add socks_decoder, stratum_decoder and session_flags

decoders/socks/socks_decoder_internal.h

@@ -0,0 +1,56 @@
+#include "stellar/socks_decoder.h"
+
+#define SOCKS_FIELD_VER_4 4
+#define SOCKS_FIELD_VER_5 5
+
+#define SOCKS5_REQUEST_METHOD_MIN_LEN  3
+#define SOCKS5_REQUEST_MIN_LEN 6
+#define SOCKS_VERSION_TYPE_SOCKS4 4
+#define SOCKS_VERSION_TYPE_SOCKS5 5
+
+#define SOCKS_CMD_CONNECT       0x01
+#define SOCKS_CMD_BIND          0x02
+#define SOCKS_CMD_UDP           0x03
+
+#define SOCKS5_RSV_DEFAULT		0
+#define SOCKS_ATYPE_IP4             1
+#define SOCKS_ATYPE_IP6             4
+#define SOCKS_ATYPE_FQDN          3
+
+#define SOCKS5_AUTH_NONE        0x00
+#define SOCKS5_AUTH_PASS        0x02
+
+#define SOCKS_LOG_MOUDLE        "SOCKS_DECODER"
+
+struct socks_decoder_info
+{
+	int plugin_id;
+    int sess_exdata_idx;
+	struct stellar *st;
+	struct logger *log_handle;
+	int socks_decoder_topic_id;
+	int tcp_topic_id;
+};
+
+enum socks_establish_state
+{
+    SS_BEGIN = 0,
+    SS_SUB,
+    SS_END,
+    SS_FAILED
+};
+
+enum socks_internal_state
+{
+    STATE_INIT,
+    STATE_OPENING,
+    STATE_FAILED
+};
+
+struct socks_tunnel_stream
+{
+    enum socks_internal_state state;
+    enum socks_establish_state client_state;
+    enum socks_establish_state server_state;
+    struct socks_info info;
+};