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 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg);
  36
  37 HashList *CfgTypeHash = NULL;
  38 HashList *RoomConfigs = NULL;
  39 /*-----------------------------------------------------------------------------*
  40  *                       Per room network configs                              *
  41  *-----------------------------------------------------------------------------*/
  42 void RegisterRoomCfgType(const char* Name, long len, RoomNetCfg eCfg, CfgLineParser p, int uniq,  int nSegments, CfgLineSerializer s, CfgLineDeAllocator d)
  43 {
  44         CfgLineType *pCfg;
  45
  46         pCfg = (CfgLineType*) malloc(sizeof(CfgLineType));
  47         pCfg->Parser = p;
  48         pCfg->Serializer = s;
  49         pCfg->DeAllocator = d;
  50         pCfg->C = eCfg;
  51         pCfg->Str.Key = Name;
  52         pCfg->Str.len = len;
  53         pCfg->IsSingleLine = uniq;
  54         pCfg->nSegments = nSegments;
  55         if (CfgTypeHash == NULL)
  56                 CfgTypeHash = NewHash(1, NULL);
  57         Put(CfgTypeHash, Name, len, pCfg, NULL);
  58 }
  59
  60
  61 const CfgLineType *GetCfgTypeByStr(const char *Key, long len)
  62 {
  63         void *pv;
  64
  65         if (GetHash(CfgTypeHash, Key, len, &pv) && (pv != NULL))
  66         {
  67                 return (const CfgLineType *) pv;
  68         }
  69         else
  70         {
  71                 return NULL;
  72         }
  73 }
  74
  75 const CfgLineType *GetCfgTypeByEnum(RoomNetCfg eCfg, HashPos *It)
  76 {
  77         const char *Key;
  78         long len;
  79         void *pv;
  80         CfgLineType *pCfg;
  81
  82         RewindHashPos(CfgTypeHash, It, 1);
  83         while (GetNextHashPos(CfgTypeHash, It, &len, &Key, &pv) && (pv != NULL))
  84         {
  85                 pCfg = (CfgLineType*) pv;
  86                 if (pCfg->C == eCfg)
  87                         return pCfg;
  88         }
  89         return NULL;
  90 }
  91 void ParseGeneric(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCfg)
  92 {
  93         RoomNetCfgLine *nptr;
  94         int i;
  95
  96         nptr = (RoomNetCfgLine *)
  97                 malloc(sizeof(RoomNetCfgLine));
  98         nptr->next = OneRNCfg->NetConfigs[ThisOne->C];
  99         nptr->Value = malloc(sizeof(StrBuf*) * ThisOne->nSegments);
 100         nptr->nValues = 0;
 101         memset(nptr->Value, 0, sizeof(StrBuf*) * ThisOne->nSegments);
 102         if (ThisOne->nSegments == 1)
 103         {
 104                 nptr->Value[0] = NewStrBufPlain(LinePos, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 105                 nptr->nValues = 1;
 106         }
 107         else for (i = 0; i < ThisOne->nSegments; i++)
 108         {
 109                 nptr->nValues++;
 110                 nptr->Value[i] = NewStrBufPlain(NULL, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 111                 StrBufExtract_NextToken(nptr->Value[i], Line, &LinePos, '|');
 112         }
 113
 114         OneRNCfg->NetConfigs[ThisOne->C] = nptr;
 115 }
 116
 117 void SerializeGeneric(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *OneRNCfg, RoomNetCfgLine *data)
 118 {
 119         int i;
 120
 121         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 122         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 123         for (i = 0; i < ThisOne->nSegments; i++)
 124         {
 125                 StrBufAppendBuf(OutputBuffer, data->Value[i], 0);
 126                 if (i + 1 < ThisOne->nSegments)
 127                         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 128         }
 129         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 130 }
 131
 132 void DeleteGenericCfgLine(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 133 {
 134         int i;
 135
 136         if (*data == NULL)
 137                 return;
 138
 139         for (i = 0; i < (*data)->nValues; i++)
 140         {
 141                 FreeStrBuf(&(*data)->Value[i]);
 142         }
 143         free ((*data)->Value);
 144         free(*data);
 145         *data = NULL;
 146 }
 147 RoomNetCfgLine *DuplicateOneGenericCfgLine(const RoomNetCfgLine *data)
 148 {
 149         RoomNetCfgLine *NewData;
 150
 151         NewData = (RoomNetCfgLine*)malloc(sizeof(RoomNetCfgLine));
 152         int i;
 153         NewData->Value = (StrBuf **)malloc(sizeof(StrBuf*) * data->nValues);
 154
 155         for (i = 0; i < data->nValues; i++)
 156         {
 157                 NewData->Value[i] = NewStrBufDup(data->Value[i]);
 158         }
 159         return NewData;
 160 }
 161 int ReadRoomNetConfigFile(OneRoomNetCfg **pOneRNCfg, char *filename)
 162 {
 163         int fd;
 164         const char *ErrStr = NULL;
 165         const char *Pos;
 166         const CfgLineType *pCfg;
 167         StrBuf *Line;
 168         StrBuf *InStr;
 169         OneRoomNetCfg *OneRNCfg = NULL;
 170
 171         fd = open(filename, O_NONBLOCK|O_RDONLY);
 172         if (fd == -1) {
 173                 *pOneRNCfg = NULL;
 174                 return 0;
 175         }
