Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
Florin Coras | 222e1f41 | 2019-02-16 20:47:32 -0800 | [diff] [blame] | 2 | * Copyright (c) 2016-2019 Cisco and/or its affiliates. |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
Dave Barach | 3bbcfab | 2017-08-15 19:03:44 -0400 | [diff] [blame] | 16 | /** |
| 17 | * @file |
| 18 | * @brief TCP host stack utilities |
| 19 | */ |
| 20 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 21 | #include <vnet/tcp/tcp.h> |
Florin Coras | 999840c | 2020-03-18 20:31:34 +0000 | [diff] [blame] | 22 | #include <vnet/tcp/tcp_inlines.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 23 | #include <vnet/session/session.h> |
| 24 | #include <vnet/fib/fib.h> |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 25 | #include <vnet/dpo/load_balance.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 26 | #include <math.h> |
| 27 | |
Florin Coras | 6052f4b | 2023-06-21 20:02:25 -0700 | [diff] [blame] | 28 | #include <vlib/stats/stats.h> |
| 29 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 30 | tcp_main_t tcp_main; |
| 31 | |
Florin Coras | 1c8ff63 | 2018-05-17 13:28:34 -0700 | [diff] [blame] | 32 | typedef struct |
| 33 | { |
| 34 | fib_protocol_t nh_proto; |
| 35 | vnet_link_t link_type; |
| 36 | ip46_address_t ip; |
| 37 | u32 sw_if_index; |
| 38 | u8 is_add; |
| 39 | } tcp_add_del_adj_args_t; |
| 40 | |
| 41 | static void |
| 42 | tcp_add_del_adj_cb (tcp_add_del_adj_args_t * args) |
| 43 | { |
| 44 | u32 ai; |
| 45 | if (args->is_add) |
| 46 | { |
| 47 | adj_nbr_add_or_lock (args->nh_proto, args->link_type, &args->ip, |
| 48 | args->sw_if_index); |
| 49 | } |
| 50 | else |
| 51 | { |
| 52 | ai = adj_nbr_find (FIB_PROTOCOL_IP6, VNET_LINK_IP6, &args->ip, |
| 53 | args->sw_if_index); |
| 54 | if (ai != ADJ_INDEX_INVALID) |
| 55 | adj_unlock (ai); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | static void |
| 60 | tcp_add_del_adjacency (tcp_connection_t * tc, u8 is_add) |
| 61 | { |
| 62 | tcp_add_del_adj_args_t args = { |
| 63 | .nh_proto = FIB_PROTOCOL_IP6, |
| 64 | .link_type = VNET_LINK_IP6, |
| 65 | .ip = tc->c_rmt_ip, |
| 66 | .sw_if_index = tc->sw_if_index, |
| 67 | .is_add = is_add |
| 68 | }; |
| 69 | vlib_rpc_call_main_thread (tcp_add_del_adj_cb, (u8 *) & args, |
| 70 | sizeof (args)); |
| 71 | } |
| 72 | |
Florin Coras | d9a145f | 2019-06-07 09:35:20 -0700 | [diff] [blame] | 73 | static void |
| 74 | tcp_cc_init (tcp_connection_t * tc) |
| 75 | { |
Florin Coras | c814435 | 2022-01-06 11:58:24 -0800 | [diff] [blame] | 76 | /* As per RFC 6582 initialize "recover" to iss */ |
| 77 | if (tcp_opts_sack_permitted (&tc->rcv_opts)) |
| 78 | tc->snd_congestion = tc->iss; |
| 79 | |
Florin Coras | d9a145f | 2019-06-07 09:35:20 -0700 | [diff] [blame] | 80 | tc->cc_algo->init (tc); |
| 81 | } |
| 82 | |
| 83 | static void |
| 84 | tcp_cc_cleanup (tcp_connection_t * tc) |
| 85 | { |
| 86 | if (tc->cc_algo->cleanup) |
| 87 | tc->cc_algo->cleanup (tc); |
| 88 | } |
| 89 | |
| 90 | void |
| 91 | tcp_cc_algo_register (tcp_cc_algorithm_type_e type, |
| 92 | const tcp_cc_algorithm_t * vft) |
| 93 | { |
| 94 | tcp_main_t *tm = vnet_get_tcp_main (); |
| 95 | vec_validate (tm->cc_algos, type); |
| 96 | |
| 97 | tm->cc_algos[type] = *vft; |
| 98 | hash_set_mem (tm->cc_algo_by_name, vft->name, type); |
| 99 | } |
| 100 | |
| 101 | tcp_cc_algorithm_t * |
| 102 | tcp_cc_algo_get (tcp_cc_algorithm_type_e type) |
| 103 | { |
| 104 | tcp_main_t *tm = vnet_get_tcp_main (); |
| 105 | return &tm->cc_algos[type]; |
| 106 | } |
| 107 | |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 108 | tcp_cc_algorithm_type_e |
| 109 | tcp_cc_algo_new_type (const tcp_cc_algorithm_t * vft) |
| 110 | { |
| 111 | tcp_main_t *tm = vnet_get_tcp_main (); |
| 112 | tcp_cc_algo_register (++tm->cc_last_type, vft); |
| 113 | return tm->cc_last_type; |
| 114 | } |
| 115 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 116 | static u32 |
Florin Coras | 0bce71e | 2022-02-10 11:57:06 -0800 | [diff] [blame] | 117 | tcp_connection_bind (u32 session_index, transport_endpoint_cfg_t *lcl) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 118 | { |
| 119 | tcp_main_t *tm = &tcp_main; |
| 120 | tcp_connection_t *listener; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 121 | void *iface_ip; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 122 | |
| 123 | pool_get (tm->listener_pool, listener); |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 124 | clib_memset (listener, 0, sizeof (*listener)); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 125 | |
| 126 | listener->c_c_index = listener - tm->listener_pool; |
Florin Coras | 0e49568 | 2017-09-19 22:27:18 -0700 | [diff] [blame] | 127 | listener->c_lcl_port = lcl->port; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 128 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 129 | /* If we are provided a sw_if_index, bind using one of its ips */ |
| 130 | if (ip_is_zero (&lcl->ip, 1) && lcl->sw_if_index != ENDPOINT_INVALID_INDEX) |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 131 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 132 | if ((iface_ip = ip_interface_get_first_ip (lcl->sw_if_index, |
| 133 | lcl->is_ip4))) |
| 134 | ip_set (&lcl->ip, iface_ip, lcl->is_ip4); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 135 | } |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 136 | ip_copy (&listener->c_lcl_ip, &lcl->ip, lcl->is_ip4); |
| 137 | listener->c_is_ip4 = lcl->is_ip4; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 138 | listener->c_proto = TRANSPORT_PROTO_TCP; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 139 | listener->c_s_index = session_index; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 140 | listener->c_fib_index = lcl->fib_index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 141 | listener->state = TCP_STATE_LISTEN; |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 142 | listener->cc_algo = tcp_cc_algo_get (tcp_cfg.cc_algo); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 143 | |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 144 | tcp_connection_timers_init (listener); |
| 145 | |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 146 | TCP_EVT (TCP_EVT_BIND, listener); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 147 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 148 | return listener->c_c_index; |
| 149 | } |
| 150 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 151 | static u32 |
Florin Coras | 0bce71e | 2022-02-10 11:57:06 -0800 | [diff] [blame] | 152 | tcp_session_bind (u32 session_index, transport_endpoint_cfg_t *tep) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 153 | { |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 154 | return tcp_connection_bind (session_index, tep); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | static void |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 158 | tcp_connection_unbind (u32 listener_index) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 159 | { |
| 160 | tcp_main_t *tm = vnet_get_tcp_main (); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 161 | tcp_connection_t *tc; |
| 162 | |
| 163 | tc = pool_elt_at_index (tm->listener_pool, listener_index); |
| 164 | |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 165 | TCP_EVT (TCP_EVT_UNBIND, tc); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 166 | |
| 167 | /* Poison the entry */ |
| 168 | if (CLIB_DEBUG > 0) |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 169 | clib_memset (tc, 0xFA, sizeof (*tc)); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 170 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 171 | pool_put_index (tm->listener_pool, listener_index); |
| 172 | } |
| 173 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 174 | static u32 |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 175 | tcp_session_unbind (u32 listener_index) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 176 | { |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 177 | tcp_connection_unbind (listener_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 178 | return 0; |
| 179 | } |
| 180 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 181 | static transport_connection_t * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 182 | tcp_session_get_listener (u32 listener_index) |
| 183 | { |
| 184 | tcp_main_t *tm = vnet_get_tcp_main (); |
| 185 | tcp_connection_t *tc; |
| 186 | tc = pool_elt_at_index (tm->listener_pool, listener_index); |
| 187 | return &tc->connection; |
| 188 | } |
| 189 | |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 190 | static tcp_connection_t * |
| 191 | tcp_half_open_connection_alloc (void) |
| 192 | { |
Florin Coras | 309f7aa | 2022-03-18 08:33:08 -0700 | [diff] [blame] | 193 | return tcp_connection_alloc (transport_cl_thread ()); |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 194 | } |
| 195 | |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 196 | /** |
| 197 | * Cleanup half-open connection |
| 198 | * |
| 199 | */ |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 200 | static void |
Florin Coras | d50ff7f | 2020-04-16 04:30:22 +0000 | [diff] [blame] | 201 | tcp_half_open_connection_free (tcp_connection_t * tc) |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 202 | { |
Florin Coras | 309f7aa | 2022-03-18 08:33:08 -0700 | [diff] [blame] | 203 | ASSERT (vlib_get_thread_index () == tc->c_thread_index || |
| 204 | vlib_thread_is_main_w_barrier ()); |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 205 | return tcp_connection_free (tc); |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Try to cleanup half-open connection |
| 210 | * |
| 211 | * If called from a thread that doesn't own tc, the call won't have any |
| 212 | * effect. |
| 213 | * |
| 214 | * @param tc - connection to be cleaned up |
| 215 | * @return non-zero if cleanup failed. |
| 216 | */ |
| 217 | int |
| 218 | tcp_half_open_connection_cleanup (tcp_connection_t * tc) |
| 219 | { |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 220 | tcp_worker_ctx_t *wrk; |
| 221 | |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 222 | /* Make sure this is the owning thread */ |
| 223 | if (tc->c_thread_index != vlib_get_thread_index ()) |
| 224 | return 1; |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 225 | |
Florin Coras | ea72764 | 2021-05-07 19:39:43 -0700 | [diff] [blame] | 226 | session_half_open_delete_notify (&tc->connection); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 227 | wrk = tcp_get_worker (tc->c_thread_index); |
| 228 | tcp_timer_reset (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN); |
Florin Coras | d50ff7f | 2020-04-16 04:30:22 +0000 | [diff] [blame] | 229 | tcp_half_open_connection_free (tc); |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 230 | return 0; |
| 231 | } |
| 232 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 233 | /** |
| 234 | * Cleans up connection state. |
| 235 | * |
| 236 | * No notifications. |
| 237 | */ |
| 238 | void |
| 239 | tcp_connection_cleanup (tcp_connection_t * tc) |
| 240 | { |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 241 | TCP_EVT (TCP_EVT_DELETE, tc); |
Florin Coras | 070fd4b | 2019-04-02 19:03:23 -0700 | [diff] [blame] | 242 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 243 | /* Cleanup local endpoint if this was an active connect */ |
Florin Coras | 43818c1 | 2020-02-09 23:09:26 +0000 | [diff] [blame] | 244 | if (!(tc->cfg_flags & TCP_CFG_F_NO_ENDPOINT)) |
Florin Coras | bf27ca8 | 2022-11-09 15:54:39 -0800 | [diff] [blame] | 245 | transport_release_local_endpoint (TRANSPORT_PROTO_TCP, &tc->c_lcl_ip, |
