594         for (i=0; buf[i]; ++i) {
 595                 buf[i] = tolower(buf[i]);
 596                 if (isspace(buf[i])) buf[i] = '_';
 597         }
 598         if (sc->digestfp != NULL) {
 599                 fprintf(sc->digestfp,   " -----------------------------------"
 600                                         "------------------------------------"
 601                                         "-------\n"
 602                                         "You are subscribed to the '%s' "
 603                                         "list.\n"
 604                                         "To post to the list: %s\n",
 605                                         CC->room.QRname, buf
 606                 );
 607                 network_deliver_digest(sc);     /* deliver and close */
 608         }
 609
 610         /* Now rewrite the config file */
 611         //// todo writenfree_spoolcontrol_file(&sc, filename);
 612         end_critical_section(S_NETCONFIGS);
 613 }
 614
 615 /*
 616  * Process a buffer containing a single message from a single file
 617  * from the inbound queue
 618  */
 619 void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 620 {
 621         struct CitContext *CCC = CC;
 622         StrBuf *Buf = NULL;
 623         struct CtdlMessage *msg = NULL;
 624         long pos;
 625         int field;
 626         struct recptypes *recp = NULL;
 627         char target_room[ROOMNAMELEN];
 628         struct ser_ret sermsg;
 629         char *oldpath = NULL;
 630         char filename[PATH_MAX];
 631         FILE *fp;
 632         const StrBuf *nexthop = NULL;
 633         unsigned char firstbyte;
 634         unsigned char lastbyte;
 635
 636         QN_syslog(LOG_DEBUG, "network_process_buffer() processing %ld bytes\n", size);
 637
 638         /* Validate just a little bit.  First byte should be FF and * last byte should be 00. */
 639         firstbyte = buffer[0];
 640         lastbyte = buffer[size-1];
 641         if ( (firstbyte != 255) || (lastbyte != 0) ) {
 642                 QN_syslog(LOG_ERR, "Corrupt message ignored.  Length=%ld, firstbyte = %d, lastbyte = %d\n",
 643                           size, firstbyte, lastbyte);
 644                 return;
 645         }
 646
 647         /* Set default target room to trash */
 648         strcpy(target_room, TWITROOM);
 649
 650         /* Load the message into memory */
 651         msg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
 652         memset(msg, 0, sizeof(struct CtdlMessage));
 653         msg->cm_magic = CTDLMESSAGE_MAGIC;
 654         msg->cm_anon_type = buffer[1];
 655         msg->cm_format_type = buffer[2];
 656
 657         for (pos = 3; pos < size; ++pos) {
 658                 field = buffer[pos];
 659                 msg->cm_fields[field] = strdup(&buffer[pos+1]);
 660                 pos = pos + strlen(&buffer[(int)pos]);
 661         }
 662
 663         /* Check for message routing */
 664         if (msg->cm_fields['D'] != NULL) {
 665                 if (strcasecmp(msg->cm_fields['D'], config.c_nodename)) {
 666
 667                         /* route the message */
 668                         Buf = NewStrBufPlain(msg->cm_fields['D'], -1);
 669                         if (is_valid_node(&nexthop,
 670                                           NULL,
 671                                           Buf,
 672                                           working_ignetcfg,
 673                                           the_netmap) == 0)
 674                         {
 675                                 /* prepend our node to the path */
 676                                 if (msg->cm_fields['P'] != NULL) {
 677                                         oldpath = msg->cm_fields['P'];
 678                                         msg->cm_fields['P'] = NULL;
 679                                 }
 680                                 else {
 681                                         oldpath = strdup("unknown_user");
 682                                 }
 683                                 size = strlen(oldpath) + SIZ;
 684                                 msg->cm_fields['P'] = malloc(size);
 685                                 snprintf(msg->cm_fields['P'], size, "%s!%s",
 686                                         config.c_nodename, oldpath);
 687                                 free(oldpath);
 688
 689                                 /* serialize the message */
 690                                 serialize_message(&sermsg, msg);
 691
 692                                 /* now send it */
 693                                 if (StrLength(nexthop) == 0) {
 694                                         nexthop = Buf;
 695                                 }
 696                                 snprintf(filename,
 697                                          sizeof filename,
 698                                          "%s/%s@%lx%x",
 699                                          ctdl_netout_dir,
 700                                          ChrPtr(nexthop),
 701                                          time(NULL),
 702                                          rand()
 703                                 );
 704                                 QN_syslog(LOG_DEBUG, "Appending to %s\n", filename);
 705                                 fp = fopen(filename, "ab");
 706                                 if (fp != NULL) {
 707                                         fwrite(sermsg.ser, sermsg.len, 1, fp);
 708                                         fclose(fp);
 709                                 }
 710                                 else {
 711                                         QN_syslog(LOG_ERR, "%s: %s\n", filename, strerror(errno));
 712                                 }
 713                                 free(sermsg.ser);
 714                                 CtdlFreeMessage(msg);
 715                                 FreeStrBuf(&Buf);
 716                                 return;
 717                         }
 718
 719                         else {  /* invalid destination node name */
 720                                 FreeStrBuf(&Buf);
 721
 722                                 network_bounce(msg,
 723 "A message you sent could not be delivered due to an invalid destination node"
 724 " name.  Please check the address and try sending the message again.\n");
 725                                 msg = NULL;
 726                                 return;
 727
 728                         }
 729                 }
 730         }
 731
 732         /*
 733          * Check to see if we already have a copy of this message, and
 734          * abort its processing if so.  (We used to post a warning to Aide>
 735          * every time this happened, but the network is now so densely
 736          * connected that it's inevitable.)
 737          */
 738         if (network_usetable(msg) != 0) {
 739                 CtdlFreeMessage(msg);
 740                 return;
 741         }
 742
 743         /* Learn network topology from the path */
 744         if ((msg->cm_fields['N'] != NULL) && (msg->cm_fields['P'] != NULL)) {
 745                 network_learn_topology(msg->cm_fields['N'],
 746                                        msg->cm_fields['P'],
 747                                        the_netmap,
 748                                        netmap_changed);
 749         }
 750
 751         /* Is the sending node giving us a very persuasive suggestion about
 752          * which room this message should be saved in?  If so, go with that.
 753          */
 754         if (msg->cm_fields['C'] != NULL) {
 755                 safestrncpy(target_room, msg->cm_fields['C'], sizeof target_room);
 756         }
 757
 758         /* Otherwise, does it have a recipient?  If so, validate it... */
 759         else if (msg->cm_fields['R'] != NULL) {
 760                 recp = validate_recipients(msg->cm_fields['R'], NULL, 0);
 761                 if (recp != NULL) if (recp->num_error != 0) {
 762                         network_bounce(msg,
 763                                 "A message you sent could not be delivered due to an invalid address.\n"
 764                                 "Please check the address and try sending the message again.\n");
 765                         msg = NULL;
 766                         free_recipients(recp);
 767                         QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
 768                         return;
 769                 }
 770                 strcpy(target_room, "");        /* no target room if mail */
 771         }
 772
 773         /* Our last shot at finding a home for this message is to see if
 774          * it has the O field (Originating room) set.
