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 | |
Olivier Houchard | 477902b | 2020-01-22 18:08:48 +0100 | [diff] [blame] | 44 | int conn_create_mux(struct connection *conn) |
| 45 | { |
Olivier Houchard | 477902b | 2020-01-22 18:08:48 +0100 | [diff] [blame] | 46 | if (conn_is_back(conn)) { |
| 47 | struct server *srv; |
| 48 | struct conn_stream *cs = conn->ctx; |
| 49 | |
| 50 | if (conn->flags & CO_FL_ERROR) |
| 51 | goto fail; |
Olivier Houchard | a8a415d | 2020-01-23 13:15:14 +0100 | [diff] [blame] | 52 | |
Olivier Houchard | 477902b | 2020-01-22 18:08:48 +0100 | [diff] [blame] | 53 | if (conn_install_mux_be(conn, conn->ctx, conn->owner) < 0) |
| 54 | goto fail; |
| 55 | srv = objt_server(conn->target); |
| 56 | if (srv && ((srv->proxy->options & PR_O_REUSE_MASK) != PR_O_REUSE_NEVR) && |
| 57 | conn->mux->avail_streams(conn) > 0) |
| 58 | LIST_ADD(&srv->idle_conns[tid], &conn->list); |
| 59 | return 0; |
| 60 | fail: |
| 61 | /* let the upper layer know the connection failed */ |
| 62 | cs->data_cb->wake(cs); |
| 63 | return -1; |
| 64 | } else |
| 65 | return conn_complete_session(conn); |
| 66 | |
| 67 | } |
| 68 | |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 69 | /* 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] | 70 | * provided by the connection's sock_ops, which must be valid. |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 71 | */ |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 72 | void conn_fd_handler(int fd) |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 73 | { |
Willy Tarreau | 8018471 | 2012-07-06 14:54:49 +0200 | [diff] [blame] | 74 | struct connection *conn = fdtab[fd].owner; |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 75 | unsigned int flags; |
Olivier Houchard | af4021e | 2018-08-09 13:06:55 +0200 | [diff] [blame] | 76 | int io_available = 0; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 77 | |
Willy Tarreau | d80cb4e | 2018-01-20 19:30:13 +0100 | [diff] [blame] | 78 | if (unlikely(!conn)) { |
| 79 | activity[tid].conn_dead++; |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 80 | return; |
Willy Tarreau | d80cb4e | 2018-01-20 19:30:13 +0100 | [diff] [blame] | 81 | } |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 82 | |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 83 | conn->flags |= CO_FL_WILL_UPDATE; |
| 84 | |
Willy Tarreau | 7d28149 | 2012-12-16 19:19:13 +0100 | [diff] [blame] | 85 | 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] | 86 | |
Willy Tarreau | b2a7ab0 | 2019-12-27 10:54:22 +0100 | [diff] [blame] | 87 | if (unlikely(conn->flags & CO_FL_WAIT_L4_CONN) && |
| 88 | ((fd_send_ready(fd) && fd_send_active(fd)) || |
| 89 | (fd_recv_ready(fd) && fd_recv_active(fd)))) { |
| 90 | /* Still waiting for a connection to establish and nothing was |
| 91 | * attempted yet to probe the connection. this will clear the |
| 92 | * CO_FL_WAIT_L4_CONN flag on success. |
| 93 | */ |
| 94 | if (!conn_fd_check(conn)) |
| 95 | goto leave; |
| 96 | } |
| 97 | |
Willy Tarreau | 8081abe | 2019-11-28 18:08:49 +0100 | [diff] [blame] | 98 | if (fd_send_ready(fd) && fd_send_active(fd)) { |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 99 | /* force reporting of activity by clearing the previous flags : |
| 100 | * we'll have at least ERROR or CONNECTED at the end of an I/O, |
| 101 | * both of which will be detected below. |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 102 | */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 103 | flags = 0; |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 104 | if (conn->subs && conn->subs->events & SUB_RETRY_SEND) { |
| 105 | tasklet_wakeup(conn->subs->tasklet); |
| 106 | conn->subs->events &= ~SUB_RETRY_SEND; |
| 107 | if (!conn->subs->events) |
| 108 | conn->subs = NULL; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 109 | } else |
| 110 | io_available = 1; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 111 | __conn_xprt_stop_send(conn); |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 112 | } |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 113 | |
Willy Tarreau | 57ec32f | 2017-04-11 19:59:33 +0200 | [diff] [blame] | 114 | /* The data transfer starts here and stops on error and handshakes. Note |
| 115 | * that we must absolutely test conn->xprt at each step in case it suddenly |
| 116 | * changes due to a quick unexpected close(). |
| 117 | */ |
Willy Tarreau | 8081abe | 2019-11-28 18:08:49 +0100 | [diff] [blame] | 118 | if (fd_recv_ready(fd) && fd_recv_active(fd)) { |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 119 | /* force reporting of activity by clearing the previous flags : |
| 120 | * we'll have at least ERROR or CONNECTED at the end of an I/O, |
| 121 | * both of which will be detected below. |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 122 | */ |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 123 | flags = 0; |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 124 | if (conn->subs && conn->subs->events & SUB_RETRY_RECV) { |
| 125 | tasklet_wakeup(conn->subs->tasklet); |
| 126 | conn->subs->events &= ~SUB_RETRY_RECV; |
| 127 | if (!conn->subs->events) |
| 128 | conn->subs = NULL; |
Olivier Houchard | fa8aa86 | 2018-10-10 18:25:41 +0200 | [diff] [blame] | 129 | } else |
| 130 | io_available = 1; |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 131 | __conn_xprt_stop_recv(conn); |
Willy Tarreau | 9e272bf | 2012-10-03 21:04:48 +0200 | [diff] [blame] | 132 | } |
Willy Tarreau | 2da156f | 2012-07-23 15:07:23 +0200 | [diff] [blame] | 133 | |
Willy Tarreau | 2c6be84 | 2012-07-06 17:12:34 +0200 | [diff] [blame] | 134 | leave: |
Olivier Houchard | 477902b | 2020-01-22 18:08:48 +0100 | [diff] [blame] | 135 | /* If we don't yet have a mux, that means we were waiting for |
| 136 | * informations to create one, typically from the ALPN. If we're |
| 137 | * done with the handshake, attempt to create one. |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 138 | */ |
Olivier Houchard | 477902b | 2020-01-22 18:08:48 +0100 | [diff] [blame] | 139 | if (unlikely(!conn->mux) && !(conn->flags & CO_FL_HANDSHAKE)) |
| 140 | if (conn_create_mux(conn) < 0) |
| 141 | return; |
Willy Tarreau | 8e3c6ce | 2017-08-28 15:46:01 +0200 | [diff] [blame] | 142 | |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 143 | /* The wake callback is normally used to notify the data layer about |
| 144 | * data layer activity (successful send/recv), connection establishment, |
| 145 | * shutdown and fatal errors. We need to consider the following |
| 146 | * situations to wake up the data layer : |
Willy Tarreau | 0fbc318 | 2019-12-27 14:57:45 +0100 | [diff] [blame] | 147 | * - change among the CO_FL_NOTIFY_DONE flags : |
| 148 | * SOCK_{RD,WR}_SH, ERROR, |
Willy Tarreau | 3c0cc49 | 2017-03-19 07:54:28 +0100 | [diff] [blame] | 149 | * - absence of any of {L4,L6}_CONN and CONNECTED, indicating the |
| 150 | * end of handshake and transition to CONNECTED |
| 151 | * - raise of CONNECTED with HANDSHAKE down |
| 152 | * - end of HANDSHAKE with CONNECTED set |
| 153 | * - regular data layer activity |
| 154 | * |
| 155 | * Note that the wake callback is allowed to release the connection and |
| 156 | * the fd (and return < 0 in this case). |
Willy Tarreau | 2396c1c | 2012-10-03 21:12:16 +0200 | [diff] [blame] | 157 | */ |
Willy Tarreau | 0fbc318 | 2019-12-27 14:57:45 +0100 | [diff] [blame] | 158 | if ((io_available || (((conn->flags ^ flags) & CO_FL_NOTIFY_DONE) || |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 159 | ((flags & (CO_FL_WAIT_L4L6|CO_FL_HANDSHAKE)) && |
| 160 | (conn->flags & (CO_FL_WAIT_L4L6|CO_FL_HANDSHAKE)) == 0))) && |
Olivier Houchard | fe50bfb | 2019-05-27 12:09:19 +0200 | [diff] [blame] | 161 | conn->mux && conn->mux->wake && conn->mux->wake(conn) < 0) |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 162 | return; |
Willy Tarreau | fd31e53 | 2012-07-23 18:24:25 +0200 | [diff] [blame] | 163 | |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 164 | /* commit polling changes */ |
Willy Tarreau | 916e12d | 2017-10-25 09:22:43 +0200 | [diff] [blame] | 165 | conn->flags &= ~CO_FL_WILL_UPDATE; |
Willy Tarreau | f9dabec | 2012-08-17 17:33:53 +0200 | [diff] [blame] | 166 | conn_cond_update_polling(conn); |
Willy Tarreau | 7a798e5 | 2016-04-14 11:13:20 +0200 | [diff] [blame] | 167 | return; |
Willy Tarreau | 59f9839 | 2012-07-06 14:13:49 +0200 | [diff] [blame] | 168 | } |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 169 | |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 170 | /* Update polling on connection <c>'s file descriptor depending on its current |
Willy Tarreau | 3381bf8 | 2020-01-17 17:39:35 +0100 | [diff] [blame] | 171 | * state as reported in the connection's CO_FL_XPRT_* flags. The connection |
| 172 | * flags are updated with the new flags at the end of the operation. Polling |
| 173 | * is totally disabled if an error was reported. |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 174 | */ |
Olivier Houchard | 1a0545f | 2017-09-13 18:30:23 +0200 | [diff] [blame] | 175 | void conn_update_xprt_polling(struct connection *c) |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 176 | { |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 177 | unsigned int f = c->flags; |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 178 | |
Willy Tarreau | 3c72872 | 2014-01-23 13:50:42 +0100 | [diff] [blame] | 179 | if (!conn_ctrl_ready(c)) |
Willy Tarreau | f79c817 | 2013-10-21 16:30:56 +0200 | [diff] [blame] | 180 | return; |
| 181 | |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 182 | /* update read status if needed */ |
Willy Tarreau | 3381bf8 | 2020-01-17 17:39:35 +0100 | [diff] [blame] | 183 | if (f & CO_FL_XPRT_RD_ENA) |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 184 | fd_want_recv(c->handle.fd); |
Willy Tarreau | 3381bf8 | 2020-01-17 17:39:35 +0100 | [diff] [blame] | 185 | else |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 186 | fd_stop_recv(c->handle.fd); |
Willy Tarreau | b5e2cbd | 2012-08-17 11:55:04 +0200 | [diff] [blame] | 187 | |
| 188 | /* update write status if needed */ |
Willy Tarreau | 3381bf8 | 2020-01-17 17:39:35 +0100 | [diff] [blame] | 189 | if (f & CO_FL_XPRT_WR_ENA) |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 190 | fd_want_send(c->handle.fd); |
Willy Tarreau | 3381bf8 | 2020-01-17 17:39:35 +0100 | [diff] [blame] | 191 | else |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 192 | fd_stop_send(c->handle.fd); |
Willy Tarreau | e9dfa79 | 2012-09-01 17:26:16 +0200 | [diff] [blame] | 193 | } |
| 194 | |
Willy Tarreau | 4970e5a | 2019-12-27 10:40:21 +0100 | [diff] [blame] | 195 | /* This is the callback which is set when a connection establishment is pending |
| 196 | * and we have nothing to send. It may update the FD polling status to indicate |
| 197 | * !READY. It returns 0 if it fails in a fatal way or needs to poll to go |
| 198 | * further, otherwise it returns non-zero and removes the CO_FL_WAIT_L4_CONN |
| 199 | * flag from the connection's flags. In case of error, it sets CO_FL_ERROR and |
| 200 | * leaves the error code in errno. |
| 201 | */ |
| 202 | int conn_fd_check(struct connection *conn) |
| 203 | { |
| 204 | struct sockaddr_storage *addr; |
| 205 | int fd = conn->handle.fd; |
| 206 | |
| 207 | if (conn->flags & CO_FL_ERROR) |
| 208 | return 0; |
| 209 | |
| 210 | if (!conn_ctrl_ready(conn)) |
| 211 | return 0; |
| 212 | |
| 213 | if (!(conn->flags & CO_FL_WAIT_L4_CONN)) |
| 214 | return 1; /* strange we were called while ready */ |
| 215 | |
| 216 | if (!fd_send_ready(fd)) |
| 217 | return 0; |
| 218 | |
| 219 | /* Here we have 2 cases : |
| 220 | * - modern pollers, able to report ERR/HUP. If these ones return any |
| 221 | * of these flags then it's likely a failure, otherwise it possibly |
| 222 | * is a success (i.e. there may have been data received just before |
| 223 | * the error was reported). |
| 224 | * - select, which doesn't report these and with which it's always |
| 225 | * necessary either to try connect() again or to check for SO_ERROR. |
| 226 | * In order to simplify everything, we double-check using connect() as |
| 227 | * soon as we meet either of these delicate situations. Note that |
| 228 | * SO_ERROR would clear the error after reporting it! |
| 229 | */ |
| 230 | if (cur_poller.flags & HAP_POLL_F_ERRHUP) { |
| 231 | /* modern poller, able to report ERR/HUP */ |
| 232 | if ((fdtab[fd].ev & (FD_POLL_IN|FD_POLL_ERR|FD_POLL_HUP)) == FD_POLL_IN) |
| 233 | goto done; |
| 234 | if ((fdtab[fd].ev & (FD_POLL_OUT|FD_POLL_ERR|FD_POLL_HUP)) == FD_POLL_OUT) |
| 235 | goto done; |
| 236 | if (!(fdtab[fd].ev & (FD_POLL_ERR|FD_POLL_HUP))) |
| 237 | goto wait; |
| 238 | /* error present, fall through common error check path */ |
| 239 | } |
| 240 | |
| 241 | /* Use connect() to check the state of the socket. This has the double |
| 242 | * advantage of *not* clearing the error (so that health checks can |
| 243 | * still use getsockopt(SO_ERROR)) and giving us the following info : |
| 244 | * - error |
| 245 | * - connecting (EALREADY, EINPROGRESS) |
| 246 | * - connected (EISCONN, 0) |
| 247 | */ |
| 248 | addr = conn->dst; |
| 249 | if ((conn->flags & CO_FL_SOCKS4) && obj_type(conn->target) == OBJ_TYPE_SERVER) |
| 250 | addr = &objt_server(conn->target)->socks4_addr; |
| 251 | |
| 252 | if (connect(fd, (const struct sockaddr *)addr, get_addr_len(addr)) == -1) { |
| 253 | if (errno == EALREADY || errno == EINPROGRESS) |
| 254 | goto wait; |
| 255 | |
| 256 | if (errno && errno != EISCONN) |
| 257 | goto out_error; |
| 258 | } |
| 259 | |
| 260 | done: |
| 261 | /* The FD is ready now, we'll mark the connection as complete and |
| 262 | * forward the event to the transport layer which will notify the |
| 263 | * data layer. |
| 264 | */ |
| 265 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 266 | fd_may_send(fd); |
| 267 | fd_cond_recv(fd); |
| 268 | errno = 0; // make health checks happy |
| 269 | return 1; |
| 270 | |
| 271 | out_error: |
| 272 | /* Write error on the file descriptor. Report it to the connection |
| 273 | * and disable polling on this FD. |
| 274 | */ |
| 275 | fdtab[fd].linger_risk = 0; |
| 276 | conn->flags |= CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
| 277 | __conn_xprt_stop_both(conn); |
| 278 | return 0; |
| 279 | |
| 280 | wait: |
| 281 | __conn_xprt_want_send(conn); |
| 282 | fd_cant_send(fd); |
| 283 | return 0; |
| 284 | } |
| 285 | |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 286 | /* Send a message over an established connection. It makes use of send() and |
| 287 | * returns the same return code and errno. If the socket layer is not ready yet |
| 288 | * then -1 is returned and ENOTSOCK is set into errno. If the fd is not marked |
| 289 | * as ready, or if EAGAIN or ENOTCONN is returned, then we return 0. It returns |
| 290 | * EMSGSIZE if called with a zero length message. The purpose is to simplify |
| 291 | * some rare attempts to directly write on the socket from above the connection |
| 292 | * (typically send_proxy). In case of EAGAIN, the fd is marked as "cant_send". |
| 293 | * It automatically retries on EINTR. Other errors cause the connection to be |
| 294 | * marked as in error state. It takes similar arguments as send() except the |
| 295 | * first one which is the connection instead of the file descriptor. Note, |
| 296 | * MSG_DONTWAIT and MSG_NOSIGNAL are forced on the flags. |
| 297 | */ |
| 298 | int conn_sock_send(struct connection *conn, const void *buf, int len, int flags) |
| 299 | { |
| 300 | int ret; |
| 301 | |
| 302 | ret = -1; |
| 303 | errno = ENOTSOCK; |
| 304 | |
| 305 | if (conn->flags & CO_FL_SOCK_WR_SH) |
| 306 | goto fail; |
| 307 | |
| 308 | if (!conn_ctrl_ready(conn)) |
| 309 | goto fail; |
| 310 | |
| 311 | errno = EMSGSIZE; |
| 312 | if (!len) |
| 313 | goto fail; |
| 314 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 315 | if (!fd_send_ready(conn->handle.fd)) |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 316 | goto wait; |
| 317 | |
| 318 | do { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 319 | ret = send(conn->handle.fd, buf, len, flags | MSG_DONTWAIT | MSG_NOSIGNAL); |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 320 | } while (ret < 0 && errno == EINTR); |
| 321 | |
| 322 | |
Willy Tarreau | ccf3f6d | 2019-09-05 17:05:05 +0200 | [diff] [blame] | 323 | if (ret > 0) { |
| 324 | if (conn->flags & CO_FL_WAIT_L4_CONN) { |
| 325 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 326 | fd_may_send(conn->handle.fd); |
| 327 | fd_cond_recv(conn->handle.fd); |
| 328 | } |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 329 | return ret; |
Willy Tarreau | ccf3f6d | 2019-09-05 17:05:05 +0200 | [diff] [blame] | 330 | } |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 331 | |
| 332 | if (ret == 0 || errno == EAGAIN || errno == ENOTCONN) { |
| 333 | wait: |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 334 | fd_cant_send(conn->handle.fd); |
Willy Tarreau | ff3e648 | 2015-03-12 23:56:52 +0100 | [diff] [blame] | 335 | return 0; |
| 336 | } |
| 337 | fail: |
| 338 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH | CO_FL_ERROR; |
| 339 | return ret; |
| 340 | } |
| 341 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 342 | /* Called from the upper layer, to subscribe <es> to events <event_type>. The |
| 343 | * event subscriber <es> is not allowed to change from a previous call as long |
| 344 | * as at least one event is still subscribed. The <event_type> must only be a |
| 345 | * combination of SUB_RETRY_RECV and SUB_RETRY_SEND. It always returns 0. |
| 346 | */ |
| 347 | int conn_unsubscribe(struct connection *conn, void *xprt_ctx, int event_type, struct wait_event *es) |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 348 | { |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 349 | BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV)); |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 350 | BUG_ON(conn->subs && conn->subs != es); |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 351 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 352 | es->events &= ~event_type; |
| 353 | if (!es->events) |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 354 | conn->subs = NULL; |
| 355 | |
| 356 | if (event_type & SUB_RETRY_RECV) |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 357 | __conn_xprt_stop_recv(conn); |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 358 | |
| 359 | if (event_type & SUB_RETRY_SEND) |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 360 | __conn_xprt_stop_send(conn); |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 361 | |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 362 | conn_update_xprt_polling(conn); |
Olivier Houchard | 83a0cd8 | 2018-09-28 17:57:58 +0200 | [diff] [blame] | 363 | return 0; |
| 364 | } |
| 365 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 366 | /* Called from the upper layer, to unsubscribe <es> from events <event_type> |
| 367 | * (undo fcgi_subscribe). The <es> struct is not allowed to differ from the one |
| 368 | * passed to the subscribe() call. It always returns zero. |
| 369 | */ |
| 370 | int conn_subscribe(struct connection *conn, void *xprt_ctx, int event_type, struct wait_event *es) |
Olivier Houchard | 6ff2039 | 2018-07-17 18:46:31 +0200 | [diff] [blame] | 371 | { |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 372 | BUG_ON(event_type & ~(SUB_RETRY_SEND|SUB_RETRY_RECV)); |
| 373 | BUG_ON(conn->subs && conn->subs->events & event_type); |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 374 | BUG_ON(conn->subs && conn->subs != es); |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 375 | |
Willy Tarreau | ee1a6fc | 2020-01-17 07:52:13 +0100 | [diff] [blame] | 376 | conn->subs = es; |
| 377 | es->events |= event_type; |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 378 | |
| 379 | if (event_type & SUB_RETRY_RECV) |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 380 | __conn_xprt_want_recv(conn); |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 381 | |
| 382 | if (event_type & SUB_RETRY_SEND) |
Olivier Houchard | 53216e7 | 2018-10-10 15:46:36 +0200 | [diff] [blame] | 383 | __conn_xprt_want_send(conn); |
Willy Tarreau | 7872d1f | 2020-01-10 07:06:05 +0100 | [diff] [blame] | 384 | |
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 | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 530 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 531 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 532 | if (trash.data < 6) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 533 | goto missing; |
| 534 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 535 | line = trash.area; |
| 536 | end = trash.area + trash.data; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 537 | |
| 538 | /* Decode a possible proxy request, fail early if it does not match */ |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 539 | if (strncmp(line, "PROXY ", 6) != 0) |
| 540 | goto not_v1; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 541 | |
| 542 | line += 6; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 543 | if (trash.data < 9) /* shortest possible line */ |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 544 | goto missing; |
| 545 | |
David CARLIER | 42ff05e | 2016-03-24 09:22:36 +0000 | [diff] [blame] | 546 | if (memcmp(line, "TCP4 ", 5) == 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 547 | u32 src3, dst3, sport, dport; |
| 548 | |
| 549 | line += 5; |
| 550 | |
| 551 | src3 = inetaddr_host_lim_ret(line, end, &line); |
| 552 | if (line == end) |
| 553 | goto missing; |
| 554 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 555 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 556 | |
| 557 | dst3 = inetaddr_host_lim_ret(line, end, &line); |
| 558 | if (line == end) |
| 559 | goto missing; |
| 560 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 561 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 562 | |
| 563 | sport = read_uint((const char **)&line, end); |
| 564 | if (line == end) |
| 565 | goto missing; |
| 566 | if (*line++ != ' ') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 567 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 568 | |
| 569 | dport = read_uint((const char **)&line, end); |
| 570 | if (line > end - 2) |
| 571 | goto missing; |
| 572 | if (*line++ != '\r') |
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 | if (*line++ != '\n') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 575 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 576 | |
| 577 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 578 | ((struct sockaddr_in *)conn->src)->sin_family = AF_INET; |
| 579 | ((struct sockaddr_in *)conn->src)->sin_addr.s_addr = htonl(src3); |
| 580 | ((struct sockaddr_in *)conn->src)->sin_port = htons(sport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 581 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 582 | ((struct sockaddr_in *)conn->dst)->sin_family = AF_INET; |
| 583 | ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr = htonl(dst3); |
| 584 | ((struct sockaddr_in *)conn->dst)->sin_port = htons(dport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 585 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 586 | } |
David CARLIER | 42ff05e | 2016-03-24 09:22:36 +0000 | [diff] [blame] | 587 | else if (memcmp(line, "TCP6 ", 5) == 0) { |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 588 | u32 sport, dport; |
| 589 | char *src_s; |
| 590 | char *dst_s, *sport_s, *dport_s; |
| 591 | struct in6_addr src3, dst3; |
| 592 | |
| 593 | line += 5; |
| 594 | |
| 595 | src_s = line; |
| 596 | dst_s = sport_s = dport_s = NULL; |
| 597 | while (1) { |
| 598 | if (line > end - 2) { |
| 599 | goto missing; |
| 600 | } |
| 601 | else if (*line == '\r') { |
| 602 | *line = 0; |
| 603 | line++; |
| 604 | if (*line++ != '\n') |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 605 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 606 | break; |
| 607 | } |
| 608 | |
| 609 | if (*line == ' ') { |
| 610 | *line = 0; |
| 611 | if (!dst_s) |
| 612 | dst_s = line + 1; |
| 613 | else if (!sport_s) |
| 614 | sport_s = line + 1; |
| 615 | else if (!dport_s) |
| 616 | dport_s = line + 1; |
| 617 | } |
| 618 | line++; |
| 619 | } |
| 620 | |
| 621 | if (!dst_s || !sport_s || !dport_s) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 622 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 623 | |
| 624 | sport = read_uint((const char **)&sport_s,dport_s - 1); |
| 625 | if (*sport_s != 0) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 626 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 627 | |
| 628 | dport = read_uint((const char **)&dport_s,line - 2); |
| 629 | if (*dport_s != 0) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 630 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 631 | |
| 632 | if (inet_pton(AF_INET6, src_s, (void *)&src3) != 1) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 633 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 634 | |
| 635 | if (inet_pton(AF_INET6, dst_s, (void *)&dst3) != 1) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 636 | goto bad_header; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 637 | |
| 638 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 639 | ((struct sockaddr_in6 *)conn->src)->sin6_family = AF_INET6; |
| 640 | memcpy(&((struct sockaddr_in6 *)conn->src)->sin6_addr, &src3, sizeof(struct in6_addr)); |
| 641 | ((struct sockaddr_in6 *)conn->src)->sin6_port = htons(sport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 642 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 643 | ((struct sockaddr_in6 *)conn->dst)->sin6_family = AF_INET6; |
| 644 | memcpy(&((struct sockaddr_in6 *)conn->dst)->sin6_addr, &dst3, sizeof(struct in6_addr)); |
| 645 | ((struct sockaddr_in6 *)conn->dst)->sin6_port = htons(dport); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 646 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 647 | } |
Willy Tarreau | 4c20d29 | 2014-06-14 11:41:36 +0200 | [diff] [blame] | 648 | else if (memcmp(line, "UNKNOWN\r\n", 9) == 0) { |
| 649 | /* This can be a UNIX socket forwarded by an haproxy upstream */ |
| 650 | line += 9; |
| 651 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 652 | else { |
Willy Tarreau | 4c20d29 | 2014-06-14 11:41:36 +0200 | [diff] [blame] | 653 | /* The protocol does not match something known (TCP4/TCP6/UNKNOWN) */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 654 | conn->err_code = CO_ER_PRX_BAD_PROTO; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 655 | goto fail; |
| 656 | } |
| 657 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 658 | trash.data = line - trash.area; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 659 | goto eat_header; |
| 660 | |
| 661 | not_v1: |
| 662 | /* try PPv2 */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 663 | if (trash.data < PP2_HEADER_LEN) |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 664 | goto missing; |
| 665 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 666 | hdr_v2 = (struct proxy_hdr_v2 *) trash.area; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 667 | |
| 668 | if (memcmp(hdr_v2->sig, v2sig, PP2_SIGNATURE_LEN) != 0 || |
| 669 | (hdr_v2->ver_cmd & PP2_VERSION_MASK) != PP2_VERSION) { |
| 670 | conn->err_code = CO_ER_PRX_NOT_HDR; |
| 671 | goto fail; |
| 672 | } |
| 673 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 674 | if (trash.data < PP2_HEADER_LEN + ntohs(hdr_v2->len)) |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 675 | goto missing; |
| 676 | |
| 677 | switch (hdr_v2->ver_cmd & PP2_CMD_MASK) { |
| 678 | case 0x01: /* PROXY command */ |
| 679 | switch (hdr_v2->fam) { |
| 680 | case 0x11: /* TCPv4 */ |
KOVACS Krisztian | efd3aa9 | 2014-11-19 10:53:20 +0100 | [diff] [blame] | 681 | if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET) |
