libzt

Library version of ZeroTier

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libzt makes it easy to securely connect devices, servers, cloud VMs, containers, and apps everywhere and manage them at scale. We provide a socket-like API supporting SOCK_STREAM, SOCK_DGRAM, and SOCK_RAW. There's no need for system-wide virtual interfaces. This connection is exclusive to your app and fully encrypted via the Salsa20 cipher. For a more in-depth discussion on the technical side of ZeroTier, check out our Manual

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• Pre-built library binaries can be found at: zerotier.com/download.shtml
• Bindings for popular languages like Scala, Swift, Java, Python, etc. can be found here

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C++ Example

#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>

#include "libzt.h"

int main() 
{
	char *str = "welcome to the machine";
	char *remoteIp = "10.8.8.42";
	int remotePort = 8080;
	int fd, err = 0;
	struct sockaddr_in addr;
	addr.sin_family = AF_INET;
	addr.sin_addr.s_addr = inet_addr(remoteIp);
	addr.sin_port = htons(remotePort);

	zts_startjoin("path", 0xc7cd7c981b0f52a2); // config path, network ID

	if ((fd = zts_socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		printf("error creating socket\n");
	}
	if ((err = zts_connect(fd, (const struct sockaddr *)&addr, sizeof(addr))) < 0) {
		printf("error connecting to remote host\n");
	}
	if ((err = zts_write(fd, str, strlen(str))) < 0) {
		printf("error writing to socket\n");
	}

	zts_close(fd);
	zts_stop();
	return 0;
}

For an example using only the Virtual Layer 2, see examples/layer2

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Build

We recommend using CMake and clang.

git submodule init
git submodule update
make patch
cmake -H. -Bbuild
cmake --build build --config Release 

Builds are placed in bin\lib. Use --config Debug for a build with debug info included.

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Commercial License

If you want a commercial license to use libzt in your product contact us directly via contact@zerotier.com