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-rw-r--r--src/vnet/sctp/sctp.c11
-rw-r--r--src/vnet/sctp/sctp.h13
-rw-r--r--src/vnet/sctp/sctp_input.c26
-rw-r--r--src/vnet/sctp/sctp_output.c9
4 files changed, 44 insertions, 15 deletions
diff --git a/src/vnet/sctp/sctp.c b/src/vnet/sctp/sctp.c
index 42cc2acae91..76a1bf41eeb 100644
--- a/src/vnet/sctp/sctp.c
+++ b/src/vnet/sctp/sctp.c
@@ -615,14 +615,21 @@ sctp_session_send_mss (transport_connection_t * trans_conn)
update_cwnd (sctp_conn);
update_smallest_pmtu_idx (sctp_conn);
- return sctp_conn->sub_conn[sctp_conn->smallest_PMTU_idx].cwnd;
+ u8 idx = sctp_data_subconn_select (sctp_conn);
+
+ return sctp_conn->sub_conn[idx].cwnd;
}
u16
sctp_snd_space (sctp_connection_t * sctp_conn)
{
+ /* RFC 4096 Section 6.1; point (A) */
+ if (sctp_conn->peer_rwnd == 0)
+ return 0;
+
+ u8 idx = sctp_data_subconn_select (sctp_conn);
/* Finally, let's subtract the DATA chunk headers overhead */
- return sctp_conn->sub_conn[sctp_conn->smallest_PMTU_idx].cwnd -
+ return sctp_conn->sub_conn[idx].cwnd -
sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_full_hdr_t);
}
diff --git a/src/vnet/sctp/sctp.h b/src/vnet/sctp/sctp.h
index 32d3ab96862..f0ce5949285 100644
--- a/src/vnet/sctp/sctp.h
+++ b/src/vnet/sctp/sctp.h
@@ -93,7 +93,9 @@ enum _sctp_subconn_state
{
SCTP_SUBCONN_STATE_DOWN = 0,
SCTP_SUBCONN_STATE_UP,
- SCTP_SUBCONN_STATE_ALLOW_HB
+ SCTP_SUBCONN_STATE_ALLOW_HB,
+ SCTP_SUBCONN_AWAITING_SACK,
+ SCTP_SUBCONN_SACK_RECEIVED
};
#define SCTP_INITIAL_SSHTRESH 65535
@@ -920,6 +922,8 @@ sctp_in_cong_recovery (sctp_connection_t * sctp_conn, u8 idx)
always_inline u8
cwnd_fully_utilized (sctp_connection_t * sctp_conn, u8 idx)
{
+ if (sctp_conn->sub_conn[idx].cwnd == 0)
+ return 1;
return 0;
}
@@ -928,6 +932,7 @@ always_inline void
update_cwnd (sctp_connection_t * sctp_conn)
{
u8 i;
+ u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn;
for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
{
@@ -960,6 +965,12 @@ update_cwnd (sctp_connection_t * sctp_conn)
sctp_conn->sub_conn[i].cwnd =
clib_min (sctp_conn->sub_conn[i].PMTU, 1);
}
+
+ /* Section 6.1; point (D) */
+ if ((inflight + SCTP_RTO_BURST * sctp_conn->sub_conn[i].PMTU) <
+ sctp_conn->sub_conn[i].cwnd)
+ sctp_conn->sub_conn[i].cwnd =
+ inflight + SCTP_RTO_BURST * sctp_conn->sub_conn[i].PMTU;
}
}
diff --git a/src/vnet/sctp/sctp_input.c b/src/vnet/sctp/sctp_input.c
index 962534c1a6b..5691f0f44e6 100644
--- a/src/vnet/sctp/sctp_input.c
+++ b/src/vnet/sctp/sctp_input.c
@@ -375,7 +375,6 @@ sctp_handle_init (sctp_header_t * sctp_hdr,
sctp_conn->remote_initial_tsn);
sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
-
/*
* If the length specified in the INIT message is bigger than the size in bytes of our structure it means that
* optional parameters have been sent with the INIT chunk and we need to parse them.
@@ -725,7 +724,7 @@ sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
return 0;
}
- if (is_gapping != 0)
+ if (is_gapping)
{
SCTP_CONN_TRACKING_DBG
("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
@@ -733,6 +732,7 @@ sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
return 0;
}
+ sctp_conn->ack_state += 1;
if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
{
SCTP_CONN_TRACKING_DBG
@@ -741,8 +741,6 @@ sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
return 0;
}
- sctp_conn->ack_state += 1;
-
return 1;
}
@@ -826,12 +824,15 @@ sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
}
sctp_conn->last_rcvd_tsn = tsn;
- *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
-
SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
- sctp_prepare_sack_chunk (sctp_conn, idx, b);
+ {
+ *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
+ sctp_prepare_sack_chunk (sctp_conn, idx, b);
+ }
+ else
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
sctp_conn->sub_conn[idx].enqueue_state = error;
@@ -1022,13 +1023,13 @@ sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
sctp_connection_timers_init (new_sctp_conn);
+ sctp_init_cwnd (new_sctp_conn);
+
error0 =
sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
new_sctp_conn, idx, b0,
sctp_implied_length);
- sctp_init_cwnd (new_sctp_conn);
-
if (session_stream_connect_notify
(&new_sctp_conn->sub_conn[idx].connection, 0))
{
@@ -1505,12 +1506,15 @@ sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
u16 * next0)
{
+
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
+ sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_SACK_RECEIVED;
+
sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
/* Section 7.2.2; point (2) */
@@ -1710,12 +1714,12 @@ sctp46_listen_process_inline (vlib_main_t * vm,
sctp_init_snd_vars (child_conn);
+ sctp_init_cwnd (child_conn);
+
error0 =
sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
sctp_implied_length);
- sctp_init_cwnd (child_conn);
-
if (error0 == SCTP_ERROR_NONE)
{
if (stream_session_accept
diff --git a/src/vnet/sctp/sctp_output.c b/src/vnet/sctp/sctp_output.c
index a4ba960789e..9ac3feb8aab 100644
--- a/src/vnet/sctp/sctp_output.c
+++ b/src/vnet/sctp/sctp_output.c
@@ -463,6 +463,8 @@ sctp_prepare_init_chunk (sctp_connection_t * sctp_conn, u8 idx,
vnet_sctp_set_chunk_length (&init_chunk->chunk_hdr, chunk_len);
vnet_sctp_common_hdr_params_host_to_net (&init_chunk->chunk_hdr);
+ sctp_init_cwnd (sctp_conn);
+
init_chunk->a_rwnd = clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
init_chunk->initiate_tag = clib_host_to_net_u32 (random_u32 (&random_seed));
init_chunk->inboud_streams_count =
@@ -1405,7 +1407,12 @@ sctp_push_hdr_i (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
SCTP_ADV_DBG_OUTPUT ("POINTER_WITH_DATA = %p, DATA_OFFSET = %u",
b->data, b->current_data);
- sctp_conn->last_unacked_tsn = sctp_conn->next_tsn;
+ if (sctp_conn->sub_conn[idx].state != SCTP_SUBCONN_AWAITING_SACK)
+ {
+ sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_AWAITING_SACK;
+ sctp_conn->last_unacked_tsn = sctp_conn->next_tsn;
+ }
+
sctp_conn->next_tsn += data_len;
u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn;