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#ifndef __UIP_PBUF_H__
#define __UIP_PBUF_H__
//#include "lwip/opt.h"
//#include "lwip/err.h"
#include "uip-conf.h"
#include "uip_etharp.h"
typedef rt_int16_t s16_t;
typedef rt_int8_t err_t;
#ifdef __cplusplus
extern "C" {
#endif
#define PBUF_TRANSPORT_HLEN 20
#define PBUF_IP_HLEN 20
typedef enum {
PBUF_TRANSPORT,
PBUF_IP,
PBUF_LINK,
PBUF_RAW
} pbuf_layer;
typedef enum {
PBUF_RAM, /* pbuf data is stored in RAM */
PBUF_ROM, /* pbuf data is stored in ROM */
PBUF_REF, /* pbuf comes from the pbuf pool */
PBUF_POOL /* pbuf payload refers to RAM */
} pbuf_type;
/** indicates this packet's data should be immediately passed to the application */
#define PBUF_FLAG_PUSH 0x01U
#ifdef RT_USING_LWIP
struct pbuf {
/** next pbuf in singly linked pbuf chain */
struct pbuf *next;
/** pointer to the actual data in the buffer */
void *payload;
/**
* total length of this buffer and all next buffers in chain
* belonging to the same packet.
*
* For non-queue packet chains this is the invariant:
* p->tot_len == p->len + (p->next? p->next->tot_len: 0)
*/
u16_t tot_len;
/** length of this buffer */
u16_t len;
/** pbuf_type as u8_t instead of enum to save space */
u8_t /*pbuf_type*/ type;
/** misc flags */
u8_t flags;
/**
* the reference count always equals the number of pointers
* that refer to this pbuf. This can be pointers from an application,
* the stack itself, or pbuf->next pointers from a chain.
*/
u16_t ref;
};
#else /* RT_USING_UIP */
struct pbuf
{
/** pointer to the actual data in the buffer */
void *payload;
rt_uint16_t len;
};
#endif
/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_type type);
u8_t pbuf_header(struct pbuf *p, s16_t header_size);
u8_t pbuf_free(struct pbuf *p);
#endif /* __UIP_PBUF_H__ */
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