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 | |
| 16 | #ifndef _vnet_tcp_h_ |
| 17 | #define _vnet_tcp_h_ |
| 18 | |
| 19 | #include <vnet/vnet.h> |
| 20 | #include <vnet/ip/ip.h> |
| 21 | #include <vnet/tcp/tcp_packet.h> |
| 22 | #include <vnet/tcp/tcp_timer.h> |
| 23 | #include <vnet/session/transport.h> |
| 24 | #include <vnet/session/session.h> |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 25 | #include <vnet/tcp/tcp_debug.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 26 | |
Florin Coras | 3af90fc | 2017-05-03 21:09:42 -0700 | [diff] [blame] | 27 | #define TCP_TICK 0.001 /**< TCP tick period (s) */ |
| 28 | #define THZ (u32) (1/TCP_TICK) /**< TCP tick frequency */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 29 | #define TCP_TSTAMP_RESOLUTION TCP_TICK /**< Time stamp resolution */ |
| 30 | #define TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ /**< 24 days */ |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 31 | #define TCP_FIB_RECHECK_PERIOD 1 * THZ /**< Recheck every 1s */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 32 | #define TCP_MAX_OPTION_SPACE 40 |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 33 | #define TCP_CC_DATA_SZ 24 |
Simon Zhang | 1146ff4 | 2019-09-02 22:54:00 +0800 | [diff] [blame] | 34 | #define TCP_MAX_GSO_SZ 65536 |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 35 | #define TCP_RXT_MAX_BURST 10 |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 36 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 37 | #define TCP_DUPACK_THRESHOLD 3 |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 38 | #define TCP_IW_N_SEGMENTS 10 |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 39 | #define TCP_ALWAYS_ACK 1 /**< On/off delayed acks */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 40 | #define TCP_USE_SACKS 1 /**< Disable only for testing */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 41 | |
| 42 | /** TCP FSM state definitions as per RFC793. */ |
| 43 | #define foreach_tcp_fsm_state \ |
| 44 | _(CLOSED, "CLOSED") \ |
| 45 | _(LISTEN, "LISTEN") \ |
| 46 | _(SYN_SENT, "SYN_SENT") \ |
| 47 | _(SYN_RCVD, "SYN_RCVD") \ |
| 48 | _(ESTABLISHED, "ESTABLISHED") \ |
| 49 | _(CLOSE_WAIT, "CLOSE_WAIT") \ |
| 50 | _(FIN_WAIT_1, "FIN_WAIT_1") \ |
| 51 | _(LAST_ACK, "LAST_ACK") \ |
| 52 | _(CLOSING, "CLOSING") \ |
| 53 | _(FIN_WAIT_2, "FIN_WAIT_2") \ |
| 54 | _(TIME_WAIT, "TIME_WAIT") |
| 55 | |
| 56 | typedef enum _tcp_state |
| 57 | { |
| 58 | #define _(sym, str) TCP_STATE_##sym, |
| 59 | foreach_tcp_fsm_state |
| 60 | #undef _ |
| 61 | TCP_N_STATES |
| 62 | } tcp_state_t; |
| 63 | |
| 64 | format_function_t format_tcp_state; |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 65 | format_function_t format_tcp_flags; |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 66 | format_function_t format_tcp_sacks; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 67 | format_function_t format_tcp_rcv_sacks; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 68 | |
| 69 | /** TCP timers */ |
| 70 | #define foreach_tcp_timer \ |
| 71 | _(RETRANSMIT, "RETRANSMIT") \ |
| 72 | _(DELACK, "DELAYED ACK") \ |
| 73 | _(PERSIST, "PERSIST") \ |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 74 | _(WAITCLOSE, "WAIT CLOSE") \ |
| 75 | _(RETRANSMIT_SYN, "RETRANSMIT SYN") \ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 76 | |
| 77 | typedef enum _tcp_timers |
| 78 | { |
| 79 | #define _(sym, str) TCP_TIMER_##sym, |
| 80 | foreach_tcp_timer |
| 81 | #undef _ |
| 82 | TCP_N_TIMERS |
| 83 | } tcp_timers_e; |
| 84 | |
| 85 | typedef void (timer_expiration_handler) (u32 index); |
| 86 | |
| 87 | extern timer_expiration_handler tcp_timer_delack_handler; |
| 88 | extern timer_expiration_handler tcp_timer_retransmit_handler; |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 89 | extern timer_expiration_handler tcp_timer_persist_handler; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 90 | extern timer_expiration_handler tcp_timer_retransmit_syn_handler; |
| 91 | |
| 92 | #define TCP_TIMER_HANDLE_INVALID ((u32) ~0) |
| 93 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 94 | #define TCP_TIMER_TICK 0.1 /**< Timer tick in seconds */ |
| 95 | #define TCP_TO_TIMER_TICK TCP_TICK*10 /**< Factor for converting |
| 96 | ticks to timer ticks */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 97 | |
| 98 | #define TCP_RTO_MAX 60 * THZ /* Min max RTO (60s) as per RFC6298 */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 99 | #define TCP_RTO_MIN 0.2 * THZ /* Min RTO (200ms) - lower than standard */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 100 | #define TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */ |
| 101 | #define TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */ |
| 102 | #define TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */ |
Florin Coras | 548f757 | 2019-06-07 15:31:06 -0700 | [diff] [blame] | 103 | #define TCP_RTO_BOFF_MAX 8 /* Max number of retries before reset */ |
Florin Coras | 75c48c1 | 2019-08-02 15:17:21 -0700 | [diff] [blame] | 104 | #define TCP_ESTABLISH_TIME (60 * THZ) /* Connection establish timeout */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 105 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 106 | /** Connection configuration flags */ |
| 107 | #define foreach_tcp_cfg_flag \ |
| 108 | _(RATE_SAMPLE, "Rate sampling") \ |
| 109 | _(NO_CSUM_OFFLOAD, "No csum offload") \ |
| 110 | _(NO_TSO, "TSO off") \ |
| 111 | _(TSO, "TSO") \ |
| 112 | |
| 113 | typedef enum tcp_cfg_flag_bits_ |
| 114 | { |
| 115 | #define _(sym, str) TCP_CFG_F_##sym##_BIT, |
| 116 | foreach_tcp_cfg_flag |
| 117 | #undef _ |
| 118 | TCP_CFG_N_FLAG_BITS |
| 119 | } tcp_cfg_flag_bits_e; |
| 120 | |
| 121 | typedef enum tcp_cfg_flag_ |
| 122 | { |
| 123 | #define _(sym, str) TCP_CFG_F_##sym = 1 << TCP_CFG_F_##sym##_BIT, |
| 124 | foreach_tcp_cfg_flag |
| 125 | #undef _ |
| 126 | TCP_CFG_N_FLAGS |
| 127 | } tcp_cfg_flags_e; |
| 128 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 129 | /** TCP connection flags */ |
| 130 | #define foreach_tcp_connection_flag \ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 131 | _(SNDACK, "Send ACK") \ |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 132 | _(FINSNT, "FIN sent") \ |
Florin Coras | a096f2d | 2017-09-28 23:49:42 -0400 | [diff] [blame] | 133 | _(RECOVERY, "Recovery") \ |
| 134 | _(FAST_RECOVERY, "Fast Recovery") \ |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 135 | _(DCNT_PENDING, "Disconnect pending") \ |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 136 | _(HALF_OPEN_DONE, "Half-open completed") \ |
Florin Coras | ca1c8f3 | 2018-05-23 21:01:30 -0700 | [diff] [blame] | 137 | _(FINPNDG, "FIN pending") \ |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 138 | _(RXT_PENDING, "Retransmit pending") \ |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 139 | _(FRXT_FIRST, "Retransmit first") \ |
| 140 | _(DEQ_PENDING, "Dequeue pending ") \ |
Florin Coras | e96bf63 | 2018-12-18 22:44:27 -0800 | [diff] [blame] | 141 | _(PSH_PENDING, "PSH pending") \ |
Florin Coras | f65074e | 2019-03-31 17:17:11 -0700 | [diff] [blame] | 142 | _(FINRCVD, "FIN received") \ |
Vladimir Kropylev | 398afbd | 2019-06-25 00:06:52 +0300 | [diff] [blame] | 143 | _(ZERO_RWND_SENT, "Zero RWND sent") \ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 144 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 145 | typedef enum tcp_connection_flag_bits_ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 146 | { |
| 147 | #define _(sym, str) TCP_CONN_##sym##_BIT, |
| 148 | foreach_tcp_connection_flag |
| 149 | #undef _ |
| 150 | TCP_CONN_N_FLAG_BITS |
| 151 | } tcp_connection_flag_bits_e; |
| 152 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 153 | typedef enum tcp_connection_flag_ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 154 | { |
| 155 | #define _(sym, str) TCP_CONN_##sym = 1 << TCP_CONN_##sym##_BIT, |
| 156 | foreach_tcp_connection_flag |
| 157 | #undef _ |
| 158 | TCP_CONN_N_FLAGS |
| 159 | } tcp_connection_flags_e; |
| 160 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 161 | #define TCP_SCOREBOARD_TRACE (0) |
Florin Coras | e55a6d7 | 2018-10-31 23:09:22 -0700 | [diff] [blame] | 162 | #define TCP_MAX_SACK_BLOCKS 256 /**< Max number of SACK blocks stored */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 163 | #define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0) |
| 164 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 165 | typedef struct _scoreboard_trace_elt |
| 166 | { |
| 167 | u32 start; |
| 168 | u32 end; |
| 169 | u32 ack; |
| 170 | u32 snd_una_max; |
| 171 | u32 group; |
| 172 | } scoreboard_trace_elt_t; |
| 173 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 174 | typedef struct _sack_scoreboard_hole |
| 175 | { |
| 176 | u32 next; /**< Index for next entry in linked list */ |
| 177 | u32 prev; /**< Index for previous entry in linked list */ |
| 178 | u32 start; /**< Start sequence number */ |
| 179 | u32 end; /**< End sequence number */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 180 | u8 is_lost; /**< Mark hole as lost */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 181 | } sack_scoreboard_hole_t; |
| 182 | |
| 183 | typedef struct _sack_scoreboard |
| 184 | { |
| 185 | sack_scoreboard_hole_t *holes; /**< Pool of holes */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 186 | u32 head; /**< Index of first entry */ |
| 187 | u32 tail; /**< Index of last entry */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 188 | u32 sacked_bytes; /**< Number of bytes sacked in sb */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 189 | u32 last_sacked_bytes; /**< Number of bytes last sacked */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 190 | u32 last_bytes_delivered; /**< Sack bytes delivered to app */ |
Florin Coras | be237bf | 2019-09-27 08:16:40 -0700 | [diff] [blame] | 191 | u32 rxt_sacked; /**< Rxt bytes last delivered */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 192 | u32 high_sacked; /**< Highest byte sacked (fack) */ |
| 193 | u32 high_rxt; /**< Highest retransmitted sequence */ |
| 194 | u32 rescue_rxt; /**< Rescue sequence number */ |
| 195 | u32 lost_bytes; /**< Bytes lost as per RFC6675 */ |
Florin Coras | b3f58e1 | 2019-07-05 18:31:54 -0700 | [diff] [blame] | 196 | u32 last_lost_bytes; /**< Number of bytes last lost */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 197 | u32 cur_rxt_hole; /**< Retransmitting from this hole */ |
Florin Coras | 558e3e0 | 2019-09-06 12:56:58 -0700 | [diff] [blame] | 198 | u8 is_reneging; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 199 | |
| 200 | #if TCP_SCOREBOARD_TRACE |
| 201 | scoreboard_trace_elt_t *trace; |
| 202 | #endif |
| 203 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 204 | } sack_scoreboard_t; |
| 205 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 206 | #if TCP_SCOREBOARD_TRACE |
| 207 | #define tcp_scoreboard_trace_add(_tc, _ack) \ |
| 208 | { \ |
| 209 | static u64 _group = 0; \ |
| 210 | sack_scoreboard_t *_sb = &_tc->sack_sb; \ |
| 211 | sack_block_t *_sack, *_sacks; \ |
| 212 | scoreboard_trace_elt_t *_elt; \ |
| 213 | int i; \ |
| 214 | _group++; \ |
| 215 | _sacks = _tc->rcv_opts.sacks; \ |
| 216 | for (i = 0; i < vec_len (_sacks); i++) \ |
| 217 | { \ |
| 218 | _sack = &_sacks[i]; \ |
| 219 | vec_add2 (_sb->trace, _elt, 1); \ |
| 220 | _elt->start = _sack->start; \ |
| 221 | _elt->end = _sack->end; \ |
| 222 | _elt->ack = _elt->end == _ack ? _ack : 0; \ |
| 223 | _elt->snd_una_max = _elt->end == _ack ? _tc->snd_una_max : 0; \ |
| 224 | _elt->group = _group; \ |
| 225 | } \ |
| 226 | } |
| 227 | #else |
| 228 | #define tcp_scoreboard_trace_add(_tc, _ack) |
| 229 | #endif |
| 230 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 231 | sack_scoreboard_hole_t *scoreboard_next_rxt_hole (sack_scoreboard_t * sb, |
| 232 | sack_scoreboard_hole_t * |
| 233 | start, u8 have_sent_1_smss, |
| 234 | u8 * can_rescue, |
| 235 | u8 * snd_limited); |
| 236 | sack_scoreboard_hole_t *scoreboard_get_hole (sack_scoreboard_t * sb, |
| 237 | u32 index); |
| 238 | |
| 239 | sack_scoreboard_hole_t *scoreboard_next_hole (sack_scoreboard_t * sb, |
| 240 | sack_scoreboard_hole_t * hole); |
| 241 | sack_scoreboard_hole_t *scoreboard_prev_hole (sack_scoreboard_t * sb, |
| 242 | sack_scoreboard_hole_t * hole); |
| 243 | sack_scoreboard_hole_t *scoreboard_first_hole (sack_scoreboard_t * sb); |
| 244 | sack_scoreboard_hole_t *scoreboard_last_hole (sack_scoreboard_t * sb); |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 245 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 246 | void scoreboard_clear (sack_scoreboard_t * sb); |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 247 | void scoreboard_clear_reneging (sack_scoreboard_t * sb, u32 start, u32 end); |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 248 | void scoreboard_init (sack_scoreboard_t * sb); |
Florin Coras | be237bf | 2019-09-27 08:16:40 -0700 | [diff] [blame] | 249 | void scoreboard_init_rxt (sack_scoreboard_t * sb, u32 snd_una); |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 250 | u8 *format_tcp_scoreboard (u8 * s, va_list * args); |
| 251 | |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 252 | #define TCP_BTS_INVALID_INDEX ((u32)~0) |
| 253 | |
| 254 | typedef enum tcp_bts_flags_ |
| 255 | { |
| 256 | TCP_BTS_IS_RXT = 1, |
| 257 | TCP_BTS_IS_APP_LIMITED = 1 << 1, |
Florin Coras | d6ae4bf | 2019-10-12 18:10:20 -0700 | [diff] [blame] | 258 | TCP_BTS_IS_SACKED = 1 << 2, |
Florin Coras | 46ec6e0 | 2019-10-22 13:34:30 -0700 | [diff] [blame] | 259 | TCP_BTS_IS_RXT_LOST = 1 << 3, |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 260 | } __clib_packed tcp_bts_flags_t; |
| 261 | |
| 262 | typedef struct tcp_bt_sample_ |
| 263 | { |
| 264 | u32 next; /**< Next sample index in list */ |
| 265 | u32 prev; /**< Previous sample index in list */ |
| 266 | u32 min_seq; /**< Min seq number in sample */ |
| 267 | u32 max_seq; /**< Max seq number. Set for rxt samples */ |
Florin Coras | 85fc130 | 2019-06-26 09:12:34 -0700 | [diff] [blame] | 268 | u64 delivered; /**< Total delivered bytes for sample */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 269 | f64 delivered_time; /**< Delivered time when sample taken */ |
Florin Coras | 85fc130 | 2019-06-26 09:12:34 -0700 | [diff] [blame] | 270 | f64 tx_time; /**< Transmit time for the burst */ |
Florin Coras | 7436b43 | 2019-09-10 23:26:27 -0700 | [diff] [blame] | 271 | f64 first_tx_time; /**< Connection first tx time at tx */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 272 | tcp_bts_flags_t flags; /**< Sample flag */ |
| 273 | } tcp_bt_sample_t; |
| 274 | |
| 275 | typedef struct tcp_rate_sample_ |
| 276 | { |
Florin Coras | 85fc130 | 2019-06-26 09:12:34 -0700 | [diff] [blame] | 277 | u64 prior_delivered; /**< Delivered of sample used for rate, i.e., |
| 278 | total bytes delivered at prior_time */ |
| 279 | f64 prior_time; /**< Delivered time of sample used for rate */ |
| 280 | f64 interval_time; /**< Time to ack the bytes delivered */ |
| 281 | f64 rtt_time; /**< RTT for sample */ |
Florin Coras | 85fc130 | 2019-06-26 09:12:34 -0700 | [diff] [blame] | 282 | u32 delivered; /**< Bytes delivered in interval_time */ |
| 283 | u32 acked_and_sacked; /**< Bytes acked + sacked now */ |
| 284 | u32 lost; /**< Bytes lost now */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 285 | tcp_bts_flags_t flags; /**< Rate sample flags from bt sample */ |
| 286 | } tcp_rate_sample_t; |
| 287 | |
| 288 | typedef struct tcp_byte_tracker_ |
| 289 | { |
| 290 | tcp_bt_sample_t *samples; /**< Pool of samples */ |
| 291 | rb_tree_t sample_lookup; /**< Rbtree for sample lookup by min_seq */ |
| 292 | u32 head; /**< Head of samples linked list */ |
| 293 | u32 tail; /**< Tail of samples linked list */ |
| 294 | u32 last_ooo; /**< Cached last ooo sample */ |
| 295 | } tcp_byte_tracker_t; |
| 296 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 297 | typedef enum _tcp_cc_algorithm_type |
| 298 | { |
| 299 | TCP_CC_NEWRENO, |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 300 | TCP_CC_CUBIC, |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 301 | TCP_CC_LAST = TCP_CC_CUBIC |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 302 | } tcp_cc_algorithm_type_e; |
| 303 | |
| 304 | typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t; |
| 305 | |
| 306 | typedef enum _tcp_cc_ack_t |
| 307 | { |
| 308 | TCP_CC_ACK, |
| 309 | TCP_CC_DUPACK, |
| 310 | TCP_CC_PARTIALACK |
| 311 | } tcp_cc_ack_t; |
| 312 | |
Florin Coras | ca2831a | 2019-07-04 17:05:59 -0700 | [diff] [blame] | 313 | typedef enum tcp_cc_event_ |
| 314 | { |
| 315 | TCP_CC_EVT_START_TX, |
| 316 | } tcp_cc_event_t; |
| 317 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 318 | /* |
| 319 | * As per RFC4898 tcpEStatsStackSoftErrors |
| 320 | */ |
| 321 | typedef struct tcp_errors_ |
| 322 | { |
| 323 | u32 below_data_wnd; /**< All data in seg is below snd_una */ |
| 324 | u32 above_data_wnd; /**< Some data in segment is above snd_wnd */ |
| 325 | u32 below_ack_wnd; /**< Acks for data below snd_una */ |
| 326 | u32 above_ack_wnd; /**< Acks for data not sent */ |
| 327 | } tcp_errors_t; |
| 328 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 329 | typedef struct _tcp_connection |
| 330 | { |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 331 | CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 332 | transport_connection_t connection; /**< Common transport data. First! */ |
| 333 | |
| 334 | u8 state; /**< TCP state as per tcp_state_t */ |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 335 | u8 cfg_flags; /**< Connection configuration flags */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 336 | u16 flags; /**< Connection flags (see tcp_conn_flags_e) */ |
