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