X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Ftcp%2Ftcp.c;h=ea350dddc69c6ad10bdcd090948acc27dff68537;hb=7ac053b27fee8f9e437cf7b61357943356381061;hp=e5feaeb1e0338283888b3e6332a26a07c64f20b2;hpb=e04c29942af6a130591059679531c9ffa3d7237a;p=vpp.git diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index e5feaeb1e03..ea350dddc69 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -13,82 +13,181 @@ * limitations under the License. */ +/** + * @file + * @brief TCP host stack utilities + */ + #include #include #include +#include +#include +#include #include tcp_main_t tcp_main; +typedef struct +{ + fib_protocol_t nh_proto; + vnet_link_t link_type; + ip46_address_t ip; + u32 sw_if_index; + u8 is_add; +} tcp_add_del_adj_args_t; + +static void +tcp_add_del_adj_cb (tcp_add_del_adj_args_t * args) +{ + u32 ai; + if (args->is_add) + { + adj_nbr_add_or_lock (args->nh_proto, args->link_type, &args->ip, + args->sw_if_index); + } + else + { + ai = adj_nbr_find (FIB_PROTOCOL_IP6, VNET_LINK_IP6, &args->ip, + args->sw_if_index); + if (ai != ADJ_INDEX_INVALID) + adj_unlock (ai); + } +} + +static void +tcp_add_del_adjacency (tcp_connection_t * tc, u8 is_add) +{ + tcp_add_del_adj_args_t args = { + .nh_proto = FIB_PROTOCOL_IP6, + .link_type = VNET_LINK_IP6, + .ip = tc->c_rmt_ip, + .sw_if_index = tc->sw_if_index, + .is_add = is_add + }; + vlib_rpc_call_main_thread (tcp_add_del_adj_cb, (u8 *) & args, + sizeof (args)); +} + static u32 -tcp_connection_bind (vlib_main_t * vm, u32 session_index, ip46_address_t * ip, - u16 port_host_byte_order, u8 is_ip4) +tcp_connection_bind (u32 session_index, transport_endpoint_t * lcl) { tcp_main_t *tm = &tcp_main; tcp_connection_t *listener; + void *iface_ip; pool_get (tm->listener_pool, listener); - memset (listener, 0, sizeof (*listener)); + clib_memset (listener, 0, sizeof (*listener)); listener->c_c_index = listener - tm->listener_pool; - listener->c_lcl_port = clib_host_to_net_u16 (port_host_byte_order); - - if (is_ip4) - listener->c_lcl_ip4.as_u32 = ip->ip4.as_u32; - else - clib_memcpy (&listener->c_lcl_ip6, &ip->ip6, sizeof (ip6_address_t)); + listener->c_lcl_port = lcl->port; + /* If we are provided a sw_if_index, bind using one of its ips */ + if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX) + { + if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index, + lcl->is_ip4))) + ip_set (&lcl->ip, iface_ip, lcl->is_ip4); + } + ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4); + listener->c_is_ip4 = lcl->is_ip4; + listener->c_proto = TRANSPORT_PROTO_TCP; listener->c_s_index = session_index; - listener->c_proto = SESSION_TYPE_IP4_TCP; + listener->c_fib_index = lcl->fib_index; listener->state = TCP_STATE_LISTEN; - listener->c_is_ip4 = 1; + + tcp_connection_timers_init (listener); + + TCP_EVT_DBG (TCP_EVT_BIND, listener); return listener->c_c_index; } -u32 -tcp_session_bind_ip4 (vlib_main_t * vm, u32 session_index, - ip46_address_t * ip, u16 port_host_byte_order) +static u32 +tcp_session_bind (u32 session_index, transport_endpoint_t * tep) { - return tcp_connection_bind (vm, session_index, ip, port_host_byte_order, 1); + return tcp_connection_bind (session_index, tep); } -u32 -tcp_session_bind_ip6 (vlib_main_t * vm, u32 session_index, - ip46_address_t * ip, u16 port_host_byte_order) +static void +tcp_connection_unbind (u32 listener_index) { - return tcp_connection_bind (vm, session_index, ip, port_host_byte_order, 0); + tcp_main_t *tm = vnet_get_tcp_main (); + tcp_connection_t *tc; + + tc = pool_elt_at_index (tm->listener_pool, listener_index); + + TCP_EVT_DBG (TCP_EVT_UNBIND, tc); + /* Poison the entry */ + if (CLIB_DEBUG > 0) + clib_memset (tc, 0xFA, sizeof (*tc)); + + pool_put_index (tm->listener_pool, listener_index); } -static void +static u32 tcp_session_unbind (u32 listener_index) +{ + tcp_connection_unbind (listener_index); + return 0; +} + +static transport_connection_t * +tcp_session_get_listener (u32 listener_index) { tcp_main_t *tm = vnet_get_tcp_main (); - pool_put_index (tm->listener_pool, listener_index); + tcp_connection_t *tc; + tc = pool_elt_at_index (tm->listener_pool, listener_index); + return &tc->connection; } -u32 -tcp_session_unbind_ip4 (vlib_main_t * vm, u32 listener_index) +/** + * Cleanup half-open connection + * + */ +static void +tcp_half_open_connection_del (tcp_connection_t * tc) { - tcp_session_unbind (listener_index); - return 0; + tcp_main_t *tm = vnet_get_tcp_main (); + clib_spinlock_lock_if_init (&tm->half_open_lock); + pool_put_index (tm->half_open_connections, tc->c_c_index); + if (CLIB_DEBUG) + clib_memset (tc, 0xFA, sizeof (*tc)); + clib_spinlock_unlock_if_init (&tm->half_open_lock); } -u32 -tcp_session_unbind_ip6 (vlib_main_t * vm, u32 listener_index) +/** + * Try to cleanup half-open connection + * + * If called from a thread that doesn't own tc, the call won't have any + * effect. + * + * @param tc - connection to be cleaned up + * @return non-zero if cleanup failed. + */ +int +tcp_half_open_connection_cleanup (tcp_connection_t * tc) { - tcp_session_unbind (listener_index); + /* Make sure this is the owning thread */ + if (tc->c_thread_index != vlib_get_thread_index ()) + return 1; + tcp_timer_reset (tc, TCP_TIMER_ESTABLISH); + tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT_SYN); + tcp_half_open_connection_del (tc); return 0; } -transport_connection_t * -tcp_session_get_listener (u32 listener_index) +static tcp_connection_t * +tcp_half_open_connection_new (void) { tcp_main_t *tm = vnet_get_tcp_main (); - tcp_connection_t *tc; - tc = pool_elt_at_index (tm->listener_pool, listener_index); - return &tc->connection; + tcp_connection_t *tc = 0; + ASSERT (vlib_get_thread_index () == 0); + pool_get (tm->half_open_connections, tc); + clib_memset (tc, 0, sizeof (*tc)); + tc->c_c_index = tc - tm->half_open_connections; + return tc; } /** @@ -100,29 +199,35 @@ void tcp_connection_cleanup (tcp_connection_t * tc) { tcp_main_t *tm = &tcp_main; - u32 tepi; - transport_endpoint_t *tep; /* Cleanup local endpoint if this was an active connect */ - tepi = transport_endpoint_lookup (&tm->local_endpoints_table, &tc->c_lcl_ip, - tc->c_lcl_port); + transport_endpoint_cleanup (TRANSPORT_PROTO_TCP, &tc->c_lcl_ip, + tc->c_lcl_port); - /*XXX lock */ - if (tepi != TRANSPORT_ENDPOINT_INVALID_INDEX) + /* Check if connection is not yet fully established */ + if (tc->state == TCP_STATE_SYN_SENT) { - tep = pool_elt_at_index (tm->local_endpoints, tepi); - transport_endpoint_table_del (&tm->local_endpoints_table, tep); - pool_put (tm->local_endpoints, tep); + /* Try to remove the half-open connection. If this is not the owning + * thread, tc won't be removed. Retransmit or establish timers will + * eventually expire and call again cleanup on the right thread. */ + if (tcp_half_open_connection_cleanup (tc)) + tc->flags |= TCP_CONN_HALF_OPEN_DONE; } + else + { + int thread_index = tc->c_thread_index; - /* Make sure all timers are cleared */ - tcp_connection_timers_reset (tc); + /* Make sure all timers are cleared */ + tcp_connection_timers_reset (tc); - /* Check if half-open */ - if (tc->state == TCP_STATE_SYN_SENT) - pool_put (tm->half_open_connections, tc); - else - pool_put (tm->connections[tc->c_thread_index], tc); + if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6)) + tcp_add_del_adjacency (tc, 0); + + /* Poison the entry */ + if (CLIB_DEBUG > 0) + clib_memset (tc, 0xFA, sizeof (*tc)); + pool_put (tm->connections[thread_index], tc); + } } /** @@ -135,10 +240,64 @@ tcp_connection_cleanup (tcp_connection_t * tc) void tcp_connection_del (tcp_connection_t * tc) { + TCP_EVT_DBG (TCP_EVT_DELETE, tc); stream_session_delete_notify (&tc->connection); tcp_connection_cleanup (tc); } +tcp_connection_t * +tcp_connection_new (u8 thread_index) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + tcp_connection_t *tc; + + pool_get (tm->connections[thread_index], tc); + clib_memset (tc, 0, sizeof (*tc)); + tc->c_c_index = tc - tm->connections[thread_index]; + tc->c_thread_index = thread_index; + return tc; +} + +/** Notify session that connection has been reset. + * + * Switch state to closed and wait for session to call cleanup. + */ +void +tcp_connection_reset (tcp_connection_t * tc) +{ + TCP_EVT_DBG (TCP_EVT_RST_RCVD, tc); + switch (tc->state) + { + case TCP_STATE_SYN_RCVD: + /* Cleanup everything. App wasn't notified yet */ + stream_session_delete_notify (&tc->connection); + tcp_connection_cleanup (tc); + break; + case TCP_STATE_SYN_SENT: + session_stream_connect_notify (&tc->connection, 1 /* fail */ ); + tcp_connection_cleanup (tc); + break; + case TCP_STATE_ESTABLISHED: + tcp_connection_timers_reset (tc); + /* Set the cleanup timer, in case the session layer/app don't + * cleanly close the connection */ + tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); + stream_session_reset_notify (&tc->connection); + break; + case TCP_STATE_CLOSE_WAIT: + case TCP_STATE_FIN_WAIT_1: + case TCP_STATE_FIN_WAIT_2: + case TCP_STATE_CLOSING: + tc->state = TCP_STATE_CLOSED; + TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); + tcp_connection_timers_reset (tc); + tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); + break; + case TCP_STATE_CLOSED: + return; + } +} + /** * Begin connection closing procedure. * @@ -149,30 +308,60 @@ tcp_connection_del (tcp_connection_t * tc) * calls cleanup. * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers * and cleanup is called. + * + * N.B. Half-close connections are not supported */ void tcp_connection_close (tcp_connection_t * tc) { - /* Send FIN if needed */ - if (tc->state == TCP_STATE_ESTABLISHED || tc->state == TCP_STATE_SYN_RCVD - || tc->state == TCP_STATE_CLOSE_WAIT) - tcp_send_fin (tc); + TCP_EVT_DBG (TCP_EVT_CLOSE, tc); - /* Switch state */ - if (tc->state == TCP_STATE_ESTABLISHED || tc->state == TCP_STATE_SYN_RCVD) - tc->state = TCP_STATE_FIN_WAIT_1; - else if (tc->state == TCP_STATE_SYN_SENT) - tc->state = TCP_STATE_CLOSED; - else if (tc->state == TCP_STATE_CLOSE_WAIT) - tc->state = TCP_STATE_LAST_ACK; + /* Send/Program FIN if needed and switch state */ + switch (tc->state) + { + case TCP_STATE_SYN_SENT: + tc->state = TCP_STATE_CLOSED; + break; + case TCP_STATE_SYN_RCVD: + tcp_connection_timers_reset (tc); + tcp_send_fin (tc); + tc->state = TCP_STATE_FIN_WAIT_1; + tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); + break; + case TCP_STATE_ESTABLISHED: + if (!session_tx_fifo_max_dequeue (&tc->connection)) + tcp_send_fin (tc); + else + tc->flags |= TCP_CONN_FINPNDG; + tc->state = TCP_STATE_FIN_WAIT_1; + break; + case TCP_STATE_CLOSE_WAIT: + if (!session_tx_fifo_max_dequeue (&tc->connection)) + { + tcp_send_fin (tc); + tcp_connection_timers_reset (tc); + tc->state = TCP_STATE_LAST_ACK; + tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); + } + else + tc->flags |= TCP_CONN_FINPNDG; + break; + case TCP_STATE_FIN_WAIT_1: + tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); + break; + default: + TCP_DBG ("state: %u", tc->state); + } - /* Half-close connections are not supported XXX */ + TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); - if (tc->state == TCP_STATE_CLOSED) + /* If in CLOSED and WAITCLOSE timer is not set, delete connection now */ + if (!tcp_timer_is_active (tc, TCP_TIMER_WAITCLOSE) + && tc->state == TCP_STATE_CLOSED) tcp_connection_del (tc); } -void +static void tcp_session_close (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; @@ -180,93 +369,17 @@ tcp_session_close (u32 conn_index, u32 thread_index) tcp_connection_close (tc); } -void +static void tcp_session_cleanup (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); + tcp_connection_timers_reset (tc); + tc->state = TCP_STATE_CLOSED; + TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); tcp_connection_cleanup (tc); } -void * -ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4) -{ - ip_lookup_main_t *lm4 = &ip4_main.lookup_main; - ip_lookup_main_t *lm6 = &ip6_main.lookup_main; - ip_interface_address_t *ia = 0; - - if (is_ip4) - { - /* *INDENT-OFF* */ - foreach_ip_interface_address (lm4, ia, sw_if_index, 1 /* unnumbered */ , - ({ - return ip_interface_address_get_address (lm4, ia); - })); - /* *INDENT-ON* */ - } - else - { - /* *INDENT-OFF* */ - foreach_ip_interface_address (lm6, ia, sw_if_index, 1 /* unnumbered */ , - ({ - return ip_interface_address_get_address (lm6, ia); - })); - /* *INDENT-ON* */ - } - - return 0; -} - -#define PORT_MASK ((1 << 16)- 1) -/** - * Allocate local port and add if successful add entry to local endpoint - * table to mark the pair as used. - */ -u16 -tcp_allocate_local_port (tcp_main_t * tm, ip46_address_t * ip) -{ - transport_endpoint_t *tep; - u32 time_now, tei; - u16 min = 1024, max = 65535, tries; /* XXX configurable ? */ - - tries = max - min; - time_now = tcp_time_now (); - - /* Start at random point or max */ - pool_get (tm->local_endpoints, tep); - clib_memcpy (&tep->ip, ip, sizeof (*ip)); - - /* Search for first free slot */ - for (; tries >= 0; tries--) - { - u16 port = 0; - - /* Find a port in the specified range */ - while (1) - { - port = random_u32 (&time_now) & PORT_MASK; - if (PREDICT_TRUE (port >= min && port < max)) - break; - } - - tep->port = port; - - /* Look it up */ - tei = transport_endpoint_lookup (&tm->local_endpoints_table, &tep->ip, - tep->port); - /* If not found, we're done */ - if (tei == TRANSPORT_ENDPOINT_INVALID_INDEX) - { - transport_endpoint_table_add (&tm->local_endpoints_table, tep, - tep - tm->local_endpoints); - return tep->port; - } - } - /* No free ports */ - pool_put (tm->local_endpoints, tep); - return -1; -} - /** * Initialize all connection timers as invalid */ @@ -297,295 +410,836 @@ tcp_connection_timers_reset (tcp_connection_t * tc) } } -/** Initialize tcp connection variables +#if 0 +typedef struct ip4_tcp_hdr +{ + ip4_header_t ip; + tcp_header_t tcp; +} ip4_tcp_hdr_t; + +typedef struct ip6_tcp_hdr +{ + ip6_header_t ip; + tcp_header_t tcp; +} ip6_tcp_hdr_t; + +static void +tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo, + dpo_id_t * result) +{ + const dpo_id_t *choice; + load_balance_t *lb; + int hash; + + lb = load_balance_get (dpo->dpoi_index); + if (tc->c_is_ip4) + { + ip4_tcp_hdr_t hdr; + clib_memset (&hdr, 0, sizeof (hdr)); + hdr.ip.protocol = IP_PROTOCOL_TCP; + hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32; + hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32; + hdr.tcp.src_port = tc->c_lcl_port; + hdr.tcp.dst_port = tc->c_rmt_port; + hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config); + } + else + { + ip6_tcp_hdr_t hdr; + clib_memset (&hdr, 0, sizeof (hdr)); + hdr.ip.protocol = IP_PROTOCOL_TCP; + clib_memcpy (&hdr.ip.src_address, &tc->c_lcl_ip.ip6, + sizeof (ip6_address_t)); + clib_memcpy (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6, + sizeof (ip6_address_t)); + hdr.tcp.src_port = tc->c_lcl_port; + hdr.tcp.dst_port = tc->c_rmt_port; + hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config); + } + choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1); + dpo_copy (result, choice); +} + +fib_node_index_t +tcp_lookup_rmt_in_fib (tcp_connection_t * tc) +{ + fib_prefix_t prefix; + u32 fib_index; + + clib_memcpy (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr)); + prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; + prefix.fp_len = tc->c_is_ip4 ? 32 : 128; + fib_index = fib_table_find (prefix.fp_proto, tc->c_fib_index); + return fib_table_lookup (fib_index, &prefix); +} + +static int +tcp_connection_stack_on_fib_entry (tcp_connection_t * tc) +{ + dpo_id_t choice = DPO_INVALID; + u32 output_node_index; + fib_entry_t *fe; + + fe = fib_entry_get (tc->c_rmt_fei); + if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE) + return -1; + + tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice); + + output_node_index = + tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index; + dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice); + return 0; +} + +/** Stack tcp connection on peer's fib entry. * - * Should be called after having received a msg from the peer, i.e., a SYN or - * a SYNACK, such that connection options have already been exchanged. */ + * This ultimately populates the dpo the connection will use to send packets. + */ +static void +tcp_connection_fib_attach (tcp_connection_t * tc) +{ + tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc); + + ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID); + + tcp_connection_stack_on_fib_entry (tc); +} +#endif /* 0 */ + +static void +tcp_cc_init (tcp_connection_t * tc) +{ + tc->cc_algo = tcp_cc_algo_get (TCP_CC_NEWRENO); + tc->cc_algo->init (tc); +} + void -tcp_connection_init_vars (tcp_connection_t * tc) +tcp_cc_algo_register (tcp_cc_algorithm_type_e type, + const tcp_cc_algorithm_t * vft) { - tcp_connection_timers_init (tc); - tcp_set_snd_mss (tc); - tc->sack_sb.head = TCP_INVALID_SACK_HOLE_INDEX; - tcp_cc_init (tc); + tcp_main_t *tm = vnet_get_tcp_main (); + vec_validate (tm->cc_algos, type); + + tm->cc_algos[type] = *vft; } -int -tcp_connection_open (ip46_address_t * rmt_addr, u16 rmt_port, u8 is_ip4) +tcp_cc_algorithm_t * +tcp_cc_algo_get (tcp_cc_algorithm_type_e type) { tcp_main_t *tm = vnet_get_tcp_main (); - tcp_connection_t *tc; - fib_prefix_t prefix; - u32 fei, sw_if_index; - ip46_address_t lcl_addr; - u16 lcl_port; + return &tm->cc_algos[type]; +} + + +/** + * Initialize connection send variables. + */ +void +tcp_init_snd_vars (tcp_connection_t * tc) +{ + u32 time_now; /* - * Find the local address and allocate port + * We use the time to randomize iss and for setting up the initial + * timestamp. Make sure it's updated otherwise syn and ack in the + * handshake may make it look as if time has flown in the opposite + * direction for us. */ - memset (&lcl_addr, 0, sizeof (lcl_addr)); + tcp_set_time_now (tcp_get_worker (vlib_get_thread_index ())); + time_now = tcp_time_now (); - /* Find a FIB path to the destination */ - clib_memcpy (&prefix.fp_addr, rmt_addr, sizeof (*rmt_addr)); - prefix.fp_proto = is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; - prefix.fp_len = is_ip4 ? 32 : 128; + tc->iss = random_u32 (&time_now); + tc->snd_una = tc->iss; + tc->snd_nxt = tc->iss + 1; + tc->snd_una_max = tc->snd_nxt; +} + +void +tcp_enable_pacing (tcp_connection_t * tc) +{ + u32 initial_bucket, byte_rate; + initial_bucket = 16 * tc->snd_mss; + byte_rate = 2 << 16; + transport_connection_tx_pacer_init (&tc->connection, byte_rate, + initial_bucket); + tc->mrtt_us = (u32) ~ 0; +} - fei = fib_table_lookup (0, &prefix); +/** Initialize tcp connection variables + * + * Should be called after having received a msg from the peer, i.e., a SYN or + * a SYNACK, such that connection options have already been exchanged. */ +void +tcp_connection_init_vars (tcp_connection_t * tc) +{ + tcp_connection_timers_init (tc); + tcp_init_mss (tc); + scoreboard_init (&tc->sack_sb); + tcp_cc_init (tc); + if (tc->state == TCP_STATE_SYN_RCVD) + tcp_init_snd_vars (tc); - /* Couldn't find route to destination. Bail out. */ - if (fei == FIB_NODE_INDEX_INVALID) - return -1; + if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6)) + tcp_add_del_adjacency (tc, 1); - sw_if_index = fib_entry_get_resolving_interface (fei); + /* tcp_connection_fib_attach (tc); */ - if (sw_if_index == (u32) ~ 0) - return -1; + if (transport_connection_is_tx_paced (&tc->connection) + || tcp_main.tx_pacing) + tcp_enable_pacing (tc); +} +static int +tcp_alloc_custom_local_endpoint (tcp_main_t * tm, ip46_address_t * lcl_addr, + u16 * lcl_port, u8 is_ip4) +{ + int index, port; if (is_ip4) { - ip4_address_t *ip4; - ip4 = ip_interface_get_first_ip (sw_if_index, 1); - lcl_addr.ip4.as_u32 = ip4->as_u32; + index = tm->last_v4_address_rotor++; + if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses)) + tm->last_v4_address_rotor = 0; + lcl_addr->ip4.as_u32 = tm->ip4_src_addresses[index].as_u32; } else { - ip6_address_t *ip6; - ip6 = ip_interface_get_first_ip (sw_if_index, 0); - clib_memcpy (&lcl_addr.ip6, ip6, sizeof (*ip6)); + index = tm->last_v6_address_rotor++; + if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses)) + tm->last_v6_address_rotor = 0; + clib_memcpy (&lcl_addr->ip6, &tm->ip6_src_addresses[index], + sizeof (ip6_address_t)); } - - /* Allocate source port */ - lcl_port = tcp_allocate_local_port (tm, &lcl_addr); - if (lcl_port < 1) + port = transport_alloc_local_port (TRANSPORT_PROTO_TCP, lcl_addr); + if (port < 1) { clib_warning ("Failed to allocate src port"); return -1; } + *lcl_port = port; + return 0; +} + +static int +tcp_session_open (transport_endpoint_cfg_t * rmt) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + tcp_connection_t *tc; + ip46_address_t lcl_addr; + u16 lcl_port; + int rv; /* - * Create connection and send SYN + * Allocate local endpoint */ + if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses)) + || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses))) + rv = tcp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port, + rmt->is_ip4); + else + rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_TCP, + rmt, &lcl_addr, &lcl_port); - pool_get (tm->half_open_connections, tc); - memset (tc, 0, sizeof (*tc)); + if (rv) + return -1; - clib_memcpy (&tc->c_rmt_ip, rmt_addr, sizeof (ip46_address_t)); - clib_memcpy (&tc->c_lcl_ip, &lcl_addr, sizeof (ip46_address_t)); - tc->c_rmt_port = clib_host_to_net_u16 (rmt_port); + /* + * Create connection and send SYN + */ + clib_spinlock_lock_if_init (&tm->half_open_lock); + tc = tcp_half_open_connection_new (); + ip_copy (&tc->c_rmt_ip, &rmt->ip, rmt->is_ip4); + ip_copy (&tc->c_lcl_ip, &lcl_addr, rmt->is_ip4); + tc->c_rmt_port = rmt->port; tc->c_lcl_port = clib_host_to_net_u16 (lcl_port); - tc->c_c_index = tc - tm->half_open_connections; - tc->c_is_ip4 = is_ip4; - + tc->c_is_ip4 = rmt->is_ip4; + tc->c_proto = TRANSPORT_PROTO_TCP; + tc->c_fib_index = rmt->fib_index; /* The other connection vars will be initialized after SYN ACK */ tcp_connection_timers_init (tc); - tcp_send_syn (tc); - + TCP_EVT_DBG (TCP_EVT_OPEN, tc); tc->state = TCP_STATE_SYN_SENT; + tcp_init_snd_vars (tc); + tcp_send_syn (tc); + clib_spinlock_unlock_if_init (&tm->half_open_lock); return tc->c_c_index; } -int -tcp_session_open_ip4 (ip46_address_t * addr, u16 port) -{ - return tcp_connection_open (addr, port, 1); -} +const char *tcp_dbg_evt_str[] = { +#define _(sym, str) str, + foreach_tcp_dbg_evt +#undef _ +}; -int -tcp_session_open_ip6 (ip46_address_t * addr, u16 port) -{ - return tcp_connection_open (addr, port, 0); -} +const char *tcp_fsm_states[] = { +#define _(sym, str) str, + foreach_tcp_fsm_state +#undef _ +}; u8 * -format_tcp_session_ip4 (u8 * s, va_list * args) +format_tcp_state (u8 * s, va_list * args) { - u32 tci = va_arg (*args, u32); - u32 thread_index = va_arg (*args, u32); - tcp_connection_t *tc; - - tc = tcp_connection_get (tci, thread_index); - - s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip4_address, - &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port), - format_ip4_address, &tc->c_rmt_ip4, - clib_net_to_host_u16 (tc->c_rmt_port)); + u32 state = va_arg (*args, u32); + if (state < TCP_N_STATES) + s = format (s, "%s", tcp_fsm_states[state]); + else + s = format (s, "UNKNOWN (%d (0x%x))", state, state); return s; } -u8 * -format_tcp_session_ip6 (u8 * s, va_list * args) +const char *tcp_connection_flags_str[] = { +#define _(sym, str) str, + foreach_tcp_connection_flag +#undef _ +}; + +static u8 * +format_tcp_connection_flags (u8 * s, va_list * args) { - u32 tci = va_arg (*args, u32); - u32 thread_index = va_arg (*args, u32); - tcp_connection_t *tc = tcp_connection_get (tci, thread_index); - s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip6_address, - &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port), - format_ip6_address, &tc->c_rmt_ip6, - clib_net_to_host_u16 (tc->c_rmt_port)); + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + int i, last = -1; + + for (i = 0; i < TCP_CONN_N_FLAG_BITS; i++) + if (tc->flags & (1 << i)) + last = i; + for (i = 0; i < last; i++) + { + if (tc->flags & (1 << i)) + s = format (s, "%s, ", tcp_connection_flags_str[i]); + } + if (last >= 0) + s = format (s, "%s", tcp_connection_flags_str[last]); return s; } -u8 * -format_tcp_listener_session_ip4 (u8 * s, va_list * args) +const char *tcp_conn_timers[] = { +#define _(sym, str) str, + foreach_tcp_timer +#undef _ +}; + +static u8 * +format_tcp_timers (u8 * s, va_list * args) { - u32 tci = va_arg (*args, u32); - tcp_connection_t *tc = tcp_listener_get (tci); - s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip4_address, - &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port), - format_ip4_address, &tc->c_rmt_ip4, - clib_net_to_host_u16 (tc->c_rmt_port)); + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + int i, last = -1; + + for (i = 0; i < TCP_N_TIMERS; i++) + if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID) + last = i; + + for (i = 0; i < last; i++) + { + if (tc->timers[i] != TCP_TIMER_HANDLE_INVALID) + s = format (s, "%s,", tcp_conn_timers[i]); + } + + if (last >= 0) + s = format (s, "%s", tcp_conn_timers[i]); + + return s; +} + +static u8 * +format_tcp_congestion_status (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + if (tcp_in_recovery (tc)) + s = format (s, "recovery"); + else if (tcp_in_fastrecovery (tc)) + s = format (s, "fastrecovery"); + else + s = format (s, "none"); + return s; +} + +static i32 +tcp_rcv_wnd_available (tcp_connection_t * tc) +{ + return (i32) tc->rcv_wnd - (tc->rcv_nxt - tc->rcv_las); +} + +static u8 * +format_tcp_congestion (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + u32 indent = format_get_indent (s); + + s = format (s, "%U ", format_tcp_congestion_status, tc); + s = format (s, "cwnd %u ssthresh %u rtx_bytes %u bytes_acked %u\n", + tc->cwnd, tc->ssthresh, tc->snd_rxt_bytes, tc->bytes_acked); + s = format (s, "%Ucc space %u prev_ssthresh %u snd_congestion %u" + " dupack %u\n", format_white_space, indent, + tcp_available_cc_snd_space (tc), tc->prev_ssthresh, + tc->snd_congestion - tc->iss, tc->rcv_dupacks); + s = format (s, "%Utsecr %u tsecr_last_ack %u limited_transmit %u\n", + format_white_space, indent, tc->rcv_opts.tsecr, + tc->tsecr_last_ack, tc->limited_transmit - tc->iss); + return s; +} + +static u8 * +format_tcp_vars (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + s = format (s, " index: %u flags: %U timers: %U\n", tc->c_c_index, + format_tcp_connection_flags, tc, format_tcp_timers, tc); + s = format (s, " snd_una %u snd_nxt %u snd_una_max %u", + tc->snd_una - tc->iss, tc->snd_nxt - tc->iss, + tc->snd_una_max - tc->iss); + s = format (s, " rcv_nxt %u rcv_las %u\n", + tc->rcv_nxt - tc->irs, tc->rcv_las - tc->irs); + s = format (s, " snd_wnd %u rcv_wnd %u rcv_wscale %u ", + tc->snd_wnd, tc->rcv_wnd, tc->rcv_wscale); + s = format (s, "snd_wl1 %u snd_wl2 %u\n", tc->snd_wl1 - tc->irs, + tc->snd_wl2 - tc->iss); + s = format (s, " flight size %u out space %u rcv_wnd_av %u\n", + tcp_flight_size (tc), tcp_available_output_snd_space (tc), + tcp_rcv_wnd_available (tc)); + s = format (s, " tsval_recent %u tsval_recent_age %u\n", tc->tsval_recent, + tcp_time_now () - tc->tsval_recent_age); + s = format (s, " rto %u rto_boff %u srtt %u rttvar %u rtt_ts %2.5f ", + tc->rto, tc->rto_boff, tc->srtt, tc->rttvar, tc->rtt_ts); + s = format (s, "rtt_seq %u\n", tc->rtt_seq - tc->iss); + s = format (s, " cong: %U", format_tcp_congestion, tc); + + if (tc->state >= TCP_STATE_ESTABLISHED) + { + s = format (s, " sboard: %U\n", format_tcp_scoreboard, &tc->sack_sb, + tc); + } + if (vec_len (tc->snd_sacks)) + s = format (s, " sacks tx: %U\n", format_tcp_sacks, tc); + + return s; +} + +static u8 * +format_tcp_connection_id (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + if (!tc) + return s; + if (tc->c_is_ip4) + { + s = format (s, "[%d:%d][%s] %U:%d->%U:%d", tc->c_thread_index, + tc->c_s_index, "T", format_ip4_address, &tc->c_lcl_ip4, + clib_net_to_host_u16 (tc->c_lcl_port), format_ip4_address, + &tc->c_rmt_ip4, clib_net_to_host_u16 (tc->c_rmt_port)); + } + else + { + s = format (s, "[%d:%d][%s] %U:%d->%U:%d", tc->c_thread_index, + tc->c_s_index, "T", format_ip6_address, &tc->c_lcl_ip6, + clib_net_to_host_u16 (tc->c_lcl_port), format_ip6_address, + &tc->c_rmt_ip6, clib_net_to_host_u16 (tc->c_rmt_port)); + } + return s; } u8 * -format_tcp_listener_session_ip6 (u8 * s, va_list * args) +format_tcp_connection (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + u32 verbose = va_arg (*args, u32); + + if (!tc) + return s; + s = format (s, "%-50U", format_tcp_connection_id, tc); + if (verbose) + { + s = format (s, "%-15U", format_tcp_state, tc->state); + if (verbose > 1) + s = format (s, "\n%U", format_tcp_vars, tc); + } + + return s; +} + +static u8 * +format_tcp_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); - tcp_connection_t *tc = tcp_listener_get (tci); - s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip6_address, - &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port), - format_ip6_address, &tc->c_rmt_ip6, - clib_net_to_host_u16 (tc->c_rmt_port)); + u32 thread_index = va_arg (*args, u32); + u32 verbose = va_arg (*args, u32); + tcp_connection_t *tc; + + tc = tcp_connection_get (tci, thread_index); + if (tc) + s = format (s, "%U", format_tcp_connection, tc, verbose); + else + s = format (s, "empty\n"); return s; } -u8 * -format_tcp_half_open_session_ip4 (u8 * s, va_list * args) +static u8 * +format_tcp_listener_session (u8 * s, va_list * args) +{ + u32 tci = va_arg (*args, u32); + tcp_connection_t *tc = tcp_listener_get (tci); + return format (s, "%U", format_tcp_connection_id, tc); +} + +static u8 * +format_tcp_half_open_session (u8 * s, va_list * args) { u32 tci = va_arg (*args, u32); tcp_connection_t *tc = tcp_half_open_connection_get (tci); - s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip4_address, - &tc->c_lcl_ip4, clib_net_to_host_u16 (tc->c_lcl_port), - format_ip4_address, &tc->c_rmt_ip4, - clib_net_to_host_u16 (tc->c_rmt_port)); + return format (s, "%U", format_tcp_connection_id, tc); +} + +u8 * +format_tcp_sacks (u8 * s, va_list * args) +{ + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + sack_block_t *sacks = tc->snd_sacks; + sack_block_t *block; + int i, len = 0; + + len = vec_len (sacks); + for (i = 0; i < len - 1; i++) + { + block = &sacks[i]; + s = format (s, " start %u end %u\n", block->start - tc->irs, + block->end - tc->irs); + } + if (len) + { + block = &sacks[len - 1]; + s = format (s, " start %u end %u", block->start - tc->irs, + block->end - tc->irs); + } return s; } u8 * -format_tcp_half_open_session_ip6 (u8 * s, va_list * args) +format_tcp_rcv_sacks (u8 * s, va_list * args) { - u32 tci = va_arg (*args, u32); - tcp_connection_t *tc = tcp_half_open_connection_get (tci); - s = format (s, "[%s] %U:%d->%U:%d", "tcp", format_ip6_address, - &tc->c_lcl_ip6, clib_net_to_host_u16 (tc->c_lcl_port), - format_ip6_address, &tc->c_rmt_ip6, - clib_net_to_host_u16 (tc->c_rmt_port)); + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + sack_block_t *sacks = tc->rcv_opts.sacks; + sack_block_t *block; + int i, len = 0; + + len = vec_len (sacks); + for (i = 0; i < len - 1; i++) + { + block = &sacks[i]; + s = format (s, " start %u end %u\n", block->start - tc->iss, + block->end - tc->iss); + } + if (len) + { + block = &sacks[len - 1]; + s = format (s, " start %u end %u", block->start - tc->iss, + block->end - tc->iss); + } + return s; +} + +static u8 * +format_tcp_sack_hole (u8 * s, va_list * args) +{ + sack_scoreboard_hole_t *hole = va_arg (*args, sack_scoreboard_hole_t *); + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + if (tc) + s = format (s, " [%u, %u]", hole->start - tc->iss, hole->end - tc->iss); + else + s = format (s, " [%u, %u]", hole->start, hole->end); return s; } -transport_connection_t * +u8 * +format_tcp_scoreboard (u8 * s, va_list * args) +{ + sack_scoreboard_t *sb = va_arg (*args, sack_scoreboard_t *); + tcp_connection_t *tc = va_arg (*args, tcp_connection_t *); + sack_scoreboard_hole_t *hole; + u32 indent = format_get_indent (s); + + s = format (s, "sacked_bytes %u last_sacked_bytes %u lost_bytes %u\n", + sb->sacked_bytes, sb->last_sacked_bytes, sb->lost_bytes); + s = format (s, "%Ulast_bytes_delivered %u high_sacked %u snd_una_adv %u\n", + format_white_space, indent, sb->last_bytes_delivered, + sb->high_sacked - tc->iss, sb->snd_una_adv); + s = format (s, "%Ucur_rxt_hole %u high_rxt %u rescue_rxt %u", + format_white_space, indent, sb->cur_rxt_hole, + sb->high_rxt - tc->iss, sb->rescue_rxt - tc->iss); + + hole = scoreboard_first_hole (sb); + if (hole) + s = format (s, "\n%Uhead %u tail %u %u holes:\n%U", format_white_space, + indent, sb->head, sb->tail, pool_elts (sb->holes), + format_white_space, indent); + + while (hole) + { + s = format (s, "%U", format_tcp_sack_hole, hole, tc); + hole = scoreboard_next_hole (sb, hole); + } + + return s; +} + +static transport_connection_t * tcp_session_get_transport (u32 conn_index, u32 thread_index) { tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index); return &tc->connection; } -transport_connection_t * +static transport_connection_t * tcp_half_open_session_get_transport (u32 conn_index) { tcp_connection_t *tc = tcp_half_open_connection_get (conn_index); return &tc->connection; } -u16 +/** + * Compute maximum segment size for session layer. + * + * Since the result needs to be the actual data length, it first computes + * the tcp options to be used in the next burst and subtracts their + * length from the connection's snd_mss. + */ +static u16 tcp_session_send_mss (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; + + /* Ensure snd_mss does accurately reflect the amount of data we can push + * in a segment. This also makes sure that options are updated according to + * the current state of the connection. */ + tcp_update_burst_snd_vars (tc); + return tc->snd_mss; } +always_inline u32 +tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space) +{ + if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss)) + { + return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0; + } + + /* If not snd_wnd constrained and we can't write at least a segment, + * don't try at all */ + if (PREDICT_FALSE (snd_space < tc->snd_mss)) + return snd_space < tc->cwnd ? 0 : snd_space; + + /* round down to mss multiple */ + return snd_space - (snd_space % tc->snd_mss); +} + +/** + * Compute tx window session is allowed to fill. + * + * Takes into account available send space, snd_mss and the congestion + * state of the connection. If possible, the value returned is a multiple + * of snd_mss. + * + * @param tc tcp connection + * @return number of bytes session is allowed to write + */ +static inline u32 +tcp_snd_space_inline (tcp_connection_t * tc) +{ + int snd_space, snt_limited; + + if (PREDICT_FALSE (tcp_in_fastrecovery (tc))) + return 0; + + snd_space = tcp_available_output_snd_space (tc); + + /* If we haven't gotten dupacks or if we did and have gotten sacked + * bytes then we can still send as per Limited Transmit (RFC3042) */ + if (PREDICT_FALSE (tc->rcv_dupacks != 0 + && (tcp_opts_sack_permitted (tc) + && tc->sack_sb.last_sacked_bytes == 0))) + { + if (tc->rcv_dupacks == 1 && tc->limited_transmit != tc->snd_nxt) + tc->limited_transmit = tc->snd_nxt; + ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt)); + + snt_limited = tc->snd_nxt - tc->limited_transmit; + snd_space = clib_max (2 * tc->snd_mss - snt_limited, 0); + } + return tcp_round_snd_space (tc, snd_space); +} + u32 +tcp_snd_space (tcp_connection_t * tc) +{ + return tcp_snd_space_inline (tc); +} + +static u32 tcp_session_send_space (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; - return tcp_available_snd_space (tc); + return clib_min (tcp_snd_space_inline (tc), + tc->snd_wnd - (tc->snd_nxt - tc->snd_una)); } -u32 -tcp_session_rx_fifo_offset (transport_connection_t * trans_conn) +static u32 +tcp_session_tx_fifo_offset (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; - return (tc->snd_una_max - tc->snd_una); + + ASSERT (seq_geq (tc->snd_nxt, tc->snd_una)); + + /* This still works if fast retransmit is on */ + return (tc->snd_nxt - tc->snd_una); } -/* *INDENT-OFF* */ -const static transport_proto_vft_t tcp4_proto = { - .bind = tcp_session_bind_ip4, - .unbind = tcp_session_unbind_ip4, - .push_header = tcp_push_header, - .get_connection = tcp_session_get_transport, - .get_listener = tcp_session_get_listener, - .get_half_open = tcp_half_open_session_get_transport, - .open = tcp_session_open_ip4, - .close = tcp_session_close, - .cleanup = tcp_session_cleanup, - .send_mss = tcp_session_send_mss, - .send_space = tcp_session_send_space, - .rx_fifo_offset = tcp_session_rx_fifo_offset, - .format_connection = format_tcp_session_ip4, - .format_listener = format_tcp_listener_session_ip4, - .format_half_open = format_tcp_half_open_session_ip4 -}; +static void +tcp_update_time (f64 now, u8 thread_index) +{ + tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); + + tcp_set_time_now (wrk); + tw_timer_expire_timers_16t_2w_512sl (&wrk->timer_wheel, now); + tcp_do_fastretransmits (wrk); + tcp_send_acks (wrk); + tcp_flush_frames_to_output (wrk); +} + +static u32 +tcp_session_push_header (transport_connection_t * tconn, vlib_buffer_t * b) +{ + tcp_connection_t *tc = (tcp_connection_t *) tconn; + return tcp_push_header (tc, b); +} -const static transport_proto_vft_t tcp6_proto = { - .bind = tcp_session_bind_ip6, - .unbind = tcp_session_unbind_ip6, - .push_header = tcp_push_header, +/* *INDENT-OFF* */ +const static transport_proto_vft_t tcp_proto = { + .enable = vnet_tcp_enable_disable, + .bind = tcp_session_bind, + .unbind = tcp_session_unbind, + .push_header = tcp_session_push_header, .get_connection = tcp_session_get_transport, .get_listener = tcp_session_get_listener, .get_half_open = tcp_half_open_session_get_transport, - .open = tcp_session_open_ip6, + .open = tcp_session_open, .close = tcp_session_close, .cleanup = tcp_session_cleanup, .send_mss = tcp_session_send_mss, .send_space = tcp_session_send_space, - .rx_fifo_offset = tcp_session_rx_fifo_offset, - .format_connection = format_tcp_session_ip6, - .format_listener = format_tcp_listener_session_ip6, - .format_half_open = format_tcp_half_open_session_ip6 + .update_time = tcp_update_time, + .tx_fifo_offset = tcp_session_tx_fifo_offset, + .format_connection = format_tcp_session, + .format_listener = format_tcp_listener_session, + .format_half_open = format_tcp_half_open_session, + .tx_type = TRANSPORT_TX_PEEK, + .service_type = TRANSPORT_SERVICE_VC, }; /* *INDENT-ON* */ void +tcp_connection_tx_pacer_update (tcp_connection_t * tc) +{ + f64 srtt; + u64 rate; + + if (!transport_connection_is_tx_paced (&tc->connection)) + return; + + srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us); + /* TODO should constrain to interface's max throughput but + * we don't have link speeds for sw ifs ..*/ + rate = tc->cwnd / srtt; + transport_connection_tx_pacer_update (&tc->connection, rate); +} + +void +tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window, + u32 start_bucket) +{ + tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); + u32 byte_rate = window / ((f64) TCP_TICK * tc->srtt); + u64 last_time = wrk->vm->clib_time.last_cpu_time; + transport_connection_tx_pacer_reset (&tc->connection, byte_rate, + start_bucket, last_time); +} + +static void tcp_timer_keep_handler (u32 conn_index) { - u32 cpu_index = os_get_cpu_number (); + u32 thread_index = vlib_get_thread_index (); tcp_connection_t *tc; - tc = tcp_connection_get (conn_index, cpu_index); + tc = tcp_connection_get (conn_index, thread_index); tc->timers[TCP_TIMER_KEEP] = TCP_TIMER_HANDLE_INVALID; tcp_connection_close (tc); } -void +static void tcp_timer_establish_handler (u32 conn_index) { tcp_connection_t *tc; - u8 sst; tc = tcp_half_open_connection_get (conn_index); + if (tc) + { + ASSERT (tc->state == TCP_STATE_SYN_SENT); + session_stream_connect_notify (&tc->connection, 1 /* fail */ ); + TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2); + } + else + { + tc = tcp_connection_get (conn_index, vlib_get_thread_index ()); + /* note: the connection may have already disappeared */ + if (PREDICT_FALSE (tc == 0)) + return; + TCP_DBG ("establish pop: %U", format_tcp_connection, tc, 2); + ASSERT (tc->state == TCP_STATE_SYN_RCVD); + /* Start cleanup. App wasn't notified yet so use delete notify as + * opposed to delete to cleanup session layer state. */ + stream_session_delete_notify (&tc->connection); + } tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID; - - ASSERT (tc->state == TCP_STATE_SYN_SENT); - - sst = tc->c_is_ip4 ? SESSION_TYPE_IP4_TCP : SESSION_TYPE_IP6_TCP; - stream_session_connect_notify (&tc->connection, sst, 1 /* fail */ ); - tcp_connection_cleanup (tc); } -void -tcp_timer_2msl_handler (u32 conn_index) +static void +tcp_timer_waitclose_handler (u32 conn_index) { - u32 cpu_index = os_get_cpu_number (); + u32 thread_index = vlib_get_thread_index (); tcp_connection_t *tc; - tc = tcp_connection_get (conn_index, cpu_index); - tc->timers[TCP_TIMER_2MSL] = TCP_TIMER_HANDLE_INVALID; + tc = tcp_connection_get (conn_index, thread_index); + if (!tc) + return; + tc->timers[TCP_TIMER_WAITCLOSE] = TCP_TIMER_HANDLE_INVALID; + + /* Session didn't come back with a close(). Send FIN either way + * and switch to LAST_ACK. */ + if (tc->state == TCP_STATE_CLOSE_WAIT) + { + if (tc->flags & TCP_CONN_FINSNT) + { + clib_warning ("FIN was sent and still in CLOSE WAIT. Weird!"); + } + + /* Make sure we don't try to send unsent data */ + tcp_connection_timers_reset (tc); + tcp_cong_recovery_off (tc); + tc->snd_una_max = tc->snd_nxt = tc->snd_una; + tcp_send_fin (tc); + tc->state = TCP_STATE_LAST_ACK; + + /* Make sure we don't wait in LAST ACK forever */ + tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, TCP_2MSL_TIME); + + /* Don't delete the connection yet */ + return; + } tcp_connection_del (tc); } @@ -595,9 +1249,9 @@ static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] = { tcp_timer_retransmit_handler, tcp_timer_delack_handler, - 0, + tcp_timer_persist_handler, tcp_timer_keep_handler, - tcp_timer_2msl_handler, + tcp_timer_waitclose_handler, tcp_timer_retransmit_syn_handler, tcp_timer_establish_handler }; @@ -615,35 +1269,36 @@ tcp_expired_timers_dispatch (u32 * expired_timers) connection_index = expired_timers[i] & 0x0FFFFFFF; timer_id = expired_timers[i] >> 28; + TCP_EVT_DBG (TCP_EVT_TIMER_POP, connection_index, timer_id); + /* Handle expiration */ (*timer_expiration_handlers[timer_id]) (connection_index); } } -void +static void tcp_initialize_timer_wheels (tcp_main_t * tm) { tw_timer_wheel_16t_2w_512sl_t *tw; - vec_foreach (tw, tm->timer_wheels) - { + /* *INDENT-OFF* */ + foreach_vlib_main (({ + tw = &tm->wrk_ctx[ii].timer_wheel; tw_timer_wheel_init_16t_2w_512sl (tw, tcp_expired_timers_dispatch, 100e-3 /* timer period 100ms */ , ~0); - tw->last_run_time = vlib_time_now (tm->vlib_main); - } + tw->last_run_time = vlib_time_now (this_vlib_main); + })); + /* *INDENT-ON* */ } -clib_error_t * -tcp_init (vlib_main_t * vm) +static clib_error_t * +tcp_main_enable (vlib_main_t * vm) { - ip_main_t *im = &ip_main; - ip_protocol_info_t *pi; - tcp_main_t *tm = vnet_get_tcp_main (); vlib_thread_main_t *vtm = vlib_get_thread_main (); + u32 num_threads, n_workers, prealloc_conn_per_wrk; + tcp_connection_t *tc __attribute__ ((unused)); + tcp_main_t *tm = vnet_get_tcp_main (); clib_error_t *error = 0; - u32 num_threads; - - tm->vlib_main = vm; - tm->vnet_main = vnet_get_main (); + int thread; if ((error = vlib_call_init_function (vm, ip_main_init))) return error; @@ -656,18 +1311,8 @@ tcp_init (vlib_main_t * vm) * Registrations */ - /* Register with IP */ - pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP); - if (pi == 0) - return clib_error_return (0, "TCP protocol info AWOL"); - pi->format_header = format_tcp_header; - pi->unformat_pg_edit = unformat_pg_tcp_header; - ip4_register_protocol (IP_PROTOCOL_TCP, tcp4_input_node.index); - - /* Register as transport with URI */ - session_register_transport (SESSION_TYPE_IP4_TCP, &tcp4_proto); - session_register_transport (SESSION_TYPE_IP6_TCP, &tcp6_proto); + ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_input_node.index); /* * Initialize data structures @@ -675,30 +1320,618 @@ tcp_init (vlib_main_t * vm) num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (tm->connections, num_threads - 1); + vec_validate (tm->wrk_ctx, num_threads - 1); + n_workers = num_threads == 1 ? 1 : vtm->n_threads; + prealloc_conn_per_wrk = tm->preallocated_connections / n_workers; - /* Initialize per worker thread tx buffers (used for control messages) */ - vec_validate (tm->tx_buffers, num_threads - 1); - - /* Initialize timer wheels */ - vec_validate (tm->timer_wheels, num_threads - 1); - tcp_initialize_timer_wheels (tm); + for (thread = 0; thread < num_threads; thread++) + { + vec_validate (tm->wrk_ctx[thread].pending_fast_rxt, 255); + vec_validate (tm->wrk_ctx[thread].ongoing_fast_rxt, 255); + vec_validate (tm->wrk_ctx[thread].postponed_fast_rxt, 255); + vec_validate (tm->wrk_ctx[thread].pending_deq_acked, 255); + vec_validate (tm->wrk_ctx[thread].pending_acks, 255); + vec_reset_length (tm->wrk_ctx[thread].pending_fast_rxt); + vec_reset_length (tm->wrk_ctx[thread].ongoing_fast_rxt); + vec_reset_length (tm->wrk_ctx[thread].postponed_fast_rxt); + vec_reset_length (tm->wrk_ctx[thread].pending_deq_acked); + vec_reset_length (tm->wrk_ctx[thread].pending_acks); + tm->wrk_ctx[thread].vm = vlib_mains[thread]; + + /* + * Preallocate connections. Assume that thread 0 won't + * use preallocated threads when running multi-core + */ + if ((thread > 0 || num_threads == 1) && prealloc_conn_per_wrk) + pool_init_fixed (tm->connections[thread], prealloc_conn_per_wrk); + } - vec_validate (tm->delack_connections, num_threads - 1); + /* + * Use a preallocated half-open connection pool? + */ + if (tm->preallocated_half_open_connections) + pool_init_fixed (tm->half_open_connections, + tm->preallocated_half_open_connections); /* Initialize clocks per tick for TCP timestamp. Used to compute * monotonically increasing timestamps. */ tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock / TCP_TSTAMP_RESOLUTION; - clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoint table", - 200000 /* $$$$ config parameter nbuckets */ , - (64 << 20) /*$$$ config parameter table size */ ); + if (num_threads > 1) + { + clib_spinlock_init (&tm->half_open_lock); + } + + tcp_initialize_timer_wheels (tm); + + tm->bytes_per_buffer = vlib_buffer_free_list_buffer_size + (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); return error; } +clib_error_t * +vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en) +{ + if (is_en) + { + if (tcp_main.is_enabled) + return 0; + + return tcp_main_enable (vm); + } + else + { + tcp_main.is_enabled = 0; + } + + return 0; +} + +void +tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add) +{ + tcp_main_t *tm = &tcp_main; + if (is_ip4) + tm->punt_unknown4 = is_add; + else + tm->punt_unknown6 = is_add; +} + +static clib_error_t * +tcp_init (vlib_main_t * vm) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + ip_main_t *im = &ip_main; + ip_protocol_info_t *pi; + + /* Session layer, and by implication tcp, are disabled by default */ + tm->is_enabled = 0; + + /* Register with IP for header parsing */ + pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP); + if (pi == 0) + return clib_error_return (0, "TCP protocol info AWOL"); + pi->format_header = format_tcp_header; + pi->unformat_pg_edit = unformat_pg_tcp_header; + + /* Register as transport with session layer */ + transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto, + FIB_PROTOCOL_IP4, tcp4_output_node.index); + transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto, + FIB_PROTOCOL_IP6, tcp6_output_node.index); + + tcp_api_reference (); + tm->tx_pacing = 1; + return 0; +} + VLIB_INIT_FUNCTION (tcp_init); +static clib_error_t * +tcp_config_fn (vlib_main_t * vm, unformat_input_t * input) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "preallocated-connections %d", + &tm->preallocated_connections)) + ; + else if (unformat (input, "preallocated-half-open-connections %d", + &tm->preallocated_half_open_connections)) + ; + else if (unformat (input, "buffer-fail-fraction %f", + &tm->buffer_fail_fraction)) + ; + else if (unformat (input, "max-rx-fifo %U", unformat_memory_size, + &tm->max_rx_fifo)) + ; + else if (unformat (input, "no-tx-pacing")) + tm->tx_pacing = 0; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + return 0; +} + +VLIB_CONFIG_FUNCTION (tcp_config_fn, "tcp"); + + +/** + * \brief Configure an ipv4 source address range + * @param vm vlib_main_t pointer + * @param start first ipv4 address in the source address range + * @param end last ipv4 address in the source address range + * @param table_id VRF / table ID, 0 for the default FIB + * @return 0 if all OK, else an error indication from api_errno.h + */ + +int +tcp_configure_v4_source_address_range (vlib_main_t * vm, + ip4_address_t * start, + ip4_address_t * end, u32 table_id) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + vnet_main_t *vnm = vnet_get_main (); + u32 start_host_byte_order, end_host_byte_order; + fib_prefix_t prefix; + vnet_sw_interface_t *si; + fib_node_index_t fei; + u32 fib_index = 0; + u32 sw_if_index; + int rv; + int vnet_proxy_arp_add_del (ip4_address_t * lo_addr, + ip4_address_t * hi_addr, u32 fib_index, + int is_del); + + clib_memset (&prefix, 0, sizeof (prefix)); + + fib_index = fib_table_find (FIB_PROTOCOL_IP4, table_id); + + if (fib_index == ~0) + return VNET_API_ERROR_NO_SUCH_FIB; + + start_host_byte_order = clib_net_to_host_u32 (start->as_u32); + end_host_byte_order = clib_net_to_host_u32 (end->as_u32); + + /* sanity check for reversed args or some such */ + if ((end_host_byte_order - start_host_byte_order) > (10 << 10)) + return VNET_API_ERROR_INVALID_ARGUMENT; + + /* Lookup the last address, to identify the interface involved */ + prefix.fp_len = 32; + prefix.fp_proto = FIB_PROTOCOL_IP4; + memcpy (&prefix.fp_addr.ip4, end, sizeof (ip4_address_t)); + + fei = fib_table_lookup (fib_index, &prefix); + + /* Couldn't find route to destination. Bail out. */ + if (fei == FIB_NODE_INDEX_INVALID) + return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB; + + sw_if_index = fib_entry_get_resolving_interface (fei); + + /* Enable proxy arp on the interface */ + si = vnet_get_sw_interface (vnm, sw_if_index); + si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP; + + /* Configure proxy arp across the range */ + rv = vnet_proxy_arp_add_del (start, end, fib_index, 0 /* is_del */ ); + + if (rv) + return rv; + + do + { + dpo_id_t dpo = DPO_INVALID; + + vec_add1 (tm->ip4_src_addresses, start[0]); + + /* Add local adjacencies for the range */ + + receive_dpo_add_or_lock (DPO_PROTO_IP4, ~0 /* sw_if_index */ , + NULL, &dpo); + prefix.fp_len = 32; + prefix.fp_proto = FIB_PROTOCOL_IP4; + prefix.fp_addr.ip4.as_u32 = start->as_u32; + + fib_table_entry_special_dpo_update (fib_index, + &prefix, + FIB_SOURCE_API, + FIB_ENTRY_FLAG_EXCLUSIVE, &dpo); + dpo_reset (&dpo); + + start_host_byte_order++; + start->as_u32 = clib_host_to_net_u32 (start_host_byte_order); + } + while (start_host_byte_order <= end_host_byte_order); + + return 0; +} + +/** + * \brief Configure an ipv6 source address range + * @param vm vlib_main_t pointer + * @param start first ipv6 address in the source address range + * @param end last ipv6 address in the source address range + * @param table_id VRF / table ID, 0 for the default FIB + * @return 0 if all OK, else an error indication from api_errno.h + */ + +int +tcp_configure_v6_source_address_range (vlib_main_t * vm, + ip6_address_t * start, + ip6_address_t * end, u32 table_id) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + fib_prefix_t prefix; + u32 fib_index = 0; + fib_node_index_t fei; + u32 sw_if_index; + + clib_memset (&prefix, 0, sizeof (prefix)); + + fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id); + + if (fib_index == ~0) + return VNET_API_ERROR_NO_SUCH_FIB; + + while (1) + { + int i; + ip6_address_t tmp; + dpo_id_t dpo = DPO_INVALID; + + /* Remember this address */ + vec_add1 (tm->ip6_src_addresses, start[0]); + + /* Lookup the prefix, to identify the interface involved */ + prefix.fp_len = 128; + prefix.fp_proto = FIB_PROTOCOL_IP6; + memcpy (&prefix.fp_addr.ip6, start, sizeof (ip6_address_t)); + + fei = fib_table_lookup (fib_index, &prefix); + + /* Couldn't find route to destination. Bail out. */ + if (fei == FIB_NODE_INDEX_INVALID) + return VNET_API_ERROR_NEXT_HOP_NOT_IN_FIB; + + sw_if_index = fib_entry_get_resolving_interface (fei); + + if (sw_if_index == (u32) ~ 0) + return VNET_API_ERROR_NO_MATCHING_INTERFACE; + + /* Add a proxy neighbor discovery entry for this address */ + ip6_neighbor_proxy_add_del (sw_if_index, start, 0 /* is_del */ ); + + /* Add a receive adjacency for this address */ + receive_dpo_add_or_lock (DPO_PROTO_IP6, ~0 /* sw_if_index */ , + NULL, &dpo); + + fib_table_entry_special_dpo_update (fib_index, + &prefix, + FIB_SOURCE_API, + FIB_ENTRY_FLAG_EXCLUSIVE, &dpo); + dpo_reset (&dpo); + + /* Done with the entire range? */ + if (!memcmp (start, end, sizeof (start[0]))) + break; + + /* Increment the address. DGMS. */ + tmp = start[0]; + for (i = 15; i >= 0; i--) + { + tmp.as_u8[i] += 1; + if (tmp.as_u8[i] != 0) + break; + } + start[0] = tmp; + } + return 0; +} + +static clib_error_t * +tcp_src_address (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd_arg) +{ + ip4_address_t v4start, v4end; + ip6_address_t v6start, v6end; + u32 table_id = 0; + int v4set = 0; + int v6set = 0; + int rv; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U - %U", unformat_ip4_address, &v4start, + unformat_ip4_address, &v4end)) + v4set = 1; + else if (unformat (input, "%U", unformat_ip4_address, &v4start)) + { + memcpy (&v4end, &v4start, sizeof (v4start)); + v4set = 1; + } + else if (unformat (input, "%U - %U", unformat_ip6_address, &v6start, + unformat_ip6_address, &v6end)) + v6set = 1; + else if (unformat (input, "%U", unformat_ip6_address, &v6start)) + { + memcpy (&v6end, &v6start, sizeof (v6start)); + v6set = 1; + } + else if (unformat (input, "fib-table %d", &table_id)) + ; + else + break; + } + + if (!v4set && !v6set) + return clib_error_return (0, "at least one v4 or v6 address required"); + + if (v4set) + { + rv = tcp_configure_v4_source_address_range (vm, &v4start, &v4end, + table_id); + switch (rv) + { + case 0: + break; + + case VNET_API_ERROR_NO_SUCH_FIB: + return clib_error_return (0, "Invalid table-id %d", table_id); + + case VNET_API_ERROR_INVALID_ARGUMENT: + return clib_error_return (0, "Invalid address range %U - %U", + format_ip4_address, &v4start, + format_ip4_address, &v4end); + default: + return clib_error_return (0, "error %d", rv); + break; + } + } + if (v6set) + { + rv = tcp_configure_v6_source_address_range (vm, &v6start, &v6end, + table_id); + switch (rv) + { + case 0: + break; + + case VNET_API_ERROR_NO_SUCH_FIB: + return clib_error_return (0, "Invalid table-id %d", table_id); + + default: + return clib_error_return (0, "error %d", rv); + break; + } + } + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tcp_src_address_command, static) = +{ + .path = "tcp src-address", + .short_help = "tcp src-address [- ] add src address range", + .function = tcp_src_address, +}; +/* *INDENT-ON* */ + +static u8 * +tcp_scoreboard_dump_trace (u8 * s, sack_scoreboard_t * sb) +{ +#if TCP_SCOREBOARD_TRACE + + scoreboard_trace_elt_t *block; + int i = 0; + + if (!sb->trace) + return s; + + s = format (s, "scoreboard trace:"); + vec_foreach (block, sb->trace) + { + s = format (s, "{%u, %u, %u, %u, %u}, ", block->start, block->end, + block->ack, block->snd_una_max, block->group); + if ((++i % 3) == 0) + s = format (s, "\n"); + } + return s; +#else + return 0; +#endif +} + +static clib_error_t * +tcp_show_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd_arg) +{ + transport_connection_t *tconn = 0; + tcp_connection_t *tc; + u8 *s = 0; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_transport_connection, &tconn, + TRANSPORT_PROTO_TCP)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + if (!TCP_SCOREBOARD_TRACE) + { + vlib_cli_output (vm, "scoreboard tracing not enabled"); + return 0; + } + + tc = tcp_get_connection_from_transport (tconn); + s = tcp_scoreboard_dump_trace (s, &tc->sack_sb); + vlib_cli_output (vm, "%v", s); + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command, static) = +{ + .path = "show tcp scoreboard trace", + .short_help = "show tcp scoreboard trace ", + .function = tcp_show_scoreboard_trace_fn, +}; +/* *INDENT-ON* */ + +u8 * +tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose) +{ + int i, trace_len; + scoreboard_trace_elt_t *trace; + u32 next_ack, left, group, has_new_ack = 0; + tcp_connection_t _dummy_tc, *dummy_tc = &_dummy_tc; + sack_block_t *block; + + if (!TCP_SCOREBOARD_TRACE) + { + s = format (s, "scoreboard tracing not enabled"); + return s; + } + + if (!tc) + return s; + + clib_memset (dummy_tc, 0, sizeof (*dummy_tc)); + tcp_connection_timers_init (dummy_tc); + scoreboard_init (&dummy_tc->sack_sb); + dummy_tc->rcv_opts.flags |= TCP_OPTS_FLAG_SACK; + +#if TCP_SCOREBOARD_TRACE + trace = tc->sack_sb.trace; + trace_len = vec_len (tc->sack_sb.trace); +#endif + + for (i = 0; i < trace_len; i++) + { + if (trace[i].ack != 0) + { + dummy_tc->snd_una = trace[i].ack - 1448; + dummy_tc->snd_una_max = trace[i].ack; + } + } + + left = 0; + while (left < trace_len) + { + group = trace[left].group; + vec_reset_length (dummy_tc->rcv_opts.sacks); + has_new_ack = 0; + while (trace[left].group == group) + { + if (trace[left].ack != 0) + { + if (verbose) + s = format (s, "Adding ack %u, snd_una_max %u, segs: ", + trace[left].ack, trace[left].snd_una_max); + dummy_tc->snd_una_max = trace[left].snd_una_max; + next_ack = trace[left].ack; + has_new_ack = 1; + } + else + { + if (verbose) + s = format (s, "[%u, %u], ", trace[left].start, + trace[left].end); + vec_add2 (dummy_tc->rcv_opts.sacks, block, 1); + block->start = trace[left].start; + block->end = trace[left].end; + } + left++; + } + + /* Push segments */ + tcp_rcv_sacks (dummy_tc, next_ack); + if (has_new_ack) + dummy_tc->snd_una = next_ack + dummy_tc->sack_sb.snd_una_adv; + + if (verbose) + s = format (s, "result: %U", format_tcp_scoreboard, + &dummy_tc->sack_sb); + + } + s = format (s, "result: %U", format_tcp_scoreboard, &dummy_tc->sack_sb); + + return s; +} + +static clib_error_t * +tcp_scoreboard_trace_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd_arg) +{ + transport_connection_t *tconn = 0; + tcp_connection_t *tc = 0; + u8 *str = 0; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_transport_connection, &tconn, + TRANSPORT_PROTO_TCP)) + ; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + if (!TCP_SCOREBOARD_TRACE) + { + vlib_cli_output (vm, "scoreboard tracing not enabled"); + return 0; + } + + tc = tcp_get_connection_from_transport (tconn); + if (!tc) + { + vlib_cli_output (vm, "connection not found"); + return 0; + } + str = tcp_scoreboard_replay (str, tc, 1); + vlib_cli_output (vm, "%v", str); + return 0; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (tcp_replay_scoreboard_command, static) = +{ + .path = "tcp replay scoreboard", + .short_help = "tcp replay scoreboard ", + .function = tcp_scoreboard_trace_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +show_tcp_punt_fn (vlib_main_t * vm, unformat_input_t * input, + vlib_cli_command_t * cmd_arg) +{ + tcp_main_t *tm = vnet_get_tcp_main (); + if (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + return clib_error_return (0, "unknown input `%U'", format_unformat_error, + input); + vlib_cli_output (vm, "IPv4 TCP punt: %s", + tm->punt_unknown4 ? "enabled" : "disabled"); + vlib_cli_output (vm, "IPv6 TCP punt: %s", + tm->punt_unknown6 ? "enabled" : "disabled"); + return 0; +} +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (show_tcp_punt_command, static) = +{ + .path = "show tcp punt", + .short_help = "show tcp punt", + .function = show_tcp_punt_fn, +}; +/* *INDENT-ON* */ + /* * fd.io coding-style-patch-verification: ON *