[PATCH rtems-lwip 2/3] lwip/api: Notify about dropped packets

[Kinsey Moore]

The receive UDP and raw mailboxes will silently drop packets once the
mailbox is full. This provides a debug message if debugging is enabled
when this is the case to direct the user toward a solution.
---
 lwip/src/api/api_msg.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lwip/src/api/api_msg.c b/lwip/src/api/api_msg.c
index 3f08e03..e3eab42 100644
--- a/lwip/src/api/api_msg.c
+++ b/lwip/src/api/api_msg.c
@@ -191,6 +191,10 @@ recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
 
       len = q->tot_len;
       if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
+#ifdef __rtems__
+        LWIP_DEBUGF(API_MSG_DEBUG | LWIP_DBG_LEVEL_WARNING,
+          ("recv_raw: dropping packet\n"));
+#endif
         netbuf_delete(buf);
         return 0;
       } else {
@@ -270,6 +274,10 @@ recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
 
   len = p->tot_len;
   if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) {
+#ifdef __rtems__
+        LWIP_DEBUGF(API_MSG_DEBUG | LWIP_DBG_LEVEL_WARNING,
+          ("recv_udp: dropping packet\n"));
+#endif
     netbuf_delete(buf);
     return;
   } else {
-- 
2.30.2