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         fchown(fd, CTDLUID, (-1));
 180         fchmod(fd, 0600);
 181
 182         if (*pOneRNCfg != NULL)
 183         {
 184                 OneRNCfg = *pOneRNCfg;
 185                 FreeRoomNetworkStructContent (OneRNCfg);
 186         }
 187         else
 188                 OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 189         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 190         *pOneRNCfg = OneRNCfg;
 191         Line = NewStrBuf();
 192         InStr = NewStrBuf();
 193
 194         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 195                 if (StrLength(Line) == 0)
 196                         continue;
 197                 Pos = NULL;
 198                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 199
 200                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 201                 if (pCfg != NULL)
 202                 {
 203                         pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 204                 }
 205                 else
 206                 {
 207                         if (OneRNCfg->misc == NULL)
 208                         {
 209                                 OneRNCfg->misc = NewStrBufDup(Line);
 210                         }
 211                         else
 212                         {
 213                                 if(StrLength(OneRNCfg->misc) > 0)
 214                                         StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 215                                 StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 216                         }
 217                 }
 218         }
 219         if (fd > 0)
 220                 close(fd);
 221         FreeStrBuf(&InStr);
 222         FreeStrBuf(&Line);
 223         return 1;
 224 }
 225
 226 int SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, char *filename)
 227 {
 228         RoomNetCfg eCfg;
 229         StrBuf *Cfg = NULL;
 230         StrBuf *OutBuffer = NULL;
 231         char tempfilename[PATH_MAX];
 232         int TmpFD;
 233         long len;
 234         time_t unixtime;
 235         struct timeval tv;
 236         long reltid; /* if we don't have SYS_gettid, use "random" value */
 237         int rc;
 238         HashPos *CfgIt;
 239
 240         len = strlen(filename);
 241         memcpy(tempfilename, filename, len + 1);
 242
 243 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 244         reltid = syscall(SYS_gettid);
 245 #endif
 246         gettimeofday(&tv, NULL);
 247         /* Promote to time_t; types differ on some OSes (like darwin) */
 248         unixtime = tv.tv_sec;
 249
 250         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 251         errno = 0;
 252         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 253         Cfg = NewStrBuf();
 254         if ((TmpFD < 0) || (errno != 0)) {
 255                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 256                         filename, strerror(errno));
 257                 unlink(tempfilename);
 258                 FreeStrBuf(&Cfg);
 259                 return 0;
 260         }
 261         else {
 262                 OutBuffer = NewStrBuf();
 263                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 264                 fchown(TmpFD, config.c_ctdluid, 0);
 265                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 266                 {
 267                         const CfgLineType *pCfg;
 268                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 269                         if (pCfg->IsSingleLine)
 270                         {
 271                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 272                         }
 273                         else
 274                         {
 275                                 RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 276                                 while (pName != NULL)
 277                                 {
 278                                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 279                                         pName = pName->next;
 280                                 }
 281
 282
 283                         }
 284
 285                 }
 286                 DeleteHashPos(&CfgIt);
 287
 288
 289                 if (OneRNCfg->misc != NULL) {
 290                         StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 291                 }
 292
 293                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 294                 if ((rc >=0 ) && (rc == StrLength(OutBuffer)))
