b->current_length = 0;
b->total_length_not_including_first_buffer = 0;
vnet_buffer (b)->sctp.flags = 0;
+ vnet_buffer (b)->sctp.subconn_idx = MAX_SCTP_CONNECTIONS;
/* Leave enough space for headers */
return vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
b->total_length_not_including_first_buffer = 0;
vnet_buffer (b)->sctp.flags = 0;
+ vnet_buffer (b)->sctp.subconn_idx = MAX_SCTP_CONNECTIONS;
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b);
/* Leave enough space for headers */
return vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
}
}
-always_inline void
-sctp_enqueue_to_output (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
- u8 is_ip4)
-{
- sctp_enqueue_to_output_i (vm, b, bi, is_ip4, 0);
-}
-
always_inline void
sctp_enqueue_to_output_now (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
u8 is_ip4)
* Convert buffer to INIT
*/
void
-sctp_prepare_init_chunk (sctp_connection_t * sctp_conn, vlib_buffer_t * b)
+sctp_prepare_init_chunk (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b)
{
u32 random_seed = random_default_seed ();
u16 alloc_bytes = sizeof (sctp_init_chunk_t);
- sctp_sub_connection_t *sub_conn =
- &sctp_conn->sub_conn[sctp_pick_conn_idx_on_chunk (INIT)];
+ sctp_sub_connection_t *sub_conn = &sctp_conn->sub_conn[idx];
sctp_ipv4_addr_param_t *ip4_param = 0;
sctp_ipv6_addr_param_t *ip6_param = 0;
vnet_sctp_set_chunk_length (&init_chunk->chunk_hdr, chunk_len);
vnet_sctp_common_hdr_params_host_to_net (&init_chunk->chunk_hdr);
- init_chunk->a_rwnd = clib_host_to_net_u32 (DEFAULT_A_RWND);
+ 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 =
clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
sctp_conn->local_tag = init_chunk->initiate_tag;
vnet_buffer (b)->sctp.connection_index = sub_conn->c_c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
SCTP_DBG_STATE_MACHINE ("CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
"CHUNK_TYPE = %s, "
}
void
-sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn,
+sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b)
{
vlib_main_t *vm = vlib_get_main ();
- u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ACK);
sctp_reuse_buffer (vm, b);
vnet_sctp_set_chunk_type (&cookie_ack_chunk->chunk_hdr, COOKIE_ACK);
vnet_sctp_set_chunk_length (&cookie_ack_chunk->chunk_hdr, chunk_len);
- /* Measure RTT with this */
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
-
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
void
-sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn,
+sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b,
sctp_state_cookie_param_t * sc)
{
vlib_main_t *vm = vlib_get_main ();
- u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ECHO);
sctp_reuse_buffer (vm, b);
clib_memcpy (&(cookie_echo_chunk->cookie), sc,
sizeof (sctp_state_cookie_param_t));
- /* Measure RTT with this */
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
+ vnet_buffer (b)->sctp.connection_index =
+ sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
+}
+
+/**
+ * Convert buffer to ABORT
+ */
+/*
+void
+sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b, ip4_address_t * ip4_addr,
+ ip6_address_t * ip6_addr)
+{
+ vlib_main_t *vm = vlib_get_main ();
+
+ sctp_reuse_buffer (vm, b);
+
+ // The minimum size of the message is given by the sctp_operation_error_t
+ u16 alloc_bytes = sizeof (sctp_operation_error_t);
+
+ // As per RFC 4960 the chunk_length value does NOT contemplate
+ // the size of the first header (see sctp_header_t) and any padding
+ //
+ u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
+
+ alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
+
+ sctp_operation_error_t *err_chunk =
+ vlib_buffer_push_uninit (b, alloc_bytes);
+
+ // src_port & dst_port are already in network byte-order
+ err_chunk->sctp_hdr.checksum = 0;
+ err_chunk->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
+ err_chunk->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
+ // As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk
+ err_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
+
+ vnet_sctp_set_chunk_type (&err_chunk->chunk_hdr, OPERATION_ERROR);
+ vnet_sctp_set_chunk_length (&err_chunk->chunk_hdr, chunk_len);
+
+ vnet_buffer (b)->sctp.connection_index =
+ sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
+}
+*/
+
+/**
+ * Convert buffer to ABORT
+ */
+void
+sctp_prepare_abort_for_collision (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b, ip4_address_t * ip4_addr,
+ ip6_address_t * ip6_addr)
+{
+ vlib_main_t *vm = vlib_get_main ();
+
+ sctp_reuse_buffer (vm, b);
+
+ /* The minimum size of the message is given by the sctp_abort_chunk_t */
+ u16 alloc_bytes = sizeof (sctp_abort_chunk_t);
+
+ /* As per RFC 4960 the chunk_length value does NOT contemplate
+ * the size of the first header (see sctp_header_t) and any padding
+ */
+ u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
+
+ alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
+
+ sctp_abort_chunk_t *abort_chunk = vlib_buffer_push_uninit (b, alloc_bytes);
+
+ /* src_port & dst_port are already in network byte-order */
+ abort_chunk->sctp_hdr.checksum = 0;
+ abort_chunk->sctp_hdr.src_port =
+ sctp_conn->sub_conn[idx].connection.lcl_port;
+ abort_chunk->sctp_hdr.dst_port =
+ sctp_conn->sub_conn[idx].connection.rmt_port;
+ /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */
+ abort_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
+
+ vnet_sctp_set_chunk_type (&abort_chunk->chunk_hdr, ABORT);
+ vnet_sctp_set_chunk_length (&abort_chunk->chunk_hdr, chunk_len);
+
+ vnet_buffer (b)->sctp.connection_index =
+ sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
+}
+
+/**
+ * Convert buffer to INIT-ACK
+ */
+void
+sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn,
+ u8 idx, vlib_buffer_t * b,
+ ip4_address_t * ip4_addr,
+ ip6_address_t * ip6_addr)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ sctp_ipv4_addr_param_t *ip4_param = 0;
+ sctp_ipv6_addr_param_t *ip6_param = 0;
+
+ sctp_reuse_buffer (vm, b);
+
+ /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
+ u16 alloc_bytes =
+ sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t);
+
+ if (PREDICT_TRUE (ip4_addr != NULL))
+ {
+ /* Create room for variable-length fields in the INIT_ACK chunk */
+ alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
+ }
+ if (PREDICT_TRUE (ip6_addr != NULL))
+ {
+ /* Create room for variable-length fields in the INIT_ACK chunk */
+ alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
+ }
+
+ if (sctp_conn->sub_conn[idx].connection.is_ip4)
+ alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
+ else
+ alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
+
+ /* As per RFC 4960 the chunk_length value does NOT contemplate
+ * the size of the first header (see sctp_header_t) and any padding
+ */
+ u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
+
+ alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
+
+ sctp_init_ack_chunk_t *init_ack_chunk =
+ vlib_buffer_push_uninit (b, alloc_bytes);
+
+ u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
+
+ /* Create State Cookie parameter */
+ sctp_state_cookie_param_t *state_cookie_param =
+ (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset);
+
+ state_cookie_param->param_hdr.type =
+ clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE);
+ state_cookie_param->param_hdr.length =
+ clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t));
+ state_cookie_param->creation_time = clib_host_to_net_u32 (sctp_time_now ());
+ state_cookie_param->cookie_lifespan =
+ clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE);
+
+ sctp_compute_mac (sctp_conn, state_cookie_param);
+
+ pointer_offset += sizeof (sctp_state_cookie_param_t);
+
+ if (PREDICT_TRUE (ip4_addr != NULL))
+ {
+ sctp_ipv4_addr_param_t *ipv4_addr =
+ (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
+
+ ipv4_addr->param_hdr.type =
+ clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE);
+ ipv4_addr->param_hdr.length =
+ clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH);
+ ipv4_addr->address.as_u32 = ip4_addr->as_u32;
+
+ pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
+ }
+ if (PREDICT_TRUE (ip6_addr != NULL))
+ {
+ sctp_ipv6_addr_param_t *ipv6_addr =
+ (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
+
+ ipv6_addr->param_hdr.type =
+ clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE);
+ ipv6_addr->param_hdr.length =
+ clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH);
+ ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0];
+ ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1];
+
+ pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
+ }
+
+ if (sctp_conn->sub_conn[idx].connection.is_ip4)
+ {
+ ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
+ ip4_param->address.as_u32 =
+ sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32;
+
+ pointer_offset += sizeof (sctp_ipv4_addr_param_t);
+ }
+ else
+ {
+ ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
+ ip6_param->address.as_u64[0] =
+ sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0];
+ ip6_param->address.as_u64[1] =
+ sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1];
+
+ pointer_offset += sizeof (sctp_ipv6_addr_param_t);
+ }
+
+ /* src_port & dst_port are already in network byte-order */
+ init_ack_chunk->sctp_hdr.checksum = 0;
+ init_ack_chunk->sctp_hdr.src_port =
+ sctp_conn->sub_conn[idx].connection.lcl_port;
+ init_ack_chunk->sctp_hdr.dst_port =
+ sctp_conn->sub_conn[idx].connection.rmt_port;
+ /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */
+ init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
+ init_ack_chunk->initial_tsn =
+ clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
+ SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u",
+ init_ack_chunk->initial_tsn);
+
+ vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK);
+ vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len);
+
+ init_ack_chunk->initiate_tag = sctp_conn->local_tag;
+
+ init_ack_chunk->a_rwnd =
+ clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
+ init_ack_chunk->inboud_streams_count =
+ clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
+ init_ack_chunk->outbound_streams_count =
+ clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
/**
* Convert buffer to INIT-ACK
*/
void
-sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
- ip4_address_t * ip4_addr,
+sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b, ip4_address_t * ip4_addr,
ip6_address_t * ip6_addr)
{
vlib_main_t *vm = vlib_get_main ();
sctp_ipv4_addr_param_t *ip4_param = 0;
sctp_ipv6_addr_param_t *ip6_param = 0;
- u8 idx = sctp_pick_conn_idx_on_chunk (INIT_ACK);
u32 random_seed = random_default_seed ();
sctp_reuse_buffer (vm, b);
init_ack_chunk->initiate_tag =
clib_host_to_net_u32 (random_u32 (&random_seed));
- init_ack_chunk->a_rwnd = clib_host_to_net_u32 (DEFAULT_A_RWND);
+ init_ack_chunk->a_rwnd =
+ clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
init_ack_chunk->inboud_streams_count =
clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
init_ack_chunk->outbound_streams_count =
sctp_conn->local_tag = init_ack_chunk->initiate_tag;
- /* Measure RTT with this */
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
-
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
/**
* Convert buffer to SHUTDOWN
