annotate common-channel.c @ 37:0913e2ee3545

we're nearly there yet
author Matt Johnston <matt@ucc.asn.au>
date Fri, 30 Jul 2004 03:02:19 +0000
parents db2c8e6fb284
children 20563735e8b5
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 /* Handle the multiplexed channels, such as sessions, x11, agent connections */
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26
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27 #include "includes.h"
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28 #include "session.h"
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29 #include "packet.h"
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30 #include "ssh.h"
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31 #include "buffer.h"
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32 #include "dbutil.h"
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33 #include "channel.h"
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34 #include "ssh.h"
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35 #include "tcpfwd-direct.h"
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36 #include "tcpfwd-remote.h"
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37 #include "listener.h"
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38
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39 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
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40 const unsigned char *text, const unsigned char *lang);
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41 static void send_msg_channel_open_confirmation(struct Channel* channel,
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42 unsigned int recvwindow,
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43 unsigned int recvmaxpacket);
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44 static void writechannel(struct Channel *channel);
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45 static void send_msg_channel_window_adjust(struct Channel *channel,
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46 unsigned int incr);
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47 static void send_msg_channel_data(struct Channel *channel, int isextended,
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48 unsigned int exttype);
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49 static void send_msg_channel_eof(struct Channel *channel);
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50 static void send_msg_channel_close(struct Channel *channel);
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51 static void removechannel(struct Channel *channel);
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52 static void deletechannel(struct Channel *channel);
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53 static void checkinitdone(struct Channel *channel);
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54 static void checkclose(struct Channel *channel);
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55
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56 static void closeinfd(struct Channel * channel);
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57 static void closeoutfd(struct Channel * channel, int fd);
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58 static void closechanfd(struct Channel *channel, int fd, int how);
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59
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60 #define FD_UNINIT (-2)
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61 #define FD_CLOSED (-1)
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62
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63 /* Initialise all the channels */
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64 void chaninitialise(const struct ChanType *chantypes[]) {
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65
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66 /* may as well create space for a single channel */
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67 ses.channels = (struct Channel**)m_malloc(sizeof(struct Channel*));
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68 ses.chansize = 1;
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69 ses.channels[0] = NULL;
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70 ses.chancount = 0;
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72 ses.chantypes = chantypes;
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73
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74 #ifdef USING_LISTENERS
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75 listeners_initialise();
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76 #endif
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77
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78 }
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79
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80 /* Clean up channels, freeing allocated memory */
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81 void chancleanup() {
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82
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83 unsigned int i;
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84
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85 TRACE(("enter chancleanup"));
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86 for (i = 0; i < ses.chansize; i++) {
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87 if (ses.channels[i] != NULL) {
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88 TRACE(("channel %d closing", i));
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89 removechannel(ses.channels[i]);
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90 }
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91 }
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92 m_free(ses.channels);
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93 TRACE(("leave chancleanup"));
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94 }
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95
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96 /* Create a new channel entry, send a reply confirm or failure */
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97 /* If remotechan, transwindow and transmaxpacket are not know (for a new
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98 * outgoing connection, with them to be filled on confirmation), they should
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99 * all be set to 0 */
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100 struct Channel* newchannel(unsigned int remotechan,
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101 const struct ChanType *type,
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102 unsigned int transwindow, unsigned int transmaxpacket) {
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103
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104 struct Channel * newchan;
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105 unsigned int i, j;
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106
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107 TRACE(("enter newchannel"));
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108
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109 /* first see if we can use existing channels */
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110 for (i = 0; i < ses.chansize; i++) {
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111 if (ses.channels[i] == NULL) {
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112 break;
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113 }
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114 }
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115
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116 /* otherwise extend the list */
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117 if (i == ses.chansize) {
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118 if (ses.chansize >= MAX_CHANNELS) {
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119 TRACE(("leave newchannel: max chans reached"));
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120 return NULL;
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121 }
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122
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123 /* extend the channels */
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124 ses.channels = (struct Channel**)m_realloc(ses.channels,
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125 (ses.chansize+CHAN_EXTEND_SIZE)*sizeof(struct Channel*));
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126
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127 ses.chansize += CHAN_EXTEND_SIZE;
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128
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129 /* set the new channels to null */
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130 for (j = i; j < ses.chansize; j++) {
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131 ses.channels[j] = NULL;
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132 }
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133
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134 }
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135
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136 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
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137 newchan->type = type;
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138 newchan->index = i;
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139 newchan->sentclosed = newchan->recvclosed = 0;
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140 newchan->senteof = newchan->recveof = 0;
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141
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142 newchan->remotechan = remotechan;
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143 newchan->transwindow = transwindow;
