Build a generic helper library

1 files changed, 109 insertions, 0 deletions

diff --git a/common/oui.c b/common/oui.c
new file mode 100644
index 00000000..cc695a90
--- /dev/null
+++ b/common/oui.c
@@ -0,0 +1,109 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2004-2006  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <malloc.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "oui.h"
+
+/* http://standards.ieee.org/regauth/oui/oui.txt */
+
+#define OUIFILE "/var/lib/misc/oui.txt"
+
+char *ouitocomp(const char *oui)
+{
+	struct stat st;
+	char *str, *map, *off, *end;
+	int fd;
+
+	fd = open("oui.txt", O_RDONLY);
+	if (fd < 0) {
+		fd = open(OUIFILE, O_RDONLY);
+		if (fd < 0) {
+			fd = open("/usr/share/misc/oui.txt", O_RDONLY);
+			if (fd < 0)
+				return NULL;
+		}
+	}
+
+	if (fstat(fd, &st) < 0) {
+		close(fd);
+		return NULL;
+	}
+
+	str = malloc(128);
+	if (!str) {
+		close(fd);
+		return NULL;
+	}
+
+	memset(str, 0, 128);
+
+	map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+	if (!map || map == MAP_FAILED) {
+		free(str);
+		close(fd);
+		return NULL;
+	}
+
+	off = strstr(map, oui);
+	if (off) {
+		off += 18;
+		end = strpbrk(off, "\r\n");
+		strncpy(str, off, end - off);
+	} else {
+		free(str);
+		str = NULL;
+	}
+
+	munmap(map, st.st_size);
+
+	close(fd);
+
+	return str;
+}
+
+int oui2comp(const char *oui, char *comp, size_t size)
+{
+	char *tmp;
+
+	tmp = ouitocomp(oui);
+	if (!tmp)
+		return -1;
+
+	snprintf(comp, size, "%s", tmp);
+
+	free(tmp);
+
+	return 0;
+}