| 246 | tc->c_lcl_port); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 247 | |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 248 | /* Check if connection is not yet fully established */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 249 | if (tc->state == TCP_STATE_SYN_SENT) |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 250 | { |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 251 | /* Try to remove the half-open connection. If this is not the owning |
| 252 | * thread, tc won't be removed. Retransmit or establish timers will |
| 253 | * eventually expire and call again cleanup on the right thread. */ |
Florin Coras | c5347d9 | 2018-10-17 10:41:28 -0700 | [diff] [blame] | 254 | if (tcp_half_open_connection_cleanup (tc)) |
| 255 | tc->flags |= TCP_CONN_HALF_OPEN_DONE; |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 256 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 257 | else |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 258 | { |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 259 | /* Make sure all timers are cleared */ |
| 260 | tcp_connection_timers_reset (tc); |
| 261 | |
Florin Coras | 1c8ff63 | 2018-05-17 13:28:34 -0700 | [diff] [blame] | 262 | if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6)) |
| 263 | tcp_add_del_adjacency (tc, 0); |
| 264 | |
Florin Coras | d9a145f | 2019-06-07 09:35:20 -0700 | [diff] [blame] | 265 | tcp_cc_cleanup (tc); |
Florin Coras | b691f76 | 2019-02-22 09:07:20 -0800 | [diff] [blame] | 266 | vec_free (tc->snd_sacks); |
| 267 | vec_free (tc->snd_sacks_fl); |
Florin Coras | 558e3e0 | 2019-09-06 12:56:58 -0700 | [diff] [blame] | 268 | vec_free (tc->rcv_opts.sacks); |
| 269 | pool_free (tc->sack_sb.holes); |
Florin Coras | b691f76 | 2019-02-22 09:07:20 -0800 | [diff] [blame] | 270 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 271 | if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE) |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 272 | tcp_bt_cleanup (tc); |
| 273 | |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 274 | tcp_connection_free (tc); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 275 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Connection removal. |
| 280 | * |
| 281 | * This should be called only once connection enters CLOSED state. Note |
| 282 | * that it notifies the session of the removal event, so if the goal is to |
| 283 | * just remove the connection, call tcp_connection_cleanup instead. |
| 284 | */ |
| 285 | void |
| 286 | tcp_connection_del (tcp_connection_t * tc) |
| 287 | { |
Florin Coras | 5a2ec8f | 2018-12-27 11:53:11 -0800 | [diff] [blame] | 288 | session_transport_delete_notify (&tc->connection); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 289 | tcp_connection_cleanup (tc); |
| 290 | } |
| 291 | |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 292 | tcp_connection_t * |
Florin Coras | 8124cb7 | 2018-12-16 20:57:29 -0800 | [diff] [blame] | 293 | tcp_connection_alloc (u8 thread_index) |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 294 | { |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 295 | tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 296 | tcp_connection_t *tc; |
| 297 | |
Florin Coras | b018732 | 2022-03-15 16:27:43 -0700 | [diff] [blame] | 298 | pool_get_aligned_safe (wrk->connections, tc, CLIB_CACHE_LINE_BYTES); |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 299 | clib_memset (tc, 0, sizeof (*tc)); |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 300 | tc->c_c_index = tc - wrk->connections; |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 301 | tc->c_thread_index = thread_index; |
| 302 | return tc; |
| 303 | } |
| 304 | |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 305 | tcp_connection_t * |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 306 | tcp_connection_alloc_w_base (u8 thread_index, tcp_connection_t **base) |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 307 | { |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 308 | tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 309 | tcp_connection_t *tc; |
| 310 | |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 311 | /* Make sure connection is still valid if pool moves */ |
| 312 | if ((*base)->c_thread_index == thread_index) |
| 313 | { |
| 314 | u32 base_index = (*base)->c_c_index; |
Florin Coras | b018732 | 2022-03-15 16:27:43 -0700 | [diff] [blame] | 315 | pool_get_aligned_safe (wrk->connections, tc, CLIB_CACHE_LINE_BYTES); |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 316 | *base = tcp_connection_get (base_index, thread_index); |
| 317 | } |
| 318 | else |
| 319 | { |
Florin Coras | b018732 | 2022-03-15 16:27:43 -0700 | [diff] [blame] | 320 | pool_get_aligned_safe (wrk->connections, tc, CLIB_CACHE_LINE_BYTES); |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 321 | } |
| 322 | clib_memcpy_fast (tc, *base, sizeof (*tc)); |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 323 | tc->c_c_index = tc - wrk->connections; |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 324 | tc->c_thread_index = thread_index; |
| 325 | return tc; |
| 326 | } |
| 327 | |
Florin Coras | 8124cb7 | 2018-12-16 20:57:29 -0800 | [diff] [blame] | 328 | void |
| 329 | tcp_connection_free (tcp_connection_t * tc) |
| 330 | { |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 331 | tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); |
Florin Coras | 6416e62 | 2019-04-03 17:52:43 -0700 | [diff] [blame] | 332 | if (CLIB_DEBUG) |
| 333 | { |
Florin Coras | 6416e62 | 2019-04-03 17:52:43 -0700 | [diff] [blame] | 334 | clib_memset (tc, 0xFA, sizeof (*tc)); |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 335 | pool_put (wrk->connections, tc); |
Florin Coras | 6416e62 | 2019-04-03 17:52:43 -0700 | [diff] [blame] | 336 | return; |
| 337 | } |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 338 | pool_put (wrk->connections, tc); |
Florin Coras | 8124cb7 | 2018-12-16 20:57:29 -0800 | [diff] [blame] | 339 | } |
| 340 | |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 341 | void |
| 342 | tcp_program_cleanup (tcp_worker_ctx_t * wrk, tcp_connection_t * tc) |
| 343 | { |
| 344 | tcp_cleanup_req_t *req; |
| 345 | clib_time_type_t now; |
| 346 | |
Florin Coras | 8f10b90 | 2021-04-02 18:32:00 -0700 | [diff] [blame] | 347 | now = tcp_time_now_us (tc->c_thread_index); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 348 | clib_fifo_add2 (wrk->pending_cleanups, req); |
| 349 | req->connection_index = tc->c_c_index; |
| 350 | req->free_time = now + tcp_cfg.cleanup_time; |
| 351 | } |
| 352 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 353 | /** |
| 354 | * Begin connection closing procedure. |
| 355 | * |
| 356 | * If at the end the connection is not in CLOSED state, it is not removed. |
| 357 | * Instead, we rely on on TCP to advance through state machine to either |
| 358 | * 1) LAST_ACK (passive close) whereby when the last ACK is received |
| 359 | * tcp_connection_del is called. This notifies session of the delete and |
| 360 | * calls cleanup. |
| 361 | * 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers |
| 362 | * and cleanup is called. |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 363 | * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 364 | */ |
| 365 | void |
| 366 | tcp_connection_close (tcp_connection_t * tc) |
| 367 | { |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 368 | tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); |
| 369 | |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 370 | TCP_EVT (TCP_EVT_CLOSE, tc); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 371 | |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 372 | /* Send/Program FIN if needed and switch state */ |
| 373 | switch (tc->state) |
| 374 | { |
| 375 | case TCP_STATE_SYN_SENT: |
Florin Coras | 85a3ddd | 2018-12-24 16:54:34 -0800 | [diff] [blame] | 376 | /* Try to cleanup. If not on the right thread, mark as half-open done. |
| 377 | * Connection will be cleaned up when establish timer pops */ |
| 378 | tcp_connection_cleanup (tc); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 379 | break; |
| 380 | case TCP_STATE_SYN_RCVD: |
Florin Coras | c5347d9 | 2018-10-17 10:41:28 -0700 | [diff] [blame] | 381 | tcp_connection_timers_reset (tc); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 382 | tcp_send_fin (tc); |
Florin Coras | 3c514d5 | 2018-12-22 11:39:33 -0800 | [diff] [blame] | 383 | tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 384 | tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE, |
| 385 | tcp_cfg.finwait1_time); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 386 | break; |
| 387 | case TCP_STATE_ESTABLISHED: |
Florin Coras | f65074e | 2019-03-31 17:17:11 -0700 | [diff] [blame] | 388 | /* If closing with unread data, reset the connection */ |
| 389 | if (transport_max_rx_dequeue (&tc->connection)) |
| 390 | { |
| 391 | tcp_send_reset (tc); |
| 392 | tcp_connection_timers_reset (tc); |
| 393 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | a0904f0 | 2019-07-22 20:55:11 -0700 | [diff] [blame] | 394 | session_transport_closed_notify (&tc->connection); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 395 | tcp_program_cleanup (tcp_get_worker (tc->c_thread_index), tc); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 396 | tcp_worker_stats_inc (wrk, rst_unread, 1); |
Florin Coras | f65074e | 2019-03-31 17:17:11 -0700 | [diff] [blame] | 397 | break; |
| 398 | } |
Florin Coras | 31c9955 | 2019-03-01 13:00:58 -0800 | [diff] [blame] | 399 | if (!transport_max_tx_dequeue (&tc->connection)) |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 400 | tcp_send_fin (tc); |
| 401 | else |
| 402 | tc->flags |= TCP_CONN_FINPNDG; |
Florin Coras | 3c514d5 | 2018-12-22 11:39:33 -0800 | [diff] [blame] | 403 | tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1); |
Florin Coras | e96bf63 | 2018-12-18 22:44:27 -0800 | [diff] [blame] | 404 | /* Set a timer in case the peer stops responding. Otherwise the |
| 405 | * connection will be stuck here forever. */ |
Florin Coras | 85a3ddd | 2018-12-24 16:54:34 -0800 | [diff] [blame] | 406 | ASSERT (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 407 | tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE, |
| 408 | tcp_cfg.finwait1_time); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 409 | break; |
| 410 | case TCP_STATE_CLOSE_WAIT: |
Florin Coras | 31c9955 | 2019-03-01 13:00:58 -0800 | [diff] [blame] | 411 | if (!transport_max_tx_dequeue (&tc->connection)) |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 412 | { |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 413 | tcp_connection_timers_reset (tc); |
Florin Coras | d1e17a8 | 2024-02-16 18:36:32 -0800 | [diff] [blame] | 414 | tcp_send_fin (tc); |
Florin Coras | 3c514d5 | 2018-12-22 11:39:33 -0800 | [diff] [blame] | 415 | tcp_connection_set_state (tc, TCP_STATE_LAST_ACK); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 416 | tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE, |
| 417 | tcp_cfg.lastack_time); |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 418 | } |
| 419 | else |
| 420 | tc->flags |= TCP_CONN_FINPNDG; |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 421 | break; |
Florin Coras | c87c91d | 2017-08-16 19:55:49 -0700 | [diff] [blame] | 422 | case TCP_STATE_FIN_WAIT_1: |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 423 | tcp_timer_update (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE, |
| 424 | tcp_cfg.finwait1_time); |
