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gerrit.nordix.org / fdio / vpp / 3c6a976325f32f880b7e53f50ebe86fa0e8476c9 / . / src / vnet / sctp / sctp_input.c
blob: 00d0a61feff1fa23ee79597d52a31a88821d621a [file] [log] [blame]
/*
* Copyright (c) 2017 SUSE LLC.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vppinfra/sparse_vec.h>
#include <vnet/sctp/sctp.h>
#include <vnet/sctp/sctp_packet.h>
#include <vnet/sctp/sctp_debug.h>
#include <vnet/session/session.h>
#include <math.h>
static char *sctp_error_strings[] = {
#define sctp_error(n,s) s,
#include <vnet/sctp/sctp_error.def>
#undef sctp_error
};
/* All SCTP nodes have the same outgoing arcs */
#define foreach_sctp_state_next \
_ (DROP4, "ip4-drop") \
_ (DROP6, "ip6-drop") \
_ (SCTP4_OUTPUT, "sctp4-output") \
_ (SCTP6_OUTPUT, "sctp6-output")
typedef enum _sctp_established_phase_next
{
#define _(s,n) SCTP_ESTABLISHED_PHASE_NEXT_##s,
foreach_sctp_state_next
#undef _
SCTP_ESTABLISHED_PHASE_N_NEXT,
} sctp_established_phase_next_t;
typedef enum _sctp_rcv_phase_next
{
#define _(s,n) SCTP_RCV_PHASE_NEXT_##s,
foreach_sctp_state_next
#undef _
SCTP_RCV_PHASE_N_NEXT,
} sctp_rcv_phase_next_t;
typedef enum _sctp_listen_phase_next
{
#define _(s,n) SCTP_LISTEN_PHASE_NEXT_##s,
foreach_sctp_state_next
#undef _
SCTP_LISTEN_PHASE_N_NEXT,
} sctp_listen_phase_next_t;
typedef enum _sctp_shutdown_phase_next
{
#define _(s,n) SCTP_SHUTDOWN_PHASE_NEXT_##s,
foreach_sctp_state_next
#undef _
SCTP_SHUTDOWN_PHASE_N_NEXT,
} sctp_shutdown_phase_next_t;
/* Generic, state independent indices */
typedef enum _sctp_state_next
{
#define _(s,n) SCTP_NEXT_##s,
foreach_sctp_state_next
#undef _
SCTP_STATE_N_NEXT,
} sctp_state_next_t;
typedef enum _sctp_input_next
{
SCTP_INPUT_NEXT_DROP,
SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_INPUT_NEXT_RCV_PHASE,
SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_INPUT_NEXT_PUNT_PHASE,
SCTP_INPUT_N_NEXT
} sctp_input_next_t;
char *
phase_to_string (u8 phase)
{
switch (phase)
{
case SCTP_INPUT_NEXT_DROP:
return "SCTP_INPUT_NEXT_DROP";
case SCTP_INPUT_NEXT_LISTEN_PHASE:
return "SCTP_INPUT_NEXT_LISTEN_PHASE";
case SCTP_INPUT_NEXT_RCV_PHASE:
return "SCTP_INPUT_NEXT_RCV_PHASE";
case SCTP_INPUT_NEXT_ESTABLISHED_PHASE:
return "SCTP_INPUT_NEXT_ESTABLISHED_PHASE";
case SCTP_INPUT_NEXT_SHUTDOWN_PHASE:
return "SCTP_INPUT_NEXT_SHUTDOWN_PHASE";
case SCTP_INPUT_NEXT_PUNT_PHASE:
return "SCTP_INPUT_NEXT_PUNT_PHASE";
}
return NULL;
}
#define foreach_sctp4_input_next \
_ (DROP, "error-drop") \
_ (RCV_PHASE, "sctp4-rcv") \
_ (LISTEN_PHASE, "sctp4-listen") \
_ (ESTABLISHED_PHASE, "sctp4-established") \
_ (SHUTDOWN_PHASE, "sctp4-shutdown") \
_ (PUNT_PHASE, "ip4-punt")
#define foreach_sctp6_input_next \
_ (DROP, "error-drop") \
_ (RCV_PHASE, "sctp6-rcv") \
_ (LISTEN_PHASE, "sctp6-listen") \
_ (ESTABLISHED_PHASE, "sctp6-established") \
_ (SHUTDOWN_PHASE, "sctp6-shutdown") \
_ (PUNT_PHASE, "ip6-punt")
static u8
sctp_lookup_is_valid (transport_connection_t * trans_conn,
sctp_header_t * sctp_hdr)
{
sctp_connection_t *sctp_conn =
sctp_get_connection_from_transport (trans_conn);
if (!sctp_conn)
return 1;
u8 is_valid = (trans_conn->lcl_port == sctp_hdr->dst_port
&& (sctp_conn->state == SCTP_STATE_CLOSED
|| trans_conn->rmt_port == sctp_hdr->src_port));
return is_valid;
}
/**
* Lookup transport connection
*/
static sctp_connection_t *
sctp_lookup_connection (u32 fib_index, vlib_buffer_t * b, u8 thread_index,
u8 is_ip4)
{
sctp_main_t *tm = vnet_get_sctp_main ();
sctp_header_t *sctp_hdr;
transport_connection_t *trans_conn;
sctp_connection_t *sctp_conn;
u8 is_filtered, i;
if (is_ip4)
{
ip4_header_t *ip4_hdr;
ip4_hdr = vlib_buffer_get_current (b);
sctp_hdr = ip4_next_header (ip4_hdr);
trans_conn = session_lookup_connection_wt4 (fib_index,
&ip4_hdr->dst_address,
&ip4_hdr->src_address,
sctp_hdr->dst_port,
sctp_hdr->src_port,
TRANSPORT_PROTO_SCTP,
thread_index, &is_filtered);
if (trans_conn == 0) /* Not primary connection */
{
for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
{
if ((tm->connections[thread_index]->sub_conn[i].
