Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 1 | /* |
| 2 | * include/types/connection.h |
| 3 | * This file describes the connection struct and associated constants. |
| 4 | * |
Willy Tarreau | baf5b9b | 2014-01-23 15:26:18 +0100 | [diff] [blame] | 5 | * Copyright (C) 2000-2014 Willy Tarreau - w@1wt.eu |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation, version 2.1 |
| 10 | * exclusively. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef _TYPES_CONNECTION_H |
| 23 | #define _TYPES_CONNECTION_H |
| 24 | |
| 25 | #include <stdlib.h> |
| 26 | #include <sys/socket.h> |
| 27 | |
| 28 | #include <common/config.h> |
Willy Tarreau | 2386be6 | 2017-09-21 19:40:52 +0200 | [diff] [blame] | 29 | #include <common/ist.h> |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 30 | |
Willy Tarreau | d1d5454 | 2012-09-12 22:58:11 +0200 | [diff] [blame] | 31 | #include <types/listener.h> |
Willy Tarreau | 3fdb366 | 2012-11-12 00:42:33 +0100 | [diff] [blame] | 32 | #include <types/obj_type.h> |
Willy Tarreau | ef9a360 | 2012-12-08 22:29:20 +0100 | [diff] [blame] | 33 | #include <types/port_range.h> |
Willy Tarreau | d1d5454 | 2012-09-12 22:58:11 +0200 | [diff] [blame] | 34 | #include <types/protocol.h> |
| 35 | |
Willy Tarreau | d2629f2 | 2016-08-10 18:57:38 +0200 | [diff] [blame] | 36 | #include <netinet/in_systm.h> |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 37 | #include <netinet/ip.h> |
| 38 | #include <netinet/ip6.h> |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 39 | |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 40 | /* referenced below */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 41 | struct connection; |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 42 | struct conn_stream; |
Christopher Faulet | 3bc1b11 | 2018-11-29 11:29:26 +0100 | [diff] [blame] | 43 | struct cs_info; |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 44 | struct buffer; |
Willy Tarreau | 175a2bb | 2018-09-12 12:02:05 +0200 | [diff] [blame] | 45 | struct proxy; |
Willy Tarreau | d84dab7 | 2016-12-22 21:13:18 +0100 | [diff] [blame] | 46 | struct server; |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 47 | struct session; |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 48 | struct pipe; |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 49 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 50 | /* Note: subscribing to these events is only valid after the caller has really |
| 51 | * attempted to perform the operation, and failed to proceed or complete. |
| 52 | */ |
Olivier Houchard | e1c6dbc | 2018-08-01 17:06:43 +0200 | [diff] [blame] | 53 | enum sub_event_type { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 54 | SUB_RETRY_RECV = 0x00000001, /* Schedule the tasklet when we can attempt to recv again */ |
| 55 | SUB_RETRY_SEND = 0x00000002, /* Schedule the tasklet when we can attempt to send again */ |
| 56 | SUB_CALL_UNSUBSCRIBE = 0x00000004, /* The mux wants its unsubscribe() method to be called before destruction of the underlying object */ |
Olivier Houchard | e1c6dbc | 2018-08-01 17:06:43 +0200 | [diff] [blame] | 57 | }; |
| 58 | |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 59 | struct wait_event { |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 60 | struct tasklet *task; |
Olivier Houchard | cb1f49f | 2018-08-31 17:43:32 +0200 | [diff] [blame] | 61 | void *handle; /* To be used by the callee */ |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 62 | int events; /* set of enum sub_event_type above */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 63 | }; |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 64 | |
Bertrand Jacquin | d5e4de8 | 2018-10-13 16:06:18 +0100 | [diff] [blame] | 65 | /* A connection handle is how we differentiate two connections on the lower |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 66 | * layers. It usually is a file descriptor but can be a connection id. |
| 67 | */ |
| 68 | union conn_handle { |
| 69 | int fd; /* file descriptor, for regular sockets */ |
| 70 | }; |
| 71 | |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 72 | /* conn_stream flags */ |
| 73 | enum { |
| 74 | CS_FL_NONE = 0x00000000, /* Just for initialization purposes */ |
Willy Tarreau | 79dadb5 | 2017-10-05 15:06:07 +0200 | [diff] [blame] | 75 | CS_FL_SHRD = 0x00000010, /* read shut, draining extra data */ |
| 76 | CS_FL_SHRR = 0x00000020, /* read shut, resetting extra data */ |
| 77 | CS_FL_SHR = CS_FL_SHRD | CS_FL_SHRR, /* read shut status */ |
| 78 | |
| 79 | CS_FL_SHWN = 0x00000040, /* write shut, verbose mode */ |
| 80 | CS_FL_SHWS = 0x00000080, /* write shut, silent mode */ |
| 81 | CS_FL_SHW = CS_FL_SHWN | CS_FL_SHWS, /* write shut status */ |
| 82 | |
| 83 | |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 84 | CS_FL_ERROR = 0x00000100, /* a fatal error was reported */ |
Olivier Houchard | d247be0 | 2018-12-06 16:22:29 +0100 | [diff] [blame] | 85 | CS_FL_RCV_MORE = 0x00000200, /* We may have more bytes to transfert */ |
| 86 | CS_FL_WANT_ROOM = 0x00000400, /* More bytes to transfert, but not enough room */ |
Olivier Houchard | 71748cb | 2018-12-17 14:16:46 +0100 | [diff] [blame] | 87 | CS_FL_ERR_PENDING = 0x00000800, /* An error is pending, but there's still data to be read */ |
Willy Tarreau | a3f7efe | 2018-03-02 12:25:45 +0100 | [diff] [blame] | 88 | CS_FL_EOS = 0x00001000, /* End of stream delivered to data layer */ |
| 89 | CS_FL_REOS = 0x00002000, /* End of stream received (buffer not empty) */ |
Olivier Houchard | 6fa63d9 | 2017-11-27 18:41:32 +0100 | [diff] [blame] | 90 | CS_FL_WAIT_FOR_HS = 0x00010000, /* This stream is waiting for handhskae */ |
Christopher Faulet | 08088e7 | 2018-10-01 12:10:13 +0200 | [diff] [blame] | 91 | |
Christopher Faulet | effc375 | 2018-10-31 08:53:54 +0100 | [diff] [blame] | 92 | /* following flags are supposed to be set by the mux and read/unset by |
| 93 | * the stream-interface : |
| 94 | */ |
| 95 | CS_FL_NOT_FIRST = 0x00100000, /* this stream is not the first one */ |
Joseph Herlant | 8a95a6e | 2018-11-25 13:21:12 -0800 | [diff] [blame] | 96 | CS_FL_READ_PARTIAL = 0x00200000, /* some data were received (not necessarily xferred) */ |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 97 | }; |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 98 | |
Willy Tarreau | 79dadb5 | 2017-10-05 15:06:07 +0200 | [diff] [blame] | 99 | /* cs_shutr() modes */ |
| 100 | enum cs_shr_mode { |
| 101 | CS_SHR_DRAIN = 0, /* read shutdown, drain any extra stuff */ |
| 102 | CS_SHR_RESET = 1, /* read shutdown, reset any extra stuff */ |
| 103 | }; |
| 104 | |
| 105 | /* cs_shutw() modes */ |
| 106 | enum cs_shw_mode { |
| 107 | CS_SHW_NORMAL = 0, /* regular write shutdown */ |
| 108 | CS_SHW_SILENT = 1, /* imminent close, don't notify peer */ |
| 109 | }; |
| 110 | |
Willy Tarreau | baf5b9b | 2014-01-23 15:26:18 +0100 | [diff] [blame] | 111 | /* For each direction, we have a CO_FL_{SOCK,DATA}_<DIR>_ENA flag, which |
| 112 | * indicates if read or write is desired in that direction for the respective |
| 113 | * layers. The current status corresponding to the current layer being used is |
| 114 | * remembered in the CO_FL_CURR_<DIR>_ENA flag. The need to poll (ie receipt of |
| 115 | * EAGAIN) is remembered at the file descriptor level so that even when the |
| 116 | * activity is stopped and restarted, we still remember whether it was needed |
| 117 | * to poll before attempting the I/O. |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 118 | * |
Willy Tarreau | baf5b9b | 2014-01-23 15:26:18 +0100 | [diff] [blame] | 119 | * The CO_FL_CURR_<DIR>_ENA flag is set from the FD status in |
| 120 | * conn_refresh_polling_flags(). The FD state is updated according to these |
| 121 | * flags in conn_cond_update_polling(). |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 122 | */ |
| 123 | |
Willy Tarreau | 900bc93 | 2012-07-06 09:52:14 +0200 | [diff] [blame] | 124 | /* flags for use in connection->flags */ |
| 125 | enum { |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 126 | CO_FL_NONE = 0x00000000, /* Just for initialization purposes */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 127 | |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 128 | /* Do not change these values without updating conn_*_poll_changes() ! */ |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 129 | CO_FL_SOCK_RD_ENA = 0x00000001, /* receiving handshakes is allowed */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 130 | CO_FL_XPRT_RD_ENA = 0x00000002, /* receiving data is allowed */ |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 131 | CO_FL_CURR_RD_ENA = 0x00000004, /* receiving is currently allowed */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 132 | /* unused : 0x00000008 */ |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 133 | |
| 134 | CO_FL_SOCK_WR_ENA = 0x00000010, /* sending handshakes is desired */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 135 | CO_FL_XPRT_WR_ENA = 0x00000020, /* sending data is desired */ |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 136 | CO_FL_CURR_WR_ENA = 0x00000040, /* sending is currently desired */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 137 | /* unused : 0x00000080 */ |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 138 | |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 139 | /* These flags indicate whether the Control and Transport layers are initialized */ |
| 140 | CO_FL_CTRL_READY = 0x00000100, /* FD was registered, fd_delete() needed */ |
| 141 | CO_FL_XPRT_READY = 0x00000200, /* xprt_init() done, xprt_close() needed */ |
| 142 | |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 143 | CO_FL_WILL_UPDATE = 0x00000400, /* the conn handler will take care of updating the polling */ |
Willy Tarreau | 2686dca | 2017-04-26 16:25:12 +0200 | [diff] [blame] | 144 | |
| 145 | /* This flag is used by data layers to indicate they had to stop |
| 146 | * receiving data because a buffer was full. The connection handler |
| 147 | * clears it before first calling the I/O and data callbacks. |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 148 | */ |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 149 | CO_FL_WAIT_ROOM = 0x00000800, /* data sink is full */ |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 150 | |
Willy Tarreau | 986a9d2 | 2012-08-30 21:11:38 +0200 | [diff] [blame] | 151 | /* These flags are used to report whether the from/to addresses are set or not */ |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 152 | CO_FL_ADDR_FROM_SET = 0x00001000, /* addr.from is set */ |
| 153 | CO_FL_ADDR_TO_SET = 0x00002000, /* addr.to is set */ |
| 154 | |
Olivier Houchard | c2aae74 | 2017-09-22 18:26:28 +0200 | [diff] [blame] | 155 | CO_FL_EARLY_SSL_HS = 0x00004000, /* We have early data pending, don't start SSL handshake yet */ |
| 156 | CO_FL_EARLY_DATA = 0x00008000, /* At least some of the data are early data */ |
Willy Tarreau | bbae3f0 | 2017-08-30 09:59:52 +0200 | [diff] [blame] | 157 | /* unused : 0x00010000 */ |
| 158 | /* unused : 0x00020000 */ |
Willy Tarreau | 2ba4465 | 2012-08-20 17:30:32 +0200 | [diff] [blame] | 159 | |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 160 | /* flags used to remember what shutdown have been performed/reported */ |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 161 | CO_FL_SOCK_RD_SH = 0x00040000, /* SOCK layer was notified about shutr/read0 */ |
| 162 | CO_FL_SOCK_WR_SH = 0x00080000, /* SOCK layer asked for shutw */ |
| 163 | |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 164 | /* flags used to report connection errors or other closing conditions */ |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 165 | CO_FL_ERROR = 0x00100000, /* a fatal error was reported */ |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 166 | CO_FL_NOTIFY_DONE = 0x001C0000, /* any xprt shut/error flags above needs to be reported */ |
Willy Tarreau | 82967bf | 2017-09-20 17:46:46 +0200 | [diff] [blame] | 167 | CO_FL_NOTIFY_DATA = 0x001C0000, /* any shut/error flags above needs to be reported */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 168 | |
| 169 | /* flags used to report connection status updates */ |
| 170 | CO_FL_CONNECTED = 0x00200000, /* L4+L6 now ready ; extra handshakes may or may not exist */ |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 171 | CO_FL_WAIT_L4_CONN = 0x00400000, /* waiting for L4 to be connected */ |
| 172 | CO_FL_WAIT_L6_CONN = 0x00800000, /* waiting for L6 to be connected (eg: SSL) */ |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 173 | |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 174 | /*** All the flags below are used for connection handshakes. Any new |
| 175 | * handshake should be added after this point, and CO_FL_HANDSHAKE |
| 176 | * should be updated. |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 177 | */ |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 178 | CO_FL_SEND_PROXY = 0x01000000, /* send a valid PROXY protocol header */ |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 179 | CO_FL_SSL_WAIT_HS = 0x02000000, /* wait for an SSL handshake to complete */ |
Willy Tarreau | 5f1504f | 2012-10-04 23:55:57 +0200 | [diff] [blame] | 180 | CO_FL_ACCEPT_PROXY = 0x04000000, /* receive a valid PROXY protocol header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 181 | CO_FL_ACCEPT_CIP = 0x08000000, /* receive a valid NetScaler Client IP header */ |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 182 | |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 183 | /* below we have all handshake flags grouped into one */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 184 | CO_FL_HANDSHAKE = CO_FL_SEND_PROXY | CO_FL_SSL_WAIT_HS | CO_FL_ACCEPT_PROXY | CO_FL_ACCEPT_CIP, |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 185 | |
Willy Tarreau | f3a6d7e | 2012-10-03 20:00:18 +0200 | [diff] [blame] | 186 | /* when any of these flags is set, polling is defined by socket-layer |
| 187 | * operations, as opposed to data-layer. Transport is explicitly not |
| 188 | * mentionned here to avoid any confusion, since it can be the same |
| 189 | * as DATA or SOCK on some implementations. |
| 190 | */ |
| 191 | CO_FL_POLL_SOCK = CO_FL_HANDSHAKE | CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN, |
Willy Tarreau | 1e95491 | 2012-10-12 17:50:05 +0200 | [diff] [blame] | 192 | |
Willy Tarreau | 387ebf8 | 2015-08-04 19:24:13 +0200 | [diff] [blame] | 193 | /* This connection may not be shared between clients */ |
| 194 | CO_FL_PRIVATE = 0x10000000, |
| 195 | |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 196 | /* This flag is used to know that a PROXY protocol header was sent by the client */ |
| 197 | CO_FL_RCVD_PROXY = 0x20000000, |
| 198 | |
Olivier Houchard | a2dbeb2 | 2018-12-28 18:50:57 +0100 | [diff] [blame] | 199 | /* The connection is unused by its owner */ |
| 200 | CO_FL_SESS_IDLE = 0x40000000, |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 201 | /* unused : 0x40000000 */ |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 202 | |
Willy Tarreau | 1e95491 | 2012-10-12 17:50:05 +0200 | [diff] [blame] | 203 | /* This last flag indicates that the transport layer is used (for instance |
| 204 | * by logs) and must not be cleared yet. The last call to conn_xprt_close() |
| 205 | * must be done after clearing this flag. |
| 206 | */ |
| 207 | CO_FL_XPRT_TRACKED = 0x80000000, |
Willy Tarreau | 900bc93 | 2012-07-06 09:52:14 +0200 | [diff] [blame] | 208 | }; |
| 209 | |
Willy Tarreau | 14cba4b | 2012-11-30 17:33:05 +0100 | [diff] [blame] | 210 | |
| 211 | /* possible connection error codes */ |
| 212 | enum { |
| 213 | CO_ER_NONE, /* no error */ |
Willy Tarreau | 45b34e8 | 2014-01-24 16:06:50 +0100 | [diff] [blame] | 214 | |
| 215 | CO_ER_CONF_FDLIM, /* reached process' configured FD limitation */ |
| 216 | CO_ER_PROC_FDLIM, /* reached process' FD limitation */ |
| 217 | CO_ER_SYS_FDLIM, /* reached system's FD limitation */ |
| 218 | CO_ER_SYS_MEMLIM, /* reached system buffers limitation */ |
| 219 | CO_ER_NOPROTO, /* protocol not supported */ |
| 220 | CO_ER_SOCK_ERR, /* other socket error */ |
| 221 | |
| 222 | CO_ER_PORT_RANGE, /* source port range exhausted */ |
| 223 | CO_ER_CANT_BIND, /* can't bind to source address */ |
| 224 | CO_ER_FREE_PORTS, /* no more free ports on the system */ |
| 225 | CO_ER_ADDR_INUSE, /* local address already in use */ |
| 226 | |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 227 | CO_ER_PRX_EMPTY, /* nothing received in PROXY protocol header */ |
| 228 | CO_ER_PRX_ABORT, /* client abort during PROXY protocol header */ |
Willy Tarreau | 0af2912 | 2012-12-03 15:35:00 +0100 | [diff] [blame] | 229 | CO_ER_PRX_TIMEOUT, /* timeout while waiting for a PROXY header */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 230 | CO_ER_PRX_TRUNCATED, /* truncated PROXY protocol header */ |
| 231 | CO_ER_PRX_NOT_HDR, /* not a PROXY protocol header */ |
| 232 | CO_ER_PRX_BAD_HDR, /* bad PROXY protocol header */ |
| 233 | CO_ER_PRX_BAD_PROTO, /* unsupported protocol in PROXY header */ |
| 234 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 235 | CO_ER_CIP_EMPTY, /* nothing received in NetScaler Client IP header */ |
| 236 | CO_ER_CIP_ABORT, /* client abort during NetScaler Client IP header */ |
| 237 | CO_ER_CIP_TIMEOUT, /* timeout while waiting for a NetScaler Client IP header */ |
| 238 | CO_ER_CIP_TRUNCATED, /* truncated NetScaler Client IP header */ |
| 239 | CO_ER_CIP_BAD_MAGIC, /* bad magic number in NetScaler Client IP header */ |
| 240 | CO_ER_CIP_BAD_PROTO, /* unsupported protocol in NetScaler Client IP header */ |
| 241 | |
Willy Tarreau | 20879a0 | 2012-12-03 16:32:10 +0100 | [diff] [blame] | 242 | CO_ER_SSL_EMPTY, /* client closed during SSL handshake */ |
| 243 | CO_ER_SSL_ABORT, /* client abort during SSL handshake */ |
Willy Tarreau | 0af2912 | 2012-12-03 15:35:00 +0100 | [diff] [blame] | 244 | CO_ER_SSL_TIMEOUT, /* timeout during SSL handshake */ |
Willy Tarreau | 20879a0 | 2012-12-03 16:32:10 +0100 | [diff] [blame] | 245 | CO_ER_SSL_TOO_MANY, /* too many SSL connections */ |
| 246 | CO_ER_SSL_NO_MEM, /* no more memory to allocate an SSL connection */ |
| 247 | CO_ER_SSL_RENEG, /* forbidden client renegociation */ |
| 248 | CO_ER_SSL_CA_FAIL, /* client cert verification failed in the CA chain */ |
| 249 | CO_ER_SSL_CRT_FAIL, /* client cert verification failed on the certificate */ |
Willy Tarreau | 71d058c | 2017-07-26 20:09:56 +0200 | [diff] [blame] | 250 | CO_ER_SSL_MISMATCH, /* Server presented an SSL certificate different from the configured one */ |
| 251 | CO_ER_SSL_MISMATCH_SNI, /* Server presented an SSL certificate different from the expected one */ |
Willy Tarreau | 20879a0 | 2012-12-03 16:32:10 +0100 | [diff] [blame] | 252 | CO_ER_SSL_HANDSHAKE, /* SSL error during handshake */ |
Willy Tarreau | b396637 | 2014-04-25 18:54:29 +0200 | [diff] [blame] | 253 | CO_ER_SSL_HANDSHAKE_HB, /* SSL error during handshake with heartbeat present */ |
Willy Tarreau | f51c698 | 2014-04-25 20:02:39 +0200 | [diff] [blame] | 254 | CO_ER_SSL_KILLED_HB, /* Stopped a TLSv1 heartbeat attack (CVE-2014-0160) */ |
| 255 | CO_ER_SSL_NO_TARGET, /* unknown target (not client nor server) */ |
Olivier Houchard | 522eea7 | 2017-11-03 16:27:47 +0100 | [diff] [blame] | 256 | CO_ER_SSL_EARLY_FAILED, /* Server refused early data */ |
Willy Tarreau | 14cba4b | 2012-11-30 17:33:05 +0100 | [diff] [blame] | 257 | }; |
| 258 | |
Willy Tarreau | ef9a360 | 2012-12-08 22:29:20 +0100 | [diff] [blame] | 259 | /* source address settings for outgoing connections */ |
| 260 | enum { |
| 261 | /* Tproxy exclusive values from 0 to 7 */ |
| 262 | CO_SRC_TPROXY_ADDR = 0x0001, /* bind to this non-local address when connecting */ |
| 263 | CO_SRC_TPROXY_CIP = 0x0002, /* bind to the client's IP address when connecting */ |
| 264 | CO_SRC_TPROXY_CLI = 0x0003, /* bind to the client's IP+port when connecting */ |
| 265 | CO_SRC_TPROXY_DYN = 0x0004, /* bind to a dynamically computed non-local address */ |
| 266 | CO_SRC_TPROXY_MASK = 0x0007, /* bind to a non-local address when connecting */ |
| 267 | |
| 268 | CO_SRC_BIND = 0x0008, /* bind to a specific source address when connecting */ |
| 269 | }; |
| 270 | |
Willy Tarreau | 337ea57 | 2018-06-19 06:23:38 +0200 | [diff] [blame] | 271 | /* flags that can be passed to xprt->rcv_buf() and mux->rcv_buf() */ |
| 272 | enum { |
| 273 | CO_RFL_BUF_WET = 0x0001, /* Buffer still has some output data present */ |
Christopher Faulet | c6618d6 | 2018-10-11 15:56:04 +0200 | [diff] [blame] | 274 | CO_RFL_BUF_FLUSH = 0x0002, /* Flush mux's buffers but don't read more data */ |
Christopher Faulet | 72d9125 | 2018-10-17 11:08:23 +0200 | [diff] [blame] | 275 | CO_RFL_KEEP_RSV = 0x0004, /* Don't fill the reserved space */ |
Willy Tarreau | 337ea57 | 2018-06-19 06:23:38 +0200 | [diff] [blame] | 276 | }; |
| 277 | |
| 278 | /* flags that can be passed to xprt->snd_buf() and mux->snd_buf() */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 279 | enum { |
| 280 | CO_SFL_MSG_MORE = 0x0001, /* More data to come afterwards */ |
Willy Tarreau | 7bed945 | 2014-02-02 02:00:24 +0100 | [diff] [blame] | 281 | CO_SFL_STREAMER = 0x0002, /* Producer is continuously streaming data */ |
Willy Tarreau | 1049b1f | 2014-02-02 01:51:17 +0100 | [diff] [blame] | 282 | }; |
Willy Tarreau | ef9a360 | 2012-12-08 22:29:20 +0100 | [diff] [blame] | 283 | |
Willy Tarreau | 13e1410 | 2016-12-22 20:25:26 +0100 | [diff] [blame] | 284 | /* known transport layers (for ease of lookup) */ |
| 285 | enum { |
| 286 | XPRT_RAW = 0, |
| 287 | XPRT_SSL = 1, |
| 288 | XPRT_ENTRIES /* must be last one */ |
| 289 | }; |
| 290 | |
Willy Tarreau | 28f1cb9 | 2017-12-20 16:14:44 +0100 | [diff] [blame] | 291 | /* MUX-specific flags */ |
| 292 | enum { |
| 293 | MX_FL_NONE = 0x00000000, |
| 294 | MX_FL_CLEAN_ABRT = 0x00000001, /* abort is clearly reported as an error */ |
| 295 | }; |
| 296 | |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 297 | /* xprt_ops describes transport-layer operations for a connection. They |
| 298 | * generally run over a socket-based control layer, but not always. Some |
| 299 | * of them are used for data transfer with the upper layer (rcv_*, snd_*) |
| 300 | * and the other ones are used to setup and release the transport layer. |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 301 | */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 302 | struct xprt_ops { |
Willy Tarreau | 7f3225f | 2018-06-19 06:15:17 +0200 | [diff] [blame] | 303 | size_t (*rcv_buf)(struct connection *conn, struct buffer *buf, size_t count, int flags); /* recv callback */ |
Willy Tarreau | 787db9a | 2018-06-14 18:31:46 +0200 | [diff] [blame] | 304 | size_t (*snd_buf)(struct connection *conn, const struct buffer *buf, size_t count, int flags); /* send callback */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 305 | int (*rcv_pipe)(struct connection *conn, struct pipe *pipe, unsigned int count); /* recv-to-pipe callback */ |
| 306 | int (*snd_pipe)(struct connection *conn, struct pipe *pipe); /* send-to-pipe callback */ |
| 307 | void (*shutr)(struct connection *, int); /* shutr function */ |
| 308 | void (*shutw)(struct connection *, int); /* shutw function */ |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 309 | void (*close)(struct connection *); /* close the transport layer */ |
| 310 | int (*init)(struct connection *conn); /* initialize the transport layer */ |
Willy Tarreau | 5aacf78 | 2016-12-22 17:19:24 +0100 | [diff] [blame] | 311 | int (*prepare_bind_conf)(struct bind_conf *conf); /* prepare a whole bind_conf */ |
Willy Tarreau | fa983d3 | 2016-12-22 17:30:20 +0100 | [diff] [blame] | 312 | void (*destroy_bind_conf)(struct bind_conf *conf); /* destroy a whole bind_conf */ |
Willy Tarreau | d84dab7 | 2016-12-22 21:13:18 +0100 | [diff] [blame] | 313 | int (*prepare_srv)(struct server *srv); /* prepare a server context */ |
| 314 | void (*destroy_srv)(struct server *srv); /* destroy a server context */ |
Willy Tarreau | a9c1741 | 2016-12-04 18:42:09 +0100 | [diff] [blame] | 315 | int (*get_alpn)(const struct connection *conn, const char **str, int *len); /* get application layer name */ |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 316 | char name[8]; /* transport layer name, zero-terminated */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 317 | int (*subscribe)(struct connection *conn, int event_type, void *param); /* Subscribe to events, such as "being able to send" */ |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 318 | int (*unsubscribe)(struct connection *conn, int event_type, void *param); /* Unsubscribe to events */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 319 | }; |
| 320 | |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 321 | /* mux_ops describes the mux operations, which are to be performed at the |
| 322 | * connection level after data are exchanged with the transport layer in order |
| 323 | * to propagate them to streams. The <init> function will automatically be |
| 324 | * called once the mux is instanciated by the connection's owner at the end |
| 325 | * of a transport handshake, when it is about to transfer data and the data |
| 326 | * layer is not ready yet. |
| 327 | */ |
| 328 | struct mux_ops { |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 329 | int (*init)(struct connection *conn, struct proxy *prx, struct session *sess); /* early initialization */ |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 330 | int (*wake)(struct connection *conn); /* mux-layer callback to report activity, mandatory */ |
Willy Tarreau | 7f3225f | 2018-06-19 06:15:17 +0200 | [diff] [blame] | 331 | size_t (*rcv_buf)(struct conn_stream *cs, struct buffer *buf, size_t count, int flags); /* Called from the upper layer to get data */ |
Christopher Faulet | d44a9b3 | 2018-07-27 11:59:41 +0200 | [diff] [blame] | 332 | size_t (*snd_buf)(struct conn_stream *cs, struct buffer *buf, size_t count, int flags); /* Called from the upper layer to send data */ |
Olivier Houchard | 8e61472 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 333 | int (*rcv_pipe)(struct conn_stream *cs, struct pipe *pipe, unsigned int count); /* recv-to-pipe callback */ |
| 334 | int (*snd_pipe)(struct conn_stream *cs, struct pipe *pipe); /* send-to-pipe callback */ |
Willy Tarreau | ecdb3fe | 2017-10-05 15:25:48 +0200 | [diff] [blame] | 335 | void (*shutr)(struct conn_stream *cs, enum cs_shr_mode); /* shutr function */ |
| 336 | void (*shutw)(struct conn_stream *cs, enum cs_shw_mode); /* shutw function */ |
Olivier Houchard | 8e61472 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 337 | |
Olivier Houchard | f502aca | 2018-12-14 19:42:40 +0100 | [diff] [blame] | 338 | struct conn_stream *(*attach)(struct connection *, struct session *sess); /* Create and attach a conn_stream to an outgoing connection */ |
Willy Tarreau | fafd398 | 2018-11-18 21:29:20 +0100 | [diff] [blame] | 339 | const struct conn_stream *(*get_first_cs)(const struct connection *); /* retrieves any valid conn_stream from this connection */ |
Olivier Houchard | 8e61472 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 340 | void (*detach)(struct conn_stream *); /* Detach a conn_stream from an outgoing connection, when the request is done */ |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 341 | void (*show_fd)(struct buffer *, struct connection *); /* append some data about connection into chunk for "show fd" */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 342 | int (*subscribe)(struct conn_stream *cs, int event_type, void *param); /* Subscribe to events, such as "being able to send" */ |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 343 | int (*unsubscribe)(struct conn_stream *cs, int event_type, void *param); /* Unsubscribe to events */ |
Olivier Houchard | d540b36 | 2018-11-05 18:37:53 +0100 | [diff] [blame] | 344 | int (*avail_streams)(struct connection *conn); /* Returns the number of streams still available for a connection */ |
Olivier Houchard | 8defe4b | 2018-12-02 01:31:17 +0100 | [diff] [blame] | 345 | int (*max_streams)(struct connection *conn); /* Returns the max number of streams available for that connection. */ |
Olivier Houchard | 060ed43 | 2018-11-06 16:32:42 +0100 | [diff] [blame] | 346 | void (*destroy)(struct connection *conn); /* Let the mux know one of its users left, so it may have to disappear */ |
Olivier Houchard | 9a86fcb | 2018-12-11 16:47:14 +0100 | [diff] [blame] | 347 | void (*reset)(struct connection *conn); /* Reset the mux, because we're re-trying to connect */ |
Christopher Faulet | 3bc1b11 | 2018-11-29 11:29:26 +0100 | [diff] [blame] | 348 | const struct cs_info *(*get_cs_info)(struct conn_stream *cs); /* Return info on the specified conn_stream or NULL if not defined */ |
Willy Tarreau | 28f1cb9 | 2017-12-20 16:14:44 +0100 | [diff] [blame] | 349 | unsigned int flags; /* some flags characterizing the mux's capabilities (MX_FL_*) */ |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 350 | char name[8]; /* mux layer name, zero-terminated */ |
| 351 | }; |
| 352 | |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 353 | /* data_cb describes the data layer's recv and send callbacks which are called |
Willy Tarreau | f7bc57c | 2012-10-03 00:19:48 +0200 | [diff] [blame] | 354 | * when I/O activity was detected after the transport layer is ready. These |
| 355 | * callbacks are supposed to make use of the xprt_ops above to exchange data |
Willy Tarreau | 4aa3683 | 2012-10-02 20:07:22 +0200 | [diff] [blame] | 356 | * from/to buffers and pipes. The <wake> callback is used to report activity |
| 357 | * at the transport layer, which can be a connection opening/close, or any |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 358 | * data movement. It may abort a connection by returning < 0. |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 359 | */ |
Willy Tarreau | 74beec3 | 2012-10-03 00:41:04 +0200 | [diff] [blame] | 360 | struct data_cb { |
Olivier Houchard | 9aaf778 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 361 | int (*wake)(struct conn_stream *cs); /* data-layer callback to report activity */ |
Willy Tarreau | 8e0bb0a | 2016-11-24 16:58:12 +0100 | [diff] [blame] | 362 | char name[8]; /* data layer name, zero-terminated */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 363 | }; |
| 364 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 365 | struct my_tcphdr { |
David Carlier | 327298c | 2016-11-20 10:42:38 +0000 | [diff] [blame] | 366 | uint16_t source; |
| 367 | uint16_t dest; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 368 | }; |
| 369 | |
Willy Tarreau | ef9a360 | 2012-12-08 22:29:20 +0100 | [diff] [blame] | 370 | /* a connection source profile defines all the parameters needed to properly |
| 371 | * bind an outgoing connection for a server or proxy. |
| 372 | */ |
| 373 | |
| 374 | struct conn_src { |
| 375 | unsigned int opts; /* CO_SRC_* */ |
| 376 | int iface_len; /* bind interface name length */ |
| 377 | char *iface_name; /* bind interface name or NULL */ |
| 378 | struct port_range *sport_range; /* optional per-server TCP source ports */ |
| 379 | struct sockaddr_storage source_addr; /* the address to which we want to bind for connect() */ |
Willy Tarreau | 29fbe51 | 2015-08-20 19:35:14 +0200 | [diff] [blame] | 380 | #if defined(CONFIG_HAP_TRANSPARENT) |
Willy Tarreau | ef9a360 | 2012-12-08 22:29:20 +0100 | [diff] [blame] | 381 | struct sockaddr_storage tproxy_addr; /* non-local address we want to bind to for connect() */ |
| 382 | char *bind_hdr_name; /* bind to this header name if defined */ |
| 383 | int bind_hdr_len; /* length of the name of the header above */ |
| 384 | int bind_hdr_occ; /* occurrence number of header above: >0 = from first, <0 = from end, 0=disabled */ |
| 385 | #endif |
| 386 | }; |
| 387 | |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 388 | /* |
| 389 | * This structure describes the elements of a connection relevant to a stream |
| 390 | */ |
| 391 | struct conn_stream { |
| 392 | enum obj_type obj_type; /* differentiates connection from applet context */ |
Willy Tarreau | 5e1cc5e | 2018-03-02 10:43:58 +0100 | [diff] [blame] | 393 | /* 3 bytes hole here */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 394 | unsigned int flags; /* CS_FL_* */ |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 395 | struct connection *conn; /* xprt-level connection */ |
Olivier Houchard | e2b40b9 | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 396 | void *data; /* pointer to upper layer's entity (eg: stream interface) */ |
| 397 | const struct data_cb *data_cb; /* data layer callbacks. Must be set before xprt->init() */ |
| 398 | void *ctx; /* mux-specific context */ |
| 399 | }; |
| 400 | |
Christopher Faulet | 3bc1b11 | 2018-11-29 11:29:26 +0100 | [diff] [blame] | 401 | /* |
| 402 | * This structure describes the info related to a conn_stream known by the mux |
| 403 | * only but usefull for the upper layer. |
| 404 | * For now, only some dates and durations are reported. This structure will |
| 405 | * envolved. But for now, only the bare minimum is referenced. |
| 406 | */ |
| 407 | struct cs_info { |
| 408 | struct timeval create_date; /* Creation date of the conn_stream in user date */ |
| 409 | struct timeval tv_create; /* Creation date of the conn_stream in internal date (monotonic) */ |
| 410 | long t_handshake; /* hanshake duration, -1 if never occurs */ |
| 411 | long t_idle; /* idle duration, -1 if never occurs */ |
| 412 | }; |
| 413 | |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 414 | /* This structure describes a connection with its methods and data. |
| 415 | * A connection may be performed to proxy or server via a local or remote |
| 416 | * socket, and can also be made to an internal applet. It can support |
Willy Tarreau | 51c2184 | 2013-09-29 09:06:42 +0200 | [diff] [blame] | 417 | * several transport schemes (raw, ssl, ...). It can support several |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 418 | * connection control schemes, generally a protocol for socket-oriented |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 419 | * connections, but other methods for applets. The xprt_done_cb() callback |
| 420 | * is called once the transport layer initialization is done (success or |
| 421 | * failure). It may return < 0 to report an error and require an abort of the |
| 422 | * connection being instanciated. It must be removed once done. |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 423 | */ |
| 424 | struct connection { |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 425 | /* first cache line */ |
Willy Tarreau | 51c2184 | 2013-09-29 09:06:42 +0200 | [diff] [blame] | 426 | enum obj_type obj_type; /* differentiates connection from applet context */ |
Willy Tarreau | ad5281c | 2013-12-06 21:09:57 +0100 | [diff] [blame] | 427 | unsigned char err_code; /* CO_ER_* */ |
| 428 | signed short send_proxy_ofs; /* <0 = offset to (re)send from the end, >0 = send all */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 429 | unsigned int flags; /* CO_FL_* */ |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 430 | const struct protocol *ctrl; /* operations at the socket layer */ |
Willy Tarreau | 378e041 | 2012-10-13 14:33:58 +0200 | [diff] [blame] | 431 | const struct xprt_ops *xprt; /* operations at the transport layer */ |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 432 | const struct mux_ops *mux; /* mux layer opreations. Must be set before xprt->init() */ |
Willy Tarreau | 378e041 | 2012-10-13 14:33:58 +0200 | [diff] [blame] | 433 | void *xprt_ctx; /* general purpose pointer, initialized to NULL */ |
Willy Tarreau | 3d2ee55 | 2018-12-19 14:12:10 +0100 | [diff] [blame] | 434 | void *ctx; /* highest level context (usually the mux), initialized to NULL */ |
Olivier Houchard | f3e65b0 | 2018-12-02 00:35:08 +0100 | [diff] [blame] | 435 | void *owner; /* pointer to the owner session, or NULL */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 436 | enum obj_type *target; /* the target to connect to (server, proxy, applet, ...) */ |
| 437 | |
| 438 | /* second cache line */ |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 439 | struct wait_event *send_wait; /* Task to wake when we're ready to send */ |
| 440 | struct wait_event *recv_wait; /* Task to wake when we're ready to recv */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 441 | struct list list; /* attach point to various connection lists (idle, ...) */ |
Olivier Houchard | 00cf70f | 2018-11-30 17:24:55 +0100 | [diff] [blame] | 442 | struct list session_list; /* List of attached connections to a session */ |
Willy Tarreau | b8020ce | 2013-10-24 21:10:08 +0200 | [diff] [blame] | 443 | int xprt_st; /* transport layer state, initialized to zero */ |
Willy Tarreau | 53a4766 | 2017-08-28 10:53:00 +0200 | [diff] [blame] | 444 | int tmp_early_data; /* 1st byte of early data, if any */ |
Olivier Houchard | 90084a1 | 2017-11-23 18:21:29 +0100 | [diff] [blame] | 445 | int sent_early_data; /* Amount of early data we sent so far */ |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 446 | union conn_handle handle; /* connection handle at the socket layer */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 447 | const struct netns_entry *proxy_netns; |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 448 | int (*xprt_done_cb)(struct connection *conn); /* callback to notify of end of handshake */ |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 449 | |
| 450 | /* third cache line and beyond */ |
Willy Tarreau | 436d333 | 2017-10-08 11:16:46 +0200 | [diff] [blame] | 451 | void (*destroy_cb)(struct connection *conn); /* callback to notify of imminent death of the connection */ |
Willy Tarreau | 986a9d2 | 2012-08-30 21:11:38 +0200 | [diff] [blame] | 452 | struct { |
| 453 | struct sockaddr_storage from; /* client address, or address to spoof when connecting to the server */ |
Willy Tarreau | cd37995 | 2012-09-27 22:14:33 +0200 | [diff] [blame] | 454 | struct sockaddr_storage to; /* address reached by the client, or address to connect to */ |
Willy Tarreau | 986a9d2 | 2012-08-30 21:11:38 +0200 | [diff] [blame] | 455 | } addr; /* addresses of the remote side, client for producer and server for consumer */ |
Olivier Houchard | 006e310 | 2018-12-10 18:30:32 +0100 | [diff] [blame] | 456 | unsigned int idle_time; /* Time the connection was added to the idle list, or 0 if not in the idle list */ |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 457 | }; |
| 458 | |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 459 | /* PROTO token registration */ |
| 460 | enum proto_proxy_mode { |
| 461 | PROTO_MODE_NONE = 0, |
| 462 | PROTO_MODE_TCP = 1 << 0, // must not be changed! |
| 463 | PROTO_MODE_HTTP = 1 << 1, // must not be changed! |
Willy Tarreau | 68ad3a4 | 2018-10-22 11:49:15 +0200 | [diff] [blame] | 464 | PROTO_MODE_HTX = 1 << 2, // must not be changed! |
| 465 | PROTO_MODE_ANY = PROTO_MODE_TCP | PROTO_MODE_HTTP, // note: HTX is experimental and must not appear here |
Willy Tarreau | 2386be6 | 2017-09-21 19:40:52 +0200 | [diff] [blame] | 466 | }; |
| 467 | |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 468 | enum proto_proxy_side { |
| 469 | PROTO_SIDE_NONE = 0, |
| 470 | PROTO_SIDE_FE = 1, // same as PR_CAP_FE |
| 471 | PROTO_SIDE_BE = 2, // same as PR_CAP_BE |
| 472 | PROTO_SIDE_BOTH = PROTO_SIDE_FE | PROTO_SIDE_BE, |
Christopher Faulet | 2d5292a | 2018-03-06 14:43:47 +0100 | [diff] [blame] | 473 | }; |
| 474 | |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 475 | struct mux_proto_list { |
Willy Tarreau | 2386be6 | 2017-09-21 19:40:52 +0200 | [diff] [blame] | 476 | const struct ist token; /* token name and length. Empty is catch-all */ |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 477 | enum proto_proxy_mode mode; |
| 478 | enum proto_proxy_side side; |
Willy Tarreau | 2386be6 | 2017-09-21 19:40:52 +0200 | [diff] [blame] | 479 | const struct mux_ops *mux; |
| 480 | struct list list; |
| 481 | }; |
| 482 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 483 | /* proxy protocol v2 definitions */ |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 484 | #define PP2_SIGNATURE "\x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A" |
| 485 | #define PP2_SIGNATURE_LEN 12 |
| 486 | #define PP2_HEADER_LEN 16 |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 487 | |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 488 | /* ver_cmd byte */ |
| 489 | #define PP2_CMD_LOCAL 0x00 |
| 490 | #define PP2_CMD_PROXY 0x01 |
| 491 | #define PP2_CMD_MASK 0x0F |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 492 | |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 493 | #define PP2_VERSION 0x20 |
| 494 | #define PP2_VERSION_MASK 0xF0 |
| 495 | |
| 496 | /* fam byte */ |
| 497 | #define PP2_TRANS_UNSPEC 0x00 |
| 498 | #define PP2_TRANS_STREAM 0x01 |
| 499 | #define PP2_TRANS_DGRAM 0x02 |
| 500 | #define PP2_TRANS_MASK 0x0F |
| 501 | |
| 502 | #define PP2_FAM_UNSPEC 0x00 |
| 503 | #define PP2_FAM_INET 0x10 |
| 504 | #define PP2_FAM_INET6 0x20 |
| 505 | #define PP2_FAM_UNIX 0x30 |
| 506 | #define PP2_FAM_MASK 0xF0 |
| 507 | |
| 508 | #define PP2_ADDR_LEN_UNSPEC (0) |
| 509 | #define PP2_ADDR_LEN_INET (4 + 4 + 2 + 2) |
| 510 | #define PP2_ADDR_LEN_INET6 (16 + 16 + 2 + 2) |
| 511 | #define PP2_ADDR_LEN_UNIX (108 + 108) |
| 512 | |
| 513 | #define PP2_HDR_LEN_UNSPEC (PP2_HEADER_LEN + PP2_ADDR_LEN_UNSPEC) |
| 514 | #define PP2_HDR_LEN_INET (PP2_HEADER_LEN + PP2_ADDR_LEN_INET) |
| 515 | #define PP2_HDR_LEN_INET6 (PP2_HEADER_LEN + PP2_ADDR_LEN_INET6) |
| 516 | #define PP2_HDR_LEN_UNIX (PP2_HEADER_LEN + PP2_ADDR_LEN_UNIX) |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 517 | |
| 518 | struct proxy_hdr_v2 { |
| 519 | uint8_t sig[12]; /* hex 0D 0A 0D 0A 00 0D 0A 51 55 49 54 0A */ |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 520 | uint8_t ver_cmd; /* protocol version and command */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 521 | uint8_t fam; /* protocol family and transport */ |
| 522 | uint16_t len; /* number of following bytes part of the header */ |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 523 | union { |
| 524 | struct { /* for TCP/UDP over IPv4, len = 12 */ |
| 525 | uint32_t src_addr; |
| 526 | uint32_t dst_addr; |
| 527 | uint16_t src_port; |
| 528 | uint16_t dst_port; |
| 529 | } ip4; |
| 530 | struct { /* for TCP/UDP over IPv6, len = 36 */ |
| 531 | uint8_t src_addr[16]; |
| 532 | uint8_t dst_addr[16]; |
| 533 | uint16_t src_port; |
| 534 | uint16_t dst_port; |
| 535 | } ip6; |
| 536 | struct { /* for AF_UNIX sockets, len = 216 */ |
| 537 | uint8_t src_addr[108]; |
| 538 | uint8_t dst_addr[108]; |
| 539 | } unx; |
| 540 | } addr; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 541 | }; |
| 542 | |
Emmanuel Hocdet | 58118b4 | 2017-10-13 12:15:28 +0200 | [diff] [blame] | 543 | #define PP2_TYPE_ALPN 0x01 |
| 544 | #define PP2_TYPE_AUTHORITY 0x02 |
| 545 | #define PP2_TYPE_CRC32C 0x03 |
| 546 | #define PP2_TYPE_NOOP 0x04 |
| 547 | #define PP2_TYPE_SSL 0x20 |
| 548 | #define PP2_SUBTYPE_SSL_VERSION 0x21 |
| 549 | #define PP2_SUBTYPE_SSL_CN 0x22 |
| 550 | #define PP2_SUBTYPE_SSL_CIPHER 0x23 |
| 551 | #define PP2_SUBTYPE_SSL_SIG_ALG 0x24 |
| 552 | #define PP2_SUBTYPE_SSL_KEY_ALG 0x25 |
| 553 | #define PP2_TYPE_NETNS 0x30 |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 554 | |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 555 | #define TLV_HEADER_SIZE 3 |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 556 | struct tlv { |
| 557 | uint8_t type; |
| 558 | uint8_t length_hi; |
| 559 | uint8_t length_lo; |
| 560 | uint8_t value[0]; |
| 561 | }__attribute__((packed)); |
| 562 | |
| 563 | struct tlv_ssl { |
| 564 | struct tlv tlv; |
| 565 | uint8_t client; |
| 566 | uint32_t verify; |
| 567 | uint8_t sub_tlv[0]; |
| 568 | }__attribute__((packed)); |
| 569 | |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 570 | #define PP2_CLIENT_SSL 0x01 |
| 571 | #define PP2_CLIENT_CERT_CONN 0x02 |
| 572 | #define PP2_CLIENT_CERT_SESS 0x04 |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 573 | |
Olivier Houchard | f886e34 | 2017-04-05 22:24:59 +0200 | [diff] [blame] | 574 | |
| 575 | /* |
| 576 | * Linux seems to be able to send 253 fds per sendmsg(), not sure |
| 577 | * about the other OSes. |
| 578 | */ |
| 579 | /* Max number of file descriptors we send in one sendmsg() */ |
| 580 | #define MAX_SEND_FD 253 |
| 581 | |
Willy Tarreau | 56e9c5e | 2012-07-06 09:47:57 +0200 | [diff] [blame] | 582 | #endif /* _TYPES_CONNECTION_H */ |
| 583 | |
| 584 | /* |
| 585 | * Local variables: |
| 586 | * c-indent-level: 8 |
| 587 | * c-basic-offset: 8 |
| 588 | * End: |
| 589 | */ |