// Open opens the transport.
func (c Config) Open() (transports.Transport, error) {
mtx.Lock()
id := netxID
t := &transport{&inprocAddr{id}, make(chan packet, 10)}
netxID++
pipes[id] = t
mtx.Unlock()
return dgram.Wrap(t)
}
// Open opens the transport.
func (c Config) Open() (transports.Transport, error) {
var (
addr *net.UDPAddr
err error
)
if c.Network == "" {
c.Network = UDPv4
}
if c.Addr == "" {
c.Addr = ":0"
}
if c.Network != UDPv4 && c.Network != UDPv6 {
return nil, errors.New("udp: Network must be either `udp4` or `udp6`")
}
{ // parse and verify source address
addr, err = net.ResolveUDPAddr(c.Network, c.Addr)
if err != nil {
return nil, err
}
if c.Network == UDPv4 && addr.IP != nil && !ipIs4(addr.IP) {
return nil, errors.New("udp: expected a IPv4 address")
}
if c.Network == UDPv6 && addr.IP != nil && ipIs4(addr.IP) {
return nil, errors.New("udp: expected a IPv6 address")
}
}
conn, err := net.ListenUDP(c.Network, addr)
if err != nil {
return nil, err
}
addr = conn.LocalAddr().(*net.UDPAddr)
t := &transport{net: c.Network, laddr: wrapAddr(addr), c: conn}
return dgram.Wrap(t)
}