tcp: cc algos handle cwnd on congestion signal

[vpp.git] / src / vnet / tcp / tcp_newreno.c

diff --git a/src/vnet/tcp/tcp_newreno.c b/src/vnet/tcp/tcp_newreno.c
index 7e37efb..8b704a6 100644 (file)
--- a/src/vnet/tcp/tcp_newreno.c
+++ b/src/vnet/tcp/tcp_newreno.c
@@ -19,6 +19,12 @@ static void
 newreno_congestion (tcp_connection_t * tc)
 {
   tc->ssthresh = clib_max (tcp_flight_size (tc) / 2, 2 * tc->snd_mss);
+  tc->cwnd = tc->ssthresh;
+  /* Post retransmit update cwnd to ssthresh and account for the
+   * three segments that have left the network and should've been
+   * buffered at the receiver XXX */
+  if (!tcp_opts_sack_permitted (&tc->rcv_opts))
+    tc->cwnd += 3 * tc->snd_mss;
 }
 
 static void