diff options
Diffstat (limited to 'vendor/github.com/pion/turn/v2/internal/proto/reqfamily.go')
-rw-r--r-- | vendor/github.com/pion/turn/v2/internal/proto/reqfamily.go | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/github.com/pion/turn/v2/internal/proto/reqfamily.go b/vendor/github.com/pion/turn/v2/internal/proto/reqfamily.go new file mode 100644 index 0000000..e83d6bb --- /dev/null +++ b/vendor/github.com/pion/turn/v2/internal/proto/reqfamily.go @@ -0,0 +1,61 @@ +package proto + +import ( + "errors" + + "github.com/pion/stun" +) + +// RequestedAddressFamily represents the REQUESTED-ADDRESS-FAMILY Attribute as +// defined in RFC 6156 Section 4.1.1. +type RequestedAddressFamily byte + +const requestedFamilySize = 4 + +var errInvalidRequestedFamilyValue = errors.New("invalid value for requested family attribute") + +// GetFrom decodes REQUESTED-ADDRESS-FAMILY from message. +func (f *RequestedAddressFamily) GetFrom(m *stun.Message) error { + v, err := m.Get(stun.AttrRequestedAddressFamily) + if err != nil { + return err + } + if err = stun.CheckSize(stun.AttrRequestedAddressFamily, len(v), requestedFamilySize); err != nil { + return err + } + switch v[0] { + case byte(RequestedFamilyIPv4), byte(RequestedFamilyIPv6): + *f = RequestedAddressFamily(v[0]) + default: + return errInvalidRequestedFamilyValue + } + return nil +} + +func (f RequestedAddressFamily) String() string { + switch f { + case RequestedFamilyIPv4: + return "IPv4" + case RequestedFamilyIPv6: + return "IPv6" + default: + return "unknown" + } +} + +// AddTo adds REQUESTED-ADDRESS-FAMILY to message. +func (f RequestedAddressFamily) AddTo(m *stun.Message) error { + v := make([]byte, requestedFamilySize) + v[0] = byte(f) + // b[1:4] is RFFU = 0. + // The RFFU field MUST be set to zero on transmission and MUST be + // ignored on reception. It is reserved for future uses. + m.Add(stun.AttrRequestedAddressFamily, v) + return nil +} + +// Values for RequestedAddressFamily as defined in RFC 6156 Section 4.1.1. +const ( + RequestedFamilyIPv4 RequestedAddressFamily = 0x01 + RequestedFamilyIPv6 RequestedAddressFamily = 0x02 +) |