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 #include "serv_extensions.h"
  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         int i;
 150         RoomNetCfgLine *NewData;
 151
 152         NewData = (RoomNetCfgLine*)malloc(sizeof(RoomNetCfgLine));
 153         memset(NewData, 0, sizeof(RoomNetCfgLine));
 154         NewData->Value = (StrBuf **)malloc(sizeof(StrBuf*) * data->nValues);
 155         memset(NewData->Value, 0, sizeof(StrBuf*) * data->nValues);
 156
 157         for (i = 0; i < data->nValues; i++)
 158         {
 159                 NewData->Value[i] = NewStrBufDup(data->Value[i]);
 160         }
 161         NewData->nValues = data->nValues;
 162         return NewData;
 163 }
 164 int ReadRoomNetConfigFile(OneRoomNetCfg **pOneRNCfg, char *filename)
 165 {
 166         int fd;
 167         const char *ErrStr = NULL;
 168         const char *Pos;
 169         const CfgLineType *pCfg;
 170         StrBuf *Line;
 171         StrBuf *InStr;
 172         OneRoomNetCfg *OneRNCfg = NULL;
 173
 174         fd = open(filename, O_NONBLOCK|O_RDONLY);
 175         if (fd == -1) {
 176                 *pOneRNCfg = NULL;
 177                 return 0;
 178         }
 179         if (*pOneRNCfg != NULL)
 180         {
 181                 OneRNCfg = *pOneRNCfg;
 182                 FreeRoomNetworkStructContent (OneRNCfg);
 183         }
 184         else
 185                 OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 186         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 187         *pOneRNCfg = OneRNCfg;
 188         Line = NewStrBuf();
 189         InStr = NewStrBuf();
 190
 191         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 192                 if (StrLength(Line) == 0)
 193                         continue;
 194                 Pos = NULL;
 195                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 196
 197                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 198                 if (pCfg != NULL)
 199                 {
 200                         pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 201                 }
 202                 else
 203                 {
 204                         if (OneRNCfg->misc == NULL)
 205                         {
 206                                 OneRNCfg->misc = NewStrBufDup(Line);
 207                         }
 208                         else
 209                         {
 210                                 if(StrLength(OneRNCfg->misc) > 0)
 211                                         StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 212                                 StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 213                         }
 214                 }
 215         }
 216         if (fd > 0)
 217                 close(fd);
 218         FreeStrBuf(&InStr);
 219         FreeStrBuf(&Line);
 220         return 1;
 221 }
 222
 223 int SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, char *filename)
 224 {
 225         RoomNetCfg eCfg;
 226         StrBuf *Cfg = NULL;
 227         StrBuf *OutBuffer = NULL;
 228         char tempfilename[PATH_MAX];
 229         int TmpFD;
 230         long len;
 231         time_t unixtime;
 232         struct timeval tv;
 233         long reltid; /* if we don't have SYS_gettid, use "random" value */
 234         int rc;
 235         HashPos *CfgIt;
 236
 237         len = strlen(filename);
 238         memcpy(tempfilename, filename, len + 1);
 239
 240 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 241         reltid = syscall(SYS_gettid);
 242 #endif
 243         gettimeofday(&tv, NULL);
 244         /* Promote to time_t; types differ on some OSes (like darwin) */
 245         unixtime = tv.tv_sec;
 246
 247         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 248         errno = 0;
 249         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 250         Cfg = NewStrBuf();
 251         if ((TmpFD < 0) || (errno != 0)) {
 252                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 253                         filename, strerror(errno));
 254                 unlink(tempfilename);
 255                 FreeStrBuf(&Cfg);
 256                 return 0;
 257         }
 258         else {
 259                 OutBuffer = NewStrBuf();
 260                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 261                 fchown(TmpFD, config.c_ctdluid, 0);
 262                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 263                 {
 264                         const CfgLineType *pCfg;
 265                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 266                         if (pCfg->IsSingleLine)
 267                         {
 268                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 269                         }
 270                         else
 271                         {
 272                                 RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 273                                 while (pName != NULL)
 274                                 {
 275                                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 276                                         pName = pName->next;
 277                                 }
 278
 279
 280                         }
 281
 282                 }
 283                 DeleteHashPos(&CfgIt);
 284
 285
 286                 if (OneRNCfg->misc != NULL) {
 287                         StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 288                 }
 289
 290                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 291                 if ((rc >=0 ) && (rc == StrLength(OutBuffer)))
 292                 {
 293                         close(TmpFD);
 294                         rename(tempfilename, filename);
 295                         rc = 1;
 296                 }
 297                 else {
 298                         syslog(LOG_EMERG,
 299                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 300                                       tempfilename,
 301                                       strerror(errno));
 302                         close(TmpFD);
 303                         unlink(tempfilename);
 304                         rc = 0;
 305                 }
 306                 FreeStrBuf(&OutBuffer);
 307
 308         }
 309         FreeStrBuf(&Cfg);
 310         return rc;
 311 }
 312
 313 void SaveModifiedRooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 314 {
 315         char filename[PATH_MAX];
 316
 317         if (OneRNCfg->changed)
 318         {
 319                 assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 320                 SaveRoomNetConfigFile(OneRNCfg, filename);
 321                 OneRNCfg->changed = 0;
 322         }
 323 }
 324 void SaveChangedConfigs(void)
 325 {
 326         CtdlForEachNetCfgRoom(SaveModifiedRooms,
 327                               NULL,
 328                               maxRoomNetCfg);
 329 }
 330
 331
 332 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 333 {
 334         int new = 0;
 335         RoomNetCfgLine **pLine;
 336         char filename[PATH_MAX];
 337
 338         if (OneRNCfg == NULL)
 339         {
 340                 new = 1;
 341                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 342                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 343         }
 344         pLine = &OneRNCfg->NetConfigs[LineType];
 345
 346         while(*pLine != NULL) pLine = &((*pLine)->next);
 347         *pLine = Line;
 348
 349         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 350         SaveRoomNetConfigFile(OneRNCfg, filename);
 351         OneRNCfg->changed = 0;
 352         if (new)
 353         {
 354                 Put(RoomConfigs, LKEY(qrbuf->QRnumber), OneRNCfg, vFreeRoomNetworkStruct);
 355         }
 356 }
 357
 358 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 359 {
 360         RoomNetCfg eCfg;
 361         HashPos *CfgIt;
 362
 363         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 364         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 365         {
 366                 const CfgLineType *pCfg;
 367                 RoomNetCfgLine *pNext, *pName;
 368
 369                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 370                 pName= OneRNCfg->NetConfigs[eCfg];
 371                 while (pName != NULL)
 372                 {
 373                         pNext = pName->next;
 374                         if (pCfg != NULL)
 375                         {
 376                                 pCfg->DeAllocator(pCfg, &pName);
 377                         }
 378                         else
 379                         {
 380                                 DeleteGenericCfgLine(NULL, &pName);
 381                         }
 382                         pName = pNext;
 383                 }
 384         }
 385         DeleteHashPos(&CfgIt);
 386
 387         FreeStrBuf(&OneRNCfg->Sender);
 388         FreeStrBuf(&OneRNCfg->RoomInfo);
 389         FreeStrBuf(&OneRNCfg->misc);
 390         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 391 }
 392 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 393 {
 394         OneRoomNetCfg *OneRNCfg;
 395         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 396         FreeRoomNetworkStructContent(OneRNCfg);
 397         free(OneRNCfg);
 398 }
 399 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 400 {
 401         vFreeRoomNetworkStruct(*pOneRNCfg);
 402         *pOneRNCfg=NULL;
 403 }
 404
 405 OneRoomNetCfg* CtdlGetNetCfgForRoom(long QRNumber)
 406 {
 407         void *pv;
 408         GetHash(RoomConfigs, LKEY(QRNumber), &pv);
 409         return (OneRoomNetCfg*)pv;
 410 }
 411
 412
 413 void LoadAllNetConfigs(void)
 414 {
 415         DIR *filedir = NULL;
 416         struct dirent *d;
 417         struct dirent *filedir_entry;
 418         int d_type = 0;
 419         int d_namelen;
 420         long RoomNumber;
 421         OneRoomNetCfg *OneRNCfg;
 422         int IsNumOnly;
 423         const char *pch;
 424         char path[PATH_MAX];
 425
 426         RoomConfigs = NewHash(1, NULL);
 427         filedir = opendir (ctdl_netcfg_dir);
 428         if (filedir == NULL) {
 429                 return ; /// todo: panic!
