Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Connection management functions |
| 3 | * |
| 4 | * Copyright 2000-2012 Willy Tarreau <w@1wt.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 13 | #include <errno.h> |
| 14 | |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 15 | #include <common/compat.h> |
| 16 | #include <common/config.h> |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 17 | #include <common/initcall.h> |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 18 | #include <common/namespace.h> |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 19 | #include <common/hash.h> |
| 20 | #include <common/net_helper.h> |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 21 | |
Willy Tarreau | c578891 | 2012-08-24 18:12:41 +0200 | [diff] [blame] | 22 | #include <proto/connection.h> |
Willy Tarreau | dd2f85e | 2012-09-02 22:34:23 +0200 | [diff] [blame] | 23 | #include <proto/fd.h> |
Willy Tarreau | 5f1504f | 2012-10-04 23:55:57 +0200 | [diff] [blame] | 24 | #include <proto/frontend.h> |
Willy Tarreau | 2da156f | 2012-07-23 15:07:23 +0200 | [diff] [blame] | 25 | #include <proto/proto_tcp.h> |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 26 | #include <proto/stream_interface.h> |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 27 | #include <proto/sample.h> |
Emeric Brun | 4659195 | 2012-05-18 15:47:34 +0200 | [diff] [blame] | 28 | #include <proto/ssl_sock.h> |
Emeric Brun | 4659195 | 2012-05-18 15:47:34 +0200 | [diff] [blame] | 29 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 30 | #include <common/debug.h> |
| 31 | |
Willy Tarreau | 8ceae72 | 2018-11-26 11:58:30 +0100 | [diff] [blame] | 32 | DECLARE_POOL(pool_head_connection, "connection", sizeof(struct connection)); |
| 33 | DECLARE_POOL(pool_head_connstream, "conn_stream", sizeof(struct conn_stream)); |
| 34 | |
Willy Tarreau | 13e1410 | 2016-12-22 20:25:26 +0100 | [diff] [blame] | 35 | struct xprt_ops *registered_xprt[XPRT_ENTRIES] = { NULL, }; |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 36 | |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 37 | /* List head of all known muxes for PROTO */ |
| 38 | struct mux_proto_list mux_proto_list = { |
| 39 | .list = LIST_HEAD_INIT(mux_proto_list.list) |
Willy Tarreau | 2386be6 | 2017-09-21 19:40:52 +0200 | [diff] [blame] | 40 | }; |
| 41 | |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 42 | /* I/O callback for fd-based connections. It calls the read/write handlers |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 43 | * provided by the connection's sock_ops, which must be valid. |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 44 | */ |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 45 | void conn_fd_handler(int fd) |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 46 | { |
Willy Tarreau | 8018471 | 2012-07-06 14:54:49 +0200 | [diff] [blame] | 47 | struct connection *conn = fdtab[fd].owner; |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 48 | unsigned int flags; |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 49 | int io_available = 0; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 50 | |
Willy Tarreau | d80cb4e | 2018-01-20 19:30:13 +0100 | [diff] [blame] | 51 | if (unlikely(!conn)) { |
| 52 | activity[tid].conn_dead++; |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 53 | return; |
Willy Tarreau | d80cb4e | 2018-01-20 19:30:13 +0100 | [diff] [blame] | 54 | } |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 55 | |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 56 | conn_refresh_polling_flags(conn); |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 57 | conn->flags |= CO_FL_WILL_UPDATE; |
| 58 | |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 59 | flags = conn->flags & ~CO_FL_ERROR; /* ensure to call the wake handler upon error */ |
Willy Tarreau | d29a066 | 2012-12-10 16:33:38 +0100 | [diff] [blame] | 60 | |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 61 | process_handshake: |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 62 | /* The handshake callbacks are called in sequence. If either of them is |
| 63 | * missing something, it must enable the required polling at the socket |
| 64 | * layer of the connection. Polling state is not guaranteed when entering |
| 65 | * these handlers, so any handshake handler which does not complete its |
Willy Tarreau | d6e999b | 2013-11-25 08:41:15 +0100 | [diff] [blame] | 66 | * work must explicitly disable events it's not interested in. Error |
| 67 | * handling is also performed here in order to reduce the number of tests |
| 68 | * around. |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 69 | */ |
Willy Tarreau | d6e999b | 2013-11-25 08:41:15 +0100 | [diff] [blame] | 70 | while (unlikely(conn->flags & (CO_FL_HANDSHAKE | CO_FL_ERROR))) { |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 71 | if (unlikely(conn->flags & CO_FL_ERROR)) |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 72 | goto leave; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 73 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 74 | if (conn->flags & CO_FL_SOCKS4_SEND) |
| 75 | if (!conn_send_socks4_proxy_request(conn)) |
| 76 | goto leave; |
| 77 | |
| 78 | if (conn->flags & CO_FL_SOCKS4_RECV) |
| 79 | if (!conn_recv_socks4_proxy_response(conn)) |
| 80 | goto leave; |
| 81 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 82 | if (conn->flags & CO_FL_ACCEPT_CIP) |
| 83 | if (!conn_recv_netscaler_cip(conn, CO_FL_ACCEPT_CIP)) |
| 84 | goto leave; |
| 85 | |
Willy Tarreau | 22cda21 | 2012-08-31 17:43:29 +0200 | [diff] [blame] | 86 | if (conn->flags & CO_FL_ACCEPT_PROXY) |
| 87 | if (!conn_recv_proxy(conn, CO_FL_ACCEPT_PROXY)) |
| 88 | goto leave; |
| 89 | |
Willy Tarreau | 57cd3e4 | 2013-10-24 22:01:26 +0200 | [diff] [blame] | 90 | if (conn->flags & CO_FL_SEND_PROXY) |
| 91 | if (!conn_si_send_proxy(conn, CO_FL_SEND_PROXY)) |
Willy Tarreau | 5f1504f | 2012-10-04 23:55:57 +0200 | [diff] [blame] | 92 | goto leave; |
Emeric Brun | 4659195 | 2012-05-18 15:47:34 +0200 | [diff] [blame] | 93 | #ifdef USE_OPENSSL |
| 94 | if (conn->flags & CO_FL_SSL_WAIT_HS) |
| 95 | if (!ssl_sock_handshake(conn, CO_FL_SSL_WAIT_HS)) |
| 96 | goto leave; |
| 97 | #endif |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 98 | } |
| 99 | |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 100 | /* Once we're purely in the data phase, we disable handshake polling */ |
| 101 | if (!(conn->flags & CO_FL_POLL_SOCK)) |
| 102 | __conn_sock_stop_both(conn); |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 103 | |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 104 | /* The connection owner might want to be notified about an end of |
| 105 | * handshake indicating the connection is ready, before we proceed with |
| 106 | * any data exchange. The callback may fail and cause the connection to |
| 107 | * be destroyed, thus we must not use it anymore and should immediately |
| 108 | * leave instead. The caller must immediately unregister itself once |
| 109 | * called. |
Willy Tarreau | 2542b53 | 2012-08-31 16:01:23 +0200 | [diff] [blame] | 110 | */ |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 111 | if (conn->xprt_done_cb && conn->xprt_done_cb(conn) < 0) |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 112 | return; |
Willy Tarreau | 2542b53 | 2012-08-31 16:01:23 +0200 | [diff] [blame] | 113 | |
Willy Tarreau | 57ec32f | 2017-04-11 19:59:33 +0200 | [diff] [blame] | 114 | if (conn->xprt && fd_send_ready(fd) && |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 115 | ((conn->flags & (CO_FL_XPRT_WR_ENA|CO_FL_ERROR|CO_FL_HANDSHAKE)) == CO_FL_XPRT_WR_ENA)) { |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 116 | /* force reporting of activity by clearing the previous flags : |
| 117 | * we'll have at least ERROR or CONNECTED at the end of an I/O, |
| 118 | * both of which will be detected below. |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 119 | */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 120 | flags = 0; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 121 | if (conn->send_wait != NULL) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 122 | conn->send_wait->events &= ~SUB_RETRY_SEND; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 123 | tasklet_wakeup(conn->send_wait->task); |
| 124 | conn->send_wait = NULL; |
| 125 | } else |
| 126 | io_available = 1; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 127 | __conn_xprt_stop_send(conn); |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 128 | } |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 129 | |
Willy Tarreau | 57ec32f | 2017-04-11 19:59:33 +0200 | [diff] [blame] | 130 | /* The data transfer starts here and stops on error and handshakes. Note |
| 131 | * that we must absolutely test conn->xprt at each step in case it suddenly |
| 132 | * changes due to a quick unexpected close(). |
| 133 | */ |
| 134 | if (conn->xprt && fd_recv_ready(fd) && |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 135 | ((conn->flags & (CO_FL_XPRT_RD_ENA|CO_FL_WAIT_ROOM|CO_FL_ERROR|CO_FL_HANDSHAKE)) == CO_FL_XPRT_RD_ENA)) { |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 136 | /* force reporting of activity by clearing the previous flags : |
| 137 | * we'll have at least ERROR or CONNECTED at the end of an I/O, |
| 138 | * both of which will be detected below. |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 139 | */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 140 | flags = 0; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 141 | if (conn->recv_wait) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 142 | conn->recv_wait->events &= ~SUB_RETRY_RECV; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 143 | tasklet_wakeup(conn->recv_wait->task); |
| 144 | conn->recv_wait = NULL; |
| 145 | } else |
| 146 | io_available = 1; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 147 | __conn_xprt_stop_recv(conn); |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 148 | } |
Willy Tarreau | 2da156f | 2012-07-23 15:07:23 +0200 | [diff] [blame] | 149 | |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 150 | /* It may happen during the data phase that a handshake is |
| 151 | * enabled again (eg: SSL) |
| 152 | */ |
Willy Tarreau | d6e999b | 2013-11-25 08:41:15 +0100 | [diff] [blame] | 153 | if (unlikely(conn->flags & (CO_FL_HANDSHAKE | CO_FL_ERROR))) |
