def send_packet(self, msg_type, t1=None, t2=None, iapdopt=None):
if t1 is None:
t1 = self.T1
if t2 is None:
t2 = self.T2
if iapdopt is None:
opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2)
else:
opt_ia_pd = DHCP6OptIA_PD(iaid=1, T1=t1, T2=t2, iapdopt=iapdopt)
p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) / IPv6(
src=mk_ll_addr(self.pg0.remote_mac), dst=self.pg0.local_ip6_ll) /
UDP(sport=547, dport=546) / msg_type(trid=self.trid) /
DHCP6OptServerId(duid=self.server_duid) /
DHCP6OptClientId(duid=self.client_duid) / opt_ia_pd)
self.pg0.add_stream([p])
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
def test_dhcp_pd_send_solicit_receive_advertise(self):
"""Verify DHCPv6 PD Solicit packet and Advertise event"""
self.vapi.dhcp6_clients_enable_disable(enable=1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
prefix = {
"prefix": {"address": "1:2:3::", "len": 50},
"preferred_time": 60,
"valid_time": 120,
}
prefixes = [prefix]
self.vapi.dhcp6_pd_send_client_message(
server_index=0xFFFFFFFF,
mrc=1,
msg_type=VppEnum.vl_api_dhcpv6_msg_type_t.DHCPV6_MSG_API_SOLICIT,
sw_if_index=self.pg0.sw_if_index,
T1=20,
T2=40,
prefixes=prefixes,
n_prefixes=len(prefixes),
)
rx_list = self.pg0.get_capture(1)
self.assertEqual(len(rx_list), 1)
packet = rx_list[0]
self.assertEqual(packet.haslayer(IPv6), 1)
self.assertEqual(packet[IPv6].haslayer(DHCP6_Solicit), 1)
client_duid = packet[DHCP6OptClientId].duid
trid = packet[DHCP6_Solicit].trid
dst = ip6_normalize(packet[IPv6].dst)
dst2 = ip6_normalize("ff02::1:2")
self.assert_equal(dst, dst2)
src = ip6_normalize(packet[IPv6].src)
src2 = ip6_normalize(self.pg0.local_ip6_ll)
self.assert_equal(src, src2)
ia_pd = packet[DHCP6OptIA_PD]
self.assert_equal(ia_pd.T1, 20)
self.assert_equal(ia_pd.T2, 40)
self.assert_equal(len(ia_pd.iapdopt), 1)
prefix = ia_pd.iapdopt[0]
self.assert_equal(prefix.prefix, "1:2:3::")
self.assert_equal(prefix.plen, 50)
self.assert_equal(prefix.preflft, 60)
self.assert_equal(prefix.validlft, 120)
self.vapi.want_dhcp6_pd_reply_events(enable_disable=1, pid=os.getpid())
try:
ia_pd_opts = DHCP6OptIAPrefix(
prefix="7:8::", plen=56, preflft=60, validlft=120
)
p = (
Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
/ IPv6(
src=util.mk_ll_addr(self.pg0.remote_mac), dst=self.pg0.local_ip6_ll
)
/ UDP(sport=547, dport=546)
/ DHCP6_Advertise(trid=trid)
/ DHCP6OptServerId(duid=self.server_duid)
/ DHCP6OptClientId(duid=client_duid)
/ DHCP6OptPref(prefval=7)
/ DHCP6OptStatusCode(statuscode=1)
/ DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts)
)
self.pg0.add_stream([p])
self.pg_start()
ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event")
self.assert_equal(ev.preference, 7)
self.assert_equal(ev.status_code, 1)
self.assert_equal(ev.T1, 20)
self.assert_equal(ev.T2, 40)
reported_prefix = ev.prefixes[0]
prefix = ia_pd_opts.getfieldval("prefix")
self.assert_equal(str(reported_prefix.prefix).split("/")[0], prefix)
self.assert_equal(
int(str(reported_prefix.prefix).split("/")[1]),
ia_pd_opts.getfieldval("plen"),
)
self.assert_equal(
reported_prefix.preferred_time, ia_pd_opts.getfieldval("preflft")
)
self.assert_equal(
reported_prefix.valid_time, ia_pd_opts.getfieldval("validlft")
)
finally:
self.vapi.want_dhcp6_pd_reply_events(enable_disable=0)
self.vapi.dhcp6_clients_enable_disable(enable=0)
def test_dhcp_pd_send_solicit_receive_advertise(self):
""" Verify DHCPv6 PD Solicit packet and Advertise envent """
self.vapi.dhcp6_clients_enable_disable()
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
prefix_bin = '\00\01\00\02\00\03' + '\00' * 10
prefix = {'prefix': prefix_bin,
'prefix_length': 50,
'preferred_time': 60,
'valid_time': 120}
self.vapi.dhcp6_pd_send_client_message(1, self.pg0.sw_if_index,
T1=20, T2=40, prefixes=[prefix])
rx_list = self.pg0.get_capture(1)
self.assertEqual(len(rx_list), 1)
packet = rx_list[0]
self.assertTrue(packet.haslayer(IPv6))
self.assertTrue(packet[IPv6].haslayer(DHCP6_Solicit))
client_duid = packet[DHCP6OptClientId].duid
trid = packet[DHCP6_Solicit].trid
dst = ip6_normalize(packet[IPv6].dst)
dst2 = ip6_normalize("ff02::1:2")
self.assert_equal(dst, dst2)
src = ip6_normalize(packet[IPv6].src)
src2 = ip6_normalize(self.pg0.local_ip6_ll)
self.assert_equal(src, src2)
ia_pd = packet[DHCP6OptIA_PD]
self.assert_equal(ia_pd.T1, 20)
self.assert_equal(ia_pd.T2, 40)
self.assert_equal(len(ia_pd.iapdopt), 1)
prefix = ia_pd.iapdopt[0]
self.assert_equal(prefix.prefix, '1:2:3::')
self.assert_equal(prefix.plen, 50)
self.assert_equal(prefix.preflft, 60)
self.assert_equal(prefix.validlft, 120)
self.vapi.want_dhcp6_pd_reply_events()
try:
ia_pd_opts = DHCP6OptIAPrefix(prefix='7:8::', plen=56, preflft=60,
validlft=120)
p = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IPv6(src=mk_ll_addr(self.pg0.remote_mac),
dst=self.pg0.local_ip6_ll) /
UDP(sport=547, dport=546) /
DHCP6_Advertise(trid=trid) /
DHCP6OptServerId(duid=self.server_duid) /
DHCP6OptClientId(duid=client_duid) /
DHCP6OptPref(prefval=7) /
DHCP6OptStatusCode(statuscode=1) /
DHCP6OptIA_PD(iaid=1, T1=20, T2=40, iapdopt=ia_pd_opts)
)
self.pg0.add_stream([p])
self.pg_start()
ev = self.vapi.wait_for_event(1, "dhcp6_pd_reply_event")
self.assert_equal(ev.preference, 7)
self.assert_equal(ev.status_code, 1)
self.assert_equal(ev.T1, 20)
self.assert_equal(ev.T2, 40)
reported_prefix = ev.prefixes[0]
prefix = inet_pton(AF_INET6, ia_pd_opts.getfieldval("prefix"))
self.assert_equal(reported_prefix.prefix, prefix)
self.assert_equal(reported_prefix.prefix_length,
ia_pd_opts.getfieldval("plen"))
self.assert_equal(reported_prefix.preferred_time,
ia_pd_opts.getfieldval("preflft"))
self.assert_equal(reported_prefix.valid_time,
ia_pd_opts.getfieldval("validlft"))
finally:
self.vapi.want_dhcp6_pd_reply_events(enable_disable=0)