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import os
import os.cmdline
import net
fn main() {
println('Usage: net_udp_server_and_client [-l] [-p 5000]')
println(' -l - act as a server and listen')
println(' -p XXXX - custom port number')
println('------------------------------------------')
is_server := '-l' in os.args
port := cmdline.option(os.args, '-p', '40001').int()
mut buf := []byte{len: 100}
if is_server {
println('UDP echo server, listening for udp packets on port: $port')
mut c := net.listen_udp(':$port') ?
for {
read, addr := c.read(mut buf) or { continue }
println('received $read bytes from $addr')
c.write_to(addr, buf[..read]) or {
println('Server: connection dropped')
continue
}
}
} else {
println('UDP client, sending packets to port: ${port}.\nType `exit` to exit.')
mut c := net.dial_udp('localhost:$port') ?
for {
mut line := os.input('client > ')
match line {
'' {
line = '\n'
}
'exit' {
println('goodbye.')
exit(0)
}
else {}
}
c.write_string(line) ?
read, _ := c.read(mut buf) ?
println('server : ' + buf[0..read].bytestr())
}
}
}
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