Willy Tarreau | c76ae33 | 2012-07-12 15:32:13 +0200 | [diff] [blame] | 154 | goto process_handshake; |
| 155 | |
Willy Tarreau | fd803bb | 2014-01-20 15:13:07 +0100 | [diff] [blame] | 156 | if (unlikely(conn->flags & CO_FL_WAIT_L4_CONN)) { |
Willy Tarreau | f8deb0c | 2012-09-01 17:59:22 +0200 | [diff] [blame] | 157 | /* still waiting for a connection to establish and nothing was |
| 158 | * attempted yet to probe the connection. Then let's retry the |
| 159 | * connect(). |
Willy Tarreau | 2da156f | 2012-07-23 15:07:23 +0200 | [diff] [blame] | 160 | */ |
Willy Tarreau | 239d718 | 2012-07-23 18:53:03 +0200 | [diff] [blame] | 161 | if (!tcp_connect_probe(conn)) |
Willy Tarreau | afad0e0 | 2012-08-09 14:45:22 +0200 | [diff] [blame] | 162 | goto leave; |
Willy Tarreau | 2da156f | 2012-07-23 15:07:23 +0200 | [diff] [blame] | 163 | } |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 164 | leave: |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 165 | /* Verify if the connection just established. */ |
Willy Tarreau | 7bf3fa3 | 2017-03-14 20:19:29 +0100 | [diff] [blame] | 166 | if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED)))) |
| 167 | conn->flags |= CO_FL_CONNECTED; |
| 168 | |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 169 | /* The connection owner might want to be notified about failures to |
| 170 | * complete the handshake. The callback may fail and cause the |
| 171 | * connection to be destroyed, thus we must not use it anymore and |
| 172 | * should immediately leave instead. The caller must immediately |
| 173 | * unregister itself once called. |
| 174 | */ |
| 175 | if (((conn->flags ^ flags) & CO_FL_NOTIFY_DONE) && |
| 176 | conn->xprt_done_cb && conn->xprt_done_cb(conn) < 0) |
| 177 | return; |
| 178 | |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 179 | /* The wake callback is normally used to notify the data layer about |
| 180 | * data layer activity (successful send/recv), connection establishment, |
| 181 | * shutdown and fatal errors. We need to consider the following |
| 182 | * situations to wake up the data layer : |
| 183 | * - change among the CO_FL_NOTIFY_DATA flags : |
| 184 | * {DATA,SOCK}_{RD,WR}_SH, ERROR, |
| 185 | * - absence of any of {L4,L6}_CONN and CONNECTED, indicating the |
| 186 | * end of handshake and transition to CONNECTED |
| 187 | * - raise of CONNECTED with HANDSHAKE down |
| 188 | * - end of HANDSHAKE with CONNECTED set |
| 189 | * - regular data layer activity |
| 190 | * |
| 191 | * Note that the wake callback is allowed to release the connection and |
| 192 | * the fd (and return < 0 in this case). |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 193 | */ |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 194 | if ((io_available || (((conn->flags ^ flags) & CO_FL_NOTIFY_DATA) || |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 195 | ((flags & (CO_FL_CONNECTED|CO_FL_HANDSHAKE)) != CO_FL_CONNECTED && |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 196 | (conn->flags & (CO_FL_CONNECTED|CO_FL_HANDSHAKE)) == CO_FL_CONNECTED))) && |
Olivier Houchard | 7505f94 | 2018-08-21 18:10:44 +0200 | [diff] [blame] | 197 | conn->mux->wake && conn->mux->wake(conn) < 0) |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 198 | return; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 199 | |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 200 | /* commit polling changes */ |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 201 | conn->flags &= ~CO_FL_WILL_UPDATE; |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 202 | conn_cond_update_polling(conn); |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 203 | return; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 204 | } |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 205 | |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 206 | /* Update polling on connection <c>'s file descriptor depending on its current |
| 207 | * state as reported in the connection's CO_FL_CURR_* flags, reports of EAGAIN |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 208 | * in CO_FL_WAIT_*, and the data layer expectations indicated by CO_FL_XPRT_*. |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 209 | * The connection flags are updated with the new flags at the end of the |
Willy Tarreau | 0ffde2c | 2012-10-04 22:21:15 +0200 | [diff] [blame] | 210 | * operation. Polling is totally disabled if an error was reported. |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 211 | */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 212 | void conn_update_xprt_polling(struct connection *c) |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 213 | { |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 214 | unsigned int f = c->flags; |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 215 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 216 | if (!conn_ctrl_ready(c)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 217 | return; |
| 218 | |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 219 | /* update read status if needed */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 220 | if (unlikely((f & (CO_FL_CURR_RD_ENA|CO_FL_XPRT_RD_ENA)) == CO_FL_XPRT_RD_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 221 | fd_want_recv(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 222 | f |= CO_FL_CURR_RD_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 223 | } |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 224 | else if (unlikely((f & (CO_FL_CURR_RD_ENA|CO_FL_XPRT_RD_ENA)) == CO_FL_CURR_RD_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 225 | fd_stop_recv(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 226 | f &= ~CO_FL_CURR_RD_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 227 | } |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 228 | |
| 229 | /* update write status if needed */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 230 | if (unlikely((f & (CO_FL_CURR_WR_ENA|CO_FL_XPRT_WR_ENA)) == CO_FL_XPRT_WR_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 231 | fd_want_send(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 232 | f |= CO_FL_CURR_WR_ENA; |
| 233 | } |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 234 | else if (unlikely((f & (CO_FL_CURR_WR_ENA|CO_FL_XPRT_WR_ENA)) == CO_FL_CURR_WR_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 235 | fd_stop_send(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 236 | f &= ~CO_FL_CURR_WR_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 237 | } |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 238 | c->flags = f; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | /* Update polling on connection <c>'s file descriptor depending on its current |
| 242 | * state as reported in the connection's CO_FL_CURR_* flags, reports of EAGAIN |
| 243 | * in CO_FL_WAIT_*, and the sock layer expectations indicated by CO_FL_SOCK_*. |
| 244 | * The connection flags are updated with the new flags at the end of the |
Willy Tarreau | 0ffde2c | 2012-10-04 22:21:15 +0200 | [diff] [blame] | 245 | * operation. Polling is totally disabled if an error was reported. |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 246 | */ |
| 247 | void conn_update_sock_polling(struct connection *c) |
| 248 | { |
| 249 | unsigned int f = c->flags; |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 250 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 251 | if (!conn_ctrl_ready(c)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 252 | return; |
| 253 | |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 254 | /* update read status if needed */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 255 | if (unlikely((f & (CO_FL_CURR_RD_ENA|CO_FL_SOCK_RD_ENA)) == CO_FL_SOCK_RD_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 256 | fd_want_recv(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 257 | f |= CO_FL_CURR_RD_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 258 | } |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 259 | else if (unlikely((f & (CO_FL_CURR_RD_ENA|CO_FL_SOCK_RD_ENA)) == CO_FL_CURR_RD_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 260 | fd_stop_recv(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 261 | f &= ~CO_FL_CURR_RD_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /* update write status if needed */ |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 265 | if (unlikely((f & (CO_FL_CURR_WR_ENA|CO_FL_SOCK_WR_ENA)) == CO_FL_SOCK_WR_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 266 | fd_want_send(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 267 | f |= CO_FL_CURR_WR_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 268 | } |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 269 | else if (unlikely((f & (CO_FL_CURR_WR_ENA|CO_FL_SOCK_WR_ENA)) == CO_FL_CURR_WR_ENA)) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 270 | fd_stop_send(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 271 | f &= ~CO_FL_CURR_WR_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 272 | } |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 273 | c->flags = f; |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 274 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 275 | |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 276 | /* Send a message over an established connection. It makes use of send() and |
| 277 | * returns the same return code and errno. If the socket layer is not ready yet |
| 278 | * then -1 is returned and ENOTSOCK is set into errno. If the fd is not marked |
| 279 | * as ready, or if EAGAIN or ENOTCONN is returned, then we return 0. It returns |
| 280 | * EMSGSIZE if called with a zero length message. The purpose is to simplify |
| 281 | * some rare attempts to directly write on the socket from above the connection |
| 282 | * (typically send_proxy). In case of EAGAIN, the fd is marked as "cant_send". |
| 283 | * It automatically retries on EINTR. Other errors cause the connection to be |
| 284 | * marked as in error state. It takes similar arguments as send() except the |
| 285 | * first one which is the connection instead of the file descriptor. Note, |
| 286 | * MSG_DONTWAIT and MSG_NOSIGNAL are forced on the flags. |
| 287 | */ |
| 288 | int conn_sock_send(struct connection *conn, const void *buf, int len, int flags) |
| 289 | { |
| 290 | int ret; |
| 291 | |
