File content as of revision 2:540f6e142d59:

/*********************************************************************
PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
See LICENSE and COPYING for usage.

*********************************************************************/
#ifndef _INCLUDE_PICO_FRAME
#define _INCLUDE_PICO_FRAME
#include "pico_config.h"


#define PICO_FRAME_FLAG_BCAST   (0x01)
#define PICO_FRAME_FLAG_SACKED  (0x80)
#define IS_BCAST(f) ((f->flags & PICO_FRAME_FLAG_BCAST) == PICO_FRAME_FLAG_BCAST)


struct pico_socket;


struct pico_frame {

  /* Connector for queues */
  struct pico_frame *next;

  /* Start of the whole buffer, total frame length. */
  unsigned char *buffer;
  uint32_t      buffer_len;

  /* For outgoing packets: this is the meaningful buffer. */
  unsigned char *start;
  uint32_t      len;

  /* Pointer to usage counter */
  uint32_t *usage_count;

  /* Pointer to protocol headers */
  uint8_t *datalink_hdr;

  uint8_t *net_hdr;
  int net_len;
  uint8_t *transport_hdr;
  int transport_len;
  uint8_t *app_hdr;
  int app_len;

  /* Pointer to the phisical device this packet belongs to.
   * Should be valid in both routing directions
   */
  struct pico_device *dev;

  unsigned long timestamp;

  /* Failures due to bad datalink addressing. */
  uint16_t failure_count;

  /* Protocol over IP */
  uint8_t  proto;

  /* PICO_FRAME_FLAG_* */
  uint8_t flags;

  /* Pointer to payload */
  unsigned char *payload;
  int payload_len;

#ifdef PICO_SUPPORT_IPFRAG
  /* Payload fragmentation info (big endian)*/
  uint16_t frag;
#endif

  /* Pointer to socket */
  struct pico_socket *sock;

  /* Pointer to transport info, used to store remote UDP duple (IP + port) */
  void *info;

  /*Priority. "best-effort" priority, the default value is 0. Priority can be in between -10 and +10*/
  int8_t priority;
};

/** frame alloc/dealloc/copy **/
void pico_frame_discard(struct pico_frame *f);
struct pico_frame *pico_frame_copy(struct pico_frame *f);
struct pico_frame *pico_frame_deepcopy(struct pico_frame *f);
struct pico_frame *pico_frame_alloc(int size);
uint16_t pico_checksum(void *inbuf, int len);
uint16_t pico_dualbuffer_checksum(void *b1, int len1, void *b2, int len2);

static inline int pico_is_digit(char c)
{
  if (c < '0' || c > '9')
    return 0;
  return 1;
}

#endif