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-rw-r--r--src/plugins/sctp/sctp_input.c2532
1 files changed, 2532 insertions, 0 deletions
diff --git a/src/plugins/sctp/sctp_input.c b/src/plugins/sctp/sctp_input.c
new file mode 100644
index 00000000000..7f52a2f9c32
--- /dev/null
+++ b/src/plugins/sctp/sctp_input.c
@@ -0,0 +1,2532 @@
+/*
+ * 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 <sctp/sctp.h>
+#include <sctp/sctp_packet.h>
+#include <sctp/sctp_debug.h>
+#include <vnet/session/session.h>
+#include <math.h>
+
+static char *sctp_error_strings[] = {
+#define sctp_error(n,s) s,
+#include <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;
+
+#ifndef CLIB_MARCH_VARIANT
+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;
+}
+#endif /* CLIB_MARCH_VARIANT */
+
+#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)
+
+static 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_fast (&rx_trace->sctp_connection, sctp_conn,
+ sizeof (rx_trace->sctp_connection));
+ }
+ else
+ {
+ sctp_hdr = sctp_buffer_hdr (b0);
+ }
+ clib_memcpy_fast (&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);
+
+ session_transport_closing_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;
+ ip6_address_t ip6_addr;
+ u8 add_ip4 = 0;
+ u8 add_ip6 = 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,
+ SCTP_PRIMARY_PATH_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,
+ SCTP_PRIMARY_PATH_IDX,
+ b0, &ip4_addr,
+ &ip6_addr);
+ else
+ sctp_prepare_abort_for_collision (sctp_conn,
+ SCTP_PRIMARY_PATH_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->peer_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
+ /*
+ * If the length specified in the INIT message is bigger than the size in bytes of our structure it means that
+ * optional parameters have been sent with the INIT chunk and we need to parse them.
+ */
+ 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_fast (&ip4_addr, &ipv4->address,
+ sizeof (ip4_address_t));
+
+ if (sctp_sub_connection_add_ip4 (vlib_get_main (),
+ &sctp_conn->sub_conn
+ [SCTP_PRIMARY_PATH_IDX].connection.
+ lcl_ip.ip4,
+ &ipv4->address) ==
+ SCTP_ERROR_NONE)
+ add_ip4 = 1;
+
+ break;
+ }
+ case SCTP_IPV6_ADDRESS_TYPE:
+ {
+ sctp_ipv6_addr_param_t *ipv6 =
+ (sctp_ipv6_addr_param_t *) opt_params_hdr;
+ clib_memcpy_fast (&ip6_addr, &ipv6->address,
+ sizeof (ip6_address_t));
+
+ if (sctp_sub_connection_add_ip6 (vlib_get_main (),
+ &sctp_conn->sub_conn
+ [SCTP_PRIMARY_PATH_IDX].connection.
+ lcl_ip.ip6,
+ &ipv6->address) ==
+ SCTP_ERROR_NONE)
+ add_ip6 = 1;
+
+ 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_fast (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, SCTP_PRIMARY_PATH_IDX, b0, &ip4_addr,
+ add_ip4, &ip6_addr, add_ip6);
+ 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);
+
+ 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;
+
+ /* Stop the T1_INIT timer */
+ sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_INIT);
+
+ 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->peer_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
+ [SCTP_PRIMARY_PATH_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
+ [SCTP_PRIMARY_PATH_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_fast (&(sctp_conn->cookie_param),
+ 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_fast (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, 1);
+
+ /* 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 (sctp_conn->conn_config.never_delay_sack)
+ {
+ SCTP_CONN_TRACKING_DBG ("sctp_conn->conn_config.never_delay_sack = ON");
+ return 0;
+ }
+
+ /* Section 4.4 of the RFC4960 */
+ if (sctp_conn->state == SCTP_STATE_SHUTDOWN_SENT)
+ {
+ SCTP_CONN_TRACKING_DBG ("sctp_conn->state = %s; SACK not delayable",
+ sctp_state_to_string (sctp_conn->state));
+ return 0;
+ }
+
+ if (is_gapping)
+ {
+ 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;
+ }
+
+ sctp_conn->ack_state += 1;
+ 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;
+ }
+
+ 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[SCTP_PRIMARY_PATH_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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ sctp_conn->sub_conn[idx].enqueue_state = SCTP_ERROR_INVALID_TAG;
+ return sctp_conn->sub_conn[idx].enqueue_state;
+ }
+
+ sctp_buffer_opaque (b)->sctp.sid = sctp_data_chunk->stream_id;
+ sctp_buffer_opaque (b)->sctp.ssn = sctp_data_chunk->stream_seq;
+
+ u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
+
+ vlib_buffer_advance (b, sctp_buffer_opaque (b)->sctp.data_offset);
+ u32 chunk_len = vnet_sctp_get_chunk_length (&sctp_data_chunk->chunk_hdr) -
+ (sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_header_t));
+
+ ASSERT (sctp_buffer_opaque (b)->sctp.data_len);
+ ASSERT (chunk_len);
+
+ /* Padding was added: see RFC 4096 section 3.3.1 */
+ if (sctp_buffer_opaque (b)->sctp.data_len > chunk_len)
+ {
+ /* Let's change the data_len to the right amount calculated here now.
+ * We cannot do that in the generic sctp46_input_dispatcher node since
+ * that is common to all CHUNKS handling.
+ */
+ sctp_buffer_opaque (b)->sctp.data_len = chunk_len;
+ /* We need to change b->current_length so that downstream calls to
+ * session_enqueue_stream_connection (called by sctp_session_enqueue_data)
+ * push the correct amount of data to be enqueued.
+ */
+ b->current_length = chunk_len;
+ }
+ n_data_bytes = sctp_buffer_opaque (b)->sctp.data_len;
+
+ 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;
+
+ SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
+
+ if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
+ {
+ *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
+ sctp_prepare_sack_chunk (sctp_conn, idx, b);
+ }
+ else
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+
+ sctp_conn->sub_conn[idx].enqueue_state = error;
+
+ 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)
+{
+ u64 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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ return SCTP_ERROR_INVALID_TAG;
+ }
+
+ sctp_calculate_rto (sctp_conn, idx);
+
+ u64 creation_time =
+ clib_net_to_host_u64 (cookie_echo->cookie.creation_time);
+ u64 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);
+
+ session_stream_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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ 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);
+
+ session_stream_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 (sctp_buffer_opaque (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_fast (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);
+
+ sctp_init_cwnd (new_sctp_conn);
+
+ error0 =
+ sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
+ new_sctp_conn, idx, b0,
+ sctp_implied_length);
+
+ 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_UNKNOWN_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;
+}
+
+VLIB_NODE_FN (sctp4_rcv_phase_node) (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 */ );
+}
+
+VLIB_NODE_FN (sctp6_init_phase_node) (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 */ );
+}
+
+static 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) =
+{
+ .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* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (sctp6_init_phase_node) =
+{
+ .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* */
+
+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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ 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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ 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, SCTP_PRIMARY_PATH_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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ 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);
+
+ session_transport_closing_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 (sctp_buffer_opaque (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_UNKNOWN_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_fast (&sctp_trace->sctp_header, sctp_hdr,
+ sizeof (sctp_trace->sctp_header));
+
+ if (sctp_conn != NULL)
+ clib_memcpy_fast (&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;
+
+}
+
+VLIB_NODE_FN (sctp4_shutdown_phase_node) (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 */ );
+}
+
+VLIB_NODE_FN (sctp6_shutdown_phase_node) (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) =
+{
+ .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* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
+{
+ .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* */
+
+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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ return SCTP_ERROR_INVALID_TAG;
+ }
+
+ sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_SACK_RECEIVED;
+
+ sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
+
+ /* Section 7.2.2; point (2) */
+ 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)
+ {
+ *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
+ 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 (sctp_buffer_opaque (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
+ [SCTP_PRIMARY_PATH_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[SCTP_PRIMARY_PATH_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[SCTP_PRIMARY_PATH_IDX].subconn_idx =
+ SCTP_PRIMARY_PATH_IDX;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_port =
+ sctp_hdr->dst_port;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_port =
+ sctp_hdr->src_port;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_is_ip4 = is_ip4;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto =
+ sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU =
+ sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU;
+ child_conn->state = SCTP_STATE_CLOSED;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.fib_index =
+ sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].