| 682 | goto bad_header; |
| 683 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 684 | ((struct sockaddr_in *)conn->src)->sin_family = AF_INET; |
| 685 | ((struct sockaddr_in *)conn->src)->sin_addr.s_addr = hdr_v2->addr.ip4.src_addr; |
| 686 | ((struct sockaddr_in *)conn->src)->sin_port = hdr_v2->addr.ip4.src_port; |
| 687 | ((struct sockaddr_in *)conn->dst)->sin_family = AF_INET; |
| 688 | ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr = hdr_v2->addr.ip4.dst_addr; |
| 689 | ((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] | 690 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 691 | tlv_offset = PP2_HEADER_LEN + PP2_ADDR_LEN_INET; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 692 | tlv_length = ntohs(hdr_v2->len) - PP2_ADDR_LEN_INET; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 693 | break; |
| 694 | case 0x21: /* TCPv6 */ |
KOVACS Krisztian | efd3aa9 | 2014-11-19 10:53:20 +0100 | [diff] [blame] | 695 | if (ntohs(hdr_v2->len) < PP2_ADDR_LEN_INET6) |
| 696 | goto bad_header; |
| 697 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 698 | ((struct sockaddr_in6 *)conn->src)->sin6_family = AF_INET6; |
| 699 | memcpy(&((struct sockaddr_in6 *)conn->src)->sin6_addr, hdr_v2->addr.ip6.src_addr, 16); |
| 700 | ((struct sockaddr_in6 *)conn->src)->sin6_port = hdr_v2->addr.ip6.src_port; |
| 701 | ((struct sockaddr_in6 *)conn->dst)->sin6_family = AF_INET6; |
| 702 | memcpy(&((struct sockaddr_in6 *)conn->dst)->sin6_addr, hdr_v2->addr.ip6.dst_addr, 16); |
| 703 | ((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] | 704 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
KOVACS Krisztian | 7209c20 | 2015-07-03 14:09:10 +0200 | [diff] [blame] | 705 | tlv_offset = PP2_HEADER_LEN + PP2_ADDR_LEN_INET6; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 706 | tlv_length = ntohs(hdr_v2->len) - PP2_ADDR_LEN_INET6; |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 707 | break; |
| 708 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 709 | |
| 710 | /* TLV parsing */ |
| 711 | if (tlv_length > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 712 | while (tlv_offset + TLV_HEADER_SIZE <= trash.data) { |
| 713 | const struct tlv *tlv_packet = (struct tlv *) &trash.area[tlv_offset]; |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 714 | const int tlv_len = get_tlv_length(tlv_packet); |
| 715 | tlv_offset += tlv_len + TLV_HEADER_SIZE; |
| 716 | |
| 717 | switch (tlv_packet->type) { |
Emmanuel Hocdet | 115df3e | 2018-02-05 16:23:23 +0100 | [diff] [blame] | 718 | case PP2_TYPE_CRC32C: { |
| 719 | void *tlv_crc32c_p = (void *)tlv_packet->value; |
| 720 | uint32_t n_crc32c = ntohl(read_u32(tlv_crc32c_p)); |
| 721 | write_u32(tlv_crc32c_p, 0); |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 722 | 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] | 723 | goto bad_header; |
| 724 | break; |
| 725 | } |
Willy Tarreau | e573323 | 2019-05-22 19:24:06 +0200 | [diff] [blame] | 726 | #ifdef USE_NS |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 727 | case PP2_TYPE_NETNS: { |
| 728 | const struct netns_entry *ns; |
| 729 | ns = netns_store_lookup((char*)tlv_packet->value, tlv_len); |
| 730 | if (ns) |
| 731 | conn->proxy_netns = ns; |
| 732 | break; |
| 733 | } |
| 734 | #endif |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 735 | case PP2_TYPE_AUTHORITY: { |
| 736 | if (tlv_len > PP2_AUTHORITY_MAX) |
| 737 | goto bad_header; |
| 738 | conn->proxy_authority = pool_alloc(pool_head_authority); |
| 739 | if (conn->proxy_authority == NULL) |
| 740 | goto fail; |
| 741 | memcpy(conn->proxy_authority, (const char *)tlv_packet->value, tlv_len); |
| 742 | conn->proxy_authority_len = tlv_len; |
| 743 | break; |
| 744 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 745 | default: |
| 746 | break; |
| 747 | } |
| 748 | } |
| 749 | } |
| 750 | |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 751 | /* unsupported protocol, keep local connection address */ |
| 752 | break; |
| 753 | case 0x00: /* LOCAL command */ |
| 754 | /* keep local connection address for LOCAL */ |
| 755 | break; |
| 756 | default: |
| 757 | goto bad_header; /* not a supported command */ |
| 758 | } |
| 759 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 760 | trash.data = PP2_HEADER_LEN + ntohs(hdr_v2->len); |
Willy Tarreau | 7799267 | 2014-06-14 11:06:17 +0200 | [diff] [blame] | 761 | goto eat_header; |
| 762 | |
| 763 | eat_header: |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 764 | /* remove the PROXY line from the request. For this we re-read the |
| 765 | * exact line at once. If we don't get the exact same result, we |
| 766 | * fail. |
| 767 | */ |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 768 | do { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 769 | int len2 = recv(conn->handle.fd, trash.area, trash.data, 0); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 770 | if (len2 < 0 && errno == EINTR) |
| 771 | continue; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 772 | if (len2 != trash.data) |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 773 | goto recv_abort; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 774 | } while (0); |
| 775 | |
| 776 | conn->flags &= ~flag; |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 777 | conn->flags |= CO_FL_RCVD_PROXY; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 778 | return 1; |
| 779 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 780 | not_ready: |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 781 | return 0; |
| 782 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 783 | missing: |
| 784 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 785 | * we have not read anything. Otherwise we need to fail because we won't |
| 786 | * be able to poll anymore. |
| 787 | */ |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 788 | conn->err_code = CO_ER_PRX_TRUNCATED; |
| 789 | goto fail; |
| 790 | |
| 791 | bad_header: |
| 792 | /* This is not a valid proxy protocol header */ |
| 793 | conn->err_code = CO_ER_PRX_BAD_HDR; |
| 794 | goto fail; |
| 795 | |
| 796 | recv_abort: |
| 797 | conn->err_code = CO_ER_PRX_ABORT; |
Willy Tarreau | 26f4a04 | 2013-12-04 23:44:10 +0100 | [diff] [blame] | 798 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
Willy Tarreau | 8e3bf69 | 2012-12-03 15:41:18 +0100 | [diff] [blame] | 799 | goto fail; |
| 800 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 801 | fail: |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 802 | conn->flags |= CO_FL_ERROR; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 803 | return 0; |
| 804 | } |
| 805 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 806 | /* This handshake handler waits a NetScaler Client IP insertion header |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 807 | * at the beginning of the raw data stream. The header format is |
| 808 | * described in doc/netscaler-client-ip-insertion-protocol.txt |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 809 | * |
| 810 | * This line MUST be at the beginning of the buffer and MUST NOT be |
| 811 | * fragmented. |
| 812 | * |
| 813 | * The header line is small and in all cases smaller than the smallest normal |
| 814 | * TCP MSS. So it MUST always be delivered as one segment, which ensures we |
| 815 | * can safely use MSG_PEEK and avoid buffering. |
| 816 | * |
| 817 | * Once the data is fetched, the values are set in the connection's address |
| 818 | * fields, and data are removed from the socket's buffer. The function returns |
| 819 | * zero if it needs to wait for more data or if it fails, or 1 if it completed |
| 820 | * and removed itself. |
| 821 | */ |
| 822 | int conn_recv_netscaler_cip(struct connection *conn, int flag) |
| 823 | { |
| 824 | char *line; |
Bertrand Jacquin | 7d668f9 | 2017-12-13 01:23:39 +0000 | [diff] [blame] | 825 | uint32_t hdr_len; |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 826 | uint8_t ip_ver; |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 827 | int ret; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 828 | |
| 829 | /* we might have been called just after an asynchronous shutr */ |
| 830 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 831 | goto fail; |
| 832 | |
| 833 | if (!conn_ctrl_ready(conn)) |
| 834 | goto fail; |
| 835 | |
Olivier Houchard | 1a9dbe5 | 2020-01-22 15:31:09 +0100 | [diff] [blame] | 836 | if (!sockaddr_alloc(&conn->src) || !sockaddr_alloc(&conn->dst)) |
| 837 | goto fail; |
| 838 | |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 839 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 840 | goto not_ready; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 841 | |
| 842 | do { |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 843 | ret = recv(conn->handle.fd, trash.area, trash.size, MSG_PEEK); |
| 844 | if (ret < 0) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 845 | if (errno == EINTR) |
| 846 | continue; |
| 847 | if (errno == EAGAIN) { |
Willy Tarreau | 585744b | 2017-08-24 14:31:19 +0200 | [diff] [blame] | 848 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 849 | goto not_ready; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 850 | } |
| 851 | goto recv_abort; |
| 852 | } |