connection.lcl_ip.ip4.as_u32 ==
ip4_hdr->dst_address.as_u32)
&& (tm->connections[thread_index]->sub_conn[i].
connection.rmt_ip.ip4.as_u32 ==
ip4_hdr->src_address.as_u32))
{
trans_conn =
&tm->connections[thread_index]->sub_conn[i].connection;
break;
}
}
}
ASSERT (trans_conn != 0);
ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
}
else
{
ip6_header_t *ip6_hdr;
ip6_hdr = vlib_buffer_get_current (b);
sctp_hdr = ip6_next_header (ip6_hdr);
trans_conn = session_lookup_connection_wt6 (fib_index,
&ip6_hdr->dst_address,
&ip6_hdr->src_address,
sctp_hdr->dst_port,
sctp_hdr->src_port,
TRANSPORT_PROTO_SCTP,
thread_index, &is_filtered);
if (trans_conn == 0) /* Not primary connection */
{
for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
{
if ((tm->connections[thread_index]->sub_conn[i].
connection.lcl_ip.ip6.as_u64[0] ==
ip6_hdr->dst_address.as_u64[0]
&& tm->connections[thread_index]->sub_conn[i].
connection.lcl_ip.ip6.as_u64[1] ==
ip6_hdr->dst_address.as_u64[1])
&& (tm->connections[thread_index]->sub_conn[i].
connection.rmt_ip.ip6.as_u64[0] ==
ip6_hdr->src_address.as_u64[0]
&& tm->connections[thread_index]->
sub_conn[i].connection.rmt_ip.ip6.as_u64[1] ==
ip6_hdr->src_address.as_u64[1]))
{
trans_conn =
&tm->connections[thread_index]->sub_conn[i].connection;
break;
}
}
}
ASSERT (trans_conn != 0);
ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
}
sctp_conn = sctp_get_connection_from_transport (trans_conn);
return sctp_conn;
}
typedef struct
{
sctp_header_t sctp_header;
sctp_connection_t sctp_connection;
} sctp_rx_trace_t;
#define sctp_next_output(is_ip4) (is_ip4 ? SCTP_NEXT_SCTP4_OUTPUT \
: SCTP_NEXT_SCTP6_OUTPUT)
#define sctp_next_drop(is_ip4) (is_ip4 ? SCTP_NEXT_DROP4 \
: SCTP_NEXT_DROP6)
void
sctp_set_rx_trace_data (sctp_rx_trace_t * rx_trace,
sctp_connection_t * sctp_conn,
sctp_header_t * sctp_hdr, vlib_buffer_t * b0,
u8 is_ip4)
{
if (sctp_conn)
{
clib_memcpy (&rx_trace->sctp_connection, sctp_conn,
sizeof (rx_trace->sctp_connection));
}
else
{
sctp_hdr = sctp_buffer_hdr (b0);
}
clib_memcpy (&rx_trace->sctp_header, sctp_hdr,
sizeof (rx_trace->sctp_header));
}
always_inline u16
sctp_calculate_implied_length (ip4_header_t * ip4_hdr, ip6_header_t * ip6_hdr,
int is_ip4)
{
u16 sctp_implied_packet_length = 0;
if (is_ip4)
sctp_implied_packet_length =
clib_net_to_host_u16 (ip4_hdr->length) - ip4_header_bytes (ip4_hdr);
else
sctp_implied_packet_length =
clib_net_to_host_u16 (ip6_hdr->payload_length) - sizeof (ip6_hdr);
return sctp_implied_packet_length;
}
always_inline u8
sctp_is_bundling (u16 sctp_implied_length,
sctp_chunks_common_hdr_t * sctp_common_hdr)
{
if (sctp_implied_length !=
sizeof (sctp_header_t) + vnet_sctp_get_chunk_length (sctp_common_hdr))
return 1;
return 0;
}
always_inline u16
sctp_handle_operation_err (sctp_header_t * sctp_hdr,
sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b, u16 * next0)
{
sctp_operation_error_t *op_err = (sctp_operation_error_t *) sctp_hdr;
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sctp_hdr->verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
if (clib_net_to_host_u16 (op_err->err_causes[0].param_hdr.type) ==
STALE_COOKIE_ERROR)
{
if (sctp_conn->state != SCTP_STATE_COOKIE_ECHOED)
*next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
else
{
sctp_connection_cleanup (sctp_conn);
stream_session_disconnect_notify (&sctp_conn->
sub_conn[idx].connection);
}
}
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_handle_init (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_init_chunk_t *init_chunk = (sctp_init_chunk_t *) (sctp_hdr);
ip4_address_t *ip4_addr = 0;
ip6_address_t *ip6_addr = 0;
char hostname[FQDN_MAX_LENGTH];
/* Check the current state of the connection
*
* The logic required by the RFC4960 Section 5.2.2 is already taken care of
* in the code below and by the "sctp_prepare_initack_chunk" function.
* However, for debugging purposes it is nice to have a message printed out
* for these corner-case scenarios.
*/
if (sctp_conn->state != SCTP_STATE_CLOSED)
{ /* UNEXPECTED scenario */
switch (sctp_conn->state)
{
case SCTP_STATE_COOKIE_WAIT:
SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
sctp_prepare_initack_chunk_for_collision (sctp_conn,
MAIN_SCTP_SUB_CONN_IDX,
b0, ip4_addr, ip6_addr);
return SCTP_ERROR_NONE;
case SCTP_STATE_COOKIE_ECHOED:
case SCTP_STATE_SHUTDOWN_ACK_SENT:
SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_ECHOED state");
if (sctp_conn->forming_association_changed == 0)
sctp_prepare_initack_chunk_for_collision (sctp_conn,
MAIN_SCTP_SUB_CONN_IDX,
b0, ip4_addr, ip6_addr);
else
sctp_prepare_abort_for_collision (sctp_conn,
MAIN_SCTP_SUB_CONN_IDX, b0,
ip4_addr, ip6_addr);
return SCTP_ERROR_NONE;
}
}
if (sctp_hdr->verification_tag != 0x0)
return SCTP_ERROR_INVALID_TAG_FOR_INIT;
/*
* It is not possible to bundle any other CHUNK with the INIT chunk
*/
if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr))
return SCTP_ERROR_BUNDLING_VIOLATION;
/* Save the INITIATE_TAG of the remote peer for this connection:
* it MUST be used for the VERIFICATION_TAG parameter in the SCTP HEADER */
sctp_conn->remote_tag = init_chunk->initiate_tag;
sctp_conn->remote_initial_tsn =
clib_net_to_host_u32 (init_chunk->initial_tsn);
sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
sctp_conn->remote_initial_tsn);
sctp_conn->snd_opts.a_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.
*/
u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
if (length > sizeof (sctp_init_chunk_t))
{
/* There are optional parameters in the INIT chunk */
u16 pointer_offset = sizeof (sctp_init_chunk_t);
while (pointer_offset < length)
{
sctp_opt_params_hdr_t *opt_params_hdr =
(sctp_opt_params_hdr_t *) init_chunk + pointer_offset;
switch (clib_net_to_host_u16 (opt_params_hdr->type))
{
case SCTP_IPV4_ADDRESS_TYPE:
{
sctp_ipv4_addr_param_t *ipv4 =
(sctp_ipv4_addr_param_t *) opt_params_hdr;
clib_memcpy (ip4_addr, &ipv4->address,
sizeof (ip4_address_t));
sctp_sub_connection_add_ip4 (vlib_get_main (),
&sctp_conn->sub_conn
[MAIN_SCTP_SUB_CONN_IDX].connection.
lcl_ip.ip4, &ipv4->address);
break;
}
case SCTP_IPV6_ADDRESS_TYPE:
{
sctp_ipv6_addr_param_t *ipv6 =
(sctp_ipv6_addr_param_t *) opt_params_hdr;
clib_memcpy (ip6_addr, &ipv6->address,
sizeof (ip6_address_t));
sctp_sub_connection_add_ip6 (vlib_get_main (),
&sctp_conn->sub_conn
[MAIN_SCTP_SUB_CONN_IDX].connection.
lcl_ip.ip6, &ipv6->address);
break;
}
case SCTP_COOKIE_PRESERVATIVE_TYPE:
{
sctp_cookie_preservative_param_t *cookie_pres =
(sctp_cookie_preservative_param_t *) opt_params_hdr;
sctp_conn->peer_cookie_life_span_increment =
cookie_pres->life_span_inc;
break;
}
case SCTP_HOSTNAME_ADDRESS_TYPE:
{
sctp_hostname_param_t *hostname_addr =
(sctp_hostname_param_t *) opt_params_hdr;
clib_memcpy (hostname, hostname_addr->hostname,
FQDN_MAX_LENGTH);
break;
}
case SCTP_SUPPORTED_ADDRESS_TYPES:
{
/* TODO */
break;
}
}
pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length);
}
}
/* Reuse buffer to make init-ack and send */
sctp_prepare_initack_chunk (sctp_conn, MAIN_SCTP_SUB_CONN_IDX, b0, ip4_addr,
ip6_addr);
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_is_valid_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_init_ack_chunk_t *init_ack_chunk =
(sctp_init_ack_chunk_t *) (sctp_hdr);
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
/*
* It is not possible to bundle any other CHUNK with the INIT_ACK chunk
*/
if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
return SCTP_ERROR_BUNDLING_VIOLATION;
return SCTP_ERROR_NONE;
}
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, 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);
sctp_state_cookie_param_t state_cookie;
char hostname[FQDN_MAX_LENGTH];
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
/*
* It is not possible to bundle any other CHUNK with the INIT chunk
*/
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 =
clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
sctp_conn->remote_initial_tsn);
sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
if (length > sizeof (sctp_init_ack_chunk_t))
/*
* There are optional parameters in the INIT ACK chunk
*/
{
u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
while (pointer_offset < length)
{
sctp_opt_params_hdr_t *opt_params_hdr =
(sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
pointer_offset);
switch (clib_net_to_host_u16 (opt_params_hdr->type))
{
case SCTP_IPV4_ADDRESS_TYPE:
{
sctp_ipv4_addr_param_t *ipv4 =
(sctp_ipv4_addr_param_t *) opt_params_hdr;
sctp_sub_connection_add_ip4 (vlib_get_main (),
&sctp_conn->sub_conn
[MAIN_SCTP_SUB_CONN_IDX].connection.
lcl_ip.ip4, &ipv4->address);
break;
}
case SCTP_IPV6_ADDRESS_TYPE:
{
sctp_ipv6_addr_param_t *ipv6 =
(sctp_ipv6_addr_param_t *) opt_params_hdr;
sctp_sub_connection_add_ip6 (vlib_get_main (),
&sctp_conn->sub_conn
[MAIN_SCTP_SUB_CONN_IDX].connection.
