Mercurial > dropbear

annotate common-channel.c @ 340:454a34b2dfd1

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Fixes from Erik Hovland: cli-authpubkey.c: fix leak of keybuf cli-kex.c: fix leak of fingerprint fp cli-service.c: remove commented out code dropbearkey.c: don't attepmt to free NULL key on failure common-kex.c: only free key if it is initialised keyimport.c: remove dead encrypted-key code don't leak a FILE* loading OpenSSH keys rsa.c, dss.c: check return values for some libtommath functions svr-kex.c: check return value retrieving DH kex mpint svr-tcpfwd.c: fix null-dereference if remote tcp forward request fails tcp-accept.c: don't incorrectly free the tcpinfo var
author Matt Johnston <matt@ucc.asn.au>
date Fri, 07 Jul 2006 09:17:18 +0000
parents 6f90e5fd42cc
children 78518751cb82 59c7938af2bd
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002-2004 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 /* Handle the multiplexed channels, such as sessions, x11, agent connections */
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26
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27 #include "includes.h"
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28 #include "session.h"
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29 #include "packet.h"
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30 #include "ssh.h"
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31 #include "buffer.h"
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32 #include "circbuffer.h"
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33 #include "dbutil.h"
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34 #include "channel.h"
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35 #include "ssh.h"
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36 #include "listener.h"
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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 unsigned int exttype);
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48 static void send_msg_channel_eof(struct Channel *channel);
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49 static void send_msg_channel_close(struct Channel *channel);
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50 static void removechannel(struct Channel *channel);
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51 static void deletechannel(struct Channel *channel);
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52 static void checkinitdone(struct Channel *channel);
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53 static void checkclose(struct Channel *channel);
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54
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55 static void closewritefd(struct Channel * channel);
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56 static void closereadfd(struct Channel * channel, int fd);
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57 static void closechanfd(struct Channel *channel, int fd, int how);
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59 #define FD_UNINIT (-2)
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60 #define FD_CLOSED (-1)
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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 removechannel(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->sentclosed = newchan->recvclosed = 0;
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139 newchan->senteof = newchan->recveof = 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;
243
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150 newchan->await_open = 0;
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151
107
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152 newchan->writebuf = cbuf_new(RECV_MAXWINDOW);
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153 newchan->extrabuf = NULL; /* The user code can set it up */
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154 newchan->recvwindow = RECV_MAXWINDOW;
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155 newchan->recvdonelen = 0;
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156 newchan->recvmaxpacket = RECV_MAXPACKET;
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157
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158 ses.channels[i] = newchan;
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159 ses.chancount++;
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160
165
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161 TRACE(("leave newchannel"))
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162
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163 return newchan;
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164 }
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165
179
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166 /* Returns the channel structure corresponding to the channel in the current
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167 * data packet (ses.payload must be positioned appropriately) */
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168 struct Channel* getchannel() {
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169
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170 unsigned int chan;
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171
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172 chan = buf_getint(ses.payload);
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173 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
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174 return NULL;
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175 }
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176 return ses.channels[chan];
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177 }
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178
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179 /* Iterate through the channels, performing IO if available */
253
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180 void channelio(fd_set *readfds, fd_set *writefds) {
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181
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182 struct Channel *channel;
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183 unsigned int i;
331
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184 int ret;
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185
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186 /* iterate through all the possible channels */
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187 for (i = 0; i < ses.chansize; i++) {
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188
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189 channel = ses.channels[i];
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190 if (channel == NULL) {
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191 /* only process in-use channels */
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192 continue;
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193 }
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194
253
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195 /* read data and send it over the wire */
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196 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
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197 send_msg_channel_data(channel, 0, 0);
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198 }
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199
253
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200 /* read stderr data and send it over the wire */
109
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201 if (channel->extrabuf == NULL &&
253
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202 channel->errfd >= 0 && FD_ISSET(channel->errfd, readfds)) {
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203 send_msg_channel_data(channel, 1, SSH_EXTENDED_DATA_STDERR);
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204 }
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205
329
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206 /* if we can read from the writefd, it might be closed, so we try to
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207 * see if it has errors */
331
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208 if (IS_DROPBEAR_SERVER && channel->writefd >= 0
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209 && channel->writefd != channel->readfd
329
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210 && FD_ISSET(channel->writefd, readfds)) {
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211 if (channel->initconn) {
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212 /* Handling for "in progress" connection - this is needed
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213 * to avoid spinning 100% CPU when we connect to a server
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214 * which doesn't send anything (tcpfwding) */
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215 checkinitdone(channel);
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216 continue; /* Important not to use the channel after
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217 checkinitdone(), as it may be NULL */
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218 }
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219 ret = write(channel->writefd, NULL, 0); /* Fake write */
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220 if (ret < 0 && errno != EINTR && errno != EAGAIN) {
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221 closewritefd(channel);
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222 }
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223 }
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224
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225 /* write to program/pipe stdin */
253
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226 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
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227 if (channel->initconn) {
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228 checkinitdone(channel);
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229 continue; /* Important not to use the channel after
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230 checkinitdone(), as it may be NULL */
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231 }
253
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232 writechannel(channel, channel->writefd, channel->writebuf);
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233 }
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234
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235 /* stderr for client mode */
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236 if (channel->extrabuf != NULL
253
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237 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
108
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238 writechannel(channel, channel->errfd, channel->extrabuf);
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239 }
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240
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241 /* now handle any of the channel-closing type stuff */
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242 checkclose(channel);
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243
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244 } /* foreach channel */
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245
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246 /* Listeners such as TCP, X11, agent-auth */
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247 #ifdef USING_LISTENERS
253
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248 handle_listeners(readfds);
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249 #endif
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250 }
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251
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252
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253 /* do all the EOF/close type stuff checking for a channel */
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254 static void checkclose(struct Channel *channel) {
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255
253
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256 TRACE(("checkclose: writefd %d, readfd %d, errfd %d, sentclosed %d, recvclosed %d",
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257 channel->writefd, channel->readfd,
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258 channel->errfd, channel->sentclosed, channel->recvclosed))
300
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259 TRACE(("writebuf size %d extrabuf ptr 0x%x extrabuf size %d",
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260 cbuf_getused(channel->writebuf),
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261 channel->writebuf,
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262 channel->writebuf ? 0 : cbuf_getused(channel->extrabuf)))
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263
331
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264 /* server chansession channels are special, since readfd mightn't
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265 * close in the case of "sleep 4 & echo blah" until the sleep is up */
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266 if (channel->type->checkclose) {
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267 if (channel->type->checkclose(channel)) {
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268 closewritefd(channel);
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269 closereadfd(channel, channel->readfd);
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270 closereadfd(channel, channel->errfd);
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271 }
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272 }
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273
331
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274 if (!channel->senteof
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275 && channel->readfd == FD_CLOSED
332
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276 && (channel->extrabuf != NULL || channel->errfd == FD_CLOSED)) {
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277 send_msg_channel_eof(channel);
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278 }
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279
331
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280 if (!channel->sentclosed
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281 && channel->writefd == FD_CLOSED
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282 && channel->readfd == FD_CLOSED
332
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283 && (channel->extrabuf != NULL || channel->errfd == FD_CLOSED)) {
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284 send_msg_channel_close(channel);
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285 }
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286
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287 /* When either party wishes to terminate the channel, it sends
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288 * SSH_MSG_CHANNEL_CLOSE. Upon receiving this message, a party MUST
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289 * send back a SSH_MSG_CHANNEL_CLOSE unless it has already sent this
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290 * message for the channel. The channel is considered closed for a
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291 * party when it has both sent and received SSH_MSG_CHANNEL_CLOSE, and
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292 * the party may then reuse the channel number. A party MAY send
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293 * SSH_MSG_CHANNEL_CLOSE without having sent or received
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294 * SSH_MSG_CHANNEL_EOF.
