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Diffstat (limited to 'VNFs/DPPD-PROX/gre.h')
| -rw-r--r-- | VNFs/DPPD-PROX/gre.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/gre.h b/VNFs/DPPD-PROX/gre.h new file mode 100644 index 00000000..23f68b62 --- /dev/null +++ b/VNFs/DPPD-PROX/gre.h @@ -0,0 +1,35 @@ +/* +// Copyright (c) 2010-2017 Intel Corporation +// +// 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 _GRE_H_ +#define _GRE_H_ + +#define GRE_CRC_PRESENT 0x10 +#define GRE_ROUTING_PRESENT 0x08 +#define GRE_KEY_PRESENT 0x04 +#define GRE_SEQNUM_PRESENT 0x02 +#define GRE_STRICT_ROUTE 0x01 + +struct gre_hdr { + uint8_t recur: 3; /* recur */ + uint8_t bits: 5; /* bits: Checksum, Routing, Key, Sequence Number, strict Route */ + uint8_t version: 3; /* Version: must be 0 */ + uint8_t flags: 5; /* Flags: must be 0 */ + uint16_t type; /* Protocol type */ + uint32_t gre_id; /* Key ID */ +} __attribute__((__packed__)); + +#endif /* _GRE_H_ */ |