Commit 0fbb25c0 authored by Dimitris Aragiorgis's avatar Dimitris Aragiorgis

Nice logging

Signed-off-by: default avatarDimitris Aragiorgis <dimara@grnet.gr>
parent 3cbc1569
......@@ -123,15 +123,15 @@ def get_indev(payload):
try:
indev_ifindex = payload.get_physindev()
if indev_ifindex:
logging.debug("Incomming packet from bridge %s", indev_ifindex)
logging.debug(" - Incomming packet from bridge %s", indev_ifindex)
return indev_ifindex
except AttributeError:
#TODO: return error value
logging.debug("No get_physindev supported")
logging.debug("No get_physindev() supported")
return 0
indev_ifindex = payload.get_indev()
logging.debug("Incomming packet from tap %s", indev_ifindex)
logging.debug(" - Incomming packet from tap %s", indev_ifindex)
return indev_ifindex
......@@ -139,14 +139,15 @@ def get_indev(payload):
def get_binding(proxy, ifindex, mac):
try:
if proxy.mac_indexed_clients:
logging.debug("Getting binding for mac %s", mac)
logging.debug(" - Getting binding for mac %s", mac)
b = proxy.clients[mac]
else:
logging.debug("Getting binding for ifindex %s", ifindex)
logging.debug(" - Getting binding for ifindex %s", ifindex)
b = proxy.clients[ifindex]
return b
except KeyError:
logging.debug("No client found for mac/ifindex %s/%s", mac, ifindex)
logging.debug(" - No client found for mac / ifindex %s / %s",
mac, ifindex)
return None
......@@ -158,7 +159,7 @@ def parse_binding_file(path):
try:
iffile = open(path, 'r')
except EnvironmentError, e:
logging.warn("Unable to open binding file %s: %s", path, str(e))
logging.warn(" - Unable to open binding file %s: %s", path, str(e))
return None
tap = os.path.basename(path)
......@@ -203,7 +204,7 @@ def parse_binding_file(path):
indev=indev, subnet=subnet, gateway=gateway,
subnet6=subnet6, gateway6=gateway6, eui64=eui64 )
except ValueError:
logging.warning("Cannot add client for host %s and IP %s on tap %s",
logging.warning(" - Cannot add client for host %s and IP %s on tap %s",
hostname, ip, tap)
return None
......@@ -257,7 +258,7 @@ class Subnet(object):
try:
self.net = IPy.IP(net)
except ValueError, e:
logging.warning("IPy error: %s", e)
logging.warning(" - IPy error: %s", e)
raise e
else:
self.net = net
......@@ -386,7 +387,7 @@ class VMNetProxy(object): # pylint: disable=R0902
s = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, ETH_P_ALL)
s.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
except socket.error, e:
logging.warning("Cannot open socket %s", e)
logging.warning(" - Cannot open socket %s", e)
return s
def _cleanup(self):
......@@ -395,17 +396,17 @@ class VMNetProxy(object): # pylint: disable=R0902
"""
logging.info("Cleaning up")
logging.debug("Closing netfilter queues")
logging.debug(" - Closing netfilter queues")
for q in self.nfq.values():
q.close()
logging.debug("Closing socket")
logging.debug(" - Closing socket")
self.l2socket.close()
logging.debug("Stopping inotify watches")
logging.debug(" - Stopping inotify watches")
self.notifier.stop()
logging.info("Cleanup finished")
logging.info(" - Cleanup finished")
def _setup_nfqueue(self, queue_num, family, callback):
logging.info("Setting up NFQUEUE for queue %d, AF %s",
......@@ -413,11 +414,11 @@ class VMNetProxy(object): # pylint: disable=R0902
q = nfqueue.queue()
q.set_callback(callback)
q.fast_open(queue_num, family)
q.set_queue_maxlen(5000)
q.set_queue_maxlen(30)
# This is mandatory for the queue to operate
q.set_mode(nfqueue.NFQNL_COPY_PACKET)
self.nfq[q.get_fd()] = q
logging.debug("Successfully set up NFQUEUE %d", queue_num)
logging.debug(" - Successfully set up NFQUEUE %d", queue_num)
def sendp(self, data, dev):
""" Send a raw packet using a layer-2 socket
......@@ -426,21 +427,21 @@ class VMNetProxy(object): # pylint: disable=R0902
if isinstance(data, BasePacket):
data = str(data)
logging.debug("Sending raw packet %r", data)
logging.debug(" - Sending raw packet %s", data)
self.l2socket.bind((dev, ETH_P_ALL))
try:
count = self.l2socket.send(data, socket.MSG_DONTWAIT)
except socket.error, e:
logging.warn("Send with MSG_DONTWAIT failed: %s", str(e))
logging.warn(" - Send with MSG_DONTWAIT failed: %s", str(e))
self.l2socket.close()
self.l2socket = self._socket()
raise e
ldata = len(data)
logging.debug("Sent %d bytes to device %s", count, dev)
logging.debug(" - Sent %d bytes to device %s", count, dev)
if count != ldata:
logging.warn("Truncated send on %s (%d/%d bytes sent)",
logging.warn(" - Truncated send on %s (%d/%d bytes sent)",
dev, count, ldata)
def build_config(self):
......@@ -457,7 +458,7 @@ class VMNetProxy(object): # pylint: disable=R0902
""" Get the interface index from sysfs
"""
logging.debug("Getting ifindex for interface %s from sysfs", iface)
logging.debug(" - Getting ifindex for interface %s from sysfs", iface)
path = os.path.abspath(os.path.join(SYSFS_NET, iface, "ifindex"))
if not path.startswith(SYSFS_NET):
......@@ -468,7 +469,7 @@ class VMNetProxy(object): # pylint: disable=R0902
try:
f = open(path, 'r')
except EnvironmentError:
logging.debug("%s is probably down, removing", iface)
logging.debug(" - %s is probably down, removing", iface)
self.remove_tap(iface)
return ifindex
......@@ -478,10 +479,10 @@ class VMNetProxy(object): # pylint: disable=R0902
try:
ifindex = int(ifindex)
except ValueError, e:
logging.warn("Failed to get ifindex for %s, cannot parse sysfs"
" output '%s'", iface, ifindex)
logging.warn(" - Failed to get ifindex for %s, cannot parse"
" sysfs output '%s'", iface, ifindex)
except EnvironmentError, e:
logging.warn("Error reading %s's ifindex from sysfs: %s",
logging.warn(" - Error reading %s's ifindex from sysfs: %s",
iface, str(e))
self.remove_tap(iface)
finally:
......@@ -493,7 +494,7 @@ class VMNetProxy(object): # pylint: disable=R0902
""" Get the interface hardware address from sysfs
"""
logging.debug("Getting mac for iface %s", iface)
logging.debug(" - Getting mac for iface %s", iface)
path = os.path.abspath(os.path.join(SYSFS_NET, iface, "address"))
if not path.startswith(SYSFS_NET):
return None
......@@ -502,14 +503,14 @@ class VMNetProxy(object): # pylint: disable=R0902
try:
f = open(path, 'r')
except EnvironmentError:
logging.debug("%s is probably down, removing", iface)
logging.debug(" - %s is probably down, removing", iface)
self.remove_tap(iface)
return addr
try:
addr = f.readline().strip()
except EnvironmentError, e:
logging.warn("Failed to read hw address for %s from sysfs: %s",
logging.warn(" - Failed to read hw address for %s from sysfs: %s",
iface, str(e))
finally:
f.close()
......@@ -529,15 +530,15 @@ class VMNetProxy(object): # pylint: disable=R0902
ifindex = self.get_ifindex(b.tap)
if ifindex is None:
logging.warn("Stale configuration for %s found", tap)
logging.warn(" - Stale configuration for %s found", tap)
else:
if b.is_valid():
if self.mac_indexed_clients:
self.clients[b.mac] = b
else:
self.clients[ifindex] = b
logging.debug("Added client:")
logging.debug("%5s: %10s %20s %7s %15s",
logging.debug(" - Added client:")
logging.debug(" + %5s: %10s %20s %7s %15s",
ifindex, b.hostname, b.mac, b.tap, b.ip)
def remove_tap(self, tap):
......@@ -549,8 +550,8 @@ class VMNetProxy(object): # pylint: disable=R0902
b = self.clients[k]
if self.clients[k].tap == tap:
logging.debug("Removing client on interface %s", tap)
logging.debug("%10s %20s %7s %15s",
b.hostname, b.mac, b.tap, b.ip)
logging.debug(" - %5s: %10s %20s %7s %15s",
k, b.hostname, b.mac, b.tap, b.ip)
del self.clients[k]
except:
logging.debug("Client on %s disappeared!!!", tap)
......@@ -559,9 +560,9 @@ class VMNetProxy(object): # pylint: disable=R0902
""" Generate a reply to bnetfilter-queue-deva BOOTP/DHCP request
"""
logging.debug(" * Processing pending DHCP request (NFQUEUE %d)", i)
# Decode the response - NFQUEUE relays IP packets
pkt = IP(payload.get_data())
logging.debug("Generating DHCP response")
#logging.debug(pkt.show())
# Get the client MAC address
......@@ -580,7 +581,7 @@ class VMNetProxy(object): # pylint: disable=R0902
if binding is None:
# We don't know anything about this interface, so accept the packet
# and return
logging.debug("Ignoring DHCP request on unknown iface %d", indev)
logging.debug(" - Ignoring DHCP request on unknown iface %s", indev)
# We don't know what to do with this packet, so let the kernel
# handle it
payload.set_verdict(nfqueue.NF_ACCEPT)
......@@ -590,17 +591,20 @@ class VMNetProxy(object): # pylint: disable=R0902
payload.set_verdict(nfqueue.NF_DROP)
if mac != binding.mac:
logging.warn("Received spoofed DHCP request for mac %s, tap %s",
mac, indev)
logging.warn(" - Recieved spoofed DHCP request for mac %s from tap %s", mac, indev)
return
logging.debug(" - Generating DHCP response for host %s (mac %s) on tap %s",
binding.hostname, mac, binding.tap)
resp = Ether(dst=mac, src=self.get_iface_hw_addr(binding.indev))/\
IP(src=DHCP_DUMMY_SERVER_IP, dst=binding.ip)/\
UDP(sport=pkt.dport, dport=pkt.sport)/resp
subnet = binding.net
if not DHCP in pkt:
logging.warn("Invalid request from %s on %s, no DHCP"
logging.warn(" - Invalid request from %s on %s, no DHCP"
" payload found", binding.mac, binding.tap)
return
......@@ -612,7 +616,7 @@ class VMNetProxy(object): # pylint: disable=R0902
if type(opt) is tuple and opt[0] == "requested_addr":
requested_addr = opt[1]
logging.info("%s from %s on %s", DHCP_TYPES.get(req_type, "UNKNOWN"),
logging.info(" - %s from %s on %s", DHCP_TYPES.get(req_type, "UNKNOWN"),
binding.mac, binding.tap)
if self.dhcp_domain:
......@@ -622,7 +626,7 @@ class VMNetProxy(object): # pylint: disable=R0902
if req_type == DHCPREQUEST and requested_addr != binding.ip:
resp_type = DHCPNAK
logging.info("Sending DHCPNAK to %s on %s: requested %s"
logging.info(" - Sending DHCPNAK to %s on %s: requested %s"
" instead of %s", binding.mac, binding.tap,
requested_addr, binding.ip)
......@@ -651,7 +655,7 @@ class VMNetProxy(object): # pylint: disable=R0902
elif req_type == DHCPRELEASE:
# Log and ignore
logging.info("DHCPRELEASE from %s on %s", binding.mac, binding.tap)
logging.info(" - DHCPRELEASE from %s on %s", binding.mac, binding.tap)
return
# Finally, always add the server identifier and end options
......@@ -662,38 +666,36 @@ class VMNetProxy(object): # pylint: disable=R0902
]
resp /= DHCP(options=dhcp_options)
logging.info("%s to %s (%s) on %s", DHCP_TYPES[resp_type], mac,
logging.info(" - %s to %s (%s) on %s", DHCP_TYPES[resp_type], mac,
binding.ip, binding.tap)
try:
self.sendp(resp, binding.indev)
except socket.error, e:
logging.warn("DHCP response on %s failed: %s", binding.indev, str(e))
logging.warn(" - DHCP response on %s failed: %s", binding.indev, str(e))
except Exception, e:
logging.warn("Unkown error during DHCP response on %s: %s",
logging.warn(" - Unkown error during DHCP response on %s: %s",
binding.indev, str(e))
def rs_response(self, i, payload): # pylint: disable=W0613
""" Generate a reply to a BOOTP/DHCP request
"""
logging.debug(" * Processing pending RS request (NFQUEUE %d)", i)
pkt = IPv6(payload.get_data())
#logging.debug(pkt.show())
try:
mac = pkt.lladdr
except:
logging.debug("Cannot obtain lladdr in rs")
logging.debug(" - Cannot obtain lladdr in rs")
return
logging.debug("Generating an rs response for mac %s", mac)
indev = get_indev(payload)
binding = get_binding(self, indev, mac)
if binding is None:
# We don't know anything about this interface, so accept the packet
# and return
logging.debug("Ignoring router solicitation on for mac %s", mac)
logging.debug(" - Ignoring router solicitation on for mac %s", mac)
# We don't know what to do with this packet, so let the kernel
# handle it
payload.set_verdict(nfqueue.NF_ACCEPT)
......@@ -703,14 +705,14 @@ class VMNetProxy(object): # pylint: disable=R0902
payload.set_verdict(nfqueue.NF_DROP)
if mac != binding.mac:
logging.warn("Received spoofed RS request for mac %s from tap %s",
logging.warn(" - Received spoofed RS request for mac %s from tap %s",
mac, binding.tap)
return
subnet = binding.net6
if subnet.net is None:
logging.debug("No IPv6 network assigned for the interface")
logging.debug(" - No IPv6 network assigned for tap %s", binding.tap)
return
indevmac = self.get_iface_hw_addr(binding.indev)
......@@ -718,6 +720,9 @@ class VMNetProxy(object): # pylint: disable=R0902
if ifll is None:
return
logging.debug(" - Generating RA for host %s (mac %s) on tap %s",
binding.hostname, mac, binding.tap)
resp = Ether(src=indevmac)/\
IPv6(src=str(ifll))/ICMPv6ND_RA(routerlifetime=14400)/\
ICMPv6NDOptPrefixInfo(prefix=str(subnet.prefix),
......@@ -727,13 +732,12 @@ class VMNetProxy(object): # pylint: disable=R0902
resp /= ICMPv6NDOptRDNSS(dns=self.ipv6_nameservers,
lifetime=self.ra_period * 3)
logging.info("RA on %s for %s", binding.indev, subnet.net)
try:
self.sendp(resp, binding.indev)
except socket.error, e:
logging.warn("RA on %s failed: %s", binding.indev, str(e))
logging.warn(" - RA on %s failed: %s", binding.indev, str(e))
except Exception, e:
logging.warn("Unkown error during RA on %s: %s",
logging.warn(" - Unkown error during RA on %s: %s",
binding.indev, str(e))
def ns_response(self, i, payload): # pylint: disable=W0613
......@@ -741,15 +745,16 @@ class VMNetProxy(object): # pylint: disable=R0902
"""
logging.debug(" * Processing pending NS request (NFQuEUE %d)", i)
ns = IPv6(payload.get_data())
#logging.debug(ns.show())
try:
mac = ns.lladdr
except:
logging.debug("Cannot obtain lladdr from ns")
logging.debug(" - Cannot obtain lladdr from ns")
return
logging.debug("Generating ns response, dst: %s tgt: %s", ns.dst, ns.tgt)
indev = get_indev(payload)
......@@ -757,7 +762,8 @@ class VMNetProxy(object): # pylint: disable=R0902
if binding is None:
# We don't know anything about this interface, so accept the packet
# and return
logging.debug("Ignoring neighbour solicitation for eui64 %s", ns.tgt)
logging.debug(" - Ignoring neighbour solicitation for eui64 %s",
ns.tgt)
# We don't know what to do with this packet, so let the kernel
# handle it
payload.set_verdict(nfqueue.NF_ACCEPT)
......@@ -766,13 +772,13 @@ class VMNetProxy(object): # pylint: disable=R0902
payload.set_verdict(nfqueue.NF_DROP)
if mac != binding.mac:
logging.warn("Received spoofed NS request for mac %s from tap %s",
mac, binding.tap)
logging.warn(" - Received spoofed NS request"
" for mac %s from tap %s", mac, binding.tap)
return
subnet = binding.net6
if subnet.net is None:
logging.debug("No IPv6 network assigned for the interface")
logging.debug(" - No IPv6 network assigned for the interface")
return
indevmac = self.get_iface_hw_addr(binding.indev)
......@@ -782,23 +788,23 @@ class VMNetProxy(object): # pylint: disable=R0902
return
if not (subnet.net.overlaps(ns.tgt) or str(ns.tgt) == str(ifll)):
logging.debug("Received NS for a non-routable IP (%s)", ns.tgt)
payload.set_verdict(nfqueue.NF_ACCEPT)
logging.debug(" - Received NS for a non-routable IP (%s)", ns.tgt)
return 1
logging.debug("Sending NA response to client %s", binding.mac)
logging.debug(" - Generating NA for host %s (mac %s) on tap %s",
binding.hostname, mac, binding.tap)
resp = Ether(src=indevmac, dst=binding.mac)/\
IPv6(src=str(ifll), dst=ns.src)/\
ICMPv6ND_NA(R=1, O=0, S=1, tgt=ns.tgt)/\
ICMPv6NDOptDstLLAddr(lladdr=indevmac)
logging.info("NA on %s for %s", binding.indev, ns.tgt)
try:
self.sendp(resp, binding.indev)
except socket.error, e:
logging.warn("NA on %s failed: %s", binding.indev, str(e))
logging.warn(" - NA on %s failed: %s", binding.indev, str(e))
except Exception, e:
logging.warn("Unkown error during periodic NA on %s: %s",
logging.warn(" - Unkown error during periodic NA on %s: %s",
binding.indev, str(e))
def send_periodic_ra(self):
......@@ -816,7 +822,7 @@ class VMNetProxy(object): # pylint: disable=R0902
# mac = binding.mac
subnet = binding.net6
if subnet.net is None:
logging.debug("Skipping periodic RA on interface %s,"
logging.debug(" - Skipping periodic RA on interface %s,"
" as it is not IPv6-connected", tap)
continue
indevmac = self.get_iface_hw_addr(indev)
......@@ -833,12 +839,12 @@ class VMNetProxy(object): # pylint: disable=R0902
try:
self.sendp(resp, indev)
except socket.error, e:
logging.warn("Periodic RA on %s failed: %s", tap, str(e))
logging.warn(" - Periodic RA on %s failed: %s", tap, str(e))
except Exception, e:
logging.warn("Unknown error during periodic RA on %s: %s",
logging.warn(" - Unkown error during periodic RA on %s: %s",
tap, str(e))
i += 1
logging.debug("Sent %d RAs in %.2f seconds", i, time.time() - start)
logging.debug(" - Sent %d RAs in %.2f seconds", i, time.time() - start)
def serve(self):
""" Safely perform the main loop, freeing all resources upon exit
......@@ -880,9 +886,13 @@ class VMNetProxy(object): # pylint: disable=R0902
self.notifier.process_events()
rlist.remove(iwfd)
logging.debug("Pending requests on fds %s", rlist)
for fd in rlist:
try:
self.nfq[fd].process_pending()
cnt = self.nfq[fd].process_pending()
logging.debug(" * Processed %d requests on NFQUEUE"
" with fd %d", cnt, fd)
except RuntimeError, e:
logging.warn("Error processing fd %d: %s", fd, str(e))
except Exception, e:
......
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