Mercurial > dropbear

annotate common-channel.c @ 1829:a7cc3332d8ab

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Replace ChanType.sepfds with Channel.bidir_fd This handles the case where a svrchansess has separate FDs for nopty, but a single FD for pty mode. The use of sepfds was also previously incorrect for X11 and agent forwarding
author Matt Johnston <matt@ucc.asn.au>
date Mon, 11 Oct 2021 15:42:14 +0800
parents 3f0ac6bc58a1
children 90ac15aeac43
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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 "listener.h"
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36 #include "runopts.h"
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37 #include "netio.h"
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39 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
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40 const char *text, const char *lang);
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41 static void send_msg_channel_open_confirmation(const 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 int writechannel(struct Channel* channel, int fd, circbuffer *cbuf,
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45 const unsigned char *moredata, unsigned int *morelen);
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46 static void send_msg_channel_window_adjust(const struct Channel *channel,
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47 unsigned int incr);
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48 static void send_msg_channel_data(struct Channel *channel, int isextended);
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49 static void send_msg_channel_eof(struct Channel *channel);
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50 static void send_msg_channel_close(struct Channel *channel);
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51 static void remove_channel(struct Channel *channel);
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52 static unsigned int write_pending(const 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 #if DROPBEAR_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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88
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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 /* Create a new channel entry, send a reply confirm or failure */
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103 /* If remotechan, transwindow and transmaxpacket are not know (for a new
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104 * outgoing connection, with them to be filled on confirmation), they should
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105 * all be set to 0 */
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106 static struct Channel* newchannel(unsigned int remotechan,
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107 const struct ChanType *type,
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108 unsigned int transwindow, unsigned int transmaxpacket) {
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110 struct Channel * newchan;
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111 unsigned int i, j;
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112
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113 TRACE(("enter newchannel"))
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115 /* first see if we can use existing channels */
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116 for (i = 0; i < ses.chansize; i++) {
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117 if (ses.channels[i] == NULL) {
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118 break;
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119 }
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120 }
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122 /* otherwise extend the list */
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123 if (i == ses.chansize) {
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124 if (ses.chansize >= MAX_CHANNELS) {
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125 TRACE(("leave newchannel: max chans reached"))
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126 return NULL;
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127 }
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128
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129 /* extend the channels */
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130 ses.channels = (struct Channel**)m_realloc(ses.channels,
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131 (ses.chansize+CHAN_EXTEND_SIZE)*sizeof(struct Channel*));
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132
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133 ses.chansize += CHAN_EXTEND_SIZE;
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134
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135 /* set the new channels to null */
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136 for (j = i; j < ses.chansize; j++) {
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137 ses.channels[j] = NULL;
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138 }
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140 }
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141
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142 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
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143 newchan->type = type;
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144 newchan->index = i;
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145 newchan->sent_close = newchan->recv_close = 0;
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146 newchan->sent_eof = newchan->recv_eof = 0;
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147
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148 newchan->remotechan = remotechan;
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149 newchan->transwindow = transwindow;
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150 newchan->transmaxpacket = transmaxpacket;
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151
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152 newchan->typedata = NULL;
253
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153 newchan->writefd = FD_UNINIT;
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154 newchan->readfd = FD_UNINIT;
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155 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
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156 newchan->await_open = 0;
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157
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158 newchan->writebuf = cbuf_new(opts.recv_window);
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159 newchan->recvwindow = opts.recv_window;
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160
107
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161 newchan->extrabuf = NULL; /* The user code can set it up */
108
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162 newchan->recvdonelen = 0;
906
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163 newchan->recvmaxpacket = RECV_MAX_CHANNEL_DATA_LEN;
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164
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165 newchan->prio = DROPBEAR_CHANNEL_PRIO_EARLY; /* inithandler sets it */
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166
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167 ses.channels[i] = newchan;
37
0913e2ee3545 we're nearly there yet
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168 ses.chancount++;
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169
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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170 TRACE(("leave newchannel"))
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171
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172 return newchan;
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173 }
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174
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
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175 /* Returns the channel structure corresponding to the channel in the current
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176 * data packet (ses.payload must be positioned appropriately).
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177 * A valid channel is always returns, it will fail fatally with an unknown
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178 * channel */
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179 static struct Channel* getchannel_msg(const char* kind) {
179
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180
161557a9dde8 * fix longstanding bug with connections being closed on failure to
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181 unsigned int chan;
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182
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183 chan = buf_getint(ses.payload);
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184 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
362
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185 if (kind) {
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186 dropbear_exit("%s for unknown channel %d", kind, chan);
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187 } else {
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188 dropbear_exit("Unknown channel %d", chan);
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189 }
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190 }
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191 return ses.channels[chan];
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192 }
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193
362
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194 struct Channel* getchannel() {
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195 return getchannel_msg(NULL);
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196 }
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197
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198 /* Iterate through the channels, performing IO if available */
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199 void channelio(const fd_set *readfds, const fd_set *writefds) {
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200
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201 /* Listeners such as TCP, X11, agent-auth */
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202 struct Channel *channel;
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203 unsigned int i;
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204
363
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205 /* foreach channel */
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206 for (i = 0; i < ses.chansize; i++) {
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207 /* Close checking only needs to occur for channels that had IO events */
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208 int do_check_close = 0;
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209
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210 channel = ses.channels[i];
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211 if (channel == NULL) {
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212 /* only process in-use channels */
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213 continue;
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214 }
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215
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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216 /* read data and send it over the wire */
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217 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
416
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218 TRACE(("send normal readfd"))
363
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219 send_msg_channel_data(channel, 0);
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220 do_check_close = 1;
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221 }
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222
253
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223 /* read stderr data and send it over the wire */
416
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224 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
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diff changeset
225 && FD_ISSET(channel->errfd, readfds)) {
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226 TRACE(("send normal errfd"))
363
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diff changeset
227 send_msg_channel_data(channel, 1);
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diff changeset
228 do_check_close = 1;
395
dc37bd8563e8 disapproval of revision '5fdf69ca60d1683cdd9f4c2595134bed26394834'
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parents: 394
diff changeset
229 }
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diff changeset
230
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231 /* write to program/pipe stdin */
253
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parents: 243
diff changeset
232 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
1054
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parents: 1049
diff changeset
233 writechannel(channel, channel->writefd, channel->writebuf, NULL, NULL);
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diff changeset
234 do_check_close = 1;
108
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diff changeset
235 }
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236
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diff changeset
237 /* stderr for client mode */
375
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parents: 365
diff changeset
238 if (ERRFD_IS_WRITE(channel)
253
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parents: 243
diff changeset
239 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
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diff changeset
240 writechannel(channel, channel->errfd, channel->extrabuf, NULL, NULL);
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diff changeset
241 do_check_close = 1;
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242 }
955
36eacc322e00 Make sure the check_close() handler runs when a server child process exits
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diff changeset
243
36eacc322e00 Make sure the check_close() handler runs when a server child process exits
Matt Johnston <matt@ucc.asn.au>
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diff changeset
244 if (ses.channel_signal_pending) {
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
245 /* SIGCHLD can change channel state for server sessions */
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diff changeset
246 do_check_close = 1;
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247 }
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248
363
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249 /* handle any channel closing etc */
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diff changeset
250 if (do_check_close) {
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diff changeset
251 check_close(channel);
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252 }
363
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253 }
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254
1295
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diff changeset
255 #if DROPBEAR_LISTENERS
253
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diff changeset
256 handle_listeners(readfds);
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257 #endif
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258 }
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259
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260
363
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diff changeset
261 /* Returns true if there is data remaining to be written to stdin or
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diff changeset
262 * stderr of a channel's endpoint. */
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parents: 1325
diff changeset
263 static unsigned int write_pending(const struct Channel * channel) {
4
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264
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
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diff changeset
265 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
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diff changeset
266 return 1;
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diff changeset
267 } else if (channel->errfd >= 0 && channel->extrabuf &&
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diff changeset
268 cbuf_getused(channel->extrabuf) > 0) {
363
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diff changeset
269 return 1;
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diff changeset
270 }
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diff changeset
271 return 0;
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diff changeset
272 }
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273
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274
359
78518751cb82 just shuffle some variables names about, a brief comment
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diff changeset
275 /* EOF/close handling */
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diff changeset
276 static void check_close(struct Channel *channel) {
467
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diff changeset
277 int close_allowed = 0;
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278
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279 TRACE2(("check_close: writefd %d, readfd %d, errfd %d, sent_close %d, recv_close %d",
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diff changeset
280 channel->writefd, channel->readfd,
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diff changeset
281 channel->errfd, channel->sent_close, channel->recv_close))
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282 TRACE2(("writebuf size %d extrabuf size %d",
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283 channel->writebuf ? cbuf_getused(channel->writebuf) : 0,
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diff changeset
284 channel->extrabuf ? cbuf_getused(channel->extrabuf) : 0))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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parents: 108
diff changeset
285
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286 /* if a type-specific check_close is defined we will only exit
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287 once that has been triggered. this is only used for a server "session"
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288 channel, to ensure that the shell has exited (and the exit status
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289 retrieved) before we close things up. */
467
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290 if (!channel->type->check_close
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291 || channel->sent_close
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diff changeset
292 || channel->type->check_close(channel)) {
467
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293 close_allowed = 1;
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294 }
416
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295
467
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296 if (channel->recv_close && !write_pending(channel) && close_allowed) {
416
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diff changeset
297 if (!channel->sent_close) {
165
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298 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
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299 send_msg_channel_close(channel);
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300 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
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301 remove_channel(channel);
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diff changeset
302 return;
397
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303 }
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304
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305 if ((channel->recv_eof && !write_pending(channel))
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306 /* have a server "session" and child has exited */
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307 || (channel->type->check_close && close_allowed)) {
364
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308 close_chan_fd(channel, channel->writefd, SHUT_WR);
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309 }
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310
375
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311 /* If we're not going to send any more data, send EOF */
359
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312 if (!channel->sent_eof
365
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313 && channel->readfd == FD_CLOSED
375
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314 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)) {
397
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315 send_msg_channel_eof(channel);
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316 }
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317
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318 /* And if we can't receive any more data from them either, close up */
467
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319 if (channel->readfd == FD_CLOSED
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320 && channel->writefd == FD_CLOSED
423
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321 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)
467
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322 && !channel->sent_close
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323 && close_allowed
416
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parents: 415
diff changeset
324 && !write_pending(channel)) {
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diff changeset
325 TRACE(("sending close, readfd is closed"))
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326 send_msg_channel_close(channel);
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327 }
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328 }
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329
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330 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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331 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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332 * it is important that the channel reference isn't used after a call to this
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333 * function */
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334 void channel_connect_done(int result, int sock, void* user_data, const char* errstring) {
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335 struct Channel *channel = user_data;
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336
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337 TRACE(("enter channel_connect_done"))
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338
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339 if (result == DROPBEAR_SUCCESS)
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340 {
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341 channel->readfd = channel->writefd = sock;
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342 channel->bidir_fd = 1;
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343 channel->conn_pending = NULL;
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344 send_msg_channel_open_confirmation(channel, channel->recvwindow,
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345 channel->recvmaxpacket);
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346 TRACE(("leave channel_connect_done: success"))
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347 }
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348 else
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349 {
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350 send_msg_channel_open_failure(channel->remotechan,
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351 SSH_OPEN_CONNECT_FAILED, errstring, "");
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352 remove_channel(channel);
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353 TRACE(("leave check_in_progress: fail. internal errstring: %s", errstring))
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354 }
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355 }
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356
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357
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358 /* Send the close message and set the channel as closed */
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359 static void send_msg_channel_close(struct Channel *channel) {
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360
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361 TRACE(("enter send_msg_channel_close %p", (void*)channel))
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362 if (channel->type->closehandler) {
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363 channel->type->closehandler(channel);
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364 }
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365
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366 CHECKCLEARTOWRITE();
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367
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368 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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369 buf_putint(ses.writepayload, channel->remotechan);
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370
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371 encrypt_packet();
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372
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373 channel->sent_eof = 1;
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374 channel->sent_close = 1;
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375 close_chan_fd(channel, channel->readfd, SHUT_RD);
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376 close_chan_fd(channel, channel->errfd, SHUT_RDWR);
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377 close_chan_fd(channel, channel->writefd, SHUT_WR);
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378 TRACE(("leave send_msg_channel_close"))
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379 }
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380
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381 /* call this when trans/eof channels are closed */
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382 static void send_msg_channel_eof(struct Channel *channel) {
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383
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384 TRACE(("enter send_msg_channel_eof"))
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385 CHECKCLEARTOWRITE();
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386
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387 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
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388 buf_putint(ses.writepayload, channel->remotechan);
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389
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390 encrypt_packet();
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391
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392 channel->sent_eof = 1;
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393
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394 TRACE(("leave send_msg_channel_eof"))
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395 }
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396
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397 #ifndef HAVE_WRITEV
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398 static int writechannel_fallback(struct Channel* channel, int fd, circbuffer *cbuf,
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diff changeset
399 const unsigned char *UNUSED(moredata), unsigned int *morelen) {
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diff changeset
400
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diff changeset
401 unsigned char *circ_p1, *circ_p2;
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diff changeset
402 unsigned int circ_len1, circ_len2;
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diff changeset
403 ssize_t written;
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diff changeset
404
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diff changeset
405 if (morelen) {
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diff changeset
406 /* fallback doesn't consume moredata */
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diff changeset
407 *morelen = 0;
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408 }
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diff changeset
409
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410 /* Write the first portion of the circular buffer */
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411 cbuf_readptrs(cbuf, &circ_p1, &circ_len1, &circ_p2, &circ_len2);
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412 written = write(fd, circ_p1, circ_len1);
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diff changeset
413 if (written < 0) {
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diff changeset
414 if (errno != EINTR && errno != EAGAIN) {
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diff changeset
415 TRACE(("channel IO write error fd %d %s", fd, strerror(errno)))
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416 close_chan_fd(channel, fd, SHUT_WR);
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417 return DROPBEAR_FAILURE;
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418 }
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419 } else {
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420 cbuf_incrread(cbuf, written);
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421 channel->recvdonelen += written;
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diff changeset
422 }
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423 return DROPBEAR_SUCCESS;
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424 }
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diff changeset
425 #endif /* !HAVE_WRITEV */
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diff changeset
426
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diff changeset
427 #ifdef HAVE_WRITEV
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parents: 1166
diff changeset
428 static int writechannel_writev(struct Channel* channel, int fd, circbuffer *cbuf,
1054
c71df09bc610 Avoid copying data into circular buffer
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diff changeset
429 const unsigned char *moredata, unsigned int *morelen) {
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
430
1054
c71df09bc610 Avoid copying data into circular buffer
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parents: 1049
diff changeset
431 struct iovec iov[3];
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
432 unsigned char *circ_p1, *circ_p2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
433 unsigned int circ_len1, circ_len2;
c71df09bc610 Avoid copying data into circular buffer
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parents: 1049
diff changeset
434 int io_count = 0;
1192
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
435
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
436 ssize_t written;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
438 cbuf_readptrs(cbuf, &circ_p1, &circ_len1, &circ_p2, &circ_len2);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
439
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
440 if (circ_len1 > 0) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
441 TRACE(("circ1 %d", circ_len1))
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
442 iov[io_count].iov_base = circ_p1;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
443 iov[io_count].iov_len = circ_len1;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
444 io_count++;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
445 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
446
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
447 if (circ_len2 > 0) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
448 TRACE(("circ2 %d", circ_len2))
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
449 iov[io_count].iov_base = circ_p2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
450 iov[io_count].iov_len = circ_len2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
451 io_count++;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
452 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
453
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
454 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
455 assert(moredata);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
456 TRACE(("more %d", *morelen))
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
457 iov[io_count].iov_base = (void*)moredata;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
458 iov[io_count].iov_len = *morelen;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
459 io_count++;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
460 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
461
1075
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
462 if (io_count == 0) {
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
463 /* writechannel may sometimes be called twice in a main loop iteration.
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
464 From common_recv_msg_channel_data() then channelio().
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
465 The second call may not have any data to write, so we just return. */
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
466 TRACE(("leave writechannel, no data"))
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
467 return DROPBEAR_SUCCESS;
1075
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
468 }
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
469
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
470 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
471 /* Default return value, none consumed */
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
472 *morelen = 0;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
473 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
474
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
475 written = writev(fd, iov, io_count);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
476
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
477 if (written < 0) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
478 if (errno != EINTR && errno != EAGAIN) {
1075
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
479 TRACE(("channel IO write error fd %d %s", fd, strerror(errno)))
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
480 close_chan_fd(channel, fd, SHUT_WR);
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
481 return DROPBEAR_FAILURE;
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
482 }
1192
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
483 } else {
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
484 int cbuf_written = MIN(circ_len1+circ_len2, (unsigned int)written);
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
485 cbuf_incrread(cbuf, cbuf_written);
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
486 if (morelen) {
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
487 *morelen = written - cbuf_written;
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
488 }
af940cefdba1 Fix "Avoid queueing into circbuffer when the channel is about to close"
Matt Johnston <matt@ucc.asn.au>
parents: 1191
diff changeset
489 channel->recvdonelen += written;
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
490 }
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
491 return DROPBEAR_SUCCESS;
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
492 }
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
493 #endif /* HAVE_WRITEV */
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
495 /* Called to write data out to the local side of the channel.
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
496 Writes the circular buffer contents and also the "moredata" buffer
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
497 if not null. Will ignore EAGAIN.
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
498 Returns DROPBEAR_FAILURE if writing to fd had an error and the channel is being closed, DROPBEAR_SUCCESS otherwise */
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
499 static int writechannel(struct Channel* channel, int fd, circbuffer *cbuf,
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
500 const unsigned char *moredata, unsigned int *morelen) {
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
501 int ret = DROPBEAR_SUCCESS;
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
502 TRACE(("enter writechannel fd %d", fd))
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
503 #ifdef HAVE_WRITEV
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
504 ret = writechannel_writev(channel, fd, cbuf, moredata, morelen);
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
505 #else
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
506 ret = writechannel_fallback(channel, fd, cbuf, moredata, morelen);
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
507 #endif
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
508
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
509 /* Window adjust handling */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
510 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
511 send_msg_channel_window_adjust(channel, channel->recvdonelen);
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
512 channel->recvwindow += channel->recvdonelen;
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
513 channel->recvdonelen = 0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 }
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
515
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
516 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
517 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
518 dropbear_assert(channel->extrabuf == NULL ||
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
519 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
520
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
521 TRACE(("leave writechannel"))
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
522 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1075
diff changeset
525
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526 /* 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
527 * This avoid channels which don't have any window available, are closed, etc*/
1074
10f198d4a308 Make main socket nonblocking. Limit writequeue size.
Matt Johnston <matt@ucc.asn.au>
parents: 1072
diff changeset
528 void setchannelfds(fd_set *readfds, fd_set *writefds, int allow_reads) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 struct Channel * channel;
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 for (i = 0; i < ses.chansize; i++) {
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 channel = ses.channels[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 continue;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
540 /* 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
541 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
542 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
543 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
544 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
545 if (channel->transwindow > 0
1074
10f198d4a308 Make main socket nonblocking. Limit writequeue size.
Matt Johnston <matt@ucc.asn.au>
parents: 1072
diff changeset
546 && ((ses.dataallowed && allow_reads) || channel->read_mangler)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
548 if (channel->readfd >= 0) {
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
549 FD_SET(channel->readfd, readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 }
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
551
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
552 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
553 FD_SET(channel->errfd, readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554 }
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
397
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
Matt Johnston <matt@ucc.asn.au>
parents: 396
diff changeset
557 /* Stuff from the wire */
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
558 if (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
559 FD_SET(channel->writefd, writefds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
562 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
563 && 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
564 FD_SET(channel->errfd, writefds);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
565 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
566
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567 } /* foreach channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1192
diff changeset
569 #if DROPBEAR_LISTENERS
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
570 set_listener_fds(readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 /* 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
576 * 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
577 * etc) FD is also EOF */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 void recv_msg_channel_eof() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581
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
582 TRACE(("enter recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
584 channel = getchannel_msg("EOF");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
586 channel->recv_eof = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
588 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
589 TRACE(("leave recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
590 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
592
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
593 /* 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
594 void recv_msg_channel_close() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
595
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
597
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
598 TRACE(("enter recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
599
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
600 channel = getchannel_msg("Close");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
602 channel->recv_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
603 channel->recv_close = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
604
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
605 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
606 TRACE(("leave recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
607 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
608
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609 /* 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
610 * channel close */
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
611 static void remove_channel(struct Channel * channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
613 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
614 TRACE(("channel index is %d", channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
616 cbuf_free(channel->writebuf);
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
617 channel->writebuf = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
619 if (channel->extrabuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
620 cbuf_free(channel->extrabuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
621 channel->extrabuf = NULL;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
622 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
623
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
624
938
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
625 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
626 /* 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
627 * 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
628 TRACE(("CLOSE writefd %d", channel->writefd))
1039
d0e6dd5af46e Use m_close() which will avoid close(-1)
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
629 m_close(channel->writefd);
938
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
630 TRACE(("CLOSE readfd %d", channel->readfd))
1039
d0e6dd5af46e Use m_close() which will avoid close(-1)
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
631 m_close(channel->readfd);
938
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
632 TRACE(("CLOSE errfd %d", channel->errfd))
1039
d0e6dd5af46e Use m_close() which will avoid close(-1)
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
633 m_close(channel->errfd);
938
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
634 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
635
1625
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
636 if (channel->type->cleanup) {
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
637 channel->type->cleanup(channel);
770
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
638 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
640 if (channel->conn_pending) {
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
641 cancel_connect(channel->conn_pending);
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
642 }
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
643
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
644 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
645 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
646 ses.chancount--;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
648 update_channel_prio();
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
649
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
650 TRACE(("leave remove_channel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 }
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 /* 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
654 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655 void recv_msg_channel_request() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
659 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 970
diff changeset
661 TRACE(("enter recv_msg_channel_request %p", (void*)channel))
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
662
1625
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
663 if (channel->type->reqhandler) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665 } 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
666 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
667 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
668 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
669 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
670 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
671 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
673
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
674 TRACE(("leave recv_msg_channel_request"))
4
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 /* 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
679 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
680 * 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
681 * 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
682 * exttype */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
683 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
684
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
685 int len;
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
686 size_t maxlen, size_pos;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
687 int fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
688
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
689 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
690
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
691 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
692 dropbear_assert(!channel->sent_close);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
693
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
694 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
695 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
696 } else {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
697 fd = channel->readfd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
698 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
699 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
700 dropbear_assert(fd >= 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
701
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
702 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
703 /* -(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
704 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
705 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
706 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
707 TRACE(("maxlen %zd", maxlen))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 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
709 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
710 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
711 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
712
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
713 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
714 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
715 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
716 if (isextended) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
717 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
718 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
719 /* 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
720 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
721 buf_putint(ses.writepayload, 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
722
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
723 /* 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
724 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
725
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
726 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
727 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
728 /* 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
729 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
730 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
731 close_chan_fd(channel, fd, SHUT_RD);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
732 }
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
733 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
734 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
735 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
736 len, errno, fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
738 }
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
739
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
740 if (channel->read_mangler) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
741 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
742 if (len == 0) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
743 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
744 buf_setlen(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
745 return;
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
746 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
747 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
748
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
749 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
750 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
751 /* ... real size here */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
752 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
753 buf_putint(ses.writepayload, len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
755 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
756
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
757 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
758 TRACE(("leave send_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
759 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
760
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
761 /* We receive channel data */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
762 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
764 struct Channel *channel;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
765
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
766 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
768 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
769 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
770
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
771 /* 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
772 * for writing to the local file descriptor */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
773 void common_recv_msg_channel_data(struct Channel *channel, int fd,
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
774 circbuffer * cbuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
775
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
776 unsigned int datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
777 unsigned int maxdata;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
778 unsigned int buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
779 unsigned int len;
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
780 unsigned int consumed;
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
781 int res;
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
782
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
783 TRACE(("enter recv_msg_channel_data"))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
784
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
785 if (channel->recv_eof) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
786 dropbear_exit("Received data after eof");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
789 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
790 /* 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
791 * 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
792 * 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
793 return;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
795
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
796 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
797 TRACE(("length %d", datalen))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
798
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
799 maxdata = cbuf_getavail(cbuf);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
800
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
801 /* 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
802 * 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
803 * just die horribly */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
804 if (datalen > maxdata) {
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
805 dropbear_exit("Oversized packet");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
808 dropbear_assert(channel->recvwindow >= datalen);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
809 channel->recvwindow -= datalen;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
810 dropbear_assert(channel->recvwindow <= opts.recv_window);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
811
1075
cc6116cc0b5c Avoid channel writev() when there is nothing to write
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
812 /* Attempt to write the data immediately without having to put it in the circular buffer */
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
813 consumed = datalen;
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
814 res = writechannel(channel, fd, cbuf, buf_getptr(ses.payload, datalen), &consumed);
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
815
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
816 datalen -= consumed;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
817 buf_incrpos(ses.payload, consumed);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
818
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
819
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
820 /* We may have to run throught twice, if the buffer wraps around. Can't
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
821 * just "leave it for next time" like with writechannel, since this
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
822 * is payload data.
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
823 * If the writechannel() failed then remaining data is discarded */
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
824 if (res == DROPBEAR_SUCCESS) {
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
825 len = datalen;
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
826 while (len > 0) {
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
827 buflen = cbuf_writelen(cbuf);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
828 buflen = MIN(buflen, len);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
829
1168
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
830 memcpy(cbuf_writeptr(cbuf, buflen),
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
831 buf_getptr(ses.payload, buflen), buflen);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
832 cbuf_incrwrite(cbuf, buflen);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
833 buf_incrpos(ses.payload, buflen);
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
834 len -= buflen;
509cf5df51c6 Avoid queueing into circbuffer when the channel is about to close
Matt Johnston <matt@ucc.asn.au>
parents: 1166
diff changeset
835 }
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
836 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
837
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
838 TRACE(("leave recv_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
839 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
840
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
841 /* 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
842 * 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
843 * 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
844 void recv_msg_channel_window_adjust() {
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 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
847 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
848
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
849 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851 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
852 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
853 incr = MIN(incr, TRANS_MAX_WIN_INCR);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 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
856 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
857
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
858 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
859
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
860 /* 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
861 * end know */
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1325
diff changeset
862 static void send_msg_channel_window_adjust(const struct Channel* channel,
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
863 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
864
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
865 TRACE(("sending window adjust %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
866 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
867
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 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
869 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
870 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875 /* 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
876 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877
1094
c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents: 1079
diff changeset
878 char *type;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
882 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
883 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
885 int ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
886
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887
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
888 TRACE(("enter recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
889
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890 /* get the packet contents */
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1098
diff changeset
891 type = buf_getstring(ses.payload, &typelen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
892
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
894 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
895 transwindow = MIN(transwindow, TRANS_MAX_WINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 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
897 transmaxpacket = MIN(transmaxpacket, TRANS_MAX_PAYLOAD_LEN);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
898
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
899 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
900 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
901 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
902 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
903
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
904 /* 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
905 * 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
906 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
907 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
908 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
909 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
910 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
911 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
912 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
914
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
915 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
916 TRACE(("No matching type for '%s'", type))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
919
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
920 TRACE(("matched type '%s'", type))
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
921
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
922 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
923 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
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 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
926 TRACE(("newchannel returned NULL"))
1166
b0f351edf370 Send SSH_OPEN_RESOURCE_SHORTAGE response when too many channels open
Matt Johnston <matt@ucc.asn.au>
parents: 1165
diff changeset
927 errtype = SSH_OPEN_RESOURCE_SHORTAGE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
929 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
930
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
931 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932 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
933 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
934 /* 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
935 goto cleanup;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
936 }
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
937 if (ret > 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
938 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
939 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
940 TRACE(("inithandler returned failure %d", ret))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
941 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
942 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
943 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
944
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
945 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
946 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
947 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
948
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
949 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
950 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
951 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
952 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
953
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
954 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
955 TRACE(("recv_msg_channel_open failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
956 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
957
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
958 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
959 m_free(type);
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
960
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
961 update_channel_prio();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
962
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
963 TRACE(("leave recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
964 }
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 /* Send a failure message */
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1325
diff changeset
967 void send_msg_channel_failure(const struct Channel *channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
968
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
969 TRACE(("enter send_msg_channel_failure"))
1625
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
970
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
971 if (channel->sent_close) {
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
972 TRACE(("Skipping sending msg_channel_failure for closed channel"))
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
973 return;
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
974 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
975 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
976
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
977 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
978 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
979
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
980 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
981 TRACE(("leave send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
982 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
983
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
984 /* Send a success message */
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1325
diff changeset
985 void send_msg_channel_success(const struct Channel *channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
986
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
987 TRACE(("enter send_msg_channel_success"))
1625
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
988 if (channel->sent_close) {
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
989 TRACE(("Skipping sending msg_channel_success for closed channel"))
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
990 return;
79eef94ccea9 Split ChanType closehandler() and cleanup() so that dbclient doesn't
Matt Johnston <matt@ucc.asn.au>
parents: 1511
diff changeset
991 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
992 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
993
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
994 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
995 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
996
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
997 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
998 TRACE(("leave send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
999 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1000
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1001 /* 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
1002 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1003 static void send_msg_channel_open_failure(unsigned int remotechan,
1098
f95b6e87cd0c Turn send_msg_channel_open_failure()'s text and lang into const char *
Gaël PORTAY <gael.portay@gmail.com>
parents: 1097
diff changeset
1004 int reason, const char *text, const char *lang) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1005
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
1006 TRACE(("enter send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1007 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1008
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1009 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
1010 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1011 buf_putint(ses.writepayload, reason);
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1098
diff changeset
1012 buf_putstring(ses.writepayload, text, strlen(text));
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1098
diff changeset
1013 buf_putstring(ses.writepayload, lang, strlen(lang));
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1014
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1015 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
1016 TRACE(("leave send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1017 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1018
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1019 /* 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
1020 * allocated and the receive parameters */
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1325
diff changeset
1021 static void send_msg_channel_open_confirmation(const struct Channel* channel,
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1022 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1023 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1024
