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annotate cli-chansession.c @ 39:0883c0906870

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tty raw mode support works mostly adding cli-{chansession,runopts}.c which were missing
author Matt Johnston <matt@ucc.asn.au>
date Fri, 30 Jul 2004 12:29:53 +0000
parents
children b4874d772210
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39
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1 #include "includes.h"
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2 #include "packet.h"
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3 #include "buffer.h"
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4 #include "session.h"
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5 #include "dbutil.h"
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6 #include "channel.h"
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7 #include "ssh.h"
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8 #include "runopts.h"
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9
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10 static void cli_closechansess(struct Channel *channel);
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11 static int cli_initchansess(struct Channel *channel);
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12
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13 static void start_channel_request(struct Channel *channel, unsigned char *type);
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14
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15 static void send_chansess_pty_req(struct Channel *channel);
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16 static void send_chansess_shell_req(struct Channel *channel);
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17
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18 static void cli_tty_setup();
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19 static void cli_tty_cleanup();
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20
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21 static const struct ChanType clichansess = {
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22 0, /* sepfds */
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23 "session", /* name */
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24 cli_initchansess, /* inithandler */
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25 NULL, /* checkclosehandler */
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26 NULL, /* reqhandler */
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27 cli_closechansess, /* closehandler */
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28 };
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29
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30 /* If the main session goes, we close it up */
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31 static void cli_closechansess(struct Channel *channel) {
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32
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33 /* This channel hasn't gone yet, so we have > 1 */
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34 if (ses.chancount > 1) {
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35 dropbear_log(LOG_INFO, "Waiting for other channels to close...");
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36 }
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37
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38 cli_tty_cleanup(); /* Restore tty modes etc */
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39
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40 }
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41
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42 static void start_channel_request(struct Channel *channel,
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43 unsigned char *type) {
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44
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45 CHECKCLEARTOWRITE();
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46 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
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47 buf_putint(ses.writepayload, channel->remotechan);
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48
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49 buf_putstring(ses.writepayload, type, strlen(type));
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50
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51 }
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52
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53
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54 /* Taken from OpenSSH's sshtty.c:
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55 * RCSID("OpenBSD: sshtty.c,v 1.5 2003/09/19 17:43:35 markus Exp "); */
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56 static void cli_tty_setup() {
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57
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58 struct termios tio;
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59
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60 TRACE(("enter cli_pty_setup"));
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61
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62 if (cli_ses.tty_raw_mode == 1) {
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63 TRACE(("leave cli_tty_setup: already in raw mode!"));
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64 return;
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65 }
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66
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67 if (tcgetattr(STDIN_FILENO, &tio) == -1) {
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68 dropbear_exit("Failed to set raw TTY mode");
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69 }
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70
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71 /* make a copy */
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72 cli_ses.saved_tio = tio;
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73
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74 tio.c_iflag |= IGNPAR;
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75 tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
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76 #ifdef IUCLC
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77 tio.c_iflag &= ~IUCLC;
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78 #endif
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79 tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
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80 #ifdef IEXTEN
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81 tio.c_lflag &= ~IEXTEN;
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82 #endif
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83 tio.c_oflag &= ~OPOST;
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84 tio.c_cc[VMIN] = 1;
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85 tio.c_cc[VTIME] = 0;
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86 if (tcsetattr(STDIN_FILENO, TCSADRAIN, &tio) == -1) {
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87 dropbear_exit("Failed to set raw TTY mode");
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88 }
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89
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90 cli_ses.tty_raw_mode = 1;
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91 TRACE(("leave cli_tty_setup"));
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92 }
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93
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94 static void cli_tty_cleanup() {
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95
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96 TRACE(("enter cli_tty_cleanup"));
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97
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98 if (cli_ses.tty_raw_mode == 0) {
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99 TRACE(("leave cli_tty_cleanup: not in raw mode"));
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100 }
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101
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102 if (tcsetattr(STDIN_FILENO, TCSADRAIN, &cli_ses.saved_tio) == -1) {
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103 dropbear_log(LOG_WARNING, "Failed restoring TTY");
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104 } else {
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105 cli_ses.tty_raw_mode = 0;
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106 }
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107
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108 TRACE(("leave cli_tty_cleanup"));
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109 }
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110
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111 static void send_chansess_pty_req(struct Channel *channel) {
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112
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113 unsigned char* termmodes = "\0";
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114 unsigned char* term = NULL;
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115 int termc = 80, termr = 25, termw = 0, termh = 0; /* XXX TODO matt */
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116
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117 TRACE(("enter send_chansess_pty_req"));
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118 start_channel_request(channel, "pty-req");
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119
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120 term = getenv("TERM");
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121 if (term == NULL) {
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122 term = "vt100";
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123 }
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124
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125 /* XXX TODO */
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126 buf_putbyte(ses.writepayload, 0); /* Don't want replies */
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127 buf_putstring(ses.writepayload, term, strlen(term));
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128 buf_putint(ses.writepayload, termc); /* Cols */
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129 buf_putint(ses.writepayload, termr); /* Rows */
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130 buf_putint(ses.writepayload, termw); /* Width */
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131 buf_putint(ses.writepayload, termh); /* Height */
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132
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133 buf_putstring(ses.writepayload, termmodes, 1); /* XXX TODO */
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134 //m_free(termmodes);
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135
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136 encrypt_packet();
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137 TRACE(("leave send_chansess_pty_req"));
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138 }
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139
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140 static void send_chansess_shell_req(struct Channel *channel) {
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141
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142 unsigned char* reqtype = NULL;
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143
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144 TRACE(("enter send_chansess_shell_req"));
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145
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146 if (cli_opts.cmd) {
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147 reqtype = "exec";
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148 } else {
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149 reqtype = "shell";
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150 }
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151
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152 start_channel_request(channel, reqtype);
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153
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154 /* XXX TODO */
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155 buf_putbyte(ses.writepayload, 0); /* Don't want replies */
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156 if (cli_opts.cmd) {
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157 buf_putstring(ses.writepayload, cli_opts.cmd, strlen(cli_opts.cmd));
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158 }
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159
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160 encrypt_packet();
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161 TRACE(("leave send_chansess_shell_req"));
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162 }
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163
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164 static int cli_initchansess(struct Channel *channel) {
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165
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166 channel->infd = STDOUT_FILENO;
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167 //channel->outfd = STDIN_FILENO;
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168 //channel->errfd = STDERR_FILENO;
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169
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170 if (cli_opts.wantpty) {
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171 send_chansess_pty_req(channel);
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172 }
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173
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174 cli_opts.cmd = "df";
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175 send_chansess_shell_req(channel);
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176
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177 if (cli_opts.wantpty) {
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178 cli_tty_setup();
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179 }
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180
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181 return 0; /* Success */
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182
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183 }
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184
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185
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186 void cli_send_chansess_request() {
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187
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188 TRACE(("enter cli_send_chansess_request"));
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189 if (send_msg_channel_open_init(STDIN_FILENO, &clichansess)
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190 == DROPBEAR_FAILURE) {
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191 dropbear_exit("Couldn't open initial channel");
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192 }
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193
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194 /* No special channel request data */
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195 encrypt_packet();
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196 TRACE(("leave cli_send_chansess_request"));
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197
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198 }