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
11 #include <net/if_arp.h>
12
13 #include "libbb.h"
14 #include "rt_names.h"
15 #include "utils.h"
16
17
ll_addr_n2a(unsigned char * addr,int alen,int type,char * buf,int blen)18 const char* FAST_FUNC ll_addr_n2a(unsigned char *addr, int alen, int type, char *buf, int blen)
19 {
20 int i;
21 int l;
22
23 if (alen == 4
24 && (type == ARPHRD_TUNNEL || type == ARPHRD_SIT || type == ARPHRD_IPGRE)
25 ) {
26 return inet_ntop(AF_INET, addr, buf, blen);
27 }
28 l = 0;
29 for (i = 0; i < alen; i++) {
30 if (i == 0) {
31 snprintf(buf + l, blen, ":%02x"+1, addr[i]);
32 blen -= 2;
33 l += 2;
34 } else {
35 snprintf(buf + l, blen, ":%02x", addr[i]);
36 blen -= 3;
37 l += 3;
38 }
39 }
40 return buf;
41 }
42
ll_addr_a2n(unsigned char * lladdr,int len,char * arg)43 int FAST_FUNC ll_addr_a2n(unsigned char *lladdr, int len, char *arg)
44 {
45 int i;
46
47 if (strchr(arg, '.')) {
48 inet_prefix pfx;
49 if (get_addr_1(&pfx, arg, AF_INET)) {
50 bb_error_msg("\"%s\" is invalid lladdr", arg);
51 return -1;
52 }
53 if (len < 4) {
54 return -1;
55 }
56 memcpy(lladdr, pfx.data, 4);
57 return 4;
58 }
59
60 for (i = 0; i < len; i++) {
61 int temp;
62 char *cp = strchr(arg, ':');
63 if (cp) {
64 *cp = 0;
65 cp++;
66 }
67 if (sscanf(arg, "%x", &temp) != 1 || (temp < 0 || temp > 255)) {
68 bb_error_msg("\"%s\" is invalid lladdr", arg);
69 return -1;
70 }
71 lladdr[i] = temp;
72 if (!cp) {
73 break;
74 }
75 arg = cp;
76 }
77 return i+1;
78 }
79