[DCCP]: Sample RTT from SYN exchange

Function:

1 files changed, 8 insertions, 0 deletions

diff --git a/net/dccp/options.c b/net/dccp/options.c
index 9074ca7977b2..14b621227323 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -563,6 +563,14 @@ int dccp_insert_options(struct sock *sk, struct sk_buff *skb)
             dccp_insert_options_feat(sk, skb))
                 return -1;
 
+        /*
+         * Obtain RTT sample from Request/Response exchange.
+         * This is currently used in CCID 3 initialisation.
+         */
+        if (DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_REQUEST &&
+            dccp_insert_option_timestamp(sk, skb))
+                return -1;
+
         /* XXX: insert other options when appropriate */
 
         if (DCCP_SKB_CB(skb)->dccpd_opt_len != 0) {