/*
* Copyright (c) 2016 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_handoff_h
#define included_vnet_handoff_h
#include <vlib/vlib.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/mpls/packet.h>
static inline u64
ipv4_get_key (ip4_header_t * ip)
{
u64 hash_key;
hash_key = *((u64 *) (&ip->address_pair)) ^ ip->protocol;
return hash_key;
}
static inline u64
ipv6_get_key (ip6_header_t * ip)
{
u64 hash_key;
hash_key = ip->src_address.as_u64[0] ^
rotate_left (ip->src_address.as_u64[1], 13) ^
rotate_left (ip->dst_address.as_u64[0], 26) ^
rotate_left (ip->dst_address.as_u64[1], 39) ^ ip->protocol;
return hash_key;
}
#define MPLS_BOTTOM_OF_STACK_BIT_MASK 0x00000100U
#define MPLS_LABEL_MASK 0xFFFFF000U
static inline u64
mpls_get_key (mpls_unicast_header_t * m)
{
u64 hash_key;
u8 ip_ver;
/* find the bottom of the MPLS label stack. */
if (PREDICT_TRUE (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK)))
{
goto bottom_lbl_found;
}
m++;
if (PREDICT_TRUE (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK)))
{
goto bottom_lbl_found;
}
m++;
if (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK))
{
goto bottom_lbl_found;
}
m++;
if (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK))
{
goto bottom_lbl_found;
}
m++;
if (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK))
{
goto bottom_lbl_found;
}
/* the bottom label was not found - use the last label */
hash_key = m->label_exp_s_ttl & clib_net_to_host_u32 (MPLS_LABEL_MASK);
return hash_key;
bottom_lbl_found:
m++;
ip_ver = (*((u8 *) m) >> 4);
/* find out if it is IPV4 or IPV6 header */
if (PREDICT_TRUE (ip_ver == 4))
{
hash_key = ipv4_get_key ((ip4_header_t *) m);
}
else if (PREDICT_TRUE (ip_ver == 6))
{
hash_key = ipv6_get_key ((ip6_header_t *) m);
}
else
{
/* use the bottom label */
hash_key =
(m - 1)->label_exp_s_ttl & clib_net_to_host_u32 (MPLS_LABEL_MASK);
}
return hash_key;
}
static inline u64
eth_get_sym_key (ethernet_header_t * h0)
{
u64 hash_key;
if (PREDICT_TRUE (h0->type) == clib_host_to_net_u16 (ETHERNET_TYPE_IP4))
{
ip4_header_t *ip = (ip4_header_t *) (h0 + 1);
hash_key =
(u64) (ip->src_address.as_u32 ^
ip->dst_address.as_u32 ^ ip->protocol);
}
else if (h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6))
{
ip6_header_t *ip = (ip6_header_t *) (h0 + 1);
hash_key = (u64) (ip->src_address.as_u64[0] ^
ip->src_address.as_u64[1] ^
ip->dst_address.as_u64[0] ^
ip->dst_address.as_u64[1] ^ ip->protocol);
}
else if (h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS))
{
hash_key = mpls_get_key ((mpls_unicast_header_t *) (h0 + 1));
}
else
if (PREDICT_FALSE
((h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_VLAN))
|| (h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD))))
{
ethernet_vlan_header_t *outer = (ethernet_vlan_header_t *) (h0 + 1);
outer = (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_VLAN)) ?
outer + 1 : outer;
if (PREDICT_TRUE (outer->type) ==
clib_host_to_net_u16 (ETHERNET_TYPE_IP4))
{
ip4_header_t *ip = (ip4_header_t *) (outer + 1);
hash_key =
(u64) (ip->src_address.as_u32 ^
ip->dst_address.as_u32 ^ ip->protocol);
}
else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6))
{
ip6_header_t *ip = (ip6_header_t *) (outer + 1);
hash_key =
(u64) (ip->src_address.as_u64[0] ^ ip->src_address.as_u64[1] ^
ip->dst_address.as_u64[0] ^
ip->dst_address.as_u64[1] ^ ip->protocol);
}
else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS))
{
hash_key = mpls_get_key ((mpls_unicast_header_t *) (outer + 1));
}
else
{
hash_key = outer->type;
}
}
else
{
hash_key = 0;
}
return hash_key;
}
static inline u64
eth_get_key (ethernet_header_t * h0)
{
u64 hash_key;
if (PREDICT_TRUE (h0->type) == clib_host_to_net_u16 (ETHERNET_TYPE_IP4))
{
hash_key = ipv4_get_key ((ip4_header_t *) (h0 + 1));
}
else if (h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6))
{
hash_key = ipv6_get_key ((ip6_header_t *) (h0 + 1));
}
else if (h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS))
{
hash_key = mpls_get_key ((mpls_unicast_header_t *) (h0 + 1));
}
else if ((h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_VLAN)) ||
(h0->type == clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD)))
{
ethernet_vlan_header_t *outer = (ethernet_vlan_header_t *) (h0 + 1);
outer = (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_VLAN)) ?
outer + 1 : outer;
if (PREDICT_TRUE (outer->type) ==
clib_host_to_net_u16 (ETHERNET_TYPE_IP4))
{
hash_key = ipv4_get_key ((ip4_header_t *) (outer + 1));
}
else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6))
{
hash_key = ipv6_get_key ((ip6_header_t *) (outer + 1));
}
else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS))
{
hash_key = mpls_get_key ((mpls_unicast_header_t *) (outer + 1));
}
else
{
hash_key = outer->type;
}
}
else
{
hash_key = 0;
}
return hash_key;
}
#endif /* included_vnet_handoff_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