| 292 | ret = -1; |
| 293 | errno = ENOTSOCK; |
| 294 | |
| 295 | if (conn->flags & CO_FL_SOCK_WR_SH) |
| 296 | goto fail; |
| 297 | |
| 298 | if (!conn_ctrl_ready(conn)) |
| 299 | goto fail; |
| 300 | |
| 301 | errno = EMSGSIZE; |
| 302 | if (!len) |
| 303 | goto fail; |
| 304 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 305 | if (!fd_send_ready(conn->handle.fd)) |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 306 | goto wait; |
| 307 | |
| 308 | do { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 309 | ret = send(conn->handle.fd, buf, len, flags | MSG_DONTWAIT | MSG_NOSIGNAL); |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 310 | } while (ret < 0 && errno == EINTR); |
| 311 | |
| 312 | |
| 313 | if (ret > 0) |
| 314 | return ret; |
| 315 | |
| 316 | if (ret == 0 || errno == EAGAIN || errno == ENOTCONN) { |
| 317 | wait: |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 318 | fd_cant_send(conn->handle.fd); |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 319 | return 0; |
| 320 | } |
| 321 | fail: |
| 322 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH | CO_FL_ERROR; |
| 323 | return ret; |
| 324 | } |
| 325 | |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 326 | int conn_unsubscribe(struct connection *conn, void *xprt_ctx, int event_type, void *param) |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 327 | { |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 328 | struct wait_event *sw; |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 329 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 330 | if (event_type & SUB_RETRY_RECV) { |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 331 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 332 | BUG_ON(conn->recv_wait != sw); |
| 333 | conn->recv_wait = NULL; |
| 334 | sw->events &= ~SUB_RETRY_RECV; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 335 | __conn_xprt_stop_recv(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 336 | } |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 337 | if (event_type & SUB_RETRY_SEND) { |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 338 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 339 | BUG_ON(conn->send_wait != sw); |
| 340 | conn->send_wait = NULL; |
| 341 | sw->events &= ~SUB_RETRY_SEND; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 342 | __conn_xprt_stop_send(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 343 | } |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 344 | conn_update_xprt_polling(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 345 | return 0; |
| 346 | } |
| 347 | |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 348 | int conn_subscribe(struct connection *conn, void *xprt_ctx, int event_type, void *param) |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 349 | { |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 350 | struct wait_event *sw; |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 351 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 352 | if (event_type & SUB_RETRY_RECV) { |
Olivier Houchard | 4cf7fb1 | 2018-08-02 19:23:05 +0200 | [diff] [blame] | 353 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 354 | BUG_ON(conn->recv_wait != NULL || (sw->events & SUB_RETRY_RECV)); |
| 355 | sw->events |= SUB_RETRY_RECV; |
| 356 | conn->recv_wait = sw; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 357 | event_type &= ~SUB_RETRY_RECV; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 358 | __conn_xprt_want_recv(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 359 | } |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 360 | if (event_type & SUB_RETRY_SEND) { |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 361 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 362 | BUG_ON(conn->send_wait != NULL || (sw->events & SUB_RETRY_SEND)); |
| 363 | sw->events |= SUB_RETRY_SEND; |
| 364 | conn->send_wait = sw; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 365 | event_type &= ~SUB_RETRY_SEND; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 366 | __conn_xprt_want_send(conn); |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 367 | } |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 368 | if (event_type != 0) |
| 369 | return (-1); |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 370 | conn_update_xprt_polling(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 371 | return 0; |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 372 | } |
| 373 | |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 374 | /* Drains possibly pending incoming data on the file descriptor attached to the |
| 375 | * connection and update the connection's flags accordingly. This is used to |
| 376 | * know whether we need to disable lingering on close. Returns non-zero if it |
| 377 | * is safe to close without disabling lingering, otherwise zero. The SOCK_RD_SH |
| 378 | * flag may also be updated if the incoming shutdown was reported by the drain() |
| 379 | * function. |
| 380 | */ |
| 381 | int conn_sock_drain(struct connection *conn) |
| 382 | { |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 383 | int turns = 2; |
| 384 | int len; |
| 385 | |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 386 | if (!conn_ctrl_ready(conn)) |
| 387 | return 1; |
| 388 | |
| 389 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) |
| 390 | return 1; |
| 391 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 392 | if (fdtab[conn->handle.fd].ev & (FD_POLL_ERR|FD_POLL_HUP)) |
| 393 | goto shut; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 394 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 395 | if (!fd_recv_ready(conn->handle.fd)) |
| 396 | return 0; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 397 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 398 | if (conn->ctrl->drain) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 399 | if (conn->ctrl->drain(conn->handle.fd) <= 0) |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 400 | return 0; |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 401 | goto shut; |
| 402 | } |
| 403 | |
| 404 | /* no drain function defined, use the generic one */ |
| 405 | |
| 406 | while (turns) { |
| 407 | #ifdef MSG_TRUNC_CLEARS_INPUT |
| 408 | len = recv(conn->handle.fd, NULL, INT_MAX, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_TRUNC); |
| 409 | if (len == -1 && errno == EFAULT) |
| 410 | #endif |
| 411 | len = recv(conn->handle.fd, trash.area, trash.size, |
| 412 | MSG_DONTWAIT | MSG_NOSIGNAL); |
| 413 | |
| 414 | if (len == 0) |
| 415 | goto shut; |
| 416 | |
| 417 | if (len < 0) { |
| 418 | if (errno == EAGAIN) { |
| 419 | /* connection not closed yet */ |
| 420 | fd_cant_recv(conn->handle.fd); |
| 421 | break; |
| 422 | } |
| 423 | if (errno == EINTR) /* oops, try again */ |
| 424 | continue; |
| 425 | /* other errors indicate a dead connection, fine. */ |
| 426 | goto shut; |
| 427 | } |
| 428 | /* OK we read some data, let's try again once */ |
| 429 | turns--; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 430 | } |
| 431 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 432 | /* some data are still present, give up */ |
| 433 | return 0; |
| 434 | |
| 435 | shut: |
| 436 | /* we're certain the connection was shut down */ |
| 437 | fdtab[conn->handle.fd].linger_risk = 0; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 438 | conn->flags |= CO_FL_SOCK_RD_SH; |
| 439 | return 1; |
| 440 | } |
| 441 | |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 442 | /* |
| 443 | * Get data length from tlv |
| 444 | */ |
| 445 | static int get_tlv_length(const struct tlv *src) |
| 446 | { |
| 447 | return (src->length_hi << 8) | src->length_lo; |
| 448 | } |
| 449 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 450 | /* This handshake handler waits a PROXY protocol header at the beginning of the |
| 451 | * raw data stream. The header looks like this : |
| 452 | * |
| 453 | * "PROXY" <SP> PROTO <SP> SRC3 <SP> DST3 <SP> SRC4 <SP> <DST4> "\r\n" |
| 454 | * |
| 455 | * There must be exactly one space between each field. Fields are : |
| 456 | * - PROTO : layer 4 protocol, which must be "TCP4" or "TCP6". |
| 457 | * - SRC3 : layer 3 (eg: IP) source address in standard text form |
| 458 | * - DST3 : layer 3 (eg: IP) destination address in standard text form |
| 459 | * - SRC4 : layer 4 (eg: TCP port) source address in standard text form |
| 460 | * - DST4 : layer 4 (eg: TCP port) destination address in standard text form |
| 461 | * |
| 462 | * This line MUST be at the beginning of the buffer and MUST NOT wrap. |
| 463 | * |
| 464 | * The header line is small and in all cases smaller than the smallest normal |
| 465 | * TCP MSS. So it MUST always be delivered as one segment, which ensures we |
| 466 | * can safely use MSG_PEEK and avoid buffering. |
| 467 | * |
| 468 | * Once the data is fetched, the values are set in the connection's address |
| 469 | * fields, and data are removed from the socket's buffer. The function returns |
| 470 | * zero if it needs to wait for more data or if it fails, or 1 if it completed |
| 471 | * and removed itself. |
| 472 | */ |
| 473 | int conn_recv_proxy(struct connection *conn, int flag) |
| 474 | { |
| 475 | char *line, *end; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 476 | struct proxy_hdr_v2 *hdr_v2; |
| 477 | const char v2sig[] = PP2_SIGNATURE; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 478 | int tlv_length = 0; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 479 | int tlv_offset = 0; |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 480 | int ret; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 481 | |
| 482 | /* we might have been called just after an asynchronous shutr */ |
| 483 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 484 | goto fail; |
| 485 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 486 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 487 | goto fail; |
| 488 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 489 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 490 | goto not_ready; |
Willy Tarreau | fd803bb | 2014-01-20 15:13:07 +0100 | [diff] [blame] | 491 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 492 | do { |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 493 | ret = recv(conn->handle.fd, trash.area, trash.size, MSG_PEEK); |
