wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/wps/ndef.c b/src/wps/ndef.c
new file mode 100644
index 0000000..9baec7f
--- /dev/null
+++ b/src/wps/ndef.c
@@ -0,0 +1,175 @@
+/*
+ * NDEF(NFC Data Exchange Format) routines for Wi-Fi Protected Setup
+ * Reference is "NFCForum-TS-NDEF_1.0 2006-07-24".
+ * Copyright (c) 2009, Masashi Honma <honma@ictec.co.jp>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+#include "common.h"
+#include "wps/wps.h"
+#include "wps/wps_i.h"
+
+#define FLAG_MESSAGE_BEGIN (1 << 7)
+#define FLAG_MESSAGE_END (1 << 6)
+#define FLAG_CHUNK (1 << 5)
+#define FLAG_SHORT_RECORD (1 << 4)
+#define FLAG_ID_LENGTH_PRESENT (1 << 3)
+#define FLAG_TNF_RFC2046 (0x02)
+
+struct ndef_record {
+ u8 *type;
+ u8 *id;
+ u8 *payload;
+ u8 type_length;
+ u8 id_length;
+ u32 payload_length;
+ u32 total_length;
+};
+
+static char wifi_handover_type[] = "application/vnd.wfa.wsc";
+
+static int ndef_parse_record(u8 *data, u32 size, struct ndef_record *record)
+{
+ u8 *pos = data + 1;
+
+ if (size < 2)
+ return -1;
+ record->type_length = *pos++;
+ if (data[0] & FLAG_SHORT_RECORD) {
+ if (size < 3)
+ return -1;
+ record->payload_length = *pos++;
+ } else {
+ if (size < 6)
+ return -1;
+ record->payload_length = ntohl(*(u32 *)pos);
+ pos += sizeof(u32);
+ }
+
+ if (data[0] & FLAG_ID_LENGTH_PRESENT) {
+ if ((int) size < pos - data + 1)
+ return -1;
+ record->id_length = *pos++;
+ } else
+ record->id_length = 0;
+
+ record->type = record->type_length == 0 ? NULL : pos;
+ pos += record->type_length;
+
+ record->id = record->id_length == 0 ? NULL : pos;
+ pos += record->id_length;
+
+ record->payload = record->payload_length == 0 ? NULL : pos;
+ pos += record->payload_length;
+
+ record->total_length = pos - data;
+ if (record->total_length > size)
+ return -1;
+ return 0;
+}
+
+
+static struct wpabuf * ndef_parse_records(struct wpabuf *buf,
+ int (*filter)(struct ndef_record *))
+{
+ struct ndef_record record;
+ int len = wpabuf_len(buf);
+ u8 *data = wpabuf_mhead(buf);
+
+ while (len > 0) {
+ if (ndef_parse_record(data, len, &record) < 0) {
+ wpa_printf(MSG_ERROR, "NDEF : Failed to parse");
+ return NULL;
+ }
+ if (filter == NULL || filter(&record))
+ return wpabuf_alloc_copy(record.payload,
+ record.payload_length);
+ data += record.total_length;
+ len -= record.total_length;
+ }
+ wpa_printf(MSG_ERROR, "NDEF : Record not found");
+ return NULL;
+}
+
+
+static struct wpabuf * ndef_build_record(u8 flags, void *type,
+ u8 type_length, void *id,
+ u8 id_length, void *payload,
+ u32 payload_length)
+{
+ struct wpabuf *record;
+ size_t total_len;
+ int short_record;
+ u8 local_flag;
+
+ short_record = payload_length < 256 ? 1 : 0;
+
+ total_len = 2; /* flag + type length */
+ /* payload length */
+ total_len += short_record ? sizeof(u8) : sizeof(u32);
+ if (id_length > 0)
+ total_len += 1;
+ total_len += type_length + id_length + payload_length;
+ record = wpabuf_alloc(total_len);
+ if (record == NULL) {
+ wpa_printf(MSG_ERROR, "NDEF : Failed to allocate "
+ "record for build");
+ return NULL;
+ }
+
+ local_flag = flags;
+ if (id_length > 0)
+ local_flag |= FLAG_ID_LENGTH_PRESENT;
+ if (short_record)
+ local_flag |= FLAG_SHORT_RECORD;
+ wpabuf_put_u8(record, local_flag);
+
+ wpabuf_put_u8(record, type_length);
+
+ if (short_record)
+ wpabuf_put_u8(record, payload_length);
+ else
+ wpabuf_put_be32(record, payload_length);
+
+ if (id_length > 0)
+ wpabuf_put_u8(record, id_length);
+ wpabuf_put_data(record, type, type_length);
+ wpabuf_put_data(record, id, id_length);
+ wpabuf_put_data(record, payload, payload_length);
+ return record;
+}
+
+
+static int wifi_filter(struct ndef_record *record)
+{
+ if (record->type_length != os_strlen(wifi_handover_type))
+ return 0;
+ if (os_memcmp(record->type, wifi_handover_type,
+ os_strlen(wifi_handover_type)) != 0)
+ return 0;
+ return 1;
+}
+
+
+struct wpabuf * ndef_parse_wifi(struct wpabuf *buf)
+{
+ return ndef_parse_records(buf, wifi_filter);
+}
+
+
+struct wpabuf * ndef_build_wifi(struct wpabuf *buf)
+{
+ return ndef_build_record(FLAG_MESSAGE_BEGIN | FLAG_MESSAGE_END |
+ FLAG_TNF_RFC2046, wifi_handover_type,
+ os_strlen(wifi_handover_type), NULL, 0,
+ wpabuf_mhead(buf), wpabuf_len(buf));
+}