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)); |
Willy Tarreau | ff5d57b | 2019-07-17 18:37:02 +0200 | [diff] [blame] | 34 | DECLARE_POOL(pool_head_sockaddr, "sockaddr", sizeof(struct sockaddr_storage)); |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 35 | DECLARE_POOL(pool_head_authority, "authority", PP2_AUTHORITY_MAX); |
Willy Tarreau | 8ceae72 | 2018-11-26 11:58:30 +0100 | [diff] [blame] | 36 | |
Willy Tarreau | 13e1410 | 2016-12-22 20:25:26 +0100 | [diff] [blame] | 37 | struct xprt_ops *registered_xprt[XPRT_ENTRIES] = { NULL, }; |
Willy Tarreau | f2943dc | 2012-10-26 20:10:28 +0200 | [diff] [blame] | 38 | |
Christopher Faulet | 32f61c0 | 2018-04-10 14:33:41 +0200 | [diff] [blame] | 39 | /* List head of all known muxes for PROTO */ |
| 40 | struct mux_proto_list mux_proto_list = { |
| 41 | .list = LIST_HEAD_INIT(mux_proto_list.list) |
Willy Tarreau | 2386be6 | 2017-09-21 19:40:52 +0200 | [diff] [blame] | 42 | }; |
| 43 | |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 44 | /* 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] | 45 | * provided by the connection's sock_ops, which must be valid. |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 46 | */ |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 47 | void conn_fd_handler(int fd) |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 48 | { |
Willy Tarreau | 8018471 | 2012-07-06 14:54:49 +0200 | [diff] [blame] | 49 | struct connection *conn = fdtab[fd].owner; |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 50 | unsigned int flags; |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 51 | int io_available = 0; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 52 | |
Willy Tarreau | d80cb4e | 2018-01-20 19:30:13 +0100 | [diff] [blame] | 53 | if (unlikely(!conn)) { |
| 54 | activity[tid].conn_dead++; |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 55 | return; |
Willy Tarreau | d80cb4e | 2018-01-20 19:30:13 +0100 | [diff] [blame] | 56 | } |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 57 | |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 58 | conn_refresh_polling_flags(conn); |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 59 | conn->flags |= CO_FL_WILL_UPDATE; |
| 60 | |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 61 | 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] | 62 | |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 63 | /* The connection owner might want to be notified about an end of |
| 64 | * handshake indicating the connection is ready, before we proceed with |
| 65 | * any data exchange. The callback may fail and cause the connection to |
| 66 | * be destroyed, thus we must not use it anymore and should immediately |
| 67 | * leave instead. The caller must immediately unregister itself once |
| 68 | * called. |
Willy Tarreau | 2542b53 | 2012-08-31 16:01:23 +0200 | [diff] [blame] | 69 | */ |
Olivier Houchard | fe50bfb | 2019-05-27 12:09:19 +0200 | [diff] [blame] | 70 | if (!(conn->flags & CO_FL_HANDSHAKE) && |
Olivier Houchard | ea8dd94 | 2019-05-20 14:02:16 +0200 | [diff] [blame] | 71 | conn->xprt_done_cb && conn->xprt_done_cb(conn) < 0) |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 72 | return; |
Willy Tarreau | 2542b53 | 2012-08-31 16:01:23 +0200 | [diff] [blame] | 73 | |
Willy Tarreau | 8081abe | 2019-11-28 18:08:49 +0100 | [diff] [blame] | 74 | if (fd_send_ready(fd) && fd_send_active(fd)) { |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 75 | /* force reporting of activity by clearing the previous flags : |
| 76 | * we'll have at least ERROR or CONNECTED at the end of an I/O, |
| 77 | * both of which will be detected below. |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 78 | */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 79 | flags = 0; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 80 | if (conn->send_wait != NULL) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 81 | conn->send_wait->events &= ~SUB_RETRY_SEND; |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 82 | tasklet_wakeup(conn->send_wait->tasklet); |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 83 | conn->send_wait = NULL; |
| 84 | } else |
| 85 | io_available = 1; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 86 | __conn_xprt_stop_send(conn); |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 87 | } |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 88 | |
Willy Tarreau | ccf3f6d | 2019-09-05 17:05:05 +0200 | [diff] [blame] | 89 | if (unlikely(conn->flags & CO_FL_WAIT_L4_CONN)) { |
| 90 | /* still waiting for a connection to establish and nothing was |
| 91 | * attempted yet to probe the connection. Then let's retry the |
| 92 | * connect(). |
| 93 | */ |
Willy Tarreau | 4970e5a | 2019-12-27 10:40:21 +0100 | [diff] [blame^] | 94 | if (!conn_fd_check(conn)) |
Willy Tarreau | ccf3f6d | 2019-09-05 17:05:05 +0200 | [diff] [blame] | 95 | goto leave; |
| 96 | } |
| 97 | |
Willy Tarreau | 57ec32f | 2017-04-11 19:59:33 +0200 | [diff] [blame] | 98 | /* The data transfer starts here and stops on error and handshakes. Note |
| 99 | * that we must absolutely test conn->xprt at each step in case it suddenly |
| 100 | * changes due to a quick unexpected close(). |
| 101 | */ |
Willy Tarreau | 8081abe | 2019-11-28 18:08:49 +0100 | [diff] [blame] | 102 | if (fd_recv_ready(fd) && fd_recv_active(fd)) { |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 103 | /* force reporting of activity by clearing the previous flags : |
| 104 | * we'll have at least ERROR or CONNECTED at the end of an I/O, |
| 105 | * both of which will be detected below. |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 106 | */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 107 | flags = 0; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 108 | if (conn->recv_wait) { |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 109 | conn->recv_wait->events &= ~SUB_RETRY_RECV; |
Willy Tarreau | 3c39a7d | 2019-06-14 14:42:29 +0200 | [diff] [blame] | 110 | tasklet_wakeup(conn->recv_wait->tasklet); |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 111 | conn->recv_wait = NULL; |
| 112 | } else |
| 113 | io_available = 1; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 114 | __conn_xprt_stop_recv(conn); |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 115 | } |
Willy Tarreau | 2da156f | 2012-07-23 15:07:23 +0200 | [diff] [blame] | 116 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 117 | leave: |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 118 | /* Verify if the connection just established. */ |
Willy Tarreau | 7bf3fa3 | 2017-03-14 20:19:29 +0100 | [diff] [blame] | 119 | if (unlikely(!(conn->flags & (CO_FL_WAIT_L4_CONN | CO_FL_WAIT_L6_CONN | CO_FL_CONNECTED)))) |
| 120 | conn->flags |= CO_FL_CONNECTED; |
| 121 | |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 122 | /* The connection owner might want to be notified about failures to |
| 123 | * complete the handshake. The callback may fail and cause the |
| 124 | * connection to be destroyed, thus we must not use it anymore and |
| 125 | * should immediately leave instead. The caller must immediately |
| 126 | * unregister itself once called. |
| 127 | */ |
| 128 | if (((conn->flags ^ flags) & CO_FL_NOTIFY_DONE) && |
| 129 | conn->xprt_done_cb && conn->xprt_done_cb(conn) < 0) |
| 130 | return; |
| 131 | |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 132 | /* The wake callback is normally used to notify the data layer about |
| 133 | * data layer activity (successful send/recv), connection establishment, |
| 134 | * shutdown and fatal errors. We need to consider the following |
| 135 | * situations to wake up the data layer : |
| 136 | * - change among the CO_FL_NOTIFY_DATA flags : |
| 137 | * {DATA,SOCK}_{RD,WR}_SH, ERROR, |
| 138 | * - absence of any of {L4,L6}_CONN and CONNECTED, indicating the |
| 139 | * end of handshake and transition to CONNECTED |
| 140 | * - raise of CONNECTED with HANDSHAKE down |
| 141 | * - end of HANDSHAKE with CONNECTED set |
| 142 | * - regular data layer activity |
| 143 | * |
| 144 | * Note that the wake callback is allowed to release the connection and |
| 145 | * the fd (and return < 0 in this case). |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 146 | */ |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 147 | if ((io_available || (((conn->flags ^ flags) & CO_FL_NOTIFY_DATA) || |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 148 | ((flags & (CO_FL_CONNECTED|CO_FL_HANDSHAKE)) != CO_FL_CONNECTED && |
Olivier Houchard | 910b2bc | 2018-07-17 18:49:38 +0200 | [diff] [blame] | 149 | (conn->flags & (CO_FL_CONNECTED|CO_FL_HANDSHAKE)) == CO_FL_CONNECTED))) && |
Olivier Houchard | fe50bfb | 2019-05-27 12:09:19 +0200 | [diff] [blame] | 150 | conn->mux && conn->mux->wake && conn->mux->wake(conn) < 0) |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 151 | return; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 152 | |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 153 | /* commit polling changes */ |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 154 | conn->flags &= ~CO_FL_WILL_UPDATE; |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 155 | conn_cond_update_polling(conn); |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 156 | return; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 157 | } |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 158 | |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 159 | /* Update polling on connection <c>'s file descriptor depending on its current |
| 160 | * 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] | 161 | * 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] | 162 | * 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] | 163 | * operation. Polling is totally disabled if an error was reported. |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 164 | */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 165 | void conn_update_xprt_polling(struct connection *c) |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 166 | { |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 167 | unsigned int f = c->flags; |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 168 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 169 | if (!conn_ctrl_ready(c)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 170 | return; |
| 171 | |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 172 | /* update read status if needed */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 173 | 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] | 174 | fd_want_recv(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 175 | f |= CO_FL_CURR_RD_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 176 | } |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 177 | 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] | 178 | fd_stop_recv(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 179 | f &= ~CO_FL_CURR_RD_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 180 | } |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 181 | |
| 182 | /* update write status if needed */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 183 | 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] | 184 | fd_want_send(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 185 | f |= CO_FL_CURR_WR_ENA; |
| 186 | } |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 187 | 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] | 188 | fd_stop_send(c->handle.fd); |
Willy Tarreau | c8dd77f | 2012-11-05 17:52:26 +0100 | [diff] [blame] | 189 | f &= ~CO_FL_CURR_WR_ENA; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 190 | } |
Willy Tarreau | 310987a | 2014-01-22 19:46:33 +0100 | [diff] [blame] | 191 | c->flags = f; |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 192 | } |
| 193 | |
Willy Tarreau | 4970e5a | 2019-12-27 10:40:21 +0100 | [diff] [blame^] | 194 | /* This is the callback which is set when a connection establishment is pending |
| 195 | * and we have nothing to send. It may update the FD polling status to indicate |
| 196 | * !READY. It returns 0 if it fails in a fatal way or needs to poll to go |
| 197 | * further, otherwise it returns non-zero and removes the CO_FL_WAIT_L4_CONN |
| 198 | * flag from the connection's flags. In case of error, it sets CO_FL_ERROR and |
| 199 | * leaves the error code in errno. |
| 200 | */ |
| 201 | int conn_fd_check(struct connection *conn) |
| 202 | { |
| 203 | struct sockaddr_storage *addr; |
| 204 | int fd = conn->handle.fd; |
| 205 | |
| 206 | if (conn->flags & CO_FL_ERROR) |
| 207 | return 0; |
| 208 | |
| 209 | if (!conn_ctrl_ready(conn)) |
| 210 | return 0; |
| 211 | |
| 212 | if (!(conn->flags & CO_FL_WAIT_L4_CONN)) |
| 213 | return 1; /* strange we were called while ready */ |
| 214 | |
| 215 | if (!fd_send_ready(fd)) |
| 216 | return 0; |
| 217 | |
| 218 | /* Here we have 2 cases : |
| 219 | * - modern pollers, able to report ERR/HUP. If these ones return any |
| 220 | * of these flags then it's likely a failure, otherwise it possibly |
| 221 | * is a success (i.e. there may have been data received just before |
| 222 | * the error was reported). |
| 223 | * - select, which doesn't report these and with which it's always |
| 224 | * necessary either to try connect() again or to check for SO_ERROR. |
| 225 | * In order to simplify everything, we double-check using connect() as |
| 226 | * soon as we meet either of these delicate situations. Note that |
| 227 | * SO_ERROR would clear the error after reporting it! |
| 228 | */ |
| 229 | if (cur_poller.flags & HAP_POLL_F_ERRHUP) { |
| 230 | /* modern poller, able to report ERR/HUP */ |
| 231 | if ((fdtab[fd].ev & (FD_POLL_IN|FD_POLL_ERR|FD_POLL_HUP)) == FD_POLL_IN) |
| 232 | goto done; |
| 233 | if ((fdtab[fd].ev & (FD_POLL_OUT|FD_POLL_ERR|FD_POLL_HUP)) == FD_POLL_OUT) |
| 234 | goto done; |
| 235 | if (!(fdtab[fd].ev & (FD_POLL_ERR|FD_POLL_HUP))) |
| 236 | goto wait; |
| 237 | /* error present, fall through common error check path */ |
| 238 | } |
| 239 | |
| 240 | /* Use connect() to check the state of the socket. This has the double |
| 241 | * advantage of *not* clearing the error (so that health checks can |
| 242 | * still use getsockopt(SO_ERROR)) and giving us the following info : |
| 243 | * - error |
| 244 | * - connecting (EALREADY, EINPROGRESS) |
| 245 | * - connected (EISCONN, 0) |
| 246 | */ |
| 247 | addr = conn->dst; |
| 248 | if ((conn->flags & CO_FL_SOCKS4) && obj_type(conn->target) == OBJ_TYPE_SERVER) |
| 249 | addr = &objt_server(conn->target)->socks4_addr; |
| 250 | |
| 251 | if (connect(fd, (const struct sockaddr *)addr, get_addr_len(addr)) == -1) { |
| 252 | if (errno == EALREADY || errno == EINPROGRESS) |
| 253 | goto wait; |
| 254 | |
| 255 | if (errno && errno != EISCONN) |
| 256 | goto out_error; |
| 257 | } |
| 258 | |
| 259 | done: |
| 260 | /* The FD is ready now, we'll mark the connection as complete and |
| 261 | * forward the event to the transport layer which will notify the |
| 262 | * data layer. |
| 263 | */ |
| 264 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 265 | fd_may_send(fd); |
| 266 | fd_cond_recv(fd); |
| 267 | errno = 0; // make health checks happy |
| 268 | return 1; |
| 269 | |
| 270 | out_error: |
| 271 | /* Write error on the file descriptor. Report it to the connection |
| 272 | * and disable polling on this FD. |
| 273 | */ |
| 274 | fdtab[fd].linger_risk = 0; |
| 275 | conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
| 276 | __conn_xprt_stop_both(conn); |
| 277 | return 0; |
| 278 | |
| 279 | wait: |
| 280 | __conn_xprt_want_send(conn); |
| 281 | fd_cant_send(fd); |
| 282 | return 0; |
| 283 | } |
| 284 | |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 285 | /* Send a message over an established connection. It makes use of send() and |
| 286 | * returns the same return code and errno. If the socket layer is not ready yet |
| 287 | * then -1 is returned and ENOTSOCK is set into errno. If the fd is not marked |
| 288 | * as ready, or if EAGAIN or ENOTCONN is returned, then we return 0. It returns |
| 289 | * EMSGSIZE if called with a zero length message. The purpose is to simplify |
| 290 | * some rare attempts to directly write on the socket from above the connection |
| 291 | * (typically send_proxy). In case of EAGAIN, the fd is marked as "cant_send". |
| 292 | * It automatically retries on EINTR. Other errors cause the connection to be |
| 293 | * marked as in error state. It takes similar arguments as send() except the |
| 294 | * first one which is the connection instead of the file descriptor. Note, |
| 295 | * MSG_DONTWAIT and MSG_NOSIGNAL are forced on the flags. |
| 296 | */ |
| 297 | int conn_sock_send(struct connection *conn, const void *buf, int len, int flags) |
| 298 | { |
| 299 | int ret; |
| 300 | |
| 301 | ret = -1; |
| 302 | errno = ENOTSOCK; |
| 303 | |
| 304 | if (conn->flags & CO_FL_SOCK_WR_SH) |
| 305 | goto fail; |
| 306 | |
| 307 | if (!conn_ctrl_ready(conn)) |
| 308 | goto fail; |
| 309 | |
| 310 | errno = EMSGSIZE; |
| 311 | if (!len) |
| 312 | goto fail; |
| 313 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 314 | if (!fd_send_ready(conn->handle.fd)) |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 315 | goto wait; |
| 316 | |
| 317 | do { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 318 | ret = send(conn->handle.fd, buf, len, flags | MSG_DONTWAIT | MSG_NOSIGNAL); |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 319 | } while (ret < 0 && errno == EINTR); |
| 320 | |
| 321 | |
Willy Tarreau | ccf3f6d | 2019-09-05 17:05:05 +0200 | [diff] [blame] | 322 | if (ret > 0) { |
| 323 | if (conn->flags & CO_FL_WAIT_L4_CONN) { |
| 324 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 325 | fd_may_send(conn->handle.fd); |
| 326 | fd_cond_recv(conn->handle.fd); |
| 327 | } |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 328 | return ret; |
Willy Tarreau | ccf3f6d | 2019-09-05 17:05:05 +0200 | [diff] [blame] | 329 | } |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 330 | |
| 331 | if (ret == 0 || errno == EAGAIN || errno == ENOTCONN) { |
| 332 | wait: |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 333 | fd_cant_send(conn->handle.fd); |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 334 | return 0; |
| 335 | } |
| 336 | fail: |
| 337 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH | CO_FL_ERROR; |
| 338 | return ret; |
| 339 | } |
| 340 | |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 341 | 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] | 342 | { |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 343 | struct wait_event *sw; |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 344 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 345 | if (event_type & SUB_RETRY_RECV) { |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 346 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 347 | BUG_ON(conn->recv_wait != sw); |
| 348 | conn->recv_wait = NULL; |
| 349 | sw->events &= ~SUB_RETRY_RECV; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 350 | __conn_xprt_stop_recv(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 351 | } |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 352 | if (event_type & SUB_RETRY_SEND) { |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 353 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 354 | BUG_ON(conn->send_wait != sw); |
| 355 | conn->send_wait = NULL; |
| 356 | sw->events &= ~SUB_RETRY_SEND; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 357 | __conn_xprt_stop_send(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 358 | } |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 359 | conn_update_xprt_polling(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 360 | return 0; |
| 361 | } |
| 362 | |
Olivier Houchard | e179d0e | 2019-03-21 18:27:17 +0100 | [diff] [blame] | 363 | 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] | 364 | { |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 365 | struct wait_event *sw; |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 366 | |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 367 | if (event_type & SUB_RETRY_RECV) { |
Olivier Houchard | 4cf7fb1 | 2018-08-02 19:23:05 +0200 | [diff] [blame] | 368 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 369 | BUG_ON(conn->recv_wait != NULL || (sw->events & SUB_RETRY_RECV)); |
