velt/net/udp#

import { bindUdp } from "velt/net/udp". UDP sockets. Addresses are "host:port" strings. UdpSocket is a handle like TcpStream: it can be used from several tasks and is released by close().

• bindUdp(addr): Promise<UdpSocket>: port 0 picks a free port.
• UdpSocket { port: number }:
  • sendTo(data: u8[], addr): Promise<i64>, sendTextTo(text, addr)
  • recvFrom(max = 0): Promise<Datagram>
  • setBroadcast(on), close()
• Datagram { data: u8[]; addr }: addr is the sender's "ip:port"; text() decodes the payload as UTF-8.

import { bindUdp } from "velt/net/udp";

const server = await bindUdp("127.0.0.1:0");
const client = await bindUdp("127.0.0.1:0");
await client.sendTextTo("ping", `127.0.0.1:${server.port}`);
const d = await server.recvFrom();
await server.sendTextTo("pong", d.addr);
console.log(d.text(), (await client.recvFrom()).text()); // ping pong
client.close();
server.close();