From 49e8e28cf6bef4bacbcd30dba4cede94b5e91be0 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon>
Date: Wed, 21 Apr 2010 19:55:14 +0000
Subject: [PATCH] Check that tcp_abort/tcp_abandon isn't called for listen-pcbs

---
 src/core/tcp.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/core/tcp.c b/src/core/tcp.c
index 4a8c36d8..67fbfee4 100644
--- a/src/core/tcp.c
+++ b/src/core/tcp.c
@@ -317,7 +317,9 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
 #endif /* LWIP_CALLBACK_API */
   void *errf_arg;
 
-  
+  /* pcb->state LISTEN not allowed here */
+  LWIP_ASSERT("don't call tcp_abort/tcp_abandon for listen-pcbs",
+    pcb->state != LISTEN);
   /* Figure out on which TCP PCB list we are, and remove us. If we
      are in an active state, call the receive function associated with
      the PCB with a NULL argument, and send an RST to the remote end. */
@@ -325,7 +327,6 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
     tcp_pcb_remove(&tcp_tw_pcbs, pcb);
     memp_free(MEMP_TCP_PCB, pcb);
   } else {
-    /* @todo: pcb->state, LISTEN not allowed */
     seqno = pcb->snd_nxt;
     ackno = pcb->rcv_nxt;
     ip_addr_copy(local_ip, pcb->local_ip);