citadel/netconfig.c

   1 /*
   2  * This module handles shared rooms, inter-Citadel mail, and outbound
   3  * mailing list processing.
   4  *
   5  * Copyright (c) 2000-2016 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 #include <sys/types.h>
  20 #include <dirent.h>
  21
  22 #ifdef HAVE_SYSCALL_H
  23 # include <syscall.h>
  24 #else
  25 # if HAVE_SYS_SYSCALL_H
  26 #  include <sys/syscall.h>
  27 # endif
  28 #endif
  29 #include <dirent.h>
  30
  31 #include <libcitadel.h>
  32
  33 #include "include/ctdl_module.h"
  34 #include "serv_extensions.h"
  35 #include "config.h"
  36
  37 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg);
  38 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg);
  39
  40 HashList *CfgTypeHash = NULL;
  41
  42 /*-----------------------------------------------------------------------------*
  43  *                       Per room network configs                              *
  44  *-----------------------------------------------------------------------------*/
  45
  46
  47 void RegisterRoomCfgType(const char* Name, long len, RoomNetCfg eCfg, CfgLineParser p, int uniq,  int nSegments, CfgLineSerializer s, CfgLineDeAllocator d)
  48 {
  49         CfgLineType *pCfg;
  50
  51         pCfg = (CfgLineType*) malloc(sizeof(CfgLineType));
  52         pCfg->Parser = p;
  53         pCfg->Serializer = s;
  54         pCfg->DeAllocator = d;
  55         pCfg->C = eCfg;
  56         pCfg->Str.Key = Name;
  57         pCfg->Str.len = len;
  58         pCfg->IsSingleLine = uniq;
  59         pCfg->nSegments = nSegments;
  60         if (CfgTypeHash == NULL)
  61                 CfgTypeHash = NewHash(1, NULL);
  62         Put(CfgTypeHash, Name, len, pCfg, NULL);
  63 }
  64
  65
  66 const CfgLineType *GetCfgTypeByStr(const char *Key, long len)
  67 {
  68         void *pv;
  69
  70         if (GetHash(CfgTypeHash, Key, len, &pv) && (pv != NULL))
  71         {
  72                 return (const CfgLineType *) pv;
  73         }
  74         else
  75         {
  76                 return NULL;
  77         }
  78 }
  79
  80 const CfgLineType *GetCfgTypeByEnum(RoomNetCfg eCfg, HashPos *It)
  81 {
  82         const char *Key;
  83         long len;
  84         void *pv;
  85         CfgLineType *pCfg;
  86
  87         RewindHashPos(CfgTypeHash, It, 1);
  88         while (GetNextHashPos(CfgTypeHash, It, &len, &Key, &pv) && (pv != NULL))
  89         {
  90                 pCfg = (CfgLineType*) pv;
  91                 if (pCfg->C == eCfg)
  92                         return pCfg;
  93         }
  94         return NULL;
  95 }
  96
  97 void ParseGeneric(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCfg)
  98 {
  99         RoomNetCfgLine *nptr;
 100         int i;
 101
 102         nptr = (RoomNetCfgLine *)
 103                 malloc(sizeof(RoomNetCfgLine));
 104         nptr->next = OneRNCfg->NetConfigs[ThisOne->C];
 105         nptr->Value = malloc(sizeof(StrBuf*) * ThisOne->nSegments);
 106         nptr->nValues = 0;
 107         memset(nptr->Value, 0, sizeof(StrBuf*) * ThisOne->nSegments);
 108         if (ThisOne->nSegments == 1)
 109         {
 110                 nptr->Value[0] = NewStrBufPlain(LinePos, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 111                 nptr->nValues = 1;
 112         }
 113         else for (i = 0; i < ThisOne->nSegments; i++)
 114         {
 115                 nptr->nValues++;
 116                 nptr->Value[i] = NewStrBufPlain(NULL, StrLength(Line) - ( LinePos - ChrPtr(Line)) );