| 494 | if (ret < 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 495 | if (errno == EINTR) |
| 496 | continue; |
| 497 | if (errno == EAGAIN) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 498 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 499 | goto not_ready; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 500 | } |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 501 | goto recv_abort; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 502 | } |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 503 | trash.data = ret; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 504 | } while (0); |
| 505 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 506 | if (!trash.data) { |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 507 | /* client shutdown */ |
| 508 | conn->err_code = CO_ER_PRX_EMPTY; |
| 509 | goto fail; |
| 510 | } |
| 511 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 512 | if (trash.data < 6) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 513 | goto missing; |
| 514 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 515 | line = trash.area; |
| 516 | end = trash.area + trash.data; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 517 | |
| 518 | /* Decode a possible proxy request, fail early if it does not match */ |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 519 | if (strncmp(line, "PROXY ", 6) != 0) |
| 520 | goto not_v1; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 521 | |
| 522 | line += 6; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 523 | if (trash.data < 9) /* shortest possible line */ |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 524 | goto missing; |
| 525 | |
David CARLIER | 42ff05e | 2016-03-24 09:22:36 +0000 | [diff] [blame] | 526 | if (memcmp(line, "TCP4 ", 5) == 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 527 | u32 src3, dst3, sport, dport; |
| 528 | |
| 529 | line += 5; |
| 530 | |
| 531 | src3 = inetaddr_host_lim_ret(line, end, &line); |
| 532 | if (line == end) |
| 533 | goto missing; |
| 534 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 535 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 536 | |
| 537 | dst3 = inetaddr_host_lim_ret(line, end, &line); |
| 538 | if (line == end) |
| 539 | goto missing; |
| 540 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 541 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 542 | |
| 543 | sport = read_uint((const char **)&line, end); |
| 544 | if (line == end) |
| 545 | goto missing; |
| 546 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 547 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 548 | |
| 549 | dport = read_uint((const char **)&line, end); |
| 550 | if (line > end - 2) |
| 551 | goto missing; |
| 552 | if (*line++ != '\r') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 553 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 554 | if (*line++ != '\n') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 555 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 556 | |
| 557 | /* update the session's addresses and mark them set */ |
| 558 | ((struct sockaddr_in *)&conn->addr.from)->sin_family = AF_INET; |
| 559 | ((struct sockaddr_in *)&conn->addr.from)->sin_addr.s_addr = htonl(src3); |
| 560 | ((struct sockaddr_in *)&conn->addr.from)->sin_port = htons(sport); |
| 561 | |
| 562 | ((struct sockaddr_in *)&conn->addr.to)->sin_family = AF_INET; |
| 563 | ((struct sockaddr_in *)&conn->addr.to)->sin_addr.s_addr = htonl(dst3); |
| 564 | ((struct sockaddr_in *)&conn->addr.to)->sin_port = htons(dport); |
| 565 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 566 | } |
David CARLIER | 42ff05e | 2016-03-24 09:22:36 +0000 | [diff] [blame] | 567 | else if (memcmp(line, "TCP6 ", 5) == 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 568 | u32 sport, dport; |
| 569 | char *src_s; |
| 570 | char *dst_s, *sport_s, *dport_s; |
| 571 | struct in6_addr src3, dst3; |
| 572 | |
| 573 | line += 5; |
| 574 | |
| 575 | src_s = line; |
| 576 | dst_s = sport_s = dport_s = NULL; |
| 577 | while (1) { |
| 578 | if (line > end - 2) { |
| 579 | goto missing; |
| 580 | } |
| 581 | else if (*line == '\r') { |
| 582 | *line = 0; |
| 583 | line++; |
| 584 | if (*line++ != '\n') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 585 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 586 | break; |
| 587 | } |
| 588 | |
| 589 | if (*line == ' ') { |
| 590 | *line = 0; |
| 591 | if (!dst_s) |
| 592 | dst_s = line + 1; |
| 593 | else if (!sport_s) |
| 594 | sport_s = line + 1; |
| 595 | else if (!dport_s) |
| 596 | dport_s = line + 1; |
| 597 | } |
| 598 | line++; |
| 599 | } |
| 600 | |
| 601 | if (!dst_s || !sport_s || !dport_s) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 602 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 603 | |
| 604 | sport = read_uint((const char **)&sport_s,dport_s - 1); |
| 605 | if (*sport_s != 0) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 606 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 607 | |
| 608 | dport = read_uint((const char **)&dport_s,line - 2); |
| 609 | if (*dport_s != 0) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 610 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 611 | |
| 612 | if (inet_pton(AF_INET6, src_s, (void *)&src3) != 1) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 613 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 614 | |
| 615 | if (inet_pton(AF_INET6, dst_s, (void *)&dst3) != 1) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 616 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 617 | |
| 618 | /* update the session's addresses and mark them set */ |
| 619 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_family = AF_INET6; |
| 620 | memcpy(&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr, &src3, sizeof(struct in6_addr)); |
| 621 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_port = htons(sport); |
| 622 | |
| 623 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_family = AF_INET6; |
| 624 | memcpy(&((struct sockaddr_in6 *)&conn->addr.to)->sin6_addr, &dst3, sizeof(struct in6_addr)); |
| 625 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_port = htons(dport); |
| 626 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 627 | } |
Willy Tarreau | 4c20d29 | 2014-06-14 11:41:36 +0200 | [diff] [blame] | 628 | else if (memcmp(line, "UNKNOWN\r\n", 9) == 0) { |
| 629 | /* This can be a UNIX socket forwarded by an haproxy upstream */ |
| 630 | line += 9; |
| 631 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 632 | else { |
Willy Tarreau | 4c20d29 | 2014-06-14 11:41:36 +0200 | [diff] [blame] | 633 | /* The protocol does not match something known (TCP4/TCP6/UNKNOWN) */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 634 | conn->err_code = CO_ER_PRX_BAD_PROTO; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 635 | goto fail; |
| 636 | } |
| 637 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 638 | trash.data = line - trash.area; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 639 | goto eat_header; |
| 640 | |
| 641 | not_v1: |
| 642 | /* try PPv2 */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 643 | if (trash.data < PP2_HEADER_LEN) |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 644 | goto missing; |
| 645 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 646 | hdr_v2 = (struct proxy_hdr_v2 *) trash.area; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 647 | |
| 648 | if (memcmp(hdr_v2->sig, v2sig, PP2_SIGNATURE_LEN) != 0 || |
| 649 | (hdr_v2->ver_cmd & PP2_VERSION_MASK) != PP2_VERSION) { |
| 650 | conn->err_code = CO_ER_PRX_NOT_HDR; |
| 651 | goto fail; |
| 652 | } |
| 653 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 654 | if (trash.data < PP2_HEADER_LEN + ntohs(hdr_v2->len)) |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 655 | goto missing; |
| 656 | |
| 657 | switch (hdr_v2->ver_cmd & PP2_CMD_MASK) { |
| 658 | case 0x01: /* PROXY command */ |
| 659 | switch (hdr_v2->fam) { |
| 660 | case 0x11: /* TCPv4 */ |
KOVACS Krisztian | efd3aa9 | 2014-11-19 10:53:20 +0100 | [diff] [blame] | 661 | if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET) |
| 662 | goto bad_header; |
| 663 | |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 664 | ((struct sockaddr_in *)&conn->addr.from)->sin_family = AF_INET; |
| 665 | ((struct sockaddr_in *)&conn->addr.from)->sin_addr.s_addr = hdr_v2->addr.ip4.src_addr; |
| 666 | ((struct sockaddr_in *)&conn->addr.from)->sin_port = hdr_v2->addr.ip4.src_port; |
| 667 | ((struct sockaddr_in *)&conn->addr.to)->sin_family = AF_INET; |
| 668 | ((struct sockaddr_in *)&conn->addr.to)->sin_addr.s_addr = hdr_v2->addr.ip4.dst_addr; |
| 669 | ((struct sockaddr_in *)&conn->addr.to)->sin_port = hdr_v2->addr.ip4.dst_port; |
| 670 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 671 | tlv_offset = PP2_HEADER_LEN + PP2_ADDR_LEN_INET; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 672 | tlv_length = ntohs(hdr_v2->len) - PP2_ADDR_LEN_INET; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 673 | break; |
| 674 | case 0x21: /* TCPv6 */ |
KOVACS Krisztian | efd3aa9 | 2014-11-19 10:53:20 +0100 | [diff] [blame] | 675 | if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET6) |
| 676 | goto bad_header; |
| 677 | |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 678 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_family = AF_INET6; |
| 679 | memcpy(&((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr, hdr_v2->addr.ip6.src_addr, 16); |
| 680 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_port = hdr_v2->addr.ip6.src_port; |
| 681 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_family = AF_INET6; |
| 682 | memcpy(&((struct sockaddr_in6 *)&conn->addr.to)->sin6_addr, hdr_v2->addr.ip6.dst_addr, 16); |
| 683 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_port = hdr_v2->addr.ip6.dst_port; |
| 684 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 685 | tlv_offset = PP2_HEADER_LEN + PP2_ADDR_LEN_INET6; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 686 | tlv_length = ntohs(hdr_v2->len) - PP2_ADDR_LEN_INET6; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 687 | break; |
| 688 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 689 | |
| 690 | /* TLV parsing */ |
| 691 | if (tlv_length > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 692 | while (tlv_offset + TLV_HEADER_SIZE <= trash.data) { |
