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OSX + ZeroTier SDK

Welcome!

Imagine a flat, encrypted, no-configuration LAN for all of the instances of your OSX app.

Via Traditional Linking (Service and Intercept)

  • This will allow the interception of traditional socket API calls such as socket(), connect(), bind(), etc.

Build against our library:

gcc app.c -o app libztintercept.so
export ZT_NC_NETWORK=/tmp/sdk-test-home/nc_8056c2e21c000001

Start service

./zerotier-sdk-service -d -p8000 /tmp/sdk-test-home &

Run application

./app

Via DYLD_LIBRARY_PATH (Injecting code dynamically at runtime)

As of the release of El Capitan, Apple requires one to turn off System Integrity Protection for code injection from external libraries. This method of intercepting network calls is now deprecated and we are investigating new methods for future releases of the SDK. If you still wish to use this method just export DYLD_LIBRARY_PATH=./path/to/libztintercept.so:$DYLD_LIBRARY_PATH. Also set ZT_NC_NETWORK appropriately.

Via App Framework in XCode

Step 1: Build OSX framework

  • make osx_app_framework
  • This will output to build/osx_app_framework/Release/ZeroTierSDK_OSX.framework

Step 2: Integrate SDK into project

  • Add the resultant framework package to your project
  • Add src directory to Build Settings -> Header Search Paths
  • Add build/osx_app_framework/Release/ to Build Settings -> Framework Search Paths
  • Add ZeroTierSDK.frameworkOSX to General->Embedded Binaries
  • Add src/wrappers/swift/ZTSDK.swift, src/wrappers/swift/XcodeWrapper.cpp, and src/wrappers/swift/XcodeWrapper.hpp to your project:
  • Set src/wrappers/swift/Apple-Bridging-Header.h as your bridging-header in Build Settings -> Objective-C Bridging-header

Step 3: Start the ZeroTier service

Start the service:

    zt.start_service("."); // Where the ZeroTier config files for this app will be stored
    zt.join_network(nwid);

Listen for incoming connections:

    let sock: Int32 = zt.socket(AF_INET, SOCK_STREAM, 0)
    let ztaddr: ZTAddress = ZTAddress(AF_INET, serverAddr, Int16(serverPort))
    let bind_err: Int32 = zt.bind(sock, ztaddr)
    zt_listen(sock, 1);
    let accepted_sock: Int32 = zt.accept(sock, ztaddr)

Or, establish a connection:

    let sock: Int32 = zt.socket(AF_INET, SOCK_STREAM, 0)
    let ztaddr: ZTAddress = ZTAddress(AF_INET, serverAddr, Int16(serverPort))
    let connect_err: Int32 = zt.connect(sock, ztaddr)

Alternative APIs

Click here to learn more about alternative APIs such as the Intercept and SOCKS5 Proxy.