 295                 {
 296                         close(TmpFD);
 297                         rename(tempfilename, filename);
 298                         rc = 1;
 299                 }
 300                 else {
 301                         syslog(LOG_EMERG,
 302                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 303                                       tempfilename,
 304                                       strerror(errno));
 305                         close(TmpFD);
 306                         unlink(tempfilename);
 307                         rc = 0;
 308                 }
 309                 FreeStrBuf(&OutBuffer);
 310
 311         }
 312         FreeStrBuf(&Cfg);
 313         return rc;
 314 }
 315
 316 void SaveModifiedRooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 317 {
 318         char filename[PATH_MAX];
 319
 320         if (OneRNCfg->changed)
 321         {
 322                 assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 323                 SaveRoomNetConfigFile(OneRNCfg, filename);
 324                 OneRNCfg->changed = 0;
 325         }
 326 }
 327 void SaveChangedConfigs(void)
 328 {
 329         CtdlForEachNetCfgRoom(SaveModifiedRooms,
 330                               NULL,
 331                               maxRoomNetCfg);
 332 }
 333
 334
 335 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 336 {
 337         int new = 0;
 338         RoomNetCfgLine **pLine;
 339         char filename[PATH_MAX];
 340
 341         if (OneRNCfg == NULL)
 342         {
 343                 new = 1;
 344                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 345                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 346         }
 347         pLine = &OneRNCfg->NetConfigs[LineType];
 348
 349         while(*pLine != NULL) pLine = &((*pLine)->next);
 350         *pLine = Line;
 351
 352         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 353         SaveRoomNetConfigFile(OneRNCfg, filename);
 354         OneRNCfg->changed = 0;
 355         if (new)
 356         {
 357                 Put(RoomConfigs, LKEY(qrbuf->QRnumber), OneRNCfg, vFreeRoomNetworkStruct);
 358         }
 359 }
 360
 361 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 362 {
 363         RoomNetCfg eCfg;
 364         HashPos *CfgIt;
 365
 366         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 367         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 368         {
 369                 const CfgLineType *pCfg;
 370                 RoomNetCfgLine *pNext, *pName;
 371
 372                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 373                 pName= OneRNCfg->NetConfigs[eCfg];
 374                 while (pName != NULL)
 375                 {
 376                         pNext = pName->next;
 377                         if (pCfg != NULL)
 378                         {
 379                                 pCfg->DeAllocator(pCfg, &pName);
 380                         }
 381                         else
 382                         {
 383                                 DeleteGenericCfgLine(NULL, &pName);
 384                         }
 385                         pName = pNext;
 386                 }
 387         }
 388         DeleteHashPos(&CfgIt);
 389
 390         FreeStrBuf(&OneRNCfg->Sender);
 391         FreeStrBuf(&OneRNCfg->RoomInfo);
 392         FreeStrBuf(&OneRNCfg->misc);
 393         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 394 }
 395 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 396 {
 397         OneRoomNetCfg *OneRNCfg;
 398         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 399         FreeRoomNetworkStructContent(OneRNCfg);
 400         free(OneRNCfg);
 401 }
 402 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 403 {
 404         vFreeRoomNetworkStruct(*pOneRNCfg);
 405         *pOneRNCfg=NULL;
 406 }
 407
 408 OneRoomNetCfg* CtdlGetNetCfgForRoom(long QRNumber)
 409 {
 410         void *pv;
 411         GetHash(RoomConfigs, LKEY(QRNumber), &pv);
 412         return (OneRoomNetCfg*)pv;
 413 }
 414
 415
 416 void LoadAllNetConfigs(void)
 417 {
 418         DIR *filedir = NULL;
 419         struct dirent *d;
 420         struct dirent *filedir_entry;
 421         int d_type = 0;
 422         int d_namelen;
 423         long RoomNumber;
 424         OneRoomNetCfg *OneRNCfg;
 425         int IsNumOnly;
 426         const char *pch;
 427         char path[PATH_MAX];
 428
 429         RoomConfigs = NewHash(1, NULL);
 430         filedir = opendir (ctdl_netcfg_dir);
 431         if (filedir == NULL) {
 432                 return ; /// todo: panic!
 433         }
 434
 435         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 436         if (d == NULL) {
 437                 closedir(filedir);
 438                 return ;
 439         }
 440
 441         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 442                (filedir_entry != NULL))
 443         {
 444 #ifdef _DIRENT_HAVE_D_NAMLEN
 445                 d_namelen = filedir_entry->d_namelen;
 446 #else
 447                 d_namelen = strlen(filedir_entry->d_name);
 448 #endif
 449
 450 #ifdef _DIRENT_HAVE_D_TYPE
 451                 d_type = filedir_entry->d_type;
 452 #else
 453
 454 #ifndef DT_UNKNOWN
 455 #define DT_UNKNOWN     0
 456 #define DT_DIR         4
 457 #define DT_REG         8
 458 #define DT_LNK         10
 459
 460 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 461 #define DTTOIF(dirtype)        ((dirtype) << 12)
 462 #endif
 463                 d_type = DT_UNKNOWN;
 464 #endif
 465                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 466                         continue; /* Ignore backup files... */
 467
 468                 if ((d_namelen == 1) &&
 469                     (filedir_entry->d_name[0] == '.'))
 470                         continue;
 471
 472                 if ((d_namelen == 2) &&
 473                     (filedir_entry->d_name[0] == '.') &&
 474                     (filedir_entry->d_name[1] == '.'))
 475                         continue;
 476
 477                 snprintf(path, PATH_MAX, "%s/%s",
 478                          ctdl_netcfg_dir, filedir_entry->d_name);
 479
 480                 if (d_type == DT_UNKNOWN) {
 481                         struct stat s;
 482                         if (lstat(path, &s) == 0) {
 483                                 d_type = IFTODT(s.st_mode);
 484                         }
 485                 }
 486
 487                 switch (d_type)
 488                 {
 489                 case DT_DIR:
 490                         break;
 491                 case DT_LNK: /* TODO: check whether its a file or a directory */
 492                 case DT_REG:
 493                         IsNumOnly = 1;
 494                         pch = filedir_entry->d_name;
 495                         while (*pch != '\0')
 496                         {
 497                                 if (!isdigit(*pch))
 498                                 {
 499                                         IsNumOnly = 0;
 500                                 }
 501                                 pch ++;
 502                         }
 503                         if (IsNumOnly)
 504                         {
 505                                 OneRNCfg = NULL;
 506                                 RoomNumber = atol(filedir_entry->d_name);
 507                                 ReadRoomNetConfigFile(&OneRNCfg, path);
 508
 509                                 if (OneRNCfg != NULL)
 510                                         Put(RoomConfigs, LKEY(RoomNumber), OneRNCfg, vFreeRoomNetworkStruct);
 511                                 /* syslog(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 512                         }
 513                         break;
 514                 default:
 515                         break;
 516                 }
 517
 518
 519         }
 520         free(d);
 521         closedir(filedir);
 522 }
 523
 524
 525 /*-----------------------------------------------------------------------------*
 526  *              Per room network configs : exchange with client                *
 527  *-----------------------------------------------------------------------------*/
 528 void cmd_gnet(char *argbuf)
 529 {
 530         char filename[PATH_MAX];
 531         char buf[SIZ];
 532         FILE *fp;
 533
 534
 535         if (!IsEmptyStr(argbuf))
 536         {
 537                 if (CtdlAccessCheck(ac_aide)) return;
 538                 if (strcmp(argbuf, FILE_MAILALIAS))
 539                 {
 540                         cprintf("%d No such file or directory\n",
 541                                 ERROR + INTERNAL_ERROR);
 542                         return;
 543                 }
 544                 safestrncpy(filename, file_mail_aliases, sizeof(filename));
 545                 cprintf("%d Settings for <%s>\n",
 546                         LISTING_FOLLOWS,
 547                         filename);
 548         }
 549         else
 550         {
 551                 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 552                         /* users can edit the netconfigs for their own mailbox rooms */
 553                 }
 554                 else if (CtdlAccessCheck(ac_room_aide)) return;
 555
 556                 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 557                 cprintf("%d Network settings for room #%ld <%s>\n",
 558                         LISTING_FOLLOWS,
 559                         CC->room.QRnumber, CC->room.QRname);
 560         }
 561
 562         fp = fopen(filename, "r");
 563         if (fp != NULL) {