| 693 | const struct tlv *tlv_packet = (struct tlv *) &trash.area[tlv_offset]; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 694 | const int tlv_len = get_tlv_length(tlv_packet); |
| 695 | tlv_offset += tlv_len + TLV_HEADER_SIZE; |
| 696 | |
| 697 | switch (tlv_packet->type) { |
Emmanuel Hocdet | 115df3e | 2018-02-05 16:23:23 +0100 | [diff] [blame] | 698 | case PP2_TYPE_CRC32C: { |
| 699 | void *tlv_crc32c_p = (void *)tlv_packet->value; |
| 700 | uint32_t n_crc32c = ntohl(read_u32(tlv_crc32c_p)); |
| 701 | write_u32(tlv_crc32c_p, 0); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 702 | if (hash_crc32c(trash.area, PP2_HEADER_LEN + ntohs(hdr_v2->len)) != n_crc32c) |
Emmanuel Hocdet | 115df3e | 2018-02-05 16:23:23 +0100 | [diff] [blame] | 703 | goto bad_header; |
| 704 | break; |
| 705 | } |
Willy Tarreau | e573323 | 2019-05-22 19:24:06 +0200 | [diff] [blame] | 706 | #ifdef USE_NS |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 707 | case PP2_TYPE_NETNS: { |
| 708 | const struct netns_entry *ns; |
| 709 | ns = netns_store_lookup((char*)tlv_packet->value, tlv_len); |
| 710 | if (ns) |
| 711 | conn->proxy_netns = ns; |
| 712 | break; |
| 713 | } |
| 714 | #endif |
| 715 | default: |
| 716 | break; |
| 717 | } |
| 718 | } |
| 719 | } |
| 720 | |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 721 | /* unsupported protocol, keep local connection address */ |
| 722 | break; |
| 723 | case 0x00: /* LOCAL command */ |
| 724 | /* keep local connection address for LOCAL */ |
| 725 | break; |
| 726 | default: |
| 727 | goto bad_header; /* not a supported command */ |
| 728 | } |
| 729 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 730 | trash.data = PP2_HEADER_LEN + ntohs(hdr_v2->len); |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 731 | goto eat_header; |
| 732 | |
| 733 | eat_header: |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 734 | /* remove the PROXY line from the request. For this we re-read the |
| 735 | * exact line at once. If we don't get the exact same result, we |
| 736 | * fail. |
| 737 | */ |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 738 | do { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 739 | int len2 = recv(conn->handle.fd, trash.area, trash.data, 0); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 740 | if (len2 < 0 && errno == EINTR) |
| 741 | continue; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 742 | if (len2 != trash.data) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 743 | goto recv_abort; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 744 | } while (0); |
| 745 | |
| 746 | conn->flags &= ~flag; |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 747 | conn->flags |= CO_FL_RCVD_PROXY; |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 748 | __conn_sock_stop_recv(conn); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 749 | return 1; |
| 750 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 751 | not_ready: |
| 752 | __conn_sock_want_recv(conn); |
| 753 | __conn_sock_stop_send(conn); |
| 754 | return 0; |
| 755 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 756 | missing: |
| 757 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 758 | * we have not read anything. Otherwise we need to fail because we won't |
| 759 | * be able to poll anymore. |
| 760 | */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 761 | conn->err_code = CO_ER_PRX_TRUNCATED; |
| 762 | goto fail; |
| 763 | |
| 764 | bad_header: |
| 765 | /* This is not a valid proxy protocol header */ |
| 766 | conn->err_code = CO_ER_PRX_BAD_HDR; |
| 767 | goto fail; |
| 768 | |
| 769 | recv_abort: |
| 770 | conn->err_code = CO_ER_PRX_ABORT; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 771 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 772 | goto fail; |
| 773 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 774 | fail: |
Willy Tarreau | d486ef5 | 2012-12-10 17:03:52 +0100 | [diff] [blame] | 775 | __conn_sock_stop_both(conn); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 776 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 777 | return 0; |
| 778 | } |
| 779 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 780 | /* This handshake handler waits a NetScaler Client IP insertion header |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 781 | * at the beginning of the raw data stream. The header format is |
| 782 | * described in doc/netscaler-client-ip-insertion-protocol.txt |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 783 | * |
| 784 | * This line MUST be at the beginning of the buffer and MUST NOT be |
| 785 | * fragmented. |
| 786 | * |
| 787 | * The header line is small and in all cases smaller than the smallest normal |
| 788 | * TCP MSS. So it MUST always be delivered as one segment, which ensures we |
| 789 | * can safely use MSG_PEEK and avoid buffering. |
| 790 | * |
| 791 | * Once the data is fetched, the values are set in the connection's address |
| 792 | * fields, and data are removed from the socket's buffer. The function returns |
| 793 | * zero if it needs to wait for more data or if it fails, or 1 if it completed |
| 794 | * and removed itself. |
| 795 | */ |
| 796 | int conn_recv_netscaler_cip(struct connection *conn, int flag) |
| 797 | { |
| 798 | char *line; |
Bertrand Jacquin | 7d668f9 | 2017-12-13 01:23:39 +0000 | [diff] [blame] | 799 | uint32_t hdr_len; |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 800 | uint8_t ip_ver; |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 801 | int ret; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 802 | |
| 803 | /* we might have been called just after an asynchronous shutr */ |
| 804 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 805 | goto fail; |
| 806 | |
| 807 | if (!conn_ctrl_ready(conn)) |
| 808 | goto fail; |
| 809 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 810 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 811 | goto not_ready; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 812 | |
| 813 | do { |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 814 | ret = recv(conn->handle.fd, trash.area, trash.size, MSG_PEEK); |
| 815 | if (ret < 0) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 816 | if (errno == EINTR) |
| 817 | continue; |
| 818 | if (errno == EAGAIN) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 819 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 820 | goto not_ready; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 821 | } |
| 822 | goto recv_abort; |
| 823 | } |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 824 | trash.data = ret; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 825 | } while (0); |
| 826 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 827 | if (!trash.data) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 828 | /* client shutdown */ |
| 829 | conn->err_code = CO_ER_CIP_EMPTY; |
| 830 | goto fail; |
| 831 | } |
| 832 | |
| 833 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 834 | * CIP magic, header length or |
| 835 | * CIP magic, CIP length, CIP type, header length */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 836 | if (trash.data < 12) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 837 | goto missing; |
| 838 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 839 | line = trash.area; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 840 | |
| 841 | /* Decode a possible NetScaler Client IP request, fail early if |
| 842 | * it does not match */ |
Willy Tarreau | 55e0da6 | 2018-09-20 11:26:52 +0200 | [diff] [blame] | 843 | if (ntohl(*(uint32_t *)line) != __objt_listener(conn->target)->bind_conf->ns_cip_magic) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 844 | goto bad_magic; |
| 845 | |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 846 | /* Legacy CIP protocol */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 847 | if ((trash.area[8] & 0xD0) == 0x40) { |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 848 | hdr_len = ntohl(*(uint32_t *)(line+4)); |
| 849 | line += 8; |
| 850 | } |
| 851 | /* Standard CIP protocol */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 852 | else if (trash.area[8] == 0x00) { |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 853 | hdr_len = ntohs(*(uint32_t *)(line+10)); |
| 854 | line += 12; |
| 855 | } |
| 856 | /* Unknown CIP protocol */ |
| 857 | else { |
| 858 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 859 | goto fail; |
| 860 | } |
| 861 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 862 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 863 | * a minimal IP header */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 864 | if (trash.data < 20) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 865 | goto missing; |
| 866 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 867 | /* Get IP version from the first four bits */ |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 868 | ip_ver = (*line & 0xf0) >> 4; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 869 | |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 870 | if (ip_ver == 4) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 871 | struct ip *hdr_ip4; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 872 | struct my_tcphdr *hdr_tcp; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 873 | |
| 874 | hdr_ip4 = (struct ip *)line; |
| 875 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 876 | if (trash.data < 40 || trash.data < hdr_len) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 877 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 67de5a2 | 2017-12-13 01:15:05 +0000 | [diff] [blame] | 878 | * IPv4 header, TCP header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 879 | goto missing; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 880 | } |
| 881 | else if (hdr_ip4->ip_p != IPPROTO_TCP) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 882 | /* The protocol does not include a TCP header */ |
| 883 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 884 | goto fail; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 885 | } |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 886 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 887 | hdr_tcp = (struct my_tcphdr *)(line + (hdr_ip4->ip_hl * 4)); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 888 | |
| 889 | /* update the session's addresses and mark them set */ |
| 890 | ((struct sockaddr_in *)&conn->addr.from)->sin_family = AF_INET; |
| 891 | ((struct sockaddr_in *)&conn->addr.from)->sin_addr.s_addr = hdr_ip4->ip_src.s_addr; |
| 892 | ((struct sockaddr_in *)&conn->addr.from)->sin_port = hdr_tcp->source; |
| 893 | |
| 894 | ((struct sockaddr_in *)&conn->addr.to)->sin_family = AF_INET; |
| 895 | ((struct sockaddr_in *)&conn->addr.to)->sin_addr.s_addr = hdr_ip4->ip_dst.s_addr; |
| 896 | ((struct sockaddr_in *)&conn->addr.to)->sin_port = hdr_tcp->dest; |
| 897 | |
| 898 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 899 | } |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 900 | else if (ip_ver == 6) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 901 | struct ip6_hdr *hdr_ip6; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 902 | struct my_tcphdr *hdr_tcp; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 903 | |
| 904 | hdr_ip6 = (struct ip6_hdr *)line; |
| 905 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 906 | if (trash.data < 60 || trash.data < hdr_len) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 907 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 67de5a2 | 2017-12-13 01:15:05 +0000 | [diff] [blame] | 908 | * IPv6 header, TCP header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 909 | goto missing; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 910 | } |
| 911 | else if (hdr_ip6->ip6_nxt != IPPROTO_TCP) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 912 | /* The protocol does not include a TCP header */ |
| 913 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 914 | goto fail; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 915 | } |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 916 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 917 | hdr_tcp = (struct my_tcphdr *)(line + sizeof(struct ip6_hdr)); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 918 | |
| 919 | /* update the session's addresses and mark them set */ |
| 920 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_family = AF_INET6; |
| 921 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_addr = hdr_ip6->ip6_src; |
| 922 | ((struct sockaddr_in6 *)&conn->addr.from)->sin6_port = hdr_tcp->source; |
| 923 | |
| 924 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_family = AF_INET6; |
| 925 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_addr = hdr_ip6->ip6_dst; |
| 926 | ((struct sockaddr_in6 *)&conn->addr.to)->sin6_port = hdr_tcp->dest; |
| 927 | |
| 928 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 929 | } |
| 930 | else { |
| 931 | /* The protocol does not match something known (IPv4/IPv6) */ |
| 932 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 933 | goto fail; |
| 934 | } |
| 935 | |
Bertrand Jacquin | 7d668f9 | 2017-12-13 01:23:39 +0000 | [diff] [blame] | 936 | line += hdr_len; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 937 | trash.data = line - trash.area; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 938 | |
| 939 | /* remove the NetScaler Client IP header from the request. For this |
| 940 | * we re-read the exact line at once. If we don't get the exact same |
| 941 | * result, we fail. |
| 942 | */ |
| 943 | do { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 944 | int len2 = recv(conn->handle.fd, trash.area, trash.data, 0); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 945 | if (len2 < 0 && errno == EINTR) |
| 946 | continue; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 947 | if (len2 != trash.data) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 948 | goto recv_abort; |
| 949 | } while (0); |
| 950 | |
| 951 | conn->flags &= ~flag; |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 952 | __conn_sock_stop_recv(conn); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 953 | return 1; |
| 954 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 955 | not_ready: |
| 956 | __conn_sock_want_recv(conn); |
| 957 | __conn_sock_stop_send(conn); |
| 958 | return 0; |
| 959 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 960 | missing: |
| 961 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 962 | * we have not read anything. Otherwise we need to fail because we won't |
| 963 | * be able to poll anymore. |
| 964 | */ |
| 965 | conn->err_code = CO_ER_CIP_TRUNCATED; |
| 966 | goto fail; |
| 967 | |
| 968 | bad_magic: |
| 969 | conn->err_code = CO_ER_CIP_BAD_MAGIC; |
| 970 | goto fail; |
| 971 | |
| 972 | recv_abort: |
| 973 | conn->err_code = CO_ER_CIP_ABORT; |
| 974 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
| 975 | goto fail; |
| 976 | |
| 977 | fail: |
| 978 | __conn_sock_stop_both(conn); |
| 979 | conn->flags |= CO_FL_ERROR; |
| 980 | return 0; |
| 981 | } |
| 982 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 983 | |
| 984 | int conn_send_socks4_proxy_request(struct connection *conn) |
| 985 | { |
| 986 | struct socks4_request req_line; |
| 987 | |
| 988 | /* we might have been called just after an asynchronous shutw */ |
| 989 | if (conn->flags & CO_FL_SOCK_WR_SH) |
| 990 | goto out_error; |
| 991 | |
| 992 | if (!conn_ctrl_ready(conn)) |
| 993 | goto out_error; |
| 994 | |
| 995 | req_line.version = 0x04; |
| 996 | req_line.command = 0x01; |
| 997 | req_line.port = get_net_port(&(conn->addr.to)); |
| 998 | req_line.ip = is_inet_addr(&(conn->addr.to)); |
| 999 | memcpy(req_line.user_id, "HAProxy\0", 8); |
| 1000 | |
| 1001 | if (conn->send_proxy_ofs > 0) { |
| 1002 | /* |
| 1003 | * This is the first call to send the request |
| 1004 | */ |
| 1005 | conn->send_proxy_ofs = -(int)sizeof(req_line); |
| 1006 | } |
| 1007 | |
| 1008 | if (conn->send_proxy_ofs < 0) { |
| 1009 | int ret = 0; |
| 1010 | |
| 1011 | /* we are sending the socks4_req_line here. If the data layer |
| 1012 | * has a pending write, we'll also set MSG_MORE. |
| 1013 | */ |
| 1014 | ret = conn_sock_send( |
| 1015 | conn, |
| 1016 | ((char *)(&req_line)) + (sizeof(req_line)+conn->send_proxy_ofs), |
| 1017 | -conn->send_proxy_ofs, |
| 1018 | (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0); |
| 1019 | |
| 1020 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Before send remain is [%d], sent [%d]\n", |
| 1021 | conn->handle.fd, -conn->send_proxy_ofs, ret); |
| 1022 | |
| 1023 | if (ret < 0) { |
| 1024 | goto out_error; |
| 1025 | } |
| 1026 | |
| 1027 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 1028 | if (conn->send_proxy_ofs != 0) { |
| 1029 | goto out_wait; |
| 1030 | } |
| 1031 | } |
| 1032 | |
| 1033 | /* OK we've the whole request sent */ |
| 1034 | conn->flags &= ~CO_FL_SOCKS4_SEND; |
| 1035 | __conn_sock_stop_send(conn); |
| 1036 | |
| 1037 | /* The connection is ready now, simply return and let the connection |
| 1038 | * handler notify upper layers if needed. |
| 1039 | */ |
| 1040 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 1041 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 1042 | |
| 1043 | if (conn->flags & CO_FL_SEND_PROXY) { |
| 1044 | /* |
| 1045 | * Get the send_proxy_ofs ready for the send_proxy due to we are |
| 1046 | * reusing the "send_proxy_ofs", and SOCKS4 handshake should be done |
| 1047 | * before sending PROXY Protocol. |
| 1048 | */ |
| 1049 | conn->send_proxy_ofs = 1; |
| 1050 | } |
| 1051 | return 1; |
| 1052 | |
| 1053 | out_error: |
| 1054 | /* Write error on the file descriptor */ |
| 1055 | conn->flags |= CO_FL_ERROR; |
| 1056 | if (conn->err_code == CO_ER_NONE) { |
| 1057 | conn->err_code = CO_ER_SOCKS4_SEND; |
| 1058 | } |
| 1059 | return 0; |
| 1060 | |
| 1061 | out_wait: |
| 1062 | __conn_sock_stop_recv(conn); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 1063 | __conn_sock_want_send(conn); |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | int conn_recv_socks4_proxy_response(struct connection *conn) |
| 1068 | { |
| 1069 | char line[SOCKS4_HS_RSP_LEN]; |
| 1070 | int ret; |
| 1071 | |
| 1072 | /* we might have been called just after an asynchronous shutr */ |
| 1073 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 1074 | goto fail; |
| 1075 | |
| 1076 | if (!conn_ctrl_ready(conn)) |
| 1077 | goto fail; |
| 1078 | |
| 1079 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 1080 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1081 | |
| 1082 | do { |
| 1083 | /* SOCKS4 Proxy will response with 8 bytes, 0x00 | 0x5A | 0x00 0x00 | 0x00 0x00 0x00 0x00 |
| 1084 | * Try to peek into it, before all 8 bytes ready. |
| 1085 | */ |
| 1086 | ret = recv(conn->handle.fd, line, SOCKS4_HS_RSP_LEN, MSG_PEEK); |
| 1087 | |
| 1088 | if (ret == 0) { |
| 1089 | /* the socket has been closed or shutdown for send */ |
| 1090 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], errno[%d], looks like the socket has been closed or shutdown for send\n", |
| 1091 | conn->handle.fd, ret, errno); |
| 1092 | if (conn->err_code == CO_ER_NONE) { |
| 1093 | conn->err_code = CO_ER_SOCKS4_RECV; |
| 1094 | } |
| 1095 | goto fail; |
| 1096 | } |
| 1097 | |
| 1098 | if (ret > 0) { |
| 1099 | if (ret == SOCKS4_HS_RSP_LEN) { |
| 1100 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received 8 bytes, the response is [%02X|%02X|%02X %02X|%02X %02X %02X %02X]\n", |
| 1101 | conn->handle.fd, line[0], line[1], line[2], line[3], line[4], line[5], line[6], line[7]); |
| 1102 | }else{ |
| 1103 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], first byte is [%02X], last bye is [%02X]\n", conn->handle.fd, ret, line[0], line[ret-1]); |
| 1104 | } |
| 1105 | } else { |
| 1106 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], errno[%d]\n", conn->handle.fd, ret, errno); |
| 1107 | } |
| 1108 | |
| 1109 | if (ret < 0) { |
| 1110 | if (errno == EINTR) { |
| 1111 | continue; |
| 1112 | } |
| 1113 | if (errno == EAGAIN) { |
| 1114 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 1115 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1116 | } |
| 1117 | goto recv_abort; |
| 1118 | } |
| 1119 | } while (0); |
| 1120 | |
| 1121 | if (ret < SOCKS4_HS_RSP_LEN) { |
| 1122 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 1123 | * we are not able to read enough data. |
| 1124 | */ |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 1125 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | /* |
| 1129 | * Base on the SOCSK4 protocol: |
| 1130 | * |
| 1131 | * +----+----+----+----+----+----+----+----+ |
| 1132 | * | VN | CD | DSTPORT | DSTIP | |
| 1133 | * +----+----+----+----+----+----+----+----+ |
| 1134 | * # of bytes: 1 1 2 4 |
| 1135 | * VN is the version of the reply code and should be 0. CD is the result |
| 1136 | * code with one of the following values: |
| 1137 | * 90: request granted |
| 1138 | * 91: request rejected or failed |
| 1139 | * 92: request rejected becasue SOCKS server cannot connect to identd on the client |
| 1140 | * 93: request rejected because the client program and identd report different user-ids |
| 1141 | * The remaining fields are ignored. |
| 1142 | */ |
| 1143 | if (line[1] != 90) { |
| 1144 | conn->flags &= ~CO_FL_SOCKS4_RECV; |
| 1145 | |
| 1146 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: FAIL, the response is [%02X|%02X|%02X %02X|%02X %02X %02X %02X]\n", |
| 1147 | conn->handle.fd, line[0], line[1], line[2], line[3], line[4], line[5], line[6], line[7]); |
| 1148 | if (conn->err_code == CO_ER_NONE) { |
| 1149 | conn->err_code = CO_ER_SOCKS4_DENY; |
| 1150 | } |
| 1151 | goto fail; |
| 1152 | } |
| 1153 | |
| 1154 | /* remove the 8 bytes response from the stream */ |
| 1155 | do { |
| 1156 | ret = recv(conn->handle.fd, line, SOCKS4_HS_RSP_LEN, 0); |
| 1157 | if (ret < 0 && errno == EINTR) { |
| 1158 | continue; |
| 1159 | } |
| 1160 | if (ret != SOCKS4_HS_RSP_LEN) { |
| 1161 | if (conn->err_code == CO_ER_NONE) { |
| 1162 | conn->err_code = CO_ER_SOCKS4_RECV; |
| 1163 | } |
| 1164 | goto fail; |
| 1165 | } |
| 1166 | } while (0); |
| 1167 | |
| 1168 | conn->flags &= ~CO_FL_SOCKS4_RECV; |
| 1169 | return 1; |
| 1170 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame^] | 1171 | not_ready: |
| 1172 | __conn_sock_want_recv(conn); |
| 1173 | __conn_sock_stop_send(conn); |
| 1174 | return 0; |
| 1175 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1176 | recv_abort: |
| 1177 | if (conn->err_code == CO_ER_NONE) { |
| 1178 | conn->err_code = CO_ER_SOCKS4_ABORT; |
| 1179 | } |
| 1180 | conn->flags |= (CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH); |
| 1181 | goto fail; |
| 1182 | |
| 1183 | fail: |
| 1184 | __conn_sock_stop_both(conn); |
| 1185 | conn->flags |= CO_FL_ERROR; |
| 1186 | return 0; |
| 1187 | } |
| 1188 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1189 | /* Note: <remote> is explicitly allowed to be NULL */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1190 | int make_proxy_line(char *buf, int buf_len, struct server *srv, struct connection *remote) |
| 1191 | { |
| 1192 | int ret = 0; |
| 1193 | |
| 1194 | if (srv && (srv->pp_opts & SRV_PP_V2)) { |
| 1195 | ret = make_proxy_line_v2(buf, buf_len, srv, remote); |
| 1196 | } |
| 1197 | else { |
| 1198 | if (remote) |
| 1199 | ret = make_proxy_line_v1(buf, buf_len, &remote->addr.from, &remote->addr.to); |
| 1200 | else |
| 1201 | ret = make_proxy_line_v1(buf, buf_len, NULL, NULL); |
| 1202 | } |
| 1203 | |
| 1204 | return ret; |
| 1205 | } |
| 1206 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1207 | /* Makes a PROXY protocol line from the two addresses. The output is sent to |
| 1208 | * buffer <buf> for a maximum size of <buf_len> (including the trailing zero). |
| 1209 | * It returns the number of bytes composing this line (including the trailing |
| 1210 | * LF), or zero in case of failure (eg: not enough space). It supports TCP4, |
Willy Tarreau | 2e1401a | 2013-10-01 11:41:55 +0200 | [diff] [blame] | 1211 | * TCP6 and "UNKNOWN" formats. If any of <src> or <dst> is null, UNKNOWN is |
| 1212 | * emitted as well. |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1213 | */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1214 | int make_proxy_line_v1(char *buf, int buf_len, struct sockaddr_storage *src, struct sockaddr_storage *dst) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1215 | { |
| 1216 | int ret = 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1217 | char * protocol; |
| 1218 | char src_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)]; |
| 1219 | char dst_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)]; |
| 1220 | in_port_t src_port; |
| 1221 | in_port_t dst_port; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1222 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1223 | if ( !src |
| 1224 | || !dst |
| 1225 | || (src->ss_family != AF_INET && src->ss_family != AF_INET6) |
| 1226 | || (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) { |
| 1227 | /* unknown family combination */ |
| 1228 | ret = snprintf(buf, buf_len, "PROXY UNKNOWN\r\n"); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1229 | if (ret >= buf_len) |
| 1230 | return 0; |
| 1231 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1232 | return ret; |
| 1233 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1234 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1235 | /* IPv4 for both src and dst */ |
| 1236 | if (src->ss_family == AF_INET && dst->ss_family == AF_INET) { |
| 1237 | protocol = "TCP4"; |
| 1238 | if (!inet_ntop(AF_INET, &((struct sockaddr_in *)src)->sin_addr, src_str, sizeof(src_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1239 | return 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1240 | src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1241 | if (!inet_ntop(AF_INET, &((struct sockaddr_in *)dst)->sin_addr, dst_str, sizeof(dst_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1242 | return 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1243 | dst_port = ((struct sockaddr_in *)dst)->sin_port; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1244 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1245 | /* IPv6 for at least one of src and dst */ |
| 1246 | else { |
| 1247 | struct in6_addr tmp; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1248 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1249 | protocol = "TCP6"; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1250 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1251 | if (src->ss_family == AF_INET) { |
| 1252 | /* Convert src to IPv6 */ |
| 1253 | v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr); |
| 1254 | src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1255 | } |
| 1256 | else { |
| 1257 | tmp = ((struct sockaddr_in6 *)src)->sin6_addr; |
| 1258 | src_port = ((struct sockaddr_in6 *)src)->sin6_port; |
| 1259 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1260 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1261 | if (!inet_ntop(AF_INET6, &tmp, src_str, sizeof(src_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1262 | return 0; |
| 1263 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1264 | if (dst->ss_family == AF_INET) { |
| 1265 | /* Convert dst to IPv6 */ |
| 1266 | v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr); |
| 1267 | dst_port = ((struct sockaddr_in *)dst)->sin_port; |
| 1268 | } |
| 1269 | else { |
| 1270 | tmp = ((struct sockaddr_in6 *)dst)->sin6_addr; |
| 1271 | dst_port = ((struct sockaddr_in6 *)dst)->sin6_port; |
| 1272 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1273 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1274 | if (!inet_ntop(AF_INET6, &tmp, dst_str, sizeof(dst_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1275 | return 0; |
| 1276 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1277 | |
| 1278 | ret = snprintf(buf, buf_len, "PROXY %s %s %s %u %u\r\n", protocol, src_str, dst_str, ntohs(src_port), ntohs(dst_port)); |
| 1279 | if (ret >= buf_len) |
| 1280 | return 0; |
| 1281 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1282 | return ret; |
| 1283 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1284 | |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1285 | static int make_tlv(char *dest, int dest_len, char type, uint16_t length, const char *value) |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1286 | { |
| 1287 | struct tlv *tlv; |
| 1288 | |
| 1289 | if (!dest || (length + sizeof(*tlv) > dest_len)) |
| 1290 | return 0; |
| 1291 | |
| 1292 | tlv = (struct tlv *)dest; |
| 1293 | |
| 1294 | tlv->type = type; |
| 1295 | tlv->length_hi = length >> 8; |
| 1296 | tlv->length_lo = length & 0x00ff; |
| 1297 | memcpy(tlv->value, value, length); |
| 1298 | return length + sizeof(*tlv); |
| 1299 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1300 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1301 | /* Note: <remote> is explicitly allowed to be NULL */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1302 | int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connection *remote) |
| 1303 | { |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1304 | const char pp2_signature[] = PP2_SIGNATURE; |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1305 | void *tlv_crc32c_p = NULL; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1306 | int ret = 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1307 | struct proxy_hdr_v2 *hdr = (struct proxy_hdr_v2 *)buf; |
Vincent Bernat | 6e61589 | 2016-05-18 16:17:44 +0200 | [diff] [blame] | 1308 | struct sockaddr_storage null_addr = { .ss_family = 0 }; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1309 | struct sockaddr_storage *src = &null_addr; |
| 1310 | struct sockaddr_storage *dst = &null_addr; |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1311 | const char *value; |
| 1312 | int value_len; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1313 | |
| 1314 | if (buf_len < PP2_HEADER_LEN) |
| 1315 | return 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1316 | memcpy(hdr->sig, pp2_signature, PP2_SIGNATURE_LEN); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1317 | |
| 1318 | if (remote) { |
| 1319 | src = &remote->addr.from; |
| 1320 | dst = &remote->addr.to; |
| 1321 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1322 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1323 | /* At least one of src or dst is not of AF_INET or AF_INET6 */ |
| 1324 | if ( !src |
| 1325 | || !dst |
| 1326 | || (src->ss_family != AF_INET && src->ss_family != AF_INET6) |
| 1327 | || (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) { |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1328 | if (buf_len < PP2_HDR_LEN_UNSPEC) |
| 1329 | return 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1330 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_LOCAL; |
| 1331 | hdr->fam = PP2_FAM_UNSPEC | PP2_TRANS_UNSPEC; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1332 | ret = PP2_HDR_LEN_UNSPEC; |
| 1333 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1334 | else { |
| 1335 | /* IPv4 for both src and dst */ |
| 1336 | if (src->ss_family == AF_INET && dst->ss_family == AF_INET) { |
| 1337 | if (buf_len < PP2_HDR_LEN_INET) |
| 1338 | return 0; |
| 1339 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY; |
| 1340 | hdr->fam = PP2_FAM_INET | PP2_TRANS_STREAM; |
| 1341 | hdr->addr.ip4.src_addr = ((struct sockaddr_in *)src)->sin_addr.s_addr; |
| 1342 | hdr->addr.ip4.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1343 | hdr->addr.ip4.dst_addr = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
| 1344 | hdr->addr.ip4.dst_port = ((struct sockaddr_in *)dst)->sin_port; |
| 1345 | ret = PP2_HDR_LEN_INET; |
| 1346 | } |
| 1347 | /* IPv6 for at least one of src and dst */ |
| 1348 | else { |
| 1349 | struct in6_addr tmp; |
| 1350 | |
| 1351 | if (buf_len < PP2_HDR_LEN_INET6) |
| 1352 | return 0; |
| 1353 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY; |
| 1354 | hdr->fam = PP2_FAM_INET6 | PP2_TRANS_STREAM; |
| 1355 | if (src->ss_family == AF_INET) { |
| 1356 | v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr); |
| 1357 | memcpy(hdr->addr.ip6.src_addr, &tmp, 16); |
| 1358 | hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1359 | } |
| 1360 | else { |
| 1361 | memcpy(hdr->addr.ip6.src_addr, &((struct sockaddr_in6 *)src)->sin6_addr, 16); |
| 1362 | hdr->addr.ip6.src_port = ((struct sockaddr_in6 *)src)->sin6_port; |
| 1363 | } |
| 1364 | if (dst->ss_family == AF_INET) { |
| 1365 | v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr); |
| 1366 | memcpy(hdr->addr.ip6.dst_addr, &tmp, 16); |
| 1367 | hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1368 | } |
| 1369 | else { |
| 1370 | memcpy(hdr->addr.ip6.dst_addr, &((struct sockaddr_in6 *)dst)->sin6_addr, 16); |
| 1371 | hdr->addr.ip6.dst_port = ((struct sockaddr_in6 *)dst)->sin6_port; |
| 1372 | } |
| 1373 | |
| 1374 | ret = PP2_HDR_LEN_INET6; |
| 1375 | } |
| 1376 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1377 | |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1378 | if (srv->pp_opts & SRV_PP_V2_CRC32C) { |
| 1379 | uint32_t zero_crc32c = 0; |
| 1380 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1381 | return 0; |
| 1382 | tlv_crc32c_p = (void *)((struct tlv *)&buf[ret])->value; |
| 1383 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_CRC32C, sizeof(zero_crc32c), (const char *)&zero_crc32c); |
| 1384 | } |
| 1385 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1386 | if (remote && conn_get_alpn(remote, &value, &value_len)) { |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1387 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1388 | return 0; |
Emmanuel Hocdet | 571c7ac | 2017-10-31 18:24:05 +0100 | [diff] [blame] | 1389 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_ALPN, value_len, value); |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1390 | } |
| 1391 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1392 | #ifdef USE_OPENSSL |
Emmanuel Hocdet | 253c3b7 | 2018-02-01 18:29:59 +0100 | [diff] [blame] | 1393 | if (srv->pp_opts & SRV_PP_V2_AUTHORITY) { |
| 1394 | value = ssl_sock_get_sni(remote); |
| 1395 | if (value) { |
| 1396 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1397 | return 0; |
| 1398 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_AUTHORITY, strlen(value), value); |
| 1399 | } |
| 1400 | } |
| 1401 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1402 | if (srv->pp_opts & SRV_PP_V2_SSL) { |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1403 | struct tlv_ssl *tlv; |
| 1404 | int ssl_tlv_len = 0; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1405 | if ((buf_len - ret) < sizeof(struct tlv_ssl)) |
| 1406 | return 0; |
| 1407 | tlv = (struct tlv_ssl *)&buf[ret]; |
| 1408 | memset(tlv, 0, sizeof(struct tlv_ssl)); |
| 1409 | ssl_tlv_len += sizeof(struct tlv_ssl); |
| 1410 | tlv->tlv.type = PP2_TYPE_SSL; |
| 1411 | if (ssl_sock_is_ssl(remote)) { |
| 1412 | tlv->client |= PP2_CLIENT_SSL; |
Emmanuel Hocdet | 01da571 | 2017-10-13 16:59:49 +0200 | [diff] [blame] | 1413 | value = ssl_sock_get_proto_version(remote); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1414 | if (value) { |
Emmanuel Hocdet | 8c0c34b | 2018-02-28 12:02:14 +0100 | [diff] [blame] | 1415 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len-ret-ssl_tlv_len), PP2_SUBTYPE_SSL_VERSION, strlen(value), value); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1416 | } |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 1417 | if (ssl_sock_get_cert_used_sess(remote)) { |
| 1418 | tlv->client |= PP2_CLIENT_CERT_SESS; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1419 | tlv->verify = htonl(ssl_sock_get_verify_result(remote)); |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 1420 | if (ssl_sock_get_cert_used_conn(remote)) |
| 1421 | tlv->client |= PP2_CLIENT_CERT_CONN; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1422 | } |
| 1423 | if (srv->pp_opts & SRV_PP_V2_SSL_CN) { |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1424 | struct buffer *cn_trash = get_trash_chunk(); |
Willy Tarreau | 3b9a0c9 | 2014-07-19 06:37:33 +0200 | [diff] [blame] | 1425 | if (ssl_sock_get_remote_common_name(remote, cn_trash) > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1426 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_CN, |
| 1427 | cn_trash->data, |
| 1428 | cn_trash->area); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1429 | } |
| 1430 | } |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1431 | if (srv->pp_opts & SRV_PP_V2_SSL_KEY_ALG) { |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1432 | struct buffer *pkey_trash = get_trash_chunk(); |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1433 | if (ssl_sock_get_pkey_algo(remote, pkey_trash) > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1434 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_KEY_ALG, |
| 1435 | pkey_trash->data, |
| 1436 | pkey_trash->area); |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1437 | } |
| 1438 | } |
| 1439 | if (srv->pp_opts & SRV_PP_V2_SSL_SIG_ALG) { |
| 1440 | value = ssl_sock_get_cert_sig(remote); |
| 1441 | if (value) { |
| 1442 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_SIG_ALG, strlen(value), value); |
| 1443 | } |
| 1444 | } |
| 1445 | if (srv->pp_opts & SRV_PP_V2_SSL_CIPHER) { |
| 1446 | value = ssl_sock_get_cipher_name(remote); |
| 1447 | if (value) { |
| 1448 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_CIPHER, strlen(value), value); |
| 1449 | } |
| 1450 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1451 | } |
| 1452 | tlv->tlv.length_hi = (uint16_t)(ssl_tlv_len - sizeof(struct tlv)) >> 8; |
| 1453 | tlv->tlv.length_lo = (uint16_t)(ssl_tlv_len - sizeof(struct tlv)) & 0x00ff; |
| 1454 | ret += ssl_tlv_len; |
| 1455 | } |
| 1456 | #endif |
| 1457 | |
Willy Tarreau | e573323 | 2019-05-22 19:24:06 +0200 | [diff] [blame] | 1458 | #ifdef USE_NS |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1459 | if (remote && (remote->proxy_netns)) { |
| 1460 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1461 | return 0; |
Emmanuel Hocdet | 571c7ac | 2017-10-31 18:24:05 +0100 | [diff] [blame] | 1462 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_NETNS, remote->proxy_netns->name_len, remote->proxy_netns->node.key); |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1463 | } |
| 1464 | #endif |
| 1465 | |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1466 | hdr->len = htons((uint16_t)(ret - PP2_HEADER_LEN)); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1467 | |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1468 | if (tlv_crc32c_p) { |
| 1469 | write_u32(tlv_crc32c_p, htonl(hash_crc32c(buf, ret))); |
| 1470 | } |
| 1471 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1472 | return ret; |
| 1473 | } |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1474 | |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1475 | /* return the major HTTP version as 1 or 2 depending on how the request arrived |
| 1476 | * before being processed. |
| 1477 | */ |
| 1478 | static int |
| 1479 | smp_fetch_fc_http_major(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1480 | { |
Jérôme Magnin | 8657742 | 2018-12-07 09:03:11 +0100 | [diff] [blame] | 1481 | struct connection *conn = (kw[0] != 'b') ? objt_conn(smp->sess->origin) : |
| 1482 | smp->strm ? cs_conn(objt_cs(smp->strm->si[1].end)) : NULL; |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1483 | |
| 1484 | smp->data.type = SMP_T_SINT; |
| 1485 | smp->data.u.sint = (conn && strcmp(conn_get_mux_name(conn), "H2") == 0) ? 2 : 1; |
| 1486 | return 1; |
| 1487 | } |
| 1488 | |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1489 | /* fetch if the received connection used a PROXY protocol header */ |
| 1490 | int smp_fetch_fc_rcvd_proxy(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1491 | { |
| 1492 | struct connection *conn; |
| 1493 | |
| 1494 | conn = objt_conn(smp->sess->origin); |
| 1495 | if (!conn) |
| 1496 | return 0; |
| 1497 | |
| 1498 | if (!(conn->flags & CO_FL_CONNECTED)) { |
| 1499 | smp->flags |= SMP_F_MAY_CHANGE; |
| 1500 | return 0; |
| 1501 | } |
| 1502 | |
| 1503 | smp->flags = 0; |
| 1504 | smp->data.type = SMP_T_BOOL; |
| 1505 | smp->data.u.sint = (conn->flags & CO_FL_RCVD_PROXY) ? 1 : 0; |
| 1506 | |
| 1507 | return 1; |
| 1508 | } |
| 1509 | |
| 1510 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1511 | * Note: fetches that may return multiple types must be declared as the lowest |
| 1512 | * common denominator, the type that can be casted into all other ones. For |
| 1513 | * instance v4/v6 must be declared v4. |
| 1514 | */ |
| 1515 | static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, { |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1516 | { "fc_http_major", smp_fetch_fc_http_major, 0, NULL, SMP_T_SINT, SMP_USE_L4CLI }, |
Jérôme Magnin | 8657742 | 2018-12-07 09:03:11 +0100 | [diff] [blame] | 1517 | { "bc_http_major", smp_fetch_fc_http_major, 0, NULL, SMP_T_SINT, SMP_USE_L4SRV }, |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1518 | { "fc_rcvd_proxy", smp_fetch_fc_rcvd_proxy, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI }, |
| 1519 | { /* END */ }, |
| 1520 | }}; |
| 1521 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1522 | INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords); |