From: Jouni Malinen <j@w1.fi>
Date: Sun, 20 Dec 2009 10:52:54 +0000 (+0200)
Subject: wpabuf: Allow wpabuf_resize(NULL, len) to be used
X-Git-Tag: hostap_0_7_1~291
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=859db534bf29e360adfdc7da6a0bf0ad86fc1ec2;p=thirdparty%2Fhostap.git

wpabuf: Allow wpabuf_resize(NULL, len) to be used

This matches with realloc() usage, i.e., allocate a new buffer if no
buffer was specified.
---

diff --git a/src/utils/wpabuf.c b/src/utils/wpabuf.c
index c5441790e..8181912ea 100644
--- a/src/utils/wpabuf.c
+++ b/src/utils/wpabuf.c
@@ -29,6 +29,10 @@ static void wpabuf_overflow(const struct wpabuf *buf, size_t len)
 int wpabuf_resize(struct wpabuf **_buf, size_t add_len)
 {
 	struct wpabuf *buf = *_buf;
+	if (buf == NULL) {
+		*_buf = wpabuf_alloc(add_len);
+		return *_buf == NULL ? -1 : 0;
+	}
 	if (buf->used + add_len > buf->size) {
 		unsigned char *nbuf;
 		if (buf->ext_data) {