运行example_server.go报错

[sc-zhangshijie]

github.com/1lann/go-sip/server

..\lineme-server\other\src\github.com\1lann\go-sip\server\invite.go:65:24: cannot use to (type *sipnet.Conn) as type net.Conn in argument to initialRequest.WriteTo:
*sipnet.Conn does not implement net.Conn (missing LocalAddr method)
..\lineme-server\other\src\github.com\1lann\go-sip\server\invite.go:82:16: cannot use to (type *sipnet.Conn) as type net.Conn in argument to req.WriteTo:
*sipnet.Conn does not implement net.Conn (missing LocalAddr method)
..\lineme-server\other\src\github.com\1lann\go-sip\server\invite.go:124:16: cannot use from (type *sipnet.Conn) as type net.Conn in argument to req.WriteTo:
*sipnet.Conn does not implement net.Conn (missing LocalAddr method)
..\lineme-server\other\src\github.com\1lann\go-sip\server\invite.go:177:21: cannot use toConn (type *sipnet.Conn) as type net.Conn in argument to r.WriteTo:
*sipnet.Conn does not implement net.Conn (missing LocalAddr method)