Mercurial > dropbear

annotate cli-chansession.c @ 741:eafdf8b363f5 kexguess

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Get rid of client/server specific buf_match_algo, use single function with a couple of if statements instead
author Matt Johnston <matt@ucc.asn.au>
date Sat, 30 Mar 2013 23:55:05 +0800
parents 4a274f47eabd
children ac2158e3e403 b2d4205b0897
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
74
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * Copyright (c) 2004 by Mihnea Stoenescu
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6 * All rights reserved.
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7 *
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8 * Permission is hereby granted, free of charge, to any person obtaining a copy
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9 * of this software and associated documentation files (the "Software"), to deal
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10 * in the Software without restriction, including without limitation the rights
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11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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12 * copies of the Software, and to permit persons to whom the Software is
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13 * furnished to do so, subject to the following conditions:
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14 *
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15 * The above copyright notice and this permission notice shall be included in
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16 * all copies or substantial portions of the Software.
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17 *
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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24 * SOFTWARE. */
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25
39
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26 #include "includes.h"
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27 #include "packet.h"
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28 #include "buffer.h"
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29 #include "session.h"
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30 #include "dbutil.h"
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31 #include "channel.h"
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32 #include "ssh.h"
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33 #include "runopts.h"
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34 #include "termcodes.h"
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35 #include "chansession.h"
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36 #include "agentfwd.h"
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37
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38 static void cli_closechansess(struct Channel *channel);
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39 static int cli_initchansess(struct Channel *channel);
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40 static void cli_chansessreq(struct Channel *channel);
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41 static void send_chansess_pty_req(struct Channel *channel);
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42 static void send_chansess_shell_req(struct Channel *channel);
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43 static void cli_escape_handler(struct Channel *channel, unsigned char* buf, int *len);
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44
39
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45
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46 static void cli_tty_setup();
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47
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48 const struct ChanType clichansess = {
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49 0, /* sepfds */
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50 "session", /* name */
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51 cli_initchansess, /* inithandler */
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52 NULL, /* checkclosehandler */
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53 cli_chansessreq, /* reqhandler */
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54 cli_closechansess, /* closehandler */
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55 };
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56
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57 static void cli_chansessreq(struct Channel *channel) {
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58
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59 unsigned char* type = NULL;
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60 int wantreply;
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61
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62 TRACE(("enter cli_chansessreq"))
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63
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64 type = buf_getstring(ses.payload, NULL);
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65 wantreply = buf_getbool(ses.payload);
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66
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67 if (strcmp(type, "exit-status") == 0) {
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68 cli_ses.retval = buf_getint(ses.payload);
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69 TRACE(("got exit-status of '%d'", cli_ses.retval))
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70 } else if (strcmp(type, "exit-signal") == 0) {
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71 TRACE(("got exit-signal, ignoring it"))
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72 } else {
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73 TRACE(("unknown request '%s'", type))
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74 send_msg_channel_failure(channel);
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75 goto out;
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76 }
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77
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78 out:
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79 m_free(type);
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80 }
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81
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82
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83 /* If the main session goes, we close it up */
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84 static void cli_closechansess(struct Channel *UNUSED(channel)) {
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85
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86 /* This channel hasn't gone yet, so we have > 1 */
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87 if (ses.chancount > 1) {
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88 dropbear_log(LOG_INFO, "Waiting for other channels to close...");
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89 }
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90
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91 cli_tty_cleanup(); /* Restore tty modes etc */
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92
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93 }
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94
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95 void cli_start_send_channel_request(struct Channel *channel,
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96 unsigned char *type) {
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97
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98 CHECKCLEARTOWRITE();
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99 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
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100 buf_putint(ses.writepayload, channel->remotechan);
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101
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102 buf_putstring(ses.writepayload, type, strlen(type));
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103
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104 }
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105
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106 /* Taken from OpenSSH's sshtty.c:
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107 * RCSID("OpenBSD: sshtty.c,v 1.5 2003/09/19 17:43:35 markus Exp "); */
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108 static void cli_tty_setup() {
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109
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110 struct termios tio;
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111
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112 TRACE(("enter cli_pty_setup"))
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113
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114 if (cli_ses.tty_raw_mode == 1) {
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115 TRACE(("leave cli_tty_setup: already in raw mode!"))
