mips_sys

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#include "arp.h"
#include "checksum.h"
#include "config.h"
#include "ethernet.h"
#include "icmp.h"
#include "ip.h"
#include "macros.h"
#include "memcpy.h"
#include "nethelp.h"
#include "udp.h"
// timing parameters
#define IP_BUFFER_TICKS_MAX 50 // maximum age of buffered IP packet (in 200ms)
/**
 * buffers for IP packets to transmit
 *  - used if MAC is unknown when packet shall be transmitted
 *  - packet is sent when MAC becomes known
 *  - some buffers with different length (packets have different lengths)
 */
//@{
unsigned int ip_buffer0[20];
unsigned int ip_buffer1[20];
unsigned int ip_buffer2[40];
unsigned int ip_buffer3[80];
//@}
/// table with buffers
struct ip_buffer_table
{
  void *ptr; ///< pointer to buffer for packet
  unsigned int buf_sz; ///< size of buffer
  unsigned int pkg_sz; ///< size of packet in buffer, 0 for packet
  unsigned int ticks; //< age of entry (in 200ms)
} ip_buffer_tab[] =
{ // put smaller buffers in front of larger buffers
  //  - then short packets will use smaller buffers more often
  { ip_buffer0, sizeof(ip_buffer0), 0, 0 },
  { ip_buffer1, sizeof(ip_buffer1), 0, 0 },
  { ip_buffer2, sizeof(ip_buffer2), 0, 0 },
  { ip_buffer3, sizeof(ip_buffer3), 0, 0 },
};
/// initialize
void ip_init(void)
{
  unsigned int i;
  for (i = 0; i < count(ip_buffer_tab ); i++)
    ip_buffer_tab[i].pkg_sz = 0;
}
/// tick procedure - call every 200ms
 
 
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