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""" ovsargs provide argument parsing for ovs-test utility """ import argparse import re import socket import sys CONTROL_PORT = 15531 DATA_PORT = 15532 def ip_address(string): """Verifies if string is a valid IP address""" try: socket.inet_aton(string) except socket.error: raise argparse.ArgumentTypeError("Not a valid IPv4 address") return string def ip_optional_mask(string): """ Verifies if string contains a valid IP address and an optional mask in CIDR notation. """ token = string.split("/") if len(token) > 2: raise argparse.ArgumentTypeError("IP address and netmask must be " "separated by a single slash") elif len(token) == 2: try: mask = int(token[1]) except ValueError: raise argparse.ArgumentTypeError("Netmask is not a valid integer") if mask < 0 or mask > 31: raise argparse.ArgumentTypeError("Netmask must be in range 0..31") ip_address(token[0]) return string def port(string): """Convert a string into a TCP/UDP Port (integer)""" try: port_number = int(string) if port_number < 1 or port_number > 65535: raise argparse.ArgumentTypeError("Port is out of range") except ValueError: raise argparse.ArgumentTypeError("Port is not an integer") return port_number def ip_optional_port(string, default_port, ip_callback): """Convert a string into IP and Port pair. If port was absent then use default_port as the port. The third argument is a callback that verifies whether IP address is given in correct format.""" value = string.split(':') if len(value) == 1: return (ip_callback(value[0]), default_port) elif len(value) == 2: return (ip_callback(value[0]), port(value[1])) else: raise argparse.ArgumentTypeError("IP address from the optional Port " "must be colon-separated") def ip_optional_port_port(string, default_port1, default_port2, ip_callback): """Convert a string into IP, Port1, Port2 tuple. If any of ports were missing, then default ports will be used. The fourth argument is a callback that verifies whether IP address is given in the expected format.""" value = string.split(':') if len(value) == 1: return (ip_callback(value[0]), default_port1, default_port2) elif len(value) == 2: return (ip_callback(value[0]), port(value[1]), default_port2) elif len(value) == 3: return (ip_callback(value[0]), port(value[1]), port(value[2])) else: raise argparse.ArgumentTypeError("Expected IP address and at most " "two colon-separated ports") def vlan_tag(string): """ This function verifies whether given string is a correct VLAN tag. """ try: value = int(string) except ValueError: raise argparse.ArgumentTypeError("VLAN tag is not a valid integer") if value < 1 or value > 4094: raise argparse.ArgumentTypeError("Not a valid VLAN tag. " "VLAN tag should be in the " "range 1..4094.") return string def server_endpoint(string): """Converts a string OuterIP[:OuterPort],InnerIP[/Mask][:InnerPort] into a 4-tuple, where: 1. First element is OuterIP 2. Second element is OuterPort (if omitted will use default value 15531) 3 Third element is InnerIP with optional mask 4. Fourth element is InnerPort (if omitted will use default value 15532) """ value = string.split(',') if len(value) == 2: ret1 = ip_optional_port(value[0], CONTROL_PORT, ip_address) ret2 = ip_optional_port(value[1], DATA_PORT, ip_optional_mask) return (ret1[0], ret1[1], ret2[0], ret2[1]) else: raise argparse.ArgumentTypeError("OuterIP:OuterPort and InnerIP/Mask:" "InnerPort must be comma separated") class UniqueServerAction(argparse.Action): """ This custom action class will prevent user from entering multiple ovs-test servers with the same OuterIP. If there is an server with 127.0.0.1 outer IP address then it will be inserted in the front of the list. """ def __call__(self, parser, namespace, values, option_string=None): outer_ips = set() endpoints = [] for server in values: try: endpoint = server_endpoint(server) except argparse.ArgumentTypeError: raise argparse.ArgumentError(self, str(sys.exc_info()[1])) if endpoint[0] in outer_ips: raise argparse.ArgumentError(self, "Duplicate OuterIPs found") else: outer_ips.add(endpoint[0]) if endpoint[0] == "127.0.0.1": endpoints.insert(0, endpoint) else: endpoints.append(endpoint) setattr(namespace, self.dest, endpoints) def bandwidth(string): """Convert a string (given in bits/second with optional magnitude for units) into a long (bytes/second)""" if re.match("^[1-9][0-9]*[MK]?$", string) is None: raise argparse.ArgumentTypeError("Not a valid target bandwidth") bwidth = string.replace("M", "000000") bwidth = bwidth.replace("K", "000") return int(bwidth) / 8 # Convert from bits to bytes def tunnel_types(string): """ This function converts a string into a list that contains all tunnel types that user intended to test. """ return string.split(',') def l3_endpoint_client(string): """ This function parses command line argument string in remoteIP,localInnerIP[/mask][:ControlPort[:TestPort]],remoteInnerIP[: ControlPort[:TestPort]] format. """ try: remote_ip, me, he = string.split(',') except ValueError: raise argparse.ArgumentTypeError("All 3 IP addresses must be comma " "separated.") r = (ip_address(remote_ip), ip_optional_port_port(me, CONTROL_PORT, DATA_PORT, ip_optional_mask), ip_optional_port_port(he, CONTROL_PORT, DATA_PORT, ip_address)) return r def l3_endpoint_server(string): """ This function parses a command line argument string in remoteIP,localInnerIP[/mask][:ControlPort] format. """ try: remote_ip, me = string.split(',') except ValueError: raise argparse.ArgumentTypeError("Both IP addresses must be comma " "separated.") return (ip_address(remote_ip), ip_optional_port(me, CONTROL_PORT, ip_optional_mask)) def ovs_initialize_args(): """ Initialize argument parsing for ovs-test utility. """ parser = argparse.ArgumentParser(description='Test connectivity ' 'between two Open vSwitches.') parser.add_argument('-v', '--version', action='version', version='ovs-test (Open vSwitch) @VERSION@') parser.add_argument("-b", "--bandwidth", action='store', dest="targetBandwidth", default="1M", type=bandwidth, help='Target bandwidth for UDP tests in bits/second. Use ' 'postfix M or K to alter unit magnitude.') parser.add_argument("-i", "--interval", action='store', dest="testInterval", default=5, type=int, help='Interval for how long to run each test in seconds.') parser.add_argument("-t", "--tunnel-modes", action='store', dest="tunnelModes", default=(), type=tunnel_types, help='Do L3 tests with the given tunnel modes.') parser.add_argument("-l", "--vlan-tag", action='store', dest="vlanTag", default=None, type=vlan_tag, help='Do VLAN tests and use the given VLAN tag.') parser.add_argument("-d", "--direct", action='store_true', dest="direct", default=None, help='Do direct tests between both ovs-test servers.') group = parser.add_mutually_exclusive_group(required=True) group.add_argument("-s", "--server", action="store", dest="port", type=port, help='Run in server mode and wait for the client to ' 'connect to this port.') group.add_argument('-c', "--client", nargs=2, dest="servers", action=UniqueServerAction, metavar=("SERVER1", "SERVER2"), help='Run in client mode and do tests between these ' 'two ovs-test servers. Each server must be specified in ' 'following format - OuterIP:OuterPort,InnerIP[/mask] ' ':InnerPort. It is possible to start local instance of ' 'ovs-test server in the client mode by using 127.0.0.1 as ' 'OuterIP.') return parser.parse_args() def l3_initialize_args(): """ Initialize argument parsing for ovs-l3ping utility. """ parser = argparse.ArgumentParser(description='Test L3 tunnel ' 'connectivity between two Open vSwitch instances.') parser.add_argument('-v', '--version', action='version', version='ovs-l3ping (Open vSwitch) @VERSION@') parser.add_argument("-b", "--bandwidth", action='store', dest="targetBandwidth", default="1M", type=bandwidth, help='Target bandwidth for UDP tests in bits/second. Use ' 'postfix M or K to alter unit magnitude.') parser.add_argument("-i", "--interval", action='store', dest="testInterval", default=5, type=int, help='Interval for how long to run each test in seconds.') parser.add_argument("-t", "--tunnel-mode", action='store', dest="tunnelMode", required=True, help='Do L3 tests with this tunnel type.') group = parser.add_mutually_exclusive_group(required=True) group.add_argument("-s", "--server", action="store", dest="server", metavar="TUNNELIP,SERVER", type=l3_endpoint_server, help='Run in server mode and wait for the client to ' 'connect.') group.add_argument('-c', "--client", action="store", dest="client", metavar="TUNNELIP,CLIENT,SERVER", type=l3_endpoint_client, help='Run in client mode and connect to the server.') return parser.parse_args()