import os
import time
-from logging import error
from scapy.utils import wrpcap, rdpcap
from vpp_interface import VppInterface
+from scapy.layers.l2 import Ether, ARP
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_NA, \
+ ICMPv6NDOptSrcLLAddr, ICMPv6NDOptDstLLAddr
+from util import ppp
+
class VppPGInterface(VppInterface):
"""
self._out_history_counter += 1
return v
- def post_init_setup(self):
- """ Perform post-init setup for super class and add our own setup """
- super(VppPGInterface, self).post_init_setup()
- self._out_file = "pg%u_out.pcap" % self.sw_if_index
+ def __init__(self, test, pg_index):
+ """ Create VPP packet-generator interface """
+ r = test.vapi.pg_create_interface(pg_index)
+ self._sw_if_index = r.sw_if_index
+
+ super(VppPGInterface, self).__init__(test)
+
+ self._in_history_counter = 0
+ self._out_history_counter = 0
+ self._pg_index = pg_index
+ self._out_file = "pg%u_out.pcap" % self.pg_index
self._out_path = self.test.tempdir + "/" + self._out_file
- self._in_file = "pg%u_in.pcap" % self.sw_if_index
+ self._in_file = "pg%u_in.pcap" % self.pg_index
self._in_path = self.test.tempdir + "/" + self._in_file
self._capture_cli = "packet-generator capture pg%u pcap %s" % (
self.pg_index, self.out_path)
self._input_cli = "packet-generator new pcap %s source pg%u name %s" % (
self.in_path, self.pg_index, self.cap_name)
- def __init__(self, test, pg_index):
- """ Create VPP packet-generator interface """
- self._in_history_counter = 0
- self._out_history_counter = 0
- self._pg_index = pg_index
- self._test = test
- r = self.test.vapi.pg_create_interface(self.pg_index)
- self._sw_if_index = r.sw_if_index
- self.post_init_setup()
-
def enable_capture(self):
""" Enable capture on this packet-generator interface"""
try:
try:
output = rdpcap(self.out_path)
except IOError: # TODO
- error("File %s does not exist, probably because no"
- " packets arrived" % self.out_path)
+ self.test.logger.error("File %s does not exist, probably because no"
+ " packets arrived" % self.out_path)
return []
return output
+
+ def create_arp_req(self):
+ """Create ARP request applicable for this interface"""
+ return (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.remote_mac) /
+ ARP(op=ARP.who_has, pdst=self.local_ip4,
+ psrc=self.remote_ip4, hwsrc=self.remote_mac))
+
+ def create_ndp_req(self):
+ """Create NDP - NS applicable for this interface"""
+ return (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.remote_mac) /
+ IPv6(src=self.remote_ip6, dst=self.local_ip6) /
+ ICMPv6ND_NS(tgt=self.local_ip6) /
+ ICMPv6NDOptSrcLLAddr(lladdr=self.remote_mac))
+
+ def resolve_arp(self, pg_interface=None):
+ """Resolve ARP using provided packet-generator interface
+
+ :param pg_interface: interface used to resolve, if None then this
+ interface is used
+
+ """
+ if pg_interface is None:
+ pg_interface = self
+ self.test.logger.info("Sending ARP request for %s on port %s" %
+ (self.local_ip4, pg_interface.name))
+ arp_req = self.create_arp_req()
+ pg_interface.add_stream(arp_req)
+ pg_interface.enable_capture()
+ self.test.pg_start()
+ self.test.logger.info(self.test.vapi.cli("show trace"))
+ arp_reply = pg_interface.get_capture()
+ if arp_reply is None or len(arp_reply) == 0:
+ self.test.logger.info(
+ "No ARP received on port %s" %
+ pg_interface.name)
+ return
+ arp_reply = arp_reply[0]
+ # Make Dot1AD packet content recognizable to scapy
+ if arp_reply.type == 0x88a8:
+ arp_reply.type = 0x8100
+ arp_reply = Ether(str(arp_reply))
+ try:
+ if arp_reply[ARP].op == ARP.is_at:
+ self.test.logger.info("VPP %s MAC address is %s " %
+ (self.name, arp_reply[ARP].hwsrc))
+ self._local_mac = arp_reply[ARP].hwsrc
+ else:
+ self.test.logger.info(
+ "No ARP received on port %s" %
+ pg_interface.name)
+ except:
+ self.test.logger.error(
+ ppp("Unexpected response to ARP request:", arp_reply))
+ raise
+
+ def resolve_ndp(self, pg_interface=None):
+ """Resolve NDP using provided packet-generator interface
+
+ :param pg_interface: interface used to resolve, if None then this
+ interface is used
+
+ """
+ if pg_interface is None:
+ pg_interface = self
+ self.test.logger.info("Sending NDP request for %s on port %s" %
+ (self.local_ip6, pg_interface.name))
+ ndp_req = self.create_ndp_req()
+ pg_interface.add_stream(ndp_req)
+ pg_interface.enable_capture()
+ self.test.pg_start()
+ self.test.logger.info(self.test.vapi.cli("show trace"))
+ ndp_reply = pg_interface.get_capture()
+ if ndp_reply is None or len(ndp_reply) == 0:
+ self.test.logger.info(
+ "No NDP received on port %s" %
+ pg_interface.name)
+ return
+ ndp_reply = ndp_reply[0]
+ # Make Dot1AD packet content recognizable to scapy
+ if ndp_reply.type == 0x88a8:
+ ndp_reply.type = 0x8100
+ ndp_reply = Ether(str(ndp_reply))
+ try:
+ ndp_na = ndp_reply[ICMPv6ND_NA]
+ opt = ndp_na[ICMPv6NDOptDstLLAddr]
+ self.test.logger.info("VPP %s MAC address is %s " %
+ (self.name, opt.lladdr))
+ self._local_mac = opt.lladdr
+ except:
+ self.test.logger.error(
+ ppp("Unexpected response to NDP request:", ndp_reply))
+ raise
Code Review / vpp.git / blobdiff