 564                 while (fgets(buf, sizeof buf, fp) != NULL) {
 565                         buf[strlen(buf)-1] = 0;
 566                         cprintf("%s\n", buf);
 567                 }
 568                 fclose(fp);
 569         }
 570
 571         cprintf("000\n");
 572 }
 573
 574 #define nForceAliases 5
 575 const ConstStr ForceAliases[nForceAliases] = {
 576         {HKEY("bbs,")},
 577         {HKEY("root,")},
 578         {HKEY("Auto,")},
 579         {HKEY("postmaster,")},
 580         {HKEY("abuse,")}
 581 };
 582 void cmd_snet(char *argbuf)
 583 {
 584         struct CitContext *CCC = CC;
 585         char tempfilename[PATH_MAX];
 586         char filename[PATH_MAX];
 587         int TmpFD;
 588         StrBuf *Line;
 589         struct stat StatBuf;
 590         long len;
 591         int rc;
 592         int IsMailAlias = 0;
 593         int MailAliasesFound[nForceAliases];
 594
 595         unbuffer_output();
 596
 597         if (!IsEmptyStr(argbuf))
 598         {
 599                 if (CtdlAccessCheck(ac_aide)) return;
 600                 if (strcmp(argbuf, FILE_MAILALIAS))
 601                 {
 602                         cprintf("%d No such file or directory\n",
 603                                 ERROR + INTERNAL_ERROR);
 604                         return;
 605                 }
 606                 len = safestrncpy(filename, file_mail_aliases, sizeof(filename));
 607                 memset(MailAliasesFound, 0, sizeof(MailAliasesFound));
 608                 memcpy(tempfilename, filename, len + 1);
 609                 IsMailAlias = 1;
 610         }
 611         else
 612         {
 613                 if ( (CCC->room.QRflags & QR_MAILBOX) && (CCC->user.usernum == atol(CCC->room.QRname)) ) {
 614                         /* users can edit the netconfigs for their own mailbox rooms */
 615                 }
 616                 else if (CtdlAccessCheck(ac_room_aide)) return;
 617
 618                 len = assoc_file_name(filename, sizeof filename, &CCC->room, ctdl_netcfg_dir);
 619                 memcpy(tempfilename, filename, len + 1);
 620         }
 621         memset(&StatBuf, 0, sizeof(struct stat));
 622         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 623                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 624
 625         sprintf(tempfilename + len, ".%d", CCC->cs_pid);
 626         errno = 0;
 627         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 628
 629         if ((TmpFD > 0) && (errno == 0))
 630         {
 631                 char *tmp = malloc(StatBuf.st_size * 2);
 632                 memset(tmp, ' ', StatBuf.st_size * 2);
 633                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 634                 free(tmp);
 635                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 636                 {
 637                         close(TmpFD);
 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                 lseek(TmpFD, SEEK_SET, 0);
 646         }
 647         else {
 648                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 649                         ERROR + INTERNAL_ERROR,
 650                         tempfilename,
 651                         strerror(errno));
 652                 unlink(tempfilename);
 653                 return;
 654         }
 655         Line = NewStrBuf();
 656
 657         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 658
 659         len = 0;
 660         while (rc = CtdlClientGetLine(Line),
 661                (rc >= 0))
 662         {
 663                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 664                         break;
 665                 if (IsMailAlias)
 666                 {
 667                         int i;
 668
 669                         for (i = 0; i < nForceAliases; i++)
 670                         {
 671                                 if ((!MailAliasesFound[i]) &&
 672                                     (strncmp(ForceAliases[i].Key,
 673                                              ChrPtr(Line),
 674                                              ForceAliases[i].len) == 0)
 675                                         )
 676                                     {
 677                                             MailAliasesFound[i] = 1;
 678                                             break;
 679                                     }
 680                         }
 681                 }
 682
 683                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 684                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 685                 len += StrLength(Line);
 686         }
 687         FreeStrBuf(&Line);
 688         ftruncate(TmpFD, len);
 689         close(TmpFD);
 690
 691         if (IsMailAlias)
 692         {
 693                 int i, state;
 694                 /*
 695                  * Sanity check whether all aliases required by the RFCs were set
 696                  * else bail out.