 775          */
 776         else if (msg->cm_fields['O'] != NULL) {
 777                 safestrncpy(target_room, msg->cm_fields['O'], sizeof target_room);
 778         }
 779
 780         /* Strip out fields that are only relevant during transit */
 781         if (msg->cm_fields['D'] != NULL) {
 782                 free(msg->cm_fields['D']);
 783                 msg->cm_fields['D'] = NULL;
 784         }
 785         if (msg->cm_fields['C'] != NULL) {
 786                 free(msg->cm_fields['C']);
 787                 msg->cm_fields['C'] = NULL;
 788         }
 789
 790         /* save the message into a room */
 791         if (PerformNetprocHooks(msg, target_room) == 0) {
 792                 msg->cm_flags = CM_SKIP_HOOKS;
 793                 CtdlSubmitMsg(msg, recp, target_room, 0);
 794         }
 795         CtdlFreeMessage(msg);
 796         free_recipients(recp);
 797 }
 798
 799
 800 /*
 801  * Process a single message from a single file from the inbound queue
 802  */
 803 void network_process_message(FILE *fp,
 804                              long msgstart,
 805                              long msgend,
 806                              HashList *working_ignetcfg,
 807                              HashList *the_netmap,
 808                              int *netmap_changed)
 809 {
 810         long hold_pos;
 811         long size;
 812         char *buffer;
 813
 814         hold_pos = ftell(fp);
 815         size = msgend - msgstart + 1;
 816         buffer = malloc(size);
 817         if (buffer != NULL) {
 818                 fseek(fp, msgstart, SEEK_SET);
 819                 if (fread(buffer, size, 1, fp) > 0) {
 820                         network_process_buffer(buffer,
 821                                                size,
 822                                                working_ignetcfg,
 823                                                the_netmap,
 824                                                netmap_changed);
 825                 }
 826                 free(buffer);
 827         }
 828
 829         fseek(fp, hold_pos, SEEK_SET);
 830 }
 831
 832
 833 /*
 834  * Process a single file from the inbound queue
 835  */
 836 void network_process_file(char *filename,
 837                           HashList *working_ignetcfg,
 838                           HashList *the_netmap,
 839                           int *netmap_changed)
 840 {
 841         struct CitContext *CCC = CC;
 842         FILE *fp;
 843         long msgstart = (-1L);
 844         long msgend = (-1L);
 845         long msgcur = 0L;
 846         int ch;
 847
 848
 849         fp = fopen(filename, "rb");
 850         if (fp == NULL) {
 851                 QN_syslog(LOG_CRIT, "Error opening %s: %s\n", filename, strerror(errno));
 852                 return;
 853         }
 854
 855         fseek(fp, 0L, SEEK_END);
 856         QN_syslog(LOG_INFO, "network: processing %ld bytes from %s\n", ftell(fp), filename);
 857         rewind(fp);
 858
 859         /* Look for messages in the data stream and break them out */
 860         while (ch = getc(fp), ch >= 0) {
 861
 862                 if (ch == 255) {
 863                         if (msgstart >= 0L) {
 864                                 msgend = msgcur - 1;
 865                                 network_process_message(fp,
 866                                                         msgstart,
 867                                                         msgend,
 868                                                         working_ignetcfg,
 869                                                         the_netmap,
 870                                                         netmap_changed);
 871                         }
 872                         msgstart = msgcur;
 873                 }
 874
 875                 ++msgcur;
 876         }
 877
 878         msgend = msgcur - 1;
 879         if (msgstart >= 0L) {
 880                 network_process_message(fp,
 881                                         msgstart,
 882                                         msgend,
 883                                         working_ignetcfg,
 884                                         the_netmap,
 885                                         netmap_changed);
 886         }
 887
 888         fclose(fp);
 889         unlink(filename);
 890 }
 891
 892
 893 /*
 894  * Process anything in the inbound queue
 895  */
 896 void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *netmap_changed)
 897 {
 898         struct CitContext *CCC = CC;
 899         DIR *dp;
 900         struct dirent *d;
 901         struct stat statbuf;
 902         char filename[PATH_MAX];
 903         static time_t last_spoolin_mtime = 0L;
 904
 905         /*
 906          * Check the spoolin directory's modification time.  If it hasn't
 907          * been touched, we don't need to scan it.
 908          */
 909         if (stat(ctdl_netin_dir, &statbuf)) return;
 910         if (statbuf.st_mtime == last_spoolin_mtime) {
 911                 QNM_syslog(LOG_DEBUG, "network: nothing in inbound queue\n");
 912                 return;
 913         }
 914         last_spoolin_mtime = statbuf.st_mtime;
 915         QNM_syslog(LOG_DEBUG, "network: processing inbound queue\n");
 916
 917         /*
 918          * Ok, there's something interesting in there, so scan it.
 919          */
 920         dp = opendir(ctdl_netin_dir);
 921         if (dp == NULL) return;
 922
 923         while (d = readdir(dp), d != NULL) {
 924                 if ((strcmp(d->d_name, ".")) && (strcmp(d->d_name, ".."))) {
 925                         snprintf(filename,
 926                                 sizeof filename,
 927                                 "%s/%s",
 928                                 ctdl_netin_dir,
 929                                 d->d_name
 930                         );
 931                         network_process_file(filename,
 932                                              working_ignetcfg,
 933                                              the_netmap,
 934                                              netmap_changed);
 935                 }
 936         }
 937
 938         closedir(dp);
 939 }
 940
 941 /*
 942  * Step 1: consolidate files in the outbound queue into one file per neighbor node
 943  * Step 2: delete any files in the outbound queue that were for neighbors who no longer exist.
 944  */
 945 void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netmap)
 946 {
 947         struct CitContext *CCC = CC;
 948         IOBuffer IOB;
 949         FDIOBuffer FDIO;
 950         int d_namelen;
 951         DIR *dp;
 952         struct dirent *d;
 953         struct dirent *filedir_entry;
 954         const char *pch;
 955         char spooloutfilename[PATH_MAX];
 956         char filename[PATH_MAX];
 957         const StrBuf *nexthop;
 958         StrBuf *NextHop;
 959         int i;
 960         struct stat statbuf;
 961         int nFailed = 0;
 962
 963         /* Step 1: consolidate files in the outbound queue into one file per neighbor node */
 964         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 965         if (d == NULL)  return;
 966
 967         dp = opendir(ctdl_netout_dir);
 968         if (dp == NULL) {
 969                 free(d);
 970                 return;
 971         }
 972
 973         NextHop = NewStrBuf();
 974         memset(&IOB, 0, sizeof(IOBuffer));
 975         memset(&FDIO, 0, sizeof(FDIOBuffer));
 976         FDIO.IOB = &IOB;
 977
 978         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
 979                (filedir_entry != NULL))
 980         {
 981 #ifdef _DIRENT_HAVE_D_NAMELEN
 982                 d_namelen = filedir_entry->d_namelen;
 983 #else
 984
 985 #ifndef DT_UNKNOWN
 986 #define DT_UNKNOWN     0
 987 #define DT_DIR         4
 988 #define DT_REG         8
 989 #define DT_LNK         10
 990
 991 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 992 #define DTTOIF(dirtype)        ((dirtype) << 12)
 993 #endif
 994                 d_namelen = strlen(filedir_entry->d_name);
 995 #endif
 996                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 997                         continue; /* Ignore backup files... */
 998
 999                 if ((d_namelen == 1) &&
1000                     (filedir_entry->d_name[0] == '.'))
1001                         continue;
1002
1003                 if ((d_namelen == 2) &&
1004                     (filedir_entry->d_name[0] == '.') &&
1005                     (filedir_entry->d_name[1] == '.'))