lcl_ip.ip6, &ipv6->address);
break;
}
case SCTP_STATE_COOKIE_TYPE:
{
sctp_state_cookie_param_t *state_cookie_param =
(sctp_state_cookie_param_t *) opt_params_hdr;
clib_memcpy (&state_cookie, state_cookie_param,
sizeof (sctp_state_cookie_param_t));
break;
}
case SCTP_HOSTNAME_ADDRESS_TYPE:
{
sctp_hostname_param_t *hostname_addr =
(sctp_hostname_param_t *) opt_params_hdr;
clib_memcpy (hostname, hostname_addr->hostname,
FQDN_MAX_LENGTH);
break;
}
case SCTP_UNRECOGNIZED_TYPE:
{
break;
}
}
u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
/* This indicates something really bad happened */
if (increment == 0)
{
return SCTP_ERROR_INVALID_TAG;
}
pointer_offset += increment;
}
}
sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, &state_cookie);
/* Start the T1_COOKIE timer */
sctp_timer_set (sctp_conn, idx,
SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
return SCTP_ERROR_NONE;
}
/** Enqueue data out-of-order for delivery to application */
always_inline int
sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
vlib_buffer_t * b, u16 data_len, u8 conn_idx)
{
int written, error = SCTP_ERROR_ENQUEUED;
written =
session_enqueue_stream_connection (&sctp_conn->
sub_conn[conn_idx].connection, b, 0,
1 /* queue event */ ,
0);
/* Update next_tsn_expected */
if (PREDICT_TRUE (written == data_len))
{
sctp_conn->next_tsn_expected += written;
SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
sctp_conn->sub_conn[conn_idx].connection.c_index,
written, data_len);
}
/* If more data written than expected, account for out-of-order bytes. */
else if (written > data_len)
{
sctp_conn->next_tsn_expected += written;
SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
sctp_conn->sub_conn[conn_idx].connection.c_index,
written, data_len);
}
else if (written > 0)
{
/* We've written something but FIFO is probably full now */
sctp_conn->next_tsn_expected += written;
error = SCTP_ERROR_PARTIALLY_ENQUEUED;
SCTP_ADV_DBG
("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
sctp_conn->sub_conn[conn_idx].connection.c_index, written);
}
else
{
SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
sctp_conn->sub_conn[conn_idx].connection.c_index);
return SCTP_ERROR_FIFO_FULL;
}
/* TODO: Update out_of_order_map & SACK list */
return error;
}
/** Enqueue data for delivery to application */
always_inline int
sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
u16 data_len, u8 conn_idx)
{
int written, error = SCTP_ERROR_ENQUEUED;
written =
session_enqueue_stream_connection (&sctp_conn->
sub_conn[conn_idx].connection, b, 0,
1 /* queue event */ ,
1);
/* Update next_tsn_expected */
if (PREDICT_TRUE (written == data_len))
{
sctp_conn->next_tsn_expected += written;
SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
sctp_conn->sub_conn[conn_idx].connection.c_index,
written, data_len);
}
/* If more data written than expected, account for out-of-order bytes. */
else if (written > data_len)
{
sctp_conn->next_tsn_expected += written;
SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
sctp_conn->sub_conn[conn_idx].connection.c_index,
written, data_len);
}
else if (written > 0)
{
/* We've written something but FIFO is probably full now */
sctp_conn->next_tsn_expected += written;
error = SCTP_ERROR_PARTIALLY_ENQUEUED;
SCTP_ADV_DBG
("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
sctp_conn->sub_conn[conn_idx].connection.c_index, written);
}
else
{
SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
sctp_conn->sub_conn[conn_idx].connection.c_index);
return SCTP_ERROR_FIFO_FULL;
}
return error;
}
always_inline u8
sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
{
if (is_gapping != 0)
{
SCTP_CONN_TRACKING_DBG
("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
return 0;
}
if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
{
SCTP_CONN_TRACKING_DBG
("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
return 0;
}
sctp_conn->ack_state += 1;
return 1;
}
always_inline void
sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
u8 * gapping)
{
if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
{
SCTP_CONN_TRACKING_DBG
("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index,
sctp_conn->next_tsn_expected, tsn,
sctp_conn->next_tsn_expected - tsn);
*gapping = 1;
}
}
always_inline u16
sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
u16 * next0)
{
u32 error = 0, n_data_bytes;
u8 is_gapping = 0;
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
n_data_bytes = vnet_buffer (b)->sctp.data_len;
ASSERT (n_data_bytes);
sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
sctp_conn->last_rcvd_tsn = tsn;
SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
if (bbit == 1 && ebit == 1) /* Unfragmented message */
{
/* In order data, enqueue. Fifo figures out by itself if any out-of-order
* segments can be enqueued after fifo tail offset changes. */
if (PREDICT_FALSE (is_gapping == 1))
error =
sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
else
error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
}
else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
{
error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
}
else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
{
if (PREDICT_FALSE (is_gapping == 1))
error =
sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
else
error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
}
else /* Middle piece of a fragmented user message */
{
if (PREDICT_FALSE (is_gapping == 1))
error =
sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
else
error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
}
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);
sctp_conn->sub_conn[idx].enqueue_state = error;
return error;
}
always_inline u16
sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
sctp_chunks_common_hdr_t * sctp_chunk_hdr,
sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b0, u16 * next0)
{
u32 now = sctp_time_now ();
sctp_cookie_echo_chunk_t *cookie_echo =
(sctp_cookie_echo_chunk_t *) sctp_hdr;
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sctp_hdr->verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
sctp_calculate_rto (sctp_conn, idx);
u32 creation_time =
clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
u32 cookie_lifespan =
clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
if (now > creation_time + cookie_lifespan)
{
SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
now, creation_time, cookie_lifespan);
return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
}
sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0);
/* Change state */
sctp_conn->state = SCTP_STATE_ESTABLISHED;
sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
*next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
sctp_conn->sub_conn[idx].RTO);
stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
sctp_chunks_common_hdr_t * sctp_chunk_hdr,
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 != sctp_hdr->verification_tag)
{
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;
sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
*next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
sctp_conn->sub_conn[idx].RTO);
stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
return SCTP_ERROR_NONE;
}
always_inline uword
sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
{
sctp_main_t *tm = vnet_get_sctp_main ();
u32 n_left_from, next_index, *from, *to_next;
u32 my_thread_index = vm->thread_index;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
vlib_buffer_t *b0;
sctp_header_t *sctp_hdr = 0;
sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
ip4_header_t *ip4_hdr = 0;
ip6_header_t *ip6_hdr = 0;
sctp_connection_t *sctp_conn, *new_sctp_conn;
u16 sctp_implied_length = 0;
u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4);
u8 idx;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
/* If we are in SCTP_COOKIE_WAIT_STATE then the connection
* will come from the half-open connections pool.
*/
sctp_conn =
sctp_half_open_connection_get (vnet_buffer (b0)->
sctp.connection_index);
if (PREDICT_FALSE (sctp_conn == 0))
{
SCTP_ADV_DBG
("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
error0 = SCTP_ERROR_INVALID_CONNECTION;
goto drop;
}
if (is_ip4)
{
ip4_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip4_next_header (ip4_hdr);
idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
}
else
{
ip6_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip6_next_header (ip6_hdr);
idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
}
sctp_conn->sub_conn[idx].subconn_idx = idx;
sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
sctp_chunk_hdr =
(sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
sctp_implied_length =
sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
switch (chunk_type)
{
case INIT_ACK:
error0 =
sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
b0, sctp_implied_length);
if (error0 == SCTP_ERROR_NONE)
{
pool_get (tm->connections[my_thread_index], new_sctp_conn);
clib_memcpy (new_sctp_conn, sctp_conn,
sizeof (*new_sctp_conn));
new_sctp_conn->sub_conn[idx].c_c_index =
new_sctp_conn - tm->connections[my_thread_index];
new_sctp_conn->sub_conn[idx].c_thread_index =
my_thread_index;
new_sctp_conn->sub_conn[idx].PMTU =
sctp_conn->sub_conn[idx].PMTU;
new_sctp_conn->sub_conn[idx].subconn_idx = idx;
if (sctp_half_open_connection_cleanup (sctp_conn))
{
SCTP_DBG
("Cannot cleanup half-open connection; not the owning thread");
}
sctp_connection_timers_init (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))
{
SCTP_DBG
("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
new_sctp_conn->sub_conn[idx].connection.c_index);
sctp_connection_cleanup (new_sctp_conn);
goto drop;
}
next0 = sctp_next_output (is_ip4);
}
break;
case OPERATION_ERROR:
error0 =
sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
&next0);
break;
/* All UNEXPECTED scenarios (wrong chunk received per state-machine)
* are handled by the input-dispatcher function using the table-lookup
* hence we should never get to the "default" case below.
*/
default:
error0 = SCTP_ERROR_UNKOWN_CHUNK;
next0 = sctp_next_drop (is_ip4);
goto drop;
}
if (error0 != SCTP_ERROR_NONE)
{
clib_warning ("error while parsing chunk");
sctp_connection_cleanup (sctp_conn);
next0 = sctp_next_drop (is_ip4);
goto drop;
}
drop:
b0->error = node->errors[error0];
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
sctp_rx_trace_t *t0 =
vlib_add_trace (vm, node, b0, sizeof (*t0));
sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return from_frame->n_vectors;
}
static uword
sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
}
static uword
sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
}
u8 *
format_sctp_rx_trace_short (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
s = format (s, "%d -> %d (%U)",
clib_net_to_host_u16 (t->sctp_header.src_port),
clib_net_to_host_u16 (t->sctp_header.dst_port),
format_sctp_state, t->sctp_connection.state);
return s;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
{
.function = sctp4_rcv_phase,
.name = "sctp4-rcv",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp6_init_phase_node) =
{
.function = sctp6_rcv_phase,
.name = "sctp6-rcv",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
vlib_node_registration_t sctp4_shutdown_phase_node;
vlib_node_registration_t sctp6_shutdown_phase_node;
always_inline u16
sctp_handle_shutdown (sctp_header_t * sctp_hdr,
sctp_chunks_common_hdr_t * sctp_chunk_hdr,
sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b0, u16 sctp_implied_length,
u16 * next0)
{
sctp_shutdown_association_chunk_t *shutdown_chunk =
(sctp_shutdown_association_chunk_t *) (sctp_hdr);
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sctp_hdr->verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
/*
* It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
*/
if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
return SCTP_ERROR_BUNDLING_VIOLATION;
switch (sctp_conn->state)
{
case SCTP_STATE_ESTABLISHED:
if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
sctp_send_shutdown_ack (sctp_conn, idx, b0);
break;
case SCTP_STATE_SHUTDOWN_SENT:
sctp_send_shutdown_ack (sctp_conn, idx, b0);
break;
}
*next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
sctp_chunks_common_hdr_t * sctp_chunk_hdr,
sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b0, u16 sctp_implied_length,
u16 * next0)
{
sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
(sctp_shutdown_ack_chunk_t *) (sctp_hdr);
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sctp_hdr->verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
/*
* It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
*/
if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
return SCTP_ERROR_BUNDLING_VIOLATION;
/* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
* the reception of a SHUTDOWN_ACK chunk leads to the same actions:
* - STOP T2_SHUTDOWN timer
* - SEND SHUTDOWN_COMPLETE chunk
*/
sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
SCTP_TIMER_T2_SHUTDOWN);
sctp_send_shutdown_complete (sctp_conn, idx, b0);
*next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
sctp_chunks_common_hdr_t * sctp_chunk_hdr,
sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b0, u16 sctp_implied_length,
u16 * next0)
{
sctp_shutdown_complete_chunk_t *shutdown_complete =
(sctp_shutdown_complete_chunk_t *) (sctp_hdr);
/* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
if (sctp_conn->local_tag != sctp_hdr->verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
/*
* It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
*/
if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
return SCTP_ERROR_BUNDLING_VIOLATION;
sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN);
stream_session_disconnect_notify (&sctp_conn->sub_conn[idx].connection);
sctp_conn->state = SCTP_STATE_CLOSED;
*next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
return SCTP_ERROR_NONE;
}
always_inline uword
sctp46_shutdown_phase_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
{
u32 n_left_from, next_index, *from, *to_next;
u32 my_thread_index = vm->thread_index;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
vlib_buffer_t *b0;
sctp_rx_trace_t *sctp_trace;
sctp_header_t *sctp_hdr = 0;
sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
ip4_header_t *ip4_hdr = 0;
ip6_header_t *ip6_hdr = 0;
sctp_connection_t *sctp_conn;
u16 sctp_implied_length = 0;
u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
u8 idx = 0;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
sctp_conn =
sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
my_thread_index);
if (PREDICT_FALSE (sctp_conn == 0))
{
SCTP_DBG
("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
error0 = SCTP_ERROR_INVALID_CONNECTION;
goto drop;
}
if (is_ip4)
{
ip4_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip4_next_header (ip4_hdr);
idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
}
else
{
ip6_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip6_next_header (ip6_hdr);
idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
}
sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
sctp_chunk_hdr = &full_hdr->common_hdr;
sctp_implied_length =
sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
switch (chunk_type)
{
case SHUTDOWN:
error0 =
sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn,
idx, b0, sctp_implied_length, &next0);
break;
case SHUTDOWN_ACK:
error0 =
sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
idx, b0, sctp_implied_length,
&next0);
break;
case SHUTDOWN_COMPLETE:
error0 =
sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
sctp_conn, idx, b0,
sctp_implied_length, &next0);
sctp_connection_cleanup (sctp_conn);
break;
/*
* DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
* and SHUTDOWN-SENT states (as per RFC4960 Section 6)
*/
case DATA:
error0 =
sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
sctp_conn, idx, b0, &next0);
break;
case OPERATION_ERROR:
error0 =
sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
&next0);
break;
case COOKIE_ECHO: /* Cookie Received While Shutting Down */
sctp_prepare_operation_error (sctp_conn, idx, b0,
COOKIE_RECEIVED_WHILE_SHUTTING_DOWN);
error0 = SCTP_ERROR_NONE;
next0 = sctp_next_output (is_ip4);
break;
/* All UNEXPECTED scenarios (wrong chunk received per state-machine)
* are handled by the input-dispatcher function using the table-lookup
* hence we should never get to the "default" case below.