 117                 StrBufExtract_NextToken(nptr->Value[i], Line, &LinePos, '|');
 118         }
 119
 120         OneRNCfg->NetConfigs[ThisOne->C] = nptr;
 121 }
 122
 123 void SerializeGeneric(const CfgLineType *ThisOne, StrBuf *OutputBuffer, OneRoomNetCfg *OneRNCfg, RoomNetCfgLine *data)
 124 {
 125         int i;
 126
 127         StrBufAppendBufPlain(OutputBuffer, CKEY(ThisOne->Str), 0);
 128         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 129         for (i = 0; i < ThisOne->nSegments; i++)
 130         {
 131                 StrBufAppendBuf(OutputBuffer, data->Value[i], 0);
 132                 if (i + 1 < ThisOne->nSegments)
 133                         StrBufAppendBufPlain(OutputBuffer, HKEY("|"), 0);
 134         }
 135         StrBufAppendBufPlain(OutputBuffer, HKEY("\n"), 0);
 136 }
 137
 138 void DeleteGenericCfgLine(const CfgLineType *ThisOne, RoomNetCfgLine **data)
 139 {
 140         int i;
 141
 142         if (*data == NULL)
 143                 return;
 144
 145         for (i = 0; i < (*data)->nValues; i++)
 146         {
 147                 FreeStrBuf(&(*data)->Value[i]);
 148         }
 149         free ((*data)->Value);
 150         free(*data);
 151         *data = NULL;
 152 }
 153
 154 RoomNetCfgLine *DuplicateOneGenericCfgLine(const RoomNetCfgLine *data)
 155 {
 156         int i;
 157         RoomNetCfgLine *NewData;
 158
 159         NewData = (RoomNetCfgLine*)malloc(sizeof(RoomNetCfgLine));
 160         memset(NewData, 0, sizeof(RoomNetCfgLine));
 161         NewData->Value = (StrBuf **)malloc(sizeof(StrBuf*) * data->nValues);
 162         memset(NewData->Value, 0, sizeof(StrBuf*) * data->nValues);
 163
 164         for (i = 0; i < data->nValues; i++)
 165         {
 166                 NewData->Value[i] = NewStrBufDup(data->Value[i]);
 167         }
 168         NewData->nValues = data->nValues;
 169         return NewData;
 170 }
 171
 172
 173 /*
 174  * Create a config key for a room's netconfig entry
 175  */
 176 void netcfg_keyname(char *keybuf, long roomnum)
 177 {
 178         if (!keybuf) return;
 179         sprintf(keybuf, "c_netconfig_%010ld", roomnum);
 180 }
 181
 182
 183
 184 /*
 185  * Given a room number and a textual netconfig, convert to base64 and write to the configdb
 186  */
 187 void write_netconfig_to_configdb(long roomnum, const char *raw_netconfig)
 188 {
 189         char keyname[25];
 190         char *enc;
 191         int enc_len;
 192         int len;
 193
 194         syslog(LOG_DEBUG, "\033[32m--- START WRITE ---\033[0m\n\033[31m%s\033[0m\n\033[32m---- END WRITE ----\033[0m", raw_netconfig);
 195         len = strlen(raw_netconfig);
 196         netcfg_keyname(keyname, roomnum);
 197         enc = malloc(len * 2);
 198
 199         if (enc) {
 200                 enc_len = CtdlEncodeBase64(enc, raw_netconfig, len, 0);
 201                 if ((enc_len > 1) && (enc[enc_len-2] == 13)) enc[enc_len-2] = 0;
 202                 if ((enc_len > 0) && (enc[enc_len-1] == 10)) enc[enc_len-1] = 0;
 203                 enc[enc_len] = 0;
 204                 syslog(LOG_DEBUG, "Writing key '%s' (length=%d)", keyname, enc_len);
 205                 CtdlSetConfigStr(keyname, enc);
 206                 free(enc);
 207         }
 208 }
 209
 210
 211
 212 /*
 213  * Given a room number, attempt to load the netconfig configdb entry for that room.
 214  * If it returns NULL, there is no netconfig.
 215  * Otherwise the caller owns the returned memory and is responsible for freeing it.