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116 return;
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117 }
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118
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119 if (tcgetattr(STDIN_FILENO, &tio) == -1) {
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120 dropbear_exit("Failed to set raw TTY mode");
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121 }
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122
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123 /* make a copy */
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124 cli_ses.saved_tio = tio;
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125
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126 tio.c_iflag |= IGNPAR;
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127 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
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128 #ifdef IUCLC
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129 tio.c_iflag &= ~IUCLC;
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130 #endif
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131 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
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132 #ifdef IEXTEN
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133 tio.c_lflag &= ~IEXTEN;
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134 #endif
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135 tio.c_oflag &= ~OPOST;
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136 tio.c_cc[VMIN] = 1;
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137 tio.c_cc[VTIME] = 0;
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138 if (tcsetattr(STDIN_FILENO, TCSADRAIN, &tio) == -1) {
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139 dropbear_exit("Failed to set raw TTY mode");
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140 }
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141
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142 cli_ses.tty_raw_mode = 1;
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143 TRACE(("leave cli_tty_setup"))
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144 }
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145
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146 void cli_tty_cleanup() {
39
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parents:
diff changeset
147
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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diff changeset
148 TRACE(("enter cli_tty_cleanup"))
39
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parents:
diff changeset
149
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
150 if (cli_ses.tty_raw_mode == 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 109
diff changeset
151 TRACE(("leave cli_tty_cleanup: not in raw mode"))
40
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diff changeset
152 return;
39
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
153 }
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
154
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
155 if (tcsetattr(STDIN_FILENO, TCSADRAIN, &cli_ses.saved_tio) == -1) {
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
156 dropbear_log(LOG_WARNING, "Failed restoring TTY");
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
157 } else {
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
158 cli_ses.tty_raw_mode = 0;
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
159 }
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
160
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 109
diff changeset
161 TRACE(("leave cli_tty_cleanup"))
39
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parents:
diff changeset
162 }
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
163
40
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diff changeset
164 static void put_termcodes() {
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diff changeset
165
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diff changeset
166 struct termios tio;
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parents: 39
diff changeset
167 unsigned int sshcode;
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parents: 39
diff changeset
168 const struct TermCode *termcode;
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parents: 39
diff changeset
169 unsigned int value;
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parents: 39
diff changeset
170 unsigned int mapcode;
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parents: 39
diff changeset
171
311
36d21680a9d3 A few more fixups, make sure that variable declarations are the
Matt Johnston <matt@ucc.asn.au>
parents: 300
diff changeset
172 unsigned int bufpos1, bufpos2;
300
baea1d43e7eb Some cleanups/fixes for various TRACE statements
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
173
311
36d21680a9d3 A few more fixups, make sure that variable declarations are the
Matt Johnston <matt@ucc.asn.au>
parents: 300
diff changeset
174 TRACE(("enter put_termcodes"))
40
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diff changeset
175
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parents: 39
diff changeset
176 if (tcgetattr(STDIN_FILENO, &tio) == -1) {
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diff changeset
177 dropbear_log(LOG_WARNING, "Failed reading termmodes");
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parents: 39
diff changeset
178 buf_putint(ses.writepayload, 1); /* Just the terminator */
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parents: 39
diff changeset
179 buf_putbyte(ses.writepayload, 0); /* TTY_OP_END */
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diff changeset
180 return;
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diff changeset
181 }
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diff changeset
182
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diff changeset
183 bufpos1 = ses.writepayload->pos;
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parents: 39
diff changeset
184 buf_putint(ses.writepayload, 0); /* A placeholder for the final length */
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diff changeset
185
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diff changeset
186 /* As with Dropbear server, we ignore baud rates for now */
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parents: 39
diff changeset
187 for (sshcode = 1; sshcode < MAX_TERMCODE; sshcode++) {
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parents: 39
diff changeset
188
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diff changeset
189 termcode = &termcodes[sshcode];
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diff changeset
190 mapcode = termcode->mapcode;
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diff changeset
191
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diff changeset
192 switch (termcode->type) {
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diff changeset
193
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diff changeset
194 case TERMCODE_NONE:
b4874d772210 - Added terminal mode handling etc for the client, and window change
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parents: 39
diff changeset
195 continue;
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diff changeset
196
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diff changeset
197 case TERMCODE_CONTROLCHAR:
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parents: 39
diff changeset
198 value = tio.c_cc[mapcode];
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parents: 39
diff changeset
199 break;
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diff changeset
200
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parents: 39
diff changeset
201 case TERMCODE_INPUT:
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parents: 39
diff changeset
202 value = tio.c_iflag & mapcode;
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diff changeset
203 break;
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diff changeset