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144 newchan->transmaxpacket = transmaxpacket;
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145
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146 newchan->typedata = NULL;
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147 newchan->infd = FD_UNINIT;
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148 newchan->outfd = FD_UNINIT;
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149 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
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150 newchan->initconn = 0;
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151
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152 newchan->writebuf = buf_new(RECV_MAXWINDOW);
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153 newchan->recvwindow = RECV_MAXWINDOW;
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154 newchan->recvmaxpacket = RECV_MAXPACKET;
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155
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156 ses.channels[i] = newchan;
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157 ses.chancount++;
4
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158
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159 TRACE(("leave newchannel"));
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160
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161 return newchan;
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162 }
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163
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164 /* Get the channel structure corresponding to a channel number */
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165 static struct Channel* getchannel(unsigned int chan) {
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166 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
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167 return NULL;
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168 }
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169 return ses.channels[chan];
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170 }
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171
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172 /* Iterate through the channels, performing IO if available */
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173 void channelio(fd_set *readfd, fd_set *writefd) {
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174
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175 struct Channel *channel;
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176 unsigned int i;
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177
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178 /* iterate through all the possible channels */
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179 for (i = 0; i < ses.chansize; i++) {
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180
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181 channel = ses.channels[i];
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182 if (channel == NULL) {
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183 /* only process in-use channels */
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184 continue;
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185 }
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186
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187 /* read from program/pipe stdout */
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188 if (channel->outfd >= 0 && FD_ISSET(channel->outfd, readfd)) {
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189 send_msg_channel_data(channel, 0, 0);
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190 }
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191
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192 /* read from program/pipe stderr */
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193 if (channel->errfd >= 0 && FD_ISSET(channel->errfd, readfd)) {
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194 send_msg_channel_data(channel, 1, SSH_EXTENDED_DATA_STDERR);
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195 }
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196
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197 /* if we can read from the infd, it might be closed, so we try to
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198 * see if it has errors */
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199 if (channel->infd >= 0 && channel->infd != channel->outfd
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200 && FD_ISSET(channel->infd, readfd)) {
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201 int ret;
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202 ret = write(channel->infd, NULL, 0);
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203 if (ret < 0 && errno != EINTR && errno != EAGAIN) {
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204 closeinfd(channel);
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205 }
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206 }
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207
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208 /* write to program/pipe stdin */
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209 if (channel->infd >= 0 && FD_ISSET(channel->infd, writefd)) {
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210 if (channel->initconn) {
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211 checkinitdone(channel);
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212 continue; /* Important not to use the channel after
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213 checkinitdone(), as it may be NULL */
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214 } else {
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215 writechannel(channel);
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216 }
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217 }
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218
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219 /* now handle any of the channel-closing type stuff */
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220 checkclose(channel);
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221
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222 } /* foreach channel */
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223
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224 /* Listeners such as TCP, X11, agent-auth */
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225 #ifdef USING_LISTENERS
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226 handle_listeners(readfd);
4
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227 #endif
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228 }
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229
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230
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231 /* do all the EOF/close type stuff checking for a channel */
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232 static void checkclose(struct Channel *channel) {
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233
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234 if (!channel->sentclosed) {
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235
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236 /* check for exited - currently only used for server sessions,
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237 * if the shell has exited etc */
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238 if (channel->type->checkclose) {
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239 if (channel->type->checkclose(channel)) {
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240 closeinfd(channel);
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241 }
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242 }
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243
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244 if (!channel->senteof
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245 && channel->outfd == FD_CLOSED
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246 && channel->errfd == FD_CLOSED) {
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247 send_msg_channel_eof(channel);
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248 }
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249
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250 if (channel->infd == FD_CLOSED
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251 && channel->outfd == FD_CLOSED
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252 && channel->errfd == FD_CLOSED) {
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253 send_msg_channel_close(channel);
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254 }
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255 }
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256
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257 /* When either party wishes to terminate the channel, it sends
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258 * SSH_MSG_CHANNEL_CLOSE. Upon receiving this message, a party MUST
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259 * send back a SSH_MSG_CHANNEL_CLOSE unless it has already sent this
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260 * message for the channel. The channel is considered closed for a
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261 * party when it has both sent and received SSH_MSG_CHANNEL_CLOSE, and
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262 * the party may then reuse the channel number. A party MAY send
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263 * SSH_MSG_CHANNEL_CLOSE without having sent or received
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264 * SSH_MSG_CHANNEL_EOF.
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265 * (from draft-ietf-secsh-connect)
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266 */
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267 if (channel->recvclosed) {
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268 if (! channel->sentclosed) {
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269 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."));
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270 send_msg_channel_close(channel);
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271 }
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272 removechannel(channel);
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273 }
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274 }
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275
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276
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277 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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278 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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279 * it is important that the channel reference isn't used after a call to this
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280 * function */
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281 static void checkinitdone(struct Channel *channel) {
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282
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283 int val;
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284 socklen_t vallen = sizeof(val);
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285
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286 TRACE(("enter checkinitdone"));
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287
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288 if (getsockopt(channel->infd, SOL_SOCKET, SO_ERROR, &val, &vallen)
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289 || val != 0) {
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290 close(channel->infd);
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291 deletechannel(channel);
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292 TRACE(("leave checkinitdone: fail"));
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293 } else {
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294 channel->outfd = channel->infd;
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295 channel->initconn = 0;
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296 TRACE(("leave checkinitdone: success"));
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297 }
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298 }
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299
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300
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301
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302 /* Send the close message and set the channel as closed */
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303 static void send_msg_channel_close(struct Channel *channel) {
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304
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305 TRACE(("enter send_msg_channel_close"));
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306 /* XXX server */
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307 if (channel->type->closehandler) {
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308 channel->type->closehandler(channel);
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309 }
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310 #if 0
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311 if (channel->type == CHANNEL_ID_SESSION) {
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312 send_exitsignalstatus(channel);
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313
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314 closechansess(channel);
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315 }
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316 #endif
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317
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318 CHECKCLEARTOWRITE();
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319
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320 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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321 buf_putint(ses.writepayload, channel->remotechan);
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322
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323 encrypt_packet();
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324
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325 channel->senteof = 1;
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326 channel->sentclosed = 1;
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327 TRACE(("leave send_msg_channel_close"));
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328 }
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329
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330 /* call this when trans/eof channels are closed */
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331 static void send_msg_channel_eof(struct Channel *channel) {
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332
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333 TRACE(("enter send_msg_channel_eof"));
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334 CHECKCLEARTOWRITE();
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335
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336 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
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337 buf_putint(ses.writepayload, channel->remotechan);
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338
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339 encrypt_packet();
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340
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341 channel->senteof = 1;
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342
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343 TRACE(("leave send_msg_channel_eof"));
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344 }
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345
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Matt Johnston <matt@ucc.asn.au>
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346 /* Called to write data out to the server side of a channel (eg a shell or a
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347 * program.