*/
default:
error0 = SCTP_ERROR_UNKOWN_CHUNK;
next0 = sctp_next_drop (is_ip4);
goto drop;
}
if (error0 != SCTP_ERROR_NONE)
{
clib_warning ("error while parsing chunk");
sctp_connection_cleanup (sctp_conn);
next0 = sctp_next_drop (is_ip4);
goto drop;
}
drop:
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
sctp_trace =
vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
if (sctp_hdr != NULL)
clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
sizeof (sctp_trace->sctp_header));
if (sctp_conn != NULL)
clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
sizeof (sctp_trace->sctp_connection));
}
b0->error = node->errors[error0];
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return from_frame->n_vectors;
}
static uword
sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
}
static uword
sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
{
.function = sctp4_shutdown_phase,
.name = "sctp4-shutdown",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
sctp4_shutdown_phase);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
{
.function = sctp6_shutdown_phase,
.name = "sctp6-shutdown",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
sctp6_shutdown_phase);
vlib_node_registration_t sctp4_listen_phase_node;
vlib_node_registration_t sctp6_listen_phase_node;
vlib_node_registration_t sctp4_established_phase_node;
vlib_node_registration_t sctp6_established_phase_node;
always_inline u16
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].last_seen = sctp_time_now ();
/* Section 7.2.2; point (2) */
if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh)
sctp_conn->sub_conn[idx].partially_acked_bytes =
sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack;
/* Section 7.2.2; point (5) */
if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0)
sctp_conn->sub_conn[idx].partially_acked_bytes = 0;
sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack;
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_drop (sctp_conn->sub_conn[idx].c_is_ip4);
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_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 != sctp_hb_chunk->sctp_hdr.verification_tag)
{
return SCTP_ERROR_INVALID_TAG;
}
sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0);
*next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
return SCTP_ERROR_NONE;
}
always_inline u16
sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
sctp_connection_t * sctp_conn, u8 idx,
vlib_buffer_t * b0, u16 * next0)
{
sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
sctp_conn->sub_conn[idx].RTO);
*next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
return SCTP_ERROR_NONE;
}
always_inline void
sctp_node_inc_counter (vlib_main_t * vm, u32 sctp4_node, u32 sctp6_node,
u8 is_ip4, u8 evt, u8 val)
{
if (PREDICT_TRUE (!val))
return;
if (is_ip4)
vlib_node_increment_counter (vm, sctp4_node, evt, val);
else
vlib_node_increment_counter (vm, sctp6_node, evt, val);
}
always_inline uword
sctp46_listen_process_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
{
u32 n_left_from, next_index, *from, *to_next;
u32 my_thread_index = vm->thread_index;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
vlib_buffer_t *b0;
sctp_header_t *sctp_hdr = 0;
ip4_header_t *ip4_hdr;
ip6_header_t *ip6_hdr;
sctp_connection_t *child_conn;
sctp_connection_t *sctp_listener;
u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
sctp_listener =
sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
if (is_ip4)
{
ip4_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip4_next_header (ip4_hdr);
}
else
{
ip6_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip6_next_header (ip6_hdr);
}
child_conn =
sctp_lookup_connection (sctp_listener->sub_conn
[MAIN_SCTP_SUB_CONN_IDX].c_fib_index, b0,
my_thread_index, is_ip4);
if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
{
SCTP_DBG
("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
connection.c_index,
sctp_state_to_string (child_conn->state));
error0 = SCTP_ERROR_CREATE_EXISTS;
goto drop;
}
/* Create child session and send SYN-ACK */
child_conn = sctp_connection_new (my_thread_index);
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
MAIN_SCTP_SUB_CONN_IDX;
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_port =
sctp_hdr->dst_port;
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_port =
sctp_hdr->src_port;
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_is_ip4 = is_ip4;
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto;
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU =
sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU;
child_conn->state = SCTP_STATE_CLOSED;
if (is_ip4)
{
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip4.as_u32 =
ip4_hdr->dst_address.as_u32;
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip4.as_u32 =
ip4_hdr->src_address.as_u32;
}
else
{
clib_memcpy (&child_conn->
sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip6,
&ip6_hdr->dst_address, sizeof (ip6_address_t));
clib_memcpy (&child_conn->
sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip6,
&ip6_hdr->src_address, sizeof (ip6_address_t));
}
sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
if (chunk_type != INIT)
{
SCTP_DBG
("conn_index = %u: chunk_type != INIT... chunk_type=%s",
child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
connection.c_index, sctp_chunk_to_string (chunk_type));
error0 = SCTP_ERROR_UNKOWN_CHUNK;
next0 = sctp_next_drop (is_ip4);
goto drop;
}
u16 sctp_implied_length =
sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
switch (chunk_type)
{
case INIT:
sctp_connection_timers_init (child_conn);
