62 lines
1.6 KiB
V
62 lines
1.6 KiB
V
import net
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import time
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fn echo_server(mut c net.UdpConn) {
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mut count := 0
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for {
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eprintln('> echo_server loop count: $count')
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mut buf := []byte{len: 100}
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read, addr := c.read(mut buf) or { continue }
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eprintln('Server got addr $addr, read: $read | buf: $buf')
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c.write_to(addr, buf[..read]) or {
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println('Server: connection dropped')
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return
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}
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count++
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// Normally, after responding, the test will end, but there are sometimes cases,
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// when the echo_server continued looping, printing messages constantly.
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// The sleep here, is a small precaution against spamming the CI with log messages,
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// when there are network problems, and it allows easier root cause diagnostic, when
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// they do happen:
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time.sleep(1000 * time.millisecond)
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}
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}
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const server_addr = '127.0.0.1:40003'
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fn echo() ? {
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mut c := net.dial_udp(server_addr) or { panic('could not net.dial_udp: $err') }
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defer {
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c.close() or {}
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}
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data := 'Hello from vlib/net!'
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c.write_string(data) or { panic('could not write_string: $err') }
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mut buf := []byte{len: 100, init: 0}
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read, addr := c.read(mut buf) or { panic('could not read: $err') }
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assert read == data.len
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println('Got address $addr')
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// Can't test this here because loopback addresses
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// are mapped to other addresses
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// assert addr.str() == '127.0.0.1:30001'
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for i := 0; i < read; i++ {
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assert buf[i] == data[i]
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}
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println('Got "$buf.bytestr()"')
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c.close() ?
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}
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fn test_udp() {
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mut l := net.listen_udp(server_addr) or { panic('could not listen_udp: $err') }
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go echo_server(mut l)
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echo() or { panic('could not echo: $err') }
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l.close() or {}
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}
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