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
1025 TRACE(("enter send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1026 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1027
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1028 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
1029 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1030 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1031 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1032 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1033
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1034 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
1035 TRACE(("leave send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1036 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1037
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1038 /* 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
1039 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
1040
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1041 int closein = 0, closeout = 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1042
1829
a7cc3332d8ab Replace ChanType.sepfds with Channel.bidir_fd
Matt Johnston <matt@ucc.asn.au>
parents: 1828
diff changeset
1043 if (channel->bidir_fd) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1044 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
1045 shutdown(fd, how);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1046 if (how == 0) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1047 closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1048 } else {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1049 closein = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1050 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1051 } else {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1052 TRACE(("CLOSE some fd %d", fd))
1039
d0e6dd5af46e Use m_close() which will avoid close(-1)
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
1053 m_close(fd);
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1054 closein = closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1055 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1056
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1057 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
1058 channel->readfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1059 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1060 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
1061 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1062 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1063
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1064 if (closein && fd == channel->writefd) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1065 channel->writefd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1066 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1067 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
1068 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1069 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1070
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1071 /* 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
1072 * need to close() it to stop it lingering */
1829
a7cc3332d8ab Replace ChanType.sepfds with Channel.bidir_fd
Matt Johnston <matt@ucc.asn.au>
parents: 1828
diff changeset
1073 if (channel->bidir_fd && channel->readfd == FD_CLOSED
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1074 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1075 TRACE(("CLOSE (finally) of %d", fd))
1039
d0e6dd5af46e Use m_close() which will avoid close(-1)
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
1076 m_close(fd);
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1077 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1078 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1079
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1080
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1192
diff changeset
1081 #if (DROPBEAR_LISTENERS) || (DROPBEAR_CLIENT)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1082 /* 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
1083 * 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
1084 * 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
1085 * 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
1086 * 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
1087 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
1088
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1089 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1090
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
1091 TRACE(("enter send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1092 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1093 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
1094 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
1095 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1096 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1097
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1098 /* 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
1099 * 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
1100
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1101 /* set fd non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
1102 setnonblocking(fd);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1103
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1104 chan->writefd = chan->readfd = fd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1105 ses.maxfd = MAX(ses.maxfd, fd);
1829
a7cc3332d8ab Replace ChanType.sepfds with Channel.bidir_fd
Matt Johnston <matt@ucc.asn.au>
parents: 1828
diff changeset
1106 chan->bidir_fd = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1107
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1108 chan->await_open = 1;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1109
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1110 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1111 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1112
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1113 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN);
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1098
diff changeset
1114 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
1115 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
1116 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
1117 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
1118
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
1119 TRACE(("leave send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1120 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1121 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1122
1827
8a78cc13eb30 Fix some outdated comments
Matt Johnston <matt@ucc.asn.au>
parents: 1800
diff changeset
1123 /* Confirmation that our channel open request was
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1124 * successful*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1125 void recv_msg_channel_open_confirmation() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1126
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1127 struct Channel * channel;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1128 int ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1129
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
1130 TRACE(("enter recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1131
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1132 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1133
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1134 if (!channel->await_open) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
1135 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
1136 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1137 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1138
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1139 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1140 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1141 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
1142
187
c44df7123b0a compile fix when TRACE debugging is enabled
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
1143 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
1144 channel->remotechan, channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1145
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1146 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1147 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1148 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1149 if (ret > 0) {
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1150 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
1151 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
1152 return;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1153 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1154 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1155
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1156 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1157 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1158 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1159 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
1160
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
1161 TRACE(("leave recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1162 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1163
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1164 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1165 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1166
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1167 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1168
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1169 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1170
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1171 if (!channel->await_open) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
1172 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
1173 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1174 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1175
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1176 remove_channel(channel);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1177 }
1295
750ec4ec4cbe Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents: 1192
diff changeset
1178 #endif /* DROPBEAR_LISTENERS */
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1179
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1180 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
1181 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1182 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
1183 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1184 }
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1185
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1186 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
1187 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1188 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
1189 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1190 }
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1191
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1192 struct Channel* get_any_ready_channel() {
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 970
diff changeset
1193 size_t i;
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1194 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
1195 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
1196 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1197 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
1198 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
1199 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
1200 && !(chan->sent_eof || chan->recv_eof)
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
1201 && !(chan->await_open)) {
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1202 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
1203 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1204 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1205 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
1206 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1207
1459
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1325
diff changeset
1208 void start_send_channel_request(const struct Channel *channel,
06d52bcb8094 Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents: 1325
diff changeset
1209 const char *type) {
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1210
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1211 CHECKCLEARTOWRITE();
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1212 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
1213 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
1214
1122
aaf576b27a10 Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents: 1098
diff changeset
1215 buf_putstring(ses.writepayload, type, strlen(type));
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1216
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1217 }