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-rw-r--r--inet/ether_aton_r.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/inet/ether_aton_r.c b/inet/ether_aton_r.c
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+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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 <ctype.h>
+#include <stdlib.h>
+#include <netinet/ether.h>
+#include <netinet/if_ether.h>
+
+
+struct ether_addr *
+ether_aton_r (const char *asc, struct ether_addr *addr)
+{
+ size_t cnt;
+
+ for (cnt = 0; cnt < 6; ++cnt)
+ {
+ unsigned int number;
+ char ch;
+
+ ch = tolower (*asc++);
+ if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
+ return NULL;
+ number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
+
+ ch = tolower (*asc);
+ if ((cnt < 5 && ch != ':') || (cnt == 5 && ch != '\0' && !isspace (ch)))
+ {
+ ++asc;
+ if ((ch < '0' || ch > '9') && (ch < 'a' || ch > 'f'))
+ return NULL;
+ number <<= 4;
+ number = isdigit (ch) ? (ch - '0') : (ch - 'a' + 10);
+
+ ch = *asc;
+ if (cnt < 5 && ch != ':')
+ return NULL;
+ }
+
+ /* Store result. */
+ addr->ether_addr_octet[cnt] = (unsigned char) number;
+
+ /* Skip ':'. */
+ ++asc;
+ }
+
+ return addr;
+}