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FtpClient.java
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FtpClient.java
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/*
* Copyright (c) 2009, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.net.ftp.impl;
import java.net.*;
import java.io.*;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.text.DateFormat;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.ArrayList;
import java.util.Base64;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import sun.net.ftp.*;
import sun.util.logging.PlatformLogger;
public class FtpClient extends sun.net.ftp.FtpClient {
private static int defaultSoTimeout;
private static int defaultConnectTimeout;
private static final PlatformLogger logger =
PlatformLogger.getLogger("sun.net.ftp.FtpClient");
private Proxy proxy;
private Socket server;
private PrintStream out;
private InputStream in;
private int readTimeout = -1;
private int connectTimeout = -1;
/* Name of encoding to use for output */
private static String encoding = "ISO8859_1";
/** remember the ftp server name because we may need it */
private InetSocketAddress serverAddr;
private boolean replyPending = false;
private boolean loggedIn = false;
private boolean useCrypto = false;
private SSLSocketFactory sslFact;
private Socket oldSocket;
/** Array of strings (usually 1 entry) for the last reply from the server. */
private Vector<String> serverResponse = new Vector<String>(1);
/** The last reply code from the ftp daemon. */
private FtpReplyCode lastReplyCode = null;
/** Welcome message from the server, if any. */
private String welcomeMsg;
/**
* Only passive mode used in JDK. See Bug 8010784.
*/
private final boolean passiveMode = true;
private TransferType type = TransferType.BINARY;
private long restartOffset = 0;
private long lastTransSize = -1; // -1 means 'unknown size'
private String lastFileName;
/**
* Static members used by the parser
*/
private static String[] patStrings = {
// drwxr-xr-x 1 user01 ftp 512 Jan 29 23:32 prog
"([\\-ld](?:[r\\-][w\\-][x\\-]){3})\\s*\\d+ (\\w+)\\s*(\\w+)\\s*(\\d+)\\s*([A-Z][a-z][a-z]\\s*\\d+)\\s*(\\d\\d:\\d\\d)\\s*(\\p{Print}*)",
// drwxr-xr-x 1 user01 ftp 512 Jan 29 1997 prog
"([\\-ld](?:[r\\-][w\\-][x\\-]){3})\\s*\\d+ (\\w+)\\s*(\\w+)\\s*(\\d+)\\s*([A-Z][a-z][a-z]\\s*\\d+)\\s*(\\d{4})\\s*(\\p{Print}*)",
// 04/28/2006 09:12a 3,563 genBuffer.sh
"(\\d{2}/\\d{2}/\\d{4})\\s*(\\d{2}:\\d{2}[ap])\\s*((?:[0-9,]+)|(?:<DIR>))\\s*(\\p{Graph}*)",
// 01-29-97 11:32PM <DIR> prog
"(\\d{2}-\\d{2}-\\d{2})\\s*(\\d{2}:\\d{2}[AP]M)\\s*((?:[0-9,]+)|(?:<DIR>))\\s*(\\p{Graph}*)"
};
private static int[][] patternGroups = {
// 0 - file, 1 - size, 2 - date, 3 - time, 4 - year, 5 - permissions,
// 6 - user, 7 - group
{7, 4, 5, 6, 0, 1, 2, 3},
{7, 4, 5, 0, 6, 1, 2, 3},
{4, 3, 1, 2, 0, 0, 0, 0},
{4, 3, 1, 2, 0, 0, 0, 0}};
private static Pattern[] patterns;
private static Pattern linkp = Pattern.compile("(\\p{Print}+) \\-\\> (\\p{Print}+)$");
private DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, java.util.Locale.US);
static {
final int vals[] = {0, 0};
@SuppressWarnings("removal")
final String enc = AccessController.doPrivileged(
new PrivilegedAction<String>() {
public String run() {
vals[0] = Integer.getInteger("sun.net.client.defaultReadTimeout", 300_000).intValue();
vals[1] = Integer.getInteger("sun.net.client.defaultConnectTimeout", 300_000).intValue();
return System.getProperty("file.encoding", "ISO8859_1");
}
});
if (vals[0] == 0) {
defaultSoTimeout = -1;
} else {
defaultSoTimeout = vals[0];
}
if (vals[1] == 0) {
defaultConnectTimeout = -1;
} else {
defaultConnectTimeout = vals[1];
}
encoding = enc;
try {
if (!isASCIISuperset(encoding)) {
encoding = "ISO8859_1";
}
} catch (Exception e) {
encoding = "ISO8859_1";
}
patterns = new Pattern[patStrings.length];
for (int i = 0; i < patStrings.length; i++) {
patterns[i] = Pattern.compile(patStrings[i]);
}
}
/**
* Test the named character encoding to verify that it converts ASCII
* characters correctly. We have to use an ASCII based encoding, or else
* the NetworkClients will not work correctly in EBCDIC based systems.
* However, we cannot just use ASCII or ISO8859_1 universally, because in
* Asian locales, non-ASCII characters may be embedded in otherwise
* ASCII based protocols (e.g. HTTP). The specifications (RFC2616, 2398)
* are a little ambiguous in this matter. For instance, RFC2398 [part 2.1]
* says that the HTTP request URI should be escaped using a defined
* mechanism, but there is no way to specify in the escaped string what
* the original character set is. It is not correct to assume that
* UTF-8 is always used (as in URLs in HTML 4.0). For this reason,
* until the specifications are updated to deal with this issue more
* comprehensively, and more importantly, HTTP servers are known to
* support these mechanisms, we will maintain the current behavior
* where it is possible to send non-ASCII characters in their original
* unescaped form.
*/
private static boolean isASCIISuperset(String encoding) throws Exception {
String chkS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"abcdefghijklmnopqrstuvwxyz-_.!~*'();/?:@&=+$,";
// Expected byte sequence for string above
byte[] chkB = {48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70, 71, 72,
73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99,
100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114,
115, 116, 117, 118, 119, 120, 121, 122, 45, 95, 46, 33, 126, 42, 39, 40, 41, 59,
47, 63, 58, 64, 38, 61, 43, 36, 44};
byte[] b = chkS.getBytes(encoding);
return java.util.Arrays.equals(b, chkB);
}
private class DefaultParser implements FtpDirParser {
/**
* Possible patterns:
*
* drwxr-xr-x 1 user01 ftp 512 Jan 29 23:32 prog
* drwxr-xr-x 1 user01 ftp 512 Jan 29 1997 prog
* drwxr-xr-x 1 1 1 512 Jan 29 23:32 prog
* lrwxr-xr-x 1 user01 ftp 512 Jan 29 23:32 prog -> prog2000
* drwxr-xr-x 1 username ftp 512 Jan 29 23:32 prog
* -rw-r--r-- 1 jcc staff 105009 Feb 3 15:05 test.1
*
* 01-29-97 11:32PM <DIR> prog
* 04/28/2006 09:12a 3,563 genBuffer.sh
*
* drwxr-xr-x folder 0 Jan 29 23:32 prog
*
* 0 DIR 01-29-97 23:32 PROG
*/
private DefaultParser() {
}
public FtpDirEntry parseLine(String line) {
String fdate = null;
String fsize = null;
String time = null;
String filename = null;
String permstring = null;
String username = null;
String groupname = null;
boolean dir = false;
Calendar now = Calendar.getInstance();
int year = now.get(Calendar.YEAR);
Matcher m = null;
for (int j = 0; j < patterns.length; j++) {
m = patterns[j].matcher(line);
if (m.find()) {
// 0 - file, 1 - size, 2 - date, 3 - time, 4 - year,
// 5 - permissions, 6 - user, 7 - group
filename = m.group(patternGroups[j][0]);
fsize = m.group(patternGroups[j][1]);
fdate = m.group(patternGroups[j][2]);
if (patternGroups[j][4] > 0) {
fdate += (", " + m.group(patternGroups[j][4]));
} else if (patternGroups[j][3] > 0) {
fdate += (", " + String.valueOf(year));
}
if (patternGroups[j][3] > 0) {
time = m.group(patternGroups[j][3]);
}
if (patternGroups[j][5] > 0) {
permstring = m.group(patternGroups[j][5]);
dir = permstring.startsWith("d");
}
if (patternGroups[j][6] > 0) {
username = m.group(patternGroups[j][6]);
}
if (patternGroups[j][7] > 0) {
groupname = m.group(patternGroups[j][7]);
}
// Old DOS format
if ("<DIR>".equals(fsize)) {
dir = true;
fsize = null;
}
}
}
if (filename != null) {
Date d;
try {
d = df.parse(fdate);
} catch (Exception e) {
d = null;
}
if (d != null && time != null) {
int c = time.indexOf(':');