Florin Coras | c87c91d | 2017-08-16 19:55:49 -0700 | [diff] [blame] | 425 | break; |
Florin Coras | 4af830c | 2018-12-04 09:21:36 -0800 | [diff] [blame] | 426 | case TCP_STATE_CLOSED: |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 427 | /* Cleanup should've been programmed already */ |
Florin Coras | 4af830c | 2018-12-04 09:21:36 -0800 | [diff] [blame] | 428 | break; |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 429 | default: |
Florin Coras | a096f2d | 2017-09-28 23:49:42 -0400 | [diff] [blame] | 430 | TCP_DBG ("state: %u", tc->state); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 431 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 432 | } |
| 433 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 434 | static void |
liuyacan | 534468e | 2021-05-09 03:50:40 +0000 | [diff] [blame] | 435 | tcp_session_half_close (u32 conn_index, u32 thread_index) |
| 436 | { |
| 437 | tcp_worker_ctx_t *wrk; |
| 438 | tcp_connection_t *tc; |
| 439 | |
| 440 | tc = tcp_connection_get (conn_index, thread_index); |
| 441 | wrk = tcp_get_worker (tc->c_thread_index); |
| 442 | |
| 443 | /* If the connection is not in ESTABLISHED state, ignore it */ |
| 444 | if (tc->state != TCP_STATE_ESTABLISHED) |
| 445 | return; |
| 446 | if (!transport_max_tx_dequeue (&tc->connection)) |
| 447 | tcp_send_fin (tc); |
| 448 | else |
| 449 | tc->flags |= TCP_CONN_FINPNDG; |
| 450 | tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1); |
| 451 | /* Set a timer in case the peer stops responding. Otherwise the |
| 452 | * connection will be stuck here forever. */ |
| 453 | ASSERT (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID); |
| 454 | tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE, |
| 455 | tcp_cfg.finwait1_time); |
| 456 | } |
| 457 | |
| 458 | static void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 459 | tcp_session_close (u32 conn_index, u32 thread_index) |
| 460 | { |
| 461 | tcp_connection_t *tc; |
| 462 | tc = tcp_connection_get (conn_index, thread_index); |
| 463 | tcp_connection_close (tc); |
| 464 | } |
| 465 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 466 | static void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 467 | tcp_session_cleanup (u32 conn_index, u32 thread_index) |
| 468 | { |
| 469 | tcp_connection_t *tc; |
| 470 | tc = tcp_connection_get (conn_index, thread_index); |
Florin Coras | 54c93cf | 2019-09-24 12:45:14 -0700 | [diff] [blame] | 471 | if (!tc) |
| 472 | return; |
Florin Coras | 85a3ddd | 2018-12-24 16:54:34 -0800 | [diff] [blame] | 473 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 474 | tcp_connection_cleanup (tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 475 | } |
| 476 | |
Florin Coras | dfb3b87 | 2019-08-16 17:48:44 -0700 | [diff] [blame] | 477 | static void |
Florin Coras | d50ff7f | 2020-04-16 04:30:22 +0000 | [diff] [blame] | 478 | tcp_session_cleanup_ho (u32 conn_index) |
| 479 | { |
| 480 | tcp_worker_ctx_t *wrk; |
| 481 | tcp_connection_t *tc; |
| 482 | |
| 483 | tc = tcp_half_open_connection_get (conn_index); |
| 484 | wrk = tcp_get_worker (tc->c_thread_index); |
| 485 | tcp_timer_reset (&wrk->timer_wheel, tc, TCP_TIMER_RETRANSMIT_SYN); |
| 486 | tcp_half_open_connection_free (tc); |
| 487 | } |
| 488 | |
| 489 | static void |
Florin Coras | dfb3b87 | 2019-08-16 17:48:44 -0700 | [diff] [blame] | 490 | tcp_session_reset (u32 conn_index, u32 thread_index) |
| 491 | { |
| 492 | tcp_connection_t *tc; |
| 493 | tc = tcp_connection_get (conn_index, thread_index); |
Florin Coras | c9fb987 | 2023-03-19 22:03:57 -0700 | [diff] [blame] | 494 | |
| 495 | /* For half-opens just cleanup */ |
| 496 | if (tc->state == TCP_STATE_SYN_SENT) |
| 497 | { |
| 498 | tcp_connection_cleanup (tc); |
| 499 | return; |
| 500 | } |
| 501 | |
Florin Coras | dfb3b87 | 2019-08-16 17:48:44 -0700 | [diff] [blame] | 502 | tcp_send_reset (tc); |
| 503 | tcp_connection_timers_reset (tc); |
Florin Coras | fd4c3fe | 2019-11-07 12:33:12 -0800 | [diff] [blame] | 504 | tcp_cong_recovery_off (tc); |
Florin Coras | dfb3b87 | 2019-08-16 17:48:44 -0700 | [diff] [blame] | 505 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 506 | session_transport_closed_notify (&tc->connection); |
| 507 | tcp_program_cleanup (tcp_get_worker (thread_index), tc); |
Florin Coras | dfb3b87 | 2019-08-16 17:48:44 -0700 | [diff] [blame] | 508 | } |
| 509 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 510 | /** |
| 511 | * Initialize all connection timers as invalid |
| 512 | */ |
| 513 | void |
| 514 | tcp_connection_timers_init (tcp_connection_t * tc) |
| 515 | { |
| 516 | int i; |
| 517 | |
| 518 | /* Set all to invalid */ |
| 519 | for (i = 0; i < TCP_N_TIMERS; i++) |
| 520 | { |
| 521 | tc->timers[i] = TCP_TIMER_HANDLE_INVALID; |
| 522 | } |
| 523 | |
| 524 | tc->rto = TCP_RTO_INIT; |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * Stop all connection timers |
| 529 | */ |
| 530 | void |
| 531 | tcp_connection_timers_reset (tcp_connection_t * tc) |
| 532 | { |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 533 | tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 534 | int i; |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 535 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 536 | for (i = 0; i < TCP_N_TIMERS; i++) |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 537 | tcp_timer_reset (&wrk->timer_wheel, tc, i); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 538 | } |
| 539 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 540 | #if 0 |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 541 | typedef struct ip4_tcp_hdr |
| 542 | { |
| 543 | ip4_header_t ip; |
| 544 | tcp_header_t tcp; |
| 545 | } ip4_tcp_hdr_t; |
| 546 | |
| 547 | typedef struct ip6_tcp_hdr |
| 548 | { |
| 549 | ip6_header_t ip; |
| 550 | tcp_header_t tcp; |
| 551 | } ip6_tcp_hdr_t; |
| 552 | |
| 553 | static void |
| 554 | tcp_connection_select_lb_bucket (tcp_connection_t * tc, const dpo_id_t * dpo, |
| 555 | dpo_id_t * result) |
| 556 | { |
| 557 | const dpo_id_t *choice; |
| 558 | load_balance_t *lb; |
| 559 | int hash; |
| 560 | |
| 561 | lb = load_balance_get (dpo->dpoi_index); |
| 562 | if (tc->c_is_ip4) |
| 563 | { |
| 564 | ip4_tcp_hdr_t hdr; |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 565 | clib_memset (&hdr, 0, sizeof (hdr)); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 566 | hdr.ip.protocol = IP_PROTOCOL_TCP; |
| 567 | hdr.ip.address_pair.src.as_u32 = tc->c_lcl_ip.ip4.as_u32; |
| 568 | hdr.ip.address_pair.dst.as_u32 = tc->c_rmt_ip.ip4.as_u32; |
| 569 | hdr.tcp.src_port = tc->c_lcl_port; |
| 570 | hdr.tcp.dst_port = tc->c_rmt_port; |
| 571 | hash = ip4_compute_flow_hash (&hdr.ip, lb->lb_hash_config); |
| 572 | } |
| 573 | else |
| 574 | { |
| 575 | ip6_tcp_hdr_t hdr; |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 576 | clib_memset (&hdr, 0, sizeof (hdr)); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 577 | hdr.ip.protocol = IP_PROTOCOL_TCP; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 578 | clib_memcpy_fast (&hdr.ip.src_address, &tc->c_lcl_ip.ip6, |
| 579 | sizeof (ip6_address_t)); |
| 580 | clib_memcpy_fast (&hdr.ip.dst_address, &tc->c_rmt_ip.ip6, |
| 581 | sizeof (ip6_address_t)); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 582 | hdr.tcp.src_port = tc->c_lcl_port; |
| 583 | hdr.tcp.dst_port = tc->c_rmt_port; |
| 584 | hash = ip6_compute_flow_hash (&hdr.ip, lb->lb_hash_config); |
| 585 | } |
| 586 | choice = load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1); |
| 587 | dpo_copy (result, choice); |
| 588 | } |
| 589 | |
| 590 | fib_node_index_t |
| 591 | tcp_lookup_rmt_in_fib (tcp_connection_t * tc) |
| 592 | { |
| 593 | fib_prefix_t prefix; |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 594 | u32 fib_index; |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 595 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 596 | clib_memcpy_fast (&prefix.fp_addr, &tc->c_rmt_ip, sizeof (prefix.fp_addr)); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 597 | prefix.fp_proto = tc->c_is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6; |
| 598 | prefix.fp_len = tc->c_is_ip4 ? 32 : 128; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 599 | fib_index = fib_table_find (prefix.fp_proto, tc->c_fib_index); |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 600 | return fib_table_lookup (fib_index, &prefix); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 601 | } |
| 602 | |
| 603 | static int |
| 604 | tcp_connection_stack_on_fib_entry (tcp_connection_t * tc) |
| 605 | { |
| 606 | dpo_id_t choice = DPO_INVALID; |
| 607 | u32 output_node_index; |
| 608 | fib_entry_t *fe; |
| 609 | |
| 610 | fe = fib_entry_get (tc->c_rmt_fei); |
| 611 | if (fe->fe_lb.dpoi_type != DPO_LOAD_BALANCE) |
| 612 | return -1; |
| 613 | |
| 614 | tcp_connection_select_lb_bucket (tc, &fe->fe_lb, &choice); |
| 615 | |
| 616 | output_node_index = |
| 617 | tc->c_is_ip4 ? tcp4_output_node.index : tcp6_output_node.index; |
| 618 | dpo_stack_from_node (output_node_index, &tc->c_rmt_dpo, &choice); |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | /** Stack tcp connection on peer's fib entry. |
| 623 | * |
| 624 | * This ultimately populates the dpo the connection will use to send packets. |
| 625 | */ |
| 626 | static void |
| 627 | tcp_connection_fib_attach (tcp_connection_t * tc) |
| 628 | { |
| 629 | tc->c_rmt_fei = tcp_lookup_rmt_in_fib (tc); |
| 630 | |
| 631 | ASSERT (tc->c_rmt_fei != FIB_NODE_INDEX_INVALID); |
| 632 | |
| 633 | tcp_connection_stack_on_fib_entry (tc); |
| 634 | } |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 635 | #endif /* 0 */ |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 636 | |
Florin Coras | 18e0d4f | 2019-01-02 12:22:02 -0800 | [diff] [blame] | 637 | /** |
| 638 | * Generate random iss as per rfc6528 |
| 639 | */ |
| 640 | static u32 |
| 641 | tcp_generate_random_iss (tcp_connection_t * tc) |
| 642 | { |
| 643 | tcp_main_t *tm = &tcp_main; |
| 644 | u64 tmp; |
| 645 | |
| 646 | if (tc->c_is_ip4) |
| 647 | tmp = (u64) tc->c_lcl_ip.ip4.as_u32 << 32 | (u64) tc->c_rmt_ip.ip4.as_u32; |
| 648 | else |
| 649 | tmp = tc->c_lcl_ip.ip6.as_u64[0] ^ tc->c_lcl_ip.ip6.as_u64[1] |
| 650 | ^ tc->c_rmt_ip.ip6.as_u64[0] ^ tc->c_rmt_ip.ip6.as_u64[1]; |
| 651 | |
| 652 | tmp ^= tm->iss_seed.first | ((u64) tc->c_lcl_port << 16 | tc->c_rmt_port); |
| 653 | tmp ^= tm->iss_seed.second; |
| 654 | tmp = clib_xxhash (tmp) + clib_cpu_time_now (); |
| 655 | return ((tmp >> 32) ^ (tmp & 0xffffffff)); |
| 656 | } |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 657 | |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 658 | /** |
Florin Coras | cedcf60 | 2019-08-27 12:15:43 -0700 | [diff] [blame] | 659 | * Initialize max segment size we're able to process. |
| 660 | * |
| 661 | * The value is constrained by the output interface's MTU and by the size |
| 662 | * of the IP and TCP headers (see RFC6691). It is also what we advertise |
| 663 | * to our peer. |
| 664 | */ |
| 665 | static void |
| 666 | tcp_init_rcv_mss (tcp_connection_t * tc) |
| 667 | { |
| 668 | u8 ip_hdr_len; |
| 669 | |
Florin Coras | ff19e3b | 2020-02-10 17:44:13 +0000 | [diff] [blame] | 670 | /* Already provided at connection init time */ |
| 671 | if (tc->mss) |
| 672 | return; |
| 673 | |
Florin Coras | cedcf60 | 2019-08-27 12:15:43 -0700 | [diff] [blame] | 674 | ip_hdr_len = tc->c_is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t); |
| 675 | tc->mss = tcp_cfg.default_mtu - sizeof (tcp_header_t) - ip_hdr_len; |
| 676 | } |
| 677 | |
| 678 | static void |
| 679 | tcp_init_mss (tcp_connection_t * tc) |
| 680 | { |
| 681 | u16 default_min_mss = 536; |
| 682 | |
| 683 | tcp_init_rcv_mss (tc); |
| 684 | |
| 685 | /* TODO consider PMTU discovery */ |
| 686 | tc->snd_mss = clib_min (tc->rcv_opts.mss, tc->mss); |
| 687 | |
| 688 | if (tc->snd_mss < 45) |
| 689 | { |
| 690 | /* Assume that at least the min default mss works */ |
| 691 | tc->snd_mss = default_min_mss; |
| 692 | tc->rcv_opts.mss = default_min_mss; |
| 693 | } |
| 694 | |
| 695 | /* We should have enough space for 40 bytes of options */ |
| 696 | ASSERT (tc->snd_mss > 45); |
| 697 | |
Florin Coras | 7a588fc | 2021-03-05 13:30:18 -0800 | [diff] [blame] | 698 | /* If we use timestamp option, account for it and make sure |
| 699 | * the options are 4-byte aligned */ |
Florin Coras | cedcf60 | 2019-08-27 12:15:43 -0700 | [diff] [blame] | 700 | if (tcp_opts_tstamp (&tc->rcv_opts)) |
Florin Coras | 7a588fc | 2021-03-05 13:30:18 -0800 | [diff] [blame] | 701 | tc->snd_mss -= TCP_OPTION_LEN_TIMESTAMP + 2 /* alignment */; |
Florin Coras | cedcf60 | 2019-08-27 12:15:43 -0700 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | /** |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 705 | * Initialize connection send variables. |
| 706 | */ |
| 707 | void |
| 708 | tcp_init_snd_vars (tcp_connection_t * tc) |
| 709 | { |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 710 | /* |
| 711 | * We use the time to randomize iss and for setting up the initial |
| 712 | * timestamp. Make sure it's updated otherwise syn and ack in the |
| 713 | * handshake may make it look as if time has flown in the opposite |
| 714 | * direction for us. |
| 715 | */ |
Florin Coras | 8f10b90 | 2021-04-02 18:32:00 -0700 | [diff] [blame] | 716 | tcp_update_time_now (tcp_get_worker (vlib_get_thread_index ())); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 717 | |
Florin Coras | cedcf60 | 2019-08-27 12:15:43 -0700 | [diff] [blame] | 718 | tcp_init_rcv_mss (tc); |
Michal Kalderon | 3effadc | 2021-08-08 04:30:39 -0700 | [diff] [blame] | 719 | /* |
| 720 | * In special case of early-kill of timewait socket, the iss will already |
| 721 | * be initialized to ensure it is greater than the last incarnation of the |
| 722 | * connection. see syn_during_timewait() for more details. |
| 723 | */ |
| 724 | if (!tc->iss) |
| 725 | tc->iss = tcp_generate_random_iss (tc); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 726 | tc->snd_una = tc->iss; |
| 727 | tc->snd_nxt = tc->iss + 1; |
Florin Coras | eedc74b | 2020-07-31 12:32:40 -0700 | [diff] [blame] | 728 | tc->srtt = 0.1 * THZ; /* 100 ms */ |
Florin Coras | f4ce6ba | 2019-11-20 18:34:58 -0800 | [diff] [blame] | 729 | |
| 730 | if (!tcp_cfg.csum_offload) |
| 731 | tc->cfg_flags |= TCP_CFG_F_NO_CSUM_OFFLOAD; |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 732 | } |
| 733 | |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 734 | void |
| 735 | tcp_enable_pacing (tcp_connection_t * tc) |
| 736 | { |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 737 | u32 byte_rate; |
| 738 | byte_rate = tc->cwnd / (tc->srtt * TCP_TICK); |
| 739 | transport_connection_tx_pacer_init (&tc->connection, byte_rate, tc->cwnd); |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 740 | tc->mrtt_us = (u32) ~ 0; |
| 741 | } |
| 742 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 743 | /** Initialize tcp connection variables |
| 744 | * |
| 745 | * Should be called after having received a msg from the peer, i.e., a SYN or |
| 746 | * a SYNACK, such that connection options have already been exchanged. */ |
| 747 | void |
| 748 | tcp_connection_init_vars (tcp_connection_t * tc) |
| 749 | { |
| 750 | tcp_connection_timers_init (tc); |
Florin Coras | c834341 | 2017-05-04 14:25:50 -0700 | [diff] [blame] | 751 | tcp_init_mss (tc); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 752 | scoreboard_init (&tc->sack_sb); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 753 | if (tc->state == TCP_STATE_SYN_RCVD) |
| 754 | tcp_init_snd_vars (tc); |
| 755 | |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 756 | tcp_cc_init (tc); |
| 757 | |
Florin Coras | 1c8ff63 | 2018-05-17 13:28:34 -0700 | [diff] [blame] | 758 | if (!tc->c_is_ip4 && ip6_address_is_link_local_unicast (&tc->c_rmt_ip6)) |
| 759 | tcp_add_del_adjacency (tc, 1); |
| 760 | |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 761 | /* tcp_connection_fib_attach (tc); */ |
| 762 | |
| 763 | if (transport_connection_is_tx_paced (&tc->connection) |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 764 | || tcp_cfg.enable_tx_pacing) |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 765 | tcp_enable_pacing (tc); |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 766 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 767 | if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE) |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 768 | tcp_bt_init (tc); |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 769 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 770 | if (!tcp_cfg.allow_tso) |
| 771 | tc->cfg_flags |= TCP_CFG_F_NO_TSO; |
| 772 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 773 | tc->start_ts = tcp_time_now_us (tc->c_thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 774 | } |
| 775 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 776 | static int |
Florin Coras | 3d6156f | 2023-01-30 11:18:36 -0800 | [diff] [blame] | 777 | tcp_alloc_custom_local_endpoint (ip46_address_t *lcl_addr, u16 *lcl_port, |
| 778 | transport_endpoint_cfg_t *rmt) |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 779 | { |
Florin Coras | 3d6156f | 2023-01-30 11:18:36 -0800 | [diff] [blame] | 780 | tcp_main_t *tm = vnet_get_tcp_main (); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 781 | int index, port; |
Florin Coras | 3d6156f | 2023-01-30 11:18:36 -0800 | [diff] [blame] | 782 | |
| 783 | if (rmt->is_ip4) |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 784 | { |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 785 | index = tm->last_v4_addr_rotor++; |
| 786 | if (tm->last_v4_addr_rotor >= vec_len (tcp_cfg.ip4_src_addrs)) |
| 787 | tm->last_v4_addr_rotor = 0; |
Mercury | 65409fb | 2021-12-23 19:15:02 +0800 | [diff] [blame] | 788 | clib_memset (lcl_addr, 0, sizeof (*lcl_addr)); |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 789 | lcl_addr->ip4.as_u32 = tcp_cfg.ip4_src_addrs[index].as_u32; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 790 | } |
| 791 | else |
| 792 | { |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 793 | index = tm->last_v6_addr_rotor++; |
| 794 | if (tm->last_v6_addr_rotor >= vec_len (tcp_cfg.ip6_src_addrs)) |
| 795 | tm->last_v6_addr_rotor = 0; |
| 796 | clib_memcpy_fast (&lcl_addr->ip6, &tcp_cfg.ip6_src_addrs[index], |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 797 | sizeof (ip6_address_t)); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 798 | } |
Florin Coras | 3d6156f | 2023-01-30 11:18:36 -0800 | [diff] [blame] | 799 | port = transport_alloc_local_port (TRANSPORT_PROTO_TCP, lcl_addr, rmt); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 800 | if (port < 1) |
Florin Coras | 00e01d3 | 2019-10-21 16:07:46 -0700 | [diff] [blame] | 801 | return SESSION_E_NOPORT; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 802 | *lcl_port = port; |
| 803 | return 0; |
| 804 | } |
| 805 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 806 | static int |
Florin Coras | 5665ced | 2018-10-25 18:03:45 -0700 | [diff] [blame] | 807 | tcp_session_open (transport_endpoint_cfg_t * rmt) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 808 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 809 | tcp_connection_t *tc; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 810 | ip46_address_t lcl_addr; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 811 | u16 lcl_port; |
| 812 | int rv; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 813 | |
| 814 | /* |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 815 | * Allocate local endpoint |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 816 | */ |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 817 | if ((rmt->is_ip4 && vec_len (tcp_cfg.ip4_src_addrs)) |
| 818 | || (!rmt->is_ip4 && vec_len (tcp_cfg.ip6_src_addrs))) |
Florin Coras | 3d6156f | 2023-01-30 11:18:36 -0800 | [diff] [blame] | 819 | rv = tcp_alloc_custom_local_endpoint (&lcl_addr, &lcl_port, rmt); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 820 | else |
Florin Coras | e541d6f | 2023-03-14 09:59:02 -0700 | [diff] [blame] | 821 | rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_TCP, rmt, &lcl_addr, |
| 822 | &lcl_port); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 823 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 824 | if (rv) |
Florin Coras | 3d6156f | 2023-01-30 11:18:36 -0800 | [diff] [blame] | 825 | return rv; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 826 | |
| 827 | /* |
| 828 | * Create connection and send SYN |
| 829 | */ |
Florin Coras | 57b2e4a | 2021-07-06 08:25:36 -0700 | [diff] [blame] | 830 | tc = tcp_half_open_connection_alloc (); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 831 | ip_copy (&tc->c_rmt_ip, &rmt->ip, rmt->is_ip4); |
| 832 | ip_copy (&tc->c_lcl_ip, &lcl_addr, rmt->is_ip4); |
Florin Coras | 0e49568 | 2017-09-19 22:27:18 -0700 | [diff] [blame] | 833 | tc->c_rmt_port = rmt->port; |
Florin Coras | 2365341 | 2024-03-09 15:51:50 -0800 | [diff] [blame] | 834 | tc->c_lcl_port = lcl_port; |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 835 | tc->c_is_ip4 = rmt->is_ip4; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 836 | tc->c_proto = TRANSPORT_PROTO_TCP; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 837 | tc->c_fib_index = rmt->fib_index; |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 838 | tc->cc_algo = tcp_cc_algo_get (tcp_cfg.cc_algo); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 839 | /* The other connection vars will be initialized after SYN ACK */ |
| 840 | tcp_connection_timers_init (tc); |
Florin Coras | ff19e3b | 2020-02-10 17:44:13 +0000 | [diff] [blame] | 841 | tc->mss = rmt->mss; |
Florin Coras | e2f3aa1 | 2021-10-27 10:53:41 -0700 | [diff] [blame] | 842 | if (rmt->peer.sw_if_index != ENDPOINT_INVALID_INDEX) |
| 843 | tc->sw_if_index = rmt->peer.sw_if_index; |
Florin Coras | 48057bd | 2021-07-06 21:07:50 -0700 | [diff] [blame] | 844 | tc->next_node_index = rmt->next_node_index; |
| 845 | tc->next_node_opaque = rmt->next_node_opaque; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 846 | |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 847 | TCP_EVT (TCP_EVT_OPEN, tc); |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 848 | tc->state = TCP_STATE_SYN_SENT; |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 849 | tcp_init_snd_vars (tc); |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 850 | tcp_send_syn (tc); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 851 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 852 | return tc->c_c_index; |
| 853 | } |
| 854 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 855 | static u8 * |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 856 | format_tcp_session (u8 * s, va_list * args) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 857 | { |
| 858 | u32 tci = va_arg (*args, u32); |
| 859 | u32 thread_index = va_arg (*args, u32); |
Florin Coras | bb292f4 | 2017-05-19 09:49:19 -0700 | [diff] [blame] | 860 | u32 verbose = va_arg (*args, u32); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 861 | tcp_connection_t *tc; |
| 862 | |
| 863 | tc = tcp_connection_get (tci, thread_index); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 864 | if (tc) |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 865 | s = format (s, "%U", format_tcp_connection, tc, verbose); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 866 | else |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 867 | s = format (s, "empty\n"); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 868 | return s; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 869 | } |
| 870 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 871 | static u8 * |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 872 | format_tcp_listener_session (u8 * s, va_list * args) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 873 | { |
| 874 | u32 tci = va_arg (*args, u32); |
Aloys Augustin | a0abbff | 2019-07-12 12:16:16 +0200 | [diff] [blame] | 875 | u32 __clib_unused thread_index = va_arg (*args, u32); |
Florin Coras | 3389dd2 | 2019-02-01 18:00:05 -0800 | [diff] [blame] | 876 | u32 verbose = va_arg (*args, u32); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 877 | tcp_connection_t *tc = tcp_listener_get (tci); |
Florin Coras | 7bf6ed6 | 2020-09-23 12:02:08 -0700 | [diff] [blame] | 878 | s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_tcp_connection_id, tc); |
Florin Coras | 3389dd2 | 2019-02-01 18:00:05 -0800 | [diff] [blame] | 879 | if (verbose) |
Florin Coras | 7bf6ed6 | 2020-09-23 12:02:08 -0700 | [diff] [blame] | 880 | s = format (s, "%-" SESSION_CLI_STATE_LEN "U", format_tcp_state, |
| 881 | tc->state); |
Aritra Basu | e30f712 | 2024-07-26 09:36:55 -0700 | [diff] [blame] | 882 | if (verbose == 2) |
| 883 | s = format (s, "\n%U", format_tcp_listener_connection, tc); |
Florin Coras | 3389dd2 | 2019-02-01 18:00:05 -0800 | [diff] [blame] | 884 | return s; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 885 | } |
| 886 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 887 | static u8 * |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 888 | format_tcp_half_open_session (u8 * s, va_list * args) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 889 | { |
| 890 | u32 tci = va_arg (*args, u32); |
Aloys Augustin | a0abbff | 2019-07-12 12:16:16 +0200 | [diff] [blame] | 891 | u32 __clib_unused thread_index = va_arg (*args, u32); |
Florin Coras | ea72764 | 2021-05-07 19:39:43 -0700 | [diff] [blame] | 892 | u32 verbose = va_arg (*args, u32); |
| 893 | tcp_connection_t *tc; |
| 894 | u8 *state = 0; |
| 895 | |
| 896 | tc = tcp_half_open_connection_get (tci); |
| 897 | if (tc->flags & TCP_CONN_HALF_OPEN_DONE) |
| 898 | state = format (state, "%s", "CLOSED"); |
| 899 | else |
| 900 | state = format (state, "%U", format_tcp_state, tc->state); |
| 901 | s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_tcp_connection_id, tc); |
| 902 | if (verbose) |
| 903 | s = format (s, "%-" SESSION_CLI_STATE_LEN "v", state); |
| 904 | vec_free (state); |
| 905 | return s; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 906 | } |
| 907 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 908 | static transport_connection_t * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 909 | tcp_session_get_transport (u32 conn_index, u32 thread_index) |
| 910 | { |
| 911 | tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index); |
Florin Coras | 5bb23ec | 2019-08-31 09:45:13 -0700 | [diff] [blame] | 912 | if (PREDICT_FALSE (!tc)) |
| 913 | return 0; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 914 | return &tc->connection; |
| 915 | } |
| 916 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 917 | static transport_connection_t * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 918 | tcp_half_open_session_get_transport (u32 conn_index) |
| 919 | { |
| 920 | tcp_connection_t *tc = tcp_half_open_connection_get (conn_index); |
| 921 | return &tc->connection; |
| 922 | } |
| 923 | |
Florin Coras | 04ae827 | 2021-04-12 19:55:37 -0700 | [diff] [blame] | 924 | static int |
| 925 | tcp_set_attribute (tcp_connection_t *tc, transport_endpt_attr_t *attr) |
| 926 | { |
| 927 | int rv = 0; |
| 928 | |
| 929 | switch (attr->type) |
| 930 | { |
| 931 | case TRANSPORT_ENDPT_ATTR_NEXT_OUTPUT_NODE: |
| 932 | tc->next_node_index = attr->next_output_node & 0xffffffff; |
| 933 | tc->next_node_opaque = attr->next_output_node >> 32; |
| 934 | break; |
| 935 | case TRANSPORT_ENDPT_ATTR_MSS: |
| 936 | tc->mss = attr->mss; |
| 937 | tc->snd_mss = clib_min (tc->snd_mss, tc->mss); |
| 938 | break; |
| 939 | case TRANSPORT_ENDPT_ATTR_FLAGS: |
| 940 | if (attr->flags & TRANSPORT_ENDPT_ATTR_F_CSUM_OFFLOAD) |
| 941 | tc->cfg_flags |= TCP_CFG_F_NO_CSUM_OFFLOAD; |
| 942 | else |
| 943 | tc->cfg_flags &= ~TCP_CFG_F_NO_CSUM_OFFLOAD; |
| 944 | if (attr->flags & TRANSPORT_ENDPT_ATTR_F_GSO) |
| 945 | { |
| 946 | if (!(tc->cfg_flags & TCP_CFG_F_TSO)) |
| 947 | tcp_check_gso (tc); |
| 948 | tc->cfg_flags &= ~TCP_CFG_F_NO_TSO; |
| 949 | } |
| 950 | else |
| 951 | { |
| 952 | tc->cfg_flags |= TCP_CFG_F_NO_TSO; |
| 953 | tc->cfg_flags &= ~TCP_CFG_F_TSO; |
| 954 | } |
Florin Coras | 7fdf8b2 | 2021-04-15 08:50:00 -0700 | [diff] [blame] | 955 | if (attr->flags & TRANSPORT_ENDPT_ATTR_F_RATE_SAMPLING) |
| 956 | { |
| 957 | if (!(tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE)) |
| 958 | tcp_bt_init (tc); |
| 959 | tc->cfg_flags |= TCP_CFG_F_RATE_SAMPLE; |
| 960 | } |
| 961 | else |
| 962 | { |
| 963 | if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE) |
| 964 | tcp_bt_cleanup (tc); |
| 965 | tc->cfg_flags &= ~TCP_CFG_F_RATE_SAMPLE; |
| 966 | } |
Florin Coras | 04ae827 | 2021-04-12 19:55:37 -0700 | [diff] [blame] | 967 | break; |
| 968 | case TRANSPORT_ENDPT_ATTR_CC_ALGO: |
| 969 | if (tc->cc_algo == tcp_cc_algo_get (attr->cc_algo)) |
| 970 | break; |
| 971 | tcp_cc_cleanup (tc); |
| 972 | tc->cc_algo = tcp_cc_algo_get (attr->cc_algo); |
| 973 | tcp_cc_init (tc); |
| 974 | break; |
| 975 | default: |
| 976 | rv = -1; |
| 977 | break; |
| 978 | } |
| 979 | |
| 980 | return rv; |
| 981 | } |
| 982 | |
| 983 | static int |
| 984 | tcp_get_attribute (tcp_connection_t *tc, transport_endpt_attr_t *attr) |
| 985 | { |
| 986 | int rv = 0; |
| 987 | u64 non; |
| 988 | |
| 989 | switch (attr->type) |
| 990 | { |
| 991 | case TRANSPORT_ENDPT_ATTR_NEXT_OUTPUT_NODE: |
| 992 | non = (u64) tc->next_node_opaque << 32 | tc->next_node_index; |
| 993 | attr->next_output_node = non; |
| 994 | break; |
| 995 | case TRANSPORT_ENDPT_ATTR_MSS: |
| 996 | attr->mss = tc->snd_mss; |
| 997 | break; |
| 998 | case TRANSPORT_ENDPT_ATTR_FLAGS: |
| 999 | attr->flags = 0; |
| 1000 | if (!(tc->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD)) |
| 1001 | attr->flags |= TRANSPORT_ENDPT_ATTR_F_CSUM_OFFLOAD; |
| 1002 | if (tc->cfg_flags & TCP_CFG_F_TSO) |
| 1003 | attr->flags |= TRANSPORT_ENDPT_ATTR_F_GSO; |
Florin Coras | 7fdf8b2 | 2021-04-15 08:50:00 -0700 | [diff] [blame] | 1004 | if (tc->cfg_flags & TCP_CFG_F_RATE_SAMPLE) |
| 1005 | attr->flags |= TRANSPORT_ENDPT_ATTR_F_RATE_SAMPLING; |
Florin Coras | 04ae827 | 2021-04-12 19:55:37 -0700 | [diff] [blame] | 1006 | break; |
| 1007 | case TRANSPORT_ENDPT_ATTR_CC_ALGO: |
| 1008 | attr->cc_algo = tc->cc_algo - tcp_main.cc_algos; |
| 1009 | break; |
| 1010 | default: |
| 1011 | rv = -1; |
| 1012 | break; |
| 1013 | } |
| 1014 | |
| 1015 | return rv; |
| 1016 | } |
| 1017 | |
| 1018 | static int |
| 1019 | tcp_session_attribute (u32 conn_index, u32 thread_index, u8 is_get, |
| 1020 | transport_endpt_attr_t *attr) |
| 1021 | { |
| 1022 | tcp_connection_t *tc = tcp_connection_get (conn_index, thread_index); |
| 1023 | |
| 1024 | if (PREDICT_FALSE (!tc)) |
| 1025 | return -1; |
| 1026 | |
| 1027 | if (is_get) |
| 1028 | return tcp_get_attribute (tc, attr); |
| 1029 | else |
| 1030 | return tcp_set_attribute (tc, attr); |
| 1031 | } |
| 1032 | |
Simon Zhang | 1146ff4 | 2019-09-02 22:54:00 +0800 | [diff] [blame] | 1033 | static u16 |
| 1034 | tcp_session_cal_goal_size (tcp_connection_t * tc) |
| 1035 | { |
| 1036 | u16 goal_size = tc->snd_mss; |
| 1037 | |
Simon Zhang | 23c3d34 | 2020-09-15 23:40:28 +0800 | [diff] [blame] | 1038 | goal_size = tcp_cfg.max_gso_size - tc->snd_mss % tcp_cfg.max_gso_size; |
Simon Zhang | 1146ff4 | 2019-09-02 22:54:00 +0800 | [diff] [blame] | 1039 | goal_size = clib_min (goal_size, tc->snd_wnd / 2); |
| 1040 | |
Simon Zhang | 8a047ed | 2019-09-24 21:16:56 +0800 | [diff] [blame] | 1041 | return goal_size > tc->snd_mss ? goal_size : tc->snd_mss; |
Simon Zhang | 1146ff4 | 2019-09-02 22:54:00 +0800 | [diff] [blame] | 1042 | } |
| 1043 | |
Florin Coras | 3af90fc | 2017-05-03 21:09:42 -0700 | [diff] [blame] | 1044 | always_inline u32 |
| 1045 | tcp_round_snd_space (tcp_connection_t * tc, u32 snd_space) |
| 1046 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1047 | if (PREDICT_FALSE (tc->snd_wnd < tc->snd_mss)) |
Florin Coras | 3af90fc | 2017-05-03 21:09:42 -0700 | [diff] [blame] | 1048 | { |
Florin Coras | db84e57 | 2017-05-09 18:54:52 -0700 | [diff] [blame] | 1049 | return tc->snd_wnd <= snd_space ? tc->snd_wnd : 0; |
Florin Coras | 3af90fc | 2017-05-03 21:09:42 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 1052 | /* If not snd_wnd constrained and we can't write at least a segment, |
| 1053 | * don't try at all */ |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1054 | if (PREDICT_FALSE (snd_space < tc->snd_mss)) |
Florin Coras | 9d06304 | 2017-09-14 03:08:00 -0400 | [diff] [blame] | 1055 | return snd_space < tc->cwnd ? 0 : snd_space; |
Florin Coras | 3af90fc | 2017-05-03 21:09:42 -0700 | [diff] [blame] | 1056 | |
| 1057 | /* round down to mss multiple */ |
| 1058 | return snd_space - (snd_space % tc->snd_mss); |
| 1059 | } |
| 1060 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1061 | /** |
| 1062 | * Compute tx window session is allowed to fill. |
Florin Coras | bb292f4 | 2017-05-19 09:49:19 -0700 | [diff] [blame] | 1063 | * |
| 1064 | * Takes into account available send space, snd_mss and the congestion |
| 1065 | * state of the connection. If possible, the value returned is a multiple |
| 1066 | * of snd_mss. |
| 1067 | * |
| 1068 | * @param tc tcp connection |
| 1069 | * @return number of bytes session is allowed to write |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1070 | */ |
Florin Coras | 45ca73f | 2018-09-27 09:19:29 -0700 | [diff] [blame] | 1071 | static inline u32 |
| 1072 | tcp_snd_space_inline (tcp_connection_t * tc) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1073 | { |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1074 | int snd_space; |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1075 | |
Florin Coras | 7d8100f | 2020-10-21 23:24:53 -0700 | [diff] [blame] | 1076 | /* Fast path is disabled when recovery is on. @ref tcp_session_custom_tx |
| 1077 | * controls both retransmits and the sending of new data while congested |
| 1078 | */ |
| 1079 | if (PREDICT_FALSE (tcp_in_cong_recovery (tc) |
Florin Coras | 4af830c | 2018-12-04 09:21:36 -0800 | [diff] [blame] | 1080 | || tc->state == TCP_STATE_CLOSED)) |
Florin Coras | 36ee9f1 | 2018-11-02 12:52:10 -0700 | [diff] [blame] | 1081 | return 0; |
| 1082 | |
| 1083 | snd_space = tcp_available_output_snd_space (tc); |
| 1084 | |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1085 | /* If we got dupacks or sacked bytes but we're not yet in recovery, try |
| 1086 | * to force the peer to send enough dupacks to start retransmitting as |
| 1087 | * per Limited Transmit (RFC3042) |
| 1088 | */ |
Florin Coras | cc4d6d0 | 2020-07-29 23:03:39 -0700 | [diff] [blame] | 1089 | if (PREDICT_FALSE (tc->rcv_dupacks || tc->sack_sb.sacked_bytes)) |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1090 | { |
Florin Coras | cc4d6d0 | 2020-07-29 23:03:39 -0700 | [diff] [blame] | 1091 | int snt_limited, n_pkts; |
| 1092 | |
| 1093 | n_pkts = tcp_opts_sack_permitted (&tc->rcv_opts) |
| 1094 | ? tc->sack_sb.reorder - 1 : 2; |
| 1095 | |
| 1096 | if ((seq_lt (tc->limited_transmit, tc->snd_nxt - n_pkts * tc->snd_mss) |
| 1097 | || seq_gt (tc->limited_transmit, tc->snd_nxt))) |
Florin Coras | 36ee9f1 | 2018-11-02 12:52:10 -0700 | [diff] [blame] | 1098 | tc->limited_transmit = tc->snd_nxt; |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1099 | |
Florin Coras | 36ee9f1 | 2018-11-02 12:52:10 -0700 | [diff] [blame] | 1100 | ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 1101 | |
Florin Coras | cc4d6d0 | 2020-07-29 23:03:39 -0700 | [diff] [blame] | 1102 | snt_limited = tc->snd_nxt - tc->limited_transmit; |
| 1103 | snd_space = clib_max (n_pkts * tc->snd_mss - snt_limited, 0); |
Florin Coras | 3af90fc | 2017-05-03 21:09:42 -0700 | [diff] [blame] | 1104 | } |
Florin Coras | 36ee9f1 | 2018-11-02 12:52:10 -0700 | [diff] [blame] | 1105 | return tcp_round_snd_space (tc, snd_space); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1106 | } |
| 1107 | |
Florin Coras | 45ca73f | 2018-09-27 09:19:29 -0700 | [diff] [blame] | 1108 | u32 |
| 1109 | tcp_snd_space (tcp_connection_t * tc) |
| 1110 | { |
| 1111 | return tcp_snd_space_inline (tc); |
| 1112 | } |
| 1113 | |
Florin Coras | 70f879d | 2020-03-13 17:54:42 +0000 | [diff] [blame] | 1114 | static int |
| 1115 | tcp_session_send_params (transport_connection_t * trans_conn, |
| 1116 | transport_send_params_t * sp) |
Florin Coras | bb292f4 | 2017-05-19 09:49:19 -0700 | [diff] [blame] | 1117 | { |
| 1118 | tcp_connection_t *tc = (tcp_connection_t *) trans_conn; |
Florin Coras | bb292f4 | 2017-05-19 09:49:19 -0700 | [diff] [blame] | 1119 | |
Florin Coras | 70f879d | 2020-03-13 17:54:42 +0000 | [diff] [blame] | 1120 | /* Ensure snd_mss does accurately reflect the amount of data we can push |
| 1121 | * in a segment. This also makes sure that options are updated according to |
| 1122 | * the current state of the connection. */ |
| 1123 | tcp_update_burst_snd_vars (tc); |
| 1124 | |
| 1125 | if (PREDICT_FALSE (tc->cfg_flags & TCP_CFG_F_TSO)) |
| 1126 | sp->snd_mss = tcp_session_cal_goal_size (tc); |
| 1127 | else |
| 1128 | sp->snd_mss = tc->snd_mss; |
| 1129 | |
| 1130 | sp->snd_space = clib_min (tcp_snd_space_inline (tc), |
| 1131 | tc->snd_wnd - (tc->snd_nxt - tc->snd_una)); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1132 | |
| 1133 | ASSERT (seq_geq (tc->snd_nxt, tc->snd_una)); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1134 | /* This still works if fast retransmit is on */ |
Florin Coras | 70f879d | 2020-03-13 17:54:42 +0000 | [diff] [blame] | 1135 | sp->tx_offset = tc->snd_nxt - tc->snd_una; |
| 1136 | |
Florin Coras | 6080e0d | 2020-03-13 20:39:43 +0000 | [diff] [blame] | 1137 | sp->flags = sp->snd_space ? 0 : TRANSPORT_SND_F_DESCHED; |
Florin Coras | 70f879d | 2020-03-13 17:54:42 +0000 | [diff] [blame] | 1138 | |
| 1139 | return 0; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1140 | } |
| 1141 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1142 | static void |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1143 | tcp_timer_waitclose_handler (tcp_connection_t * tc) |
| 1144 | { |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1145 | tcp_worker_ctx_t *wrk = tcp_get_worker (tc->c_thread_index); |
| 1146 | |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1147 | switch (tc->state) |
| 1148 | { |
| 1149 | case TCP_STATE_CLOSE_WAIT: |
| 1150 | tcp_connection_timers_reset (tc); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1151 | /* App never returned with a close */ |
| 1152 | if (!(tc->flags & TCP_CONN_FINPNDG)) |
| 1153 | { |
| 1154 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1155 | session_transport_closed_notify (&tc->connection); |
| 1156 | tcp_program_cleanup (wrk, tc); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1157 | tcp_worker_stats_inc (wrk, to_closewait, 1); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1158 | break; |
| 1159 | } |
| 1160 | |
| 1161 | /* Send FIN either way and switch to LAST_ACK. */ |
| 1162 | tcp_cong_recovery_off (tc); |
| 1163 | /* Make sure we don't try to send unsent data */ |
| 1164 | tc->snd_nxt = tc->snd_una; |
| 1165 | tcp_send_fin (tc); |
| 1166 | tcp_connection_set_state (tc, TCP_STATE_LAST_ACK); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1167 | session_transport_closed_notify (&tc->connection); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1168 | |
| 1169 | /* Make sure we don't wait in LAST ACK forever */ |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1170 | tcp_timer_set (&wrk->timer_wheel, tc, TCP_TIMER_WAITCLOSE, |
| 1171 | tcp_cfg.lastack_time); |
| 1172 | tcp_worker_stats_inc (wrk, to_closewait2, 1); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1173 | |
| 1174 | /* Don't delete the connection yet */ |
| 1175 | break; |
| 1176 | case TCP_STATE_FIN_WAIT_1: |
| 1177 | tcp_connection_timers_reset (tc); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1178 | if (tc->flags & TCP_CONN_FINPNDG) |
| 1179 | { |
| 1180 | /* If FIN pending, we haven't sent everything, but we did try. |
| 1181 | * Notify session layer that transport is closed. */ |
| 1182 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
| 1183 | tcp_send_reset (tc); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1184 | tcp_program_cleanup (wrk, tc); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1185 | } |
| 1186 | else |
| 1187 | { |
| 1188 | /* We've sent the fin but no progress. Close the connection and |
| 1189 | * to make sure everything is flushed, setup a cleanup timer */ |
| 1190 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1191 | tcp_program_cleanup (wrk, tc); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1192 | } |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1193 | session_transport_closed_notify (&tc->connection); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1194 | tcp_worker_stats_inc (wrk, to_finwait1, 1); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1195 | break; |
| 1196 | case TCP_STATE_LAST_ACK: |
| 1197 | tcp_connection_timers_reset (tc); |
| 1198 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1199 | session_transport_closed_notify (&tc->connection); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1200 | tcp_program_cleanup (wrk, tc); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1201 | tcp_worker_stats_inc (wrk, to_lastack, 1); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1202 | break; |
| 1203 | case TCP_STATE_CLOSING: |
| 1204 | tcp_connection_timers_reset (tc); |
| 1205 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1206 | session_transport_closed_notify (&tc->connection); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1207 | tcp_program_cleanup (wrk, tc); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1208 | tcp_worker_stats_inc (wrk, to_closing, 1); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1209 | break; |
| 1210 | case TCP_STATE_FIN_WAIT_2: |
| 1211 | tcp_send_reset (tc); |
| 1212 | tcp_connection_timers_reset (tc); |
| 1213 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
| 1214 | session_transport_closed_notify (&tc->connection); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1215 | tcp_program_cleanup (wrk, tc); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1216 | tcp_worker_stats_inc (wrk, to_finwait2, 1); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1217 | break; |
| 1218 | case TCP_STATE_TIME_WAIT: |
| 1219 | tcp_connection_set_state (tc, TCP_STATE_CLOSED); |
| 1220 | tcp_program_cleanup (wrk, tc); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1221 | break; |
| 1222 | default: |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1223 | clib_warning ("waitclose in state: %U", format_tcp_state, tc->state); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1224 | break; |
| 1225 | } |
| 1226 | } |
| 1227 | |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1228 | static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] = |
| 1229 | { |
| 1230 | tcp_timer_retransmit_handler, |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1231 | tcp_timer_persist_handler, |
| 1232 | tcp_timer_waitclose_handler, |
| 1233 | tcp_timer_retransmit_syn_handler, |
| 1234 | }; |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1235 | |
| 1236 | static void |
| 1237 | tcp_dispatch_pending_timers (tcp_worker_ctx_t * wrk) |
| 1238 | { |
| 1239 | u32 n_timers, connection_index, timer_id, thread_index, timer_handle; |
| 1240 | tcp_connection_t *tc; |
| 1241 | int i; |
| 1242 | |
| 1243 | if (!(n_timers = clib_fifo_elts (wrk->pending_timers))) |
| 1244 | return; |
| 1245 | |
| 1246 | thread_index = wrk->vm->thread_index; |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1247 | for (i = 0; i < clib_min (n_timers, wrk->max_timers_per_loop); i++) |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1248 | { |
| 1249 | clib_fifo_sub1 (wrk->pending_timers, timer_handle); |
| 1250 | connection_index = timer_handle & 0x0FFFFFFF; |
| 1251 | timer_id = timer_handle >> 28; |
| 1252 | |
| 1253 | if (PREDICT_TRUE (timer_id != TCP_TIMER_RETRANSMIT_SYN)) |
| 1254 | tc = tcp_connection_get (connection_index, thread_index); |
| 1255 | else |
| 1256 | tc = tcp_half_open_connection_get (connection_index); |
| 1257 | |
| 1258 | if (PREDICT_FALSE (!tc)) |
| 1259 | continue; |
| 1260 | |
Florin Coras | 1caf7f1 | 2020-07-16 10:05:02 -0700 | [diff] [blame] | 1261 | /* Skip if the timer is not pending. Probably it was reset while |
Florin Coras | aa04395 | 2020-10-08 13:33:20 -0700 | [diff] [blame] | 1262 | * waiting for dispatch */ |
Florin Coras | 1caf7f1 | 2020-07-16 10:05:02 -0700 | [diff] [blame] | 1263 | if (PREDICT_FALSE (!(tc->pending_timers & (1 << timer_id)))) |
| 1264 | continue; |
| 1265 | |
| 1266 | tc->pending_timers &= ~(1 << timer_id); |
| 1267 | |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1268 | /* Skip timer if it was rearmed while pending dispatch */ |
| 1269 | if (PREDICT_FALSE (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)) |
| 1270 | continue; |
| 1271 | |
| 1272 | (*timer_expiration_handlers[timer_id]) (tc); |
| 1273 | } |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1274 | |
| 1275 | if (thread_index == 0 && clib_fifo_elts (wrk->pending_timers)) |
Florin Coras | 5484daa | 2020-03-27 23:55:06 +0000 | [diff] [blame] | 1276 | session_queue_run_on_main_thread (wrk->vm); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1277 | } |
| 1278 | |
| 1279 | static void |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1280 | tcp_handle_cleanups (tcp_worker_ctx_t * wrk, clib_time_type_t now) |
| 1281 | { |
| 1282 | u32 thread_index = wrk->vm->thread_index; |
| 1283 | tcp_cleanup_req_t *req; |
| 1284 | tcp_connection_t *tc; |
| 1285 | |
| 1286 | while (clib_fifo_elts (wrk->pending_cleanups)) |
| 1287 | { |
| 1288 | req = clib_fifo_head (wrk->pending_cleanups); |
| 1289 | if (req->free_time > now) |
| 1290 | break; |
| 1291 | clib_fifo_sub2 (wrk->pending_cleanups, req); |
| 1292 | tc = tcp_connection_get (req->connection_index, thread_index); |
Florin Coras | 9f4db3c | 2020-03-10 19:34:28 +0000 | [diff] [blame] | 1293 | if (PREDICT_FALSE (!tc)) |
| 1294 | continue; |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1295 | session_transport_delete_notify (&tc->connection); |
| 1296 | tcp_connection_cleanup (tc); |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | static void |
Florin Coras | 561af9b | 2017-12-09 10:19:43 -0800 | [diff] [blame] | 1301 | tcp_update_time (f64 now, u8 thread_index) |
| 1302 | { |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1303 | tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index); |
| 1304 | |
Florin Coras | 8f10b90 | 2021-04-02 18:32:00 -0700 | [diff] [blame] | 1305 | tcp_set_time_now (wrk, now); |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1306 | tcp_handle_cleanups (wrk, now); |
Florin Coras | 49036a5 | 2020-10-08 09:28:32 -0700 | [diff] [blame] | 1307 | tcp_timer_expire_timers (&wrk->timer_wheel, now); |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1308 | tcp_dispatch_pending_timers (wrk); |
Florin Coras | 561af9b | 2017-12-09 10:19:43 -0800 | [diff] [blame] | 1309 | } |
| 1310 | |
Florin Coras | 42ceddb | 2018-12-12 10:56:01 -0800 | [diff] [blame] | 1311 | static void |
| 1312 | tcp_session_flush_data (transport_connection_t * tconn) |
| 1313 | { |
| 1314 | tcp_connection_t *tc = (tcp_connection_t *) tconn; |
| 1315 | if (tc->flags & TCP_CONN_PSH_PENDING) |
| 1316 | return; |
| 1317 | tc->flags |= TCP_CONN_PSH_PENDING; |
Florin Coras | 4759683 | 2019-03-12 18:58:54 -0700 | [diff] [blame] | 1318 | tc->psh_seq = tc->snd_una + transport_max_tx_dequeue (tconn) - 1; |
Florin Coras | 42ceddb | 2018-12-12 10:56:01 -0800 | [diff] [blame] | 1319 | } |
| 1320 | |
Florin Coras | 5a41fd5 | 2021-04-19 10:17:26 -0700 | [diff] [blame] | 1321 | static int |
| 1322 | tcp_session_app_rx_evt (transport_connection_t *conn) |
| 1323 | { |
| 1324 | tcp_connection_t *tc = (tcp_connection_t *) conn; |
| 1325 | u32 min_free, lo = 4 << 10, hi = 128 << 10; |
| 1326 | |
| 1327 | if (!(tc->flags & TCP_CONN_ZERO_RWND_SENT)) |
| 1328 | return 0; |
| 1329 | |
| 1330 | min_free = clib_clamp (transport_rx_fifo_size (conn) >> 3, lo, hi); |
| 1331 | if (transport_max_rx_enqueue (conn) < min_free) |
| 1332 | { |
| 1333 | transport_rx_fifo_req_deq_ntf (conn); |
| 1334 | return 0; |
| 1335 | } |
| 1336 | |
| 1337 | tcp_send_ack (tc); |
| 1338 | |
| 1339 | return 0; |
| 1340 | } |
| 1341 | |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 1342 | const static transport_proto_vft_t tcp_proto = { |
Florin Coras | 561af9b | 2017-12-09 10:19:43 -0800 | [diff] [blame] | 1343 | .enable = vnet_tcp_enable_disable, |
Florin Coras | 1ee7830 | 2019-02-05 15:51:15 -0800 | [diff] [blame] | 1344 | .start_listen = tcp_session_bind, |
| 1345 | .stop_listen = tcp_session_unbind, |
Florin Coras | 8b20bf5 | 2018-06-14 14:55:50 -0700 | [diff] [blame] | 1346 | .push_header = tcp_session_push_header, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1347 | .get_connection = tcp_session_get_transport, |
| 1348 | .get_listener = tcp_session_get_listener, |
| 1349 | .get_half_open = tcp_half_open_session_get_transport, |
Florin Coras | 04ae827 | 2021-04-12 19:55:37 -0700 | [diff] [blame] | 1350 | .attribute = tcp_session_attribute, |
Florin Coras | 1ee7830 | 2019-02-05 15:51:15 -0800 | [diff] [blame] | 1351 | .connect = tcp_session_open, |
liuyacan | 534468e | 2021-05-09 03:50:40 +0000 | [diff] [blame] | 1352 | .half_close = tcp_session_half_close, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1353 | .close = tcp_session_close, |
| 1354 | .cleanup = tcp_session_cleanup, |
Florin Coras | d50ff7f | 2020-04-16 04:30:22 +0000 | [diff] [blame] | 1355 | .cleanup_ho = tcp_session_cleanup_ho, |
Florin Coras | dfb3b87 | 2019-08-16 17:48:44 -0700 | [diff] [blame] | 1356 | .reset = tcp_session_reset, |
Florin Coras | 70f879d | 2020-03-13 17:54:42 +0000 | [diff] [blame] | 1357 | .send_params = tcp_session_send_params, |
Florin Coras | 561af9b | 2017-12-09 10:19:43 -0800 | [diff] [blame] | 1358 | .update_time = tcp_update_time, |
Florin Coras | 42ceddb | 2018-12-12 10:56:01 -0800 | [diff] [blame] | 1359 | .flush_data = tcp_session_flush_data, |
Florin Coras | 26dd6de | 2019-07-23 23:54:47 -0700 | [diff] [blame] | 1360 | .custom_tx = tcp_session_custom_tx, |
Florin Coras | 5a41fd5 | 2021-04-19 10:17:26 -0700 | [diff] [blame] | 1361 | .app_rx_evt = tcp_session_app_rx_evt, |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 1362 | .format_connection = format_tcp_session, |
| 1363 | .format_listener = format_tcp_listener_session, |
| 1364 | .format_half_open = format_tcp_half_open_session, |
Nathan Skrzypczak | e971bc9 | 2019-06-19 13:42:37 +0200 | [diff] [blame] | 1365 | .transport_options = { |
Florin Coras | 07063b8 | 2020-03-13 04:44:51 +0000 | [diff] [blame] | 1366 | .name = "tcp", |
| 1367 | .short_name = "T", |
Nathan Skrzypczak | e971bc9 | 2019-06-19 13:42:37 +0200 | [diff] [blame] | 1368 | .tx_type = TRANSPORT_TX_PEEK, |
| 1369 | .service_type = TRANSPORT_SERVICE_VC, |
| 1370 | }, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1371 | }; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1372 | |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1373 | void |
Florin Coras | c44a558 | 2018-11-01 16:30:54 -0700 | [diff] [blame] | 1374 | tcp_connection_tx_pacer_update (tcp_connection_t * tc) |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1375 | { |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1376 | if (!transport_connection_is_tx_paced (&tc->connection)) |
| 1377 | return; |
| 1378 | |
Florin Coras | 11e9e35 | 2019-11-13 19:09:47 -0800 | [diff] [blame] | 1379 | f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us); |
| 1380 | |
Florin Coras | d206724 | 2019-08-16 10:33:49 -0700 | [diff] [blame] | 1381 | transport_connection_tx_pacer_update (&tc->connection, |
Florin Coras | 11e9e35 | 2019-11-13 19:09:47 -0800 | [diff] [blame] | 1382 | tcp_cc_get_pacing_rate (tc), |
| 1383 | srtt * CLIB_US_TIME_FREQ); |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1384 | } |
| 1385 | |
Florin Coras | c44a558 | 2018-11-01 16:30:54 -0700 | [diff] [blame] | 1386 | void |
| 1387 | tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window, |
| 1388 | u32 start_bucket) |
| 1389 | { |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1390 | f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us); |
Florin Coras | 599db9e | 2019-11-25 09:41:37 -0800 | [diff] [blame] | 1391 | transport_connection_tx_pacer_reset (&tc->connection, |
| 1392 | tcp_cc_get_pacing_rate (tc), |
| 1393 | start_bucket, |
Florin Coras | 11e9e35 | 2019-11-13 19:09:47 -0800 | [diff] [blame] | 1394 | srtt * CLIB_US_TIME_FREQ); |
Florin Coras | c44a558 | 2018-11-01 16:30:54 -0700 | [diff] [blame] | 1395 | } |
| 1396 | |
Florin Coras | 6080e0d | 2020-03-13 20:39:43 +0000 | [diff] [blame] | 1397 | void |
| 1398 | tcp_reschedule (tcp_connection_t * tc) |
| 1399 | { |
| 1400 | if (tcp_in_cong_recovery (tc) || tcp_snd_space_inline (tc)) |
| 1401 | transport_connection_reschedule (&tc->connection); |
| 1402 | } |
| 1403 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1404 | static void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1405 | tcp_expired_timers_dispatch (u32 * expired_timers) |
| 1406 | { |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1407 | u32 thread_index = vlib_get_thread_index (), n_left, max_per_loop; |
| 1408 | u32 connection_index, timer_id, n_expired, max_loops; |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1409 | tcp_worker_ctx_t *wrk; |
Florin Coras | b72a0ff | 2019-11-22 17:38:25 -0800 | [diff] [blame] | 1410 | tcp_connection_t *tc; |
| 1411 | int i; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1412 | |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1413 | wrk = tcp_get_worker (thread_index); |
Florin Coras | 5e6305f | 2020-02-12 07:42:01 +0000 | [diff] [blame] | 1414 | n_expired = vec_len (expired_timers); |
Florin Coras | 0765d97 | 2020-03-18 21:26:41 +0000 | [diff] [blame] | 1415 | tcp_worker_stats_inc (wrk, timer_expirations, n_expired); |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1416 | n_left = clib_fifo_elts (wrk->pending_timers); |
Florin Coras | 5e6305f | 2020-02-12 07:42:01 +0000 | [diff] [blame] | 1417 | |
Florin Coras | b72a0ff | 2019-11-22 17:38:25 -0800 | [diff] [blame] | 1418 | /* |
| 1419 | * Invalidate all timer handles before dispatching. This avoids dangling |
| 1420 | * index references to timer wheel pool entries that have been freed. |
| 1421 | */ |
Florin Coras | 5e6305f | 2020-02-12 07:42:01 +0000 | [diff] [blame] | 1422 | for (i = 0; i < n_expired; i++) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1423 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1424 | connection_index = expired_timers[i] & 0x0FFFFFFF; |
| 1425 | timer_id = expired_timers[i] >> 28; |
| 1426 | |
Florin Coras | b72a0ff | 2019-11-22 17:38:25 -0800 | [diff] [blame] | 1427 | if (timer_id != TCP_TIMER_RETRANSMIT_SYN) |
| 1428 | tc = tcp_connection_get (connection_index, thread_index); |
| 1429 | else |
| 1430 | tc = tcp_half_open_connection_get (connection_index); |
| 1431 | |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 1432 | TCP_EVT (TCP_EVT_TIMER_POP, connection_index, timer_id); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 1433 | |
Florin Coras | b72a0ff | 2019-11-22 17:38:25 -0800 | [diff] [blame] | 1434 | tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID; |
Florin Coras | 1caf7f1 | 2020-07-16 10:05:02 -0700 | [diff] [blame] | 1435 | tc->pending_timers |= (1 << timer_id); |
Florin Coras | b72a0ff | 2019-11-22 17:38:25 -0800 | [diff] [blame] | 1436 | } |
| 1437 | |
Florin Coras | aa38869 | 2020-02-14 23:41:25 +0000 | [diff] [blame] | 1438 | clib_fifo_add (wrk->pending_timers, expired_timers, n_expired); |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1439 | |
Florin Coras | 273968c | 2022-01-03 10:34:52 -0800 | [diff] [blame] | 1440 | max_loops = |
| 1441 | clib_max ((u32) 0.5 * TCP_TIMER_TICK * wrk->vm->loops_per_second, 1); |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1442 | max_per_loop = clib_max ((n_left + n_expired) / max_loops, 10); |
| 1443 | max_per_loop = clib_min (max_per_loop, VLIB_FRAME_SIZE); |
| 1444 | wrk->max_timers_per_loop = clib_max (n_left ? wrk->max_timers_per_loop : 0, |
| 1445 | max_per_loop); |
| 1446 | |
| 1447 | if (thread_index == 0) |
Florin Coras | 5484daa | 2020-03-27 23:55:06 +0000 | [diff] [blame] | 1448 | session_queue_run_on_main_thread (wrk->vm); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1449 | } |
| 1450 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1451 | static void |
Florin Coras | 18e0d4f | 2019-01-02 12:22:02 -0800 | [diff] [blame] | 1452 | tcp_initialize_iss_seed (tcp_main_t * tm) |
| 1453 | { |
| 1454 | u32 default_seed = random_default_seed (); |
| 1455 | u64 time_now = clib_cpu_time_now (); |
| 1456 | |
| 1457 | tm->iss_seed.first = (u64) random_u32 (&default_seed) << 32; |
| 1458 | tm->iss_seed.second = random_u64 (&time_now); |
| 1459 | } |
| 1460 | |
Florin Coras | 6052f4b | 2023-06-21 20:02:25 -0700 | [diff] [blame] | 1461 | static void |
| 1462 | tcp_stats_collector_fn (vlib_stats_collector_data_t *d) |
| 1463 | { |
| 1464 | tcp_main_t *tm = vnet_get_tcp_main (); |
| 1465 | counter_t **counters = d->entry->data; |
| 1466 | counter_t *cb = counters[0]; |
| 1467 | tcp_wrk_stats_t acc = {}; |
| 1468 | tcp_worker_ctx_t *wrk; |
| 1469 | |
| 1470 | vec_foreach (wrk, tm->wrk_ctx) |
| 1471 | { |
| 1472 | #define _(name, type, str) acc.name += wrk->stats.name; |
| 1473 | foreach_tcp_wrk_stat |
| 1474 | #undef _ |
| 1475 | } |
| 1476 | |
| 1477 | #define _(name, type, str) cb[TCP_STAT_##name] = acc.name; |
| 1478 | foreach_tcp_wrk_stat |
| 1479 | #undef _ |
| 1480 | } |
| 1481 | |
| 1482 | static void |
Florin Coras | 503480d | 2023-06-24 18:57:17 -0700 | [diff] [blame] | 1483 | tcp_counters_init (tcp_main_t *tm) |
Florin Coras | 6052f4b | 2023-06-21 20:02:25 -0700 | [diff] [blame] | 1484 | { |
| 1485 | vlib_stats_collector_reg_t r = {}; |
| 1486 | u32 idx; |
| 1487 | |
Florin Coras | 503480d | 2023-06-24 18:57:17 -0700 | [diff] [blame] | 1488 | if (tm->counters_init) |
| 1489 | return; |
| 1490 | |
Florin Coras | 6052f4b | 2023-06-21 20:02:25 -0700 | [diff] [blame] | 1491 | r.entry_index = idx = vlib_stats_add_counter_vector ("/sys/tcp"); |
| 1492 | r.collect_fn = tcp_stats_collector_fn; |
| 1493 | vlib_stats_validate (idx, 0, TCP_STAT_no_buffer); |
| 1494 | |
| 1495 | #define _(name, type, str) \ |
| 1496 | vlib_stats_add_symlink (idx, TCP_STAT_##name, "/sys/tcp/%s", \ |
| 1497 | CLIB_STRING_MACRO (name)); |
| 1498 | foreach_tcp_wrk_stat |
| 1499 | #undef _ |
| 1500 | |
| 1501 | vlib_stats_register_collector_fn (&r); |
Florin Coras | 503480d | 2023-06-24 18:57:17 -0700 | [diff] [blame] | 1502 | |
| 1503 | tm->counters_init = 1; |
Florin Coras | 6052f4b | 2023-06-21 20:02:25 -0700 | [diff] [blame] | 1504 | } |
| 1505 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1506 | static clib_error_t * |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 1507 | tcp_main_enable (vlib_main_t * vm) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1508 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1509 | vlib_thread_main_t *vtm = vlib_get_thread_main (); |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1510 | u32 num_threads, n_workers, prealloc_conn_per_wrk; |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1511 | tcp_connection_t *tc __attribute__ ((unused)); |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1512 | tcp_main_t *tm = vnet_get_tcp_main (); |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 1513 | tcp_worker_ctx_t *wrk; |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1514 | clib_error_t *error = 0; |
| 1515 | int thread; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1516 | |
Florin Coras | 75e8e1e | 2024-07-02 04:34:54 -0700 | [diff] [blame] | 1517 | /* Already initialized */ |
| 1518 | if (tm->wrk_ctx) |
| 1519 | return 0; |
| 1520 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1521 | if ((error = vlib_call_init_function (vm, ip_main_init))) |
| 1522 | return error; |
| 1523 | if ((error = vlib_call_init_function (vm, ip4_lookup_init))) |
| 1524 | return error; |
| 1525 | if ((error = vlib_call_init_function (vm, ip6_lookup_init))) |
| 1526 | return error; |
| 1527 | |
| 1528 | /* |
| 1529 | * Registrations |
| 1530 | */ |
| 1531 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1532 | ip4_register_protocol (IP_PROTOCOL_TCP, tcp4_input_node.index); |
root | c9d1c5b | 2017-08-15 12:58:31 -0400 | [diff] [blame] | 1533 | ip6_register_protocol (IP_PROTOCOL_TCP, tcp6_input_node.index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1534 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1535 | /* |
| 1536 | * Initialize data structures |
| 1537 | */ |
| 1538 | |
| 1539 | num_threads = 1 /* main thread */ + vtm->n_threads; |
Florin Coras | e55a6d7 | 2018-10-31 23:09:22 -0700 | [diff] [blame] | 1540 | vec_validate (tm->wrk_ctx, num_threads - 1); |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1541 | n_workers = num_threads == 1 ? 1 : vtm->n_threads; |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1542 | prealloc_conn_per_wrk = tcp_cfg.preallocated_connections / n_workers; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1543 | |
Florin Coras | 5484daa | 2020-03-27 23:55:06 +0000 | [diff] [blame] | 1544 | wrk = &tm->wrk_ctx[0]; |
| 1545 | wrk->tco_next_node[0] = vlib_node_get_next (vm, session_queue_node.index, |
| 1546 | tcp4_output_node.index); |
| 1547 | wrk->tco_next_node[1] = vlib_node_get_next (vm, session_queue_node.index, |
| 1548 | tcp6_output_node.index); |
| 1549 | |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1550 | for (thread = 0; thread < num_threads; thread++) |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1551 | { |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 1552 | wrk = &tm->wrk_ctx[thread]; |
| 1553 | |
| 1554 | vec_validate (wrk->pending_deq_acked, 255); |
| 1555 | vec_validate (wrk->pending_disconnects, 255); |
| 1556 | vec_validate (wrk->pending_resets, 255); |
| 1557 | vec_reset_length (wrk->pending_deq_acked); |
| 1558 | vec_reset_length (wrk->pending_disconnects); |
| 1559 | vec_reset_length (wrk->pending_resets); |
Damjan Marion | 6ffb7c6 | 2021-03-26 13:06:13 +0100 | [diff] [blame] | 1560 | wrk->vm = vlib_get_main_by_index (thread); |
Florin Coras | a9d8cb4 | 2020-02-20 05:45:31 +0000 | [diff] [blame] | 1561 | wrk->max_timers_per_loop = 10; |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1562 | |
Florin Coras | 5484daa | 2020-03-27 23:55:06 +0000 | [diff] [blame] | 1563 | if (thread > 0) |
| 1564 | { |
| 1565 | wrk->tco_next_node[0] = tm->wrk_ctx[0].tco_next_node[0]; |
| 1566 | wrk->tco_next_node[1] = tm->wrk_ctx[0].tco_next_node[1]; |
| 1567 | } |
| 1568 | |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1569 | /* |
| 1570 | * Preallocate connections. Assume that thread 0 won't |
| 1571 | * use preallocated threads when running multi-core |
| 1572 | */ |
| 1573 | if ((thread > 0 || num_threads == 1) && prealloc_conn_per_wrk) |
Florin Coras | 0426185 | 2020-02-12 01:24:29 +0000 | [diff] [blame] | 1574 | pool_init_fixed (wrk->connections, prealloc_conn_per_wrk); |
Florin Coras | 49036a5 | 2020-10-08 09:28:32 -0700 | [diff] [blame] | 1575 | |
| 1576 | tcp_timer_initialize_wheel (&wrk->timer_wheel, |
| 1577 | tcp_expired_timers_dispatch, |
| 1578 | vlib_time_now (vm)); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1579 | } |
| 1580 | |
Florin Coras | 18e0d4f | 2019-01-02 12:22:02 -0800 | [diff] [blame] | 1581 | tcp_initialize_iss_seed (tm); |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1582 | |
Damjan Marion | 8934a04 | 2019-02-09 23:29:26 +0100 | [diff] [blame] | 1583 | tm->bytes_per_buffer = vlib_buffer_get_default_data_size (vm); |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 1584 | tm->cc_last_type = TCP_CC_LAST; |
Florin Coras | 5484daa | 2020-03-27 23:55:06 +0000 | [diff] [blame] | 1585 | |
Florin Coras | 503480d | 2023-06-24 18:57:17 -0700 | [diff] [blame] | 1586 | tcp_counters_init (tm); |
Florin Coras | 6052f4b | 2023-06-21 20:02:25 -0700 | [diff] [blame] | 1587 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1588 | return error; |
| 1589 | } |
| 1590 | |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 1591 | clib_error_t * |
| 1592 | vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en) |
| 1593 | { |
| 1594 | if (is_en) |
| 1595 | { |
| 1596 | if (tcp_main.is_enabled) |
| 1597 | return 0; |
| 1598 | |
| 1599 | return tcp_main_enable (vm); |
| 1600 | } |
| 1601 | else |
| 1602 | { |
| 1603 | tcp_main.is_enabled = 0; |
| 1604 | } |
| 1605 | |
| 1606 | return 0; |
| 1607 | } |
| 1608 | |
Pierre Pfister | 7fe51f3 | 2017-09-20 08:48:36 +0200 | [diff] [blame] | 1609 | void |
| 1610 | tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add) |
| 1611 | { |
| 1612 | tcp_main_t *tm = &tcp_main; |
| 1613 | if (is_ip4) |
| 1614 | tm->punt_unknown4 = is_add; |
| 1615 | else |
| 1616 | tm->punt_unknown6 = is_add; |
| 1617 | } |
| 1618 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1619 | /** |
| 1620 | * Initialize default values for tcp parameters |
| 1621 | */ |
| 1622 | static void |
| 1623 | tcp_configuration_init (void) |
| 1624 | { |
| 1625 | /* Initial wnd for SYN. Fifos are not allocated at that point so use some |
| 1626 | * predefined value. For SYN-ACK we still want the scale to be computed in |
| 1627 | * the same way */ |
| 1628 | tcp_cfg.max_rx_fifo = 32 << 20; |
| 1629 | tcp_cfg.min_rx_fifo = 4 << 10; |
| 1630 | |
Florin Coras | cedcf60 | 2019-08-27 12:15:43 -0700 | [diff] [blame] | 1631 | tcp_cfg.default_mtu = 1500; |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1632 | tcp_cfg.initial_cwnd_multiplier = 0; |
| 1633 | tcp_cfg.enable_tx_pacing = 1; |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 1634 | tcp_cfg.allow_tso = 0; |
Florin Coras | f4ce6ba | 2019-11-20 18:34:58 -0800 | [diff] [blame] | 1635 | tcp_cfg.csum_offload = 1; |
Florin Coras | e57df7c | 2020-04-17 16:10:51 +0000 | [diff] [blame] | 1636 | tcp_cfg.cc_algo = TCP_CC_CUBIC; |
Florin Coras | 017dc45 | 2019-08-30 11:06:35 -0700 | [diff] [blame] | 1637 | tcp_cfg.rwnd_min_update_ack = 1; |
Simon Zhang | 23c3d34 | 2020-09-15 23:40:28 +0800 | [diff] [blame] | 1638 | tcp_cfg.max_gso_size = TCP_MAX_GSO_SZ; |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1639 | |
Ryujiro Shibuya | 6fa0988 | 2020-10-22 05:26:32 +0000 | [diff] [blame] | 1640 | /* Time constants defined as timer tick (100us) multiples */ |
Ryujiro Shibuya | 6fa0988 | 2020-10-22 05:26:32 +0000 | [diff] [blame] | 1641 | tcp_cfg.closewait_time = 20000; /* 2s */ |
| 1642 | tcp_cfg.timewait_time = 100000; /* 10s */ |
| 1643 | tcp_cfg.finwait1_time = 600000; /* 60s */ |
| 1644 | tcp_cfg.lastack_time = 300000; /* 30s */ |
| 1645 | tcp_cfg.finwait2_time = 300000; /* 30s */ |
| 1646 | tcp_cfg.closing_time = 300000; /* 30s */ |
liuyacan | 7e78119 | 2021-06-14 18:09:01 +0800 | [diff] [blame] | 1647 | tcp_cfg.alloc_err_timeout = 1000; /* 100ms */ |
Ryujiro Shibuya | 6fa0988 | 2020-10-22 05:26:32 +0000 | [diff] [blame] | 1648 | |
| 1649 | /* This value is seconds */ |
Florin Coras | 7a3a866 | 2020-02-22 02:27:21 +0000 | [diff] [blame] | 1650 | tcp_cfg.cleanup_time = 0.1; /* 100ms */ |
Florin Coras | 1c30d2d | 2024-06-10 13:12:40 -0700 | [diff] [blame] | 1651 | |
| 1652 | /* Time constants defined as tcp tick (1us) multiples */ |
| 1653 | tcp_cfg.syn_rcvd_time = TCP_ESTABLISH_TIME; |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1654 | } |
| 1655 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1656 | static clib_error_t * |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 1657 | tcp_init (vlib_main_t * vm) |
| 1658 | { |
| 1659 | tcp_main_t *tm = vnet_get_tcp_main (); |
Florin Coras | 4036427 | 2017-11-16 09:57:50 -0800 | [diff] [blame] | 1660 | ip_main_t *im = &ip_main; |
| 1661 | ip_protocol_info_t *pi; |
| 1662 | |
| 1663 | /* Session layer, and by implication tcp, are disabled by default */ |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 1664 | tm->is_enabled = 0; |
Florin Coras | 4036427 | 2017-11-16 09:57:50 -0800 | [diff] [blame] | 1665 | |
| 1666 | /* Register with IP for header parsing */ |
| 1667 | pi = ip_get_protocol_info (im, IP_PROTOCOL_TCP); |
| 1668 | if (pi == 0) |
| 1669 | return clib_error_return (0, "TCP protocol info AWOL"); |
| 1670 | pi->format_header = format_tcp_header; |
| 1671 | pi->unformat_pg_edit = unformat_pg_tcp_header; |
| 1672 | |
Florin Coras | 561af9b | 2017-12-09 10:19:43 -0800 | [diff] [blame] | 1673 | /* Register as transport with session layer */ |
| 1674 | transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto, |
| 1675 | FIB_PROTOCOL_IP4, tcp4_output_node.index); |
| 1676 | transport_register_protocol (TRANSPORT_PROTO_TCP, &tcp_proto, |
| 1677 | FIB_PROTOCOL_IP6, tcp6_output_node.index); |
| 1678 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1679 | tcp_configuration_init (); |
| 1680 | |
Florin Coras | fbf278a | 2019-03-26 14:05:38 -0700 | [diff] [blame] | 1681 | tm->cc_algo_by_name = hash_create_string (0, sizeof (uword)); |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1682 | |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 1683 | return 0; |
| 1684 | } |
| 1685 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1686 | VLIB_INIT_FUNCTION (tcp_init); |
| 1687 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1688 | /* |
| 1689 | * fd.io coding-style-patch-verification: ON |
| 1690 | * |
| 1691 | * Local Variables: |
| 1692 | * eval: (c-set-style "gnu") |
| 1693 | * End: |
| 1694 | */ |