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find tunnel now searches on all host's interfaces

This commit is contained in:
itsikkes 2016-05-26 19:52:15 +03:00
parent 3990806d8c
commit 3dacde2f28
1 changed files with 35 additions and 34 deletions
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67
chaos_monkey/tunnel.py
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@ -20,11 +20,11 @@ DEFAULT_TIMEOUT = 10
QUIT_TIMEOUT = 60 * 10 # 10 minutes
def _set_multicast_socket(timeout=DEFAULT_TIMEOUT):
def _set_multicast_socket(timeout=DEFAULT_TIMEOUT, adapter=''):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.settimeout(timeout)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('', MCAST_PORT))
sock.bind((adapter, MCAST_PORT))
sock.setsockopt(socket.IPPROTO_IP,
socket.IP_ADD_MEMBERSHIP,
struct.pack("4sl", socket.inet_aton(MCAST_GROUP), socket.INADDR_ANY))
@ -32,43 +32,44 @@ def _set_multicast_socket(timeout=DEFAULT_TIMEOUT):
def find_tunnel(default=None, attempts=3, timeout=DEFAULT_TIMEOUT):
sock = _set_multicast_socket(timeout)
l_ips = local_ips()
for attempt in range(0, attempts):
try:
sock.sendto("?", (MCAST_GROUP, MCAST_PORT))
tunnels = []
if default:
tunnels.append(default)
for adapter in l_ips:
for attempt in range(0, attempts):
try:
LOG.info("Trying to find using adapter %s", adapter)
sock = _set_multicast_socket(timeout, adapter)
sock.sendto("?", (MCAST_GROUP, MCAST_PORT))
tunnels = []
if default:
tunnels.append(default)
while True:
try:
answer, address = sock.recvfrom(BUFFER_READ)
if answer not in ['?', '+', '-']:
tunnels.append(answer)
except socket.timeout:
break
while True:
try:
answer, address = sock.recvfrom(BUFFER_READ)
if answer not in ['?', '+', '-']:
tunnels.append(answer)
except socket.timeout:
break
for tunnel in tunnels:
if tunnel.find(':') != -1:
address, port = tunnel.split(':', 1)
if address in l_ips:
continue
for tunnel in tunnels:
if tunnel.find(':') != -1:
address, port = tunnel.split(':', 1)
if address in l_ips:
continue
LOG.debug("Checking tunnel %s:%s", address, port)
is_open, _ = check_port_tcp(address, int(port))
if not is_open:
LOG.debug("Could not connect to %s:%s", address, port)
continue
LOG.debug("Checking tunnel %s:%s", address, port)
is_open, _ = check_port_tcp(address, int(port))
if not is_open:
LOG.debug("Could not connect to %s:%s", address, port)
continue
sock.sendto("+", (address, MCAST_PORT))
sock.close()
return address, port
except Exception, exc:
LOG.debug("Caught exception in tunnel lookup: %s", exc)
continue
sock.sendto("+", (address, MCAST_PORT))
sock.close()
return address, port
except Exception, exc:
LOG.debug("Caught exception in tunnel lookup: %s", exc)
continue
return None