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v/vlib/x/net/udp_test.v

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import x.net
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import time
fn echo_server(_c net.UdpConn) {
mut c := _c
// arbitrary timeouts to ensure that it doesnt
// instantly throw its hands in the air and give up
c.set_read_timeout(10 * time.second)
c.set_write_timeout(10 * time.second)
for {
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mut buf := []byte{ len: 100, init: 0 }
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read, addr := c.read_into(mut buf) or {
continue
}
c.write_to(addr, buf[..read]) or {
println('Server: connection dropped')
return
}
}
}
fn echo() ? {
mut c := net.dial_udp('127.0.0.1:40003', '127.0.0.1:40001')?
defer { c.close() or { } }
// arbitrary timeouts to ensure that it doesnt
// instantly throw its hands in the air and give up
c.set_read_timeout(10 * time.second)
c.set_write_timeout(10 * time.second)
data := 'Hello from vlib/net!'
c.write_string(data)?
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mut buf := []byte{ len: 100, init: 0 }
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read, addr := c.read_into(mut buf)?
assert read == data.len
println('Got address $addr')
// Can't test this here because loopback addresses
// are mapped to other addresses
// assert addr.str() == '127.0.0.1:30001'
for i := 0; i < read; i++ {
assert buf[i] == data[i]
}
println('Got "${buf.bytestr()}"')
c.close()?
return none
}
fn test_udp() {
l := net.listen_udp(40001) or {
println(err)
assert false
panic('')
}
go echo_server(l)
echo() or {
println(err)
assert false
}
l.close() or { }
}
fn main() {
test_udp()
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}