Mercurial > dropbear

annotate common-channel.c @ 899:115f8a3c2d5a

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- Fix dbclient with port 0 for server-allocated - Fix port forwards with a bind address of 127.0.0.1 vs "localhost" etc
author Matt Johnston <matt@ucc.asn.au>
date Tue, 18 Feb 2014 21:33:56 +0800
parents a1a97e98b0c1
children 4696755c4cac
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002-2004 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 "circbuffer.h"
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33 #include "dbutil.h"
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34 #include "channel.h"
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35 #include "ssh.h"
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36 #include "listener.h"
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37 #include "runopts.h"
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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, int fd, circbuffer *cbuf);
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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 static void send_msg_channel_eof(struct Channel *channel);
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49 static void send_msg_channel_close(struct Channel *channel);
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50 static void remove_channel(struct Channel *channel);
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51 static void check_in_progress(struct Channel *channel);
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52 static unsigned int write_pending(struct Channel * channel);
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53 static void check_close(struct Channel *channel);
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54 static void close_chan_fd(struct Channel *channel, int fd, int how);
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56 #define FD_UNINIT (-2)
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57 #define FD_CLOSED (-1)
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58
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59 #define ERRFD_IS_READ(channel) ((channel)->extrabuf == NULL)
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60 #define ERRFD_IS_WRITE(channel) (!ERRFD_IS_READ(channel))
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61
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62 /* Initialise all the channels */
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63 void chaninitialise(const struct ChanType *chantypes[]) {
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65 /* may as well create space for a single channel */
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66 ses.channels = (struct Channel**)m_malloc(sizeof(struct Channel*));
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67 ses.chansize = 1;
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68 ses.channels[0] = NULL;
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69 ses.chancount = 0;
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71 ses.chantypes = chantypes;
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72
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73 #ifdef USING_LISTENERS
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74 listeners_initialise();
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75 #endif
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77 }
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79 /* Clean up channels, freeing allocated memory */
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80 void chancleanup() {
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82 unsigned int i;
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83
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84 TRACE(("enter chancleanup"))
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85 for (i = 0; i < ses.chansize; i++) {
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86 if (ses.channels[i] != NULL) {
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87 TRACE(("channel %d closing", i))
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88 remove_channel(ses.channels[i]);
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89 }
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90 }
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91 m_free(ses.channels);
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92 TRACE(("leave chancleanup"))
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93 }
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94
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95 static void
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96 chan_initwritebuf(struct Channel *channel)
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97 {
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98 dropbear_assert(channel->writebuf->size == 0 && channel->recvwindow == 0);
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99 cbuf_free(channel->writebuf);
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100 channel->writebuf = cbuf_new(opts.recv_window);
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101 channel->recvwindow = opts.recv_window;
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102 }
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103
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104 /* Create a new channel entry, send a reply confirm or failure */
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105 /* If remotechan, transwindow and transmaxpacket are not know (for a new
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106 * outgoing connection, with them to be filled on confirmation), they should
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107 * all be set to 0 */
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108 static struct Channel* newchannel(unsigned int remotechan,
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109 const struct ChanType *type,
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110 unsigned int transwindow, unsigned int transmaxpacket) {
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111
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112 struct Channel * newchan;
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113 unsigned int i, j;
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114
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115 TRACE(("enter newchannel"))
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117 /* first see if we can use existing channels */
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118 for (i = 0; i < ses.chansize; i++) {
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119 if (ses.channels[i] == NULL) {
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120 break;
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121 }
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122 }
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123
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124 /* otherwise extend the list */
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125 if (i == ses.chansize) {
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126 if (ses.chansize >= MAX_CHANNELS) {
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127 TRACE(("leave newchannel: max chans reached"))
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128 return NULL;
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129 }
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130
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131 /* extend the channels */
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132 ses.channels = (struct Channel**)m_realloc(ses.channels,
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133 (ses.chansize+CHAN_EXTEND_SIZE)*sizeof(struct Channel*));
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134
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135 ses.chansize += CHAN_EXTEND_SIZE;
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136
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137 /* set the new channels to null */
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138 for (j = i; j < ses.chansize; j++) {
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139 ses.channels[j] = NULL;
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140 }
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142 }
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143
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144 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
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145 newchan->type = type;
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146 newchan->index = i;
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147 newchan->sent_close = newchan->recv_close = 0;
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148 newchan->sent_eof = newchan->recv_eof = 0;
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149 newchan->close_handler_done = 0;