 216  */
 217 char *LoadRoomNetConfigFile(long roomnum)
 218 {
 219         char keyname[25];
 220         char *encoded_netconfig = NULL;
 221         char *decoded_netconfig = NULL;
 222
 223         netcfg_keyname(keyname, roomnum);
 224         encoded_netconfig = CtdlGetConfigStr(keyname);
 225         if (!encoded_netconfig) return NULL;
 226
 227         decoded_netconfig = malloc(strlen(encoded_netconfig));  // yeah, way bigger than it needs to be, but safe
 228         CtdlDecodeBase64(decoded_netconfig, encoded_netconfig, strlen(encoded_netconfig));
 229         return decoded_netconfig;
 230 }
 231
 232
 233 /*
 234  * Deserialize a netconfig , allocate and return structured data
 235  */
 236 OneRoomNetCfg *ParseRoomNetConfigFile(char *serialized_data)
 237 {
 238         const char *Pos = NULL;
 239         const char *CPos = NULL;
 240         const CfgLineType *pCfg = NULL;
 241         StrBuf *Line = NULL;
 242         StrBuf *InStr = NULL;
 243         StrBuf *Cfg = NULL;
 244         OneRoomNetCfg *OneRNCfg = NULL;
 245
 246         OneRNCfg = malloc(sizeof(OneRoomNetCfg));
 247         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 248
 249         Line = NewStrBuf();
 250         InStr = NewStrBuf();
 251         Cfg = NewStrBufPlain(serialized_data, -1);
 252
 253         syslog(LOG_DEBUG, "\033[32m--- START READ ---\033[0m");
 254         while (StrBufSipLine(Line, Cfg, &CPos)) {
 255                 syslog(LOG_DEBUG, "READ NET CONFIG LINE: '\033[31m%s\033[0m'", ChrPtr(Line));
 256
 257                 if (StrLength(Line) > 0) {
 258                         Pos = NULL;
 259                         StrBufExtract_NextToken(InStr, Line, &Pos, '|');
 260
 261                         pCfg = GetCfgTypeByStr(SKEY(InStr));
 262                         if (pCfg != NULL)
 263                         {
 264                                 pCfg->Parser(pCfg, Line, Pos, OneRNCfg);
 265                         }
 266                         else
 267                         {
 268                                 if (OneRNCfg->misc == NULL)
 269                                 {
 270                                         OneRNCfg->misc = NewStrBufDup(Line);
 271                                 }
 272                                 else
 273                                 {
 274                                         if (StrLength(OneRNCfg->misc) > 0) {
 275                                                 StrBufAppendBufPlain(OneRNCfg->misc, HKEY("\n"), 0);
 276                                         }
 277                                         StrBufAppendBuf(OneRNCfg->misc, Line, 0);
 278                                 }
 279                         }
 280                 }
 281         }
 282         syslog(LOG_DEBUG, "\033[32m---- END READ ----\033[0m");
 283         FreeStrBuf(&InStr);
 284         FreeStrBuf(&Line);
 285         FreeStrBuf(&Cfg);
 286         return OneRNCfg;
 287 }
 288
 289
 290 void SaveRoomNetConfigFile(OneRoomNetCfg *OneRNCfg, long roomnum)
 291 {
 292         RoomNetCfg eCfg;
 293         StrBuf *Cfg = NULL;
 294         StrBuf *OutBuffer = NULL;
 295         HashPos *CfgIt;
 296
 297         Cfg = NewStrBuf();
 298         OutBuffer = NewStrBuf();
 299         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 300         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 301         {
 302                 const CfgLineType *pCfg;
 303                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 304                 if (pCfg->IsSingleLine)
 305                 {
 306                         pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, NULL);
 307                 }
 308                 else
 309                 {
 310                         RoomNetCfgLine *pName = OneRNCfg->NetConfigs[pCfg->C];
 311                         while (pName != NULL)
 312                         {
 313                                 pCfg->Serializer(pCfg, OutBuffer, OneRNCfg, pName);
 314                                 pName = pName->next;
 315                         }
 316
 317
 318                 }
 319
 320         }
 321         DeleteHashPos(&CfgIt);
 322
 323         if (OneRNCfg->misc != NULL) {
 324                 StrBufAppendBuf(OutBuffer, OneRNCfg->misc, 0);
 325         }
 326
 327         write_netconfig_to_configdb(roomnum, ChrPtr(OutBuffer));
 328
 329         FreeStrBuf(&OutBuffer);
 330         FreeStrBuf(&Cfg);
 331 }
 332
 333
 334
 335 void AddRoomCfgLine(OneRoomNetCfg *OneRNCfg, struct ctdlroom *qrbuf, RoomNetCfg LineType, RoomNetCfgLine *Line)
 336 {
 337         RoomNetCfgLine **pLine;
 338
 339         if (OneRNCfg == NULL)
 340         {
 341                 OneRNCfg = (OneRoomNetCfg*) malloc(sizeof(OneRoomNetCfg));
 342                 memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 343         }
 344         pLine = &OneRNCfg->NetConfigs[LineType];
 345
 346         while(*pLine != NULL) pLine = &((*pLine)->next);
 347         *pLine = Line;
 348 }
 349
 350
 351 void FreeRoomNetworkStructContent(OneRoomNetCfg *OneRNCfg)
 352 {
 353         RoomNetCfg eCfg;
 354         HashPos *CfgIt;
 355
 356         CfgIt = GetNewHashPos(CfgTypeHash, 1);
 357         for (eCfg = subpending; eCfg < maxRoomNetCfg; eCfg ++)
 358         {
 359                 const CfgLineType *pCfg;
 360                 RoomNetCfgLine *pNext, *pName;
 361
 362                 pCfg = GetCfgTypeByEnum(eCfg, CfgIt);
 363                 pName= OneRNCfg->NetConfigs[eCfg];
 364                 while (pName != NULL)
 365                 {
 366                         pNext = pName->next;
 367                         if (pCfg != NULL)
 368                         {
 369                                 pCfg->DeAllocator(pCfg, &pName);
 370                         }
 371                         else
 372                         {
 373                                 DeleteGenericCfgLine(NULL, &pName);
 374                         }
 375                         pName = pNext;
 376                 }
 377         }
 378         DeleteHashPos(&CfgIt);
 379
 380         FreeStrBuf(&OneRNCfg->Sender);
 381         FreeStrBuf(&OneRNCfg->RoomInfo);
 382         FreeStrBuf(&OneRNCfg->misc);
 383         memset(OneRNCfg, 0, sizeof(OneRoomNetCfg));
 384 }
 385
 386
 387 void vFreeRoomNetworkStruct(void *vOneRoomNetCfg)
 388 {
 389         OneRoomNetCfg *OneRNCfg;
 390         OneRNCfg = (OneRoomNetCfg*)vOneRoomNetCfg;
 391         FreeRoomNetworkStructContent(OneRNCfg);
 392         free(OneRNCfg);
 393 }
 394
 395
 396 void FreeRoomNetworkStruct(OneRoomNetCfg **pOneRNCfg)
 397 {
 398         vFreeRoomNetworkStruct(*pOneRNCfg);
 399         *pOneRNCfg=NULL;
 400 }
 401
 402
 403 /*
 404  * Fetch the netconfig entry for a room, parse it, and return the data.
 405  * Caller owns the returned memory and MUST free it using FreeRoomNetworkStruct()
 406  */
 407 OneRoomNetCfg *CtdlGetNetCfgForRoom(long roomnum)
 408 {
 409         OneRoomNetCfg *OneRNCfg = NULL;
 410         char *serialized_config = NULL;
 411
 412         serialized_config = LoadRoomNetConfigFile(roomnum);
 413         if (!serialized_config) return NULL;
 414
 415         OneRNCfg = ParseRoomNetConfigFile(serialized_config);
 416         free(serialized_config);
 417         return OneRNCfg;
 418 }
 419
 420
 421 /*-----------------------------------------------------------------------------*
 422  *              Per room network configs : exchange with client                *
 423  *-----------------------------------------------------------------------------*/
 424
 425 void cmd_gnet(char *argbuf)
 426 {
 427         if ( (CC->room.QRflags & QR_MAILBOX) && (CC->user.usernum == atol(CC->room.QRname)) ) {
 428                 /* users can edit the netconfigs for their own mailbox rooms */
 429         }
 430         else if (CtdlAccessCheck(ac_room_aide)) return;
 431
 432         cprintf("%d Network settings for room #%ld <%s>\n", LISTING_FOLLOWS, CC->room.QRnumber, CC->room.QRname);
 433
 434         char *c = LoadRoomNetConfigFile(CC->room.QRnumber);
 435         if (c) {
 436                 cprintf("%s\n", c);
 437                 free(c);
 438         }
 439         cprintf("000\n");
 440 }
 441
 442
 443 void cmd_snet(char *argbuf)
 444 {
 445         struct CitContext *CCC = CC;
 446         StrBuf *Line = NULL;
 447         StrBuf *TheConfig = NULL;
 448         int rc;
 449
 450         unbuffer_output();
 451         Line = NewStrBuf();
 452         TheConfig = NewStrBuf();
 453         cprintf("%d send new netconfig now\n", SEND_LISTING);
 454
 455         while (rc = CtdlClientGetLine(Line), (rc >= 0))
 456         {
 457                 if ((rc == 3) && (strcmp(ChrPtr(Line), "000") == 0))
 458                         break;
 459
 460                 StrBufAppendBuf(TheConfig, Line, 0);
 461                 StrBufAppendBufPlain(TheConfig, HKEY("\n"), 0);
 462         }
 463         FreeStrBuf(&Line);
 464
 465         write_netconfig_to_configdb(CCC->room.QRnumber, ChrPtr(TheConfig));
 466         FreeStrBuf(&TheConfig);
 467 }
 468
 469
 470 /*-----------------------------------------------------------------------------*
 471  *                       Per node network configs                              *
 472  *-----------------------------------------------------------------------------*/
 473 void DeleteCtdlNodeConf(void *vNode)
 474 {
 475         CtdlNodeConf *Node = (CtdlNodeConf*) vNode;
 476         FreeStrBuf(&Node->NodeName);
 477         FreeStrBuf(&Node->Secret);
 478         FreeStrBuf(&Node->Host);
 479         FreeStrBuf(&Node->Port);
 480         free(Node);
 481 }
 482
 483 CtdlNodeConf *NewNode(StrBuf *SerializedNode)
 484 {
 485         const char *Pos = NULL;
 486         CtdlNodeConf *Node;
 487
 488         /* we need at least 4 pipes and some other text so its invalid. */
 489         if (StrLength(SerializedNode) < 8)
 490                 return NULL;
 491         Node = (CtdlNodeConf *) malloc(sizeof(CtdlNodeConf));
 492
 493         Node->DeleteMe = 0;
 494
 495         Node->NodeName=NewStrBuf();
 496         StrBufExtract_NextToken(Node->NodeName, SerializedNode, &Pos, '|');
 497
 498         Node->Secret=NewStrBuf();
 499         StrBufExtract_NextToken(Node->Secret, SerializedNode, &Pos, '|');
 500
 501         Node->Host=NewStrBuf();
 502         StrBufExtract_NextToken(Node->Host, SerializedNode, &Pos, '|');
 503
 504         Node->Port=NewStrBuf();
 505         StrBufExtract_NextToken(Node->Port, SerializedNode, &Pos, '|');
 506         return Node;
 507 }
 508
 509
 510 /*
 511  * Load or refresh the Citadel network (IGnet) configuration for this node.
 512  */
 513 HashList* CtdlLoadIgNetCfg(void)
 514 {
 515         const char *LinePos;
 516         char       *Cfg;
 517         StrBuf     *Buf;
 518         StrBuf     *LineBuf;
 519         HashList   *Hash;
 520         CtdlNodeConf   *Node;
 521
 522         Cfg =  CtdlGetSysConfig(IGNETCFG);
 523         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 524                 if (Cfg != NULL)
 525                         free(Cfg);
 526                 return NULL;
 527         }
 528
 529         Hash = NewHash(1, NULL);
 530         Buf = NewStrBufPlain(Cfg, -1);
 531         free(Cfg);
 532         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 533         LinePos = NULL;
 534         do
 535         {
 536                 StrBufSipLine(LineBuf, Buf, &LinePos);
 537                 if (StrLength(LineBuf) != 0) {
 538                         Node = NewNode(LineBuf);
 539                         if (Node != NULL) {
 540                                 Put(Hash, SKEY(Node->NodeName), Node, DeleteCtdlNodeConf);
 541                         }
 542                 }
 543         } while (LinePos != StrBufNOTNULL);
 544         FreeStrBuf(&Buf);
 545         FreeStrBuf(&LineBuf);
 546         return Hash;
 547 }
 548
 549
 550 int is_recipient(OneRoomNetCfg *RNCfg, const char *Name)
 551 {
 552         const RoomNetCfg RecipientCfgs[] = {
 553                 listrecp,
 554                 digestrecp,
 555                 participate,
 556                 maxRoomNetCfg
 557         };
 558         int i;
 559         RoomNetCfgLine *nptr;
 560         size_t len;
 561
 562         len = strlen(Name);
 563         i = 0;
 564         while (RecipientCfgs[i] != maxRoomNetCfg)
 565         {
 566                 nptr = RNCfg->NetConfigs[RecipientCfgs[i]];
 567
 568                 while (nptr != NULL)
 569                 {
 570                         if ((StrLength(nptr->Value[0]) == len) &&
 571                             (!strcmp(Name, ChrPtr(nptr->Value[0]))))
 572                         {
 573                                 return 1;
 574                         }
 575                         nptr = nptr->next;
 576                 }
 577                 i++;
 578         }
 579         return 0;
 580 }
 581
 582
 583
 584 int CtdlNetconfigCheckRoomaccess(
 585         char *errmsgbuf,
 586         size_t n,
 587         const char* RemoteIdentifier)
 588 {
 589         OneRoomNetCfg *RNCfg;
 590         int found;
 591
 592         if (RemoteIdentifier == NULL)
 593         {
 594                 snprintf(errmsgbuf, n, "Need sender to permit access.");
 595                 return (ERROR + USERNAME_REQUIRED);
 596         }
 597
 598         begin_critical_section(S_NETCONFIGS);
 599         RNCfg = CtdlGetNetCfgForRoom (CC->room.QRnumber);
 600         if (RNCfg == NULL)
 601         {
 602                 end_critical_section(S_NETCONFIGS);
 603                 snprintf(errmsgbuf, n,
 604                          "This mailing list only accepts posts from subscribers.");
 605                 return (ERROR + NO_SUCH_USER);
 606         }
 607         found = is_recipient (RNCfg, RemoteIdentifier);
 608         FreeRoomNetworkStruct(&RNCfg);
 609         end_critical_section(S_NETCONFIGS);
 610
 611         if (found) {
 612                 return (0);
 613         }
 614         else {
 615                 snprintf(errmsgbuf, n,
 616                          "This mailing list only accepts posts from subscribers.");
 617                 return (ERROR + NO_SUCH_USER);
 618         }
 619 }
 620
 621
 622
 623 /*
 624  * cmd_netp() - authenticate to the server as another Citadel node polling
 625  *            for network traffic
 626  */
 627 void cmd_netp(char *cmdbuf)
 628 {
 629         struct CitContext *CCC = CC;
 630         HashList *working_ignetcfg;
 631         char *node;
 632         StrBuf *NodeStr;
 633         long nodelen;
 634         int v;
 635         long lens[2];
 636         const char *strs[2];
 637
 638         const StrBuf *secret = NULL;
 639         const StrBuf *nexthop = NULL;
 640         char err_buf[SIZ] = "";
 641
 642         /* Authenticate */
 643         node = CCC->curr_user;
 644         nodelen = extract_token(CCC->curr_user, cmdbuf, 0, '|', sizeof CCC->curr_user);
 645         NodeStr = NewStrBufPlain(node, nodelen);
 646         /* load the IGnet Configuration to check node validity */
 647         working_ignetcfg = CtdlLoadIgNetCfg();
 648         v = CtdlIsValidNode(&nexthop, &secret, NodeStr, working_ignetcfg, NULL);
 649         if (v != 0) {
 650                 snprintf(err_buf, sizeof err_buf,
 651                         "An unknown Citadel server called \"%s\" attempted to connect from %s [%s].\n",
 652                         node, CCC->cs_host, CCC->cs_addr
 653                 );
 654                 syslog(LOG_WARNING, "%s", err_buf);
 655                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 656
 657                 strs[0] = CCC->cs_addr;
 658                 lens[0] = strlen(CCC->cs_addr);
 659
 660                 strs[1] = "SRV_UNKNOWN";
 661                 lens[1] = sizeof("SRV_UNKNOWN") - 1;
 662
 663                 CtdlAideFPMessage(
 664                         err_buf,
 665                         "IGNet Networking.",
 666                         2, strs, (long*) &lens,
 667                         CCC->cs_pid, 0,
 668                         time(NULL));
 669
 670                 DeleteHash(&working_ignetcfg);
 671                 FreeStrBuf(&NodeStr);
 672                 return;
 673         }
 674
 675         extract_token(CCC->user.password, cmdbuf, 1, '|', sizeof CCC->user.password);
 676         if (strcasecmp(CCC->user.password, ChrPtr(secret))) {
 677                 snprintf(err_buf, sizeof err_buf,
 678                         "A Citadel server at %s [%s] failed to authenticate as network node \"%s\".\n",
 679                         CCC->cs_host, CCC->cs_addr, node
 680                 );
 681                 syslog(LOG_WARNING, "%s", err_buf);
 682                 cprintf("%d authentication failed\n", ERROR + PASSWORD_REQUIRED);
 683
 684                 strs[0] = CCC->cs_addr;
 685                 lens[0] = strlen(CCC->cs_addr);
 686
 687                 strs[1] = "SRV_PW";
 688                 lens[1] = sizeof("SRV_PW") - 1;
 689
 690                 CtdlAideFPMessage(
 691                         err_buf,
 692                         "IGNet Networking.",
 693                         2, strs,
 694                         (long*) &lens,
 695                         CCC->cs_pid, 0,
 696                         time(NULL));
 697
 698                 DeleteHash(&working_ignetcfg);
 699                 FreeStrBuf(&NodeStr);
 700                 return;
 701         }
 702
 703         if (CtdlNetworkTalkingTo(node, nodelen, NTT_CHECK)) {
 704                 syslog(LOG_WARNING, "Duplicate session for network node <%s>", node);
 705                 cprintf("%d Already talking to %s right now\n", ERROR + RESOURCE_BUSY, node);
 706                 DeleteHash(&working_ignetcfg);
 707                 FreeStrBuf(&NodeStr);
 708                 return;
 709         }
 710         nodelen = safestrncpy(CCC->net_node, node, sizeof CCC->net_node);
 711         CtdlNetworkTalkingTo(CCC->net_node, nodelen, NTT_ADD);
 712         syslog(LOG_NOTICE, "Network node <%s> logged in from %s [%s]",
 713                 CCC->net_node, CCC->cs_host, CCC->cs_addr
 714         );
 715         cprintf("%d authenticated as network node '%s'\n", CIT_OK, CCC->net_node);
 716         DeleteHash(&working_ignetcfg);
 717         FreeStrBuf(&NodeStr);
 718 }
 719
 720
 721 /*-----------------------------------------------------------------------------*
 722  *                 Network maps: evaluate other nodes                          *
 723  *-----------------------------------------------------------------------------*/
 724
 725 void DeleteNetMap(void *vNetMap)
 726 {
 727         CtdlNetMap *TheNetMap = (CtdlNetMap*) vNetMap;
 728         FreeStrBuf(&TheNetMap->NodeName);
 729         FreeStrBuf(&TheNetMap->NextHop);
 730         free(TheNetMap);
 731 }
 732
 733 CtdlNetMap *NewNetMap(StrBuf *SerializedNetMap)
 734 {
 735         const char *Pos = NULL;
 736         CtdlNetMap *NM;
 737
 738         /* we need at least 3 pipes and some other text so its invalid. */
 739         if (StrLength(SerializedNetMap) < 6)
 740                 return NULL;
 741         NM = (CtdlNetMap *) malloc(sizeof(CtdlNetMap));
 742
 743         NM->NodeName=NewStrBuf();
 744         StrBufExtract_NextToken(NM->NodeName, SerializedNetMap, &Pos, '|');
 745
 746         NM->lastcontact = StrBufExtractNext_long(SerializedNetMap, &Pos, '|');
 747
 748         NM->NextHop=NewStrBuf();
 749         StrBufExtract_NextToken(NM->NextHop, SerializedNetMap, &Pos, '|');
 750
 751         return NM;
 752 }
 753
 754 HashList* CtdlReadNetworkMap(void)
 755 {
 756         const char *LinePos;
 757         char       *Cfg;
 758         StrBuf     *Buf;
 759         StrBuf     *LineBuf;
 760         HashList   *Hash;
 761         CtdlNetMap     *TheNetMap;
 762
 763         Hash = NewHash(1, NULL);
 764         Cfg =  CtdlGetSysConfig(IGNETMAP);
 765         if ((Cfg == NULL) || IsEmptyStr(Cfg)) {
 766                 if (Cfg != NULL)
 767                         free(Cfg);
 768                 return Hash;
 769         }
 770
 771         Buf = NewStrBufPlain(Cfg, -1);
 772         free(Cfg);
 773         LineBuf = NewStrBufPlain(NULL, StrLength(Buf));
 774         LinePos = NULL;
 775         while (StrBufSipLine(Buf, LineBuf, &LinePos))
 776         {
 777                 TheNetMap = NewNetMap(LineBuf);
 778                 if (TheNetMap != NULL) { /* TODO: is the NodeName Uniq? */
 779                         Put(Hash, SKEY(TheNetMap->NodeName), TheNetMap, DeleteNetMap);
 780                 }
 781         }
 782         FreeStrBuf(&Buf);
 783         FreeStrBuf(&LineBuf);
 784         return Hash;
 785 }
 786
 787 StrBuf *CtdlSerializeNetworkMap(HashList *Map)
 788 {
 789         void *vMap;
 790         const char *key;
 791         long len;
 792         StrBuf *Ret = NewStrBuf();
 793         HashPos *Pos = GetNewHashPos(Map, 0);
 794
 795         while (GetNextHashPos(Map, Pos, &len, &key, &vMap))
 796         {
 797                 CtdlNetMap *pMap = (CtdlNetMap*) vMap;
 798                 StrBufAppendBuf(Ret, pMap->NodeName, 0);
 799                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
 800
 801                 StrBufAppendPrintf(Ret, "%ld", pMap->lastcontact, 0);
 802                 StrBufAppendBufPlain(Ret, HKEY("|"), 0);
 803
 804                 StrBufAppendBuf(Ret, pMap->NextHop, 0);
 805                 StrBufAppendBufPlain(Ret, HKEY("\n"), 0);
 806         }
 807         DeleteHashPos(&Pos);
 808         return Ret;
 809 }
 810
 811
 812 /*
 813  * Learn topology from path fields
 814  */
 815 void NetworkLearnTopology(char *node, char *path, HashList *the_netmap, int *netmap_changed)
 816 {
 817         CtdlNetMap *pNM = NULL;
 818         void *vptr;
 819         char nexthop[256];
 820         CtdlNetMap *nmptr;
 821
 822         if (GetHash(the_netmap, node, strlen(node), &vptr) &&
 823             (vptr != NULL))/* TODO: is the NodeName Uniq? */
 824         {
 825                 pNM = (CtdlNetMap*)vptr;
 826                 extract_token(nexthop, path, 0, '!', sizeof nexthop);
 827                 if (!strcmp(nexthop, ChrPtr(pNM->NextHop))) {
 828                         pNM->lastcontact = time(NULL);
 829                         (*netmap_changed) ++;
 830                         return;
 831                 }
 832         }
 833
 834         /* If we got here then it's not in the map, so add it. */
 835         nmptr = (CtdlNetMap *) malloc(sizeof (CtdlNetMap));
 836         nmptr->NodeName = NewStrBufPlain(node, -1);
 837         nmptr->lastcontact = time(NULL);
 838         nmptr->NextHop = NewStrBuf ();
 839         StrBufExtract_tokenFromStr(nmptr->NextHop, path, strlen(path), 0, '!');
 840         /* TODO: is the NodeName Uniq? */
 841         Put(the_netmap, SKEY(nmptr->NodeName), nmptr, DeleteNetMap);
 842         (*netmap_changed) ++;
 843 }
 844
 845
 846 /*
 847  * Check the network map and determine whether the supplied node name is
 848  * valid.  If it is not a neighbor node, supply the name of a neighbor node
 849  * which is the next hop.  If it *is* a neighbor node, we also fill in the
 850  * shared secret.
