markus@openbsd.org | 6cf7117 | 2017-05-26 19:35:50 +0000 | [diff] [blame] | 1 | /* $OpenBSD: channels.h,v 1.125 2017/05/26 19:35:50 markus Exp $ */ |
Ben Lindstrom | 05764b9 | 2002-03-05 01:53:02 +0000 | [diff] [blame] | 2 | |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 3 | /* |
| 4 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 5 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 6 | * All rights reserved |
| 7 | * |
| 8 | * As far as I am concerned, the code I have written for this software |
| 9 | * can be used freely for any purpose. Any derived versions of this |
| 10 | * software must be clearly marked as such, and if the derived work is |
| 11 | * incompatible with the protocol description in the RFC file, it must be |
| 12 | * called by a name other than "ssh" or "Secure Shell". |
| 13 | */ |
| 14 | /* |
Damien Miller | b51ed39 | 2002-01-22 23:29:03 +1100 | [diff] [blame] | 15 | * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 16 | * |
| 17 | * Redistribution and use in source and binary forms, with or without |
| 18 | * modification, are permitted provided that the following conditions |
| 19 | * are met: |
| 20 | * 1. Redistributions of source code must retain the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer. |
| 22 | * 2. Redistributions in binary form must reproduce the above copyright |
| 23 | * notice, this list of conditions and the following disclaimer in the |
| 24 | * documentation and/or other materials provided with the distribution. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 27 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 28 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 29 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 30 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 31 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 32 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 33 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 35 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 37 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 38 | #ifndef CHANNEL_H |
| 39 | #define CHANNEL_H |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 40 | |
| 41 | /* Definitions for channel types. */ |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 42 | #define SSH_CHANNEL_X11_LISTENER 1 /* Listening for inet X11 conn. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 43 | #define SSH_CHANNEL_PORT_LISTENER 2 /* Listening on a port. */ |
| 44 | #define SSH_CHANNEL_OPENING 3 /* waiting for confirmation */ |
| 45 | #define SSH_CHANNEL_OPEN 4 /* normal open two-way channel */ |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 46 | #define SSH_CHANNEL_CLOSED 5 /* waiting for close confirmation */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 47 | #define SSH_CHANNEL_AUTH_SOCKET 6 /* authentication socket */ |
| 48 | #define SSH_CHANNEL_X11_OPEN 7 /* reading first X11 packet */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 49 | #define SSH_CHANNEL_LARVAL 10 /* larval session */ |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 50 | #define SSH_CHANNEL_RPORT_LISTENER 11 /* Listening to a R-style port */ |
Ben Lindstrom | 7ad9710 | 2000-12-06 01:42:49 +0000 | [diff] [blame] | 51 | #define SSH_CHANNEL_CONNECTING 12 |
Ben Lindstrom | 3bb4f9d | 2001-04-08 18:30:26 +0000 | [diff] [blame] | 52 | #define SSH_CHANNEL_DYNAMIC 13 |
Ben Lindstrom | c0dee1a | 2001-06-05 20:52:50 +0000 | [diff] [blame] | 53 | #define SSH_CHANNEL_ZOMBIE 14 /* Almost dead. */ |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 54 | #define SSH_CHANNEL_MUX_LISTENER 15 /* Listener for mux conn. */ |
| 55 | #define SSH_CHANNEL_MUX_CLIENT 16 /* Conn. to mux slave */ |
Damien Miller | 3618709 | 2013-06-10 13:07:11 +1000 | [diff] [blame] | 56 | #define SSH_CHANNEL_ABANDONED 17 /* Abandoned session, eg mux */ |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 57 | #define SSH_CHANNEL_UNIX_LISTENER 18 /* Listening on a domain socket. */ |
| 58 | #define SSH_CHANNEL_RUNIX_LISTENER 19 /* Listening to a R-style domain socket. */ |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 59 | #define SSH_CHANNEL_MUX_PROXY 20 /* proxy channel for mux-slave */ |
| 60 | #define SSH_CHANNEL_MAX_TYPE 21 |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 61 | |
Damien Miller | ff77364 | 2011-09-22 21:39:48 +1000 | [diff] [blame] | 62 | #define CHANNEL_CANCEL_PORT_STATIC -1 |
| 63 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 64 | struct Channel; |
| 65 | typedef struct Channel Channel; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 66 | |
Damien Miller | d530f5f | 2010-05-21 14:57:10 +1000 | [diff] [blame] | 67 | typedef void channel_open_fn(int, int, void *); |
Ben Lindstrom | 16ae3d0 | 2001-07-04 04:02:36 +0000 | [diff] [blame] | 68 | typedef void channel_callback_fn(int, void *); |
Damien Miller | 077b238 | 2005-12-31 16:22:32 +1100 | [diff] [blame] | 69 | typedef int channel_infilter_fn(struct Channel *, char *, int); |
Darren Tucker | 84c56f5 | 2008-06-13 04:55:46 +1000 | [diff] [blame] | 70 | typedef void channel_filter_cleanup_fn(int, void *); |
Damien Miller | 077b238 | 2005-12-31 16:22:32 +1100 | [diff] [blame] | 71 | typedef u_char *channel_outfilter_fn(struct Channel *, u_char **, u_int *); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 72 | |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 73 | /* Channel success/failure callbacks */ |
| 74 | typedef void channel_confirm_cb(int, struct Channel *, void *); |
| 75 | typedef void channel_confirm_abandon_cb(struct Channel *, void *); |
| 76 | struct channel_confirm { |
| 77 | TAILQ_ENTRY(channel_confirm) entry; |
| 78 | channel_confirm_cb *cb; |
| 79 | channel_confirm_abandon_cb *abandon_cb; |
| 80 | void *ctx; |
| 81 | }; |
| 82 | TAILQ_HEAD(channel_confirms, channel_confirm); |
| 83 | |
Damien Miller | bd74025 | 2008-05-19 15:37:09 +1000 | [diff] [blame] | 84 | /* Context for non-blocking connects */ |
| 85 | struct channel_connect { |
| 86 | char *host; |
| 87 | int port; |
| 88 | struct addrinfo *ai, *aitop; |
| 89 | }; |
| 90 | |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 91 | /* Callbacks for mux channels back into client-specific code */ |
| 92 | typedef int mux_callback_fn(struct Channel *); |
| 93 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 94 | struct Channel { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 95 | int type; /* channel type/state */ |
| 96 | int self; /* my own channel identifier */ |
| 97 | int remote_id; /* channel identifier for remote peer */ |
Damien Miller | abea8ee | 2002-01-22 23:27:11 +1100 | [diff] [blame] | 98 | u_int istate; /* input from channel (state of receive half) */ |
| 99 | u_int ostate; /* output to channel (state of transmit half) */ |
Damien Miller | 33b1356 | 2000-04-04 14:38:59 +1000 | [diff] [blame] | 100 | int flags; /* close sent/rcvd */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 101 | int rfd; /* read fd */ |
| 102 | int wfd; /* write fd */ |
| 103 | int efd; /* extended fd */ |
| 104 | int sock; /* sock fd */ |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 105 | int ctl_chan; /* control channel (multiplexed connections) */ |
Damien Miller | 79438cc | 2001-02-16 12:34:57 +1100 | [diff] [blame] | 106 | int isatty; /* rfd is a tty */ |
Damien Miller | c192a4c | 2013-08-01 14:29:20 +1000 | [diff] [blame] | 107 | #ifdef _AIX |
Ben Lindstrom | beb5f33 | 2002-07-22 15:28:53 +0000 | [diff] [blame] | 108 | int wfd_isatty; /* wfd is a tty */ |
Damien Miller | c192a4c | 2013-08-01 14:29:20 +1000 | [diff] [blame] | 109 | #endif |
Darren Tucker | 5d78de6 | 2004-11-05 20:35:44 +1100 | [diff] [blame] | 110 | int client_tty; /* (client) TTY has been requested */ |
Damien Miller | 4623a75 | 2001-10-10 15:03:58 +1000 | [diff] [blame] | 111 | int force_drain; /* force close on iEOF */ |
Damien Miller | a650875 | 2012-04-22 11:21:10 +1000 | [diff] [blame] | 112 | time_t notbefore; /* Pause IO until deadline (time_t) */ |
Darren Tucker | 876045b | 2010-01-08 17:08:00 +1100 | [diff] [blame] | 113 | int delayed; /* post-select handlers for newly created |
| 114 | * channels are delayed until the first call |
djm@openbsd.org | c28a343 | 2015-05-08 06:45:13 +0000 | [diff] [blame] | 115 | * to a matching pre-select handler. |
Darren Tucker | 876045b | 2010-01-08 17:08:00 +1100 | [diff] [blame] | 116 | * this way post-select handlers are not |
Darren Tucker | 5d12b8f | 2013-06-06 08:09:10 +1000 | [diff] [blame] | 117 | * accidentally called if a FD gets reused */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 118 | Buffer input; /* data read from socket, to be sent over |
| 119 | * encrypted connection */ |
| 120 | Buffer output; /* data received over encrypted connection for |
| 121 | * send on socket */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 122 | Buffer extended; |
Damien Miller | a1c1b6c | 2009-01-28 16:29:49 +1100 | [diff] [blame] | 123 | char *path; |
Ben Lindstrom | 99c73b3 | 2001-05-05 04:09:47 +0000 | [diff] [blame] | 124 | /* path for unix domain sockets, or host name for forwards */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 125 | int listening_port; /* port being listened for forwards */ |
Damien Miller | f6dff7c | 2011-09-22 21:38:52 +1000 | [diff] [blame] | 126 | char *listening_addr; /* addr being listened for forwards */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 127 | int host_port; /* remote port to connect for forwards */ |
| 128 | char *remote_name; /* remote hostname */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 129 | |
Ben Lindstrom | 4fed2be | 2002-06-25 23:17:36 +0000 | [diff] [blame] | 130 | u_int remote_window; |
| 131 | u_int remote_maxpacket; |
| 132 | u_int local_window; |
| 133 | u_int local_window_max; |
| 134 | u_int local_consumed; |
| 135 | u_int local_maxpacket; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 136 | int extended_usage; |
Damien Miller | e737856 | 2001-12-21 14:58:35 +1100 | [diff] [blame] | 137 | int single_connection; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 138 | |
| 139 | char *ctype; /* type */ |
| 140 | |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 141 | /* callback */ |
Damien Miller | d530f5f | 2010-05-21 14:57:10 +1000 | [diff] [blame] | 142 | channel_open_fn *open_confirm; |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 143 | void *open_confirm_ctx; |
Damien Miller | 39eda6e | 2005-11-05 14:52:50 +1100 | [diff] [blame] | 144 | channel_callback_fn *detach_user; |
| 145 | int detach_close; |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 146 | struct channel_confirms status_confirms; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 147 | |
| 148 | /* filter */ |
Damien Miller | 077b238 | 2005-12-31 16:22:32 +1100 | [diff] [blame] | 149 | channel_infilter_fn *input_filter; |
| 150 | channel_outfilter_fn *output_filter; |
Darren Tucker | 2fb66ca | 2008-06-13 04:49:33 +1000 | [diff] [blame] | 151 | void *filter_ctx; |
Darren Tucker | 84c56f5 | 2008-06-13 04:55:46 +1000 | [diff] [blame] | 152 | channel_filter_cleanup_fn *filter_cleanup; |
Damien Miller | d27b947 | 2005-12-13 19:29:02 +1100 | [diff] [blame] | 153 | |
Damien Miller | bd74025 | 2008-05-19 15:37:09 +1000 | [diff] [blame] | 154 | /* keep boundaries */ |
| 155 | int datagram; |
| 156 | |
| 157 | /* non-blocking connect */ |
| 158 | struct channel_connect connect_ctx; |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 159 | |
| 160 | /* multiplexing protocol hook, called for each packet received */ |
| 161 | mux_callback_fn *mux_rcb; |
| 162 | void *mux_ctx; |
Damien Miller | d530f5f | 2010-05-21 14:57:10 +1000 | [diff] [blame] | 163 | int mux_pause; |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 164 | int mux_downstream_id; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 165 | }; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 166 | |
| 167 | #define CHAN_EXTENDED_IGNORE 0 |
| 168 | #define CHAN_EXTENDED_READ 1 |
| 169 | #define CHAN_EXTENDED_WRITE 2 |
| 170 | |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 171 | /* default window/packet sizes for tcp/x11-fwd-channel */ |
Damien Miller | 19a5945 | 2002-02-19 15:20:57 +1100 | [diff] [blame] | 172 | #define CHAN_SES_PACKET_DEFAULT (32*1024) |
Darren Tucker | 395ecc2 | 2007-06-12 23:38:53 +1000 | [diff] [blame] | 173 | #define CHAN_SES_WINDOW_DEFAULT (64*CHAN_SES_PACKET_DEFAULT) |
Damien Miller | 19a5945 | 2002-02-19 15:20:57 +1100 | [diff] [blame] | 174 | #define CHAN_TCP_PACKET_DEFAULT (32*1024) |
Darren Tucker | 395ecc2 | 2007-06-12 23:38:53 +1000 | [diff] [blame] | 175 | #define CHAN_TCP_WINDOW_DEFAULT (64*CHAN_TCP_PACKET_DEFAULT) |
Damien Miller | 19a5945 | 2002-02-19 15:20:57 +1100 | [diff] [blame] | 176 | #define CHAN_X11_PACKET_DEFAULT (16*1024) |
| 177 | #define CHAN_X11_WINDOW_DEFAULT (4*CHAN_X11_PACKET_DEFAULT) |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 178 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 179 | /* possible input states */ |
Damien Miller | abea8ee | 2002-01-22 23:27:11 +1100 | [diff] [blame] | 180 | #define CHAN_INPUT_OPEN 0 |
| 181 | #define CHAN_INPUT_WAIT_DRAIN 1 |
| 182 | #define CHAN_INPUT_WAIT_OCLOSE 2 |
| 183 | #define CHAN_INPUT_CLOSED 3 |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 184 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 185 | /* possible output states */ |
Damien Miller | abea8ee | 2002-01-22 23:27:11 +1100 | [diff] [blame] | 186 | #define CHAN_OUTPUT_OPEN 0 |
| 187 | #define CHAN_OUTPUT_WAIT_DRAIN 1 |
| 188 | #define CHAN_OUTPUT_WAIT_IEOF 2 |
| 189 | #define CHAN_OUTPUT_CLOSED 3 |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 190 | |
| 191 | #define CHAN_CLOSE_SENT 0x01 |
| 192 | #define CHAN_CLOSE_RCVD 0x02 |
Ben Lindstrom | cf15944 | 2002-03-26 03:26:24 +0000 | [diff] [blame] | 193 | #define CHAN_EOF_SENT 0x04 |
| 194 | #define CHAN_EOF_RCVD 0x08 |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 195 | #define CHAN_LOCAL 0x10 |
Ben Lindstrom | cf15944 | 2002-03-26 03:26:24 +0000 | [diff] [blame] | 196 | |
Damien Miller | 077b238 | 2005-12-31 16:22:32 +1100 | [diff] [blame] | 197 | #define CHAN_RBUF 16*1024 |
| 198 | |
Ben Lindstrom | cf15944 | 2002-03-26 03:26:24 +0000 | [diff] [blame] | 199 | /* check whether 'efd' is still in use */ |
| 200 | #define CHANNEL_EFD_INPUT_ACTIVE(c) \ |
djm@openbsd.org | 97f4d30 | 2017-04-30 23:13:25 +0000 | [diff] [blame] | 201 | (c->extended_usage == CHAN_EXTENDED_READ && \ |
Ben Lindstrom | cf15944 | 2002-03-26 03:26:24 +0000 | [diff] [blame] | 202 | (c->efd != -1 || \ |
| 203 | buffer_len(&c->extended) > 0)) |
| 204 | #define CHANNEL_EFD_OUTPUT_ACTIVE(c) \ |
djm@openbsd.org | 97f4d30 | 2017-04-30 23:13:25 +0000 | [diff] [blame] | 205 | (c->extended_usage == CHAN_EXTENDED_WRITE && \ |
Darren Tucker | ce377c3 | 2005-07-14 17:05:51 +1000 | [diff] [blame] | 206 | c->efd != -1 && (!(c->flags & (CHAN_EOF_RCVD|CHAN_CLOSE_RCVD)) || \ |
Ben Lindstrom | cf15944 | 2002-03-26 03:26:24 +0000 | [diff] [blame] | 207 | buffer_len(&c->extended) > 0)) |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 208 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 209 | /* channel management */ |
| 210 | |
Damien Miller | d47c62a | 2005-12-13 19:33:57 +1100 | [diff] [blame] | 211 | Channel *channel_by_id(int); |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 212 | Channel *channel_by_remote_id(int); |
Ben Lindstrom | 16ae3d0 | 2001-07-04 04:02:36 +0000 | [diff] [blame] | 213 | Channel *channel_lookup(int); |
Ben Lindstrom | 4fed2be | 2002-06-25 23:17:36 +0000 | [diff] [blame] | 214 | Channel *channel_new(char *, int, int, int, int, u_int, u_int, int, char *, int); |
Damien Miller | d310d51 | 2008-06-16 07:59:23 +1000 | [diff] [blame] | 215 | void channel_set_fds(int, int, int, int, int, int, int, u_int); |
Ben Lindstrom | 809744e | 2001-07-04 05:26:06 +0000 | [diff] [blame] | 216 | void channel_free(Channel *); |
| 217 | void channel_free_all(void); |
Ben Lindstrom | 809744e | 2001-07-04 05:26:06 +0000 | [diff] [blame] | 218 | void channel_stop_listening(void); |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 219 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 220 | void channel_send_open(int); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 221 | void channel_request_start(int, char *, int); |
Damien Miller | 39eda6e | 2005-11-05 14:52:50 +1100 | [diff] [blame] | 222 | void channel_register_cleanup(int, channel_callback_fn *, int); |
Damien Miller | d530f5f | 2010-05-21 14:57:10 +1000 | [diff] [blame] | 223 | void channel_register_open_confirm(int, channel_open_fn *, void *); |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 224 | void channel_register_filter(int, channel_infilter_fn *, |
Darren Tucker | 84c56f5 | 2008-06-13 04:55:46 +1000 | [diff] [blame] | 225 | channel_outfilter_fn *, channel_filter_cleanup_fn *, void *); |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 226 | void channel_register_status_confirm(int, channel_confirm_cb *, |
| 227 | channel_confirm_abandon_cb *, void *); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 228 | void channel_cancel_cleanup(int); |
Ben Lindstrom | 16d29d5 | 2001-07-18 16:01:46 +0000 | [diff] [blame] | 229 | int channel_close_fd(int *); |
Damien Miller | 0e220db | 2004-06-15 10:34:08 +1000 | [diff] [blame] | 230 | void channel_send_window_changes(void); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 231 | |
markus@openbsd.org | 8d05784 | 2016-09-30 09:19:13 +0000 | [diff] [blame] | 232 | /* mux proxy support */ |
| 233 | |
| 234 | int channel_proxy_downstream(Channel *mc); |
| 235 | int channel_proxy_upstream(Channel *, int, u_int32_t, void *); |
| 236 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 237 | /* protocol handler */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 238 | |
markus@openbsd.org | 3fdc88a | 2015-01-19 20:07:45 +0000 | [diff] [blame] | 239 | int channel_input_data(int, u_int32_t, void *); |
| 240 | int channel_input_extended_data(int, u_int32_t, void *); |
| 241 | int channel_input_ieof(int, u_int32_t, void *); |
| 242 | int channel_input_oclose(int, u_int32_t, void *); |
| 243 | int channel_input_open_confirmation(int, u_int32_t, void *); |
| 244 | int channel_input_open_failure(int, u_int32_t, void *); |
markus@openbsd.org | 3fdc88a | 2015-01-19 20:07:45 +0000 | [diff] [blame] | 245 | int channel_input_window_adjust(int, u_int32_t, void *); |
| 246 | int channel_input_status_confirm(int, u_int32_t, void *); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 247 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 248 | /* file descriptor handling (read/write) */ |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 249 | |
Damien Miller | a650875 | 2012-04-22 11:21:10 +1000 | [diff] [blame] | 250 | void channel_prepare_select(fd_set **, fd_set **, int *, u_int*, |
| 251 | time_t*, int); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 252 | void channel_after_select(fd_set *, fd_set *); |
| 253 | void channel_output_poll(void); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 254 | |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 255 | int channel_not_very_much_buffered_data(void); |
| 256 | void channel_close_all(void); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 257 | int channel_still_open(void); |
| 258 | char *channel_open_message(void); |
| 259 | int channel_find_open(void); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 260 | |
Ben Lindstrom | 908afed | 2001-10-03 17:34:59 +0000 | [diff] [blame] | 261 | /* tcp forwarding */ |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 262 | struct Forward; |
| 263 | struct ForwardOptions; |
Ben Lindstrom | 908afed | 2001-10-03 17:34:59 +0000 | [diff] [blame] | 264 | void channel_set_af(int af); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 265 | void channel_permit_all_opens(void); |
| 266 | void channel_add_permitted_opens(char *, int); |
Damien Miller | a765cf4 | 2006-07-24 14:08:13 +1000 | [diff] [blame] | 267 | int channel_add_adm_permitted_opens(char *, int); |
Damien Miller | c608148 | 2012-04-22 11:18:53 +1000 | [diff] [blame] | 268 | void channel_disable_adm_local_opens(void); |
Darren Tucker | 68afb8c | 2011-10-02 18:59:03 +1100 | [diff] [blame] | 269 | void channel_update_permitted_opens(int, int); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 270 | void channel_clear_permitted_opens(void); |
Damien Miller | 9b439df | 2006-07-24 14:04:00 +1000 | [diff] [blame] | 271 | void channel_clear_adm_permitted_opens(void); |
Darren Tucker | e7140f2 | 2008-06-10 23:01:51 +1000 | [diff] [blame] | 272 | void channel_print_adm_permitted_opens(void); |
dtucker@openbsd.org | 858252f | 2017-02-01 02:59:09 +0000 | [diff] [blame] | 273 | Channel *channel_connect_to_port(const char *, u_short, char *, char *, int *, |
| 274 | const char **); |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 275 | Channel *channel_connect_to_path(const char *, char *, char *); |
Damien Miller | e1537f9 | 2010-01-26 13:26:22 +1100 | [diff] [blame] | 276 | Channel *channel_connect_stdio_fwd(const char*, u_short, int, int); |
Damien Miller | 4b3ed64 | 2014-07-02 15:29:40 +1000 | [diff] [blame] | 277 | Channel *channel_connect_by_listen_address(const char *, u_short, |
| 278 | char *, char *); |
Damien Miller | 7acefbb | 2014-07-18 14:11:24 +1000 | [diff] [blame] | 279 | Channel *channel_connect_by_listen_path(const char *, char *, char *); |
| 280 | int channel_request_remote_forwarding(struct Forward *); |
| 281 | int channel_setup_local_fwd_listener(struct Forward *, struct ForwardOptions *); |
| 282 | int channel_request_rforward_cancel(struct Forward *); |
| 283 | int channel_setup_remote_fwd_listener(struct Forward *, int *, struct ForwardOptions *); |
| 284 | int channel_cancel_rport_listener(struct Forward *); |
| 285 | int channel_cancel_lport_listener(struct Forward *, int, struct ForwardOptions *); |
Darren Tucker | 1338b9e | 2011-10-02 18:57:35 +1100 | [diff] [blame] | 286 | int permitopen_port(const char *); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 287 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 288 | /* x11 forwarding */ |
| 289 | |
djm@openbsd.org | 1bf477d | 2015-07-01 02:26:31 +0000 | [diff] [blame] | 290 | void channel_set_x11_refuse_time(u_int); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 291 | int x11_connect_display(void); |
Damien Miller | 2b9b045 | 2005-07-17 17:19:24 +1000 | [diff] [blame] | 292 | int x11_create_display_inet(int, int, int, u_int *, int **); |
Damien Miller | 17e7ed0 | 2005-06-17 12:54:33 +1000 | [diff] [blame] | 293 | void x11_request_forwarding_with_spoofing(int, const char *, const char *, |
Damien Miller | 6d7b437 | 2011-06-23 08:31:57 +1000 | [diff] [blame] | 294 | const char *, int); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 295 | |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 296 | /* channel close */ |
Damien Miller | 33b1356 | 2000-04-04 14:38:59 +1000 | [diff] [blame] | 297 | |
Damien Miller | 3ec2759 | 2001-10-12 11:35:04 +1000 | [diff] [blame] | 298 | int chan_is_dead(Channel *, int); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 299 | void chan_mark_dead(Channel *); |
Ben Lindstrom | 4cc240d | 2001-07-04 04:46:56 +0000 | [diff] [blame] | 300 | |
Damien Miller | 5144df9 | 2002-01-22 23:28:45 +1100 | [diff] [blame] | 301 | /* channel events */ |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 302 | |
Damien Miller | 5144df9 | 2002-01-22 23:28:45 +1100 | [diff] [blame] | 303 | void chan_rcvd_oclose(Channel *); |
Damien Miller | bab9bd4 | 2008-05-19 16:06:47 +1000 | [diff] [blame] | 304 | void chan_rcvd_eow(Channel *); /* SSH2-only */ |
Damien Miller | 5144df9 | 2002-01-22 23:28:45 +1100 | [diff] [blame] | 305 | void chan_read_failed(Channel *); |
| 306 | void chan_ibuf_empty(Channel *); |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 307 | |
Damien Miller | 5144df9 | 2002-01-22 23:28:45 +1100 | [diff] [blame] | 308 | void chan_rcvd_ieof(Channel *); |
| 309 | void chan_write_failed(Channel *); |
| 310 | void chan_obuf_empty(Channel *); |
Ben Lindstrom | e9c9991 | 2001-06-09 00:41:05 +0000 | [diff] [blame] | 311 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 312 | #endif |