120 lines
3.4 KiB
Go
120 lines
3.4 KiB
Go
package turn
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import (
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"crypto/md5" //nolint:gosec,gci
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"fmt"
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"net"
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"strings"
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"time"
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"github.com/pion/logging"
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)
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// RelayAddressGenerator is used to generate a RelayAddress when creating an allocation.
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// You can use one of the provided ones or provide your own.
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type RelayAddressGenerator interface {
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// Validate confirms that the RelayAddressGenerator is properly initialized
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Validate() error
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// Allocate a PacketConn (UDP) RelayAddress
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AllocatePacketConn(network string, requestedPort int) (net.PacketConn, net.Addr, error)
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// Allocate a Conn (TCP) RelayAddress
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AllocateConn(network string, requestedPort int) (net.Conn, net.Addr, error)
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}
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// PacketConnConfig is a single net.PacketConn to listen/write on. This will be used for UDP listeners
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type PacketConnConfig struct {
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PacketConn net.PacketConn
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// When an allocation is generated the RelayAddressGenerator
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// creates the net.PacketConn and returns the IP/Port it is available at
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RelayAddressGenerator RelayAddressGenerator
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}
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func (c *PacketConnConfig) validate() error {
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if c.PacketConn == nil {
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return errConnUnset
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}
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if c.RelayAddressGenerator == nil {
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return errRelayAddressGeneratorUnset
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}
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return c.RelayAddressGenerator.Validate()
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}
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// ListenerConfig is a single net.Listener to accept connections on. This will be used for TCP, TLS and DTLS listeners
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type ListenerConfig struct {
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Listener net.Listener
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// When an allocation is generated the RelayAddressGenerator
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// creates the net.PacketConn and returns the IP/Port it is available at
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RelayAddressGenerator RelayAddressGenerator
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}
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func (c *ListenerConfig) validate() error {
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if c.Listener == nil {
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return errListenerUnset
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}
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if c.RelayAddressGenerator == nil {
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return errRelayAddressGeneratorUnset
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}
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return c.RelayAddressGenerator.Validate()
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}
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// AuthHandler is a callback used to handle incoming auth requests, allowing users to customize Pion TURN with custom behavior
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type AuthHandler func(username, realm string, srcAddr net.Addr) (key []byte, ok bool)
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// GenerateAuthKey is a convince function to easily generate keys in the format used by AuthHandler
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func GenerateAuthKey(username, realm, password string) []byte {
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// #nosec
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h := md5.New()
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fmt.Fprint(h, strings.Join([]string{username, realm, password}, ":"))
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return h.Sum(nil)
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}
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// ServerConfig configures the Pion TURN Server
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type ServerConfig struct {
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// PacketConnConfigs and ListenerConfigs are a list of all the turn listeners
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// Each listener can have custom behavior around the creation of Relays
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PacketConnConfigs []PacketConnConfig
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ListenerConfigs []ListenerConfig
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// LoggerFactory must be set for logging from this server.
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LoggerFactory logging.LoggerFactory
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// Realm sets the realm for this server
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Realm string
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// AuthHandler is a callback used to handle incoming auth requests, allowing users to customize Pion TURN with custom behavior
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AuthHandler AuthHandler
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// ChannelBindTimeout sets the lifetime of channel binding. Defaults to 10 minutes.
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ChannelBindTimeout time.Duration
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// Sets the server inbound MTU(Maximum transmition unit). Defaults to 1600 bytes.
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InboundMTU int
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}
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func (s *ServerConfig) validate() error {
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if len(s.PacketConnConfigs) == 0 && len(s.ListenerConfigs) == 0 {
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return errNoAvailableConns
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}
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for _, s := range s.PacketConnConfigs {
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if err := s.validate(); err != nil {
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return err
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}
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}
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for _, s := range s.ListenerConfigs {
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if err := s.validate(); err != nil {
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return err
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}
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}
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return nil
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}
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