 851  */
 852 int CtdlIsValidNode(const StrBuf **nexthop,
 853                     const StrBuf **secret,
 854                     StrBuf *node,
 855                     HashList *IgnetCfg,
 856                     HashList *the_netmap)
 857 {
 858         void *vNetMap;
 859         void *vNodeConf;
 860         CtdlNodeConf *TheNode;
 861         CtdlNetMap *TheNetMap;
 862
 863         if (StrLength(node) == 0) {
 864                 return(-1);
 865         }
 866
 867         /*
 868          * First try the neighbor nodes
 869          */
 870         if (GetCount(IgnetCfg) == 0) {
 871                 syslog(LOG_INFO, "IgnetCfg is empty!");
 872                 if (nexthop != NULL) {
 873                         *nexthop = NULL;
 874                 }
 875                 return(-1);
 876         }
 877
 878         /* try to find a neigbour with the name 'node' */
 879         if (GetHash(IgnetCfg, SKEY(node), &vNodeConf) &&
 880             (vNodeConf != NULL))
 881         {
 882                 TheNode = (CtdlNodeConf*)vNodeConf;
 883                 if (secret != NULL)
 884                         *secret = TheNode->Secret;
 885                 return 0;               /* yup, it's a direct neighbor */
 886         }
 887
 888         /*
 889          * If we get to this point we have to see if we know the next hop
 890          *//* TODO: is the NodeName Uniq? */
 891         if ((GetCount(the_netmap) > 0) &&
 892             (GetHash(the_netmap, SKEY(node), &vNetMap)))
 893         {
 894                 TheNetMap = (CtdlNetMap*)vNetMap;
 895                 if (nexthop != NULL)
 896                         *nexthop = TheNetMap->NextHop;
 897                 return(0);
 898         }
 899
 900         /*
 901          * If we get to this point, the supplied node name is bogus.
 902          */
 903         syslog(LOG_ERR, "Invalid node name <%s>", ChrPtr(node));
 904         return(-1);
 905 }
 906
 907
 908 /*
 909  * Convert any legacy configuration files in the "netconfigs" directory
 910  */
 911 void convert_legacy_netcfg_files(void)
 912 {
 913         DIR *dh = NULL;
 914         struct dirent *dit = NULL;
 915         char filename[PATH_MAX];
 916         long roomnum;
 917         FILE *fp;
 918         long len;
 919         char *v;
 920
 921         dh = opendir(ctdl_netcfg_dir);
 922         if (!dh) return;
 923
 924         syslog(LOG_INFO, "Legacy netconfig files exist - converting them!");
 925
 926         while (dit = readdir(dh), dit != NULL) {                // yes, we use the non-reentrant version; we're not in threaded mode yet
 927                 roomnum = atol(dit->d_name);
 928                 if (roomnum > 0) {
 929                         snprintf(filename, sizeof filename, "%s/%ld", ctdl_netcfg_dir, roomnum);
 930                         fp = fopen(filename, "r");
 931                         if (fp) {
 932                                 fseek(fp, 0L, SEEK_END);
 933                                 len = ftell(fp);
 934                                 if (len > 0) {
 935                                         v = malloc(len);
 936                                         if (v) {
 937                                                 rewind(fp);
 938                                                 if (fread(v, len, 1, fp)) {
 939                                                         write_netconfig_to_configdb(roomnum, v);
 940                                                         unlink(filename);
 941                                                 }
 942                                                 free(v);
 943                                         }
 944                                 }
 945                                 else {
 946                                         unlink(filename);       // zero length netconfig, just delete it
 947                                 }
 948                                 fclose(fp);
 949                         }
 950                 }
 951         }
 952
 953         closedir(dh);
 954         rmdir(ctdl_netcfg_dir);
 955 }
 956
 957
 958
 959 /*
 960  * Module entry point
 961  */
 962 CTDL_MODULE_INIT(netconfig)
 963 {
 964         if (!threading)
 965         {
 966                 convert_legacy_netcfg_files();
 967                 CtdlRegisterProtoHook(cmd_gnet, "GNET", "Get network config");
 968                 CtdlRegisterProtoHook(cmd_snet, "SNET", "Set network config");
 969                 CtdlRegisterProtoHook(cmd_netp, "NETP", "Identify as network poller");
 970         }
 971         return "netconfig";
 972 }