Re-initialize hostapd/wpa_supplicant git repository based on 0.6.3 release

src/utils/wpabuf.c

@@ -0,0 +1,125 @@
+/*
+ * Dynamic data buffer
+ * Copyright (c) 2007, Jouni Malinen <j@w1.fi>
+ *
+ * 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 "wpabuf.h"
+
+static void wpabuf_overflow(const struct wpabuf *buf, size_t len)
+{
+	wpa_printf(MSG_ERROR, "wpabuf %p (size=%lu used=%lu) overflow len=%lu",
+		   buf, (unsigned long) buf->size, (unsigned long) buf->used,
+		   (unsigned long) len);
+	abort();
+}
+
+
+int wpabuf_resize(struct wpabuf **_buf, size_t add_len)
+{
+	struct wpabuf *buf = *_buf;
+	if (buf->used + add_len > buf->size) {
+		unsigned char *nbuf;
+		if (buf->ext_data) {
+			nbuf = os_realloc(buf->ext_data, buf->used + add_len);
+			if (nbuf == NULL)
+				return -1;
+			os_memset(nbuf + buf->used, 0, add_len);
+			buf->ext_data = nbuf;
+		} else {
+			nbuf = os_realloc(buf, sizeof(struct wpabuf) +
+					  buf->used + add_len);
+			if (nbuf == NULL)
+				return -1;
+			buf = (struct wpabuf *) nbuf;
+			os_memset(nbuf + sizeof(struct wpabuf) + buf->used, 0,
+				  add_len);
+			*_buf = buf;
+		}
+		buf->size = buf->used + add_len;
+	}
+
+	return 0;
+}
+
+
+/**
+ * wpabuf_alloc - Allocate a wpabuf of the given size
+ * @len: Length for the allocated buffer
+ * Returns: Buffer to the allocated wpabuf or %NULL on failure
+ */
+struct wpabuf * wpabuf_alloc(size_t len)
+{
+	struct wpabuf *buf = os_zalloc(sizeof(struct wpabuf) + len);
+	if (buf == NULL)
+		return NULL;
+	buf->size = len;
+	return buf;
+}
+
+
+struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len)
+{
+	struct wpabuf *buf = os_zalloc(sizeof(struct wpabuf));
+	if (buf == NULL)
+		return NULL;
+
+	buf->size = len;
+	buf->used = len;
+	buf->ext_data = data;
+
+	return buf;
+}
+
+
+struct wpabuf * wpabuf_alloc_copy(const void *data, size_t len)
+{
+	struct wpabuf *buf = wpabuf_alloc(len);
+	if (buf)
+		wpabuf_put_data(buf, data, len);
+	return buf;
+}
+
+
+struct wpabuf * wpabuf_dup(const struct wpabuf *src)
+{
+	struct wpabuf *buf = wpabuf_alloc(wpabuf_len(src));
+	if (buf)
+		wpabuf_put_data(buf, wpabuf_head(src), wpabuf_len(src));
+	return buf;
+}
+
+
+/**
+ * wpabuf_free - Free a wpabuf
+ * @buf: wpabuf buffer
+ */
+void wpabuf_free(struct wpabuf *buf)
+{
+	if (buf == NULL)
+		return;
+	os_free(buf->ext_data);
+	os_free(buf);
+}
+
+
+void * wpabuf_put(struct wpabuf *buf, size_t len)
+{
+	void *tmp = wpabuf_mhead_u8(buf) + wpabuf_len(buf);
+	buf->used += len;
+	if (buf->used > buf->size) {
+		wpabuf_overflow(buf, len);
+	}
+	return tmp;
+}