 430         }
 431
 432         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 433         if (d == NULL) {
 434                 closedir(filedir);
 435                 return ;
 436         }
 437
 438         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 439                (filedir_entry != NULL))
 440         {
 441 #ifdef _DIRENT_HAVE_D_NAMLEN
 442                 d_namelen = filedir_entry->d_namelen;
 443 #else
 444                 d_namelen = strlen(filedir_entry->d_name);
 445 #endif
 446
 447 #ifdef _DIRENT_HAVE_D_TYPE
 448                 d_type = filedir_entry->d_type;
 449 #else
 450
 451 #ifndef DT_UNKNOWN
 452 #define DT_UNKNOWN     0
 453 #define DT_DIR         4
 454 #define DT_REG         8
 455 #define DT_LNK         10
 456
 457 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 458 #define DTTOIF(dirtype)        ((dirtype) << 12)
 459 #endif
 460                 d_type = DT_UNKNOWN;
 461 #endif
 462                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 463                         continue; /* Ignore backup files... */
 464
 465                 if ((d_namelen == 1) &&
 466                     (filedir_entry->d_name[0] == '.'))
 467                         continue;
 468
 469                 if ((d_namelen == 2) &&
 470                     (filedir_entry->d_name[0] == '.') &&
 471                     (filedir_entry->d_name[1] == '.'))
 472                         continue;
 473
 474                 snprintf(path, PATH_MAX, "%s/%s",
 475                          ctdl_netcfg_dir, filedir_entry->d_name);
 476
 477                 if (d_type == DT_UNKNOWN) {
 478                         struct stat s;
 479                         if (lstat(path, &s) == 0) {
 480                                 d_type = IFTODT(s.st_mode);
 481                         }
 482                 }
 483
 484                 switch (d_type)
 485                 {
 486                 case DT_DIR:
 487                         break;
 488                 case DT_LNK: /* TODO: check whether its a file or a directory */
 489                 case DT_REG:
 490                         IsNumOnly = 1;
 491                         pch = filedir_entry->d_name;
 492                         while (*pch != '\0')
 493                         {
 494                                 if (!isdigit(*pch))
 495                                 {
 496                                         IsNumOnly = 0;
 497                                 }
 498                                 pch ++;
 499                         }
 500                         if (IsNumOnly)
 501                         {
 502                                 OneRNCfg = NULL;
 503                                 RoomNumber = atol(filedir_entry->d_name);
 504                                 ReadRoomNetConfigFile(&OneRNCfg, path);
 505
 506                                 if (OneRNCfg != NULL)
 507                                         Put(RoomConfigs, LKEY(RoomNumber), OneRNCfg, vFreeRoomNetworkStruct);
 508                                 /* syslog(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 509                         }
 510                         break;
 511                 default:
 512                         break;
 513                 }
 514
 515
 516         }
 517         free(d);
 518         closedir(filedir);
 519 }
 520
 521
 522 /*-----------------------------------------------------------------------------*
 523  *              Per room network configs : exchange with client                *
 524  *-----------------------------------------------------------------------------*/
 525 void cmd_gnet(char *argbuf)
 526 {
 527         char filename[PATH_MAX];
 528         char buf[SIZ];
 529         FILE *fp;
 530
 531
 532         if (!IsEmptyStr(argbuf))
 533         {
 534                 if (CtdlAccessCheck(ac_aide)) return;
 535                 if (strcmp(argbuf, FILE_MAILALIAS))
 536                 {
 537                         cprintf("%d No such file or directory\n",
 538                                 ERROR + INTERNAL_ERROR);
 539                         return;
 540                 }
 541                 safestrncpy(filename, file_mail_aliases, sizeof(filename));
 542                 cprintf("%d Settings for <%s>\n",
 543                         LISTING_FOLLOWS,
 544                         filename);
 545         }
 546         else
 547         {
 548                 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 549                         /* users can edit the netconfigs for their own mailbox rooms */
 550                 }
 551                 else if (CtdlAccessCheck(ac_room_aide)) return;
 552
 553                 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 554                 cprintf("%d Network settings for room #%ld <%s>\n",
 555                         LISTING_FOLLOWS,
 556                         CC->room.QRnumber, CC->room.QRname);
 557         }
 558
 559         fp = fopen(filename, "r");
 560         if (fp != NULL) {
 561                 while (fgets(buf, sizeof buf, fp) != NULL) {
 562                         buf[strlen(buf)-1] = 0;
 563                         cprintf("%s\n", buf);
 564                 }
 565                 fclose(fp);
 566         }
 567
 568         cprintf("000\n");
 569 }
 570
 571 #define nForceAliases 5
 572 const ConstStr ForceAliases[nForceAliases] = {
 573         {HKEY("bbs,")},
 574         {HKEY("root,")},
 575         {HKEY("Auto,")},
 576         {HKEY("postmaster,")},
 577         {HKEY("abuse,")}
 578 };
 579 void cmd_snet(char *argbuf)
 580 {
 581         struct CitContext *CCC = CC;
 582         char tempfilename[PATH_MAX];
 583         char filename[PATH_MAX];
 584         int TmpFD;
 585         StrBuf *Line;
 586         struct stat StatBuf;
 587         long len;
 588         int rc;
 589         int IsMailAlias = 0;
 590         int MailAliasesFound[nForceAliases];
 591
 592         unbuffer_output();
 593
 594         if (!IsEmptyStr(argbuf))
 595         {
 596                 if (CtdlAccessCheck(ac_aide)) return;
 597                 if (strcmp(argbuf, FILE_MAILALIAS))
 598                 {
 599                         cprintf("%d No such file or directory\n",
 600                                 ERROR + INTERNAL_ERROR);
 601                         return;
 602                 }
 603                 len = safestrncpy(filename, file_mail_aliases, sizeof(filename));
 604                 memset(MailAliasesFound, 0, sizeof(MailAliasesFound));
 605                 memcpy(tempfilename, filename, len + 1);
 606                 IsMailAlias = 1;
 607         }
 608         else
 609         {
 610                 if ( (CCC->room.QRflags & QR_MAILBOX) && (CCC->user.usernum == atol(CCC->room.QRname)) ) {
 611                         /* users can edit the netconfigs for their own mailbox rooms */
 612                 }
 613                 else if (CtdlAccessCheck(ac_room_aide)) return;
 614
 615                 len = assoc_file_name(filename, sizeof filename, &CCC->room, ctdl_netcfg_dir);
 616                 memcpy(tempfilename, filename, len + 1);
 617         }
 618         memset(&StatBuf, 0, sizeof(struct stat));
 619         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 620                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 621
 622         sprintf(tempfilename + len, ".%d", CCC->cs_pid);
 623         errno = 0;
 624         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 625
 626         if ((TmpFD > 0) && (errno == 0))
 627         {
 628                 char *tmp = malloc(StatBuf.st_size * 2);
 629                 memset(tmp, ' ', StatBuf.st_size * 2);
 630                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 631                 free(tmp);
 632                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 633                 {
 634                         close(TmpFD);
 635                         cprintf("%d Unable to allocate the space required for %s: %s\n",
 636                                 ERROR + INTERNAL_ERROR,
 637                                 tempfilename,
 638                                 strerror(errno));
 639                         unlink(tempfilename);
 640                         return;
 641                 }
 642                 lseek(TmpFD, SEEK_SET, 0);
 643         }
 644         else {
 645                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 646                         ERROR + INTERNAL_ERROR,
 647                         tempfilename,
 648                         strerror(errno));
 649                 unlink(tempfilename);
 650                 return;
 651         }
 652         Line = NewStrBuf();
 653
 654         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 655
 656         len = 0;
 657         while (rc = CtdlClientGetLine(Line),
 658                (rc >= 0))
 659         {
 660                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 661                         break;
 662                 if (IsMailAlias)
 663                 {
 664                         int i;
 665
 666                         for (i = 0; i < nForceAliases; i++)
 667                         {
 668                                 if ((!MailAliasesFound[i]) &&
 669                                     (strncmp(ForceAliases[i].Key,
 670                                              ChrPtr(Line),
 671                                              ForceAliases[i].len) == 0)
 672                                         )
 673                                     {
 674                                             MailAliasesFound[i] = 1;
 675                                             break;
 676                                     }
 677                         }
 678                 }
 679
 680                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 681                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 682                 len += StrLength(Line);
 683         }
 684         FreeStrBuf(&Line);
 685         ftruncate(TmpFD, len);
 686         close(TmpFD);
 687
 688         if (IsMailAlias)
 689         {
 690                 int i, state;
 691                 /*
 692                  * Sanity check whether all aliases required by the RFCs were set
 693                  * else bail out.
 694                  */
 695                 state = 1;
 696                 for (i = 0; i < nForceAliases; i++)
 697                 {
 698                         if (!MailAliasesFound[i])
 699                                 state = 0;
 700                 }
 701                 if (state == 0)
 702                 {
 703                         cprintf("%d won't do this - you're missing an RFC required alias.\n",
 704                                 ERROR + INTERNAL_ERROR);
 705                         unlink(tempfilename);
 706                         return;
 707                 }
 708         }
 709
 710         /* Now copy the temp file to its permanent location.
 711          * (We copy instead of link because they may be on different filesystems)
 712          */
 713         begin_critical_section(S_NETCONFIGS);
 714         rename(tempfilename, filename);
 715         if (!IsMailAlias)
 716         {
 717                 OneRoomNetCfg *RNCfg;
 718                 RNCfg = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 719                 if (RNCfg != NULL)
 720                 {
 721                         ReadRoomNetConfigFile(&RNCfg, filename);
 722                 }
 723                 else
 724                 {
 725                         ReadRoomNetConfigFile(&RNCfg, filename);
 726                         Put(RoomConfigs, LKEY(CCC->room.QRnumber), RNCfg, vFreeRoomNetworkStruct);
 727                 }
 728
 729                 PerformRoomHooks(&CCC->room);
 730         }
 731         end_critical_section(S_NETCONFIGS);
 732 }
 733
 734
 735 /*-----------------------------------------------------------------------------*
 736  *                       Per node network configs                              *
 737  *-----------------------------------------------------------------------------*/
 738 void DeleteCtdlNodeConf(void *vNode)
 739 {
 740         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 741         FreeStrBuf(&Node->NodeName);
 742         FreeStrBuf(&Node->Secret);
 743         FreeStrBuf(&Node->Host);
 744         FreeStrBuf(&Node->Port);
 745         free(Node);
 746 }
 747
 748 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 749 {
 750         const char *Pos = NULL;
 751         CtdlNodeConf *Node;
 752
 753         /* we need at least 4 pipes and some other text so its invalid. */
 754         if (StrLength(SerializedNode) < 8)
 755                 return NULL;
 756         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 757
 758         Node->DeleteMe = 0;
 759
 760         Node->NodeName=NewStrBuf();
 761         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 762
 763         Node->Secret=NewStrBuf();
 764         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 765
 766         Node->Host=NewStrBuf();
 767         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 768
 769         Node->Port=NewStrBuf();
 770         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 771         return Node;
 772 }
 773
 774
 775 /*
 776  * Load or refresh the Citadel network (IGnet) configuration for this node.
 777  */
 778 HashList* CtdlLoadIgNetCfg(void)
 779 {
 780         const char *LinePos;
 781         char       *Cfg;
 782         StrBuf     *Buf;
 783         StrBuf     *LineBuf;
 784         HashList   *Hash;
 785         CtdlNodeConf   *Node;
 786
 787         Cfg =  CtdlGetSysConfig(IGNETCFG);
 788         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 789                 if (Cfg != NULL)
 790                         free(Cfg);
 791                 return NULL;
 792         }
 793
 794         Hash = NewHash(1, NULL);
 795         Buf = NewStrBufPlain(Cfg, -1);
 796         free(Cfg);
 797         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 798         LinePos = NULL;
 799         do
 800         {
 801                 StrBufSipLine(LineBuf, Buf, &LinePos);
 802                 if (StrLength(LineBuf) != 0) {
 803                         Node = NewNode(LineBuf);
 804                         if (Node != NULL) {
 805                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 806                         }
 807                 }
 808         } while (LinePos != StrBufNOTNULL);
 809         FreeStrBuf(&Buf);
 810         FreeStrBuf(&LineBuf);
 811         return Hash;
 812 }
 813
 814
 815 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 816 {
 817         const RoomNetCfg RecipientCfgs[] = {
 818                 listrecp,
 819                 digestrecp,
 820                 participate,
 821                 maxRoomNetCfg
 822         };
 823         int i;
 824         RoomNetCfgLine *nptr;
 825         size_t len;
 826
 827         len = strlen(Name);
 828         i = 0;
 829         while (RecipientCfgs[i] != maxRoomNetCfg)
 830         {
 831                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 832
 833                 while (nptr != NULL)
 834                 {
 835                         if ((StrLength(nptr->Value[0]) == len) &&
 836                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 837                         {
 838                                 return 1;
 839                         }
 840                         nptr = nptr->next;
 841                 }
 842                 i++;
 843         }
 844         return 0;
 845 }
 846
 847
 848
 849 int CtdlNetconfigCheckRoomaccess(
 850         char *errmsgbuf,
 851         size_t n,
 852         const char* RemoteIdentifier)
 853 {
 854         OneRoomNetCfg *RNCfg;
 855         int found;
 856
 857         if (RemoteIdentifier == NULL)
 858         {
 859                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 860                 return (ERROR + USERNAME_REQUIRED);
 861         }
 862
 863         begin_critical_section(S_NETCONFIGS);
 864         RNCfg = CtdlGetNetCfgForRoom (CC->room.QRnumber);
 865         if (RNCfg == NULL)
 866         {
 867                 end_critical_section(S_NETCONFIGS);
 868                 snprintf(errmsgbuf, n,
 869                          "This mailing list only accepts posts from subscribers.");
 870                 return (ERROR + NO_SUCH_USER);
 871         }
 872         found = is_recipient (RNCfg, RemoteIdentifier);
 873         end_critical_section(S_NETCONFIGS);
 874
 875         if (found) {
 876                 return (0);
 877         }
 878         else {
 879                 snprintf(errmsgbuf, n,
 880                          "This mailing list only accepts posts from subscribers.");
 881                 return (ERROR + NO_SUCH_USER);
 882         }
 883 }
 884
 885
 886
 887 /*
 888  * cmd_netp() - authenticate to the server as another Citadel node polling
 889  *            for network traffic
 890  */
 891 void cmd_netp(char *cmdbuf)
 892 {
 893         struct CitContext *CCC = CC;
 894         HashList *working_ignetcfg;
 895         char *node;
 896         StrBuf *NodeStr;
 897         long nodelen;
 898         int v;
 899         long lens[2];
 900         const char *strs[2];
 901
 902         const StrBuf *secret = NULL;
 903         const StrBuf *nexthop = NULL;
 904         char err_buf[SIZ] = "";
 905
 906         /* Authenticate */
 907         node = CCC->curr_user;
 908         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 909         NodeStr = NewStrBufPlain(node, nodelen);
 910         /* load the IGnet Configuration to check node validity */
 911         working_ignetcfg = CtdlLoadIgNetCfg();
 912         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 913         if (v != 0) {
 914                 snprintf(err_buf, sizeof err_buf,
 915                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 916                         node, CCC->cs_host, CCC->cs_addr
 917                 );
 918                 syslog(LOG_WARNING, "%s", err_buf);
 919                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 920
 921                 strs[0] = CCC->cs_addr;
 922                 lens[0] = strlen(CCC->cs_addr);
 923
 924                 strs[1] = "SRV_UNKNOWN";