| 337 | u32 timers[TCP_N_TIMERS]; /**< Timer handles into timer wheel */ |
| 338 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 339 | u64 segs_in; /** RFC4022/4898 tcpHCInSegs/tcpEStatsPerfSegsIn */ |
| 340 | u64 bytes_in; /** RFC4898 tcpEStatsPerfHCDataOctetsIn */ |
| 341 | u64 segs_out; /** RFC4898 tcpEStatsPerfSegsOut */ |
| 342 | u64 bytes_out; /** RFC4898 tcpEStatsPerfHCDataOctetsOut */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 343 | |
| 344 | /** Send sequence variables RFC793 */ |
| 345 | u32 snd_una; /**< oldest unacknowledged sequence number */ |
| 346 | u32 snd_una_max; /**< newest unacknowledged sequence number + 1*/ |
| 347 | u32 snd_wnd; /**< send window */ |
| 348 | u32 snd_wl1; /**< seq number used for last snd.wnd update */ |
| 349 | u32 snd_wl2; /**< ack number used for last snd.wnd update */ |
| 350 | u32 snd_nxt; /**< next seq number to be sent */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 351 | u16 snd_mss; /**< Effective send max seg (data) size */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 352 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 353 | u64 data_segs_in; /** RFC4898 tcpEStatsPerfDataSegsIn */ |
| 354 | u64 data_segs_out; /** RFC4898 tcpEStatsPerfDataSegsOut */ |
| 355 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 356 | /** Receive sequence variables RFC793 */ |
| 357 | u32 rcv_nxt; /**< next sequence number expected */ |
| 358 | u32 rcv_wnd; /**< receive window we expect */ |
| 359 | |
| 360 | u32 rcv_las; /**< rcv_nxt at last ack sent/rcv_wnd update */ |
| 361 | u32 iss; /**< initial sent sequence */ |
| 362 | u32 irs; /**< initial remote sequence */ |
| 363 | |
| 364 | /* Options */ |
Florin Coras | c834341 | 2017-05-04 14:25:50 -0700 | [diff] [blame] | 365 | u8 snd_opts_len; /**< Tx options len */ |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 366 | u8 rcv_wscale; /**< Window scale to advertise to peer */ |
| 367 | u8 snd_wscale; /**< Window scale to use when sending */ |
| 368 | u32 tsval_recent; /**< Last timestamp received */ |
| 369 | u32 tsval_recent_age; /**< When last updated tstamp_recent*/ |
| 370 | tcp_options_t snd_opts; /**< Tx options for connection */ |
| 371 | tcp_options_t rcv_opts; /**< Rx options for connection */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 372 | |
| 373 | sack_block_t *snd_sacks; /**< Vector of SACKs to send. XXX Fixed size? */ |
Florin Coras | e5b1791 | 2019-02-21 16:46:24 -0800 | [diff] [blame] | 374 | u8 snd_sack_pos; /**< Position in vec of first block to send */ |
Florin Coras | b691f76 | 2019-02-22 09:07:20 -0800 | [diff] [blame] | 375 | sack_block_t *snd_sacks_fl; /**< Vector for building new list */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 376 | sack_scoreboard_t sack_sb; /**< SACK "scoreboard" that tracks holes */ |
| 377 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 378 | u16 rcv_dupacks; /**< Number of recent DUPACKs received */ |
| 379 | u32 dupacks_in; /**< RFC4898 tcpEStatsStackDupAcksIn*/ |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 380 | u8 pending_dupacks; /**< Number of DUPACKs to be sent */ |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 381 | u32 dupacks_out; /**< RFC4898 tcpEStatsPathDupAcksOut */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 382 | |
| 383 | /* Congestion control */ |
| 384 | u32 cwnd; /**< Congestion window */ |
Florin Coras | 6216600 | 2018-04-18 16:40:55 -0700 | [diff] [blame] | 385 | u32 cwnd_acc_bytes; /**< Bytes accumulated for cwnd increment */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 386 | u32 ssthresh; /**< Slow-start threshold */ |
| 387 | u32 prev_ssthresh; /**< ssthresh before congestion */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 388 | u32 prev_cwnd; /**< ssthresh before congestion */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 389 | u32 bytes_acked; /**< Bytes acknowledged by current segment */ |
Florin Coras | 9ece3c0 | 2018-11-05 11:06:53 -0800 | [diff] [blame] | 390 | u32 burst_acked; /**< Bytes acknowledged in current burst */ |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 391 | u32 snd_rxt_bytes; /**< Retransmitted bytes during current cc event */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 392 | u32 snd_rxt_ts; /**< Timestamp when first packet is retransmitted */ |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 393 | u32 prr_delivered; /**< RFC6937 bytes delivered during current event */ |
Florin Coras | be237bf | 2019-09-27 08:16:40 -0700 | [diff] [blame] | 394 | u32 prr_start; /**< snd_una when prr starts */ |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 395 | u32 rxt_delivered; /**< Rxt bytes delivered during current cc event */ |
Florin Coras | be237bf | 2019-09-27 08:16:40 -0700 | [diff] [blame] | 396 | u32 rxt_head; /**< snd_una last time we re rxted the head */ |
Florin Coras | c31dc31 | 2019-10-06 14:06:14 -0700 | [diff] [blame] | 397 | u32 prev_dsegs_out; /**< Number of dsegs after last ack */ |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 398 | u32 tsecr_last_ack; /**< Timestamp echoed to us in last healthy ACK */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 399 | u32 snd_congestion; /**< snd_una_max when congestion is detected */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 400 | u32 tx_fifo_size; /**< Tx fifo size. Used to constrain cwnd */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 401 | tcp_cc_algorithm_t *cc_algo; /**< Congestion control algorithm */ |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 402 | u8 cc_data[TCP_CC_DATA_SZ]; /**< Congestion control algo private data */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 403 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 404 | u32 fr_occurences; /**< fast-retransmit occurrences RFC4898 |
| 405 | tcpEStatsStackFastRetran */ |
| 406 | u32 tr_occurences; /**< timer-retransmit occurrences */ |
| 407 | u64 bytes_retrans; /**< RFC4898 tcpEStatsPerfOctetsRetrans */ |
| 408 | u64 segs_retrans; /**< RFC4898 tcpEStatsPerfSegsRetrans*/ |
| 409 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 410 | /* RTT and RTO */ |
| 411 | u32 rto; /**< Retransmission timeout */ |
| 412 | u32 rto_boff; /**< Index for RTO backoff */ |
| 413 | u32 srtt; /**< Smoothed RTT */ |
| 414 | u32 rttvar; /**< Smoothed mean RTT difference. Approximates variance */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 415 | u32 rtt_seq; /**< Sequence number for tracked ACK */ |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 416 | f64 rtt_ts; /**< Timestamp for tracked ACK */ |
| 417 | f64 mrtt_us; /**< High precision mrtt from tracked acks */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 418 | |
Florin Coras | 42ceddb | 2018-12-12 10:56:01 -0800 | [diff] [blame] | 419 | u32 psh_seq; /**< Add psh header for seg that includes this */ |
Florin Coras | 07beade | 2019-06-20 12:18:31 -0700 | [diff] [blame] | 420 | u32 next_node_index; /**< Can be used to control next node in output */ |
| 421 | u32 next_node_opaque; /**< Opaque to pass to next node */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 422 | u32 limited_transmit; /**< snd_nxt when limited transmit starts */ |
| 423 | u32 sw_if_index; /**< Interface for the connection */ |
| 424 | |
| 425 | /* Delivery rate estimation */ |
| 426 | u64 delivered; /**< Total bytes delivered to peer */ |
| 427 | u64 app_limited; /**< Delivered when app-limited detected */ |
| 428 | f64 delivered_time; /**< Time last bytes were acked */ |
Florin Coras | 7436b43 | 2019-09-10 23:26:27 -0700 | [diff] [blame] | 429 | f64 first_tx_time; /**< Send time for recently delivered/sent */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 430 | tcp_byte_tracker_t *bt; /**< Tx byte tracker */ |
| 431 | |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 432 | tcp_errors_t errors; /**< Soft connection errors */ |
| 433 | |
| 434 | f64 start_ts; /**< Timestamp when connection initialized */ |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 435 | u32 last_fib_check; /**< Last time we checked fib route for peer */ |
| 436 | u16 mss; /**< Our max seg size that includes options */ |
Florin Coras | edfe0ee | 2019-07-29 18:13:25 -0700 | [diff] [blame] | 437 | u32 timestamp_delta; /**< Offset for timestamp */ |
Tarun Gupta | 2089c69 | 2019-11-04 16:35:59 -0800 | [diff] [blame] | 438 | u32 ipv6_flow_label; /**< flow label for ipv6 header */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 439 | } tcp_connection_t; |
| 440 | |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 441 | /* *INDENT-OFF* */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 442 | struct _tcp_cc_algorithm |
| 443 | { |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 444 | const char *name; |
| 445 | uword (*unformat_cfg) (unformat_input_t * input); |
