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authorNick Zavaritsky <nick.zavaritsky@emnify.com>2020-02-27 15:54:58 +0000
committerJohn Lo <loj@cisco.com>2020-03-03 16:15:15 +0000
commit27518c2ffd0ef75e973a64870da0e3339f39ccce (patch)
tree3fb7afdb06963ae3ef36cc74bfe33e10b8668d5d /src/vnet/ip/vtep.c
parent297d288ed653abac9d719013c4ead5215230e7da (diff)
geneve gtpu vxlan vxlan-gpe: VRF-aware bypass node
Bypass node MUST NOT intercept a packet if destination IP doesn’t match a local address. However IP address interpretation depends on the VRF, hence bypass node must take that into account. This patch also factors-out common VTEP management and checking code. Type: improvement Signed-off-by: Nick Zavaritsky <nick.zavaritsky@emnify.com> Change-Id: I5665d94882bbf45d15f8da140c7ada528ec7fa94
Diffstat (limited to 'src/vnet/ip/vtep.c')
-rw-r--r--src/vnet/ip/vtep.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/vnet/ip/vtep.c b/src/vnet/ip/vtep.c
new file mode 100644
index 00000000000..d0493f8cd2f
--- /dev/null
+++ b/src/vnet/ip/vtep.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/ip/vtep.h>
+
+uword
+vtep_addr_ref (vtep_table_t * t, u32 fib_index, ip46_address_t * ip)
+{
+ vtep4_key_t key4 = {.addr = ip->ip4,.fib_index = fib_index };
+ vtep6_key_t key6 = {.addr = ip->ip6,.fib_index = fib_index };
+ uword *vtep = ip46_address_is_ip4 (ip) ?
+ hash_get (t->vtep4, key4.as_u64) : hash_get_mem (t->vtep6, &key6);
+ if (vtep)
+ return ++(*vtep);
+ ip46_address_is_ip4 (ip) ?
+ hash_set (t->vtep4, key4.as_u64, 1) :
+ hash_set_mem_alloc (&t->vtep6, &key6, 1);
+ return 1;
+}
+
+uword
+vtep_addr_unref (vtep_table_t * t, u32 fib_index, ip46_address_t * ip)
+{
+ vtep4_key_t key4 = {.addr = ip->ip4,.fib_index = fib_index };
+ vtep6_key_t key6 = {.addr = ip->ip6,.fib_index = fib_index };
+ uword *vtep = ip46_address_is_ip4 (ip) ?
+ hash_get (t->vtep4, key4.as_u64) : hash_get_mem (t->vtep6, &key6);
+ ALWAYS_ASSERT (vtep);
+ if (--(*vtep) != 0)
+ return *vtep;
+ ip46_address_is_ip4 (ip) ?
+ hash_unset (t->vtep4, key4.as_u64) :
+ hash_unset_mem_free (&t->vtep6, &key6);
+ return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */