citadel/netconfig.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  */
  16
  17 #include "sysdep.h"
  18 #include <stdio.h>
  19
  20 #ifdef HAVE_SYSCALL_H
  21 # include <syscall.h>
  22 #else
  23 # if HAVE_SYS_SYSCALL_H
  24 #  include <sys/syscall.h>
  25 # endif
  26 #endif
  27 #include <dirent.h>
  28
  29 #include <libcitadel.h>
  30
  31 #include "include/ctdl_module.h"
  32
  33
  34 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg);
  35
  36 HashList *CfgTypeHash = NULL;
  37 HashList *RoomConfigs = NULL;
  38 /*-----------------------------------------------------------------------------*
  39  *                       Per room network configs                              *
  40  *-----------------------------------------------------------------------------*/
  41 void RegisterRoomCfgType(const char* Name, long len, RoomNetCfg eCfg, CfgLineParser p, int uniq,  int nSegments, CfgLineSerializer s, CfgLineDeAllocator d)
  42 {
  43         CfgLineType *pCfg;
  44
  45         pCfg = (CfgLineType*) malloc(sizeof(CfgLineType));
  46         pCfg->Parser = p;
  47         pCfg->Serializer = s;
  48         pCfg->DeAllocator = d;
  49         pCfg->C = eCfg;
  50         pCfg->Str.Key = Name;
  51         pCfg->Str.len = len;
  52         pCfg->IsSingleLine = uniq;
  53         pCfg->nSegments = nSegments;
  54         if (CfgTypeHash == NULL)
  55                 CfgTypeHash = NewHash(1, NULL);
  56         Put(CfgTypeHash, Name, len, pCfg, NULL);
  57 }
  58
  59
  60 const CfgLineType *GetCfgTypeByStr(const char *Key, long len)
  61 {
  62         void *pv;
  63
  64         if (GetHash(CfgTypeHash, Key, len, &pv) && (pv != NULL))
  65         {
  66                 return (const CfgLineType *) pv;
  67         }
  68         else
  69         {
  70                 return NULL;
  71         }
  72 }
  73
  74 const CfgLineType *GetCfgTypeByEnum(RoomNetCfg eCfg, HashPos *It)
  75 {
  76         const char *Key;
  77         long len;
  78         void *pv;
  79         CfgLineType *pCfg;
  80
  81         RewindHashPos(CfgTypeHash, It, 1);
  82         while (GetNextHashPos(CfgTypeHash, It, &len, &Key, &pv) && (pv != NULL))
  83         {
  84                 pCfg = (CfgLineType*) pv;
  85                 if (pCfg->C == eCfg)
  86                         return pCfg;
  87         }
  88         return NULL;
  89 }
  90 void ParseGeneric(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCfg)
  91 {
  92         RoomNetCfgLine *nptr;
  93         int i;
  94
  95         nptr = (RoomNetCfgLine *)
  96                 malloc(sizeof(RoomNetCfgLine));
  97         nptr->next = OneRNCfg->NetConfigs[ThisOne->C];
  98         nptr->Value = malloc(sizeof(StrBuf*) * ThisOne->nSegments);
  99         nptr->nValues = 0;
 100         memset(nptr->Value, 0, sizeof(StrBuf*) * ThisOne->nSegments);
 101         if (ThisOne->nSegments == 1)
 102         {
 103                 nptr->Value[0] = NewStrBufPlain(LinePos, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 104                 nptr->nValues = 1;
 105         }
 106         else for (i = 0; i < ThisOne->nSegments; i++)
 107         {
 108                 nptr->nValues++;
 109                 nptr->Value[i] = NewStrBufPlain(NULL, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 110                 StrBufExtract_NextToken(nptr->Value[i], Line, &LinePos, '|');
 111         }
 112
 113         OneRNCfg->NetConfigs[ThisOne->C] = nptr;
 114 }
 115
 116 void SerializeGeneric(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *OneRNCfg, RoomNetCfgLine *data)
 117 {
 118         int i;
 119
 120         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 121         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 122         for (i = 0; i < ThisOne->nSegments; i++)
 123         {
 124                 StrBufAppendBuf(OutputBuffer, data->Value[i], 0);
 125                 if (i + 1 < ThisOne->nSegments)
 126                         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 127         }
 128         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 129 }
 130
 131 void DeleteGenericCfgLine(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 132 {
 133         int i;
 134
 135         if (*data == NULL)
 136                 return;
 137
 138         for (i = 0; i < (*data)->nValues; i++)
 139         {
 140                 FreeStrBuf(&(*data)->Value[i]);
 141         }
 142         free ((*data)->Value);
 143         free(*data);
 144         *data = NULL;
 145 }
 146 RoomNetCfgLine *DuplicateOneGenericCfgLine(const RoomNetCfgLine *data)
 147 {
 148         RoomNetCfgLine *NewData;
 149
 150         NewData = (RoomNetCfgLine*)malloc(sizeof(RoomNetCfgLine));
 151         int i;
 152         NewData->Value = (StrBuf **)malloc(sizeof(StrBuf*) * data->nValues);
 153
 154         for (i = 0; i < data->nValues; i++)
 155         {
 156                 NewData->Value[i] = NewStrBufDup(data->Value[i]);
 157         }
 158         return NewData;
 159 }
 160 int ReadRoomNetConfigFile(OneRoomNetCfg **pOneRNCfg, char *filename)
 161 {
 162         int fd;
 163         const char *ErrStr = NULL;
 164         const char *Pos;
 165         const CfgLineType *pCfg;
 166         StrBuf *Line;
 167         StrBuf *InStr;
