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| author |   Marco Varlese <marco.varlese@suse.com> | 2018-02-02 17:17:51 +0100 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2018-02-05 15:09:52 +0000 |
| commit | 21c8baf9a77b49af3dd54a7f64ce34dc932f10c3 (patch) | |
| tree | cc542b1b297617616b129bc34d056e7fa269a495 /src/vnet/sctp/sctp_input.c | |
| parent | 7b0933a97d8830e288ab3e350b07656196599847 (diff) | |
SCTP: calculate RTO / RTT and RTTVAR as per RFC
This patch addresses the need to calculate the RTO / RTT and RTTVAR
according to the rules depicted by the RFC4960 at section 6.3.1
Change-Id: I1d346f3c67610070b3f602f32c7738d58b99ffed
Signed-off-by: Marco Varlese <marco.varlese@suse.com>
Diffstat (limited to 'src/vnet/sctp/sctp_input.c')
| -rw-r--r-- | src/vnet/sctp/sctp_input.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/src/vnet/sctp/sctp_input.c b/src/vnet/sctp/sctp_input.c index 44624500016..0337e9f8aa0 100644 --- a/src/vnet/sctp/sctp_input.c +++ b/src/vnet/sctp/sctp_input.c @@ -427,8 +427,8 @@ sctp_is_valid_init_ack (sctp_header_t * sctp_hdr, always_inline u16 sctp_handle_init_ack (sctp_header_t * sctp_hdr, sctp_chunks_common_hdr_t * sctp_chunk_hdr, - sctp_connection_t * sctp_conn, vlib_buffer_t * b0, - u16 sctp_implied_length) + sctp_connection_t * sctp_conn, u8 idx, + vlib_buffer_t * b0, u16 sctp_implied_length) { sctp_init_ack_chunk_t *init_ack_chunk = (sctp_init_ack_chunk_t *) (sctp_hdr); @@ -450,6 +450,8 @@ sctp_handle_init_ack (sctp_header_t * sctp_hdr, if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr)) return SCTP_ERROR_BUNDLING_VIOLATION; + sctp_calculate_rto (sctp_conn, idx); + /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */ sctp_conn->remote_tag = init_ack_chunk->initiate_tag; sctp_conn->remote_initial_tsn = @@ -535,7 +537,7 @@ sctp_handle_init_ack (sctp_header_t * sctp_hdr, /* Start the T1_COOKIE timer */ sctp_timer_set (sctp_conn, sctp_pick_conn_idx_on_chunk (COOKIE_ECHO), - SCTP_TIMER_T1_COOKIE, SCTP_RTO_INIT); + SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO); return SCTP_ERROR_NONE; } @@ -764,6 +766,7 @@ sctp_handle_cookie_echo (sctp_header_t * sctp_hdr, sctp_chunks_common_hdr_t * sctp_chunk_hdr, sctp_connection_t * sctp_conn, vlib_buffer_t * b0) { + u32 now = sctp_time_now (); /* Build TCB */ u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ECHO); @@ -777,7 +780,8 @@ sctp_handle_cookie_echo (sctp_header_t * sctp_hdr, return SCTP_ERROR_INVALID_TAG; } - u32 now = sctp_time_now (); + sctp_calculate_rto (sctp_conn, idx); + u32 creation_time = clib_net_to_host_u32 (cookie_echo->cookie.creation_time); u32 cookie_lifespan = @@ -815,14 +819,14 @@ sctp_handle_cookie_ack (sctp_header_t * sctp_hdr, return SCTP_ERROR_INVALID_TAG; } + sctp_calculate_rto (sctp_conn, idx); + sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE); /* Change state */ sctp_conn->state = SCTP_STATE_ESTABLISHED; stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection); - sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T3_RXTX, SCTP_RTO_INIT); - return SCTP_ERROR_NONE; } @@ -959,11 +963,10 @@ sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node, error0 = sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr, - new_sctp_conn, b0, + new_sctp_conn, idx, b0, sctp_implied_length); sctp_init_mss (new_sctp_conn); - //sctp_init_snd_vars (new_sctp_conn); if (session_stream_connect_notify (&new_sctp_conn->sub_conn[idx].connection, 0)) @@ -1416,7 +1419,12 @@ sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk, return SCTP_ERROR_INVALID_TAG; } - sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX, SCTP_RTO_INIT); + sctp_calculate_rto (sctp_conn, idx); + + sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX, + sctp_conn->sub_conn[idx].RTO); + + sctp_conn->sub_conn[idx].RTO_pending = 0; *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4); |