56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
//go:build darwin || linux
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package dhcpd
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import (
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"bytes"
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"net"
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"testing"
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"github.com/insomniacslk/dhcp/dhcpv4"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestDHCPConn_Broadcast(t *testing.T) {
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b := &bytes.Buffer{}
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var peers []*net.UDPAddr
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udpConn := &fakePacketConn{
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writeTo: func(p []byte, addr net.Addr) (n int, err error) {
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udpPeer, ok := addr.(*net.UDPAddr)
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require.True(t, ok)
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peers = append(peers, cloneUDPAddr(udpPeer))
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n, err = b.Write(p)
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require.NoError(t, err)
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return n, nil
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},
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}
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conn := &dhcpConn{
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udpConn: udpConn,
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bcastIP: net.IP{1, 2, 3, 255},
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}
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defaultPeer := &net.UDPAddr{
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IP: net.IP{1, 2, 3, 4},
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// Use neither client nor server port.
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Port: 1234,
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}
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respData := (&dhcpv4.DHCPv4{}).ToBytes()
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_, _ = conn.broadcast(respData, cloneUDPAddr(defaultPeer))
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// The same response is written twice but for different peers.
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assert.EqualValues(t, append(respData, respData...), b.Bytes())
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require.Len(t, peers, 2)
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assert.Equal(t, cloneUDPAddr(defaultPeer), peers[0])
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assert.Equal(t, &net.UDPAddr{
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IP: conn.bcastIP,
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Port: defaultPeer.Port,
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}, peers[1])
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}
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