1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
package turn
import (
"fmt"
"net"
"strconv"
"github.com/pion/transport/v2"
"github.com/pion/transport/v2/stdnet"
)
// RelayAddressGeneratorStatic can be used to return static IP address each time a relay is created.
// This can be used when you have a single static IP address that you want to use
type RelayAddressGeneratorStatic struct {
// RelayAddress is the IP returned to the user when the relay is created
RelayAddress net.IP
// Address is passed to Listen/ListenPacket when creating the Relay
Address string
Net transport.Net
}
// Validate is called on server startup and confirms the RelayAddressGenerator is properly configured
func (r *RelayAddressGeneratorStatic) Validate() error {
if r.Net == nil {
var err error
r.Net, err = stdnet.NewNet()
if err != nil {
return fmt.Errorf("failed to create network: %w", err)
}
}
switch {
case r.RelayAddress == nil:
return errRelayAddressInvalid
case r.Address == "":
return errListeningAddressInvalid
default:
return nil
}
}
// AllocatePacketConn generates a new PacketConn to receive traffic on and the IP/Port to populate the allocation response with
func (r *RelayAddressGeneratorStatic) AllocatePacketConn(network string, requestedPort int) (net.PacketConn, net.Addr, error) {
conn, err := r.Net.ListenPacket(network, r.Address+":"+strconv.Itoa(requestedPort))
if err != nil {
return nil, nil, err
}
// Replace actual listening IP with the user requested one of RelayAddressGeneratorStatic
relayAddr, ok := conn.LocalAddr().(*net.UDPAddr)
if !ok {
return nil, nil, errNilConn
}
relayAddr.IP = r.RelayAddress
return conn, relayAddr, nil
}
// AllocateConn generates a new Conn to receive traffic on and the IP/Port to populate the allocation response with
func (r *RelayAddressGeneratorStatic) AllocateConn(network string, requestedPort int) (net.Conn, net.Addr, error) {
return nil, nil, errTODO
}
|
