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deb-mbse/lib/dbnode.c

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2001-08-17 05:46:24 +00:00
/*****************************************************************************
*
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* $Id$
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* Purpose ...............: Noderecord Access
*
*****************************************************************************
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* Copyright (C) 1997-2002
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*
* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*****************************************************************************/
#include "libs.h"
#include "structs.h"
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#include "users.h"
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#include "records.h"
#include "clcomm.h"
#include "dbcfg.h"
#include "dbnode.h"
char nodes_fil[PATH_MAX]; /* Nodes database filename */
long nodes_pos = -1; /* Noderecord position */
long nodes_fgp = -1; /* Nodes files group position */
long nodes_mgp = -1; /* Nodes message group position */
unsigned long nodes_crc = -1; /* Noderecord crc value */
int InitNode(void)
{
FILE *fil;
memset(&nodes, 0, sizeof(nodes));
LoadConfig();
sprintf(nodes_fil, "%s/etc/nodes.data", getenv("MBSE_ROOT"));
if ((fil = fopen(nodes_fil, "r")) == NULL)
return FALSE;
fread(&nodeshdr, sizeof(nodeshdr), 1, fil);
fseek(fil, 0, SEEK_END);
nodes_cnt = (ftell(fil) - nodeshdr.hdrsize) / (nodeshdr.recsize + nodeshdr.filegrp + nodeshdr.mailgrp);
fclose(fil);
return TRUE;
}
int TestNode(fidoaddr aka)
{
int i, nodeok = FALSE;
for (i = 0; i < 20; i++) {
if (((aka.zone == 0) || (aka.zone = nodes.Aka[i].zone)) &&
(aka.net == nodes.Aka[i].net) &&
(aka.node == nodes.Aka[i].node) &&
(aka.point == nodes.Aka[i].point))
nodeok = TRUE;
}
return(nodeok);
}
int SearchNode(fidoaddr aka)
{
FILE *fil;
nodes_pos = -1;
nodes_crc = -1;
if ((fil = fopen(nodes_fil, "r")) == NULL)
return FALSE;
fread(&nodeshdr, sizeof(nodeshdr), 1, fil);
while (fread(&nodes, nodeshdr.recsize, 1, fil) == 1) {
fseek(fil, nodeshdr.filegrp + nodeshdr.mailgrp, SEEK_CUR);
if (TestNode(aka)) {
nodes_pos = ftell(fil) - (nodeshdr.recsize + nodeshdr.filegrp + nodeshdr.mailgrp);
fclose(fil);
nodes_crc = 0xffffffff;
nodes_crc = upd_crc32((char *)&nodes, nodes_crc, nodeshdr.recsize);
return TRUE;
}
}
memset(&nodes, 0, sizeof(nodes));
fclose(fil);
return FALSE;
}
/*
* Update current noderecord if changed.
*/
int UpdateNode()
{
unsigned long crc;
FILE *fil;
if (nodes_pos == -1)
return FALSE;
crc = 0xffffffff;
crc = upd_crc32((char *)&nodes, crc, nodeshdr.recsize);
if (crc != nodes_crc) {
if ((fil = fopen(nodes_fil, "r+")) == NULL)
return FALSE;
fseek(fil, nodes_pos, SEEK_SET);
fwrite(&nodes, nodeshdr.recsize, 1, fil);
fclose(fil);
}
nodes_crc = -1;
nodes_pos = -1;
memset(&nodes, 0, sizeof(nodes));
return TRUE;
}
char *GetNodeMailGrp(int First)
{
FILE *fil;
char group[13], *gr;
if (nodes_pos == -1)
return NULL;
if (First)
nodes_mgp = nodes_pos + nodeshdr.recsize + nodeshdr.filegrp;
if (nodes_mgp > (nodes_pos + nodeshdr.recsize + nodeshdr.filegrp + nodeshdr.mailgrp))
return NULL;
if ((fil = fopen(nodes_fil, "r")) == NULL)
return NULL;
fseek(fil, nodes_mgp, SEEK_SET);
fread(&group, sizeof(group), 1, fil);
fclose(fil);
nodes_mgp += sizeof(group);
if (group[0] == '\0')
return NULL;
gr = xstrcpy(group);
return gr;
}
char *GetNodeFileGrp(int First)
{
FILE *fil;
char group[13], *gr;
if (nodes_pos == -1)
return NULL;
if (First)
nodes_fgp = nodes_pos + nodeshdr.recsize;
if (nodes_fgp > (nodes_pos + nodeshdr.recsize + nodeshdr.filegrp))
return NULL;
if ((fil = fopen(nodes_fil, "r")) == NULL)
return NULL;
fseek(fil, nodes_fgp, SEEK_SET);
fread(&group, sizeof(group), 1, fil);
fclose(fil);
nodes_fgp += sizeof(group);
if (group[0] == '\0')
return NULL;
gr = xstrcpy(group);
return gr;
}