source: MondoRescue/branches/2.2.9/mindi-busybox/networking/libiproute/ll_addr.c@ 2725

/* vi: set sw=4 ts=4: */
/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 */

#include <net/if_arp.h>

#include "libbb.h"
#include "rt_names.h"
#include "utils.h"


const char* FAST_FUNC ll_addr_n2a(unsigned char *addr, int alen, int type, char *buf, int blen)
{
    int i;
    int l;

    if (alen == 4
     && (type == ARPHRD_TUNNEL || type == ARPHRD_SIT || type == ARPHRD_IPGRE)
    ) {
        return inet_ntop(AF_INET, addr, buf, blen);
    }
    l = 0;
    for (i = 0; i < alen; i++) {
        if (i == 0) {
            snprintf(buf + l, blen, ":%02x"+1, addr[i]);
            blen -= 2;
            l += 2;
        } else {
            snprintf(buf + l, blen, ":%02x", addr[i]);
            blen -= 3;
            l += 3;
        }
    }
    return buf;
}

int FAST_FUNC ll_addr_a2n(unsigned char *lladdr, int len, char *arg)
{
    int i;

    if (strchr(arg, '.')) {
        inet_prefix pfx;
        if (get_addr_1(&pfx, arg, AF_INET)) {
            bb_error_msg("\"%s\" is invalid lladdr", arg);
            return -1;
        }
        if (len < 4) {
            return -1;
        }
        memcpy(lladdr, pfx.data, 4);
        return 4;
    }

    for (i = 0; i < len; i++) {
        int temp;
        char *cp = strchr(arg, ':');
        if (cp) {
            *cp = 0;
            cp++;
        }
        if (sscanf(arg, "%x", &temp) != 1 || (temp < 0 || temp > 255)) {
            bb_error_msg("\"%s\" is invalid lladdr", arg);
            return -1;
        }
        lladdr[i] = temp;
        if (!cp) {
            break;
        }
        arg = cp;
    }
    return i+1;
}