1 files changed, 126 insertions, 0 deletions
diff --git a/src/pkt-var.c b/src/pkt-var.c
new file mode 100644
index 0000000..a81af35
--- /dev/null
+++ b/src/pkt-var.c
@@ -0,0 +1,126 @@
+/* Copyright (C) 2007-2016 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 Victor Julien <victor@inliniac.net>
+ *
+ * Implements per packet vars
+ *
+ * \todo move away from a linked list implementation
+ * \todo use different datatypes, such as string, int, etc.
+ * \todo have more than one instance of the same var, and be able to match on a
+ *   specific one, or one all at a time. So if a certain capture matches
+ *   multiple times, we can operate on all of them.
+ */
+
+#include "suricata-common.h"
+#include "decode.h"
+#include "pkt-var.h"
+#include "util-debug.h"
+
+/* get the pktvar with name 'name' from the pkt
+ *
+ * name is a normal string*/
+PktVar *PktVarGet(Packet *p, uint32_t id)
+{
+    PktVar *pv = p->pktvar;
+
+    for (;pv != NULL; pv = pv->next) {
+        if (pv->id == id)
+            return pv;
+    }
+
+    return NULL;
+}
+
+/**
+ *  \brief add a key-value pktvar to the pkt
+ *  \retval r 0 ok, -1 error
+ */
+int PktVarAddKeyValue(Packet *p, uint8_t *key, uint16_t ksize, uint8_t *value, uint16_t size)
+{
+    PktVar *pv = SCCalloc(1, sizeof(PktVar));
+    if (unlikely(pv == NULL))
+        return -1;
+
+    pv->key = key;
+    pv->key_len = ksize;
+    pv->value = value;
+    pv->value_len = size;
+
+    PktVar *tpv = p->pktvar;
+    if (p->pktvar == NULL)
+        p->pktvar = pv;
+    else {
+        while(tpv) {
+            if (tpv->next == NULL) {
+                tpv->next = pv;
+                return 0;
+            }
+            tpv = tpv->next;
+        }
+    }
+    return 0;
+}
+
+/**
+ *  \brief add a key-value pktvar to the pkt
+ *  \retval r 0 ok, -1 error
+ */
+int PktVarAdd(Packet *p, uint32_t id, uint8_t *value, uint16_t size)
+{
+    PktVar *pv = SCCalloc(1, sizeof(PktVar));
+    if (unlikely(pv == NULL))
+        return -1;
+
+    pv->id = id;
+    pv->value = value;
+    pv->value_len = size;
+
+    PktVar *tpv = p->pktvar;
+    if (p->pktvar == NULL)
+        p->pktvar = pv;
+    else {
+        while(tpv) {
+            if (tpv->next == NULL) {
+                tpv->next = pv;
+                return 0;
+            }
+            tpv = tpv->next;
+        }
+    }
+    return 0;
+}
+
+void PktVarFree(PktVar *pv)
+{
+    if (pv == NULL)
+        return;
+
+    if (pv->key != NULL)
+        SCFree(pv->key);
+    if (pv->value != NULL)
+        SCFree(pv->value);
+    PktVar *pv_next = pv->next;
+
+    SCFree(pv);
+
+    if (pv_next != NULL)
+        PktVarFree(pv_next);
+}