libdb/uIP/uip_pbuf.h

   1 #ifndef __UIP_PBUF_H__
   2 #define __UIP_PBUF_H__
   3
   4 #include "uip.h"
   5
   6 /* Definitions for the pbuf flag field. These are NOT the flags that
   7  * are passed to pbuf_alloc(). */
   8 #define UIP_PBUF_FLAG_RAM   0x00U    /* Flags that pbuf data is stored in RAM */
   9 #define UIP_PBUF_FLAG_ROM   0x01U    /* Flags that pbuf data is stored in ROM */
  10 #define UIP_PBUF_FLAG_POOL  0x02U    /* Flags that the pbuf comes from the pbuf pool */
  11 #define UIP_PBUF_FLAG_REF   0x04U    /* Flags thet the pbuf payload refers to RAM */
  12
  13 typedef enum {
  14         UIP_PBUF_TRANSPORT,
  15         UIP_PBUF_IP,
  16         UIP_PBUF_LINK,
  17         UIP_PBUF_RAW
  18 } uip_pbuf_layer;
  19
  20 typedef enum {
  21         UIP_PBUF_POOL,
  22         UIP_PBUF_RAM,
  23         UIP_PBUF_ROM,
  24         UIP_PBUF_REF
  25 } uip_pbuf_flag;
  26
  27 struct uip_pbuf {
  28         struct uip_pbuf *next;
  29         void *payload;
  30         u16_t tot_len;
  31         u16_t len;
  32         u16_t flags;
  33         u16_t ref;
  34 };
  35
  36 void uip_pbuf_init();
  37 struct uip_pbuf* uip_pbuf_alloc(uip_pbuf_layer layer,u16_t len,uip_pbuf_flag flag);
  38 u8_t uip_pbuf_free(struct uip_pbuf *p);
  39 void uip_pbuf_realloc(struct uip_pbuf *p,u16_t new_len);
  40 u8_t uip_pbuf_header(struct uip_pbuf *p,s16_t hdr_size_inc);
  41 void uip_pbuf_cat(struct uip_pbuf *h,struct uip_pbuf *t);
  42 u8_t uip_pbuf_clen(struct uip_pbuf *p);
  43 void uip_pbuf_queue(struct uip_pbuf *p,struct uip_pbuf *n);
  44 void uip_pbuf_ref(struct uip_pbuf *p);
  45 void uip_pbuf_chain(struct uip_pbuf *h,struct uip_pbuf *t);
  46 struct uip_pbuf* uip_pbuf_dequeue(struct uip_pbuf *p);
  47 struct uip_pbuf* uip_pbuf_dechain(struct uip_pbuf *p);
  48
  49 #endif