annotate common-channel.c @ 970:0bb16232e7c4

Make keepalive handling more robust, this should now match what OpenSSH does
author Matt Johnston <matt@ucc.asn.au>
date Tue, 19 Aug 2014 23:08:56 +0800
parents 36eacc322e00
children 02baa0b334e8 d3925ed45a85
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002-2004 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 /* Handle the multiplexed channels, such as sessions, x11, agent connections */
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27 #include "includes.h"
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28 #include "session.h"
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29 #include "packet.h"
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30 #include "ssh.h"
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31 #include "buffer.h"
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32 #include "circbuffer.h"
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33 #include "dbutil.h"
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34 #include "channel.h"
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35 #include "ssh.h"
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36 #include "listener.h"
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37 #include "runopts.h"
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39 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
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40 const unsigned char *text, const unsigned char *lang);
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41 static void send_msg_channel_open_confirmation(struct Channel* channel,
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42 unsigned int recvwindow,
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43 unsigned int recvmaxpacket);
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44 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf);
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45 static void send_msg_channel_window_adjust(struct Channel *channel,
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46 unsigned int incr);
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47 static void send_msg_channel_data(struct Channel *channel, int isextended);
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48 static void send_msg_channel_eof(struct Channel *channel);
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49 static void send_msg_channel_close(struct Channel *channel);
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50 static void remove_channel(struct Channel *channel);
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51 static void check_in_progress(struct Channel *channel);
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52 static unsigned int write_pending(struct Channel * channel);
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53 static void check_close(struct Channel *channel);
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54 static void close_chan_fd(struct Channel *channel, int fd, int how);
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56 #define FD_UNINIT (-2)
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57 #define FD_CLOSED (-1)
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58
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59 #define ERRFD_IS_READ(channel) ((channel)->extrabuf == NULL)
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60 #define ERRFD_IS_WRITE(channel) (!ERRFD_IS_READ(channel))
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61
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62 /* allow space for:
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63 * 1 byte byte SSH_MSG_CHANNEL_DATA
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64 * 4 bytes uint32 recipient channel
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65 * 4 bytes string data
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66 */
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67 #define RECV_MAX_CHANNEL_DATA_LEN (RECV_MAX_PAYLOAD_LEN-(1+4+4))
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69 /* Initialise all the channels */
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70 void chaninitialise(const struct ChanType *chantypes[]) {
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72 /* may as well create space for a single channel */
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73 ses.channels = (struct Channel**)m_malloc(sizeof(struct Channel*));
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74 ses.chansize = 1;
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75 ses.channels[0] = NULL;
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76 ses.chancount = 0;
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78 ses.chantypes = chantypes;
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79
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80 #ifdef USING_LISTENERS
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81 listeners_initialise();
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82 #endif
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84 }
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85
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86 /* Clean up channels, freeing allocated memory */
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87 void chancleanup() {
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89 unsigned int i;
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90
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91 TRACE(("enter chancleanup"))
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92 for (i = 0; i < ses.chansize; i++) {
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93 if (ses.channels[i] != NULL) {
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94 TRACE(("channel %d closing", i))
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95 remove_channel(ses.channels[i]);
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96 }
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97 }
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98 m_free(ses.channels);
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99 TRACE(("leave chancleanup"))
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100 }
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101
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102 static void
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103 chan_initwritebuf(struct Channel *channel)
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104 {
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105 dropbear_assert(channel->writebuf->size == 0 && channel->recvwindow == 0);
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106 cbuf_free(channel->writebuf);
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107 channel->writebuf = cbuf_new(opts.recv_window);
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108 channel->recvwindow = opts.recv_window;
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109 }
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110
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111 /* Create a new channel entry, send a reply confirm or failure */
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112 /* If remotechan, transwindow and transmaxpacket are not know (for a new
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113 * outgoing connection, with them to be filled on confirmation), they should
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114 * all be set to 0 */
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115 static struct Channel* newchannel(unsigned int remotechan,
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116 const struct ChanType *type,
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117 unsigned int transwindow, unsigned int transmaxpacket) {
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118
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119 struct Channel * newchan;
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120 unsigned int i, j;
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121
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122 TRACE(("enter newchannel"))
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123
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124 /* first see if we can use existing channels */
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125 for (i = 0; i < ses.chansize; i++) {
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126 if (ses.channels[i] == NULL) {
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127 break;
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128 }
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129 }
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130
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131 /* otherwise extend the list */
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132 if (i == ses.chansize) {
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133 if (ses.chansize >= MAX_CHANNELS) {
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134 TRACE(("leave newchannel: max chans reached"))
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135 return NULL;
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136 }
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137
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138 /* extend the channels */
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139 ses.channels = (struct Channel**)m_realloc(ses.channels,
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140 (ses.chansize+CHAN_EXTEND_SIZE)*sizeof(struct Channel*));
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142 ses.chansize += CHAN_EXTEND_SIZE;
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143
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144 /* set the new channels to null */
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145 for (j = i; j < ses.chansize; j++) {
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146 ses.channels[j] = NULL;
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147 }
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148
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149 }
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150
