/* xsh_arp.c - xsh_arp */

#include 
#include 
#include 

static  void    arp_dmp();
/*------------------------------------------------------------------------
 * xsh_arp - display the current ARP cache for an interface
 *------------------------------------------------------------------------
 */
shellcmd xsh_arp(int nargs, char *args[])
{
        /* For argument '--help', emit help about the 'arp' command     */

        if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
                printf("Use: %s\n\n", args[0]);
                printf("Description:\n");
                printf("\tDisplays information from the ARP cache\n");
                printf("Options:\n");
                printf("\t--help\t display this help and exit\n");
                return 0;
        }

        /* Dump the Entire ARP cache */
        printf("\n");
        arp_dmp();

        return 0;
}


/*------------------------------------------------------------------------
 * arp_dmp - dump the ARP cache
 *------------------------------------------------------------------------
 */
static  void arp_dmp ()
{
        int32   i, j;                   /* Index into the ARP table     */
        struct  arpentry *arptr;        /* Pointer to entry in cache    */

        /* Print entries from the ARP table */

        printf("ARP cache:\n");
        printf("   State Pid    IP Address    Hardware Address\n");
        printf("   ----- --- --------------- -----------------\n");
        for (i = 0; i < ARP_SIZ; i++) {
                arptr = &arpcache[i];
                if (arptr->arstate == AR_FREE) {
                        continue;
                }
                switch(arptr->arstate) {
                    case AR_PENDING:    printf("   PEND "); break;
                    case AR_RESOLVED:   printf("   RESLV"); break;
                    default:            printf("   ?????"); break;
                }
                if (arptr->arstate == AR_PENDING) {
                        printf("%4d ", arptr->arpid);
                } else {
                        printf("     ");
                }
                printf("%3d.", (arptr->arpaddr & 0xFF000000) >> 24);
                printf("%3d.", (arptr->arpaddr & 0x00FF0000) >> 16);
                printf("%3d.", (arptr->arpaddr & 0x0000FF00) >> 8);
                printf("%3d",  (arptr->arpaddr & 0x000000FF));

                printf(" %02X", arptr->arhaddr[0]);
                for (j = 1; j < ARP_HALEN; j++) {
                        printf(":%02X", arptr->arhaddr[j]);
                }
                printf("\n");
        }
        printf("\n");
        return;
}