def shutdown(self):
"""
Control network shutdown.
:return: nothing
"""
if self.serverintf is not None:
try:
utils.check_cmd([
constants.BRCTL_BIN, "delif", self.brname, self.serverintf
])
except CoreCommandError:
logging.exception(
"error deleting server interface %s from bridge %s",
self.serverintf, self.brname)
if self.updown_script is not None:
try:
logging.info("interface %s updown script (%s shutdown) called",
self.brname, self.updown_script)
utils.check_cmd([self.updown_script, self.brname, "shutdown"])
except CoreCommandError:
logging.exception("error issuing shutdown script shutdown")
LxBrNet.shutdown(self)
def test_link_update(self, session, ip_prefixes):
# given
node_one = session.add_node()
node_two = session.add_node(_type=NodeTypes.SWITCH)
interface_one = ip_prefixes.create_interface(node_one)
session.add_link(node_one.objid, node_two.objid, interface_one)
interface = node_one.netif(interface_one.id)
output = utils.check_cmd(
["tc", "qdisc", "show", "dev", interface.localname])
assert "delay" not in output
assert "rate" not in output
assert "loss" not in output
assert "duplicate" not in output
# when
link_options = LinkOptions()
link_options.delay = 50
link_options.bandwidth = 5000000
link_options.per = 25
link_options.dup = 25
session.update_link(node_one.objid,
node_two.objid,
interface_one_id=interface_one.id,
link_options=link_options)
# then
output = utils.check_cmd(
["tc", "qdisc", "show", "dev", interface.localname])
assert "delay" in output
assert "rate" in output
assert "loss" in output
assert "duplicate" in output
def shutdown(self):
if not self.up:
logger.info("exiting shutdown, object is not up")
return
ebtables_queue.stopupdateloop(self)
try:
utils.check_cmd(
[constants.IP_BIN, "link", "set", self.bridge_name, "down"])
utils.check_cmd([constants.OVS_BIN, "del-br", self.bridge_name])
ebtables_commands(utils.check_cmd, [[
constants.EBTABLES_BIN, "-D", "FORWARD", "--logical-in",
self.bridge_name, "-j", self.bridge_name
], [constants.EBTABLES_BIN, "-X", self.bridge_name]])
except CoreCommandError:
logger.exception("error bringing bridge down and removing it")
# removes veth pairs used for bridge-to-bridge connections
for interface in self.netifs():
interface.shutdown()
self._netif.clear()
self._linked.clear()
del self.session
self.up = False
def shutdown(self):
"""
Interface shutdown logic.
:return: nothing
"""
if not self.up:
return
if self.node:
try:
self.node.check_cmd([
constants.IP_BIN, "-6", "addr", "flush", "dev", self.name
])
except CoreCommandError:
logger.exception("error shutting down interface")
if self.localname:
try:
utils.check_cmd(
[constants.IP_BIN, "link", "delete", self.localname])
except CoreCommandError:
logger.exception("error deleting link")
self.up = False
def test_link_update(self, session, ip_prefixes):
# given
node_one = session.add_node()
node_two = session.add_node(_type=NodeTypes.SWITCH)
interface_one = ip_prefixes.create_interface(node_one)
session.add_link(node_one.objid, node_two.objid, interface_one)
interface = node_one.netif(interface_one.id)
output = utils.check_cmd(["tc", "qdisc", "show", "dev", interface.localname])
assert "delay" not in output
assert "rate" not in output
assert "loss" not in output
assert "duplicate" not in output
# when
link_options = LinkOptions()
link_options.delay = 50
link_options.bandwidth = 5000000
link_options.per = 25
link_options.dup = 25
session.update_link(node_one.objid, node_two.objid,
interface_one_id=interface_one.id, link_options=link_options)
# then
output = utils.check_cmd(["tc", "qdisc", "show", "dev", interface.localname])
assert "delay" in output
assert "rate" in output
assert "loss" in output
assert "duplicate" in output
def startup(self):
"""
:return:
:raises CoreCommandError: when there is a command exception
"""
utils.check_cmd([constants.OVS_BIN, "add-br", self.bridge_name])
# turn off spanning tree protocol and forwarding delay
# TODO: appears stp and rstp are off by default, make sure this always holds true
# TODO: apears ovs only supports rstp forward delay and again it's off by default
utils.check_cmd(
[constants.IP_BIN, "link", "set", self.bridge_name, "up"])
# create a new ebtables chain for this bridge
ebtables_commands(
utils.check_cmd,
[[
constants.EBTABLES_BIN, "-N", self.bridge_name, "-P",
self.policy
],
[
constants.EBTABLES_BIN, "-A", "FORWARD", "--logical-in",
self.bridge_name, "-j", self.bridge_name
]])
self.up = True
def shutdown(self):
"""
Linux bridge shutdown logic.
:return: nothing
"""
if not self.up:
return
ebq.stopupdateloop(self)
try:
utils.check_cmd(
[constants.IP_BIN, "link", "set", self.brname, "down"])
utils.check_cmd([constants.BRCTL_BIN, "delbr", self.brname])
ebtablescmds(utils.check_cmd, [[
constants.EBTABLES_BIN, "-D", "FORWARD", "--logical-in",
self.brname, "-j", self.brname
], [constants.EBTABLES_BIN, "-X", self.brname]])
except CoreCommandError:
logging.exception("error during shutdown")
# removes veth pairs used for bridge-to-bridge connections
for netif in self.netifs():
netif.shutdown()
self._netif.clear()
self._linked.clear()
del self.session
self.up = False
def shutdown(self):
if not self.up:
logger.info("exiting shutdown, object is not up")
return
ebtables_queue.stopupdateloop(self)
try:
utils.check_cmd([constants.IP_BIN, "link", "set", self.bridge_name, "down"])
utils.check_cmd([constants.OVS_BIN, "del-br", self.bridge_name])
ebtables_commands(utils.check_cmd, [
[constants.EBTABLES_BIN, "-D", "FORWARD", "--logical-in", self.bridge_name, "-j", self.bridge_name],
[constants.EBTABLES_BIN, "-X", self.bridge_name]
])
except CoreCommandError:
logger.exception("error bringing bridge down and removing it")
# removes veth pairs used for bridge-to-bridge connections
for interface in self.netifs():
interface.shutdown()
self._netif.clear()
self._linked.clear()
del self.session
self.up = False
def shutdown(self):
"""
Linux bridge shutdown logic.
:return: nothing
"""
if not self.up:
return
ebq.stopupdateloop(self)
try:
utils.check_cmd([constants.IP_BIN, "link", "set", self.brname, "down"])
utils.check_cmd([constants.BRCTL_BIN, "delbr", self.brname])
ebtablescmds(utils.check_cmd, [
[constants.EBTABLES_BIN, "-D", "FORWARD", "--logical-in", self.brname, "-j", self.brname],
[constants.EBTABLES_BIN, "-X", self.brname]
])
except CoreCommandError:
logger.exception("error during shutdown")
# removes veth pairs used for bridge-to-bridge connections
for netif in self.netifs():
netif.shutdown()
self._netif.clear()
self._linked.clear()
del self.session
self.up = False
def detach(self, interface):
if self.up:
utils.check_cmd([
constants.OVS_BIN, "del-port", self.bridge_name,
interface.localname
])
PyCoreNet.detach(self, interface)
def newveth(self, ifindex=None, ifname=None, net=None):
"""
Create a new interface.
:param int ifindex: index for the new interface
:param str ifname: name for the new interface
:param net: network to associate interface with
:return: nothing
"""
with self.lock:
if ifindex is None:
ifindex = self.newifindex()
if ifname is None:
ifname = "eth%d" % ifindex
sessionid = self.session.short_session_id()
try:
suffix = "%x.%s.%s" % (self.objid, ifindex, sessionid)
except TypeError:
suffix = "%s.%s.%s" % (self.objid, ifindex, sessionid)
localname = "veth" + suffix
if len(localname) >= 16:
raise ValueError("interface local name (%s) too long" % localname)
name = localname + "p"
if len(name) >= 16:
raise ValueError("interface name (%s) too long" % name)
veth = VEth(node=self, name=name, localname=localname, net=net, start=self.up)
if self.up:
utils.check_cmd([constants.IP_BIN, "link", "set", veth.name, "netns", str(self.pid)])
self.check_cmd([constants.IP_BIN, "link", "set", veth.name, "name", ifname])
veth.name = ifname
if self.up:
# TODO: potentially find better way to query interface ID
# retrieve interface information
output = self.check_cmd(["ip", "link", "show", veth.name])
logger.debug("interface command output: %s", output)
output = output.split("\n")
veth.flow_id = int(output[0].strip().split(":")[0]) + 1
logger.debug("interface flow index: %s - %s", veth.name, veth.flow_id)
veth.hwaddr = MacAddress.from_string(output[1].strip().split()[1])
logger.debug("interface mac: %s - %s", veth.name, veth.hwaddr)
try:
self.addnetif(veth, ifindex)
except ValueError as e:
veth.shutdown()
del veth
raise e
return ifindex
def __init__(self,
node=None,
name=None,
session=None,
mtu=1458,
remoteip=None,
objid=None,
localip=None,
ttl=255,
key=None,
start=True):
"""
Creates a GreTap instance.
:param core.netns.vnode.SimpleLxcNode node: related core node
:param str name: interface name
:param core.session.Session session: core session instance
:param mtu: interface mtu
:param str remoteip: remote address
:param int objid: object id
:param str localip: local address
:param ttl: ttl value
:param key: gre tap key
:param bool start: start flag
:raises CoreCommandError: when there is a command exception
"""
PyCoreNetIf.__init__(self, node=node, name=name, mtu=mtu)
self.session = session
if objid is None:
# from PyCoreObj
objid = ((id(self) >> 16) ^ (id(self) & 0xffff)) & 0xffff
self.objid = objid
sessionid = self.session.short_session_id()
# interface name on the local host machine
self.localname = "gt.%s.%s" % (self.objid, sessionid)
self.transport_type = "raw"
if not start:
self.up = False
return
if remoteip is None:
raise ValueError, "missing remote IP required for GRE TAP device"
args = [
constants.IP_BIN, "link", "add", self.localname, "type", "gretap",
"remote",
str(remoteip)
]
if localip:
args += ["local", str(localip)]
if ttl:
args += ["ttl", str(ttl)]
if key:
args += ["key", str(key)]
utils.check_cmd(args)
args = [constants.IP_BIN, "link", "set", self.localname, "up"]
utils.check_cmd(args)
self.up = True
def addrconfig(self, addresses):
"""
Set addresses on the bridge.
"""
if not self.up:
return
for address in addresses:
utils.check_cmd([constants.IP_BIN, "addr", "add", str(address), "dev", self.bridge_name])
def attach(self, interface):
if self.up:
utils.check_cmd([
constants.OVS_BIN, "add-port", self.bridge_name,
interface.localname
])
utils.check_cmd(
[constants.IP_BIN, "link", "set", interface.localname, "up"])
PyCoreNet.attach(self, interface)
def startup(self):
"""
Set the interface in the up state.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
# interface will also be marked up during net.attach()
self.savestate()
utils.check_cmd([constants.IP_BIN, "link", "set", self.localname, "up"])
self.up = True
def __init__(self, session, objid=None, name=None, start=True):
"""
the Hub node forwards packets to all bridge ports by turning off
the MAC address learning
"""
OvsNet.__init__(self, session, objid, name, start)
if start:
# TODO: verify that the below flow accomplishes what is desired for a "HUB"
# TODO: replace "brctl setageing 0"
utils.check_cmd([constants.OVS_FLOW_BIN, "add-flow", self.bridge_name, "action=flood"])
def startup(self):
"""
Interface startup logic.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
utils.check_cmd([constants.IP_BIN, "link", "add", "name", self.localname,
"type", "veth", "peer", "name", self.name])
utils.check_cmd([constants.IP_BIN, "link", "set", self.localname, "up"])
self.up = True
def linknet(self, network):
"""
Link this bridge with another by creating a veth pair and installing
each device into each bridge.
"""
session_id = self.session.short_session_id()
try:
self_objid = "%x" % self.objid
except TypeError:
self_objid = "%s" % self.objid
try:
net_objid = "%x" % network.objid
except TypeError:
net_objid = "%s" % network.objid
localname = "veth%s.%s.%s" % (self_objid, net_objid, session_id)
if len(localname) >= 16:
raise ValueError("interface local name %s too long" % localname)
name = "veth%s.%s.%s" % (net_objid, self_objid, session_id)
if len(name) >= 16:
raise ValueError("interface name %s too long" % name)
interface = VEth(node=None,
name=name,
localname=localname,
mtu=1500,
net=self,
start=self.up)
self.attach(interface)
if network.up:
# this is similar to net.attach() but uses netif.name instead
# of localname
utils.check_cmd([
constants.OVS_BIN, "add-port", network.bridge_name,
interface.name
])
utils.check_cmd(
[constants.IP_BIN, "link", "set", interface.name, "up"])
# TODO: is there a native method for this? see if this causes issues
# i = network.newifindex()
# network._netif[i] = interface
# with network._linked_lock:
# network._linked[interface] = {}
# this method call is equal to the above, with a interface.netifi = call
network.attach(interface)
interface.net = self
interface.othernet = network
return interface
def detach(self, netif):
"""
Detach a network interface.
:param core.netns.vif.Veth netif: network interface to detach
:return: nothing
"""
if self.up:
utils.check_cmd([constants.BRCTL_BIN, "delif", self.brname, netif.localname])
PyCoreNet.detach(self, netif)
def addrconfig(self, addrlist):
"""
Set addresses on the bridge.
:param list[str] addrlist: address list
:return: nothing
"""
if not self.up:
return
for addr in addrlist:
utils.check_cmd([constants.IP_BIN, "addr", "add", str(addr), "dev", self.brname])
def attach(self, netif):
"""
Attach a network interface.
:param core.netns.vnode.VEth netif: network interface to attach
:return: nothing
"""
if self.up:
utils.check_cmd([constants.BRCTL_BIN, "addif", self.brname, netif.localname])
utils.check_cmd([constants.IP_BIN, "link", "set", netif.localname, "up"])
PyCoreNet.attach(self, netif)
def deladdr(self, addr):
"""
Delete address from network interface.
:param str addr: address to delete
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
if self.up:
utils.check_cmd([constants.IP_BIN, "addr", "del", str(addr), "dev", self.name])
PyCoreNetIf.deladdr(self, addr)
def startup(self):
"""
Linux bridge starup logic.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
utils.check_cmd([constants.BRCTL_BIN, "addbr", self.brname])
# turn off spanning tree protocol and forwarding delay
utils.check_cmd([constants.BRCTL_BIN, "stp", self.brname, "off"])
utils.check_cmd([constants.BRCTL_BIN, "setfd", self.brname, "0"])
utils.check_cmd([constants.IP_BIN, "link", "set", self.brname, "up"])
# create a new ebtables chain for this bridge
ebtablescmds(utils.check_cmd, [
[constants.EBTABLES_BIN, "-N", self.brname, "-P", self.policy],
[constants.EBTABLES_BIN, "-A", "FORWARD", "--logical-in", self.brname, "-j", self.brname]
])
# turn off multicast snooping so mcast forwarding occurs w/o IGMP joins
snoop = "/sys/devices/virtual/net/%s/bridge/multicast_snooping" % self.brname
if os.path.exists(snoop):
with open(snoop, "w") as snoop_file:
snoop_file.write("0")
self.up = True
def startup(self):
"""
Linux bridge starup logic.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
utils.check_cmd([constants.BRCTL_BIN, "addbr", self.brname])
# turn off spanning tree protocol and forwarding delay
utils.check_cmd([constants.BRCTL_BIN, "stp", self.brname, "off"])
utils.check_cmd([constants.BRCTL_BIN, "setfd", self.brname, "0"])
utils.check_cmd([constants.IP_BIN, "link", "set", self.brname, "up"])
# create a new ebtables chain for this bridge
ebtablescmds(
utils.check_cmd,
[[constants.EBTABLES_BIN, "-N", self.brname, "-P", self.policy],
[
constants.EBTABLES_BIN, "-A", "FORWARD", "--logical-in",
self.brname, "-j", self.brname
]])
# turn off multicast snooping so mcast forwarding occurs w/o IGMP joins
snoop = "/sys/devices/virtual/net/%s/bridge/multicast_snooping" % self.brname
if os.path.exists(snoop):
with open(snoop, "w") as snoop_file:
snoop_file.write("0")
self.up = True
def linknet(self, net):
"""
Link this bridge with another by creating a veth pair and installing
each device into each bridge.
:param core.netns.vnet.LxBrNet net: network to link with
:return: created interface
:rtype: Veth
"""
sessionid = self.session.short_session_id()
try:
self_objid = "%x" % self.objid
except TypeError:
self_objid = "%s" % self.objid
try:
net_objid = "%x" % net.objid
except TypeError:
net_objid = "%s" % net.objid
localname = "veth%s.%s.%s" % (self_objid, net_objid, sessionid)
if len(localname) >= 16:
raise ValueError("interface local name %s too long" % localname)
name = "veth%s.%s.%s" % (net_objid, self_objid, sessionid)
if len(name) >= 16:
raise ValueError("interface name %s too long" % name)
netif = VEth(node=None,
name=name,
localname=localname,
mtu=1500,
net=self,
start=self.up)
self.attach(netif)
if net.up:
# this is similar to net.attach() but uses netif.name instead
# of localname
utils.check_cmd(
[constants.BRCTL_BIN, "addif", net.brname, netif.name])
utils.check_cmd(
[constants.IP_BIN, "link", "set", netif.name, "up"])
i = net.newifindex()
net._netif[i] = netif
with net._linked_lock:
net._linked[netif] = {}
netif.net = self
netif.othernet = net
return netif
def __init__(self, session, objid=None, name=None, start=True):
"""
Creates a HubNode instance.
:param core.session.Session session: core session instance
:param int objid: node id
:param str name: node namee
:param bool start: start flag
:raises CoreCommandError: when there is a command exception
"""
LxBrNet.__init__(self, session, objid, name, start)
# TODO: move to startup method
if start:
utils.check_cmd([constants.BRCTL_BIN, "setageing", self.brname, "0"])
def install(self):
"""
Install this TAP into its namespace. This is not done from the
startup() method but called at a later time when a userspace
program (running on the host) has had a chance to open the socket
end of the TAP.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
self.waitfordevicelocal()
netns = str(self.node.pid)
utils.check_cmd([constants.IP_BIN, "link", "set", self.localname, "netns", netns])
self.node.check_cmd([constants.IP_BIN, "link", "set", self.localname, "name", self.name])
self.node.check_cmd([constants.IP_BIN, "link", "set", self.name, "up"])
def shutdown(self):
if self.serverintf:
try:
utils.check_cmd([constants.OVS_BIN, "del-port", self.bridge_name, self.serverintf])
except CoreCommandError:
logger.exception("error deleting server interface %s to controlnet bridge %s",
self.serverintf, self.bridge_name)
if self.updown_script:
try:
logger.info("interface %s updown script (%s shutdown) called", self.bridge_name, self.updown_script)
utils.check_cmd([self.updown_script, self.bridge_name, "shutdown"])
except CoreCommandError:
logger.exception("error during updown script shutdown")
OvsNet.shutdown(self)
def shutdown(self):
"""
Shutdown logic for a GreTap.
:return: nothing
"""
if self.localname:
try:
args = ["ip", "link", "set", self.localname, "down"]
utils.check_cmd(args)
args = ["ip", "link", "del", self.localname]
utils.check_cmd(args)
except CoreCommandError:
logger.exception("error during shutdown")
self.localname = None
def savestate(self):
"""
Save the addresses and other interface state before using the
interface for emulation purposes. TODO: save/restore the PROMISC flag
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
self.old_up = False
self.old_addrs = []
args = [constants.IP_BIN, "addr", "show", "dev", self.localname]
output = utils.check_cmd(args)
for line in output.split("\n"):
items = line.split()
if len(items) < 2:
continue
if items[1] == "%s:" % self.localname:
flags = items[2][1:-1].split(",")
if "UP" in flags:
self.old_up = True
elif items[0] == "inet":
self.old_addrs.append((items[1], items[3]))
elif items[0] == "inet6":
if items[1][:4] == "fe80":
continue
self.old_addrs.append((items[1], None))
def savestate(self):
"""
Save the addresses and other interface state before using the
interface for emulation purposes. TODO: save/restore the PROMISC flag
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
self.old_up = False
self.old_addrs = []
args = [constants.IP_BIN, "addr", "show", "dev", self.localname]
output = utils.check_cmd(args)
for line in output.split("\n"):
items = line.split()
if len(items) < 2:
continue
if items[1] == "%s:" % self.localname:
flags = items[2][1:-1].split(",")
if "UP" in flags:
self.old_up = True
elif items[0] == "inet":
self.old_addrs.append((items[1], items[3]))
elif items[0] == "inet6":
if items[1][:4] == "fe80":
continue
self.old_addrs.append((items[1], None))
def linknet(self, network):
"""
Link this bridge with another by creating a veth pair and installing
each device into each bridge.