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151 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
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152 newchan->type = type;
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153 newchan->index = i;
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154 newchan->sent_close = newchan->recv_close = 0;
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155 newchan->sent_eof = newchan->recv_eof = 0;
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156 newchan->close_handler_done = 0;
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157
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158 newchan->remotechan = remotechan;
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159 newchan->transwindow = transwindow;
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160 newchan->transmaxpacket = transmaxpacket;
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161
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162 newchan->typedata = NULL;
253
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163 newchan->writefd = FD_UNINIT;
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164 newchan->readfd = FD_UNINIT;
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165 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
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166 newchan->initconn = 0;
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
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167 newchan->await_open = 0;
416
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168 newchan->flushing = 0;
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169
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170 newchan->writebuf = cbuf_new(0); /* resized later by chan_initwritebuf */
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171 newchan->recvwindow = 0;
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172
107
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173 newchan->extrabuf = NULL; /* The user code can set it up */
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174 newchan->recvdonelen = 0;
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175 newchan->recvmaxpacket = RECV_MAX_CHANNEL_DATA_LEN;
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176
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177 newchan->prio = DROPBEAR_CHANNEL_PRIO_EARLY; /* inithandler sets it */
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178
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179 ses.channels[i] = newchan;
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180 ses.chancount++;
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181
165
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182 TRACE(("leave newchannel"))
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183
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184 return newchan;
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185 }
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186
179
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187 /* Returns the channel structure corresponding to the channel in the current
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188 * data packet (ses.payload must be positioned appropriately).
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189 * A valid channel is always returns, it will fail fatally with an unknown
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190 * channel */
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191 static struct Channel* getchannel_msg(const char* kind) {
179
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192
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193 unsigned int chan;
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194
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195 chan = buf_getint(ses.payload);
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196 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
362
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197 if (kind) {
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198 dropbear_exit("%s for unknown channel %d", kind, chan);
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199 } else {
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200 dropbear_exit("Unknown channel %d", chan);
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201 }
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202 }
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203 return ses.channels[chan];
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204 }
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205
362
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206 struct Channel* getchannel() {
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207 return getchannel_msg(NULL);
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208 }
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209
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210 /* Iterate through the channels, performing IO if available */
253
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211 void channelio(fd_set *readfds, fd_set *writefds) {
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212
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213 /* Listeners such as TCP, X11, agent-auth */
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214 struct Channel *channel;
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215 unsigned int i;
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216
363
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217 /* foreach channel */
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218 for (i = 0; i < ses.chansize; i++) {
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219 /* Close checking only needs to occur for channels that had IO events */
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220 int do_check_close = 0;
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221
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222 channel = ses.channels[i];
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223 if (channel == NULL) {
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224 /* only process in-use channels */
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225 continue;
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226 }
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227
253
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228 /* read data and send it over the wire */
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229 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
416
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diff changeset
230 TRACE(("send normal readfd"))
363
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diff changeset
231 send_msg_channel_data(channel, 0);
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232 do_check_close = 1;
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233 }
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234
253
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235 /* read stderr data and send it over the wire */
416
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diff changeset
236 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
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diff changeset
237 && FD_ISSET(channel->errfd, readfds)) {
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diff changeset
238 TRACE(("send normal errfd"))
363
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diff changeset
239 send_msg_channel_data(channel, 1);
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diff changeset
240 do_check_close = 1;
395
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parents: 394
diff changeset
241 }
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diff changeset
242
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243 /* write to program/pipe stdin */
253
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parents: 243
diff changeset
244 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
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245 if (channel->initconn) {
363
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diff changeset
246 /* XXX should this go somewhere cleaner? */
359
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diff changeset
247 check_in_progress(channel);
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248 continue; /* Important not to use the channel after
359
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diff changeset
249 check_in_progress(), as it may be NULL */
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250 }
253
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diff changeset
251 writechannel(channel, channel->writefd, channel->writebuf);
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252 do_check_close = 1;
108
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diff changeset
253 }
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254
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diff changeset
255 /* stderr for client mode */
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diff changeset
256 if (ERRFD_IS_WRITE(channel)
253
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parents: 243
diff changeset
257 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
108
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diff changeset
258 writechannel(channel, channel->errfd, channel->extrabuf);
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259 do_check_close = 1;
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260 }
955
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diff changeset
261
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diff changeset
262 if (ses.channel_signal_pending) {
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diff changeset
263 /* SIGCHLD can change channel state for server sessions */
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264 do_check_close = 1;
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diff changeset
265 ses.channel_signal_pending = 0;
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266 }
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267
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diff changeset
268 /* handle any channel closing etc */