sctp_init_snd_vars (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
(&child_conn->
sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection,
sctp_listener->
sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index, 0))
{
clib_warning ("session accept fail");
sctp_connection_cleanup (child_conn);
error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
goto drop;
}
next0 = sctp_next_output (is_ip4);
}
break;
/* Reception of a DATA chunk whilst in the CLOSED state is called
* "Out of the Blue" packet and handling of the chunk needs special treatment
* as per RFC4960 section 8.4
*/
case DATA:
break;
case OPERATION_ERROR:
error0 =
sctp_handle_operation_err (sctp_hdr, child_conn,
MAIN_SCTP_SUB_CONN_IDX, b0,
&next0);
break;
}
drop:
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
sctp_rx_trace_t *t0 =
vlib_add_trace (vm, node, b0, sizeof (*t0));
clib_memcpy (&t0->sctp_header, sctp_hdr,
sizeof (t0->sctp_header));
clib_memcpy (&t0->sctp_connection, sctp_listener,
sizeof (t0->sctp_connection));
}
b0->error = node->errors[error0];
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return from_frame->n_vectors;
}
static uword
sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
}
static uword
sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
}
always_inline uword
sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
{
u32 n_left_from, next_index, *from, *to_next;
u32 my_thread_index = vm->thread_index, errors = 0;
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
vlib_buffer_t *b0;
sctp_header_t *sctp_hdr = 0;
sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
ip4_header_t *ip4_hdr = 0;
ip6_header_t *ip6_hdr = 0;
sctp_connection_t *sctp_conn;
u16 error0 = SCTP_ERROR_ENQUEUED, next0 =
SCTP_ESTABLISHED_PHASE_N_NEXT;
u8 idx;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
sctp_conn =
sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
my_thread_index);
if (PREDICT_FALSE (sctp_conn == 0))
{
SCTP_DBG
("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
error0 = SCTP_ERROR_INVALID_CONNECTION;
goto done;
}
if (is_ip4)
{
ip4_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip4_next_header (ip4_hdr);
idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
}
else
{
ip6_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip6_next_header (ip6_hdr);
idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
}
sctp_conn->sub_conn[idx].subconn_idx = idx;
sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
sctp_chunk_hdr =
(sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
switch (chunk_type)
{
case COOKIE_ECHO:
error0 =
sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
idx, b0, &next0);
break;
case COOKIE_ACK:
error0 =
sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
idx, b0, &next0);
break;
case SACK:
error0 =
sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
sctp_conn, idx, b0, &next0);
break;
case HEARTBEAT:
error0 =
sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
sctp_conn, idx, b0, &next0);
break;
case HEARTBEAT_ACK:
error0 =
sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
sctp_conn, idx, b0, &next0);
break;
case DATA:
error0 =
sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
sctp_conn, idx, b0, &next0);
break;
case OPERATION_ERROR:
error0 =
sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
&next0);
break;
/* All UNEXPECTED scenarios (wrong chunk received per state-machine)
* are handled by the input-dispatcher function using the table-lookup
* hence we should never get to the "default" case below.
*/
default:
error0 = SCTP_ERROR_UNKOWN_CHUNK;
next0 = sctp_next_drop (is_ip4);
goto done;
}
done:
b0->error = node->errors[error0];
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
sctp_rx_trace_t *t0 =
vlib_add_trace (vm, node, b0, sizeof (*t0));
sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
my_thread_index);
sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
sctp6_established_phase_node.index,
SCTP_ERROR_EVENT_FIFO_FULL, errors);
sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
return from_frame->n_vectors;
}
static uword
sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_established_phase_inline (vm, node, from_frame,
1 /* is_ip4 */ );
}
static uword
sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_established_phase_inline (vm, node, from_frame,
0 /* is_ip4 */ );
}
u8 *
format_sctp_rx_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
u32 indent = format_get_indent (s);
s = format (s, "%U\n%U%U",
format_sctp_header, &t->sctp_header, 128,
format_white_space, indent,
format_sctp_connection, &t->sctp_connection, 1);
return s;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
{
.function = sctp4_listen_phase,
.name = "sctp4-listen",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
{
.function = sctp6_listen_phase,
.name = "sctp6-listen",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp4_established_phase_node) =
{
.function = sctp4_established_phase,
.name = "sctp4-established",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
sctp4_established_phase);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp6_established_phase_node) =
{
.function = sctp6_established_phase,
.name = "sctp6-established",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
foreach_sctp_state_next
#undef _
},
.format_trace = format_sctp_rx_trace_short,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
sctp6_established_phase);
/*
* This is the function executed first for the SCTP graph.
* It takes care of doing the initial message parsing and
* dispatch to the specialized function.
*/
always_inline uword
sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip4)
{
u32 n_left_from, next_index, *from, *to_next;
u32 my_thread_index = vm->thread_index;
u8 is_filtered;
sctp_main_t *tm = vnet_get_sctp_main ();
from = vlib_frame_vector_args (from_frame);
n_left_from = from_frame->n_vectors;
next_index = node->cached_next_index;
sctp_set_time_now (my_thread_index);
while (n_left_from > 0)
{
u32 n_left_to_next;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
int n_advance_bytes0, n_data_bytes0;
u32 bi0, fib_index0;
vlib_buffer_t *b0;
sctp_header_t *sctp_hdr = 0;
sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
sctp_connection_t *sctp_conn;
transport_connection_t *trans_conn;
ip4_header_t *ip4_hdr;
ip6_header_t *ip6_hdr;
u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
vnet_buffer (b0)->sctp.flags = 0;
fib_index0 = vnet_buffer (b0)->ip.fib_index;
/* Checksum computed by ipx_local no need to compute again */
if (is_ip4)
{
ip4_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip4_next_header (ip4_hdr);
sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
sctp_chunk_hdr = &full_hdr->common_hdr;
n_advance_bytes0 =
(ip4_header_bytes (ip4_hdr) +
sizeof (sctp_payload_data_chunk_t));
n_data_bytes0 =
clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
trans_conn = session_lookup_connection_wt4 (fib_index0,
&ip4_hdr->dst_address,
&ip4_hdr->src_address,
sctp_hdr->dst_port,
sctp_hdr->src_port,
TRANSPORT_PROTO_SCTP,
my_thread_index,
&is_filtered);
}
else
{
ip6_hdr = vlib_buffer_get_current (b0);
sctp_hdr = ip6_next_header (ip6_hdr);
sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
sctp_chunk_hdr = &full_hdr->common_hdr;
n_advance_bytes0 = sctp_header_bytes ();
n_data_bytes0 =
clib_net_to_host_u16 (ip6_hdr->payload_length) -
n_advance_bytes0;
n_advance_bytes0 += sizeof (ip6_hdr[0]);
trans_conn = session_lookup_connection_wt6 (fib_index0,
&ip6_hdr->dst_address,
&ip6_hdr->src_address,
sctp_hdr->dst_port,
sctp_hdr->src_port,
TRANSPORT_PROTO_SCTP,
my_thread_index,
&is_filtered);
}
/* Length check */
if (PREDICT_FALSE (n_advance_bytes0 < 0))
{
error0 = SCTP_ERROR_LENGTH;
goto done;
}
sctp_conn = sctp_get_connection_from_transport (trans_conn);
vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
if (chunk_type >= UNKNOWN)
{
clib_warning
("Received an unrecognized chunk; sending back OPERATION_ERROR chunk");
sctp_prepare_operation_error (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
b0, UNRECOGNIZED_CHUNK_TYPE);
error0 = SCTP_ERROR_UNKOWN_CHUNK;
next0 = sctp_next_output (is_ip4);
goto done;
}
vnet_buffer (b0)->sctp.hdr_offset =
(u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
/* Session exists */
if (PREDICT_TRUE (0 != sctp_conn))
{
/* Save connection index */
vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next;
error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error;
SCTP_DBG_STATE_MACHINE
("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s,"
"CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s",
sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
connection.s_index,
sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
connection.c_index, trans_conn, sctp_conn,
sctp_state_to_string (sctp_conn->state),
sctp_chunk_to_string (chunk_type), phase_to_string (next0));
if (chunk_type == DATA)
SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
n_advance_bytes0, n_data_bytes0);
}
else
{
if (is_filtered)
{
next0 = SCTP_INPUT_NEXT_DROP;
error0 = SCTP_ERROR_FILTERED;
}
else if ((is_ip4 && tm->punt_unknown4) ||
(!is_ip4 && tm->punt_unknown6))
{
next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
error0 = SCTP_ERROR_PUNT;
}
else
{
next0 = SCTP_INPUT_NEXT_DROP;
error0 = SCTP_ERROR_NO_LISTENER;
}
SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
phase_to_string (next0));
sctp_conn = 0;
}
done:
b0->error = error0 ? node->errors[error0] : 0;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
sctp_rx_trace_t *t0 =
vlib_add_trace (vm, node, b0, sizeof (*t0));
sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return from_frame->n_vectors;
}
static uword
sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
}
static uword
sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp4_input_node) =
{
.function = sctp4_input_dispatcher,
.name = "sctp4-input",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_INPUT_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
foreach_sctp4_input_next
#undef _
},
.format_buffer = format_sctp_header,
.format_trace = format_sctp_rx_trace,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sctp6_input_node) =
{
.function = sctp6_input_dispatcher,
.name = "sctp6-input",
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
.n_errors = SCTP_N_ERROR,
.error_strings = sctp_error_strings,
.n_next_nodes = SCTP_INPUT_N_NEXT,
.next_nodes =
{
#define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
foreach_sctp6_input_next
#undef _
},
.format_buffer = format_sctp_header,
.format_trace = format_sctp_rx_trace,
};
/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
vlib_node_registration_t sctp4_input_node;
vlib_node_registration_t sctp6_input_node;
static void
sctp_dispatch_table_init (sctp_main_t * tm)
{
int i, j;
for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
{
tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
}
#define _(t,f,n,e) \
do { \
tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
} while (0)
/*
* SCTP STATE-MACHINE states:
*
* _(CLOSED, "CLOSED") \
* _(COOKIE_WAIT, "COOKIE_WAIT") \
* _(COOKIE_ECHOED, "COOKIE_ECHOED") \
* _(ESTABLISHED, "ESTABLISHED") \
* _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
* _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
* _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
* _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
*/
//_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
_(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
_(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
_(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
_(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
_(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
_(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
_(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
_(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
_(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
_(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
_(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
_(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
_(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
_(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
_(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
_(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
_(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
_(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
_(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
_(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
_(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
_(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
_(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
_(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
_(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
_(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
_(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
_(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
_(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
_(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
_(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
_(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
SCTP_ERROR_NONE);
_(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
_(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
_(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
_(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
SCTP_ERROR_NONE);
_(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
SCTP_ERROR_NONE);
_(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
_(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
_(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
_(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
_(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
_(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
_(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
_(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
_(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
_(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
_(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
_(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
_(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
_(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
_(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
_(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
_(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(SHUTDOWN_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
_(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
_(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
_(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
_(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
_(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
_(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
_(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
_(SHUTDOWN_RECEIVED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
_(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk */
_(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
_(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
_(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
_(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
_(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
_(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
_(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
_(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
_(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
_(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
_(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
SCTP_ERROR_NONE);
_(SHUTDOWN_ACK_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
SCTP_ERROR_NONE);
/* TODO: Handle COOKIE ECHO when a TCB Exists */
#undef _
}
clib_error_t *
sctp_input_init (vlib_main_t * vm)
{
clib_error_t *error = 0;
sctp_main_t *tm = vnet_get_sctp_main ();
if ((error = vlib_call_init_function (vm, sctp_init)))
return error;
/* Initialize dispatch table. */
sctp_dispatch_table_init (tm);
return error;
}
VLIB_INIT_FUNCTION (sctp_input_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/