fw/ethernet.h (00d70be) - mips_sys · BlinkenArea

ethernet.h

#ifndef ETHERNET_H
#define ETHERNET_H

/** padding at end of packet
    to reach next size divisible by 4 and at least 60 bytes */
#define ETHERNET_PADDING_SIZE(packet) \
        (sizeof(struct packet) >= 60 ? 0 : 60 - sizeof(struct packet))
#define ETHERNET_PADDING(packet) \
        unsigned char padding[ETHERNET_PADDING_SIZE(packet)]
#define ETHERNET_PAD(packet) \
        struct packet ## _pad \
        { \
          struct packet p; \
          ETHERNET_PADDING(packet); \
        } __attribute__((packed))

/// header of ethernet packet
struct ethernet_header
{
  unsigned char dest[6];
  unsigned char src[6];
  unsigned short type;
} __attribute__((packed));

/// ethernet packet
struct ethernet_packet
{
  struct ethernet_header eth_hdr;
} __attribute__((packed));

/// ethernet packet with padding
ETHERNET_PAD(ethernet_packet);

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

/**
 * @brief send an ethernet packet
 * @param[in] ptr pointer to data of packet
 * @param[in] sz size of packet
 *
 * ptr must point to a ethernet_packet of sufficient size (ethernet padding)
 * with eth_hdr.dest and eth_hdr.type already initialized
 */
void ethernet_send(void *ptr, unsigned int sz);

#endif // #ifdef ETHERNET_H

mips_sys

implemented IP + ICMP, fixed ARP (padding overwriting stack)