snort: snort3 plugin and DAQ

Zero copy interface which exposes VPP buffers to snort instance(s).
Includes VPP DAQ which is compiled only if libdaq 3 API headers are
available.

Type: feature
Change-Id: I96611b43f94fbae091e7391589e0454ae66de88b
Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/plugins/snort/daq_vpp.h b/src/plugins/snort/daq_vpp.h
new file mode 100644
index 00000000000..3b875aa15ad
--- /dev/null
+++ b/src/plugins/snort/daq_vpp.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2021 Cisco Systems, Inc.
+ */
+
+#ifndef __DAQ_VPP_H__
+#define __DAQ_VPP_H__
+
+#include <stdint.h>
+
+#define DAQ_VPP_DEFAULT_SOCKET_FILE "snort.sock"
+#define DAQ_VPP_DEFAULT_SOCKET_PATH "/run/vpp/" DAQ_VPP_DEFAULT_SOCKET_FILE
+#define DAQ_VPP_INST_NAME_LEN	    32
+
+typedef enum memif_msg_type
+{
+  DAQ_VPP_MSG_TYPE_NONE = 0,
+  DAQ_VPP_MSG_TYPE_HELLO = 1,
+  DAQ_VPP_MSG_TYPE_CONFIG = 2,
+  DAQ_VPP_MSG_TYPE_BPOOL = 3,
+  DAQ_VPP_MSG_TYPE_QPAIR = 4,
+} daq_vpp_msg_type_t;
+
+typedef struct
+{
+  char inst_name[DAQ_VPP_INST_NAME_LEN];
+} daq_vpp_msg_hello_t;
+
+typedef struct
+{
+  uint32_t shm_size;
+  uint16_t num_bpools;
+  uint16_t num_qpairs;
+} daq_vpp_msg_config_t;
+
+typedef struct
+{
+  uint32_t size;
+} daq_vpp_msg_bpool_t;
+
+typedef struct
+{
+  uint8_t log2_queue_size;
+  uint32_t desc_table_offset;
+  uint32_t enq_head_offset;
+  uint32_t deq_head_offset;
+  uint32_t enq_ring_offset;
+  uint32_t deq_ring_offset;
+} daq_vpp_msg_qpair_t;
+
+typedef struct
+{
+  daq_vpp_msg_type_t type : 8;
+  union
+  {
+    daq_vpp_msg_hello_t hello;
+    daq_vpp_msg_config_t config;
+    daq_vpp_msg_bpool_t bpool;
+    daq_vpp_msg_qpair_t qpair;
+  };
+} daq_vpp_msg_t;
+
+typedef enum
+{
+  DAQ_VPP_ACTION_DROP,
+  DAQ_VPP_ACTION_FORWARD,
+} daq_vpp_action_t;
+
+typedef struct
+{
+  uint32_t offset;
+  uint16_t length;
+  uint16_t address_space_id;
+  uint8_t buffer_pool;
+  daq_vpp_action_t action : 8;
+} daq_vpp_desc_t;
+
+#endif /* __DAQ_VPP_H__ */