*/
void
-sctp_prepare_shutdown_chunk (sctp_connection_t * sctp_conn, vlib_buffer_t * b)
+sctp_prepare_shutdown_chunk (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b)
{
- u8 idx = sctp_pick_conn_idx_on_chunk (SHUTDOWN);
u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
/* As per RFC 4960 the chunk_length value does NOT contemplate
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
/*
if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
return;
+ u8 idx = MAIN_SCTP_SUB_CONN_IDX;
+
b = vlib_get_buffer (vm, bi);
sctp_init_buffer (vm, b);
- sctp_prepare_shutdown_chunk (sctp_conn, b);
+ sctp_prepare_shutdown_chunk (sctp_conn, idx, b);
- u8 idx = sctp_pick_conn_idx_on_chunk (SHUTDOWN);
sctp_enqueue_to_output_now (vm, b, bi,
sctp_conn->sub_conn[idx].connection.is_ip4);
-
- /* Measure RTT with this */
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
}
/**
* Convert buffer to SHUTDOWN_ACK
*/
void
-sctp_prepare_shutdown_ack_chunk (sctp_connection_t * sctp_conn,
+sctp_prepare_shutdown_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b)
{
- u8 idx = sctp_pick_conn_idx_on_chunk (SHUTDOWN_ACK);
u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
/*
* Send SHUTDOWN_ACK
*/
void
-sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, vlib_buffer_t * b)
+sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b)
{
vlib_main_t *vm = vlib_get_main ();
sctp_reuse_buffer (vm, b);
- sctp_prepare_shutdown_ack_chunk (sctp_conn, b);
-
- u8 idx = sctp_pick_conn_idx_on_chunk (SHUTDOWN_ACK);
-
- /* Measure RTT with this */
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
+ sctp_prepare_shutdown_ack_chunk (sctp_conn, idx, b);
}
/**
* Convert buffer to SACK
*/
void
-sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, vlib_buffer_t * b)
+sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b)
{
vlib_main_t *vm = vlib_get_main ();
- u8 idx = sctp_pick_conn_idx_on_chunk (SACK);
sctp_reuse_buffer (vm, b);
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
/**
* Convert buffer to HEARTBEAT_ACK
*/
void
-sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn,
+sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b)
{
vlib_main_t *vm = vlib_get_main ();
- u8 idx = sctp_pick_conn_idx_on_chunk (HEARTBEAT_ACK);
u16 alloc_bytes = sizeof (sctp_hb_ack_chunk_t);
sctp_reuse_buffer (vm, b);
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
/**
* Convert buffer to HEARTBEAT
*/
void
-sctp_prepare_heartbeat_chunk (sctp_connection_t * sctp_conn,
+sctp_prepare_heartbeat_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b)
{
- u8 idx = sctp_pick_conn_idx_on_chunk (HEARTBEAT);
u16 alloc_bytes = sizeof (sctp_hb_req_chunk_t);
/* As per RFC 4960 the chunk_length value does NOT contemplate
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
void
sctp_main_t *tm = vnet_get_sctp_main ();
vlib_main_t *vm = vlib_get_main ();
- if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
- return;
+ u8 i;
+ u32 now = sctp_time_now ();
- b = vlib_get_buffer (vm, bi);
- sctp_init_buffer (vm, b);
- sctp_prepare_heartbeat_chunk (sctp_conn, b);
+ for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
+ {
+ if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
+ continue;
- u8 idx = sctp_pick_conn_idx_on_state (SCTP_STATE_ESTABLISHED);
- sctp_enqueue_to_output_now (vm, b, bi,
- sctp_conn->sub_conn[idx].connection.is_ip4);
+ if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL))
+ {
+ if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
+ return;
+
+ b = vlib_get_buffer (vm, bi);
+ sctp_init_buffer (vm, b);
+ sctp_prepare_heartbeat_chunk (sctp_conn, i, b);
+
+ sctp_enqueue_to_output_now (vm, b, bi,
+ sctp_conn->sub_conn[i].
+ connection.is_ip4);
- sctp_conn->sub_conn[idx].unacknowledged_hb += 1;
+ sctp_conn->sub_conn[i].unacknowledged_hb += 1;
