adb-auto-connect-mdns.ts

import * as dnssd from 'npm:ya-dns-sd'

const timeout = Number(Deno.args[0]) || 30

// Check if it's needed and prompt
const connectedDevices = new TextDecoder().decode(await Deno.run({
  cmd: ['adb', 'devices'],
  stdout: 'piped'
}).output()).split(/\r?\n/g).filter(e => e).slice(1).map(e => e.split('\t')[0])

if (connectedDevices.length > 0) {
  console.log('Already connected to ' + connectedDevices.join(' '))
  console.log('Press y to disconnect and start scanning')
  if (!confirm()) Deno.exit()

  await Deno.run({
    cmd: ['adb', 'disconnect']
  }).status()
}

const controller = new AbortController()
const timer = setTimeout(() => {
  console.error(`Nothing found after ${timeout} seconds`)
  controller.abort()
  Deno.exit(1)
}, timeout * 1000)

for await (
  const service of dnssd.browse({
    multicastInterface: new dnssd.MulticastInterface(),
    service: {
      protocol: 'tcp',
      type: 'adb-tls-connect',
    },
    signal: controller.signal
  })
) {
  if (!service.isActive) continue
  const ipPortPair = service.host + ':' + service.port
  console.log('Connecting to', ipPortPair)
  await Deno.run({
    cmd: ['adb', 'connect', ipPortPair]
  }).status()
  clearTimeout(timer)
  Deno.exit(0)
}

Check port scanning version here: https://gist.github.com/qgustavor/64141a41907db78401a41b4c494f91b7