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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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