+ }
+ }
}
/**
* Convert buffer to SHUTDOWN_COMPLETE
*/
void
-sctp_prepare_shutdown_complete_chunk (sctp_connection_t * sctp_conn,
+sctp_prepare_shutdown_complete_chunk (sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b)
{
- u8 idx = sctp_pick_conn_idx_on_chunk (SHUTDOWN_COMPLETE);
u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
void
-sctp_send_shutdown_complete (sctp_connection_t * sctp_conn)
+sctp_send_shutdown_complete (sctp_connection_t * sctp_conn, u8 idx,
+ vlib_buffer_t * b0)
{
- vlib_buffer_t *b;
- u32 bi;
- sctp_main_t *tm = vnet_get_sctp_main ();
vlib_main_t *vm = vlib_get_main ();
- if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
+ if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
return;
- b = vlib_get_buffer (vm, bi);
- sctp_init_buffer (vm, b);
- sctp_prepare_shutdown_complete_chunk (sctp_conn, b);
+ sctp_reuse_buffer (vm, b0);
- u8 idx = sctp_pick_conn_idx_on_chunk (SHUTDOWN_COMPLETE);
- sctp_enqueue_to_output (vm, b, bi,
- sctp_conn->sub_conn[idx].connection.is_ip4);
-
- sctp_conn->state = SCTP_STATE_CLOSED;
+ sctp_prepare_shutdown_complete_chunk (sctp_conn, idx, b0);
}
-
/*
* Send INIT
*/
return;
b = vlib_get_buffer (vm, bi);
- u8 idx = sctp_pick_conn_idx_on_chunk (INIT);
+ u8 idx = MAIN_SCTP_SUB_CONN_IDX;
sctp_init_buffer (vm, b);
- sctp_prepare_init_chunk (sctp_conn, b);
+ sctp_prepare_init_chunk (sctp_conn, idx, b);
sctp_push_ip_hdr (tm, &sctp_conn->sub_conn[idx], b);
sctp_enqueue_to_ip_lookup (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4);
- /* Measure RTT with this */
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
-
/* Start the T1_INIT timer */
sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT,
sctp_conn->sub_conn[idx].RTO);
/* Change state to COOKIE_WAIT */
sctp_conn->state = SCTP_STATE_COOKIE_WAIT;
+
+ /* Measure RTT with this */
+ sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
}
/**
* Push SCTP header and update connection variables
*/
static void
-sctp_push_hdr_i (sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
+sctp_push_hdr_i (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
sctp_state_t next_state)
{
u16 data_len =
sctp_payload_data_chunk_t *data_chunk =
vlib_buffer_push_uninit (b, bytes_to_add);
+ u8 idx = sctp_data_subconn_select (sctp_conn);
+ SCTP_DBG_OUTPUT
+ ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u",
+ sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index,
+ sctp_conn->sub_conn[idx].connection.c_index,
+ sctp_conn->sub_conn[idx].connection.lcl_port,
+ sctp_conn->sub_conn[idx].connection.rmt_port);
data_chunk->sctp_hdr.checksum = 0;
data_chunk->sctp_hdr.src_port =
sctp_conn->sub_conn[idx].connection.lcl_port;
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;
sctp_conn->next_tsn += data_len;
+ u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn;
+ /* Section 7.2.2; point (3) */
+ if (sctp_conn->sub_conn[idx].partially_acked_bytes >=
+ sctp_conn->sub_conn[idx].cwnd
+ && inflight >= sctp_conn->sub_conn[idx].cwnd)
+ {
+ sctp_conn->sub_conn[idx].cwnd += sctp_conn->sub_conn[idx].PMTU;
+ sctp_conn->sub_conn[idx].partially_acked_bytes -=
+ sctp_conn->sub_conn[idx].cwnd;
+ }
+
+ sctp_conn->sub_conn[idx].last_data_ts = sctp_time_now ();
+
vnet_buffer (b)->sctp.connection_index =
sctp_conn->sub_conn[idx].connection.c_index;
+
+ vnet_buffer (b)->sctp.subconn_idx = idx;
}
u32
sctp_connection_t *sctp_conn =
sctp_get_connection_from_transport (trans_conn);
- u8 idx = sctp_pick_conn_idx_on_chunk (DATA);
+ SCTP_DBG_OUTPUT ("TRANS_CONN = %p, SCTP_CONN = %p, "
+ "S_INDEX = %u, C_INDEX = %u,"
+ "trans_conn->LCL_PORT = %u, trans_conn->RMT_PORT = %u",
+ trans_conn,
+ sctp_conn,
+ trans_conn->s_index,
+ trans_conn->c_index,
+ trans_conn->lcl_port, trans_conn->rmt_port);