Florin Coras | a3c3265 | 2019-07-03 17:47:22 -0700 | [diff] [blame] | 446 | void (*init) (tcp_connection_t * tc); |
| 447 | void (*cleanup) (tcp_connection_t * tc); |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 448 | void (*rcv_ack) (tcp_connection_t * tc, tcp_rate_sample_t *rs); |
| 449 | void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack, |
| 450 | tcp_rate_sample_t *rs); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 451 | void (*congestion) (tcp_connection_t * tc); |
Florin Coras | a3c3265 | 2019-07-03 17:47:22 -0700 | [diff] [blame] | 452 | void (*loss) (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 453 | void (*recovered) (tcp_connection_t * tc); |
Florin Coras | eff6b82 | 2019-07-03 19:51:02 -0700 | [diff] [blame] | 454 | void (*undo_recovery) (tcp_connection_t * tc); |
Florin Coras | ca2831a | 2019-07-04 17:05:59 -0700 | [diff] [blame] | 455 | void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt); |
Florin Coras | d206724 | 2019-08-16 10:33:49 -0700 | [diff] [blame] | 456 | u64 (*get_pacing_rate) (tcp_connection_t *tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 457 | }; |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 458 | /* *INDENT-ON* */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 459 | |
| 460 | #define tcp_fastrecovery_on(tc) (tc)->flags |= TCP_CONN_FAST_RECOVERY |
| 461 | #define tcp_fastrecovery_off(tc) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 462 | #define tcp_recovery_on(tc) (tc)->flags |= TCP_CONN_RECOVERY |
| 463 | #define tcp_recovery_off(tc) (tc)->flags &= ~TCP_CONN_RECOVERY |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 464 | #define tcp_in_fastrecovery(tc) ((tc)->flags & TCP_CONN_FAST_RECOVERY) |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 465 | #define tcp_in_recovery(tc) ((tc)->flags & (TCP_CONN_RECOVERY)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 466 | #define tcp_in_slowstart(tc) (tc->cwnd < tc->ssthresh) |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 467 | #define tcp_disconnect_pending(tc) ((tc)->flags & TCP_CONN_DCNT_PENDING) |
| 468 | #define tcp_disconnect_pending_on(tc) ((tc)->flags |= TCP_CONN_DCNT_PENDING) |
| 469 | #define tcp_disconnect_pending_off(tc) ((tc)->flags &= ~TCP_CONN_DCNT_PENDING) |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 470 | #define tcp_fastrecovery_first(tc) ((tc)->flags & TCP_CONN_FRXT_FIRST) |
| 471 | #define tcp_fastrecovery_first_on(tc) ((tc)->flags |= TCP_CONN_FRXT_FIRST) |
| 472 | #define tcp_fastrecovery_first_off(tc) ((tc)->flags &= ~TCP_CONN_FRXT_FIRST) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 473 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 474 | #define tcp_in_cong_recovery(tc) ((tc)->flags & \ |
| 475 | (TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY)) |
| 476 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 477 | #define tcp_csum_offload(tc) (!((tc)->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD)) |
| 478 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 479 | always_inline void |
| 480 | tcp_cong_recovery_off (tcp_connection_t * tc) |
| 481 | { |
| 482 | tc->flags &= ~(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY); |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 483 | tcp_fastrecovery_first_off (tc); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 484 | } |
| 485 | |
Florin Coras | d1ba3d2 | 2019-08-08 09:44:47 -0700 | [diff] [blame] | 486 | #define tcp_zero_rwnd_sent(tc) ((tc)->flags & TCP_CONN_ZERO_RWND_SENT) |
Vladimir Kropylev | 398afbd | 2019-06-25 00:06:52 +0300 | [diff] [blame] | 487 | #define tcp_zero_rwnd_sent_on(tc) (tc)->flags |= TCP_CONN_ZERO_RWND_SENT |
| 488 | #define tcp_zero_rwnd_sent_off(tc) (tc)->flags &= ~TCP_CONN_ZERO_RWND_SENT |
| 489 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 490 | typedef enum _tcp_error |
| 491 | { |
| 492 | #define tcp_error(n,s) TCP_ERROR_##n, |
| 493 | #include <vnet/tcp/tcp_error.def> |
| 494 | #undef tcp_error |
| 495 | TCP_N_ERROR, |
| 496 | } tcp_error_t; |
| 497 | |
| 498 | typedef struct _tcp_lookup_dispatch |
| 499 | { |
| 500 | u8 next, error; |
| 501 | } tcp_lookup_dispatch_t; |
| 502 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 503 | typedef struct tcp_worker_ctx_ |
| 504 | { |
| 505 | CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 506 | /** worker time */ |
| 507 | u32 time_now; |
| 508 | |
| 509 | /** worker timer wheel */ |
| 510 | tw_timer_wheel_16t_2w_512sl_t timer_wheel; |
| 511 | |
| 512 | /** tx buffer free list */ |
| 513 | u32 *tx_buffers; |
| 514 | |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 515 | /** tx frames for ip 4/6 lookup nodes */ |
| 516 | vlib_frame_t *ip_lookup_tx_frames[2]; |
| 517 | |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 518 | /** vector of pending ack dequeues */ |
Florin Coras | 9ece3c0 | 2018-11-05 11:06:53 -0800 | [diff] [blame] | 519 | u32 *pending_deq_acked; |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 520 | |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 521 | /** vector of pending disconnect notifications */ |
| 522 | u32 *pending_disconnects; |
| 523 | |
| 524 | /** convenience pointer to this thread's vlib main */ |
| 525 | vlib_main_t *vm; |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 526 | |
Florin Coras | b26743d | 2018-06-26 09:31:04 -0700 | [diff] [blame] | 527 | CLIB_CACHE_LINE_ALIGN_MARK (cacheline1); |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 528 | |
| 529 | /** cached 'on the wire' options for bursts */ |
| 530 | u8 cached_opts[40]; |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 531 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 532 | } tcp_worker_ctx_t; |
| 533 | |
Florin Coras | 18e0d4f | 2019-01-02 12:22:02 -0800 | [diff] [blame] | 534 | typedef struct tcp_iss_seed_ |
| 535 | { |
| 536 | u64 first; |
| 537 | u64 second; |
| 538 | } tcp_iss_seed_t; |
| 539 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 540 | typedef struct tcp_configuration_ |
| 541 | { |
| 542 | /** Max rx fifo size for a session (in bytes). It is used in to compute the |
| 543 | * rfc 7323 window scaling factor */ |
| 544 | u32 max_rx_fifo; |
| 545 | |
| 546 | /** Min rx fifo for a session (in bytes) */ |
| 547 | u32 min_rx_fifo; |
| 548 | |
| 549 | /** Default MTU to be used when establishing connections */ |
| 550 | u16 default_mtu; |
| 551 | |
| 552 | /** Initial CWND multiplier, which multiplies MSS to determine initial CWND. |
| 553 | * Set 0 to determine the initial CWND by another way */ |
| 554 | u16 initial_cwnd_multiplier; |
| 555 | |
| 556 | /** Enable tx pacing for new connections */ |
| 557 | u8 enable_tx_pacing; |
| 558 | |
Florin Coras | bbcfaac | 2019-10-10 13:52:04 -0700 | [diff] [blame] | 559 | /** Allow use of TSO whenever available */ |
| 560 | u8 allow_tso; |
| 561 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 562 | /** Default congestion control algorithm type */ |
| 563 | tcp_cc_algorithm_type_e cc_algo; |
| 564 | |
Florin Coras | 017dc45 | 2019-08-30 11:06:35 -0700 | [diff] [blame] | 565 | /** Min rwnd, as number of snd_mss segments, for update ack to be sent after |
| 566 | * a zero rwnd advertisement */ |
| 567 | u32 rwnd_min_update_ack; |
| 568 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 569 | /** Delayed ack time (disabled) */ |
| 570 | u16 delack_time; |
| 571 | |
| 572 | /** Timer ticks to wait for close from app */ |
| 573 | u16 closewait_time; |
| 574 | |
| 575 | /** Timer ticks to wait in time-wait. Also known as 2MSL */ |
| 576 | u16 timewait_time; |
| 577 | |
| 578 | /** Timer ticks to wait in fin-wait1 to send fin and rcv fin-ack */ |
| 579 | u16 finwait1_time; |
| 580 | |
| 581 | /** Timer ticks to wait in last ack for ack */ |
| 582 | u16 lastack_time; |
| 583 | |
| 584 | /** Timer ticks to wait in fin-wait2 for fin */ |
| 585 | u16 finwait2_time; |
| 586 | |
| 587 | /** Timer ticks to wait in closing for fin ack */ |
| 588 | u16 closing_time; |
| 589 | |
| 590 | /** Timer ticks to wait before cleaning up the connection */ |
| 591 | u16 cleanup_time; |
| 592 | |
| 593 | /** Number of preallocated connections */ |
| 594 | u32 preallocated_connections; |
| 595 | |
| 596 | /** Number of preallocated half-open connections */ |
| 597 | u32 preallocated_half_open_connections; |
| 598 | |
| 599 | /** Vectors of src addresses. Optional unless one needs > 63K active-opens */ |
| 600 | ip4_address_t *ip4_src_addrs; |
| 601 | ip6_address_t *ip6_src_addrs; |
| 602 | |
| 603 | /** Fault-injection. Debug only */ |
| 604 | f64 buffer_fail_fraction; |
| 605 | } tcp_configuration_t; |
| 606 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 607 | typedef struct _tcp_main |
| 608 | { |
| 609 | /* Per-worker thread tcp connection pools */ |
| 610 | tcp_connection_t **connections; |
| 611 | |
| 612 | /* Pool of listeners. */ |
| 613 | tcp_connection_t *listener_pool; |
| 614 | |
| 615 | /** Dispatch table by state and flags */ |
| 616 | tcp_lookup_dispatch_t dispatch_table[TCP_N_STATES][64]; |
| 617 | |
| 618 | u8 log2_tstamp_clocks_per_tick; |
| 619 | f64 tstamp_ticks_per_clock; |
| 620 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 621 | /** per-worker context */ |
| 622 | tcp_worker_ctx_t *wrk_ctx; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 623 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 624 | /** Pool of half-open connections on which we've sent a SYN */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 625 | tcp_connection_t *half_open_connections; |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 626 | clib_spinlock_t half_open_lock; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 627 | |
Florin Coras | ca03186 | 2018-09-24 13:58:05 -0700 | [diff] [blame] | 628 | /** vlib buffer size */ |
| 629 | u32 bytes_per_buffer; |
| 630 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 631 | /** Seed used to generate random iss */ |
Florin Coras | 18e0d4f | 2019-01-02 12:22:02 -0800 | [diff] [blame] | 632 | tcp_iss_seed_t iss_seed; |
| 633 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 634 | /** Congestion control algorithms registered */ |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 635 | tcp_cc_algorithm_t *cc_algos; |
| 636 | |
Florin Coras | fbf278a | 2019-03-26 14:05:38 -0700 | [diff] [blame] | 637 | /** Hash table of cc algorithms by name */ |
| 638 | uword *cc_algo_by_name; |
| 639 | |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 640 | /** Last cc algo registered */ |
| 641 | tcp_cc_algorithm_type_e cc_last_type; |
| 642 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 643 | /** Flag that indicates if stack is on or off */ |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 644 | u8 is_enabled; |
| 645 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 646 | /** Flag that indicates if v4 punting is enabled */ |
Pierre Pfister | 7fe51f3 | 2017-09-20 08:48:36 +0200 | [diff] [blame] | 647 | u8 punt_unknown4; |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 648 | |
| 649 | /** Flag that indicates if v6 punting is enabled */ |
Pierre Pfister | 7fe51f3 | 2017-09-20 08:48:36 +0200 | [diff] [blame] | 650 | u8 punt_unknown6; |
Florin Coras | f988e69 | 2017-11-27 04:34:14 -0500 | [diff] [blame] | 651 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 652 | /** Rotor for v4 source addresses */ |
| 653 | u32 last_v4_addr_rotor; |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 654 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 655 | /** Rotor for v6 source addresses */ |
| 656 | u32 last_v6_addr_rotor; |
| 657 | |
| 658 | /** Protocol configuration */ |
| 659 | tcp_configuration_t cfg; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 660 | } tcp_main_t; |
| 661 | |
| 662 | extern tcp_main_t tcp_main; |
| 663 | extern vlib_node_registration_t tcp4_input_node; |
| 664 | extern vlib_node_registration_t tcp6_input_node; |
| 665 | extern vlib_node_registration_t tcp4_output_node; |
| 666 | extern vlib_node_registration_t tcp6_output_node; |
Filip Tehlar | e275bed | 2019-03-06 00:06:56 -0800 | [diff] [blame] | 667 | extern vlib_node_registration_t tcp4_established_node; |
| 668 | extern vlib_node_registration_t tcp6_established_node; |
| 669 | extern vlib_node_registration_t tcp4_syn_sent_node; |
| 670 | extern vlib_node_registration_t tcp6_syn_sent_node; |
| 671 | extern vlib_node_registration_t tcp4_rcv_process_node; |
| 672 | extern vlib_node_registration_t tcp6_rcv_process_node; |
| 673 | extern vlib_node_registration_t tcp4_listen_node; |
| 674 | extern vlib_node_registration_t tcp6_listen_node; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 675 | |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 676 | #define tcp_cfg tcp_main.cfg |
Florin Coras | 1f42101 | 2019-07-26 10:18:51 -0700 | [diff] [blame] | 677 | #define tcp_node_index(node_id, is_ip4) \ |
| 678 | ((is_ip4) ? tcp4_##node_id##_node.index : tcp6_##node_id##_node.index) |
| 679 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 680 | always_inline tcp_main_t * |
| 681 | vnet_get_tcp_main () |
| 682 | { |
| 683 | return &tcp_main; |
| 684 | } |
| 685 | |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 686 | always_inline tcp_worker_ctx_t * |
| 687 | tcp_get_worker (u32 thread_index) |
| 688 | { |
| 689 | return &tcp_main.wrk_ctx[thread_index]; |
| 690 | } |
| 691 | |
Florin Coras | 82b13a8 | 2017-04-25 11:58:06 -0700 | [diff] [blame] | 692 | always_inline tcp_header_t * |
| 693 | tcp_buffer_hdr (vlib_buffer_t * b) |
| 694 | { |
| 695 | ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE); |
| 696 | return (tcp_header_t *) (b->data + b->current_data |
| 697 | + vnet_buffer (b)->tcp.hdr_offset); |
| 698 | } |
| 699 | |
Florin Coras | f988e69 | 2017-11-27 04:34:14 -0500 | [diff] [blame] | 700 | #if (VLIB_BUFFER_TRACE_TRAJECTORY) |
| 701 | #define tcp_trajectory_add_start(b, start) \ |
| 702 | { \ |
| 703 | (*vlib_buffer_trace_trajectory_cb) (b, start); \ |
| 704 | } |
| 705 | #else |
| 706 | #define tcp_trajectory_add_start(b, start) |
| 707 | #endif |
| 708 | |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 709 | clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en); |
| 710 | |
Pierre Pfister | 7fe51f3 | 2017-09-20 08:48:36 +0200 | [diff] [blame] | 711 | void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add); |
| 712 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 713 | always_inline tcp_connection_t * |
| 714 | tcp_connection_get (u32 conn_index, u32 thread_index) |
| 715 | { |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 716 | if (PREDICT_FALSE |
| 717 | (pool_is_free_index (tcp_main.connections[thread_index], conn_index))) |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 718 | return 0; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 719 | return pool_elt_at_index (tcp_main.connections[thread_index], conn_index); |
| 720 | } |
| 721 | |
| 722 | always_inline tcp_connection_t * |
| 723 | tcp_connection_get_if_valid (u32 conn_index, u32 thread_index) |
| 724 | { |
| 725 | if (tcp_main.connections[thread_index] == 0) |
| 726 | return 0; |
| 727 | if (pool_is_free_index (tcp_main.connections[thread_index], conn_index)) |
| 728 | return 0; |
| 729 | return pool_elt_at_index (tcp_main.connections[thread_index], conn_index); |
| 730 | } |
| 731 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 732 | always_inline tcp_connection_t * |
| 733 | tcp_get_connection_from_transport (transport_connection_t * tconn) |
| 734 | { |
| 735 | return (tcp_connection_t *) tconn; |
| 736 | } |
| 737 | |
Florin Coras | 54ddf43 | 2018-12-21 13:54:09 -0800 | [diff] [blame] | 738 | always_inline void |
| 739 | tcp_connection_set_state (tcp_connection_t * tc, tcp_state_t state) |
| 740 | { |
| 741 | tc->state = state; |
Florin Coras | a436a42 | 2019-08-20 07:09:31 -0700 | [diff] [blame] | 742 | TCP_EVT (TCP_EVT_STATE_CHANGE, tc); |
Florin Coras | 54ddf43 | 2018-12-21 13:54:09 -0800 | [diff] [blame] | 743 | } |
| 744 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 745 | void tcp_connection_close (tcp_connection_t * tc); |
| 746 | void tcp_connection_cleanup (tcp_connection_t * tc); |
| 747 | void tcp_connection_del (tcp_connection_t * tc); |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 748 | int tcp_half_open_connection_cleanup (tcp_connection_t * tc); |
Florin Coras | 8124cb7 | 2018-12-16 20:57:29 -0800 | [diff] [blame] | 749 | tcp_connection_t *tcp_connection_alloc (u8 thread_index); |
Florin Coras | 12f6936 | 2019-08-16 09:44:00 -0700 | [diff] [blame] | 750 | tcp_connection_t *tcp_connection_alloc_w_base (u8 thread_index, |
| 751 | tcp_connection_t * base); |
Florin Coras | 8124cb7 | 2018-12-16 20:57:29 -0800 | [diff] [blame] | 752 | void tcp_connection_free (tcp_connection_t * tc); |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 753 | void tcp_connection_reset (tcp_connection_t * tc); |
Dave Barach | 3bbcfab | 2017-08-15 19:03:44 -0400 | [diff] [blame] | 754 | int tcp_configure_v4_source_address_range (vlib_main_t * vm, |
| 755 | ip4_address_t * start, |
| 756 | ip4_address_t * end, u32 table_id); |
| 757 | int tcp_configure_v6_source_address_range (vlib_main_t * vm, |
| 758 | ip6_address_t * start, |
| 759 | ip6_address_t * end, u32 table_id); |
| 760 | void tcp_api_reference (void); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 761 | u8 *format_tcp_connection (u8 * s, va_list * args); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 762 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 763 | always_inline tcp_connection_t * |
| 764 | tcp_listener_get (u32 tli) |
| 765 | { |
| 766 | return pool_elt_at_index (tcp_main.listener_pool, tli); |
| 767 | } |
| 768 | |
| 769 | always_inline tcp_connection_t * |
| 770 | tcp_half_open_connection_get (u32 conn_index) |
| 771 | { |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 772 | tcp_connection_t *tc = 0; |
| 773 | clib_spinlock_lock_if_init (&tcp_main.half_open_lock); |
| 774 | if (!pool_is_free_index (tcp_main.half_open_connections, conn_index)) |
| 775 | tc = pool_elt_at_index (tcp_main.half_open_connections, conn_index); |
| 776 | clib_spinlock_unlock_if_init (&tcp_main.half_open_lock); |
| 777 | return tc; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 778 | } |
| 779 | |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 780 | void tcp_make_fin (tcp_connection_t * tc, vlib_buffer_t * b); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 781 | void tcp_make_synack (tcp_connection_t * ts, vlib_buffer_t * b); |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 782 | void tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt, |
Florin Coras | d4c49be | 2019-02-07 00:15:53 -0800 | [diff] [blame] | 783 | u32 thread_index, u8 is_ip4); |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 784 | void tcp_send_reset (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 785 | void tcp_send_syn (tcp_connection_t * tc); |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 786 | void tcp_send_synack (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 787 | void tcp_send_fin (tcp_connection_t * tc); |
Florin Coras | cb711a4 | 2019-10-16 19:28:17 -0700 | [diff] [blame] | 788 | void tcp_send_ack (tcp_connection_t * tc); |
Florin Coras | b26743d | 2018-06-26 09:31:04 -0700 | [diff] [blame] | 789 | void tcp_update_burst_snd_vars (tcp_connection_t * tc); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 790 | void tcp_update_rto (tcp_connection_t * tc); |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 791 | void tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk); |
Vladimir Kropylev | 398afbd | 2019-06-25 00:06:52 +0300 | [diff] [blame] | 792 | void tcp_send_window_update_ack (tcp_connection_t * tc); |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 793 | |
Florin Coras | 26dd6de | 2019-07-23 23:54:47 -0700 | [diff] [blame] | 794 | void tcp_program_ack (tcp_connection_t * tc); |
| 795 | void tcp_program_dupack (tcp_connection_t * tc); |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 796 | void tcp_program_retransmit (tcp_connection_t * tc); |
Florin Coras | 26dd6de | 2019-07-23 23:54:47 -0700 | [diff] [blame] | 797 | |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 798 | /* |
| 799 | * Rate estimation |
| 800 | */ |
| 801 | |
| 802 | /** |
| 803 | * Byte tracker initialize |
| 804 | * |
| 805 | * @param tc connection for which the byte tracker should be allocated and |
| 806 | * initialized |
| 807 | */ |
| 808 | void tcp_bt_init (tcp_connection_t * tc); |
| 809 | /** |
| 810 | * Byte tracker cleanup |
| 811 | * |
| 812 | * @param tc connection for which the byte tracker should be cleaned up |
| 813 | */ |
| 814 | void tcp_bt_cleanup (tcp_connection_t * tc); |
| 815 | /** |
| 816 | * Flush byte tracker samples |
| 817 | * |
| 818 | * @param tc tcp connection for which samples should be flushed |
| 819 | */ |
| 820 | void tcp_bt_flush_samples (tcp_connection_t * tc); |
| 821 | /** |
| 822 | * Track a tcp tx burst |
| 823 | * |
| 824 | * @param tc tcp connection |
| 825 | */ |
Florin Coras | d6ae4bf | 2019-10-12 18:10:20 -0700 | [diff] [blame] | 826 | void tcp_bt_track_tx (tcp_connection_t * tc, u32 len); |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 827 | /** |
| 828 | * Track a tcp retransmission |
| 829 | * |
| 830 | * @param tc tcp connection |
| 831 | * @param start start sequence number |
| 832 | * @param end end sequence number |
| 833 | */ |
| 834 | void tcp_bt_track_rxt (tcp_connection_t * tc, u32 start, u32 end); |
| 835 | /** |
| 836 | * Generate a delivery rate sample from recently acked bytes |
| 837 | * |
| 838 | * @param tc tcp connection |
| 839 | * @param rs resulting rate sample |
| 840 | */ |
| 841 | void tcp_bt_sample_delivery_rate (tcp_connection_t * tc, |
| 842 | tcp_rate_sample_t * rs); |
| 843 | /** |
| 844 | * Check if sample to be generated is app limited |
| 845 | * |
| 846 | * @param tc tcp connection |
| 847 | */ |
| 848 | void tcp_bt_check_app_limited (tcp_connection_t * tc); |
| 849 | /** |
| 850 | * Check if the byte tracker is in sane state |
| 851 | * |
| 852 | * Should be used only for testing |
| 853 | * |
| 854 | * @param bt byte tracker |
| 855 | */ |
| 856 | int tcp_bt_is_sane (tcp_byte_tracker_t * bt); |
Florin Coras | d6ae4bf | 2019-10-12 18:10:20 -0700 | [diff] [blame] | 857 | u8 *format_tcp_bt (u8 * s, va_list * args); |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 858 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 859 | always_inline u32 |
| 860 | tcp_end_seq (tcp_header_t * th, u32 len) |
| 861 | { |
| 862 | return th->seq_number + tcp_is_syn (th) + tcp_is_fin (th) + len; |
| 863 | } |
| 864 | |
| 865 | /* Modulo arithmetic for TCP sequence numbers */ |
| 866 | #define seq_lt(_s1, _s2) ((i32)((_s1)-(_s2)) < 0) |
| 867 | #define seq_leq(_s1, _s2) ((i32)((_s1)-(_s2)) <= 0) |
| 868 | #define seq_gt(_s1, _s2) ((i32)((_s1)-(_s2)) > 0) |
| 869 | #define seq_geq(_s1, _s2) ((i32)((_s1)-(_s2)) >= 0) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 870 | #define seq_max(_s1, _s2) (seq_gt((_s1), (_s2)) ? (_s1) : (_s2)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 871 | |
| 872 | /* Modulo arithmetic for timestamps */ |
| 873 | #define timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0) |
| 874 | #define timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0) |
| 875 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 876 | /** |
| 877 | * Our estimate of the number of bytes that have left the network |
| 878 | */ |
| 879 | always_inline u32 |
| 880 | tcp_bytes_out (const tcp_connection_t * tc) |
| 881 | { |
| 882 | if (tcp_opts_sack_permitted (&tc->rcv_opts)) |
| 883 | return tc->sack_sb.sacked_bytes + tc->sack_sb.lost_bytes; |
| 884 | else |
Florin Coras | bf1f8b7 | 2019-11-04 14:39:33 -0800 | [diff] [blame] | 885 | return clib_min (tc->rcv_dupacks * tc->snd_mss, |
| 886 | tc->snd_nxt - tc->snd_una); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | /** |
| 890 | * Our estimate of the number of bytes in flight (pipe size) |
| 891 | */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 892 | always_inline u32 |
| 893 | tcp_flight_size (const tcp_connection_t * tc) |
| 894 | { |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 895 | int flight_size; |
| 896 | |
Florin Coras | 4759683 | 2019-03-12 18:58:54 -0700 | [diff] [blame] | 897 | flight_size = (int) (tc->snd_nxt - tc->snd_una) - tcp_bytes_out (tc) |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 898 | + tc->snd_rxt_bytes - tc->rxt_delivered; |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 899 | |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 900 | ASSERT (flight_size >= 0); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 901 | |
| 902 | return flight_size; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | /** |
| 906 | * Initial cwnd as per RFC5681 |
| 907 | */ |
| 908 | always_inline u32 |
| 909 | tcp_initial_cwnd (const tcp_connection_t * tc) |
| 910 | { |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 911 | if (tcp_cfg.initial_cwnd_multiplier > 0) |
| 912 | return tcp_cfg.initial_cwnd_multiplier * tc->snd_mss; |
Vladimir Kropylev | 4f731f8 | 2019-06-26 12:56:21 +0300 | [diff] [blame] | 913 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 914 | if (tc->snd_mss > 2190) |
| 915 | return 2 * tc->snd_mss; |
| 916 | else if (tc->snd_mss > 1095) |
| 917 | return 3 * tc->snd_mss; |
| 918 | else |
| 919 | return 4 * tc->snd_mss; |
| 920 | } |
| 921 | |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 922 | /* |
| 923 | * Accumulate acked bytes for cwnd increase |
| 924 | * |
| 925 | * Once threshold bytes are accumulated, snd_mss bytes are added |
| 926 | * to the cwnd. |
| 927 | */ |
| 928 | always_inline void |
| 929 | tcp_cwnd_accumulate (tcp_connection_t * tc, u32 thresh, u32 bytes) |
| 930 | { |
| 931 | tc->cwnd_acc_bytes += bytes; |
| 932 | if (tc->cwnd_acc_bytes >= thresh) |
| 933 | { |
| 934 | u32 inc = tc->cwnd_acc_bytes / thresh; |
| 935 | tc->cwnd_acc_bytes -= inc * thresh; |
| 936 | tc->cwnd += inc * tc->snd_mss; |
| 937 | tc->cwnd = clib_min (tc->cwnd, tc->tx_fifo_size); |
| 938 | } |
| 939 | } |
| 940 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 941 | always_inline u32 |
| 942 | tcp_loss_wnd (const tcp_connection_t * tc) |
| 943 | { |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 944 | /* Whatever we have in flight + the packet we're about to send */ |
| 945 | return tcp_flight_size (tc) + tc->snd_mss; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 946 | } |
| 947 | |
| 948 | always_inline u32 |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 949 | tcp_available_snd_wnd (const tcp_connection_t * tc) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 950 | { |
| 951 | return clib_min (tc->cwnd, tc->snd_wnd); |
| 952 | } |
| 953 | |
| 954 | always_inline u32 |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 955 | tcp_available_output_snd_space (const tcp_connection_t * tc) |
| 956 | { |
| 957 | u32 available_wnd = tcp_available_snd_wnd (tc); |
| 958 | int flight_size = (int) (tc->snd_nxt - tc->snd_una); |
| 959 | |
| 960 | if (available_wnd <= flight_size) |
| 961 | return 0; |
| 962 | |
| 963 | return available_wnd - flight_size; |
| 964 | } |
| 965 | |
| 966 | /** |
| 967 | * Estimate of how many bytes we can still push into the network |
| 968 | */ |
| 969 | always_inline u32 |
Florin Coras | ca1c8f3 | 2018-05-23 21:01:30 -0700 | [diff] [blame] | 970 | tcp_available_cc_snd_space (const tcp_connection_t * tc) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 971 | { |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 972 | u32 available_wnd = tcp_available_snd_wnd (tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 973 | u32 flight_size = tcp_flight_size (tc); |
| 974 | |
| 975 | if (available_wnd <= flight_size) |
| 976 | return 0; |
| 977 | |
| 978 | return available_wnd - flight_size; |
| 979 | } |
| 980 | |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 981 | always_inline u8 |
| 982 | tcp_is_lost_fin (tcp_connection_t * tc) |
| 983 | { |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 984 | if ((tc->flags & TCP_CONN_FINSNT) && (tc->snd_una_max - tc->snd_una == 1)) |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 985 | return 1; |
| 986 | return 0; |
| 987 | } |
| 988 | |
Florin Coras | 45ca73f | 2018-09-27 09:19:29 -0700 | [diff] [blame] | 989 | u32 tcp_snd_space (tcp_connection_t * tc); |
Florin Coras | be237bf | 2019-09-27 08:16:40 -0700 | [diff] [blame] | 990 | int tcp_fastrecovery_prr_snd_space (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 991 | |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 992 | fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc); |
| 993 | |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 994 | /* Made public for unit testing only */ |
| 995 | void tcp_update_sack_list (tcp_connection_t * tc, u32 start, u32 end); |
Florin Coras | ca1c8f3 | 2018-05-23 21:01:30 -0700 | [diff] [blame] | 996 | u32 tcp_sack_list_bytes (tcp_connection_t * tc); |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 997 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 998 | always_inline u32 |
| 999 | tcp_time_now (void) |
| 1000 | { |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 1001 | return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now; |
Florin Coras | 82d3ec8 | 2017-08-14 08:10:42 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1004 | always_inline u32 |
| 1005 | tcp_time_now_w_thread (u32 thread_index) |
| 1006 | { |
| 1007 | return tcp_main.wrk_ctx[thread_index].time_now; |
| 1008 | } |
| 1009 | |
Vladimir Kropylev | 1cfcb78 | 2019-07-02 11:25:26 +0300 | [diff] [blame] | 1010 | /** |
| 1011 | * Generate timestamp for tcp connection |
| 1012 | */ |
| 1013 | always_inline u32 |
| 1014 | tcp_tstamp (tcp_connection_t * tc) |
| 1015 | { |
| 1016 | return (tcp_main.wrk_ctx[tc->c_thread_index].time_now - |
| 1017 | tc->timestamp_delta); |
| 1018 | } |
| 1019 | |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1020 | always_inline f64 |
| 1021 | tcp_time_now_us (u32 thread_index) |
| 1022 | { |
| 1023 | return transport_time_now (thread_index); |
| 1024 | } |
| 1025 | |
Florin Coras | 82d3ec8 | 2017-08-14 08:10:42 -0700 | [diff] [blame] | 1026 | always_inline u32 |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1027 | tcp_set_time_now (tcp_worker_ctx_t * wrk) |
Florin Coras | 82d3ec8 | 2017-08-14 08:10:42 -0700 | [diff] [blame] | 1028 | { |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 1029 | wrk->time_now = clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock; |
| 1030 | return wrk->time_now; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1031 | } |
| 1032 | |
Florin Coras | 14ed6df | 2019-03-06 21:13:42 -0800 | [diff] [blame] | 1033 | u32 tcp_session_push_header (transport_connection_t * tconn, |
| 1034 | vlib_buffer_t * b); |
Florin Coras | 26dd6de | 2019-07-23 23:54:47 -0700 | [diff] [blame] | 1035 | int tcp_session_custom_tx (void *conn, u32 max_burst_size); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1036 | |
| 1037 | void tcp_connection_timers_init (tcp_connection_t * tc); |
| 1038 | void tcp_connection_timers_reset (tcp_connection_t * tc); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 1039 | void tcp_init_snd_vars (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1040 | void tcp_connection_init_vars (tcp_connection_t * tc); |
Florin Coras | c44a558 | 2018-11-01 16:30:54 -0700 | [diff] [blame] | 1041 | void tcp_connection_tx_pacer_update (tcp_connection_t * tc); |
| 1042 | void tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window, |
| 1043 | u32 start_bucket); |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1044 | |
| 1045 | always_inline void |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 1046 | tcp_cc_rcv_ack (tcp_connection_t * tc, tcp_rate_sample_t * rs) |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1047 | { |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 1048 | tc->cc_algo->rcv_ack (tc, rs); |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 1049 | tc->tsecr_last_ack = tc->rcv_opts.tsecr; |
| 1050 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1051 | |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 1052 | static inline void |
| 1053 | tcp_cc_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type, |
| 1054 | tcp_rate_sample_t * rs) |
| 1055 | { |
| 1056 | tc->cc_algo->rcv_cong_ack (tc, ack_type, rs); |
| 1057 | } |
| 1058 | |
Florin Coras | a3c3265 | 2019-07-03 17:47:22 -0700 | [diff] [blame] | 1059 | static inline void |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1060 | tcp_cc_congestion (tcp_connection_t * tc) |
| 1061 | { |
| 1062 | tc->cc_algo->congestion (tc); |
| 1063 | } |
| 1064 | |
| 1065 | static inline void |
Florin Coras | a3c3265 | 2019-07-03 17:47:22 -0700 | [diff] [blame] | 1066 | tcp_cc_loss (tcp_connection_t * tc) |
| 1067 | { |
| 1068 | tc->cc_algo->loss (tc); |
| 1069 | } |
| 1070 | |
Florin Coras | eff6b82 | 2019-07-03 19:51:02 -0700 | [diff] [blame] | 1071 | static inline void |
| 1072 | tcp_cc_recovered (tcp_connection_t * tc) |
| 1073 | { |
| 1074 | tc->cc_algo->recovered (tc); |
| 1075 | } |
| 1076 | |
| 1077 | static inline void |
| 1078 | tcp_cc_undo_recovery (tcp_connection_t * tc) |
| 1079 | { |
| 1080 | if (tc->cc_algo->undo_recovery) |
| 1081 | tc->cc_algo->undo_recovery (tc); |
| 1082 | } |
| 1083 | |
Florin Coras | ca2831a | 2019-07-04 17:05:59 -0700 | [diff] [blame] | 1084 | static inline void |
| 1085 | tcp_cc_event (tcp_connection_t * tc, tcp_cc_event_t evt) |
| 1086 | { |
| 1087 | if (tc->cc_algo->event) |
| 1088 | tc->cc_algo->event (tc, evt); |
| 1089 | } |
| 1090 | |
Florin Coras | d206724 | 2019-08-16 10:33:49 -0700 | [diff] [blame] | 1091 | static inline u64 |
| 1092 | tcp_cc_get_pacing_rate (tcp_connection_t * tc) |
| 1093 | { |
| 1094 | if (tc->cc_algo->get_pacing_rate) |
| 1095 | return tc->cc_algo->get_pacing_rate (tc); |
| 1096 | |
| 1097 | f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us); |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1098 | |
Florin Coras | d206724 | 2019-08-16 10:33:49 -0700 | [diff] [blame] | 1099 | /* TODO should constrain to interface's max throughput but |
| 1100 | * we don't have link speeds for sw ifs ..*/ |
Florin Coras | 36ebcff | 2019-09-12 18:36:44 -0700 | [diff] [blame] | 1101 | return ((f64) tc->cwnd / srtt); |
Florin Coras | d206724 | 2019-08-16 10:33:49 -0700 | [diff] [blame] | 1102 | } |
| 1103 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1104 | always_inline void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1105 | tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval) |
| 1106 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1107 | ASSERT (tc->c_thread_index == vlib_get_thread_index ()); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 1108 | ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID); |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 1109 | tc->timers[timer_id] = |
| 1110 | tw_timer_start_16t_2w_512sl (&tcp_main. |
| 1111 | wrk_ctx[tc->c_thread_index].timer_wheel, |
| 1112 | tc->c_c_index, timer_id, interval); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | always_inline void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1116 | tcp_timer_reset (tcp_connection_t * tc, u8 timer_id) |
| 1117 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1118 | ASSERT (tc->c_thread_index == vlib_get_thread_index ()); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1119 | if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID) |
| 1120 | return; |
| 1121 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 1122 | tw_timer_stop_16t_2w_512sl (&tcp_main. |
| 1123 | wrk_ctx[tc->c_thread_index].timer_wheel, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1124 | tc->timers[timer_id]); |
| 1125 | tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID; |
| 1126 | } |
| 1127 | |
| 1128 | always_inline void |
| 1129 | tcp_timer_update (tcp_connection_t * tc, u8 timer_id, u32 interval) |
| 1130 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1131 | ASSERT (tc->c_thread_index == vlib_get_thread_index ()); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1132 | if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID) |
Florin Coras | adb5bd5 | 2018-06-22 15:29:38 -0700 | [diff] [blame] | 1133 | tw_timer_update_16t_2w_512sl (&tcp_main. |
| 1134 | wrk_ctx[tc->c_thread_index].timer_wheel, |
| 1135 | tc->timers[timer_id], interval); |
| 1136 | else |
| 1137 | tc->timers[timer_id] = |
| 1138 | tw_timer_start_16t_2w_512sl (&tcp_main. |
| 1139 | wrk_ctx[tc->c_thread_index].timer_wheel, |
| 1140 | tc->c_c_index, timer_id, interval); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1141 | } |
| 1142 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1143 | always_inline void |
| 1144 | tcp_retransmit_timer_set (tcp_connection_t * tc) |
| 1145 | { |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 1146 | ASSERT (tc->snd_una != tc->snd_una_max); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1147 | tcp_timer_set (tc, TCP_TIMER_RETRANSMIT, |
| 1148 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
| 1149 | } |
| 1150 | |
| 1151 | always_inline void |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1152 | tcp_retransmit_timer_reset (tcp_connection_t * tc) |
| 1153 | { |
| 1154 | tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT); |
| 1155 | } |
| 1156 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1157 | always_inline void |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 1158 | tcp_retransmit_timer_force_update (tcp_connection_t * tc) |
| 1159 | { |
| 1160 | tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, |
| 1161 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
| 1162 | } |
| 1163 | |
| 1164 | always_inline void |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1165 | tcp_persist_timer_set (tcp_connection_t * tc) |
| 1166 | { |
| 1167 | /* Reuse RTO. It's backed off in handler */ |
| 1168 | tcp_timer_set (tc, TCP_TIMER_PERSIST, |
Florin Coras | 9094b5c | 2019-08-12 14:17:47 -0700 | [diff] [blame] | 1169 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | always_inline void |
| 1173 | tcp_persist_timer_update (tcp_connection_t * tc) |
| 1174 | { |
Florin Coras | b3dce89 | 2019-10-30 09:22:14 -0700 | [diff] [blame] | 1175 | u32 interval; |
| 1176 | |
| 1177 | if (seq_leq (tc->snd_una, tc->snd_congestion + tc->burst_acked)) |
| 1178 | interval = 1; |
| 1179 | else |
| 1180 | interval = clib_max (tc->rto * TCP_TO_TIMER_TICK, 1); |
| 1181 | |
| 1182 | tcp_timer_update (tc, TCP_TIMER_PERSIST, interval); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1183 | } |
| 1184 | |
| 1185 | always_inline void |
| 1186 | tcp_persist_timer_reset (tcp_connection_t * tc) |
| 1187 | { |
| 1188 | tcp_timer_reset (tc, TCP_TIMER_PERSIST); |
| 1189 | } |
| 1190 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 1191 | always_inline void |
| 1192 | tcp_retransmit_timer_update (tcp_connection_t * tc) |
| 1193 | { |
Florin Coras | 4759683 | 2019-03-12 18:58:54 -0700 | [diff] [blame] | 1194 | if (tc->snd_una == tc->snd_nxt) |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 1195 | { |
| 1196 | tcp_retransmit_timer_reset (tc); |
| 1197 | if (tc->snd_wnd < tc->snd_mss) |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 1198 | tcp_persist_timer_update (tc); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 1199 | } |
| 1200 | else |
| 1201 | tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, |
| 1202 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
| 1203 | } |
| 1204 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1205 | always_inline u8 |
| 1206 | tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer) |
| 1207 | { |
| 1208 | return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID; |
| 1209 | } |
| 1210 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 1211 | #define tcp_validate_txf_size(_tc, _a) \ |
| 1212 | ASSERT(_tc->state != TCP_STATE_ESTABLISHED \ |
Florin Coras | 31c9955 | 2019-03-01 13:00:58 -0800 | [diff] [blame] | 1213 | || transport_max_tx_dequeue (&_tc->connection) >= _a) |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 1214 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1215 | void tcp_rcv_sacks (tcp_connection_t * tc, u32 ack); |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1216 | u8 *tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 1217 | |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 1218 | /** |
| 1219 | * Register exiting cc algo type |
| 1220 | */ |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1221 | void tcp_cc_algo_register (tcp_cc_algorithm_type_e type, |
| 1222 | const tcp_cc_algorithm_t * vft); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1223 | |
Florin Coras | 4e116fb | 2019-06-10 08:33:50 -0700 | [diff] [blame] | 1224 | /** |
| 1225 | * Register new cc algo type |
| 1226 | */ |
| 1227 | tcp_cc_algorithm_type_e tcp_cc_algo_new_type (const tcp_cc_algorithm_t * vft); |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 1228 | tcp_cc_algorithm_t *tcp_cc_algo_get (tcp_cc_algorithm_type_e type); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1229 | |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 1230 | static inline void * |
| 1231 | tcp_cc_data (tcp_connection_t * tc) |
| 1232 | { |
| 1233 | return (void *) tc->cc_data; |
| 1234 | } |
| 1235 | |
Florin Coras | 5281473 | 2019-06-12 15:38:19 -0700 | [diff] [blame] | 1236 | void newreno_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type, |
| 1237 | tcp_rate_sample_t * rs); |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 1238 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1239 | /** |
| 1240 | * Push TCP header to buffer |
| 1241 | * |
| 1242 | * @param vm - vlib_main |
| 1243 | * @param b - buffer to write the header to |
| 1244 | * @param sp_net - source port net order |
| 1245 | * @param dp_net - destination port net order |
| 1246 | * @param seq - sequence number net order |
| 1247 | * @param ack - ack number net order |
| 1248 | * @param tcp_hdr_opts_len - header and options length in bytes |
| 1249 | * @param flags - header flags |
| 1250 | * @param wnd - window size |
| 1251 | * |
| 1252 | * @return - pointer to start of TCP header |
| 1253 | */ |
| 1254 | always_inline void * |
| 1255 | vlib_buffer_push_tcp_net_order (vlib_buffer_t * b, u16 sp, u16 dp, u32 seq, |
| 1256 | u32 ack, u8 tcp_hdr_opts_len, u8 flags, |
| 1257 | u16 wnd) |
| 1258 | { |
| 1259 | tcp_header_t *th; |
| 1260 | |
| 1261 | th = vlib_buffer_push_uninit (b, tcp_hdr_opts_len); |
| 1262 | |
| 1263 | th->src_port = sp; |
| 1264 | th->dst_port = dp; |
| 1265 | th->seq_number = seq; |
| 1266 | th->ack_number = ack; |
| 1267 | th->data_offset_and_reserved = (tcp_hdr_opts_len >> 2) << 4; |
| 1268 | th->flags = flags; |
| 1269 | th->window = wnd; |
| 1270 | th->checksum = 0; |
| 1271 | th->urgent_pointer = 0; |
Srikanth A | 02833ff | 2019-10-02 17:48:58 -0700 | [diff] [blame] | 1272 | vnet_buffer (b)->l4_hdr_offset = (u8 *) th - b->data; |
| 1273 | b->flags |= VNET_BUFFER_F_L4_HDR_OFFSET_VALID; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1274 | return th; |
| 1275 | } |
| 1276 | |
| 1277 | /** |
| 1278 | * Push TCP header to buffer |
| 1279 | * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1280 | * @param b - buffer to write the header to |
| 1281 | * @param sp_net - source port net order |
| 1282 | * @param dp_net - destination port net order |
| 1283 | * @param seq - sequence number host order |
| 1284 | * @param ack - ack number host order |
| 1285 | * @param tcp_hdr_opts_len - header and options length in bytes |
| 1286 | * @param flags - header flags |
| 1287 | * @param wnd - window size |
| 1288 | * |
| 1289 | * @return - pointer to start of TCP header |
| 1290 | */ |
| 1291 | always_inline void * |
| 1292 | vlib_buffer_push_tcp (vlib_buffer_t * b, u16 sp_net, u16 dp_net, u32 seq, |
| 1293 | u32 ack, u8 tcp_hdr_opts_len, u8 flags, u16 wnd) |
| 1294 | { |
| 1295 | return vlib_buffer_push_tcp_net_order (b, sp_net, dp_net, |
| 1296 | clib_host_to_net_u32 (seq), |
| 1297 | clib_host_to_net_u32 (ack), |
| 1298 | tcp_hdr_opts_len, flags, |
| 1299 | clib_host_to_net_u16 (wnd)); |
| 1300 | } |
| 1301 | |
| 1302 | #endif /* _vnet_tcp_h_ */ |
| 1303 | |
| 1304 | /* |
| 1305 | * fd.io coding-style-patch-verification: ON |
| 1306 | * |
| 1307 | * Local Variables: |
| 1308 | * eval: (c-set-style "gnu") |
| 1309 | * End: |
| 1310 | */ |