140 lines
5.8 KiB
Python
140 lines
5.8 KiB
Python
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## @package util
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# Module with common functions that should be used by the test cases.
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#
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# The module provides a set of tools for setup the test environment
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from scapy.layers.l2 import Ether, ARP
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from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6NDOptSrcLLAddr
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## Util class
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#
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# Test cases that want to use methods defined in Util class should
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# inherit this class.
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#
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# class Example(Util, VppTestCase):
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# pass
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class Util(object):
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## Class method to send ARP Request for each VPP IPv4 address in
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# order to determine VPP interface MAC address to IPv4 bindings.
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#
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# Resolved MAC address is saved to the VPP_MACS dictionary with interface
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# index as a key. ARP Request is sent from MAC in MY_MACS dictionary with
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# interface index as a key.
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# @param cls The class pointer.
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# @param args List variable to store indices of VPP interfaces.
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@classmethod
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def resolve_arp(cls, args):
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for i in args:
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ip = cls.VPP_IP4S[i]
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cls.log("Sending ARP request for %s on port %u" % (ip, i))
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arp_req = (Ether(dst="ff:ff:ff:ff:ff:ff", src=cls.MY_MACS[i]) /
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ARP(op=ARP.who_has, pdst=ip,
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psrc=cls.MY_IP4S[i], hwsrc=cls.MY_MACS[i]))
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cls.pg_add_stream(i, arp_req)
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cls.pg_enable_capture([i])
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cls.cli(2, "trace add pg-input 1")
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cls.pg_start()
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arp_reply = cls.pg_get_capture(i)[0]
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if arp_reply[ARP].op == ARP.is_at:
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cls.log("VPP pg%u MAC address is %s " % (i, arp_reply[ARP].hwsrc))
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cls.VPP_MACS[i] = arp_reply[ARP].hwsrc
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else:
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cls.log("No ARP received on port %u" % i)
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cls.cli(2, "show trace")
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## @var ip
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# <TODO add description>
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## @var arp_req
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# <TODO add description>
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## @var arp_reply
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# <TODO add description>
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## @var VPP_MACS
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# <TODO add description>
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## Class method to send ND request for each VPP IPv6 address in
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# order to determine VPP MAC address to IPv6 bindings.
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#
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# Resolved MAC address is saved to the VPP_MACS dictionary with interface
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# index as a key. ND Request is sent from MAC in MY_MACS dictionary with
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# interface index as a key.
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# @param cls The class pointer.
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# @param args List variable to store indices of VPP interfaces.
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@classmethod
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def resolve_icmpv6_nd(cls, args):
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for i in args:
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ip = cls.VPP_IP6S[i]
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cls.log("Sending ICMPv6ND_NS request for %s on port %u" % (ip, i))
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nd_req = (Ether(dst="ff:ff:ff:ff:ff:ff", src=cls.MY_MACS[i]) /
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IPv6(src=cls.MY_IP6S[i], dst=ip) /
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ICMPv6ND_NS(tgt=ip) /
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ICMPv6NDOptSrcLLAddr(lladdr=cls.MY_MACS[i]))
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cls.pg_add_stream(i, nd_req)
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cls.pg_enable_capture([i])
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cls.cli(2, "trace add pg-input 1")
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cls.pg_start()
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nd_reply = cls.pg_get_capture(i)[0]
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icmpv6_na = nd_reply['ICMPv6 Neighbor Discovery - Neighbor Advertisement']
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dst_ll_addr = icmpv6_na['ICMPv6 Neighbor Discovery Option - Destination Link-Layer Address']
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cls.VPP_MACS[i] = dst_ll_addr.lladdr
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## @var ip
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# <TODO add description>
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## @var nd_req
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# <TODO add description>
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## @var nd_reply
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# <TODO add description>
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## @var icmpv6_na
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# <TODO add description>
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## @var dst_ll_addr
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# <TODO add description>
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## @var VPP_MACS
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# <TODO add description>
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## Class method to configure IPv4 addresses on VPP interfaces.
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#
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# Set dictionary variables MY_IP4S and VPP_IP4S to IPv4 addresses
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# calculated using interface VPP interface index as a parameter.
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# /24 IPv4 prefix is used, with VPP interface address host part set
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# to .1 and MY address set to .2.
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# Used IPv4 prefix scheme: 172.16.{VPP-interface-index}.0/24.
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# @param cls The class pointer.
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# @param args List variable to store indices of VPP interfaces.
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@classmethod
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def config_ip4(cls, args):
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for i in args:
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cls.MY_IP4S[i] = "172.16.%u.2" % i
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cls.VPP_IP4S[i] = "172.16.%u.1" % i
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cls.api("sw_interface_add_del_address pg%u %s/24" % (i, cls.VPP_IP4S[i]))
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cls.log("My IPv4 address is %s" % (cls.MY_IP4S[i]))
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## @var MY_IP4S
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# Dictionary variable to store host IPv4 addresses connected to packet
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# generator interfaces.
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## @var VPP_IP4S
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# Dictionary variable to store VPP IPv4 addresses of the packet
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# generator interfaces.
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## Class method to configure IPv6 addresses on VPP interfaces.
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#
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# Set dictionary variables MY_IP6S and VPP_IP6S to IPv6 addresses
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# calculated using interface VPP interface index as a parameter.
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# /64 IPv6 prefix is used, with VPP interface address host part set
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# to ::1 and MY address set to ::2.
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# Used IPv6 prefix scheme: fd10:{VPP-interface-index}::0/64.
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# @param cls The class pointer.
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# @param args List variable to store indices of VPP interfaces.
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@classmethod
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def config_ip6(cls, args):
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for i in args:
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cls.MY_IP6S[i] = "fd10:%u::2" % i
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cls.VPP_IP6S[i] = "fd10:%u::1" % i
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cls.api("sw_interface_add_del_address pg%u %s/64" % (i, cls.VPP_IP6S[i]))
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cls.log("My IPv6 address is %s" % (cls.MY_IP6S[i]))
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## @var MY_IP6S
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# Dictionary variable to store host IPv6 addresses connected to packet
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# generator interfaces.
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## @var VPP_IP6S
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# Dictionary variable to store VPP IPv6 addresses of the packet
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# generator interfaces.
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