import urllib2import jsondef get_all_switches():url = ":8080/v1.0/topology/switches"req = urllib2.Request(url)res_data = urllib2.urlopen(req)res = res_data.read()res = json.loads(res)return resdef get_all_links():url = ":8080/v1.0/topology/links"req = urllib2.Request(url)res_data = urllib2.urlopen(req)res = res_data.read()res = json.loads(res)return resdef get_switch(dpid):url = ":8080/v1.0/topology/switches/" + dpidreq = urllib2.Request(url)res_data = urllib2.urlopen(req)res = res_data.read()res = json.loads(res)return resdef get_flow_entries(dpid):url = ":8080/stats/flow/" + dpidreq = urllib2.Request(url)res_data = urllib2.urlopen(req)res = res_data.read()res = json.loads(res)return resdef add_flow_entry(dpid,match,priority,actions):url = ":8080/stats/flowentry/add"post_data = "{'dpid':%s,'match':%s,'priority':%s,'actions':%s}" % (dpid,str(match),priority,str(actions))req = urllib2.Request(url,post_data)res = urllib2.urlopen(req)return res.getcode()def delete_flow_entry(dpid, match=None, priority=None, actions=None):url = ":8080/stats/flowentry/delete"post_data = "{'dpid':%s" % dpidif match is not None:post_data += ",'match':%s" % str(match)if priority is not None:post_data += ",'priority':%s" % priorityif actions is not None:post_data += ",'actions':%s" % str(actions)post_data += "}"req = urllib2.Request(url,post_data)res = urllib2.urlopen(req)return res.getcode()
函数说明：
#get_all_switches()参数：无返回结果：一个包含所有交换机信息的列表结果示例：[{"ports": [{"hw_addr": "12:ad:47:17:6d:1d", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, {"hw_addr": "62:bf:89:79:68:67", "name": "s1-eth2", "port_no": "00000002", "dpid": "0000000000000001"}], "dpid": "0000000000000001"}, {"ports": [{"hw_addr": "da:d7:cb:f8:a4:7f", "name": "s2-eth1", "port_no": "00000001", "dpid": "0000000000000002"}, {"hw_addr": "ce:31:74:a1:c1:2d", "name": "s2-eth2", "port_no": "00000002", "dpid": "0000000000000002"}], "dpid": "0000000000000002"}, {"ports": [{"hw_addr": "ea:c5:e8:ee:72:f7", "name": "s3-eth1", "port_no": "00000001", "dpid": "0000000000000003"}, {"hw_addr": "da:57:80:b2:74:67", "name": "s3-eth2", "port_no": "00000002", "dpid": "0000000000000003"}], "dpid": "0000000000000003"}]#get_all_links()参数：无返回结果：一个包含所有链路信息的列表结果示例：[{"src": {"hw_addr": "12:ad:47:17:6d:1d", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, "dst": {"hw_addr": "da:d7:cb:f8:a4:7f", "name": "s2-eth1", "port_no": "00000001", "dpid": "0000000000000002"}}, {"src": {"hw_addr": "ea:c5:e8:ee:72:f7", "name": "s3-eth1", "port_no": "00000001", "dpid": "0000000000000003"}, "dst": {"hw_addr": "ce:31:74:a1:c1:2d", "name": "s2-eth2", "port_no": "00000002", "dpid": "0000000000000002"}}, {"src": {"hw_addr": "da:d7:cb:f8:a4:7f", "name": "s2-eth1", "port_no": "00000001", "dpid": "0000000000000002"}, "dst": {"hw_addr": "12:ad:47:17:6d:1d", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}}, {"src": {"hw_addr": "ce:31:74:a1:c1:2d", "name": "s2-eth2", "port_no": "00000002", "dpid": "0000000000000002"}, "dst": {"hw_addr": "ea:c5:e8:ee:72:f7", "name": "s3-eth1", "port_no": "00000001", "dpid": "0000000000000003"}}]#get_switch(dpid)参数：dpid为字符串，比如"0000000000000001"返回结果：一个包含dpid对应的交换机的信息的列表结果示例：[{"ports": [{"hw_addr": "12:ad:47:17:6d:1d", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, {"hw_addr": "62:bf:89:79:68:67", "name": "s1-eth2", "port_no": "00000002", "dpid": "0000000000000001"}], "dpid": "0000000000000001"}]#get_flow_entries(dpid)参数：dpid为字符串，，比如"0000000000000001"返回结果：一个包含流表项的字典结果示例：{"1": [{"actions": ["OUTPUT:65533"], "idle_timeout": 0, "cookie": 0, "packet_count": 2252, "hard_timeout": 0, "byte_count": 114852, "duration_nsec": 370000000, "priority": 65535, "duration_sec": 2026, "table_id": 0, "match": {"dl_type": 35020, "nw_dst": "0.0.0.0", "dl_vlan_pcp": 0, "dl_src": "00:00:00:00:00:00", "nw_tos": 0, "tp_src": 0, "dl_vlan": 0, "nw_src": "0.0.0.0", "nw_proto": 0, "tp_dst": 0, "dl_dst": "01:80:c2:00:00:0e", "in_port": 0}}, {"actions": ["OUTPUT:2"], "idle_timeout": 0, "cookie": 0, "packet_count": 0, "hard_timeout": 0, "byte_count": 0, "duration_nsec": 864000000, "priority": 1111, "duration_sec": 104, "table_id": 0, "match": {"dl_type": 0, "nw_dst": "0.0.0.0", "dl_vlan_pcp": 0, "dl_src": "00:00:00:00:00:00", "nw_tos": 0, "tp_src": 0, "dl_vlan": 0, "nw_src": "0.0.0.0", "nw_proto": 0, "tp_dst": 0, "dl_dst": "00:00:00:00:00:00", "in_port": 1}}]}其中开头的“1”表示dpid号#add_flow_entry(dpid,match,priority,actions)参数：dpid为字符串，比如"0000000000000001"match为字典，比如match = {"in_port":00000001}，其他键的名称见《ryu Documentation》P161的Flow Match Structurepriority为字符串，比如"1111" actions为列表，比如actions = [{"type":"OUTPUT","port":00000002}]，其他元素名称见《ryu Documentation》P282的actions返回结果：整数，HTTP状态码,200表示添加流表项成功结果示例：200,403,404#delete_flow_entry(dpid,match,priority,actions)参数：dpid为字符串，比如"0000000000000001"match为字典，比如match = {"in_port":00000001}，其他键的名称见《ryu Documentation》P161的Flow Match Structurepriority为字符串，比如"1111" actions为列表，比如actions = [{"type":"OUTPUT","port":00000002}]，其他元素名称见《ryu Documentation》P282的actions返回结果：整数，HTTP状态码，200表示删除流表项成功结果示例：200,403,404
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