Willy Tarreau | b406b87 | 2018-08-22 05:20:32 +0200 | [diff] [blame] | 853 | trash.data = ret; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 854 | } while (0); |
| 855 | |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 856 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 857 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 858 | if (!trash.data) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 859 | /* client shutdown */ |
| 860 | conn->err_code = CO_ER_CIP_EMPTY; |
| 861 | goto fail; |
| 862 | } |
| 863 | |
| 864 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 865 | * CIP magic, header length or |
| 866 | * CIP magic, CIP length, CIP type, header length */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 867 | if (trash.data < 12) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 868 | goto missing; |
| 869 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 870 | line = trash.area; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 871 | |
| 872 | /* Decode a possible NetScaler Client IP request, fail early if |
| 873 | * it does not match */ |
Willy Tarreau | 55e0da6 | 2018-09-20 11:26:52 +0200 | [diff] [blame] | 874 | 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] | 875 | goto bad_magic; |
| 876 | |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 877 | /* Legacy CIP protocol */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 878 | if ((trash.area[8] & 0xD0) == 0x40) { |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 879 | hdr_len = ntohl(*(uint32_t *)(line+4)); |
| 880 | line += 8; |
| 881 | } |
| 882 | /* Standard CIP protocol */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 883 | else if (trash.area[8] == 0x00) { |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 884 | hdr_len = ntohs(*(uint32_t *)(line+10)); |
| 885 | line += 12; |
| 886 | } |
| 887 | /* Unknown CIP protocol */ |
| 888 | else { |
| 889 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 890 | goto fail; |
| 891 | } |
| 892 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 893 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 72fa1ec | 2017-12-12 01:17:23 +0000 | [diff] [blame] | 894 | * a minimal IP header */ |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 895 | if (trash.data < 20) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 896 | goto missing; |
| 897 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 898 | /* Get IP version from the first four bits */ |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 899 | ip_ver = (*line & 0xf0) >> 4; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 900 | |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 901 | if (ip_ver == 4) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 902 | struct ip *hdr_ip4; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 903 | struct my_tcphdr *hdr_tcp; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 904 | |
| 905 | hdr_ip4 = (struct ip *)line; |
| 906 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 907 | if (trash.data < 40 || trash.data < hdr_len) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 908 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 67de5a2 | 2017-12-13 01:15:05 +0000 | [diff] [blame] | 909 | * IPv4 header, TCP header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 910 | goto missing; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 911 | } |
| 912 | else if (hdr_ip4->ip_p != IPPROTO_TCP) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 913 | /* The protocol does not include a TCP header */ |
| 914 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 915 | goto fail; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 916 | } |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 917 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 918 | hdr_tcp = (struct my_tcphdr *)(line + (hdr_ip4->ip_hl * 4)); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 919 | |
| 920 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 921 | ((struct sockaddr_in *)conn->src)->sin_family = AF_INET; |
| 922 | ((struct sockaddr_in *)conn->src)->sin_addr.s_addr = hdr_ip4->ip_src.s_addr; |
| 923 | ((struct sockaddr_in *)conn->src)->sin_port = hdr_tcp->source; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 924 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 925 | ((struct sockaddr_in *)conn->dst)->sin_family = AF_INET; |
| 926 | ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr = hdr_ip4->ip_dst.s_addr; |
| 927 | ((struct sockaddr_in *)conn->dst)->sin_port = hdr_tcp->dest; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 928 | |
| 929 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 930 | } |
Willy Tarreau | 0ca24aa | 2019-03-29 17:35:32 +0100 | [diff] [blame] | 931 | else if (ip_ver == 6) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 932 | struct ip6_hdr *hdr_ip6; |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 933 | struct my_tcphdr *hdr_tcp; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 934 | |
| 935 | hdr_ip6 = (struct ip6_hdr *)line; |
| 936 | |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 937 | if (trash.data < 60 || trash.data < hdr_len) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 938 | /* Fail if buffer length is not large enough to contain |
Bertrand Jacquin | 67de5a2 | 2017-12-13 01:15:05 +0000 | [diff] [blame] | 939 | * IPv6 header, TCP header */ |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 940 | goto missing; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 941 | } |
| 942 | else if (hdr_ip6->ip6_nxt != IPPROTO_TCP) { |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 943 | /* The protocol does not include a TCP header */ |
| 944 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 945 | goto fail; |
Bertrand Jacquin | b387591 | 2017-12-13 00:58:51 +0000 | [diff] [blame] | 946 | } |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 947 | |
David Carlier | 3015a2e | 2016-07-04 22:51:33 +0100 | [diff] [blame] | 948 | hdr_tcp = (struct my_tcphdr *)(line + sizeof(struct ip6_hdr)); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 949 | |
| 950 | /* update the session's addresses and mark them set */ |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 951 | ((struct sockaddr_in6 *)conn->src)->sin6_family = AF_INET6; |
| 952 | ((struct sockaddr_in6 *)conn->src)->sin6_addr = hdr_ip6->ip6_src; |
| 953 | ((struct sockaddr_in6 *)conn->src)->sin6_port = hdr_tcp->source; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 954 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 955 | ((struct sockaddr_in6 *)conn->dst)->sin6_family = AF_INET6; |
| 956 | ((struct sockaddr_in6 *)conn->dst)->sin6_addr = hdr_ip6->ip6_dst; |
| 957 | ((struct sockaddr_in6 *)conn->dst)->sin6_port = hdr_tcp->dest; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 958 | |
| 959 | conn->flags |= CO_FL_ADDR_FROM_SET | CO_FL_ADDR_TO_SET; |
| 960 | } |
| 961 | else { |
| 962 | /* The protocol does not match something known (IPv4/IPv6) */ |
| 963 | conn->err_code = CO_ER_CIP_BAD_PROTO; |
| 964 | goto fail; |
| 965 | } |
| 966 | |
Bertrand Jacquin | 7d668f9 | 2017-12-13 01:23:39 +0000 | [diff] [blame] | 967 | line += hdr_len; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 968 | trash.data = line - trash.area; |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 969 | |
| 970 | /* remove the NetScaler Client IP header from the request. For this |
| 971 | * we re-read the exact line at once. If we don't get the exact same |
| 972 | * result, we fail. |
| 973 | */ |
| 974 | do { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 975 | int len2 = recv(conn->handle.fd, trash.area, trash.data, 0); |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 976 | if (len2 < 0 && errno == EINTR) |
| 977 | continue; |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 978 | if (len2 != trash.data) |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 979 | goto recv_abort; |
| 980 | } while (0); |
| 981 | |
| 982 | conn->flags &= ~flag; |
| 983 | return 1; |
| 984 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 985 | not_ready: |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 986 | return 0; |
| 987 | |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 988 | missing: |
| 989 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 990 | * we have not read anything. Otherwise we need to fail because we won't |
| 991 | * be able to poll anymore. |
| 992 | */ |
| 993 | conn->err_code = CO_ER_CIP_TRUNCATED; |
| 994 | goto fail; |
| 995 | |
| 996 | bad_magic: |
| 997 | conn->err_code = CO_ER_CIP_BAD_MAGIC; |
| 998 | goto fail; |
| 999 | |
| 1000 | recv_abort: |
| 1001 | conn->err_code = CO_ER_CIP_ABORT; |
| 1002 | conn->flags |= CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH; |
| 1003 | goto fail; |
| 1004 | |
| 1005 | fail: |
Bertrand Jacquin | 93b227d | 2016-06-04 15:11:10 +0100 | [diff] [blame] | 1006 | conn->flags |= CO_FL_ERROR; |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1010 | |
| 1011 | int conn_send_socks4_proxy_request(struct connection *conn) |
| 1012 | { |
| 1013 | struct socks4_request req_line; |
| 1014 | |
| 1015 | /* we might have been called just after an asynchronous shutw */ |
| 1016 | if (conn->flags & CO_FL_SOCK_WR_SH) |
| 1017 | goto out_error; |
| 1018 | |
| 1019 | if (!conn_ctrl_ready(conn)) |
| 1020 | goto out_error; |
| 1021 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1022 | if (!conn_get_dst(conn)) |
| 1023 | goto out_error; |
| 1024 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1025 | req_line.version = 0x04; |
| 1026 | req_line.command = 0x01; |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1027 | req_line.port = get_net_port(conn->dst); |
| 1028 | req_line.ip = is_inet_addr(conn->dst); |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1029 | memcpy(req_line.user_id, "HAProxy\0", 8); |
| 1030 | |
| 1031 | if (conn->send_proxy_ofs > 0) { |
| 1032 | /* |
| 1033 | * This is the first call to send the request |
| 1034 | */ |
| 1035 | conn->send_proxy_ofs = -(int)sizeof(req_line); |
| 1036 | } |
| 1037 | |
| 1038 | if (conn->send_proxy_ofs < 0) { |
| 1039 | int ret = 0; |
| 1040 | |
| 1041 | /* we are sending the socks4_req_line here. If the data layer |
| 1042 | * has a pending write, we'll also set MSG_MORE. |
| 1043 | */ |
| 1044 | ret = conn_sock_send( |
| 1045 | conn, |
| 1046 | ((char *)(&req_line)) + (sizeof(req_line)+conn->send_proxy_ofs), |
| 1047 | -conn->send_proxy_ofs, |
| 1048 | (conn->flags & CO_FL_XPRT_WR_ENA) ? MSG_MORE : 0); |
| 1049 | |
| 1050 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Before send remain is [%d], sent [%d]\n", |
| 1051 | conn->handle.fd, -conn->send_proxy_ofs, ret); |
| 1052 | |
| 1053 | if (ret < 0) { |
| 1054 | goto out_error; |
| 1055 | } |
| 1056 | |
| 1057 | conn->send_proxy_ofs += ret; /* becomes zero once complete */ |
| 1058 | if (conn->send_proxy_ofs != 0) { |
| 1059 | goto out_wait; |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | /* OK we've the whole request sent */ |
| 1064 | conn->flags &= ~CO_FL_SOCKS4_SEND; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1065 | |
| 1066 | /* The connection is ready now, simply return and let the connection |
| 1067 | * handler notify upper layers if needed. |
| 1068 | */ |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 1069 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1070 | |
| 1071 | if (conn->flags & CO_FL_SEND_PROXY) { |
| 1072 | /* |
| 1073 | * Get the send_proxy_ofs ready for the send_proxy due to we are |
| 1074 | * reusing the "send_proxy_ofs", and SOCKS4 handshake should be done |
| 1075 | * before sending PROXY Protocol. |
| 1076 | */ |
| 1077 | conn->send_proxy_ofs = 1; |
| 1078 | } |
| 1079 | return 1; |
| 1080 | |
| 1081 | out_error: |
| 1082 | /* Write error on the file descriptor */ |
| 1083 | conn->flags |= CO_FL_ERROR; |
| 1084 | if (conn->err_code == CO_ER_NONE) { |
| 1085 | conn->err_code = CO_ER_SOCKS4_SEND; |
| 1086 | } |
| 1087 | return 0; |
| 1088 | |
| 1089 | out_wait: |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1090 | return 0; |
| 1091 | } |
| 1092 | |
| 1093 | int conn_recv_socks4_proxy_response(struct connection *conn) |
| 1094 | { |
| 1095 | char line[SOCKS4_HS_RSP_LEN]; |
| 1096 | int ret; |
| 1097 | |
| 1098 | /* we might have been called just after an asynchronous shutr */ |
| 1099 | if (conn->flags & CO_FL_SOCK_RD_SH) |
| 1100 | goto fail; |
| 1101 | |
| 1102 | if (!conn_ctrl_ready(conn)) |
| 1103 | goto fail; |
| 1104 | |
| 1105 | if (!fd_recv_ready(conn->handle.fd)) |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1106 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1107 | |
| 1108 | do { |
| 1109 | /* SOCKS4 Proxy will response with 8 bytes, 0x00 | 0x5A | 0x00 0x00 | 0x00 0x00 0x00 0x00 |
| 1110 | * Try to peek into it, before all 8 bytes ready. |
| 1111 | */ |
| 1112 | ret = recv(conn->handle.fd, line, SOCKS4_HS_RSP_LEN, MSG_PEEK); |
| 1113 | |
| 1114 | if (ret == 0) { |
| 1115 | /* the socket has been closed or shutdown for send */ |
| 1116 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], errno[%d], looks like the socket has been closed or shutdown for send\n", |
| 1117 | conn->handle.fd, ret, errno); |
| 1118 | if (conn->err_code == CO_ER_NONE) { |
| 1119 | conn->err_code = CO_ER_SOCKS4_RECV; |
| 1120 | } |
| 1121 | goto fail; |
| 1122 | } |
| 1123 | |
| 1124 | if (ret > 0) { |
| 1125 | if (ret == SOCKS4_HS_RSP_LEN) { |
| 1126 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received 8 bytes, the response is [%02X|%02X|%02X %02X|%02X %02X %02X %02X]\n", |
| 1127 | conn->handle.fd, line[0], line[1], line[2], line[3], line[4], line[5], line[6], line[7]); |
| 1128 | }else{ |
| 1129 | 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]); |
| 1130 | } |
| 1131 | } else { |
| 1132 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: Received ret[%d], errno[%d]\n", conn->handle.fd, ret, errno); |
| 1133 | } |
| 1134 | |
| 1135 | if (ret < 0) { |
| 1136 | if (errno == EINTR) { |
| 1137 | continue; |
| 1138 | } |
| 1139 | if (errno == EAGAIN) { |
| 1140 | fd_cant_recv(conn->handle.fd); |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1141 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1142 | } |
| 1143 | goto recv_abort; |
| 1144 | } |
| 1145 | } while (0); |
| 1146 | |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 1147 | conn->flags &= ~CO_FL_WAIT_L4_CONN; |
| 1148 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1149 | if (ret < SOCKS4_HS_RSP_LEN) { |
| 1150 | /* Missing data. Since we're using MSG_PEEK, we can only poll again if |
| 1151 | * we are not able to read enough data. |
| 1152 | */ |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1153 | goto not_ready; |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1154 | } |
| 1155 | |
| 1156 | /* |
| 1157 | * Base on the SOCSK4 protocol: |
| 1158 | * |
| 1159 | * +----+----+----+----+----+----+----+----+ |
| 1160 | * | VN | CD | DSTPORT | DSTIP | |
| 1161 | * +----+----+----+----+----+----+----+----+ |
| 1162 | * # of bytes: 1 1 2 4 |
| 1163 | * VN is the version of the reply code and should be 0. CD is the result |
| 1164 | * code with one of the following values: |
| 1165 | * 90: request granted |
| 1166 | * 91: request rejected or failed |
| 1167 | * 92: request rejected becasue SOCKS server cannot connect to identd on the client |
| 1168 | * 93: request rejected because the client program and identd report different user-ids |
| 1169 | * The remaining fields are ignored. |
| 1170 | */ |
| 1171 | if (line[1] != 90) { |
| 1172 | conn->flags &= ~CO_FL_SOCKS4_RECV; |
| 1173 | |
| 1174 | DPRINTF(stderr, "SOCKS PROXY HS FD[%04X]: FAIL, the response is [%02X|%02X|%02X %02X|%02X %02X %02X %02X]\n", |
| 1175 | conn->handle.fd, line[0], line[1], line[2], line[3], line[4], line[5], line[6], line[7]); |
| 1176 | if (conn->err_code == CO_ER_NONE) { |
| 1177 | conn->err_code = CO_ER_SOCKS4_DENY; |
| 1178 | } |
| 1179 | goto fail; |
| 1180 | } |
| 1181 | |
| 1182 | /* remove the 8 bytes response from the stream */ |
| 1183 | do { |
| 1184 | ret = recv(conn->handle.fd, line, SOCKS4_HS_RSP_LEN, 0); |
| 1185 | if (ret < 0 && errno == EINTR) { |
| 1186 | continue; |
| 1187 | } |
| 1188 | if (ret != SOCKS4_HS_RSP_LEN) { |
| 1189 | if (conn->err_code == CO_ER_NONE) { |
| 1190 | conn->err_code = CO_ER_SOCKS4_RECV; |
| 1191 | } |
| 1192 | goto fail; |
| 1193 | } |
| 1194 | } while (0); |
| 1195 | |
| 1196 | conn->flags &= ~CO_FL_SOCKS4_RECV; |
| 1197 | return 1; |
| 1198 | |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1199 | not_ready: |
Willy Tarreau | 6499b9d | 2019-06-03 08:17:30 +0200 | [diff] [blame] | 1200 | return 0; |
| 1201 | |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1202 | recv_abort: |
| 1203 | if (conn->err_code == CO_ER_NONE) { |
| 1204 | conn->err_code = CO_ER_SOCKS4_ABORT; |
| 1205 | } |
| 1206 | conn->flags |= (CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH); |
| 1207 | goto fail; |
| 1208 | |
| 1209 | fail: |
Alexander Liu | 2a54bb7 | 2019-05-22 19:44:48 +0800 | [diff] [blame] | 1210 | conn->flags |= CO_FL_ERROR; |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1214 | /* Note: <remote> is explicitly allowed to be NULL */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1215 | int make_proxy_line(char *buf, int buf_len, struct server *srv, struct connection *remote) |
| 1216 | { |
| 1217 | int ret = 0; |
| 1218 | |
| 1219 | if (srv && (srv->pp_opts & SRV_PP_V2)) { |
| 1220 | ret = make_proxy_line_v2(buf, buf_len, srv, remote); |
| 1221 | } |
| 1222 | else { |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1223 | if (remote && conn_get_src(remote) && conn_get_dst(remote)) |
| 1224 | ret = make_proxy_line_v1(buf, buf_len, remote->src, remote->dst); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1225 | else |
| 1226 | ret = make_proxy_line_v1(buf, buf_len, NULL, NULL); |
| 1227 | } |
| 1228 | |
| 1229 | return ret; |
| 1230 | } |
| 1231 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1232 | /* Makes a PROXY protocol line from the two addresses. The output is sent to |
| 1233 | * buffer <buf> for a maximum size of <buf_len> (including the trailing zero). |
| 1234 | * It returns the number of bytes composing this line (including the trailing |
| 1235 | * 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] | 1236 | * TCP6 and "UNKNOWN" formats. If any of <src> or <dst> is null, UNKNOWN is |
| 1237 | * emitted as well. |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1238 | */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1239 | 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] | 1240 | { |