| 370 | sw->events |= SUB_RETRY_RECV; |
| 371 | conn->recv_wait = sw; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 372 | event_type &= ~SUB_RETRY_RECV; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 373 | __conn_xprt_want_recv(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 374 | } |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 375 | if (event_type & SUB_RETRY_SEND) { |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 376 | sw = param; |
Olivier Houchard | 35d1168 | 2019-05-14 18:02:47 +0200 | [diff] [blame] | 377 | BUG_ON(conn->send_wait != NULL || (sw->events & SUB_RETRY_SEND)); |
| 378 | sw->events |= SUB_RETRY_SEND; |
| 379 | conn->send_wait = sw; |
Willy Tarreau | 4f6516d | 2018-12-19 13:59:17 +0100 | [diff] [blame] | 380 | event_type &= ~SUB_RETRY_SEND; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 381 | __conn_xprt_want_send(conn); |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 382 | } |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 383 | if (event_type != 0) |
| 384 | return (-1); |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 385 | conn_update_xprt_polling(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 386 | return 0; |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 387 | } |
| 388 | |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 389 | /* Drains possibly pending incoming data on the file descriptor attached to the |
| 390 | * connection and update the connection's flags accordingly. This is used to |
| 391 | * know whether we need to disable lingering on close. Returns non-zero if it |
| 392 | * is safe to close without disabling lingering, otherwise zero. The SOCK_RD_SH |
| 393 | * flag may also be updated if the incoming shutdown was reported by the drain() |
| 394 | * function. |
| 395 | */ |
| 396 | int conn_sock_drain(struct connection *conn) |
| 397 | { |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 398 | int turns = 2; |
| 399 | int len; |
| 400 | |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 401 | if (!conn_ctrl_ready(conn)) |
| 402 | return 1; |
| 403 | |
| 404 | if (conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH)) |
| 405 | return 1; |
| 406 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 407 | if (fdtab[conn->handle.fd].ev & (FD_POLL_ERR|FD_POLL_HUP)) |
| 408 | goto shut; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 409 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 410 | if (!fd_recv_ready(conn->handle.fd)) |
| 411 | return 0; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 412 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 413 | if (conn->ctrl->drain) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 414 | if (conn->ctrl->drain(conn->handle.fd) <= 0) |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 415 | return 0; |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 416 | goto shut; |
| 417 | } |
| 418 | |
| 419 | /* no drain function defined, use the generic one */ |
| 420 | |
| 421 | while (turns) { |
| 422 | #ifdef MSG_TRUNC_CLEARS_INPUT |
| 423 | len = recv(conn->handle.fd, NULL, INT_MAX, MSG_DONTWAIT | MSG_NOSIGNAL | MSG_TRUNC); |
| 424 | if (len == -1 && errno == EFAULT) |
| 425 | #endif |
| 426 | len = recv(conn->handle.fd, trash.area, trash.size, |
| 427 | MSG_DONTWAIT | MSG_NOSIGNAL); |
| 428 | |
| 429 | if (len == 0) |
| 430 | goto shut; |
| 431 | |
| 432 | if (len < 0) { |
| 433 | if (errno == EAGAIN) { |
| 434 | /* connection not closed yet */ |
| 435 | fd_cant_recv(conn->handle.fd); |
| 436 | break; |
| 437 | } |
| 438 | if (errno == EINTR) /* oops, try again */ |
| 439 | continue; |
| 440 | /* other errors indicate a dead connection, fine. */ |
| 441 | goto shut; |
| 442 | } |
| 443 | /* OK we read some data, let's try again once */ |
| 444 | turns--; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 445 | } |
| 446 | |
Willy Tarreau | e215bba | 2018-08-24 14:31:53 +0200 | [diff] [blame] | 447 | /* some data are still present, give up */ |
| 448 | return 0; |
| 449 | |
| 450 | shut: |
| 451 | /* we're certain the connection was shut down */ |
| 452 | fdtab[conn->handle.fd].linger_risk = 0; |
Willy Tarreau | d85c485 | 2015-03-13 00:40:28 +0100 | [diff] [blame] | 453 | conn->flags |= CO_FL_SOCK_RD_SH; |
| 454 | return 1; |
| 455 | } |
| 456 | |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 457 | /* |
| 458 | * Get data length from tlv |
| 459 | */ |
| 460 | static int get_tlv_length(const struct tlv *src) |
| 461 | { |
| 462 | return (src->length_hi << 8) | src->length_lo; |
| 463 | } |
| 464 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 465 | /* This handshake handler waits a PROXY protocol header at the beginning of the |
| 466 | * raw data stream. The header looks like this : |
| 467 | * |
| 468 | * "PROXY" <SP> PROTO <SP> SRC3 <SP> DST3 <SP> SRC4 <SP> <DST4> "\r\n" |
| 469 | * |
| 470 | * There must be exactly one space between each field. Fields are : |
| 471 | * - PROTO : layer 4 protocol, which must be "TCP4" or "TCP6". |
| 472 | * - SRC3 : layer 3 (eg: IP) source address in standard text form |
| 473 | * - DST3 : layer 3 (eg: IP) destination address in standard text form |
| 474 | * - SRC4 : layer 4 (eg: TCP port) source address in standard text form |
| 475 | * - DST4 : layer 4 (eg: TCP port) destination address in standard text form |
| 476 | * |
| 477 | * This line MUST be at the beginning of the buffer and MUST NOT wrap. |
| 478 | * |
| 479 | * The header line is small and in all cases smaller than the smallest normal |
| 480 | * TCP MSS. So it MUST always be delivered as one segment, which ensures we |
| 481 | * can safely use MSG_PEEK and avoid buffering. |
| 482 | * |
| 483 | * Once the data is fetched, the values are set in the connection's address |
| 484 | * fields, and data are removed from the socket's buffer. The function returns |
| 485 | * zero if it needs to wait for more data or if it fails, or 1 if it completed |
| 486 | * and removed itself. |
| 487 | */ |
| 488 | int conn_recv_proxy(struct connection *conn, int flag) |
| 489 | { |
| 490 | char *line, *end; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 491 | struct proxy_hdr_v2 *hdr_v2; |
| 492 | const char v2sig[] = PP2_SIGNATURE; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 493 | int tlv_length = 0; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 494 | int tlv_offset = 0; |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 495 | int ret; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 496 | |
| 497 | /* we might have been called just after an asynchronous shutr */ |
| 498 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 499 | goto fail; |
| 500 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 501 | if (!conn_ctrl_ready(conn)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 502 | goto fail; |
| 503 | |
Willy Tarreau | ca79f59 | 2019-07-17 19:04:47 +0200 | [diff] [blame] | 504 | if (!sockaddr_alloc(&conn->src) || !sockaddr_alloc(&conn->dst)) |
| 505 | goto fail; |
| 506 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 507 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 508 | goto not_ready; |
Willy Tarreau | fd803bb | 2014-01-20 15:13:07 +0100 | [diff] [blame] | 509 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 510 | do { |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 511 | ret = recv(conn->handle.fd, trash.area, trash.size, MSG_PEEK); |
| 512 | if (ret < 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 513 | if (errno == EINTR) |
| 514 | continue; |
| 515 | if (errno == EAGAIN) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 516 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 517 | goto not_ready; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 518 | } |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 519 | goto recv_abort; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 520 | } |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 521 | trash.data = ret; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 522 | } while (0); |
| 523 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 524 | if (!trash.data) { |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 525 | /* client shutdown */ |
| 526 | conn->err_code = CO_ER_PRX_EMPTY; |
| 527 | goto fail; |
| 528 | } |
| 529 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 530 | if (trash.data < 6) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 531 | goto missing; |
| 532 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 533 | line = trash.area; |
| 534 | end = trash.area + trash.data; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 535 | |
| 536 | /* Decode a possible proxy request, fail early if it does not match */ |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 537 | if (strncmp(line, "PROXY ", 6) != 0) |
| 538 | goto not_v1; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 539 | |
| 540 | line += 6; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 541 | if (trash.data < 9) /* shortest possible line */ |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 542 | goto missing; |
| 543 | |
David CARLIER | 42ff05e | 2016-03-24 09:22:36 +0000 | [diff] [blame] | 544 | if (memcmp(line, "TCP4 ", 5) == 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 545 | u32 src3, dst3, sport, dport; |
| 546 | |
| 547 | line += 5; |
| 548 | |
| 549 | src3 = inetaddr_host_lim_ret(line, end, &line); |
| 550 | if (line == end) |
| 551 | goto missing; |
| 552 | if (*line++ != ' ') |
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 | |
| 555 | dst3 = inetaddr_host_lim_ret(line, end, &line); |
| 556 | if (line == end) |
| 557 | goto missing; |
| 558 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 559 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 560 | |
| 561 | sport = read_uint((const char **)&line, end); |
| 562 | if (line == end) |
| 563 | goto missing; |
| 564 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 565 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 566 | |
| 567 | dport = read_uint((const char **)&line, end); |
| 568 | if (line > end - 2) |
| 569 | goto missing; |
| 570 | if (*line++ != '\r') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 571 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 572 | if (*line++ != '\n') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 573 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 574 | |
| 575 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 576 | ((struct sockaddr_in *)conn->src)->sin_family = AF_INET; |
| 577 | ((struct sockaddr_in *)conn->src)->sin_addr.s_addr = htonl(src3); |
| 578 | ((struct sockaddr_in *)conn->src)->sin_port = htons(sport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 579 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 580 | ((struct sockaddr_in *)conn->dst)->sin_family = AF_INET; |
| 581 | ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr = htonl(dst3); |
| 582 | ((struct sockaddr_in *)conn->dst)->sin_port = htons(dport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 583 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 584 | } |
David CARLIER | 42ff05e | 2016-03-24 09:22:36 +0000 | [diff] [blame] | 585 | else if (memcmp(line, "TCP6 ", 5) == 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 586 | u32 sport, dport; |
| 587 | char *src_s; |
| 588 | char *dst_s, *sport_s, *dport_s; |
| 589 | struct in6_addr src3, dst3; |
| 590 | |
| 591 | line += 5; |
| 592 | |
| 593 | src_s = line; |
| 594 | dst_s = sport_s = dport_s = NULL; |
| 595 | while (1) { |
| 596 | if (line > end - 2) { |
| 597 | goto missing; |
| 598 | } |
| 599 | else if (*line == '\r') { |
| 600 | *line = 0; |
| 601 | line++; |
| 602 | if (*line++ != '\n') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 603 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 604 | break; |
| 605 | } |
| 606 | |
| 607 | if (*line == ' ') { |
| 608 | *line = 0; |
| 609 | if (!dst_s) |
| 610 | dst_s = line + 1; |
| 611 | else if (!sport_s) |
| 612 | sport_s = line + 1; |
| 613 | else if (!dport_s) |
| 614 | dport_s = line + 1; |
| 615 | } |
| 616 | line++; |
| 617 | } |
| 618 | |
| 619 | if (!dst_s || !sport_s || !dport_s) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 620 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 621 | |
| 622 | sport = read_uint((const char **)&sport_s,dport_s - 1); |
| 623 | if (*sport_s != 0) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 624 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 625 | |
| 626 | dport = read_uint((const char **)&dport_s,line - 2); |
| 627 | if (*dport_s != 0) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 628 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 629 | |
| 630 | if (inet_pton(AF_INET6, src_s, (void *)&src3) != 1) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 631 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 632 | |
| 633 | if (inet_pton(AF_INET6, dst_s, (void *)&dst3) != 1) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 634 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 635 | |
| 636 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 637 | ((struct sockaddr_in6 *)conn->src)->sin6_family = AF_INET6; |
| 638 | memcpy(&((struct sockaddr_in6 *)conn->src)->sin6_addr, &src3, sizeof(struct in6_addr)); |
| 639 | ((struct sockaddr_in6 *)conn->src)->sin6_port = htons(sport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 640 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 641 | ((struct sockaddr_in6 *)conn->dst)->sin6_family = AF_INET6; |
| 642 | memcpy(&((struct sockaddr_in6 *)conn->dst)->sin6_addr, &dst3, sizeof(struct in6_addr)); |
| 643 | ((struct sockaddr_in6 *)conn->dst)->sin6_port = htons(dport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 644 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 645 | } |
Willy Tarreau | 4c20d29 | 2014-06-14 11:41:36 +0200 | [diff] [blame] | 646 | else if (memcmp(line, "UNKNOWN\r\n", 9) == 0) { |
| 647 | /* This can be a UNIX socket forwarded by an haproxy upstream */ |
| 648 | line += 9; |
| 649 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 650 | else { |
Willy Tarreau | 4c20d29 | 2014-06-14 11:41:36 +0200 | [diff] [blame] | 651 | /* The protocol does not match something known (TCP4/TCP6/UNKNOWN) */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 652 | conn->err_code = CO_ER_PRX_BAD_PROTO; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 653 | goto fail; |
| 654 | } |
| 655 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 656 | trash.data = line - trash.area; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 657 | goto eat_header; |
| 658 | |
| 659 | not_v1: |
| 660 | /* try PPv2 */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 661 | if (trash.data < PP2_HEADER_LEN) |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 662 | goto missing; |
| 663 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 664 | hdr_v2 = (struct proxy_hdr_v2 *) trash.area; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 665 | |
| 666 | if (memcmp(hdr_v2->sig, v2sig, PP2_SIGNATURE_LEN) != 0 || |
| 667 | (hdr_v2->ver_cmd & PP2_VERSION_MASK) != PP2_VERSION) { |
| 668 | conn->err_code = CO_ER_PRX_NOT_HDR; |
| 669 | goto fail; |
| 670 | } |
| 671 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 672 | if (trash.data < PP2_HEADER_LEN + ntohs(hdr_v2->len)) |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 673 | goto missing; |
| 674 | |
| 675 | switch (hdr_v2->ver_cmd & PP2_CMD_MASK) { |
| 676 | case 0x01: /* PROXY command */ |
| 677 | switch (hdr_v2->fam) { |
| 678 | case 0x11: /* TCPv4 */ |
KOVACS Krisztian | efd3aa9 | 2014-11-19 10:53:20 +0100 | [diff] [blame] | 679 | if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET) |
| 680 | goto bad_header; |
| 681 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 682 | ((struct sockaddr_in *)conn->src)->sin_family = AF_INET; |
| 683 | ((struct sockaddr_in *)conn->src)->sin_addr.s_addr = hdr_v2->addr.ip4.src_addr; |
| 684 | ((struct sockaddr_in *)conn->src)->sin_port = hdr_v2->addr.ip4.src_port; |
| 685 | ((struct sockaddr_in *)conn->dst)->sin_family = AF_INET; |
| 686 | ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr = hdr_v2->addr.ip4.dst_addr; |
| 687 | ((struct sockaddr_in *)conn->dst)->sin_port = hdr_v2->addr.ip4.dst_port; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 688 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 689 | tlv_offset = PP2_HEADER_LEN + PP2_ADDR_LEN_INET; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 690 | tlv_length = ntohs(hdr_v2->len) - PP2_ADDR_LEN_INET; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 691 | break; |
| 692 | case 0x21: /* TCPv6 */ |
KOVACS Krisztian | efd3aa9 | 2014-11-19 10:53:20 +0100 | [diff] [blame] | 693 | if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET6) |
| 694 | goto bad_header; |
| 695 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 696 | ((struct sockaddr_in6 *)conn->src)->sin6_family = AF_INET6; |
| 697 | memcpy(&((struct sockaddr_in6 *)conn->src)->sin6_addr, hdr_v2->addr.ip6.src_addr, 16); |
| 698 | ((struct sockaddr_in6 *)conn->src)->sin6_port = hdr_v2->addr.ip6.src_port; |
| 699 | ((struct sockaddr_in6 *)conn->dst)->sin6_family = AF_INET6; |
| 700 | memcpy(&((struct sockaddr_in6 *)conn->dst)->sin6_addr, hdr_v2->addr.ip6.dst_addr, 16); |
| 701 | ((struct sockaddr_in6 *)conn->dst)->sin6_port = hdr_v2->addr.ip6.dst_port; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 702 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 703 | tlv_offset = PP2_HEADER_LEN + PP2_ADDR_LEN_INET6; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 704 | tlv_length = ntohs(hdr_v2->len) - PP2_ADDR_LEN_INET6; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 705 | break; |
| 706 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 707 | |
| 708 | /* TLV parsing */ |
| 709 | if (tlv_length > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 710 | while (tlv_offset + TLV_HEADER_SIZE <= trash.data) { |
| 711 | const struct tlv *tlv_packet = (struct tlv *) &trash.area[tlv_offset]; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 712 | const int tlv_len = get_tlv_length(tlv_packet); |
| 713 | tlv_offset += tlv_len + TLV_HEADER_SIZE; |
| 714 | |
| 715 | switch (tlv_packet->type) { |
Emmanuel Hocdet | 115df3e | 2018-02-05 16:23:23 +0100 | [diff] [blame] | 716 | case PP2_TYPE_CRC32C: { |
| 717 | void *tlv_crc32c_p = (void *)tlv_packet->value; |
| 718 | uint32_t n_crc32c = ntohl(read_u32(tlv_crc32c_p)); |
| 719 | write_u32(tlv_crc32c_p, 0); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 720 | 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] | 721 | goto bad_header; |
| 722 | break; |
| 723 | } |
Willy Tarreau | e573323 | 2019-05-22 19:24:06 +0200 | [diff] [blame] | 724 | #ifdef USE_NS |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 725 | case PP2_TYPE_NETNS: { |
| 726 | const struct netns_entry *ns; |
| 727 | ns = netns_store_lookup((char*)tlv_packet->value, tlv_len); |
| 728 | if (ns) |
| 729 | conn->proxy_netns = ns; |
| 730 | break; |
| 731 | } |
| 732 | #endif |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 733 | case PP2_TYPE_AUTHORITY: { |
| 734 | if (tlv_len > PP2_AUTHORITY_MAX) |
| 735 | goto bad_header; |
| 736 | conn->proxy_authority = pool_alloc(pool_head_authority); |
| 737 | if (conn->proxy_authority == NULL) |
| 738 | goto fail; |
| 739 | memcpy(conn->proxy_authority, (const char *)tlv_packet->value, tlv_len); |
| 740 | conn->proxy_authority_len = tlv_len; |
| 741 | break; |
| 742 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 743 | default: |
| 744 | break; |
| 745 | } |
| 746 | } |
| 747 | } |
| 748 | |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 749 | /* unsupported protocol, keep local connection address */ |
| 750 | break; |
| 751 | case 0x00: /* LOCAL command */ |
| 752 | /* keep local connection address for LOCAL */ |
| 753 | break; |
| 754 | default: |
| 755 | goto bad_header; /* not a supported command */ |
| 756 | } |
| 757 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 758 | trash.data = PP2_HEADER_LEN + ntohs(hdr_v2->len); |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 759 | goto eat_header; |
| 760 | |
| 761 | eat_header: |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 762 | /* remove the PROXY line from the request. For this we re-read the |
| 763 | * exact line at once. If we don't get the exact same result, we |
| 764 | * fail. |
| 765 | */ |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 766 | do { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 767 | int len2 = recv(conn->handle.fd, trash.area, trash.data, 0); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 768 | if (len2 < 0 && errno == EINTR) |
| 769 | continue; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 770 | if (len2 != trash.data) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 771 | goto recv_abort; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 772 | } while (0); |
| 773 | |
| 774 | conn->flags &= ~flag; |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 775 | conn->flags |= CO_FL_RCVD_PROXY; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 776 | return 1; |
| 777 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 778 | not_ready: |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 779 | return 0; |
| 780 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 781 | missing: |
| 782 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 783 | * we have not read anything. Otherwise we need to fail because we won't |
| 784 | * be able to poll anymore. |
| 785 | */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 786 | conn->err_code = CO_ER_PRX_TRUNCATED; |
| 787 | goto fail; |
| 788 | |
| 789 | bad_header: |
| 790 | /* This is not a valid proxy protocol header */ |
| 791 | conn->err_code = CO_ER_PRX_BAD_HDR; |
| 792 | goto fail; |
| 793 | |
| 794 | recv_abort: |
| 795 | conn->err_code = CO_ER_PRX_ABORT; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 796 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 797 | goto fail; |
| 798 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 799 | fail: |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 800 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 801 | return 0; |
| 802 | } |
| 803 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 804 | /* This handshake handler waits a NetScaler Client IP insertion header |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 805 | * at the beginning of the raw data stream. The header format is |
| 806 | * described in doc/netscaler-client-ip-insertion-protocol.txt |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 807 | * |
| 808 | * This line MUST be at the beginning of the buffer and MUST NOT be |
| 809 | * fragmented. |
| 810 | * |
| 811 | * The header line is small and in all cases smaller than the smallest normal |
| 812 | * TCP MSS. So it MUST always be delivered as one segment, which ensures we |
| 813 | * can safely use MSG_PEEK and avoid buffering. |
| 814 | * |
| 815 | * Once the data is fetched, the values are set in the connection's address |
| 816 | * fields, and data are removed from the socket's buffer. The function returns |
| 817 | * zero if it needs to wait for more data or if it fails, or 1 if it completed |
| 818 | * and removed itself. |
| 819 | */ |
| 820 | int conn_recv_netscaler_cip(struct connection *conn, int flag) |
| 821 | { |
| 822 | char *line; |
Bertrand Jacquin | 7d668f9 | 2017-12-13 01:23:39 +0000 | [diff] [blame] | 823 | uint32_t hdr_len; |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 824 | uint8_t ip_ver; |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 825 | int ret; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 826 | |
| 827 | /* we might have been called just after an asynchronous shutr */ |
| 828 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 829 | goto fail; |
| 830 | |
| 831 | if (!conn_ctrl_ready(conn)) |
| 832 | goto fail; |
| 833 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 834 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 835 | goto not_ready; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 836 | |
| 837 | do { |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 838 | ret = recv(conn->handle.fd, trash.area, trash.size, MSG_PEEK); |
| 839 | if (ret < 0) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 840 | if (errno == EINTR) |
| 841 | continue; |
| 842 | if (errno == EAGAIN) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 843 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 844 | goto not_ready; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 845 | } |
| 846 | goto recv_abort; |
| 847 | } |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 848 | trash.data = ret; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 849 | } while (0); |
| 850 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 851 | if (!trash.data) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 852 | /* client shutdown */ |
| 853 | conn->err_code = CO_ER_CIP_EMPTY; |
| 854 | goto fail; |
| 855 | } |
| 856 | |
| 857 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 858 | * CIP magic, header length or |
| 859 | * CIP magic, CIP length, CIP type, header length */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 860 | if (trash.data < 12) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 861 | goto missing; |
| 862 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 863 | line = trash.area; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 864 | |
| 865 | /* Decode a possible NetScaler Client IP request, fail early if |
| 866 | * it does not match */ |
Willy Tarreau | 55e0da6 | 2018-09-20 11:26:52 +0200 | [diff] [blame] | 867 | 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] | 868 | goto bad_magic; |
| 869 | |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 870 | /* Legacy CIP protocol */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 871 | if ((trash.area[8] & 0xD0) == 0x40) { |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 872 | hdr_len = ntohl(*(uint32_t *)(line+4)); |
| 873 | line += 8; |
| 874 | } |
| 875 | /* Standard CIP protocol */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 876 | else if (trash.area[8] == 0x00) { |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 877 | hdr_len = ntohs(*(uint32_t *)(line+10)); |
| 878 | line += 12; |
| 879 | } |
| 880 | /* Unknown CIP protocol */ |
| 881 | else { |
| 882 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 883 | goto fail; |
| 884 | } |
| 885 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 886 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 887 | * a minimal IP header */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 888 | if (trash.data < 20) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 889 | goto missing; |
| 890 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 891 | /* Get IP version from the first four bits */ |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 892 | ip_ver = (*line & 0xf0) >> 4; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 893 | |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 894 | if (ip_ver == 4) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 895 | struct ip *hdr_ip4; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 896 | struct my_tcphdr *hdr_tcp; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 897 | |
| 898 | hdr_ip4 = (struct ip *)line; |
| 899 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 900 | if (trash.data < 40 || trash.data < hdr_len) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 901 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 67de5a2 | 2017-12-13 01:15:05 +0000 | [diff] [blame] | 902 | * IPv4 header, TCP header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 903 | goto missing; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 904 | } |
| 905 | else if (hdr_ip4->ip_p != IPPROTO_TCP) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 906 | /* The protocol does not include a TCP header */ |
| 907 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 908 | goto fail; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 909 | } |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 910 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 911 | hdr_tcp = (struct my_tcphdr *)(line + (hdr_ip4->ip_hl * 4)); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 912 | |
| 913 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 914 | ((struct sockaddr_in *)conn->src)->sin_family = AF_INET; |
| 915 | ((struct sockaddr_in *)conn->src)->sin_addr.s_addr = hdr_ip4->ip_src.s_addr; |
| 916 | ((struct sockaddr_in *)conn->src)->sin_port = hdr_tcp->source; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 917 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 918 | ((struct sockaddr_in *)conn->dst)->sin_family = AF_INET; |
| 919 | ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr = hdr_ip4->ip_dst.s_addr; |
| 920 | ((struct sockaddr_in *)conn->dst)->sin_port = hdr_tcp->dest; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 921 | |
| 922 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 923 | } |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 924 | else if (ip_ver == 6) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 925 | struct ip6_hdr *hdr_ip6; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 926 | struct my_tcphdr *hdr_tcp; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 927 | |
| 928 | hdr_ip6 = (struct ip6_hdr *)line; |
| 929 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 930 | if (trash.data < 60 || trash.data < hdr_len) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 931 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 67de5a2 | 2017-12-13 01:15:05 +0000 | [diff] [blame] | 932 | * IPv6 header, TCP header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 933 | goto missing; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 934 | } |
| 935 | else if (hdr_ip6->ip6_nxt != IPPROTO_TCP) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 936 | /* The protocol does not include a TCP header */ |
| 937 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 938 | goto fail; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 939 | } |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 940 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 941 | hdr_tcp = (struct my_tcphdr *)(line + sizeof(struct ip6_hdr)); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 942 | |
| 943 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 944 | ((struct sockaddr_in6 *)conn->src)->sin6_family = AF_INET6; |
| 945 | ((struct sockaddr_in6 *)conn->src)->sin6_addr = hdr_ip6->ip6_src; |
| 946 | ((struct sockaddr_in6 *)conn->src)->sin6_port = hdr_tcp->source; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 947 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 948 | ((struct sockaddr_in6 *)conn->dst)->sin6_family = AF_INET6; |
| 949 | ((struct sockaddr_in6 *)conn->dst)->sin6_addr = hdr_ip6->ip6_dst; |
| 950 | ((struct sockaddr_in6 *)conn->dst)->sin6_port = hdr_tcp->dest; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 951 | |
| 952 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 953 | } |
| 954 | else { |
| 955 | /* The protocol does not match something known (IPv4/IPv6) */ |
| 956 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 957 | goto fail; |
| 958 | } |
| 959 | |
Bertrand Jacquin | 7d668f9 | 2017-12-13 01:23:39 +0000 | [diff] [blame] | 960 | line += hdr_len; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 961 | trash.data = line - trash.area; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 962 | |
| 963 | /* remove the NetScaler Client IP header from the request. For this |
| 964 | * we re-read the exact line at once. If we don't get the exact same |
| 965 | * result, we fail. |
| 966 | */ |
| 967 | do { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 968 | int len2 = recv(conn->handle.fd, trash.area, trash.data, 0); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 969 | if (len2 < 0 && errno == EINTR) |
| 970 | continue; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 971 | if (len2 != trash.data) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 972 | goto recv_abort; |
| 973 | } while (0); |
| 974 | |
| 975 | conn->flags &= ~flag; |
| 976 | return 1; |
| 977 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 978 | not_ready: |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 979 | return 0; |
| 980 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 981 | missing: |
| 982 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 983 | * we have not read anything. Otherwise we need to fail because we won't |
| 984 | * be able to poll anymore. |
| 985 | */ |
| 986 | conn->err_code = CO_ER_CIP_TRUNCATED; |
| 987 | goto fail; |
| 988 | |
| 989 | bad_magic: |
| 990 | conn->err_code = CO_ER_CIP_BAD_MAGIC; |
| 991 | goto fail; |
| 992 | |
| 993 | recv_abort: |
| 994 | conn->err_code = CO_ER_CIP_ABORT; |
| 995 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
| 996 | goto fail; |
| 997 | |
| 998 | fail: |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 999 | conn->flags |= CO_FL_ERROR; |
| 1000 | return 0; |
| 1001 | } |
| 1002 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1003 | |
| 1004 | int conn_send_socks4_proxy_request(struct connection *conn) |
| 1005 | { |
| 1006 | struct socks4_request req_line; |
| 1007 | |
| 1008 | /* we might have been called just after an asynchronous shutw */ |
| 1009 | if (conn->flags & CO_FL_SOCK_WR_SH) |
| 1010 | goto out_error; |
| 1011 | |
| 1012 | if (!conn_ctrl_ready(conn)) |
| 1013 | goto out_error; |
| 1014 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1015 | if (!conn_get_dst(conn)) |
| 1016 | goto out_error; |
| 1017 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1018 | req_line.version = 0x04; |
| 1019 | req_line.command = 0x01; |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1020 | req_line.port = get_net_port(conn->dst); |
| 1021 | req_line.ip = is_inet_addr(conn->dst); |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1022 | memcpy(req_line.user_id, "HAProxy\0", 8); |
| 1023 | |
| 1024 | if (conn->send_proxy_ofs > 0) { |
| 1025 | /* |
| 1026 | * This is the first call to send the request |
| 1027 | */ |
| 1028 | conn->send_proxy_ofs = -(int)sizeof(req_line); |
| 1029 | } |
| 1030 | |
| 1031 | if (conn->send_proxy_ofs < 0) { |
| 1032 | int ret = 0; |
| 1033 | |
| 1034 | /* we are sending the socks4_req_line here. If the data layer |
| 1035 | * has a pending write, we'll also set MSG_MORE. |
| 1036 | */ |
| 1037 | ret = conn_sock_send( |
| 1038 | conn, |
| 1039 | ((char *)(&req_line)) + (sizeof(req_line)+conn->send_proxy_ofs), |
| 1040 | -conn->send_proxy_ofs, |
| 1041 | (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0); |
| 1042 | |
| 1043 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Before send remain is [%d], sent [%d]\n", |
| 1044 | conn->handle.fd, -conn->send_proxy_ofs, ret); |
| 1045 | |
| 1046 | if (ret < 0) { |
| 1047 | goto out_error; |
| 1048 | } |
| 1049 | |
| 1050 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 1051 | if (conn->send_proxy_ofs != 0) { |
| 1052 | goto out_wait; |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | /* OK we've the whole request sent */ |
| 1057 | conn->flags &= ~CO_FL_SOCKS4_SEND; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1058 | |
| 1059 | /* The connection is ready now, simply return and let the connection |
| 1060 | * handler notify upper layers if needed. |
| 1061 | */ |
| 1062 | if (conn->flags & CO_FL_WAIT_L4_CONN) |
| 1063 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 1064 | |
| 1065 | if (conn->flags & CO_FL_SEND_PROXY) { |
| 1066 | /* |
| 1067 | * Get the send_proxy_ofs ready for the send_proxy due to we are |
| 1068 | * reusing the "send_proxy_ofs", and SOCKS4 handshake should be done |
| 1069 | * before sending PROXY Protocol. |
| 1070 | */ |
| 1071 | conn->send_proxy_ofs = 1; |
| 1072 | } |
| 1073 | return 1; |
| 1074 | |
| 1075 | out_error: |
| 1076 | /* Write error on the file descriptor */ |
| 1077 | conn->flags |= CO_FL_ERROR; |
| 1078 | if (conn->err_code == CO_ER_NONE) { |
| 1079 | conn->err_code = CO_ER_SOCKS4_SEND; |
| 1080 | } |
| 1081 | return 0; |
| 1082 | |
| 1083 | out_wait: |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1084 | return 0; |
| 1085 | } |
| 1086 | |
| 1087 | int conn_recv_socks4_proxy_response(struct connection *conn) |
| 1088 | { |
| 1089 | char line[SOCKS4_HS_RSP_LEN]; |
| 1090 | int ret; |
| 1091 | |
| 1092 | /* we might have been called just after an asynchronous shutr */ |
| 1093 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 1094 | goto fail; |
| 1095 | |
| 1096 | if (!conn_ctrl_ready(conn)) |
| 1097 | goto fail; |
| 1098 | |
| 1099 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1100 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1101 | |
| 1102 | do { |
| 1103 | /* SOCKS4 Proxy will response with 8 bytes, 0x00 | 0x5A | 0x00 0x00 | 0x00 0x00 0x00 0x00 |
| 1104 | * Try to peek into it, before all 8 bytes ready. |
| 1105 | */ |
| 1106 | ret = recv(conn->handle.fd, line, SOCKS4_HS_RSP_LEN, MSG_PEEK); |
| 1107 | |
| 1108 | if (ret == 0) { |
| 1109 | /* the socket has been closed or shutdown for send */ |
| 1110 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], errno[%d], looks like the socket has been closed or shutdown for send\n", |
| 1111 | conn->handle.fd, ret, errno); |
| 1112 | if (conn->err_code == CO_ER_NONE) { |
| 1113 | conn->err_code = CO_ER_SOCKS4_RECV; |
| 1114 | } |
| 1115 | goto fail; |
| 1116 | } |
| 1117 | |
| 1118 | if (ret > 0) { |
| 1119 | if (ret == SOCKS4_HS_RSP_LEN) { |
| 1120 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received 8 bytes, the response is [%02X|%02X|%02X %02X|%02X %02X %02X %02X]\n", |
| 1121 | conn->handle.fd, line[0], line[1], line[2], line[3], line[4], line[5], line[6], line[7]); |
| 1122 | }else{ |
| 1123 | 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]); |
| 1124 | } |
| 1125 | } else { |
| 1126 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], errno[%d]\n", conn->handle.fd, ret, errno); |
| 1127 | } |
| 1128 | |
| 1129 | if (ret < 0) { |
| 1130 | if (errno == EINTR) { |
| 1131 | continue; |
| 1132 | } |
| 1133 | if (errno == EAGAIN) { |
| 1134 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1135 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1136 | } |
| 1137 | goto recv_abort; |
| 1138 | } |
| 1139 | } while (0); |
| 1140 | |
| 1141 | if (ret < SOCKS4_HS_RSP_LEN) { |
| 1142 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 1143 | * we are not able to read enough data. |
| 1144 | */ |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1145 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1146 | } |
| 1147 | |
| 1148 | /* |
| 1149 | * Base on the SOCSK4 protocol: |
| 1150 | * |
| 1151 | * +----+----+----+----+----+----+----+----+ |
| 1152 | * | VN | CD | DSTPORT | DSTIP | |
| 1153 | * +----+----+----+----+----+----+----+----+ |
| 1154 | * # of bytes: 1 1 2 4 |
| 1155 | * VN is the version of the reply code and should be 0. CD is the result |
| 1156 | * code with one of the following values: |
| 1157 | * 90: request granted |
| 1158 | * 91: request rejected or failed |
| 1159 | * 92: request rejected becasue SOCKS server cannot connect to identd on the client |
| 1160 | * 93: request rejected because the client program and identd report different user-ids |
| 1161 | * The remaining fields are ignored. |
| 1162 | */ |
| 1163 | if (line[1] != 90) { |
| 1164 | conn->flags &= ~CO_FL_SOCKS4_RECV; |
| 1165 | |
| 1166 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: FAIL, the response is [%02X|%02X|%02X %02X|%02X %02X %02X %02X]\n", |
| 1167 | conn->handle.fd, line[0], line[1], line[2], line[3], line[4], line[5], line[6], line[7]); |
| 1168 | if (conn->err_code == CO_ER_NONE) { |
| 1169 | conn->err_code = CO_ER_SOCKS4_DENY; |
| 1170 | } |
| 1171 | goto fail; |
| 1172 | } |
| 1173 | |
| 1174 | /* remove the 8 bytes response from the stream */ |
| 1175 | do { |
| 1176 | ret = recv(conn->handle.fd, line, SOCKS4_HS_RSP_LEN, 0); |
| 1177 | if (ret < 0 && errno == EINTR) { |
| 1178 | continue; |
| 1179 | } |
| 1180 | if (ret != SOCKS4_HS_RSP_LEN) { |
| 1181 | if (conn->err_code == CO_ER_NONE) { |
| 1182 | conn->err_code = CO_ER_SOCKS4_RECV; |
| 1183 | } |
| 1184 | goto fail; |
| 1185 | } |
| 1186 | } while (0); |
| 1187 | |
| 1188 | conn->flags &= ~CO_FL_SOCKS4_RECV; |
| 1189 | return 1; |
