dccp: Add dccp_probe support for CCID-2
This adds dccp_probe support for CCID-2.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/ccids/ccid2.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -248,6 +248,19 @@ static void ccid2_hc_tx_packet_sent(stru
#endif
}
+static size_t ccid2_hc_tx_probe(struct sock *sk, char *buf, const size_t maxlen)
+{
+ struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
+
+ /* Specific field numbering:
+ 5 6 7 8 9 10 11
+ rto rtt mdev rttvar cwnd pipe ssthresh */
+ return snprintf(buf, maxlen, " %u %u %u %u %u %u %u", hctx->rto,
+ hctx->srtt >> 3, hctx->mdev >> 2, hctx->rttvar >> 2,
+ hctx->cwnd, hctx->pipe, hctx->ssthresh);
+
+}
+
/**
* ccid2_rtt_estimator - Sample RTT and compute RTO using RFC2988 algorithm
* This code is almost identical with TCP's tcp_rtt_estimator(), since
@@ -650,6 +663,7 @@ struct ccid_operations ccid2_ops = {
.ccid_hc_tx_exit = ccid2_hc_tx_exit,
.ccid_hc_tx_send_packet = ccid2_hc_tx_send_packet,
.ccid_hc_tx_packet_sent = ccid2_hc_tx_packet_sent,
+ .ccid_hc_tx_probe = ccid2_hc_tx_probe,
.ccid_hc_tx_parse_options = ccid2_hc_tx_parse_options,
.ccid_hc_tx_packet_recv = ccid2_hc_tx_packet_recv,
.ccid_hc_rx_obj_size = sizeof(struct ccid2_hc_rx_sock),
--
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