- if (sctp_conn->sub_conn[idx].unacknowledged_hb >
- SCTP_ASSOCIATION_MAX_RETRANS)
- {
- // The remote-peer is considered to be unreachable hence shutting down
+ sctp_push_hdr_i (sctp_conn, b, SCTP_STATE_ESTABLISHED);
- /* Start cleanup. App wasn't notified yet so use delete notify as
- * opposed to delete to cleanup session layer state. */
- stream_session_delete_notify (&sctp_conn->sub_conn
- [MAIN_SCTP_SUB_CONN_IDX].connection);
-
- sctp_connection_timers_reset (sctp_conn);
-
- sctp_connection_cleanup (sctp_conn);
- }
+ sctp_trajectory_add_start (b0, 3);
- sctp_push_hdr_i (sctp_conn, idx, b, SCTP_STATE_ESTABLISHED);
+ return 0;
+}
- if (sctp_conn->sub_conn[idx].RTO_pending == 0)
+#if SCTP_DEBUG_STATE_MACHINE
+always_inline u8
+sctp_validate_output_state_machine (sctp_connection_t * sctp_conn,
+ u8 chunk_type)
+{
+ u8 result = 0;
+ switch (sctp_conn->state)
{
- sctp_conn->sub_conn[idx].RTO_pending = 1;
- sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
+ case SCTP_STATE_CLOSED:
+ if (chunk_type != INIT && chunk_type != INIT_ACK)
+ result = 1;
+ break;
+ case SCTP_STATE_ESTABLISHED:
+ if (chunk_type != DATA && chunk_type != HEARTBEAT &&
+ chunk_type != HEARTBEAT_ACK && chunk_type != SACK &&
+ chunk_type != COOKIE_ACK && chunk_type != SHUTDOWN)
+ result = 1;
+ break;
+ case SCTP_STATE_COOKIE_WAIT:
+ if (chunk_type != COOKIE_ECHO)
+ result = 1;
+ break;
+ case SCTP_STATE_SHUTDOWN_SENT:
+ if (chunk_type != SHUTDOWN_COMPLETE)
+ result = 1;
+ break;
+ case SCTP_STATE_SHUTDOWN_RECEIVED:
+ if (chunk_type != SHUTDOWN_ACK)
+ result = 1;
+ break;
}
+ return result;
+}
+#endif
- sctp_trajectory_add_start (b0, 3);
-
- return 0;
-
+always_inline u8
+sctp_is_retransmitting (sctp_connection_t * sctp_conn, u8 idx)
+{
+ return sctp_conn->sub_conn[idx].is_retransmitting;
}
always_inline uword
goto done;
}
- u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
+ u8 idx = vnet_buffer (b0)->sctp.subconn_idx;
th0 = vlib_buffer_get_current (b0);
#endif
}
+ sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
+ u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
+ if (chunk_type >= UNKNOWN)
+ {
+ clib_warning
+ ("Trying to send an unrecognized chunk... something is really bad.");
+ error0 = SCTP_ERROR_UNKOWN_CHUNK;
+ next0 = SCTP_OUTPUT_NEXT_DROP;
+ goto done;
+ }
+
+#if SCTP_DEBUG_STATE_MACHINE
u8 is_valid =
(sctp_conn->sub_conn[idx].connection.lcl_port ==
sctp_hdr->src_port
|| sctp_conn->sub_conn[idx].connection.rmt_port ==
sctp_hdr->src_port);
- sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
- u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
-
if (!is_valid)
{
SCTP_DBG_STATE_MACHINE ("BUFFER IS INCORRECT: conn_index = %u, "
"chunk_type = %u [%s], "
"connection.lcl_port = %u, sctp_hdr->src_port = %u, "
"connection.rmt_port = %u, sctp_hdr->dst_port = %u",
- sctp_conn->sub_conn
- [idx].connection.c_index, packet_length,
+ sctp_conn->sub_conn[idx].
+ connection.c_index, packet_length,
chunk_type,
sctp_chunk_to_string (chunk_type),
sctp_conn->sub_conn[idx].
next0 = SCTP_OUTPUT_NEXT_DROP;
goto done;
}
-
+#endif
SCTP_DBG_STATE_MACHINE
- ("CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
+ ("SESSION_INDEX = %u, CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
"CHUNK_TYPE = %s, " "SRC_PORT = %u, DST_PORT = %u",
+ sctp_conn->sub_conn[idx].connection.s_index,
sctp_conn->sub_conn[idx].connection.c_index,
sctp_conn->state, sctp_state_to_string (sctp_conn->state),
sctp_chunk_to_string (chunk_type), full_hdr->hdr.src_port,
full_hdr->hdr.dst_port);
- if (chunk_type == DATA)
- SCTP_ADV_DBG_OUTPUT ("PACKET_LENGTH = %u", packet_length);
-
/* Let's make sure the state-machine does not send anything crazy */
- switch (sctp_conn->state)
+#if SCTP_DEBUG_STATE_MACHINE
+ if (sctp_validate_output_state_machine (sctp_conn, chunk_type) != 0)
{
- case SCTP_STATE_CLOSED:
- {
- if (chunk_type != INIT && chunk_type != INIT_ACK)
- {
- SCTP_DBG_STATE_MACHINE
- ("Sending the wrong chunk (%s) based on state-machine status (%s)",
- sctp_chunk_to_string (chunk_type),
- sctp_state_to_string (sctp_conn->state));
-
- error0 = SCTP_ERROR_UNKOWN_CHUNK;
- next0 = SCTP_OUTPUT_NEXT_DROP;
- goto done;
- }
- break;
- }
- case SCTP_STATE_ESTABLISHED:
- if (chunk_type != DATA && chunk_type != HEARTBEAT &&
- chunk_type != HEARTBEAT_ACK && chunk_type != SACK &&
- chunk_type != COOKIE_ACK && chunk_type != SHUTDOWN)
- {
- SCTP_DBG_STATE_MACHINE
- ("Sending the wrong chunk (%s) based on state-machine status (%s)",
- sctp_chunk_to_string (chunk_type),
- sctp_state_to_string (sctp_conn->state));
-
- error0 = SCTP_ERROR_UNKOWN_CHUNK;
- next0 = SCTP_OUTPUT_NEXT_DROP;
- goto done;
- }
- break;
- case SCTP_STATE_COOKIE_WAIT:
- if (chunk_type != COOKIE_ECHO)
- {
- SCTP_DBG_STATE_MACHINE
- ("Sending the wrong chunk (%s) based on state-machine status (%s)",
- sctp_chunk_to_string (chunk_type),
- sctp_state_to_string (sctp_conn->state));
-
- error0 = SCTP_ERROR_UNKOWN_CHUNK;
- next0 = SCTP_OUTPUT_NEXT_DROP;
- goto done;
- }
- /* Change state */
- sctp_conn->state = SCTP_STATE_COOKIE_ECHOED;
- break;
- case SCTP_STATE_SHUTDOWN_SENT:
- if (chunk_type != SHUTDOWN_COMPLETE)
- {
- SCTP_DBG_STATE_MACHINE
- ("Sending the wrong chunk (%s) based on state-machine status (%s)",
- sctp_chunk_to_string (chunk_type),
- sctp_state_to_string (sctp_conn->state));
-
- error0 = SCTP_ERROR_UNKOWN_CHUNK;
- next0 = SCTP_OUTPUT_NEXT_DROP;
- goto done;
- }
- case SCTP_STATE_SHUTDOWN_RECEIVED:
- if (chunk_type != SHUTDOWN_ACK)
- {
- SCTP_DBG_STATE_MACHINE
- ("Sending the wrong chunk (%s) based on state-machine status (%s)",
- sctp_chunk_to_string (chunk_type),
- sctp_state_to_string (sctp_conn->state));
-
- error0 = SCTP_ERROR_UNKOWN_CHUNK;
- next0 = SCTP_OUTPUT_NEXT_DROP;
- goto done;
- }
- default:
SCTP_DBG_STATE_MACHINE
- ("Sending chunk (%s) based on state-machine status (%s)",
+ ("Sending the wrong chunk (%s) based on state-machine status (%s)",
sctp_chunk_to_string (chunk_type),
sctp_state_to_string (sctp_conn->state));
- break;
+
+ error0 = SCTP_ERROR_UNKOWN_CHUNK;
+ next0 = SCTP_OUTPUT_NEXT_DROP;
+ goto done;
+
+ }
+#endif
+
+ /* Karn's algorithm: RTT measurements MUST NOT be made using
+ * packets that were retransmitted
+ */
+ if (!sctp_is_retransmitting (sctp_conn, idx))
+ {
+ /* Measure RTT with this */
+ if (chunk_type == DATA
+ && sctp_conn->sub_conn[idx].RTO_pending == 0)
+ {
+ sctp_conn->sub_conn[idx].RTO_pending = 1;
+ sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
+ }
+ else
+ sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
}
+ /* Let's take care of TIMERS */
switch (chunk_type)
{
+ case COOKIE_ECHO:
+ {
+ sctp_conn->state = SCTP_STATE_COOKIE_ECHOED;
+ break;
+ }
case DATA:
{
+ SCTP_ADV_DBG_OUTPUT ("PACKET_LENGTH = %u", packet_length);
+
sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
sctp_conn->sub_conn[idx].RTO);
break;
sctp_conn->state = SCTP_STATE_SHUTDOWN_ACK_SENT;
break;
}
+ case SHUTDOWN_COMPLETE:
+ {
+ sctp_conn->state = SCTP_STATE_CLOSED;
+ break;
+ }
}
vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
- SCTP_DBG_STATE_MACHINE ("CONNECTION_INDEX = %u, "
- "NEW_STATE = %s, "
- "CHUNK_SENT = %s",
- sctp_conn->sub_conn[idx].connection.c_index,
- sctp_state_to_string (sctp_conn->state),
- sctp_chunk_to_string (chunk_type));
+ SCTP_DBG_STATE_MACHINE
+ ("SESSION_INDEX = %u, CONNECTION_INDEX = %u, " "NEW_STATE = %s, "
+ "CHUNK_SENT = %s", sctp_conn->sub_conn[idx].connection.s_index,
+ sctp_conn->sub_conn[idx].connection.c_index,
+ sctp_state_to_string (sctp_conn->state),
+ sctp_chunk_to_string (chunk_type));
vnet_sctp_common_hdr_params_host_to_net (&full_hdr->common_hdr);