|
| 1 | +package proxy |
| 2 | + |
| 3 | +import ( |
| 4 | + "net" |
| 5 | + "net/netip" |
| 6 | + "testing" |
| 7 | + "time" |
| 8 | + |
| 9 | + proxyproto "github.com/pires/go-proxyproto" |
| 10 | + log "github.com/sirupsen/logrus" |
| 11 | + "github.com/stretchr/testify/assert" |
| 12 | + "github.com/stretchr/testify/require" |
| 13 | +) |
| 14 | + |
| 15 | +func TestWrapProxyProtocol_OverridesRemoteAddr(t *testing.T) { |
| 16 | + srv := &Server{ |
| 17 | + Logger: log.StandardLogger(), |
| 18 | + TrustedProxies: []netip.Prefix{netip.MustParsePrefix("127.0.0.1/32")}, |
| 19 | + ProxyProtocol: true, |
| 20 | + } |
| 21 | + |
| 22 | + raw, err := net.Listen("tcp", "127.0.0.1:0") |
| 23 | + require.NoError(t, err) |
| 24 | + defer raw.Close() |
| 25 | + |
| 26 | + ln := srv.wrapProxyProtocol(raw) |
| 27 | + |
| 28 | + realClientIP := "203.0.113.50" |
| 29 | + realClientPort := uint16(54321) |
| 30 | + |
| 31 | + accepted := make(chan net.Conn, 1) |
| 32 | + go func() { |
| 33 | + conn, err := ln.Accept() |
| 34 | + if err != nil { |
| 35 | + return |
| 36 | + } |
| 37 | + accepted <- conn |
| 38 | + }() |
| 39 | + |
| 40 | + // Connect and send a PROXY v2 header. |
| 41 | + conn, err := net.Dial("tcp", ln.Addr().String()) |
| 42 | + require.NoError(t, err) |
| 43 | + defer conn.Close() |
| 44 | + |
| 45 | + header := &proxyproto.Header{ |
| 46 | + Version: 2, |
| 47 | + Command: proxyproto.PROXY, |
| 48 | + TransportProtocol: proxyproto.TCPv4, |
| 49 | + SourceAddr: &net.TCPAddr{IP: net.ParseIP(realClientIP), Port: int(realClientPort)}, |
| 50 | + DestinationAddr: &net.TCPAddr{IP: net.ParseIP("10.0.0.1"), Port: 443}, |
| 51 | + } |
| 52 | + _, err = header.WriteTo(conn) |
| 53 | + require.NoError(t, err) |
| 54 | + |
| 55 | + select { |
| 56 | + case accepted := <-accepted: |
| 57 | + defer accepted.Close() |
| 58 | + host, _, err := net.SplitHostPort(accepted.RemoteAddr().String()) |
| 59 | + require.NoError(t, err) |
| 60 | + assert.Equal(t, realClientIP, host, "RemoteAddr should reflect the PROXY header source IP") |
| 61 | + case <-time.After(2 * time.Second): |
| 62 | + t.Fatal("timed out waiting for connection") |
| 63 | + } |
| 64 | +} |
| 65 | + |
| 66 | +func TestProxyProtocolPolicy_TrustedRequires(t *testing.T) { |
| 67 | + srv := &Server{ |
| 68 | + Logger: log.StandardLogger(), |
| 69 | + TrustedProxies: []netip.Prefix{netip.MustParsePrefix("10.0.0.0/8")}, |
| 70 | + } |
| 71 | + |
| 72 | + policy, err := srv.proxyProtocolPolicy(&net.TCPAddr{IP: net.ParseIP("10.0.0.1"), Port: 1234}) |
| 73 | + require.NoError(t, err) |
| 74 | + assert.Equal(t, proxyproto.REQUIRE, policy, "trusted source should require PROXY header") |
| 75 | +} |
| 76 | + |
| 77 | +func TestProxyProtocolPolicy_UntrustedIgnores(t *testing.T) { |
| 78 | + srv := &Server{ |
| 79 | + Logger: log.StandardLogger(), |
| 80 | + TrustedProxies: []netip.Prefix{netip.MustParsePrefix("10.0.0.0/8")}, |
| 81 | + } |
| 82 | + |
| 83 | + policy, err := srv.proxyProtocolPolicy(&net.TCPAddr{IP: net.ParseIP("203.0.113.50"), Port: 1234}) |
| 84 | + require.NoError(t, err) |
| 85 | + assert.Equal(t, proxyproto.IGNORE, policy, "untrusted source should have PROXY header ignored") |
| 86 | +} |
| 87 | + |
| 88 | +func TestProxyProtocolPolicy_InvalidIPRejects(t *testing.T) { |
| 89 | + srv := &Server{ |
| 90 | + Logger: log.StandardLogger(), |
| 91 | + TrustedProxies: []netip.Prefix{netip.MustParsePrefix("10.0.0.0/8")}, |
| 92 | + } |
| 93 | + |
| 94 | + policy, err := srv.proxyProtocolPolicy(&net.UnixAddr{Name: "/tmp/test.sock", Net: "unix"}) |
| 95 | + require.NoError(t, err) |
| 96 | + assert.Equal(t, proxyproto.REJECT, policy, "unparsable address should be rejected") |
| 97 | +} |
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