 697                  */
 698                 state = 1;
 699                 for (i = 0; i < nForceAliases; i++)
 700                 {
 701                         if (!MailAliasesFound[i])
 702                                 state = 0;
 703                 }
 704                 if (state == 0)
 705                 {
 706                         cprintf("%d won't do this - you're missing an RFC required alias.\n",
 707                                 ERROR + INTERNAL_ERROR);
 708                         unlink(tempfilename);
 709                         return;
 710                 }
 711         }
 712
 713         /* Now copy the temp file to its permanent location.
 714          * (We copy instead of link because they may be on different filesystems)
 715          */
 716         begin_critical_section(S_NETCONFIGS);
 717         rename(tempfilename, filename);
 718         if (!IsMailAlias)
 719         {
 720                 OneRoomNetCfg *RNCfg;
 721                 RNCfg = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 722                 if (RNCfg != NULL)
 723                 {
 724                         ReadRoomNetConfigFile(&RNCfg, filename);
 725                 }
 726                 else
 727                 {
 728                         ReadRoomNetConfigFile(&RNCfg, filename);
 729                         Put(RoomConfigs, LKEY(CCC->room.QRnumber), RNCfg, vFreeRoomNetworkStruct);
 730                 }
 731
 732                 PerformRoomHooks(&CCC->room);
 733         }
 734         end_critical_section(S_NETCONFIGS);
 735 }
 736
 737
 738 /*-----------------------------------------------------------------------------*
 739  *                       Per node network configs                              *
 740  *-----------------------------------------------------------------------------*/
 741 void DeleteCtdlNodeConf(void *vNode)
 742 {
 743         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 744         FreeStrBuf(&Node->NodeName);
 745         FreeStrBuf(&Node->Secret);
 746         FreeStrBuf(&Node->Host);
 747         FreeStrBuf(&Node->Port);
 748         free(Node);
 749 }
 750
 751 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 752 {
 753         const char *Pos = NULL;
 754         CtdlNodeConf *Node;
 755
 756         /* we need at least 4 pipes and some other text so its invalid. */
 757         if (StrLength(SerializedNode) < 8)
 758                 return NULL;
 759         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 760
 761         Node->DeleteMe = 0;
 762
 763         Node->NodeName=NewStrBuf();
 764         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 765
 766         Node->Secret=NewStrBuf();
 767         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 768
 769         Node->Host=NewStrBuf();
 770         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 771
 772         Node->Port=NewStrBuf();
 773         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 774         return Node;
 775 }
 776
 777
 778 /*
 779  * Load or refresh the Citadel network (IGnet) configuration for this node.
