suricata checkin based on commit id a4bce14770beee46a537eda3c3f6e8e8565d5d0a

Change-Id: I9a214fa0ee95e58fc640e50bd604dac7f42db48f

1 files changed, 87 insertions, 0 deletions

diff --git a/framework/src/suricata/src/util-buffer.c b/framework/src/suricata/src/util-buffer.c
new file mode 100644
index 00000000..d4f50b06
--- /dev/null
+++ b/framework/src/suricata/src/util-buffer.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 2007-2012 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * \file
+ *
+ * \author Anoop Saldanha <anoopsaldanha@gmail.com>
+ */
+
+#include "suricata-common.h"
+#include "suricata.h"
+#include "util-debug.h"
+#include "util-buffer.h"
+
+/* 10 mb */
+#define MAX_LIMIT 10485760
+
+MemBuffer *MemBufferCreateNew(uint32_t size)
+{
+    if (size > MAX_LIMIT) {
+        SCLogWarning(SC_ERR_MEM_BUFFER_API, "Mem buffer asked to create "
+                     "buffer with size greater than API limit - %d", MAX_LIMIT);
+        return NULL;
+    }
+
+    uint32_t total_size = size + sizeof(MemBuffer);
+
+    MemBuffer *buffer = SCMalloc(total_size);
+    if (unlikely(buffer == NULL)) {
+        return NULL;
+    }
+    memset(buffer, 0, total_size);
+
+    buffer->size = size;
+    buffer->buffer = (uint8_t *)buffer + sizeof(MemBuffer);
+
+    return buffer;
+}
+
+/** \brief expand membuffer by size of 'expand_by'
+ *
+ *  If expansion failed, buffer will still be valid.
+ *
+ *  \retval result 0 ok, -1 expansion failed
+ */
+int MemBufferExpand(MemBuffer **buffer, uint32_t expand_by) {
+    if (((*buffer)->size + expand_by) > MAX_LIMIT) {
+        SCLogWarning(SC_ERR_MEM_BUFFER_API, "Mem buffer asked to create "
+                     "buffer with size greater than API limit - %d", MAX_LIMIT);
+        return -1;
+    }
+
+    uint32_t total_size = (*buffer)->size + sizeof(MemBuffer) + expand_by;
+
+    MemBuffer *tbuffer = SCRealloc(*buffer, total_size);
+    if (unlikely(tbuffer == NULL)) {
+        return -1;
+    }
+
+    *buffer = tbuffer;
+    (*buffer)->size += expand_by;
+    (*buffer)->buffer = (uint8_t *)tbuffer + sizeof(MemBuffer);
+
+    SCLogDebug("expanded buffer by %u, size is now %u", expand_by, (*buffer)->size);
+    return 0;
+}
+
+void MemBufferFree(MemBuffer *buffer)
+{
+    SCFree(buffer);
+
+    return;
+}