citadel/netconfig.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2012 by the citadel.org team
   6  *
   7  *  This program is open source software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License, version 3.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include "sysdep.h"
  18 #include <stdio.h>
  19
  20 #ifdef HAVE_SYSCALL_H
  21 # include <syscall.h>
  22 #else
  23 # if HAVE_SYS_SYSCALL_H
  24 #  include <sys/syscall.h>
  25 # endif
  26 #endif
  27 #include <dirent.h>
  28
  29 #include <libcitadel.h>
  30
  31 #include "include/ctdl_module.h"
  32
  33
  34 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg);
  35
  36 HashList *CfgTypeHash = NULL;
  37 HashList *RoomConfigs = NULL;
  38 /*-----------------------------------------------------------------------------*
  39  *                       Per room network configs                              *
  40  *-----------------------------------------------------------------------------*/
  41 void RegisterRoomCfgType(const char* Name, long len, RoomNetCfg eCfg, CfgLineParser p, int uniq,  int nSegments, CfgLineSerializer s, CfgLineDeAllocator d)
  42 {
  43         CfgLineType *pCfg;
  44
  45         pCfg = (CfgLineType*) malloc(sizeof(CfgLineType));
  46         pCfg->Parser = p;
  47         pCfg->Serializer = s;
  48         pCfg->DeAllocator = d;
  49         pCfg->C = eCfg;
  50         pCfg->Str.Key = Name;
  51         pCfg->Str.len = len;
  52         pCfg->IsSingleLine = uniq;
  53         pCfg->nSegments = nSegments;
  54         if (CfgTypeHash == NULL)
  55                 CfgTypeHash = NewHash(1, NULL);
  56         Put(CfgTypeHash, Name, len, pCfg, NULL);
  57 }
  58
  59
  60 const CfgLineType *GetCfgTypeByStr(const char *Key, long len)
  61 {
  62         void *pv;
  63
  64         if (GetHash(CfgTypeHash, Key, len, &pv) && (pv != NULL))
  65         {
  66                 return (const CfgLineType *) pv;
  67         }
  68         else
  69         {
  70                 return NULL;
  71         }
  72 }
  73
  74 const CfgLineType *GetCfgTypeByEnum(RoomNetCfg eCfg, HashPos *It)
  75 {
  76         const char *Key;
  77         long len;
  78         void *pv;
  79         CfgLineType *pCfg;
  80
  81         RewindHashPos(CfgTypeHash, It, 1);
  82         while (GetNextHashPos(CfgTypeHash, It, &len, &Key, &pv) && (pv != NULL))
  83         {
  84                 pCfg = (CfgLineType*) pv;
  85                 if (pCfg->C == eCfg)
  86                         return pCfg;
  87         }
  88         return NULL;
  89 }
  90 void ParseGeneric(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCfg)
  91 {
  92         RoomNetCfgLine *nptr;
  93         int i;
  94
  95         nptr = (RoomNetCfgLine *)
  96                 malloc(sizeof(RoomNetCfgLine));
  97         nptr->next = OneRNCfg->NetConfigs[ThisOne->C];
  98         nptr->Value = malloc(sizeof(StrBuf*) * ThisOne->nSegments);
  99         nptr->nValues = 0;
 100         memset(nptr->Value, 0, sizeof(StrBuf*) * ThisOne->nSegments);
 101         if (ThisOne->nSegments == 1)
 102         {
 103                 nptr->Value[0] = NewStrBufPlain(LinePos, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 104                 nptr->nValues = 1;
 105         }
 106         else for (i = 0; i < ThisOne->nSegments; i++)
 107         {
 108                 nptr->nValues++;
 109                 nptr->Value[i] = NewStrBufPlain(NULL, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 110                 StrBufExtract_NextToken(nptr->Value[i], Line, &LinePos, '|');
 111         }
 112
 113         OneRNCfg->NetConfigs[ThisOne->C] = nptr;
 114 }
 115
 116 void SerializeGeneric(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *OneRNCfg, RoomNetCfgLine *data)
 117 {
 118         int i;
 119
 120         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 121         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 122         for (i = 0; i < ThisOne->nSegments; i++)
 123         {
 124                 StrBufAppendBuf(OutputBuffer, data->Value[i], 0);
 125                 if (i + 1 < ThisOne->nSegments)
 126                         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 127         }
 128         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 129 }
 130
 131 void DeleteGenericCfgLine(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 132 {
 133         int i;
 134
 135         for (i = 0; i < ThisOne->nSegments; i++)
 136         {
 137                 FreeStrBuf(&(*data)->Value[i]);
 138         }
 139         free ((*data)->Value);
 140         free(*data);
 141         *data = NULL;
 142 }
 143 RoomNetCfgLine *DuplicateOneGenericCfgLine(const RoomNetCfgLine *data)
 144 {
 145         RoomNetCfgLine *NewData;
 146
 147         NewData = (RoomNetCfgLine*)malloc(sizeof(RoomNetCfgLine));
 148         int i;
 149         NewData->Value = (StrBuf **)malloc(sizeof(StrBuf*) * data->nValues);
 150
 151         for (i = 0; i < data->nValues; i++)
 152         {
 153                 NewData->Value[i] = NewStrBufDup(data->Value[i]);
 154         }
 155         return NewData;
 156 }
 157 int ReadRoomNetConfigFile(OneRoomNetCfg **pOneRNCfg, char *filename)
 158 {
 159         int fd;
 160         const char *ErrStr = NULL;
 161         const char *Pos;
 162         const CfgLineType *pCfg;
 163         StrBuf *Line;
 164         StrBuf *InStr;
 165         OneRoomNetCfg *OneRNCfg;
 166
 167         fd = open(filename, O_NONBLOCK|O_RDONLY);
 168         if (fd == -1) {
 169                 *pOneRNCfg = NULL;
 170                 return 0;
 171         }
 172         if (*pOneRNCfg != NULL)
 173                 OneRNCfg = *pOneRNCfg;
 174         else
 175                 OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 176         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 177         *pOneRNCfg = OneRNCfg;
 178         Line = NewStrBuf();
 179
 180         while (StrBufTCP_read_line(Line, &fd, 0, &ErrStr) >= 0) {
 181                 if (StrLength(Line) == 0)
 182                         continue;
 183                 Pos = NULL;
 184                 InStr = NewStrBufPlain(NULL, StrLength(Line));
 185                 StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 186
 187                 pCfg = GetCfgTypeByStr(SKEY(InStr));
 188                 if (pCfg != NULL)
 189                 {
 190                         pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 191                 }
 192                 else
 193                 {
 194                         if (OneRNCfg->misc == NULL)
 195                         {
 196                                 OneRNCfg->misc = NewStrBufDup(Line);
 197                         }
 198                         else
 199                         {
 200                                 if(StrLength(OneRNCfg->misc) > 0)
 201                                         StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 202                                 StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 203                         }
 204                 }
 205         }
 206         if (fd > 0)
 207                 close(fd);
 208         FreeStrBuf(&InStr);
 209         FreeStrBuf(&Line);
 210         return 1;
 211 }
 212
 213 int SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, char *filename)
 214 {
 215         RoomNetCfg eCfg;
 216         StrBuf *Cfg = NULL;
 217         StrBuf *OutBuffer = NULL;
 218         char tempfilename[PATH_MAX];
 219         int TmpFD;
 220         long len;
 221         time_t unixtime;
 222         struct timeval tv;
 223         long reltid; /* if we don't have SYS_gettid, use "random" value */
 224         int rc;
 225         HashPos *CfgIt;
 226
 227         len = strlen(filename);
 228         memcpy(tempfilename, filename, len + 1);
 229
 230 #if defined(HAVE_SYSCALL_H) && defined (SYS_gettid)
 231         reltid = syscall(SYS_gettid);
 232 #endif
 233         gettimeofday(&tv, NULL);
 234         /* Promote to time_t; types differ on some OSes (like darwin) */
 235         unixtime = tv.tv_sec;
 236
 237         sprintf(tempfilename + len, ".%ld-%ld", reltid, unixtime);
 238         errno = 0;
 239         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 240         Cfg = NewStrBuf();
 241         if ((TmpFD < 0) || (errno != 0)) {
 242                 syslog(LOG_CRIT, "ERROR: cannot open %s: %s\n",
 243                         filename, strerror(errno));
 244                 unlink(tempfilename);
 245                 FreeStrBuf(&Cfg);
 246                 return 0;
 247         }
 248         else {
 249                 OutBuffer = NewStrBuf();
 250                 CfgIt = GetNewHashPos(CfgTypeHash, 1);
 251                 fchown(TmpFD, config.c_ctdluid, 0);
 252                 for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 253                 {
 254                         const CfgLineType *pCfg;
 255                         pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 256                         if (pCfg->IsSingleLine)
 257                         {
 258                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 259                         }
 260                         else
 261                         {
 262                                 RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 263                                 while (pName != NULL)
 264                                 {
 265                                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 266                                         pName = pName->next;
 267                                 }
 268
 269
 270                         }
 271
 272                 }
 273                 DeleteHashPos(&CfgIt);
 274
 275
 276                 if (OneRNCfg->misc != NULL) {
 277                         StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 278                 }
 279
 280                 rc = write(TmpFD, ChrPtr(OutBuffer), StrLength(OutBuffer));
 281                 if ((rc >=0 ) && (rc == StrLength(OutBuffer)))
 282                 {
 283                         close(TmpFD);
 284                         rename(tempfilename, filename);
 285                         rc = 1;
 286                 }
 287                 else {
 288                         syslog(LOG_EMERG,
 289                                       "unable to write %s; [%s]; not enough space on the disk?\n",
