ryu/lib/ofctl_v1_0: introduce OF interface
This patch provides the raw OF interface. We can talk with a switch by using the OF interface via some protocols such as REST. Signed-off-by: OHMURA Kei <ohmura.kei@lab.ntt.co.jp> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
OHMURA Kei
FUJITA Tomonori
parent
51b3b9a2bd
commit
3e74c789e9
237
ryu/lib/ofctl_v1_0.py
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237
ryu/lib/ofctl_v1_0.py
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# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import gevent
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from ryu.ofproto import ofproto_v1_0
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from ryu.lib.mac import haddr_to_bin, haddr_to_str
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LOG = logging.getLogger('ryu.lib.ofctl_v1_0')
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DEFAULT_TIMEOUT = 1.0 # TODO:XXX
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def to_actions(dp, acts):
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actions = []
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for a in acts:
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action_type = a.get('type')
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if action_type == 'OUTPUT':
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out_port = int(a.get('port', ofproto_v1_0.OFPP_NONE))
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actions.append(dp.ofproto_parser.OFPActionOutput(out_port))
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elif action_type == 'SET_VLAN_VID':
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vlan_vid = int(a.get('vlan_vid', 0xffff))
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actions.append(dp.ofproto_parser.OFPActionVlanVid(vlan_vid))
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elif action_type == 'SET_VLAN_PCP':
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vlan_pcp = int(a.get('vlan_pcp', 0))
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actions.append(dp.ofproto_parser.OFPActionVlanPcp(vlan_pcp))
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elif action_type == 'STRIP_VLAN':
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actions.append(dp.ofproto_parser.OFPActionStripVlan())
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elif action_type == 'SET_DL_SRC':
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dl_src = haddr_to_bin(a.get('dl_src'))
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actions.append(dp.ofproto_parser.OFPActionSetDlSrc(dl_src))
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elif action_type == 'SET_DL_DST':
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dl_dst = haddr_to_bin(a.get('dl_dst'))
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actions.append(dp.ofproto_parser.OFPActionSetDlDst(dl_dst))
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else:
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LOG.debug('Unknown action type')
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return actions
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def to_match(dp, attrs):
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ofp = dp.ofproto
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wildcards = ofp.OFPFW_ALL
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in_port = 0
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dl_src = 0
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dl_dst = 0
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dl_vlan = 0
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dl_vlan_pcp = 0
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dl_type = 0
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nw_tos = 0
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nw_proto = 0
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nw_src = 0
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nw_dst = 0
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tp_src = 0
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tp_dst = 0
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for key, value in attrs.items():
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if key == 'in_port':
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in_port = int(value)
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wildcards &= ~ofp.OFPFW_IN_PORT
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elif key == 'dl_src':
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dl_src = haddr_to_bin(value)
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wildcards &= ~ofp.OFPFW_DL_DST
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elif key == 'dl_dst':
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dl_dst = haddr_to_bin(value)
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wildcards &= ~ofp.OFPFW_DL_DST
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elif key == 'dl_vlan':
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dl_vlan = int(value)
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wildcards &= ~ofp.OFPFW_DL_VLAN
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elif key == 'dl_vlan_pcp':
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dl_vlan_pcp = int(value)
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wildcards &= ~ofp.OFPFW_DL_VLAN_PCP
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elif key == 'dl_type':
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dl_type = int(value)
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wildcards &= ~ofp.OFPFW_DL_TYPE
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elif key == 'nw_tos':
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nw_tos = int(value)
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wildcards &= ~ofp.OFPFW_NW_TOS
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elif key == 'nw_proto':
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nw_proto = int(value)
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wildcards &= ~ofp.OFPFW_NW_PROTO
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elif key == 'nw_src':
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pass
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elif key == 'nw_dst':
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pass
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elif key == 'tp_src':
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tp_src = int(value)
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wildcards &= ~ofp.OFPFW_TP_SRC
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elif key == 'tp_dst':
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tp_dst = int(value)
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wildcards &= ~ofp.OFPFW_TP_DST
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else:
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print "unknown match name ", key, value, len(key)
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match = dp.ofproto_parser.OFPMatch(
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wildcards, in_port, dl_src, dl_dst, dl_vlan, dl_vlan_pcp,
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dl_type, nw_tos, nw_proto, nw_src, nw_dst, tp_src, tp_dst)
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return match
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def send_stats_request(dp, stats, waiters, msgs):
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dp.set_xid(stats)
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waiters = waiters.setdefault(dp.id, {})
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lock = gevent.event.AsyncResult()
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waiters[stats.xid] = (lock, msgs)
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dp.send_msg(stats)
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try:
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lock.get(timeout=DEFAULT_TIMEOUT)
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except gevent.Timeout:
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del waiters[dp.id][stats.xid]
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def get_desc_stats(dp, waiters):
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stats = dp.ofproto_parser.OFPDescStatsRequest(dp, 0)
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msgs = []
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send_stats_request(dp, stats, waiters, msgs)
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for msg in msgs:
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stats = msg.body
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s = {'mfr_desc': stats.mfr_desc,
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'hw_desc': stats.hw_desc,
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'sw_desc': stats.sw_desc,
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'serial_num': stats.serial_num,
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'dp_desc': stats.dp_desc}
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desc = {str(dp.id): s}
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return desc
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def get_flow_stats(dp, waiters):
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match = dp.ofproto_parser.OFPMatch(
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dp.ofproto.OFPFW_ALL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
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stats = dp.ofproto_parser.OFPFlowStatsRequest(
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dp, 0, match, 0xff, dp.ofproto.OFPP_NONE)
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msgs = []
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send_stats_request(dp, stats, waiters, msgs)
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flows = []
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for msg in msgs:
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for stats in msg.body:
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s = {'priority': stats.priority,
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'cookie': stats.cookie,
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'idle_timeout': stats.idle_timeout,
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'hard_timeout': stats.hard_timeout,
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'match': {'dl_dst': haddr_to_str(stats.match.dl_dst),
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'dl_src': haddr_to_str(stats.match.dl_src),
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'dl_type': stats.match.dl_type,
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'dl_vlan': stats.match.dl_vlan,
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'dl_vlan_pcp': stats.match.dl_vlan_pcp,
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'in_port': stats.match.in_port,
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'nw_dst': stats.match.nw_dst,
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'nw_proto': stats.match.nw_proto,
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'nw_src': stats.match.nw_src,
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'tp_src': stats.match.tp_src,
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'tp_dst': stats.match.tp_dst},
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'byte_count': stats.byte_count,
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'duration_sec': stats.duration_sec,
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'duration_nsec': stats.duration_nsec,
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'packet_count': stats.packet_count,
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'table_id': stats.table_id}
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flows.append(s)
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flows = {str(dp.id): flows}
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return flows
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def get_port_stats(dp, waiters):
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stats = dp.ofproto_parser.OFPPortStatsRequest(
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dp, 0, dp.ofproto.OFPP_NONE)
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msgs = []
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send_stats_request(dp, stats, waiters, msgs)
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ports = []
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for msg in msgs:
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for stats in msg.body:
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s = {'port_no': stats.port_no,
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'rx_packets': stats.rx_packets,
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'tx_packets': stats.tx_packets,
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'rx_bytes': stats.rx_bytes,
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'tx_bytes': stats.tx_bytes,
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'rx_dropped': stats.rx_dropped,
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'tx_dropped': stats.tx_dropped,
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'rx_errors': stats.rx_errors,
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'tx_errors': stats.tx_errors,
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'rx_frame_err': stats.rx_frame_err,
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'rx_over_err': stats.rx_over_err,
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'rx_crc_err': stats.rx_crc_err,
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'collisions': stats.collisions}
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ports.append(s)
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ports = {str(dp.id): ports}
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return ports
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def push_flow_entry(dp, flow):
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cookie = int(flow.get('cookie', 0))
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priority = int(flow.get('priority',
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dp.ofproto.OFP_DEFAULT_PRIORITY))
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flags = int(flow.get('flags', 0))
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idle_timeout = int(flow.get('idle_timeout', 0))
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hard_timeout = int(flow.get('hard_timeout', 0))
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actions = to_actions(dp, flow.get('actions', {}))
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match = to_match(dp, flow.get('match', {}))
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flow_mod = dp.ofproto_parser.OFPFlowMod(
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datapath=dp, match=match, cookie=cookie,
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command=dp.ofproto.OFPFC_ADD, idle_timeout=idle_timeout,
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hard_timeout=hard_timeout, priority=priority, flags=flags,
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actions=actions)
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dp.send_msg(flow_mod)
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def delete_flow_entry(dp):
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match = dp.ofproto_parser.OFPMatch(
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dp.ofproto.OFPFW_ALL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
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flow_mod = dp.ofproto_parser.OFPFlowMod(
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datapath=dp, match=match, cookie=0,
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command=dp.ofproto.OFPFC_DELETE)
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dp.send_msg(flow_mod)
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