/***************************************************************************** * * $Id: getheader.c,v 1.14 2006/03/20 12:36:21 mbse Exp $ * Purpose ...............: Read fidonet .pkt header * ***************************************************************************** * Copyright (C) 1997-2006 * * 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, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *****************************************************************************/ #include "../config.h" #include "mbselib.h" faddr pktfrom; char pktpwd[9]; /* * Return codes: * 0 - All Seems Well * 1 - Invalid type (not 2 or 2+) * 2 - Read header error * 3 - Not for me * 4 - Password error * 5 - Unsecure session * * If session is TRUE, the password is checked as being the session password, * otherwise it is checked as the mail password. */ int getheader(faddr *f, faddr *t, FILE *pkt, char *pname, int session) { unsigned char buffer[0x3a]; int i, capword, prodx, major, minor = 0, tome = FALSE; char *p, *prodn = NULL, *fa, *ta, buf[5]; int year, month, day, hour, min, sec; f->domain = NULL; f->name = NULL; t->domain = NULL; t->name = NULL; /* * Read type 2+ packet header, see FSC-0039 version 4 and FTS-0001 */ if (fread(buffer, 1, 0x3a, pkt) != 0x3a) { WriteError("Could not read header (%s)", pname); return 2; } if ((buffer[0x12] + (buffer[0x13] << 8)) != 2) { WriteError("Not a type 2 packet (%s)", pname); return 1; } f->node = (buffer[0x01] << 8) + buffer[0x00]; t->node = (buffer[0x03] << 8) + buffer[0x02]; f->net = (buffer[0x15] << 8) + buffer[0x14]; t->net = (buffer[0x17] << 8) + buffer[0x16]; f->zone = (buffer[0x23] << 8) + buffer[0x22]; t->zone = (buffer[0x25] << 8) + buffer[0x24]; year = (buffer[0x05] << 8) + buffer[0x04]; /* * Check for Y2K bugs, if there are any this is not important, * it is just for logging! */ if (year < 50) year = year + 2000; else if (year < 1900) year = year + 1900; month = (buffer[0x07] << 8) + buffer[0x06] + 1; day = (buffer[0x09] << 8) + buffer[0x08]; hour = (buffer[0x0b] << 8) + buffer[0x0a]; min = (buffer[0x0d] << 8) + buffer[0x0c]; sec = (buffer[0x0f] << 8) + buffer[0x0e]; prodx = buffer[0x18]; major = buffer[0x19]; capword = (buffer[0x2d] << 8) + buffer[0x2c]; if (capword != ((buffer[0x28] << 8) + buffer[0x29])) capword = 0; if (capword & 0x0001) { /* * FSC-0039 packet type 2+ */ prodx = prodx + (buffer[0x2a] << 8); minor = buffer[0x2b]; f->zone = buffer[0x2e] + (buffer[0x2f] << 8); t->zone = buffer[0x30] + (buffer[0x31] << 8); f->point = buffer[0x32] + (buffer[0x33] << 8); t->point = buffer[0x34] + (buffer[0x35] << 8); } else { /* * Stone age @%#$@ */ f->zone = buffer[0x22] + (buffer[0x23] << 8); t->zone = buffer[0x24] + (buffer[0x25] << 8); if ((f->zone == 0) && (t->zone == 0)) { /* * No zone info, since the packet should be for us, guess the zone * against our aka's from the setup using a 2d test. */ for (i = 0; i < 40; i++) { if ((CFG.akavalid[i]) && (t->net == CFG.aka[i].net) && (t->node == CFG.aka[i].node)) { t->zone = CFG.aka[i].zone; f->zone = CFG.aka[i].zone; Syslog('!', "Warning, zone %d assumed", CFG.aka[i].zone); break; } } } } for (i = 0; i < 8; i++) pktpwd[i] = buffer[0x1a + i]; pktpwd[8]='\0'; for (p = pktpwd + 7; (p >= pktpwd) && (*p == ' '); p--) *p='\0'; if (pktpwd[0]) f->name = pktpwd; /* * Fill in a default product code in case it doesn't exist */ snprintf(buf, 5, "%04x", prodx); prodn = xstrcpy((char *)"Unknown 0x"); prodn = xstrcat(prodn, buf); for (i = 0; ftscprod[i].name; i++) if (ftscprod[i].code == prodx) { free(prodn); prodn = xstrcpy(ftscprod[i].name); break; } pktfrom.name = NULL; pktfrom.domain = NULL; pktfrom.zone = f->zone; pktfrom.net = f->net; pktfrom.node = f->node; if (capword & 0x0001) pktfrom.point = f->point; else pktfrom.point = 0; for (i = 0; i < 40; i++) { if ((CFG.akavalid[i]) && ((t->zone == 0) || (t->zone == CFG.aka[i].zone)) && (t->net == CFG.aka[i].net) && (t->node == CFG.aka[i].node) && ((!(capword & 0x0001)) || (t->point == CFG.aka[i].point) || (t->point && !CFG.aka[i].point))) tome = TRUE; } fa = xstrcpy(ascfnode(f, 0x1f)); ta = xstrcpy(ascfnode(t, 0x1f)); Syslog('+', "Packet : %s type %s", pname, (capword & 0x0001) ? "2+":"stone-age"); Syslog('+', "From : %s to %s", fa, ta); Syslog('+', "Dated : %02u-%02u-%u %02u:%02u:%02u", day, month, year, hour, min, sec); Syslog('+', "Program : %s %d.%d", prodn, major, minor); free(ta); free(fa); if (capword & 0x0001) { buf[0] = buffer[0x36]; buf[1] = buffer[0x37]; buf[2] = buffer[0x38]; buf[3] = buffer[0x39]; buf[4] = '\0'; } if (prodn) free(prodn); if (!tome) return 3; if (session) { /* * FTS-0001 session setup mode. */ if (noderecord(f) && strlen(nodes.Spasswd)) { if (strcasecmp(nodes.Spasswd, pktpwd) == 0) { return 0; /* Secure session */ } else { Syslog('!', "Password : got \"%s\", expected \"%s\"", pktpwd, nodes.Spasswd); return 4; /* Bad password */ } } else { Syslog('+', "Node not in setup or no password set"); return 5; /* Unsecure session */ } } else { /* * Mail password check */ if (noderecord(f) && nodes.MailPwdCheck && strlen(nodes.Epasswd)) { if (strcasecmp(nodes.Epasswd, pktpwd) == 0) { return 0; /* Password Ok */ } else { Syslog('!', "Password : got \"%s\", expected \"%s\"", pktpwd, nodes.Epasswd); return 4; /* Bad password */ } } else { return 0; /* Not checked, still Ok */ } } return 0; }