 176         if (*pOneRNCfg != NULL)
 177         {
 178                 OneRNCfg = *pOneRNCfg;
 179                 FreeRoomNetworkStructContent (OneRNCfg);
 180         }
 181         else
 182                 OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 183         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 184         *pOneRNCfg = OneRNCfg;
 185         Line = NewStrBuf();
 186         InStr = NewStrBuf();
 187
 188         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 189                 if (StrLength(Line) == 0)
 190                         continue;
 191                 Pos = NULL;
 192                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 193
 194                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 195                 if (pCfg != NULL)
 196                 {
 197                         pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 198                 }
 199                 else
 200                 {
 201                         if (OneRNCfg->misc == NULL)
 202                         {
 203                                 OneRNCfg->misc = NewStrBufDup(Line);
 204                         }
 205                         else
 206                         {
 207                                 if(StrLength(OneRNCfg->misc) > 0)
 208                                         StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 209                                 StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 210                         }
 211                 }
 212         }
 213         if (fd > 0)
 214                 close(fd);
 215         FreeStrBuf(&InStr);
 216         FreeStrBuf(&Line);
 217         return 1;
 218 }
 219
 220 int SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, char *filename)
 221 {
 222         RoomNetCfg eCfg;
 223         StrBuf *Cfg = NULL;
 224         StrBuf *OutBuffer = NULL;
 225         char tempfilename[PATH_MAX];
 226         int TmpFD;
 227         long len;
 228         time_t unixtime;
 229         struct timeval tv;
 230         long reltid; /* if we don't have SYS_gettid, use "random" value */
 231         int rc;
 232         HashPos *CfgIt;
 233
 234         len = strlen(filename);
 235         memcpy(tempfilename, filename, len + 1);
 236
 237 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 238         reltid = syscall(SYS_gettid);
 239 #endif
 240         gettimeofday(&tv, NULL);
 241         /* Promote to time_t; types differ on some OSes (like darwin) */
 242         unixtime = tv.tv_sec;
 243
 244         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 245         errno = 0;
 246         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 247         Cfg = NewStrBuf();
 248         if ((TmpFD < 0) || (errno != 0)) {
 249                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 250                         filename, strerror(errno));
 251                 unlink(tempfilename);
 252                 FreeStrBuf(&Cfg);
 253                 return 0;
 254         }
 255         else {
 256                 OutBuffer = NewStrBuf();
 257                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 258                 fchown(TmpFD, config.c_ctdluid, 0);
 259                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 260                 {
 261                         const CfgLineType *pCfg;
 262                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 263                         if (pCfg->IsSingleLine)
 264                         {
 265                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 266                         }
 267                         else
 268                         {
 269                                 RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 270                                 while (pName != NULL)
 271                                 {
 272                                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 273                                         pName = pName->next;
 274                                 }
 275
 276
 277                         }
 278
 279                 }
 280                 DeleteHashPos(&CfgIt);
 281
 282
 283                 if (OneRNCfg->misc != NULL) {
 284                         StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 285                 }
 286
 287                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 288                 if ((rc >=0 ) && (rc == StrLength(OutBuffer)))
 289                 {
 290                         close(TmpFD);
 291                         rename(tempfilename, filename);
 292                         rc = 1;
 293                 }
 294                 else {
 295                         syslog(LOG_EMERG,
 296                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 297                                       tempfilename,
 298                                       strerror(errno));
 299                         close(TmpFD);
 300                         unlink(tempfilename);
 301                         rc = 0;
 302                 }
 303                 FreeStrBuf(&OutBuffer);
 304
 305         }
 306         FreeStrBuf(&Cfg);
 307         return rc;
 308 }
 309
 310 void SaveModifiedRooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 311 {
 312         char filename[PATH_MAX];
 313
 314         if (OneRNCfg->changed)
 315         {
 316                 assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 317                 SaveRoomNetConfigFile(OneRNCfg, filename);
 318                 OneRNCfg->changed = 0;
 319         }
 320 }
 321 void SaveChangedConfigs(void)
 322 {
 323         CtdlForEachNetCfgRoom(SaveModifiedRooms,
 324                               NULL,
 325                               maxRoomNetCfg);
 326 }
 327
 328
 329 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 330 {
 331         int new = 0;
 332         RoomNetCfgLine **pLine;
 333         char filename[PATH_MAX];
 334
 335         if (OneRNCfg == NULL)
 336         {
 337                 new = 1;
 338                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 339                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 340         }
 341         pLine = &OneRNCfg->NetConfigs[LineType];
 342
 343         while(*pLine != NULL) pLine = &((*pLine)->next);
 344         *pLine = Line;
 345
 346         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 347         SaveRoomNetConfigFile(OneRNCfg, filename);
 348         OneRNCfg->changed = 0;
 349         if (new)
 350         {
 351                 Put(RoomConfigs, LKEY(qrbuf->QRnumber), OneRNCfg, vFreeRoomNetworkStruct);
 352         }
 353 }
 354
 355 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 356 {
 357         RoomNetCfg eCfg;
 358         HashPos *CfgIt;
 359
 360         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 361         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 362         {
 363                 const CfgLineType *pCfg;
 364                 RoomNetCfgLine *pNext, *pName;
 365
 366                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 367                 pName= OneRNCfg->NetConfigs[eCfg];
 368                 while (pName != NULL)
 369                 {
 370                         pNext = pName->next;
 371                         if (pCfg != NULL)
 372                         {
 373                                 pCfg->DeAllocator(pCfg, &pName);
 374                         }
 375                         else
 376                         {
 377                                 DeleteGenericCfgLine(NULL, &pName);
 378                         }
 379                         pName = pNext;
 380                 }
 381         }
 382         DeleteHashPos(&CfgIt);
 383
 384         FreeStrBuf(&OneRNCfg->Sender);
 385         FreeStrBuf(&OneRNCfg->RoomInfo);
 386         FreeStrBuf(&OneRNCfg->misc);
 387 }
 388 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 389 {
 390         OneRoomNetCfg *OneRNCfg;
 391         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 392         FreeRoomNetworkStructContent(OneRNCfg);
 393         free(OneRNCfg);
 394 }
 395 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 396 {
 397         vFreeRoomNetworkStruct(*pOneRNCfg);
 398         *pOneRNCfg=NULL;
 399 }
 400
 401 OneRoomNetCfg* CtdlGetNetCfgForRoom(long QRNumber)
 402 {
 403         void *pv;
 404         GetHash(RoomConfigs, LKEY(QRNumber), &pv);
 405         return (OneRoomNetCfg*)pv;
 406 }
 407
 408
 409 void LoadAllNetConfigs(void)
 410 {
 411         DIR *filedir = NULL;
 412         struct dirent *d;
 413         struct dirent *filedir_entry;
 414         int d_type = 0;
 415         int d_namelen;
 416         long RoomNumber;
 417         OneRoomNetCfg *OneRNCfg;
 418         int IsNumOnly;
 419         const char *pch;
 420         char path[PATH_MAX];
 421
 422         RoomConfigs = NewHash(1, NULL);
 423         filedir = opendir (ctdl_netcfg_dir);
 424         if (filedir == NULL) {
 425                 return ; /// todo: panic!
 426         }
 427
 428         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 429         if (d == NULL) {
 430                 closedir(filedir);
 431                 return ;
 432         }
 433
 434         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 435                (filedir_entry != NULL))
 436         {
 437 #ifdef _DIRENT_HAVE_D_NAMLEN
 438                 d_namelen = filedir_entry->d_namelen;
 439 #else
 440                 d_namelen = strlen(filedir_entry->d_name);
 441 #endif
 442
 443 #ifdef _DIRENT_HAVE_D_TYPE
 444                 d_type = filedir_entry->d_type;
 445 #else
 446
 447 #ifndef DT_UNKNOWN
 448 #define DT_UNKNOWN     0
 449 #define DT_DIR         4
 450 #define DT_REG         8
 451 #define DT_LNK         10
 452
 453 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 454 #define DTTOIF(dirtype)        ((dirtype) << 12)
 455 #endif
 456                 d_type = DT_UNKNOWN;
 457 #endif
 458                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 459                         continue; /* Ignore backup files... */
 460
 461                 if ((d_namelen == 1) &&
 462                     (filedir_entry->d_name[0] == '.'))
 463                         continue;
 464
 465                 if ((d_namelen == 2) &&
 466                     (filedir_entry->d_name[0] == '.') &&
 467                     (filedir_entry->d_name[1] == '.'))
 468                         continue;
 469
 470                 snprintf(path, PATH_MAX, "%s/%s",
 471                          ctdl_netcfg_dir, filedir_entry->d_name);
 472
 473                 if (d_type == DT_UNKNOWN) {
 474                         struct stat s;
 475                         if (lstat(path, &s) == 0) {
 476                                 d_type = IFTODT(s.st_mode);
 477                         }
 478                 }
 479
 480                 switch (d_type)
 481                 {
 482                 case DT_DIR:
 483                         break;
 484                 case DT_LNK: /* TODO: check whether its a file or a directory */
 485                 case DT_REG:
 486                         IsNumOnly = 1;
 487                         pch = filedir_entry->d_name;
 488                         while (*pch != '\0')
 489                         {
 490                                 if (!isdigit(*pch))
 491                                 {
 492                                         IsNumOnly = 0;
 493                                 }
 494                                 pch ++;
 495                         }
 496                         if (IsNumOnly)
 497                         {
 498                                 OneRNCfg = NULL;
 499                                 RoomNumber = atol(filedir_entry->d_name);
 500                                 ReadRoomNetConfigFile(&OneRNCfg, path);
 501
 502                                 if (OneRNCfg != NULL)
 503                                         Put(RoomConfigs, LKEY(RoomNumber), OneRNCfg, vFreeRoomNetworkStruct);
 504                                 /* syslog(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 505                         }
 506                         break;
 507                 default:
 508                         break;
 509                 }
 510
 511
 512         }
 513         free(d);
 514         closedir(filedir);
 515 }
 516
 517
 518 /*-----------------------------------------------------------------------------*
 519  *              Per room network configs : exchange with client                *
 520  *-----------------------------------------------------------------------------*/
 521 void cmd_gnet(char *argbuf)
 522 {
 523         char filename[PATH_MAX];
 524         char buf[SIZ];
 525         FILE *fp;
 526
 527
 528         if (!IsEmptyStr(argbuf))
 529         {
 530                 if (CtdlAccessCheck(ac_aide)) return;
 531                 if (strcmp(argbuf, FILE_MAILALIAS))
 532                 {
 533                         cprintf("%d No such file or directory\n",
 534                                 ERROR + INTERNAL_ERROR);
 535                         return;
 536                 }
 537                 safestrncpy(filename, file_mail_aliases, sizeof(filename));
 538                 cprintf("%d Settings for <%s>\n",
 539                         LISTING_FOLLOWS,
 540                         filename);
 541         }
 542         else
 543         {
 544                 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 545                         /* users can edit the netconfigs for their own mailbox rooms */
 546                 }
 547                 else if (CtdlAccessCheck(ac_room_aide)) return;
 548
 549                 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 550                 cprintf("%d Network settings for room #%ld <%s>\n",
 551                         LISTING_FOLLOWS,
 552                         CC->room.QRnumber, CC->room.QRname);
 553         }
 554
 555         fp = fopen(filename, "r");
 556         if (fp != NULL) {
 557                 while (fgets(buf, sizeof buf, fp) != NULL) {
 558                         buf[strlen(buf)-1] = 0;
 559                         cprintf("%s\n", buf);
 560                 }
 561                 fclose(fp);
 562         }
 563
 564         cprintf("000\n");
 565 }
 566
 567 #define nForceAliases 5
 568 const ConstStr ForceAliases[nForceAliases] = {
 569         {HKEY("bbs,")},
 570         {HKEY("root,")},
 571         {HKEY("Auto,")},
 572         {HKEY("postmaster,")},
 573         {HKEY("abuse,")}
 574 };
 575
 576 void cmd_snet(char *argbuf)
 577 {
 578         struct CitContext *CCC = CC;
 579         char tempfilename[PATH_MAX];
 580         char filename[PATH_MAX];
 581         int TmpFD;
 582         StrBuf *Line;
 583         struct stat StatBuf;
 584         long len;
 585         int rc;
 586         int IsMailAlias = 0;
 587         int MailAliasesFound[nForceAliases];
 588
 589         unbuffer_output();
 590
 591         if (!IsEmptyStr(argbuf))
 592         {
 593                 if (CtdlAccessCheck(ac_aide)) return;
 594                 if (strcmp(argbuf, FILE_MAILALIAS))
 595                 {
 596                         cprintf("%d No such file or directory\n",
 597                                 ERROR + INTERNAL_ERROR);
 598                         return;
 599                 }
 600                 len = safestrncpy(filename, file_mail_aliases, sizeof(filename));
 601                 memset(MailAliasesFound, 0, sizeof(MailAliasesFound));
 602                 memcpy(tempfilename, filename, len + 1);
 603                 IsMailAlias = 1;
 604         }
 605         else
 606         {
 607                 if ( (CCC->room.QRflags & QR_MAILBOX) && (CCC->user.usernum == atol(CCC->room.QRname)) ) {
 608                         /* users can edit the netconfigs for their own mailbox rooms */
 609                 }
 610                 else if (CtdlAccessCheck(ac_room_aide)) return;
 611
 612                 len = assoc_file_name(filename, sizeof filename, &CCC->room, ctdl_netcfg_dir);
 613                 memcpy(tempfilename, filename, len + 1);
 614         }
 615         memset(&StatBuf, 0, sizeof(struct stat));
 616         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 617                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 618
 619         sprintf(tempfilename + len, ".%d", CCC->cs_pid);
 620         errno = 0;
 621         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 622
 623         if ((TmpFD > 0) && (errno == 0))
 624         {
 625                 char *tmp = malloc(StatBuf.st_size * 2);
 626                 memset(tmp, ' ', StatBuf.st_size * 2);
 627                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 628                 free(tmp);
 629                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 630                 {
 631                         close(TmpFD);
 632                         cprintf("%d Unable to allocate the space required for %s: %s\n",
 633                                 ERROR + INTERNAL_ERROR,
 634                                 tempfilename,
 635                                 strerror(errno));
 636                         unlink(tempfilename);
 637                         return;
 638                 }
 639                 lseek(TmpFD, SEEK_SET, 0);
 640         }
 641         else {
 642                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 643                         ERROR + INTERNAL_ERROR,
 644                         tempfilename,
 645                         strerror(errno));
 646                 unlink(tempfilename);
 647                 return;
 648         }
 649         Line = NewStrBuf();
 650
 651         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 652
 653         len = 0;
 654         while (rc = CtdlClientGetLine(Line),
 655                (rc >= 0))
 656         {
 657                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 658                         break;
 659                 if (IsMailAlias)
 660                 {
 661                         int i;
 662
 663                         for (i = 0; i < nForceAliases; i++)
 664                         {
 665                                 if ((!MailAliasesFound[i]) &&
 666                                     (strncmp(ForceAliases[i].Key,
 667                                              ChrPtr(Line),
 668                                              ForceAliases[i].len) == 0)
 669                                         )
 670                                     {
 671                                             MailAliasesFound[i] = 1;
 672                                             break;
 673                                     }
 674                         }
 675                 }
 676
 677                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 678                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 679                 len += StrLength(Line);
 680         }
 681         FreeStrBuf(&Line);
 682         ftruncate(TmpFD, len);
 683         close(TmpFD);
 684
 685         if (IsMailAlias)
 686         {
 687                 int i, state;
 688                 /*
 689                  * Sanity check whether all aliases required by the RFCs were set
 690                  * else bail out.
 691                  */
 692                 state = 1;
 693                 for (i = 0; i < nForceAliases; i++)
 694                 {
 695                         if (!MailAliasesFound[i])
 696                                 state = 0;
 697                 }
 698                 if (state == 0)
 699                 {
 700                         cprintf("%d won't do this - you're missing an RFC required alias.\n",
 701                                 ERROR + INTERNAL_ERROR);
 702                         unlink(tempfilename);
 703                         return;
 704                 }
 705         }
 706
 707         /* Now copy the temp file to its permanent location.
 708          * (We copy instead of link because they may be on different filesystems)
 709          */
 710         begin_critical_section(S_NETCONFIGS);
 711         rename(tempfilename, filename);
 712         if (!IsMailAlias)
 713         {
 714                 OneRoomNetCfg *RNCfg;
 715                 RNCfg = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 716                 if (RNCfg != NULL)
 717                 {
 718                         FreeRoomNetworkStructContent(RNCfg);
 719                         ReadRoomNetConfigFile(&RNCfg, filename);
 720                 }
 721                 else
 722                 {
 723                         ReadRoomNetConfigFile(&RNCfg, filename);
 724                         Put(RoomConfigs, LKEY(CCC->room.QRnumber), RNCfg, vFreeRoomNetworkStruct);
 725                 }
 726         }
 727         end_critical_section(S_NETCONFIGS);
 728 }
 729
 730
 731 /*-----------------------------------------------------------------------------*
 732  *                       Per node network configs                              *
 733  *-----------------------------------------------------------------------------*/
 734 void DeleteCtdlNodeConf(void *vNode)
 735 {
 736         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 737         FreeStrBuf(&Node->NodeName);
 738         FreeStrBuf(&Node->Secret);
 739         FreeStrBuf(&Node->Host);
 740         FreeStrBuf(&Node->Port);
 741         free(Node);
 742 }
 743
 744 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 745 {
 746         const char *Pos = NULL;
 747         CtdlNodeConf *Node;
 748
 749         /* we need at least 4 pipes and some other text so its invalid. */
 750         if (StrLength(SerializedNode) < 8)
 751                 return NULL;
 752         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 753
 754         Node->DeleteMe = 0;
 755
 756         Node->NodeName=NewStrBuf();
 757         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 758
 759         Node->Secret=NewStrBuf();
 760         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 761
 762         Node->Host=NewStrBuf();
 763         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 764
 765         Node->Port=NewStrBuf();
 766         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 767         return Node;
 768 }
 769
 770
 771 /*
 772  * Load or refresh the Citadel network (IGnet) configuration for this node.
 773  */
 774 HashList* CtdlLoadIgNetCfg(void)
 775 {
 776         const char *LinePos;
 777         char       *Cfg;
 778         StrBuf     *Buf;
 779         StrBuf     *LineBuf;
 780         HashList   *Hash;
 781         CtdlNodeConf   *Node;
 782
 783         Cfg =  CtdlGetSysConfig(IGNETCFG);
 784         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 785                 if (Cfg != NULL)
 786                         free(Cfg);
 787                 return NULL;
 788         }
 789
 790         Hash = NewHash(1, NULL);
 791         Buf = NewStrBufPlain(Cfg, -1);
 792         free(Cfg);
 793         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 794         LinePos = NULL;
 795         do
 796         {
 797                 StrBufSipLine(LineBuf, Buf, &LinePos);
 798                 if (StrLength(LineBuf) != 0) {
 799                         Node = NewNode(LineBuf);
 800                         if (Node != NULL) {
 801                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 802                         }
 803                 }
 804         } while (LinePos != StrBufNOTNULL);
 805         FreeStrBuf(&Buf);
 806         FreeStrBuf(&LineBuf);
 807         return Hash;
 808 }
 809
 810
 811 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 812 {
 813         const RoomNetCfg RecipientCfgs[] = {
 814                 listrecp,
 815                 digestrecp,
 816                 participate,
 817                 maxRoomNetCfg
 818         };
 819         int i;
 820         RoomNetCfgLine *nptr;
 821         size_t len;
 822
 823         len = strlen(Name);
 824         i = 0;
 825         while (RecipientCfgs[i] != maxRoomNetCfg)
 826         {
 827                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 828
 829                 while (nptr != NULL)
 830                 {
 831                         if ((StrLength(nptr->Value[0]) == len) &&
 832                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 833                         {
 834                                 return 1;
 835                         }
 836                         nptr = nptr->next;
 837                 }
 838         }
 839         return 0;
 840 }
 841
 842
 843
 844 int CtdlNetconfigCheckRoomaccess(
 845         char *errmsgbuf,
 846         size_t n,
 847         const char* RemoteIdentifier)
 848 {
 849         OneRoomNetCfg *RNCfg;
 850         int found;
 851
 852         if (RemoteIdentifier == NULL)
 853         {
 854                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 855                 return (ERROR + USERNAME_REQUIRED);
 856         }
 857
 858         begin_critical_section(S_NETCONFIGS);
 859         RNCfg = CtdlGetNetCfgForRoom (CC->room.QRnumber);
 860         if (RNCfg == NULL)
 861         {
 862                 end_critical_section(S_NETCONFIGS);
 863                 snprintf(errmsgbuf, n,
 864                          "This mailing list only accepts posts from subscribers.");
 865                 return (ERROR + NO_SUCH_USER);
 866         }
 867         found = is_recipient (RNCfg, RemoteIdentifier);
 868         end_critical_section(S_NETCONFIGS);
 869
 870         if (found) {
 871                 return (0);
 872         }
 873         else {
 874                 snprintf(errmsgbuf, n,
 875                          "This mailing list only accepts posts from subscribers.");
 876                 return (ERROR + NO_SUCH_USER);
 877         }
 878 }
 879
 880
 881
 882 /*
 883  * cmd_netp() - authenticate to the server as another Citadel node polling
 884  *            for network traffic
 885  */
 886 void cmd_netp(char *cmdbuf)
 887 {
 888         struct CitContext *CCC = CC;
 889         HashList *working_ignetcfg;
 890         char *node;
 891         StrBuf *NodeStr;
 892         long nodelen;
 893         int v;
 894         long lens[2];
 895         const char *strs[2];
 896
 897         const StrBuf *secret = NULL;
 898         const StrBuf *nexthop = NULL;
 899         char err_buf[SIZ] = "";
 900
 901         /* Authenticate */
 902         node = CCC->curr_user;
 903         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 904         NodeStr = NewStrBufPlain(node, nodelen);
 905         /* load the IGnet Configuration to check node validity */
 906         working_ignetcfg = CtdlLoadIgNetCfg();
 907         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 908         if (v != 0) {
 909                 snprintf(err_buf, sizeof err_buf,
 910                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 911                         node, CCC->cs_host, CCC->cs_addr
 912                 );
 913                 syslog(LOG_WARNING, "%s", err_buf);
 914                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 915
 916                 strs[0] = CCC->cs_addr;
 917                 lens[0] = strlen(CCC->cs_addr);
 918
 919                 strs[1] = "SRV_UNKNOWN";
 920                 lens[1] = sizeof("SRV_UNKNOWN" - 1);
 921
 922                 CtdlAideFPMessage(
 923                         err_buf,
 924                         "IGNet Networking.",
 925                         2, strs, (long*) &lens);
 926
 927                 DeleteHash(&working_ignetcfg);
 928                 FreeStrBuf(&NodeStr);
 929                 return;
 930         }
 931
 932         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 933         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 934                 snprintf(err_buf, sizeof err_buf,
 935                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 936                         CCC->cs_host, CCC->cs_addr, node
 937                 );
 938                 syslog(LOG_WARNING, "%s", err_buf);
 939                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 940
 941                 strs[0] = CCC->cs_addr;
 942                 lens[0] = strlen(CCC->cs_addr);
 943
 944                 strs[1] = "SRV_PW";
 945                 lens[1] = sizeof("SRV_PW" - 1);
 946
 947                 CtdlAideFPMessage(
 948                         err_buf,
 949                         "IGNet Networking.",
 950                         2, strs, (long*) &lens);
 951
 952                 DeleteHash(&working_ignetcfg);
 953                 FreeStrBuf(&NodeStr);
 954                 return;
 955         }
 956
 957         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 958                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 959                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 960                 DeleteHash(&working_ignetcfg);
 961                 FreeStrBuf(&NodeStr);
 962                 return;
 963         }
 964         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 965         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 966         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
 967                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 968         );
 969         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 970         DeleteHash(&working_ignetcfg);
 971         FreeStrBuf(&NodeStr);
 972 }
 973
 974
 975 /*-----------------------------------------------------------------------------*
 976  *                 Network maps: evaluate other nodes                          *
 977  *-----------------------------------------------------------------------------*/
 978
 979 void DeleteNetMap(void *vNetMap)
 980 {
 981         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 982         FreeStrBuf(&TheNetMap->NodeName);
 983         FreeStrBuf(&TheNetMap->NextHop);
 984         free(TheNetMap);
 985 }
 986
 987 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
 988 {
 989         const char *Pos = NULL;
 990         CtdlNetMap *NM;
 991
 992         /* we need at least 3 pipes and some other text so its invalid. */
 993         if (StrLength(SerializedNetMap) < 6)
 994                 return NULL;
 995         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
 996
 997         NM->NodeName=NewStrBuf();
 998         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
 999
1000         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
1001
1002         NM->NextHop=NewStrBuf();
1003         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
1004
1005         return NM;
1006 }
1007
1008 HashList* CtdlReadNetworkMap(void)
1009 {
1010         const char *LinePos;
1011         char       *Cfg;
1012         StrBuf     *Buf;
1013         StrBuf     *LineBuf;
1014         HashList   *Hash;
1015         CtdlNetMap     *TheNetMap;
1016
1017         Hash = NewHash(1, NULL);
1018         Cfg =  CtdlGetSysConfig(IGNETMAP);
1019         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
1020                 if (Cfg != NULL)
1021                         free(Cfg);
1022                 return Hash;
1023         }
1024
1025         Buf = NewStrBufPlain(Cfg, -1);
1026         free(Cfg);
1027         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
