import unittest
import socket
+import struct
from framework import VppTestCase, VppTestRunner
+from vpp_neighbor import VppNeighbor
+from vpp_ip_route import find_route, VppIpTable
+from util import mk_ll_addr
-from scapy.layers.l2 import Ether, getmacbyip
+from scapy.layers.l2 import Ether, getmacbyip, ARP
from scapy.layers.inet import IP, UDP, ICMP
from scapy.layers.inet6 import IPv6, in6_getnsmac, in6_mactoifaceid
from scapy.layers.dhcp import DHCP, BOOTP, DHCPTypes
from scapy.layers.dhcp6 import DHCP6, DHCP6_Solicit, DHCP6_RelayForward, \
DHCP6_RelayReply, DHCP6_Advertise, DHCP6OptRelayMsg, DHCP6OptIfaceId, \
- DHCP6OptStatusCode, DHCP6OptVSS, DHCP6OptClientLinkLayerAddr
+ DHCP6OptStatusCode, DHCP6OptVSS, DHCP6OptClientLinkLayerAddr, DHCP6_Request
from socket import AF_INET, AF_INET6
from scapy.utils import inet_pton, inet_ntop
from scapy.utils6 import in6_ptop
+from util import mactobinary
DHCP4_CLIENT_PORT = 68
DHCP4_SERVER_PORT = 67
DHCP6_SERVER_PORT = 546
-def mk_ll_addr(mac):
-
- euid = in6_mactoifaceid(mac)
- addr = "fe80::" + euid
- return addr
-
-
class TestDHCP(VppTestCase):
""" DHCP Test Case """
# create 3 pg interfaces
self.create_pg_interfaces(range(4))
+ self.tables = []
# pg0 and 1 are IP configured in VRF 0 and 1.
# pg2 and 3 are non IP-configured in VRF 0 and 1
+ table_id = 0
+ for table_id in range(1, 4):
+ tbl4 = VppIpTable(self, table_id)
+ tbl4.add_vpp_config()
+ self.tables.append(tbl4)
+ tbl6 = VppIpTable(self, table_id, is_ip6=1)
+ tbl6.add_vpp_config()
+ self.tables.append(tbl6)
+
table_id = 0
for i in self.pg_interfaces[:2]:
i.admin_up()
i.set_table_ip6(table_id)
table_id += 1
+ def tearDown(self):
+ for i in self.pg_interfaces[:2]:
+ i.unconfig_ip4()
+ i.unconfig_ip6()
+
+ for i in self.pg_interfaces:
+ i.set_table_ip4(0)
+ i.set_table_ip6(0)
+ i.admin_down()
+ super(TestDHCP, self).tearDown()
+
def send_and_assert_no_replies(self, intf, pkts, remark):
intf.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
for i in self.pg_interfaces:
i.assert_nothing_captured(remark=remark)
+ def verify_dhcp_has_option(self, pkt, option, value):
+ dhcp = pkt[DHCP]
+ found = False
+
+ for i in dhcp.options:
+ if type(i) is tuple:
+ if i[0] == option:
+ self.assertEqual(i[1], value)
+ found = True
+
+ self.assertTrue(found)
+
def validate_relay_options(self, pkt, intf, ip_addr, fib_id, oui):
dhcp = pkt[DHCP]
found = 0
return data
- def verify_dhcp_offer(self, pkt, intf):
+ def verify_dhcp_msg_type(self, pkt, name):
+ dhcp = pkt[DHCP]
+ found = False
+ for o in dhcp.options:
+ if type(o) is tuple:
+ if o[0] == "message-type" \
+ and DHCPTypes[o[1]] == name:
+ found = True
+ self.assertTrue(found)
+
+ def verify_dhcp_offer(self, pkt, intf, fib_id=0, oui=0):
ether = pkt[Ether]
self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
self.assertEqual(ether.src, intf.local_mac)
self.assertEqual(udp.dport, DHCP4_CLIENT_PORT)
self.assertEqual(udp.sport, DHCP4_SERVER_PORT)
