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/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#include "FtpConnection.h"
#include "Util.h"
#include "DlAbortEx.h"
#include "DlRetryEx.h"
#include "message.h"
#include "prefs.h"
FtpConnection::FtpConnection(int cuid, const Socket* socket, const Request* req, const Option* op, const Logger* logger):cuid(cuid), socket(socket), req(req), option(op), logger(logger) {}
FtpConnection::~FtpConnection() {}
void FtpConnection::sendUser() const {
string request = "USER "+option->get(PREF_FTP_USER)+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
void FtpConnection::sendPass() const {
string request = "PASS "+option->get(PREF_FTP_PASSWD)+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, "PASS ********");
socket->writeData(request);
}
void FtpConnection::sendType() const {
string type;
if(option->get(PREF_FTP_TYPE) == V_ASCII) {
type = "A";
} else {
type = "I";
}
string request = "TYPE "+type+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
void FtpConnection::sendCwd() const {
string request = "CWD "+req->getDir()+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
void FtpConnection::sendSize() const {
string request = "SIZE "+req->getFile()+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
void FtpConnection::sendPasv() const {
string request = "PASV\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
Socket* FtpConnection::sendPort() const {
Socket* serverSocket = new Socket();
try {
serverSocket->beginListen();
pair<string, int> addrinfo;
socket->getAddrInfo(addrinfo);
int ipaddr[4];
sscanf(addrinfo.first.c_str(), "%d.%d.%d.%d",
&ipaddr[0], &ipaddr[1], &ipaddr[2], &ipaddr[3]);
serverSocket->getAddrInfo(addrinfo);
string request = "PORT "+
Util::itos(ipaddr[0])+","+Util::itos(ipaddr[1])+","+
Util::itos(ipaddr[2])+","+Util::itos(ipaddr[3])+","+
Util::itos(addrinfo.second/256)+","+Util::itos(addrinfo.second%256)+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
} catch (Exception* ex) {
delete serverSocket;
throw;
}
return serverSocket;
}
void FtpConnection::sendRest(const Segment& segment) const {
string request = "REST "+Util::llitos(segment.sp+segment.ds)+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
void FtpConnection::sendRetr() const {
string request = "RETR "+req->getFile()+"\r\n";
logger->info(MSG_SENDING_REQUEST, cuid, request.c_str());
socket->writeData(request);
}
int FtpConnection::getStatus(string response) const {
int status;
// When the response is not like "%d %*s",
// we return 0.
if(response.find_first_not_of("0123456789") != 3
|| !(response.find(" ") == 3 || response.find("-") == 3)) {
return 0;
}
if(sscanf(response.c_str(), "%d %*s", &status) == 1) {
return status;
} else {
return 0;
}
}
bool FtpConnection::isEndOfResponse(int status, string response) const {
if(response.size() <= 4) {
return false;
}
// if forth character of buf is '-', then multi line response is expected.
if(response.at(3) == '-') {
// multi line response
string::size_type p;
p = response.find("\r\n"+Util::itos(status)+" ");
if(p == string::npos) {
return false;
}
}
if(Util::endsWith(response, "\r\n")) {
return true;
} else {
return false;
}
}
bool FtpConnection::bulkReceiveResponse(pair<int, string>& response) {
char buf[1024];
while(socket->isReadable(0)) {
int size = sizeof(buf)-1;
socket->readData(buf, size);
buf[size] = '\0';
strbuf += buf;
}
int status;
if(strbuf.size() >= 4) {
status = getStatus(strbuf);
if(status == 0) {
throw new DlRetryEx(EX_INVALID_RESPONSE);
}
} else {
return false;
}
if(isEndOfResponse(status, strbuf)) {
logger->info(MSG_RECEIVE_RESPONSE, cuid, strbuf.c_str());
response.first = status;
response.second = strbuf;
strbuf.erase();
return true;
} else {
// didn't receive response fully.
return false;
}
}
int FtpConnection::receiveResponse() {
pair<int, string> response;
if(bulkReceiveResponse(response)) {
return response.first;
} else {
return 0;
}
}
int FtpConnection::receiveSizeResponse(long long int& size) {
pair<int, string> response;
if(bulkReceiveResponse(response)) {
if(response.first == 213) {
sscanf(response.second.c_str(), "%*d %Ld", &size);
}
return response.first;
} else {
return 0;
}
}
int FtpConnection::receivePasvResponse(pair<string, int>& dest) {
pair<int, string> response;
if(bulkReceiveResponse(response)) {
if(response.first == 227) {
// we assume the format of response is "227 Entering Passive Mode (h1,h2,h3,h4,p1,p2)."
int h1, h2, h3, h4, p1, p2;
string::size_type p = response.second.find("(");
if(p >= 4) {
sscanf(response.second.substr(response.second.find("(")).c_str(),
"(%d,%d,%d,%d,%d,%d).",
&h1, &h2, &h3, &h4, &p1, &p2);
// ip address
dest.first = Util::itos(h1)+"."+Util::itos(h2)+"."+Util::itos(h3)+"."+Util::itos(h4);
// port number
dest.second = 256*p1+p2;
} else {
throw new DlRetryEx(EX_INVALID_RESPONSE);
}
}
return response.first;
} else {
return 0;
}
}
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