Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 Cisco and/or its affiliates. |
| 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 |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 34 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 35 | #define TCP_DUPACK_THRESHOLD 3 |
Florin Coras | ca03186 | 2018-09-24 13:58:05 -0700 | [diff] [blame] | 36 | #define TCP_MAX_RX_FIFO_SIZE 32 << 20 |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 37 | #define TCP_MIN_RX_FIFO_SIZE 4 << 10 |
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") \ |
| 74 | _(KEEP, "KEEP") \ |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 75 | _(WAITCLOSE, "WAIT CLOSE") \ |
| 76 | _(RETRANSMIT_SYN, "RETRANSMIT SYN") \ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 77 | _(ESTABLISH, "ESTABLISH") |
| 78 | |
| 79 | typedef enum _tcp_timers |
| 80 | { |
| 81 | #define _(sym, str) TCP_TIMER_##sym, |
| 82 | foreach_tcp_timer |
| 83 | #undef _ |
| 84 | TCP_N_TIMERS |
| 85 | } tcp_timers_e; |
| 86 | |
| 87 | typedef void (timer_expiration_handler) (u32 index); |
| 88 | |
| 89 | extern timer_expiration_handler tcp_timer_delack_handler; |
| 90 | extern timer_expiration_handler tcp_timer_retransmit_handler; |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 91 | extern timer_expiration_handler tcp_timer_persist_handler; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 92 | extern timer_expiration_handler tcp_timer_retransmit_syn_handler; |
| 93 | |
| 94 | #define TCP_TIMER_HANDLE_INVALID ((u32) ~0) |
| 95 | |
| 96 | /* Timer delays as multiples of 100ms */ |
| 97 | #define TCP_TO_TIMER_TICK TCP_TICK*10 /* Period for converting from TCP |
| 98 | * ticks to timer units */ |
| 99 | #define TCP_DELACK_TIME 1 /* 0.1s */ |
| 100 | #define TCP_ESTABLISH_TIME 750 /* 75s */ |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 101 | #define TCP_SYN_RCVD_TIME 600 /* 60s */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 102 | #define TCP_2MSL_TIME 300 /* 30s */ |
Florin Coras | 9d06304 | 2017-09-14 03:08:00 -0400 | [diff] [blame] | 103 | #define TCP_CLOSEWAIT_TIME 20 /* 2s */ |
Florin Coras | a096f2d | 2017-09-28 23:49:42 -0400 | [diff] [blame] | 104 | #define TCP_TIMEWAIT_TIME 100 /* 10s */ |
Florin Coras | e96bf63 | 2018-12-18 22:44:27 -0800 | [diff] [blame] | 105 | #define TCP_FINWAIT1_TIME 600 /* 60s */ |
| 106 | #define TCP_CLEANUP_TIME 1 /* 0.1s */ |
Florin Coras | 5921f98 | 2017-04-03 18:00:00 -0700 | [diff] [blame] | 107 | #define TCP_TIMER_PERSIST_MIN 2 /* 0.2s */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 108 | |
| 109 | #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] | 110 | #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] | 111 | #define TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */ |
| 112 | #define TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */ |
| 113 | #define TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */ |
| 114 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 115 | /** TCP connection flags */ |
| 116 | #define foreach_tcp_connection_flag \ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 117 | _(SNDACK, "Send ACK") \ |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 118 | _(FINSNT, "FIN sent") \ |
Florin Coras | a096f2d | 2017-09-28 23:49:42 -0400 | [diff] [blame] | 119 | _(SENT_RCV_WND0, "Sent 0 rcv_wnd") \ |
| 120 | _(RECOVERY, "Recovery") \ |
| 121 | _(FAST_RECOVERY, "Fast Recovery") \ |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 122 | _(DCNT_PENDING, "Disconnect pending") \ |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 123 | _(HALF_OPEN_DONE, "Half-open completed") \ |
Florin Coras | ca1c8f3 | 2018-05-23 21:01:30 -0700 | [diff] [blame] | 124 | _(FINPNDG, "FIN pending") \ |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 125 | _(FRXT_PENDING, "Fast-retransmit pending") \ |
| 126 | _(FRXT_FIRST, "Fast-retransmit first again") \ |
Florin Coras | 9ece3c0 | 2018-11-05 11:06:53 -0800 | [diff] [blame] | 127 | _(DEQ_PENDING, "Pending dequeue acked") \ |
Florin Coras | e96bf63 | 2018-12-18 22:44:27 -0800 | [diff] [blame] | 128 | _(PSH_PENDING, "PSH pending") \ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 129 | |
| 130 | typedef enum _tcp_connection_flag_bits |
| 131 | { |
| 132 | #define _(sym, str) TCP_CONN_##sym##_BIT, |
| 133 | foreach_tcp_connection_flag |
| 134 | #undef _ |
| 135 | TCP_CONN_N_FLAG_BITS |
| 136 | } tcp_connection_flag_bits_e; |
| 137 | |
| 138 | typedef enum _tcp_connection_flag |
| 139 | { |
| 140 | #define _(sym, str) TCP_CONN_##sym = 1 << TCP_CONN_##sym##_BIT, |
| 141 | foreach_tcp_connection_flag |
| 142 | #undef _ |
| 143 | TCP_CONN_N_FLAGS |
| 144 | } tcp_connection_flags_e; |
| 145 | |
| 146 | /** TCP buffer flags */ |
| 147 | #define foreach_tcp_buf_flag \ |
| 148 | _ (ACK) /**< Sending ACK. */ \ |
| 149 | _ (DUPACK) /**< Sending DUPACK. */ \ |
| 150 | |
| 151 | enum |
| 152 | { |
| 153 | #define _(f) TCP_BUF_BIT_##f, |
| 154 | foreach_tcp_buf_flag |
| 155 | #undef _ |
| 156 | TCP_N_BUF_BITS, |
| 157 | }; |
| 158 | |
| 159 | enum |
| 160 | { |
| 161 | #define _(f) TCP_BUF_FLAG_##f = 1 << TCP_BUF_BIT_##f, |
| 162 | foreach_tcp_buf_flag |
| 163 | #undef _ |
| 164 | }; |
| 165 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 166 | #define TCP_SCOREBOARD_TRACE (0) |
Florin Coras | e55a6d7 | 2018-10-31 23:09:22 -0700 | [diff] [blame] | 167 | #define TCP_MAX_SACK_BLOCKS 256 /**< Max number of SACK blocks stored */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 168 | #define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0) |
| 169 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 170 | typedef struct _scoreboard_trace_elt |
| 171 | { |
| 172 | u32 start; |
| 173 | u32 end; |
| 174 | u32 ack; |
| 175 | u32 snd_una_max; |
| 176 | u32 group; |
| 177 | } scoreboard_trace_elt_t; |
| 178 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 179 | typedef struct _sack_scoreboard_hole |
| 180 | { |
| 181 | u32 next; /**< Index for next entry in linked list */ |
| 182 | u32 prev; /**< Index for previous entry in linked list */ |
| 183 | u32 start; /**< Start sequence number */ |
| 184 | u32 end; /**< End sequence number */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 185 | u8 is_lost; /**< Mark hole as lost */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 186 | } sack_scoreboard_hole_t; |
| 187 | |
| 188 | typedef struct _sack_scoreboard |
| 189 | { |
| 190 | sack_scoreboard_hole_t *holes; /**< Pool of holes */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 191 | u32 head; /**< Index of first entry */ |
| 192 | u32 tail; /**< Index of last entry */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 193 | u32 sacked_bytes; /**< Number of bytes sacked in sb */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 194 | u32 last_sacked_bytes; /**< Number of bytes last sacked */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 195 | u32 last_bytes_delivered; /**< Number of sack bytes delivered */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 196 | u32 snd_una_adv; /**< Bytes to add to snd_una */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 197 | u32 high_sacked; /**< Highest byte sacked (fack) */ |
| 198 | u32 high_rxt; /**< Highest retransmitted sequence */ |
| 199 | u32 rescue_rxt; /**< Rescue sequence number */ |
| 200 | u32 lost_bytes; /**< Bytes lost as per RFC6675 */ |
| 201 | u32 cur_rxt_hole; /**< Retransmitting from this hole */ |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 202 | |
| 203 | #if TCP_SCOREBOARD_TRACE |
| 204 | scoreboard_trace_elt_t *trace; |
| 205 | #endif |
| 206 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 207 | } sack_scoreboard_t; |
| 208 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 209 | #if TCP_SCOREBOARD_TRACE |
| 210 | #define tcp_scoreboard_trace_add(_tc, _ack) \ |
| 211 | { \ |
| 212 | static u64 _group = 0; \ |
| 213 | sack_scoreboard_t *_sb = &_tc->sack_sb; \ |
| 214 | sack_block_t *_sack, *_sacks; \ |
| 215 | scoreboard_trace_elt_t *_elt; \ |
| 216 | int i; \ |
| 217 | _group++; \ |
| 218 | _sacks = _tc->rcv_opts.sacks; \ |
| 219 | for (i = 0; i < vec_len (_sacks); i++) \ |
| 220 | { \ |
| 221 | _sack = &_sacks[i]; \ |
| 222 | vec_add2 (_sb->trace, _elt, 1); \ |
| 223 | _elt->start = _sack->start; \ |
| 224 | _elt->end = _sack->end; \ |
| 225 | _elt->ack = _elt->end == _ack ? _ack : 0; \ |
| 226 | _elt->snd_una_max = _elt->end == _ack ? _tc->snd_una_max : 0; \ |
| 227 | _elt->group = _group; \ |
| 228 | } \ |
| 229 | } |
| 230 | #else |
| 231 | #define tcp_scoreboard_trace_add(_tc, _ack) |
| 232 | #endif |
| 233 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 234 | sack_scoreboard_hole_t *scoreboard_next_rxt_hole (sack_scoreboard_t * sb, |
| 235 | sack_scoreboard_hole_t * |
| 236 | start, u8 have_sent_1_smss, |
| 237 | u8 * can_rescue, |
| 238 | u8 * snd_limited); |
| 239 | sack_scoreboard_hole_t *scoreboard_get_hole (sack_scoreboard_t * sb, |
| 240 | u32 index); |
| 241 | |
| 242 | sack_scoreboard_hole_t *scoreboard_next_hole (sack_scoreboard_t * sb, |
| 243 | sack_scoreboard_hole_t * hole); |
| 244 | sack_scoreboard_hole_t *scoreboard_prev_hole (sack_scoreboard_t * sb, |
| 245 | sack_scoreboard_hole_t * hole); |
| 246 | sack_scoreboard_hole_t *scoreboard_first_hole (sack_scoreboard_t * sb); |
| 247 | sack_scoreboard_hole_t *scoreboard_last_hole (sack_scoreboard_t * sb); |
| 248 | void scoreboard_clear (sack_scoreboard_t * sb); |
| 249 | void scoreboard_init (sack_scoreboard_t * sb); |
| 250 | u8 *format_tcp_scoreboard (u8 * s, va_list * args); |
| 251 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 252 | typedef enum _tcp_cc_algorithm_type |
| 253 | { |
| 254 | TCP_CC_NEWRENO, |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 255 | TCP_CC_CUBIC, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 256 | } tcp_cc_algorithm_type_e; |
| 257 | |
| 258 | typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t; |
| 259 | |
| 260 | typedef enum _tcp_cc_ack_t |
| 261 | { |
| 262 | TCP_CC_ACK, |
| 263 | TCP_CC_DUPACK, |
| 264 | TCP_CC_PARTIALACK |
| 265 | } tcp_cc_ack_t; |
| 266 | |
| 267 | typedef struct _tcp_connection |
| 268 | { |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 269 | CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 270 | transport_connection_t connection; /**< Common transport data. First! */ |
| 271 | |
| 272 | u8 state; /**< TCP state as per tcp_state_t */ |
| 273 | u16 flags; /**< Connection flags (see tcp_conn_flags_e) */ |
| 274 | u32 timers[TCP_N_TIMERS]; /**< Timer handles into timer wheel */ |
| 275 | |
| 276 | /* TODO RFC4898 */ |
| 277 | |
| 278 | /** Send sequence variables RFC793 */ |
| 279 | u32 snd_una; /**< oldest unacknowledged sequence number */ |
| 280 | u32 snd_una_max; /**< newest unacknowledged sequence number + 1*/ |
| 281 | u32 snd_wnd; /**< send window */ |
| 282 | u32 snd_wl1; /**< seq number used for last snd.wnd update */ |
| 283 | u32 snd_wl2; /**< ack number used for last snd.wnd update */ |
| 284 | u32 snd_nxt; /**< next seq number to be sent */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 285 | u16 snd_mss; /**< Effective send max seg (data) size */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 286 | |
| 287 | /** Receive sequence variables RFC793 */ |
| 288 | u32 rcv_nxt; /**< next sequence number expected */ |
| 289 | u32 rcv_wnd; /**< receive window we expect */ |
| 290 | |
| 291 | u32 rcv_las; /**< rcv_nxt at last ack sent/rcv_wnd update */ |
| 292 | u32 iss; /**< initial sent sequence */ |
| 293 | u32 irs; /**< initial remote sequence */ |
| 294 | |
| 295 | /* Options */ |
Florin Coras | c834341 | 2017-05-04 14:25:50 -0700 | [diff] [blame] | 296 | u8 snd_opts_len; /**< Tx options len */ |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 297 | u8 rcv_wscale; /**< Window scale to advertise to peer */ |
| 298 | u8 snd_wscale; /**< Window scale to use when sending */ |
| 299 | u32 tsval_recent; /**< Last timestamp received */ |
| 300 | u32 tsval_recent_age; /**< When last updated tstamp_recent*/ |
| 301 | tcp_options_t snd_opts; /**< Tx options for connection */ |
| 302 | tcp_options_t rcv_opts; /**< Rx options for connection */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 303 | |
| 304 | sack_block_t *snd_sacks; /**< Vector of SACKs to send. XXX Fixed size? */ |
| 305 | sack_scoreboard_t sack_sb; /**< SACK "scoreboard" that tracks holes */ |
| 306 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 307 | u16 rcv_dupacks; /**< Number of DUPACKs received */ |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 308 | u8 pending_dupacks; /**< Number of DUPACKs to be sent */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 309 | |
| 310 | /* Congestion control */ |
| 311 | u32 cwnd; /**< Congestion window */ |
Florin Coras | 6216600 | 2018-04-18 16:40:55 -0700 | [diff] [blame] | 312 | u32 cwnd_acc_bytes; /**< Bytes accumulated for cwnd increment */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 313 | u32 ssthresh; /**< Slow-start threshold */ |
| 314 | u32 prev_ssthresh; /**< ssthresh before congestion */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 315 | u32 prev_cwnd; /**< ssthresh before congestion */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 316 | u32 bytes_acked; /**< Bytes acknowledged by current segment */ |
Florin Coras | 9ece3c0 | 2018-11-05 11:06:53 -0800 | [diff] [blame] | 317 | u32 burst_acked; /**< Bytes acknowledged in current burst */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 318 | u32 snd_rxt_bytes; /**< Retransmitted bytes */ |
| 319 | u32 snd_rxt_ts; /**< Timestamp when first packet is retransmitted */ |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 320 | u32 tsecr_last_ack; /**< Timestamp echoed to us in last healthy ACK */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 321 | u32 snd_congestion; /**< snd_una_max when congestion is detected */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 322 | tcp_cc_algorithm_t *cc_algo; /**< Congestion control algorithm */ |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 323 | u8 cc_data[TCP_CC_DATA_SZ]; /**< Congestion control algo private data */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 324 | |
| 325 | /* RTT and RTO */ |
| 326 | u32 rto; /**< Retransmission timeout */ |
| 327 | u32 rto_boff; /**< Index for RTO backoff */ |
| 328 | u32 srtt; /**< Smoothed RTT */ |
| 329 | u32 rttvar; /**< Smoothed mean RTT difference. Approximates variance */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 330 | u32 rtt_seq; /**< Sequence number for tracked ACK */ |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 331 | f64 rtt_ts; /**< Timestamp for tracked ACK */ |
| 332 | f64 mrtt_us; /**< High precision mrtt from tracked acks */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 333 | |
Florin Coras | c834341 | 2017-05-04 14:25:50 -0700 | [diff] [blame] | 334 | u16 mss; /**< Our max seg size that includes options */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 335 | u32 limited_transmit; /**< snd_nxt when limited transmit starts */ |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 336 | u32 last_fib_check; /**< Last time we checked fib route for peer */ |
Florin Coras | f9d0568 | 2018-04-26 08:26:52 -0700 | [diff] [blame] | 337 | u32 sw_if_index; /**< Interface for the connection */ |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 338 | u32 tx_fifo_size; /**< Tx fifo size. Used to constrain cwnd */ |
Florin Coras | 42ceddb | 2018-12-12 10:56:01 -0800 | [diff] [blame] | 339 | |
| 340 | u32 psh_seq; /**< Add psh header for seg that includes this */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 341 | } tcp_connection_t; |
| 342 | |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 343 | /* *INDENT-OFF* */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 344 | struct _tcp_cc_algorithm |
| 345 | { |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 346 | const char *name; |
| 347 | uword (*unformat_cfg) (unformat_input_t * input); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 348 | void (*rcv_ack) (tcp_connection_t * tc); |
| 349 | void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack); |
| 350 | void (*congestion) (tcp_connection_t * tc); |
| 351 | void (*recovered) (tcp_connection_t * tc); |
| 352 | void (*init) (tcp_connection_t * tc); |
| 353 | }; |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 354 | /* *INDENT-ON* */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 355 | |
| 356 | #define tcp_fastrecovery_on(tc) (tc)->flags |= TCP_CONN_FAST_RECOVERY |
| 357 | #define tcp_fastrecovery_off(tc) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 358 | #define tcp_recovery_on(tc) (tc)->flags |= TCP_CONN_RECOVERY |
| 359 | #define tcp_recovery_off(tc) (tc)->flags &= ~TCP_CONN_RECOVERY |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 360 | #define tcp_in_fastrecovery(tc) ((tc)->flags & TCP_CONN_FAST_RECOVERY) |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 361 | #define tcp_in_recovery(tc) ((tc)->flags & (TCP_CONN_RECOVERY)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 362 | #define tcp_in_slowstart(tc) (tc->cwnd < tc->ssthresh) |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 363 | #define tcp_disconnect_pending(tc) ((tc)->flags & TCP_CONN_DCNT_PENDING) |
| 364 | #define tcp_disconnect_pending_on(tc) ((tc)->flags |= TCP_CONN_DCNT_PENDING) |
| 365 | #define tcp_disconnect_pending_off(tc) ((tc)->flags &= ~TCP_CONN_DCNT_PENDING) |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 366 | #define tcp_fastrecovery_first(tc) ((tc)->flags & TCP_CONN_FRXT_FIRST) |
| 367 | #define tcp_fastrecovery_first_on(tc) ((tc)->flags |= TCP_CONN_FRXT_FIRST) |
| 368 | #define tcp_fastrecovery_first_off(tc) ((tc)->flags &= ~TCP_CONN_FRXT_FIRST) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 369 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 370 | #define tcp_in_cong_recovery(tc) ((tc)->flags & \ |
| 371 | (TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY)) |
| 372 | |
| 373 | always_inline void |
| 374 | tcp_cong_recovery_off (tcp_connection_t * tc) |
| 375 | { |
| 376 | tc->flags &= ~(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY); |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 377 | tcp_fastrecovery_first_off (tc); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 378 | } |
| 379 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 380 | typedef enum _tcp_error |
| 381 | { |
| 382 | #define tcp_error(n,s) TCP_ERROR_##n, |
| 383 | #include <vnet/tcp/tcp_error.def> |
| 384 | #undef tcp_error |
| 385 | TCP_N_ERROR, |
| 386 | } tcp_error_t; |
| 387 | |
| 388 | typedef struct _tcp_lookup_dispatch |
| 389 | { |
| 390 | u8 next, error; |
| 391 | } tcp_lookup_dispatch_t; |
| 392 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 393 | typedef struct tcp_worker_ctx_ |
| 394 | { |
| 395 | CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 396 | /** worker time */ |
| 397 | u32 time_now; |
| 398 | |
| 399 | /** worker timer wheel */ |
| 400 | tw_timer_wheel_16t_2w_512sl_t timer_wheel; |
| 401 | |
| 402 | /** tx buffer free list */ |
| 403 | u32 *tx_buffers; |
| 404 | |
| 405 | /** tx frames for tcp 4/6 output nodes */ |
| 406 | vlib_frame_t *tx_frames[2]; |
| 407 | |
| 408 | /** tx frames for ip 4/6 lookup nodes */ |
| 409 | vlib_frame_t *ip_lookup_tx_frames[2]; |
| 410 | |
| 411 | /** vector of connections needing fast rxt */ |
| 412 | u32 *pending_fast_rxt; |
| 413 | |
| 414 | /** vector of connections now doing fast rxt */ |
| 415 | u32 *ongoing_fast_rxt; |
| 416 | |
| 417 | /** vector of connections that will do fast rxt */ |
| 418 | u32 *postponed_fast_rxt; |
| 419 | |
| 420 | /** vector of pending ack dequeues */ |
Florin Coras | 9ece3c0 | 2018-11-05 11:06:53 -0800 | [diff] [blame] | 421 | u32 *pending_deq_acked; |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 422 | |
| 423 | /** vector of pending acks */ |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 424 | u32 *pending_acks; |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 425 | |
| 426 | /** vector of pending disconnect notifications */ |
| 427 | u32 *pending_disconnects; |
| 428 | |
| 429 | /** convenience pointer to this thread's vlib main */ |
| 430 | vlib_main_t *vm; |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 431 | |
Florin Coras | b26743d | 2018-06-26 09:31:04 -0700 | [diff] [blame] | 432 | CLIB_CACHE_LINE_ALIGN_MARK (cacheline1); |
Florin Coras | b11175d | 2018-11-09 14:34:08 -0800 | [diff] [blame] | 433 | |
| 434 | /** cached 'on the wire' options for bursts */ |
| 435 | u8 cached_opts[40]; |
Florin Coras | bf4d5ce | 2018-10-19 16:26:24 -0700 | [diff] [blame] | 436 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 437 | } tcp_worker_ctx_t; |
| 438 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 439 | typedef struct _tcp_main |
| 440 | { |
| 441 | /* Per-worker thread tcp connection pools */ |
| 442 | tcp_connection_t **connections; |
| 443 | |
| 444 | /* Pool of listeners. */ |
| 445 | tcp_connection_t *listener_pool; |
| 446 | |
| 447 | /** Dispatch table by state and flags */ |
| 448 | tcp_lookup_dispatch_t dispatch_table[TCP_N_STATES][64]; |
| 449 | |
| 450 | u8 log2_tstamp_clocks_per_tick; |
| 451 | f64 tstamp_ticks_per_clock; |
| 452 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 453 | /** per-worker context */ |
| 454 | tcp_worker_ctx_t *wrk_ctx; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 455 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 456 | /* Pool of half-open connections on which we've sent a SYN */ |
| 457 | tcp_connection_t *half_open_connections; |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 458 | clib_spinlock_t half_open_lock; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 459 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 460 | /* Congestion control algorithms registered */ |
| 461 | tcp_cc_algorithm_t *cc_algos; |
| 462 | |
Florin Coras | ca03186 | 2018-09-24 13:58:05 -0700 | [diff] [blame] | 463 | /** vlib buffer size */ |
| 464 | u32 bytes_per_buffer; |
| 465 | |
| 466 | /* |
| 467 | * Configuration |
| 468 | */ |
| 469 | |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 470 | /* Flag that indicates if stack is on or off */ |
| 471 | u8 is_enabled; |
| 472 | |
Florin Coras | ca03186 | 2018-09-24 13:58:05 -0700 | [diff] [blame] | 473 | /** Max rx fifo size for a session. It is used in to compute the |
| 474 | * rfc 7323 window scaling factor */ |
| 475 | u32 max_rx_fifo; |
| 476 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 477 | /** Number of preallocated connections */ |
| 478 | u32 preallocated_connections; |
| 479 | u32 preallocated_half_open_connections; |
| 480 | |
| 481 | /** Vectors of src addresses. Optional unless one needs > 63K active-opens */ |
| 482 | ip4_address_t *ip4_src_addresses; |
| 483 | u32 last_v4_address_rotor; |
| 484 | u32 last_v6_address_rotor; |
| 485 | ip6_address_t *ip6_src_addresses; |
| 486 | |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 487 | /** Enable tx pacing for new connections */ |
| 488 | u8 tx_pacing; |
| 489 | |
Pierre Pfister | 7fe51f3 | 2017-09-20 08:48:36 +0200 | [diff] [blame] | 490 | u8 punt_unknown4; |
| 491 | u8 punt_unknown6; |
Florin Coras | f988e69 | 2017-11-27 04:34:14 -0500 | [diff] [blame] | 492 | |
| 493 | /** fault-injection */ |
| 494 | f64 buffer_fail_fraction; |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 495 | |
Florin Coras | aa01abb | 2018-11-12 09:13:10 -0800 | [diff] [blame] | 496 | /** Default congestion control algorithm type */ |
| 497 | tcp_cc_algorithm_type_e cc_algo; |
| 498 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 499 | } tcp_main_t; |
| 500 | |
| 501 | extern tcp_main_t tcp_main; |
| 502 | extern vlib_node_registration_t tcp4_input_node; |
| 503 | extern vlib_node_registration_t tcp6_input_node; |
| 504 | extern vlib_node_registration_t tcp4_output_node; |
| 505 | extern vlib_node_registration_t tcp6_output_node; |
| 506 | |
| 507 | always_inline tcp_main_t * |
| 508 | vnet_get_tcp_main () |
| 509 | { |
| 510 | return &tcp_main; |
| 511 | } |
| 512 | |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 513 | always_inline tcp_worker_ctx_t * |
| 514 | tcp_get_worker (u32 thread_index) |
| 515 | { |
| 516 | return &tcp_main.wrk_ctx[thread_index]; |
| 517 | } |
| 518 | |
Florin Coras | 82b13a8 | 2017-04-25 11:58:06 -0700 | [diff] [blame] | 519 | always_inline tcp_header_t * |
| 520 | tcp_buffer_hdr (vlib_buffer_t * b) |
| 521 | { |
| 522 | ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE); |
| 523 | return (tcp_header_t *) (b->data + b->current_data |
| 524 | + vnet_buffer (b)->tcp.hdr_offset); |
| 525 | } |
| 526 | |
Florin Coras | f988e69 | 2017-11-27 04:34:14 -0500 | [diff] [blame] | 527 | #if (VLIB_BUFFER_TRACE_TRAJECTORY) |
| 528 | #define tcp_trajectory_add_start(b, start) \ |
| 529 | { \ |
| 530 | (*vlib_buffer_trace_trajectory_cb) (b, start); \ |
| 531 | } |
| 532 | #else |
| 533 | #define tcp_trajectory_add_start(b, start) |
| 534 | #endif |
| 535 | |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 536 | clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en); |
| 537 | |
Pierre Pfister | 7fe51f3 | 2017-09-20 08:48:36 +0200 | [diff] [blame] | 538 | void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add); |
| 539 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 540 | always_inline tcp_connection_t * |
| 541 | tcp_connection_get (u32 conn_index, u32 thread_index) |
| 542 | { |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 543 | if (PREDICT_FALSE |
| 544 | (pool_is_free_index (tcp_main.connections[thread_index], conn_index))) |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 545 | return 0; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 546 | return pool_elt_at_index (tcp_main.connections[thread_index], conn_index); |
| 547 | } |
| 548 | |
| 549 | always_inline tcp_connection_t * |
| 550 | tcp_connection_get_if_valid (u32 conn_index, u32 thread_index) |
| 551 | { |
| 552 | if (tcp_main.connections[thread_index] == 0) |
| 553 | return 0; |
| 554 | if (pool_is_free_index (tcp_main.connections[thread_index], conn_index)) |
| 555 | return 0; |
| 556 | return pool_elt_at_index (tcp_main.connections[thread_index], conn_index); |
| 557 | } |
| 558 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 559 | always_inline tcp_connection_t * |
| 560 | tcp_get_connection_from_transport (transport_connection_t * tconn) |
| 561 | { |
| 562 | return (tcp_connection_t *) tconn; |
| 563 | } |
| 564 | |
Florin Coras | 54ddf43 | 2018-12-21 13:54:09 -0800 | [diff] [blame^] | 565 | always_inline void |
| 566 | tcp_connection_set_state (tcp_connection_t * tc, tcp_state_t state) |
| 567 | { |
| 568 | tc->state = state; |
| 569 | TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); |
| 570 | } |
| 571 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 572 | void tcp_connection_close (tcp_connection_t * tc); |
| 573 | void tcp_connection_cleanup (tcp_connection_t * tc); |
| 574 | void tcp_connection_del (tcp_connection_t * tc); |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 575 | int tcp_half_open_connection_cleanup (tcp_connection_t * tc); |
Florin Coras | 8124cb7 | 2018-12-16 20:57:29 -0800 | [diff] [blame] | 576 | tcp_connection_t *tcp_connection_alloc (u8 thread_index); |
| 577 | void tcp_connection_free (tcp_connection_t * tc); |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 578 | void tcp_connection_reset (tcp_connection_t * tc); |
Dave Barach | 3bbcfab | 2017-08-15 19:03:44 -0400 | [diff] [blame] | 579 | int tcp_configure_v4_source_address_range (vlib_main_t * vm, |
| 580 | ip4_address_t * start, |
| 581 | ip4_address_t * end, u32 table_id); |
| 582 | int tcp_configure_v6_source_address_range (vlib_main_t * vm, |
| 583 | ip6_address_t * start, |
| 584 | ip6_address_t * end, u32 table_id); |
| 585 | void tcp_api_reference (void); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 586 | u8 *format_tcp_connection (u8 * s, va_list * args); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 587 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 588 | always_inline tcp_connection_t * |
| 589 | tcp_listener_get (u32 tli) |
| 590 | { |
| 591 | return pool_elt_at_index (tcp_main.listener_pool, tli); |
| 592 | } |
| 593 | |
| 594 | always_inline tcp_connection_t * |
| 595 | tcp_half_open_connection_get (u32 conn_index) |
| 596 | { |
Florin Coras | 6881062 | 2017-07-24 17:40:28 -0700 | [diff] [blame] | 597 | tcp_connection_t *tc = 0; |
| 598 | clib_spinlock_lock_if_init (&tcp_main.half_open_lock); |
| 599 | if (!pool_is_free_index (tcp_main.half_open_connections, conn_index)) |
| 600 | tc = pool_elt_at_index (tcp_main.half_open_connections, conn_index); |
| 601 | clib_spinlock_unlock_if_init (&tcp_main.half_open_lock); |
| 602 | return tc; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | void tcp_make_ack (tcp_connection_t * ts, vlib_buffer_t * b); |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 606 | void tcp_make_fin (tcp_connection_t * tc, vlib_buffer_t * b); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 607 | void tcp_make_synack (tcp_connection_t * ts, vlib_buffer_t * b); |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 608 | void tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt, |
| 609 | u8 is_ip4); |
| 610 | void tcp_send_reset (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 611 | void tcp_send_syn (tcp_connection_t * tc); |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 612 | void tcp_send_synack (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 613 | void tcp_send_fin (tcp_connection_t * tc); |
Florin Coras | c834341 | 2017-05-04 14:25:50 -0700 | [diff] [blame] | 614 | void tcp_init_mss (tcp_connection_t * tc); |
Florin Coras | b26743d | 2018-06-26 09:31:04 -0700 | [diff] [blame] | 615 | void tcp_update_burst_snd_vars (tcp_connection_t * tc); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 616 | void tcp_update_rto (tcp_connection_t * tc); |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 617 | void tcp_flush_frame_to_output (tcp_worker_ctx_t * wrk, u8 is_ip4); |
| 618 | void tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk); |
| 619 | void tcp_program_fastretransmit (tcp_worker_ctx_t * wrk, |
| 620 | tcp_connection_t * tc); |
| 621 | void tcp_do_fastretransmits (tcp_worker_ctx_t * wrk); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 622 | |
Florin Coras | 7ac053b | 2018-11-05 15:57:21 -0800 | [diff] [blame] | 623 | void tcp_program_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc); |
| 624 | void tcp_program_dupack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc); |
| 625 | void tcp_send_acks (tcp_worker_ctx_t * wrk); |
| 626 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 627 | always_inline u32 |
| 628 | tcp_end_seq (tcp_header_t * th, u32 len) |
| 629 | { |
| 630 | return th->seq_number + tcp_is_syn (th) + tcp_is_fin (th) + len; |
| 631 | } |
| 632 | |
| 633 | /* Modulo arithmetic for TCP sequence numbers */ |
| 634 | #define seq_lt(_s1, _s2) ((i32)((_s1)-(_s2)) < 0) |
| 635 | #define seq_leq(_s1, _s2) ((i32)((_s1)-(_s2)) <= 0) |
| 636 | #define seq_gt(_s1, _s2) ((i32)((_s1)-(_s2)) > 0) |
| 637 | #define seq_geq(_s1, _s2) ((i32)((_s1)-(_s2)) >= 0) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 638 | #define seq_max(_s1, _s2) (seq_gt((_s1), (_s2)) ? (_s1) : (_s2)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 639 | |
| 640 | /* Modulo arithmetic for timestamps */ |
| 641 | #define timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0) |
| 642 | #define timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0) |
| 643 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 644 | /** |
| 645 | * Our estimate of the number of bytes that have left the network |
| 646 | */ |
| 647 | always_inline u32 |
| 648 | tcp_bytes_out (const tcp_connection_t * tc) |
| 649 | { |
| 650 | if (tcp_opts_sack_permitted (&tc->rcv_opts)) |
| 651 | return tc->sack_sb.sacked_bytes + tc->sack_sb.lost_bytes; |
| 652 | else |
| 653 | return tc->rcv_dupacks * tc->snd_mss; |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * Our estimate of the number of bytes in flight (pipe size) |
| 658 | */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 659 | always_inline u32 |
| 660 | tcp_flight_size (const tcp_connection_t * tc) |
| 661 | { |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 662 | int flight_size; |
| 663 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 664 | flight_size = (int) (tc->snd_una_max - tc->snd_una) - tcp_bytes_out (tc) |
| 665 | + tc->snd_rxt_bytes; |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 666 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 667 | if (flight_size < 0) |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 668 | { |
| 669 | if (0) |
| 670 | clib_warning |
| 671 | ("Negative: %u %u %u dupacks %u sacked bytes %u flags %d", |
| 672 | tc->snd_una_max - tc->snd_una, tcp_bytes_out (tc), |
| 673 | tc->snd_rxt_bytes, tc->rcv_dupacks, tc->sack_sb.sacked_bytes, |
| 674 | tc->rcv_opts.flags); |
| 675 | return 0; |
| 676 | } |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 677 | |
| 678 | return flight_size; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | /** |
| 682 | * Initial cwnd as per RFC5681 |
| 683 | */ |
| 684 | always_inline u32 |
| 685 | tcp_initial_cwnd (const tcp_connection_t * tc) |
| 686 | { |
| 687 | if (tc->snd_mss > 2190) |
| 688 | return 2 * tc->snd_mss; |
| 689 | else if (tc->snd_mss > 1095) |
| 690 | return 3 * tc->snd_mss; |
| 691 | else |
| 692 | return 4 * tc->snd_mss; |
| 693 | } |
| 694 | |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 695 | /* |
| 696 | * Accumulate acked bytes for cwnd increase |
| 697 | * |
| 698 | * Once threshold bytes are accumulated, snd_mss bytes are added |
| 699 | * to the cwnd. |
| 700 | */ |
| 701 | always_inline void |
| 702 | tcp_cwnd_accumulate (tcp_connection_t * tc, u32 thresh, u32 bytes) |
| 703 | { |
| 704 | tc->cwnd_acc_bytes += bytes; |
| 705 | if (tc->cwnd_acc_bytes >= thresh) |
| 706 | { |
| 707 | u32 inc = tc->cwnd_acc_bytes / thresh; |
| 708 | tc->cwnd_acc_bytes -= inc * thresh; |
| 709 | tc->cwnd += inc * tc->snd_mss; |
| 710 | tc->cwnd = clib_min (tc->cwnd, tc->tx_fifo_size); |
| 711 | } |
| 712 | } |
| 713 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 714 | always_inline u32 |
| 715 | tcp_loss_wnd (const tcp_connection_t * tc) |
| 716 | { |
| 717 | return tc->snd_mss; |
| 718 | } |
| 719 | |
| 720 | always_inline u32 |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 721 | tcp_available_snd_wnd (const tcp_connection_t * tc) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 722 | { |
| 723 | return clib_min (tc->cwnd, tc->snd_wnd); |
| 724 | } |
| 725 | |
| 726 | always_inline u32 |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 727 | tcp_available_output_snd_space (const tcp_connection_t * tc) |
| 728 | { |
| 729 | u32 available_wnd = tcp_available_snd_wnd (tc); |
| 730 | int flight_size = (int) (tc->snd_nxt - tc->snd_una); |
| 731 | |
| 732 | if (available_wnd <= flight_size) |
| 733 | return 0; |
| 734 | |
| 735 | return available_wnd - flight_size; |
| 736 | } |
| 737 | |
| 738 | /** |
| 739 | * Estimate of how many bytes we can still push into the network |
| 740 | */ |
| 741 | always_inline u32 |
Florin Coras | ca1c8f3 | 2018-05-23 21:01:30 -0700 | [diff] [blame] | 742 | tcp_available_cc_snd_space (const tcp_connection_t * tc) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 743 | { |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 744 | u32 available_wnd = tcp_available_snd_wnd (tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 745 | u32 flight_size = tcp_flight_size (tc); |
| 746 | |
| 747 | if (available_wnd <= flight_size) |
| 748 | return 0; |
| 749 | |
| 750 | return available_wnd - flight_size; |
| 751 | } |
| 752 | |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 753 | always_inline u8 |
| 754 | tcp_is_lost_fin (tcp_connection_t * tc) |
| 755 | { |
| 756 | if ((tc->flags & TCP_CONN_FINSNT) && tc->snd_una_max - tc->snd_una == 1) |
| 757 | return 1; |
| 758 | return 0; |
| 759 | } |
| 760 | |
Florin Coras | 45ca73f | 2018-09-27 09:19:29 -0700 | [diff] [blame] | 761 | u32 tcp_snd_space (tcp_connection_t * tc); |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 762 | int tcp_retransmit_first_unacked (tcp_worker_ctx_t * wrk, |
| 763 | tcp_connection_t * tc); |
| 764 | int tcp_fast_retransmit_no_sack (tcp_worker_ctx_t * wrk, |
| 765 | tcp_connection_t * tc, u32 burst_size); |
| 766 | int tcp_fast_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, |
| 767 | u32 burst_size); |
| 768 | int tcp_fast_retransmit (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, |
| 769 | u32 burst_size); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 770 | void tcp_cc_init_congestion (tcp_connection_t * tc); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 771 | void tcp_cc_fastrecovery_exit (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 772 | |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 773 | fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc); |
| 774 | |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 775 | /* Made public for unit testing only */ |
| 776 | 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] | 777 | u32 tcp_sack_list_bytes (tcp_connection_t * tc); |
Florin Coras | 45d3496 | 2017-04-25 00:05:27 -0700 | [diff] [blame] | 778 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 779 | always_inline u32 |
| 780 | tcp_time_now (void) |
| 781 | { |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 782 | return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now; |
Florin Coras | 82d3ec8 | 2017-08-14 08:10:42 -0700 | [diff] [blame] | 783 | } |
| 784 | |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 785 | always_inline u32 |
| 786 | tcp_time_now_w_thread (u32 thread_index) |
| 787 | { |
| 788 | return tcp_main.wrk_ctx[thread_index].time_now; |
| 789 | } |
| 790 | |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 791 | always_inline f64 |
| 792 | tcp_time_now_us (u32 thread_index) |
| 793 | { |
| 794 | return transport_time_now (thread_index); |
| 795 | } |
| 796 | |
Florin Coras | 82d3ec8 | 2017-08-14 08:10:42 -0700 | [diff] [blame] | 797 | always_inline u32 |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 798 | tcp_set_time_now (tcp_worker_ctx_t * wrk) |
Florin Coras | 82d3ec8 | 2017-08-14 08:10:42 -0700 | [diff] [blame] | 799 | { |
Florin Coras | be72ae6 | 2018-11-01 11:23:03 -0700 | [diff] [blame] | 800 | wrk->time_now = clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock; |
| 801 | return wrk->time_now; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 802 | } |
| 803 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 804 | u32 tcp_push_header (tcp_connection_t * tconn, vlib_buffer_t * b); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 805 | |
| 806 | void tcp_connection_timers_init (tcp_connection_t * tc); |
| 807 | void tcp_connection_timers_reset (tcp_connection_t * tc); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 808 | void tcp_init_snd_vars (tcp_connection_t * tc); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 809 | void tcp_connection_init_vars (tcp_connection_t * tc); |
Florin Coras | c44a558 | 2018-11-01 16:30:54 -0700 | [diff] [blame] | 810 | void tcp_connection_tx_pacer_update (tcp_connection_t * tc); |
| 811 | void tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window, |
| 812 | u32 start_bucket); |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 813 | |
| 814 | always_inline void |
| 815 | tcp_cc_rcv_ack (tcp_connection_t * tc) |
| 816 | { |
| 817 | tc->cc_algo->rcv_ack (tc); |
Florin Coras | d67f112 | 2018-05-21 17:47:40 -0700 | [diff] [blame] | 818 | tc->tsecr_last_ack = tc->rcv_opts.tsecr; |
| 819 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 820 | |
| 821 | always_inline void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 822 | tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval) |
| 823 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 824 | ASSERT (tc->c_thread_index == vlib_get_thread_index ()); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 825 | ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID); |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 826 | tc->timers[timer_id] = |
| 827 | tw_timer_start_16t_2w_512sl (&tcp_main. |
| 828 | wrk_ctx[tc->c_thread_index].timer_wheel, |
| 829 | tc->c_c_index, timer_id, interval); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | always_inline void |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 833 | tcp_timer_reset (tcp_connection_t * tc, u8 timer_id) |
| 834 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 835 | ASSERT (tc->c_thread_index == vlib_get_thread_index ()); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 836 | if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID) |
| 837 | return; |
| 838 | |
Florin Coras | 2c41443 | 2018-06-19 09:58:04 -0700 | [diff] [blame] | 839 | tw_timer_stop_16t_2w_512sl (&tcp_main. |
| 840 | wrk_ctx[tc->c_thread_index].timer_wheel, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 841 | tc->timers[timer_id]); |
| 842 | tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID; |
| 843 | } |
| 844 | |
| 845 | always_inline void |
| 846 | tcp_timer_update (tcp_connection_t * tc, u8 timer_id, u32 interval) |
| 847 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 848 | ASSERT (tc->c_thread_index == vlib_get_thread_index ()); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 849 | if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID) |
Florin Coras | adb5bd5 | 2018-06-22 15:29:38 -0700 | [diff] [blame] | 850 | tw_timer_update_16t_2w_512sl (&tcp_main. |
| 851 | wrk_ctx[tc->c_thread_index].timer_wheel, |
| 852 | tc->timers[timer_id], interval); |
| 853 | else |
| 854 | tc->timers[timer_id] = |
| 855 | tw_timer_start_16t_2w_512sl (&tcp_main. |
| 856 | wrk_ctx[tc->c_thread_index].timer_wheel, |
| 857 | tc->c_c_index, timer_id, interval); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 858 | } |
| 859 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 860 | always_inline void |
| 861 | tcp_retransmit_timer_set (tcp_connection_t * tc) |
| 862 | { |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 863 | ASSERT (tc->snd_una != tc->snd_una_max); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 864 | tcp_timer_set (tc, TCP_TIMER_RETRANSMIT, |
| 865 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
| 866 | } |
| 867 | |
| 868 | always_inline void |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 869 | tcp_retransmit_timer_reset (tcp_connection_t * tc) |
| 870 | { |
| 871 | tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT); |
| 872 | } |
| 873 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 874 | always_inline void |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 875 | tcp_retransmit_timer_force_update (tcp_connection_t * tc) |
| 876 | { |
| 877 | tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, |
| 878 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
| 879 | } |
| 880 | |
| 881 | always_inline void |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 882 | tcp_persist_timer_set (tcp_connection_t * tc) |
| 883 | { |
| 884 | /* Reuse RTO. It's backed off in handler */ |
| 885 | tcp_timer_set (tc, TCP_TIMER_PERSIST, |
Florin Coras | 5921f98 | 2017-04-03 18:00:00 -0700 | [diff] [blame] | 886 | clib_max (tc->rto * TCP_TO_TIMER_TICK, |
| 887 | TCP_TIMER_PERSIST_MIN)); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | always_inline void |
| 891 | tcp_persist_timer_update (tcp_connection_t * tc) |
| 892 | { |
| 893 | tcp_timer_update (tc, TCP_TIMER_PERSIST, |
Florin Coras | 5921f98 | 2017-04-03 18:00:00 -0700 | [diff] [blame] | 894 | clib_max (tc->rto * TCP_TO_TIMER_TICK, |
| 895 | TCP_TIMER_PERSIST_MIN)); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 896 | } |
| 897 | |
| 898 | always_inline void |
| 899 | tcp_persist_timer_reset (tcp_connection_t * tc) |
| 900 | { |
| 901 | tcp_timer_reset (tc, TCP_TIMER_PERSIST); |
| 902 | } |
| 903 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 904 | always_inline void |
| 905 | tcp_retransmit_timer_update (tcp_connection_t * tc) |
| 906 | { |
| 907 | if (tc->snd_una == tc->snd_una_max) |
| 908 | { |
| 909 | tcp_retransmit_timer_reset (tc); |
| 910 | if (tc->snd_wnd < tc->snd_mss) |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 911 | tcp_persist_timer_update (tc); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 912 | } |
| 913 | else |
| 914 | tcp_timer_update (tc, TCP_TIMER_RETRANSMIT, |
| 915 | clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); |
| 916 | } |
| 917 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 918 | always_inline u8 |
| 919 | tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer) |
| 920 | { |
| 921 | return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID; |
| 922 | } |
| 923 | |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 924 | #define tcp_validate_txf_size(_tc, _a) \ |
| 925 | ASSERT(_tc->state != TCP_STATE_ESTABLISHED \ |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 926 | || session_tx_fifo_max_dequeue (&_tc->connection) >= _a) |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 927 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 928 | void tcp_rcv_sacks (tcp_connection_t * tc, u32 ack); |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 929 | u8 *tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose); |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 930 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 931 | void tcp_cc_algo_register (tcp_cc_algorithm_type_e type, |
| 932 | const tcp_cc_algorithm_t * vft); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 933 | |
Florin Coras | 0dbd517 | 2018-06-25 16:19:34 -0700 | [diff] [blame] | 934 | 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] | 935 | |
Florin Coras | 2e31cc3 | 2018-09-25 14:00:34 -0700 | [diff] [blame] | 936 | static inline void * |
| 937 | tcp_cc_data (tcp_connection_t * tc) |
| 938 | { |
| 939 | return (void *) tc->cc_data; |
| 940 | } |
| 941 | |
| 942 | void newreno_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type); |
| 943 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 944 | /** |
| 945 | * Push TCP header to buffer |
| 946 | * |
| 947 | * @param vm - vlib_main |
| 948 | * @param b - buffer to write the header to |
| 949 | * @param sp_net - source port net order |
| 950 | * @param dp_net - destination port net order |
| 951 | * @param seq - sequence number net order |
| 952 | * @param ack - ack number net order |
| 953 | * @param tcp_hdr_opts_len - header and options length in bytes |
| 954 | * @param flags - header flags |
| 955 | * @param wnd - window size |
| 956 | * |
| 957 | * @return - pointer to start of TCP header |
| 958 | */ |
| 959 | always_inline void * |
| 960 | vlib_buffer_push_tcp_net_order (vlib_buffer_t * b, u16 sp, u16 dp, u32 seq, |
| 961 | u32 ack, u8 tcp_hdr_opts_len, u8 flags, |
| 962 | u16 wnd) |
| 963 | { |
| 964 | tcp_header_t *th; |
| 965 | |
| 966 | th = vlib_buffer_push_uninit (b, tcp_hdr_opts_len); |
| 967 | |
| 968 | th->src_port = sp; |
| 969 | th->dst_port = dp; |
| 970 | th->seq_number = seq; |
| 971 | th->ack_number = ack; |
| 972 | th->data_offset_and_reserved = (tcp_hdr_opts_len >> 2) << 4; |
| 973 | th->flags = flags; |
| 974 | th->window = wnd; |
| 975 | th->checksum = 0; |
| 976 | th->urgent_pointer = 0; |
| 977 | return th; |
| 978 | } |
| 979 | |
| 980 | /** |
| 981 | * Push TCP header to buffer |
| 982 | * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 983 | * @param b - buffer to write the header to |
| 984 | * @param sp_net - source port net order |
| 985 | * @param dp_net - destination port net order |
| 986 | * @param seq - sequence number host order |
| 987 | * @param ack - ack number host order |
| 988 | * @param tcp_hdr_opts_len - header and options length in bytes |
| 989 | * @param flags - header flags |
| 990 | * @param wnd - window size |
| 991 | * |
| 992 | * @return - pointer to start of TCP header |
| 993 | */ |
| 994 | always_inline void * |
| 995 | vlib_buffer_push_tcp (vlib_buffer_t * b, u16 sp_net, u16 dp_net, u32 seq, |
| 996 | u32 ack, u8 tcp_hdr_opts_len, u8 flags, u16 wnd) |
| 997 | { |
| 998 | return vlib_buffer_push_tcp_net_order (b, sp_net, dp_net, |
| 999 | clib_host_to_net_u32 (seq), |
| 1000 | clib_host_to_net_u32 (ack), |
| 1001 | tcp_hdr_opts_len, flags, |
| 1002 | clib_host_to_net_u16 (wnd)); |
| 1003 | } |
| 1004 | |
| 1005 | #endif /* _vnet_tcp_h_ */ |
| 1006 | |
| 1007 | /* |
| 1008 | * fd.io coding-style-patch-verification: ON |
| 1009 | * |
| 1010 | * Local Variables: |
| 1011 | * eval: (c-set-style "gnu") |
| 1012 | * End: |
| 1013 | */ |