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295 * (from draft-ietf-secsh-connect)
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296 */
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297 if (channel->recvclosed) {
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298 if (! channel->sentclosed) {
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299 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
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300 send_msg_channel_close(channel);
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301 }
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302 removechannel(channel);
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303 }
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304 }
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305
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306
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307 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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308 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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309 * it is important that the channel reference isn't used after a call to this
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310 * function */
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311 static void checkinitdone(struct Channel *channel) {
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312
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313 int val;
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314 socklen_t vallen = sizeof(val);
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315
165
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316 TRACE(("enter checkinitdone"))
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317
253
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318 if (getsockopt(channel->writefd, SOL_SOCKET, SO_ERROR, &val, &vallen)
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319 || val != 0) {
70
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320 send_msg_channel_open_failure(channel->remotechan,
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321 SSH_OPEN_CONNECT_FAILED, "", "");
253
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322 close(channel->writefd);
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323 deletechannel(channel);
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324 TRACE(("leave checkinitdone: fail"))
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325 } else {
70
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326 send_msg_channel_open_confirmation(channel, channel->recvwindow,
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diff changeset
327 channel->recvmaxpacket);
253
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328 channel->readfd = channel->writefd;
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329 channel->initconn = 0;
165
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330 TRACE(("leave checkinitdone: success"))
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331 }
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332 }
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333
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334
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335
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336 /* Send the close message and set the channel as closed */
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337 static void send_msg_channel_close(struct Channel *channel) {
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338
165
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339 TRACE(("enter send_msg_channel_close"))
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340 /* XXX server */
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341 if (channel->type->closehandler) {
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342 channel->type->closehandler(channel);
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343 }
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344
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345 CHECKCLEARTOWRITE();
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346
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347 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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348 buf_putint(ses.writepayload, channel->remotechan);
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349
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350 encrypt_packet();
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351
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352 channel->senteof = 1;
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353 channel->sentclosed = 1;
165
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diff changeset
354 TRACE(("leave send_msg_channel_close"))
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355 }
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356
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357 /* call this when trans/eof channels are closed */
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358 static void send_msg_channel_eof(struct Channel *channel) {
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359
165
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diff changeset
360 TRACE(("enter send_msg_channel_eof"))
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361 CHECKCLEARTOWRITE();
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362
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363 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
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364 buf_putint(ses.writepayload, channel->remotechan);
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365
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366 encrypt_packet();
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367
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368 channel->senteof = 1;
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369
165
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diff changeset
370 TRACE(("leave send_msg_channel_eof"))
4
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371 }
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372
107
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diff changeset
373 /* Called to write data out to the local side of the channel.
4
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374 * Only called when we know we can write to a channel, writes as much as
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375 * possible */
108
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diff changeset
376 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf) {
4
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377
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378 int len, maxlen;
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379
165
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diff changeset
380 TRACE(("enter writechannel"))
4
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381
107
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diff changeset
382 maxlen = cbuf_readlen(cbuf);
4
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383
107
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diff changeset
384 /* Write the data out */
108
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diff changeset
385 len = write(fd, cbuf_readptr(cbuf, maxlen), maxlen);
4
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386 if (len <= 0) {
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387 if (len < 0 && errno != EINTR) {
108
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diff changeset
388 /* no more to write - we close it even if the fd was stderr, since
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diff changeset
389 * that's a nasty failure too */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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diff changeset
390 closewritefd(channel);
4
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391 }
165
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diff changeset
392 TRACE(("leave writechannel: len <= 0"))
4
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393 return;
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394 }
107
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parents: 70
diff changeset
395
Matt Johnston <matt@ucc.asn.au>
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diff changeset
396 cbuf_incrread(cbuf, len);
108
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parents: 107
diff changeset
397 channel->recvdonelen += len;
107
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parents: 70
diff changeset
398
269
92b9b182c615 Check that the output circular buffer is actually empty before
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parents: 261
diff changeset
399 if (fd == channel->writefd && cbuf_getused(cbuf) == 0 && channel->recveof) {
107
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parents: 70
diff changeset
400 /* Check if we're closing up */
253
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diff changeset
401 closewritefd(channel);
165
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parents: 156
diff changeset
402 TRACE(("leave writechannel: recveof set"))
107
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diff changeset
403 return;
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parents: 70
diff changeset
404 }
4