now.setTime(d);
now.set(Calendar.HOUR, Integer.parseInt(time, 0, c, 10));
now.set(Calendar.MINUTE, Integer.parseInt(time, c + 1, time.length(), 10));
d = now.getTime();
}
// see if it's a symbolic link, i.e. the name if followed
// by a -> and a path
Matcher m2 = linkp.matcher(filename);
if (m2.find()) {
// Keep only the name then
filename = m2.group(1);
}
boolean[][] perms = new boolean[3][3];
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
perms[i][j] = (permstring.charAt((i * 3) + j) != '-');
}
}
FtpDirEntry file = new FtpDirEntry(filename);
file.setUser(username).setGroup(groupname);
file.setSize(Long.parseLong(fsize)).setLastModified(d);
file.setPermissions(perms);
file.setType(dir ? FtpDirEntry.Type.DIR : (line.charAt(0) == 'l' ? FtpDirEntry.Type.LINK : FtpDirEntry.Type.FILE));
return file;
}
return null;
}
}
private static class MLSxParser implements FtpDirParser {
public FtpDirEntry parseLine(String line) {
String name = null;
int i = line.lastIndexOf(';');
if (i > 0) {
name = line.substring(i + 1).trim();
line = line.substring(0, i);
} else {
name = line.trim();
line = "";
}
FtpDirEntry file = new FtpDirEntry(name);
while (!line.isEmpty()) {
String s;
i = line.indexOf(';');
if (i > 0) {
s = line.substring(0, i);
line = line.substring(i + 1);
} else {
s = line;
line = "";
}
i = s.indexOf('=');
if (i > 0) {
String fact = s.substring(0, i);
String value = s.substring(i + 1);
file.addFact(fact, value);
}
}
String s = file.getFact("Size");
if (s != null) {
file.setSize(Long.parseLong(s));
}
s = file.getFact("Modify");
if (s != null) {
Date d = parseRfc3659TimeValue(s);
if (d != null) {
file.setLastModified(d);
}
}
s = file.getFact("Create");
if (s != null) {
Date d = parseRfc3659TimeValue(s);
if (d != null) {
file.setCreated(d);
}
}
s = file.getFact("Type");
if (s != null) {
if (s.equalsIgnoreCase("file")) {
file.setType(FtpDirEntry.Type.FILE);
}
if (s.equalsIgnoreCase("dir")) {
file.setType(FtpDirEntry.Type.DIR);
}
if (s.equalsIgnoreCase("cdir")) {
file.setType(FtpDirEntry.Type.CDIR);
}
if (s.equalsIgnoreCase("pdir")) {
file.setType(FtpDirEntry.Type.PDIR);
}
}
return file;
}
};
private FtpDirParser parser = new DefaultParser();
private FtpDirParser mlsxParser = new MLSxParser();
private static Pattern transPat = null;
private void getTransferSize() {
lastTransSize = -1;
/**
* If it's a start of data transfer response, let's try to extract
* the size from the response string. Usually it looks like that:
*
* 150 Opening BINARY mode data connection for foo (6701 bytes).
*/
String response = getLastResponseString();
if (transPat == null) {
transPat = Pattern.compile("150 Opening .*\\((\\d+) bytes\\).");
}
Matcher m = transPat.matcher(response);
if (m.find()) {
String s = m.group(1);
lastTransSize = Long.parseLong(s);
}
}
/**
* extract the created file name from the response string:
* 226 Transfer complete (unique file name:toto.txt.1).
* Usually happens when a STOU (store unique) command had been issued.
*/
private void getTransferName() {
lastFileName = null;
String response = getLastResponseString();
int i = response.indexOf("unique file name:");
int e = response.lastIndexOf(')');
if (i >= 0) {
i += 17; // Length of "unique file name:"
lastFileName = response.substring(i, e);
}
}
/**
* Pulls the response from the server and returns the code as a
* number. Returns -1 on failure.
