To make life easier we get the initial rtt from the difference between the
request and response packets. This is proposed as an erratum to RFC4342.
Signed-off-by: Ian McDonald <ian.mcdonald@xxxxxxxxxxx>
---
diff --git a/net/dccp/input.c b/net/dccp/input.c
index b06389c..a0e2faa 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -18,6 +18,7 @@
#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
+#include "ccids/ccid3.h"
static void dccp_fin(struct sock *sk, struct sk_buff *skb)
{
@@ -290,6 +291,19 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
if (dh->dccph_type == DCCP_PKT_RESPONSE) {
const struct inet_connection_sock *icsk = inet_csk(sk);
struct dccp_sock *dp = dccp_sk(sk);
+ const struct dccp_minisock *dmsk = dccp_msk(sk);
+
+ if (dmsk->dccpms_tx_ccid == DCCPC_CCID3) {
+ struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
+ struct timeval now;
+
+ do_gettimeofday(&now);
+ hctx->ccid3hctx_rtt = timeval_delta(&now,
+ &dp->dccps_epoch);
+
+ dccp_pr_debug("Received DCCP_PKT_RESPONSE, rtt =%u\n",
+ hctx->ccid3hctx_rtt);
+ }
/* Stop the REQUEST timer */
inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS);
-
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