 168         OneRoomNetCfg *OneRNCfg = NULL;
 169
 170         fd = open(filename, O_NONBLOCK|O_RDONLY);
 171         if (fd == -1) {
 172                 *pOneRNCfg = NULL;
 173                 return 0;
 174         }
 175         if (*pOneRNCfg != NULL)
 176         {
 177                 OneRNCfg = *pOneRNCfg;
 178                 FreeRoomNetworkStructContent (OneRNCfg);
 179         }
 180         else
 181                 OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 182         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 183         *pOneRNCfg = OneRNCfg;
 184         Line = NewStrBuf();
 185         InStr = NewStrBuf();
 186
 187         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 188                 if (StrLength(Line) == 0)
 189                         continue;
 190                 Pos = NULL;
 191                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 192
 193                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 194                 if (pCfg != NULL)
 195                 {
 196                         pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 197                 }
 198                 else
 199                 {
 200                         if (OneRNCfg->misc == NULL)
 201                         {
 202                                 OneRNCfg->misc = NewStrBufDup(Line);
 203                         }
 204                         else
 205                         {
 206                                 if(StrLength(OneRNCfg->misc) > 0)
 207                                         StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 208                                 StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 209                         }
 210                 }
 211         }
 212         if (fd > 0)
 213                 close(fd);
 214         FreeStrBuf(&InStr);
 215         FreeStrBuf(&Line);
 216         return 1;
 217 }
 218
 219 int SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, char *filename)
 220 {
 221         RoomNetCfg eCfg;
 222         StrBuf *Cfg = NULL;
 223         StrBuf *OutBuffer = NULL;
 224         char tempfilename[PATH_MAX];
 225         int TmpFD;
 226         long len;
 227         time_t unixtime;
 228         struct timeval tv;
 229         long reltid; /* if we don't have SYS_gettid, use "random" value */
 230         int rc;
 231         HashPos *CfgIt;
 232
 233         len = strlen(filename);
 234         memcpy(tempfilename, filename, len + 1);
 235
 236 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 237         reltid = syscall(SYS_gettid);
 238 #endif
 239         gettimeofday(&tv, NULL);
 240         /* Promote to time_t; types differ on some OSes (like darwin) */
 241         unixtime = tv.tv_sec;
 242
 243         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 244         errno = 0;
 245         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 246         Cfg = NewStrBuf();
 247         if ((TmpFD < 0) || (errno != 0)) {
 248                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 249                         filename, strerror(errno));
 250                 unlink(tempfilename);
 251                 FreeStrBuf(&Cfg);
 252                 return 0;
 253         }
 254         else {
 255                 OutBuffer = NewStrBuf();
 256                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 257                 fchown(TmpFD, config.c_ctdluid, 0);
 258                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 259                 {
 260                         const CfgLineType *pCfg;
 261                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 262                         if (pCfg->IsSingleLine)
 263                         {
 264                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 265                         }
 266                         else
 267                         {
 268                                 RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 269                                 while (pName != NULL)
 270                                 {
 271                                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 272                                         pName = pName->next;
 273                                 }
 274
 275
 276                         }
 277
 278                 }
 279                 DeleteHashPos(&CfgIt);
 280
 281
 282                 if (OneRNCfg->misc != NULL) {
 283                         StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 284                 }
 285
 286                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 287                 if ((rc >=0 ) && (rc == StrLength(OutBuffer)))
 288                 {
 289                         close(TmpFD);
 290                         rename(tempfilename, filename);
 291                         rc = 1;
 292                 }
 293                 else {
 294                         syslog(LOG_EMERG,
 295                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 296                                       tempfilename,
 297                                       strerror(errno));
 298                         close(TmpFD);
