suricata checkin based on commit id a4bce14770beee46a537eda3c3f6e8e8565d5d0a

Change-Id: I9a214fa0ee95e58fc640e50bd604dac7f42db48f

1 files changed, 168 insertions, 0 deletions

diff --git a/framework/src/suricata/src/flow-var.c b/framework/src/suricata/src/flow-var.c
new file mode 100644
index 00000000..5262b5a7
--- /dev/null
+++ b/framework/src/suricata/src/flow-var.c
@@ -0,0 +1,168 @@
+/* Copyright (C) 2007-2010 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>
+ * \author Pablo Rincon <pablo.rincon.crespo@gmail.com>
+ *
+ * Flow level variable support for complex detection rules
+ * Supported types atm are String and Integers
+ */
+
+#include "suricata-common.h"
+#include "threads.h"
+#include "flow-var.h"
+#include "flow.h"
+#include "detect.h"
+#include "util-debug.h"
+
+/* puts a new value into a flowvar */
+static void FlowVarUpdateStr(FlowVar *fv, uint8_t *value, uint16_t size)
+{
+    if (fv->data.fv_str.value)
+        SCFree(fv->data.fv_str.value);
+    fv->data.fv_str.value = value;
+    fv->data.fv_str.value_len = size;
+}
+
+/* puts a new value into a flowvar */
+static void FlowVarUpdateInt(FlowVar *fv, uint32_t value)
+{
+    fv->data.fv_int.value = value;
+}
+
+/** \brief get the flowvar with index 'idx' from the flow
+ *  \note flow is not locked by this function, caller is
+ *        responsible
+ */
+FlowVar *FlowVarGet(Flow *f, uint16_t idx)
+{
+    GenericVar *gv = f->flowvar;
+
+    for ( ; gv != NULL; gv = gv->next) {
+        if (gv->type == DETECT_FLOWVAR && gv->idx == idx)
+            return (FlowVar *)gv;
+    }
+
+    return NULL;
+}
+
+/* add a flowvar to the flow, or update it */
+void FlowVarAddStrNoLock(Flow *f, uint16_t idx, uint8_t *value, uint16_t size)
+{
+    FlowVar *fv = FlowVarGet(f, idx);
+    if (fv == NULL) {
+        fv = SCMalloc(sizeof(FlowVar));
+        if (unlikely(fv == NULL))
+            return;
+
+        fv->type = DETECT_FLOWVAR;
+        fv->datatype = FLOWVAR_TYPE_STR;
+        fv->idx = idx;
+        fv->data.fv_str.value = value;
+        fv->data.fv_str.value_len = size;
+        fv->next = NULL;
+
+        GenericVarAppend(&f->flowvar, (GenericVar *)fv);
+    } else {
+        FlowVarUpdateStr(fv, value, size);
+    }
+}
+
+/* add a flowvar to the flow, or update it */
+void FlowVarAddStr(Flow *f, uint16_t idx, uint8_t *value, uint16_t size)
+{
+    FLOWLOCK_WRLOCK(f);
+    FlowVarAddStrNoLock(f, idx, value, size);
+    FLOWLOCK_UNLOCK(f);
+}
+
+/* add a flowvar to the flow, or update it */
+void FlowVarAddIntNoLock(Flow *f, uint16_t idx, uint32_t value)
+{
+    FlowVar *fv = FlowVarGet(f, idx);
+    if (fv == NULL) {
+        fv = SCMalloc(sizeof(FlowVar));
+        if (unlikely(fv == NULL))
+            return;
+
+        fv->type = DETECT_FLOWVAR;
+        fv->datatype = FLOWVAR_TYPE_INT;
+        fv->idx = idx;
+        fv->data.fv_int.value= value;
+        fv->next = NULL;
+
+        GenericVarAppend(&f->flowvar, (GenericVar *)fv);
+    } else {
+        FlowVarUpdateInt(fv, value);
+    }
+}
+
+/* add a flowvar to the flow, or update it */
+void FlowVarAddInt(Flow *f, uint16_t idx, uint32_t value)
+{
+    FLOWLOCK_WRLOCK(f);
+    FlowVarAddIntNoLock(f, idx, value);
+    FLOWLOCK_UNLOCK(f);
+}
+
+void FlowVarFree(FlowVar *fv)
+{
+    if (fv == NULL)
+        return;
+
+    if (fv->datatype == FLOWVAR_TYPE_STR) {
+        if (fv->data.fv_str.value != NULL)
+            SCFree(fv->data.fv_str.value);
+    }
+    SCFree(fv);
+}
+
+void FlowVarPrint(GenericVar *gv)
+{
+    uint16_t u;
+
+    if (!SCLogDebugEnabled())
+        return;
+
+    if (gv == NULL)
+        return;
+
+    if (gv->type == DETECT_FLOWVAR || gv->type == DETECT_FLOWINT) {
+        FlowVar *fv = (FlowVar *)gv;
+
+        if (fv->datatype == FLOWVAR_TYPE_STR) {
+            SCLogDebug("Name idx \"%" PRIu16 "\", Value \"", fv->idx);
+            for (u = 0; u < fv->data.fv_str.value_len; u++) {
+                if (isprint(fv->data.fv_str.value[u]))
+                    SCLogDebug("%c", fv->data.fv_str.value[u]);
+                else
+                    SCLogDebug("\\%02X", fv->data.fv_str.value[u]);
+            }
+            SCLogDebug("\", Len \"%" PRIu16 "\"\n", fv->data.fv_str.value_len);
+        } else if (fv->datatype == FLOWVAR_TYPE_INT) {
+            SCLogDebug("Name idx \"%" PRIu16 "\", Value \"%" PRIu32 "\"", fv->idx,
+                    fv->data.fv_int.value);
+        } else {
+            SCLogDebug("Unknown data type at flowvars\n");
+        }
+    }
+    FlowVarPrint(gv->next);
+}
+