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348 * Only called when we know we can write to a channel, writes as much as
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349 * possible */
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350 static void writechannel(struct Channel* channel) {
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351
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352 int len, maxlen;
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353 buffer *buf;
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354
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355 TRACE(("enter writechannel"));
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356
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357 buf = channel->writebuf;
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Matt Johnston <matt@ucc.asn.au>
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358 maxlen = buf->len - buf->pos;
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359
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360 len = write(channel->infd, buf_getptr(buf, maxlen), maxlen);
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361 if (len <= 0) {
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Matt Johnston <matt@ucc.asn.au>
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362 if (len < 0 && errno != EINTR) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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363 /* no more to write */
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Matt Johnston <matt@ucc.asn.au>
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364 closeinfd(channel);
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Matt Johnston <matt@ucc.asn.au>
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365 }
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366 TRACE(("leave writechannel: len <= 0"));
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367 return;
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368 }
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369
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370 if (len == maxlen) {
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371 buf_setpos(buf, 0);
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372 buf_setlen(buf, 0);
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373
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Matt Johnston <matt@ucc.asn.au>
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374 if (channel->recveof) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375 /* we're closing up */
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Matt Johnston <matt@ucc.asn.au>
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376 closeinfd(channel);
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377 return;
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parents:
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378 TRACE(("leave writechannel: recveof set"));
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379 }
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380
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Matt Johnston <matt@ucc.asn.au>
parents:
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381 /* extend the window if we're at the end*/
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 /* TODO - this is inefficient */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 send_msg_channel_window_adjust(channel, buf->size
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 - channel->recvwindow);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 channel->recvwindow = buf->size;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 } else {
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Matt Johnston <matt@ucc.asn.au>
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387 buf_incrpos(buf, len);
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Matt Johnston <matt@ucc.asn.au>
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388 }
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Matt Johnston <matt@ucc.asn.au>
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389 TRACE(("leave writechannel"));
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Matt Johnston <matt@ucc.asn.au>
parents:
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390 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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391
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 /* Set the file descriptors for the main select in session.c
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 * This avoid channels which don't have any window available, are closed, etc*/
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
394 void setchannelfds(fd_set *readfd, fd_set *writefd) {
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parents:
diff changeset
395
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 unsigned int i;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397 struct Channel * channel;
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Matt Johnston <matt@ucc.asn.au>
parents:
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398
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399 for (i = 0; i < ses.chansize; i++) {
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parents:
diff changeset
400
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401 channel = ses.channels[i];
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
402 if (channel == NULL) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403 continue;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 /* stdout and stderr */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 if (channel->transwindow > 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
409 /* stdout */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
410 if (channel->outfd >= 0) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411 /* there's space to read more from the program */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
412 FD_SET(channel->outfd, readfd);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414 /* stderr */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
415 if (channel->errfd >= 0) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
416 FD_SET(channel->errfd, readfd);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
418 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420 if (channel->infd >= 0 && channel->infd != channel->outfd) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421 FD_SET(channel->infd, readfd);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
422 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
423
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
424 /* stdin */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425 if (channel->infd >= 0 &&
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
426 (channel->writebuf->pos < channel->writebuf->len ||
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
427 channel->initconn)) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
428 /* there's space to write more to the program */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
429 FD_SET(channel->infd, writefd);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
432 } /* foreach channel */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
434 #ifdef USING_LISTENERS
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
435 set_listener_fds(readfd);
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440 /* handle the channel EOF event, by closing the channel filedescriptor. The
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 * channel isn't closed yet, it is left until the incoming (from the program
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 * etc) FD is also EOF */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 void recv_msg_channel_eof() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 TRACE(("enter recv_msg_channel_eof"));
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450 chan = buf_getint(ses.payload);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 dropbear_exit("EOF for unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
455 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
456
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457 channel->recveof = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458 if (channel->writebuf->len == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 closeinfd(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
460 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
461
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 TRACE(("leave recv_msg_channel_eof"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
464
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466 /* Handle channel closure(), respond in kind and close the channels */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467 void recv_msg_channel_close() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
471
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
472 TRACE(("enter recv_msg_channel_close"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 chan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 TRACE(("close channel = %d", chan));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
477
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
479 /* disconnect ? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
480 dropbear_exit("Close for unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
483 channel->recveof = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484 channel->recvclosed = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 if (channel->sentclosed) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 removechannel(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490 TRACE(("leave recv_msg_channel_close"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 /* Remove a channel entry, this is only executed after both sides have sent
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 * channel close */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 static void removechannel(struct Channel * channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497 TRACE(("enter removechannel"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498 TRACE(("channel index is %d", channel->index));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
499
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
500 buf_free(channel->writebuf);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
501
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
502 /* close the FDs in case they haven't been done
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 * yet (ie they were shutdown etc */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
504 close(channel->infd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505 close(channel->outfd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 if (channel->errfd >= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 close(channel->errfd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510 deletechannel(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
512 TRACE(("leave removechannel"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 /* Remove a channel entry */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 static void deletechannel(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
518 ses.channels[channel->index] = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519 m_free(channel);
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
520 ses.chancount--;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525 /* Handle channel specific requests, passing off to corresponding handlers
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527 void recv_msg_channel_request() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 TRACE(("enter recv_msg_channel_request"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534 chan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 /* disconnect ? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 if (channel->type->reqhandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545 send_msg_channel_failure(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
546 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 #if 0
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549 /* handle according to channel type */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 switch (channel->type) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552 case CHANNEL_ID_SESSION:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553 TRACE(("continue recv_msg_channel_request: session request"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554 /* XXX server */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
555 /* Here we need to do things channel-specific style. Function
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 * pointer callbacks perhaps */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 chansessionrequest(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 default:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561 send_msg_channel_failure(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 TRACE(("leave recv_msg_channel_request"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 /* Reads data from the server's program/shell/etc, and puts it in a
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 * chan is the remote channel, isextended is 0 if it is normal data, 1
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572 * if it is extended data. if it is extended, then the type is in
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 * exttype */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574 static void send_msg_channel_data(struct Channel *channel, int isextended,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 unsigned int exttype) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 buffer *buf;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579 unsigned int maxlen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 int fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582 /* TRACE(("enter send_msg_channel_data"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 TRACE(("extended = %d type = %d", isextended, exttype));*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587 assert(!channel->sentclosed);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
588
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
589 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
590 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
592 fd = channel->outfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
593 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
594 assert(fd >= 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
595
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
597 /* -(1+4+4) is SSH_MSG_CHANNEL_DATA, channel number, string length, and
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
598 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
599 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
600 ses.writepayload->size - 1 - 4 - 4 - (isextended ? 4 : 0));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601 if (maxlen == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
602 TRACE(("leave send_msg_channel_data: no window"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
603 return; /* the data will get written later */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
604 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
605
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
606 /* read the data */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
607 buf = buf_new(maxlen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
608 len = read(fd, buf_getwriteptr(buf, maxlen), maxlen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610 /* on error/eof, send eof */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 if (len == 0 || errno != EINTR) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612 closeoutfd(channel, fd);
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
613 TRACE(("leave send_msg_channel_data: read err %d", channel->index));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615 buf_free(buf);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
616 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
617 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618 buf_incrlen(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
619
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
620 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621 isextended ? SSH_MSG_CHANNEL_EXTENDED_DATA : SSH_MSG_CHANNEL_DATA);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
622 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
623
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
624 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
625 buf_putint(ses.writepayload, exttype);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
626 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
627
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628 buf_putstring(ses.writepayload, buf_getptr(buf, len), len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 buf_free(buf);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
630
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
632
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
633 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634 TRACE(("leave send_msg_channel_data"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
637
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
638 /* when we receive channel data, put it in a buffer for writing to the program/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639 * shell etc */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
640 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
642 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 unsigned int datalen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645 unsigned int pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 unsigned int maxdata;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648 TRACE(("enter recv_msg_channel_data"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650 chan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656 if (channel->recveof) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657 dropbear_exit("received data after eof");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 if (channel->infd < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 dropbear_exit("received data with bad infd");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
662 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664 datalen = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666 /* if the client is going to send us more data than we've allocated, then
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
667 * it has ignored the windowsize, so we "MAY ignore all extra data" */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
668 maxdata = channel->writebuf->size - channel->writebuf->pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
669 if (datalen > maxdata) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 TRACE(("Warning: recv_msg_channel_data: extra data past window"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
671 datalen = maxdata;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
673
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
674 /* write to the buffer - we always append to the end of the buffer */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 pos = channel->writebuf->pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676 buf_setpos(channel->writebuf, channel->writebuf->len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
677 memcpy(buf_getwriteptr(channel->writebuf, datalen),
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 buf_getptr(ses.payload, datalen), datalen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
679 buf_incrwritepos(channel->writebuf, datalen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
680 buf_setpos(channel->writebuf, pos); /* revert pos */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
681
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
682 channel->recvwindow -= datalen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
683
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
684 /* matt - this might be for later */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
685 /* if (channel->recvwindow < RECV_MINWINDOW) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
686 send_msg_channel_window_adjust(channel,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
687 RECV_MAXWINDOW - channel->recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
688 channel->recvwindow = RECV_MAXWINDOW;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
689 }*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
690
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
691 TRACE(("leave recv_msg_channel_data"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
693
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
694 /* Increment the outgoing data window for a channel - the remote end limits
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
695 * the amount of data which may be transmitted, this window is decremented
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
696 * as data is sent, and incremented upon receiving window-adjust messages */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
697 void recv_msg_channel_window_adjust() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
698
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
699 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
700 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
701 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
702
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
703 chan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
704 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
705
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
706 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
707 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
709
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
710 incr = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
711 TRACE(("received window increment %d", incr));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
712 incr = MIN(incr, MAX_TRANS_WIN_INCR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
713
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
714 channel->transwindow += incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
715 channel->transwindow = MIN(channel->transwindow, MAX_TRANS_WINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
716
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
717 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
718
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
719 /* Increment the incoming data window for a channel, and let the remote
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
720 * end know */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
721 static void send_msg_channel_window_adjust(struct Channel* channel,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
722 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
723
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
724 TRACE(("sending window adjust %d", incr));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
725 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
726
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
727 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_WINDOW_ADJUST);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
728 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
729 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
730
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
731 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
732 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
733
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
734 /* Handle a new channel request, performing any channel-type-specific setup */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
735 /* XXX server */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
736 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
738 unsigned char *type;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
739 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
740 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
741 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
742 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
743 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
744 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
745 int ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
746
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
747
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
748 TRACE(("enter recv_msg_channel_open"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
749
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
750 /* get the packet contents */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
751 type = buf_getstring(ses.payload, &typelen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
752
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
753 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754 transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
755 transwindow = MIN(transwindow, MAX_TRANS_WINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
756 transmaxpacket = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
757 transmaxpacket = MIN(transmaxpacket, MAX_TRANS_PAYLOAD_LEN);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
758
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
759 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
760 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
761 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
762 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
764 /* Get the channel type. Client and server style invokation will set up a
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
765 * different list for ses.chantypes at startup. We just iterate through
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
766 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
767 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
768 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
769 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
770 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
771 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
772 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
773 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
775 if (chantype == NULL) {
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
776 TRACE(("No matching type for '%s'", type));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
777 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
778 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
779
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
780 TRACE(("matched type '%s'", type));
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
781
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
783 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
784
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
785 if (channel == NULL) {
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
786 TRACE(("newchannel returned NULL"));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
791 ret = channel->type->inithandler(channel);
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
792 if (ret > 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
793 errtype = ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 deletechannel(channel);
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
795 TRACE(("inithandler returned failure %d", ret));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
796 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
797 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
798 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
799
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
800 #if 0
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
801 /* type specific initialisation */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
802 if (typeval == CHANNEL_ID_SESSION) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
803 newchansess(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
804 #ifndef DISABLE_LOCALTCPFWD
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805 } else if (typeval == CHANNEL_ID_TCPDIRECT) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806 if (ses.opts->nolocaltcp) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807 errtype = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 } else if (newtcpdirect(channel) == DROPBEAR_FAILURE) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
809 errtype = SSH_OPEN_CONNECT_FAILED;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
810 deletechannel(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
811 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
812 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
813 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
814 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
815 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
816
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
819 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
820 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
821
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
822 failure:
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
823 TRACE(("recv_msg_channel_open failure"));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
824 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
825
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827 m_free(type);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
828
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
829 TRACE(("leave recv_msg_channel_open"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
830 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
831
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
832 /* Send a failure message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
833 void send_msg_channel_failure(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
834
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
835 TRACE(("enter send_msg_channel_failure"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
836 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
837
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
838 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
839 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
840
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
841 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
842 TRACE(("leave send_msg_channel_failure"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
844
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
845 /* Send a success message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
846 void send_msg_channel_success(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
847
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
848 TRACE(("enter send_msg_channel_success"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
849 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
852 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 TRACE(("leave send_msg_channel_success"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
856 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
857
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
858 /* Send a channel open failure message, with a corresponding reason
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
859 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
860 static void send_msg_channel_open_failure(unsigned int remotechan,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
861 int reason, const unsigned char *text, const unsigned char *lang) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
862
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
863 TRACE(("enter send_msg_channel_open_failure"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
864 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
865
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
866 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
867 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 buf_putint(ses.writepayload, reason);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
869 buf_putstring(ses.writepayload, text, strlen((char*)text));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
870 buf_putstring(ses.writepayload, lang, strlen((char*)lang));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873 TRACE(("leave send_msg_channel_open_failure"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 /* Confirm a channel open, and let the remote end know what number we've