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405
107
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diff changeset
406 /* Window adjust handling */
108
10f4d3319780 - added circular buffering for channels
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parents: 107
diff changeset
407 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
107
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parents: 70
diff changeset
408 /* Set it back to max window */
108
10f4d3319780 - added circular buffering for channels
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diff changeset
409 send_msg_channel_window_adjust(channel, channel->recvdonelen);
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diff changeset
410 channel->recvwindow += channel->recvdonelen;
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diff changeset
411 channel->recvdonelen = 0;
4
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diff changeset
412 }
108
10f4d3319780 - added circular buffering for channels
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parents: 107
diff changeset
413
241
c5d3ef11155f * use own assertions which should get logged properly
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parents: 221
diff changeset
414 dropbear_assert(channel->recvwindow <= RECV_MAXWINDOW);
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parents: 221
diff changeset
415 dropbear_assert(channel->recvwindow <= cbuf_getavail(channel->writebuf));
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parents: 221
diff changeset
416 dropbear_assert(channel->extrabuf == NULL ||
108
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parents: 107
diff changeset
417 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107
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parents: 70
diff changeset
418
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
419
165
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diff changeset
420 TRACE(("leave writechannel"))
4
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diff changeset
421 }
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diff changeset
422
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diff changeset
423 /* Set the file descriptors for the main select in session.c
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diff changeset
424 * This avoid channels which don't have any window available, are closed, etc*/
253
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parents: 243
diff changeset
425 void setchannelfds(fd_set *readfds, fd_set *writefds) {
4
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426
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diff changeset
427 unsigned int i;
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diff changeset
428 struct Channel * channel;
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diff changeset
429
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diff changeset
430 for (i = 0; i < ses.chansize; i++) {
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diff changeset
431
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diff changeset
432 channel = ses.channels[i];
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diff changeset
433 if (channel == NULL) {
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diff changeset
434 continue;
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parents:
diff changeset
435 }
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diff changeset
436
107
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diff changeset
437 /* Stuff to put over the wire */
4
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diff changeset
438 if (channel->transwindow > 0) {
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diff changeset
439
253
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parents: 243
diff changeset
440 if (channel->readfd >= 0) {
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diff changeset
441 FD_SET(channel->readfd, readfds);
4
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442 }
107
Matt Johnston <matt@ucc.asn.au>
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diff changeset
443
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
444 if (channel->extrabuf == NULL && channel->errfd >= 0) {
253
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diff changeset
445 FD_SET(channel->errfd, readfds);
4
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446 }
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parents:
diff changeset
447 }
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diff changeset
448
329
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diff changeset
449 TRACE(("writefd = %d, readfd %d, errfd %d, bufused %d",
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Matt Johnston <matt@ucc.asn.au>
parents: 261
diff changeset
450 channel->writefd, channel->readfd,
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parents: 261
diff changeset
451 channel->errfd,
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parents: 261
diff changeset
452 cbuf_getused(channel->writebuf) ))
331
d6b8815a9b5e progress towards exiting on writefd closure rather than
Matt Johnston <matt@ucc.asn.au>
parents: 330
diff changeset
453
d6b8815a9b5e progress towards exiting on writefd closure rather than
Matt Johnston <matt@ucc.asn.au>
parents: 330
diff changeset
454 /* For checking FD status (ie closure etc) - we don't actually
d6b8815a9b5e progress towards exiting on writefd closure rather than
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parents: 330
diff changeset
455 * read data from writefd. We don't want to do this for the client,
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Matt Johnston <matt@ucc.asn.au>
parents: 330
diff changeset
456 * since redirection to /dev/null will make it spin in the select */
d6b8815a9b5e progress towards exiting on writefd closure rather than
Matt Johnston <matt@ucc.asn.au>
parents: 330
diff changeset
457 if (IS_DROPBEAR_SERVER && channel->writefd >= 0
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Matt Johnston <matt@ucc.asn.au>
parents: 330
diff changeset
458 && channel->writefd != channel->readfd) {
329
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parents: 261
diff changeset
459 FD_SET(channel->writefd, readfds);
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parents: 261
diff changeset
460 }
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diff changeset
461
331
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diff changeset
462 /* Stuff from the wire */
253
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parents: 243
diff changeset
463 if ((channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0 )
107
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parents: 70
diff changeset
464 || channel->initconn) {
253
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parents: 243
diff changeset
465 FD_SET(channel->writefd, writefds);
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parents:
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466 }
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parents:
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467
107
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468 if (channel->extrabuf != NULL && channel->errfd >= 0
108
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parents: 107
diff changeset
469 && cbuf_getused(channel->extrabuf) > 0 ) {
253
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470 FD_SET(channel->errfd, writefds);
107
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parents: 70
diff changeset
471 }
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472
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473 } /* foreach channel */
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474
9
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diff changeset
475 #ifdef USING_LISTENERS
253
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diff changeset
476 set_listener_fds(readfds);
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477 #endif
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parents:
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478
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parents:
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479 }
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parents:
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480
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481 /* handle the channel EOF event, by closing the channel filedescriptor. The
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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482 * channel isn't closed yet, it is left until the incoming (from the program
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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483 * etc) FD is also EOF */
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Matt Johnston <matt@ucc.asn.au>
parents:
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484 void recv_msg_channel_eof() {
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Matt Johnston <matt@ucc.asn.au>
parents:
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485
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Matt Johnston <matt@ucc.asn.au>
parents:
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486 struct Channel * channel;
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487
165
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diff changeset
488 TRACE(("enter recv_msg_channel_eof"))
4
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489
179
