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Types ¶
type OuterHeaderCreationFields ¶
type OuterHeaderCreationFields struct {
OuterHeaderCreationDescription uint16
TEID uint32
IPv4Address net.IP
IPv6Address net.IP
PortNumber uint16
CTag uint32
STag uint32
}
OuterHeaderCreationFields represents parsed Outer Header Creation IE fields. This local implementation explicitly handles 3-byte C-TAG/S-TAG fields as defined for the Outer Header Creation IE in 3GPP TS 29.244, Figure 8.2.56-1.
The go-pfcp library (github.com/wmnsk/go-pfcp) incorrectly uses Uint32 (4 bytes) to read 3-byte C-TAG/S-TAG fields, causing payload misalignment.
func ParseOuterHeaderCreation ¶
func ParseOuterHeaderCreation(payload []byte) (*OuterHeaderCreationFields, error)
Bit flags in Octet 5 (payload[0]) determine which fields are present:
Bit 1 (0x01): GTP-U/UDP/IPv4 → TEID + IPv4 Bit 2 (0x02): GTP-U/UDP/IPv6 → TEID + IPv6 Bit 3 (0x04): UDP/IPv4 → IPv4 + Port Bit 4 (0x08): UDP/IPv6 → IPv6 + Port Bit 5 (0x10): IPv4 → IPv4 Bit 6 (0x20): IPv6 → IPv6 Bit 7 (0x40): C-TAG → 3-octet C-TAG Bit 8 (0x80): S-TAG → 3-octet S-TAG
func (*OuterHeaderCreationFields) HasIPv4 ¶
func (f *OuterHeaderCreationFields) HasIPv4() bool
HasIPv4 checks if OuterHeaderCreation has IPv4 field
func (*OuterHeaderCreationFields) HasTEID ¶
func (f *OuterHeaderCreationFields) HasTEID() bool
HasTEID checks if OuterHeaderCreation has TEID field
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