def install_available_paths(prefix, config, ip):
if config != "EMPTY":
asn = ip_bgp_data.ip_to_asn(ip)
available_paths_list = []
available_paths = config.split("!")
for i, path in enumerate(available_paths):
available_paths_list.append(path)
available_paths_list.sort()
router_paths[prefix][asn][ip]["available_paths"] = "!".join(
available_paths_list)
else:
router_paths[prefix][asn][ip]["available_paths"] = "-"
def install_all_paths(prefix, config, ip):
if config != "EMPTY":
asn = ip_bgp_data.ip_to_asn(ip)
paths = config.split(":")
router_paths[prefix][asn][ip]["best_path"] = paths[0]
if asn == ip_bgp_data.local_asn:
current_path[prefix] = paths[0]
available_paths_list = []
available_paths = paths[1].split("!")
for i, path in enumerate(available_paths):
available_paths_list.append(path)
available_paths_list.sort()
router_paths[prefix][asn][ip]["available_paths"] = "!".join(
available_paths_list)
else:
router_paths[prefix][asn][ip]["best_path"] = "-"
router_paths[prefix][asn][ip]["available_paths"] = "-"
def get_bgp_trace(trace):
trace_split = trace.split('\n')[:-2] # remove trailing newlines
last_asn = ip_bgp_data.local_asn
last_latency = 0.0
bgp_data = []
bgp_trace = [last_asn]
latency = 0.0
# parse every line in the trace
for trace_line in trace_split:
hop = parse_trace_line(trace_line).split("_")
if hop[0] == "N/A":
continue
else:
asn = ip_bgp_data.ip_to_asn(hop[0])
bgp_trace.append(asn)
if asn != "*":
latency = float(hop[1])
if asn != last_asn and last_asn != "*":
bgp_data.append([last_asn, asn, latency - last_latency])
last_latency = latency
last_asn = asn
bgp_trace_filtered = [x[0] for x in itertools.groupby(bgp_trace)]
bgp_trace_str = " ".join(bgp_trace_filtered)
#if "*" in bgp_trace_str:
#print bgp_trace_str + ": " + trace
return [bgp_data, bgp_trace_str, latency]
if paths == "-":
paths = ""
paths += as_path + "!"
if paths == "-":
return paths
else:
return paths[:-1]
else:
return "EMPTY"
if __name__ == '__main__':
FLAGS = parse_FLAGS()
print "forwarder_rcvd.py started"
asn = ip_bgp_data.ip_to_asn(FLAGS.src_ip)
if asn == "*":
print "src_ip does not belong to an AS, exiting..."
sys.exit(1)
# create socket for sending data to localhost
forward_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# read from file continuously as new data is added
process = subprocess.Popen(["tail", "-n", "0", "-F", FLAGS.logfile], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
while True:
# read logfile line, and get the relevant portion of it. example lines:
# Announcement example: 2016/07/04 10:05:34.326 BGP: 20.0.3.2 rcvd UPDATE w/ attr: nexthop 20.0.3.2, origin i, path 900 1000 1100 1200 800
# 2016/07/04 10:05:34.326 BGP: 20.0.3.2 rcvd 10.0.8.0/24
# Withdrawal example: 2016/07/04 10:48:05.088 BGP: 20.0.1.2 rcvd UPDATE about 10.0.3.0/24 -- withdrawn
else:
best_path = as_path
if paths == "-":
return best_path + ":" + paths
else:
return best_path + ":" + paths[:-1]
else:
return "EMPTY"
if __name__ == '__main__':
FLAGS = parse_flags()
print "get_paths.py started"
asn = ip_bgp_data.ip_to_asn(FLAGS.src_ip)
if asn == "*":
print "src_ip does not belong to an AS, exiting..."
sys.exit(1)
# create socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server_socket.bind((FLAGS.src_ip, FLAGS.src_port))
# receive requests
while True:
try:
data, (ip, port) = server_socket.recvfrom(1024)
if data:
}
current_path[prefix] = "-"
previous_path[prefix] = "-"
last_updates[prefix] = {}
last_updates_local[prefix] = {}
path_decisions[prefix] = {}
if prefix not in router_paths:
router_paths[prefix] = {}
for asn in FLAGS.used_ases:
last_updates[prefix][asn] = []
last_updates_local[prefix][asn] = []
for ip in FLAGS.routers:
asn = ip_bgp_data.ip_to_asn(ip)
if asn not in router_paths[prefix]:
router_paths[prefix][asn] = {}
router_paths[prefix][asn][ip] = {
"best_path": "-",
"available_paths": "-"
}
print "added prefix \"" + prefix + "\""
# initialize sockets
upstream_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
upstream_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
upstream_socket.bind((FLAGS.src_ip, FLAGS.forwarder_port))