diff options
Diffstat (limited to 'test/test_ipip.py')
| -rw-r--r-- | test/test_ipip.py | 70 |
1 files changed, 64 insertions, 6 deletions
diff --git a/test/test_ipip.py b/test/test_ipip.py index 3a0c401f8af..dc7b611164f 100644 --- a/test/test_ipip.py +++ b/test/test_ipip.py @@ -2,7 +2,8 @@ """IP{4,6} over IP{v,6} tunnel functional tests""" import unittest -from scapy.layers.inet6 import IPv6, Ether, IP, UDP +from scapy.layers.inet6 import IPv6, Ether, IP, UDP, ICMPv6PacketTooBig +from scapy.layers.inet import ICMP from framework import VppTestCase, VppTestRunner from vpp_ip_route import VppIpRoute, VppRoutePath, DpoProto from socket import AF_INET, AF_INET6, inet_pton @@ -44,12 +45,18 @@ class TestIPIP(VppTestCase): def validate(self, rx, expected): self.assertEqual(rx, expected.__class__(str(expected))) + def validate_bytes(self, rx, expected): + self.assertEqual(rx, expected) + + def payload(self, len): + return 'x' * len + def test_ipip4(self): """ ip{v4,v6} over ip4 test """ p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) p_ip6 = IPv6(src="1::1", dst="DEAD::1", nh='UDP') - p_ip4 = IP(src="1.2.3.4", dst="130.67.0.1") - p_payload = UDP(sport=1234, dport=1234) + p_ip4 = IP(src=self.pg0.remote_ip4, dst="130.67.0.1") + p_payload = UDP(sport=1234, dport=1234) / self.payload(1300) # IPv4 transport rv = self.vapi.ipip_add_tunnel( @@ -98,10 +105,37 @@ class TestIPIP(VppTestCase): dst=self.pg1.remote_ip4) / p_ip4_inner / p_payload) p4_reply.ttl -= 1 p4_reply.id = 0 - rx = self.send_and_expect(self.pg0, p4*10, self.pg1) + rx = self.send_and_expect(self.pg0, p4*11, self.pg1) for p in rx: self.validate(p[1], p4_reply) + # MTU (only checked on encap) + rv = self.vapi.sw_interface_set_mtu(sw_if_index, 576) + rv = self.vapi.sw_interface_dump() + for i in rv: + if i.sw_if_index == sw_if_index: + self.assertEqual(i.mtu, 576) + break + + # Should fail. Too large MTU + p4.flags = 'DF' + p_icmp4 = ICMP(type='dest-unreach', code='fragmentation-needed', + nexthopmtu=576, chksum=0xb6c7) + icmp4_reply = (IP(src=self.pg0.local_ip4, + dst=self.pg0.remote_ip4, + ttl=254, len=576, id=0) / + p_icmp4 / p_ip4 / p_payload) + icmp4_reply[1].flags = 'DF' + n = icmp4_reply.__class__(str(icmp4_reply)) + s = str(icmp4_reply) + icmp4_reply = s[0:576] + rx = self.send_and_expect(self.pg0, p4*9, self.pg0) + for p in rx: + self.validate_bytes(str(p[1]), icmp4_reply) + + # Reset MTU + rv = self.vapi.sw_interface_set_mtu(sw_if_index, 1480) + # Decapsulation p_ether = Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) @@ -128,9 +162,9 @@ class TestIPIP(VppTestCase): def test_ipip6(self): """ ip{v4,v6} over ip6 test """ p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) - p_ip6 = IPv6(src="1::1", dst="DEAD::1", nh='UDP') + p_ip6 = IPv6(src=self.pg0.remote_ip6, dst="DEAD::1", nh='UDP') p_ip4 = IP(src="1.2.3.4", dst="130.67.0.1") - p_payload = UDP(sport=1234, dport=1234) + p_payload = UDP(sport=1234, dport=1234) / self.payload(1300) # IPv6 transport rv = self.vapi.ipip_add_tunnel( @@ -169,6 +203,30 @@ class TestIPIP(VppTestCase): for p in rx: self.validate(p[1], p6_reply) + # MTU (only checked on encap) + rv = self.vapi.sw_interface_set_mtu(sw_if_index, 1280) + rv = self.vapi.sw_interface_dump() + for i in rv: + if i.sw_if_index == sw_if_index: + self.assertEqual(i.mtu, 1280) + break + + # Should fail. Too large MTU + p_icmp6 = ICMPv6PacketTooBig(mtu=1280, cksum=0xd401) + icmp6_reply = (IPv6(src=self.pg0.local_ip6, + dst=self.pg0.remote_ip6, + hlim=254, plen=1240) / + p_icmp6 / p_ip6 / p_payload) + icmp6_reply[2].hlim -= 1 + s = str(icmp6_reply) + icmp6_reply = s[0:1280] + rx = self.send_and_expect(self.pg0, p6*9, self.pg0) + for p in rx: + self.validate_bytes(str(p[1]), icmp6_reply) + + # Reset MTU + rv = self.vapi.sw_interface_set_mtu(sw_if_index, 1460) + # IPv4 in to IPv6 tunnel p4 = (p_ether / p_ip4 / p_payload) p4_reply = (IPv6(src=self.pg0.local_ip6, |