204
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diff changeset
205 case TERMCODE_OUTPUT:
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parents: 39
diff changeset
206 value = tio.c_oflag & mapcode;
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parents: 39
diff changeset
207 break;
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diff changeset
208
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diff changeset
209 case TERMCODE_LOCAL:
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parents: 39
diff changeset
210 value = tio.c_lflag & mapcode;
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parents: 39
diff changeset
211 break;
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diff changeset
212
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diff changeset
213 case TERMCODE_CONTROL:
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diff changeset
214 value = tio.c_cflag & mapcode;
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parents: 39
diff changeset
215 break;
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diff changeset
216
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diff changeset
217 default:
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parents: 39
diff changeset
218 continue;
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Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
219
b4874d772210 - Added terminal mode handling etc for the client, and window change
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diff changeset
220 }
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diff changeset
221
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diff changeset
222 /* If we reach here, we have something to say */
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diff changeset
223 buf_putbyte(ses.writepayload, sshcode);
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diff changeset
224 buf_putint(ses.writepayload, value);
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diff changeset
225 }
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parents: 39
diff changeset
226
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parents: 39
diff changeset
227 buf_putbyte(ses.writepayload, 0); /* THE END, aka TTY_OP_END */
b4874d772210 - Added terminal mode handling etc for the client, and window change
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parents: 39
diff changeset
228
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diff changeset
229 /* Put the string length at the start of the buffer */
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diff changeset
230 bufpos2 = ses.writepayload->pos;
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diff changeset
231
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diff changeset
232 buf_setpos(ses.writepayload, bufpos1); /* Jump back */
61
3a4f0ef1e8c3 Write the correct termcodes length
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
233 buf_putint(ses.writepayload, bufpos2 - bufpos1 - 4); /* len(termcodes) */
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
234 buf_setpos(ses.writepayload, bufpos2); /* Back where we were */
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
235
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
236 TRACE(("leave put_termcodes"))
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
237 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
238
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
239 static void put_winsize() {
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diff changeset
240
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parents: 39
diff changeset
241 struct winsize ws;
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diff changeset
242
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diff changeset
243 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0) {
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parents: 39
diff changeset
244 /* Some sane defaults */
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parents: 39
diff changeset
245 ws.ws_row = 25;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
246 ws.ws_col = 80;
b4874d772210 - Added terminal mode handling etc for the client, and window change
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parents: 39
diff changeset
247 ws.ws_xpixel = 0;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
248 ws.ws_ypixel = 0;
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
249 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
250
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
251 buf_putint(ses.writepayload, ws.ws_col); /* Cols */
b4874d772210 - Added terminal mode handling etc for the client, and window change
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parents: 39
diff changeset
252 buf_putint(ses.writepayload, ws.ws_row); /* Rows */
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Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
253 buf_putint(ses.writepayload, ws.ws_xpixel); /* Width */
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
254 buf_putint(ses.writepayload, ws.ws_ypixel); /* Height */
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parents: 39
diff changeset
255
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
256 }
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
257
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
258 static void sigwinch_handler(int UNUSED(unused)) {
41
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
259
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
260 cli_ses.winchange = 1;
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
261
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
262 }
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
263
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
264 void cli_chansess_winchange() {
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
265
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
266 unsigned int i;
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
267 struct Channel *channel = NULL;
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
268
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
269 for (i = 0; i < ses.chansize; i++) {
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
270 channel = ses.channels[i];
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
271 if (channel != NULL && channel->type == &clichansess) {
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
272 CHECKCLEARTOWRITE();
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
273 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
274 buf_putint(ses.writepayload, channel->remotechan);
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
275 buf_putstring(ses.writepayload, "window-change", 13);
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
276 buf_putbyte(ses.writepayload, 0); /* FALSE says the spec */
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
277 put_winsize();
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
278 encrypt_packet();
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
279 }
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
280 }
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
281 cli_ses.winchange = 0;
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
282 }
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
283
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
284 static void send_chansess_pty_req(struct Channel *channel) {
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parents:
diff changeset
285
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
286 unsigned char* term = NULL;
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
287
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
288 TRACE(("enter send_chansess_pty_req"))
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
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parents: 39
diff changeset
289
560
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
290 cli_start_send_channel_request(channel, "pty-req");
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
