org.quietmodem.Quiet | Quiet for Android - TCP over sound

org.quietmodem.Quiet is a C library. org.quietmodem.Quiet has no bugs, it has no vulnerabilities and it has medium support. You can download it from GitHub.

Quiet can be used either as a raw frame layer or in UDP/TCP mode. For the latter, it provides the [lwIP TCP stack] which operates entirely independently from the stack provided by Android. Make sure to have the [Android NDK] installed and set the location of it at ndk.dir in local.properties. This is necessary to build the JNI wrapper included in this project. If we want to do interactions between two devices, or if we’d like retransmits and automatic data segmentation, then TCP is the way to go. First we build a new NetworkInterface. This example omits an IP address and netmask from NetworkInterfaceConfig() which tells Quiet to create an Auto IP. This will automatically assign our interface an address, although it does take several seconds to probe and settle on an address once we instantiate the interface. If we’re using Quiet in an ad-hoc manner, we’ll need to discover any peers nearby. We can do this by using a broadcast UDP packet. On each side we might run something like this.