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 core.nodes.base.CoreNetworkBase 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.id, ifindex, sessionid)
except TypeError:
suffix = "%s.%s.%s" % (self.id, 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])
logging.debug("interface command output: %s", output)
output = output.split("\n")
veth.flow_id = int(output[0].strip().split(":")[0]) + 1
logging.debug("interface flow index: %s - %s", veth.name, veth.flow_id)
# TODO: mimic packed hwaddr
# veth.hwaddr = MacAddress.from_string(output[1].strip().split()[1])
logging.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 newveth(self, iface_id: int = None, ifname: str = None) -> int:
"""
Create a new interface.
:param iface_id: id for the new interface
:param ifname: name for the new interface
:return: nothing
"""
with self.lock:
if iface_id is None:
iface_id = self.next_iface_id()
if ifname is None:
ifname = f"eth{iface_id}"
sessionid = self.session.short_session_id()
try:
suffix = f"{self.id:x}.{iface_id}.{sessionid}"
except TypeError:
suffix = f"{self.id}.{iface_id}.{sessionid}"
localname = f"veth{suffix}"
if len(localname) >= 16:
raise ValueError(
f"interface local name ({localname}) too long")
name = localname + "p"
if len(name) >= 16:
raise ValueError(f"interface name ({name}) too long")
veth = Veth(self.session,
self,
name,
localname,
start=self.up,
server=self.server)
if self.up:
self.net_client.device_ns(veth.name, str(self.pid))
self.node_net_client.device_name(veth.name, ifname)
self.node_net_client.checksums_off(ifname)
veth.name = ifname
if self.up:
flow_id = self.node_net_client.get_ifindex(veth.name)
veth.flow_id = int(flow_id)
logging.debug("interface flow index: %s - %s", veth.name,
veth.flow_id)
mac = self.node_net_client.get_mac(veth.name)
logging.debug("interface mac: %s - %s", veth.name, mac)
veth.set_mac(mac)
try:
# add network interface to the node. If unsuccessful, destroy the
# network interface and raise exception.
self.add_iface(veth, iface_id)
except ValueError as e:
veth.shutdown()
del veth
raise e
return iface_id
