From 43a08bef142bdd4b60ce5bb43ea8bce51e86ba3b Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon>
Date: Sat, 6 Mar 2010 12:06:27 +0000
Subject: [PATCH] tcp_accepted(): check pcb state to verify it isn't called on
 a connection-pcb

---
 src/include/lwip/tcp.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/include/lwip/tcp.h b/src/include/lwip/tcp.h
index 5fcc7a3f..f11b4cf3 100644
--- a/src/include/lwip/tcp.h
+++ b/src/include/lwip/tcp.h
@@ -328,9 +328,12 @@ void             tcp_err     (struct tcp_pcb *pcb, tcp_err_fn err);
 #define          tcp_nagle_disabled(pcb)  (((pcb)->flags & TF_NODELAY) != 0)
 
 #if TCP_LISTEN_BACKLOG
-#define          tcp_accepted(pcb) (((struct tcp_pcb_listen *)(pcb))->accepts_pending--)
+#define          tcp_accepted(pcb) do { \
+  LWIP_ASSERT("pcb->state == LISTEN (called for wrong pcb?)", pcb->state == LISTEN); \
+  (((struct tcp_pcb_listen *)(pcb))->accepts_pending--); } while(0)
 #else  /* TCP_LISTEN_BACKLOG */
-#define          tcp_accepted(pcb) LWIP_UNUSED_ARG(pcb);
+#define          tcp_accepted(pcb) LWIP_ASSERT("pcb->state == LISTEN (called for wrong pcb?)", \
+                                               pcb->state == LISTEN)
 #endif /* TCP_LISTEN_BACKLOG */
 
 void             tcp_recved  (struct tcp_pcb *pcb, u16_t len);