 290                                       tempfilename,
 291                                       strerror(errno));
 292                         close(TmpFD);
 293                         unlink(tempfilename);
 294                         rc = 0;
 295                 }
 296                 FreeStrBuf(&OutBuffer);
 297
 298         }
 299         FreeStrBuf(&Cfg);
 300         return rc;
 301 }
 302
 303 void SaveModifiedRooms(struct ctdlroom *qrbuf, void *data, OneRoomNetCfg *OneRNCfg)
 304 {
 305         char filename[PATH_MAX];
 306
 307         if (OneRNCfg->changed)
 308         {
 309                 assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 310                 SaveRoomNetConfigFile(OneRNCfg, filename);
 311                 OneRNCfg->changed = 0;
 312         }
 313 }
 314 void SaveChangedConfigs(void)
 315 {
 316         CtdlForEachNetCfgRoom(SaveModifiedRooms,
 317                               NULL,
 318                               maxRoomNetCfg);
 319 }
 320
 321
 322 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 323 {
 324         int new = 0;
 325         RoomNetCfgLine **pLine;
 326         char filename[PATH_MAX];
 327
 328         if (OneRNCfg == NULL)
 329         {
 330                 new = 1;
 331                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 332                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 333         }
 334         pLine = &OneRNCfg->NetConfigs[LineType];
 335
 336         while(*pLine != NULL) pLine = &((*pLine)->next);
 337         *pLine = Line;
 338
 339         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 340         SaveRoomNetConfigFile(OneRNCfg, filename);
 341         OneRNCfg->changed = 0;
 342         if (new)
 343         {
 344                 Put(RoomConfigs, LKEY(qrbuf->QRnumber), OneRNCfg, vFreeRoomNetworkStruct);
 345         }
 346 }
 347
 348 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 349 {
 350         RoomNetCfg eCfg;
 351         HashPos *CfgIt;
 352
 353         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 354         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 355         {
 356                 const CfgLineType *pCfg;
 357                 RoomNetCfgLine *pNext, *pName;
 358
 359                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 360                 pName= OneRNCfg->NetConfigs[pCfg->C];
 361                 while (pName != NULL)
 362                 {
 363                         pNext = pName->next;
 364                         pCfg->DeAllocator(pCfg, &pName);
 365                         pName = pNext;
 366                 }
 367         }
 368         DeleteHashPos(&CfgIt);
 369
 370         FreeStrBuf(&OneRNCfg->Sender);
 371         FreeStrBuf(&OneRNCfg->RoomInfo);
 372         FreeStrBuf(&OneRNCfg->misc);
 373 }
 374 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 375 {
 376         OneRoomNetCfg *OneRNCfg;
 377         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 378         FreeRoomNetworkStructContent(OneRNCfg);
 379         free(OneRNCfg);
 380 }
 381 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 382 {
 383         vFreeRoomNetworkStruct(*pOneRNCfg);
 384         *pOneRNCfg=NULL;
 385 }
 386
 387 OneRoomNetCfg* CtdlGetNetCfgForRoom(long QRNumber)
 388 {
 389         void *pv;
 390         GetHash(RoomConfigs, LKEY(QRNumber), &pv);
 391         return (OneRoomNetCfg*)pv;
 392 }
 393
 394
 395 void LoadAllNetConfigs(void)
 396 {
 397         DIR *filedir = NULL;
 398         struct dirent *d;
 399         struct dirent *filedir_entry;
 400         int d_type = 0;
 401         int d_namelen;
 402         long RoomNumber;
 403         OneRoomNetCfg *OneRNCfg;
 404         int IsNumOnly;
 405         const char *pch;
 406         char path[PATH_MAX];
 407
 408         RoomConfigs = NewHash(1, NULL);
 409         filedir = opendir (ctdl_netcfg_dir);
 410         if (filedir == NULL) {
 411                 return ; /// todo: panic!
 412         }
 413
 414         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 1);
 415         if (d == NULL) {
 416                 closedir(filedir);
 417                 return ;
 418         }
 419
 420         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 421                (filedir_entry != NULL))
 422         {
 423 #ifdef _DIRENT_HAVE_D_NAMLEN
 424                 d_namelen = filedir_entry->d_namelen;
 425 #else
 426                 d_namelen = strlen(filedir_entry->d_name);
 427 #endif
 428
 429 #ifdef _DIRENT_HAVE_D_TYPE
 430                 d_type = filedir_entry->d_type;
 431 #else
 432
 433 #ifndef DT_UNKNOWN
 434 #define DT_UNKNOWN     0
 435 #define DT_DIR         4
 436 #define DT_REG         8
 437 #define DT_LNK         10
 438
 439 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 440 #define DTTOIF(dirtype)        ((dirtype) << 12)
 441 #endif
 442                 d_type = DT_UNKNOWN;
 443 #endif
 444                 if ((d_namelen > 1) && filedir_entry->d_name[d_namelen - 1] == '~')
 445                         continue; /* Ignore backup files... */
 446
 447                 if ((d_namelen == 1) &&
 448                     (filedir_entry->d_name[0] == '.'))
 449                         continue;
 450
 451                 if ((d_namelen == 2) &&
 452                     (filedir_entry->d_name[0] == '.') &&
 453                     (filedir_entry->d_name[1] == '.'))
 454                         continue;
 455
 456                 snprintf(path, PATH_MAX, "%s/%s",
 457                          ctdl_netcfg_dir, filedir_entry->d_name);
 458
 459                 if (d_type == DT_UNKNOWN) {
 460                         struct stat s;
 461                         if (lstat(path, &s) == 0) {
 462                                 d_type = IFTODT(s.st_mode);
 463                         }
 464                 }
 465
 466                 switch (d_type)
 467                 {
 468                 case DT_DIR:
 469                         break;
 470                 case DT_LNK: /* TODO: check whether its a file or a directory */
 471                 case DT_REG:
 472                         IsNumOnly = 1;
 473                         pch = filedir_entry->d_name;
 474                         while (*pch != '\0')
 475                         {
 476                                 if (!isdigit(*pch))
 477                                 {
 478                                         IsNumOnly = 0;
 479                                 }
 480                                 pch ++;
 481                         }
 482                         if (IsNumOnly)
 483                         {
 484                                 OneRNCfg = NULL;
 485                                 RoomNumber = atol(filedir_entry->d_name);
 486                                 ReadRoomNetConfigFile(&OneRNCfg, path);
 487
 488                                 if (OneRNCfg != NULL)
 489                                         Put(RoomConfigs, LKEY(RoomNumber), OneRNCfg, vFreeRoomNetworkStruct);
 490                                 /* syslog(9, "[%s | %s]\n", ChrPtr(OneWebName), ChrPtr(FileName)); */
 491                         }
 492                         break;
 493                 default:
 494                         break;
 495                 }
 496
 497
 498         }
 499         free(d);
 500         closedir(filedir);
 501 }
 502
 503
 504 /*-----------------------------------------------------------------------------*
 505  *              Per room network configs : exchange with client                *
 506  *-----------------------------------------------------------------------------*/
 507 void cmd_gnet(char *argbuf)
 508 {
 509         char filename[PATH_MAX];
 510         char buf[SIZ];
 511         FILE *fp;
 512
 513
 514         if (!IsEmptyStr(argbuf))
 515         {
 516                 if (CtdlAccessCheck(ac_aide)) return;
 517                 if (strcmp(argbuf, FILE_MAILALIAS))
 518                 {
 519                         cprintf("%d No such file or directory\n",
 520                                 ERROR + INTERNAL_ERROR);
 521                         return;
 522                 }
 523                 safestrncpy(filename, file_mail_aliases, sizeof(filename));
 524                 cprintf("%d Settings for <%s>\n",
 525                         LISTING_FOLLOWS,
 526                         filename);
 527         }
 528         else
 529         {
 530                 if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 531                         /* users can edit the netconfigs for their own mailbox rooms */
 532                 }
 533                 else if (CtdlAccessCheck(ac_room_aide)) return;
 534
 535                 assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 536                 cprintf("%d Network settings for room #%ld <%s>\n",
 537                         LISTING_FOLLOWS,
 538                         CC->room.QRnumber, CC->room.QRname);
 539         }
 540
 541         fp = fopen(filename, "r");
 542         if (fp != NULL) {
 543                 while (fgets(buf, sizeof buf, fp) != NULL) {
 544                         buf[strlen(buf)-1] = 0;
 545                         cprintf("%s\n", buf);
 546                 }
 547                 fclose(fp);
 548         }
 549
 550         cprintf("000\n");
 551 }
 552
 553 #define nForceAliases 5
 554 const ConstStr ForceAliases[nForceAliases] = {
 555         {HKEY("bbs,")},
 556         {HKEY("root,")},
 557         {HKEY("Auto,")},
 558         {HKEY("postmaster,")},
 559         {HKEY("abuse,")}
 560 };
 561
 562 void cmd_snet(char *argbuf)
 563 {
 564         struct CitContext *CCC = CC;
 565         char tempfilename[PATH_MAX];
 566         char filename[PATH_MAX];
 567         int TmpFD;
 568         StrBuf *Line;
 569         struct stat StatBuf;
 570         long len;
 571         int rc;
 572         int IsMailAlias = 0;
 573         int MailAliasesFound[nForceAliases];
 574
 575         unbuffer_output();
 576
 577         if (!IsEmptyStr(argbuf))
 578         {
 579                 if (CtdlAccessCheck(ac_aide)) return;
 580                 if (strcmp(argbuf, FILE_MAILALIAS))
