231 lines
6.6 KiB
C
231 lines
6.6 KiB
C
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/*****************************************************************************
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*
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* $Id: getheader.c,v 1.14 2006/03/20 12:36:21 mbse Exp $
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* Purpose ...............: Read fidonet .pkt header
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*
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*****************************************************************************
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* Copyright (C) 1997-2006
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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#include "../config.h"
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#include "mbselib.h"
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faddr pktfrom;
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char pktpwd[9];
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/*
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* Return codes:
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* 0 - All Seems Well
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* 1 - Invalid type (not 2 or 2+)
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* 2 - Read header error
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* 3 - Not for me
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* 4 - Password error
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* 5 - Unsecure session
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*
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* If session is TRUE, the password is checked as being the session password,
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* otherwise it is checked as the mail password.
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*/
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int getheader(faddr *f, faddr *t, FILE *pkt, char *pname, int session)
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{
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unsigned char buffer[0x3a];
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int i, capword, prodx, major, minor = 0, tome = FALSE;
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char *p, *prodn = NULL, *fa, *ta, buf[5];
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int year, month, day, hour, min, sec;
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f->domain = NULL;
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f->name = NULL;
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t->domain = NULL;
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t->name = NULL;
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/*
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* Read type 2+ packet header, see FSC-0039 version 4 and FTS-0001
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*/
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if (fread(buffer, 1, 0x3a, pkt) != 0x3a) {
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WriteError("Could not read header (%s)", pname);
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return 2;
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}
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if ((buffer[0x12] + (buffer[0x13] << 8)) != 2) {
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WriteError("Not a type 2 packet (%s)", pname);
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return 1;
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}
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f->node = (buffer[0x01] << 8) + buffer[0x00];
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t->node = (buffer[0x03] << 8) + buffer[0x02];
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f->net = (buffer[0x15] << 8) + buffer[0x14];
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t->net = (buffer[0x17] << 8) + buffer[0x16];
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f->zone = (buffer[0x23] << 8) + buffer[0x22];
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t->zone = (buffer[0x25] << 8) + buffer[0x24];
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year = (buffer[0x05] << 8) + buffer[0x04];
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/*
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* Check for Y2K bugs, if there are any this is not important,
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* it is just for logging!
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*/
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if (year < 50)
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year = year + 2000;
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else if (year < 1900)
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year = year + 1900;
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month = (buffer[0x07] << 8) + buffer[0x06] + 1;
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day = (buffer[0x09] << 8) + buffer[0x08];
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hour = (buffer[0x0b] << 8) + buffer[0x0a];
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min = (buffer[0x0d] << 8) + buffer[0x0c];
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sec = (buffer[0x0f] << 8) + buffer[0x0e];
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prodx = buffer[0x18];
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major = buffer[0x19];
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capword = (buffer[0x2d] << 8) + buffer[0x2c];
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if (capword != ((buffer[0x28] << 8) + buffer[0x29]))
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capword = 0;
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if (capword & 0x0001) {
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/*
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* FSC-0039 packet type 2+
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*/
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prodx = prodx + (buffer[0x2a] << 8);
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minor = buffer[0x2b];
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f->zone = buffer[0x2e] + (buffer[0x2f] << 8);
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t->zone = buffer[0x30] + (buffer[0x31] << 8);
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f->point = buffer[0x32] + (buffer[0x33] << 8);
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t->point = buffer[0x34] + (buffer[0x35] << 8);
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} else {
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/*
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* Stone age @%#$@
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*/
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f->zone = buffer[0x22] + (buffer[0x23] << 8);
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t->zone = buffer[0x24] + (buffer[0x25] << 8);
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if ((f->zone == 0) && (t->zone == 0)) {
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/*
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* No zone info, since the packet should be for us, guess the zone
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* against our aka's from the setup using a 2d test.
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*/
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for (i = 0; i < 40; i++) {
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if ((CFG.akavalid[i]) && (t->net == CFG.aka[i].net) && (t->node == CFG.aka[i].node)) {
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t->zone = CFG.aka[i].zone;
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f->zone = CFG.aka[i].zone;
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Syslog('!', "Warning, zone %d assumed", CFG.aka[i].zone);
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break;
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}
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}
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}
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}
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for (i = 0; i < 8; i++)
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pktpwd[i] = buffer[0x1a + i];
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pktpwd[8]='\0';
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for (p = pktpwd + 7; (p >= pktpwd) && (*p == ' '); p--) *p='\0';
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if (pktpwd[0])
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f->name = pktpwd;
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/*
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* Fill in a default product code in case it doesn't exist
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*/
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snprintf(buf, 5, "%04x", prodx);
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prodn = xstrcpy((char *)"Unknown 0x");
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prodn = xstrcat(prodn, buf);
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for (i = 0; ftscprod[i].name; i++)
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if (ftscprod[i].code == prodx) {
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free(prodn);
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prodn = xstrcpy(ftscprod[i].name);
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break;
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}
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pktfrom.name = NULL;
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pktfrom.domain = NULL;
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pktfrom.zone = f->zone;
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pktfrom.net = f->net;
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pktfrom.node = f->node;
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if (capword & 0x0001)
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pktfrom.point = f->point;
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else
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pktfrom.point = 0;
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for (i = 0; i < 40; i++) {
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if ((CFG.akavalid[i]) && ((t->zone == 0) || (t->zone == CFG.aka[i].zone)) &&
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(t->net == CFG.aka[i].net) && (t->node == CFG.aka[i].node) &&
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((!(capword & 0x0001)) || (t->point == CFG.aka[i].point) || (t->point && !CFG.aka[i].point)))
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tome = TRUE;
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}
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fa = xstrcpy(ascfnode(f, 0x1f));
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ta = xstrcpy(ascfnode(t, 0x1f));
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Syslog('+', "Packet : %s type %s", pname, (capword & 0x0001) ? "2+":"stone-age");
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Syslog('+', "From : %s to %s", fa, ta);
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Syslog('+', "Dated : %02u-%02u-%u %02u:%02u:%02u", day, month, year, hour, min, sec);
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Syslog('+', "Program : %s %d.%d", prodn, major, minor);
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free(ta);
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free(fa);
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if (capword & 0x0001) {
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buf[0] = buffer[0x36];
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buf[1] = buffer[0x37];
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buf[2] = buffer[0x38];
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buf[3] = buffer[0x39];
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buf[4] = '\0';
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}
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if (prodn)
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free(prodn);
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if (!tome)
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return 3;
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if (session) {
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/*
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* FTS-0001 session setup mode.
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*/
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if (noderecord(f) && strlen(nodes.Spasswd)) {
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if (strcasecmp(nodes.Spasswd, pktpwd) == 0) {
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return 0; /* Secure session */
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} else {
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Syslog('!', "Password : got \"%s\", expected \"%s\"", pktpwd, nodes.Spasswd);
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return 4; /* Bad password */
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}
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} else {
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Syslog('+', "Node not in setup or no password set");
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return 5; /* Unsecure session */
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}
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} else {
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/*
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* Mail password check
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*/
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if (noderecord(f) && nodes.MailPwdCheck && strlen(nodes.Epasswd)) {
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if (strcasecmp(nodes.Epasswd, pktpwd) == 0) {
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return 0; /* Password Ok */
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} else {
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Syslog('!', "Password : got \"%s\", expected \"%s\"", pktpwd, nodes.Epasswd);
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return 4; /* Bad password */
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}
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} else {
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return 0; /* Not checked, still Ok */
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}
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}
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return 0;
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}
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