fix: add bounded lwip connect waits and link status helper

Drivers/LwIP/src/api/api_msg.c

@@ -1395,7 +1395,13 @@ lwip_netconn_do_connect(void *m)
 #if LWIP_TCPIP_CORE_LOCKING
               LWIP_ASSERT("state!", msg->conn->state == NETCONN_CONNECT);
               UNLOCK_TCPIP_CORE();
-              sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0);
+              if (sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), msg->conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
+                if (msg->conn->state == NETCONN_CONNECT) {
+                  msg->conn->current_msg = NULL;
+                  msg->conn->state = NETCONN_NONE;
+                  msg->err = ERR_TIMEOUT;
+                }
+              }
               LOCK_TCPIP_CORE();
               LWIP_ASSERT("state!", msg->conn->state != NETCONN_CONNECT);
 #endif /* LWIP_TCPIP_CORE_LOCKING */

Drivers/LwIP/src/include/netif/ethernetif.h

@@ -24,6 +24,7 @@ err_t ethernetif_init(struct netif *netif);
 void ethernetif_input(struct netif *netif);
 void lwip_netif_init(const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw);
 void ethernetif_check_link(void);
+uint8_t ethernetif_link_is_up(void);
 void ethernetif_poll(void);
 
 void print_netif(struct netif *netif);

Drivers/LwIP/src/netif/ethernetif.c

@@ -457,6 +457,8 @@ void ethernetif_diag_poll_status(void)
  */
 static void ethernetif_update_link(uint8_t link_status)
 {
+    LOCK_TCPIP_CORE();
+
     if (link_status)
     {
         if (!netif_is_link_up(&ch390_netif))
@@ -464,9 +466,7 @@ static void ethernetif_update_link(uint8_t link_status)
             netif_set_link_up(&ch390_netif);
             if ((s_garp_sent == 0u) && netif_is_up(&ch390_netif))
             {
-                LOCK_TCPIP_CORE();
                 etharp_gratuitous(&ch390_netif);
-                UNLOCK_TCPIP_CORE();
                 s_garp_sent = 1u;
             }
         }
@@ -479,6 +479,8 @@ static void ethernetif_update_link(uint8_t link_status)
             s_garp_sent = 0u;
         }
     }
+
+    UNLOCK_TCPIP_CORE();
 }
 
 /**
@@ -561,3 +563,8 @@ void ethernetif_check_link(void)
 
     ethernetif_update_link(link_status);
 }
+
+uint8_t ethernetif_link_is_up(void)
+{
+    return netif_is_link_up(&ch390_netif) ? 1u : 0u;
+}

Drivers/LwIP/src/netif/ethernetif.h

@@ -63,6 +63,12 @@ void ethernetif_diag_poll_status(void);
  */
 void ethernetif_check_link(void);
 
+/**
+ * @brief Query whether physical Ethernet link is currently up
+ * @return 1 if link is up, 0 otherwise
+ */
+uint8_t ethernetif_link_is_up(void);
+
 /**
  * @brief Process all pending RX packets
  * @note Call this from the LwIP task when RX interrupt occurs