From 0dbed5b91995c6fc9be476e371a7d96de6c75c10 Mon Sep 17 00:00:00 2001
From: George Oikonomou <george@contiki-os.org>
Date: Sat, 22 Nov 2014 21:49:05 +0100
Subject: [PATCH] Allow specifying a max outgoing segment size per TCP socket

---
 core/net/ip/tcp-socket.c | 5 +++--
 core/net/ip/tcp-socket.h | 1 +
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/net/ip/tcp-socket.c b/core/net/ip/tcp-socket.c
index f914ae206..aa6e7656f 100644
--- a/core/net/ip/tcp-socket.c
+++ b/core/net/ip/tcp-socket.c
@@ -56,10 +56,10 @@ call_event(struct tcp_socket *s, tcp_socket_event_t event)
 static void
 senddata(struct tcp_socket *s)
 {
-  int len;
+  int len = MIN(s->output_data_max_seg, uip_mss());
 
   if(s->output_data_len > 0) {
-    len = MIN(s->output_data_len, uip_mss());
+    len = MIN(s->output_data_len, len);
     s->output_data_send_nxt = len;
     uip_send(s->output_data_ptr, len);
   }
@@ -255,6 +255,7 @@ tcp_socket_register(struct tcp_socket *s, void *ptr,
   s->input_data_maxlen = input_databuf_len;
   s->output_data_ptr = output_databuf;
   s->output_data_maxlen = output_databuf_len;
+  s->output_data_max_seg = uip_mss();
   s->input_callback = input_callback;
   s->event_callback = event_callback;
   list_add(socketlist, s);
diff --git a/core/net/ip/tcp-socket.h b/core/net/ip/tcp-socket.h
index aea678049..208bc8288 100644
--- a/core/net/ip/tcp-socket.h
+++ b/core/net/ip/tcp-socket.h
@@ -95,6 +95,7 @@ struct tcp_socket {
   uint16_t output_data_maxlen;
   uint16_t output_data_len;
   uint16_t output_data_send_nxt;
+  uint16_t output_data_max_seg;
 
   uint8_t flags;
   uint16_t listen_port;