 925                 lens[1] = sizeof("SRV_UNKNOWN" - 1);
 926
 927                 CtdlAideFPMessage(
 928                         err_buf,
 929                         "IGNet Networking.",
 930                         2, strs, (long*) &lens,
 931                         CCC->cs_pid, 0,
 932                         time(NULL));
 933
 934                 DeleteHash(&working_ignetcfg);
 935                 FreeStrBuf(&NodeStr);
 936                 return;
 937         }
 938
 939         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 940         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 941                 snprintf(err_buf, sizeof err_buf,
 942                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 943                         CCC->cs_host, CCC->cs_addr, node
 944                 );
 945                 syslog(LOG_WARNING, "%s", err_buf);
 946                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 947
 948                 strs[0] = CCC->cs_addr;
 949                 lens[0] = strlen(CCC->cs_addr);
 950
 951                 strs[1] = "SRV_PW";
 952                 lens[1] = sizeof("SRV_PW" - 1);
 953
 954                 CtdlAideFPMessage(
 955                         err_buf,
 956                         "IGNet Networking.",
 957                         2, strs,
 958                         (long*) &lens,
 959                         CCC->cs_pid, 0,
 960                         time(NULL));
 961
 962                 DeleteHash(&working_ignetcfg);
 963                 FreeStrBuf(&NodeStr);
 964                 return;
 965         }
 966
 967         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 968                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 969                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 970                 DeleteHash(&working_ignetcfg);
 971                 FreeStrBuf(&NodeStr);
 972                 return;
 973         }
 974         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 975         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 976         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
 977                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 978         );
 979         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 980         DeleteHash(&working_ignetcfg);
 981         FreeStrBuf(&NodeStr);
 982 }
 983
 984
 985 /*-----------------------------------------------------------------------------*
 986  *                 Network maps: evaluate other nodes                          *
 987  *-----------------------------------------------------------------------------*/
 988
 989 void DeleteNetMap(void *vNetMap)
 990 {
 991         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 992         FreeStrBuf(&TheNetMap->NodeName);
 993         FreeStrBuf(&TheNetMap->NextHop);
 994         free(TheNetMap);
 995 }
 996
 997 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
 998 {
 999         const char *Pos = NULL;
1000         CtdlNetMap *NM;
1001
1002         /* we need at least 3 pipes and some other text so its invalid. */
1003         if (StrLength(SerializedNetMap) < 6)
1004                 return NULL;
1005         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
1006
1007         NM->NodeName=NewStrBuf();
1008         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
1009
1010         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
1011
1012         NM->NextHop=NewStrBuf();
1013         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
1014
1015         return NM;
1016 }
1017
1018 HashList* CtdlReadNetworkMap(void)
1019 {
1020         const char *LinePos;
1021         char       *Cfg;
1022         StrBuf     *Buf;
1023         StrBuf     *LineBuf;
1024         HashList   *Hash;
1025         CtdlNetMap     *TheNetMap;
1026
1027         Hash = NewHash(1, NULL);
1028         Cfg =  CtdlGetSysConfig(IGNETMAP);
1029         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
1030                 if (Cfg != NULL)
1031                         free(Cfg);
1032                 return Hash;
1033         }
1034
1035         Buf = NewStrBufPlain(Cfg, -1);
1036         free(Cfg);
1037         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
1038         LinePos = NULL;
1039         while (StrBufSipLine(Buf, LineBuf, &LinePos))
1040         {
1041                 TheNetMap = NewNetMap(LineBuf);
1042                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
1043                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
1044                 }
1045         }
1046         FreeStrBuf(&Buf);
1047         FreeStrBuf(&LineBuf);
1048         return Hash;
1049 }
1050
1051 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
1052 {
1053         void *vMap;
1054         const char *key;
1055         long len;
1056         StrBuf *Ret = NewStrBuf();
1057         HashPos *Pos = GetNewHashPos(Map, 0);
1058
1059         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
