Mercurial > dropbear

annotate common-channel.c @ 429:ce14fab86732 channel-fix

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propagate from branch 'au.asn.ucc.matt.dropbear' (head 6cb7793493d92968e09b5dea21d71ded5811d21f) to branch 'au.asn.ucc.matt.dropbear.channel-fix' (head 275bf5c6b71ca286c29733b9e38bac40eeb06a40)
author Matt Johnston <matt@ucc.asn.au>
date Mon, 12 Feb 2007 13:38:18 +0000
parents b2b67cfcd66e
children c216212001fc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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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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38 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
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39 const unsigned char *text, const unsigned char *lang);
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40 static void send_msg_channel_open_confirmation(struct Channel* channel,
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41 unsigned int recvwindow,
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42 unsigned int recvmaxpacket);
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43 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf);
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44 static void send_msg_channel_window_adjust(struct Channel *channel,
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45 unsigned int incr);
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46 static void send_msg_channel_data(struct Channel *channel, int isextended);
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47 static void send_msg_channel_eof(struct Channel *channel);
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48 static void send_msg_channel_close(struct Channel *channel);
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49 static void remove_channel(struct Channel *channel);
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50 static void delete_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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81
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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 /* Create a new channel entry, send a reply confirm or failure */
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96 /* If remotechan, transwindow and transmaxpacket are not know (for a new
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97 * outgoing connection, with them to be filled on confirmation), they should
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98 * all be set to 0 */
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99 struct Channel* newchannel(unsigned int remotechan,
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100 const struct ChanType *type,
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101 unsigned int transwindow, unsigned int transmaxpacket) {
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102
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103 struct Channel * newchan;
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104 unsigned int i, j;
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105
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106 TRACE(("enter newchannel"))
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108 /* first see if we can use existing channels */
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109 for (i = 0; i < ses.chansize; i++) {
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110 if (ses.channels[i] == NULL) {
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111 break;
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112 }
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113 }
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115 /* otherwise extend the list */
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116 if (i == ses.chansize) {
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117 if (ses.chansize >= MAX_CHANNELS) {
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118 TRACE(("leave newchannel: max chans reached"))
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119 return NULL;
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120 }
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121
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122 /* extend the channels */
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123 ses.channels = (struct Channel**)m_realloc(ses.channels,
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124 (ses.chansize+CHAN_EXTEND_SIZE)*sizeof(struct Channel*));
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125
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126 ses.chansize += CHAN_EXTEND_SIZE;
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127
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128 /* set the new channels to null */
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129 for (j = i; j < ses.chansize; j++) {
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130 ses.channels[j] = NULL;
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131 }
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132
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133 }
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134
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135 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
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136 newchan->type = type;
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137 newchan->index = i;
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138 newchan->sent_close = newchan->recv_close = 0;
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139 newchan->sent_eof = newchan->recv_eof = 0;
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140
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141 newchan->remotechan = remotechan;
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142 newchan->transwindow = transwindow;
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143 newchan->transmaxpacket = transmaxpacket;
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144
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145 newchan->typedata = NULL;
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146 newchan->writefd = FD_UNINIT;
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147 newchan->readfd = FD_UNINIT;
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148 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
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149 newchan->initconn = 0;
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150 newchan->await_open = 0;
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151 newchan->flushing = 0;
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152
107
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153 newchan->writebuf = cbuf_new(RECV_MAXWINDOW);
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154 newchan->extrabuf = NULL; /* The user code can set it up */
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155 newchan->recvwindow = RECV_MAXWINDOW;
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156 newchan->recvdonelen = 0;
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157 newchan->recvmaxpacket = RECV_MAXPACKET;
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158
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159 ses.channels[i] = newchan;
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160 ses.chancount++;
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161
165
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162 TRACE(("leave newchannel"))
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163
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164 return newchan;
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165 }
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166
179
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167 /* Returns the channel structure corresponding to the channel in the current
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168 * data packet (ses.payload must be positioned appropriately).
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169 * A valid channel is always returns, it will fail fatally with an unknown
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170 * channel */
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171 static struct Channel* getchannel_msg(const char* kind) {
179
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172
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173 unsigned int chan;
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174
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175 chan = buf_getint(ses.payload);
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176 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
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177 if (kind) {
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178 dropbear_exit("%s for unknown channel %d", kind, chan);
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179 } else {
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180 dropbear_exit("Unknown channel %d", chan);
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181 }
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182 }
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183 return ses.channels[chan];
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184 }
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185
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186 struct Channel* getchannel() {
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187 return getchannel_msg(NULL);
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188 }
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189
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190 /* Iterate through the channels, performing IO if available */
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191 void channelio(fd_set *readfds, fd_set *writefds) {
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192
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193 struct Channel *channel;
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194 unsigned int i;
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195
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196 /* foreach channel */
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197 for (i = 0; i < ses.chansize; i++) {
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198
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199 channel = ses.channels[i];
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200 if (channel == NULL) {
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201 /* only process in-use channels */
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202 continue;
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203 }
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204
253
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205 /* read data and send it over the wire */
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206 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
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207 TRACE(("send normal readfd"))
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208 send_msg_channel_data(channel, 0);
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209 }
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210
253
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211 /* read stderr data and send it over the wire */
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212 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
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213 && FD_ISSET(channel->errfd, readfds)) {
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214 TRACE(("send normal errfd"))
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215 send_msg_channel_data(channel, 1);
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216 }
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217
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218 /* write to program/pipe stdin */
253
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219 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
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220 if (channel->initconn) {
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221 /* XXX should this go somewhere cleaner? */
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222 check_in_progress(channel);
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223 continue; /* Important not to use the channel after
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224 check_in_progress(), as it may be NULL */
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225 }
253
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226 writechannel(channel, channel->writefd, channel->writebuf);
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227 }
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228
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229 /* stderr for client mode */
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230 if (ERRFD_IS_WRITE(channel)
253
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231 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
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232 writechannel(channel, channel->errfd, channel->extrabuf);
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233 }
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234
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235 /* handle any channel closing etc */
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236 check_close(channel);
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237
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238 }
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239
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240 /* Listeners such as TCP, X11, agent-auth */
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241 #ifdef USING_LISTENERS
253
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242 handle_listeners(readfds);
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243 #endif
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244 }
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245
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246
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247 /* Returns true if there is data remaining to be written to stdin or
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248 * stderr of a channel's endpoint. */
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249 static unsigned int write_pending(struct Channel * channel) {
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250
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251 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
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252 return 1;
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253 } else if (channel->errfd >= 0 && channel->extrabuf &&
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254 cbuf_getused(channel->extrabuf) > 0) {
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255 return 1;
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256 }
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257 return 0;
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258 }
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259
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260
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261 /* EOF/close handling */
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262 static void check_close(struct Channel *channel) {
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263
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264 TRACE(("check_close: writefd %d, readfd %d, errfd %d, sent_close %d, recv_close %d",
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265 channel->writefd, channel->readfd,
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266 channel->errfd, channel->sent_close, channel->recv_close))
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267 TRACE(("writebuf size %d extrabuf size %d",
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268 cbuf_getused(channel->writebuf),
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269 channel->extrabuf ? cbuf_getused(channel->extrabuf) : 0))
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270
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271 if (!channel->flushing && channel->type->check_close
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272 && channel->type->check_close(channel))
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273 {
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274 channel->flushing = 1;
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275 }
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276
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277 if (channel->recv_close && !write_pending(channel)) {
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278 if (!channel->sent_close) {
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279 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
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280 send_msg_channel_close(channel);
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281 }