| 1190 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1191 | not_ready: |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1192 | return 0; |
| 1193 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1194 | recv_abort: |
| 1195 | if (conn->err_code == CO_ER_NONE) { |
| 1196 | conn->err_code = CO_ER_SOCKS4_ABORT; |
| 1197 | } |
| 1198 | conn->flags |= (CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH); |
| 1199 | goto fail; |
| 1200 | |
| 1201 | fail: |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1202 | conn->flags |= CO_FL_ERROR; |
| 1203 | return 0; |
| 1204 | } |
| 1205 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1206 | /* Note: <remote> is explicitly allowed to be NULL */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1207 | int make_proxy_line(char *buf, int buf_len, struct server *srv, struct connection *remote) |
| 1208 | { |
| 1209 | int ret = 0; |
| 1210 | |
| 1211 | if (srv && (srv->pp_opts & SRV_PP_V2)) { |
| 1212 | ret = make_proxy_line_v2(buf, buf_len, srv, remote); |
| 1213 | } |
| 1214 | else { |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1215 | if (remote && conn_get_src(remote) && conn_get_dst(remote)) |
| 1216 | ret = make_proxy_line_v1(buf, buf_len, remote->src, remote->dst); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1217 | else |
| 1218 | ret = make_proxy_line_v1(buf, buf_len, NULL, NULL); |
| 1219 | } |
| 1220 | |
| 1221 | return ret; |
| 1222 | } |
| 1223 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1224 | /* Makes a PROXY protocol line from the two addresses. The output is sent to |
| 1225 | * buffer <buf> for a maximum size of <buf_len> (including the trailing zero). |
| 1226 | * It returns the number of bytes composing this line (including the trailing |
| 1227 | * 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] | 1228 | * TCP6 and "UNKNOWN" formats. If any of <src> or <dst> is null, UNKNOWN is |
| 1229 | * emitted as well. |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1230 | */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1231 | 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] | 1232 | { |
| 1233 | int ret = 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1234 | char * protocol; |
| 1235 | char src_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)]; |
| 1236 | char dst_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)]; |
| 1237 | in_port_t src_port; |
| 1238 | in_port_t dst_port; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1239 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1240 | if ( !src |
| 1241 | || !dst |
| 1242 | || (src->ss_family != AF_INET && src->ss_family != AF_INET6) |
| 1243 | || (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) { |
| 1244 | /* unknown family combination */ |
| 1245 | ret = snprintf(buf, buf_len, "PROXY UNKNOWN\r\n"); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1246 | if (ret >= buf_len) |
| 1247 | return 0; |
| 1248 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1249 | return ret; |
| 1250 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1251 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1252 | /* IPv4 for both src and dst */ |
| 1253 | if (src->ss_family == AF_INET && dst->ss_family == AF_INET) { |
| 1254 | protocol = "TCP4"; |
| 1255 | 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] | 1256 | return 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1257 | src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1258 | 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] | 1259 | return 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1260 | dst_port = ((struct sockaddr_in *)dst)->sin_port; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1261 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1262 | /* IPv6 for at least one of src and dst */ |
| 1263 | else { |
| 1264 | struct in6_addr tmp; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1265 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1266 | protocol = "TCP6"; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1267 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1268 | if (src->ss_family == AF_INET) { |
| 1269 | /* Convert src to IPv6 */ |
| 1270 | v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr); |
| 1271 | src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1272 | } |
| 1273 | else { |
| 1274 | tmp = ((struct sockaddr_in6 *)src)->sin6_addr; |
| 1275 | src_port = ((struct sockaddr_in6 *)src)->sin6_port; |
| 1276 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1277 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1278 | if (!inet_ntop(AF_INET6, &tmp, src_str, sizeof(src_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1279 | return 0; |
| 1280 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1281 | if (dst->ss_family == AF_INET) { |
| 1282 | /* Convert dst to IPv6 */ |
| 1283 | v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr); |
| 1284 | dst_port = ((struct sockaddr_in *)dst)->sin_port; |
| 1285 | } |
| 1286 | else { |
| 1287 | tmp = ((struct sockaddr_in6 *)dst)->sin6_addr; |
| 1288 | dst_port = ((struct sockaddr_in6 *)dst)->sin6_port; |
| 1289 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1290 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1291 | if (!inet_ntop(AF_INET6, &tmp, dst_str, sizeof(dst_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1292 | return 0; |
| 1293 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1294 | |
| 1295 | ret = snprintf(buf, buf_len, "PROXY %s %s %s %u %u\r\n", protocol, src_str, dst_str, ntohs(src_port), ntohs(dst_port)); |
| 1296 | if (ret >= buf_len) |
| 1297 | return 0; |
| 1298 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1299 | return ret; |
| 1300 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1301 | |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1302 | 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] | 1303 | { |
| 1304 | struct tlv *tlv; |
| 1305 | |
| 1306 | if (!dest || (length + sizeof(*tlv) > dest_len)) |
| 1307 | return 0; |
| 1308 | |
| 1309 | tlv = (struct tlv *)dest; |
| 1310 | |
| 1311 | tlv->type = type; |
| 1312 | tlv->length_hi = length >> 8; |
| 1313 | tlv->length_lo = length & 0x00ff; |
| 1314 | memcpy(tlv->value, value, length); |
| 1315 | return length + sizeof(*tlv); |
| 1316 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1317 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1318 | /* Note: <remote> is explicitly allowed to be NULL */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1319 | int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connection *remote) |
| 1320 | { |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1321 | const char pp2_signature[] = PP2_SIGNATURE; |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1322 | void *tlv_crc32c_p = NULL; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1323 | int ret = 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1324 | struct proxy_hdr_v2 *hdr = (struct proxy_hdr_v2 *)buf; |
Vincent Bernat | 6e61589 | 2016-05-18 16:17:44 +0200 | [diff] [blame] | 1325 | struct sockaddr_storage null_addr = { .ss_family = 0 }; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1326 | struct sockaddr_storage *src = &null_addr; |
| 1327 | struct sockaddr_storage *dst = &null_addr; |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1328 | const char *value; |
| 1329 | int value_len; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1330 | |
| 1331 | if (buf_len < PP2_HEADER_LEN) |
| 1332 | return 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1333 | memcpy(hdr->sig, pp2_signature, PP2_SIGNATURE_LEN); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1334 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1335 | if (remote && conn_get_src(remote) && conn_get_dst(remote)) { |
| 1336 | src = remote->src; |
| 1337 | dst = remote->dst; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1338 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1339 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1340 | /* At least one of src or dst is not of AF_INET or AF_INET6 */ |
| 1341 | if ( !src |
| 1342 | || !dst |
| 1343 | || (src->ss_family != AF_INET && src->ss_family != AF_INET6) |
| 1344 | || (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) { |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1345 | if (buf_len < PP2_HDR_LEN_UNSPEC) |
| 1346 | return 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1347 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_LOCAL; |
| 1348 | hdr->fam = PP2_FAM_UNSPEC | PP2_TRANS_UNSPEC; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1349 | ret = PP2_HDR_LEN_UNSPEC; |
| 1350 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1351 | else { |
| 1352 | /* IPv4 for both src and dst */ |
| 1353 | if (src->ss_family == AF_INET && dst->ss_family == AF_INET) { |
| 1354 | if (buf_len < PP2_HDR_LEN_INET) |
| 1355 | return 0; |
| 1356 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY; |
| 1357 | hdr->fam = PP2_FAM_INET | PP2_TRANS_STREAM; |
| 1358 | hdr->addr.ip4.src_addr = ((struct sockaddr_in *)src)->sin_addr.s_addr; |
| 1359 | hdr->addr.ip4.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1360 | hdr->addr.ip4.dst_addr = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
| 1361 | hdr->addr.ip4.dst_port = ((struct sockaddr_in *)dst)->sin_port; |
| 1362 | ret = PP2_HDR_LEN_INET; |
| 1363 | } |
| 1364 | /* IPv6 for at least one of src and dst */ |
| 1365 | else { |
| 1366 | struct in6_addr tmp; |
| 1367 | |
| 1368 | if (buf_len < PP2_HDR_LEN_INET6) |
| 1369 | return 0; |
| 1370 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY; |
| 1371 | hdr->fam = PP2_FAM_INET6 | PP2_TRANS_STREAM; |
| 1372 | if (src->ss_family == AF_INET) { |
| 1373 | v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr); |
| 1374 | memcpy(hdr->addr.ip6.src_addr, &tmp, 16); |
| 1375 | hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1376 | } |
| 1377 | else { |
| 1378 | memcpy(hdr->addr.ip6.src_addr, &((struct sockaddr_in6 *)src)->sin6_addr, 16); |
| 1379 | hdr->addr.ip6.src_port = ((struct sockaddr_in6 *)src)->sin6_port; |
| 1380 | } |
| 1381 | if (dst->ss_family == AF_INET) { |
| 1382 | v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr); |
| 1383 | memcpy(hdr->addr.ip6.dst_addr, &tmp, 16); |
| 1384 | hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1385 | } |
| 1386 | else { |
| 1387 | memcpy(hdr->addr.ip6.dst_addr, &((struct sockaddr_in6 *)dst)->sin6_addr, 16); |
| 1388 | hdr->addr.ip6.dst_port = ((struct sockaddr_in6 *)dst)->sin6_port; |
| 1389 | } |
| 1390 | |
| 1391 | ret = PP2_HDR_LEN_INET6; |
| 1392 | } |
| 1393 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1394 | |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1395 | if (srv->pp_opts & SRV_PP_V2_CRC32C) { |
| 1396 | uint32_t zero_crc32c = 0; |
| 1397 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1398 | return 0; |
| 1399 | tlv_crc32c_p = (void *)((struct tlv *)&buf[ret])->value; |
| 1400 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_CRC32C, sizeof(zero_crc32c), (const char *)&zero_crc32c); |
| 1401 | } |
| 1402 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1403 | if (remote && conn_get_alpn(remote, &value, &value_len)) { |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1404 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1405 | return 0; |
Emmanuel Hocdet | 571c7ac | 2017-10-31 18:24:05 +0100 | [diff] [blame] | 1406 | 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] | 1407 | } |
| 1408 | |
Emmanuel Hocdet | 253c3b7 | 2018-02-01 18:29:59 +0100 | [diff] [blame] | 1409 | if (srv->pp_opts & SRV_PP_V2_AUTHORITY) { |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1410 | value = NULL; |
| 1411 | if (remote && remote->proxy_authority) { |
| 1412 | value = remote->proxy_authority; |
| 1413 | value_len = remote->proxy_authority_len; |
| 1414 | } |
| 1415 | #ifdef USE_OPENSSL |
| 1416 | else { |
Jerome Magnin | 78891c7 | 2019-09-02 09:53:41 +0200 | [diff] [blame] | 1417 | if ((value = ssl_sock_get_sni(remote))) |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1418 | value_len = strlen(value); |
| 1419 | } |
| 1420 | #endif |
Emmanuel Hocdet | 253c3b7 | 2018-02-01 18:29:59 +0100 | [diff] [blame] | 1421 | if (value) { |
| 1422 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1423 | return 0; |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1424 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_AUTHORITY, value_len, value); |
Emmanuel Hocdet | 253c3b7 | 2018-02-01 18:29:59 +0100 | [diff] [blame] | 1425 | } |
| 1426 | } |
| 1427 | |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1428 | #ifdef USE_OPENSSL |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1429 | if (srv->pp_opts & SRV_PP_V2_SSL) { |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1430 | struct tlv_ssl *tlv; |
| 1431 | int ssl_tlv_len = 0; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1432 | if ((buf_len - ret) < sizeof(struct tlv_ssl)) |
| 1433 | return 0; |
| 1434 | tlv = (struct tlv_ssl *)&buf[ret]; |
| 1435 | memset(tlv, 0, sizeof(struct tlv_ssl)); |
| 1436 | ssl_tlv_len += sizeof(struct tlv_ssl); |
| 1437 | tlv->tlv.type = PP2_TYPE_SSL; |
| 1438 | if (ssl_sock_is_ssl(remote)) { |
| 1439 | tlv->client |= PP2_CLIENT_SSL; |
Emmanuel Hocdet | 01da571 | 2017-10-13 16:59:49 +0200 | [diff] [blame] | 1440 | value = ssl_sock_get_proto_version(remote); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1441 | if (value) { |
Emmanuel Hocdet | 8c0c34b | 2018-02-28 12:02:14 +0100 | [diff] [blame] | 1442 | 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] | 1443 | } |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 1444 | if (ssl_sock_get_cert_used_sess(remote)) { |
| 1445 | tlv->client |= PP2_CLIENT_CERT_SESS; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1446 | tlv->verify = htonl(ssl_sock_get_verify_result(remote)); |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 1447 | if (ssl_sock_get_cert_used_conn(remote)) |
| 1448 | tlv->client |= PP2_CLIENT_CERT_CONN; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1449 | } |
| 1450 | if (srv->pp_opts & SRV_PP_V2_SSL_CN) { |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1451 | struct buffer *cn_trash = get_trash_chunk(); |
Willy Tarreau | 3b9a0c9 | 2014-07-19 06:37:33 +0200 | [diff] [blame] | 1452 | if (ssl_sock_get_remote_common_name(remote, cn_trash) > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1453 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_CN, |
| 1454 | cn_trash->data, |
| 1455 | cn_trash->area); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1456 | } |
| 1457 | } |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1458 | if (srv->pp_opts & SRV_PP_V2_SSL_KEY_ALG) { |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1459 | struct buffer *pkey_trash = get_trash_chunk(); |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1460 | if (ssl_sock_get_pkey_algo(remote, pkey_trash) > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1461 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_KEY_ALG, |
| 1462 | pkey_trash->data, |
| 1463 | pkey_trash->area); |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1464 | } |
| 1465 | } |
| 1466 | if (srv->pp_opts & SRV_PP_V2_SSL_SIG_ALG) { |
| 1467 | value = ssl_sock_get_cert_sig(remote); |
| 1468 | if (value) { |
| 1469 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_SIG_ALG, strlen(value), value); |
| 1470 | } |
| 1471 | } |
| 1472 | if (srv->pp_opts & SRV_PP_V2_SSL_CIPHER) { |
| 1473 | value = ssl_sock_get_cipher_name(remote); |
| 1474 | if (value) { |
| 1475 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_CIPHER, strlen(value), value); |
| 1476 | } |
| 1477 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1478 | } |
| 1479 | tlv->tlv.length_hi = (uint16_t)(ssl_tlv_len - sizeof(struct tlv)) >> 8; |
| 1480 | tlv->tlv.length_lo = (uint16_t)(ssl_tlv_len - sizeof(struct tlv)) & 0x00ff; |
| 1481 | ret += ssl_tlv_len; |
| 1482 | } |
| 1483 | #endif |
| 1484 | |
Willy Tarreau | e573323 | 2019-05-22 19:24:06 +0200 | [diff] [blame] | 1485 | #ifdef USE_NS |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1486 | if (remote && (remote->proxy_netns)) { |
| 1487 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1488 | return 0; |
Emmanuel Hocdet | 571c7ac | 2017-10-31 18:24:05 +0100 | [diff] [blame] | 1489 | 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] | 1490 | } |
| 1491 | #endif |
| 1492 | |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1493 | hdr->len = htons((uint16_t)(ret - PP2_HEADER_LEN)); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1494 | |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1495 | if (tlv_crc32c_p) { |
| 1496 | write_u32(tlv_crc32c_p, htonl(hash_crc32c(buf, ret))); |
| 1497 | } |
| 1498 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1499 | return ret; |
| 1500 | } |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1501 | |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1502 | /* return the major HTTP version as 1 or 2 depending on how the request arrived |
| 1503 | * before being processed. |
| 1504 | */ |
| 1505 | static int |
| 1506 | smp_fetch_fc_http_major(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1507 | { |
Jérôme Magnin | 8657742 | 2018-12-07 09:03:11 +0100 | [diff] [blame] | 1508 | struct connection *conn = (kw[0] != 'b') ? objt_conn(smp->sess->origin) : |
| 1509 | smp->strm ? cs_conn(objt_cs(smp->strm->si[1].end)) : NULL; |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1510 | |
| 1511 | smp->data.type = SMP_T_SINT; |
| 1512 | smp->data.u.sint = (conn && strcmp(conn_get_mux_name(conn), "H2") == 0) ? 2 : 1; |
| 1513 | return 1; |
| 1514 | } |
| 1515 | |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1516 | /* fetch if the received connection used a PROXY protocol header */ |
| 1517 | int smp_fetch_fc_rcvd_proxy(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1518 | { |
| 1519 | struct connection *conn; |
| 1520 | |
| 1521 | conn = objt_conn(smp->sess->origin); |
| 1522 | if (!conn) |
| 1523 | return 0; |
| 1524 | |
| 1525 | if (!(conn->flags & CO_FL_CONNECTED)) { |
| 1526 | smp->flags |= SMP_F_MAY_CHANGE; |
| 1527 | return 0; |
| 1528 | } |
| 1529 | |
| 1530 | smp->flags = 0; |
| 1531 | smp->data.type = SMP_T_BOOL; |
| 1532 | smp->data.u.sint = (conn->flags & CO_FL_RCVD_PROXY) ? 1 : 0; |
| 1533 | |
| 1534 | return 1; |
| 1535 | } |
| 1536 | |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 1537 | /* fetch the authority TLV from a PROXY protocol header */ |
| 1538 | int smp_fetch_fc_pp_authority(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1539 | { |
| 1540 | struct connection *conn; |
| 1541 | |
| 1542 | conn = objt_conn(smp->sess->origin); |
| 1543 | if (!conn) |
| 1544 | return 0; |
| 1545 | |
| 1546 | if (!(conn->flags & CO_FL_CONNECTED)) { |
| 1547 | smp->flags |= SMP_F_MAY_CHANGE; |
| 1548 | return 0; |
| 1549 | } |
| 1550 | |
| 1551 | if (conn->proxy_authority == NULL) |
| 1552 | return 0; |
| 1553 | |
| 1554 | smp->flags = 0; |
| 1555 | smp->data.type = SMP_T_STR; |
| 1556 | smp->data.u.str.area = conn->proxy_authority; |
| 1557 | smp->data.u.str.data = conn->proxy_authority_len; |
| 1558 | |
| 1559 | return 1; |
| 1560 | } |
| 1561 | |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1562 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1563 | * Note: fetches that may return multiple types must be declared as the lowest |
| 1564 | * common denominator, the type that can be casted into all other ones. For |
| 1565 | * instance v4/v6 must be declared v4. |
| 1566 | */ |
| 1567 | static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, { |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1568 | { "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] | 1569 | { "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] | 1570 | { "fc_rcvd_proxy", smp_fetch_fc_rcvd_proxy, 0, NULL, SMP_T_BOOL, SMP_USE_L4CLI }, |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 1571 | { "fc_pp_authority", smp_fetch_fc_pp_authority, 0, NULL, SMP_T_STR, SMP_USE_L4CLI }, |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1572 | { /* END */ }, |
| 1573 | }}; |
| 1574 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1575 | INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords); |