/* ip.h  -  Constants related to Internet Protocol version 4 (IPv4) */

#define IP_BCAST        0xffffffff      /* IP local broadcast address   */
#define IP_THIS         0xffffffff      /* "this host" src IP address   */
#define IP_ALLZEROS     0x00000000      /* The all-zeros IP address     */

#define IP_ICMP         1               /* ICMP protocol type for IP    */
#define IP_UDP          17              /* UDP protocol type for IP     */

#define IP_ASIZE        4               /* Bytes in an IP address       */
#define IP_HDR_LEN      20              /* Bytes in an IP header        */
#define IP_VH           0x45            /* IP version and hdr length    */

#define IP_OQSIZ        8               /* Size of IP output queue      */

/* Queue of outgoing IP packets waiting for ipout process */

struct  iqentry {
        int32   iqhead;                 /* Index of next packet to send */
        int32   iqtail;                 /* Index of next free slot      */
        sid32   iqsem;                  /* Semaphore that counts pkts   */
        struct  netpacket *iqbuf[IP_OQSIZ];/* Circular packet queue     */
};

extern  struct  iqentry ipoqueue;       /* Network output queue         */