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150
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151 newchan->remotechan = remotechan;
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152 newchan->transwindow = transwindow;
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153 newchan->transmaxpacket = transmaxpacket;
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154
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155 newchan->typedata = NULL;
253
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156 newchan->writefd = FD_UNINIT;
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157 newchan->readfd = FD_UNINIT;
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158 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
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159 newchan->initconn = 0;
243
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160 newchan->await_open = 0;
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161 newchan->flushing = 0;
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162
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163 newchan->writebuf = cbuf_new(0); /* resized later by chan_initwritebuf */
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164 newchan->recvwindow = 0;
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165
107
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166 newchan->extrabuf = NULL; /* The user code can set it up */
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167 newchan->recvdonelen = 0;
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168 newchan->recvmaxpacket = RECV_MAX_PAYLOAD_LEN;
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169
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170 ses.channels[i] = newchan;
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171 ses.chancount++;
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172
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173 TRACE(("leave newchannel"))
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174
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175 return newchan;
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176 }
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177
179
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178 /* Returns the channel structure corresponding to the channel in the current
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179 * data packet (ses.payload must be positioned appropriately).
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180 * A valid channel is always returns, it will fail fatally with an unknown
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181 * channel */
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182 static struct Channel* getchannel_msg(const char* kind) {
179
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183
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184 unsigned int chan;
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185
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186 chan = buf_getint(ses.payload);
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187 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
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188 if (kind) {
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189 dropbear_exit("%s for unknown channel %d", kind, chan);
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190 } else {
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191 dropbear_exit("Unknown channel %d", chan);
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192 }
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193 }
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194 return ses.channels[chan];
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195 }
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196
362
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197 struct Channel* getchannel() {
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198 return getchannel_msg(NULL);
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199 }
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200
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201 /* Iterate through the channels, performing IO if available */
253
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202 void channelio(fd_set *readfds, fd_set *writefds) {
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203
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204 struct Channel *channel;
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205 unsigned int i;
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206
363
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207 /* foreach channel */
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208 for (i = 0; i < ses.chansize; i++) {
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209
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210 channel = ses.channels[i];
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211 if (channel == NULL) {
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212 /* only process in-use channels */
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213 continue;
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214 }
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215
253
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216 /* read data and send it over the wire */
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217 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
416
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218 TRACE(("send normal readfd"))
363
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219 send_msg_channel_data(channel, 0);
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220 }
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221
253
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222 /* read stderr data and send it over the wire */
416
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223 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
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224 && FD_ISSET(channel->errfd, readfds)) {
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225 TRACE(("send normal errfd"))
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226 send_msg_channel_data(channel, 1);
395
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227 }
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228
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229 /* write to program/pipe stdin */
253
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230 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
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231 if (channel->initconn) {
363
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232 /* XXX should this go somewhere cleaner? */
359
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233 check_in_progress(channel);
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234 continue; /* Important not to use the channel after
359
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235 check_in_progress(), as it may be NULL */
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236 }
253
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diff changeset
237 writechannel(channel, channel->writefd, channel->writebuf);
108
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238 }
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239
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240 /* stderr for client mode */
375
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diff changeset
241 if (ERRFD_IS_WRITE(channel)
253
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parents: 243
diff changeset
242 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
108
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diff changeset
243 writechannel(channel, channel->errfd, channel->extrabuf);
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244 }
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245
363
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246 /* handle any channel closing etc */
359
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247 check_close(channel);
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248
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249 }
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250
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251 /* Listeners such as TCP, X11, agent-auth */
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diff changeset
252 #ifdef USING_LISTENERS
253
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diff changeset
253 handle_listeners(readfds);
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254 #endif
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255 }
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256
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257
363
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diff changeset