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 * allocated and the receive parameters */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
878 static void send_msg_channel_open_confirmation(struct Channel* channel,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882 TRACE(("enter send_msg_channel_open_confirmation"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
883 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
885 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
886 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
888 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
889 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
891 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
892 TRACE(("leave send_msg_channel_open_confirmation"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
894
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
895 #ifdef USING_LISTENERS
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 /* Create a new channel, and start the open request. This is intended
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
897 * for X11, agent, tcp forwarding, and should be filled with channel-specific
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
898 * options, with the calling function calling encrypt_packet() after
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
899 * completion. It is mandatory for the caller to encrypt_packet() if
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
900 * DROPBEAR_SUCCESS is returned */
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
901 int send_msg_channel_open_init(int fd, const struct ChanType *type) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
902
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
903 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
904
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
905 TRACE(("enter send_msg_channel_open_init()"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
906 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
907 if (!chan) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
908 TRACE(("leave send_msg_channel_open_init() - FAILED in newchannel()"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
909 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
910 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
911
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
912 /* set fd non-blocking */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
914 TRACE(("leave send_msg_channel_open_init() - FAILED in fcntl()"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
915 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
916 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 chan->infd = chan->outfd = fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
919 ses.maxfd = MAX(ses.maxfd, fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
920
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
921 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
922 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
923
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
924 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN);
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
925 buf_putstring(ses.writepayload, type->name, strlen(type->name));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
926 buf_putint(ses.writepayload, chan->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
927 buf_putint(ses.writepayload, RECV_MAXWINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928 buf_putint(ses.writepayload, RECV_MAXPACKET);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
929
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
930 TRACE(("leave send_msg_channel_open_init()"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
931 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
933
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
934 /* Confirmation that our channel open request (for forwardings) was
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
935 * successful*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
936 void recv_msg_channel_open_confirmation() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
937
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
938 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
939 struct Channel * channel;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
940 int ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
941
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
942 TRACE(("enter recv_msg_channel_open_confirmation"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
943 chan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
944
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
945 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
946 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
947 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
948 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
949
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
950 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
951 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
952 channel->transmaxpacket = buf_getint(ses.payload);
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
953
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
954 TRACE(("new chan remote %d localho %d", channel->remotechan, chan));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
955
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
956 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
957 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
958 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
959 if (ret > 0) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
960 removechannel(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
961 TRACE(("inithandler returned failure %d", ret));
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
962 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
963 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
964
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
965
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
966 TRACE(("leave recv_msg_channel_open_confirmation"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
967 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
968
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
969 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
970 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
971
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
972 unsigned int chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
973 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
974 chan = buf_getbyte(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
975
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
976 channel = getchannel(chan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
977 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
978 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
979 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
980
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
981 removechannel(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
982 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
983
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
984 /* close a stdout/stderr fd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
985 static void closeoutfd(struct Channel * channel, int fd) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
986
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
987 /* don't close it if it is the same as infd,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
988 * unless infd is already set -1 */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
989 TRACE(("enter closeoutfd"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
990 closechanfd(channel, fd, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
991 TRACE(("leave closeoutfd"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
992 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
993
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
994 /* close a stdin fd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
995 static void closeinfd(struct Channel * channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
996
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
997 TRACE(("enter closeinfd"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
998 closechanfd(channel, channel->infd, 1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
999 TRACE(("leave closeinfd"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1000 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1001
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1002 /* close a fd, how is 0 for stdout/stderr, 1 for stdin */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1003 static void closechanfd(struct Channel *channel, int fd, int how) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1004
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1005 int closein = 0, closeout = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1006
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1007 /* XXX server */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1008 if (channel->type->sepfds) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1009 shutdown(fd, how);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1010 if (how == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1011 closeout = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1012 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1013 closein = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1014 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1015 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1016 close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1017 closein = closeout = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1018 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1019
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1020 if (closeout && fd == channel->errfd) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1021 channel->errfd = FD_CLOSED;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1022 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1023 if (closeout && fd == channel->outfd) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1024 channel->outfd = FD_CLOSED;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1025 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1026 if (closein && fd == channel->infd) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1027 channel->infd = FD_CLOSED;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1028 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1029 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1030
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
1031 #endif /* USING_LISTENERS */