net: tcp2: Print context state when closing connection

Useful in debugging.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

subsys/net/ip/net_context.c

@@ -2212,6 +2212,22 @@ void net_context_foreach(net_context_cb_t cb, void *user_data)
 	k_sem_give(&contexts_lock);
 }
 
+const char *net_context_state(struct net_context *context)
+{
+	switch (net_context_get_state(context)) {
+	case NET_CONTEXT_IDLE:
+		return "IDLE";
+	case NET_CONTEXT_CONNECTING:
+		return "CONNECTING";
+	case NET_CONTEXT_CONNECTED:
+		return "CONNECTED";
+	case NET_CONTEXT_LISTENING:
+		return "LISTENING";
+	}
+
+	return NULL;
+}
+
 void net_context_init(void)
 {
 	k_sem_init(&contexts_lock, 1, UINT_MAX);

subsys/net/ip/net_private.h

@@ -46,6 +46,7 @@ extern void net_if_stats_reset_all(void);
 
 #if defined(CONFIG_NET_NATIVE) || defined(CONFIG_NET_OFFLOAD)
 extern void net_context_init(void);
+extern const char *net_context_state(struct net_context *context);
 extern void net_pkt_init(void);
 extern void net_tc_tx_init(void);
 extern void net_tc_rx_init(void);
@@ -54,6 +55,11 @@ static inline void net_context_init(void) { }
 static inline void net_pkt_init(void) { }
 static inline void net_tc_tx_init(void) { }
 static inline void net_tc_rx_init(void) { }
+static inline const char *net_context_state(context)
+{
+	ARG_UNUSED(context);
+	return NULL;
+}
 #endif
 
 #if defined(CONFIG_NET_NATIVE)

subsys/net/ip/tcp2.c

@@ -1383,6 +1383,9 @@ int net_tcp_put(struct net_context *context)
 	struct tcp *conn = context->tcp;
 
 	NET_DBG("%s", conn ? log_strdup(tcp_conn_state(conn, NULL)) : "");
+	NET_DBG("context %p %s", context,
+		log_strdup(({ const char *state = net_context_state(context);
+					state ? state : "<unknown>"; })));
 
 	if (conn && conn->state == TCP_ESTABLISHED) {
 		k_mutex_lock(&conn->lock, K_FOREVER);