258 /* Returns true if there is data remaining to be written to stdin or
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259 * stderr of a channel's endpoint. */
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diff changeset
260 static unsigned int write_pending(struct Channel * channel) {
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261
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diff changeset
262 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
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diff changeset
263 return 1;
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diff changeset
264 } else if (channel->errfd >= 0 && channel->extrabuf &&
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diff changeset
265 cbuf_getused(channel->extrabuf) > 0) {
363
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266 return 1;
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267 }
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268 return 0;
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269 }
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270
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271
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272 /* EOF/close handling */
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diff changeset
273 static void check_close(struct Channel *channel) {
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diff changeset
274 int close_allowed = 0;
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275
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276 TRACE2(("check_close: writefd %d, readfd %d, errfd %d, sent_close %d, recv_close %d",
253
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277 channel->writefd, channel->readfd,
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278 channel->errfd, channel->sent_close, channel->recv_close))
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279 TRACE2(("writebuf size %d extrabuf size %d",
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280 channel->writebuf ? cbuf_getused(channel->writebuf) : 0,
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diff changeset
281 channel->extrabuf ? cbuf_getused(channel->extrabuf) : 0))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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282
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283 if (!channel->flushing
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284 && !channel->close_handler_done
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285 && channel->type->check_close
416
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286 && channel->type->check_close(channel))
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287 {
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288 channel->flushing = 1;
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289 }
467
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290
504
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291 /* if a type-specific check_close is defined we will only exit
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292 once that has been triggered. this is only used for a server "session"
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293 channel, to ensure that the shell has exited (and the exit status
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diff changeset
294 retrieved) before we close things up. */
467
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295 if (!channel->type->check_close
652
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296 || channel->close_handler_done
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diff changeset
297 || channel->type->check_close(channel)) {
467
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diff changeset
298 close_allowed = 1;
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299 }
416
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300
467
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diff changeset
301 if (channel->recv_close && !write_pending(channel) && close_allowed) {
416
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diff changeset
302 if (!channel->sent_close) {
165
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303 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
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304 send_msg_channel_close(channel);
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305 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
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306 remove_channel(channel);
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diff changeset
307 return;
397
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308 }
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309
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310 if ((channel->recv_eof && !write_pending(channel))
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311 /* have a server "session" and child has exited */
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312 || (channel->type->check_close && close_allowed)) {
364
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313 close_chan_fd(channel, channel->writefd, SHUT_WR);
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314 }
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315
416
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316 /* Special handling for flushing read data after an exit. We
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317 read regardless of whether the select FD was set,
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318 and if there isn't data available, the channel will get closed. */
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319 if (channel->flushing) {
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320 TRACE(("might send data, flushing"))
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321 if (channel->readfd >= 0 && channel->transwindow > 0) {
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322 TRACE(("send data readfd"))
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323 send_msg_channel_data(channel, 0);
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324 }
439
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diff changeset
325 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
416
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326 && channel->transwindow > 0) {
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327 TRACE(("send data errfd"))
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328 send_msg_channel_data(channel, 1);
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329 }
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330 }
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331
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332 /* If we're not going to send any more data, send EOF */
359
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333 if (!channel->sent_eof
365
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334 && channel->readfd == FD_CLOSED
375
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335 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)) {
397
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336 send_msg_channel_eof(channel);
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337 }
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338
375
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339 /* And if we can't receive any more data from them either, close up */
467
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340 if (channel->readfd == FD_CLOSED
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341 && channel->writefd == FD_CLOSED
423
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342 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)
467
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343 && !channel->sent_close
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344 && close_allowed
416
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345 && !write_pending(channel)) {
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346 TRACE(("sending close, readfd is closed"))
397
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347 send_msg_channel_close(channel);
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348 }
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349 }
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350
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351 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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352 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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353 * it is important that the channel reference isn't used after a call to this
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354 * function */
359
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355 static void check_in_progress(struct Channel *channel) {
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356
