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aba5acdf SH |
1 | /* |
2 | * ll_addr.c | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <unistd.h> | |
15 | #include <syslog.h> | |
16 | #include <fcntl.h> | |
17 | #include <sys/ioctl.h> | |
18 | #include <sys/socket.h> | |
19 | #include <sys/ioctl.h> | |
aba5acdf SH |
20 | #include <netinet/in.h> |
21 | #include <arpa/inet.h> | |
22 | #include <string.h> | |
23 | ||
ea7436fb SH |
24 | #include <linux/netdevice.h> |
25 | #include <linux/if_arp.h> | |
26 | #include <linux/sockios.h> | |
27 | ||
28 | #include "rt_names.h" | |
aba5acdf SH |
29 | #include "utils.h" |
30 | ||
31 | ||
32 | const char *ll_addr_n2a(unsigned char *addr, int alen, int type, char *buf, int blen) | |
33 | { | |
34 | int i; | |
35 | int l; | |
36 | ||
37 | if (alen == 4 && | |
38 | (type == ARPHRD_TUNNEL || type == ARPHRD_SIT || type == ARPHRD_IPGRE)) { | |
39 | return inet_ntop(AF_INET, addr, buf, blen); | |
40 | } | |
0280ef85 DL |
41 | if (alen == 16 && type == ARPHRD_TUNNEL6) { |
42 | return inet_ntop(AF_INET6, addr, buf, blen); | |
43 | } | |
aba5acdf SH |
44 | l = 0; |
45 | for (i=0; i<alen; i++) { | |
46 | if (i==0) { | |
47 | snprintf(buf+l, blen, "%02x", addr[i]); | |
48 | blen -= 2; | |
49 | l += 2; | |
50 | } else { | |
51 | snprintf(buf+l, blen, ":%02x", addr[i]); | |
52 | blen -= 3; | |
53 | l += 3; | |
54 | } | |
55 | } | |
56 | return buf; | |
57 | } | |
58 | ||
f332d169 SH |
59 | /*NB: lladdr is char * (rather than u8 *) because sa_data is char * (1003.1g) */ |
60 | int ll_addr_a2n(char *lladdr, int len, char *arg) | |
aba5acdf SH |
61 | { |
62 | if (strchr(arg, '.')) { | |
63 | inet_prefix pfx; | |
64 | if (get_addr_1(&pfx, arg, AF_INET)) { | |
65 | fprintf(stderr, "\"%s\" is invalid lladdr.\n", arg); | |
66 | return -1; | |
67 | } | |
68 | if (len < 4) | |
69 | return -1; | |
70 | memcpy(lladdr, pfx.data, 4); | |
71 | return 4; | |
72 | } else { | |
73 | int i; | |
74 | ||
75 | for (i=0; i<len; i++) { | |
76 | int temp; | |
77 | char *cp = strchr(arg, ':'); | |
78 | if (cp) { | |
79 | *cp = 0; | |
80 | cp++; | |
81 | } | |
82 | if (sscanf(arg, "%x", &temp) != 1) { | |
83 | fprintf(stderr, "\"%s\" is invalid lladdr.\n", arg); | |
84 | return -1; | |
85 | } | |
86 | if (temp < 0 || temp > 255) { | |
87 | fprintf(stderr, "\"%s\" is invalid lladdr.\n", arg); | |
88 | return -1; | |
89 | } | |
90 | lladdr[i] = temp; | |
91 | if (!cp) | |
92 | break; | |
93 | arg = cp; | |
94 | } | |
95 | return i+1; | |
96 | } | |
97 | } |