lib/util: Move mac_buf from nc code to util library

[petitboot] / lib / util / util.c

diff --git a/lib/util/util.c b/lib/util/util.c
new file mode 100644 (file)
index 0000000..75b1c23
--- /dev/null
+++ b/lib/util/util.c
@@ -0,0 +1,46 @@
+/*
+ *  Copyright (C) 2013 IBM Corporation
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include <util/util.h>
+
+void mac_str(uint8_t *mac, unsigned int maclen, char *buf, unsigned int buflen)
+{
+       unsigned int i;
+       char *pos;
+
+       assert(buflen > sizeof("unknown"));
+
+       if (!maclen || maclen * 3 + 1 > buflen) {
+               strcpy(buf, "unknown");
+               return;
+       }
+
+       pos = buf;
+
+       for (i = 0; i < maclen; i++) {
+               snprintf(pos, 4, "%02x:", mac[i]);
+               pos += 3;
+       }
+
+       *(pos - 1) = '\0';
+
+       return;
+}