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