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deb-mbse/lib/packet.c

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/*****************************************************************************
*
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* $Id$
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* Purpose ...............: Fidonet mailer
*
*****************************************************************************
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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 "common.h"
#include "dbnode.h"
static FILE *pktfp=NULL;
static faddr pktroute =
{
NULL,0,0,0,0,NULL
};
FILE *openpkt(FILE *pkt, faddr *addr, char flavor)
{
off_t pos;
struct flock fl;
struct stat st;
char *Name;
struct tm *ptm;
time_t t;
int i;
faddr *bestaka;
unsigned char buffer[0x3a];
char str[9];
if (pkt == NULL) {
if (pktfp) {
Syslog('P', "packet opened, check address");
if (metric(addr,&pktroute) == 0) {
if ((CFG.maxpktsize == 0L) ||
((fstat(fileno(pktfp),&st) == 0) &&
(st.st_size < CFG.maxpktsize))) {
Syslog('P', "return existing fp");
return pktfp;
}
Syslog('P', "packet too big, open new");
closepkt();
} else {
Syslog('P', "address changed, closing fp");
closepkt();
}
}
Syslog('P', "open new packet file");
pktroute.zone = addr->zone;
pktroute.net = addr->net;
pktroute.node = addr->node;
pktroute.point = addr->point;
pktroute.domain = xstrcpy(addr->domain);
pktroute.name = NULL;
Name = pktname(addr,flavor);
mkdirs(Name);
if ((pktfp = fopen(Name, "r+")) == NULL)
pktfp = fopen(Name,"w");
if (pktfp == NULL) {
WriteError("$Unable to open packet %s",MBSE_SS(Name));
return NULL;
}
fl.l_type = F_WRLCK;
fl.l_whence = 0;
fl.l_start = 0L;
fl.l_len = 0L;
if (fcntl(fileno(pktfp), F_SETLKW, &fl) < 0) {
WriteError("$Unable to lock packet %s", MBSE_SS(Name));
fclose(pktfp);
return NULL;
}
pkt = pktfp;
pos = fseek(pkt, -2L, SEEK_END);
}
pos = ftell(pkt);
if (pos <= 0L) {
Syslog('P', "creating new .pkt");
memset(&buffer, 0, sizeof(buffer));
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t = time(NULL);
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ptm = localtime(&t);
if (ptm->tm_sec > 59)
ptm->tm_sec = 59;
bestaka = bestaka_s(addr);
buffer[0x00] = (bestaka->node & 0x00ff);
buffer[0x01] = (bestaka->node & 0xff00) >> 8;
buffer[0x02] = (addr->node & 0x00ff);
buffer[0x03] = (addr->node & 0xff00) >> 8;
buffer[0x04] = ((ptm->tm_year + 1900) & 0x00ff);
buffer[0x05] = ((ptm->tm_year + 1900) & 0xff00) >> 8;
buffer[0x06] = ptm->tm_mon;
buffer[0x08] = ptm->tm_mday;
buffer[0x0a] = ptm->tm_hour;
buffer[0x0c] = ptm->tm_min;
buffer[0x0e] = ptm->tm_sec;
buffer[0x12] = 2;
buffer[0x14] = (bestaka->net & 0x00ff);
buffer[0x15] = (bestaka->net & 0xff00) >> 8;
buffer[0x16] = (addr->net & 0x00ff);
buffer[0x17] = (addr->net & 0xff00) >> 8;
buffer[0x18] = 0xfe;
memset(&str, 0, 8);
if (noderecord(addr) && strlen(nodes.Epasswd))
sprintf(str, "%s", nodes.Epasswd);
for (i = 0; i < 8; i++)
buffer[0x1a + i] = str[i];
buffer[0x22] = (bestaka->zone & 0x00ff);
buffer[0x23] = (bestaka->zone & 0xff00) >> 8;
buffer[0x24] = (addr->zone & 0x00ff);
buffer[0x25] = (addr->zone & 0xff00) >> 8;
buffer[0x29] = 1;
buffer[0x2c] = 1;
buffer[0x2e] = buffer[0x22];
buffer[0x2f] = buffer[0x23];
buffer[0x30] = buffer[0x24];
buffer[0x31] = buffer[0x25];
buffer[0x32] = (bestaka->point & 0x00ff);
buffer[0x33] = (bestaka->point & 0xff00) >> 8;
buffer[0x34] = (addr->point & 0x00ff);
buffer[0x35] = (addr->point & 0xff00) >> 8;
buffer[0x36] = 'm';
buffer[0x37] = 'b';
buffer[0x38] = 's';
buffer[0x39] = 'e';
fseek(pkt, 0L, SEEK_SET);
fwrite(buffer, 1, 0x3a, pkt);
}
return pkt;
}
void closepkt(void)
{
unsigned char buffer[2];
Syslog('P', "closepkt entered");
memset(&buffer, 0, sizeof(buffer));
if (pktfp) {
fwrite(buffer, 1, 2, pktfp);
fclose(pktfp); /* close also discards lock */
}
pktfp = NULL;
if (pktroute.domain)
free(pktroute.domain);
}