+ connection.fib_index;
+
+ if (is_ip4)
+ {
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip4.as_u32 =
+ ip4_hdr->dst_address.as_u32;
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip4.as_u32 =
+ ip4_hdr->src_address.as_u32;
+ }
+ else
+ {
+ clib_memcpy_fast (&child_conn->
+ sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip6,
+ &ip6_hdr->dst_address,
+ sizeof (ip6_address_t));
+ clib_memcpy_fast (&child_conn->
+ sub_conn[SCTP_PRIMARY_PATH_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 && chunk_type != DATA
+ && chunk_type != OPERATION_ERROR)
+ {
+ SCTP_DBG
+ ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
+ child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
+ connection.c_index, sctp_chunk_to_string (chunk_type));
+
+ error0 = SCTP_ERROR_UNKNOWN_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);
+
+ sctp_init_cwnd (child_conn);
+
+ error0 =
+ sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
+ sctp_implied_length);
+
+ if (error0 == SCTP_ERROR_NONE)
+ {
+ if (session_stream_accept
+ (&child_conn->
+ sub_conn[SCTP_PRIMARY_PATH_IDX].connection,
+ sctp_listener->
+ sub_conn[SCTP_PRIMARY_PATH_IDX].c_s_index,
+ sctp_listener->
+ sub_conn[SCTP_PRIMARY_PATH_IDX].c_thread_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,
+ SCTP_PRIMARY_PATH_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_fast (&t0->sctp_header, sctp_hdr,
+ sizeof (t0->sctp_header));
+ clib_memcpy_fast (&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;
+}
+
+VLIB_NODE_FN (sctp4_listen_phase_node) (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 */ );
+}
+
+VLIB_NODE_FN (sctp6_listen_phase_node) (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)
+{
+ sctp_main_t *sm = vnet_get_sctp_main ();
+ 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 (sctp_buffer_opaque (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_UNKNOWN_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_main_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
+ my_thread_index);
+
+ sctp_node_inc_counter (vm, is_ip4, sm->sctp4_established_phase_node_index,
+ sm->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;
+}
+
+VLIB_NODE_FN (sctp4_established_phase_node) (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 */ );
+}
+
+VLIB_NODE_FN (sctp6_established_phase_node) (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 */ );
+}
+
+static 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) =
+{
+ .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* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
+{
+ .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* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (sctp4_established_phase_node) =
+{
+ .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* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (sctp6_established_phase_node) =
+{
+ .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* */
+
+/*
+ * 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 result;
+ 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);
+ sctp_buffer_opaque (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,
+ &result);
+ }
+ 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,
+ &result);
+ }
+
+ /* 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, SCTP_PRIMARY_PATH_IDX,
+ b0, UNRECOGNIZED_CHUNK_TYPE);
+
+ error0 = SCTP_ERROR_UNKNOWN_CHUNK;
+ next0 = sctp_next_output (is_ip4);
+ goto done;
+ }
+
+ sctp_buffer_opaque (b0)->sctp.hdr_offset =
+ (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
+
+ /* Session exists */
+ if (PREDICT_TRUE (0 != sctp_conn))
+ {
+ /* Save connection index */
+ sctp_buffer_opaque (b0)->sctp.connection_index
+ = trans_conn->c_index;
+ sctp_buffer_opaque (b0)->sctp.data_offset = n_advance_bytes0;
+ sctp_buffer_opaque (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[SCTP_PRIMARY_PATH_IDX].
+ connection.s_index,
+ sctp_conn->sub_conn[SCTP_PRIMARY_PATH_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 (result)
+ {
+ next0 = SCTP_INPUT_NEXT_DROP;
+ error0 = SCTP_ERROR_NONE + result;
+ }
+ 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;
+}
+
+VLIB_NODE_FN (sctp4_input_node) (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 */ );
+}
+
+VLIB_NODE_FN (sctp6_input_node) (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) =
+{
+ .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* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (sctp6_input_node) =
+{
+ .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* */
+
+#ifndef CLIB_MARCH_VARIANT
+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);
+#endif /* CLIB_MARCH_VARIANT */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */