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Correctly parse aspath for both bird 1.x and 2.0

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tamihiro 2019-03-25 19:39:00 +09:00
parent 2ce03ebbb0
commit 5f98a3530c
1 changed files with 20 additions and 9 deletions
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29
lg.py
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@ -538,21 +538,29 @@ def build_as_tree_from_raw_bird_ouput(host, proto, text):
path = None
paths = []
net_dest = None
peer_protocol_name = None
for line in text:
line = line.strip()
expr = re.search(r'(.*)via\s+([0-9a-fA-F:\.]+)\s+on.*\[(\w+)\s+', line)
expr = re.search(r'(.*)unicast\s+\[(\w+)\s+', line)
if expr:
if expr.group(1).strip():
net_dest = expr.group(1).strip()
peer_protocol_name = expr.group(2).strip()
expr2 = re.search(r'(.*)via\s+([0-9a-fA-F:\.]+)\s+on\s+\w+(\s+\[(\w+)\s+)?', line)
if expr2:
if path:
path.append(net_dest)
paths.append(path)
path = None
if expr.group(1).strip():
net_dest = expr.group(1).strip()
if expr2.group(1).strip():
net_dest = expr2.group(1).strip()
peer_ip = expr.group(2).strip()
peer_protocol_name = expr.group(3).strip()
peer_ip = expr2.group(2).strip()
if expr2.group(4):
peer_protocol_name = expr2.group(4).strip()
# Check if via line is a internal route
for rt_host, rt_ips in app.config["ROUTER_IP"].iteritems():
# Special case for internal routing
@ -564,15 +572,18 @@ def build_as_tree_from_raw_bird_ouput(host, proto, text):
path = [ peer_protocol_name ]
# path = ["%s\r%s" % (peer_protocol_name, get_as_name(get_as_number_from_protocol_name(host, proto, peer_protocol_name)))]
expr2 = re.search(r'(.*)unreachable\s+\[(\w+)\s+', line)
if expr2:
expr3 = re.search(r'(.*)unreachable\s+\[(\w+)\s+', line)
if expr3:
if path:
path.append(net_dest)
paths.append(path)
path = None
if expr2.group(1).strip():
net_dest = expr2.group(1).strip()
if path is None:
path = [ expr3.group(2).strip() ]
if expr3.group(1).strip():
net_dest = expr3.group(1).strip()
if line.startswith("BGP.as_path:"):
path.extend(line.replace("BGP.as_path:", "").strip().split(" "))