session manager add packet_tag: (PKT_TAG_KEY_SESS, PKT_TAG_VAL_SESS_NEW/FREE/CTRL_MSG/TCP_STREAM)

infra/tcp_reassembly/tcp_reassembly.c

@@ -17,6 +17,7 @@ struct tcp_segment_internal
     struct interval_tree_node node;
     TAILQ_ENTRY(tcp_segment_internal) lru;
     struct tcp_segment seg;
+    void *user_data;
     void *data; // flexible array member
 };
 
@@ -66,6 +67,18 @@ void tcp_segment_free(struct tcp_segment *seg)
     }
 }
 
+void tcp_segment_set_user_data(struct tcp_segment *seg, void *user_data)
+{
+    struct tcp_segment_internal *p = container_of(seg, struct tcp_segment_internal, seg);
+    p->user_data = user_data;
+}
+
+void *tcp_segment_get_user_data(const struct tcp_segment *seg)
+{
+    struct tcp_segment_internal *p = container_of(seg, struct tcp_segment_internal, seg);
+    return p->user_data;
+}
+
 struct tcp_reassembly *tcp_reassembly_new(uint64_t max_timeout, uint64_t max_seg_num)
 {
     struct tcp_reassembly *tcp_reass = (struct tcp_reassembly *)malloc(sizeof(struct tcp_reassembly));