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357 int val;
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358 socklen_t vallen = sizeof(val);
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359
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360 TRACE(("enter check_in_progress"))
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361
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362 if (getsockopt(channel->writefd, SOL_SOCKET, SO_ERROR, &val, &vallen)
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363 || val != 0) {
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364 send_msg_channel_open_failure(channel->remotechan,
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365 SSH_OPEN_CONNECT_FAILED, "", "");
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366 close(channel->writefd);
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367 remove_channel(channel);
359
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368 TRACE(("leave check_in_progress: fail"))
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369 } else {
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370 chan_initwritebuf(channel);
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371 send_msg_channel_open_confirmation(channel, channel->recvwindow,
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372 channel->recvmaxpacket);
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373 channel->readfd = channel->writefd;
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374 channel->initconn = 0;
359
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375 TRACE(("leave check_in_progress: success"))
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376 }
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377 }
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378
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379
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380 /* Send the close message and set the channel as closed */
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381 static void send_msg_channel_close(struct Channel *channel) {
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382
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383 TRACE(("enter send_msg_channel_close %p", channel))
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384 if (channel->type->closehandler
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385 && !channel->close_handler_done) {
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386 channel->type->closehandler(channel);
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387 channel->close_handler_done = 1;
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388 }
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389
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390 CHECKCLEARTOWRITE();
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391
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392 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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393 buf_putint(ses.writepayload, channel->remotechan);
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394
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395 encrypt_packet();
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396
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397 channel->sent_eof = 1;
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398 channel->sent_close = 1;
416
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399 close_chan_fd(channel, channel->readfd, SHUT_RD);
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400 close_chan_fd(channel, channel->errfd, SHUT_RDWR);
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401 close_chan_fd(channel, channel->writefd, SHUT_WR);
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402 TRACE(("leave send_msg_channel_close"))
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403 }
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404
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405 /* call this when trans/eof channels are closed */
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406 static void send_msg_channel_eof(struct Channel *channel) {
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407
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diff changeset
408 TRACE(("enter send_msg_channel_eof"))
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409 CHECKCLEARTOWRITE();
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410
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411 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
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412 buf_putint(ses.writepayload, channel->remotechan);
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413
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414 encrypt_packet();
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415
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416 channel->sent_eof = 1;
4
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417
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418 TRACE(("leave send_msg_channel_eof"))
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419 }
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420
107
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421 /* Called to write data out to the local side of the channel.
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422 * Only called when we know we can write to a channel, writes as much as
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423 * possible */
108
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424 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf) {
4
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425
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426 int len, maxlen;
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427
375
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parents: 365
diff changeset
428 TRACE(("enter writechannel fd %d", fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
429
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
430 maxlen = cbuf_readlen(cbuf);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
432 /* Write the data out */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
433 len = write(fd, cbuf_readptr(cbuf, maxlen), maxlen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 if (len <= 0) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
435 TRACE(("errno %d len %d", errno, len))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 if (len < 0 && errno != EINTR) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
437 close_chan_fd(channel, fd, SHUT_WR);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
439 TRACE(("leave writechannel: len <= 0"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
442 TRACE(("writechannel wrote %d", len))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
443
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
444 cbuf_incrread(cbuf, len);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
445 channel->recvdonelen += len;
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
446
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
447 /* Window adjust handling */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
448 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
449 /* Set it back to max window */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
450 send_msg_channel_window_adjust(channel, channel->recvdonelen);
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
451 channel->recvwindow += channel->recvdonelen;
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
452 channel->recvdonelen = 0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 }
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
454
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
455 dropbear_assert(channel->recvwindow <= opts.recv_window);
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
456 dropbear_assert(channel->recvwindow <= cbuf_getavail(channel->writebuf));
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
457 dropbear_assert(channel->extrabuf == NULL ||
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
458 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
459
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
460 TRACE(("leave writechannel"))
4
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463 /* 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
464 * This avoid channels which don't have any window available, are closed, etc*/
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
465 void setchannelfds(fd_set *readfds, fd_set *writefds) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 for (i = 0; i < ses.chansize; i++) {
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 channel = ses.channels[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 continue;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
477 /* Stuff to put over the wire.
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
478 Avoid queueing data to send if we're in the middle of a
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
479 key re-exchange (!dataallowed), but still read from the
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
480 FD if there's the possibility of "~."" to kill an
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
481 interactive session (the read_mangler) */
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
482 if (channel->transwindow > 0
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
483 && (ses.dataallowed || channel->read_mangler)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
485 if (channel->readfd >= 0) {
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
486 FD_SET(channel->readfd, readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 }
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
488
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
489 if (ERRFD_IS_READ(channel) && channel->errfd >= 0) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
490 FD_SET(channel->errfd, readfds);
4
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
397
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
Matt Johnston <matt@ucc.asn.au>
parents: 396
diff changeset
494 /* Stuff from the wire */
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
495 if (channel->initconn
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
496 ||(channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0)) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
497 FD_SET(channel->writefd, writefds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
499
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
500 if (ERRFD_IS_WRITE(channel) && channel->errfd >= 0
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
501 && cbuf_getused(channel->extrabuf) > 0) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
502 FD_SET(channel->errfd, writefds);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
503 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
504
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505 } /* foreach channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
507 #ifdef USING_LISTENERS
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
508 set_listener_fds(readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 /* 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
514 * 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
515 * etc) FD is also EOF */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 void recv_msg_channel_eof() {
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 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
520 TRACE(("enter recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
522 channel = getchannel_msg("EOF");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
524 channel->recv_eof = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
526 check_close(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
527 TRACE(("leave recv_msg_channel_eof"))
4
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 /* Handle channel closure(), respond in kind and close the channels */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 void recv_msg_channel_close() {
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 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
536 TRACE(("enter recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
538 channel = getchannel_msg("Close");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
540 channel->recv_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
541 channel->recv_close = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
543 check_close(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
544 TRACE(("leave recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545 }
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 /* 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
548 * channel close */
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
549 static void remove_channel(struct Channel * channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
551 TRACE(("enter remove_channel"))
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
552 TRACE(("channel index is %d", channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
554 cbuf_free(channel->writebuf);
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
555 channel->writebuf = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
557 if (channel->extrabuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
558 cbuf_free(channel->extrabuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
559 channel->extrabuf = NULL;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
560 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
561
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
562
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 /* close the FDs in case they haven't been done
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
564 * yet (they might have been shutdown etc) */
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
565 TRACE(("CLOSE writefd %d", channel->writefd))
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
566 close(channel->writefd);
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
567 TRACE(("CLOSE readfd %d", channel->readfd))
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
568 close(channel->readfd);
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
569 TRACE(("CLOSE errfd %d", channel->errfd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
570 close(channel->errfd);
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
571
770
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
572 if (!channel->close_handler_done
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
573 && channel->type->closehandler) {
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
574 channel->type->closehandler(channel);
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
575 channel->close_handler_done = 1;
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
576 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
578 ses.channels[channel->index] = NULL;
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
579 m_free(channel);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
580 ses.chancount--;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
582 TRACE(("leave remove_channel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 }
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 /* 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
586 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587 void recv_msg_channel_request() {
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 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
590
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
591 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
592
652
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
593 TRACE(("enter recv_msg_channel_request %p", channel))
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
594
495
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
595 if (channel->sent_close) {
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
596 TRACE(("leave recv_msg_channel_request: already closed channel"))
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
597 return;
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
598 }
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
599
652
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
600 if (channel->type->reqhandler
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
601 && !channel->close_handler_done) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
602 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
603 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
604 send_msg_channel_failure(channel);
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
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
607 TRACE(("leave recv_msg_channel_request"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
608
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 /* 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
612 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 * 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
614 * 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
615 * exttype */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
616 static void send_msg_channel_data(struct Channel *channel, int isextended) {
4
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 int len;
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
619 size_t maxlen, size_pos;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
620 int fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
622 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
623
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
624 TRACE(("enter send_msg_channel_data"))
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
625 dropbear_assert(!channel->sent_close);
4
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 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 } else {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
630 fd = channel->readfd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
632 TRACE(("enter send_msg_channel_data isextended %d fd %d", isextended, fd))
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
633 dropbear_assert(fd >= 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636 /* -(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
637 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
638 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639 ses.writepayload->size - 1 - 4 - 4 - (isextended ? 4 : 0));
770
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
640 TRACE(("maxlen %zd", maxlen))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641 if (maxlen == 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
642 TRACE(("leave send_msg_channel_data: no window"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647 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
648 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 if (isextended) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
650 buf_putint(ses.writepayload, SSH_EXTENDED_DATA_STDERR);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
652 /* a dummy size first ...*/
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
653 size_pos = ses.writepayload->pos;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
654 buf_putint(ses.writepayload, 0);
4
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 /* read the data */
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
657 len = read(fd, buf_getwriteptr(ses.writepayload, maxlen), maxlen);
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
658
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 if (len == 0 || errno != EINTR) {
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
661 /* This will also get hit in the case of EAGAIN. The only
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
662 time we expect to receive EAGAIN is when we're flushing a FD,
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
663 in which case it can be treated the same as EOF */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
664 close_chan_fd(channel, fd, SHUT_RD);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665 }
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
666 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
667 buf_setlen(ses.writepayload, 0);
423
b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched.
Matt Johnston <matt@ucc.asn.au>
parents: 416
diff changeset
668 TRACE(("leave send_msg_channel_data: len %d read err %d or EOF for fd %d",
b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched.
Matt Johnston <matt@ucc.asn.au>
parents: 416
diff changeset
669 len, errno, fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
671 }
673
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 652
diff changeset
672
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
673 if (channel->read_mangler) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
674 channel->read_mangler(channel, buf_getwriteptr(ses.writepayload, len), &len);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
675 if (len == 0) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
676 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
677 buf_setlen(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
678 return;
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
679 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
680 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
681
673
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 652
diff changeset
682 TRACE(("send_msg_channel_data: len %d fd %d", len, fd))
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
683 buf_incrwritepos(ses.writepayload, len);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
684 /* ... real size here */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
685 buf_setpos(ses.writepayload, size_pos);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
686 buf_putint(ses.writepayload, len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
687
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
688 channel->transwindow -= len;
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 encrypt_packet();
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
691
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
692 /* If we receive less data than we requested when flushing, we've
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
693 reached the equivalent of EOF */
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
694 if (channel->flushing && len < (ssize_t)maxlen)
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
695 {
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
696 TRACE(("closing from channel, flushing out."))
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
697 close_chan_fd(channel, fd, SHUT_RD);
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
698 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
699 TRACE(("leave send_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
700 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
701
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
702 /* We receive channel data */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
703 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
704
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
705 struct Channel *channel;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
706
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
707 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
709 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
710 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
711
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
712 /* Shared for data and stderr data - when we receive data, put it in a buffer
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
713 * for writing to the local file descriptor */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
714 void common_recv_msg_channel_data(struct Channel *channel, int fd,
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
715 circbuffer * cbuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
716
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
717 unsigned int datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
718 unsigned int maxdata;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
719 unsigned int buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
720 unsigned int len;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
721
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
722 TRACE(("enter recv_msg_channel_data"))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
723
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
724 if (channel->recv_eof) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
725 dropbear_exit("Received data after eof");
4
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
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
728 if (fd < 0 || !cbuf) {
365
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
729 /* If we have encountered failed write, the far side might still
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
730 * be sending data without having yet received our close notification.
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
731 * We just drop the data. */
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
732 return;
4
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
735 datalen = buf_getint(ses.payload);
365
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
736 TRACE(("length %d", datalen))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
737
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
738 maxdata = cbuf_getavail(cbuf);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
739
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
740 /* Whilst the spec says we "MAY ignore data past the end" this could
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
741 * lead to corrupted file transfers etc (chunks missed etc). It's better to
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
742 * just die horribly */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
743 if (datalen > maxdata) {
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
744 dropbear_exit("Oversized packet");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
745 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
746
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
747 /* We may have to run throught twice, if the buffer wraps around. Can't
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
748 * just "leave it for next time" like with writechannel, since this
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
749 * is payload data */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
750 len = datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
751 while (len > 0) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
752 buflen = cbuf_writelen(cbuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
753 buflen = MIN(buflen, len);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
754
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
755 memcpy(cbuf_writeptr(cbuf, buflen),
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
756 buf_getptr(ses.payload, buflen), buflen);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
757 cbuf_incrwrite(cbuf, buflen);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
758 buf_incrpos(ses.payload, buflen);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
759 len -= buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
760 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
761
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
762 dropbear_assert(channel->recvwindow >= datalen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763 channel->recvwindow -= datalen;
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
764 dropbear_assert(channel->recvwindow <= opts.recv_window);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
765
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
766 TRACE(("leave recv_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769 /* 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
770 * 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
771 * 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
772 void recv_msg_channel_window_adjust() {
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 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
775 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
777 channel = getchannel();
4
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 incr = buf_getint(ses.payload);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
780 TRACE(("received window increment %d", incr))
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
781 incr = MIN(incr, TRANS_MAX_WIN_INCR);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
783 channel->transwindow += incr;
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
784 channel->transwindow = MIN(channel->transwindow, TRANS_MAX_WINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
785
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
786 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 /* 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
789 * end know */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790 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
791 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
793 TRACE(("sending window adjust %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
795
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
796 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
797 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
798 buf_putint(ses.writepayload, incr);
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 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
801 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
802
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
803 /* 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
804 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806 unsigned char *type;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
809 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
810 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
811 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
812 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
813 int ret;
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
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
816 TRACE(("enter recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818 /* get the packet contents */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
819 type = buf_getstring(ses.payload, &typelen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
820
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
821 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
822 transwindow = buf_getint(ses.payload);
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
823 transwindow = MIN(transwindow, TRANS_MAX_WINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
824 transmaxpacket = buf_getint(ses.payload);
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
825 transmaxpacket = MIN(transmaxpacket, TRANS_MAX_PAYLOAD_LEN);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
828 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
829 goto failure;
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
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
832 /* 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
833 * 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
834 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
835 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
836 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
837 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
838 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
839 break;
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 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
842
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843 if (chantype == NULL) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
844 TRACE(("No matching type for '%s'", type))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
845 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
846 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
847
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
848 TRACE(("matched type '%s'", type))
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
849
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
852
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853 if (channel == NULL) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
854 TRACE(("newchannel returned NULL"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 goto failure;
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 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
859 ret = channel->type->inithandler(channel);
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
860 if (ret == SSH_OPEN_IN_PROGRESS) {
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
861 /* We'll send the confirmation later */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
862 goto cleanup;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
863 }
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
864 if (ret > 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
865 errtype = ret;
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
866 remove_channel(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
867 TRACE(("inithandler returned failure %d", ret))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
869 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
870 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
872 chan_initwritebuf(channel);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
873
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
878
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879 failure:
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
880 TRACE(("recv_msg_channel_open failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
883 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884 m_free(type);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
885
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
886 TRACE(("leave recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
888
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
889 /* Send a failure message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890 void send_msg_channel_failure(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
891
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
892 TRACE(("enter send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
894
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
895 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
897
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
898 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
899 TRACE(("leave send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
900 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
901
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
902 /* Send a success message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
903 void send_msg_channel_success(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
904
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
905 TRACE(("enter send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
906 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
907
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
908 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
909 buf_putint(ses.writepayload, channel->remotechan);
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 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
912 TRACE(("leave send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
914
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
915 /* 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
916 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917 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
918 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
919
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
920 TRACE(("enter send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
921 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
922
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
923 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
924 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
925 buf_putint(ses.writepayload, reason);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
926 buf_putstring(ses.writepayload, text, strlen((char*)text));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
927 buf_putstring(ses.writepayload, lang, strlen((char*)lang));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
929 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
930 TRACE(("leave send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
931 }
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 /* 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
934 * allocated and the receive parameters */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
935 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
936 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
937 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
938
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
939 TRACE(("enter send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
940 CHECKCLEARTOWRITE();
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 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
943 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
944 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
945 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
946 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
947
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
948 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
949 TRACE(("leave send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
950 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
951
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
952 /* close a fd, how is SHUT_RD or SHUT_WR */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
953 static void close_chan_fd(struct Channel *channel, int fd, int how) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
954
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
955 int closein = 0, closeout = 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
956
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
957 if (channel->type->sepfds) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
958 TRACE(("SHUTDOWN(%d, %d)", fd, how))
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
959 shutdown(fd, how);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
960 if (how == 0) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
961 closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
962 } else {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
963 closein = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
964 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
965 } else {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
966 TRACE(("CLOSE some fd %d", fd))
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
967 close(fd);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
968 closein = closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
969 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
970
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
971 if (closeout && (fd == channel->readfd)) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
972 channel->readfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
973 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
974 if (closeout && ERRFD_IS_READ(channel) && (fd == channel->errfd)) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
975 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
976 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
977
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
978 if (closein && fd == channel->writefd) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
979 channel->writefd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
980 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
981 if (closein && ERRFD_IS_WRITE(channel) && (fd == channel->errfd)) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
982 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
983 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
984
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
985 /* if we called shutdown on it and all references are gone, then we
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
986 * need to close() it to stop it lingering */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
987 if (channel->type->sepfds && channel->readfd == FD_CLOSED
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
988 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
989 TRACE(("CLOSE (finally) of %d", fd))
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
990 close(fd);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
991 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
992 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
993
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
994
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
995 #if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
996 /* 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
997 * 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
998 * 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
999 * 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
1000 * DROPBEAR_SUCCESS is returned */
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
1001 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
1002
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1003 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1004
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
1005 TRACE(("enter send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1006 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1007 if (!chan) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
1008 TRACE(("leave send_msg_channel_open_init() - FAILED in newchannel()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1009 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1010 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1011
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1012 /* Outbound opened channels don't make use of in-progress connections,
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1013 * we can set it up straight away */
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1014 chan_initwritebuf(chan);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1015
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1016 /* set fd non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
1017 setnonblocking(fd);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1018
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1019 chan->writefd = chan->readfd = fd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1020 ses.maxfd = MAX(ses.maxfd, fd);
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1021
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1022 chan->await_open = 1;
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1023
4
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1024 /* now open the channel connection */
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1025 CHECKCLEARTOWRITE();
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1026
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1027 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN);
9
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1028 buf_putstring(ses.writepayload, type->name, strlen(type->name));
4
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1029 buf_putint(ses.writepayload, chan->index);
449
3e6c536bc023 Add -W <windowsize> argument and document it.
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1030 buf_putint(ses.writepayload, opts.recv_window);
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
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1031 buf_putint(ses.writepayload, RECV_MAX_PAYLOAD_LEN);
4
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1032
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1033 TRACE(("leave send_msg_channel_open_init()"))
4
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1034 return DROPBEAR_SUCCESS;
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1035 }
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1036
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1037 /* Confirmation that our channel open request (for forwardings) was
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1038 * successful*/
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1039 void recv_msg_channel_open_confirmation() {
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1040
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1041 struct Channel * channel;
37
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1042 int ret;
4
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1043
165
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1044 TRACE(("enter recv_msg_channel_open_confirmation"))
4
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1045
179
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1046 channel = getchannel();
4
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1047
243
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1048 if (!channel->await_open) {
594
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diff changeset
1049 dropbear_exit("Unexpected channel reply");
243
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1050 }
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1051 channel->await_open = 0;
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diff changeset
1052
4
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1053 channel->remotechan = buf_getint(ses.payload);
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1054 channel->transwindow = buf_getint(ses.payload);
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1055 channel->transmaxpacket = buf_getint(ses.payload);
13
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diff changeset
1056
187
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diff changeset
1057 TRACE(("new chan remote %d local %d",
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diff changeset
1058 channel->remotechan, channel->index))
4
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1059
37
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diff changeset
1060 /* Run the inithandler callback */
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diff changeset
1061 if (channel->type->inithandler) {
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diff changeset
1062 ret = channel->type->inithandler(channel);
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1063 if (ret > 0) {
359
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1064 remove_channel(channel);
165
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diff changeset
1065 TRACE(("inithandler returned failure %d", ret))
37
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1066 }
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1067 }
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diff changeset
1068
13
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diff changeset
1069
165
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1070 TRACE(("leave recv_msg_channel_open_confirmation"))
4
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1071 }
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1072
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1073 /* Notification that our channel open request failed */
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1074 void recv_msg_channel_open_failure() {
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1075
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1076 struct Channel * channel;
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1077
179
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1078 channel = getchannel();
4
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1079
243
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1080 if (!channel->await_open) {
594
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diff changeset
1081 dropbear_exit("Unexpected channel reply");
243
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diff changeset
1082 }
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1083 channel->await_open = 0;
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1084
359
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1085 remove_channel(channel);
4
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1086 }
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
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1087 #endif /* USING_LISTENERS */