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 #include "config.h"
  34
  35 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg);
  36 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg);
  37
  38 HashList *CfgTypeHash = NULL;
  39 HashList *RoomConfigs = NULL;
  40 /*-----------------------------------------------------------------------------*
  41  *                       Per room network configs                              *
  42  *-----------------------------------------------------------------------------*/
  43 void RegisterRoomCfgType(const char* Name, long len, RoomNetCfg eCfg, CfgLineParser p, int uniq,  int nSegments, CfgLineSerializer s, CfgLineDeAllocator d)
  44 {
  45         CfgLineType *pCfg;
  46
  47         pCfg = (CfgLineType*) malloc(sizeof(CfgLineType));
  48         pCfg->Parser = p;
  49         pCfg->Serializer = s;
  50         pCfg->DeAllocator = d;
  51         pCfg->C = eCfg;
  52         pCfg->Str.Key = Name;
  53         pCfg->Str.len = len;
  54         pCfg->IsSingleLine = uniq;
  55         pCfg->nSegments = nSegments;
  56         if (CfgTypeHash == NULL)
  57                 CfgTypeHash = NewHash(1, NULL);
  58         Put(CfgTypeHash, Name, len, pCfg, NULL);
  59 }
  60
  61
  62 const CfgLineType *GetCfgTypeByStr(const char *Key, long len)
  63 {
  64         void *pv;
  65
  66         if (GetHash(CfgTypeHash, Key, len, &pv) && (pv != NULL))
  67         {
  68                 return (const CfgLineType *) pv;
  69         }
  70         else
  71         {
  72                 return NULL;
  73         }
  74 }
  75
  76 const CfgLineType *GetCfgTypeByEnum(RoomNetCfg eCfg, HashPos *It)
  77 {
  78         const char *Key;
  79         long len;
  80         void *pv;
  81         CfgLineType *pCfg;
  82
  83         RewindHashPos(CfgTypeHash, It, 1);
  84         while (GetNextHashPos(CfgTypeHash, It, &len, &Key, &pv) && (pv != NULL))
  85         {
  86                 pCfg = (CfgLineType*) pv;
  87                 if (pCfg->C == eCfg)
  88                         return pCfg;
  89         }
  90         return NULL;
  91 }
  92 void ParseGeneric(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCfg)
  93 {
  94         RoomNetCfgLine *nptr;
  95         int i;
  96
  97         nptr = (RoomNetCfgLine *)
  98                 malloc(sizeof(RoomNetCfgLine));
  99         nptr->next = OneRNCfg->NetConfigs[ThisOne->C];
 100         nptr->Value = malloc(sizeof(StrBuf*) * ThisOne->nSegments);
 101         nptr->nValues = 0;
 102         memset(nptr->Value, 0, sizeof(StrBuf*) * ThisOne->nSegments);
 103         if (ThisOne->nSegments == 1)
 104         {
 105                 nptr->Value[0] = NewStrBufPlain(LinePos, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 106                 nptr->nValues = 1;
 107         }
 108         else for (i = 0; i < ThisOne->nSegments; i++)
 109         {
 110                 nptr->nValues++;
 111                 nptr->Value[i] = NewStrBufPlain(NULL, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 112                 StrBufExtract_NextToken(nptr->Value[i], Line, &LinePos, '|');
 113         }
 114
 115         OneRNCfg->NetConfigs[ThisOne->C] = nptr;
 116 }
 117
 118 void SerializeGeneric(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *OneRNCfg, RoomNetCfgLine *data)
 119 {
 120         int i;
 121
 122         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 123         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 124         for (i = 0; i < ThisOne->nSegments; i++)
 125         {
 126                 StrBufAppendBuf(OutputBuffer, data->Value[i], 0);
 127                 if (i + 1 < ThisOne->nSegments)
 128                         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 129         }
 130         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 131 }
 132
 133 void DeleteGenericCfgLine(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 134 {
 135         int i;
 136
 137         if (*data == NULL)
 138                 return;
 139
 140         for (i = 0; i < (*data)->nValues; i++)
 141         {
 142                 FreeStrBuf(&(*data)->Value[i]);
 143         }
 144         free ((*data)->Value);
 145         free(*data);
 146         *data = NULL;
 147 }
 148 RoomNetCfgLine *DuplicateOneGenericCfgLine(const RoomNetCfgLine *data)
 149 {
 150         int i;
 151         RoomNetCfgLine *NewData;
 152
 153         NewData = (RoomNetCfgLine*)malloc(sizeof(RoomNetCfgLine));
 154         memset(NewData, 0, sizeof(RoomNetCfgLine));
 155         NewData->Value = (StrBuf **)malloc(sizeof(StrBuf*) * data->nValues);
 156         memset(NewData->Value, 0, sizeof(StrBuf*) * data->nValues);
 157
 158         for (i = 0; i < data->nValues; i++)
 159         {
 160                 NewData->Value[i] = NewStrBufDup(data->Value[i]);
 161         }
 162         NewData->nValues = data->nValues;
 163         return NewData;
 164 }
 165 int ReadRoomNetConfigFile(OneRoomNetCfg **pOneRNCfg, char *filename)
 166 {
 167         int fd;
 168         const char *ErrStr = NULL;
 169         const char *Pos;
 170         const CfgLineType *pCfg;
 171         StrBuf *Line;
 172         StrBuf *InStr;
 173         OneRoomNetCfg *OneRNCfg = NULL;
 174
 175         fd = open(filename, O_NONBLOCK|O_RDONLY);
