pkg gortc.io/stun, const AttrRequestedAddressFamily = 23
pkg gortc.io/stun, const AttrRequestedAddressFamily AttrType
pkg gortc.io/stun, const CodeAddrFamilyNotSupported = 440
pkg gortc.io/stun, const CodeAddrFamilyNotSupported ErrorCode
pkg gortc.io/stun, const CodePeerAddrFamilyMismatch = 443
pkg gortc.io/stun, const CodePeerAddrFamilyMismatch ErrorCode