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269 if (do_check_close) {
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diff changeset
270 check_close(channel);
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271 }
363
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272 }
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273
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diff changeset
274 #ifdef USING_LISTENERS
253
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diff changeset
275 handle_listeners(readfds);
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276 #endif
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277 }
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278
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279
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diff changeset
280 /* Returns true if there is data remaining to be written to stdin or
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diff changeset
281 * stderr of a channel's endpoint. */
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diff changeset
282 static unsigned int write_pending(struct Channel * channel) {
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283
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diff changeset
284 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
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diff changeset
285 return 1;
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diff changeset
286 } else if (channel->errfd >= 0 && channel->extrabuf &&
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diff changeset
287 cbuf_getused(channel->extrabuf) > 0) {
363
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diff changeset
288 return 1;
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diff changeset
289 }
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diff changeset
290 return 0;
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291 }
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292
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293
359
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294 /* EOF/close handling */
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diff changeset
295 static void check_close(struct Channel *channel) {
467
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296 int close_allowed = 0;
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297
731
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298 TRACE2(("check_close: writefd %d, readfd %d, errfd %d, sent_close %d, recv_close %d",
253
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299 channel->writefd, channel->readfd,
359
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300 channel->errfd, channel->sent_close, channel->recv_close))
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301 TRACE2(("writebuf size %d extrabuf size %d",
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302 channel->writebuf ? cbuf_getused(channel->writebuf) : 0,
375
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parents: 365
diff changeset
303 channel->extrabuf ? cbuf_getused(channel->extrabuf) : 0))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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diff changeset
304
652
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305 if (!channel->flushing
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306 && !channel->close_handler_done
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307 && channel->type->check_close
416
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308 && channel->type->check_close(channel))
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diff changeset
309 {
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310 channel->flushing = 1;
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311 }
467
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312
504
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313 /* if a type-specific check_close is defined we will only exit
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314 once that has been triggered. this is only used for a server "session"
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315 channel, to ensure that the shell has exited (and the exit status
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diff changeset
316 retrieved) before we close things up. */
467
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317 if (!channel->type->check_close
652
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318 || channel->close_handler_done
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319 || channel->type->check_close(channel)) {
467
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320 close_allowed = 1;
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321 }
416
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322
467
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323 if (channel->recv_close && !write_pending(channel) && close_allowed) {
416
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324 if (!channel->sent_close) {
165
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325 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
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326 send_msg_channel_close(channel);
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327 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
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328 remove_channel(channel);
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diff changeset
329 return;
397
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330 }
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331
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332 if ((channel->recv_eof && !write_pending(channel))
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333 /* have a server "session" and child has exited */
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diff changeset
334 || (channel->type->check_close && close_allowed)) {
364
90cb290836de Passes most test cases now
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335 close_chan_fd(channel, channel->writefd, SHUT_WR);
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336 }
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337
416
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diff changeset
338 /* Special handling for flushing read data after an exit. We
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diff changeset
339 read regardless of whether the select FD was set,
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diff changeset
340 and if there isn't data available, the channel will get closed. */
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diff changeset
341 if (channel->flushing) {
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diff changeset
342 TRACE(("might send data, flushing"))
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diff changeset
343 if (channel->readfd >= 0 && channel->transwindow > 0) {
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diff changeset
344 TRACE(("send data readfd"))
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diff changeset
345 send_msg_channel_data(channel, 0);
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diff changeset
346 }
439
ab370c629d36 Fix a stupid bug s/readfd/errfd/ affecting channel close on child exit
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parents: 433
diff changeset
347 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
416
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348 && channel->transwindow > 0) {
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diff changeset
349 TRACE(("send data errfd"))
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350 send_msg_channel_data(channel, 1);
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351 }
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352 }
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diff changeset
353
375
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diff changeset
354 /* If we're not going to send any more data, send EOF */
359
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355 if (!channel->sent_eof
365
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diff changeset
356 && channel->readfd == FD_CLOSED
375
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diff changeset
357 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)) {
397
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diff changeset
358 send_msg_channel_eof(channel);
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diff changeset
359 }
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360
375
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diff changeset
361 /* And if we can't receive any more data from them either, close up */
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362 if (channel->readfd == FD_CLOSED
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363 && channel->writefd == FD_CLOSED
423
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parents: 416
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364 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)
467
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365 && !channel->sent_close
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366 && close_allowed
416
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367 && !write_pending(channel)) {
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diff changeset
368 TRACE(("sending close, readfd is closed"))
397
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diff changeset
369 send_msg_channel_close(channel);
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370 }
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371 }
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372
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parents:
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373 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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parents:
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374 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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parents:
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375 * it is important that the channel reference isn't used after a call to this
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376 * function */
359
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diff changeset
377 static void check_in_progress(struct Channel *channel) {
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378
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379 int val;
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380 socklen_t vallen = sizeof(val);
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381
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382 TRACE(("enter check_in_progress"))
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383
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384 if (getsockopt(channel->writefd, SOL_SOCKET, SO_ERROR, &val, &vallen)
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385 || val != 0) {
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diff changeset
386 send_msg_channel_open_failure(channel->remotechan,
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parents: 62
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387 SSH_OPEN_CONNECT_FAILED, "", "");
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388 close(channel->writefd);
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389 remove_channel(channel);
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390 TRACE(("leave check_in_progress: fail"))
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391 } else {
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392 chan_initwritebuf(channel);
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diff changeset
393 send_msg_channel_open_confirmation(channel, channel->recvwindow,
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diff changeset
394 channel->recvmaxpacket);
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diff changeset
395 channel->readfd = channel->writefd;
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396 channel->initconn = 0;
359
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397 TRACE(("leave check_in_progress: success"))
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398 }
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399 }
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400
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401
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parents:
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402 /* Send the close message and set the channel as closed */
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parents:
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403 static void send_msg_channel_close(struct Channel *channel) {
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404
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405 TRACE(("enter send_msg_channel_close %p", channel))
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406 if (channel->type->closehandler
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407 && !channel->close_handler_done) {
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408 channel->type->closehandler(channel);
652
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409 channel->close_handler_done = 1;
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410 }
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411
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412 CHECKCLEARTOWRITE();
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413
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414 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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415 buf_putint(ses.writepayload, channel->remotechan);
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416
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417 encrypt_packet();
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418
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diff changeset
419 channel->sent_eof = 1;
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420 channel->sent_close = 1;
416
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421 close_chan_fd(channel, channel->readfd, SHUT_RD);
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422 close_chan_fd(channel, channel->errfd, SHUT_RDWR);
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423 close_chan_fd(channel, channel->writefd, SHUT_WR);
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diff changeset
424 TRACE(("leave send_msg_channel_close"))
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425 }
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parents:
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426
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parents:
diff changeset
427 /* call this when trans/eof channels are closed */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
428 static void send_msg_channel_eof(struct Channel *channel) {
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429
165
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diff changeset
430 TRACE(("enter send_msg_channel_eof"))
4
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diff changeset
431 CHECKCLEARTOWRITE();
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diff changeset
432
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 buf_putint(ses.writepayload, channel->remotechan);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
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diff changeset
438 channel->sent_eof = 1;
4
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parents:
diff changeset
439
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
440 TRACE(("leave send_msg_channel_eof"))
4
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parents:
diff changeset
441 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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diff changeset
442
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
443 /* Called to write data out to the local side of the channel.
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 * Only called when we know we can write to a channel, writes as much as
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diff changeset
445 * possible */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
446 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447
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parents:
diff changeset
448 int len, maxlen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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449
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
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diff changeset
450 TRACE(("enter writechannel fd %d", fd))
4
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451
107
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diff changeset
452 maxlen = cbuf_readlen(cbuf);
4
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453
107
Matt Johnston <matt@ucc.asn.au>
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diff changeset
454 /* Write the data out */
108
10f4d3319780 - added circular buffering for channels
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parents: 107
diff changeset
455 len = write(fd, cbuf_readptr(cbuf, maxlen), maxlen);
4
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456 if (len <= 0) {
375
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Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
457 TRACE(("errno %d len %d", errno, len))
4
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parents:
diff changeset
458 if (len < 0 && errno != EINTR) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
459 close_chan_fd(channel, fd, SHUT_WR);
4
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460 }
165
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
461 TRACE(("leave writechannel: len <= 0"))
4
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462 return;
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463 }
375
8d149b812669 - Add some extra tracing.
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diff changeset
464 TRACE(("writechannel wrote %d", len))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
465
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
466 cbuf_incrread(cbuf, len);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
467 channel->recvdonelen += len;
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
468
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
469 /* Window adjust handling */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
470 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
471 /* Set it back to max window */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
472 send_msg_channel_window_adjust(channel, channel->recvdonelen);
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
473 channel->recvwindow += channel->recvdonelen;
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
474 channel->recvdonelen = 0;
4
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475 }
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
476
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
477 dropbear_assert(channel->recvwindow <= opts.recv_window);
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
478 dropbear_assert(channel->recvwindow <= cbuf_getavail(channel->writebuf));
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
479 dropbear_assert(channel->extrabuf == NULL ||
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
480 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
481
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
482 TRACE(("leave writechannel"))
4
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Matt Johnston <matt@ucc.asn.au>
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483 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485 /* Set the file descriptors for the main select in session.c
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 * This avoid channels which don't have any window available, are closed, etc*/
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
487 void setchannelfds(fd_set *readfds, fd_set *writefds) {
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492 for (i = 0; i < ses.chansize; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
494 channel = ses.channels[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 continue;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
499 /* Stuff to put over the wire.
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
500 Avoid queueing data to send if we're in the middle of a
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
501 key re-exchange (!dataallowed), but still read from the
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
502 FD if there's the possibility of "~."" to kill an
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
503 interactive session (the read_mangler) */
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
504 if (channel->transwindow > 0
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
505 && (ses.dataallowed || channel->read_mangler)) {
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
507 if (channel->readfd >= 0) {
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
508 FD_SET(channel->readfd, readfds);
4
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parents:
diff changeset
509 }
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
510
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
511 if (ERRFD_IS_READ(channel) && channel->errfd >= 0) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
512 FD_SET(channel->errfd, readfds);
4
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parents:
diff changeset
513 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515
397
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
Matt Johnston <matt@ucc.asn.au>
parents: 396
diff changeset
516 /* Stuff from the wire */
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
517 if (channel->initconn
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
518 ||(channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0)) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
519 FD_SET(channel->writefd, writefds);
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
522 if (ERRFD_IS_WRITE(channel) && channel->errfd >= 0
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
523 && cbuf_getused(channel->extrabuf) > 0) {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
524 FD_SET(channel->errfd, writefds);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
525 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
526
4
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
527 } /* foreach channel */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
529 #ifdef USING_LISTENERS
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
530 set_listener_fds(readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 /* handle the channel EOF event, by closing the channel filedescriptor. The
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536 * channel isn't closed yet, it is left until the incoming (from the program
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 * etc) FD is also EOF */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 void recv_msg_channel_eof() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541
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
542 TRACE(("enter recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
544 channel = getchannel_msg("EOF");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
546 channel->recv_eof = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
548 check_close(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
549 TRACE(("leave recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553 /* Handle channel closure(), respond in kind and close the channels */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554 void recv_msg_channel_close() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
555
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557
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
558 TRACE(("enter recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
560 channel = getchannel_msg("Close");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
562 channel->recv_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
563 channel->recv_close = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
565 check_close(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
566 TRACE(("leave recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 /* 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
570 * channel close */
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
571 static void remove_channel(struct Channel * channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
573 TRACE(("enter remove_channel"))
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
574 TRACE(("channel index is %d", channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
576 cbuf_free(channel->writebuf);
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
577 channel->writebuf = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
579 if (channel->extrabuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
580 cbuf_free(channel->extrabuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
581 channel->extrabuf = NULL;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
582 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
583
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
584
938
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
585 if (IS_DROPBEAR_SERVER || (channel->writefd != STDOUT_FILENO)) {
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
586 /* close the FDs in case they haven't been done
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
587 * yet (they might have been shutdown etc) */
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
588 TRACE(("CLOSE writefd %d", channel->writefd))
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
589 close(channel->writefd);
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
590 TRACE(("CLOSE readfd %d", channel->readfd))
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
591 close(channel->readfd);
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
592 TRACE(("CLOSE errfd %d", channel->errfd))
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
593 close(channel->errfd);
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
594 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
595
770
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
596 if (!channel->close_handler_done
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
597 && channel->type->closehandler) {
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
598 channel->type->closehandler(channel);
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
599 channel->close_handler_done = 1;
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
600 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
602 ses.channels[channel->index] = NULL;
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
603 m_free(channel);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
604 ses.chancount--;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
605
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
606 update_channel_prio();
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
607
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
608 TRACE(("leave remove_channel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 /* 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
612 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 void recv_msg_channel_request() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
616
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
617 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618
652
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
619 TRACE(("enter recv_msg_channel_request %p", channel))
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
620
495
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
621 if (channel->sent_close) {
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
622 TRACE(("leave recv_msg_channel_request: already closed channel"))
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
623 return;
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
624 }
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
625
652
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
626 if (channel->type->reqhandler
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
627 && !channel->close_handler_done) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 } else {
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
630 int wantreply;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
631 buf_eatstring(ses.payload);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
632 wantreply = buf_getbool(ses.payload);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
633 if (wantreply) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
634 send_msg_channel_failure(channel);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
635 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
637
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
638 TRACE(("leave recv_msg_channel_request"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
640 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
642 /* 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
643 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 * 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
645 * 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
646 * exttype */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
647 static void send_msg_channel_data(struct Channel *channel, int isextended) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 int len;
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
650 size_t maxlen, size_pos;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 int fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
655 TRACE(("enter send_msg_channel_data"))
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
656 dropbear_assert(!channel->sent_close);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 } else {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
661 fd = channel->readfd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
662 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
663 TRACE(("enter send_msg_channel_data isextended %d fd %d", isextended, fd))
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
664 dropbear_assert(fd >= 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
667 /* -(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
668 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
669 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 ses.writepayload->size - 1 - 4 - 4 - (isextended ? 4 : 0));
770
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
671 TRACE(("maxlen %zd", maxlen))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672 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
673 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
674 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
677 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 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
679 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
680 if (isextended) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
681 buf_putint(ses.writepayload, SSH_EXTENDED_DATA_STDERR);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
682 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
683 /* a dummy size first ...*/
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
684 size_pos = ses.writepayload->pos;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
685 buf_putint(ses.writepayload, 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
686
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
687 /* read the data */
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
688 len = read(fd, buf_getwriteptr(ses.writepayload, maxlen), maxlen);
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
689
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
690 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
691 if (len == 0 || errno != EINTR) {
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
692 /* This will also get hit in the case of EAGAIN. The only
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
693 time we expect to receive EAGAIN is when we're flushing a FD,
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
694 in which case it can be treated the same as EOF */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
695 close_chan_fd(channel, fd, SHUT_RD);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
696 }
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
697 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
698 buf_setlen(ses.writepayload, 0);
423
b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched.
Matt Johnston <matt@ucc.asn.au>
parents: 416
diff changeset
699 TRACE(("leave send_msg_channel_data: len %d read err %d or EOF for fd %d",
b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched.
Matt Johnston <matt@ucc.asn.au>
parents: 416
diff changeset
700 len, errno, fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
701 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
702 }
673
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 652
diff changeset
703
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
704 if (channel->read_mangler) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
705 channel->read_mangler(channel, buf_getwriteptr(ses.writepayload, len), &len);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
706 if (len == 0) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
707 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
708 buf_setlen(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
709 return;
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
710 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
711 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
712
673
c519b78b6d1a - Don't sent SSH_MSG_UNIMPLEMENTED if we don't have ENABLE_SVR_REMOTETCPFWD
Matt Johnston <matt@ucc.asn.au>
parents: 652
diff changeset
713 TRACE(("send_msg_channel_data: len %d fd %d", len, fd))
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
714 buf_incrwritepos(ses.writepayload, len);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
715 /* ... real size here */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
716 buf_setpos(ses.writepayload, size_pos);
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
717 buf_putint(ses.writepayload, len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
718
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
719 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
720
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
721 encrypt_packet();
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
722
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
723 /* If we receive less data than we requested when flushing, we've
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
724 reached the equivalent of EOF */
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
725 if (channel->flushing && len < (ssize_t)maxlen)
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
726 {
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
727 TRACE(("closing from channel, flushing out."))
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
728 close_chan_fd(channel, fd, SHUT_RD);
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
729 }
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
730 TRACE(("leave send_msg_channel_data"))
4
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
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
733 /* We receive channel data */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
734 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
735
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
736 struct Channel *channel;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
738 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
739
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
740 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
741 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
742
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
743 /* 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
744 * for writing to the local file descriptor */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
745 void common_recv_msg_channel_data(struct Channel *channel, int fd,
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
746 circbuffer * cbuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
747
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
748 unsigned int datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
749 unsigned int maxdata;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
750 unsigned int buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
751 unsigned int len;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
752
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
753 TRACE(("enter recv_msg_channel_data"))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
754
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
755 if (channel->recv_eof) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
756 dropbear_exit("Received data after eof");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
757 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
758
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
759 if (fd < 0 || !cbuf) {
365
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
760 /* If we have encountered failed write, the far side might still
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
761 * be sending data without having yet received our close notification.
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
762 * We just drop the data. */
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
763 return;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
764 }
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 datalen = buf_getint(ses.payload);
365
49fcc9875045 Remove accidentally removed block (making sure to close the channel).