- dhcp = pkt[DHCP]
- is_offer = False
- for o in dhcp.options:
- if type(o) is tuple:
- if o[0] == "message-type" \
- and DHCPTypes[o[1]] == "offer":
- is_offer = True
- self.assertTrue(is_offer)
+ self.verify_dhcp_msg_type(pkt, "offer")
+ data = self.validate_relay_options(pkt, intf, intf.local_ip4,
+ fib_id, oui)
- data = self.validate_relay_options(pkt, intf, intf.local_ip4, 0, 0)
+ def verify_orig_dhcp_pkt(self, pkt, intf):
+ ether = pkt[Ether]
+ self.assertEqual(ether.dst, "ff:ff:ff:ff:ff:ff")
+ self.assertEqual(ether.src, intf.local_mac)
+
+ ip = pkt[IP]
+ self.assertEqual(ip.dst, "255.255.255.255")
+ self.assertEqual(ip.src, "0.0.0.0")
+
+ udp = pkt[UDP]
+ self.assertEqual(udp.dport, DHCP4_SERVER_PORT)
+ self.assertEqual(udp.sport, DHCP4_CLIENT_PORT)
+
+ def verify_orig_dhcp_discover(self, pkt, intf, hostname, client_id=None):
+ self.verify_orig_dhcp_pkt(pkt, intf)
+
+ self.verify_dhcp_msg_type(pkt, "discover")
+ self.verify_dhcp_has_option(pkt, "hostname", hostname)
+ if client_id:
+ self.verify_dhcp_has_option(pkt, "client_id", client_id)
+ bootp = pkt[BOOTP]
+ self.assertEqual(bootp.ciaddr, "0.0.0.0")
+ self.assertEqual(bootp.giaddr, "0.0.0.0")
+ self.assertEqual(bootp.flags, 0x8000)
+
+ def verify_orig_dhcp_request(self, pkt, intf, hostname, ip):
+ self.verify_orig_dhcp_pkt(pkt, intf)
+
+ self.verify_dhcp_msg_type(pkt, "request")
+ self.verify_dhcp_has_option(pkt, "hostname", hostname)
+ self.verify_dhcp_has_option(pkt, "requested_addr", ip)
+ bootp = pkt[BOOTP]
+ self.assertEqual(bootp.ciaddr, "0.0.0.0")
+ self.assertEqual(bootp.giaddr, "0.0.0.0")
+ self.assertEqual(bootp.flags, 0x8000)
+
+ def verify_relayed_dhcp_discover(self, pkt, intf, src_intf=None,
+ fib_id=0, oui=0,
+ dst_mac=None, dst_ip=None):
+ if not dst_mac:
+ dst_mac = intf.remote_mac
+ if not dst_ip:
+ dst_ip = intf.remote_ip4
- def verify_dhcp_discover(self, pkt, intf, src_intf=None, fib_id=0, oui=0):
ether = pkt[Ether]
- self.assertEqual(ether.dst, intf.remote_mac)
+ self.assertEqual(ether.dst, dst_mac)
self.assertEqual(ether.src, intf.local_mac)
ip = pkt[IP]
- self.assertEqual(ip.dst, intf.remote_ip4)
+ self.assertEqual(ip.dst, dst_ip)
self.assertEqual(ip.src, intf.local_ip4)
udp = pkt[UDP]
def verify_dhcp6_solicit(self, pkt, intf,
peer_ip, peer_mac,
fib_id=0,
- oui=0):
+ oui=0,
+ dst_mac=None,
+ dst_ip=None):
+ if not dst_mac:
+ dst_mac = intf.remote_mac
+ if not dst_ip:
+ dst_ip = in6_ptop(intf.remote_ip6)
+
ether = pkt[Ether]
- self.assertEqual(ether.dst, intf.remote_mac)
+ self.assertEqual(ether.dst, dst_mac)
self.assertEqual(ether.src, intf.local_mac)
ip = pkt[IPv6]
- self.assertEqual(in6_ptop(ip.dst), in6_ptop(intf.remote_ip6))
+ self.assertEqual(in6_ptop(ip.dst), dst_ip)
self.assertEqual(in6_ptop(ip.src), in6_ptop(intf.local_ip6))
udp = pkt[UDP]
#
# Inject a response from the server
# dropped, because there is no IP addrees on the
- # clinet interfce to fill in the option.
+ # client interfce to fill in the option.
#
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
rx = self.pg0.get_capture(1)
rx = rx[0]
- option_82 = self.verify_dhcp_discover(rx, self.pg0, src_intf=self.pg2)
+ option_82 = self.verify_relayed_dhcp_discover(rx, self.pg0,
+ src_intf=self.pg2)
#
# Create an DHCP offer reply from the server with a correctly formatted
rx = self.pg1.get_capture(1)
rx = rx[0]
- self.verify_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
+ self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
#
# Add VSS config
rx = self.pg1.get_capture(1)
rx = rx[0]
- self.verify_dhcp_discover(rx, self.pg1, src_intf=self.pg3,
- fib_id=1, oui=4)
+ self.verify_relayed_dhcp_discover(rx, self.pg1,
+ src_intf=self.pg3,
+ fib_id=1, oui=4)
+
+ #
+ # Add a second DHCP server in VRF 1
+ # expect clients messages to be relay to both configured servers
+ #
+ self.pg1.generate_remote_hosts(2)
+ server_addr2 = socket.inet_pton(AF_INET, self.pg1.remote_hosts[1].ip4)
+
+ self.vapi.dhcp_proxy_config(server_addr2,
+ src_addr,
+ rx_table_id=1,
+ server_table_id=1,
+ is_add=1)
+
+ #
+ # We'll need an ARP entry for the server to send it packets
+ #
+ arp_entry = VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_hosts[1].mac,
+ self.pg1.remote_hosts[1].ip4)
+ arp_entry.add_vpp_config()
+
+ #
+ # Send a discover from the client. expect two relayed messages
+ # The frist packet is sent to the second server
+ # We're not enforcing that here, it's just the way it is.
+ #
+ self.pg3.add_stream(pkts_disc_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(2)
+
+ option_82 = self.verify_relayed_dhcp_discover(
+ rx[0], self.pg1,
+ src_intf=self.pg3,
+ dst_mac=self.pg1.remote_hosts[1].mac,
+ dst_ip=self.pg1.remote_hosts[1].ip4,
+ fib_id=1, oui=4)
+ self.verify_relayed_dhcp_discover(rx[1], self.pg1,
+ src_intf=self.pg3,
+ fib_id=1, oui=4)
+
+ #
+ # Send both packets back. Client gets both.
+ #
+ p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'offer'),
+ ('relay_agent_Information', option_82),
+ ('end')]))
+ p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src=self.pg1.remote_hosts[1].ip4, dst=self.pg1.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'offer'),
+ ('relay_agent_Information', option_82),
+ ('end')]))
+ pkts = [p1, p2]
+
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg3.get_capture(2)
+
+ self.verify_dhcp_offer(rx[0], self.pg3, fib_id=1, oui=4)
+ self.verify_dhcp_offer(rx[1], self.pg3, fib_id=1, oui=4)
+
+ #
+ # Ensure offers from non-servers are dropeed
+ #
+ p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IP(src="8.8.8.8", dst=self.pg1.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'offer'),
+ ('relay_agent_Information', option_82),
+ ('end')]))
+ self.send_and_assert_no_replies(self.pg1, p2,
+ "DHCP offer from non-server")
+
+ #
+ # Ensure only the discover is sent to multiple servers
+ #
+ p_req_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff",
+ src=self.pg3.remote_mac) /
+ IP(src="0.0.0.0", dst="255.255.255.255") /
+ UDP(sport=DHCP4_CLIENT_PORT,
+ dport=DHCP4_SERVER_PORT) /
+ BOOTP(op=1) /
+ DHCP(options=[('message-type', 'request'),
+ ('end')]))
+
+ self.pg3.add_stream(p_req_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+
+ #
+ # Remove the second DHCP server
+ #
+ self.vapi.dhcp_proxy_config(server_addr2,
+ src_addr,
+ rx_table_id=1,
+ server_table_id=1,
+ is_add=0)
+
+ #
+ # Test we can still relay with the first
+ #
+ self.pg3.add_stream(pkts_disc_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+ rx = rx[0]
+ self.verify_relayed_dhcp_discover(rx, self.pg1,
+ src_intf=self.pg3,
+ fib_id=1, oui=4)
#
# Remove the VSS config
rx = self.pg1.get_capture(1)
rx = rx[0]
- self.verify_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
+ self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
#
# remove DHCP config to cleanup
self.vapi.dhcp_proxy_config(server_addr,
src_addr,
rx_table_id=1,
- server_table_id=11,
+ server_table_id=1,
is_add=0)
self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
"DHCP cleanup VRF 0")
self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
"DHCP cleanup VRF 1")
+ self.pg2.unconfig_ip4()
+ self.pg3.unconfig_ip4()
def test_dhcp6_proxy(self):
""" DHCPv6 Proxy"""
UDP(sport=DHCP6_SERVER_PORT,
dport=DHCP6_CLIENT_PORT) /
DHCP6_Solicit())
- pkts_solicit_vrf0 = [p_solicit_vrf0]
p_solicit_vrf1 = (Ether(dst=dmac, src=self.pg3.remote_mac) /
IPv6(src=dhcp_solicit_src_vrf1,
dst=dhcp_solicit_dst) /
UDP(sport=DHCP6_SERVER_PORT,
dport=DHCP6_CLIENT_PORT) /
DHCP6_Solicit())
- pkts_solicit_vrf1 = [p_solicit_vrf1]
- self.send_and_assert_no_replies(self.pg2, pkts_solicit_vrf0,
+ self.send_and_assert_no_replies(self.pg2, p_solicit_vrf0,
"DHCP with no configuration")
- self.send_and_assert_no_replies(self.pg3, pkts_solicit_vrf1,
+ self.send_and_assert_no_replies(self.pg3, p_solicit_vrf1,
"DHCP with no configuration")
#
server_table_id=0,
is_ipv6=1)
- self.send_and_assert_no_replies(self.pg2, pkts_solicit_vrf0,
+ self.send_and_assert_no_replies(self.pg2, p_solicit_vrf0,
"DHCP with no configuration")
- self.send_and_assert_no_replies(self.pg3, pkts_solicit_vrf1,
+ self.send_and_assert_no_replies(self.pg3, p_solicit_vrf1,
"DHCP with no configuration")
#
#
# Now the DHCP requests are relayed to the server
#
- self.pg2.add_stream(pkts_solicit_vrf0)
+ self.pg2.add_stream(p_solicit_vrf0)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_solicit(rx, self.pg0,
+
+ self.verify_dhcp6_solicit(rx[0], self.pg0,
dhcp_solicit_src_vrf0,
self.pg2.remote_mac)
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_Advertise())
- pkts_adv_vrf0 = [p_adv_vrf0]
- self.send_and_assert_no_replies(self.pg2, pkts_adv_vrf0,
+ self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP6 not a relay reply")
# 2 - no relay message option
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply() /
DHCP6_Advertise())
- pkts_adv_vrf0 = [p_adv_vrf0]
- self.send_and_assert_no_replies(self.pg2, pkts_adv_vrf0,
+ self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP not a relay message")
# 3 - no circuit ID
DHCP6_RelayReply() /
DHCP6OptRelayMsg(optlen=0) /
DHCP6_Advertise())
- pkts_adv_vrf0 = [p_adv_vrf0]
- self.send_and_assert_no_replies(self.pg2, pkts_adv_vrf0,
+ self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP6 no circuit ID")
# 4 - wrong circuit ID
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
DHCP6OptRelayMsg(optlen=0) /
DHCP6_Advertise())
- pkts_adv_vrf0 = [p_adv_vrf0]
- self.send_and_assert_no_replies(self.pg2, pkts_adv_vrf0,
+ self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP6 wrong circuit ID")
#
self.pg_start()
rx = self.pg2.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_advert(rx, self.pg2, "::")
+
+ self.verify_dhcp6_advert(rx[0], self.pg2, "::")
#
# Send the relay response (the advertisement)
self.pg_start()
rx = self.pg2.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_advert(rx, self.pg2, dhcp_solicit_src_vrf0)
+
+ self.verify_dhcp6_advert(rx[0], self.pg2, dhcp_solicit_src_vrf0)
#
# Add all the config for VRF 1
#
# VRF 1 solicit
#
- self.pg3.add_stream(pkts_solicit_vrf1)
+ self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_solicit(rx, self.pg1,
+
+ self.verify_dhcp6_solicit(rx[0], self.pg1,
dhcp_solicit_src_vrf1,
self.pg3.remote_mac)
self.pg_start()
rx = self.pg3.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_advert(rx, self.pg3, dhcp_solicit_src_vrf1)
+
+ self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf1)
#
# Add VSS config
# table=1, fib=id=1, oui=4
self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_ip6=1)
- self.pg3.add_stream(pkts_solicit_vrf1)
+ self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_solicit(rx, self.pg1,
+
+ self.verify_dhcp6_solicit(rx[0], self.pg1,
dhcp_solicit_src_vrf1,
self.pg3.remote_mac,
fib_id=1,
#
self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_ip6=1, is_add=0)
- self.pg3.add_stream(pkts_solicit_vrf1)
+ self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
- rx = rx[0]
- self.verify_dhcp6_solicit(rx, self.pg1,
+
+ self.verify_dhcp6_solicit(rx[0], self.pg1,
dhcp_solicit_src_vrf1,
self.pg3.remote_mac)
#
- # Cleanup
+ # Add a second DHCP server in VRF 1
+ # expect clients messages to be relay to both configured servers
#
- self.vapi.dhcp_proxy_config(server_addr_vrf1,
+ self.pg1.generate_remote_hosts(2)
+ server_addr2 = socket.inet_pton(AF_INET6, self.pg1.remote_hosts[1].ip6)
+
+ self.vapi.dhcp_proxy_config(server_addr2,
+ src_addr_vrf1,
+ rx_table_id=1,
+ server_table_id=1,
+ is_ipv6=1)
+
+ #
+ # We'll need an ND entry for the server to send it packets
+ #
+ nd_entry = VppNeighbor(self,
+ self.pg1.sw_if_index,
+ self.pg1.remote_hosts[1].mac,
+ self.pg1.remote_hosts[1].ip6,
+ af=AF_INET6)
+ nd_entry.add_vpp_config()
+
+ #
+ # Send a discover from the client. expect two relayed messages
+ # The frist packet is sent to the second server
+ # We're not enforcing that here, it's just the way it is.
+ #
+ self.pg3.add_stream(p_solicit_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(2)
+
+ self.verify_dhcp6_solicit(rx[0], self.pg1,
+ dhcp_solicit_src_vrf1,
+ self.pg3.remote_mac)
+ self.verify_dhcp6_solicit(rx[1], self.pg1,
+ dhcp_solicit_src_vrf1,
+ self.pg3.remote_mac,
+ dst_mac=self.pg1.remote_hosts[1].mac,
+ dst_ip=self.pg1.remote_hosts[1].ip6)
+
+ #
+ # Send both packets back. Client gets both.
+ #
+ p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
+ IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
+ UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
+ DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
+ DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
+ DHCP6OptRelayMsg(optlen=0) /
+ DHCP6_Advertise(trid=1) /
+ DHCP6OptStatusCode(statuscode=0))
+ p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
+ IPv6(dst=self.pg1.local_ip6, src=self.pg1._remote_hosts[1].ip6) /
+ UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
+ DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
+ DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
+ DHCP6OptRelayMsg(optlen=0) /
+ DHCP6_Advertise(trid=1) /
+ DHCP6OptStatusCode(statuscode=0))
+
+ pkts = [p1, p2]
+
+ self.pg1.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg3.get_capture(2)
+
+ self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf1)
+ self.verify_dhcp6_advert(rx[1], self.pg3, dhcp_solicit_src_vrf1)
+
+ #
+ # Ensure only solicit messages are duplicated
+ #
+ p_request_vrf1 = (Ether(dst=dmac, src=self.pg3.remote_mac) /
+ IPv6(src=dhcp_solicit_src_vrf1,
+ dst=dhcp_solicit_dst) /
+ UDP(sport=DHCP6_SERVER_PORT,
+ dport=DHCP6_CLIENT_PORT) /
+ DHCP6_Request())
+
+ self.pg3.add_stream(p_request_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+
+ #
+ # Test we drop DHCP packets from addresses that are not configured as
+ # DHCP servers
+ #
+ p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
+ IPv6(dst=self.pg1.local_ip6, src="3001::1") /
+ UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
+ DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
+ DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
+ DHCP6OptRelayMsg(optlen=0) /
+ DHCP6_Advertise(trid=1) /
+ DHCP6OptStatusCode(statuscode=0))
+ self.send_and_assert_no_replies(self.pg1, p2,
+ "DHCP6 not from server")
+
+ #
+ # Remove the second DHCP server
+ #
+ self.vapi.dhcp_proxy_config(server_addr2,
src_addr_vrf1,
rx_table_id=1,
server_table_id=1,
is_ipv6=1,
is_add=0)
+
+ #
+ # Test we can still relay with the first
+ #
+ self.pg3.add_stream(p_solicit_vrf1)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg1.get_capture(1)
+
+ self.verify_dhcp6_solicit(rx[0], self.pg1,
+ dhcp_solicit_src_vrf1,
+ self.pg3.remote_mac)
+
+ #
+ # Cleanup
+ #
self.vapi.dhcp_proxy_config(server_addr_vrf1,
src_addr_vrf1,
+ rx_table_id=1,
+ server_table_id=1,
+ is_ipv6=1,
+ is_add=0)
+ self.vapi.dhcp_proxy_config(server_addr_vrf0,
+ src_addr_vrf0,
+ rx_table_id=0,
+ server_table_id=0,
+ is_ipv6=1,
+ is_add=0)
+
+ # duplicate delete
+ self.vapi.dhcp_proxy_config(server_addr_vrf0,
+ src_addr_vrf0,
rx_table_id=0,
server_table_id=0,
is_ipv6=1,
is_add=0)
+ self.pg2.unconfig_ip6()
+ self.pg3.unconfig_ip6()
+
+ def test_dhcp_client(self):
+ """ DHCP Client"""
+
+ hostname = 'universal-dp'
+
+ self.pg_enable_capture(self.pg_interfaces)
+
+ #
+ # Configure DHCP client on PG2 and capture the discover sent
+ #
+ self.vapi.dhcp_client(self.pg2.sw_if_index, hostname)
+
+ rx = self.pg2.get_capture(1)
+
+ self.verify_orig_dhcp_discover(rx[0], self.pg2, hostname)
+
+ #
+ # Sned back on offer, expect the request
+ #
+ p_offer = (Ether(dst=self.pg2.local_mac, src=self.pg2.remote_mac) /
+ IP(src=self.pg2.remote_ip4, dst="255.255.255.255") /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
+ BOOTP(op=1, yiaddr=self.pg2.local_ip4) /
+ DHCP(options=[('message-type', 'offer'),
+ ('server_id', self.pg2.remote_ip4),
+ ('end')]))
+
+ self.pg2.add_stream(p_offer)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+ self.verify_orig_dhcp_request(rx[0], self.pg2, hostname,
+ self.pg2.local_ip4)
+
+ #
+ # Send an acknowloedgement
+ #
+ p_ack = (Ether(dst=self.pg2.local_mac, src=self.pg2.remote_mac) /
+ IP(src=self.pg2.remote_ip4, dst="255.255.255.255") /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
+ BOOTP(op=1, yiaddr=self.pg2.local_ip4) /
+ DHCP(options=[('message-type', 'ack'),
+ ('subnet_mask', "255.255.255.0"),
+ ('router', self.pg2.remote_ip4),
+ ('server_id', self.pg2.remote_ip4),
+ ('lease_time', 43200),
+ ('end')]))
+
+ self.pg2.add_stream(p_ack)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ #
+ # We'll get an ARP request for the router address
+ #
+ rx = self.pg2.get_capture(1)
+
+ self.assertEqual(rx[0][ARP].pdst, self.pg2.remote_ip4)
+ self.pg_enable_capture(self.pg_interfaces)
+
+ #
+ # At the end of this procedure there should be a connected route
+ # in the FIB
+ #
+ self.assertTrue(find_route(self, self.pg2.local_ip4, 24))
+ self.assertTrue(find_route(self, self.pg2.local_ip4, 32))
+
+ # remove the left over ARP entry
+ self.vapi.ip_neighbor_add_del(self.pg2.sw_if_index,
+ mactobinary(self.pg2.remote_mac),
+ self.pg2.remote_ip4,
+ is_add=0)
+ #
+ # remove the DHCP config
+ #
+ self.vapi.dhcp_client(self.pg2.sw_if_index, hostname, is_add=0)
+
+ #
+ # and now the route should be gone
+ #
+ self.assertFalse(find_route(self, self.pg2.local_ip4, 32))
+ self.assertFalse(find_route(self, self.pg2.local_ip4, 24))
+
+ #
+ # Start the procedure again. this time have VPP send the client-ID
+ #
+ self.pg2.admin_down()
+ self.sleep(1)
+ self.pg2.admin_up()
+ self.vapi.dhcp_client(self.pg2.sw_if_index, hostname,
+ client_id=self.pg2.local_mac)
+
+ rx = self.pg2.get_capture(1)
+
+ self.verify_orig_dhcp_discover(rx[0], self.pg2, hostname,
+ self.pg2.local_mac)
+
+ self.pg2.add_stream(p_offer)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+ self.verify_orig_dhcp_request(rx[0], self.pg2, hostname,
+ self.pg2.local_ip4)
+
+ #
+ # unicast the ack to the offered address
+ #
+ p_ack = (Ether(dst=self.pg2.local_mac, src=self.pg2.remote_mac) /
+ IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) /
+ UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_CLIENT_PORT) /
+ BOOTP(op=1, yiaddr=self.pg2.local_ip4) /
+ DHCP(options=[('message-type', 'ack'),
+ ('subnet_mask', "255.255.255.0"),
+ ('router', self.pg2.remote_ip4),
+ ('server_id', self.pg2.remote_ip4),
+ ('lease_time', 43200),
+ ('end')]))
+
+ self.pg2.add_stream(p_ack)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ #
+ # At the end of this procedure there should be a connected route
+ # in the FIB
+ #
+ self.assertTrue(find_route(self, self.pg2.local_ip4, 32))
+ self.assertTrue(find_route(self, self.pg2.local_ip4, 24))
+
+ #
+ # remove the DHCP config
+ #
+ self.vapi.dhcp_client(self.pg2.sw_if_index, hostname, is_add=0)
+
+ self.assertFalse(find_route(self, self.pg2.local_ip4, 32))
+ self.assertFalse(find_route(self, self.pg2.local_ip4, 24))
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff