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diff --git a/src/vnet/ip/icmp4.h b/src/vnet/ip/icmp4.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.
+ */
+#ifndef included_vnet_icmp4_h
+#define included_vnet_icmp4_h
+
+#define foreach_icmp4_error \
+ _ (NONE, "valid packets") \
+ _ (UNKNOWN_TYPE, "unknown type") \
+ _ (INVALID_CODE_FOR_TYPE, "invalid code for type") \
+ _ (INVALID_HOP_LIMIT_FOR_TYPE, "hop_limit != 255") \
+ _ (LENGTH_TOO_SMALL_FOR_TYPE, "payload length too small for type") \
+ _ (OPTIONS_WITH_ODD_LENGTH, \
+ "total option length not multiple of 8 bytes") \
+ _ (OPTION_WITH_ZERO_LENGTH, "option has zero length") \
+ _ (ECHO_REPLIES_SENT, "echo replies sent") \
+ _ (DST_LOOKUP_MISS, "icmp6 dst address lookup misses") \
+ _ (DEST_UNREACH_SENT, "destination unreachable response sent") \
+ _ (TTL_EXPIRE_SENT, "hop limit exceeded response sent") \
+ _ (PARAM_PROBLEM_SENT, "parameter problem response sent") \
+ _ (DROP, "error message dropped")
+
+typedef enum
+{
+#define _(f,s) ICMP4_ERROR_##f,
+ foreach_icmp4_error
+#undef _
+} icmp4_error_t;
+
+typedef struct
+{
+ u8 packet_data[64];
+} icmp_input_trace_t;
+
+format_function_t format_icmp4_input_trace;
+void ip4_icmp_register_type (vlib_main_t * vm, icmp4_type_t type,
+ u32 node_index);
+void icmp4_error_set_vnet_buffer (vlib_buffer_t * b, u8 type, u8 code,
+ u32 data);
+
+#endif /* included_vnet_icmp4_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */