def off(self, target, component):
# Kill tcpdump, if it was started
pidfile = os.path.join(target.state_dir, "tcpdump.pid")
commonl.process_terminate(pidfile,
tag="tcpdump",
path="/usr/sbin/tcpdump")
# remove the top level device
mode = self._get_mode(target)
if mode == 'physical':
# bring down the lower device
ifname = commonl.if_find_by_mac(target.tags['mac_addr'])
subprocess.check_call(
# flush the IP addresses, bring it down
"/usr/sbin/ip add flush dev %s; "
"/usr/sbin/ip link set dev %s down promisc off" %
(ifname, ifname),
shell=True)
elif mode == 'vlan':
commonl.if_remove_maybe("b%(id)s" % target.kws)
# nothing; we killed the upper and on the lwoer, a
# physical device we do nothing, as others might be using it
pass
elif mode == 'virtual':
commonl.if_remove_maybe("b%(id)s" % target.kws)
# remove the lower we created
commonl.if_remove_maybe("_b%(id)s" % target.kws)
else:
raise AssertionError("Unknown mode %s" % mode)
target.fsdb.set('power_state', 'off')
def _if_rename(target):
if 'mac_addr' in target.tags:
# We do have a physical device, so we are going to first,
# rename it to match the IC's name (so it allows targets
# to find it to run IP commands to attach to it)
ifname = commonl.if_find_by_mac(target.tags['mac_addr'])
if ifname == None:
raise ValueError("Cannot find network interface with MAC '%s'"
% target.tags['mac_addr'])
if ifname != target.id:
subprocess.check_call("ip link set %s down" % ifname,
shell = True)
subprocess.check_call("ip link set %s name b%s"
% (ifname, target.id), shell = True)
def on(self, target, _component):
# Bring up the lower network interface; lower is called
# whatever (if it is a physical device) or _bNAME; bring it
# up, make it promiscuous
mode = self._get_mode(target)
if mode == 'vlan':
# our lower is a physical device, our upper is a device
# which till tag for eth vlan %(vlan)
ifname = commonl.if_find_by_mac(target.tags['mac_addr'],
physical=True)
commonl.if_remove_maybe("b%(id)s" % target.kws)
kws = dict(target.kws)
kws['ifname'] = ifname
subprocess.check_call(
"/usr/sbin/ip link add"
" link %(ifname)s name b%(id)s"
" type vlan id %(vlan)s"
#" protocol VLAN_PROTO"
#" reorder_hdr on|off"
#" gvrp on|off mvrp on|off loose_binding on|off"
% kws,
shell=True)
subprocess.check_call( # bring lower up
"/usr/sbin/ip link set dev %s up promisc on" % ifname,
shell=True)
elif mode == 'physical':
ifname = commonl.if_find_by_mac(target.tags['mac_addr'])
subprocess.check_call( # bring lower up
"/usr/sbin/ip link set dev %s up promisc on" % ifname,
shell=True)
self._if_rename(target)
elif mode == 'virtual':
# We do not have a physical device, a bridge, to serve as
# lower
commonl.if_remove_maybe("_b%(id)s" % target.kws)
subprocess.check_call("/usr/sbin/ip link add"
" name _b%(id)s"
" type bridge" % target.kws,
shell=True)
subprocess.check_call("/usr/sbin/ip link add"
" link _b%(id)s name b%(id)s"
" type macvlan mode bridge; " % target.kws,
shell=True)
subprocess.check_call( # bring lower up
"/usr/sbin/ip link set"
" dev _b%(id)s"
" up promisc on" % target.kws,
shell=True)
else:
raise AssertionError("Unknown mode %s" % mode)
# Configure the IP addresses for the top interface
subprocess.check_call( # clean up existing address
"/usr/sbin/ip add flush dev b%(id)s " % target.kws,
shell=True)
subprocess.check_call( # add IPv6
# if this fails, check Network Manager hasn't disabled ipv6
# sysctl -a | grep disable_ipv6 must show all to 0
"/usr/sbin/ip addr add"
" %(ipv6_addr)s/%(ipv6_prefix_len)s dev b%(id)s " % target.kws,
shell=True)
subprocess.check_call( # add IPv4
"/usr/sbin/ip addr add"
" %(ipv4_addr)s/%(ipv4_prefix_len)d"
" dev b%(id)s" % target.kws,
shell=True)
# Bring up the top interface, which sets up ther outing
subprocess.check_call(
"/usr/sbin/ip link set dev b%(id)s up promisc on" % target.kws,
shell=True)
target.fsdb.set('power_state', 'on')
# Start tcpdump on the network?
#
# The value of the tcpdump property, if not None, is the
# filename we'll capture to.
tcpdump = target.fsdb.get('tcpdump')
if tcpdump:
assert not os.path.sep in tcpdump \
and tcpdump != "" \
and tcpdump != os.path.pardir \
and tcpdump != os.path.curdir, \
"Bad filename for TCP dump capture '%s' specified as " \
" value to property *tcpdump*: must not include" % tcpdump
# per ttbd:make_ticket(), colon splits the real username
# from the ticket
owner = target.owner_get().split(":")[0]
assert owner, "BUG? target not owned on power on?"
capfile = os.path.join(target.files_path, owner, tcpdump)
# Because it is in the user's area,
# we assume the user knows what he is doing to overwrite it,
# so we'll remove any first
commonl.rm_f(capfile)
pidfile = os.path.join(target.state_dir, "tcpdump.pid")
logfile = os.path.join(target.state_dir, "tcpdump.log")
cmdline = [
"/usr/sbin/tcpdump", "-U", "-i",
"_b%(id)s" % target.kws, "-w", capfile
]
try:
logf = open(logfile, "a")
target.log.info("Starting tcpdump with: %s", " ".join(cmdline))
p = subprocess.Popen(cmdline,
shell=False,
cwd=target.state_dir,
close_fds=True,
stdout=logf,
stderr=subprocess.STDOUT)
except OSError as e:
raise RuntimeError("tcpdump failed to start: %s" % e)
ttbl.daemon_pid_add(p.pid) # FIXME: race condition if it died?
with open(pidfile, "w") as pidfilef:
pidfilef.write("%d" % p.pid)
pid = commonl.process_started( # Verify it started
pidfile,
"/usr/sbin/tcpdump",
verification_f=os.path.exists,
verification_f_args=(capfile, ),
timeout=20,
tag="tcpdump",
log=target.log)
if pid == None:
raise RuntimeError("tcpdump failed to start after 5s")
