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| 1 | +#!/usr/bin/env python |
| 2 | +# -*- coding: utf-8 -*- |
| 3 | + |
| 4 | +import json |
| 5 | +import re |
| 6 | + |
| 7 | +import XenAPIPlugin |
| 8 | + |
| 9 | +from xcpngutils import configure_logging, error_wrapped, run_command |
| 10 | + |
| 11 | + |
| 12 | +def parse_bridge(args): |
| 13 | + bridge = args.get("bridge") |
| 14 | + if bridge is None: |
| 15 | + raise ValueError("bridge parameter is missing") |
| 16 | + return bridge |
| 17 | + |
| 18 | + |
| 19 | +def parse_mac(args): |
| 20 | + MAC_REGEX = re.compile(r"^([0-9A-Fa-f]{2}:){5}([0-9A-Fa-f]{2})$") |
| 21 | + mac_addr = args.get("mac") |
| 22 | + if mac_addr is None: |
| 23 | + raise ValueError("mac address is missing") |
| 24 | + if not MAC_REGEX.match(mac_addr) or MAC_REGEX.match(mac_addr).group(0) != mac_addr: |
| 25 | + raise ValueError("{} is not a valid MAC".format(mac_addr)) |
| 26 | + return mac_addr |
| 27 | + |
| 28 | + |
| 29 | +def parse_iprange(args): |
| 30 | + IPRANGE_REGEX = re.compile( |
| 31 | + r"^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}" |
| 32 | + r"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(/\d{1,2})?$" |
| 33 | + ) |
| 34 | + ip_range = args.get("iprange") |
| 35 | + if ip_range is None: |
| 36 | + raise ValueError("ip range is missing") |
| 37 | + if not IPRANGE_REGEX.match(ip_range): |
| 38 | + raise ValueError("{} is not a valid IP range".format(ip_range)) |
| 39 | + return ip_range |
| 40 | + |
| 41 | + |
| 42 | +def parse_direction(args): |
| 43 | + # Check that direction is set and valid |
| 44 | + direction = args.get("direction") |
| 45 | + if direction is None: |
| 46 | + raise ValueError("direction is missing") |
| 47 | + |
| 48 | + dir = direction.lower().split("/") |
| 49 | + has_to = "to" in dir |
| 50 | + has_from = "from" in dir |
| 51 | + if not (has_to or has_from): |
| 52 | + raise ValueError("{} is not a valid direction".format(direction)) |
| 53 | + return has_to, has_from |
| 54 | + |
| 55 | + |
| 56 | +def parse_protocol(args): |
| 57 | + VALID_PROTOCOLS = {"tcp", "udp", "icmp", "ip"} |
| 58 | + protocol = args.get("protocol") |
| 59 | + if protocol is None: |
| 60 | + raise ValueError("protocol is missing") |
| 61 | + if protocol.lower() not in VALID_PROTOCOLS: |
| 62 | + raise ValueError("{} is not supported") |
| 63 | + return protocol |
| 64 | + |
| 65 | + |
| 66 | +def parse_port(args): |
| 67 | + port = args.get("port") |
| 68 | + if port is None: |
| 69 | + raise ValueError("port is missing") |
| 70 | + try: |
| 71 | + int(port) |
| 72 | + return port |
| 73 | + except ValueError: |
| 74 | + raise ValueError("{} is not a valid port".format(port)) |
| 75 | + |
| 76 | + |
| 77 | +@error_wrapped |
| 78 | +def add_rule(_session, args): |
| 79 | + _LOGGER.info("Calling add_rule with args {}".format(args)) |
| 80 | + |
| 81 | + try: |
| 82 | + _bridge = parse_bridge(args) |
| 83 | + _mac = parse_mac(args) |
| 84 | + _has_to, _has_from = parse_direction(args) |
| 85 | + _protocol = parse_protocol(args) |
| 86 | + _iprange = parse_iprange(args) |
| 87 | + _port = parse_port(args) |
| 88 | + except ValueError as e: |
| 89 | + _LOGGER.error(str(e)) |
| 90 | + return json.dumps( |
| 91 | + { |
| 92 | + "returncode": 1, |
| 93 | + "command": "add_rule", |
| 94 | + "stderr": str(e), |
| 95 | + "stdout": "", |
| 96 | + } |
| 97 | + ) |
| 98 | + |
| 99 | + return json.dumps(True) |
| 100 | + |
| 101 | + |
| 102 | +@error_wrapped |
| 103 | +def del_rule(_session, args): |
| 104 | + _LOGGER.info("Calling del_rule with args {}".format(args)) |
| 105 | + return json.dumps(True) |
| 106 | + |
| 107 | + |
| 108 | +@error_wrapped |
| 109 | +def dump_flows(_session, args): |
| 110 | + _LOGGER.info("Calling check with args {}".format(args)) |
| 111 | + ofctl_cmd = ["ovs-ofctl", "dump-flows"] |
| 112 | + bridge = args.get("bridge") |
| 113 | + |
| 114 | + ofctl_cmd.append(bridge) |
| 115 | + cmd = run_command(ofctl_cmd, check=False) |
| 116 | + return json.dumps(cmd) |
| 117 | + |
| 118 | + |
| 119 | +_LOGGER = configure_logging("sdn-controller") |
| 120 | +if __name__ == "__main__": |
| 121 | + XenAPIPlugin.dispatch( |
| 122 | + { |
| 123 | + "add-rule": add_rule, |
| 124 | + "del-rule": del_rule, |
| 125 | + "dump-flows": dump_flows, |
| 126 | + } |
| 127 | + ) |
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