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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/router/busybox/networking/libiproute/
1/* vi: set sw=4 ts=4: */
2/*
3 * ll_addr.c
4 *
5 *		This program is free software; you can redistribute it and/or
6 *		modify it under the terms of the GNU General Public License
7 *		as published by the Free Software Foundation; either version
8 *		2 of the License, or (at your option) any later version.
9 *
10 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
11 */
12
13#include <net/if_arp.h>
14
15#include "libbb.h"
16#include "rt_names.h"
17#include "utils.h"
18
19
20const char* FAST_FUNC ll_addr_n2a(unsigned char *addr, int alen, int type, char *buf, int blen)
21{
22	int i;
23	int l;
24
25	if (alen == 4
26	 && (type == ARPHRD_TUNNEL || type == ARPHRD_SIT || type == ARPHRD_IPGRE)
27	) {
28		return inet_ntop(AF_INET, addr, buf, blen);
29	}
30	l = 0;
31	for (i = 0; i < alen; i++) {
32		if (i == 0) {
33			snprintf(buf + l, blen, ":%02x"+1, addr[i]);
34			blen -= 2;
35			l += 2;
36		} else {
37			snprintf(buf + l, blen, ":%02x", addr[i]);
38			blen -= 3;
39			l += 3;
40		}
41	}
42	return buf;
43}
44
45int FAST_FUNC ll_addr_a2n(unsigned char *lladdr, int len, char *arg)
46{
47	int i;
48
49	if (strchr(arg, '.')) {
50		inet_prefix pfx;
51		if (get_addr_1(&pfx, arg, AF_INET)) {
52			bb_error_msg("\"%s\" is invalid lladdr", arg);
53			return -1;
54		}
55		if (len < 4) {
56			return -1;
57		}
58		memcpy(lladdr, pfx.data, 4);
59		return 4;
60	}
61
62	for (i = 0; i < len; i++) {
63		int temp;
64		char *cp = strchr(arg, ':');
65		if (cp) {
66			*cp = 0;
67			cp++;
68		}
69		if (sscanf(arg, "%x", &temp) != 1 || (temp < 0 || temp > 255)) {
70			bb_error_msg("\"%s\" is invalid lladdr", arg);
71			return -1;
72		}
73		lladdr[i] = temp;
74		if (!cp) {
75			break;
76		}
77		arg = cp;
78	}
79	return i+1;
80}
81