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This commit is contained in:
Joseph Henry
2018-07-19 17:35:42 -07:00
parent 71fe3c867e
commit 60549bc8a3
74 changed files with 785 additions and 831 deletions
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examples/java/ExampleApp.java Normal file
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/*
* ZeroTier SDK - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
// Simple Java example for libzt using JNI
import zerotier.*;
import java.net.*;
import java.lang.Thread;
public class ExampleApp {
public native int loadsymbols();
public native void startOneService();
static { System.loadLibrary("zt"); } // load libzt.dylib or libzt.so
static void sleep(int ms)
{
try { Thread.sleep(ms); }
catch (InterruptedException e) { e.printStackTrace(); }
}
public static void main(String[] args)
{
final ZeroTier libzt = new ZeroTier();
new Thread(new Runnable()
{
public void run()
{
String path = "/Users/joseph/op/zt/libzt/ztjni"; // Where node's config files are stored
long nwid = 0xf0b9acf0833f4b071L;
// Test modes
boolean blocking_start_call = true;
boolean client_mode = false;
boolean tcp = false;
boolean loop = true; // RX/TX multiple times
boolean idle = false; // Idle loop after node comes online. For testing reachability
int fd = -1, client_fd = -1, err, r, w, lengthToRead = 0, flags = 0;
byte[] rxBuffer;
byte[] txBuffer = "welcome to the machine".getBytes();
String remoteAddrStr = "11.7.7.107";
String localAddrStr = "0.0.0.0";
int portNo = 4040;
ZTSocketAddress remoteAddr, localAddr;
ZTSocketAddress sockname = new ZTSocketAddress();
ZTSocketAddress addr = new ZTSocketAddress();
// METHOD 1 (easy)
// Blocking call that waits for all components of the service to start
System.out.println("Starting ZT service...");
if (blocking_start_call) {
libzt.startjoin(path, nwid);
}
// METHOD 2
// Optional. Non-blocking call to start service. You'll have to use the below process to determine
// when you are allowed to start making socket calls.
if (!blocking_start_call) {
libzt.start(path, true);
while(!libzt.ready()) {
try { // Wait for core service to start
Thread.sleep(250);
}
catch(InterruptedException ex) {
Thread.currentThread().interrupt();
}
}
System.out.println("Core started. Networks can be joined after this point");
libzt.join(nwid);
// Wait for userspace stack to start, we trigger this by joining a network
while(!libzt.stack_running()) {
try {
Thread.sleep(1000);
}
catch(InterruptedException ex) {
Thread.currentThread().interrupt();
}
}
}
System.out.println("ZT service ready.");
// Device/Node address info
System.out.println("path=" + libzt.get_path());
System.out.println("nodeId=" + Long.toHexString(libzt.get_node_id()));
int numAddresses = libzt.get_num_assigned_addresses(nwid);
System.out.println("this node has (" + numAddresses + ") assigned addresses on network " + Long.toHexString(nwid));
for (int i=0; i<numAddresses; i++) {
libzt.get_address_at_index(nwid, i, sockname);
//System.out.println("address[" + i + "] = " + sockname.toString()); // ip:port
System.out.println("address[" + i + "] = " + sockname.toCIDR());
}
// Idle loop test
while(idle) { try { Thread.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); } }
// TCP
if (tcp) {
System.out.println("mode:tcp");
if ((fd = libzt.socket(libzt.AF_INET, libzt.SOCK_STREAM, 0)) < 0) {
System.out.println("error creating socket");
return;
}
// CLIENT
if (client_mode) {
System.out.println("mode:client");
remoteAddr = new ZTSocketAddress(remoteAddrStr, portNo);
if ((err = libzt.connect(fd, remoteAddr)) < 0) {
System.out.println("error connecting (err=" + err + ")");
return;
}
String echo_msg = "echo!";
w = libzt.write(fd, echo_msg.getBytes(), echo_msg.length());
rxBuffer = new byte[100];
lengthToRead = 100;
System.out.println("reading bytes...");
r = libzt.read(fd, rxBuffer, lengthToRead);
System.out.println("r="+r);
System.out.println("string="+new String(rxBuffer));
}
// SERVER
if (!client_mode) {
System.out.println("mode:server");
localAddr = new ZTSocketAddress(localAddrStr, portNo);
if ((err = libzt.bind(fd, localAddr)) < 0) {
System.out.println("error binding socket to virtual interface");
return;
} if ((err = libzt.listen(fd, 1)) < 0) {
System.out.println("error putting socket into listening state");
return;
}
remoteAddr = new ZTSocketAddress(localAddrStr, 0);
client_fd = -1;
if ((client_fd = libzt.accept(fd, remoteAddr)) < 0) {
System.out.println("error accepting incoming connection (err=" + client_fd + ")");
return;
}
System.out.println("accepted connection (client_fd=" + client_fd + ")");
rxBuffer = new byte[100];
lengthToRead = 100;
System.out.println("reading bytes...");
r = libzt.read(client_fd, rxBuffer, lengthToRead);
System.out.println("r="+r);
System.out.println("string="+new String(rxBuffer));
System.out.println("writing bytes...");
String echo_msg = "echo!";
w = libzt.write(client_fd, echo_msg.getBytes(), echo_msg.length());
System.out.println("wrote (" + w + ") bytes");
}
}
// UDP
if (!tcp) {
System.out.println("mode:udp");
if ((fd = libzt.socket(libzt.AF_INET, libzt.SOCK_DGRAM, 0)) < 0) {
System.out.println("error creating socket");
return;
}
// CLIENT
if (client_mode) {
System.out.println("mode:client");
localAddr = new ZTSocketAddress(localAddrStr, portNo);
if ((err = libzt.bind(fd, localAddr)) < 0) {
System.out.println("error binding socket to virtual interface");
return;
}
remoteAddr = new ZTSocketAddress(remoteAddrStr, portNo);
System.out.println("sending message to: " + remoteAddr.toString());
if (loop) {
while (true) {
sleep(500);
if ((w = libzt.sendto(fd, txBuffer, txBuffer.length, flags, remoteAddr)) < 0) {
System.out.println("error sending bytes");
} else {
System.out.println("sendto()=" + w);
}
}
} else {
if ((w = libzt.sendto(fd, txBuffer, txBuffer.length, flags, remoteAddr)) < 0) {
System.out.println("error sending bytes");
} else {
System.out.println("sendto()=" + w);
}
}
}
// SERVER
if (!client_mode) {
System.out.println("mode:server");
localAddr = new ZTSocketAddress(localAddrStr, portNo);
System.out.println("binding to " + localAddr.toString());
if ((err = libzt.bind(fd, localAddr)) < 0) {
System.out.println("error binding socket to virtual interface");
return;
}
rxBuffer = new byte[100];
remoteAddr = new ZTSocketAddress("-1.-1.-1.-1", 0);
while(true) {
addr = new ZTSocketAddress();
r = libzt.recvfrom(fd, rxBuffer, rxBuffer.length, flags, remoteAddr);
System.out.println("read (" + r + ") bytes from " + remoteAddr.toString() + ", buffer = " + new String(rxBuffer));
}
}
}
libzt.close(client_fd);
libzt.close(fd);
}
}).start();
while(true)
{
try { Thread.sleep(3000); }
catch (InterruptedException e) { e.printStackTrace(); }
}
}
}

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OSTYPE=$(shell uname -s | tr '[A-Z]' '[a-z]')
BUILD=build/$(OSTYPE)
ifeq ($(OSTYPE),darwin)
SHARED_LIB=libzt.dylib
endif
ifeq ($(OSTYPE),linux)
SHARED_LIB=libzt.so
endif
example_java_app:
javac *.java
example_java_app_1.6:
javac -source 1.6 -bootclasspath /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.41.x86_64/jre/lib/rt.jar -target 1.6 *.java
copy_dynamic_lib:
cp ../../bin/lib/$(SHARED_LIB) .
jar:
jar cf libzt.jar libzt.dylib zerotier/ZeroTier.class
clean:
-rm -rf *.jar *.dylib *.so
-find . -type f \( -name '*.class' \) -delete

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## ZeroTier with Java via JNI
***
### Example App
- From libzt main directory, build shared library: `make shared_jni_lib`
- Copy the resultant dynamic library (`*.so` or `*.dylib`) from `build/` to this current directory
- Change to this directory and `make example_java_app`
- Run: `java -cp "." ExampleApp`
### JAR file (with embedded C++ dynamic library)
```
make example_java_app
make copy_dynamic_lib
make jar
```
Notes:
Upon execution, it will load the libzt dynamic library via the `loadLibrary` method and begin generating an identity.
***
More resources on JNI usage:
http://journals.ecs.soton.ac.uk/java/tutorial/native1.1/implementing/index.html

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examples/java/zerotier/ZTFD.java Normal file
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/*
* ZeroTier SDK - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
package zerotier;
public class fd_set
{
byte[] fds_bits[1024 / 8];
}

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examples/java/zerotier/ZTSocketAddress.java Normal file
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/*
* ZeroTier SDK - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
package zerotier;
import java.net.*;
// Designed to transport address information across the JNI boundary
public class ZTSocketAddress
{
public byte[] _ip6 = new byte[16];
public byte[] _ip4 = new byte[4];
public long _ipdata;
public long _ipdata_ext;
public int _family;
public int _port; // Also reused for netmask or prefix
public ZTSocketAddress() {}
public ZTSocketAddress(String ipStr, int port)
{
if(ipStr.contains(":")) {
_family = zerotier.ZeroTier.AF_INET6;
try {
InetAddress ip = InetAddress.getByName(ipStr);
_ip6 = ip.getAddress();
}
catch (Exception e) { }
}
else if(ipStr.contains(".")) {
_family = zerotier.ZeroTier.AF_INET;
try {
InetAddress ip = InetAddress.getByName(ipStr);
_ip4 = ip.getAddress();
}
catch (Exception e) { }
}
_port = port;
}
public int getPort() { return _port; }
public int getNetmask() { return _port; }
public int getPrefix() { return _port; }
private String ipString()
{
if (_family == zerotier.ZeroTier.AF_INET) {
try {
InetAddress inet = InetAddress.getByAddress(_ip4);
return "" + inet.getHostAddress();
} catch (Exception e) {
System.out.println(e);
}
}
if (_family == zerotier.ZeroTier.AF_INET6) {
try {
InetAddress inet = InetAddress.getByAddress(_ip6);
return "" + inet.getHostAddress();
} catch (Exception e) {
System.out.println(e);
}
}
return "";
}
public String toString() { return ipString() + ":" + _port; }
public String toCIDR() { return ipString() + "/" + _port; }
}

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examples/java/zerotier/ZeroTier.java Normal file
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/*
* ZeroTier SDK - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
package zerotier;
import java.net.*;
public class ZeroTier {
public static int AF_INET = 2;
public static int AF_INET6 = 30;
public static int SOCK_STREAM = 1;
public static int SOCK_DGRAM = 2;
public static int O_APPEND = 1024;
public static int O_NONBLOCK = 2048;
public static int O_ASYNC = 8192;
public static int O_DIRECT = 65536;
public static int O_NOATIME = 262144;
public static int F_GETFL = 3;
public static int F_SETFL = 4;
public native void start(String homePath, boolean blocking);
public native void startjoin(String homePath, long nwid);
public native void stop();
public native boolean core_running();
public native boolean stack_running();
public native boolean ready();
public native int join(long nwid);
public native int leave(long nwid);
public native String get_path();
public native long get_node_id();
public native int get_num_assigned_addresses(long nwid);
public native boolean get_address_at_index(long nwid, int index, ZTSocketAddress addr);
public native boolean has_address(long nwid);
public native boolean get_address(long nwid, int address_family, ZTSocketAddress addr);
public native void get_6plane_addr();
public native void get_rfc4193_addr();
public native int socket(int family, int type, int protocol);
public native int connect(int fd, ZTSocketAddress addr);
public native int bind(int fd, ZTSocketAddress addr);
public native int listen(int fd, int backlog);
public native int accept(int fd, ZTSocketAddress addr);
public native int accept4(int fd, String addr, int port);
public native int close(int fd);
public native int setsockopt(int fd, int level, int optname, int optval, int optlen);
public native int getsockopt(int fd, int level, int optname, int optval, int optlen);
public native int sendto(int fd, byte[] buf, int len, int flags, ZTSocketAddress addr);
public native int send(int fd, byte[] buf, int len, int flags);
public native int recv(int fd, byte[] buf, int len, int flags);
public native int recvfrom(int fd, byte[] buf, int len, int flags, ZTSocketAddress addr);
public native int read(int fd, byte[] buf, int len);
public native int write(int fd, byte[] buf, int len);
public native int shutdown(int fd, int how);
public native boolean getsockname(int fd, ZTSocketAddress addr);
public native int getpeername(int fd, ZTSocketAddress addr);
public native int fcntl(int sock, int cmd, int flag);
}