networking/libiproute/ll_addr.c

/* vi: set sw=4 ts=4: */
/*
 * ll_addr.c
 *
 *		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 "libbb.h"

#include <string.h>
#include <net/if_arp.h>

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


const char *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 ll_addr_a2n(unsigned char *lladdr, int len, char *arg)
{
	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;
	} else {
		int i;

		for (i=0; i<len; i++) {
			int temp;
			char *cp = strchr(arg, ':');
			if (cp) {
				*cp = 0;
				cp++;
			}
			if (sscanf(arg, "%x", &temp) != 1) {
				bb_error_msg("\"%s\" is invalid lladdr", arg);
				return -1;
			}
			if (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;
	}
}
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 "libbb.h"
14
15	#include <string.h>
16	#include <net/if_arp.h>
17
18	#include "rt_names.h"
19	#include "utils.h"
20
21
22	const char ll_addr_n2a(unsigned char addr, int alen, int type, char *buf, int blen)
23	{
24	int i;
25	int l;
26
27	if (alen == 4 &&
28	(type == ARPHRD_TUNNEL \|\| type == ARPHRD_SIT \|\| type == ARPHRD_IPGRE)) {
29	return inet_ntop(AF_INET, addr, buf, blen);
30	}
31	l = 0;
32	for (i=0; i<alen; i++) {
33	if (i==0) {
34	snprintf(buf+l, blen, ":%02x"+1, addr[i]);
35	blen -= 2;
36	l += 2;
37	} else {
38	snprintf(buf+l, blen, ":%02x", addr[i]);
39	blen -= 3;
40	l += 3;
41	}
42	}
43	return buf;
44	}
45
46	int ll_addr_a2n(unsigned char lladdr, int len, char arg)
47	{
48	if (strchr(arg, '.')) {
49	inet_prefix pfx;
50	if (get_addr_1(&pfx, arg, AF_INET)) {
51	bb_error_msg("\"%s\" is invalid lladdr", arg);
52	return -1;
53	}
54	if (len < 4) {
55	return -1;
56	}
57	memcpy(lladdr, pfx.data, 4);
58	return 4;
59	} else {
60	int i;
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) {
70	bb_error_msg("\"%s\" is invalid lladdr", arg);
71	return -1;
72	}
73	if (temp < 0 \|\| temp > 255) {
74	bb_error_msg("\"%s\" is invalid lladdr", arg);
75	return -1;
76	}
77	lladdr[i] = temp;
78	if (!cp) {
79	break;
80	}
81	arg = cp;
82	}
83	return i+1;
84	}
85	}