292 /* Don't want replies */
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
293 buf_putbyte(ses.writepayload, 0);
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
294
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
295 /* Get the terminal */
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
296 term = getenv("TERM");
0883c0906870 tty raw mode support works mostly
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parents:
diff changeset
297 if (term == NULL) {
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
298 term = "vt100"; /* Seems a safe default */
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
299 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
300 buf_putstring(ses.writepayload, term, strlen(term));
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301
40
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
302 /* Window size */
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
303 put_winsize();
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
304
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
305 /* Terminal mode encoding */
b4874d772210 - Added terminal mode handling etc for the client, and window change
Matt Johnston <matt@ucc.asn.au>
parents: 39
diff changeset
306 put_termcodes();
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
307
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
308 encrypt_packet();
41
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
309
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
310 /* Set up a window-change handler */
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
311 if (signal(SIGWINCH, sigwinch_handler) == SIG_ERR) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 582
diff changeset
312 dropbear_exit("Signal error");
41
18eccbfb9641 added window-size change handling
Matt Johnston <matt@ucc.asn.au>
parents: 40
diff changeset
313 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
314 TRACE(("leave send_chansess_pty_req"))
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
315 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
316
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
317 static void send_chansess_shell_req(struct Channel *channel) {
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
318
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
319 unsigned char* reqtype = NULL;
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
320
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
321 TRACE(("enter send_chansess_shell_req"))
39
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parents:
diff changeset
322
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
323 if (cli_opts.cmd) {
497
ae600f1eef81 - Enable -s for specifying a subsystem (such as sftp)
Matt Johnston <matt@ucc.asn.au>
parents: 485
diff changeset
324 if (cli_opts.is_subsystem) {
ae600f1eef81 - Enable -s for specifying a subsystem (such as sftp)
Matt Johnston <matt@ucc.asn.au>
parents: 485
diff changeset
325 reqtype = "subsystem";
ae600f1eef81 - Enable -s for specifying a subsystem (such as sftp)
Matt Johnston <matt@ucc.asn.au>
parents: 485
diff changeset
326 } else {
ae600f1eef81 - Enable -s for specifying a subsystem (such as sftp)
Matt Johnston <matt@ucc.asn.au>
parents: 485
diff changeset
327 reqtype = "exec";
ae600f1eef81 - Enable -s for specifying a subsystem (such as sftp)
Matt Johnston <matt@ucc.asn.au>
parents: 485
diff changeset
328 }
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 } else {
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 reqtype = "shell";
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
332
560
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
333 cli_start_send_channel_request(channel, reqtype);
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
335 /* XXX TODO */
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
336 buf_putbyte(ses.writepayload, 0); /* Don't want replies */
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
337 if (cli_opts.cmd) {
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
338 buf_putstring(ses.writepayload, cli_opts.cmd, strlen(cli_opts.cmd));
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
339 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
341 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
342 TRACE(("leave send_chansess_shell_req"))
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
343 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
345 /* Shared for normal client channel and netcat-alike */
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
346 static int cli_init_stdpipe_sess(struct Channel *channel) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
347 channel->writefd = STDOUT_FILENO;
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
348 setnonblocking(STDOUT_FILENO);
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
349
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
350 channel->readfd = STDIN_FILENO;
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
351 setnonblocking(STDIN_FILENO);
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
352
107
Matt Johnston <matt@ucc.asn.au>
parents: 99
diff changeset
353 channel->errfd = STDERR_FILENO;
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
354 setnonblocking(STDERR_FILENO);
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
355
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
356 channel->extrabuf = cbuf_new(opts.recv_window);
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
357 return 0;
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
358 }
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
359
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
360 static int cli_initchansess(struct Channel *channel) {
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
361
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
362 cli_init_stdpipe_sess(channel);
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363
560
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
364 #ifdef ENABLE_CLI_AGENTFWD
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
365 if (cli_opts.agent_fwd) {
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
366 cli_setup_agent(channel);
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
367 }
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
368 #endif
52d7301e46bd Agent forwarding works
Matt Johnston <matt@ucc.asn.au>
parents: 551
diff changeset
369
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
370 if (cli_opts.wantpty) {
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371 send_chansess_pty_req(channel);
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
372 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
373
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
374 send_chansess_shell_req(channel);
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
376 if (cli_opts.wantpty) {
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 cli_tty_setup();
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
378 channel->read_mangler = cli_escape_handler;
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
379 cli_ses.last_char = '\r';
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
380 }
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 return 0; /* Success */
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
385 #ifdef ENABLE_CLI_NETCAT
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
386
582
6b9d12477953 - make structure static
Matt Johnston <matt@ucc.asn.au>
parents: 564
diff changeset
387 static const struct ChanType cli_chan_netcat = {
564
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
388 0, /* sepfds */
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
389 "direct-tcpip",
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
390 cli_init_stdpipe_sess, /* inithandler */
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
391 NULL,
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
392 NULL,
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
393 cli_closechansess
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
394 };
fad3eb63b907 - Move netcat struct to where it stays in scope.
Matt Johnston <matt@ucc.asn.au>
parents: 560
diff changeset
395
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
396 void cli_send_netcat_request() {
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
398 const unsigned char* source_host = "127.0.0.1";
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
399 const int source_port = 22;
296
6b41e2cbf071 A hack to make dbclient to tcp forwarding netcat style.
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
400
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
401 cli_opts.wantpty = 0;
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
402
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
403 if (send_msg_channel_open_init(STDIN_FILENO, &cli_chan_netcat)
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404 == DROPBEAR_FAILURE) {
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405 dropbear_exit("Couldn't open initial channel");
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 }
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
408 buf_putstring(ses.writepayload, cli_opts.netcat_host,
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
409 strlen(cli_opts.netcat_host));
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
410 buf_putint(ses.writepayload, cli_opts.netcat_port);
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
411
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
412 /* originator ip - localhost is accurate enough */
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
413 buf_putstring(ses.writepayload, source_host, strlen(source_host));
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
414 buf_putint(ses.writepayload, source_port);
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
415
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
416 encrypt_packet();
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
417 TRACE(("leave cli_send_chansess_request"))
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
418 }
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
419 #endif
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
420
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
421 void cli_send_chansess_request() {
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
422
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
423 TRACE(("enter cli_send_chansess_request"))
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
424
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
425 if (send_msg_channel_open_init(STDIN_FILENO, &clichansess)
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
426 == DROPBEAR_FAILURE) {
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
427 dropbear_exit("Couldn't open initial channel");
296
6b41e2cbf071 A hack to make dbclient to tcp forwarding netcat style.
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
428 }
6b41e2cbf071 A hack to make dbclient to tcp forwarding netcat style.
Matt Johnston <matt@ucc.asn.au>
parents: 253
diff changeset
429
485
12d845ab7b5f Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents: 478
diff changeset
430 /* No special channel request data */
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
432 TRACE(("leave cli_send_chansess_request"))
39
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433
0883c0906870 tty raw mode support works mostly
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 }
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
435
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436 // returns 1 if the character should be consumed, 0 to pass through
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437 static int
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438 do_escape(unsigned char c) {
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439 switch (c) {
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440 case '.':
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441 dropbear_exit("Terminated");
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442 return 1;
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443 break;
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444 case 0x1a:
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445 // ctrl-z
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446 cli_tty_cleanup();
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447 kill(getpid(), SIGTSTP);
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448 // after continuation
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449 cli_tty_setup();
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450 cli_ses.winchange = 1;
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451 return 1;
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452 break;
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453 }
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454 return 0;
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455 }
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
456
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457 static
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458 void cli_escape_handler(struct Channel *channel, unsigned char* buf, int *len) {
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459 char c;
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460 int skip_char = 0;
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461
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462 // only handle escape characters if they are read one at a time. simplifies
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
463 // the code and avoids nasty people putting ~. at the start of a line to paste
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parents: 594
diff changeset
464 if (*len != 1) {
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Matt Johnston <matt@ucc.asn.au>
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465 cli_ses.last_char = 0x0;
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
466 return;
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
467 }
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
468
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parents: 594
diff changeset
469 c = buf[0];
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470
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diff changeset
471 if (cli_ses.last_char == DROPBEAR_ESCAPE_CHAR) {
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diff changeset
472 skip_char = do_escape(c);
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parents: 594
diff changeset
473 cli_ses.last_char = 0x0;
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
474 } else {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
475 if (c == DROPBEAR_ESCAPE_CHAR) {
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
476 if (cli_ses.last_char == '\r') {
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
477 cli_ses.last_char = DROPBEAR_ESCAPE_CHAR;
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
478 skip_char = 1;
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
479 } else {
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parents: 594
diff changeset
480 cli_ses.last_char = 0x0;
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
481 }
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
482 } else {
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
483 cli_ses.last_char = c;
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
484 }
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
485 }
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
486
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
487 if (skip_char) {
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
488 *len = 0;
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
489 }
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Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
490 }