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diff --git a/src/vnet/ip/format.h b/src/vnet/ip/format.h
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+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * ip/format.h: ip 4 and/or 6 formatting
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_ip_format_h
+#define included_ip_format_h
+
+/* IP4 or IP6. */
+
+format_function_t format_ip_protocol;
+unformat_function_t unformat_ip_protocol;
+
+format_function_t format_tcp_udp_port;
+unformat_function_t unformat_tcp_udp_port;
+
+typedef enum format_ip_adjacency_flags_t_
+{
+  FORMAT_IP_ADJACENCY_NONE,
+  FORMAT_IP_ADJACENCY_BRIEF = FORMAT_IP_ADJACENCY_NONE,
+  FORMAT_IP_ADJACENCY_DETAIL = (1 << 0),
+} format_ip_adjacency_flags_t;
+
+format_function_t format_ip_adjacency;
+format_function_t format_ip_adjacency_packet_data;
+
+format_function_t format_ip46_address;
+
+typedef enum
+{
+  IP46_TYPE_ANY,
+  IP46_TYPE_IP4,
+  IP46_TYPE_IP6
+} ip46_type_t;
+/* unformat_ip46_address expects arguments (ip46_address_t *, ip46_type_t)
+ * The type argument is used to enforce a particular IP version. */
+unformat_function_t unformat_ip46_address;
+
+/* IP4 */
+
+/* Parse an IP4 address %d.%d.%d.%d. */
+unformat_function_t unformat_ip4_address;
+
+/* Format an IP4 address. */
+format_function_t format_ip4_address;
+format_function_t format_ip4_address_and_length;
+
+/* Parse an IP4 header. */
+unformat_function_t unformat_ip4_header;
+
+/* Format an IP4 header. */
+format_function_t format_ip4_header;
+
+/* Parse an IP packet matching pattern. */
+unformat_function_t unformat_ip4_match;
+
+unformat_function_t unformat_pg_ip4_header;
+
+/* IP6 */
+unformat_function_t unformat_ip6_address;
+format_function_t format_ip6_address;
+format_function_t format_ip6_address_and_length;
+unformat_function_t unformat_ip6_header;
+format_function_t format_ip6_header;
+unformat_function_t unformat_pg_ip6_header;
+
+/* Format a TCP/UDP headers. */
+format_function_t format_tcp_header, format_udp_header;
+
+unformat_function_t unformat_pg_tcp_header, unformat_pg_udp_header;
+
+#endif /* included_ip_format_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */