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https://gitlab.nic.cz/labs/bird.git
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Python CLI Package: Fully parsing 'show protocols all'
This commit is contained in:
Maria Matejka
parent
04f96b6705
commit
3eae4a4eb6
@ -1,10 +1,11 @@
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import asyncio
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import re
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from BIRD.Basic import Basic, BIRDException, Code
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class ProtocolException(Exception):
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def __init__(self, msg):
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Exception.__init__(self, f"Failed to parse protocol {self.protocol_name}: {msg}")
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Exception.__init__(self, f"Failed to parse protocol: {msg}")
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class ProtocolListException(Exception):
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def __init__(self, msg):
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@ -21,8 +22,46 @@ class ProtocolList(Basic):
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ProtocolList.match[sub.match] = sub
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class UpdateState:
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def __init__(self, plist):
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self.plist = plist
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self.current = None
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self.data = {}
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self.parse_dispatch = {
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Code.ProtocolInfo: self.parse_info,
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Code.ProtocolDetails: self.parse_details,
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}
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def parse_info(self, data):
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kwargs = Protocol.parse_info(data)
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if (name := kwargs["name"]) in self.data:
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raise ProtocolListException(f"Duplicate protocol {name}")
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if (m := kwargs["match"]) in self.plist.match:
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del kwargs["match"]
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kwargs["bird"] = self.plist.bird
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p = self.plist.match[m](**kwargs)
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self.data[name] = p
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self.current = p
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else:
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raise ProtocolListException(f"Unknown protocol kind {m}")
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def parse_details(self, data):
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if self.current is None:
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raise ProtocolListException(f"Protocol details without protocol: {m}")
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# print({"name":self.current.name, "data":data})
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if self.current.parse_details(data) == Protocol.LastDetail:
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self.current = None
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async def update(self):
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self.data = {}
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state = self.UpdateState(self)
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await self.bird.cli.open()
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data = await self.bird.cli.socket.command("show protocols all")
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@ -36,29 +75,33 @@ class ProtocolList(Basic):
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data.pop(0)
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if data[-1] != { "code": Code.OK, "data": "" }:
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raise ProtocolListException(f"Strange protocol list footer: {data[-1]}")
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data.pop()
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for line in data:
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if line["code"] == Code.ProtocolInfo:
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kwargs = Protocol.parse_info(line["data"])
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if (name := kwargs["name"]) in self.data:
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raise ProtocolListException(f"Duplicate protocol {name}")
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if (m := kwargs["match"]) in self.match:
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del kwargs["match"]
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kwargs["bird"] = self.bird
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self.data[name] = self.match[m](**kwargs)
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else:
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raise ProtocolListException(f"Unknown protocol kind {m}")
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state.parse_dispatch[line["code"]](line["data"])
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self.data = state.data
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class Protocol(Basic):
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known_states = set(("down", "start", "up"))
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def __init__(self, name, state, last_change, info, **kwargs):
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super().__init__(**kwargs)
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self.name = name
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if state not in self.known_states:
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raise ProtocolListException(f"Strange protocol {name} state: {state}")
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self.state = state
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self.last_change = last_change
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self.info = info
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self.channels = {}
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class LastDetail:
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pass
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def parse_info(data):
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s = data.split(maxsplit=5) + [None]
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@ -73,6 +116,129 @@ class Protocol(Basic):
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s
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))
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def parse_details(self, data):
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if data == '':
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return Protocol.LastDetail
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if data.startswith(channel_prefix := " Channel "):
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if (channel_name := data[len(channel_prefix):]) in self.channels:
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raise ProtocolException(f"Duplicate channel {channel_name} in {self.name}")
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c = Channel(name=channel_name, protocol=self, bird=self.bird)
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self.current_child = c
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self.channels[channel_name] = c
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return None
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if data.startswith(" "):
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if self.current_child is None:
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raise ProtocolException(f"Child details without child header in {self.name}: {data}")
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self.current_child.parse_details(data[4:])
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return None
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raise ProtocolException(f"unknown details: {data}")
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async def disable(self):
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await self.bird.cli.open()
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await self.bird.cli.socket.command(f"disable {self.name}")
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async def enable(self):
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await self.bird.cli.open()
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await self.bird.cli.socket.command(f"enable {self.name}")
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class Channel(Basic):
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known_states = set(("DOWN", "START", "UP", "FLUSHING"))
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def __init__(self, name, protocol, **kwargs):
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super().__init__(**kwargs)
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self.name = name
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self.protocol = protocol
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self.state = None
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self.table = None
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self.preference = None
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self.import_filter = None
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self.export_filter = None
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self.route_stats = None
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self.route_change_stats = None
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self.details_dispatch = {
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"State": self.parse_state,
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"Table": self.parse_table,
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"Preference": self.parse_preference,
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"Input filter": self.parse_import_filter,
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"Output filter": self.parse_export_filter,
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"Routes": self.parse_route_stats,
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"Route change stats": self.parse_route_change_stats_header,
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" Import updates": lambda data: self.parse_route_change_stats_data("import updates", data),
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" Import withdraws": lambda data: self.parse_route_change_stats_data("import withdraws", data),
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" Export updates": lambda data: self.parse_route_change_stats_data("export updates", data),
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" Export withdraws": lambda data: self.parse_route_change_stats_data("export withdraws", data),
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}
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def parse_details(self, data):
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k, v = data.split(":", maxsplit=1)
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self.details_dispatch[k](v.strip())
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def parse_state(self, data):
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if self.state is not None:
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raise ProtocolException(f"Duplicit channel {self.name} state in {self.protocol.name}: {data}")
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if data not in self.known_states:
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raise ProtocolException(f"Unknown channel {self.name} state in {self.protocol.name}: {data}")
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self.state = data
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def parse_table(self, data):
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if self.table is not None:
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raise ProtocolException(f"Duplicit channel {self.name} table in {self.protocol.name}: {data}")
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self.table = data
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def parse_preference(self, data):
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if self.preference is not None:
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raise ProtocolException(f"Duplicit channel {self.name} preference in {self.protocol.name}: {data}")
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self.preference = int(data)
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def parse_import_filter(self, data):
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if self.import_filter is not None:
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raise ProtocolException(f"Duplicit channel {self.name} import filter in {self.protocol.name}: {data}")
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self.import_filter = data
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def parse_export_filter(self, data):
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if self.export_filter is not None:
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raise ProtocolException(f"Duplicit channel {self.name} export filter in {self.protocol.name}: {data}")
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self.export_filter = data
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def parse_route_stats(self, data):
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if self.route_stats is not None:
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raise ProtocolException(f"Duplicit channel {self.name} route stats in {self.protocol.name}: {data}")
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if (m := re.fullmatch("(?P<imported>[0-9]+) imported, (?P<exported>[0-9]+) exported, (?P<preferred>[0-9]+) preferred", data)) is None:
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raise ProtocolException(f"Malformed route stats of channel {self.name} in {self.protocol.name}: {data}")
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self.route_stats = m.groupdict()
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def parse_route_change_stats_header(self, data):
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if self.route_change_stats is not None:
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raise ProtocolException(f"Duplicit channel {self.name} route change stats in {self.protocol.name}: {data}")
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self.route_change_stats_headers = data.split()
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self.route_change_stats = {}
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# print(self.route_change_stats_headers)
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def parse_route_change_stats_data(self, key, data):
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if self.route_change_stats is None:
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raise ProtocolException(f"Route change stats data without header in channel {self.name} in {self.protocol.name}: {data}")
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if key in self.route_change_stats:
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raise ProtocolException(f"Duplicit channel {self.name} route change stats data line {key} in {self.protocol.name}: {data}")
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d = [ None if k == "---" else int(k) for k in data.split() ]
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if len(d) != (hl := len(self.route_change_stats_headers)):
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raise ProtocolException(f"Route change data (len={len(d)}) not matching its header (len={hl}) in channel {self.name} in {self.protocol.name}: {data}")
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self.route_change_stats[key] = dict(zip(self.route_change_stats_headers, d))
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# print(key)
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# print(self.route_change_stats)
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import BIRD.Protocol.Kernel
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import BIRD.Protocol.Babel
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import BIRD.Protocol.RAdv
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