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diff --git a/hicn-plugin/src/error.h b/hicn-plugin/src/error.h
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+/*
+ * Copyright (c) 2017-2020 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.
+ */
+
+#ifndef __HICN_ERROR_H__
+#define __HICN_ERROR_H__
+
+/**
+ * @file error.h
+ *
+ * Error codes for the hICN plugin.
+ */
+
+
+#define foreach_hicn_error \
+ _(NONE, 0, "Ok") \
+ _(UNSPECIFIED, -128, "Unspecified Error") \
+ _(FACE_NOT_FOUND, -129, "Face not found in Face table") \
+ _(FACE_NULL, -130, "Face null") \
+ _(FACE_IP_ADJ_NOT_FOUND, -131, "Ip adjacecny for face not found") \
+ _(FACE_HW_INT_NOT_FOUND, -132, "Hardware interface not found") \
+ _(FACE_NOMEM, -133, "Face table is full") \
+ _(FACE_NO_GLOBAL_IP, -134, "No global ip address for face") \
+ _(FACE_NOT_FOUND_IN_ENTRY, -135, "Face not found in entry") \
+ _(FACE_ALREADY_DELETED, -136, "Face alredy deleted") \
+ _(FACE_ALREADY_CREATED, -137, "Face alredy created") \
+ _(FWD_NOT_ENABLED, -138, "hICN forwarder not enabled") \
+ _(FWD_ALREADY_ENABLED, -139, "hICN forwarder alredy enabled") \
+ _(PARSER_UNSUPPORTED_PROTO, -140, "Unsupported protocol") \
+ _(PARSER_PKT_INVAL, -141, "Packet null") \
+ _(PIT_CONFIG_MINLT_OOB, -142, "Min lifetime ouf of bounds") \
+ _(PIT_CONFIG_MAXLT_OOB, -143, "Max lifetime ouf of bounds") \
+ _(PIT_CONFIG_MINMAXLT, -144, "Min lifetime grater than max lifetime") \
+ _(PIT_CONFIG_DFTLT_OOB, -145, "Default lifetime ouf of bounds") \
+ _(PIT_CONFIG_SIZE_OOB, -146, "Pit size ouf of bounds") \
+ _(CS_CONFIG_SIZE_OOB, -147, "CS size ouf of bounds") \
+ _(CS_CONFIG_RESERVED_OOB, -148, "Reseved CS must be between 0 and 100 (excluded)") \
+ _(DPO_CTX_NHOPS_NS, -149, "No space for additional next hop") \
+ _(DPO_CTX_NHOPS_EXISTS, -150, "Next hop already in the route") \
+ _(DPO_CTX_NOT_FOUND, -151, "Dpo context not found") \
+ _(DPO_MGR_ID_NOT_VALID, -152, "Dpo id for strategy and context not valid") \
+ _(HASHTB_HASH_NOT_FOUND, -153, "Hash not found in hash table") \
+ _(HASHTB_HASH_INVAL, -154, "Error while calculating the hash") \
+ _(HASHTB_NOMEM, -155, "Unable to allocate new buckets or nodes") \
+ _(HASHTB_INVAL, -156, "Invalid argument") \
+ _(HASHTB_KEY_INVAL, -157, "Invalid hashtb key") \
+ _(HASHTB_EXIST, -158, "Hash already in hashtable") \
+ _(ROUTE_INVAL, -159, "Invalid face id and weight") \
+ _(ROUTE_NO_LD, -160, "Expected load balance dpo") \
+ _(ROUTE_MLT_LD, -161, "Unexpected mulitple buckets in load balance dpo") \
+ _(ROUTE_NO_INSERT, -162, "Unable to insert a new FIB entry") \
+ _(ROUTE_DPO_NO_HICN, -163, "Dpo is not of type hICN") \
+ _(ROUTE_NOT_FOUND, -164, "Route not found in FIB") \
+ _(ROUTE_NOT_UPDATED, -165, "Unable to update route") \
+ _(ROUTE_ALREADY_EXISTS, -166, "Route already in FIB") \
+ _(CLI_INVAL, -167, "Invalid input") \
+ _(IPS_ADDR_TYPE_NONUNIFORM, -168, "Src and dst addr have different ip types") \
+ _(FACE_TYPE_EXISTS, -169, "Face type already registered") \
+ _(NO_BUFFERS, -170, "No vlib_buffer available for packet cloning.") \
+ _(NOT_IMPLEMENTED, -171, "Function not yet implemented") \
+ _(IFACE_IP_ADJ_NOT_FOUND, -172, "IP adjacency on incomplete face not available") \
+ _(APPFACE_ALREADY_ENABLED, -173, "Application face already enabled on interface") \
+ _(APPFACE_FEATURE, -174, "Error while enabling app face feature") \
+ _(APPFACE_NOT_FOUND, -175, "Application face not found") \
+ _(APPFACE_PROD_PREFIX_NULL, -176, "Prefix must not be null for producer face") \
+ _(STRATEGY_NH_NOT_FOUND, -177, "Next hop not found") \
+ _(MW_STRATEGY_SET, -178, "Error while setting weight for next hop") \
+ _(STRATEGY_NOT_FOUND, -179, "Strategy not found") \
+ _(UDP_TUNNEL_NOT_FOUND, -180, "Udp tunnel not found") \
+ _(UDP_TUNNEL_SRC_DST_TYPE, -181, "Src and dst addresses have different type (ipv4 and ipv6)")
+
+typedef enum
+{
+#define _(a,b,c) HICN_ERROR_##a = (b),
+ foreach_hicn_error
+#undef _
+ HICN_N_ERROR,
+} hicn_error_t;
+
+extern const char *HICN_ERROR_STRING[];
+
+#define get_error_string(errno) (char *)(errno ? HICN_ERROR_STRING[(-errno) - 127] : HICN_ERROR_STRING[errno])
+
+#endif /* //__HICN_ERROR_H__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */