Automatic Multicast Tunneling (AMT)

A Golang implementation of the Automatic Multicast Tunneling (AMT) protocol, as defined in RFC 7450.

Installation

go get github.com/blockcast/go-amt

Usage

By default, go-amt uses a pure-Go implementation that works everywhere without any dependencies.

With CGO (optional, for Rust library performance)

To use the optimized Rust-based implementation via CGO:

1. Build the Rust library from pim-multicast-gateway:

cd pim-multicast-gateway/packages/amt-protocol
make ffi

2. Install to system paths or provide library location:

# Option A: Install to system (requires sudo)
sudo cp target/release/libamt_protocol.so /usr/local/lib/
sudo cp include/amt_protocol.h /usr/local/include/
sudo ldconfig

# Option B: Provide paths via environment variables
export CGO_CFLAGS="-I/path/to/amt-protocol/include"
export CGO_LDFLAGS="-L/path/to/amt-protocol/target/release -lamt_protocol"

3. Build with CGO enabled:

CGO_ENABLED=1 go build

Build Constraints

Build	Implementation	Requirements
CGO_ENABLED=0	Pure Go	None
CGO_ENABLED=1 (no lib)	Pure Go	None (CGO files won't compile without library)
CGO_ENABLED=1 + lib	Rust FFI	libamt_protocol installed

License

MIT