def validate_dhcp_resp(request, response): # pylint: disable=R1710
bytes_recv = len(response)
if bytes_recv < 0xF6:
logger.error("HandleDhcpResponse: Too few bytes received:{0}",
bytes_recv)
return False
logger.verbose("BytesReceived:{0}", hex(bytes_recv))
logger.verbose("DHCP response:{0}", hex_dump(response, bytes_recv))
# check transactionId, cookie, MAC address cookie should never mismatch
# transactionId and MAC address may mismatch if we see a response
# meant from another machine
if not compare_bytes(request, response, 0xEC, 4):
logger.verbose("Cookie not match:\nsend={0},\nreceive={1}",
hex_dump3(request, 0xEC, 4),
hex_dump3(response, 0xEC, 4))
raise DhcpError("Cookie in dhcp respones doesn't match the request")
if not compare_bytes(request, response, 4, 4):
logger.verbose("TransactionID not match:\nsend={0},\nreceive={1}",
hex_dump3(request, 4, 4), hex_dump3(response, 4, 4))
raise DhcpError("TransactionID in dhcp respones "
"doesn't match the request")
if not compare_bytes(request, response, 0x1C, 6):
logger.verbose("Mac Address not match:\nsend={0},\nreceive={1}",
hex_dump3(request, 0x1C, 6),
hex_dump3(response, 0x1C, 6))
raise DhcpError("Mac Addr in dhcp respones "
"doesn't match the request")
def validate_dhcp_resp(request, response):
bytes_recv = len(response)
if bytes_recv < 0xF6:
logger.error("HandleDhcpResponse: Too few bytes received:{0}",
bytes_recv)
return False
logger.verbose("BytesReceived:{0}", hex(bytes_recv))
logger.verbose("DHCP response:{0}", hex_dump(response, bytes_recv))
# check transactionId, cookie, MAC address cookie should never mismatch
# transactionId and MAC address may mismatch if we see a response
# meant from another machine
if not compare_bytes(request, response, 0xEC, 4):
logger.verbose("Cookie not match:\nsend={0},\nreceive={1}",
hex_dump3(request, 0xEC, 4),
hex_dump3(response, 0xEC, 4))
raise DhcpError("Cookie in dhcp respones doesn't match the request")
if not compare_bytes(request, response, 4, 4):
logger.verbose("TransactionID not match:\nsend={0},\nreceive={1}",
hex_dump3(request, 4, 4),
hex_dump3(response, 4, 4))
raise DhcpError("TransactionID in dhcp respones "
"doesn't match the request")
if not compare_bytes(request, response, 0x1C, 6):
logger.verbose("Mac Address not match:\nsend={0},\nreceive={1}",
hex_dump3(request, 0x1C, 6),
hex_dump3(response, 0x1C, 6))
raise DhcpError("Mac Addr in dhcp respones "
"doesn't match the request")
