Пример #1
0
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")
Пример #2
0
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")