 299                         unlink(tempfilename);
 300                         rc = 0;
 301                 }
 302                 FreeStrBuf(&OutBuffer);
 303
 304         }
 305         FreeStrBuf(&Cfg);
 306         return rc;
 307 }
 308
 309 void SaveModifiedRooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 310 {
 311         char filename[PATH_MAX];
 312
 313         if (OneRNCfg->changed)
 314         {
 315                 assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 316                 SaveRoomNetConfigFile(OneRNCfg, filename);
 317                 OneRNCfg->changed = 0;
 318         }
 319 }
 320 void SaveChangedConfigs(void)
 321 {
 322         CtdlForEachNetCfgRoom(SaveModifiedRooms,
 323                               NULL,
 324                               maxRoomNetCfg);
 325 }
 326
 327
 328 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 329 {
 330         int new = 0;
 331         RoomNetCfgLine **pLine;
 332         char filename[PATH_MAX];
 333
 334         if (OneRNCfg == NULL)
 335         {
 336                 new = 1;
 337                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 338                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 339         }
 340         pLine = &OneRNCfg->NetConfigs[LineType];
 341
 342         while(*pLine != NULL) pLine = &((*pLine)->next);
 343         *pLine = Line;
 344
 345         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 346         SaveRoomNetConfigFile(OneRNCfg, filename);
 347         OneRNCfg->changed = 0;
 348         if (new)
 349         {
 350                 Put(RoomConfigs, LKEY(qrbuf->QRnumber), OneRNCfg, vFreeRoomNetworkStruct);
 351         }
 352 }
 353
 354 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 355 {
 356         RoomNetCfg eCfg;
 357         HashPos *CfgIt;
 358
 359         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 360         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 361         {
 362                 const CfgLineType *pCfg;
 363                 RoomNetCfgLine *pNext, *pName;
 364
 365                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 366                 pName= OneRNCfg->NetConfigs[eCfg];
 367                 while (pName != NULL)
 368                 {
 369                         pNext = pName->next;
 370                         if (pCfg != NULL)
 371                         {
 372                                 pCfg->DeAllocator(pCfg, &pName);
 373                         }
 374                         else
 375                         {
 376                                 DeleteGenericCfgLine(NULL, &pName);
 377                         }
 378                         pName = pNext;
 379                 }
 380         }
 381         DeleteHashPos(&CfgIt);
 382
 383         FreeStrBuf(&OneRNCfg->Sender);
 384         FreeStrBuf(&OneRNCfg->RoomInfo);
 385         FreeStrBuf(&OneRNCfg->misc);
 386 }
 387 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 388 {
 389         OneRoomNetCfg *OneRNCfg;
 390         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 391         FreeRoomNetworkStructContent(OneRNCfg);
 392         free(OneRNCfg);
 393 }
 394 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 395 {
 396         vFreeRoomNetworkStruct(*pOneRNCfg);
 397         *pOneRNCfg=NULL;
 398 }
 399
 400 OneRoomNetCfg* CtdlGetNetCfgForRoom(long QRNumber)
 401 {
 402         void *pv;
 403         GetHash(RoomConfigs, LKEY(QRNumber), &pv);
 404         return (OneRoomNetCfg*)pv;
 405 }
 406
 407
 408 void LoadAllNetConfigs(void)
 409 {
 410         DIR *filedir = NULL;
 411         struct dirent *d;
 412         struct dirent *filedir_entry;
 413         int d_type = 0;
 414         int d_namelen;
 415         long RoomNumber;
 416         OneRoomNetCfg *OneRNCfg;
 417         int IsNumOnly;
 418         const char *pch;
 419         char path[PATH_MAX];
 420
 421         RoomConfigs = NewHash(1, NULL);
 422         filedir = opendir (ctdl_netcfg_dir);
 423         if (filedir == NULL) {
 424                 return ; /// todo: panic!
 425         }
 426
 427         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 428         if (d == NULL) {
 429                 closedir(filedir);
 430                 return ;
 431         }
 432
 433         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 434                (filedir_entry != NULL))
 435         {
 436 #ifdef _DIRENT_HAVE_D_NAMLEN
 437                 d_namelen = filedir_entry->d_namelen;
 438 #else
 439                 d_namelen = strlen(filedir_entry->d_name);
 440 #endif
 441
 442 #ifdef _DIRENT_HAVE_D_TYPE
 443                 d_type = filedir_entry->d_type;
 444 #else
 445
 446 #ifndef DT_UNKNOWN
 447 #define DT_UNKNOWN     0
 448 #define DT_DIR         4
 449 #define DT_REG         8
 450 #define DT_LNK         10
 451
 452 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 453 #define DTTOIF(dirtype)        ((dirtype) << 12)
 454 #endif
 455                 d_type = DT_UNKNOWN;
 456 #endif
 457                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 458                         continue; /* Ignore backup files... */
 459
 460                 if ((d_namelen == 1) &&
 461                     (filedir_entry->d_name[0] == '.'))
 462                         continue;
 463
 464                 if ((d_namelen == 2) &&
 465                     (filedir_entry->d_name[0] == '.') &&
 466                     (filedir_entry->d_name[1] == '.'))
 467                         continue;
 468
 469                 snprintf(path, PATH_MAX, "%s/%s",
 470                          ctdl_netcfg_dir, filedir_entry->d_name);
 471
 472                 if (d_type == DT_UNKNOWN) {
 473                         struct stat s;
 474                         if (lstat(path, &s) == 0) {
 475                                 d_type = IFTODT(s.st_mode);
 476                         }
 477                 }
 478
 479                 switch (d_type)
 480                 {
 481                 case DT_DIR:
 482                         break;
 483                 case DT_LNK: /* TODO: check whether its a file or a directory */
 484                 case DT_REG:
 485                         IsNumOnly = 1;
 486                         pch = filedir_entry->d_name;
 487                         while (*pch != '\0')
 488                         {
 489                                 if (!isdigit(*pch))
 490                                 {
 491                                         IsNumOnly = 0;
 492                                 }
 493                                 pch ++;
 494                         }
 495                         if (IsNumOnly)
 496                         {
 497                                 OneRNCfg = NULL;
 498                                 RoomNumber = atol(filedir_entry->d_name);
 499                                 ReadRoomNetConfigFile(&OneRNCfg, path);
 500
 501                                 if (OneRNCfg != NULL)
 502                                         Put(RoomConfigs, LKEY(RoomNumber), OneRNCfg, vFreeRoomNetworkStruct);
 503                                 /* syslog(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 504                         }
 505                         break;
 506                 default:
 507                         break;
 508                 }
 509
 510
 511         }
 512         free(d);
 513         closedir(filedir);
 514 }
 515
 516
 517 /*-----------------------------------------------------------------------------*
 518  *              Per room network configs : exchange with client                *
 519  *-----------------------------------------------------------------------------*/
 520 void cmd_gnet(char *argbuf)
 521 {
 522         char filename[PATH_MAX];
 523         char buf[SIZ];
 524         FILE *fp;
 525
 526
 527         if (!IsEmptyStr(argbuf))
 528         {
 529                 if (CtdlAccessCheck(ac_aide)) return;
 530                 if (strcmp(argbuf, FILE_MAILALIAS))
 531                 {
 532                         cprintf("%d No such file or directory\n",
 533                                 ERROR + INTERNAL_ERROR);
 534                         return;
 535                 }
 536                 safestrncpy(filename, file_mail_aliases, sizeof(filename));
 537                 cprintf("%d Settings for <%s>\n",
 538                         LISTING_FOLLOWS,
 539                         filename);
 540         }
 541         else
 542         {
 543                 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 544                         /* users can edit the netconfigs for their own mailbox rooms */
 545                 }
 546                 else if (CtdlAccessCheck(ac_room_aide)) return;
 547
 548                 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 549                 cprintf("%d Network settings for room #%ld <%s>\n",
 550                         LISTING_FOLLOWS,
 551                         CC->room.QRnumber, CC->room.QRname);
 552         }
 553
 554         fp = fopen(filename, "r");
 555         if (fp != NULL) {
 556                 while (fgets(buf, sizeof buf, fp) != NULL) {
 557                         buf[strlen(buf)-1] = 0;
 558                         cprintf("%s\n", buf);
 559                 }
 560                 fclose(fp);
 561         }
 562
 563         cprintf("000\n");
 564 }
 565
 566 #define nForceAliases 5
 567 const ConstStr ForceAliases[nForceAliases] = {
 568         {HKEY("bbs,")},
 569         {HKEY("root,")},
 570         {HKEY("Auto,")},
 571         {HKEY("postmaster,")},
 572         {HKEY("abuse,")}
 573 };
 574
 575 void cmd_snet(char *argbuf)
 576 {
 577         struct CitContext *CCC = CC;
 578         char tempfilename[PATH_MAX];
 579         char filename[PATH_MAX];
 580         int TmpFD;
 581         StrBuf *Line;
 582         struct stat StatBuf;
 583         long len;
 584         int rc;
 585         int IsMailAlias = 0;
 586         int MailAliasesFound[nForceAliases];
 587
 588         unbuffer_output();
 589
 590         if (!IsEmptyStr(argbuf))
 591         {
 592                 if (CtdlAccessCheck(ac_aide)) return;
 593                 if (strcmp(argbuf, FILE_MAILALIAS))
 594                 {
 595                         cprintf("%d No such file or directory\n",
 596                                 ERROR + INTERNAL_ERROR);
 597                         return;
 598                 }
 599                 len = safestrncpy(filename, file_mail_aliases, sizeof(filename));
 600                 memset(MailAliasesFound, 0, sizeof(MailAliasesFound));
 601                 memcpy(tempfilename, filename, len + 1);
 602                 IsMailAlias = 1;
 603         }
 604         else
 605         {
 606                 if ( (CCC->room.QRflags & QR_MAILBOX) && (CCC->user.usernum == atol(CCC->room.QRname)) ) {
 607                         /* users can edit the netconfigs for their own mailbox rooms */
 608                 }
 609                 else if (CtdlAccessCheck(ac_room_aide)) return;
 610
 611                 len = assoc_file_name(filename, sizeof filename, &CCC->room, ctdl_netcfg_dir);
 612                 memcpy(tempfilename, filename, len + 1);
 613         }
 614         memset(&StatBuf, 0, sizeof(struct stat));
 615         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 616                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 617
 618         sprintf(tempfilename + len, ".%d", CCC->cs_pid);
 619         errno = 0;
 620         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 621
 622         if ((TmpFD > 0) && (errno == 0))
 623         {
 624                 char *tmp = malloc(StatBuf.st_size * 2);
 625                 memset(tmp, ' ', StatBuf.st_size * 2);
 626                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 627                 free(tmp);
 628                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 629                 {
 630                         close(TmpFD);
 631                         cprintf("%d Unable to allocate the space required for %s: %s\n",
 632                                 ERROR + INTERNAL_ERROR,
 633                                 tempfilename,
 634                                 strerror(errno));
 635                         unlink(tempfilename);
 636                         return;
 637                 }
 638                 lseek(TmpFD, SEEK_SET, 0);
 639         }
 640         else {
 641                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 642                         ERROR + INTERNAL_ERROR,
 643                         tempfilename,
 644                         strerror(errno));
 645                 unlink(tempfilename);
 646                 return;
 647         }
 648         Line = NewStrBuf();
 649
 650         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 651
 652         len = 0;
 653         while (rc = CtdlClientGetLine(Line),
 654                (rc >= 0))
 655         {
 656                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 657                         break;
 658                 if (IsMailAlias)
 659                 {
 660                         int i;
 661
 662                         for (i = 0; i < nForceAliases; i++)
 663                         {
 664                                 if ((!MailAliasesFound[i]) &&
 665                                     (strncmp(ForceAliases[i].Key,
 666                                              ChrPtr(Line),
 667                                              ForceAliases[i].len) == 0)
 668                                         )
 669                                     {
 670                                             MailAliasesFound[i] = 1;
 671                                             break;
 672                                     }
 673                         }
 674                 }
 675
 676                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 677                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 678                 len += StrLength(Line);
 679         }
 680         FreeStrBuf(&Line);
 681         ftruncate(TmpFD, len);
 682         close(TmpFD);
 683
 684         if (IsMailAlias)
 685         {
 686                 int i, state;
 687                 /*
 688                  * Sanity check whether all aliases required by the RFCs were set
 689                  * else bail out.
 690                  */
 691                 state = 1;
 692                 for (i = 0; i < nForceAliases; i++)
 693                 {
 694                         if (!MailAliasesFound[i])
 695                                 state = 0;
 696                 }
 697                 if (state == 0)
 698                 {
 699                         cprintf("%d won't do this - you're missing an RFC required alias.\n",
 700                                 ERROR + INTERNAL_ERROR);
 701                         unlink(tempfilename);
 702                         return;
 703                 }
 704         }
 705
 706         /* Now copy the temp file to its permanent location.
 707          * (We copy instead of link because they may be on different filesystems)
 708          */
 709         begin_critical_section(S_NETCONFIGS);
 710         rename(tempfilename, filename);
 711         if (!IsMailAlias)
 712         {
 713                 OneRoomNetCfg *RNCfg;
 714                 RNCfg = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 715                 if (RNCfg != NULL)
 716                 {
 717                         FreeRoomNetworkStructContent(RNCfg);
 718                         ReadRoomNetConfigFile(&RNCfg, filename);
 719                 }
 720                 else
 721                 {
 722                         ReadRoomNetConfigFile(&RNCfg, filename);
 723                         Put(RoomConfigs, LKEY(CCC->room.QRnumber), RNCfg, vFreeRoomNetworkStruct);
 724                 }
 725         }
 726         end_critical_section(S_NETCONFIGS);
 727 }
 728
 729
 730 /*-----------------------------------------------------------------------------*
 731  *                       Per node network configs                              *
 732  *-----------------------------------------------------------------------------*/
 733 void DeleteCtdlNodeConf(void *vNode)
 734 {
 735         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 736         FreeStrBuf(&Node->NodeName);
 737         FreeStrBuf(&Node->Secret);
 738         FreeStrBuf(&Node->Host);
 739         FreeStrBuf(&Node->Port);
 740         free(Node);
 741 }
 742
 743 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 744 {
 745         const char *Pos = NULL;
 746         CtdlNodeConf *Node;
 747
 748         /* we need at least 4 pipes and some other text so its invalid. */
 749         if (StrLength(SerializedNode) < 8)
 750                 return NULL;
 751         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 752
 753         Node->DeleteMe = 0;
 754
 755         Node->NodeName=NewStrBuf();
 756         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 757
 758         Node->Secret=NewStrBuf();
 759         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 760
 761         Node->Host=NewStrBuf();
 762         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 763
 764         Node->Port=NewStrBuf();
 765         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 766         return Node;
 767 }
 768
 769
 770 /*
 771  * Load or refresh the Citadel network (IGnet) configuration for this node.
 772  */
 773 HashList* CtdlLoadIgNetCfg(void)
 774 {
 775         const char *LinePos;
 776         char       *Cfg;
 777         StrBuf     *Buf;
 778         StrBuf     *LineBuf;
 779         HashList   *Hash;
 780         CtdlNodeConf   *Node;
 781
 782         Cfg =  CtdlGetSysConfig(IGNETCFG);
 783         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 784                 if (Cfg != NULL)
 785                         free(Cfg);
 786                 return NULL;
 787         }
 788
 789         Hash = NewHash(1, NULL);
 790         Buf = NewStrBufPlain(Cfg, -1);
 791         free(Cfg);
 792         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 793         LinePos = NULL;
 794         do
 795         {
 796                 StrBufSipLine(LineBuf, Buf, &LinePos);
 797                 if (StrLength(LineBuf) != 0) {
 798                         Node = NewNode(LineBuf);
 799                         if (Node != NULL) {
 800                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 801                         }
 802                 }
 803         } while (LinePos != StrBufNOTNULL);
 804         FreeStrBuf(&Buf);
 805         FreeStrBuf(&LineBuf);
 806         return Hash;
 807 }
 808
 809
 810 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 811 {
 812         const RoomNetCfg RecipientCfgs[] = {
 813                 listrecp,
 814                 digestrecp,
 815                 participate,
 816                 maxRoomNetCfg
 817         };
 818         int i;
 819         RoomNetCfgLine *nptr;
 820         size_t len;
 821
 822         len = strlen(Name);
 823         i = 0;
 824         while (RecipientCfgs[i] != maxRoomNetCfg)
 825         {
 826                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 827
 828                 while (nptr != NULL)
 829                 {
 830                         if ((StrLength(nptr->Value[0]) == len) &&
 831                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 832                         {
 833                                 return 1;
 834                         }
 835                         nptr = nptr->next;
 836                 }
 837         }
 838         return 0;
 839 }
 840
 841
 842
 843 int CtdlNetconfigCheckRoomaccess(
 844         char *errmsgbuf,
 845         size_t n,
 846         const char* RemoteIdentifier)
 847 {
 848         OneRoomNetCfg *RNCfg;
 849         int found;
 850
 851         if (RemoteIdentifier == NULL)
 852         {
 853                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 854                 return (ERROR + USERNAME_REQUIRED);
 855         }
 856
 857         begin_critical_section(S_NETCONFIGS);
 858         RNCfg = CtdlGetNetCfgForRoom (CC->room.QRnumber);
 859         if (RNCfg == NULL)
 860         {
 861                 end_critical_section(S_NETCONFIGS);
 862                 snprintf(errmsgbuf, n,
 863                          "This mailing list only accepts posts from subscribers.");
 864                 return (ERROR + NO_SUCH_USER);
 865         }
 866         found = is_recipient (RNCfg, RemoteIdentifier);
 867         end_critical_section(S_NETCONFIGS);
 868
 869         if (found) {
 870                 return (0);
 871         }
 872         else {
 873                 snprintf(errmsgbuf, n,
 874                          "This mailing list only accepts posts from subscribers.");
 875                 return (ERROR + NO_SUCH_USER);
 876         }
 877 }
 878
 879
 880
 881 /*
 882  * cmd_netp() - authenticate to the server as another Citadel node polling
 883  *            for network traffic
 884  */
 885 void cmd_netp(char *cmdbuf)
 886 {
 887         struct CitContext *CCC = CC;
 888         HashList *working_ignetcfg;
 889         char *node;
 890         StrBuf *NodeStr;
 891         long nodelen;
 892         int v;
 893         long lens[2];
 894         const char *strs[2];
 895
 896         const StrBuf *secret = NULL;
 897         const StrBuf *nexthop = NULL;
 898         char err_buf[SIZ] = "";
 899
 900         /* Authenticate */
 901         node = CCC->curr_user;
 902         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 903         NodeStr = NewStrBufPlain(node, nodelen);
 904         /* load the IGnet Configuration to check node validity */
 905         working_ignetcfg = CtdlLoadIgNetCfg();
 906         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 907         if (v != 0) {
 908                 snprintf(err_buf, sizeof err_buf,
 909                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 910                         node, CCC->cs_host, CCC->cs_addr
 911                 );
 912                 syslog(LOG_WARNING, "%s", err_buf);
 913                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 914
 915                 strs[0] = CCC->cs_addr;
 916                 lens[0] = strlen(CCC->cs_addr);
 917
 918                 strs[1] = "SRV_UNKNOWN";
 919                 lens[1] = sizeof("SRV_UNKNOWN" - 1);
 920
 921                 CtdlAideFPMessage(
 922                         err_buf,
 923                         "IGNet Networking.",
 924                         2, strs, (long*) &lens);
 925
 926                 DeleteHash(&working_ignetcfg);
 927                 FreeStrBuf(&NodeStr);
 928                 return;
 929         }
 930
 931         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 932         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 933                 snprintf(err_buf, sizeof err_buf,
 934                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 935                         CCC->cs_host, CCC->cs_addr, node
 936                 );
 937                 syslog(LOG_WARNING, "%s", err_buf);
 938                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 939
 940                 strs[0] = CCC->cs_addr;
 941                 lens[0] = strlen(CCC->cs_addr);
 942
 943                 strs[1] = "SRV_PW";
 944                 lens[1] = sizeof("SRV_PW" - 1);
 945
 946                 CtdlAideFPMessage(
 947                         err_buf,
 948                         "IGNet Networking.",
 949                         2, strs, (long*) &lens);
 950
 951                 DeleteHash(&working_ignetcfg);
 952                 FreeStrBuf(&NodeStr);
 953                 return;
 954         }
 955
 956         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 957                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 958                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 959                 DeleteHash(&working_ignetcfg);
 960                 FreeStrBuf(&NodeStr);
 961                 return;
 962         }
 963         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 964         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 965         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
 966                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 967         );
 968         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 969         DeleteHash(&working_ignetcfg);
 970         FreeStrBuf(&NodeStr);
 971 }
 972
 973
 974 /*-----------------------------------------------------------------------------*
 975  *                 Network maps: evaluate other nodes                          *
 976  *-----------------------------------------------------------------------------*/
 977
 978 void DeleteNetMap(void *vNetMap)
 979 {
 980         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 981         FreeStrBuf(&TheNetMap->NodeName);
 982         FreeStrBuf(&TheNetMap->NextHop);
 983         free(TheNetMap);
 984 }
 985
 986 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
 987 {
 988         const char *Pos = NULL;
 989         CtdlNetMap *NM;
 990
 991         /* we need at least 3 pipes and some other text so its invalid. */
 992         if (StrLength(SerializedNetMap) < 6)
 993                 return NULL;
 994         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
 995
 996         NM->NodeName=NewStrBuf();
 997         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
 998
 999         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
1000
1001         NM->NextHop=NewStrBuf();
1002         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
1003
1004         return NM;
1005 }
1006
1007 HashList* CtdlReadNetworkMap(void)
1008 {
1009         const char *LinePos;
1010         char       *Cfg;
1011         StrBuf     *Buf;
1012         StrBuf     *LineBuf;
1013         HashList   *Hash;
1014         CtdlNetMap     *TheNetMap;
1015
1016         Hash = NewHash(1, NULL);
1017         Cfg =  CtdlGetSysConfig(IGNETMAP);
1018         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
1019                 if (Cfg != NULL)
1020                         free(Cfg);
1021                 return Hash;
1022         }
1023
1024         Buf = NewStrBufPlain(Cfg, -1);
1025         free(Cfg);
1026         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
