[PATCH 05/15] vendor_quirks: initial skeleton

[James Prestwood <prestwoj@gmail.com>]

This module will provide a database for known issues or quirks with
wireless vendors. For now the list of quirks is limited to 32 as
that is the size returned in the bit mask. This could be extended
to 64 in the future if needed, but of course the goal is to never
reach that level.

The vendor_quirks() API is intended to be called from scan.c when
parsing vendor attributes. This will lookup any quirks associated
with the OUI provided and a mask of quirks will be returned. This
can be repeated against all the vendor OUI's seen in the scan. The
result is then a bitmask containing all quirks for that BSS. This
can then be referenced later during various operations in IWD.
---
 Makefile.am         |  2 ++
 src/vendor_quirks.c | 53 +++++++++++++++++++++++++++++++++++++++++++++
 src/vendor_quirks.h | 25 +++++++++++++++++++++
 3 files changed, 80 insertions(+)
 create mode 100644 src/vendor_quirks.c
 create mode 100644 src/vendor_quirks.h

diff --git a/Makefile.am b/Makefile.am
index 92adfa6e..c01cd4c4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -274,6 +274,8 @@ src_iwd_SOURCES = src/main.c linux/nl80211.h src/iwd.h \
 					src/dpp.c \
 					src/udev.c \
 					src/pmksa.h src/pmksa.c \
+					src/vendor_quirks.h \
+					src/vendor_quirks.c \
 					$(eap_sources) \
 					$(builtin_sources)
 
diff --git a/src/vendor_quirks.c b/src/vendor_quirks.c
new file mode 100644
index 00000000..ccfcb444
--- /dev/null
+++ b/src/vendor_quirks.c
@@ -0,0 +1,53 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2025  Locus Robotics Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; 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 <string.h>
+
+#include <ell/ell.h>
+
+#include "src/vendor_quirks.h"
+
+static const struct {
+	uint8_t oui[3];
+	uint32_t quirks;
+} quirk_db[] = {
+	{ }
+};
+
+uint32_t vendor_quirks(const uint8_t *oui)
+{
+	size_t i;
+	uint32_t ret = 0;
+
+	for (i = 0; i < L_ARRAY_SIZE(quirk_db); i++) {
+		if (memcmp(quirk_db[i].oui, oui, 3))
+			continue;
+
+		ret |= quirk_db[i].quirks;
+	}
+
+	return ret;
+}
diff --git a/src/vendor_quirks.h b/src/vendor_quirks.h
new file mode 100644
index 00000000..758073b3
--- /dev/null
+++ b/src/vendor_quirks.h
@@ -0,0 +1,25 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2025  Locus Robotics Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <stdint.h>
+
+uint32_t vendor_quirks(const uint8_t *oui);
-- 
2.34.1