1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdlib.h>
#include <netinet/ether.h>
#include <netinet/if_ether.h>
int
ether_line (const char *line, struct ether_addr *addr, char *hostname)
{
size_t cnt;
char *cp;
for (cnt = 0; cnt < 6; ++cnt)
{
unsigned int number;
char ch;
ch = tolower (*line++);
if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
return -1;
number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
ch = tolower (*line);
if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch)))
{
++line;
if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
return -1;
number <<= 4;
number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
ch = *line;
if (cnt < 5 && ch != ':')
return -1;
}
/* Store result. */
addr->ether_addr_octet[cnt] = (unsigned char) number;
/* Skip ':'. */
if (ch != '\0')
++line;
}
/* Remove trailing white space. */
cp = strchr (line, '#');
if (cp == NULL)
cp = strchr (line, '\0');
while (cp > line && isspace (cp[-1]))
--cp;
*cp = '\0';
if (*line == '\0')
/* No hostname. */
return -1;
/* XXX This can cause trouble because the hostname might be too long
but we have no possibility to check it here. */
strcpy (hostname, line);
return 0;
}
|