1060         {
1061                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
1062                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
1063                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1064
1065                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
1066                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1067
1068                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
1069                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
1070         }
1071         DeleteHashPos(&Pos);
1072         return Ret;
1073 }
1074
1075
1076 /*
1077  * Learn topology from path fields
1078  */
1079 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
1080 {
1081         CtdlNetMap *pNM = NULL;
1082         void *vptr;
1083         char nexthop[256];
1084         CtdlNetMap *nmptr;
1085
1086         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
1087             (vptr != NULL))/* TODO: is the NodeName Uniq? */
1088         {
1089                 pNM = (CtdlNetMap*)vptr;
1090                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
1091                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
1092                         pNM->lastcontact = time(NULL);
1093                         (*netmap_changed) ++;
1094                         return;
1095                 }
1096         }
1097
1098         /* If we got here then it's not in the map, so add it. */
1099         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
1100         nmptr->NodeName = NewStrBufPlain(node, -1);
1101         nmptr->lastcontact = time(NULL);
1102         nmptr->NextHop = NewStrBuf ();
1103         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
1104         /* TODO: is the NodeName Uniq? */
1105         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
1106         (*netmap_changed) ++;
1107 }
1108
1109
1110 /*
1111  * Check the network map and determine whether the supplied node name is
1112  * valid.  If it is not a neighbor node, supply the name of a neighbor node
1113  * which is the next hop.  If it *is* a neighbor node, we also fill in the
1114  * shared secret.
1115  */
1116 int CtdlIsValidNode(const StrBuf **nexthop,
1117                     const StrBuf **secret,
1118                     StrBuf *node,
1119                     HashList *IgnetCfg,
1120                     HashList *the_netmap)
1121 {
1122         void *vNetMap;
1123         void *vNodeConf;
1124         CtdlNodeConf *TheNode;
1125         CtdlNetMap *TheNetMap;
1126
1127         if (StrLength(node) == 0) {
1128                 return(-1);
1129         }
1130
1131         /*
1132          * First try the neighbor nodes
1133          */
1134         if (GetCount(IgnetCfg) == 0) {
1135                 syslog(LOG_INFO, "IgnetCfg is empty!\n");
1136                 if (nexthop != NULL) {
1137                         *nexthop = NULL;
1138                 }
1139                 return(-1);
1140         }
1141
1142         /* try to find a neigbour with the name 'node' */
1143         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
1144             (vNodeConf != NULL))
1145         {
1146                 TheNode = (CtdlNodeConf*)vNodeConf;
1147                 if (secret != NULL)
1148                         *secret = TheNode->Secret;
1149                 return 0;               /* yup, it's a direct neighbor */
1150         }
1151
1152         /*
1153          * If we get to this point we have to see if we know the next hop
1154          *//* TODO: is the NodeName Uniq? */
1155         if ((GetCount(the_netmap) > 0) &&
1156             (GetHash(the_netmap, SKEY(node), &vNetMap)))
1157         {
1158                 TheNetMap = (CtdlNetMap*)vNetMap;
1159                 if (nexthop != NULL)
1160                         *nexthop = TheNetMap->NextHop;
1161                 return(0);
1162         }
1163
1164         /*
1165          * If we get to this point, the supplied node name is bogus.
1166          */
1167         syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
1168         return(-1);
1169 }
1170
1171
1172 void destroy_network_cfgs(void)
1173 {
1174         HashList *pCfgTypeHash = CfgTypeHash;
1175         HashList *pRoomConfigs = RoomConfigs;
1176
1177         RoomConfigs = NULL;
1178         DeleteHash(&pRoomConfigs);
1179
1180         CfgTypeHash = NULL;
1181         DeleteHash(&pCfgTypeHash);
1182 }
1183
1184 /*
1185  * Module entry point
1186  */
1187 CTDL_MODULE_INIT(netconfig)
1188 {
1189         if (!threading)
1190         {
1191                 CtdlRegisterCleanupHook(destroy_network_cfgs);
1192                 LoadAllNetConfigs ();
1193                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1194                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1195                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1196         }
1197         return "netconfig";
1198 }