feat(gateway): repair native Apollo provider path

gateway/apollo_parser_fuzz_test.go

@@ -0,0 +1,36 @@
+package gateway
+
+import (
+	"net"
+	"testing"
+	"time"
+)
+
+func FuzzApolloENetAndRTSPParsersStayBounded(f *testing.F) {
+	server, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1")})
+	if err != nil {
+		f.Fatal(err)
+	}
+	defer server.Close()
+	client, err := net.DialUDP("udp", nil, server.LocalAddr().(*net.UDPAddr))
+	if err != nil {
+		f.Fatal(err)
+	}
+	defer client.Close()
+	f.Add([]byte{0x80, 0x01, 0, 0, apolloENetPing | apolloENetAcknowledged, 0, 0, 1})
+	f.Add([]byte("RTSP/1.0 200 OK\r\nCSeq: 1\r\n\r\n"))
+	f.Fuzz(func(t *testing.T, data []byte) {
+		if len(data) > apolloENetMaximumPacket+1 {
+			data = data[:apolloENetMaximumPacket+1]
+		}
+		peer := &apolloENetPeer{
+			conn: client, now: time.Now, state: apolloENetConnected, peerID: 1, inboundSession: 0,
+			pending: make(map[apolloENetPendingKey]*apolloENetPending), rtt: time.Millisecond, variance: time.Millisecond,
+		}
+		_ = peer.handleDatagram(data)
+		_, _ = parseApolloRTSPMessage(data)
+		_, _ = ParseRTSPResponse(data)
+		_ = validateApolloDescribe(apolloRTSPMessage{headers: map[string]string{"content-type": "application/sdp"}, body: data})
+		_, _ = parseApolloRTP(data)
+	})
+}