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server/vendor/github.com/pion/turn/v2/internal/ipnet/util.go

@@ -0,0 +1,55 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+// Package ipnet contains helper functions around net and IP
+package ipnet
+
+import (
+	"errors"
+	"net"
+)
+
+var errFailedToCastAddr = errors.New("failed to cast net.Addr to *net.UDPAddr or *net.TCPAddr")
+
+// AddrIPPort extracts the IP and Port from a net.Addr
+func AddrIPPort(a net.Addr) (net.IP, int, error) {
+	aUDP, ok := a.(*net.UDPAddr)
+	if ok {
+		return aUDP.IP, aUDP.Port, nil
+	}
+
+	aTCP, ok := a.(*net.TCPAddr)
+	if ok {
+		return aTCP.IP, aTCP.Port, nil
+	}
+
+	return nil, 0, errFailedToCastAddr
+}
+
+// AddrEqual asserts that two net.Addrs are equal
+// Currently only supports UDP but will be extended in the future to support others
+func AddrEqual(a, b net.Addr) bool {
+	aUDP, ok := a.(*net.UDPAddr)
+	if !ok {
+		return false
+	}
+
+	bUDP, ok := b.(*net.UDPAddr)
+	if !ok {
+		return false
+	}
+
+	return aUDP.IP.Equal(bUDP.IP) && aUDP.Port == bUDP.Port
+}
+
+// FingerprintAddr generates a fingerprint from net.UDPAddr or net.TCPAddr's
+// which can be used for indexing maps.
+func FingerprintAddr(addr net.Addr) string {
+	switch a := addr.(type) {
+	case *net.UDPAddr:
+		return a.IP.String()
+	case *net.TCPAddr: // Do we really need this case?
+		return a.IP.String()
+	}
+	return "" // Should never happen
+}