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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.
*/
/*
* ethernet/packet.h: ethernet packet format.
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef included_ethernet_packet_h
#define included_ethernet_packet_h
#include <vnet/interface.h>
typedef enum
{
#define ethernet_type(n,s) ETHERNET_TYPE_##s = n,
#include <vnet/ethernet/types.def>
#undef ethernet_type
} ethernet_type_t;
typedef struct
{
/* Source/destination address. */
u8 dst_address[6];
u8 src_address[6];
/* Ethernet type. */
u16 type;
} ethernet_header_t;
#define ETHERNET_ADDRESS_UNICAST 0
#define ETHERNET_ADDRESS_MULTICAST 1
/* I/G bit: individual (unicast)/group (broadcast/multicast). */
always_inline uword
ethernet_address_cast (u8 * a)
{
return (a[0] >> 0) & 1;
}
always_inline int
ethernet_address_is_broadcast (u8 * a)
{
return clib_mem_unaligned (a, u32) == 0xffffffff &&
clib_mem_unaligned (a + 4, u16) == 0xffff;
}
always_inline uword
ethernet_address_is_locally_administered (u8 * a)
{
return (a[0] >> 1) & 1;
}
always_inline void
ethernet_address_set_locally_administered (u8 * a)
{
a[0] |= 1 << 1;
}
always_inline int
eh_dst_addr_to_rx_ctype (ethernet_header_t * eh)
{
if (PREDICT_TRUE (ethernet_address_cast (eh->dst_address) ==
ETHERNET_ADDRESS_UNICAST))
{
return VNET_INTERFACE_COUNTER_RX_UNICAST;
}
else if (ethernet_address_is_broadcast (eh->dst_address))
{
return VNET_INTERFACE_COUNTER_RX_BROADCAST;
}
else
{
return VNET_INTERFACE_COUNTER_RX_MULTICAST;
}
}
always_inline int
eh_dst_addr_to_tx_ctype (ethernet_header_t * eh)
{
if (PREDICT_TRUE (ethernet_address_cast (eh->dst_address) ==
ETHERNET_ADDRESS_UNICAST))
{
return VNET_INTERFACE_COUNTER_TX_UNICAST;
}
else if (ethernet_address_is_broadcast (eh->dst_address))
{
return VNET_INTERFACE_COUNTER_TX_BROADCAST;
}
else
{
return VNET_INTERFACE_COUNTER_TX_MULTICAST;
}
}
/* For VLAN ethernet type. */
typedef struct
{
/* 3 bit priority, 1 bit CFI and 12 bit vlan id. */
u16 priority_cfi_and_id;
#define ETHERNET_N_VLAN (1 << 12)
/* Inner ethernet type. */
u16 type;
} ethernet_vlan_header_t;
always_inline void
ethernet_vlan_header_set_priority_net_order (ethernet_vlan_header_t * h,
u8 prio)
{
u8 *bytes = (u8 *) (&h->priority_cfi_and_id);
bytes[0] &= 0x0f;
bytes[0] |= (prio & 0xf) << 4;
}
always_inline u8
ethernet_vlan_header_get_priority_net_order (ethernet_vlan_header_t * h)
{
u8 *bytes = (u8 *) (&h->priority_cfi_and_id);
return (bytes[0] >> 4);
}
/* VLAN with ethertype first and vlan id second */
typedef struct
{
/* vlan type */
u16 type;
/* 3 bit priority, 1 bit CFI and 12 bit vlan id. */
u16 priority_cfi_and_id;
} ethernet_vlan_header_tv_t;
/* PBB header with B-TAG - backbone VLAN indicator and I-TAG - service encapsulation */
typedef struct
{
/* Backbone source/destination address. */
u8 b_dst_address[6];
u8 b_src_address[6];
/* B-tag */
u16 b_type;
/* 3 bit priority, 1 bit DEI and 12 bit vlan id */
u16 priority_dei_id;
/* I-tag */
u16 i_type;
/* 3 bit priority, 1 bit DEI, 1 bit UCA, 3 bit RES and 24 bit I_SID (service identifier) */
u32 priority_dei_uca_res_sid;
#define ETHERNET_N_PBB (1 << 24)
} ethernet_pbb_header_t;
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct
{
/* Backbone source/destination address. */
u8 b_dst_address[6];
u8 b_src_address[6];
/* B-tag */
u16 b_type;
/* 3 bit priority, 1 bit DEI and 12 bit vlan id */
u16 priority_dei_id;
/* I-tag */
u16 i_type;
/* 3 bit priority, 1 bit DEI, 1 bit UCA, 3 bit RES and 24 bit I_SID (service identifier) */
u32 priority_dei_uca_res_sid;
}) ethernet_pbb_header_packed_t;
/* *INDENT-ON* */
#endif /* included_ethernet_packet_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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