hexdump.c

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/* hexdump.c - hexdump */

#include <xinu.h>

/*------------------------------------------------------------------------
 * hexdump - dump an Ethernet/IP/UDP packet in hexadecimal
 *------------------------------------------------------------------------
 */
void    hexdump (
      char *p, int32 len        /* ptr to packet and length of  */
                    /*  payload (IP datagram)   */
    )
{
    int32   i;          /* counts bytes         */
    int32   word;           /* counts 32 bits words     */

    for (i=0; i<6; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<6; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("\t\tEnd Ethernet header\n");

    for (word=0,i=0; i<len; i++) {
        if ((i % 4) == 0) {
            word++;
            if (word == 6) {
                kprintf("\tHV TOS LENGTH    ID FRAG    TTL PRO CKSUM    IP_SRC IP_DST\n");
            } else if (word==8) {
                kprintf("\t\t\t\tSRC_PRT DEST-PORT    LENGTH CKSUM\n");
                word = 17;
            } else if ((word % 16) ==0) {
                kprintf("\n");
            } else if (i != 0) {
                kprintf(" ");
            }
        }
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("\n");
    return;
}
/*------------------------------------------------------------------------
 * hexadump - dump an Ethernet/ARP packet in hexadecimal
 *------------------------------------------------------------------------
 */
void    hexadump    (
      char *p, int32 len        /* ptr to packet and length of  */
                    /*  payload (IP datagram)   */
    )
{
    int32   i;          /* counts bytes         */

    for (i=0; i<6; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<6; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("\t\tEnd Ethernet header\n");

    
    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");
    kprintf("%02x  ", 0xff & *p++);
    kprintf("%02x   ", 0xff & *p++);

    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    kprintf("\tHTYP PTYP HLEN PLEN OP\n");



    for (i=0; i<6; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<6; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("  ");

    for (i=0; i<2; i++) {
        kprintf("%02x", 0xff & *p++);
    }
    kprintf("\tSHA   SPA  THA  TPA\n");
    return;
}