Update.
[glibc.git] / inet / ether_line.c
blob7e871a6bd72e3789f676062ccb04163dd39dfc7e
1 /* Copyright (C) 1996, 1999, 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <ctype.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <netinet/ether.h>
23 #include <netinet/if_ether.h>
26 int
27 ether_line (const char *line, struct ether_addr *addr, char *hostname)
29 size_t cnt;
30 char *cp;
32 for (cnt = 0; cnt < 6; ++cnt)
34 unsigned int number;
35 char ch;
37 ch = _tolower (*line++);
38 if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
39 return -1;
40 number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
42 ch = _tolower (*line);
43 if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch)))
45 ++line;
46 if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
47 return -1;
48 number <<= 4;
49 number += isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
51 ch = *line;
52 if (cnt < 5 && ch != ':')
53 return -1;
56 /* Store result. */
57 addr->ether_addr_octet[cnt] = (unsigned char) number;
59 /* Skip ':'. */
60 if (ch != '\0')
61 ++line;
64 /* Remove trailing white space. */
65 cp = __strchrnul (line, '#');
66 while (cp > line && isspace (cp[-1]))
67 --cp;
69 if (cp == line)
70 /* No hostname. */
71 return -1;
73 /* XXX This can cause trouble because the hostname might be too long
74 but we have no possibility to check it here. */
75 memcpy (hostname, line, cp - line);
76 hostname [cp - line] = '\0';
78 return 0;