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282 remove_channel(channel);
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283 return;
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284 }
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285
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286 if (channel->recv_eof && !write_pending(channel)) {
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287 close_chan_fd(channel, channel->writefd, SHUT_WR);
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288 }
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289
416
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290 /* Special handling for flushing read data after an exit. We
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291 read regardless of whether the select FD was set,
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292 and if there isn't data available, the channel will get closed. */
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293 if (channel->flushing) {
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294 TRACE(("might send data, flushing"))
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295 if (channel->readfd >= 0 && channel->transwindow > 0) {
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296 TRACE(("send data readfd"))
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297 send_msg_channel_data(channel, 0);
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298 }
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299 if (ERRFD_IS_READ(channel) && channel->readfd >= 0
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300 && channel->transwindow > 0) {
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301 TRACE(("send data errfd"))
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302 send_msg_channel_data(channel, 1);
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303 }
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304 }
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305
375
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306 /* If we're not going to send any more data, send EOF */
359
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307 if (!channel->sent_eof
365
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308 && channel->readfd == FD_CLOSED
375
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309 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)) {
397
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310 send_msg_channel_eof(channel);
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311 }
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312
375
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313 /* And if we can't receive any more data from them either, close up */
365
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314 if (!channel->sent_close
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315 && channel->readfd == FD_CLOSED
423
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316 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)
416
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317 && !write_pending(channel)) {
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318 TRACE(("sending close, readfd is closed"))
397
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319 send_msg_channel_close(channel);
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320 }
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321 }
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322
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323 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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324 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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325 * it is important that the channel reference isn't used after a call to this
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326 * function */
359
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327 static void check_in_progress(struct Channel *channel) {
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328
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329 int val;
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330 socklen_t vallen = sizeof(val);
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331
359
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332 TRACE(("enter check_in_progress"))
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333
253
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334 if (getsockopt(channel->writefd, SOL_SOCKET, SO_ERROR, &val, &vallen)
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335 || val != 0) {
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336 send_msg_channel_open_failure(channel->remotechan,
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337 SSH_OPEN_CONNECT_FAILED, "", "");
253
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338 close(channel->writefd);
359
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339 delete_channel(channel);
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340 TRACE(("leave check_in_progress: fail"))
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341 } else {
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342 send_msg_channel_open_confirmation(channel, channel->recvwindow,
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343 channel->recvmaxpacket);
253
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344 channel->readfd = channel->writefd;
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345 channel->initconn = 0;
359
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346 TRACE(("leave check_in_progress: success"))
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347 }
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348 }
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349
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350
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351 /* Send the close message and set the channel as closed */
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352 static void send_msg_channel_close(struct Channel *channel) {
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353
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354 TRACE(("enter send_msg_channel_close"))
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355 if (channel->type->closehandler) {
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356 channel->type->closehandler(channel);
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357 }
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358
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359 CHECKCLEARTOWRITE();
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360
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361 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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362 buf_putint(ses.writepayload, channel->remotechan);
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363
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364 encrypt_packet();
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365
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366 channel->sent_eof = 1;
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367 channel->sent_close = 1;
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368 close_chan_fd(channel, channel->readfd, SHUT_RD);
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369 close_chan_fd(channel, channel->errfd, SHUT_RDWR);
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370 close_chan_fd(channel, channel->writefd, SHUT_WR);
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371 TRACE(("leave send_msg_channel_close"))
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372 }
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373
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374 /* call this when trans/eof channels are closed */
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375 static void send_msg_channel_eof(struct Channel *channel) {
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376
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diff changeset
377 TRACE(("enter send_msg_channel_eof"))
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378 CHECKCLEARTOWRITE();
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379
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380 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
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381 buf_putint(ses.writepayload, channel->remotechan);
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382
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383 encrypt_packet();
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384
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385 channel->sent_eof = 1;
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386
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387 TRACE(("leave send_msg_channel_eof"))
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388 }
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389
107
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diff changeset
390 /* Called to write data out to the local side of the channel.
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391 * Only called when we know we can write to a channel, writes as much as
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392 * possible */
108
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393 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf) {
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394
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395 int len, maxlen;
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396
375
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diff changeset
397 TRACE(("enter writechannel fd %d", fd))
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398
107
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399 maxlen = cbuf_readlen(cbuf);
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400
107
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401 /* Write the data out */
108
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402 len = write(fd, cbuf_readptr(cbuf, maxlen), maxlen);
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403 if (len <= 0) {
375
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404 TRACE(("errno %d len %d", errno, len))
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405 if (len < 0 && errno != EINTR) {
363
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406 close_chan_fd(channel, fd, SHUT_WR);
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407 }
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408 TRACE(("leave writechannel: len <= 0"))
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409 return;
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410 }
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diff changeset
411 TRACE(("writechannel wrote %d", len))
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412
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413 cbuf_incrread(cbuf, len);
108
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diff changeset
414 channel->recvdonelen += len;
107
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diff changeset
415
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diff changeset
416 /* Window adjust handling */
108
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diff changeset
417 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
107
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diff changeset
418 /* Set it back to max window */
108
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419 send_msg_channel_window_adjust(channel, channel->recvdonelen);
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420 channel->recvwindow += channel->recvdonelen;
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421 channel->recvdonelen = 0;
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422 }
108
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423
241
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424 dropbear_assert(channel->recvwindow <= RECV_MAXWINDOW);
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425 dropbear_assert(channel->recvwindow <= cbuf_getavail(channel->writebuf));
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426 dropbear_assert(channel->extrabuf == NULL ||
108
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diff changeset
427 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107
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428
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429 TRACE(("leave writechannel"))
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430 }
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431
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432 /* Set the file descriptors for the main select in session.c
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433 * This avoid channels which don't have any window available, are closed, etc*/
253
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434 void setchannelfds(fd_set *readfds, fd_set *writefds) {
4
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435
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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438
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 for (i = 0; i < ses.chansize; i++) {
fe6bca95afa7 Makefile.in contains updated files required
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440
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diff changeset
441 channel = ses.channels[i];
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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diff changeset
443 continue;
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parents:
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444 }
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445
107
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diff changeset
446 /* Stuff to put over the wire */
4
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447 if (channel->transwindow > 0) {
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448
253
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449 if (channel->readfd >= 0) {
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diff changeset
450 FD_SET(channel->readfd, readfds);
4
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451 }
107
Matt Johnston <matt@ucc.asn.au>
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diff changeset
452
375
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diff changeset
453 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
454 FD_SET(channel->errfd, readfds);
4
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Matt Johnston <matt@ucc.asn.au>
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455 }
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parents:
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456 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457
397
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
Matt Johnston <matt@ucc.asn.au>
parents: 396
diff changeset
458 /* Stuff from the wire */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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parents: 243
diff changeset
459 if ((channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0 )
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
460 || channel->initconn) {
253
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diff changeset
461 FD_SET(channel->writefd, writefds);
4
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462 }
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463
375
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Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
464 if (ERRFD_IS_WRITE(channel) != NULL && channel->errfd >= 0
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
465 && cbuf_getused(channel->extrabuf) > 0 ) {
253
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parents: 243
diff changeset
466 FD_SET(channel->errfd, writefds);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
467 }
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468
4
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Matt Johnston <matt@ucc.asn.au>
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469 } /* foreach channel */
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470
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
471 #ifdef USING_LISTENERS
253
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diff changeset
472 set_listener_fds(readfds);
4
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473 #endif
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Matt Johnston <matt@ucc.asn.au>
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474
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parents:
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475 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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476
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parents:
diff changeset
477 /* handle the channel EOF event, by closing the channel filedescriptor. The
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Matt Johnston <matt@ucc.asn.au>
parents:
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478 * channel isn't closed yet, it is left until the incoming (from the program
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
479 * etc) FD is also EOF */
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parents:
diff changeset
480 void recv_msg_channel_eof() {
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parents:
diff changeset
481
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 struct Channel * channel;
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Matt Johnston <matt@ucc.asn.au>
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483
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
484 TRACE(("enter recv_msg_channel_eof"))
4
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parents:
diff changeset
485
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
486 channel = getchannel_msg("EOF");
4
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487
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diff changeset
488 channel->recv_eof = 1;
4
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diff changeset
489
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
490 check_close(channel);
165
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Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
491 TRACE(("leave recv_msg_channel_eof"))
4
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parents:
diff changeset
492 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 /* 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
496 void recv_msg_channel_close() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498 struct Channel * channel;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
499
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
500 TRACE(("enter recv_msg_channel_close"))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
501
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
502 channel = getchannel_msg("Close");
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503
359
78518751cb82 just shuffle some variables names about, a brief comment
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parents: 332
diff changeset
504 channel->recv_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
505 channel->recv_close = 1;
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
507 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
508 TRACE(("leave recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511 /* 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
512 * channel close */