Matt Johnston <matt@ucc.asn.au>
parents: 364
diff changeset
767 TRACE(("length %d", datalen))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
768
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
769 maxdata = cbuf_getavail(cbuf);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
770
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
771 /* 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
772 * 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
773 * just die horribly */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774 if (datalen > maxdata) {
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
775 dropbear_exit("Oversized packet");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
777
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
778 /* We may have to run throught twice, if the buffer wraps around. Can't
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
779 * just "leave it for next time" like with writechannel, since this
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
780 * is payload data */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
781 len = datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
782 while (len > 0) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
783 buflen = cbuf_writelen(cbuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
784 buflen = MIN(buflen, len);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
785
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
786 memcpy(cbuf_writeptr(cbuf, buflen),
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
787 buf_getptr(ses.payload, buflen), buflen);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
788 cbuf_incrwrite(cbuf, buflen);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
789 buf_incrpos(ses.payload, buflen);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
790 len -= buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
791 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792
241
c5d3ef11155f * use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents: 221
diff changeset
793 dropbear_assert(channel->recvwindow >= datalen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 channel->recvwindow -= datalen;
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
795 dropbear_assert(channel->recvwindow <= opts.recv_window);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
796
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
797 TRACE(("leave recv_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
798 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
799
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
800 /* 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
801 * 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
802 * 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
803 void recv_msg_channel_window_adjust() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
804
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
808 channel = getchannel();
4
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 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
811 TRACE(("received window increment %d", incr))
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
812 incr = MIN(incr, TRANS_MAX_WIN_INCR);
4
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 channel->transwindow += incr;
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
815 channel->transwindow = MIN(channel->transwindow, TRANS_MAX_WINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
816
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
819 /* 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
820 * end know */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
821 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
822 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
823
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
824 TRACE(("sending window adjust %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
825 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827 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
828 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
829 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
830
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
831 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
832 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
833
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
834 /* 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
835 void recv_msg_channel_open() {
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 unsigned char *type;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
838 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
839 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
840 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
841 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
842 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
844 int ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
845
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
846
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
847 TRACE(("enter recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
848
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
849 /* get the packet contents */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850 type = buf_getstring(ses.payload, &typelen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
852 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853 transwindow = buf_getint(ses.payload);
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
854 transwindow = MIN(transwindow, TRANS_MAX_WINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 transmaxpacket = buf_getint(ses.payload);
448
9c61e7af0156 Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents: 439
diff changeset
856 transmaxpacket = MIN(transmaxpacket, TRANS_MAX_PAYLOAD_LEN);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
857
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
858 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
859 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
860 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
861 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
862
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
863 /* 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
864 * 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
865 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
866 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
867 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
868 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
869 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
870 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 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
875 TRACE(("No matching type for '%s'", type))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
878
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
879 TRACE(("matched type '%s'", type))
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
880
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
883
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884 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
885 TRACE(("newchannel returned NULL"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
886 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
888
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
889 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890 ret = channel->type->inithandler(channel);
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
891 if (ret == SSH_OPEN_IN_PROGRESS) {
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
892 /* We'll send the confirmation later */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
893 goto cleanup;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
894 }
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
895 if (ret > 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 errtype = ret;
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
897 remove_channel(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
898 TRACE(("inithandler returned failure %d", ret))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
899 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
900 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
901 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
902
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
903 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
904 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
905 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
906
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
907 chan_initwritebuf(channel);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
908
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
909 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
910 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
911 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
912 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
914 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
915 TRACE(("recv_msg_channel_open failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
916 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
919 m_free(type);
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
920
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
921 update_channel_prio();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
922
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
923 TRACE(("leave recv_msg_channel_open"))
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
926 /* Send a failure message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
927 void send_msg_channel_failure(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928
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
929 TRACE(("enter send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
930 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
931
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
933 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
934
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
935 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
936 TRACE(("leave send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
937 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
938
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
939 /* Send a success message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
940 void send_msg_channel_success(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
941
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
942 TRACE(("enter send_msg_channel_success"))
4
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_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
946 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
947
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
948 encrypt_packet();
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
949 TRACE(("leave send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
950 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
951
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
952 /* 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
953 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
954 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
955 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
956
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
957 TRACE(("enter send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
958 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
959
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
960 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
961 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
962 buf_putint(ses.writepayload, reason);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
963 buf_putstring(ses.writepayload, text, strlen((char*)text));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
964 buf_putstring(ses.writepayload, lang, strlen((char*)lang));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
965
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
966 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
967 TRACE(("leave send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
968 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
969
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
970 /* 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
971 * allocated and the receive parameters */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
972 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
973 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
974 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
975
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
976 TRACE(("enter send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
977 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
978
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
979 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
980 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
981 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
982 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
983 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
984
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
985 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
986 TRACE(("leave send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
987 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
988
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
989 /* close a fd, how is SHUT_RD or SHUT_WR */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
990 static void close_chan_fd(struct Channel *channel, int fd, int how) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
991
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
992 int closein = 0, closeout = 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
993
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
994 if (channel->type->sepfds) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
995 TRACE(("SHUTDOWN(%d, %d)", fd, how))
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
996 shutdown(fd, how);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
997 if (how == 0) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
998 closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
999 } else {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1000 closein = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1001 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1002 } else {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1003 TRACE(("CLOSE some fd %d", fd))
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1004 close(fd);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1005 closein = closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1006 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1007
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1008 if (closeout && (fd == channel->readfd)) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1009 channel->readfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1010 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1011 if (closeout && ERRFD_IS_READ(channel) && (fd == channel->errfd)) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1012 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1013 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1014
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1015 if (closein && fd == channel->writefd) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1016 channel->writefd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1017 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1018 if (closein && ERRFD_IS_WRITE(channel) && (fd == channel->errfd)) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1019 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1020 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1021
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1022 /* if we called shutdown on it and all references are gone, then we
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1023 * need to close() it to stop it lingering */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1024 if (channel->type->sepfds && channel->readfd == FD_CLOSED
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1025 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1026 TRACE(("CLOSE (finally) of %d", fd))
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1027 close(fd);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1028 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1029 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1030
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1031
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
1032 #if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1033 /* 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
1034 * 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
1035 * 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
1036 * completion. It is mandatory for the caller to encrypt_packet() if
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1037 * a channel is returned. NULL is returned on failure. */
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
1038 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
1039
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1040 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1041
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
1042 TRACE(("enter send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1043 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1044 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
1045 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
1046 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1047 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1048
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1049 /* Outbound opened channels don't make use of in-progress connections,
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1050 * we can set it up straight away */
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1051 chan_initwritebuf(chan);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1052
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1053 /* set fd non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
1054 setnonblocking(fd);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1055
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1056 chan->writefd = chan->readfd = fd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1057 ses.maxfd = MAX(ses.maxfd, fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1058
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1059 chan->await_open = 1;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1060
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1061 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1062 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1063
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1064 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
1065 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
1066 buf_putint(ses.writepayload, chan->index);
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
1067 buf_putint(ses.writepayload, opts.recv_window);
906
4696755c4cac A few fixes for cases where compression increases payload sizes, and
Matt Johnston <matt@ucc.asn.au>
parents: 896
diff changeset
1068 buf_putint(ses.writepayload, RECV_MAX_CHANNEL_DATA_LEN);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1069
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
1070 TRACE(("leave send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1071 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1072 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1073
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1074 /* 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
1075 * successful*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1076 void recv_msg_channel_open_confirmation() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1077
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1078 struct Channel * channel;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1079 int ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1080
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
1081 TRACE(("enter recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1082
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1083 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1084
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1085 if (!channel->await_open) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
1086 dropbear_exit("Unexpected channel reply");
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1087 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1088 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1089
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1090 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1091 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1092 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
1093
187
c44df7123b0a compile fix when TRACE debugging is enabled
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
1094 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
1095 channel->remotechan, channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1096
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1097 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1098 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1099 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1100 if (ret > 0) {
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1101 remove_channel(channel);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
1102 TRACE(("inithandler returned failure %d", ret))
944
2e402a09e21e Avoid use-after-free when channel inithandler fails. Thanks to Coverity
Matt Johnston <matt@ucc.asn.au>
parents: 941
diff changeset
1103 return;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1104 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1105 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1106
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1107 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1108 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1109 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1110 update_channel_prio();
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
1111
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
1112 TRACE(("leave recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1113 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1114
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1115 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1116 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1117
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1118 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1119
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1120 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1121
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1122 if (!channel->await_open) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
1123 dropbear_exit("Unexpected channel reply");
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1124 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1125 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1126
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1127 remove_channel(channel);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1128 }
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
1129 #endif /* USING_LISTENERS */
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1130
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1131 void send_msg_request_success() {
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1132 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1133 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_SUCCESS);
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1134 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1135 }
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1136
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1137 void send_msg_request_failure() {
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1138 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1139 buf_putbyte(ses.writepayload, SSH_MSG_REQUEST_FAILURE);
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1140 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1141 }
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1142
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1143 struct Channel* get_any_ready_channel() {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1144 if (ses.chancount == 0) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1145 return NULL;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1146 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1147 size_t i;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1148 for (i = 0; i < ses.chansize; i++) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1149 struct Channel *chan = ses.channels[i];
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1150 if (chan
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1151 && !(chan->sent_eof || chan->recv_eof)
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1152 && !(chan->await_open || chan->initconn)) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1153 return chan;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1154 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1155 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1156 return NULL;
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1157 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1158
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1159 void start_send_channel_request(struct Channel *channel,
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1160 unsigned char *type) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1161
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1162 CHECKCLEARTOWRITE();
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1163 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1164 buf_putint(ses.writepayload, channel->remotechan);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1165
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1166 buf_putstring(ses.writepayload, type, strlen(type));
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1167
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1168 }