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# $Id: esp.py 23 2006-11-08 15:45:33Z dugsong $
# -*- coding: utf-8 -*-
"""Encapsulated Security Protocol."""
from __future__ import absolute_import
from . import dpkt
class ESP(dpkt.Packet):
"""Encapsulated Security Protocol.
Encapsulating Security Payload (ESP) is a member of the Internet Protocol Security (IPsec) set of protocols that
encrypt and authenticate the packets of data between computers using a Virtual Private Network (VPN). The focus
and layer on which ESP operates makes it possible for VPNs to function securely.
Attributes:
__hdr__: Header fields of ESP.
spi: (int): Security Parameters Index. An arbitrary value that, in combination with the destination
IP address and security protocol (ESP), uniquely identifies the SA for this datagram. (4 bytes)
spi: (int): Sequence number. This field contains a monotonically increasing counter value. (4 bytes)
"""
__hdr__ = (
('spi', 'I', 0),
('seq', 'I', 0)
)
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