359
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Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
513 static void remove_channel(struct Channel * channel) {
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
515 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
516 TRACE(("channel index is %d", channel->index))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
518 cbuf_free(channel->writebuf);
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
519 channel->writebuf = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
520
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
521 if (channel->extrabuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
522 cbuf_free(channel->extrabuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
523 channel->extrabuf = NULL;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
524 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
525
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
526
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527 /* 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
528 * yet (they might have been shutdown etc) */
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
529 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
530 close(channel->writefd);
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
531 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
532 close(channel->readfd);
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
533 TRACE(("CLOSE errfd %d", channel->errfd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
534 close(channel->errfd);
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
535
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
536 channel->typedata = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
538 delete_channel(channel);
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 TRACE(("leave remove_channel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 /* Remove a channel entry */
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
544 static void delete_channel(struct Channel *channel) {
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 ses.channels[channel->index] = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547 m_free(channel);
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
548 ses.chancount--;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553 /* 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
554 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
555 void recv_msg_channel_request() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558
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
559 TRACE(("enter recv_msg_channel_request"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
561 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 if (channel->type->reqhandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566 send_msg_channel_failure(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568
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
569 TRACE(("leave recv_msg_channel_request"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 /* 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
574 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 * 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
576 * 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
577 * exttype */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
578 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
579
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 int len;
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
581 size_t maxlen, size_pos;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582 int fd;
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 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
586 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
587 dropbear_assert(!channel->sent_close);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
588
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
589 if (isextended) {
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parents:
diff changeset
590 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591 } else {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
592 fd = channel->readfd;
4
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parents:
diff changeset
593 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
594 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
595 dropbear_assert(fd >= 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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diff changeset
597 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
598 /* -(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
599 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
600 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601 ses.writepayload->size - 1 - 4 - 4 - (isextended ? 4 : 0));
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
602 TRACE(("maxlen %d", maxlen))
4
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parents:
diff changeset
603 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
604 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
605 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
606 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
607
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
608 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609 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
610 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 if (isextended) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
612 buf_putint(ses.writepayload, SSH_EXTENDED_DATA_STDERR);
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
613 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
614 /* 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
615 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
616 buf_putint(ses.writepayload, 0);
4
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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 /* 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
619 len = read(fd, buf_getwriteptr(ses.writepayload, maxlen), maxlen);
4
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diff changeset
620 if (len <= 0) {
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parents:
diff changeset
621 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
622 /* 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
623 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
624 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
625 close_chan_fd(channel, fd, SHUT_RD);
4
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parents:
diff changeset
626 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
627 ses.writepayload->len = ses.writepayload->pos = 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
628 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
629 len, errno, fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
630 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
632 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
633 /* ... real size here */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
634 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
635 buf_putint(ses.writepayload, len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
637 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
638
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639 encrypt_packet();
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
640
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
641 /* 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
642 reached the equivalent of EOF */
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
643 if (channel->flushing && len < maxlen)
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
644 {
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
645 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
646 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
647 }
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
648 TRACE(("leave send_msg_channel_data"))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
651 /* We receive channel data */
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 void recv_msg_channel_data() {
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parents:
diff changeset
653
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
654 struct Channel *channel;
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
656 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
658 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
659 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
660
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
661 /* 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
662 * for writing to the local file descriptor */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
663 void common_recv_msg_channel_data(struct Channel *channel, int fd,
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
664 circbuffer * cbuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
665
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
666 unsigned int datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
667 unsigned int maxdata;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
668 unsigned int buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
669 unsigned int len;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
670
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
671 TRACE(("enter recv_msg_channel_data"))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
672
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
673 if (channel->recv_eof) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
674 dropbear_exit("received data after eof");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
677 if (fd < 0) {
365
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
678 /* 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
679 * 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
680 * 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
681 return;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
682 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
683
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
684 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
685 TRACE(("length %d", datalen))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
686
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
687 maxdata = cbuf_getavail(cbuf);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
688
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
689 /* 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
