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