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gbeauche |
1.1 |
/*
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* ftp.cpp - ip router
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*
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* Basilisk II (C) 1997-2001 Christian Bauer
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*
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* Windows platform specific code copyright (C) Lauri Pesonen
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sysdeps.h"
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#include <ctype.h>
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#include "dump.h"
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#include "prefs.h"
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#include "ftp.h"
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#if DEBUG
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#pragma optimize("",off)
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#endif
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#include "debug.h"
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static int m_ftp_port_count = 0;
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#define MAX_FTP_PORTS 100
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static uint16 m_ftp_ports[MAX_FTP_PORTS];
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bool ftp_is_ftp_port( uint16 port )
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{
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for( int i=0; i<m_ftp_port_count; i++ ) {
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if( m_ftp_ports[i] == port ) return true;
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}
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return false;
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}
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void init_ftp()
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{
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const char *str = PrefsFindString("ftp_port_list");
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if(str) {
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char *ftp = new char [ strlen(str) + 1 ];
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if(ftp) {
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strcpy( ftp, str );
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char *p = ftp;
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while( p && *p ) {
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char *pp = strchr( p, ',' );
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if(pp) *pp++ = 0;
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if( m_ftp_port_count < MAX_FTP_PORTS ) {
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m_ftp_ports[m_ftp_port_count++] = (uint16)strtoul(p,0,0);
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}
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p = pp;
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}
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delete [] ftp;
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}
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}
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}
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void ftp_modify_port_command(
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char *buf,
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int &count,
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const uint32 max_size,
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const uint32 ip,
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const uint16 port,
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const bool is_pasv
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)
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{
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if( max_size < 100 ) {
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// impossible
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return;
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}
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sprintf(
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buf,
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(is_pasv ? "227 Entering Passive Mode (%d,%d,%d,%d,%d,%d).%c%c" : "PORT %d,%d,%d,%d,%d,%d%c%c"),
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ip >> 24,
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(ip >> 16) & 0xFF,
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(ip >> 8) & 0xFF,
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ip & 0xFF,
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(port >> 8) & 0xFF,
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port & 0xFF,
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0x0d, 0x0a
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);
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count = strlen(buf);
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D(bug("ftp_modify_port_command: \"%s\"\r\n", buf ));
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}
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// this should be robust. rather skip it than do anything dangerous.
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void ftp_parse_port_command(
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char *buf,
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uint32 count,
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uint16 &ftp_data_port,
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bool is_pasv
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)
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{
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ftp_data_port = 0;
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if( !count ) return;
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uint8 b[100];
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uint32 ftp_ip = 0;
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// make it a c-string
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if( count >= sizeof(b) ) count = sizeof(b)-1;
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memcpy( b, buf, count );
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b[ count ] = 0;
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for( uint32 i=0; i<count; i++ ) {
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if( b[i] < ' ' || b[i] > 'z' ) {
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b[i] = ' ';
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} else {
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b[i] = tolower(b[i]);
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}
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}
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// D(bug("FTP: \"%s\"\r\n", b ));
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char *s = (char *)b;
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while( *s == ' ' ) s++;
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if(is_pasv) {
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/*
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LOCAL SERVER: ..227 Entering Passive Mode (192,168,0,2,6,236). 0d 0a
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*/
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if( atoi(s) == 227 && strstr(s,"passive") ) {
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while( *s && *s != '(' ) s++;
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if( *s++ == 0 ) s = 0;
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} else {
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s = 0;
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}
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} else {
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/*
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LOCAL CLIENT: PORT 192,168,0,1,14,147 0d 0a
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*/
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if( strncmp(s,"port ",5) == 0 ) {
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s += 5;
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} else {
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s = 0;
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}
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}
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if(s && *s) {
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// get remote ip (used only for verification)
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for( uint32 i=0; i<4; i++ ) {
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while( *s == ' ' ) s++;
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if(!isdigit(*s)) {
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ftp_ip = 0;
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break;
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}
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ftp_ip = (ftp_ip << 8) + atoi(s);
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while( *s && *s != ',' ) s++;
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if(!*s) {
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ftp_ip = 0;
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break;
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}
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s++;
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}
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if(ftp_ip) {
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// get local port
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for( uint32 i=0; i<2; i++ ) {
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while( *s == ' ' ) s++;
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if(!isdigit(*s)) {
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ftp_data_port = 0;
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break;
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}
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ftp_data_port = (ftp_data_port << 8) + atoi(s);
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while( *s && *s != ',' && *s != ')' ) s++;
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if(!*s)
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break;
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else
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s++;
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}
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}
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}
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if(ftp_data_port) {
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D(bug("ftp_parse_port_command: \"%s\"; port is %d\r\n", b, ftp_data_port ));
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}
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}
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