forked from ghettovoice/gosip
/
transport.go
357 lines (306 loc) · 8.1 KB
/
transport.go
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// transport package implements SIP transport layer.
package transport
import (
"errors"
"fmt"
"io"
"net"
"regexp"
"strconv"
"strings"
"github.com/Juphoon/gosip/log"
"github.com/Juphoon/gosip/sip"
)
const (
MTU = sip.MTU
DefaultHost = sip.DefaultHost
DefaultProtocol = sip.DefaultProtocol
DefaultUdpPort = sip.DefaultUdpPort
DefaultTcpPort = sip.DefaultTcpPort
DefaultTlsPort = sip.DefaultTlsPort
DefaultWsPort = sip.DefaultWsPort
DefaultWssPort = sip.DefaultWssPort
)
// Target endpoint
type Target struct {
Host string
Port *sip.Port
}
func (trg *Target) Addr() string {
var (
host string
port sip.Port
)
if strings.TrimSpace(trg.Host) != "" {
host = trg.Host
} else {
host = DefaultHost
}
if trg.Port != nil {
port = *trg.Port
}
return fmt.Sprintf("%v:%v", host, port)
}
func (trg *Target) String() string {
if trg == nil {
return "<nil>"
}
fields := log.Fields{
"target_addr": trg.Addr(),
}
return fmt.Sprintf("transport.Target<%s>", fields)
}
func NewTarget(host string, port int) *Target {
cport := sip.Port(port)
return &Target{Host: host, Port: &cport}
}
func NewTargetFromAddr(addr string) (*Target, error) {
host, port, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
iport, err := strconv.Atoi(port)
if err != nil {
return nil, err
}
return NewTarget(host, iport), nil
}
// Fills endpoint target with default values.
func FillTargetHostAndPort(network string, target *Target) *Target {
if strings.TrimSpace(target.Host) == "" {
target.Host = DefaultHost
}
if target.Port == nil {
p := sip.DefaultPort(network)
target.Port = &p
}
return target
}
// Transport error
type Error interface {
net.Error
// Network indicates network level errors
Network() bool
}
func isNetwork(err error) bool {
var netErr net.Error
if errors.As(err, &netErr) {
return true
} else {
return errors.Is(err, io.EOF) || errors.Is(err, io.ErrClosedPipe)
}
}
func isTimeout(err error) bool {
var netErr net.Error
if errors.As(err, &netErr) {
return netErr.Timeout()
}
return false
}
func isTemporary(err error) bool {
var netErr net.Error
if errors.As(err, &netErr) {
return netErr.Temporary()
}
return false
}
func isCanceled(err error) bool {
var cancelErr sip.CancelError
if errors.As(err, &cancelErr) {
return cancelErr.Canceled()
}
return false
}
func isExpired(err error) bool {
var expiryErr sip.ExpireError
if errors.As(err, &expiryErr) {
return expiryErr.Expired()
}
return false
}
// Connection level error.
type ConnectionError struct {
Err error
Op string
Net string
Source string
Dest string
ConnPtr string
}
func (err *ConnectionError) Unwrap() error { return err.Err }
func (err *ConnectionError) Network() bool { return isNetwork(err.Err) }
func (err *ConnectionError) Timeout() bool { return isTimeout(err.Err) }
func (err *ConnectionError) Temporary() bool { return isTemporary(err.Err) }
func (err *ConnectionError) Error() string {
if err == nil {
return "<nil>"
}
fields := log.Fields{
"network": "???",
"connection_ptr": "???",
"source": "???",
"destination": "???",
}
if err.Net != "" {
fields["network"] = err.Net
}
if err.ConnPtr != "" {
fields["connection_ptr"] = err.ConnPtr
}
if err.Source != "" {
fields["source"] = err.Source
}
if err.Dest != "" {
fields["destination"] = err.Dest
}
return fmt.Sprintf("transport.ConnectionError<%s> %s failed: %s", fields, err.Op, err.Err)
}
type ExpireError string
func (err ExpireError) Network() bool { return false }
func (err ExpireError) Timeout() bool { return true }
func (err ExpireError) Temporary() bool { return false }
func (err ExpireError) Canceled() bool { return false }
func (err ExpireError) Expired() bool { return true }
func (err ExpireError) Error() string { return "transport.ExpireError: " + string(err) }
// Net Protocol level error
type ProtocolError struct {
Err error
Op string
ProtoPtr string
}
func (err *ProtocolError) Unwrap() error { return err.Err }