1006                         continue;
1007
1008                 pch = strchr(filedir_entry->d_name, '@');
1009                 if (pch == NULL)
1010                         continue;
1011
1012                 snprintf(filename,
1013                          sizeof filename,
1014                          "%s/%s",
1015                          ctdl_netout_dir,
1016                          filedir_entry->d_name);
1017
1018                 StrBufPlain(NextHop,
1019                             filedir_entry->d_name,
1020                             pch - filedir_entry->d_name);
1021
1022                 snprintf(spooloutfilename,
1023                          sizeof spooloutfilename,
1024                          "%s/%s",
1025                          ctdl_netout_dir,
1026                          ChrPtr(NextHop));
1027
1028                 QN_syslog(LOG_DEBUG, "Consolidate %s to %s\n", filename, ChrPtr(NextHop));
1029                 if (network_talking_to(SKEY(NextHop), NTT_CHECK)) {
1030                         nFailed++;
1031                         QN_syslog(LOG_DEBUG,
1032                                   "Currently online with %s - skipping for now\n",
1033                                   ChrPtr(NextHop)
1034                                 );
1035                 }
1036                 else {
1037                         size_t dsize;
1038                         size_t fsize;
1039                         int infd, outfd;
1040                         const char *err = NULL;
1041                         network_talking_to(SKEY(NextHop), NTT_ADD);
1042
1043                         infd = open(filename, O_RDONLY);
1044                         if (infd == -1) {
1045                                 nFailed++;
1046                                 QN_syslog(LOG_ERR,
1047                                           "failed to open %s for reading due to %s; skipping.\n",
1048                                           filename, strerror(errno)
1049                                         );
1050                                 network_talking_to(SKEY(NextHop), NTT_REMOVE);
1051                                 continue;
1052                         }
1053
1054                         outfd = open(spooloutfilename,
1055                                   O_EXCL|O_CREAT|O_NONBLOCK|O_WRONLY,
1056                                   S_IRUSR|S_IWUSR);
1057                         if (outfd == -1)
1058                         {
1059                                 outfd = open(spooloutfilename,
1060                                              O_EXCL|O_NONBLOCK|O_WRONLY,
1061                                              S_IRUSR | S_IWUSR);
1062                         }
1063                         if (outfd == -1) {
1064                                 nFailed++;
1065                                 QN_syslog(LOG_ERR,
1066                                           "failed to open %s for reading due to %s; skipping.\n",
1067                                           spooloutfilename, strerror(errno)
1068                                         );
1069                                 close(infd);
1070                                 network_talking_to(SKEY(NextHop), NTT_REMOVE);
1071                                 continue;
1072                         }
1073
1074                         dsize = lseek(outfd, 0, SEEK_END);
1075                         lseek(outfd, -dsize, SEEK_SET);
1076
1077                         fstat(infd, &statbuf);
1078                         fsize = statbuf.st_size;
1079 /*
1080                         fsize = lseek(infd, 0, SEEK_END);
1081 */
1082                         IOB.fd = infd;
1083                         FDIOBufferInit(&FDIO, &IOB, outfd, fsize + dsize);
1084                         FDIO.ChunkSendRemain = fsize;
1085                         FDIO.TotalSentAlready = dsize;
1086                         err = NULL;
1087                         errno = 0;
1088                         do {} while ((FileMoveChunked(&FDIO, &err) > 0) && (err == NULL));
1089                         if (err == NULL) {
1090                                 unlink(filename);
1091                         }
1092                         else {
1093                                 nFailed++;
1094                                 QN_syslog(LOG_ERR,
1095                                           "failed to append to %s [%s]; rolling back..\n",
1096                                           spooloutfilename, strerror(errno)
1097                                         );
1098                                 /* whoops partial append?? truncate spooloutfilename again! */
1099                                 ftruncate(outfd, dsize);
1100                         }
1101                         FDIOBufferDelete(&FDIO);
1102                         close(infd);
1103                         close(outfd);
1104                         network_talking_to(SKEY(NextHop), NTT_REMOVE);
1105                 }
1106         }
1107         closedir(dp);
1108
1109         if (nFailed > 0) {
1110                 FreeStrBuf(&NextHop);
1111                 QN_syslog(LOG_INFO,
1112                           "skipping Spoolcleanup because of %d files unprocessed.\n",
1113                           nFailed
1114                         );
1115
1116                 return;
1117         }
1118
1119         /* Step 2: delete any files in the outbound queue that were for neighbors who no longer exist */
1120         dp = opendir(ctdl_netout_dir);
1121         if (dp == NULL) {
1122                 FreeStrBuf(&NextHop);
1123                 free(d);
1124                 return;
1125         }
1126
1127         while ((readdir_r(dp, d, &filedir_entry) == 0) &&
1128                (filedir_entry != NULL))
1129         {
1130 #ifdef _DIRENT_HAVE_D_NAMELEN
1131                 d_namelen = filedir_entry->d_namelen;
1132                 d_type = filedir_entry->d_type;
1133 #else
1134
1135 #ifndef DT_UNKNOWN
1136 #define DT_UNKNOWN     0
1137 #define DT_DIR         4
1138 #define DT_REG         8
1139 #define DT_LNK         10
1140
1141 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
1142 #define DTTOIF(dirtype)        ((dirtype) << 12)
1143 #endif
1144                 d_namelen = strlen(filedir_entry->d_name);
1145 #endif
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 = is_valid_node(&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
1186
1187
1188 /*
1189  * It's ok if these directories already exist.  Just fail silently.
1190  */
1191 void create_spool_dirs(void) {
1192         if ((mkdir(ctdl_spool_dir, 0700) != 0) && (errno != EEXIST))
1193                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_spool_dir, strerror(errno));
1194         if (chown(ctdl_spool_dir, CTDLUID, (-1)) != 0)
1195                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_spool_dir, strerror(errno));
1196         if ((mkdir(ctdl_netin_dir, 0700) != 0) && (errno != EEXIST))
1197                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netin_dir, strerror(errno));
1198         if (chown(ctdl_netin_dir, CTDLUID, (-1)) != 0)
1199                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netin_dir, strerror(errno));
1200         if ((mkdir(ctdl_nettmp_dir, 0700) != 0) && (errno != EEXIST))
1201                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1202         if (chown(ctdl_nettmp_dir, CTDLUID, (-1)) != 0)
1203                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_nettmp_dir, strerror(errno));
1204         if ((mkdir(ctdl_netout_dir, 0700) != 0) && (errno != EEXIST))
1205                 syslog(LOG_EMERG, "unable to create directory [%s]: %s", ctdl_netout_dir, strerror(errno));
1206         if (chown(ctdl_netout_dir, CTDLUID, (-1)) != 0)
1207                 syslog(LOG_EMERG, "unable to set the access rights for [%s]: %s", ctdl_netout_dir, strerror(errno));
1208 }
1209
1210 /*
1211  * Module entry point
1212  */
1213 CTDL_MODULE_INIT(network_spool)
1214 {
1215         if (!threading)
1216         {
1217 //              REGISTERRoomCfgType(subpending, ParseSubPendingLine, 0, SerializeSubPendingLine, DeleteSubPendingLine); /// todo: move this to mailinglist manager
1218 //              REGISTERRoomCfgType(unsubpending, ParseUnSubPendingLine0, SerializeUnSubPendingLine, DeleteUnSubPendingLine); /// todo: move this to mailinglist manager
1219 //              REGISTERRoomCfgType(lastsent, ParseLastSent, 1, SerializeLastSent, DeleteLastSent);
1220 ///             REGISTERRoomCfgType(ignet_push_share, ParseIgnetPushShare, 0, SerializeIgnetPushShare, DeleteIgnetPushShare); // todo: move this to the ignet client
1221                 REGISTERRoomCfgType(listrecp, ParseDefault, 0, SerializeGeneric, DeleteGenericCfgLine);
1222                 REGISTERRoomCfgType(digestrecp, ParseDefault, 0, SerializeGeneric, DeleteGenericCfgLine);
1223                 REGISTERRoomCfgType(pop3client, ParseDefault, 0, SerializeGeneric, DeleteGenericCfgLine);/// todo: implement pop3 specific parser
1224                 REGISTERRoomCfgType(rssclient, ParseDefault, 0, SerializeGeneric, DeleteGenericCfgLine); /// todo: implement rss specific parser
1225                 REGISTERRoomCfgType(participate, ParseDefault, 0, SerializeGeneric, DeleteGenericCfgLine);
1226                 REGISTERRoomCfgType(roommailalias, ParseRoomAlias, 0, SerializeGeneric, DeleteGenericCfgLine);
1227
1228                 create_spool_dirs();
1229 //////todo              CtdlRegisterCleanupHook(destroy_network_queue_room);
1230         }
1231         return "network_spool";
1232 }