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/*
* Copyright (c) 2018 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 __MAC_ADDRESS_H__
#define __MAC_ADDRESS_H__
#include <vlib/vlib.h>
typedef struct mac_address_t_
{
union
{
u8 bytes[6];
struct
{
u32 first_4;
u16 last_2;
} __clib_packed u;
};
} mac_address_t;
STATIC_ASSERT ((sizeof (mac_address_t) == 6),
"MAC address must represent the on wire format");
extern const mac_address_t ZERO_MAC_ADDRESS;
always_inline u64
ethernet_mac_address_u64 (const u8 * a)
{
return (((u64) a[0] << (u64) (5 * 8))
| ((u64) a[1] << (u64) (4 * 8))
| ((u64) a[2] << (u64) (3 * 8))
| ((u64) a[3] << (u64) (2 * 8))
| ((u64) a[4] << (u64) (1 * 8)) | ((u64) a[5] << (u64) (0 * 8)));
}
always_inline void
ethernet_mac_address_from_u64 (u64 u, u8 * a)
{
i8 ii;
for (ii = 5; ii >= 0; ii--)
{
a[ii] = u & 0xFF;
u = u >> 8;
}
}
static inline int
ethernet_mac_address_is_multicast_u64 (u64 a)
{
return (a & (1ULL << (5 * 8))) != 0;
}
static inline int
ethernet_mac_address_is_zero (const u8 * mac)
{
return ((*((u32 *) mac) == 0) && (*((u16 *) (mac + 4)) == 0));
}
static inline void
ethernet_mac_address_generate (u8 * mac)
{
u32 rnd = clib_cpu_time_now ();
rnd = random_u32 (&rnd);
memcpy (mac + 2, &rnd, sizeof (rnd));
mac[0] = 2;
mac[1] = 0xfe;
}
static inline int
ethernet_mac_address_equal (const u8 * a, const u8 * b)
{
return ((*((u32 *) a) == (*((u32 *) b))) &&
(*((u16 *) (a + 4)) == (*((u16 *) (b + 4)))));
}
static_always_inline void
mac_address_from_bytes (mac_address_t * mac, const u8 * bytes)
{
/* zero out the last 2 bytes, then copy over only 6 */
clib_memcpy_fast (mac->bytes, bytes, 6);
}
static_always_inline void
mac_address_to_bytes (const mac_address_t * mac, u8 * bytes)
{
/* zero out the last 2 bytes, then copy over only 6 */
clib_memcpy_fast (bytes, mac->bytes, 6);
}
static_always_inline int
mac_address_is_zero (const mac_address_t * mac)
{
return (0 == mac->u.first_4 && 0 == mac->u.last_2);
}
static_always_inline u64
mac_address_as_u64 (const mac_address_t * mac)
{
volatile u64 as_u64 = 0;
clib_memcpy ((void *) &as_u64, mac->bytes, 6);
return as_u64;
}
static_always_inline void
mac_address_from_u64 (mac_address_t * mac, u64 u)
{
clib_memcpy (mac->bytes, &u, 6);
}
static_always_inline void
mac_address_copy (mac_address_t * dst, const mac_address_t * src)
{
mac_address_from_bytes (dst, src->bytes);
}
static_always_inline int
mac_address_cmp (const mac_address_t * a, const mac_address_t * b)
{
return (memcmp (a->bytes, b->bytes, 6));
}
static_always_inline int
mac_address_equal (const mac_address_t * a, const mac_address_t * b)
{
return (a->u.last_2 == b->u.last_2 && a->u.first_4 == b->u.first_4);
}
static_always_inline void
mac_address_set_zero (mac_address_t * mac)
{
mac->u.first_4 = 0;
mac->u.last_2 = 0;
}
static_always_inline int
mac_address_n_bits_set (const mac_address_t * a)
{
return (count_set_bits (mac_address_as_u64 (a)));
}
extern void mac_address_increment (mac_address_t * mac);
extern uword unformat_mac_address_t (unformat_input_t * input,
va_list * args);
extern u8 *format_mac_address_t (u8 * s, va_list * args);
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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