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from collections import defaultdict |
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from kytos.core.tag_ranges import range_difference |
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# Change to False so this script makes changes |
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DRY_RUN = True |
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# Modify with VLAN used in of_lldp |
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OF_LLDP_VLAN = 3799 |
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# Change to False to not print the missing VLANs |
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PRINT_MISSING = True |
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REMOVE_LLDP_FLOWS = False |
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def get_cookie(dpid): |
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"""Return the cookie integer given a dpid.""" |
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COOKIE_PREFIX = 0xab |
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return (0x0000FFFFFFFFFFFF & int(dpid.replace(":", ""), 16) | (COOKIE_PREFIX << 56)) |
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def send_flows(dpid, cookie): |
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import httpx |
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FLOW_MANAGER_URL = 'http://localhost:8181/api/kytos/flow_manager/v2' |
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url = f"{FLOW_MANAGER_URL}/flows/{dpid}" |
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data = {"flows": [{ |
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"cookie": cookie, |
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"cookie_mask": int(0xFFFFFFFFFFFFFFFF), |
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}], "force": True} |
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res = httpx.request("DELETE", url, json=data, timeout=10) |
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if res.is_server_error or res.status_code in {424, 404, 400}: |
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print(f"Error deleting LLDP flows from Switch {dpid}: {res.text}") |
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View Code Duplication |
def get_range(vlans, avoid) -> list[list[int]]: |
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"""Convert available_vlans to available_tags. |
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From list[int] to list[list[int]]""" |
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result = [] |
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if not vlans: |
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return result |
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vlans.sort() |
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i = 0 |
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while i < len(vlans): |
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if vlans[i] in avoid: |
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i += 1 |
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else: |
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break |
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if not vlans[i:]: |
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return result |
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start = end = vlans[i] |
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for tag in vlans[i+1:]: |
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if tag in avoid: |
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continue |
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if tag == end + 1: |
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end = tag |
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else: |
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result.append([start, end]) |
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start = end = tag |
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result.append([start, end]) |
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return result |
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mef_eline = controller.napps[('kytos', 'mef_eline')] |
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evcs = {evc_id: evc.as_dict() for evc_id, evc in mef_eline.circuits.items() if not evc.archived} |
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in_use_tags = defaultdict(set) |
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for evc_id, evc in evcs.items(): |
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for link in evc["current_path"]: |
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svlan = link["metadata"]["s_vlan"]["value"] |
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intfa = link["endpoint_a"]["id"] |
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intfb = link["endpoint_b"]["id"] |
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in_use_tags[intfa].add(svlan) |
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in_use_tags[intfb].add(svlan) |
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for link in evc["failover_path"]: |
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svlan = link["metadata"]["s_vlan"]["value"] |
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intfa = link["endpoint_a"]["id"] |
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intfb = link["endpoint_b"]["id"] |
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in_use_tags[intfa].add(svlan) |
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in_use_tags[intfb].add(svlan) |
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for uni in ("uni_a", "uni_z"): |
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intf_id = evc[uni]["interface_id"] |
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View Code Duplication |
if ( |
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"tag" in evc[uni] |
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and evc[uni]["tag"] |
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and "tag_type" in evc[uni]["tag"] |
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and evc[uni]["tag"]["tag_type"] in ("vlan", 1) |
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): |
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tag = evc[uni]["tag"]["value"] |
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if isinstance(tag, int): |
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in_use_tags[intf_id].add(tag) |
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elif isinstance(tag, list): |
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for tag_item in tag: |
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if isinstance(tag_item, int): |
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in_use_tags[intf_id].add(tag_item) |
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elif isinstance(tag_item, list) and len(tag_item) == 1: |
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in_use_tags[intf_id].add(tag_item[0]) |
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elif isinstance(tag_item, list) and len(tag_item) == 2: |
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for val in range(tag_item[0], tag_item[1]+1): |
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in_use_tags[intf_id].add(val) |
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switch_rm_flows = {} |
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for dpid in list(controller.switches.keys()): |
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switch = controller.get_switch_by_dpid(dpid) |
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of_lldp_cookie = get_cookie(switch.id) |
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of_lldp_flow = False |
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for flow in switch.flows.copy(): |
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if of_lldp_cookie == flow.cookie: |
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of_lldp_flow = True |
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break |
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if not switch.is_enabled() and of_lldp_flow: |
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print(f"WARNING -> Switch {dpid} is disabled and has LLDP flows.") |
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if REMOVE_LLDP_FLOWS: |
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switch_rm_flows[dpid] = of_lldp_cookie |
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109
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for interface in switch.interfaces.copy().values(): |
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intf_id = interface.id |
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vlans = in_use_tags.get(intf_id, set()) |
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if OF_LLDP_VLAN and switch.is_enabled() and of_lldp_flow: |
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vlans.add(OF_LLDP_VLAN) |
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vlans = get_range(sorted(list(vlans)), set()) |
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intf = controller.get_interface_by_id(intf_id) |
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tag_range = intf.tag_ranges["vlan"] |
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available_tags = range_difference(tag_range, vlans) |
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if intf.available_tags["vlan"] != available_tags: |
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print(f"Missing available tags in interface {intf_id}:\n" |
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f"WRONG -> {intf.available_tags['vlan']}\n" |
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f"CORRECT -> {available_tags}") |
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if PRINT_MISSING: |
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print(f"MISSING -> {range_difference(available_tags, intf.available_tags['vlan'])}") |
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if not DRY_RUN: |
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intf.make_tags_available(controller, available_tags, 'vlan') |
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print("\n") |
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128
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# Removing flows if REMOVE_LLDP_FLOWS is True |
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for dpid, cookie in switch_rm_flows.items(): |
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send_flows(dpid, cookie) |
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kytos-ng /
topology
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