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diff changeset
490 channel = getchannel();
4
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491 if (channel == NULL) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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492 dropbear_exit("EOF for unknown channel");
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 }
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parents:
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494
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parents:
diff changeset
495 channel->recveof = 1;
108
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Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
496 if (cbuf_getused(channel->writebuf) == 0
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
497 && (channel->extrabuf == NULL
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
498 || cbuf_getused(channel->extrabuf) == 0)) {
253
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parents: 243
diff changeset
499 closewritefd(channel);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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500 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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501
165
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parents: 156
diff changeset
502 TRACE(("leave recv_msg_channel_eof"))
4
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parents:
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503 }
fe6bca95afa7 Makefile.in contains updated files required
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parents:
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504
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 /* 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
507 void recv_msg_channel_close() {
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Matt Johnston <matt@ucc.asn.au>
parents:
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508
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 struct Channel * channel;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510
165
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parents: 156
diff changeset
511 TRACE(("enter recv_msg_channel_close"))
4
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parents:
diff changeset
512
179
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Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
513 channel = getchannel();
4
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Matt Johnston <matt@ucc.asn.au>
parents:
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514 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 /* disconnect ? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516 dropbear_exit("Close for unknown channel");
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Matt Johnston <matt@ucc.asn.au>
parents:
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517 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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518
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519 channel->recveof = 1;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 channel->recvclosed = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 if (channel->sentclosed) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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523 removechannel(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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525
165
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parents: 156
diff changeset
526 TRACE(("leave recv_msg_channel_close"))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 /* 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
530 * channel close */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 static void removechannel(struct Channel * channel) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532
165
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Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
533 TRACE(("enter removechannel"))
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
534 TRACE(("channel index is %d", channel->index))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
536 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
537 channel->writebuf = NULL;
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
539 if (channel->extrabuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
540 cbuf_free(channel->extrabuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
541 channel->extrabuf = NULL;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
542 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
543
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
544
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545 /* close the FDs in case they haven't been done
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
546 * yet (ie they were shutdown etc */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
547 close(channel->writefd);
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
548 close(channel->readfd);
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
549 close(channel->errfd);
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
550
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
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parents: 62
diff changeset
551 channel->typedata = NULL;
4
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parents:
diff changeset
552
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553 deletechannel(channel);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554
165
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parents: 156
diff changeset
555 TRACE(("leave removechannel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 /* Remove a channel entry */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 static void deletechannel(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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560
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561 ses.channels[channel->index] = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562 m_free(channel);
37
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Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
563 ses.chancount--;
4
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Matt Johnston <matt@ucc.asn.au>
parents:
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564
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 /* 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
569 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570 void recv_msg_channel_request() {
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 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573
165
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parents: 156
diff changeset
574 TRACE(("enter recv_msg_channel_request"))
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575
179
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parents: 165
diff changeset
576 channel = getchannel();
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 /* disconnect ? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582 if (channel->type->reqhandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585 send_msg_channel_failure(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587
165
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parents: 156
diff changeset
588 TRACE(("leave recv_msg_channel_request"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
589
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
590 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
592 /* 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
593 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
594 * 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
595 * 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
596 * exttype */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
597 static void send_msg_channel_data(struct Channel *channel, int isextended,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
598 unsigned int exttype) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
599
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
600 buffer *buf;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
602 unsigned int maxlen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
603 int fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
604
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
605 /* TRACE(("enter send_msg_channel_data"))
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
606 TRACE(("extended = %d type = %d", isextended, exttype))*/
4
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 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
610 dropbear_assert(!channel->sentclosed);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614 } else {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
615 fd = channel->readfd;
4
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parents:
diff changeset
616 }
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
617 dropbear_assert(fd >= 0);
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
619 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
620 /* -(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
621 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
622 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
623 ses.writepayload->size - 1 - 4 - 4 - (isextended ? 4 : 0));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
624 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
625 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
626 return; /* the data will get written later */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
627 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 /* read the data */
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
630 TRACE(("maxlen %d", maxlen))
4
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parents:
diff changeset
631 buf = buf_new(maxlen);
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
632 TRACE(("buf pos %d data %x", buf->pos, buf->data))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
633 len = read(fd, buf_getwriteptr(buf, maxlen), maxlen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 /* on error/eof, send eof */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636 if (len == 0 || errno != EINTR) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
637 closereadfd(channel, fd);
4
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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 buf_free(buf);
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
640 buf = NULL;
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
641 TRACE(("leave send_msg_channel_data: read err or EOF for fd %d",
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
642 channel->index));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645 buf_incrlen(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648 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
649 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 buf_putint(ses.writepayload, exttype);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655 buf_putstring(ses.writepayload, buf_getptr(buf, len), len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656 buf_free(buf);
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
657 buf = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 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
662 TRACE(("leave send_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
665 /* We receive channel data */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
667
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
668 struct Channel *channel;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
669
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
670 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
671 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
673 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
674
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
675 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
676 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
677
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
678 /* 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
679 * for writing to the local file descriptor */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
680 void common_recv_msg_channel_data(struct Channel *channel, int fd,
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
681 circbuffer * cbuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
682
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
683 unsigned int datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
684 unsigned int maxdata;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
685 unsigned int buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
686 unsigned int len;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
687
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
688 TRACE(("enter recv_msg_channel_data"))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
689
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
690 if (channel->recveof) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
691 dropbear_exit("received data after eof");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
693
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
694 if (fd < 0) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
695 dropbear_exit("received data with bad writefd");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
696 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
697
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
698 datalen = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
699
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
700
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
701 maxdata = cbuf_getavail(cbuf);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
702
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
703 /* 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
704 * 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
705 * just die horribly */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
706 if (datalen > maxdata) {
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
707 dropbear_exit("Oversized packet");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
709
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
710 /* We may have to run throught twice, if the buffer wraps around. Can't
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
711 * just "leave it for next time" like with writechannel, since this
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
712 * is payload data */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
713 len = datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
714 while (len > 0) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
715 buflen = cbuf_writelen(cbuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
716 buflen = MIN(buflen, len);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
717
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
718 memcpy(cbuf_writeptr(cbuf, buflen),
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
719 buf_getptr(ses.payload, buflen), buflen);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
720 cbuf_incrwrite(cbuf, buflen);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
721 buf_incrpos(ses.payload, buflen);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
722 len -= buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
723 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
724
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
725 dropbear_assert(channel->recvwindow >= datalen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
726 channel->recvwindow -= datalen;
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
727 dropbear_assert(channel->recvwindow <= RECV_MAXWINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
728
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(("leave recv_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
730 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
731
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
732 /* 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
733 * 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
734 * 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
735 void recv_msg_channel_window_adjust() {
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 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
738 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
739
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
740 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
741 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
742 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
743 }
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 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
746 TRACE(("received window increment %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
747 incr = MIN(incr, MAX_TRANS_WIN_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 channel->transwindow += incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
750 channel->transwindow = MIN(channel->transwindow, MAX_TRANS_WINDOW);
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 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
753
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754 /* 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
755 * end know */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
756 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
757 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
758
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
759 TRACE(("sending window adjust %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
760 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
761
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
762 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
763 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
764 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
765
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
766 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769 /* 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
770 /* XXX server */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
771 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
772
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
773 unsigned char *type;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
775 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
777 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
778 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
779 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
780 int ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
781
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782
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
783 TRACE(("enter recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
784
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
785 /* get the packet contents */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
786 type = buf_getstring(ses.payload, &typelen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789 transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790 transwindow = MIN(transwindow, MAX_TRANS_WINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
791 transmaxpacket = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792 transmaxpacket = MIN(transmaxpacket, MAX_TRANS_PAYLOAD_LEN);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
793
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
795 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
796 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
797 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
798
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
799 /* 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
800 * 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
801 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
802 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
803 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
804 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
809
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
810 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
811 TRACE(("No matching type for '%s'", type))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
812 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
813 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
814
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
815 TRACE(("matched type '%s'", type))
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
816
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
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 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
821 TRACE(("newchannel returned NULL"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
822 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
823 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
824
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
825 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826 ret = channel->type->inithandler(channel);
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
827 if (ret > 0) {
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
828 if (ret == SSH_OPEN_IN_PROGRESS) {
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
829 /* We'll send the confirmation later */
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
830 goto cleanup;
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
831 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
832 errtype = ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
833 deletechannel(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
834 TRACE(("inithandler returned failure %d", ret))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
835 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
836 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
837 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
838
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
839 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
840 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
841 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
842 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
844 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
845 TRACE(("recv_msg_channel_open failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
846 send_msg_channel_open_failure(remotechan, errtype, "", "");
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 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
849 m_free(type);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850
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
851 TRACE(("leave recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
852 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854 /* Send a failure message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 void send_msg_channel_failure(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
856
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
857 TRACE(("enter send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
858 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
859
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
860 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
861 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
862
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
863 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
864 TRACE(("leave send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
865 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
866
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
867 /* Send a success message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 void send_msg_channel_success(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
869
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
870 TRACE(("enter send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 buf_putint(ses.writepayload, channel->remotechan);
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_success"))
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 /* 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
881 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882 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
883 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
884
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
885 TRACE(("enter send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
886 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
888 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
889 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890 buf_putint(ses.writepayload, reason);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
891 buf_putstring(ses.writepayload, text, strlen((char*)text));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
892 buf_putstring(ses.writepayload, lang, strlen((char*)lang));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
894 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
895 TRACE(("leave send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 }
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 /* 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
899 * allocated and the receive parameters */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
900 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
901 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
902 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
903
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
904 TRACE(("enter send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
905 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
906
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
907 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
908 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
909 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
910 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
911 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
912
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913 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
914 TRACE(("leave send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
915 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
916
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
917 #if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 /* 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
919 * 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
920 * 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
921 * 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
922 * DROPBEAR_SUCCESS is returned */
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
923 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
924
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
925 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
926
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
927 TRACE(("enter send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
929 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
930 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
931 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
933
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
934 /* set fd non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
935 setnonblocking(fd);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
936
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
937 chan->writefd = chan->readfd = fd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
938 ses.maxfd = MAX(ses.maxfd, fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
939
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
940 chan->await_open = 1;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
941
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
942 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
943 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
944
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
945 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
946 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
947 buf_putint(ses.writepayload, chan->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
948 buf_putint(ses.writepayload, RECV_MAXWINDOW);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
949 buf_putint(ses.writepayload, RECV_MAXPACKET);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
950
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
951 TRACE(("leave send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