 176         if (fd == -1) {
 177                 *pOneRNCfg = NULL;
 178                 return 0;
 179         }
 180         fchown(fd, CTDLUID, (-1));
 181         fchmod(fd, 0600);
 182
 183         if (*pOneRNCfg != NULL)
 184         {
 185                 OneRNCfg = *pOneRNCfg;
 186                 FreeRoomNetworkStructContent (OneRNCfg);
 187         }
 188         else
 189                 OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 190         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 191         *pOneRNCfg = OneRNCfg;
 192         Line = NewStrBuf();
 193         InStr = NewStrBuf();
 194
 195         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 196                 if (StrLength(Line) == 0)
 197                         continue;
 198                 Pos = NULL;
 199                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 200
 201                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 202                 if (pCfg != NULL)
 203                 {
 204                         pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 205                 }
 206                 else
 207                 {
 208                         if (OneRNCfg->misc == NULL)
 209                         {
 210                                 OneRNCfg->misc = NewStrBufDup(Line);
 211                         }
 212                         else
 213                         {
 214                                 if(StrLength(OneRNCfg->misc) > 0)
 215                                         StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 216                                 StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 217                         }
 218                 }
 219         }
 220         if (fd > 0)
 221                 close(fd);
 222         FreeStrBuf(&InStr);
 223         FreeStrBuf(&Line);
 224         return 1;
 225 }
 226
 227 int SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, char *filename)
 228 {
 229         RoomNetCfg eCfg;
 230         StrBuf *Cfg = NULL;
 231         StrBuf *OutBuffer = NULL;
 232         char tempfilename[PATH_MAX];
 233         int TmpFD;
 234         long len;
 235         time_t unixtime;
 236         struct timeval tv;
 237         long reltid; /* if we don't have SYS_gettid, use "random" value */
 238         int rc;
 239         HashPos *CfgIt;
 240
 241         len = strlen(filename);
 242         memcpy(tempfilename, filename, len + 1);
 243
 244 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 245         reltid = syscall(SYS_gettid);
 246 #endif
 247         gettimeofday(&tv, NULL);
 248         /* Promote to time_t; types differ on some OSes (like darwin) */
 249         unixtime = tv.tv_sec;
 250
 251         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 252         errno = 0;
 253         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 254         Cfg = NewStrBuf();
 255         if ((TmpFD < 0) || (errno != 0)) {
 256                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 257                         filename, strerror(errno));
 258                 unlink(tempfilename);
 259                 FreeStrBuf(&Cfg);
 260                 return 0;
 261         }
 262         else {
 263                 OutBuffer = NewStrBuf();
 264                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 265                 fchown(TmpFD, config.c_ctdluid, 0);
 266                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 267                 {
 268                         const CfgLineType *pCfg;
 269                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 270                         if (pCfg->IsSingleLine)
 271                         {
 272                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 273                         }
 274                         else
 275                         {
 276                                 RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 277                                 while (pName != NULL)
 278                                 {
 279                                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 280                                         pName = pName->next;
 281                                 }
 282
 283
 284                         }
 285
 286                 }
 287                 DeleteHashPos(&CfgIt);
 288
 289
 290                 if (OneRNCfg->misc != NULL) {
 291                         StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 292                 }
 293
 294                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 295                 if ((rc >=0 ) && (rc == StrLength(OutBuffer)))
 296                 {
 297                         close(TmpFD);
 298                         rename(tempfilename, filename);
 299                         rc = 1;
 300                 }
 301                 else {
 302                         syslog(LOG_EMERG,
 303                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 304                                       tempfilename,
 305                                       strerror(errno));
 306                         close(TmpFD);
 307                         unlink(tempfilename);
 308                         rc = 0;
 309                 }
 310                 FreeStrBuf(&OutBuffer);
 311
 312         }
 313         FreeStrBuf(&Cfg);
 314         return rc;
 315 }
 316
 317 void SaveModifiedRooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 318 {
 319         char filename[PATH_MAX];
 320
 321         if (OneRNCfg->changed)
 322         {
 323                 assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 324                 SaveRoomNetConfigFile(OneRNCfg, filename);
 325                 OneRNCfg->changed = 0;
 326         }
 327 }
 328 void SaveChangedConfigs(void)
 329 {
 330         CtdlForEachNetCfgRoom(SaveModifiedRooms,
 331                               NULL,
 332                               maxRoomNetCfg);
 333 }
 334
 335
 336 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 337 {
 338         int new = 0;
 339         RoomNetCfgLine **pLine;
 340         char filename[PATH_MAX];
 341
 342         if (OneRNCfg == NULL)
 343         {
 344                 new = 1;
 345                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 346                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 347         }
 348         pLine = &OneRNCfg->NetConfigs[LineType];
 349
 350         while(*pLine != NULL) pLine = &((*pLine)->next);
 351         *pLine = Line;
 352
 353         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 354         SaveRoomNetConfigFile(OneRNCfg, filename);
 355         OneRNCfg->changed = 0;
 356         if (new)
 357         {
 358                 Put(RoomConfigs, LKEY(qrbuf->QRnumber), OneRNCfg, vFreeRoomNetworkStruct);
 359         }
 360 }
 361
 362 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 363 {
 364         RoomNetCfg eCfg;
 365         HashPos *CfgIt;
 366
 367         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 368         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 369         {
 370                 const CfgLineType *pCfg;
 371                 RoomNetCfgLine *pNext, *pName;
 372
 373                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 374                 pName= OneRNCfg->NetConfigs[eCfg];
 375                 while (pName != NULL)
 376                 {
 377                         pNext = pName->next;
 378                         if (pCfg != NULL)
 379                         {
 380                                 pCfg->DeAllocator(pCfg, &pName);
 381                         }
 382                         else
 383                         {
 384                                 DeleteGenericCfgLine(NULL, &pName);
 385                         }
 386                         pName = pNext;
 387                 }
 388         }
 389         DeleteHashPos(&CfgIt);
 390
 391         FreeStrBuf(&OneRNCfg->Sender);
 392         FreeStrBuf(&OneRNCfg->RoomInfo);
 393         FreeStrBuf(&OneRNCfg->misc);
 394         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 395 }
 396 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 397 {
 398         OneRoomNetCfg *OneRNCfg;
 399         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 400         FreeRoomNetworkStructContent(OneRNCfg);
 401         free(OneRNCfg);
 402 }
 403 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 404 {
 405         vFreeRoomNetworkStruct(*pOneRNCfg);
 406         *pOneRNCfg=NULL;
 407 }
 408
 409 OneRoomNetCfg* CtdlGetNetCfgForRoom(long QRNumber)
 410 {
 411         void *pv;
 412         GetHash(RoomConfigs, LKEY(QRNumber), &pv);
 413         return (OneRoomNetCfg*)pv;
 414 }
 415
 416
 417 void LoadAllNetConfigs(void)
 418 {
 419         DIR *filedir = NULL;
 420         struct dirent *d;
 421         struct dirent *filedir_entry;
 422         int d_type = 0;
 423         int d_namelen;
 424         long RoomNumber;
 425         OneRoomNetCfg *OneRNCfg;
 426         int IsNumOnly;
 427         const char *pch;
 428         char path[PATH_MAX];
 429
 430         RoomConfigs = NewHash(1, NULL);
 431         filedir = opendir (ctdl_netcfg_dir);
 432         if (filedir == NULL) {
 433                 return ; /// todo: panic!
 434         }
 435
 436         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 437         if (d == NULL) {
 438                 closedir(filedir);
 439                 return ;
 440         }
 441
 442         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 443                (filedir_entry != NULL))
 444         {
 445 #ifdef _DIRENT_HAVE_D_NAMLEN
 446                 d_namelen = filedir_entry->d_namlen;
 447 #else
 448                 d_namelen = strlen(filedir_entry->d_name);
 449 #endif
 450
 451 #ifdef _DIRENT_HAVE_D_TYPE
 452                 d_type = filedir_entry->d_type;
 453 #else
 454
 455 #ifndef DT_UNKNOWN
 456 #define DT_UNKNOWN     0
 457 #define DT_DIR         4
 458 #define DT_REG         8
 459 #define DT_LNK         10
 460
 461 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 462 #define DTTOIF(dirtype)        ((dirtype) << 12)
 463 #endif
 464                 d_type = DT_UNKNOWN;
 465 #endif
 466                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 467                         continue; /* Ignore backup files... */
 468
 469                 if ((d_namelen == 1) &&
 470                     (filedir_entry->d_name[0] == '.'))