 780  */
 781 HashList* CtdlLoadIgNetCfg(void)
 782 {
 783         const char *LinePos;
 784         char       *Cfg;
 785         StrBuf     *Buf;
 786         StrBuf     *LineBuf;
 787         HashList   *Hash;
 788         CtdlNodeConf   *Node;
 789
 790         Cfg =  CtdlGetSysConfig(IGNETCFG);
 791         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 792                 if (Cfg != NULL)
 793                         free(Cfg);
 794                 return NULL;
 795         }
 796
 797         Hash = NewHash(1, NULL);
 798         Buf = NewStrBufPlain(Cfg, -1);
 799         free(Cfg);
 800         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 801         LinePos = NULL;
 802         do
 803         {
 804                 StrBufSipLine(LineBuf, Buf, &LinePos);
 805                 if (StrLength(LineBuf) != 0) {
 806                         Node = NewNode(LineBuf);
 807                         if (Node != NULL) {
 808                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 809                         }
 810                 }
 811         } while (LinePos != StrBufNOTNULL);
 812         FreeStrBuf(&Buf);
 813         FreeStrBuf(&LineBuf);
 814         return Hash;
 815 }
 816
 817
 818 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 819 {
 820         const RoomNetCfg RecipientCfgs[] = {
 821                 listrecp,
 822                 digestrecp,
 823                 participate,
 824                 maxRoomNetCfg
 825         };
 826         int i;
 827         RoomNetCfgLine *nptr;
 828         size_t len;
 829
 830         len = strlen(Name);
 831         i = 0;
 832         while (RecipientCfgs[i] != maxRoomNetCfg)
 833         {
 834                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 835
 836                 while (nptr != NULL)
 837                 {
 838                         if ((StrLength(nptr->Value[0]) == len) &&
 839                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 840                         {
 841                                 return 1;
 842                         }
 843                         nptr = nptr->next;
 844                 }
 845                 i++;
 846         }
 847         return 0;
 848 }
 849
 850
 851
 852 int CtdlNetconfigCheckRoomaccess(
 853         char *errmsgbuf,
 854         size_t n,
 855         const char* RemoteIdentifier)
 856 {
 857         OneRoomNetCfg *RNCfg;
 858         int found;
 859
 860         if (RemoteIdentifier == NULL)
 861         {
 862                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 863                 return (ERROR + USERNAME_REQUIRED);
 864         }
 865
 866         begin_critical_section(S_NETCONFIGS);
 867         RNCfg = CtdlGetNetCfgForRoom (CC->room.QRnumber);
 868         if (RNCfg == NULL)
 869         {
 870                 end_critical_section(S_NETCONFIGS);
 871                 snprintf(errmsgbuf, n,
 872                          "This mailing list only accepts posts from subscribers.");
 873                 return (ERROR + NO_SUCH_USER);
 874         }
 875         found = is_recipient (RNCfg, RemoteIdentifier);
 876         end_critical_section(S_NETCONFIGS);
 877
 878         if (found) {
 879                 return (0);
 880         }
 881         else {
 882                 snprintf(errmsgbuf, n,
 883                          "This mailing list only accepts posts from subscribers.");
 884                 return (ERROR + NO_SUCH_USER);
 885         }
 886 }
 887
 888
 889
 890 /*
 891  * cmd_netp() - authenticate to the server as another Citadel node polling
 892  *            for network traffic
 893  */
 894 void cmd_netp(char *cmdbuf)
 895 {
 896         struct CitContext *CCC = CC;
 897         HashList *working_ignetcfg;
 898         char *node;
 899         StrBuf *NodeStr;
 900         long nodelen;
 901         int v;
 902         long lens[2];
 903         const char *strs[2];
 904
 905         const StrBuf *secret = NULL;
 906         const StrBuf *nexthop = NULL;
 907         char err_buf[SIZ] = "";
 908
 909         /* Authenticate */
 910         node = CCC->curr_user;
 911         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 912         NodeStr = NewStrBufPlain(node, nodelen);
 913         /* load the IGnet Configuration to check node validity */
 914         working_ignetcfg = CtdlLoadIgNetCfg();
 915         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 916         if (v != 0) {
 917                 snprintf(err_buf, sizeof err_buf,
 918                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 919                         node, CCC->cs_host, CCC->cs_addr
 920                 );
 921                 syslog(LOG_WARNING, "%s", err_buf);
 922                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 923
 924                 strs[0] = CCC->cs_addr;
 925                 lens[0] = strlen(CCC->cs_addr);
 926
 927                 strs[1] = "SRV_UNKNOWN";
 928                 lens[1] = sizeof("SRV_UNKNOWN" - 1);
 929
 930                 CtdlAideFPMessage(
 931                         err_buf,
 932                         "IGNet Networking.",
 933                         2, strs, (long*) &lens,
 934                         CCC->cs_pid, 0,
 935                         time(NULL));
 936
 937                 DeleteHash(&working_ignetcfg);
 938                 FreeStrBuf(&NodeStr);
 939                 return;
 940         }
 941
 942         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 943         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 944                 snprintf(err_buf, sizeof err_buf,
 945                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 946                         CCC->cs_host, CCC->cs_addr, node
 947                 );
 948                 syslog(LOG_WARNING, "%s", err_buf);
 949                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 950
 951                 strs[0] = CCC->cs_addr;
 952                 lens[0] = strlen(CCC->cs_addr);
 953
 954                 strs[1] = "SRV_PW";
 955                 lens[1] = sizeof("SRV_PW" - 1);
 956
 957                 CtdlAideFPMessage(
 958                         err_buf,
 959                         "IGNet Networking.",
 960                         2, strs,
 961                         (long*) &lens,
 962                         CCC->cs_pid, 0,
 963                         time(NULL));
 964
 965                 DeleteHash(&working_ignetcfg);
 966                 FreeStrBuf(&NodeStr);
 967                 return;
 968         }
 969
 970         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 971                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 972                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 973                 DeleteHash(&working_ignetcfg);
 974                 FreeStrBuf(&NodeStr);
 975                 return;
 976         }
 977         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 978         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 979         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
 980                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 981         );
 982         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 983         DeleteHash(&working_ignetcfg);
 984         FreeStrBuf(&NodeStr);
 985 }
 986
 987
 988 /*-----------------------------------------------------------------------------*
 989  *                 Network maps: evaluate other nodes                          *
 990  *-----------------------------------------------------------------------------*/
 991
 992 void DeleteNetMap(void *vNetMap)
 993 {
 994         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 995         FreeStrBuf(&TheNetMap->NodeName);
 996         FreeStrBuf(&TheNetMap->NextHop);
 997         free(TheNetMap);
 998 }
 999
1000 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
1001 {
1002         const char *Pos = NULL;
1003         CtdlNetMap *NM;
1004
1005         /* we need at least 3 pipes and some other text so its invalid. */
1006         if (StrLength(SerializedNetMap) < 6)
1007                 return NULL;
1008         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
1009
1010         NM->NodeName=NewStrBuf();
1011         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
1012
1013         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
1014
1015         NM->NextHop=NewStrBuf();
1016         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
1017
1018         return NM;
1019 }
1020
1021 HashList* CtdlReadNetworkMap(void)
1022 {
1023         const char *LinePos;
1024         char       *Cfg;
1025         StrBuf     *Buf;
1026         StrBuf     *LineBuf;
1027         HashList   *Hash;
1028         CtdlNetMap     *TheNetMap;
1029
1030         Hash = NewHash(1, NULL);
1031         Cfg =  CtdlGetSysConfig(IGNETMAP);
1032         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
1033                 if (Cfg != NULL)
1034                         free(Cfg);
1035                 return Hash;
1036         }
1037
1038         Buf = NewStrBufPlain(Cfg, -1);
1039         free(Cfg);
1040         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
1041         LinePos = NULL;
1042         while (StrBufSipLine(Buf, LineBuf, &LinePos))
1043         {
1044                 TheNetMap = NewNetMap(LineBuf);
1045                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
1046                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
1047                 }
1048         }
1049         FreeStrBuf(&Buf);
1050         FreeStrBuf(&LineBuf);
1051         return Hash;
1052 }
1053
1054 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
1055 {
1056         void *vMap;
1057         const char *key;
1058         long len;
1059         StrBuf *Ret = NewStrBuf();
1060         HashPos *Pos = GetNewHashPos(Map, 0);
1061
1062         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
1063         {
1064                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
1065                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
1066                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1067
1068                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
1069                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1070
1071                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
1072                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
1073         }
1074         DeleteHashPos(&Pos);
1075         return Ret;
1076 }
1077
1078
1079 /*
1080  * Learn topology from path fields
1081  */
1082 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
1083 {
1084         CtdlNetMap *pNM = NULL;
1085         void *vptr;
1086         char nexthop[256];
1087         CtdlNetMap *nmptr;
1088
1089         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
1090             (vptr != NULL))/* TODO: is the NodeName Uniq? */
1091         {
1092                 pNM = (CtdlNetMap*)vptr;
1093                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
1094                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
1095                         pNM->lastcontact = time(NULL);
1096                         (*netmap_changed) ++;
1097                         return;
1098                 }
1099         }
1100
1101         /* If we got here then it's not in the map, so add it. */
1102         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
1103         nmptr->NodeName = NewStrBufPlain(node, -1);
1104         nmptr->lastcontact = time(NULL);
1105         nmptr->NextHop = NewStrBuf ();
1106         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
1107         /* TODO: is the NodeName Uniq? */
1108         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
1109         (*netmap_changed) ++;
1110 }
1111
1112
1113 /*
1114  * Check the network map and determine whether the supplied node name is
1115  * valid.  If it is not a neighbor node, supply the name of a neighbor node
1116  * which is the next hop.  If it *is* a neighbor node, we also fill in the
1117  * shared secret.
1118  */
1119 int CtdlIsValidNode(const StrBuf **nexthop,
1120                     const StrBuf **secret,
1121                     StrBuf *node,
1122                     HashList *IgnetCfg,
1123                     HashList *the_netmap)
1124 {
1125         void *vNetMap;
1126         void *vNodeConf;
1127         CtdlNodeConf *TheNode;
1128         CtdlNetMap *TheNetMap;
1129
1130         if (StrLength(node) == 0) {
1131                 return(-1);
1132         }
1133
1134         /*
1135          * First try the neighbor nodes
1136          */
1137         if (GetCount(IgnetCfg) == 0) {
1138                 syslog(LOG_INFO, "IgnetCfg is empty!\n");
1139                 if (nexthop != NULL) {
1140                         *nexthop = NULL;
1141                 }
1142                 return(-1);
1143         }
1144
1145         /* try to find a neigbour with the name 'node' */
1146         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
1147             (vNodeConf != NULL))
1148         {
1149                 TheNode = (CtdlNodeConf*)vNodeConf;
1150                 if (secret != NULL)
1151                         *secret = TheNode->Secret;
1152                 return 0;               /* yup, it's a direct neighbor */
1153         }
1154
1155         /*
1156          * If we get to this point we have to see if we know the next hop
1157          *//* TODO: is the NodeName Uniq? */
1158         if ((GetCount(the_netmap) > 0) &&
1159             (GetHash(the_netmap, SKEY(node), &vNetMap)))
1160         {
1161                 TheNetMap = (CtdlNetMap*)vNetMap;
1162                 if (nexthop != NULL)
1163                         *nexthop = TheNetMap->NextHop;
1164                 return(0);
1165         }
1166
1167         /*
1168          * If we get to this point, the supplied node name is bogus.
1169          */
1170         syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
1171         return(-1);
1172 }
1173
1174
1175 void destroy_network_cfgs(void)
1176 {
1177         HashList *pCfgTypeHash = CfgTypeHash;
1178         HashList *pRoomConfigs;
1179
1180         begin_critical_section(S_NETCONFIGS);
1181         pRoomConfigs = RoomConfigs;
1182         RoomConfigs = NULL;
1183         end_critical_section(S_NETCONFIGS);
1184         DeleteHash(&pRoomConfigs);
1185
1186         CfgTypeHash = NULL;
1187         DeleteHash(&pCfgTypeHash);
1188 }
1189
1190 /*
1191  * Module entry point
1192  */
1193 CTDL_MODULE_INIT(netconfig)
1194 {
1195         if (!threading)
1196         {
1197                 CtdlRegisterCleanupHook(destroy_network_cfgs);
1198                 LoadAllNetConfigs ();
1199                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1200                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1201                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1202         }
1203         return "netconfig";
1204 }