*/
private int readServerResponse() throws IOException {
StringBuilder replyBuf = new StringBuilder(32);
int c;
int continuingCode = -1;
int code;
String response;
serverResponse.setSize(0);
while (true) {
while ((c = in.read()) != -1) {
if (c == '\r') {
if ((c = in.read()) != '\n') {
replyBuf.append('\r');
}
}
replyBuf.append((char) c);
if (c == '\n') {
break;
}
}
response = replyBuf.toString();
replyBuf.setLength(0);
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Server [" + serverAddr + "] --> " + response);
}
if (response.isEmpty()) {
code = -1;
} else {
try {
code = Integer.parseInt(response, 0, 3, 10);
} catch (NumberFormatException e) {
code = -1;
} catch (IndexOutOfBoundsException e) {
/* this line doesn't contain a response code, so
we just completely ignore it */
continue;
}
}
serverResponse.addElement(response);
if (continuingCode != -1) {
/* we've seen a ###- sequence */
if (code != continuingCode ||
(response.length() >= 4 && response.charAt(3) == '-')) {
continue;
} else {
/* seen the end of code sequence */
continuingCode = -1;
break;
}
} else if (response.length() >= 4 && response.charAt(3) == '-') {
continuingCode = code;
continue;
} else {
break;
}
}
return code;
}
/** Sends command <i>cmd</i> to the server. */
private void sendServer(String cmd) {
out.print(cmd);
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Server [" + serverAddr + "] <-- " + cmd);
}
}
/** converts the server response into a string. */
private String getResponseString() {
return serverResponse.elementAt(0);
}
/** Returns all server response strings. */
private Vector<String> getResponseStrings() {
return serverResponse;
}
/**
* Read the reply from the FTP server.
*
* @return <code>true</code> if the command was successful
* @throws IOException if an error occurred
*/
private boolean readReply() throws IOException {
lastReplyCode = FtpReplyCode.find(readServerResponse());
if (lastReplyCode.isPositivePreliminary()) {
replyPending = true;
return true;
}
if (lastReplyCode.isPositiveCompletion() || lastReplyCode.isPositiveIntermediate()) {
if (lastReplyCode == FtpReplyCode.CLOSING_DATA_CONNECTION) {
getTransferName();
}
return true;
}
return false;
}
/**
* Sends a command to the FTP server and returns the error code
* (which can be a "success") sent by the server.
*
* @param cmd
* @return <code>true</code> if the command was successful
* @throws IOException
*/
private boolean issueCommand(String cmd) throws IOException,
sun.net.ftp.FtpProtocolException {
if (!isConnected()) {
throw new IllegalStateException("Not connected");
}
if (replyPending) {
try {
completePending();
} catch (sun.net.ftp.FtpProtocolException e) {
// ignore...
}
}
if (cmd.indexOf('\n') != -1) {
sun.net.ftp.FtpProtocolException ex
= new sun.net.ftp.FtpProtocolException("Illegal FTP command");
ex.initCause(new IllegalArgumentException("Illegal carriage return"));
throw ex;
}
sendServer(cmd + "\r\n");
return readReply();
}
/**
* Send a command to the FTP server and check for success.
*
* @param cmd String containing the command
*
* @throws FtpProtocolException if an error occurred
*/
private void issueCommandCheck(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
if (!issueCommand(cmd)) {
throw new sun.net.ftp.FtpProtocolException(cmd + ":" + getResponseString(), getLastReplyCode());
}
}
private static Pattern epsvPat = null;
private static Pattern pasvPat = null;
/**
* Opens a "PASSIVE" connection with the server and returns the connected
* <code>Socket</code>.
*
* @return the connected <code>Socket</code>
* @throws IOException if the connection was unsuccessful.
*/
private Socket openPassiveDataConnection(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
String serverAnswer;
int port;
InetSocketAddress dest = null;
/**
* Here is the idea:
*
* - First we want to try the new (and IPv6 compatible) EPSV command
* But since we want to be nice with NAT software, we'll issue the
* EPSV ALL command first.
* EPSV is documented in RFC2428
* - If EPSV fails, then we fall back to the older, yet ok, PASV
* - If PASV fails as well, then we throw an exception and the calling
* method will have to try the EPRT or PORT command
*/
if (issueCommand("EPSV ALL")) {
// We can safely use EPSV commands
issueCommandCheck("EPSV");
serverAnswer = getResponseString();
// The response string from a EPSV command will contain the port number
// the format will be :
// 229 Entering Extended PASSIVE Mode (|||58210|)
//
// So we'll use the regular expresions package to parse the output.
if (epsvPat == null) {
epsvPat = Pattern.compile("^229 .* \\(\\|\\|\\|(\\d+)\\|\\)");
}
Matcher m = epsvPat.matcher(serverAnswer);
if (!m.find()) {
throw new sun.net.ftp.FtpProtocolException("EPSV failed : " + serverAnswer);
}
// Yay! Let's extract the port number
String s = m.group(1);
port = Integer.parseInt(s);
InetAddress add = server.getInetAddress();
if (add != null) {
dest = new InetSocketAddress(add, port);
} else {
// This means we used an Unresolved address to connect in
// the first place. Most likely because the proxy is doing
// the name resolution for us, so let's keep using unresolved
// address.
dest = InetSocketAddress.createUnresolved(serverAddr.getHostName(), port);
}
} else {
// EPSV ALL failed, so Let's try the regular PASV cmd
issueCommandCheck("PASV");
serverAnswer = getResponseString();
// Let's parse the response String to get the IP & port to connect
// to. The String should be in the following format :
//
// 227 Entering PASSIVE Mode (A1,A2,A3,A4,p1,p2)
//
// Note that the two parenthesis are optional
//
// The IP address is A1.A2.A3.A4 and the port is p1 * 256 + p2
//
// The regular expression is a bit more complex this time, because
// the parenthesis are optionals and we have to use 3 groups.
if (pasvPat == null) {
pasvPat = Pattern.compile("227 .* \\(?(\\d{1,3},\\d{1,3},\\d{1,3},\\d{1,3}),(\\d{1,3}),(\\d{1,3})\\)?");
}
Matcher m = pasvPat.matcher(serverAnswer);
if (!m.find()) {
throw new sun.net.ftp.FtpProtocolException("PASV failed : " + serverAnswer);
}
// Get port number out of group 2 & 3
port = Integer.parseInt(m.group(3)) + (Integer.parseInt(m.group(2)) << 8);
// IP address is simple
String s = m.group(1).replace(',', '.');
dest = new InetSocketAddress(s, port);
}
// Got everything, let's open the socket!
Socket s;
if (proxy != null) {
if (proxy.type() == Proxy.Type.SOCKS) {
PrivilegedAction<Socket> pa = () -> new Socket(proxy);
@SuppressWarnings("removal")
var tmp = AccessController.doPrivileged(pa);
s = tmp;
} else {
s = new Socket(Proxy.NO_PROXY);
}
} else {
s = new Socket();
}
PrivilegedAction<InetAddress> pa = () -> server.getLocalAddress();
@SuppressWarnings("removal")
InetAddress serverAddress = AccessController.doPrivileged(pa);
// Bind the socket to the same address as the control channel. This
// is needed in case of multi-homed systems.
s.bind(new InetSocketAddress(serverAddress, 0));
if (connectTimeout >= 0) {
s.connect(dest, connectTimeout);
} else {
if (defaultConnectTimeout > 0) {
s.connect(dest, defaultConnectTimeout);
} else {
s.connect(dest);
}
}
if (readTimeout >= 0) {
s.setSoTimeout(readTimeout);
} else if (defaultSoTimeout > 0) {
s.setSoTimeout(defaultSoTimeout);
}
if (useCrypto) {
try {
s = sslFact.createSocket(s, dest.getHostName(), dest.getPort(), true);
} catch (Exception e) {
throw new sun.net.ftp.FtpProtocolException("Can't open secure data channel: " + e);
}
}
if (!issueCommand(cmd)) {
s.close();
if (getLastReplyCode() == FtpReplyCode.FILE_UNAVAILABLE) {
// Ensure backward compatibility
throw new FileNotFoundException(cmd);
}
throw new sun.net.ftp.FtpProtocolException(cmd + ":" + getResponseString(), getLastReplyCode());
}
return s;
}
/**
* Opens a data connection with the server according to the set mode
* (ACTIVE or PASSIVE) then send the command passed as an argument.
*
* @param cmd the <code>String</code> containing the command to execute
* @return the connected <code>Socket</code>
* @throws IOException if the connection or command failed
*/
private Socket openDataConnection(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
Socket clientSocket;
if (passiveMode) {
try {
return openPassiveDataConnection(cmd);
} catch (sun.net.ftp.FtpProtocolException e) {
// If Passive mode failed, fall back on PORT
// Otherwise throw exception
String errmsg = e.getMessage();
if (!errmsg.startsWith("PASV") && !errmsg.startsWith("EPSV")) {
throw e;
}
}
}
ServerSocket portSocket;
InetAddress myAddress;
String portCmd;
if (proxy != null && proxy.type() == Proxy.Type.SOCKS) {
// We're behind a firewall and the passive mode fail,
// since we can't accept a connection through SOCKS (yet)
// throw an exception
throw new sun.net.ftp.FtpProtocolException("Passive mode failed");
}
// Bind the ServerSocket to the same address as the control channel
// This is needed for multi-homed systems
portSocket = new ServerSocket(0, 1, server.getLocalAddress());
try {
myAddress = portSocket.getInetAddress();
if (myAddress.isAnyLocalAddress()) {
myAddress = server.getLocalAddress();
}
// Let's try the new, IPv6 compatible EPRT command
// See RFC2428 for specifics
// Some FTP servers (like the one on Solaris) are bugged, they
// will accept the EPRT command but then, the subsequent command
// (e.g. RETR) will fail, so we have to check BOTH results (the
// EPRT cmd then the actual command) to decide whether we should
// fall back on the older PORT command.
portCmd = "EPRT |" + ((myAddress instanceof Inet6Address) ? "2" : "1") + "|" +
myAddress.getHostAddress() + "|" + portSocket.getLocalPort() + "|";
if (!issueCommand(portCmd) || !issueCommand(cmd)) {
// The EPRT command failed, let's fall back to good old PORT
portCmd = "PORT ";
byte[] addr = myAddress.getAddress();
/* append host addr */
for (int i = 0; i < addr.length; i++) {
portCmd = portCmd + (addr[i] & 0xFF) + ",";
}
/* append port number */
portCmd = portCmd + ((portSocket.getLocalPort() >>> 8) & 0xff) + "," + (portSocket.getLocalPort() & 0xff);
issueCommandCheck(portCmd);
issueCommandCheck(cmd);
}
// Either the EPRT or the PORT command was successful
// Let's create the client socket
if (connectTimeout >= 0) {
portSocket.setSoTimeout(connectTimeout);
} else {
if (defaultConnectTimeout > 0) {
portSocket.setSoTimeout(defaultConnectTimeout);
}
}
clientSocket = portSocket.accept();
if (readTimeout >= 0) {
clientSocket.setSoTimeout(readTimeout);
} else {
if (defaultSoTimeout > 0) {
clientSocket.setSoTimeout(defaultSoTimeout);
}
}
} finally {
portSocket.close();
}
if (useCrypto) {
try {
clientSocket = sslFact.createSocket(clientSocket, serverAddr.getHostName(), serverAddr.getPort(), true);
} catch (Exception ex) {
throw new IOException(ex.getLocalizedMessage());
}
}
return clientSocket;
}
private InputStream createInputStream(InputStream in) {
if (type == TransferType.ASCII) {
return new sun.net.TelnetInputStream(in, false);
}
return in;
}
private OutputStream createOutputStream(OutputStream out) {
if (type == TransferType.ASCII) {
return new sun.net.TelnetOutputStream(out, false);
}
return out;
}
/**
* Creates an instance of FtpClient. The client is not connected to any
* server yet.
*
*/
protected FtpClient() {
}
/**
* Creates an instance of FtpClient. The client is not connected to any
* server yet.
*
*/
public static sun.net.ftp.FtpClient create() {
return new FtpClient();
}
/**
* Set the transfer mode to <I>passive</I>. In that mode, data connections
* are established by having the client connect to the server.
* This is the recommended default mode as it will work best through
* firewalls and NATs.
*
* @return This FtpClient
* @see #setActiveMode()
*/
public sun.net.ftp.FtpClient enablePassiveMode(boolean passive) {
// Only passive mode used in JDK. See Bug 8010784.
// passiveMode = passive;
return this;
}
/**
* Gets the current transfer mode.
*
* @return the current <code>FtpTransferMode</code>
*/
public boolean isPassiveModeEnabled() {
return passiveMode;
}
/**
* Sets the timeout value to use when connecting to the server,
*
* @param timeout the timeout value, in milliseconds, to use for the connect
* operation. A value of zero or less, means use the default timeout.
