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authorKlement Sekera <ksekera@cisco.com>2021-05-26 13:02:35 +0200
committerKlement Sekera <ksekera@cisco.com>2021-10-14 14:12:26 +0200
commitff334db797c9cede308367ef1c27bd8dfce0baf4 (patch)
tree1c3cf1db09b25f6a4f0c01a3ad369abe66a8bd1f /src/plugins/nat/lib/nat_proto.h
parent4450b03ba2a69a9e8194c7054dac2c8c19d372cd (diff)
nat: static mappings in flow hash
Put static mappings in flow hash, drop existing hash tables used for static mappings. Drop refcount variables and use hash table as a single point of truth. Allow creating a static mapping conflicting with dynamic mapping, which will take precedence after dynamic mapping is freed, so that the existing flow can finish transferring data. Type: fix Signed-off-by: Klement Sekera <ksekera@cisco.com> Change-Id: Idfde8efabc09971be38921d4b0ca5ccf4e9fe412
Diffstat (limited to 'src/plugins/nat/lib/nat_proto.h')
-rw-r--r--src/plugins/nat/lib/nat_proto.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/plugins/nat/lib/nat_proto.h b/src/plugins/nat/lib/nat_proto.h
new file mode 100644
index 00000000000..9b20d9a71d1
--- /dev/null
+++ b/src/plugins/nat/lib/nat_proto.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2021 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.
+ */
+#ifndef included_nat_proto_h__
+#define included_nat_proto_h__
+
+#include <vnet/ip/ip.h>
+
+#define foreach_nat_protocol \
+ _ (OTHER, 0, other, "other") \
+ _ (UDP, 1, udp, "udp") \
+ _ (TCP, 2, tcp, "tcp") \
+ _ (ICMP, 3, icmp, "icmp")
+
+typedef enum
+{
+#define _(N, i, n, s) NAT_PROTOCOL_##N = i,
+ foreach_nat_protocol
+#undef _
+} nat_protocol_t;
+
+always_inline nat_protocol_t
+ip_proto_to_nat_proto (ip_protocol_t ip_proto)
+{
+ static const nat_protocol_t lookup_table[256] = {
+ [IP_PROTOCOL_TCP] = NAT_PROTOCOL_TCP,
+ [IP_PROTOCOL_UDP] = NAT_PROTOCOL_UDP,
+ [IP_PROTOCOL_ICMP] = NAT_PROTOCOL_ICMP,
+ [IP_PROTOCOL_ICMP6] = NAT_PROTOCOL_ICMP,
+ };
+
+ return lookup_table[ip_proto];
+}
+
+static_always_inline ip_protocol_t
+nat_proto_to_ip_proto (nat_protocol_t nat_proto)
+{
+ ASSERT (nat_proto <= NAT_PROTOCOL_ICMP);
+
+ static const u8 lookup_table[256] = {
+ [NAT_PROTOCOL_OTHER] = ~0,
+ [NAT_PROTOCOL_TCP] = IP_PROTOCOL_TCP,
+ [NAT_PROTOCOL_UDP] = IP_PROTOCOL_UDP,
+ [NAT_PROTOCOL_ICMP] = IP_PROTOCOL_ICMP,
+ };
+
+ ASSERT (NAT_PROTOCOL_OTHER == nat_proto || NAT_PROTOCOL_TCP == nat_proto ||
+ NAT_PROTOCOL_UDP == nat_proto || NAT_PROTOCOL_ICMP == nat_proto);
+
+ return lookup_table[nat_proto];
+}
+
+u8 *format_nat_protocol (u8 *s, va_list *args);
+
+uword unformat_nat_protocol (unformat_input_t *input, va_list *args);
+
+#endif /* included_nat_proto_h__ */
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */