support packet_manager_register_node(), remove packet_manager_subscribe()

infra/packet_manager/packet_utils.c

@@ -976,6 +976,9 @@ void packet_tag_set(struct packet *pkt, uint64_t key_bits, uint64_t val_bits)
 
 void packet_tag_get(const struct packet *pkt, uint64_t *key_bits, uint64_t *val_bits)
 {
+    *key_bits = 0;
+    *val_bits = 0;
+
     *key_bits = pkt->tag_key_bits;
     *val_bits = pkt->tag_val_bits;
 }
@@ -1010,14 +1013,24 @@ bool packet_is_claim(const struct packet *pkt)
     return pkt->is_claim;
 }
 
+void packet_set_type(struct packet *pkt, enum packet_type type)
+{
+    pkt->type = type;
+}
+
 enum packet_type packet_get_type(const struct packet *pkt)
 {
     return pkt->type;
 }
 
-void packet_set_type(struct packet *pkt, enum packet_type type)
+void packet_set_stage(struct packet *pkt, enum packet_stage stage)
 {
-    pkt->type = type;
+    pkt->stage = stage;
+}
+
+enum packet_stage packet_get_stage(const struct packet *pkt)
+{
+    return pkt->stage;
 }
 
 void packet_set_action(struct packet *pkt, enum packet_action action)
@@ -1029,3 +1042,27 @@ enum packet_action packet_get_action(const struct packet *pkt)
 {
     return pkt->action;
 }
+
+int packet_get_ip_proto(const struct packet *pkt)
+{
+    return pkt->ip_proto;
+}
+
+const char *packet_stage_to_str(enum packet_stage stage)
+{
+    switch (stage)
+    {
+    case PACKET_STAGE_PREROUTING:
+        return "PACKET_STAGE_PREROUTING";
+    case PACKET_STAGE_INPUT:
+        return "PACKET_STAGE_INPUT";
+    case PACKET_STAGE_FORWARD:
+        return "PACKET_STAGE_FORWARD";
+    case PACKET_STAGE_OUTPUT:
+        return "PACKET_STAGE_OUTPUT";
+    case PACKET_STAGE_POSTROUTING:
+        return "PACKET_STAGE_POSTROUTING";
+    default:
+        return "PACKET_STAGE_UNKNOWN";
+    }
+}