annotate common-channel.c @ 1071:696205e3dc99 pam

Remove ATTRIB_NORETURN from session_loop() since it returns. The stack breaks pretty badly.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 17 Mar 2015 21:58:32 +0800
parents c71df09bc610
children 10f198d4a308
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002-2004 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 /* Handle the multiplexed channels, such as sessions, x11, agent connections */
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26
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27 #include "includes.h"
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28 #include "session.h"
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29 #include "packet.h"
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30 #include "ssh.h"
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31 #include "buffer.h"
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32 #include "circbuffer.h"
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33 #include "dbutil.h"
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34 #include "channel.h"
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35 #include "ssh.h"
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36 #include "listener.h"
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37 #include "runopts.h"
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38 #include "netio.h"
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40 static void send_msg_channel_open_failure(unsigned int remotechan, int reason,
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41 const unsigned char *text, const unsigned char *lang);
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42 static void send_msg_channel_open_confirmation(struct Channel* channel,
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43 unsigned int recvwindow,
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44 unsigned int recvmaxpacket);
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45 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf,
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46 const unsigned char *moredata, unsigned int *morelen);
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47 static void send_msg_channel_window_adjust(struct Channel *channel,
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48 unsigned int incr);
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49 static void send_msg_channel_data(struct Channel *channel, int isextended);
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50 static void send_msg_channel_eof(struct Channel *channel);
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51 static void send_msg_channel_close(struct Channel *channel);
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52 static void remove_channel(struct Channel *channel);
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53 static unsigned int write_pending(struct Channel * channel);
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54 static void check_close(struct Channel *channel);
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55 static void close_chan_fd(struct Channel *channel, int fd, int how);
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57 #define FD_UNINIT (-2)
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58 #define FD_CLOSED (-1)
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59
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60 #define ERRFD_IS_READ(channel) ((channel)->extrabuf == NULL)
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61 #define ERRFD_IS_WRITE(channel) (!ERRFD_IS_READ(channel))
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62
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63 /* allow space for:
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64 * 1 byte byte SSH_MSG_CHANNEL_DATA
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65 * 4 bytes uint32 recipient channel
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66 * 4 bytes string data
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67 */
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68 #define RECV_MAX_CHANNEL_DATA_LEN (RECV_MAX_PAYLOAD_LEN-(1+4+4))
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70 /* Initialise all the channels */
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71 void chaninitialise(const struct ChanType *chantypes[]) {
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73 /* may as well create space for a single channel */
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74 ses.channels = (struct Channel**)m_malloc(sizeof(struct Channel*));
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75 ses.chansize = 1;
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76 ses.channels[0] = NULL;
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77 ses.chancount = 0;
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79 ses.chantypes = chantypes;
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80
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81 #ifdef USING_LISTENERS
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82 listeners_initialise();
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83 #endif
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85 }
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86
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87 /* Clean up channels, freeing allocated memory */
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88 void chancleanup() {
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89
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90 unsigned int i;
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91
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92 TRACE(("enter chancleanup"))
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93 for (i = 0; i < ses.chansize; i++) {
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94 if (ses.channels[i] != NULL) {
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95 TRACE(("channel %d closing", i))
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96 remove_channel(ses.channels[i]);
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97 }
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98 }
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99 m_free(ses.channels);
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100 TRACE(("leave chancleanup"))
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101 }
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102
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103 static void
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104 chan_initwritebuf(struct Channel *channel)
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105 {
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106 dropbear_assert(channel->writebuf->size == 0 && channel->recvwindow == 0);
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107 cbuf_free(channel->writebuf);
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108 channel->writebuf = cbuf_new(opts.recv_window);
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109 channel->recvwindow = opts.recv_window;
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110 }
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111
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112 /* Create a new channel entry, send a reply confirm or failure */
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113 /* If remotechan, transwindow and transmaxpacket are not know (for a new
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114 * outgoing connection, with them to be filled on confirmation), they should
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115 * all be set to 0 */
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116 static struct Channel* newchannel(unsigned int remotechan,
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117 const struct ChanType *type,
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118 unsigned int transwindow, unsigned int transmaxpacket) {
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119
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120 struct Channel * newchan;
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121 unsigned int i, j;
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122
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123 TRACE(("enter newchannel"))
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125 /* first see if we can use existing channels */
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126 for (i = 0; i < ses.chansize; i++) {
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127 if (ses.channels[i] == NULL) {
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128 break;
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129 }
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130 }
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131
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132 /* otherwise extend the list */
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133 if (i == ses.chansize) {
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134 if (ses.chansize >= MAX_CHANNELS) {
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135 TRACE(("leave newchannel: max chans reached"))
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136 return NULL;
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137 }
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138
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139 /* extend the channels */
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140 ses.channels = (struct Channel**)m_realloc(ses.channels,
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141 (ses.chansize+CHAN_EXTEND_SIZE)*sizeof(struct Channel*));
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142
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143 ses.chansize += CHAN_EXTEND_SIZE;
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144
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145 /* set the new channels to null */
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146 for (j = i; j < ses.chansize; j++) {
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147 ses.channels[j] = NULL;
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148 }
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149
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150 }
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151
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152 newchan = (struct Channel*)m_malloc(sizeof(struct Channel));
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153 newchan->type = type;
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154 newchan->index = i;
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155 newchan->sent_close = newchan->recv_close = 0;
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156 newchan->sent_eof = newchan->recv_eof = 0;
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157 newchan->close_handler_done = 0;
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158
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159 newchan->remotechan = remotechan;
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160 newchan->transwindow = transwindow;
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161 newchan->transmaxpacket = transmaxpacket;
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162
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163 newchan->typedata = NULL;
253
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164 newchan->writefd = FD_UNINIT;
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165 newchan->readfd = FD_UNINIT;
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166 newchan->errfd = FD_CLOSED; /* this isn't always set to start with */
243
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167 newchan->await_open = 0;
416
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168 newchan->flushing = 0;
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169
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170 newchan->writebuf = cbuf_new(0); /* resized later by chan_initwritebuf */
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171 newchan->recvwindow = 0;
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172
107
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173 newchan->extrabuf = NULL; /* The user code can set it up */
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174 newchan->recvdonelen = 0;
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175 newchan->recvmaxpacket = RECV_MAX_CHANNEL_DATA_LEN;
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176
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177 newchan->prio = DROPBEAR_CHANNEL_PRIO_EARLY; /* inithandler sets it */
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178
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179 ses.channels[i] = newchan;
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180 ses.chancount++;
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181
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182 TRACE(("leave newchannel"))
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183
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184 return newchan;
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185 }
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186
179
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187 /* Returns the channel structure corresponding to the channel in the current
362
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188 * data packet (ses.payload must be positioned appropriately).
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189 * A valid channel is always returns, it will fail fatally with an unknown
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190 * channel */
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191 static struct Channel* getchannel_msg(const char* kind) {
179
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192
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193 unsigned int chan;
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194
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195 chan = buf_getint(ses.payload);
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196 if (chan >= ses.chansize || ses.channels[chan] == NULL) {
362
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197 if (kind) {
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198 dropbear_exit("%s for unknown channel %d", kind, chan);
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199 } else {
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200 dropbear_exit("Unknown channel %d", chan);
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201 }
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202 }
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203 return ses.channels[chan];
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204 }
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205
362
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206 struct Channel* getchannel() {
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207 return getchannel_msg(NULL);
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208 }
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209
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210 /* Iterate through the channels, performing IO if available */
253
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211 void channelio(fd_set *readfds, fd_set *writefds) {
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212
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213 /* Listeners such as TCP, X11, agent-auth */
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214 struct Channel *channel;
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215 unsigned int i;
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216
363
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217 /* foreach channel */
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218 for (i = 0; i < ses.chansize; i++) {
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219 /* Close checking only needs to occur for channels that had IO events */
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220 int do_check_close = 0;
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221
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222 channel = ses.channels[i];
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223 if (channel == NULL) {
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224 /* only process in-use channels */
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225 continue;
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226 }
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227
253
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228 /* read data and send it over the wire */
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diff changeset
229 if (channel->readfd >= 0 && FD_ISSET(channel->readfd, readfds)) {
416
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diff changeset
230 TRACE(("send normal readfd"))
363
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diff changeset
231 send_msg_channel_data(channel, 0);
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232 do_check_close = 1;
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233 }
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234
253
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diff changeset
235 /* read stderr data and send it over the wire */
416
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diff changeset
236 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
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diff changeset
237 && FD_ISSET(channel->errfd, readfds)) {
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diff changeset
238 TRACE(("send normal errfd"))
363
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diff changeset
239 send_msg_channel_data(channel, 1);
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diff changeset
240 do_check_close = 1;
395
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parents: 394
diff changeset
241 }
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diff changeset
242
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243 /* write to program/pipe stdin */
253
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parents: 243
diff changeset
244 if (channel->writefd >= 0 && FD_ISSET(channel->writefd, writefds)) {
1054
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parents: 1049
diff changeset
245 writechannel(channel, channel->writefd, channel->writebuf, NULL, NULL);
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diff changeset
246 do_check_close = 1;
108
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diff changeset
247 }
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diff changeset
248
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diff changeset
249 /* stderr for client mode */
375
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parents: 365
diff changeset
250 if (ERRFD_IS_WRITE(channel)
253
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parents: 243
diff changeset
251 && channel->errfd >= 0 && FD_ISSET(channel->errfd, writefds)) {
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diff changeset
252 writechannel(channel, channel->errfd, channel->extrabuf, NULL, NULL);
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253 do_check_close = 1;
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254 }
955
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255
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diff changeset
256 if (ses.channel_signal_pending) {
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diff changeset
257 /* SIGCHLD can change channel state for server sessions */
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258 do_check_close = 1;
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diff changeset
259 ses.channel_signal_pending = 0;
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260 }
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261
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diff changeset
262 /* handle any channel closing etc */
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263 if (do_check_close) {
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diff changeset
264 check_close(channel);
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265 }
363
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266 }
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267
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diff changeset
268 #ifdef USING_LISTENERS
253
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diff changeset
269 handle_listeners(readfds);
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270 #endif
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271 }
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272
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273
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diff changeset
274 /* Returns true if there is data remaining to be written to stdin or
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diff changeset
275 * stderr of a channel's endpoint. */
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diff changeset
276 static unsigned int write_pending(struct Channel * channel) {
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277
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diff changeset
278 if (channel->writefd >= 0 && cbuf_getused(channel->writebuf) > 0) {
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diff changeset
279 return 1;
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diff changeset
280 } else if (channel->errfd >= 0 && channel->extrabuf &&
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diff changeset
281 cbuf_getused(channel->extrabuf) > 0) {
363
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diff changeset
282 return 1;
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diff changeset
283 }
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284 return 0;
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285 }
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286
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287
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diff changeset
288 /* EOF/close handling */
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diff changeset
289 static void check_close(struct Channel *channel) {
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diff changeset
290 int close_allowed = 0;
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291
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292 TRACE2(("check_close: writefd %d, readfd %d, errfd %d, sent_close %d, recv_close %d",
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
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diff changeset
293 channel->writefd, channel->readfd,
359
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diff changeset
294 channel->errfd, channel->sent_close, channel->recv_close))
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295 TRACE2(("writebuf size %d extrabuf size %d",
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diff changeset
296 channel->writebuf ? cbuf_getused(channel->writebuf) : 0,
375
8d149b812669 - Add some extra tracing.
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parents: 365
diff changeset
297 channel->extrabuf ? cbuf_getused(channel->extrabuf) : 0))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
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diff changeset
298
652
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diff changeset
299 if (!channel->flushing
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diff changeset
300 && !channel->close_handler_done
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diff changeset
301 && channel->type->check_close
416
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diff changeset
302 && channel->type->check_close(channel))
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diff changeset
303 {
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diff changeset
304 channel->flushing = 1;
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305 }
467
0871a0b89f7c Don't return until the shell has quit. This will ensure that an exit status
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diff changeset
306
504
950c38b854a1 Don't use // style comments
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diff changeset
307 /* if a type-specific check_close is defined we will only exit
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diff changeset
308 once that has been triggered. this is only used for a server "session"
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diff changeset
309 channel, to ensure that the shell has exited (and the exit status
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parents: 495
diff changeset
310 retrieved) before we close things up. */
467
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diff changeset
311 if (!channel->type->check_close
652
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312 || channel->close_handler_done
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diff changeset
313 || channel->type->check_close(channel)) {
467
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diff changeset
314 close_allowed = 1;
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315 }
416
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316
467
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diff changeset
317 if (channel->recv_close && !write_pending(channel) && close_allowed) {
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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parents: 415
diff changeset
318 if (!channel->sent_close) {
165
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diff changeset
319 TRACE(("Sending MSG_CHANNEL_CLOSE in response to same."))
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320 send_msg_channel_close(channel);
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321 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
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322 remove_channel(channel);
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parents: 359
diff changeset
323 return;
397
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324 }
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325
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diff changeset
326 if ((channel->recv_eof && !write_pending(channel))
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327 /* have a server "session" and child has exited */
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diff changeset
328 || (channel->type->check_close && close_allowed)) {
364
90cb290836de Passes most test cases now
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329 close_chan_fd(channel, channel->writefd, SHUT_WR);
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330 }
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331
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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diff changeset
332 /* Special handling for flushing read data after an exit. We
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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parents: 415
diff changeset
333 read regardless of whether the select FD was set,
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diff changeset
334 and if there isn't data available, the channel will get closed. */
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diff changeset
335 if (channel->flushing) {
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diff changeset
336 TRACE(("might send data, flushing"))
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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parents: 415
diff changeset
337 if (channel->readfd >= 0 && channel->transwindow > 0) {
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diff changeset
338 TRACE(("send data readfd"))
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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diff changeset
339 send_msg_channel_data(channel, 0);
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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parents: 415
diff changeset
340 }
439
ab370c629d36 Fix a stupid bug s/readfd/errfd/ affecting channel close on child exit
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parents: 433
diff changeset
341 if (ERRFD_IS_READ(channel) && channel->errfd >= 0
416
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parents: 415
diff changeset
342 && channel->transwindow > 0) {
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diff changeset
343 TRACE(("send data errfd"))
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diff changeset
344 send_msg_channel_data(channel, 1);
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345 }
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346 }
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diff changeset
347
375
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diff changeset
348 /* If we're not going to send any more data, send EOF */
359
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parents: 332
diff changeset
349 if (!channel->sent_eof
365
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parents: 364
diff changeset
350 && channel->readfd == FD_CLOSED
375
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parents: 365
diff changeset
351 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)) {
397
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
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parents: 396
diff changeset
352 send_msg_channel_eof(channel);
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diff changeset
353 }
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354
375
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diff changeset
355 /* And if we can't receive any more data from them either, close up */
467
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356 if (channel->readfd == FD_CLOSED
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357 && channel->writefd == FD_CLOSED
423
b2b67cfcd66e - Fix bug in child-exit handling where the wrong pid was being matched.
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parents: 416
diff changeset
358 && (ERRFD_IS_WRITE(channel) || channel->errfd == FD_CLOSED)
467
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359 && !channel->sent_close
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360 && close_allowed
416
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361 && !write_pending(channel)) {
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362 TRACE(("sending close, readfd is closed"))
397
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diff changeset
363 send_msg_channel_close(channel);
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364 }
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365 }
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366
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367 /* Check whether a deferred (EINPROGRESS) connect() was successful, and
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368 * if so, set up the channel properly. Otherwise, the channel is cleaned up, so
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369 * it is important that the channel reference isn't used after a call to this
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370 * function */
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371 void channel_connect_done(int result, int sock, void* user_data, const char* UNUSED(errstring)) {
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372
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373 struct Channel *channel = user_data;
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374
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375 TRACE(("enter channel_connect_done"))
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376
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377 if (result == DROPBEAR_SUCCESS)
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378 {
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379 channel->readfd = channel->writefd = sock;
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380 channel->conn_pending = NULL;
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parents: 673
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381 chan_initwritebuf(channel);
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parents: 62
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382 send_msg_channel_open_confirmation(channel, channel->recvwindow,
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383 channel->recvmaxpacket);
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384 TRACE(("leave channel_connect_done: success"))
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385 }
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386 else
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387 {
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388 send_msg_channel_open_failure(channel->remotechan,
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389 SSH_OPEN_CONNECT_FAILED, "", "");
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390 remove_channel(channel);
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391 TRACE(("leave check_in_progress: fail"))
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392 }
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parents:
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393 }
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parents:
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394
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395
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parents:
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396 /* Send the close message and set the channel as closed */
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397 static void send_msg_channel_close(struct Channel *channel) {
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398
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399 TRACE(("enter send_msg_channel_close %p", (void*)channel))
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400 if (channel->type->closehandler
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diff changeset
401 && !channel->close_handler_done) {
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402 channel->type->closehandler(channel);
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403 channel->close_handler_done = 1;
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404 }
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405
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406 CHECKCLEARTOWRITE();
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407
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408 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_CLOSE);
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409 buf_putint(ses.writepayload, channel->remotechan);
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410
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411 encrypt_packet();
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412
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413 channel->sent_eof = 1;
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414 channel->sent_close = 1;
416
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diff changeset
415 close_chan_fd(channel, channel->readfd, SHUT_RD);
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416 close_chan_fd(channel, channel->errfd, SHUT_RDWR);
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417 close_chan_fd(channel, channel->writefd, SHUT_WR);
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418 TRACE(("leave send_msg_channel_close"))
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419 }
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420
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421 /* call this when trans/eof channels are closed */
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422 static void send_msg_channel_eof(struct Channel *channel) {
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423
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parents: 156
diff changeset
424 TRACE(("enter send_msg_channel_eof"))
4
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425 CHECKCLEARTOWRITE();
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426
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427 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_EOF);
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428 buf_putint(ses.writepayload, channel->remotechan);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
429
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
432 channel->sent_eof = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433
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
434 TRACE(("leave send_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
437 /* Called to write data out to the local side of the channel.
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
438 Writes the circular buffer contents and also the "moredata" buffer
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
439 if not null. Will ignore EAGAIN */
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
440 static void writechannel(struct Channel* channel, int fd, circbuffer *cbuf,
c71df09bc610 Avoid copying data into circular buffer
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parents: 1049
diff changeset
441 const unsigned char *moredata, unsigned int *morelen) {
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442
1054
c71df09bc610 Avoid copying data into circular buffer
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parents: 1049
diff changeset
443 struct iovec iov[3];
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
444 unsigned char *circ_p1, *circ_p2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
445 unsigned int circ_len1, circ_len2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
446 int io_count = 0;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
447
c71df09bc610 Avoid copying data into circular buffer
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parents: 1049
diff changeset
448 int written;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
450 TRACE(("enter writechannel fd %d", fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451
1054
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Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
452 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
453
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
454 if (circ_len1 > 0) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
455 TRACE(("circ1 %d", circ_len1))
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
456 iov[io_count].iov_base = circ_p1;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
457 iov[io_count].iov_len = circ_len1;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
458 io_count++;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
459 }
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 if (circ_len2 > 0) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
462 TRACE(("circ2 %d", circ_len2))
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
463 iov[io_count].iov_base = circ_p2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
464 iov[io_count].iov_len = circ_len2;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
465 io_count++;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
466 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
467
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
468 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
469 assert(moredata);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
470 TRACE(("more %d", *morelen))
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
471 iov[io_count].iov_base = (void*)moredata;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
472 iov[io_count].iov_len = *morelen;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
473 io_count++;
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
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
476 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
477 /* Default return value, none consumed */
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
478 *morelen = 0;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
479 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
480
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
481 written = writev(fd, iov, io_count);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
482
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
483 if (written < 0) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
484 if (errno != EINTR && errno != EAGAIN) {
1071
696205e3dc99 Remove ATTRIB_NORETURN from session_loop() since it returns.
Matt Johnston <matt@ucc.asn.au>
parents: 1054
diff changeset
485 TRACE(("errno %d", errno))
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
486 close_chan_fd(channel, fd, SHUT_WR);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
487 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
488 } else {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
489 int cbuf_written = MIN(circ_len1+circ_len2, (unsigned int)written);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
490 cbuf_incrread(cbuf, cbuf_written);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
491 if (morelen) {
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
492 *morelen = written - cbuf_written;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
493 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
494 channel->recvdonelen += written;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
495 }
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
496
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
497 #if 0
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
498
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
499 maxlen = cbuf_readlen(cbuf);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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diff changeset
500
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
501 /* Write the data out */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
502 len = write(fd, cbuf_readptr(cbuf, maxlen), maxlen);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 if (len <= 0) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
504 TRACE(("errno %d len %d", errno, len))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505 if (len < 0 && errno != EINTR) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
506 close_chan_fd(channel, fd, SHUT_WR);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
508 TRACE(("leave writechannel: len <= 0"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 return;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
511 TRACE(("writechannel wrote %d", len))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
512
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
513 cbuf_incrread(cbuf, len);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
514 channel->recvdonelen += len;
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
515 #endif
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
516
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
517 /* Window adjust handling */
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
518 if (channel->recvdonelen >= RECV_WINDOWEXTEND) {
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
519 send_msg_channel_window_adjust(channel, channel->recvdonelen);
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
520 channel->recvwindow += channel->recvdonelen;
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
521 channel->recvdonelen = 0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 }
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
523
449
3e6c536bc023 Add -W <windowsize> argument and document it.
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
524 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
525 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
526 dropbear_assert(channel->extrabuf == NULL ||
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
527 channel->recvwindow <= cbuf_getavail(channel->extrabuf));
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
528
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
529 TRACE(("leave writechannel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 /* 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
533 * This avoid channels which don't have any window available, are closed, etc*/
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
534 void setchannelfds(fd_set *readfds, fd_set *writefds) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 struct Channel * channel;
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 for (i = 0; i < ses.chansize; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 channel = ses.channels[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 if (channel == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 continue;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
545
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
546 /* 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
547 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
548 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
549 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
550 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
551 if (channel->transwindow > 0
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
Matt Johnston <matt@ucc.asn.au>
parents: 815
diff changeset
552 && (ses.dataallowed || channel->read_mangler)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
554 if (channel->readfd >= 0) {
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
555 FD_SET(channel->readfd, readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 }
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
557
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
558 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
559 FD_SET(channel->errfd, readfds);
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 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562
397
2908122e9eed disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
Matt Johnston <matt@ucc.asn.au>
parents: 396
diff changeset
563 /* Stuff from the wire */
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
564 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
565 FD_SET(channel->writefd, writefds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
568 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
569 && 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
570 FD_SET(channel->errfd, writefds);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
571 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
572
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 } /* foreach channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
575 #ifdef USING_LISTENERS
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
576 set_listener_fds(readfds);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581 /* 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
582 * 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
583 * etc) FD is also EOF */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584 void recv_msg_channel_eof() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587
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
588 TRACE(("enter recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
589
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
590 channel = getchannel_msg("EOF");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
592 channel->recv_eof = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
593
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
594 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
595 TRACE(("leave recv_msg_channel_eof"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
597
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
598
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
599 /* 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
600 void recv_msg_channel_close() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
602 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
603
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
604 TRACE(("enter recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
605
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
606 channel = getchannel_msg("Close");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
607
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
608 channel->recv_eof = 1;
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
609 channel->recv_close = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
611 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
612 TRACE(("leave recv_msg_channel_close"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615 /* 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
616 * channel close */
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
617 static void remove_channel(struct Channel * channel) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
619 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
620 TRACE(("channel index is %d", channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621
709
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
622 cbuf_free(channel->writebuf);
abd99ecd7ec2 use an empty writebuf rather than a NULL one
Matt Johnston <matt@ucc.asn.au>
parents: 707
diff changeset
623 channel->writebuf = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
624
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
625 if (channel->extrabuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
626 cbuf_free(channel->extrabuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
627 channel->extrabuf = NULL;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
628 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
629
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
630
938
c88dce72f6d2 Make sure client exit messages don't get lost
Matt Johnston <matt@ucc.asn.au>
parents: 937
diff changeset
631 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
632 /* 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
633 * 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
634 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
635 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
636 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
637 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
638 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
639 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
640 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
641
770
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
642 if (!channel->close_handler_done
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
643 && channel->type->closehandler) {
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
644 channel->type->closehandler(channel);
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
645 channel->close_handler_done = 1;
7577a3afc42d run closehandlers on cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 731
diff changeset
646 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
648 if (channel->conn_pending) {
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
649 cancel_connect(channel->conn_pending);
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
650 }
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
651
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
652 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
653 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
654 ses.chancount--;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
656 update_channel_prio();
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
657
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
658 TRACE(("leave remove_channel"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 /* 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
662 * such as chansession or x11fwd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663 void recv_msg_channel_request() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665 struct Channel *channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
667 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
668
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 970
diff changeset
669 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
670
495
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
671 if (channel->sent_close) {
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
672 TRACE(("leave recv_msg_channel_request: already closed channel"))
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
673 return;
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
674 }
cd02449b709c Don't send anything in response to a SSH_MSG_CHANNEL_REQUEST if we have
Matt Johnston <matt@ucc.asn.au>
parents: 467
diff changeset
675
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
676 if (channel->type->reqhandler
17962b2a6b8f - Make sure we don't use channel-specific data after it has been freed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
677 && !channel->close_handler_done) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 channel->type->reqhandler(channel);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
679 } 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
680 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
681 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
682 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
683 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
684 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
685 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
686 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
687
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
688 TRACE(("leave recv_msg_channel_request"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
689
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
690 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
691
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692 /* 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
693 * channel_data packet to send.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
694 * 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
695 * 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
696 * exttype */
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
697 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
698
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
699 int len;
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
700 size_t maxlen, size_pos;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
701 int fd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
702
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
703 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
704
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
705 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
706 dropbear_assert(!channel->sent_close);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
707
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 if (isextended) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
709 fd = channel->errfd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
710 } else {
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
711 fd = channel->readfd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
712 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
713 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
714 dropbear_assert(fd >= 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
715
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
716 maxlen = MIN(channel->transwindow, channel->transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
717 /* -(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
718 * exttype if is extended */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
719 maxlen = MIN(maxlen,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
720 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
721 TRACE(("maxlen %zd", maxlen))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
722 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
723 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
724 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
725 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
726
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
727 buf_putbyte(ses.writepayload,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
728 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
729 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
730 if (isextended) {
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
731 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
732 }
362
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
733 /* 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
734 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
735 buf_putint(ses.writepayload, 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
736
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737 /* 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
738 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
739
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
740 if (len <= 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
741 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
742 /* 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
743 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
744 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
745 close_chan_fd(channel, fd, SHUT_RD);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
746 }
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
747 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
748 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
749 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
750 len, errno, fd))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
751 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
752 }
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
753
722
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
754 if (channel->read_mangler) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
755 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
756 if (len == 0) {
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
757 buf_setpos(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
758 buf_setlen(ses.writepayload, 0);
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
759 return;
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
760 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
761 }
4a274f47eabd Add ~. and ~^Z handling to exit/suspend dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 709
diff changeset
762
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
763 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
764 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
765 /* ... real size here */
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
766 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
767 buf_putint(ses.writepayload, len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769 channel->transwindow -= len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
770
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
771 encrypt_packet();
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
772
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
773 /* If we receive less data than we requested when flushing, we've
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
774 reached the equivalent of EOF */
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 423
diff changeset
775 if (channel->flushing && len < (ssize_t)maxlen)
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
776 {
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
777 TRACE(("closing from channel, flushing out."))
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
778 close_chan_fd(channel, fd, SHUT_RD);
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
Matt Johnston <matt@ucc.asn.au>
parents: 415
diff changeset
779 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
780 TRACE(("leave send_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
781 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
783 /* We receive channel data */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
784 void recv_msg_channel_data() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
785
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
786 struct Channel *channel;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
788 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
790 common_recv_msg_channel_data(channel, channel->writefd, channel->writebuf);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
791 }
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
792
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
793 /* 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
794 * for writing to the local file descriptor */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
795 void common_recv_msg_channel_data(struct Channel *channel, int fd,
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
796 circbuffer * cbuf) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
797
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
798 unsigned int datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
799 unsigned int maxdata;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
800 unsigned int buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
801 unsigned int len;
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
802 unsigned int consumed;
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
803
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
804 TRACE(("enter recv_msg_channel_data"))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
805
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
806 if (channel->recv_eof) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
807 dropbear_exit("Received data after eof");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
809
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
810 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
811 /* 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
812 * 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
813 * 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
814 return;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
815 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
816
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 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
818 TRACE(("length %d", datalen))
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
819
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
820 maxdata = cbuf_getavail(cbuf);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
821
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
822 /* 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
823 * 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
824 * just die horribly */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
825 if (datalen > maxdata) {
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
826 dropbear_exit("Oversized packet");
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
828
1054
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
829 dropbear_assert(channel->recvwindow >= datalen);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
830 channel->recvwindow -= datalen;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
831 dropbear_assert(channel->recvwindow <= opts.recv_window);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
832
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
833 consumed = datalen;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
834 writechannel(channel, fd, cbuf, buf_getptr(ses.payload, datalen), &consumed);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
835
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
836 datalen -= consumed;
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
837 buf_incrpos(ses.payload, consumed);
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
838
c71df09bc610 Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
839
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
840 /* We may have to run throught twice, if the buffer wraps around. Can't
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
841 * just "leave it for next time" like with writechannel, since this
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
842 * is payload data */
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
843 len = datalen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
844 while (len > 0) {
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
845 buflen = cbuf_writelen(cbuf);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
846 buflen = MIN(buflen, len);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
847
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
848 memcpy(cbuf_writeptr(cbuf, buflen),
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
849 buf_getptr(ses.payload, buflen), buflen);
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
850 cbuf_incrwrite(cbuf, buflen);
108
10f4d3319780 - added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents: 107
diff changeset
851 buf_incrpos(ses.payload, buflen);
107
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
852 len -= buflen;
Matt Johnston <matt@ucc.asn.au>
parents: 70
diff changeset
853 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854
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
855 TRACE(("leave recv_msg_channel_data"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
856 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
857
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
858 /* 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
859 * 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
860 * 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
861 void recv_msg_channel_window_adjust() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
862
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
863 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
864 unsigned int incr;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
865
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
866 channel = getchannel();
4
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 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
869 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
870 incr = MIN(incr, TRANS_MAX_WIN_INCR);
4
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 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
873 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
874
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 /* 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
878 * end know */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879 static void send_msg_channel_window_adjust(struct Channel* channel,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880 unsigned int incr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881
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
882 TRACE(("sending window adjust %d", incr))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
883 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
885 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
886 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 buf_putint(ses.writepayload, incr);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
888
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
889 encrypt_packet();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
891
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
892 /* 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
893 void recv_msg_channel_open() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
894
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
895 unsigned char *type;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 unsigned int typelen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
897 unsigned int remotechan, transwindow, transmaxpacket;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
898 struct Channel *channel;
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
899 const struct ChanType **cp;
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
900 const struct ChanType *chantype;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
901 unsigned int errtype = SSH_OPEN_UNKNOWN_CHANNEL_TYPE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
902 int ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
903
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
904
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 156
diff changeset
905 TRACE(("enter recv_msg_channel_open"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
906
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
907 /* get the packet contents */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
908 type = buf_getstring(ses.payload, &typelen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
909
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
910 remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
911 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
912 transwindow = MIN(transwindow, TRANS_MAX_WINDOW);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913 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
914 transmaxpacket = MIN(transmaxpacket, TRANS_MAX_PAYLOAD_LEN);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
915
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
916 /* figure what type of packet it is */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917 if (typelen > MAX_NAME_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
919 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
920
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
921 /* 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
922 * 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
923 * this list and find the matching name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
924 for (cp = &ses.chantypes[0], chantype = (*cp);
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
925 chantype != NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
926 cp++, chantype = (*cp)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
927 if (strcmp(type, chantype->name) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928 break;
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932 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
933 TRACE(("No matching type for '%s'", type))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
934 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
935 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
936
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
937 TRACE(("matched type '%s'", type))
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
938
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
939 /* create the channel */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
940 channel = newchannel(remotechan, chantype, transwindow, transmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
941
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
942 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
943 TRACE(("newchannel returned NULL"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
944 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
945 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
946
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
947 if (channel->type->inithandler) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
948 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
949 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
950 /* 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
951 goto cleanup;
1c7bf9cec6c8 Rearranged some more bits, marked some areas that need work.
Matt Johnston <matt@ucc.asn.au>
parents: 359
diff changeset
952 }
6
ab00ef513e97 Sorted out the first channel init issues.
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
953 if (ret > 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
954 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
955 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
956 TRACE(("inithandler returned failure %d", ret))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
957 goto failure;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
958 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
959 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
960
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
961 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
962 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
963 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
964
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
965 chan_initwritebuf(channel);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
966
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
967 /* success */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
968 send_msg_channel_open_confirmation(channel, channel->recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
969 channel->recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
970 goto cleanup;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
971
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
972 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
973 TRACE(("recv_msg_channel_open failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
974 send_msg_channel_open_failure(remotechan, errtype, "", "");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
975
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
976 cleanup:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
977 m_free(type);
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
978
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
979 update_channel_prio();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
980
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 recv_msg_channel_open"))
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 failure message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
985 void send_msg_channel_failure(struct Channel *channel) {
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_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
988 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
989
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
990 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_FAILURE);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
991 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
992
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
993 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
994 TRACE(("leave send_msg_channel_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
995 }
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 /* Send a success message */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
998 void send_msg_channel_success(struct Channel *channel) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
999
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
1000 TRACE(("enter send_msg_channel_success"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1001 CHECKCLEARTOWRITE();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1002
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1003 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_SUCCESS);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1004 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1005
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1006 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
1007 TRACE(("leave send_msg_channel_success"))
4
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
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1010 /* 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
1011 * code (usually resource shortage or unknown chan type) */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1012 static void send_msg_channel_open_failure(unsigned int remotechan,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1013 int reason, const unsigned char *text, const unsigned char *lang) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1014
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
1015 TRACE(("enter send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1016 CHECKCLEARTOWRITE();
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 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
1019 buf_putint(ses.writepayload, remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1020 buf_putint(ses.writepayload, reason);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1021 buf_putstring(ses.writepayload, text, strlen((char*)text));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1022 buf_putstring(ses.writepayload, lang, strlen((char*)lang));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1023
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1024 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
1025 TRACE(("leave send_msg_channel_open_failure"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1026 }
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 /* 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
1029 * allocated and the receive parameters */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1030 static void send_msg_channel_open_confirmation(struct Channel* channel,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1031 unsigned int recvwindow,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1032 unsigned int recvmaxpacket) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1033
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
1034 TRACE(("enter send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1035 CHECKCLEARTOWRITE();
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 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
1038 buf_putint(ses.writepayload, channel->remotechan);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1039 buf_putint(ses.writepayload, channel->index);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1040 buf_putint(ses.writepayload, recvwindow);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1041 buf_putint(ses.writepayload, recvmaxpacket);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1042
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1043 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
1044 TRACE(("leave send_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1045 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1046
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1047 /* 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
1048 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
1049
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1050 int closein = 0, closeout = 0;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1051
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1052 if (channel->type->sepfds) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1053 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
1054 shutdown(fd, how);
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1055 if (how == 0) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1056 closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1057 } else {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1058 closein = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1059 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1060 } else {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1061 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
1062 m_close(fd);
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1063 closein = closeout = 1;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1064 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1065
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1066 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
1067 channel->readfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1068 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1069 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
1070 channel->errfd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1071 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1072
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1073 if (closein && fd == channel->writefd) {
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1074 channel->writefd = FD_CLOSED;
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1075 }
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1076 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
1077 channel->errfd = FD_CLOSED;
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 /* 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
1081 * need to close() it to stop it lingering */
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1082 if (channel->type->sepfds && channel->readfd == FD_CLOSED
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1083 && channel->writefd == FD_CLOSED && channel->errfd == FD_CLOSED) {
375
8d149b812669 - Add some extra tracing.
Matt Johnston <matt@ucc.asn.au>
parents: 365
diff changeset
1084 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
1085 m_close(fd);
363
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1086 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1087 }
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1088
6ba2894ec8d5 Rearranged (and hopefully simplified) channel close/eof handling
Matt Johnston <matt@ucc.asn.au>
parents: 362
diff changeset
1089
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
1090 #if defined(USING_LISTENERS) || defined(DROPBEAR_CLIENT)
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1091 /* 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
1092 * 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
1093 * 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
1094 * 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
1095 * 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
1096 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
1097
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1098 struct Channel* chan;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1099
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
1100 TRACE(("enter send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1101 chan = newchannel(0, type, 0, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1102 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
1103 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
1104 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1105 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1106
707
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1107 /* 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
1108 * 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
1109 chan_initwritebuf(chan);
564e7f87ecc3 Fix memory leak when direct TCP connections time out on connection.
Matt Johnston <matt@ucc.asn.au>
parents: 673
diff changeset
1110
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1111 /* set fd non-blocking */
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
1112 setnonblocking(fd);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1113
253
84925eceeb13 * rename infd/outfd to writefd/readfd, to avoid confusion
Matt Johnston <matt@ucc.asn.au>
parents: 243
diff changeset
1114 chan->writefd = chan->readfd = fd;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1115 ses.maxfd = MAX(ses.maxfd, fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1116
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1117 chan->await_open = 1;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1118
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1119 /* now open the channel connection */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1120 CHECKCLEARTOWRITE();
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 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_OPEN);
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
1123 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
1124 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
1125 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
1126 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
1127
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
1128 TRACE(("leave send_msg_channel_open_init()"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1129 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1130 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1131
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1132 /* Confirmation that our channel open request (for forwardings) was
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1133 * successful*/
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1134 void recv_msg_channel_open_confirmation() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1135
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1136 struct Channel * channel;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1137 int ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1138
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
1139 TRACE(("enter recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1140
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1141 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1142
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1143 if (!channel->await_open) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
1144 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
1145 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1146 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1147
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1148 channel->remotechan = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1149 channel->transwindow = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1150 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
1151
187
c44df7123b0a compile fix when TRACE debugging is enabled
Matt Johnston <matt@ucc.asn.au>
parents: 179
diff changeset
1152 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
1153 channel->remotechan, channel->index))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1154
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1155 /* Run the inithandler callback */
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1156 if (channel->type->inithandler) {
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1157 ret = channel->type->inithandler(channel);
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1158 if (ret > 0) {
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1159 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
1160 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
1161 return;
37
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1162 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1163 }
0913e2ee3545 we're nearly there yet
Matt Johnston <matt@ucc.asn.au>
parents: 13
diff changeset
1164
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1165 if (channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1166 channel->prio = DROPBEAR_CHANNEL_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1167 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 938
diff changeset
1168 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
1169
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
1170 TRACE(("leave recv_msg_channel_open_confirmation"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1171 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1172
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1173 /* Notification that our channel open request failed */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1174 void recv_msg_channel_open_failure() {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1175
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1176 struct Channel * channel;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1177
179
161557a9dde8 * fix longstanding bug with connections being closed on failure to
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
1178 channel = getchannel();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1179
243
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1180 if (!channel->await_open) {
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 513
diff changeset
1181 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
1182 }
0056419cf0f4 * ensure that we only handle open confirmation/failure
Matt Johnston <matt@ucc.asn.au>
parents: 241
diff changeset
1183 channel->await_open = 0;
0056419cf0f4 * ensure that we only handle open confirmation/failure
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parents: 241
diff changeset
1184
359
78518751cb82 just shuffle some variables names about, a brief comment
Matt Johnston <matt@ucc.asn.au>
parents: 332
diff changeset
1185 remove_channel(channel);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1186 }
156
8c2b3506f112 Rearrange preprocessor parts so that compilation with various options
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
1187 #endif /* USING_LISTENERS */
937
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1188
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1189 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
1190 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1191 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
1192 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1193 }
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1194
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1195 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
1196 CHECKCLEARTOWRITE();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1197 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
1198 encrypt_packet();
4ad38e223ccd Send a failure response if a client receives a global request
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1199 }
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1200
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1201 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
1202 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
1203 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
1204 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
1205 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1206 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
1207 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
1208 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
1209 && !(chan->sent_eof || chan->recv_eof)
1025
02baa0b334e8 async connections working
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
1210 && !(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
1211 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
1212 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1213 }
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1214 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
1215 }
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 void start_send_channel_request(struct Channel *channel,
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1218 unsigned char *type) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1219
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1220 CHECKCLEARTOWRITE();
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1221 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
1222 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
1223
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1224 buf_putstring(ses.writepayload, type, strlen(type));
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1225
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 955
diff changeset
1226 }