fw/ip.h (2a4b80d) - mips_sys · BlinkenArea

ip.h

#ifndef IP_H
#define IP_H

#include "ethernet.h"

/// header of IP packet
struct ip_header
{
  unsigned char ver__hdr_len;
  unsigned char tos;
  unsigned short total_len;
  unsigned short id;
  unsigned short frag_ofs;
  unsigned char ttl;
  unsigned char proto;
  unsigned short hdr_chk;
  unsigned char src[4];
  unsigned char dest[4];
} __attribute__((packed));

/// IP packet
struct ip_packet
{
  struct ethernet_header eth_hdr;
  struct ip_header ip_hdr;
} __attribute__((packed));

/// initialize
void ip_init(void);

/// tick procedure - call every 200ms
void ip_tick200(void);

/**
 * @brief process a received IP packet
 * @param[in] ptr pointer to data of packet
 * @param[in] sz size of packet
 */
void ip_recv(void *ptr, unsigned int sz);

/**
 * @brief send an IP packet
 * @param[in] ptr pointer to data of packet
 * @param[in] sz size of packet
 *
 * ptr must point to a ip_packet
 * with ip_hdr.proto and ip_hdr.dest already initialized
 */
void ip_send(void *ptr, unsigned int sz);

/**
 * @brief a MAC address was discovered
 * @param[in] ip the IP address the MAC was discovered for
 * @param[in] mac the MAC address corresponding to the IP address
 *
 * called by ARP to notify IP
 */
void ip_got_mac(unsigned char ip[4], unsigned char mac[6]);

#endif // #ifdef IP_H

mips_sys

handle padding to minimum ethernet frame size (TX) in HW