mips_sys

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#ifndef UDP_H
#define UDP_H
#include "ethernet.h"
#include "ip.h"
/// header of UDP packet
struct udp_header
{
  unsigned short src_port;
  unsigned short dest_port;
  unsigned short length;
  unsigned short chk;
} __attribute__((packed));
/// UDP packet
struct udp_packet
{
  struct ethernet_header eth_hdr;
  struct ip_header ip_hdr;
  struct udp_header udp_hdr;
} __attribute__((packed));
/// tick procedure - call every 200ms
void udp_tick200(void);
/**
 * @brief process a received UDP packet
 * @param[in] ptr pointer to data of packet
 * @param[in] sz size of packet
 */
void udp_recv(void *ptr, unsigned int sz);
/**
 * @brief send a UDP packet
 * @param[in] ptr pointer to data of packet
 * @param[in] sz size of packet
 *
 * ptr must point to a udp_packet
 * with ip_hdr.proto and udp_hdr.src_port, udp_hdr.dest_port, ip_hdr.dest
 * already initialized
 */
void udp_send(void *ptr, unsigned int sz);
#endif // #ifdef UDP_H
 
 
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