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/*
* BIRD -- The BGP Monitoring Protocol (BMP)
*
* (c) 2020 Akamai Technologies, Inc. (Pawel Maslanka, pmaslank@akamai.com)
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BMP_BUFFER_H_
#define _BIRD_BMP_BUFFER_H_
#include "proto/bmp/bmp.h"
#include <stdlib.h>
#include "lib/resource.h"
buffer
bmp_buffer_alloc(pool *ppool, const size_t n);
void
bmp_buffer_free(buffer *buf);
static inline void
bmp_buffer_flush(buffer *buf)
{
buf->pos = buf->start;
}
static inline size_t
bmp_buffer_size(const buffer *buf)
{
return buf->end - buf->start;
}
static inline size_t
bmp_buffer_avail(const buffer *buf)
{
return buf->end - buf->pos;
}
static inline size_t
bmp_buffer_pos(const buffer *buf)
{
return buf->pos - buf->start;
}
static inline byte *
bmp_buffer_data(const buffer *buf)
{
return buf->start;
}
void
bmp_buffer_need(buffer *buf, const size_t n);
// Idea for following macros has been taken from |proto/mrt/mrt.c|
#define BMP_DEFINE_PUT_FUNC(S, T) \
static inline void \
bmp_put_##S(buffer *b, const T x) \
{ \
bmp_buffer_need(b, sizeof(T)); \
put_##S(b->pos, x); \
b->pos += sizeof(T); \
}
BMP_DEFINE_PUT_FUNC(u8, u8)
BMP_DEFINE_PUT_FUNC(u16, u16)
BMP_DEFINE_PUT_FUNC(u32, u32)
BMP_DEFINE_PUT_FUNC(u64, u64)
BMP_DEFINE_PUT_FUNC(ip4, ip4_addr)
BMP_DEFINE_PUT_FUNC(ip6, ip6_addr)
void
bmp_put_data(buffer *buf, const void *src, const size_t n);
#endif /* _BIRD_BMP_BUFFER_H_ */
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