xsh_netinfo.c

Go to the documentation of this file.

/* xsh_netinfo.c - xsh_netinfo */

#include <xinu.h>
#include <string.h>
#include <stdio.h>

/*------------------------------------------------------------------------
 * xsh_netinfo - obtain and print the IP address, subnet mask, default
 *          router address and other network information
 *------------------------------------------------------------------------
 */
shellcmd xsh_netinfo(int nargs, char *args[]) {

    uint32  ipaddr;         /* An IP address in binary  */
    uint32  ipbcast;        /* IP broadcast addr. in binary */
    uint32  ipprefix;       /* IP network prefix in binary  */
    uint32  router;         /* Router address in binary */
    uint32  tserver;        /* NTP server address in binary */
    uint32  dserver;        /* DNS server address in binary */
    char    str[40];        /* Temporary used for formatting*/
    uint32  ipmask;         /* Subnet mask in binary    */

    /* Output info for '--help' argument */

    if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
        printf("Usage: %s\n\n", args[0]);
        printf("Description:\n");
        printf("\tDisplays IP address information\n");
        printf("Options:\n");
        printf("\t-f\tforce a new DHCP request\n");
        printf("\t--help\tdisplay this help and exit\n");
        return OK;
    }

    /* Check argument count */

    if (nargs > 2) {
        fprintf(stderr, "%s: too many arguments\n", args[0]);
        fprintf(stderr, "Try '%s --help' for more information\n",
            args[0]);
        return SYSERR;
    }

    if (nargs == 2) {
        if (strncmp(args[1], "-f", 3) != 0) {
            fprintf(stderr, "%s: invalid argument\n", args[0]);
            fprintf(stderr,
                "Try '%s --help' for more information\n",
                args[0]);
            return 1;
        }
        NetData.ipvalid = FALSE;
        getlocalip();
    }


    /* IP unicast address in dotted decimal and hex */

    ipaddr = NetData.ipucast;
    sprintf(str, "%d.%d.%d.%d",
        (ipaddr>>24)&0xff, (ipaddr>>16)&0xff,
        (ipaddr>>8)&0xff,        ipaddr&0xff);
    printf("   %-16s  %-16s  0x%08x\n",
        "IP address:", str, ipaddr);

    /* IP network broadcast address in dotted decimal & hex */

    ipbcast = NetData.ipbcast;
    sprintf(str, "%d.%d.%d.%d",
        (ipbcast>>24)&0xff, (ipbcast>>16)&0xff,
        (ipbcast>>8)&0xff,        ipbcast&0xff);
    printf("   %-16s  %-16s  0x%08x\n",
        "IP broadcast:", str, ipbcast);

    /* IP network prefix in dotted decimal & hex */

    ipprefix = NetData.ipprefix;
    sprintf(str, "%d.%d.%d.%d",
        (ipprefix>>24)&0xff, (ipprefix>>16)&0xff,
        (ipprefix>>8)&0xff,        ipprefix&0xff);
    printf("   %-16s  %-16s  0x%08x\n",
        "IP prefix:", str, ipprefix);

    /* IP network mask in dotted decimal & hex */

    ipmask = NetData.ipmask;
    ipaddr = NetData.ipucast;
    sprintf(str, "%d.%d.%d.%d",
        (ipmask>>24)&0xff, (ipmask>>16)&0xff,
        (ipmask>>8)&0xff,        ipmask&0xff);
    printf("   %-16s  %-16s  0x%08x\n",
        "Address mask:", str, ipmask);

    /* Default router in dotted decimal & hex */

    router = NetData.iprouter;
    sprintf(str, "%d.%d.%d.%d",
        (router>>24)&0xff, (router>>16)&0xff,
        (router>>8)&0xff,        router&0xff);
    printf("   %-16s  %-16s  0x%08x\n",
        "IP router:", str, router);

    /* NTP time server in dotted decimal & hex */

    tserver = NetData.ntpserver;
    if (tserver != 0) {
        sprintf(str, "%d.%d.%d.%d",
            (tserver>>24)&0xff, (tserver>>16)&0xff,
            (tserver>>8)&0xff,        tserver&0xff);
        printf("   %-16s  %-16s  0x%08x\n",
            "NTP time server:", str, tserver);
    }

    /* DNS server in dotted decimal & hex */

    dserver = NetData.dnsserver;
    if (dserver != 0) {
        sprintf(str, "%d.%d.%d.%d",
            (dserver>>24)&0xff, (dserver>>16)&0xff,
            (dserver>>8)&0xff,        dserver&0xff);
        printf("   %-16s  %-16s  0x%08x\n",
            "DNS server:", str, dserver);
    }

    printf("   %-16s  %02x:%02x:%02x:%02x:%02x:%02x\n",
    "MAC unicast:",
    0xff & NetData.ethucast[0],
    0xff & NetData.ethucast[1],
    0xff & NetData.ethucast[2],
    0xff & NetData.ethucast[3],
    0xff & NetData.ethucast[4],
    0xff & NetData.ethucast[5]);

    printf("   %-16s  %02x:%02x:%02x:%02x:%02x:%02x\n",
    "MAC broadcast:",
    0xff & NetData.ethbcast[0],
    0xff & NetData.ethbcast[1],
    0xff & NetData.ethbcast[2],
    0xff & NetData.ethbcast[3],
    0xff & NetData.ethbcast[4],
    0xff & NetData.ethbcast[5]);

    return OK;
}