1027         LinePos = NULL;
1028         while (StrBufSipLine(Buf, LineBuf, &LinePos))
1029         {
1030                 TheNetMap = NewNetMap(LineBuf);
1031                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
1032                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
1033                 }
1034         }
1035         FreeStrBuf(&Buf);
1036         FreeStrBuf(&LineBuf);
1037         return Hash;
1038 }
1039
1040 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
1041 {
1042         void *vMap;
1043         const char *key;
1044         long len;
1045         StrBuf *Ret = NewStrBuf();
1046         HashPos *Pos = GetNewHashPos(Map, 0);
1047
1048         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
1049         {
1050                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
1051                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
1052                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1053
1054                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
1055                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1056
1057                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
1058                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
1059         }
1060         DeleteHashPos(&Pos);
1061         return Ret;
1062 }
1063
1064
1065 /*
1066  * Learn topology from path fields
1067  */
1068 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
1069 {
1070         CtdlNetMap *pNM = NULL;
1071         void *vptr;
1072         char nexthop[256];
1073         CtdlNetMap *nmptr;
1074
1075         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
1076             (vptr != NULL))/* TODO: is the NodeName Uniq? */
1077         {
1078                 pNM = (CtdlNetMap*)vptr;
1079                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
1080                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
1081                         pNM->lastcontact = time(NULL);
1082                         (*netmap_changed) ++;
1083                         return;
1084                 }
1085         }
1086
1087         /* If we got here then it's not in the map, so add it. */
1088         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
1089         nmptr->NodeName = NewStrBufPlain(node, -1);
1090         nmptr->lastcontact = time(NULL);
1091         nmptr->NextHop = NewStrBuf ();
1092         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
1093         /* TODO: is the NodeName Uniq? */
1094         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
1095         (*netmap_changed) ++;
1096 }
1097
1098
1099 /*
1100  * Check the network map and determine whether the supplied node name is
1101  * valid.  If it is not a neighbor node, supply the name of a neighbor node
1102  * which is the next hop.  If it *is* a neighbor node, we also fill in the
1103  * shared secret.
1104  */
1105 int CtdlIsValidNode(const StrBuf **nexthop,
1106                     const StrBuf **secret,
1107                     StrBuf *node,
1108                     HashList *IgnetCfg,
1109                     HashList *the_netmap)
1110 {
1111         void *vNetMap;
1112         void *vNodeConf;
1113         CtdlNodeConf *TheNode;
1114         CtdlNetMap *TheNetMap;
1115
1116         if (StrLength(node) == 0) {
1117                 return(-1);
1118         }
1119
1120         /*
1121          * First try the neighbor nodes
1122          */
1123         if (GetCount(IgnetCfg) == 0) {
1124                 syslog(LOG_INFO, "IgnetCfg is empty!\n");
1125                 if (nexthop != NULL) {
1126                         *nexthop = NULL;
1127                 }
1128                 return(-1);
1129         }
1130
1131         /* try to find a neigbour with the name 'node' */
1132         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
1133             (vNodeConf != NULL))
1134         {
1135                 TheNode = (CtdlNodeConf*)vNodeConf;
1136                 if (secret != NULL)
1137                         *secret = TheNode->Secret;
1138                 return 0;               /* yup, it's a direct neighbor */
1139         }
1140
1141         /*
1142          * If we get to this point we have to see if we know the next hop
1143          *//* TODO: is the NodeName Uniq? */
1144         if ((GetCount(the_netmap) > 0) &&
1145             (GetHash(the_netmap, SKEY(node), &vNetMap)))
1146         {
1147                 TheNetMap = (CtdlNetMap*)vNetMap;
1148                 if (nexthop != NULL)
1149                         *nexthop = TheNetMap->NextHop;
1150                 return(0);
1151         }
1152
1153         /*
1154          * If we get to this point, the supplied node name is bogus.
1155          */
1156         syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
1157         return(-1);
1158 }
1159
1160
1161 void destroy_network_cfgs(void)
1162 {
1163         HashList *pCfgTypeHash = CfgTypeHash;
1164         HashList *pRoomConfigs = RoomConfigs;
1165
1166         CfgTypeHash = NULL;
1167         RoomConfigs = NULL;
1168
1169         DeleteHash(&pCfgTypeHash);
1170         DeleteHash(&pRoomConfigs);
1171 }
1172
1173 /*
1174  * Module entry point
1175  */
1176 CTDL_MODULE_INIT(netconfig)
1177 {
1178         if (!threading)
1179         {
1180                 CtdlRegisterCleanupHook(destroy_network_cfgs);
1181                 LoadAllNetConfigs ();
1182                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1183                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1184                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1185         }
1186         return "netconfig";
1187 }