1028         LinePos = NULL;
1029         while (StrBufSipLine(Buf, LineBuf, &LinePos))
1030         {
1031                 TheNetMap = NewNetMap(LineBuf);
1032                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
1033                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
1034                 }
1035         }
1036         FreeStrBuf(&Buf);
1037         FreeStrBuf(&LineBuf);
1038         return Hash;
1039 }
1040
1041 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
1042 {
1043         void *vMap;
1044         const char *key;
1045         long len;
1046         StrBuf *Ret = NewStrBuf();
1047         HashPos *Pos = GetNewHashPos(Map, 0);
1048
1049         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
1050         {
1051                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
1052                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
1053                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1054
1055                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
1056                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1057
1058                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
1059                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
1060         }
1061         DeleteHashPos(&Pos);
1062         return Ret;
1063 }
1064
1065
1066 /*
1067  * Learn topology from path fields
1068  */
1069 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
1070 {
1071         CtdlNetMap *pNM = NULL;
1072         void *vptr;
1073         char nexthop[256];
1074         CtdlNetMap *nmptr;
1075
1076         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
1077             (vptr != NULL))/* TODO: is the NodeName Uniq? */
1078         {
1079                 pNM = (CtdlNetMap*)vptr;
1080                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
1081                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
1082                         pNM->lastcontact = time(NULL);
1083                         (*netmap_changed) ++;
1084                         return;
1085                 }
1086         }
1087
1088         /* If we got here then it's not in the map, so add it. */
1089         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
1090         nmptr->NodeName = NewStrBufPlain(node, -1);
1091         nmptr->lastcontact = time(NULL);
1092         nmptr->NextHop = NewStrBuf ();
1093         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
1094         /* TODO: is the NodeName Uniq? */
1095         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
1096         (*netmap_changed) ++;
1097 }
1098
1099
1100 /*
1101  * Check the network map and determine whether the supplied node name is
1102  * valid.  If it is not a neighbor node, supply the name of a neighbor node
1103  * which is the next hop.  If it *is* a neighbor node, we also fill in the
1104  * shared secret.
1105  */
1106 int CtdlIsValidNode(const StrBuf **nexthop,
1107                     const StrBuf **secret,
1108                     StrBuf *node,
1109                     HashList *IgnetCfg,
1110                     HashList *the_netmap)
1111 {
1112         void *vNetMap;
1113         void *vNodeConf;
1114         CtdlNodeConf *TheNode;
1115         CtdlNetMap *TheNetMap;
1116
1117         if (StrLength(node) == 0) {
1118                 return(-1);
1119         }
1120
1121         /*
1122          * First try the neighbor nodes
1123          */
1124         if (GetCount(IgnetCfg) == 0) {
1125                 syslog(LOG_INFO, "IgnetCfg is empty!\n");
1126                 if (nexthop != NULL) {
1127                         *nexthop = NULL;
1128                 }
1129                 return(-1);
1130         }
1131
1132         /* try to find a neigbour with the name 'node' */
1133         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
1134             (vNodeConf != NULL))
1135         {
1136                 TheNode = (CtdlNodeConf*)vNodeConf;
1137                 if (secret != NULL)
1138                         *secret = TheNode->Secret;
1139                 return 0;               /* yup, it's a direct neighbor */
1140         }
1141
1142         /*
1143          * If we get to this point we have to see if we know the next hop
1144          *//* TODO: is the NodeName Uniq? */
1145         if ((GetCount(the_netmap) > 0) &&
1146             (GetHash(the_netmap, SKEY(node), &vNetMap)))
1147         {
1148                 TheNetMap = (CtdlNetMap*)vNetMap;
1149                 if (nexthop != NULL)
1150                         *nexthop = TheNetMap->NextHop;
1151                 return(0);
1152         }
1153
1154         /*
1155          * If we get to this point, the supplied node name is bogus.
1156          */
1157         syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
1158         return(-1);
1159 }
1160
1161
1162 void destroy_network_cfgs(void)
1163 {
1164         HashList *pCfgTypeHash = CfgTypeHash;
1165         HashList *pRoomConfigs = RoomConfigs;
1166
1167         CfgTypeHash = NULL;
1168         RoomConfigs = NULL;
1169
1170         DeleteHash(&pCfgTypeHash);
1171         DeleteHash(&pRoomConfigs);
1172 }
1173
1174 /*
1175  * Module entry point
1176  */
1177 CTDL_MODULE_INIT(netconfig)
1178 {
1179         if (!threading)
1180         {
1181                 CtdlRegisterCleanupHook(destroy_network_cfgs);
1182                 LoadAllNetConfigs ();
1183                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1184                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1185                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1186         }
1187         return "netconfig";
1188 }