Archipelago » qemu

#define ETH_ALEN 6

#define ETH_HLEN 14

#define ETH_P_IP  0x0800        /* Internet Protocol packet  */

#define ETH_P_ARP 0x0806        /* Address Resolution packet */

#define ARPOP_REQUEST 1         /* ARP request */

#define ARPOP_REPLY   2         /* ARP reply   */

struct ethhdr {

    unsigned char  h_dest[ETH_ALEN];   /* destination eth addr */

    unsigned char  h_source[ETH_ALEN]; /* source ether addr    */

    unsigned short h_proto;            /* packet type ID field */

};

struct arphdr {

    unsigned short ar_hrd;      /* format of hardware address */

    unsigned short ar_pro;      /* format of protocol address */

    unsigned char  ar_hln;      /* length of hardware address */

    unsigned char  ar_pln;      /* length of protocol address */

    unsigned short ar_op;       /* ARP opcode (command)       */

    /*

     *  Ethernet looks like this : This bit is variable sized however...

     */

    unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */

    uint32_t      ar_sip;           /* sender IP address       */

    unsigned char ar_tha[ETH_ALEN]; /* target hardware address */

    uint32_t      ar_tip;           /* target IP address       */

} __attribute__((packed));

#define ARP_TABLE_SIZE 16

typedef struct ArpTable {

    struct arphdr table[ARP_TABLE_SIZE];

    int next_victim;

} ArpTable;

void arp_table_add(Slirp *slirp, int ip_addr, uint8_t ethaddr[ETH_ALEN]);

bool arp_table_search(Slirp *slirp, int in_ip_addr,

                      uint8_t out_ethaddr[ETH_ALEN]);

    ArpTable arp_table;