X-Git-Url: http://www.project-moonshot.org/gitweb/?p=mech_eap.git;a=blobdiff_plain;f=libeap%2Fsrc%2Futils%2Fwpabuf.c;fp=libeap%2Fsrc%2Futils%2Fwpabuf.c;h=96cb25cc1764b5be4095067b88a90eea9eada1d4;hp=eda779eaff4fd2c7711782e649caafc7e6f9f839;hb=f3746d009c6d7f50025af1f58a85e5fee9680be6;hpb=244f18d04aaf29e68495b5ffeb40ef5cca50942f

diff --git a/libeap/src/utils/wpabuf.c b/libeap/src/utils/wpabuf.c
index eda779e..96cb25c 100644
--- a/libeap/src/utils/wpabuf.c
+++ b/libeap/src/utils/wpabuf.c
@@ -1,15 +1,9 @@
 /*
  * Dynamic data buffer
- * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2007-2012, 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
  */
 
 #include "includes.h"
@@ -23,7 +17,7 @@
 
 struct wpabuf_trace {
 	unsigned int magic;
-};
+} __attribute__((aligned(8)));
 
 static struct wpabuf_trace * wpabuf_get_trace(const struct wpabuf *buf)
 {
@@ -74,12 +68,12 @@ int wpabuf_resize(struct wpabuf **_buf, size_t add_len)
 
 	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 (buf->flags & WPABUF_FLAG_EXT_DATA) {
+			nbuf = os_realloc(buf->buf, buf->used + add_len);
 			if (nbuf == NULL)
 				return -1;
 			os_memset(nbuf + buf->used, 0, add_len);
-			buf->ext_data = nbuf;
+			buf->buf = nbuf;
 		} else {
 #ifdef WPA_TRACE
 			nbuf = os_realloc(trace, sizeof(struct wpabuf_trace) +
@@ -101,6 +95,7 @@ int wpabuf_resize(struct wpabuf **_buf, size_t add_len)
 			os_memset(nbuf + sizeof(struct wpabuf) + buf->used, 0,
 				  add_len);
 #endif /* WPA_TRACE */
+			buf->buf = (u8 *) (buf + 1);
 			*_buf = buf;
 		}
 		buf->size = buf->used + add_len;
@@ -132,6 +127,7 @@ struct wpabuf * wpabuf_alloc(size_t len)
 #endif /* WPA_TRACE */
 
 	buf->size = len;
+	buf->buf = (u8 *) (buf + 1);
 	return buf;
 }
 
@@ -154,7 +150,8 @@ struct wpabuf * wpabuf_alloc_ext_data(u8 *data, size_t len)
 
 	buf->size = len;
 	buf->used = len;
-	buf->ext_data = data;
+	buf->buf = data;
+	buf->flags |= WPABUF_FLAG_EXT_DATA;
 
 	return buf;
 }
@@ -195,17 +192,28 @@ void wpabuf_free(struct wpabuf *buf)
 		wpa_trace_show("wpabuf_free magic mismatch");
 		abort();
 	}
-	os_free(buf->ext_data);
+	if (buf->flags & WPABUF_FLAG_EXT_DATA)
+		os_free(buf->buf);
 	os_free(trace);
 #else /* WPA_TRACE */
 	if (buf == NULL)
 		return;
-	os_free(buf->ext_data);
+	if (buf->flags & WPABUF_FLAG_EXT_DATA)
+		os_free(buf->buf);
 	os_free(buf);
 #endif /* WPA_TRACE */
 }
 
 
+void wpabuf_clear_free(struct wpabuf *buf)
+{
+	if (buf) {
+		os_memset(wpabuf_mhead(buf), 0, wpabuf_len(buf));
+		wpabuf_free(buf);
+	}
+}
+
+
 void * wpabuf_put(struct wpabuf *buf, size_t len)
 {
 	void *tmp = wpabuf_mhead_u8(buf) + wpabuf_len(buf);
@@ -302,3 +310,33 @@ void wpabuf_printf(struct wpabuf *buf, char *fmt, ...)
 		wpabuf_overflow(buf, res);
 	buf->used += res;
 }
+
+
+/**
+ * wpabuf_parse_bin - Parse a null terminated string of binary data to a wpabuf
+ * @buf: Buffer with null terminated string (hexdump) of binary data
+ * Returns: wpabuf or %NULL on failure
+ *
+ * The string len must be a multiple of two and contain only hexadecimal digits.
+ */
+struct wpabuf * wpabuf_parse_bin(const char *buf)
+{
+	size_t len;
+	struct wpabuf *ret;
+
+	len = os_strlen(buf);
+	if (len & 0x01)
+		return NULL;
+	len /= 2;
+
+	ret = wpabuf_alloc(len);
+	if (ret == NULL)
+		return NULL;
+
+	if (hexstr2bin(buf, wpabuf_put(ret, len), len)) {
+		wpabuf_free(ret);
+		return NULL;
+	}
+
+	return ret;
+}