*
* @return This FtpClient
*/
public sun.net.ftp.FtpClient setConnectTimeout(int timeout) {
connectTimeout = timeout;
return this;
}
/**
* Returns the current connection timeout value.
*
* @return the value, in milliseconds, of the current connect timeout.
* @see #setConnectTimeout(int)
*/
public int getConnectTimeout() {
return connectTimeout;
}
/**
* Sets the timeout value to use when reading from the server,
*
* @param timeout the timeout value, in milliseconds, to use for the read
* operation. A value of zero or less, means use the default timeout.
* @return This FtpClient
*/
public sun.net.ftp.FtpClient setReadTimeout(int timeout) {
readTimeout = timeout;
return this;
}
/**
* Returns the current read timeout value.
*
* @return the value, in milliseconds, of the current read timeout.
* @see #setReadTimeout(int)
*/
public int getReadTimeout() {
return readTimeout;
}
public sun.net.ftp.FtpClient setProxy(Proxy p) {
proxy = p;
return this;
}
/**
* Get the proxy of this FtpClient
*
* @return the <code>Proxy</code>, this client is using, or <code>null</code>
* if none is used.
* @see #setProxy(Proxy)
*/
public Proxy getProxy() {
return proxy;
}
/**
* Connects to the specified destination.
*
* @param dest the <code>InetSocketAddress</code> to connect to.
* @throws IOException if the connection fails.
*/
private void tryConnect(InetSocketAddress dest, int timeout) throws IOException {
if (isConnected()) {
disconnect();
}
server = doConnect(dest, timeout);
try {
out = new PrintStream(new BufferedOutputStream(server.getOutputStream()),
true, encoding);
} catch (UnsupportedEncodingException e) {
throw new InternalError(encoding + "encoding not found", e);
}
in = new BufferedInputStream(server.getInputStream());
}
private Socket doConnect(InetSocketAddress dest, int timeout) throws IOException {
Socket s;
if (proxy != null) {
if (proxy.type() == Proxy.Type.SOCKS) {
PrivilegedAction<Socket> pa = () -> new Socket(proxy);
@SuppressWarnings("removal")
var tmp = AccessController.doPrivileged(pa);
s = tmp;
} else {
s = new Socket(Proxy.NO_PROXY);
}
} else {
s = new Socket();
}
// Instance specific timeouts do have priority, that means
// connectTimeout & readTimeout (-1 means not set)
// Then global default timeouts
// Then no timeout.
if (timeout >= 0) {
s.connect(dest, timeout);
} else {
if (connectTimeout >= 0) {
s.connect(dest, connectTimeout);
} else {
if (defaultConnectTimeout > 0) {
s.connect(dest, defaultConnectTimeout);
} else {
s.connect(dest);
}
}
}
if (readTimeout >= 0) {
s.setSoTimeout(readTimeout);
} else if (defaultSoTimeout > 0) {
s.setSoTimeout(defaultSoTimeout);
}
return s;
}
private void disconnect() throws IOException {
if (isConnected()) {
server.close();
}
server = null;
in = null;
out = null;
lastTransSize = -1;
lastFileName = null;
restartOffset = 0;
welcomeMsg = null;
lastReplyCode = null;
serverResponse.setSize(0);
}
/**
* Tests whether this client is connected or not to a server.
*
* @return <code>true</code> if the client is connected.
*/
public boolean isConnected() {
return server != null;
}
public SocketAddress getServerAddress() {
return server == null ? null : server.getRemoteSocketAddress();
}
public sun.net.ftp.FtpClient connect(SocketAddress dest) throws sun.net.ftp.FtpProtocolException, IOException {
return connect(dest, -1);
}
/**
* Connects the FtpClient to the specified destination.
*
* @param dest the address of the destination server
* @throws IOException if connection failed.
*/
public sun.net.ftp.FtpClient connect(SocketAddress dest, int timeout) throws sun.net.ftp.FtpProtocolException, IOException {
if (!(dest instanceof InetSocketAddress)) {
throw new IllegalArgumentException("Wrong address type");
}
serverAddr = (InetSocketAddress) dest;
tryConnect(serverAddr, timeout);
if (!readReply()) {
throw new sun.net.ftp.FtpProtocolException("Welcome message: " +
getResponseString(), lastReplyCode);
}
welcomeMsg = getResponseString().substring(4);