690 * 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
691 * just die horribly */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692 if (datalen > maxdata) {
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
693 dropbear_exit("Oversized packet");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
694 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
695
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
696 /* We may have to run throught twice, if the buffer wraps around. Can't
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
697 * just "leave it for next time" like with writechannel, since this
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
698 * is payload data */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
699 len = datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
700 while (len > 0) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
701 buflen = cbuf_writelen(cbuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
702 buflen = MIN(buflen, len);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
703
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
704 memcpy(cbuf_writeptr(cbuf, buflen),
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
705 buf_getptr(ses.payload, buflen), buflen);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
706 cbuf_incrwrite(cbuf, buflen);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
707 buf_incrpos(ses.payload, buflen);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
708 len -= buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
709 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
710
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
711 dropbear_assert(channel->recvwindow >= datalen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
712 channel->recvwindow -= datalen;
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
713 dropbear_assert(channel->recvwindow <= RECV_MAXWINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
714
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
715 TRACE(("leave recv_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
716 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
717
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
718 /* 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
719 * 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
720 * 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
721 void recv_msg_channel_window_adjust() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
722
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
723 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
724 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
725
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
726 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
727
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
728 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
729 TRACE(("received window increment %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
730 incr = MIN(incr, MAX_TRANS_WIN_INCR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
731
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
732 channel->transwindow += incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
733 channel->transwindow = MIN(channel->transwindow, MAX_TRANS_WINDOW);
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 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
736
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737 /* 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
738 * end know */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
739 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
740 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
741
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
742 TRACE(("sending window adjust %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
743 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
744
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
745 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
746 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
747 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
748
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
749 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
750 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
751
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
752 /* 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
753 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
755 unsigned char *type;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
756 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
757 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
758 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
759 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
760 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
761 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
762 int ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
764
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
765 TRACE(("enter recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
766
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767 /* get the packet contents */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768 type = buf_getstring(ses.payload, &typelen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
770 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
771 transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
772 transwindow = MIN(transwindow, MAX_TRANS_WINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
773 transmaxpacket = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774 transmaxpacket = MIN(transmaxpacket, MAX_TRANS_PAYLOAD_LEN);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
775
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
777 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
778 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
779 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
780
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
781 /* 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
782 * 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
783 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
784 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
785 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
786 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
791
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792 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
793 TRACE(("No matching type for '%s'", type))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 goto failure;
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
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
797 TRACE(("matched type '%s'", type))
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
798
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
799 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
800 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
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 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
803 TRACE(("newchannel returned NULL"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
804 goto failure;
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 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
809 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
810 /* 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
811 goto cleanup;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
812 }
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
813 if (ret > 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
814 errtype = ret;
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
815 delete_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
816 TRACE(("inithandler returned failure %d", ret))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
819 }
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 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
822 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
823 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
824 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
825
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826 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
827 TRACE(("recv_msg_channel_open failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
828 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
829
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
830 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
831 m_free(type);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
832
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
833 TRACE(("leave recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
834 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
835
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
836 /* Send a failure message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
837 void send_msg_channel_failure(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
838
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
839 TRACE(("enter send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
840 CHECKCLEARTOWRITE();
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 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
844
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
845 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
846 TRACE(("leave send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
847 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
848
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
849 /* Send a success message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850 void send_msg_channel_success(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851
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
852 TRACE(("enter send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
856 buf_putint(ses.writepayload, channel->remotechan);
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 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
859 TRACE(("leave send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
860 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
861
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
862 /* 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
863 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
864 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
865 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
866
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(("enter send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 CHECKCLEARTOWRITE();
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 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
871 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872 buf_putint(ses.writepayload, reason);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873 buf_putstring(ses.writepayload, text, strlen((char*)text));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 buf_putstring(ses.writepayload, lang, strlen((char*)lang));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 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
877 TRACE(("leave send_msg_channel_open_failure"))
4
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880 /* 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
881 * allocated and the receive parameters */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882 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
883 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884 unsigned int recvmaxpacket) {
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(("enter send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 CHECKCLEARTOWRITE();
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 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
890 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
891 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
892 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893 buf_putint(ses.writepayload, recvmaxpacket);
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 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
896 TRACE(("leave send_msg_channel_open_confirmation"))
4
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
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
899 /* 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
900 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
901
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
902 int closein = 0, closeout = 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
903
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
904 if (channel->type->sepfds) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
905 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
906 shutdown(fd, how);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
907 if (how == 0) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
908 closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
909 } else {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
910 closein = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
911 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
912 } else {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
913 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
914 close(fd);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
915 closein = closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
916 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
917
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
918 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
919 channel->readfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
920 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
921 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
922 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
923 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
924
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
925 if (closein && fd == channel->writefd) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
926 channel->writefd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
927 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
928 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
929 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
930 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
931
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
932 /* 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
933 * 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
934 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
935 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
936 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
937 close(fd);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
938 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
939 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
940
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
941
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
942 #if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
943 /* 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
944 * 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
945 * 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
946 * 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
947 * DROPBEAR_SUCCESS is returned */
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
948 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
949
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
950 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
951
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
952 TRACE(("enter send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
953 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
954 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
955 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
956 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
957 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
958
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
959 /* set fd non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
960 setnonblocking(fd);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
961
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
962 chan->writefd = chan->readfd = fd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
963 ses.maxfd = MAX(ses.maxfd, fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
964
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
965 chan->await_open = 1;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
966
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
967 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
968 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
969
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
970 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN);
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
971 buf_putstring(ses.writepayload, type->name, strlen(type->name));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
972 buf_putint(ses.writepayload, chan->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
973 buf_putint(ses.writepayload, RECV_MAXWINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
974 buf_putint(ses.writepayload, RECV_MAXPACKET);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
975
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
976 TRACE(("leave send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
977 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
978 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
979
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
980 /* Confirmation that our channel open request (for forwardings) was
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
981 * successful*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
982 void recv_msg_channel_open_confirmation() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
983
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
984 struct Channel * channel;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
985 int ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
986
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
987 TRACE(("enter recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
988
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
989 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
990
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
991 if (!channel->await_open) {
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
992 dropbear_exit("unexpected channel reply");
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
993 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
994 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
995
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
996 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
997 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
998 channel->transmaxpacket = buf_getint(ses.payload);
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
999
187
c44df7123b0a compile fix when TRACE debugging is enabled
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
1000 TRACE(("new chan remote %d local %d",
c44df7123b0a compile fix when TRACE debugging is enabled
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
1001 channel->remotechan, channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1002
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1003 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1004 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1005 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1006 if (ret > 0) {
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1007 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
1008 TRACE(("inithandler returned failure %d", ret))
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1009 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1010 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1011
13
db2c8e6fb284 Fixed stupid agentfwd error (using the listening FD, not the accepted on. gah)
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
1012
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
1013 TRACE(("leave recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1014 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1015
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1016 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1017 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1018
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1019 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1020
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1021 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1022
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1023 if (!channel->await_open) {
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1024 dropbear_exit("unexpected channel reply");
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1025 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1026 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1027
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1028 remove_channel(channel);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1029 }
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
1030 #endif /* USING_LISTENERS */