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authorNeale Ranns <nranns@cisco.com>2017-03-11 05:55:21 -0800
committerFlorin Coras <florin.coras@gmail.com>2017-03-17 15:49:39 +0000
commit4b919a56642ccd0a44920feace872aeb5b7a62cf (patch)
tree17750f4efc80d7863b68f9cd08ab381cd00dd534 /test/test_neighbor.py
parentc60f557590f79b8817382bdd982825b66c4e0a73 (diff)
Attached hosts
allow this config to function: set int ip address loop0 169.254.1.1/32 (the default GW address for attached hosts) set int unnumbered af_packet0 use loop0 ('enable' IP on the host interface) ip route add 192.168.1.1/32 via af_packet0 (where to find the host) repeat for each host and host interface. Inter-host communication is throught the /32 routes. To allow this: 1 - attached host routes have the ATTACHED flag set, so the ARP code accepts then as legitimate sources 2 - unnumbered interfaces inherit the source address from the IP interface Change-Id: Ib66c5f0e848c528f79372813adc3a0c11b50717f Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'test/test_neighbor.py')
-rw-r--r--test/test_neighbor.py176
1 files changed, 165 insertions, 11 deletions
diff --git a/test/test_neighbor.py b/test/test_neighbor.py
index a97a63fc7a6..f2b1cfa47ee 100644
--- a/test/test_neighbor.py
+++ b/test/test_neighbor.py
@@ -44,9 +44,15 @@ class ARPTestCase(VppTestCase):
def tearDown(self):
super(ARPTestCase, self).tearDown()
+ self.pg0.unconfig_ip4()
+ self.pg0.unconfig_ip6()
+
+ self.pg1.unconfig_ip4()
+ self.pg1.unconfig_ip6()
+
+ self.pg3.unconfig_ip4()
+
for i in self.pg_interfaces:
- i.unconfig_ip4()
- i.unconfig_ip6()
i.admin_down()
def verify_arp_req(self, rx, smac, sip, dip):
@@ -115,7 +121,7 @@ class ARPTestCase(VppTestCase):
#
# Generate some hosts on the LAN
#
- self.pg1.generate_remote_hosts(6)
+ self.pg1.generate_remote_hosts(9)
#
# Send IP traffic to one of these unresolved hosts.
@@ -249,6 +255,47 @@ class ARPTestCase(VppTestCase):
self.assertTrue(find_nbr(self,
self.pg1.sw_if_index,
self.pg1._remote_hosts[3].ip4))
+ #
+ # Fire in an ARP request before the interface becomes IP enabled
+ #
+ self.pg2.generate_remote_hosts(4)
+
+ p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
+ ARP(op="who-has",
+ hwsrc=self.pg2.remote_mac,
+ pdst=self.pg1.local_ip4,
+ psrc=self.pg2.remote_hosts[3].ip4))
+ self.send_and_assert_no_replies(self.pg2, p,
+ "interface not IP enabled")
+
+ #
+ # Make pg2 un-numbered to pg1
+ #
+ self.pg2.set_unnumbered(self.pg1.sw_if_index)
+
+ #
+ # We should respond to ARP requests for the unnumbered to address
+ # once an attached route to the source is known
+ #
+ self.send_and_assert_no_replies(
+ self.pg2, p,
+ "ARP req for unnumbered address - no source")
+
+ attached_host = VppIpRoute(self, self.pg2.remote_hosts[3].ip4, 32,
+ [VppRoutePath("0.0.0.0",
+ self.pg2.sw_if_index)])
+ attached_host.add_vpp_config()
+
+ self.pg2.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+ self.verify_arp_resp(rx[0],
+ self.pg2.local_mac,
+ self.pg2.remote_mac,
+ self.pg1.local_ip4,
+ self.pg2.remote_hosts[3].ip4)
#
# A neighbor entry that has no associated FIB-entry
@@ -270,12 +317,8 @@ class ARPTestCase(VppTestCase):
self.pg1._remote_hosts[4].ip4,
32))
#
- # Unnumbered pg2 to pg1
- #
- self.pg2.set_unnumbered(self.pg1.sw_if_index)
-
- #
- # now we can form adjacencies out of pg2 from within pg1's subnet
+ # pg2 is unnumbered to pg1, so we can form adjacencies out of pg2
+ # from within pg1's subnet
#
arp_unnum = VppNeighbor(self,
self.pg2.sw_if_index,
@@ -302,10 +345,100 @@ class ARPTestCase(VppTestCase):
self.pg1._remote_hosts[5].ip4)
#
+ # ARP requests from hosts in pg1's subnet sent on pg2 are replied to
+ # with the unnumbered interface's address as the source
+ #
+ p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
+ ARP(op="who-has",
+ hwsrc=self.pg2.remote_mac,
+ pdst=self.pg1.local_ip4,
+ psrc=self.pg1.remote_hosts[6].ip4))
+
+ self.pg2.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+ self.verify_arp_resp(rx[0],
+ self.pg2.local_mac,
+ self.pg2.remote_mac,
+ self.pg1.local_ip4,
+ self.pg1.remote_hosts[6].ip4)
+
+ #
+ # An attached host route out of pg2 for an undiscovered hosts generates
+ # an ARP request with the unnumbered address as the source
+ #
+ att_unnum = VppIpRoute(self, self.pg1.remote_hosts[7].ip4, 32,
+ [VppRoutePath("0.0.0.0",
+ self.pg2.sw_if_index)])
+ att_unnum.add_vpp_config()
+
+ p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1._remote_hosts[7].ip4) /
+ UDP(sport=1234, dport=1234) /
+ Raw())
+
+ self.pg0.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+
+ self.verify_arp_req(rx[0],
+ self.pg2.local_mac,
+ self.pg1.local_ip4,
+ self.pg1._remote_hosts[7].ip4)
+
+ p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
+ ARP(op="who-has",
+ hwsrc=self.pg2.remote_mac,
+ pdst=self.pg1.local_ip4,
+ psrc=self.pg1.remote_hosts[7].ip4))
+
+ self.pg2.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+ self.verify_arp_resp(rx[0],
+ self.pg2.local_mac,
+ self.pg2.remote_mac,
+ self.pg1.local_ip4,
+ self.pg1.remote_hosts[7].ip4)
+
+ #
+ # An attached host route as yet unresolved out of pg2 for an
+ # undiscovered host, an ARP requests begets a response.
+ #
+ att_unnum1 = VppIpRoute(self, self.pg1.remote_hosts[8].ip4, 32,
+ [VppRoutePath("0.0.0.0",
+ self.pg2.sw_if_index)])
+ att_unnum1.add_vpp_config()
+
+ p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
+ ARP(op="who-has",
+ hwsrc=self.pg2.remote_mac,
+ pdst=self.pg1.local_ip4,
+ psrc=self.pg1.remote_hosts[8].ip4))
+
+ self.pg2.add_stream(p)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(1)
+ self.verify_arp_resp(rx[0],
+ self.pg2.local_mac,
+ self.pg2.remote_mac,
+ self.pg1.local_ip4,
+ self.pg1.remote_hosts[8].ip4)
+
+ #
# ERROR Cases
# 1 - don't respond to ARP request for address not within the
# interface's sub-net
- #
+ # 1a - nor within the unnumbered subnet
p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) /
ARP(op="who-has",
hwsrc=self.pg0.remote_mac,
@@ -313,6 +446,14 @@ class ARPTestCase(VppTestCase):
psrc=self.pg0.remote_ip4))
self.send_and_assert_no_replies(self.pg0, p,
"ARP req for non-local destination")
+ p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
+ ARP(op="who-has",
+ hwsrc=self.pg2.remote_mac,
+ pdst="10.10.10.3",
+ psrc=self.pg1.remote_hosts[7].ip4))
+ self.send_and_assert_no_replies(
+ self.pg0, p,
+ "ARP req for non-local destination - unnum")
#
# 2 - don't respond to ARP request from an address not within the
@@ -325,6 +466,14 @@ class ARPTestCase(VppTestCase):
pdst=self.pg0.local_ip4))
self.send_and_assert_no_replies(self.pg0, p,
"ARP req for non-local source")
+ p = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
+ ARP(op="who-has",
+ hwsrc=self.pg2.remote_mac,
+ psrc="10.10.10.3",
+ pdst=self.pg0.local_ip4))
+ self.send_and_assert_no_replies(
+ self.pg0, p,
+ "ARP req for non-local source - unnum")
#
# 3 - don't respond to ARP request from an address that belongs to
@@ -358,6 +507,10 @@ class ARPTestCase(VppTestCase):
static_arp.remove_vpp_config()
self.pg2.unset_unnumbered(self.pg1.sw_if_index)
+ # need this to flush the adj-fibs
+ self.pg2.unset_unnumbered(self.pg1.sw_if_index)
+ self.pg2.admin_down()
+
def test_proxy_arp(self):
""" Proxy ARP """
@@ -500,7 +653,7 @@ class ARPTestCase(VppTestCase):
#
# clean up on interface 2
#
- self.pg2.set_unnumbered(self.pg1.sw_if_index)
+ self.pg2.unset_unnumbered(self.pg1.sw_if_index)
def test_mpls(self):
""" MPLS """
@@ -560,6 +713,7 @@ class ARPTestCase(VppTestCase):
55,
self.pg0.remote_ip4,
"10.0.0.1")
+ self.pg2.unconfig_ip4()
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)