"""
session_id = self.session.short_session_id()
try:
self_objid = "%x" % self.objid
except TypeError:
self_objid = "%s" % self.objid
try:
net_objid = "%x" % network.objid
except TypeError:
net_objid = "%s" % network.objid
localname = "veth%s.%s.%s" % (self_objid, net_objid, session_id)
if len(localname) >= 16:
raise ValueError("interface local name %s too long" % localname)
name = "veth%s.%s.%s" % (net_objid, self_objid, session_id)
if len(name) >= 16:
raise ValueError("interface name %s too long" % name)
interface = VEth(node=None, name=name, localname=localname, mtu=1500, net=self, start=self.up)
self.attach(interface)
if network.up:
# this is similar to net.attach() but uses netif.name instead
# of localname
utils.check_cmd([constants.OVS_BIN, "add-port", network.bridge_name, interface.name])
utils.check_cmd([constants.IP_BIN, "link", "set", interface.name, "up"])
# TODO: is there a native method for this? see if this causes issues
# i = network.newifindex()
# network._netif[i] = interface
# with network._linked_lock:
# network._linked[interface] = {}
# this method call is equal to the above, with a interface.netifi = call
network.attach(interface)
interface.net = self
interface.othernet = network
return interface
def post_startup(self):
"""
Logic to execute after the emane manager is finished with startup.
:return: nothing
"""
# get configured schedule
config = self.session.emane.get_configs(node_id=self.object_id, config_type=self.name)
if not config:
return
schedule = config[self.schedule_name]
# get the set event device
event_device = self.session.emane.event_device
# initiate tdma schedule
logger.info("setting up tdma schedule: schedule(%s) device(%s)", schedule, event_device)
utils.check_cmd(["emaneevent-tdmaschedule", "-i", event_device, schedule])
def test_net(self, session, net_type):
# given
# when
node = session.add_node(_type=net_type)
# then
assert node
assert node.up
assert utils.check_cmd(["brctl", "show", node.brname])
def statescript(self, typestr):
"""
State of the mobility script.
:param str typestr: state type string
:return: nothing
"""
filename = None
if typestr == "run" or typestr == "unpause":
filename = self.script_start
elif typestr == "pause":
filename = self.script_pause
elif typestr == "stop":
filename = self.script_stop
if filename is None or filename == '':
return
filename = self.findfile(filename)
args = ["/bin/sh", filename, typestr]
utils.check_cmd(args, cwd=self.session.session_dir, env=self.session.get_environment())
def test_net(self, session, net_type):
# given
# when
node = session.add_node(_type=net_type)
# then
assert node
assert node.up
assert utils.check_cmd(["brctl", "show", node.brname])
def statescript(self, typestr):
"""
State of the mobility script.
:param str typestr: state type string
:return: nothing
"""
filename = None
if typestr == "run" or typestr == "unpause":
filename = self.script_start
elif typestr == "pause":
filename = self.script_pause
elif typestr == "stop":
filename = self.script_stop
if filename is None or filename == '':
return
filename = self.findfile(filename)
args = ["/bin/sh", filename, typestr]
utils.check_cmd(args, cwd=self.session.session_dir, env=self.session.get_environment())
def linknet(self, net):
"""
Link this bridge with another by creating a veth pair and installing
each device into each bridge.
:param core.netns.vnet.LxBrNet net: network to link with
:return: created interface
:rtype: Veth
"""
sessionid = self.session.short_session_id()
try:
self_objid = "%x" % self.objid
except TypeError:
self_objid = "%s" % self.objid
try:
net_objid = "%x" % net.objid
except TypeError:
net_objid = "%s" % net.objid
localname = "veth%s.%s.%s" % (self_objid, net_objid, sessionid)
if len(localname) >= 16:
raise ValueError("interface local name %s too long" % localname)
name = "veth%s.%s.%s" % (net_objid, self_objid, sessionid)
if len(name) >= 16:
raise ValueError("interface name %s too long" % name)
netif = VEth(node=None, name=name, localname=localname, mtu=1500, net=self, start=self.up)
self.attach(netif)
if net.up:
# this is similar to net.attach() but uses netif.name instead
# of localname
utils.check_cmd([constants.BRCTL_BIN, "addif", net.brname, netif.name])
utils.check_cmd([constants.IP_BIN, "link", "set", netif.name, "up"])
i = net.newifindex()
net._netif[i] = netif
with net._linked_lock:
net._linked[netif] = {}
netif.net = self
netif.othernet = net
return netif
def startup(self):
"""
:return:
:raises CoreCommandError: when there is a command exception
"""
utils.check_cmd([constants.OVS_BIN, "add-br", self.bridge_name])
# turn off spanning tree protocol and forwarding delay
# TODO: appears stp and rstp are off by default, make sure this always holds true
# TODO: apears ovs only supports rstp forward delay and again it's off by default
utils.check_cmd([constants.IP_BIN, "link", "set", self.bridge_name, "up"])
# create a new ebtables chain for this bridge
ebtables_commands(utils.check_cmd, [
[constants.EBTABLES_BIN, "-N", self.bridge_name, "-P", self.policy],
[constants.EBTABLES_BIN, "-A", "FORWARD", "--logical-in", self.bridge_name, "-j", self.bridge_name]
])
self.up = True
def shutdown(self):
"""
Control network shutdown.
:return: nothing
"""
if self.serverintf is not None:
try:
utils.check_cmd([constants.BRCTL_BIN, "delif", self.brname, self.serverintf])
except CoreCommandError:
logger.exception("error deleting server interface %s from bridge %s", self.serverintf, self.brname)
if self.updown_script is not None:
try:
logger.info("interface %s updown script (%s shutdown) called", self.brname, self.updown_script)
utils.check_cmd([self.updown_script, self.brname, "shutdown"])
except CoreCommandError:
logger.exception("error issuing shutdown script shutdown")
LxBrNet.shutdown(self)
def post_startup(self, emane_manager):
"""
Logic to execute after the emane manager is finished with startup.
:param core.emane.emanemanager.EmaneManager emane_manager: emane manager for the session
:return: nothing
"""
# get configured schedule
values = emane_manager.getconfig(self.object_id, self.name,
self.getdefaultvalues())[1]
if values is None:
return
schedule = self.valueof(self.schedule_name, values)
event_device = emane_manager.event_device
# initiate tdma schedule
logger.info("setting up tdma schedule: schedule(%s) device(%s)",
schedule, event_device)
utils.check_cmd(
["emaneevent-tdmaschedule", "-i", event_device, schedule])
def startup(self):
"""
Startup functionality for the control network.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
if self.detectoldbridge():
return
LxBrNet.startup(self)
if self.hostid:
addr = self.prefix.addr(self.hostid)
else:
addr = self.prefix.max_addr()
logger.info("added control network bridge: %s %s", self.brname, self.prefix)
if self.assign_address:
addrlist = ["%s/%s" % (addr, self.prefix.prefixlen)]
self.addrconfig(addrlist=addrlist)
logger.info("address %s", addr)
if self.updown_script:
logger.info("interface %s updown script (%s startup) called", self.brname, self.updown_script)
utils.check_cmd([self.updown_script, self.brname, "startup"])
if self.serverintf:
# sets the interface as a port of the bridge
utils.check_cmd([constants.BRCTL_BIN, "addif", self.brname, self.serverintf])
# bring interface up
utils.check_cmd([constants.IP_BIN, "link", "set", self.serverintf, "up"])
def stopdaemons(self):
"""
Kill the appropriate EMANE daemons.
"""
# TODO: we may want to improve this if we had the PIDs from the specific EMANE daemons that we"ve started
args = ["killall", "-q", "emane"]
stop_emane_on_host = False
for node in self.getnodes():
if hasattr(node, "transport_type") and node.transport_type == "raw":
stop_emane_on_host = True
continue
if node.up:
node.cmd(args, wait=False)
# TODO: RJ45 node
if stop_emane_on_host:
try:
utils.check_cmd(args)
utils.check_cmd(["killall", "-q", "emanetransportd"])
except CoreCommandError:
logger.exception("error shutting down emane daemons")
def get_ipv4_addresses(hostname):
if hostname == 'localhost':
addr_list = []
args = [constants.IP_BIN, '-o', '-f', 'inet', 'addr', 'show']
output = utils.check_cmd(args)
for line in output.split(os.linesep):
split = line.split()
if not split:
continue
addr = split[3]
if not addr.startswith('127.'):
addr_list.append(addr)
return addr_list
else:
# TODO: handle other hosts
raise NotImplementedError
def detectoldbridge(self):
"""
Occasionally, control net bridges from previously closed sessions are not cleaned up.
Check if there are old control net bridges and delete them
"""
output = utils.check_cmd([constants.OVS_BIN, "list-br"])
output = output.strip()
if output:
for line in output.split("\n"):
bride_name = line.split(".")
if bride_name[0] == "b" and bride_name[1] == self.objid:
logger.error("older session may still be running with conflicting id for bridge: %s", line)
return True
return False
def get_ipv4_addresses(hostname):
if hostname == "localhost":
addresses = []
args = [constants.IP_BIN, "-o", "-f", "inet", "addr", "show"]
output = utils.check_cmd(args)
for line in output.split(os.linesep):
split = line.split()
if not split:
continue
interface_name = split[1]
address = split[3]
if not address.startswith("127."):
addresses.append((interface_name, address))
return addresses
else:
# TODO: handle other hosts
raise NotImplementedError
def restorestate(self):
"""
Restore the addresses and other interface state after using it.
:return: nothing
:raises CoreCommandError: when there is a command exception
"""
for addr in self.old_addrs:
if addr[1] is None:
utils.check_cmd([constants.IP_BIN, "addr", "add", addr[0], "dev", self.localname])
else:
utils.check_cmd([constants.IP_BIN, "addr", "add", addr[0], "brd", addr[1], "dev", self.localname])
if self.old_up:
utils.check_cmd([constants.IP_BIN, "link", "set", self.localname, "up"])
def startup(self):
"""
Start a new namespace node by invoking the vnoded process that
allocates a new namespace. Bring up the loopback device and set
the hostname.
:return: nothing
"""
if self.up:
raise ValueError("starting a node that is already up")
# create a new namespace for this node using vnoded
vnoded = [
constants.VNODED_BIN,
"-v",
"-c", self.ctrlchnlname,
"-l", self.ctrlchnlname + ".log",
"-p", self.ctrlchnlname + ".pid"
]
if self.nodedir:
vnoded += ["-C", self.nodedir]
env = self.session.get_environment(state=False)
env["NODE_NUMBER"] = str(self.objid)
env["NODE_NAME"] = str(self.name)
output = utils.check_cmd(vnoded, env=env)
self.pid = int(output)
# create vnode client
self.client = vnodeclient.VnodeClient(self.name, self.ctrlchnlname)
# bring up the loopback interface
logger.debug("bringing up loopback interface")
self.check_cmd([constants.IP_BIN, "link", "set", "lo", "up"])
# set hostname for node
logger.debug("setting hostname: %s", self.name)
self.check_cmd(["hostname", self.name])
# mark node as up
self.up = True
def emane_check(self):
"""
Check if emane is installed and load models.
:return: nothing
"""
try:
# check for emane
emane_version = utils.check_cmd(["emane", "--version"])
logger.info("using EMANE: %s", emane_version)
# load default emane models
self.load_models(EMANE_MODELS)
# load custom models
custom_models_path = self.session.options.get_config("emane_models_dir")
if custom_models_path:
emane_models = utils.load_classes(custom_models_path, EmaneModel)
self.load_models(emane_models)
except CoreCommandError:
logger.info("emane is not installed")