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/*
* Copyright (c) 2019 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 __IP_FLOW_HASH_H__
#define __IP_FLOW_HASH_H__
#include <vnet/ip/ip_types.h>
/** Default: 5-tuple + flowlabel without the "reverse" bit */
#define IP_FLOW_HASH_DEFAULT (0x9F)
#define foreach_flow_hash_bit_v1 \
_ (src, IP_FLOW_HASH_SRC_ADDR) \
_ (dst, IP_FLOW_HASH_DST_ADDR) \
_ (sport, IP_FLOW_HASH_SRC_PORT) \
_ (dport, IP_FLOW_HASH_DST_PORT) \
_ (proto, IP_FLOW_HASH_PROTO) \
_ (reverse, IP_FLOW_HASH_REVERSE_SRC_DST) \
_ (symmetric, IP_FLOW_HASH_SYMMETRIC)
#define foreach_flow_hash_bit \
_ (src, 0, IP_FLOW_HASH_SRC_ADDR) \
_ (dst, 1, IP_FLOW_HASH_DST_ADDR) \
_ (sport, 2, IP_FLOW_HASH_SRC_PORT) \
_ (dport, 3, IP_FLOW_HASH_DST_PORT) \
_ (proto, 4, IP_FLOW_HASH_PROTO) \
_ (reverse, 5, IP_FLOW_HASH_REVERSE_SRC_DST) \
_ (symmetric, 6, IP_FLOW_HASH_SYMMETRIC) \
_ (flowlabel, 7, IP_FLOW_HASH_FL) \
_ (gtpv1teid, 8, IP_FLOW_HASH_GTPV1_TEID)
typedef struct
{
u8 ver_flags;
u8 type;
u16 length;
u32 teid;
} __attribute__ ((packed)) gtpv1u_header_t;
#define GTPV1_PORT_BE 0x6808
/**
* A flow hash configuration is a mask of the flow hash options
*/
typedef enum flow_hash_config_t_
{
#define _(a, b, c) c = (1 << b),
foreach_flow_hash_bit
#undef _
} flow_hash_config_t;
/* Router ID mixed into the flow hash to prevent network polarisation */
extern u32 ip_flow_hash_router_id;
int ip_flow_hash_set (ip_address_family_t af, u32 table_id,
flow_hash_config_t flow_hash_config);
void ip_flow_hash_router_id_set (u32 router_id);
#endif /* __IP_TYPES_H__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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