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VPP-1283: IPv6 PMTU missing MTU value in ICMP6 message.

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Fix GRE/IPv6 setting of ip->payload_length (which has never worked).

Change-Id: Ie68f1cc7bbb70489d6ec97356132c783f2345e1e
Signed-off-by: Ole Troan <ot@cisco.com>
This commit is contained in:
Ole Troan
2018-05-23 11:21:42 +02:00
committed by Florin Coras
parent 8a9c8f1412
commit da6e11b47d
4 changed files with 43 additions and 25 deletions
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16
test/test_mtu.py
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@ -165,16 +165,22 @@ class TestMTU(VppTestCase):
self.validate(reass_pkt, p4_reply)
'''
# Reset MTU
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, current_mtu)
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index,
current_mtu + mtu_offset)
@unittest.skip("Enable when IPv6 fragmentation is added")
def test_ip6_mtu(self):
""" IP6 MTU test """
#
# TODO: Link MTU is 216 bytes 'off'. Fix when L3 MTU patches committed
#
mtu_offset = 216
current_mtu = self.get_mtu(self.pg1.sw_if_index)
current_mtu -= mtu_offset
p_ether = Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
p_ip6 = IPv6(src=self.pg0.remote_ip6, dst=self.pg1.remote_ip6)
current_mtu = self.get_mtu(self.pg1.sw_if_index)
p_payload = UDP(sport=1234, dport=1234) / self.payload(
current_mtu - 40 - 8)
@ -186,8 +192,8 @@ class TestMTU(VppTestCase):
self.validate(p[1], p6_reply)
# MTU (only checked on encap)
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, 1280)
self.assertEqual(1280, self.get_mtu(self.pg1.sw_if_index))
self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, 1280 + mtu_offset)
self.assertEqual(1280, self.get_mtu(self.pg1.sw_if_index) - mtu_offset)
# Should fail. Too large MTU
p_icmp6 = ICMPv6PacketTooBig(mtu=1280, cksum=0x4c7a)