| 1241 | int ret = 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1242 | char * protocol; |
| 1243 | char src_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)]; |
| 1244 | char dst_str[MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)]; |
| 1245 | in_port_t src_port; |
| 1246 | in_port_t dst_port; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1247 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1248 | if ( !src |
| 1249 | || !dst |
| 1250 | || (src->ss_family != AF_INET && src->ss_family != AF_INET6) |
| 1251 | || (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) { |
| 1252 | /* unknown family combination */ |
| 1253 | ret = snprintf(buf, buf_len, "PROXY UNKNOWN\r\n"); |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1254 | if (ret >= buf_len) |
| 1255 | return 0; |
| 1256 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1257 | return ret; |
| 1258 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1259 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1260 | /* IPv4 for both src and dst */ |
| 1261 | if (src->ss_family == AF_INET && dst->ss_family == AF_INET) { |
| 1262 | protocol = "TCP4"; |
| 1263 | 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] | 1264 | return 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1265 | src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1266 | 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] | 1267 | return 0; |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1268 | dst_port = ((struct sockaddr_in *)dst)->sin_port; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1269 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1270 | /* IPv6 for at least one of src and dst */ |
| 1271 | else { |
| 1272 | struct in6_addr tmp; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1273 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1274 | protocol = "TCP6"; |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1275 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1276 | if (src->ss_family == AF_INET) { |
| 1277 | /* Convert src to IPv6 */ |
| 1278 | v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr); |
| 1279 | src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1280 | } |
| 1281 | else { |
| 1282 | tmp = ((struct sockaddr_in6 *)src)->sin6_addr; |
| 1283 | src_port = ((struct sockaddr_in6 *)src)->sin6_port; |
| 1284 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1285 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1286 | if (!inet_ntop(AF_INET6, &tmp, src_str, sizeof(src_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1287 | return 0; |
| 1288 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1289 | if (dst->ss_family == AF_INET) { |
| 1290 | /* Convert dst to IPv6 */ |
| 1291 | v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr); |
| 1292 | dst_port = ((struct sockaddr_in *)dst)->sin_port; |
| 1293 | } |
| 1294 | else { |
| 1295 | tmp = ((struct sockaddr_in6 *)dst)->sin6_addr; |
| 1296 | dst_port = ((struct sockaddr_in6 *)dst)->sin6_port; |
| 1297 | } |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1298 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1299 | if (!inet_ntop(AF_INET6, &tmp, dst_str, sizeof(dst_str))) |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1300 | return 0; |
| 1301 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1302 | |
| 1303 | ret = snprintf(buf, buf_len, "PROXY %s %s %s %u %u\r\n", protocol, src_str, dst_str, ntohs(src_port), ntohs(dst_port)); |
| 1304 | if (ret >= buf_len) |
| 1305 | return 0; |
| 1306 | |
Willy Tarreau | e1e4a61 | 2012-10-05 00:10:55 +0200 | [diff] [blame] | 1307 | return ret; |
| 1308 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1309 | |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1310 | 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] | 1311 | { |
| 1312 | struct tlv *tlv; |
| 1313 | |
| 1314 | if (!dest || (length + sizeof(*tlv) > dest_len)) |
| 1315 | return 0; |
| 1316 | |
| 1317 | tlv = (struct tlv *)dest; |
| 1318 | |
| 1319 | tlv->type = type; |
| 1320 | tlv->length_hi = length >> 8; |
| 1321 | tlv->length_lo = length & 0x00ff; |
| 1322 | memcpy(tlv->value, value, length); |
| 1323 | return length + sizeof(*tlv); |
| 1324 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1325 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1326 | /* Note: <remote> is explicitly allowed to be NULL */ |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1327 | int make_proxy_line_v2(char *buf, int buf_len, struct server *srv, struct connection *remote) |
| 1328 | { |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1329 | const char pp2_signature[] = PP2_SIGNATURE; |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1330 | void *tlv_crc32c_p = NULL; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1331 | int ret = 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1332 | struct proxy_hdr_v2 *hdr = (struct proxy_hdr_v2 *)buf; |
Vincent Bernat | 6e61589 | 2016-05-18 16:17:44 +0200 | [diff] [blame] | 1333 | struct sockaddr_storage null_addr = { .ss_family = 0 }; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1334 | struct sockaddr_storage *src = &null_addr; |
| 1335 | struct sockaddr_storage *dst = &null_addr; |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1336 | const char *value; |
| 1337 | int value_len; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1338 | |
| 1339 | if (buf_len < PP2_HEADER_LEN) |
| 1340 | return 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1341 | memcpy(hdr->sig, pp2_signature, PP2_SIGNATURE_LEN); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1342 | |
Willy Tarreau | 226572f | 2019-07-17 14:46:00 +0200 | [diff] [blame] | 1343 | if (remote && conn_get_src(remote) && conn_get_dst(remote)) { |
| 1344 | src = remote->src; |
| 1345 | dst = remote->dst; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1346 | } |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1347 | |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1348 | /* At least one of src or dst is not of AF_INET or AF_INET6 */ |
| 1349 | if ( !src |
| 1350 | || !dst |
| 1351 | || (src->ss_family != AF_INET && src->ss_family != AF_INET6) |
| 1352 | || (dst->ss_family != AF_INET && dst->ss_family != AF_INET6)) { |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1353 | if (buf_len < PP2_HDR_LEN_UNSPEC) |
| 1354 | return 0; |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1355 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_LOCAL; |
| 1356 | hdr->fam = PP2_FAM_UNSPEC | PP2_TRANS_UNSPEC; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1357 | ret = PP2_HDR_LEN_UNSPEC; |
| 1358 | } |
Tim Duesterhus | 7fec021 | 2018-07-27 18:46:13 +0200 | [diff] [blame] | 1359 | else { |
| 1360 | /* IPv4 for both src and dst */ |
| 1361 | if (src->ss_family == AF_INET && dst->ss_family == AF_INET) { |
| 1362 | if (buf_len < PP2_HDR_LEN_INET) |
| 1363 | return 0; |
| 1364 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY; |
| 1365 | hdr->fam = PP2_FAM_INET | PP2_TRANS_STREAM; |
| 1366 | hdr->addr.ip4.src_addr = ((struct sockaddr_in *)src)->sin_addr.s_addr; |
| 1367 | hdr->addr.ip4.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1368 | hdr->addr.ip4.dst_addr = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
| 1369 | hdr->addr.ip4.dst_port = ((struct sockaddr_in *)dst)->sin_port; |
| 1370 | ret = PP2_HDR_LEN_INET; |
| 1371 | } |
| 1372 | /* IPv6 for at least one of src and dst */ |
| 1373 | else { |
| 1374 | struct in6_addr tmp; |
| 1375 | |
| 1376 | if (buf_len < PP2_HDR_LEN_INET6) |
| 1377 | return 0; |
| 1378 | hdr->ver_cmd = PP2_VERSION | PP2_CMD_PROXY; |
| 1379 | hdr->fam = PP2_FAM_INET6 | PP2_TRANS_STREAM; |
| 1380 | if (src->ss_family == AF_INET) { |
| 1381 | v4tov6(&tmp, &((struct sockaddr_in *)src)->sin_addr); |
| 1382 | memcpy(hdr->addr.ip6.src_addr, &tmp, 16); |
| 1383 | hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1384 | } |
| 1385 | else { |
| 1386 | memcpy(hdr->addr.ip6.src_addr, &((struct sockaddr_in6 *)src)->sin6_addr, 16); |
| 1387 | hdr->addr.ip6.src_port = ((struct sockaddr_in6 *)src)->sin6_port; |
| 1388 | } |
| 1389 | if (dst->ss_family == AF_INET) { |
| 1390 | v4tov6(&tmp, &((struct sockaddr_in *)dst)->sin_addr); |
| 1391 | memcpy(hdr->addr.ip6.dst_addr, &tmp, 16); |
| 1392 | hdr->addr.ip6.src_port = ((struct sockaddr_in *)src)->sin_port; |
| 1393 | } |
| 1394 | else { |
| 1395 | memcpy(hdr->addr.ip6.dst_addr, &((struct sockaddr_in6 *)dst)->sin6_addr, 16); |
| 1396 | hdr->addr.ip6.dst_port = ((struct sockaddr_in6 *)dst)->sin6_port; |
| 1397 | } |
| 1398 | |
| 1399 | ret = PP2_HDR_LEN_INET6; |
| 1400 | } |
| 1401 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1402 | |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1403 | if (srv->pp_opts & SRV_PP_V2_CRC32C) { |
| 1404 | uint32_t zero_crc32c = 0; |
| 1405 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1406 | return 0; |
| 1407 | tlv_crc32c_p = (void *)((struct tlv *)&buf[ret])->value; |
| 1408 | ret += make_tlv(&buf[ret], (buf_len - ret), PP2_TYPE_CRC32C, sizeof(zero_crc32c), (const char *)&zero_crc32c); |
| 1409 | } |
| 1410 | |
Ilya Shipitsin | ca56fce | 2018-09-15 00:50:05 +0500 | [diff] [blame] | 1411 | if (remote && conn_get_alpn(remote, &value, &value_len)) { |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1412 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1413 | return 0; |
Emmanuel Hocdet | 571c7ac | 2017-10-31 18:24:05 +0100 | [diff] [blame] | 1414 | 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] | 1415 | } |
| 1416 | |
Emmanuel Hocdet | 253c3b7 | 2018-02-01 18:29:59 +0100 | [diff] [blame] | 1417 | if (srv->pp_opts & SRV_PP_V2_AUTHORITY) { |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1418 | value = NULL; |
| 1419 | if (remote && remote->proxy_authority) { |
| 1420 | value = remote->proxy_authority; |
| 1421 | value_len = remote->proxy_authority_len; |
| 1422 | } |
| 1423 | #ifdef USE_OPENSSL |
| 1424 | else { |
Jerome Magnin | 78891c7 | 2019-09-02 09:53:41 +0200 | [diff] [blame] | 1425 | if ((value = ssl_sock_get_sni(remote))) |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1426 | value_len = strlen(value); |
| 1427 | } |
| 1428 | #endif |
Emmanuel Hocdet | 253c3b7 | 2018-02-01 18:29:59 +0100 | [diff] [blame] | 1429 | if (value) { |
| 1430 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1431 | return 0; |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1432 | 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] | 1433 | } |
| 1434 | } |
| 1435 | |
Emmanuel Hocdet | 8a4ffa0 | 2019-08-29 11:54:51 +0200 | [diff] [blame] | 1436 | #ifdef USE_OPENSSL |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1437 | if (srv->pp_opts & SRV_PP_V2_SSL) { |
Emmanuel Hocdet | 404d978 | 2017-10-24 10:55:14 +0200 | [diff] [blame] | 1438 | struct tlv_ssl *tlv; |
| 1439 | int ssl_tlv_len = 0; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1440 | if ((buf_len - ret) < sizeof(struct tlv_ssl)) |
| 1441 | return 0; |
| 1442 | tlv = (struct tlv_ssl *)&buf[ret]; |
| 1443 | memset(tlv, 0, sizeof(struct tlv_ssl)); |
| 1444 | ssl_tlv_len += sizeof(struct tlv_ssl); |
| 1445 | tlv->tlv.type = PP2_TYPE_SSL; |
| 1446 | if (ssl_sock_is_ssl(remote)) { |
| 1447 | tlv->client |= PP2_CLIENT_SSL; |
Emmanuel Hocdet | 01da571 | 2017-10-13 16:59:49 +0200 | [diff] [blame] | 1448 | value = ssl_sock_get_proto_version(remote); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1449 | if (value) { |
Emmanuel Hocdet | 8c0c34b | 2018-02-28 12:02:14 +0100 | [diff] [blame] | 1450 | 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] | 1451 | } |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 1452 | if (ssl_sock_get_cert_used_sess(remote)) { |
| 1453 | tlv->client |= PP2_CLIENT_CERT_SESS; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1454 | tlv->verify = htonl(ssl_sock_get_verify_result(remote)); |
Dave McCowan | 328fb58 | 2014-07-30 10:39:13 -0400 | [diff] [blame] | 1455 | if (ssl_sock_get_cert_used_conn(remote)) |
| 1456 | tlv->client |= PP2_CLIENT_CERT_CONN; |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1457 | } |
| 1458 | if (srv->pp_opts & SRV_PP_V2_SSL_CN) { |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1459 | struct buffer *cn_trash = get_trash_chunk(); |
Willy Tarreau | 3b9a0c9 | 2014-07-19 06:37:33 +0200 | [diff] [blame] | 1460 | if (ssl_sock_get_remote_common_name(remote, cn_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_CN, |
| 1462 | cn_trash->data, |
| 1463 | cn_trash->area); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1464 | } |
| 1465 | } |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1466 | if (srv->pp_opts & SRV_PP_V2_SSL_KEY_ALG) { |
Willy Tarreau | 83061a8 | 2018-07-13 11:56:34 +0200 | [diff] [blame] | 1467 | struct buffer *pkey_trash = get_trash_chunk(); |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1468 | if (ssl_sock_get_pkey_algo(remote, pkey_trash) > 0) { |
Willy Tarreau | 843b7cb | 2018-07-13 10:54:26 +0200 | [diff] [blame] | 1469 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_KEY_ALG, |
| 1470 | pkey_trash->data, |
| 1471 | pkey_trash->area); |
Emmanuel Hocdet | fa8d0f1 | 2018-02-01 15:53:52 +0100 | [diff] [blame] | 1472 | } |
| 1473 | } |
| 1474 | if (srv->pp_opts & SRV_PP_V2_SSL_SIG_ALG) { |
| 1475 | value = ssl_sock_get_cert_sig(remote); |
| 1476 | if (value) { |
| 1477 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_SIG_ALG, strlen(value), value); |
| 1478 | } |
| 1479 | } |
| 1480 | if (srv->pp_opts & SRV_PP_V2_SSL_CIPHER) { |
| 1481 | value = ssl_sock_get_cipher_name(remote); |
| 1482 | if (value) { |
| 1483 | ssl_tlv_len += make_tlv(&buf[ret+ssl_tlv_len], (buf_len - ret - ssl_tlv_len), PP2_SUBTYPE_SSL_CIPHER, strlen(value), value); |
| 1484 | } |
| 1485 | } |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1486 | } |
| 1487 | tlv->tlv.length_hi = (uint16_t)(ssl_tlv_len - sizeof(struct tlv)) >> 8; |
| 1488 | tlv->tlv.length_lo = (uint16_t)(ssl_tlv_len - sizeof(struct tlv)) & 0x00ff; |
| 1489 | ret += ssl_tlv_len; |
| 1490 | } |
| 1491 | #endif |
| 1492 | |
Willy Tarreau | e573323 | 2019-05-22 19:24:06 +0200 | [diff] [blame] | 1493 | #ifdef USE_NS |
KOVACS Krisztian | b3e54fe | 2014-11-17 15:11:45 +0100 | [diff] [blame] | 1494 | if (remote && (remote->proxy_netns)) { |
| 1495 | if ((buf_len - ret) < sizeof(struct tlv)) |
| 1496 | return 0; |
Emmanuel Hocdet | 571c7ac | 2017-10-31 18:24:05 +0100 | [diff] [blame] | 1497 | 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] | 1498 | } |
| 1499 | #endif |
| 1500 | |
Willy Tarreau | 8fccfa2 | 2014-06-14 08:28:06 +0200 | [diff] [blame] | 1501 | hdr->len = htons((uint16_t)(ret - PP2_HEADER_LEN)); |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1502 | |
Emmanuel Hocdet | 4399c75 | 2018-02-05 15:26:43 +0100 | [diff] [blame] | 1503 | if (tlv_crc32c_p) { |
| 1504 | write_u32(tlv_crc32c_p, htonl(hash_crc32c(buf, ret))); |
| 1505 | } |
| 1506 | |
David S | afb7683 | 2014-05-08 23:42:08 -0400 | [diff] [blame] | 1507 | return ret; |
| 1508 | } |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1509 | |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1510 | /* return the major HTTP version as 1 or 2 depending on how the request arrived |
| 1511 | * before being processed. |
| 1512 | */ |
| 1513 | static int |
| 1514 | smp_fetch_fc_http_major(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1515 | { |
Jérôme Magnin | 8657742 | 2018-12-07 09:03:11 +0100 | [diff] [blame] | 1516 | struct connection *conn = (kw[0] != 'b') ? objt_conn(smp->sess->origin) : |
| 1517 | smp->strm ? cs_conn(objt_cs(smp->strm->si[1].end)) : NULL; |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1518 | |
| 1519 | smp->data.type = SMP_T_SINT; |
| 1520 | smp->data.u.sint = (conn && strcmp(conn_get_mux_name(conn), "H2") == 0) ? 2 : 1; |
| 1521 | return 1; |
| 1522 | } |
| 1523 | |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1524 | /* fetch if the received connection used a PROXY protocol header */ |
| 1525 | int smp_fetch_fc_rcvd_proxy(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1526 | { |
| 1527 | struct connection *conn; |
| 1528 | |
| 1529 | conn = objt_conn(smp->sess->origin); |
| 1530 | if (!conn) |
| 1531 | return 0; |
| 1532 | |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 1533 | if (conn->flags & CO_FL_WAIT_L4L6) { |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1534 | smp->flags |= SMP_F_MAY_CHANGE; |
| 1535 | return 0; |
| 1536 | } |
| 1537 | |
| 1538 | smp->flags = 0; |
| 1539 | smp->data.type = SMP_T_BOOL; |
| 1540 | smp->data.u.sint = (conn->flags & CO_FL_RCVD_PROXY) ? 1 : 0; |
| 1541 | |
| 1542 | return 1; |
| 1543 | } |
| 1544 | |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 1545 | /* fetch the authority TLV from a PROXY protocol header */ |
| 1546 | int smp_fetch_fc_pp_authority(const struct arg *args, struct sample *smp, const char *kw, void *private) |
| 1547 | { |
| 1548 | struct connection *conn; |
| 1549 | |
| 1550 | conn = objt_conn(smp->sess->origin); |
| 1551 | if (!conn) |
| 1552 | return 0; |
| 1553 | |
Willy Tarreau | c192b0a | 2020-01-23 09:11:58 +0100 | [diff] [blame] | 1554 | if (conn->flags & CO_FL_WAIT_L4L6) { |
Geoff Simmons | 7185b78 | 2019-08-27 18:31:16 +0200 | [diff] [blame] | 1555 | smp->flags |= SMP_F_MAY_CHANGE; |
| 1556 | return 0; |
| 1557 | } |
| 1558 | |
| 1559 | if (conn->proxy_authority == NULL) |
| 1560 | return 0; |
| 1561 | |
| 1562 | smp->flags = 0; |
| 1563 | smp->data.type = SMP_T_STR; |
| 1564 | smp->data.u.str.area = conn->proxy_authority; |
| 1565 | smp->data.u.str.data = conn->proxy_authority_len; |
| 1566 | |
| 1567 | return 1; |
| 1568 | } |
| 1569 | |
Emeric Brun | 4f60301 | 2017-01-05 15:11:44 +0100 | [diff] [blame] | 1570 | /* Note: must not be declared <const> as its list will be overwritten. |
| 1571 | * Note: fetches that may return multiple types must be declared as the lowest |
| 1572 | * common denominator, the type that can be casted into all other ones. For |
| 1573 | * instance v4/v6 must be declared v4. |
| 1574 | */ |
| 1575 | static struct sample_fetch_kw_list sample_fetch_keywords = {ILH, { |
Willy Tarreau | 60ca10a | 2017-08-18 15:26:54 +0200 | [diff] [blame] | 1576 | { "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] | 1577 | { "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] | 1578 | { "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] | 1579 | { "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] | 1580 | { /* END */ }, |
| 1581 | }}; |
| 1582 | |
Willy Tarreau | 0108d90 | 2018-11-25 19:14:37 +0100 | [diff] [blame] | 1583 | INITCALL1(STG_REGISTER, sample_register_fetches, &sample_fetch_keywords); |