 581                 {
 582                         cprintf("%d No such file or directory\n",
 583                                 ERROR + INTERNAL_ERROR);
 584                         return;
 585                 }
 586                 len = safestrncpy(filename, file_mail_aliases, sizeof(filename));
 587                 memset(MailAliasesFound, 0, sizeof(MailAliasesFound));
 588                 memcpy(tempfilename, filename, len + 1);
 589                 IsMailAlias = 1;
 590         }
 591         else
 592         {
 593                 if ( (CCC->room.QRflags & QR_MAILBOX) && (CCC->user.usernum == atol(CCC->room.QRname)) ) {
 594                         /* users can edit the netconfigs for their own mailbox rooms */
 595                 }
 596                 else if (CtdlAccessCheck(ac_room_aide)) return;
 597
 598                 len = assoc_file_name(filename, sizeof filename, &CCC->room, ctdl_netcfg_dir);
 599                 memcpy(tempfilename, filename, len + 1);
 600         }
 601         memset(&StatBuf, 0, sizeof(struct stat));
 602         if ((stat(filename, &StatBuf)  == -1) || (StatBuf.st_size == 0))
 603                 StatBuf.st_size = 80; /* Not there or empty? guess 80 chars line. */
 604
 605         sprintf(tempfilename + len, ".%d", CCC->cs_pid);
 606         errno = 0;
 607         TmpFD = open(tempfilename, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
 608
 609         if ((TmpFD > 0) && (errno == 0))
 610         {
 611                 char *tmp = malloc(StatBuf.st_size * 2);
 612                 memset(tmp, ' ', StatBuf.st_size * 2);
 613                 rc = write(TmpFD, tmp, StatBuf.st_size * 2);
 614                 free(tmp);
 615                 if ((rc <= 0) || (rc != StatBuf.st_size * 2))
 616                 {
 617                         close(TmpFD);
 618                         cprintf("%d Unable to allocate the space required for %s: %s\n",
 619                                 ERROR + INTERNAL_ERROR,
 620                                 tempfilename,
 621                                 strerror(errno));
 622                         unlink(tempfilename);
 623                         return;
 624                 }
 625                 lseek(TmpFD, SEEK_SET, 0);
 626         }
 627         else {
 628                 cprintf("%d Unable to allocate the space required for %s: %s\n",
 629                         ERROR + INTERNAL_ERROR,
 630                         tempfilename,
 631                         strerror(errno));
 632                 unlink(tempfilename);
 633                 return;
 634         }
 635         Line = NewStrBuf();
 636
 637         cprintf("%d %s\n", SEND_LISTING, tempfilename);
 638
 639         len = 0;
 640         while (rc = CtdlClientGetLine(Line),
 641                (rc >= 0))
 642         {
 643                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 644                         break;
 645                 if (IsMailAlias)
 646                 {
 647                         int i;
 648
 649                         for (i = 0; i < nForceAliases; i++)
 650                         {
 651                                 if ((!MailAliasesFound[i]) &&
 652                                     (strncmp(ForceAliases[i].Key,
 653                                              ChrPtr(Line),
 654                                              ForceAliases[i].len) == 0)
 655                                         )
 656                                     {
 657                                             MailAliasesFound[i] = 1;
 658                                             break;
 659                                     }
 660                         }
 661                 }
 662
 663                 StrBufAppendBufPlain(Line, HKEY("\n"), 0);
 664                 write(TmpFD, ChrPtr(Line), StrLength(Line));
 665                 len += StrLength(Line);
 666         }
 667         FreeStrBuf(&Line);
 668         ftruncate(TmpFD, len);
 669         close(TmpFD);
 670
 671         if (IsMailAlias)
 672         {
 673                 int i, state;
 674                 /*
 675                  * Sanity check whether all aliases required by the RFCs were set
 676                  * else bail out.
 677                  */
 678                 state = 1;
 679                 for (i = 0; i < nForceAliases; i++)
 680                 {
 681                         if (!MailAliasesFound[i])
 682                                 state = 0;
 683                 }
 684                 if (state == 0)
 685                 {
 686                         cprintf("%d won't do this - you're missing an RFC required alias.\n",
 687                                 ERROR + INTERNAL_ERROR);
 688                         unlink(tempfilename);
 689                         return;
 690                 }
 691         }
 692
 693         /* Now copy the temp file to its permanent location.
 694          * (We copy instead of link because they may be on different filesystems)
 695          */
 696         begin_critical_section(S_NETCONFIGS);
 697         rename(tempfilename, filename);
 698         if (!IsMailAlias)
 699         {
 700                 OneRoomNetCfg *RNCfg;
 701                 RNCfg = CtdlGetNetCfgForRoom(CCC->room.QRnumber);
 702                 if (RNCfg != NULL)
 703                 {
 704                         FreeRoomNetworkStructContent(RNCfg);
 705                         ReadRoomNetConfigFile(&RNCfg, filename);
 706                 }
 707                 else
 708                 {
 709                         ReadRoomNetConfigFile(&RNCfg, filename);
 710                         Put(RoomConfigs, LKEY(CCC->room.QRnumber), RNCfg, vFreeRoomNetworkStruct);
 711                 }
 712         }
 713         end_critical_section(S_NETCONFIGS);
 714 }
 715
 716
 717 /*-----------------------------------------------------------------------------*
 718  *                       Per node network configs                              *
 719  *-----------------------------------------------------------------------------*/
 720 void DeleteCtdlNodeConf(void *vNode)
 721 {
 722         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 723         FreeStrBuf(&Node->NodeName);
 724         FreeStrBuf(&Node->Secret);
 725         FreeStrBuf(&Node->Host);
 726         FreeStrBuf(&Node->Port);
 727         free(Node);
 728 }
 729
 730 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 731 {
 732         const char *Pos = NULL;
 733         CtdlNodeConf *Node;
 734
 735         /* we need at least 4 pipes and some other text so its invalid. */
 736         if (StrLength(SerializedNode) < 8)
 737                 return NULL;
 738         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 739
 740         Node->DeleteMe = 0;
 741
 742         Node->NodeName=NewStrBuf();
 743         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 744
 745         Node->Secret=NewStrBuf();
 746         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 747
 748         Node->Host=NewStrBuf();
 749         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 750
 751         Node->Port=NewStrBuf();
 752         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 753         return Node;
 754 }
 755
 756
 757 /*
 758  * Load or refresh the Citadel network (IGnet) configuration for this node.
 759  */
 760 HashList* CtdlLoadIgNetCfg(void)
 761 {
 762         const char *LinePos;
 763         char       *Cfg;
 764         StrBuf     *Buf;
 765         StrBuf     *LineBuf;
 766         HashList   *Hash;
 767         CtdlNodeConf   *Node;
 768
 769         Cfg =  CtdlGetSysConfig(IGNETCFG);
 770         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 771                 if (Cfg != NULL)
 772                         free(Cfg);
 773                 return NULL;
 774         }
 775
 776         Hash = NewHash(1, NULL);
 777         Buf = NewStrBufPlain(Cfg, -1);
 778         free(Cfg);
 779         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 780         LinePos = NULL;
 781         do
 782         {
 783                 StrBufSipLine(LineBuf, Buf, &LinePos);
 784                 if (StrLength(LineBuf) != 0) {
 785                         Node = NewNode(LineBuf);
 786                         if (Node != NULL) {
 787                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 788                         }
 789                 }
 790         } while (LinePos != StrBufNOTNULL);
 791         FreeStrBuf(&Buf);
 792         FreeStrBuf(&LineBuf);
 793         return Hash;
 794 }
 795
 796
 797 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 798 {
 799         const RoomNetCfg RecipientCfgs[] = {
 800                 listrecp,
 801                 digestrecp,
 802                 participate,
 803                 maxRoomNetCfg
 804         };
 805         int i;
 806         RoomNetCfgLine *nptr;
 807         size_t len;
 808
 809         len = strlen(Name);
 810         i = 0;
 811         while (RecipientCfgs[i] != maxRoomNetCfg)
 812         {
 813                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 814
 815                 while (nptr != NULL)
 816                 {
 817                         if ((StrLength(nptr->Value[0]) == len) &&
 818                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 819                         {
 820                                 return 1;
 821                         }
 822                         nptr = nptr->next;
 823                 }
 824         }
 825         return 0;
 826 }
 827
 828
 829
 830 int CtdlNetconfigCheckRoomaccess(
 831         char *errmsgbuf,
 832         size_t n,
 833         const char* RemoteIdentifier)
 834 {
 835         OneRoomNetCfg *RNCfg;
 836         char filename[SIZ];
 837         int found;
 838
 839         if (RemoteIdentifier == NULL)
 840         {
 841                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 842                 return (ERROR + USERNAME_REQUIRED);
 843         }
 844
 845         assoc_file_name(filename, sizeof filename, &CC->room, ctdl_netcfg_dir);
 846         begin_critical_section(S_NETCONFIGS);
 847         if (!ReadRoomNetConfigFile(&RNCfg, filename))
 848         {
 849                 end_critical_section(S_NETCONFIGS);
 850                 snprintf(errmsgbuf, n,
 851                          "This mailing list only accepts posts from subscribers.");
 852                 return (ERROR + NO_SUCH_USER);
 853         }
 854         end_critical_section(S_NETCONFIGS);
 855         found = is_recipient (RNCfg, RemoteIdentifier);
 856         vFreeRoomNetworkStruct(&RNCfg);
 857         if (found) {
 858                 return (0);
 859         }
 860         else {
 861                 snprintf(errmsgbuf, n,
 862                          "This mailing list only accepts posts from subscribers.");
 863                 return (ERROR + NO_SUCH_USER);
 864         }
 865 }
 866
 867
 868
 869 /*
 870  * cmd_netp() - authenticate to the server as another Citadel node polling
 871  *            for network traffic
 872  */
 873 void cmd_netp(char *cmdbuf)
 874 {
 875         struct CitContext *CCC = CC;
 876         HashList *working_ignetcfg;
 877         char *node;
 878         StrBuf *NodeStr;
 879         long nodelen;
 880         int v;
 881         long lens[2];
 882         const char *strs[2];
 883
 884         const StrBuf *secret = NULL;
 885         const StrBuf *nexthop = NULL;
 886         char err_buf[SIZ] = "";
 887
 888         /* Authenticate */
 889         node = CCC->curr_user;
 890         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 891         NodeStr = NewStrBufPlain(node, nodelen);
 892         /* load the IGnet Configuration to check node validity */
 893         working_ignetcfg = CtdlLoadIgNetCfg();
 894         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 895         if (v != 0) {
 896                 snprintf(err_buf, sizeof err_buf,
 897                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 898                         node, CCC->cs_host, CCC->cs_addr
 899                 );
 900                 syslog(LOG_WARNING, "%s", err_buf);
 901                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 902
 903                 strs[0] = CCC->cs_addr;
 904                 lens[0] = strlen(CCC->cs_addr);
 905
 906                 strs[1] = "SRV_UNKNOWN";
 907                 lens[1] = sizeof("SRV_UNKNOWN" - 1);
 908
 909                 CtdlAideFPMessage(
 910                         err_buf,
 911                         "IGNet Networking.",
 912                         2, strs, (long*) &lens);
 913
 914                 DeleteHash(&working_ignetcfg);
 915                 FreeStrBuf(&NodeStr);
 916                 return;
 917         }
 918
 919         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 920         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 921                 snprintf(err_buf, sizeof err_buf,
 922                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 923                         CCC->cs_host, CCC->cs_addr, node
 924                 );
 925                 syslog(LOG_WARNING, "%s", err_buf);
 926                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 927
 928                 strs[0] = CCC->cs_addr;
 929                 lens[0] = strlen(CCC->cs_addr);
 930
 931                 strs[1] = "SRV_PW";
 932                 lens[1] = sizeof("SRV_PW" - 1);
 933
 934                 CtdlAideFPMessage(
 935                         err_buf,
 936                         "IGNet Networking.",
 937                         2, strs, (long*) &lens);
 938
 939                 DeleteHash(&working_ignetcfg);
 940                 FreeStrBuf(&NodeStr);
 941                 return;
 942         }
 943
 944         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 945                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 946                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 947                 DeleteHash(&working_ignetcfg);
 948                 FreeStrBuf(&NodeStr);
 949                 return;
 950         }
 951         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 952         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 953         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]\n",
 954                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 955         );
 956         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 957         DeleteHash(&working_ignetcfg);
 958         FreeStrBuf(&NodeStr);
 959 }
 960
 961
 962 /*-----------------------------------------------------------------------------*
 963  *                 Network maps: evaluate other nodes                          *
 964  *-----------------------------------------------------------------------------*/
 965
 966 void DeleteNetMap(void *vNetMap)
 967 {
 968         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 969         FreeStrBuf(&TheNetMap->NodeName);
 970         FreeStrBuf(&TheNetMap->NextHop);
 971         free(TheNetMap);
 972 }
 973
 974 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
 975 {
 976         const char *Pos = NULL;
 977         CtdlNetMap *NM;
 978
 979         /* we need at least 3 pipes and some other text so its invalid. */
 980         if (StrLength(SerializedNetMap) < 6)
 981                 return NULL;
 982         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
 983
 984         NM->NodeName=NewStrBuf();
 985         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
 986
 987         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
 988
 989         NM->NextHop=NewStrBuf();
 990         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
 991
 992         return NM;
 993 }
 994
 995 HashList* CtdlReadNetworkMap(void)
 996 {
 997         const char *LinePos;
 998         char       *Cfg;
 999         StrBuf     *Buf;
1000         StrBuf     *LineBuf;
1001         HashList   *Hash;
1002         CtdlNetMap     *TheNetMap;
1003
1004         Hash = NewHash(1, NULL);
1005         Cfg =  CtdlGetSysConfig(IGNETMAP);
1006         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
1007                 if (Cfg != NULL)
1008                         free(Cfg);
1009                 return Hash;
1010         }
1011
1012         Buf = NewStrBufPlain(Cfg, -1);
1013         free(Cfg);
