:type node: dict
:type ip_version: str
:type direction: str
- :return table_index: Classify table index.
- :return skip_n: Number of skip vectors.
- :return match_n: Number of match vectors.
- :rtype table_index: int
- :rtype skip_n: int
- :rtype match_n: int
+ :return (table_index, skip_n, match_n)
+ table_index: Classify table index.
+ skip_n: Number of skip vectors.
+ match_n: Number of match vectors.
+ :rtype: tuple(int, int, int)
+ :raises RuntimeError: If VPP can't create table.
"""
output = VatExecutor.cmd_from_template(node, "classify_add_table.vat",
ip_version=ip_version,
return table_index, skip_n, match_n
+ @staticmethod
+ def vpp_create_classify_table_hex(node, hex_mask):
+ """Create classify table with hex mask.
+
+ :param node: VPP node to create classify table based on hex mask.
+ :param hex_mask: Classify hex mask.
+ :type node: dict
+ :type hex_mask: str
+ :return (table_index, skip_n, match_n)
+ table_index: Classify table index.
+ skip_n: Number of skip vectors.
+ match_n: Number of match vectors.
+ :rtype: tuple(int, int, int)
+ :raises RuntimeError: If VPP can't create table.
+ """
+ output = VatExecutor.cmd_from_template(node,
+ "classify_add_table_hex.vat",
+ hex_mask=hex_mask)
+
+ if output[0]["retval"] == 0:
+ table_index = output[0]["new_table_index"]
+ skip_n = output[0]["skip_n_vectors"]
+ match_n = output[0]["match_n_vectors"]
+ logger.trace('Classify table with table_index {} created on node {}'
+ .format(table_index, node['host']))
+ else:
+ raise RuntimeError('Unable to create classify table on node {}'
+ .format(node['host']))
+
+ return table_index, skip_n, match_n
+
@staticmethod
def vpp_configure_classify_session(node, acl_method, table_index, skip_n,
match_n, ip_version, direction, address):
ip_version=ip_version,
direction=direction,
address=address)
+
+ @staticmethod
+ def vpp_configure_classify_session_hex(node, acl_method, table_index,
+ skip_n, match_n, hex_value):
+ """Configuration of classify session with hex value.
+
+ :param node: VPP node to setup classify session.
+ :param acl_method: ACL method - deny/permit.
+ :param table_index: Classify table index.
+ :param skip_n: Number of skip vectors based on mask.
+ :param match_n: Number of match vectors based on mask.
+ :param hex_value: Classify hex value.
+ :type node: dict
+ :type acl_method: str
+ :type table_index: int
+ :type skip_n: int
+ :type match_n: int
+ :type hex_value: str
+ """
+ with VatTerminal(node) as vat:
+ vat.vat_terminal_exec_cmd_from_template(
+ "classify_add_session_hex.vat",
+ acl_method=acl_method,
+ table_index=table_index,
+ skip_n=skip_n,
+ match_n=match_n,
+ hex_value=hex_value)
+
+ @staticmethod
+ def compute_classify_hex_mask(ip_version, protocol, direction):
+ """Compute classify hex mask for TCP or UDP packet matching.
+
+ :param ip_version: Version of IP protocol.
+ :param protocol: Type of protocol.
+ :param direction: Traffic direction.
+ :type ip_version: str
+ :type protocol: str
+ :type direction: str
+ :return: Classify hex mask.
+ :rtype : str
+ :raises ValueError: If protocol is not TCP or UDP.
+ :raises ValueError: If direction is not source or destination or
+ source + destination.
+ """
+ if protocol == 'TCP' or protocol == 'UDP':
+ base_mask = Classify._compute_base_mask(ip_version)
+
+ if direction == 'source':
+ return base_mask + 'FFFF0000'
+ elif direction == 'destination':
+ return base_mask + '0000FFFF'
+ elif direction == 'source + destination':
+ return base_mask + 'FFFFFFFF'
+ else:
+ raise ValueError("Invalid direction!")
+ else:
+ raise ValueError("Invalid protocol!")
+
+ @staticmethod
+ def compute_classify_hex_value(hex_mask, source_port, destination_port):
+ """Compute classify hex value for TCP or UDP packet matching.
+
+ :param hex_mask: Classify hex mask.
+ :param source_port: Source TCP/UDP port.
+ :param destination_port: Destination TCP/UDP port.
+ :type hex_mask: str
+ :type source_port: str
+ :type destination_port: str
+ :return: Classify hex value.
+ :rtype: str
+ """
+ source_port_hex = Classify._port_convert(source_port)
+ destination_port_hex = Classify._port_convert(destination_port)
+
+ return hex_mask[:-8] + source_port_hex + destination_port_hex
+
+ @staticmethod
+ def _port_convert(port):
+ """Convert port number for classify hex table format.
+
+ :param port: TCP/UDP port number.
+ :type port: str
+ :return: TCP/UDP port number in 4-digit hexadecimal format.
+ :rtype: str
+ """
+ return '{0:04x}'.format(int(port))
+
+ @staticmethod
+ def _compute_base_mask(ip_version):
+ """Compute base classify hex mask based on IP version.
+
+ :param ip_version: Version of IP protocol.
+ :type ip_version: str
+ :return: Base hex mask.
+ :rtype: str
+ """
+ if ip_version == 'ip4':
+ return 68 * '0'
+ # base value of classify hex table for IPv4 TCP/UDP ports
+ elif ip_version == 'ip6':
+ return 108 * '0'
+ # base value of classify hex table for IPv6 TCP/UDP ports
+ else:
+ raise ValueError("Invalid IP version!")
Code Review / csit.git / blobdiff