local socket = require"socket" local udp = socket.udp local localhost = "127.0.0.1" local port = assert(arg[1], "missing port argument") se = udp(); se:setoption("reuseaddr", true) se:setsockname(localhost, 5062) print("se", se:getsockname()) sc = udp(); sc:setoption("reuseaddr", true) sc:setsockname(localhost, 5061) print("sc", sc:getsockname()) se:sendto("this is a test from se", localhost, port) socket.sleep(1) sc:sendto("this is a test from sc", localhost, port) socket.sleep(1) se:sendto("this is a test from se", localhost, port) socket.sleep(1) sc:sendto("this is a test from sc", localhost, port)