func (err *ProtocolError) Network() bool { return isNetwork(err.Err) }
func (err *ProtocolError) Timeout() bool { return isTimeout(err.Err) }
func (err *ProtocolError) Temporary() bool { return isTemporary(err.Err) }
func (err *ProtocolError) Error() string {
if err == nil {
return "<nil>"
}
fields := log.Fields{
"protocol_ptr": "???",
}
if err.ProtoPtr != "" {
fields["protocol_ptr"] = err.ProtoPtr
}
return fmt.Sprintf("transport.ProtocolError<%s> %s failed: %s", fields, err.Op, err.Err)
}
type ConnectionHandlerError struct {
Err error
Key ConnectionKey
HandlerPtr string
Net string
LAddr string
RAddr string
}
func (err *ConnectionHandlerError) Unwrap() error { return err.Err }
func (err *ConnectionHandlerError) Network() bool { return isNetwork(err.Err) }
func (err *ConnectionHandlerError) Timeout() bool { return isTimeout(err.Err) }
func (err *ConnectionHandlerError) Temporary() bool { return isTemporary(err.Err) }
func (err *ConnectionHandlerError) Canceled() bool { return isCanceled(err.Err) }
func (err *ConnectionHandlerError) Expired() bool { return isExpired(err.Err) }
func (err *ConnectionHandlerError) EOF() bool {
if err.Err == io.EOF {
return true
}
ok, _ := regexp.MatchString("(?i)eof", err.Err.Error())
return ok
}
func (err *ConnectionHandlerError) Error() string {
if err == nil {
return "<nil>"
}
fields := log.Fields{
"handler_ptr": "???",
"network": "???",
"local_addr": "???",
"remote_addr": "???",
}
if err.HandlerPtr != "" {
fields["handler_ptr"] = err.HandlerPtr
}
if err.Net != "" {
fields["network"] = err.Net
}
if err.LAddr != "" {
fields["local_addr"] = err.LAddr
}
if err.RAddr != "" {
fields["remote_addr"] = err.RAddr
}
return fmt.Sprintf("transport.ConnectionHandlerError<%s>: %s", fields, err.Err)
}
type ListenerHandlerError struct {
Err error
Key ListenerKey
HandlerPtr string
Net string
Addr string
}
func (err *ListenerHandlerError) Unwrap() error { return err.Err }
func (err *ListenerHandlerError) Network() bool { return isNetwork(err.Err) }
func (err *ListenerHandlerError) Timeout() bool { return isTimeout(err.Err) }
func (err *ListenerHandlerError) Temporary() bool { return isTemporary(err.Err) }
func (err *ListenerHandlerError) Canceled() bool { return isCanceled(err.Err) }
func (err *ListenerHandlerError) Expired() bool { return isExpired(err.Err) }
func (err *ListenerHandlerError) Error() string {
if err == nil {
return "<nil>"
}
fields := log.Fields{
"handler_ptr": "???",
"network": "???",
"local_addr": "???",
"remote_addr": "???",
}
if err.HandlerPtr != "" {
fields["handler_ptr"] = err.HandlerPtr
}
if err.Net != "" {
fields["network"] = err.Net
}
if err.Addr != "" {
fields["local_addr"] = err.Addr
}
return fmt.Sprintf("transport.ListenerHandlerError<%s>: %s", fields, err.Err)
}
type PoolError struct {
Err error
Op string
Pool string
}
func (err *PoolError) Unwrap() error { return err.Err }
func (err *PoolError) Network() bool { return isNetwork(err.Err) }
func (err *PoolError) Timeout() bool { return isTimeout(err.Err) }
func (err *PoolError) Temporary() bool { return isTemporary(err.Err) }
func (err *PoolError) Error() string {
if err == nil {
return "<nil>"
}
fields := log.Fields{
"pool": "???",
}
if err.Pool != "" {
fields["pool"] = err.Pool
}
return fmt.Sprintf("transport.PoolError<%s> %s failed: %s", fields, err.Op, err.Err)
}
type UnsupportedProtocolError string
func (err UnsupportedProtocolError) Network() bool { return false }
func (err UnsupportedProtocolError) Timeout() bool { return false }
func (err UnsupportedProtocolError) Temporary() bool { return false }
func (err UnsupportedProtocolError) Error() string {
return "transport.UnsupportedProtocolError: " + string(err)
}
//TLSConfig for TLS and WSS only
type TLSConfig struct {
Domain string
Cert string
Key string
Pass string
}
func (c TLSConfig) ApplyListen(opts *ListenOptions) {
opts.TLSConfig.Domain = c.Domain
opts.TLSConfig.Cert = c.Cert
opts.TLSConfig.Key = c.Key
opts.TLSConfig.Pass = c.Pass
}