952 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
953 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
954
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
955 /* 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
956 * successful*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
957 void recv_msg_channel_open_confirmation() {
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 struct Channel * channel;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
960 int ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
961
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
962 TRACE(("enter recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
963
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
964 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
965 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
966 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
967 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
968
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
969 if (!channel->await_open) {
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
970 dropbear_exit("unexpected channel reply");
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
971 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
972 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
973
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
974 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
975 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
976 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
977
187
c44df7123b0a compile fix when TRACE debugging is enabled
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
978 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
979 channel->remotechan, channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
980
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
981 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
982 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
983 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
984 if (ret > 0) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
985 removechannel(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
986 TRACE(("inithandler returned failure %d", ret))
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
987 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
988 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
989
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
990
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
991 TRACE(("leave recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
992 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
993
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
994 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
995 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
996
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
997 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
998
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
999 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1000 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1001 dropbear_exit("Unknown channel");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1002 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1003
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1004 if (!channel->await_open) {
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1005 dropbear_exit("unexpected channel reply");
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1006 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1007 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1008
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1009 removechannel(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1010 }
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
1011 #endif /* USING_LISTENERS */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1012
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1013 /* close a stdout/stderr fd */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1014 static void closereadfd(struct Channel * channel, int fd) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1015
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1016 /* don't close it if it is the same as writefd,
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1017 * unless writefd is already set -1 */
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1018 TRACE(("enter closereadfd"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1019 closechanfd(channel, fd, 0);
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1020 TRACE(("leave closereadfd"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1021 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1022
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1023 /* close a stdin fd */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1024 static void closewritefd(struct Channel * channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1025
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1026 TRACE(("enter closewritefd"))
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1027 closechanfd(channel, channel->writefd, 1);
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1028 TRACE(("leave closewritefd"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1029 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1030
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1031 /* close a fd, how is 0 for stdout/stderr, 1 for stdin */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1032 static void closechanfd(struct Channel *channel, int fd, int how) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1033
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1034 int closein = 0, closeout = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1035
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1036 /* XXX server */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1037 if (channel->type->sepfds) {
221
a4b93a2ed879 * close a file descriptor after we've shutdown() both sides, to avoid a leak
Matt Johnston <matt@ucc.asn.au>
parents: 187
diff changeset
1038 TRACE(("shutdown((%d), %d)", fd, how))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1039 shutdown(fd, how);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1040 if (how == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1041 closeout = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1042 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1043 closein = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1044 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1045 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1046 close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1047 closein = closeout = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1048 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1049
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1050 if (closeout && fd == channel->readfd) {
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1051 channel->readfd = FD_CLOSED;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1052 }
109
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diff changeset
1053 if (closeout && (channel->extrabuf == NULL) && (fd == channel->errfd)) {
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parents: 108
diff changeset
1054 channel->errfd = FD_CLOSED;
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
1055 }
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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parents: 108
diff changeset
1056
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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diff changeset
1057 if (closein && fd == channel->writefd) {
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parents: 243
diff changeset
1058 channel->writefd = FD_CLOSED;
4
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parents:
diff changeset
1059 }
109
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parents: 108
diff changeset
1060 if (closein && (channel->extrabuf != NULL) && (fd == channel->errfd)) {
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parents: 108
diff changeset
1061 channel->errfd = FD_CLOSED;
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parents: 108
diff changeset
1062 }
221
a4b93a2ed879 * close a file descriptor after we've shutdown() both sides, to avoid a leak
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parents: 187
diff changeset
1063
a4b93a2ed879 * close a file descriptor after we've shutdown() both sides, to avoid a leak
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parents: 187
diff changeset
1064 /* if we called shutdown on it and all references are gone, then we
a4b93a2ed879 * close a file descriptor after we've shutdown() both sides, to avoid a leak
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parents: 187
diff changeset
1065 * need to close() it to stop it lingering */
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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parents: 243
diff changeset
1066 if (channel->type->sepfds && channel->readfd == FD_CLOSED
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1067 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
221
a4b93a2ed879 * close a file descriptor after we've shutdown() both sides, to avoid a leak
Matt Johnston <matt@ucc.asn.au>
parents: 187
diff changeset
1068 close(fd);
a4b93a2ed879 * close a file descriptor after we've shutdown() both sides, to avoid a leak
Matt Johnston <matt@ucc.asn.au>
parents: 187
diff changeset
1069 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1070 }