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| author | Xin Long <lucien.xin@gmail.com> | 2021-06-22 21:04:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-22 21:28:52 +0300 |
| commit | 92548ec2f1f92d0c0b60ce59592b645571672568 (patch) | |
| tree | 61452953d827760f72aee433d9d1ccc794fe244e /include/net/sctp/structs.h | |
| parent | d9e2e410ae301d4b540e965daca51de0e65e8a26 (diff) | |
| download | linux-92548ec2f1f92d0c0b60ce59592b645571672568.tar.xz | |
sctp: add the probe timer in transport for PLPMTUD
There are 3 timers described in rfc8899#section-5.1.1:
PROBE_TIMER, PMTU_RAISE_TIMER, CONFIRMATION_TIMER
This patches adds a 'probe_timer' in transport, and it works as either
PROBE_TIMER or PMTU_RAISE_TIMER. At most time, it works as PROBE_TIMER
and expires every a 'probe_interval' time to send the HB probe packet.
When transport pl enters COMPLETE state, it works as PMTU_RAISE_TIMER
and expires in 'probe_interval * 30' time to go back to SEARCH state
and do searching again.
SCTP HB is an acknowledged packet, CONFIRMATION_TIMER is not needed.
The timer will start when transport pl enters BASE state and stop
when it enters DISABLED state.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sctp/structs.h')
| -rw-r--r-- | include/net/sctp/structs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 85d3566c2227..a3772f8ee7f6 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -936,6 +936,9 @@ struct sctp_transport { /* Timer to handler reconf chunk rtx */ struct timer_list reconf_timer; + /* Timer to send a probe HB packet for PLPMTUD */ + struct timer_list probe_timer; + /* Since we're using per-destination retransmission timers * (see above), we're also using per-destination "transmitted" * queues. This probably ought to be a private struct @@ -1003,6 +1006,7 @@ void sctp_transport_free(struct sctp_transport *); void sctp_transport_reset_t3_rtx(struct sctp_transport *); void sctp_transport_reset_hb_timer(struct sctp_transport *); void sctp_transport_reset_reconf_timer(struct sctp_transport *transport); +void sctp_transport_reset_probe_timer(struct sctp_transport *transport); int sctp_transport_hold(struct sctp_transport *); void sctp_transport_put(struct sctp_transport *); void sctp_transport_update_rto(struct sctp_transport *, __u32); |