ethermess/ethermess.py

#!/usr/bin/env python3
libexec_dir = __LIBEXECDIR__

import subprocess
import sys
import time

def writeall(f, b):
	written = 0
	while written < len(b):
		written += f.write(b[written:])

def parse_mac(text):
	parts = text.split(':')
	if len(parts) != 6:
		raise ValueError('Invalid MAC format: %s' % text)

	try:
		parsed = bytes(int(field, 16) for field in parts)
	except ValueError:
		raise ValueError('Invalid MAC format %s' % text)

	return parsed

nick = input('nick> ').encode('utf-8')

proc = subprocess.Popen(['sudo', libexec_dir + '/ethermess-backend', *sys.argv[1:]], stdin = subprocess.PIPE, stdout = sys.stdout, stderr = sys.stderr, bufsize = 0)

writeall(proc.stdin, (bytes([0, len(nick)]) + nick))

print('s - request status, i - request msgid, m - send message, ^D - quit')

while True:
	try:
		try:
			command = input('')

			if command == 's':
				mac = parse_mac(input('mac> '))
				writeall(proc.stdin, b's' + mac)

			elif command == 'i':
				mac = parse_mac(input('mac> '))
				writeall(proc.stdin, b'i' + mac)

			elif command == 'm':
				mac = parse_mac(input('mac> '))
				message = input('message> ').encode('utf-8')
				writeall(proc.stdin, b'm' + mac + bytes([len(message) >> 8, len(message) & 0xff]) + message)

			else:
				print('s - request status, i - request msgid, m - send message, ^D - quit')

		except EOFError:
			writeall(proc.stdin, b'q')
			break

	except Exception as err:
		print(err)

sys.exit(proc.wait())