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annotate common-session.c @ 1195:8a5e9a97bd7a

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Merge pull request #15 from annulen/fix_cli_remotetcpfwd Fixed build when ENABLE_CLI_REMOTETCPFWD is the only allowed TCP forw…
author Matt Johnston <matt@ucc.asn.au>
date Mon, 30 Nov 2015 21:13:03 +0800
parents b370b4b172d0
children 9169e4e7cbee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 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 #include "includes.h"
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26 #include "session.h"
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27 #include "dbutil.h"
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28 #include "packet.h"
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29 #include "algo.h"
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30 #include "buffer.h"
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31 #include "dss.h"
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32 #include "ssh.h"
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33 #include "dbrandom.h"
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34 #include "kex.h"
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35 #include "channel.h"
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36 #include "runopts.h"
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37 #include "netio.h"
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38
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39 static void checktimeouts();
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40 static long select_timeout();
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41 static int ident_readln(int fd, char* buf, int count);
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42 static void read_session_identification();
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43
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44 struct sshsession ses; /* GLOBAL */
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46 /* need to know if the session struct has been initialised, this way isn't the
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47 * cleanest, but works OK */
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48 int sessinitdone = 0; /* GLOBAL */
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50 /* this is set when we get SIGINT or SIGTERM, the handler is in main.c */
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51 int exitflag = 0; /* GLOBAL */
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53 /* called only at the start of a session, set up initial state */
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54 void common_session_init(int sock_in, int sock_out) {
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55 time_t now;
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56
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57 #ifdef DEBUG_TRACE
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58 debug_start_net();
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59 #endif
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60
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61 TRACE(("enter session_init"))
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62
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63 ses.sock_in = sock_in;
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64 ses.sock_out = sock_out;
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65 ses.maxfd = MAX(sock_in, sock_out);
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66
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67 if (sock_in >= 0) {
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68 setnonblocking(sock_in);
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69 }
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70 if (sock_out >= 0) {
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71 setnonblocking(sock_out);
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72 }
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73
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74 ses.socket_prio = DROPBEAR_PRIO_DEFAULT;
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75 /* Sets it to lowdelay */
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76 update_channel_prio();
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77
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78 now = monotonic_now();
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79 ses.connect_time = now;
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80 ses.last_packet_time_keepalive_recv = now;
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81 ses.last_packet_time_idle = now;
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82 ses.last_packet_time_any_sent = 0;
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83 ses.last_packet_time_keepalive_sent = 0;
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84
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85 if (pipe(ses.signal_pipe) < 0) {
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86 dropbear_exit("Signal pipe failed");
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87 }
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88 setnonblocking(ses.signal_pipe[0]);
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89 setnonblocking(ses.signal_pipe[1]);
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90
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91 ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[0]);
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92 ses.maxfd = MAX(ses.maxfd, ses.signal_pipe[1]);
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93
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94 ses.writepayload = buf_new(TRANS_MAX_PAYLOAD_LEN);
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95 ses.transseq = 0;
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96
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97 ses.readbuf = NULL;
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98 ses.payload = NULL;
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99 ses.recvseq = 0;
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100
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101 initqueue(&ses.writequeue);
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102
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103 ses.requirenext = SSH_MSG_KEXINIT;
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104 ses.dataallowed = 1; /* we can send data until we actually
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105 send the SSH_MSG_KEXINIT */
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106 ses.ignorenext = 0;
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107 ses.lastpacket = 0;
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108 ses.reply_queue_head = NULL;
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109 ses.reply_queue_tail = NULL;
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110
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111 /* set all the algos to none */
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112 ses.keys = (struct key_context*)m_malloc(sizeof(struct key_context));
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113 ses.newkeys = NULL;
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114 ses.keys->recv.algo_crypt = &dropbear_nocipher;
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115 ses.keys->trans.algo_crypt = &dropbear_nocipher;
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116 ses.keys->recv.crypt_mode = &dropbear_mode_none;
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117 ses.keys->trans.crypt_mode = &dropbear_mode_none;
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118
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119 ses.keys->recv.algo_mac = &dropbear_nohash;
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120 ses.keys->trans.algo_mac = &dropbear_nohash;
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121
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122 ses.keys->algo_kex = NULL;
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123 ses.keys->algo_hostkey = -1;
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124 ses.keys->recv.algo_comp = DROPBEAR_COMP_NONE;
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125 ses.keys->trans.algo_comp = DROPBEAR_COMP_NONE;
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126
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127 #ifndef DISABLE_ZLIB
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128 ses.keys->recv.zstream = NULL;
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129 ses.keys->trans.zstream = NULL;
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130 #endif
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131
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132 /* key exchange buffers */
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133 ses.session_id = NULL;
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134 ses.kexhashbuf = NULL;
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135 ses.transkexinit = NULL;
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136 ses.dh_K = NULL;
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137 ses.remoteident = NULL;
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138
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139 ses.chantypes = NULL;
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140
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141 ses.allowprivport = 0;
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142
165
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143 TRACE(("leave session_init"))
4
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144 }
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145
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146 void session_loop(void(*loophandler)()) {
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147
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148 fd_set readfd, writefd;
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149 struct timeval timeout;
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150 int val;
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151
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152 /* main loop, select()s for all sockets in use */
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153 for(;;) {
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154 const int writequeue_has_space = (ses.writequeue_len <= 2*TRANS_MAX_PAYLOAD_LEN);
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155
454
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156 timeout.tv_sec = select_timeout();
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157 timeout.tv_usec = 0;
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158 FD_ZERO(&writefd);
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159 FD_ZERO(&readfd);
241
c5d3ef11155f * use own assertions which should get logged properly
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diff changeset
160 dropbear_assert(ses.payload == NULL);
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161
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162 /* We get woken up when signal handlers write to this pipe.
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163 SIGCHLD in svr-chansession is the only one currently. */
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164 FD_SET(ses.signal_pipe[0], &readfd);
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165 ses.channel_signal_pending = 0;
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166
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167 /* set up for channels which can be read/written */
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168 setchannelfds(&readfd, &writefd, writequeue_has_space);
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169
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170 /* Pending connections to test */
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171 set_connect_fds(&writefd);
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172
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173 /* We delay reading from the input socket during initial setup until
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174 after we have written out our initial KEXINIT packet (empty writequeue).
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175 This means our initial packet can be in-flight while we're doing a blocking
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176 read for the remote ident.
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177 We also avoid reading from the socket if the writequeue is full, that avoids
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178 replies backing up */
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179 if (ses.sock_in != -1
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180 && (ses.remoteident || isempty(&ses.writequeue))
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181 && writequeue_has_space) {
479
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diff changeset
182 FD_SET(ses.sock_in, &readfd);
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183 }
1151
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184
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185 /* Ordering is important, this test must occur after any other function
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diff changeset
186 might have queued packets (such as connection handlers) */
479
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
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diff changeset
187 if (ses.sock_out != -1 && !isempty(&ses.writequeue)) {
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
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diff changeset
188 FD_SET(ses.sock_out, &writefd);
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189 }
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190
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191 val = select(ses.maxfd+1, &readfd, &writefd, NULL, &timeout);
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diff changeset
192
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193 if (exitflag) {
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194 dropbear_exit("Terminated by signal");
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195 }
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196
373
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197 if (val < 0 && errno != EINTR) {
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198 dropbear_exit("Error in select");
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199 }
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
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200
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
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diff changeset
201 if (val <= 0) {
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
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diff changeset
202 /* If we were interrupted or the select timed out, we still
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
203 * want to iterate over channels etc for reading, to handle
70caa99bfe3a Tidy up behaviour when select() is interrupted. We follow normal
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diff changeset
204 * server processes exiting etc.
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diff changeset
205 * We don't want to read/write FDs. */
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diff changeset
206 FD_ZERO(&writefd);
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diff changeset
207 FD_ZERO(&readfd);
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208 }
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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diff changeset
209
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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diff changeset
210 /* We'll just empty out the pipe if required. We don't do
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diff changeset
211 any thing with the data, since the pipe's purpose is purely to
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parents: 373
diff changeset
212 wake up the select() above. */
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parents: 373
diff changeset
213 if (FD_ISSET(ses.signal_pipe[0], &readfd)) {
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diff changeset
214 char x;
1191
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diff changeset
215 TRACE(("signal pipe set"))
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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parents: 373
diff changeset
216 while (read(ses.signal_pipe[0], &x, 1) > 0) {}
1191
b370b4b172d0 Fix ses.channel_signal_pending race
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parents: 1151
diff changeset
217 ses.channel_signal_pending = 1;
416
a01c0c8e543a Improve behaviour when flushing out after a process has exited.
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diff changeset
218 }
26
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diff changeset
219
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220 /* check for auth timeout, rekeying required etc */
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diff changeset
221 checktimeouts();
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diff changeset
222
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diff changeset
223 /* process session socket's incoming data */
479
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
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parents: 454
diff changeset
224 if (ses.sock_in != -1) {
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
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parents: 454
diff changeset
225 if (FD_ISSET(ses.sock_in, &readfd)) {
726
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diff changeset
226 if (!ses.remoteident) {
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diff changeset
227 /* blocking read of the version string */
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diff changeset
228 read_session_identification();
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diff changeset
229 } else {
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diff changeset
230 read_packet();
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diff changeset
231 }
26
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diff changeset
232 }
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diff changeset
233
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diff changeset
234 /* Process the decrypted packet. After this, the read buffer
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parents: 24
diff changeset
235 * will be ready for a new packet */
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diff changeset
236 if (ses.payload != NULL) {
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diff changeset
237 process_packet();
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diff changeset
238 }
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diff changeset
239 }
1025
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parents: 1021
diff changeset
240
452
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
241 /* if required, flush out any queued reply packets that
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents: 448
diff changeset
242 were being held up during a KEX */
4cab61369879 Prevent invalid packets being sent during key-exchange, instead queue
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parents: 448
diff changeset
243 maybe_flush_reply_queue();
26
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diff changeset
244
1025
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diff changeset
245 handle_connect_fds(&writefd);
02baa0b334e8 async connections working
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diff changeset
246
26
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diff changeset
247 /* process pipes etc for the channels, ses.dataallowed == 0
0969767bca0d snapshot of stuff
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diff changeset
248 * during rekeying ) */
896
a1a97e98b0c1 Read (and enqueue) packets from interactive input even when
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parents: 891
diff changeset
249 channelio(&readfd, &writefd);
26
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diff changeset
250
929
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
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parents: 928
diff changeset
251 /* process session socket's outgoing data */
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
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parents: 928
diff changeset
252 if (ses.sock_out != -1) {
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
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parents: 928
diff changeset
253 if (!isempty(&ses.writequeue)) {
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
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parents: 928
diff changeset
254 write_packet();
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
255 }
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
256 }
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
257
9d40ed1da686 Experiment of always writing data if available. Might waste a writev() with
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parents: 928
diff changeset
258
26
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diff changeset
259 if (loophandler) {
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parents: 24
diff changeset
260 loophandler();
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parents: 24
diff changeset
261 }
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diff changeset
262
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diff changeset
263 } /* for(;;) */
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diff changeset
264
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diff changeset
265 /* Not reached */
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parents: 24
diff changeset
266 }
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diff changeset
267
1040
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
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parents: 1038
diff changeset
268 static void cleanup_buf(buffer **buf) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
269 if (!*buf) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
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parents: 1038
diff changeset
270 return;
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
271 }
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
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parents: 1038
diff changeset
272 buf_burn(*buf);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
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parents: 1038
diff changeset
273 buf_free(*buf);
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parents: 1038
diff changeset
274 *buf = NULL;
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parents: 1038
diff changeset
275 }
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
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parents: 1038
diff changeset
276
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
277 /* clean up a session on exit */
733
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parents: 726
diff changeset
278 void session_cleanup() {
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
279
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 135
diff changeset
280 TRACE(("enter session_cleanup"))
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
281
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
282 /* we can't cleanup if we don't know the session state */
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
283 if (!sessinitdone) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
284 TRACE(("leave session_cleanup: !sessinitdone"))
4
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
285 return;
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
286 }
733
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Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
287
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
288 /* BEWARE of changing order of functions here. */
1041
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
289
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
290 /* Must be before extra_session_cleanup() */
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
291 chancleanup();
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
292
733
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
293 if (ses.extra_session_cleanup) {
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
294 ses.extra_session_cleanup();
70811267715c Run the cleanup handler also when we close due to TCP connection being closed
Matt Johnston <matt@ucc.asn.au>
parents: 726
diff changeset
295 }
891
e78f5ce6e7bb cleanup before clearing keys
Matt Johnston <matt@ucc.asn.au>
parents: 886
diff changeset
296
1079
acf444bcb115 Fix no-writev fallback
Matt Johnston <matt@ucc.asn.au>
parents: 1074
diff changeset
297 /* After these are freed most functions will fail */
1040
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
298 #ifdef DROPBEAR_CLEANUP
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
299 /* listeners call cleanup functions, this should occur before
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
300 other session state is freed. */
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
301 remove_all_listeners();
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
302
1050
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
303 remove_connect_pending();
c2a50c9f509e Add cleanup
Matt Johnston <matt@ucc.asn.au>
parents: 1049
diff changeset
304
1040
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
305 while (!isempty(&ses.writequeue)) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
306 buf_free(dequeue(&ses.writequeue));
761
ac2158e3e403 ecc kind of works, needs fixing/testing
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
307 }
1040
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
308
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
309 m_free(ses.remoteident);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
310 m_free(ses.authstate.pw_dir);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
311 m_free(ses.authstate.pw_name);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
312 m_free(ses.authstate.pw_shell);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
313 m_free(ses.authstate.pw_passwd);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
314 m_free(ses.authstate.username);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
315 #endif
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
316
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
317 cleanup_buf(&ses.session_id);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
318 cleanup_buf(&ses.hash);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
319 cleanup_buf(&ses.payload);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
320 cleanup_buf(&ses.readbuf);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
321 cleanup_buf(&ses.writepayload);
1041
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
322 cleanup_buf(&ses.kexhashbuf);
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
323 cleanup_buf(&ses.transkexinit);
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
324 if (ses.dh_K) {
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
325 mp_clear(ses.dh_K);
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
326 }
3fb883a6aa81 Some additional cleanup functions
Matt Johnston <matt@ucc.asn.au>
parents: 1040
diff changeset
327 m_free(ses.dh_K);
1040
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann.
Matt Johnston <matt@ucc.asn.au>
parents: 1038
diff changeset
328
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
329 m_burn(ses.keys, sizeof(struct key_context));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
330 m_free(ses.keys);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
331
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
332 TRACE(("leave session_cleanup"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
333 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
334
726
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
335 void send_session_identification() {
751
685d05f1cc5c Just put the version string on the queue, don't use atomicio
Matt Johnston <matt@ucc.asn.au>
parents: 733
diff changeset
336 buffer *writebuf = buf_new(strlen(LOCAL_IDENT "\r\n") + 1);
1094
c45d65392c1a Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents: 1079
diff changeset
337 buf_putbytes(writebuf, (const unsigned char *) LOCAL_IDENT "\r\n", strlen(LOCAL_IDENT "\r\n"));
1074
10f198d4a308 Make main socket nonblocking. Limit writequeue size.
Matt Johnston <matt@ucc.asn.au>
parents: 1060
diff changeset
338 writebuf_enqueue(writebuf, 0);
726
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
339 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
340
726
78eda530c000 send out our kexinit packet before blocking to read the SSH version string
Matt Johnston <matt@ucc.asn.au>
parents: 705
diff changeset
341 static void read_session_identification() {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
342 /* max length of 255 chars */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
343 char linebuf[256];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
344 int len = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
345 char done = 0;
103
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
346 int i;
513
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
347 /* If they send more than 50 lines, something is wrong */
275
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents: 242
diff changeset
348 for (i = 0; i < 50; i++) {
479
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation
Matt Johnston <matt@ucc.asn.au>
parents: 454
diff changeset
349 len = ident_readln(ses.sock_in, linebuf, sizeof(linebuf));
103
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
350
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
351 if (len < 0 && errno != EINTR) {
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
352 /* It failed */
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
353 break;
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
354 }
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
355
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
356 if (len >= 4 && memcmp(linebuf, "SSH-", 4) == 0) {
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
357 /* start of line matches */
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
358 done = 1;
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
359 break;
8aeac62a968f Allow leading lines before the ident banner when connecting
Matt Johnston <matt@ucc.asn.au>
parents: 41
diff changeset
360 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
361 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
362
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 if (!done) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
364 TRACE(("err: %s for '%s'\n", strerror(errno), linebuf))
344
bf29e6659fb9 Just use the normal "remote closed" handler when reading ident stings
Matt Johnston <matt@ucc.asn.au>
parents: 275
diff changeset
365 ses.remoteclosed();
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
366 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
367 /* linebuf is already null terminated */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
368 ses.remoteident = m_malloc(len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
369 memcpy(ses.remoteident, linebuf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
370 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
371
513
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
372 /* Shall assume that 2.x will be backwards compatible. */
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
373 if (strncmp(ses.remoteident, "SSH-2.", 6) != 0
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
374 && strncmp(ses.remoteident, "SSH-1.99-", 9) != 0) {
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
375 dropbear_exit("Incompatible remote version '%s'", ses.remoteident);
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
376 }
275
7f9adaf85fca Exit with a message if the ssh protocol version is incompatible
Matt Johnston <matt@ucc.asn.au>
parents: 242
diff changeset
377
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
378 TRACE(("remoteident: %s", ses.remoteident))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
379
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
380 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
381
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 /* returns the length including null-terminating zero on success,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383 * or -1 on failure */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 static int ident_readln(int fd, char* buf, int count) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 char in;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 int pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388 int num = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 fd_set fds;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 struct timeval timeout;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
391
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
392 TRACE(("enter ident_readln"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394 if (count < 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398 FD_ZERO(&fds);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400 /* select since it's a non-blocking fd */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
402 /* leave space to null-terminate */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403 while (pos < count-1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405 FD_SET(fd, &fds);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 timeout.tv_sec = 1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408 timeout.tv_usec = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
409 if (select(fd+1, &fds, NULL, NULL, &timeout) < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
410 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411 continue;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
412 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
413 TRACE(("leave ident_readln: select error"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
415 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
416
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 checktimeouts();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
418
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 /* Have to go one byte at a time, since we don't want to read past
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420 * the end, and have to somehow shove bytes back into the normal
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421 * packet reader */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
422 if (FD_ISSET(fd, &fds)) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
423 num = read(fd, &in, 1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
424 /* a "\n" is a newline, "\r" we want to read in and keep going
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425 * so that it won't be read as part of the next line */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
426 if (num < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
427 /* error */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
428 if (errno == EINTR) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
429 continue; /* not a real error */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
431 TRACE(("leave ident_readln: read error"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
432 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 if (num == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 /* EOF */
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
436 TRACE(("leave ident_readln: EOF"))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 return -1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 if (in == '\n') {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440 /* end of ident string */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 /* we don't want to include '\r's */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 if (in != '\r') {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445 buf[pos] = in;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 buf[pos] = '\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: 135
diff changeset
452 TRACE(("leave ident_readln: return %d", pos+1))
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453 return pos+1;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
455
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
456 void ignore_recv_response() {
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 1021
diff changeset
457 /* Do nothing */
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
458 TRACE(("Ignored msg_request_response"))
968
f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
Matt Johnston <matt@ucc.asn.au>
parents: 941
diff changeset
459 }
f7f6c15b0ec3 Don't send SSH_MSG_UNIMPLEMENTED for keepalive responses
Matt Johnston <matt@ucc.asn.au>
parents: 941
diff changeset
460
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
461 static void send_msg_keepalive() {
1038
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 1021
diff changeset
462 time_t old_time_idle = ses.last_packet_time_idle;
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 1021
diff changeset
463 struct Channel *chan = get_any_ready_channel();
d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents: 1021
diff changeset
464
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
465 CHECKCLEARTOWRITE();
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
466
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
467 if (chan) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
468 /* Channel requests are preferable, more implementations
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
469 handle them than SSH_MSG_GLOBAL_REQUEST */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
470 TRACE(("keepalive channel request %d", chan->index))
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
471 start_send_channel_request(chan, DROPBEAR_KEEPALIVE_STRING);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
472 } else {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
473 TRACE(("keepalive global request"))
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
474 /* Some peers will reply with SSH_MSG_REQUEST_FAILURE,
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
475 some will reply with SSH_MSG_UNIMPLEMENTED, some will exit. */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
476 buf_putbyte(ses.writepayload, SSH_MSG_GLOBAL_REQUEST);
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
477 buf_putstring(ses.writepayload, DROPBEAR_KEEPALIVE_STRING,
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
478 strlen(DROPBEAR_KEEPALIVE_STRING));
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
479 }
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
480 buf_putbyte(ses.writepayload, 1); /* want_reply */
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
481 encrypt_packet();
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
482
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
483 ses.last_packet_time_keepalive_sent = monotonic_now();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
484
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
485 /* keepalives shouldn't update idle timeout, reset it back */
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
486 ses.last_packet_time_idle = old_time_idle;
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
487 }
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
488
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
489 /* Check all timeouts which are required. Currently these are the time for
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
490 * user authentication, and the automatic rekeying. */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
491 static void checktimeouts() {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
492
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
493 time_t now;
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 927
diff changeset
494 now = monotonic_now();
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
495
1139
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
496 if (IS_DROPBEAR_SERVER && ses.connect_time != 0
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
497 && now - ses.connect_time >= AUTH_TIMEOUT) {
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
498 dropbear_close("Timeout before auth");
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
499 }
43a8ea69b24c Fix problem where auth timeout wasn't checked when waiting for ident
Matt Johnston <matt@ucc.asn.au>
parents: 1124
diff changeset
500
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
501 /* we can't rekey if we haven't done remote ident exchange yet */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
502 if (ses.remoteident == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
503 return;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
504 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
505
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
506 if (!ses.kexstate.sentkexinit
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
507 && (now - ses.kexstate.lastkextime >= KEX_REKEY_TIMEOUT
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
508 || ses.kexstate.datarecv+ses.kexstate.datatrans >= KEX_REKEY_DATA)) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 135
diff changeset
509 TRACE(("rekeying after timeout or max data reached"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
510 send_msg_kexinit();
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
511 }
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
512
970
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
513 if (opts.keepalive_secs > 0 && ses.authstate.authdone) {
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
514 /* Avoid sending keepalives prior to auth - those are
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
515 not valid pre-auth packet types */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does
Matt Johnston <matt@ucc.asn.au>
parents: 968
diff changeset
516
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
517 /* Send keepalives if we've been idle */
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
518 if (now - ses.last_packet_time_any_sent >= opts.keepalive_secs) {
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
519 send_msg_keepalive();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
520 }
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
521
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
522 /* Also send an explicit keepalive message to trigger a response
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
523 if the remote end hasn't sent us anything */
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
524 if (now - ses.last_packet_time_keepalive_recv >= opts.keepalive_secs
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
525 && now - ses.last_packet_time_keepalive_sent >= opts.keepalive_secs) {
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
526 send_msg_keepalive();
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
527 }
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
528
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
529 if (now - ses.last_packet_time_keepalive_recv
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
530 >= opts.keepalive_secs * DEFAULT_KEEPALIVE_LIMIT) {
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
531 dropbear_exit("Keepalive timeout");
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
532 }
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
533 }
513
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
534
939
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
535 if (opts.idle_timeout_secs > 0
a0819ecfee0b Make -K keepalive behave like OpenSSH's ServerAliveInterval
Matt Johnston <matt@ucc.asn.au>
parents: 929
diff changeset
536 && now - ses.last_packet_time_idle >= opts.idle_timeout_secs) {
513
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
537 dropbear_close("Idle timeout");
a3748e54273c Idle timeout patch from Farrell Aultman. Needs testing, unsure if server
Matt Johnston <matt@ucc.asn.au>
parents: 502
diff changeset
538 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
539 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
540
1140
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
541 static void update_timeout(long limit, long now, long last_event, long * timeout) {
1143
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
542 TRACE2(("update_timeout limit %ld, now %ld, last %ld, timeout %ld",
1140
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
543 limit, now, last_event, *timeout))
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
544 if (last_event > 0 && limit > 0) {
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
545 *timeout = MIN(*timeout, last_event+limit-now);
1143
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
546 TRACE2(("new timeout %ld", *timeout))
1140
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
547 }
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
548 }
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
549
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
550 static long select_timeout() {
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
551 /* determine the minimum timeout that might be required, so
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
552 as to avoid waking when unneccessary */
1140
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
553 long timeout = LONG_MAX;
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
554 long now = monotonic_now();
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
555
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
556 update_timeout(KEX_REKEY_TIMEOUT, now, ses.kexstate.lastkextime, &timeout);
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
557
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
558 if (ses.authstate.authdone != 1 && IS_DROPBEAR_SERVER) {
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
559 /* AUTH_TIMEOUT is only relevant before authdone */
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
560 update_timeout(AUTH_TIMEOUT, now, ses.connect_time, &timeout);
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
561 }
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
562
1143
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
563 if (ses.authstate.authdone) {
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
564 update_timeout(opts.keepalive_secs, now,
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
565 MAX(ses.last_packet_time_keepalive_recv, ses.last_packet_time_keepalive_sent),
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
566 &timeout);
924ff1b959a2 only update keepalive timeout post-auth (when keepalives are sent)
Matt Johnston <matt@ucc.asn.au>
parents: 1140
diff changeset
567 }
1140
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
568
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
569 update_timeout(opts.idle_timeout_secs, now, ses.last_packet_time_idle,
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
570 &timeout);
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
571
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
572 /* clamp negative timeouts to zero - event has already triggered */
f6d3a16ecc71 set timeouts to time remaining rather than timeout duration
Matt Johnston <matt@ucc.asn.au>
parents: 1139
diff changeset
573 return MAX(timeout, 0);
454
7e43f5e473b9 - Add -K keepalive flag for dropbear and dbclient
Matt Johnston <matt@ucc.asn.au>
parents: 452
diff changeset
574 }
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
575
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
576 const char* get_user_shell() {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
577 /* an empty shell should be interpreted as "/bin/sh" */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
578 if (ses.authstate.pw_shell[0] == '\0') {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
579 return "/bin/sh";
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
580 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
581 return ses.authstate.pw_shell;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
582 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 479
diff changeset
583 }
483
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
584 void fill_passwd(const char* username) {
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
585 struct passwd *pw = NULL;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
586 if (ses.authstate.pw_name)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
587 m_free(ses.authstate.pw_name);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
588 if (ses.authstate.pw_dir)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
589 m_free(ses.authstate.pw_dir);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
590 if (ses.authstate.pw_shell)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
591 m_free(ses.authstate.pw_shell);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
592 if (ses.authstate.pw_passwd)
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
593 m_free(ses.authstate.pw_passwd);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
594
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
595 pw = getpwnam(username);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
596 if (!pw) {
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
597 return;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
598 }
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
599 ses.authstate.pw_uid = pw->pw_uid;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
600 ses.authstate.pw_gid = pw->pw_gid;
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
601 ses.authstate.pw_name = m_strdup(pw->pw_name);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
602 ses.authstate.pw_dir = m_strdup(pw->pw_dir);
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
603 ses.authstate.pw_shell = m_strdup(pw->pw_shell);
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
604 {
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
605 char *passwd_crypt = pw->pw_passwd;
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
606 #ifdef HAVE_SHADOW_H
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
607 /* get the shadow password if possible */
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
608 struct spwd *spasswd = getspnam(ses.authstate.pw_name);
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
609 if (spasswd && spasswd->sp_pwdp) {
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
610 passwd_crypt = spasswd->sp_pwdp;
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
611 }
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
612 #endif
705
2e573f39b88e Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
613 if (!passwd_crypt) {
2e573f39b88e Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
614 /* android supposedly returns NULL */
2e573f39b88e Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
615 passwd_crypt = "!!";
2e573f39b88e Android returns NULL for pw_crypt, set it to something else
Matt Johnston <matt@ucc.asn.au>
parents: 676
diff changeset
616 }
676
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
617 ses.authstate.pw_passwd = m_strdup(passwd_crypt);
0edf08895a33 Return immediate success for blank passwords if allowed
Matt Johnston <matt@ucc.asn.au>
parents: 594
diff changeset
618 }
483
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
619 }
738313e73b1c - "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
620
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
621 /* Called when channels are modified */
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
622 void update_channel_prio() {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
623 enum dropbear_prio new_prio;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
624 int any = 0;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
625 unsigned int i;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
626
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
627 TRACE(("update_channel_prio"))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
628
1031
64c0aa01e2b6 Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
629 if (ses.sock_out < 0) {
64c0aa01e2b6 Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
630 TRACE(("leave update_channel_prio: no socket"))
64c0aa01e2b6 Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
631 return;
64c0aa01e2b6 Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
632 }
64c0aa01e2b6 Update priority once the socket is open
Matt Johnston <matt@ucc.asn.au>
parents: 1025
diff changeset
633
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
634 new_prio = DROPBEAR_PRIO_BULK;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
635 for (i = 0; i < ses.chansize; i++) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
636 struct Channel *channel = ses.channels[i];
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
637 if (!channel || channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
638 if (channel && channel->prio == DROPBEAR_CHANNEL_PRIO_EARLY) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
639 TRACE(("update_channel_prio: early %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
640 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
641 continue;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
642 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
643 any = 1;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
644 if (channel->prio == DROPBEAR_CHANNEL_PRIO_INTERACTIVE)
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
645 {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
646 TRACE(("update_channel_prio: lowdelay %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
647 new_prio = DROPBEAR_PRIO_LOWDELAY;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
648 break;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
649 } else if (channel->prio == DROPBEAR_CHANNEL_PRIO_UNKNOWABLE
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
650 && new_prio == DROPBEAR_PRIO_BULK)
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
651 {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
652 TRACE(("update_channel_prio: unknowable %d", channel->index))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
653 new_prio = DROPBEAR_PRIO_DEFAULT;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
654 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
655 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
656
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
657 if (any == 0) {
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
658 /* lowdelay during setup */
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
659 TRACE(("update_channel_prio: not any"))
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
660 new_prio = DROPBEAR_PRIO_LOWDELAY;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
661 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
662
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
663 if (new_prio != ses.socket_prio) {
1020
363c0feca5d4 Fix print that no longer works since we're not using fourCCs
Matt Johnston <matt@ucc.asn.au>
parents: 970
diff changeset
664 TRACE(("Dropbear priority transitioning %d -> %d", ses.socket_prio, new_prio))
941
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
665 set_sock_priority(ses.sock_out, new_prio);
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
666 ses.socket_prio = new_prio;
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
667 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
668 }
5daedffd0769 Set tcp priority as follows:
Matt Johnston <matt@ucc.asn.au>
parents: 940
diff changeset
669