Optimize integration testing

- Add injection package plug-in
- Add libstellar_dynamic.so to facilitate unit testing of upper-level plug-ins

test/packet_inject/packet_inject_main.h

@@ -0,0 +1,46 @@
+#ifndef _PACKET_INJECT_MAIN_H
+#define _PACKET_INJECT_MAIN_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <arpa/inet.h>
+
+#define AFTER_RECV_C2S_N_PACKET 1
+#define AFTER_RECV_S2C_N_PACKET 2
+
+enum packet_inject_type
+{
+    INJECT_TYPE_TCP_RST = 1,
+    INJECT_TYPE_TCP_FIN = 2,
+    INJECT_TYPE_TCP_PAYLOAD = 3,
+    INJECT_TYPE_TCP_PAYLOAD_FIN_RST = 4,
+    INJECT_TYPE_UDP_PAYLOAD = 5,
+    INJECT_TYPE_CTRL_MSG = 6,
+};
+
+struct packet_inject_rule
+{
+    int ip_type;
+    struct in_addr v4;  /* network order */
+    struct in6_addr v6; /* network order */
+    int port;           /* network order */
+
+    enum packet_inject_type inject_type;
+
+    // inject packet after (C2S/S2C) receiving n packets
+    int direction;   // AFTER_RECV_C2S_N_PACKET or AFTER_RECV_S2C_N_PACKET
+    uint64_t number; // n packets received
+};
+
+extern struct packet_inject_rule rule;
+
+int packet_inject_main(int argc, char **argv);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif