From 2e6d03269117ca4854e6015f6cebbe2e5b36772e Mon Sep 17 00:00:00 2001
From: jani <jani>
Date: Wed, 5 Nov 2003 09:21:14 +0000
Subject: [PATCH] patch #2200 from Karl Jeacle, fixes tcp_output

---
 src/core/tcp_out.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
index f8f4b9c1..a9f58ae1 100644
--- a/src/core/tcp_out.c
+++ b/src/core/tcp_out.c
@@ -363,7 +363,13 @@ tcp_output(struct tcp_pcb *pcb)
 
 
   seg = pcb->unsent;
-   useg = pcb->unacked;
+
+  /* useg should point to last segment on unacked queue */
+  useg = pcb->unacked;
+  if (useg != NULL) {
+    for (; useg->next != NULL; useg = useg->next);
+  }                                                                             
+
    
   /* If the TF_ACK_NOW flag is set, we check if there is data that is
      to be sent. If data is to be sent out, we'll just piggyback our