Module constants 

Wire-format constants: markers, lengths, type codes.

Modules

as_path_segment

AS_PATH segment types (RFC 4271 §4.3).

attr_flags

Path attribute flag bits (RFC 4271 §4.3).

attr_type

Path attribute type codes (RFC 4271 §5).

capability_code

Capability codes (IANA BGP Capability Codes registry).

message_type

Message type codes.

param_type

OPEN optional parameter type codes (RFC 5492).

Constants

AS_TRANS

AS_TRANS value for 4-byte ASN backward compatibility (RFC 6793).

BGP_PORT

Default BGP TCP port.

BGP_VERSION

BGP protocol version.

EXTENDED_MAX_MESSAGE_LEN

Maximum BGP message length with Extended Messages (RFC 8654).

HEADER_LEN

Length of the BGP message header in bytes.

MARKER

The 16-byte marker field (all 0xFF) that begins every BGP message.

MARKER_LEN

Size of the marker field in the header.

MAX_MESSAGE_LEN

Maximum valid BGP message length per RFC 4271 §4.1.

MIN_HOLD_TIME

Minimum non-zero hold time in seconds (RFC 4271 §4.2).

MIN_MESSAGE_LEN

Minimum valid BGP message length (header only, used by KEEPALIVE).

MIN_NOTIFICATION_LEN

Minimum NOTIFICATION message length (header + code + subcode).

MIN_OPEN_LEN

Minimum OPEN message length (header + version + AS + hold + ID + opt len).

MIN_UPDATE_LEN

Minimum UPDATE message length (header + withdrawn len + attrs len).