From dd245c63d7e2660de173b81e3764037be0ab5cea Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Sun, 25 Mar 2012 17:19:46 +0200
Subject: [PATCH] tcp_abort/tcp_abandon: don't send RST if pcb->state is CLOSED

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

diff --git a/src/core/tcp.c b/src/core/tcp.c
index 3bcd41a3..05e7c7d8 100644
--- a/src/core/tcp.c
+++ b/src/core/tcp.c
@@ -375,6 +375,7 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
     tcp_pcb_remove(&tcp_tw_pcbs, pcb);
     memp_free(MEMP_TCP_PCB, pcb);
   } else {
+    int send_rst = reset && (pcb->state != CLOSED);
     seqno = pcb->snd_nxt;
     ackno = pcb->rcv_nxt;
 #if LWIP_CALLBACK_API
@@ -393,7 +394,7 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
       tcp_segs_free(pcb->ooseq);
     }
 #endif /* TCP_QUEUE_OOSEQ */
-    if (reset) {
+    if (send_rst) {
       LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_abandon: sending RST\n"));
       tcp_rst(seqno, ackno, &pcb->local_ip, &pcb->remote_ip, pcb->local_port, pcb->remote_port, PCB_ISIPV6(pcb));
     }