1014         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
1015         LinePos = NULL;
1016         while (StrBufSipLine(Buf, LineBuf, &LinePos))
1017         {
1018                 TheNetMap = NewNetMap(LineBuf);
1019                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
1020                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
1021                 }
1022         }
1023         FreeStrBuf(&Buf);
1024         FreeStrBuf(&LineBuf);
1025         return Hash;
1026 }
1027
1028 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
1029 {
1030         void *vMap;
1031         const char *key;
1032         long len;
1033         StrBuf *Ret = NewStrBuf();
1034         HashPos *Pos = GetNewHashPos(Map, 0);
1035
1036         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
1037         {
1038                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
1039                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
1040                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1041
1042                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
1043                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
1044
1045                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
1046                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
1047         }
1048         DeleteHashPos(&Pos);
1049         return Ret;
1050 }
1051
1052
1053 /*
1054  * Learn topology from path fields
1055  */
1056 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
1057 {
1058         CtdlNetMap *pNM = NULL;
1059         void *vptr;
1060         char nexthop[256];
1061         CtdlNetMap *nmptr;
1062
1063         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
1064             (vptr != NULL))/* TODO: is the NodeName Uniq? */
1065         {
1066                 pNM = (CtdlNetMap*)vptr;
1067                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
1068                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
1069                         pNM->lastcontact = time(NULL);
1070                         (*netmap_changed) ++;
1071                         return;
1072                 }
1073         }
1074
1075         /* If we got here then it's not in the map, so add it. */
1076         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
1077         nmptr->NodeName = NewStrBufPlain(node, -1);
1078         nmptr->lastcontact = time(NULL);
1079         nmptr->NextHop = NewStrBuf ();
1080         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
1081         /* TODO: is the NodeName Uniq? */
1082         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
1083         (*netmap_changed) ++;
1084 }
1085
1086
1087 /*
1088  * Check the network map and determine whether the supplied node name is
1089  * valid.  If it is not a neighbor node, supply the name of a neighbor node
1090  * which is the next hop.  If it *is* a neighbor node, we also fill in the
1091  * shared secret.
1092  */
1093 int CtdlIsValidNode(const StrBuf **nexthop,
1094                     const StrBuf **secret,
1095                     StrBuf *node,
1096                     HashList *IgnetCfg,
1097                     HashList *the_netmap)
1098 {
1099         void *vNetMap;
1100         void *vNodeConf;
1101         CtdlNodeConf *TheNode;
1102         CtdlNetMap *TheNetMap;
1103
1104         if (StrLength(node) == 0) {
1105                 return(-1);
1106         }
1107
1108         /*
1109          * First try the neighbor nodes
1110          */
1111         if (GetCount(IgnetCfg) == 0) {
1112                 syslog(LOG_INFO, "IgnetCfg is empty!\n");
1113                 if (nexthop != NULL) {
1114                         *nexthop = NULL;
1115                 }
1116                 return(-1);
1117         }
1118
1119         /* try to find a neigbour with the name 'node' */
1120         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
1121             (vNodeConf != NULL))
1122         {
1123                 TheNode = (CtdlNodeConf*)vNodeConf;
1124                 if (secret != NULL)
1125                         *secret = TheNode->Secret;
1126                 return 0;               /* yup, it's a direct neighbor */
1127         }
1128
1129         /*
1130          * If we get to this point we have to see if we know the next hop
1131          *//* TODO: is the NodeName Uniq? */
1132         if ((GetCount(the_netmap) > 0) &&
1133             (GetHash(the_netmap, SKEY(node), &vNetMap)))
1134         {
1135                 TheNetMap = (CtdlNetMap*)vNetMap;
1136                 if (nexthop != NULL)
1137                         *nexthop = TheNetMap->NextHop;
1138                 return(0);
1139         }
1140
1141         /*
1142          * If we get to this point, the supplied node name is bogus.
1143          */
1144         syslog(LOG_ERR, "Invalid node name <%s>\n", ChrPtr(node));
1145         return(-1);
1146 }
1147
1148
1149 void destroy_network_cfgs(void)
1150 {
1151         HashList *pCfgTypeHash = CfgTypeHash;
1152         HashList *pRoomConfigs = RoomConfigs;
1153
1154         CfgTypeHash = NULL;
1155         RoomConfigs = NULL;
1156
1157         DeleteHash(&pCfgTypeHash);
1158         DeleteHash(&pRoomConfigs);
1159 }
1160
1161 /*
1162  * Module entry point
1163  */
1164 CTDL_MODULE_INIT(netconfig)
1165 {
1166         if (!threading)
1167         {
1168                 CtdlRegisterCleanupHook(destroy_network_cfgs);
1169                 LoadAllNetConfigs ();
1170                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
1171                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
1172                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
1173         }
1174         return "netconfig";
1175 }