/* net.h */

#define NETSTK          8192            /* Stack size for network setup */
#define NETPRIO         500             /* Network startup priority     */
#define NETBOOTFILE     128             /* Size of the netboot filename */

/* Constants used in the networking code */

#define ETH_ARP     0x0806              /* Ethernet type for ARP        */
#define ETH_IP      0x0800              /* Ethernet type for IP         */
#define ETH_IPv6    0x86DD              /* Ethernet type for IPv6       */

/* Format of an Ethernet packet carrying IPv4 and UDP */

#pragma pack(2)
struct  netpacket       {
        byte    net_ethdst[ETH_ADDR_LEN];/* Ethernet dest. MAC address  */
        byte    net_ethsrc[ETH_ADDR_LEN];/* Ethernet source MAC address */
        uint16  net_ethtype;            /* Ethernet type field          */
        byte    net_ipvh;               /* IP version and hdr length    */
        byte    net_iptos;              /* IP type of service           */
        uint16  net_iplen;              /* IP total packet length       */
        uint16  net_ipid;               /* IP datagram ID               */
        uint16  net_ipfrag;             /* IP flags & fragment offset   */
        byte    net_ipttl;              /* IP time-to-live              */
        byte    net_ipproto;            /* IP protocol (actually type)  */
        uint16  net_ipcksum;            /* IP checksum                  */
        uint32  net_ipsrc;              /* IP source address            */
        uint32  net_ipdst;              /* IP destination address       */
        union {
         struct {
          uint16        net_udpsport;   /* UDP source protocol port     */
          uint16        net_udpdport;   /* UDP destination protocol port*/
          uint16        net_udplen;     /* UDP total length             */
          uint16        net_udpcksum;   /* UDP checksum                 */
          byte          net_udpdata[1500-28];/* UDP payload (1500-above)*/
         };
         struct {
          byte          net_ictype;     /* ICMP message type            */
          byte          net_iccode;     /* ICMP code field (0 for ping) */
          uint16        net_iccksum;    /* ICMP message checksum        */
          uint16        net_icident;    /* ICMP identifier              */
          uint16        net_icseq;      /* ICMP sequence number         */
          byte          net_icdata[1500-28];/* ICMP payload (1500-above)*/
         };
        };
};
#pragma pack()

#define PACKLEN sizeof(struct netpacket)

extern  bpid32  netbufpool;             /* ID of net packet buffer pool */

struct  network {                       /* Network information          */
        uint32  ipucast;                /* Computer's IP unicast address*/
        uint32  ipbcast;                /* IP broadcast address         */
        uint32  ipmask;                 /* IP address mask              */
        uint32  ipprefix;               /* IP (network) prefix          */
        uint32  iprouter;               /* Default router address       */
        uint32  bootserver;             /* Boot server address          */
        uint32  dnsserver;              /* DNS server address           */
        uint32  ntpserver;              /* NTP (time) server address    */
        bool8   ipvalid;                /* Nonzero => above are valid   */
        byte    ethucast[ETH_ADDR_LEN]; /* Ethernet multicast address   */
        byte    ethbcast[ETH_ADDR_LEN]; /* Ethernet broadcast address   */
        char    bootfile[NETBOOTFILE];  /* Name of boot file            */
};

extern  struct  network NetData;        /* Local Network Interface info */