 471                         continue;
 472
 473                 if ((d_namelen == 2) &&
 474                     (filedir_entry->d_name[0] == '.') &&
 475                     (filedir_entry->d_name[1] == '.'))
 476                         continue;
 477
 478                 snprintf(path, PATH_MAX, "%s/%s",
 479                          ctdl_netcfg_dir, filedir_entry->d_name);
 480
 481                 if (d_type == DT_UNKNOWN) {
 482                         struct stat s;
 483                         if (lstat(path, &s) == 0) {
 484                                 d_type = IFTODT(s.st_mode);
 485                         }
 486                 }
 487
 488                 switch (d_type)
 489                 {
 490                 case DT_DIR:
 491                         break;
 492                 case DT_LNK: /* TODO: check whether its a file or a directory */
 493                 case DT_REG:
 494                         IsNumOnly = 1;
 495                         pch = filedir_entry->d_name;
 496                         while (*pch != '\0')
 497                         {
 498                                 if (!isdigit(*pch))
 499                                 {
 500                                         IsNumOnly = 0;
 501                                 }
 502                                 pch ++;
 503                         }
 504                         if (IsNumOnly)
 505                         {
 506                                 OneRNCfg = NULL;
 507                                 RoomNumber = atol(filedir_entry->d_name);
 508                                 ReadRoomNetConfigFile(&OneRNCfg, path);
 509
 510                                 if (OneRNCfg != NULL)
 511                                         Put(RoomConfigs, LKEY(RoomNumber), OneRNCfg, vFreeRoomNetworkStruct);
 512                                 /* syslog(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 513                         }
 514                         break;
 515                 default:
 516                         break;
 517                 }
 518
 519
 520         }
 521         free(d);
 522         closedir(filedir);
 523 }
 524
 525
 526 /*-----------------------------------------------------------------------------*
 527  *              Per room network configs : exchange with client                *
 528  *-----------------------------------------------------------------------------*/
 529 void cmd_gnet(char *argbuf)
 530 {
 531         char filename[PATH_MAX];
 532         char buf[SIZ];
 533         FILE *fp;
 534
 535
 536         if (!IsEmptyStr(argbuf))
 537         {
 538                 if (CtdlAccessCheck(ac_aide)) return;
 539                 if (strcmp(argbuf, FILE_MAILALIAS))
 540                 {
 541                         cprintf("%d No such file or directory\n",
 542                                 ERROR + INTERNAL_ERROR);
 543                         return;
 544                 }
 545                 safestrncpy(filename, file_mail_aliases, sizeof(filename));
 546                 cprintf("%d Settings for <%s>\n",
 547                         LISTING_FOLLOWS,
 548                         filename);
 549         }
 550         else
 551         {
 552                 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 553                         /* users can edit the netconfigs for their own mailbox rooms */
 554                 }
 555                 else if (CtdlAccessCheck(ac_room_aide)) return;
 556
 557                 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 558                 cprintf("%d Network settings for room #%ld <%s>\n",
 559                         LISTING_FOLLOWS,
 560                         CC->room.QRnumber, CC->room.QRname);
 561         }
 562
 563         fp = fopen(filename, "r");
 564         if (fp != NULL) {
 565                 while (fgets(buf, sizeof buf, fp) != NULL) {
 566                         buf[strlen(buf)-1] = 0;
 567                         cprintf("%s\n", buf);
 568                 }
 569                 fclose(fp);
 570         }
 571
 572         cprintf("000\n");
 573 }
 574
 575 #define nForceAliases 5
 576 const ConstStr ForceAliases[nForceAliases] = {
 577         {HKEY("bbs,")},
 578         {HKEY("root,")},
 579         {HKEY("Auto,")},
 580         {HKEY("postmaster,")},
 581         {HKEY("abuse,")}
 582 };
 583 void cmd_snet(char *argbuf)
 584 {
 585         struct CitContext *CCC = CC;
 586         char tempfilename[PATH_MAX];
 587         char filename[PATH_MAX];
 588         int TmpFD;
 589         StrBuf *Line;
 590         struct stat StatBuf;
 591         long len;
 592         int rc;
 593         int IsMailAlias = 0;
 594         int MailAliasesFound[nForceAliases];
 595
 596         unbuffer_output();
 597
 598         if (!IsEmptyStr(argbuf))
 599         {
 600                 if (CtdlAccessCheck(ac_aide)) return;
 601                 if (strcmp(argbuf, FILE_MAILALIAS))
 602                 {
 603                         cprintf("%d No such file or directory\n",
 604                                 ERROR + INTERNAL_ERROR);
 605                         return;
 606                 }
 607                 len = safestrncpy(filename, file_mail_aliases, sizeof(filename));
 608                 memset(MailAliasesFound, 0, sizeof(MailAliasesFound));
 609                 memcpy(tempfilename, filename, len + 1);
 610                 IsMailAlias = 1;
 611         }
 612         else
 613         {
 614                 if ( (CCC->room.QRflags & QR_MAILBOX) && (CCC->user.usernum == atol(CCC->room.QRname)) ) {
 615                         /* users can edit the netconfigs for their own mailbox rooms */
 616                 }
 617                 else if (CtdlAccessCheck(ac_room_aide)) return;
 618
 619                 len = assoc_file_name(filename, sizeof filename, &CCC->room, ctdl_netcfg_dir);
 620                 memcpy(tempfilename, filename, len + 1);
 621         }
 622         memset(&StatBuf, 0, sizeof(struct stat));
 623         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 624                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 625
 626         sprintf(tempfilename + len, ".%d", CCC->cs_pid);
 627         errno = 0;
 628         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 629
 630         if ((TmpFD > 0) && (errno == 0))
 631         {
 632                 char *tmp = malloc(StatBuf.st_size * 2);
 633                 memset(tmp, ' ', StatBuf.st_size * 2);
 634                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 635                 free(tmp);
 636                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 637                 {
 638                         close(TmpFD);
 639                         cprintf("%d Unable to allocate the space required for %s: %s\n",
 640                                 ERROR + INTERNAL_ERROR,
 641                                 tempfilename,
 642                                 strerror(errno));
 643                         unlink(tempfilename);
 644                         return;
 645                 }
 646                 lseek(TmpFD, SEEK_SET, 0);
 647         }
 648         else {
 649                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 650                         ERROR + INTERNAL_ERROR,
 651                         tempfilename,
 652                         strerror(errno));
 653                 unlink(tempfilename);
 654                 return;
 655         }
 656         Line = NewStrBuf();
 657
 658         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 659
 660         len = 0;
 661         while (rc = CtdlClientGetLine(Line),
 662                (rc >= 0))
 663         {
 664                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 665                         break;
 666                 if (IsMailAlias)
 667                 {
 668                         int i;
 669
 670                         for (i = 0; i < nForceAliases; i++)
 671                         {
 672                                 if ((!MailAliasesFound[i]) &&
 673                                     (strncmp(ForceAliases[i].Key,
 674                                              ChrPtr(Line),
 675                                              ForceAliases[i].len) == 0)
 676                                         )
 677                                     {
 678                                             MailAliasesFound[i] = 1;
 679                                             break;
 680                                     }
 681                         }
 682                 }
 683
 684                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 685                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 686                 len += StrLength(Line);
 687         }
 688         FreeStrBuf(&Line);
 689         ftruncate(TmpFD, len);
 690         close(TmpFD);
 691
 692         if (IsMailAlias)
 693         {
 694                 int i, state;
 695                 /*
 696                  * Sanity check whether all aliases required by the RFCs were set
 697                  * else bail out.
 698                  */
 699                 state = 1;
 700                 for (i = 0; i < nForceAliases; i++)
 701                 {
 702                         if (!MailAliasesFound[i])
 703                                 state = 0;
 704                 }
 705                 if (state == 0)
 706                 {
 707                         cprintf("%d won't do this - you're missing an RFC required alias.\n",
 708                                 ERROR + INTERNAL_ERROR);
 709                         unlink(tempfilename);
 710                         return;
 711                 }
 712         }
 713
 714         /* Now copy the temp file to its permanent location.
 715          * (We copy instead of link because they may be on different filesystems)
 716          */
 717         begin_critical_section(S_NETCONFIGS);
 718         rename(tempfilename, filename);
 719         if (!IsMailAlias)
 720         {
 721                 OneRoomNetCfg *RNCfg;
 722                 RNCfg = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 723                 if (RNCfg != NULL)
 724                 {
 725                         ReadRoomNetConfigFile(&RNCfg, filename);
 726                 }
 727                 else
 728                 {
 729                         ReadRoomNetConfigFile(&RNCfg, filename);
 730                         Put(RoomConfigs, LKEY(CCC->room.QRnumber), RNCfg, vFreeRoomNetworkStruct);
 731                 }
 732
 733                 PerformRoomHooks(&CCC->room);
 734         }
 735         end_critical_section(S_NETCONFIGS);
 736 }
 737
 738
 739 /*-----------------------------------------------------------------------------*
 740  *                       Per node network configs                              *
 741  *-----------------------------------------------------------------------------*/
 742 void DeleteCtdlNodeConf(void *vNode)
 743 {
 744         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 745         FreeStrBuf(&Node->NodeName);
 746         FreeStrBuf(&Node->Secret);
 747         FreeStrBuf(&Node->Host);
 748         FreeStrBuf(&Node->Port);
 749         free(Node);
 750 }
 751
 752 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 753 {
 754         const char *Pos = NULL;
 755         CtdlNodeConf *Node;
 756
 757         /* we need at least 4 pipes and some other text so its invalid. */
 758         if (StrLength(SerializedNode) < 8)
 759                 return NULL;
 760         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 761
 762         Node->DeleteMe = 0;
 763
 764         Node->NodeName=NewStrBuf();
 765         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 766
 767         Node->Secret=NewStrBuf();
 768         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 769
 770         Node->Host=NewStrBuf();
 771         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 772
 773         Node->Port=NewStrBuf();
 774         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 775         return Node;
 776 }
 777
 778
 779 /*
 780  * Load or refresh the Citadel network (IGnet) configuration for this node.
 781  */
 782 HashList* CtdlLoadIgNetCfg(void)
 783 {
 784         const char *LinePos;
 785         char       *Cfg;
 786         StrBuf     *Buf;
 787         StrBuf     *LineBuf;
 788         HashList   *Hash;
 789         CtdlNodeConf   *Node;
 790
 791         Cfg =  CtdlGetSysConfig(IGNETCFG);
 792         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 793                 if (Cfg != NULL)
 794                         free(Cfg);
 795                 return NULL;
 796         }
 797
 798         Hash = NewHash(1, NULL);
 799         Buf = NewStrBufPlain(Cfg, -1);
 800         free(Cfg);
 801         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 802         LinePos = NULL;
 803         do
 804         {
 805                 StrBufSipLine(LineBuf, Buf, &LinePos);
 806                 if (StrLength(LineBuf) != 0) {
 807                         Node = NewNode(LineBuf);
 808                         if (Node != NULL) {
 809                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 810                         }
 811                 }
 812         } while (LinePos != StrBufNOTNULL);
 813         FreeStrBuf(&Buf);
 814         FreeStrBuf(&LineBuf);
 815         return Hash;
 816 }
 817
 818
 819 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 820 {
 821         const RoomNetCfg RecipientCfgs[] = {
 822                 listrecp,
 823                 digestrecp,
 824                 participate,
 825                 maxRoomNetCfg
 826         };
 827         int i;
 828         RoomNetCfgLine *nptr;
 829         size_t len;
 830
 831         len = strlen(Name);
 832         i = 0;
 833         while (RecipientCfgs[i] != maxRoomNetCfg)
 834         {
 835                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 836
 837                 while (nptr != NULL)
 838                 {
 839                         if ((StrLength(nptr->Value[0]) == len) &&
 840                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 841                         {
 842                                 return 1;
 843                         }
 844                         nptr = nptr->next;
 845                 }
 846                 i++;
 847         }
 848         return 0;
 849 }
 850
 851
 852
 853 int CtdlNetconfigCheckRoomaccess(
 854         char *errmsgbuf,
 855         size_t n,
 856         const char* RemoteIdentifier)
 857 {
 858         OneRoomNetCfg *RNCfg;
 859         int found;
 860
 861         if (RemoteIdentifier == NULL)
 862         {
 863                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 864                 return (ERROR + USERNAME_REQUIRED);
 865         }
 866
 867         begin_critical_section(S_NETCONFIGS);
 868         RNCfg = CtdlGetNetCfgForRoom (CC->room.QRnumber);
 869         if (RNCfg == NULL)
 870         {
 871                 end_critical_section(S_NETCONFIGS);
 872                 snprintf(errmsgbuf, n,
 873                          "This mailing list only accepts posts from subscribers.");
 874                 return (ERROR + NO_SUCH_USER);
 875         }
 876         found = is_recipient (RNCfg, RemoteIdentifier);
 877         end_critical_section(S_NETCONFIGS);
 878
 879         if (found) {
 880                 return (0);
 881         }
 882         else {
 883                 snprintf(errmsgbuf, n,
 884                          "This mailing list only accepts posts from subscribers.");
 885                 return (ERROR + NO_SUCH_USER);
 886         }
 887 }
 888
 889
 890
 891 /*
 892  * cmd_netp() - authenticate to the server as another Citadel node polling
 893  *            for network traffic
 894  */
 895 void cmd_netp(char *cmdbuf)
 896 {
 897         struct CitContext *CCC = CC;
 898         HashList *working_ignetcfg;
 899         char *node;
 900         StrBuf *NodeStr;
 901         long nodelen;
 902         int v;
 903         long lens[2];
 904         const char *strs[2];
 905
 906         const StrBuf *secret = NULL;
 907         const StrBuf *nexthop = NULL;
 908         char err_buf[SIZ] = "";
 909
 910         /* Authenticate */
 911         node = CCC->curr_user;
 912         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 913         NodeStr = NewStrBufPlain(node, nodelen);
 914         /* load the IGnet Configuration to check node validity */
 915         working_ignetcfg = CtdlLoadIgNetCfg();
 916         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 917         if (v != 0) {
 918                 snprintf(err_buf, sizeof err_buf,
 919                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 920                         node, CCC->cs_host, CCC->cs_addr
 921                 );
 922                 syslog(LOG_WARNING, "%s", err_buf);
 923                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 924
 925                 strs[0] = CCC->cs_addr;
 926                 lens[0] = strlen(CCC->cs_addr);
 927
 928                 strs[1] = "SRV_UNKNOWN";
 929                 lens[1] = sizeof("SRV_UNKNOWN") - 1;
 930
 931                 CtdlAideFPMessage(
 932                         err_buf,
 933                         "IGNet Networking.",
 934                         2, strs, (long*) &lens,
 935                         CCC->cs_pid, 0,
 936                         time(NULL));
 937
 938                 DeleteHash(&working_ignetcfg);
 939                 FreeStrBuf(&NodeStr);
 940                 return;
 941         }
 942
 943         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 944         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 945                 snprintf(err_buf, sizeof err_buf,
 946                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 947                         CCC->cs_host, CCC->cs_addr, node
 948                 );
 949                 syslog(LOG_WARNING, "%s", err_buf);
 950                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 951
 952                 strs[0] = CCC->cs_addr;
 953                 lens[0] = strlen(CCC->cs_addr);
 954
 955                 strs[1] = "SRV_PW";
 956                 lens[1] = sizeof("SRV_PW") - 1;
 957
 958                 CtdlAideFPMessage(
 959                         err_buf,
 960                         "IGNet Networking.",
 961                         2, strs,
 962                         (long*) &lens,
 963                         CCC->cs_pid, 0,
 964                         time(NULL));
 965
 966                 DeleteHash(&working_ignetcfg);
 967                 FreeStrBuf(&NodeStr);
 968                 return;
 969         }
 970
 971         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 972                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 973                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 974                 DeleteHash(&working_ignetcfg);
 975                 FreeStrBuf(&NodeStr);
 976                 return;
 977         }
 978         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 979         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 980         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
 981                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 982         );
 983         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 984         DeleteHash(&working_ignetcfg);
 985         FreeStrBuf(&NodeStr);
 986 }
 987
 988
 989 /*-----------------------------------------------------------------------------*
 990  *                 Network maps: evaluate other nodes                          *
 991  *-----------------------------------------------------------------------------*/
 992
 993 void DeleteNetMap(void *vNetMap)
 994 {
 995         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 996         FreeStrBuf(&TheNetMap->NodeName);
 997         FreeStrBuf(&TheNetMap->NextHop);
 998         free(TheNetMap);
 999 }
1000
1001 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
1002 {
1003         const char *Pos = NULL;
1004         CtdlNetMap *NM;
1005
1006         /* we need at least 3 pipes and some other text so its invalid. */
1007         if (StrLength(SerializedNetMap) < 6)
1008                 return NULL;
1009         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
1010
1011         NM->NodeName=NewStrBuf();
1012         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
1013
1014         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
1015
1016         NM->NextHop=NewStrBuf();
1017         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
1018
1019         return NM;
1020 }
1021
1022 HashList* CtdlReadNetworkMap(void)
1023 {
1024         const char *LinePos;
1025         char       *Cfg;
1026         StrBuf     *Buf;
1027         StrBuf     *LineBuf;
1028         HashList   *Hash;
1029         CtdlNetMap     *TheNetMap;
1030
1031         Hash = NewHash(1, NULL);
1032         Cfg =  CtdlGetSysConfig(IGNETMAP);
1033         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
1034                 if (Cfg != NULL)
1035                         free(Cfg);
1036                 return Hash;
1037         }
1038
1039         Buf = NewStrBufPlain(Cfg, -1);
1040         free(Cfg);
1041         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
1042         LinePos = NULL;
1043         while (StrBufSipLine(Buf, LineBuf, &LinePos))
1044         {
1045                 TheNetMap = NewNetMap(LineBuf);
1046                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
1047                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
1048                 }
1049         }
1050         FreeStrBuf(&Buf);
1051         FreeStrBuf(&LineBuf);
1052         return Hash;
1053 }
1054
1055 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
1056 {
1057         void *vMap;
1058         const char *key;
1059         long len;
1060         StrBuf *Ret = NewStrBuf();
1061         HashPos *Pos = GetNewHashPos(Map, 0);
1062
1063         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
1064         {
1065                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
1066                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
1067                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1068
1069                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
1070                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1071
1072                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
1073                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
1074         }
1075         DeleteHashPos(&Pos);
1076         return Ret;
1077 }
1078
1079
1080 /*
1081  * Learn topology from path fields
1082  */
1083 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
1084 {
1085         CtdlNetMap *pNM = NULL;
1086         void *vptr;
1087         char nexthop[256];
1088         CtdlNetMap *nmptr;
1089
1090         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
1091             (vptr != NULL))/* TODO: is the NodeName Uniq? */
1092         {
1093                 pNM = (CtdlNetMap*)vptr;
1094                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
1095                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
1096                         pNM->lastcontact = time(NULL);
1097                         (*netmap_changed) ++;
1098                         return;
1099                 }
1100         }
1101
1102         /* If we got here then it's not in the map, so add it. */
1103         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
1104         nmptr->NodeName = NewStrBufPlain(node, -1);
1105         nmptr->lastcontact = time(NULL);
1106         nmptr->NextHop = NewStrBuf ();
1107         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
1108         /* TODO: is the NodeName Uniq? */
1109         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
1110         (*netmap_changed) ++;
1111 }
1112
1113
1114 /*
1115  * Check the network map and determine whether the supplied node name is
1116  * valid.  If it is not a neighbor node, supply the name of a neighbor node
1117  * which is the next hop.  If it *is* a neighbor node, we also fill in the
1118  * shared secret.
1119  */
1120 int CtdlIsValidNode(const StrBuf **nexthop,
1121                     const StrBuf **secret,
1122                     StrBuf *node,
1123                     HashList *IgnetCfg,
1124                     HashList *the_netmap)
1125 {
1126         void *vNetMap;
1127         void *vNodeConf;
1128         CtdlNodeConf *TheNode;
1129         CtdlNetMap *TheNetMap;
1130
1131         if (StrLength(node) == 0) {
1132                 return(-1);
1133         }
1134
1135         /*
1136          * First try the neighbor nodes
1137          */
1138         if (GetCount(IgnetCfg) == 0) {
1139                 syslog(LOG_INFO, "IgnetCfg is empty!\n");
1140                 if (nexthop != NULL) {
1141                         *nexthop = NULL;
1142                 }
1143                 return(-1);
1144         }
1145
1146         /* try to find a neigbour with the name 'node' */
1147         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
1148             (vNodeConf != NULL))
1149         {
1150                 TheNode = (CtdlNodeConf*)vNodeConf;
1151                 if (secret != NULL)
1152                         *secret = TheNode->Secret;
1153                 return 0;               /* yup, it's a direct neighbor */
1154         }
1155
1156         /*
1157          * If we get to this point we have to see if we know the next hop
1158          *//* TODO: is the NodeName Uniq? */
1159         if ((GetCount(the_netmap) > 0) &&
1160             (GetHash(the_netmap, SKEY(node), &vNetMap)))
1161         {
1162                 TheNetMap = (CtdlNetMap*)vNetMap;
1163                 if (nexthop != NULL)
1164                         *nexthop = TheNetMap->NextHop;
1165                 return(0);
1166         }
1167
1168         /*
1169          * If we get to this point, the supplied node name is bogus.
1170          */
1171         syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
1172         return(-1);
1173 }
1174
1175
1176 void destroy_network_cfgs(void)
1177 {
1178         HashList *pCfgTypeHash = CfgTypeHash;
1179         HashList *pRoomConfigs;
1180
1181         begin_critical_section(S_NETCONFIGS);
1182         pRoomConfigs = RoomConfigs;
1183         RoomConfigs = NULL;
1184         end_critical_section(S_NETCONFIGS);
1185         DeleteHash(&pRoomConfigs);
1186
1187         CfgTypeHash = NULL;
1188         DeleteHash(&pCfgTypeHash);
1189 }
1190
1191 /*
1192  * Module entry point
1193  */
1194 CTDL_MODULE_INIT(netconfig)
1195 {
1196         if (!threading)
1197         {
1198                 CtdlRegisterCleanupHook(destroy_network_cfgs);
1199                 LoadAllNetConfigs ();
1200                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1201                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1202                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1203         }
1204         return "netconfig";
1205 }