nat: dslite plugin separation

Type: refactor

Signed-off-by: Filip Varga <fivarga@cisco.com>
Change-Id: I81546423200cc7f8a06b527dac8ead191a9e0519

1 files changed, 69 insertions, 0 deletions

diff --git a/src/plugins/nat/lib/inlines.h b/src/plugins/nat/lib/inlines.h
new file mode 100644
index 00000000000..f2bd5e08ce6
--- /dev/null
+++ b/src/plugins/nat/lib/inlines.h
@@ -0,0 +1,69 @@
+/*
+ * 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.
+ */
+/**
+ * @brief The NAT44 inline functions
+ */
+#ifndef included_nat_inlines_h__
+#define included_nat_inlines_h__
+
+static_always_inline u32
+ip_proto_to_nat_proto (u8 ip_proto)
+{
+  u32 nat_proto = ~0;
+
+  nat_proto = (ip_proto == IP_PROTOCOL_UDP) ? NAT_PROTOCOL_UDP : nat_proto;
+  nat_proto = (ip_proto == IP_PROTOCOL_TCP) ? NAT_PROTOCOL_TCP : nat_proto;
+  nat_proto = (ip_proto == IP_PROTOCOL_ICMP) ? NAT_PROTOCOL_ICMP : nat_proto;
+  nat_proto = (ip_proto == IP_PROTOCOL_ICMP6) ? NAT_PROTOCOL_ICMP : nat_proto;
+
+  return nat_proto;
+}
+
+static_always_inline u8
+nat_proto_to_ip_proto (nat_protocol_t nat_proto)
+{
+  u8 ip_proto = ~0;
+
+  ip_proto = (nat_proto == NAT_PROTOCOL_UDP) ? IP_PROTOCOL_UDP : ip_proto;
+  ip_proto = (nat_proto == NAT_PROTOCOL_TCP) ? IP_PROTOCOL_TCP : ip_proto;
+  ip_proto = (nat_proto == NAT_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP : ip_proto;
+
+  return ip_proto;
+}
+
+static_always_inline u8
+icmp_type_is_error_message (u8 icmp_type)
+{
+  switch (icmp_type)
+    {
+    case ICMP4_destination_unreachable:
+    case ICMP4_time_exceeded:
+    case ICMP4_parameter_problem:
+    case ICMP4_source_quench:
+    case ICMP4_redirect:
+    case ICMP4_alternate_host_address:
+      return 1;
+    }
+  return 0;
+}
+
+#endif /* included_nat_inlines_h__ */
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */